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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
0b302171 | 3 | Copyright (C) 1999-2003, 2006-2012 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "gdbcore.h" | |
65554fef | 27 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 28 | #include "gdbcmd.h" |
0fda6bd2 | 29 | #include "gdbthread.h" |
7f7fe91e | 30 | #include "regcache.h" |
28439f5e | 31 | #include "inf-child.h" |
c906108c | 32 | |
c3f6f71d | 33 | #if defined (NEW_PROC_API) |
0df8b418 | 34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 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" |
4e73f23d | 51 | #include "auxv.h" |
d1a7880c | 52 | #include "procfs.h" |
27087a3d | 53 | #include "observer.h" |
0fda6bd2 | 54 | |
77382aee PA |
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 | ||
59 | Examples of the systems that use this interface are: | |
60 | ||
61 | Irix | |
62 | Solaris | |
63 | OSF | |
64 | Unixware | |
65 | AIX5 | |
66 | ||
67 | /proc works by imitating a file system: you open a simulated file | |
68 | that represents the process you wish to interact with, and perform | |
69 | operations on that "file" in order to examine or change the state | |
70 | of the other process. | |
71 | ||
72 | The most important thing to know about /proc and this module is | |
73 | that there are two very different interfaces to /proc: | |
74 | ||
75 | One that uses the ioctl system call, and another that uses read | |
76 | and write system calls. | |
77 | ||
78 | This module has to support both /proc interfaces. This means that | |
79 | there are two different ways of doing every basic operation. | |
80 | ||
81 | In order to keep most of the code simple and clean, I have defined | |
82 | an interface "layer" which hides all these system calls. An ifdef | |
83 | (NEW_PROC_API) determines which interface we are using, and most or | |
84 | all occurrances of this ifdef should be confined to this interface | |
85 | layer. */ | |
86 | ||
87 | /* Determine which /proc API we are using: The ioctl API defines | |
88 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 89 | |
c3f6f71d | 90 | #ifdef NEW_PROC_API |
c906108c | 91 | #include <sys/types.h> |
4b14d3e4 | 92 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 93 | #endif |
c906108c | 94 | |
c3f6f71d JM |
95 | #include <fcntl.h> /* for O_RDONLY */ |
96 | #include <unistd.h> /* for "X_OK" */ | |
97 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 98 | |
103b3ef5 MS |
99 | /* Note: procfs-utils.h must be included after the above system header |
100 | files, because it redefines various system calls using macros. | |
101 | This may be incompatible with the prototype declarations. */ | |
102 | ||
103b3ef5 MS |
103 | #include "proc-utils.h" |
104 | ||
77382aee | 105 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
106 | #include "gregset.h" |
107 | ||
c3f6f71d | 108 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 109 | |
77382aee | 110 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 111 | |
136d6dae VP |
112 | static void procfs_attach (struct target_ops *, char *, int); |
113 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e PA |
114 | static void procfs_resume (struct target_ops *, |
115 | ptid_t, int, enum target_signal); | |
f9c72d52 | 116 | static void procfs_stop (ptid_t); |
a14ed312 | 117 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
118 | static void procfs_fetch_registers (struct target_ops *, |
119 | struct regcache *, int); | |
120 | static void procfs_store_registers (struct target_ops *, | |
121 | struct regcache *, int); | |
13bdd2e7 | 122 | static void procfs_pass_signals (int, unsigned char *); |
7d85a9c0 | 123 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 124 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 125 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 126 | char *, char **, int); |
117de6a9 | 127 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 128 | ptid_t, struct target_waitstatus *, int); |
0b62613e | 129 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
130 | struct mem_attrib *attrib, |
131 | struct target_ops *); | |
4e73f23d RM |
132 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
133 | enum target_object object, | |
134 | const char *annex, | |
3e43a32a MS |
135 | gdb_byte *readbuf, |
136 | const gdb_byte *writebuf, | |
4e73f23d | 137 | ULONGEST offset, LONGEST len); |
a14ed312 | 138 | |
28439f5e | 139 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 140 | |
28439f5e | 141 | void procfs_find_new_threads (struct target_ops *ops); |
117de6a9 | 142 | char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 143 | |
19958708 RM |
144 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
145 | unsigned long, | |
146 | int, int, int, | |
147 | void *), | |
be4d1333 MS |
148 | void *); |
149 | ||
150 | static char * procfs_make_note_section (bfd *, int *); | |
151 | ||
1e03ad20 KB |
152 | static int procfs_can_use_hw_breakpoint (int, int, int); |
153 | ||
145b16a9 UW |
154 | static void procfs_info_proc (struct target_ops *, char *, |
155 | enum info_proc_what); | |
156 | ||
c47ffbe3 | 157 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
158 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
159 | is presented in 64-bit format. We need to provide a custom parser | |
160 | to handle that. */ | |
c47ffbe3 VP |
161 | static int |
162 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 163 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 164 | { |
e17a4113 | 165 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); |
c47ffbe3 VP |
166 | gdb_byte *ptr = *readptr; |
167 | ||
168 | if (endptr == ptr) | |
169 | return 0; | |
77382aee | 170 | |
c47ffbe3 VP |
171 | if (endptr - ptr < 8 * 2) |
172 | return -1; | |
173 | ||
e17a4113 | 174 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
175 | ptr += 8; |
176 | /* The size of data is always 64-bit. If the application is 32-bit, | |
177 | it will be zero extended, as expected. */ | |
e17a4113 | 178 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
179 | ptr += 8; |
180 | ||
181 | *readptr = ptr; | |
182 | return 1; | |
183 | } | |
184 | #endif | |
185 | ||
d1a7880c | 186 | struct target_ops * |
28439f5e | 187 | procfs_target (void) |
c3f6f71d | 188 | { |
28439f5e PA |
189 | struct target_ops *t = inf_child_target (); |
190 | ||
77382aee PA |
191 | t->to_shortname = "procfs"; |
192 | t->to_longname = "Unix /proc child process"; | |
193 | t->to_doc = | |
c3f6f71d | 194 | "Unix /proc child process (started by the \"run\" command)."; |
77382aee PA |
195 | t->to_create_inferior = procfs_create_inferior; |
196 | t->to_kill = procfs_kill_inferior; | |
197 | t->to_mourn_inferior = procfs_mourn_inferior; | |
198 | t->to_attach = procfs_attach; | |
199 | t->to_detach = procfs_detach; | |
200 | t->to_wait = procfs_wait; | |
201 | t->to_resume = procfs_resume; | |
202 | t->to_fetch_registers = procfs_fetch_registers; | |
203 | t->to_store_registers = procfs_store_registers; | |
204 | t->to_xfer_partial = procfs_xfer_partial; | |
28439f5e | 205 | t->deprecated_xfer_memory = procfs_xfer_memory; |
2455069d | 206 | t->to_pass_signals = procfs_pass_signals; |
77382aee PA |
207 | t->to_files_info = procfs_files_info; |
208 | t->to_stop = procfs_stop; | |
28439f5e | 209 | |
77382aee PA |
210 | t->to_find_new_threads = procfs_find_new_threads; |
211 | t->to_thread_alive = procfs_thread_alive; | |
212 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 213 | |
77382aee | 214 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
215 | t->to_find_memory_regions = proc_find_memory_regions; |
216 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 217 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
218 | |
219 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 220 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
221 | #endif |
222 | ||
77382aee | 223 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
224 | |
225 | return t; | |
c3f6f71d | 226 | } |
c906108c | 227 | |
c3f6f71d JM |
228 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
229 | ||
77382aee PA |
230 | /* World Unification: |
231 | ||
232 | Put any typedefs, defines etc. here that are required for the | |
233 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
234 | |
235 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 236 | #ifdef WA_READ |
19958708 | 237 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
238 | WRITE_WATCHFLAG = WA_WRITE, |
239 | EXEC_WATCHFLAG = WA_EXEC, | |
240 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
241 | }; | |
242 | #endif | |
243 | #else /* Irix method for watchpoints */ | |
19958708 | 244 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
245 | WRITE_WATCHFLAG = MA_WRITE, |
246 | EXEC_WATCHFLAG = MA_EXEC, | |
247 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
248 | }; | |
249 | #endif | |
250 | ||
37de36c6 KB |
251 | /* gdb_sigset_t */ |
252 | #ifdef HAVE_PR_SIGSET_T | |
253 | typedef pr_sigset_t gdb_sigset_t; | |
254 | #else | |
255 | typedef sigset_t gdb_sigset_t; | |
256 | #endif | |
257 | ||
258 | /* sigaction */ | |
259 | #ifdef HAVE_PR_SIGACTION64_T | |
260 | typedef pr_sigaction64_t gdb_sigaction_t; | |
261 | #else | |
262 | typedef struct sigaction gdb_sigaction_t; | |
263 | #endif | |
264 | ||
265 | /* siginfo */ | |
266 | #ifdef HAVE_PR_SIGINFO64_T | |
267 | typedef pr_siginfo64_t gdb_siginfo_t; | |
268 | #else | |
269 | typedef struct siginfo gdb_siginfo_t; | |
270 | #endif | |
271 | ||
3c95f01c JB |
272 | /* On mips-irix, praddset and prdelset are defined in such a way that |
273 | they return a value, which causes GCC to emit a -Wunused error | |
274 | because the returned value is not used. Prevent this warning | |
275 | by casting the return value to void. On sparc-solaris, this issue | |
276 | does not exist because the definition of these macros already include | |
277 | that cast to void. */ | |
278 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
279 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
280 | ||
37de36c6 KB |
281 | /* gdb_premptysysset */ |
282 | #ifdef premptysysset | |
283 | #define gdb_premptysysset premptysysset | |
284 | #else | |
285 | #define gdb_premptysysset premptyset | |
286 | #endif | |
287 | ||
288 | /* praddsysset */ | |
289 | #ifdef praddsysset | |
290 | #define gdb_praddsysset praddsysset | |
291 | #else | |
3c95f01c | 292 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
293 | #endif |
294 | ||
295 | /* prdelsysset */ | |
296 | #ifdef prdelsysset | |
297 | #define gdb_prdelsysset prdelsysset | |
298 | #else | |
3c95f01c | 299 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
300 | #endif |
301 | ||
302 | /* prissyssetmember */ | |
303 | #ifdef prissyssetmember | |
304 | #define gdb_pr_issyssetmember prissyssetmember | |
305 | #else | |
306 | #define gdb_pr_issyssetmember prismember | |
307 | #endif | |
308 | ||
309 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
310 | as intuitively descriptive as it could be, so we'll define | |
311 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
312 | this writing, this feature is only found on AIX5 systems and | |
313 | basically means that the set of syscalls is not fixed. I.e, | |
314 | there's no nice table that one can #include to get all of the | |
315 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
316 | for each process. We are at least guaranteed that they won't | |
317 | change over the lifetime of the process. But each process could | |
77382aee | 318 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
319 | #ifdef HAVE_PRSYSENT_T |
320 | #define DYNAMIC_SYSCALLS | |
321 | #endif | |
c3f6f71d JM |
322 | |
323 | ||
324 | ||
325 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
326 | ||
327 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
328 | ||
329 | /* The procinfo struct is a wrapper to hold all the state information | |
330 | concerning a /proc process. There should be exactly one procinfo | |
331 | for each process, and since GDB currently can debug only one | |
332 | process at a time, that means there should be only one procinfo. | |
333 | All of the LWP's of a process can be accessed indirectly thru the | |
334 | single process procinfo. | |
335 | ||
336 | However, against the day when GDB may debug more than one process, | |
337 | this data structure is kept in a list (which for now will hold no | |
338 | more than one member), and many functions will have a pointer to a | |
339 | procinfo as an argument. | |
340 | ||
341 | There will be a separate procinfo structure for use by the (not yet | |
342 | implemented) "info proc" command, so that we can print useful | |
343 | information about any random process without interfering with the | |
0df8b418 | 344 | inferior's procinfo information. */ |
c3f6f71d JM |
345 | |
346 | #ifdef NEW_PROC_API | |
347 | /* format strings for /proc paths */ | |
348 | # ifndef CTL_PROC_NAME_FMT | |
349 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
350 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
351 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
352 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
353 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
354 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
355 | # endif | |
356 | /* the name of the proc status struct depends on the implementation */ | |
357 | typedef pstatus_t gdb_prstatus_t; | |
358 | typedef lwpstatus_t gdb_lwpstatus_t; | |
359 | #else /* ! NEW_PROC_API */ | |
360 | /* format strings for /proc paths */ | |
361 | # ifndef CTL_PROC_NAME_FMT | |
362 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
363 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
364 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
365 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
366 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
367 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
368 | # endif | |
0df8b418 | 369 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 370 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
371 | typedef prstatus_t gdb_lwpstatus_t; |
372 | #endif /* NEW_PROC_API */ | |
c906108c | 373 | |
c3f6f71d JM |
374 | typedef struct procinfo { |
375 | struct procinfo *next; | |
376 | int pid; /* Process ID */ | |
377 | int tid; /* Thread/LWP id */ | |
c906108c | 378 | |
c3f6f71d JM |
379 | /* process state */ |
380 | int was_stopped; | |
381 | int ignore_next_sigstop; | |
c906108c | 382 | |
19958708 | 383 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
384 | several different fd's, depending on the version of /proc |
385 | (old ioctl or new read/write). */ | |
c906108c | 386 | |
c3f6f71d | 387 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
388 | |
389 | /* The next three file descriptors are actually only needed in the | |
390 | read/write, multiple-file-descriptor implemenation | |
391 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
392 | code, we will use them uniformly by (in the case of the ioctl | |
393 | single-file-descriptor implementation) filling them with copies | |
394 | of the control fd. */ | |
c3f6f71d JM |
395 | int status_fd; /* File descriptor for /proc status file */ |
396 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 397 | |
c3f6f71d | 398 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 399 | |
c3f6f71d | 400 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
401 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
402 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
403 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
404 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 405 | |
c3f6f71d | 406 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 407 | |
c3f6f71d JM |
408 | #ifndef NEW_PROC_API |
409 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 410 | #endif |
37de36c6 KB |
411 | |
412 | #ifdef DYNAMIC_SYSCALLS | |
413 | int num_syscalls; /* Total number of syscalls */ | |
414 | char **syscall_names; /* Syscall number to name map */ | |
415 | #endif | |
19958708 | 416 | |
c3f6f71d | 417 | struct procinfo *thread_list; |
c906108c | 418 | |
c3f6f71d JM |
419 | int status_valid : 1; |
420 | int gregs_valid : 1; | |
421 | int fpregs_valid : 1; | |
422 | int threads_valid: 1; | |
423 | } procinfo; | |
c906108c | 424 | |
c3f6f71d | 425 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 426 | |
c3f6f71d | 427 | /* Function prototypes for procinfo module: */ |
c906108c | 428 | |
a14ed312 KB |
429 | static procinfo *find_procinfo_or_die (int pid, int tid); |
430 | static procinfo *find_procinfo (int pid, int tid); | |
431 | static procinfo *create_procinfo (int pid, int tid); | |
432 | static void destroy_procinfo (procinfo * p); | |
004527cb | 433 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
434 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
435 | static int open_procinfo_files (procinfo * p, int which); | |
436 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
437 | static int sysset_t_size (procinfo *p); |
438 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
439 | #ifdef DYNAMIC_SYSCALLS | |
440 | static void load_syscalls (procinfo *pi); | |
441 | static void free_syscalls (procinfo *pi); | |
442 | static int find_syscall (procinfo *pi, char *name); | |
443 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 444 | |
e9ef4f39 | 445 | static int iterate_over_mappings |
b8edc417 JK |
446 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
447 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 448 | void *data)); |
e9ef4f39 | 449 | |
c3f6f71d JM |
450 | /* The head of the procinfo list: */ |
451 | static procinfo * procinfo_list; | |
c906108c | 452 | |
77382aee PA |
453 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
454 | not found. */ | |
c906108c | 455 | |
19958708 | 456 | static procinfo * |
fba45db2 | 457 | find_procinfo (int pid, int tid) |
c5aa993b | 458 | { |
c3f6f71d | 459 | procinfo *pi; |
c906108c | 460 | |
c3f6f71d JM |
461 | for (pi = procinfo_list; pi; pi = pi->next) |
462 | if (pi->pid == pid) | |
463 | break; | |
c906108c | 464 | |
c3f6f71d JM |
465 | if (pi) |
466 | if (tid) | |
467 | { | |
468 | /* Don't check threads_valid. If we're updating the | |
469 | thread_list, we want to find whatever threads are already | |
470 | here. This means that in general it is the caller's | |
471 | responsibility to check threads_valid and update before | |
472 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 473 | thread. */ |
c3f6f71d JM |
474 | |
475 | for (pi = pi->thread_list; pi; pi = pi->next) | |
476 | if (pi->tid == tid) | |
477 | break; | |
478 | } | |
c906108c | 479 | |
c3f6f71d JM |
480 | return pi; |
481 | } | |
c906108c | 482 | |
77382aee | 483 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 484 | |
c3f6f71d | 485 | static procinfo * |
fba45db2 | 486 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
487 | { |
488 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 489 | |
c3f6f71d | 490 | if (pi == NULL) |
0fda6bd2 JM |
491 | { |
492 | if (tid) | |
3e43a32a MS |
493 | error (_("procfs: couldn't find pid %d " |
494 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
495 | pid, tid); |
496 | else | |
8a3fe4f8 | 497 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 498 | } |
c3f6f71d JM |
499 | return pi; |
500 | } | |
c906108c | 501 | |
77382aee PA |
502 | /* Wrapper for `open'. The appropriate open call is attempted; if |
503 | unsuccessful, it will be retried as many times as needed for the | |
504 | EAGAIN and EINTR conditions. | |
19958708 | 505 | |
77382aee PA |
506 | For other conditions, retry the open a limited number of times. In |
507 | addition, a short sleep is imposed prior to retrying the open. The | |
508 | reason for this sleep is to give the kernel a chance to catch up | |
509 | and create the file in question in the event that GDB "wins" the | |
510 | race to open a file before the kernel has created it. */ | |
19958708 | 511 | |
4d1bcd09 KB |
512 | static int |
513 | open_with_retry (const char *pathname, int flags) | |
514 | { | |
515 | int retries_remaining, status; | |
516 | ||
517 | retries_remaining = 2; | |
518 | ||
519 | while (1) | |
520 | { | |
521 | status = open (pathname, flags); | |
522 | ||
523 | if (status >= 0 || retries_remaining == 0) | |
524 | break; | |
525 | else if (errno != EINTR && errno != EAGAIN) | |
526 | { | |
527 | retries_remaining--; | |
528 | sleep (1); | |
529 | } | |
530 | } | |
531 | ||
532 | return status; | |
533 | } | |
534 | ||
77382aee PA |
535 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
536 | is defined, we only open the control file descriptor; the others | |
537 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
538 | there is only one real file descriptor, but we keep multiple copies | |
539 | of it so that the code that uses them does not have to be #ifdef'd. | |
540 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 541 | |
c3f6f71d | 542 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 543 | |
c3f6f71d | 544 | static int |
fba45db2 | 545 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 546 | { |
0fda6bd2 | 547 | #ifdef NEW_PROC_API |
c3f6f71d | 548 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 549 | #endif |
c3f6f71d JM |
550 | int fd; |
551 | ||
77382aee PA |
552 | /* This function is getting ALMOST long enough to break up into |
553 | several. Here is some rationale: | |
554 | ||
555 | NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
556 | There are several file descriptors that may need to be open | |
557 | for any given process or LWP. The ones we're intereted in are: | |
558 | - control (ctl) write-only change the state | |
559 | - status (status) read-only query the state | |
560 | - address space (as) read/write access memory | |
561 | - map (map) read-only virtual addr map | |
562 | Most of these are opened lazily as they are needed. | |
563 | The pathnames for the 'files' for an LWP look slightly | |
564 | different from those of a first-class process: | |
565 | Pathnames for a process (<proc-id>): | |
566 | /proc/<proc-id>/ctl | |
567 | /proc/<proc-id>/status | |
568 | /proc/<proc-id>/as | |
569 | /proc/<proc-id>/map | |
570 | Pathnames for an LWP (lwp-id): | |
571 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
572 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
573 | An LWP has no map or address space file descriptor, since | |
574 | the memory map and address space are shared by all LWPs. | |
575 | ||
576 | Everyone else (Solaris 2.5, Irix, OSF) | |
577 | There is only one file descriptor for each process or LWP. | |
578 | For convenience, we copy the same file descriptor into all | |
579 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
580 | as_fd, see NEW_PROC_API above) so that code that uses them | |
581 | doesn't need any #ifdef's. | |
582 | Pathname for all: | |
583 | /proc/<proc-id> | |
584 | ||
585 | Solaris 2.5 LWP's: | |
586 | Each LWP has an independent file descriptor, but these | |
587 | are not obtained via the 'open' system call like the rest: | |
588 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
589 | to the file descriptor of the parent process. | |
590 | ||
591 | OSF threads: | |
592 | These do not even have their own independent file descriptor. | |
593 | All operations are carried out on the file descriptor of the | |
594 | parent process. Therefore we just call open again for each | |
0df8b418 | 595 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
596 | |
597 | #ifdef NEW_PROC_API | |
77382aee PA |
598 | /* In this case, there are several different file descriptors that |
599 | we might be asked to open. The control file descriptor will be | |
600 | opened early, but the others will be opened lazily as they are | |
601 | needed. */ | |
c3f6f71d JM |
602 | |
603 | strcpy (tmp, pi->pathname); | |
0df8b418 | 604 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
605 | case FD_CTL: |
606 | if (pi->tid) | |
607 | strcat (tmp, "/lwpctl"); | |
608 | else | |
609 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 610 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 611 | if (fd < 0) |
c3f6f71d JM |
612 | return 0; /* fail */ |
613 | pi->ctl_fd = fd; | |
614 | break; | |
615 | case FD_AS: | |
616 | if (pi->tid) | |
0df8b418 | 617 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 618 | strcat (tmp, "/as"); |
4d1bcd09 | 619 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 620 | if (fd < 0) |
c3f6f71d JM |
621 | return 0; /* fail */ |
622 | pi->as_fd = fd; | |
623 | break; | |
624 | case FD_STATUS: | |
625 | if (pi->tid) | |
626 | strcat (tmp, "/lwpstatus"); | |
627 | else | |
628 | strcat (tmp, "/status"); | |
4d1bcd09 | 629 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 630 | if (fd < 0) |
c3f6f71d JM |
631 | return 0; /* fail */ |
632 | pi->status_fd = fd; | |
633 | break; | |
634 | default: | |
635 | return 0; /* unknown file descriptor */ | |
636 | } | |
637 | #else /* not NEW_PROC_API */ | |
77382aee PA |
638 | /* In this case, there is only one file descriptor for each procinfo |
639 | (ie. each process or LWP). In fact, only the file descriptor for | |
640 | the process can actually be opened by an 'open' system call. The | |
641 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
642 | process's file descriptor. | |
643 | ||
644 | For convenience, we copy each procinfo's single file descriptor | |
645 | into all of the fields occupied by the several file descriptors | |
646 | of the NEW_PROC_API implementation. That way, the code that uses | |
647 | them can be written without ifdefs. */ | |
c3f6f71d JM |
648 | |
649 | ||
650 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 651 | /* Only one FD; just open it. */ |
e28cade7 | 652 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 653 | return 0; |
0df8b418 | 654 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
655 | if (pi->tid == 0) /* Master procinfo for the process */ |
656 | { | |
4d1bcd09 | 657 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 658 | if (fd < 0) |
c3f6f71d JM |
659 | return 0; /* fail */ |
660 | } | |
661 | else /* LWP thread procinfo */ | |
662 | { | |
663 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
664 | procinfo *process; | |
665 | int lwpid = pi->tid; | |
666 | ||
0df8b418 | 667 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
668 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
669 | return 0; /* fail */ | |
670 | ||
0df8b418 | 671 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 672 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 673 | return 0; /* fail */ |
0df8b418 MS |
674 | #else /* Irix, other? */ |
675 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
676 | #endif /* Sol 2.5 PIOCOPENLWP */ |
677 | } | |
678 | #endif /* OSF PIOCTSTATUS */ | |
679 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
680 | #endif /* NEW_PROC_API */ | |
c906108c | 681 | |
c3f6f71d JM |
682 | return 1; /* success */ |
683 | } | |
c906108c | 684 | |
77382aee PA |
685 | /* Allocate a data structure and link it into the procinfo list. |
686 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
687 | pointer to new procinfo struct. */ | |
c906108c | 688 | |
c3f6f71d | 689 | static procinfo * |
fba45db2 | 690 | create_procinfo (int pid, int tid) |
c3f6f71d | 691 | { |
0b62613e | 692 | procinfo *pi, *parent = NULL; |
c906108c | 693 | |
0d06e24b | 694 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 695 | return pi; /* Already exists, nothing to do. */ |
c906108c | 696 | |
0df8b418 | 697 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
698 | if (tid != 0) |
699 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
700 | create it if it | |
0df8b418 | 701 | doesn't exist yet? */ |
c906108c | 702 | |
c3f6f71d JM |
703 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
704 | memset (pi, 0, sizeof (procinfo)); | |
705 | pi->pid = pid; | |
706 | pi->tid = tid; | |
c906108c | 707 | |
37de36c6 KB |
708 | #ifdef DYNAMIC_SYSCALLS |
709 | load_syscalls (pi); | |
710 | #endif | |
711 | ||
1d5e0602 KB |
712 | pi->saved_entryset = sysset_t_alloc (pi); |
713 | pi->saved_exitset = sysset_t_alloc (pi); | |
714 | ||
c3f6f71d JM |
715 | /* Chain into list. */ |
716 | if (tid == 0) | |
717 | { | |
718 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
719 | pi->next = procinfo_list; | |
720 | procinfo_list = pi; | |
721 | } | |
722 | else | |
723 | { | |
724 | #ifdef NEW_PROC_API | |
725 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
726 | #else | |
727 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
728 | #endif | |
729 | pi->next = parent->thread_list; | |
730 | parent->thread_list = pi; | |
731 | } | |
732 | return pi; | |
733 | } | |
c906108c | 734 | |
77382aee | 735 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 736 | |
c3f6f71d | 737 | static void |
fba45db2 | 738 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
739 | { |
740 | if (pi->ctl_fd > 0) | |
741 | close (pi->ctl_fd); | |
742 | #ifdef NEW_PROC_API | |
743 | if (pi->as_fd > 0) | |
744 | close (pi->as_fd); | |
745 | if (pi->status_fd > 0) | |
746 | close (pi->status_fd); | |
747 | #endif | |
748 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
749 | } | |
c906108c | 750 | |
77382aee | 751 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 752 | |
c3f6f71d | 753 | static void |
fba45db2 | 754 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
755 | { |
756 | procinfo *ptr; | |
757 | ||
77382aee | 758 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
759 | if (pi == *list) |
760 | *list = pi->next; | |
19958708 | 761 | else |
c3f6f71d JM |
762 | for (ptr = *list; ptr; ptr = ptr->next) |
763 | if (ptr->next == pi) | |
764 | { | |
765 | ptr->next = pi->next; | |
766 | break; | |
767 | } | |
7a292a7a | 768 | |
77382aee | 769 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 770 | close_procinfo_files (pi); |
7a292a7a | 771 | |
77382aee | 772 | /* Step three: free the memory. */ |
37de36c6 KB |
773 | #ifdef DYNAMIC_SYSCALLS |
774 | free_syscalls (pi); | |
775 | #endif | |
1d5e0602 KB |
776 | xfree (pi->saved_entryset); |
777 | xfree (pi->saved_exitset); | |
b8c9b27d | 778 | xfree (pi); |
c3f6f71d | 779 | } |
c906108c | 780 | |
c3f6f71d | 781 | static void |
fba45db2 | 782 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
783 | { |
784 | procinfo *tmp; | |
c906108c | 785 | |
0df8b418 | 786 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 787 | { |
0df8b418 | 788 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
789 | destroy_one_procinfo (&tmp->thread_list, pi); |
790 | } | |
0df8b418 | 791 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
792 | { |
793 | /* First destroy the children, if any; */ | |
794 | while (pi->thread_list != NULL) | |
795 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
796 | /* Then destroy the parent. Genocide!!! */ | |
797 | destroy_one_procinfo (&procinfo_list, pi); | |
798 | } | |
799 | } | |
c906108c | 800 | |
004527cb AC |
801 | static void |
802 | do_destroy_procinfo_cleanup (void *pi) | |
803 | { | |
804 | destroy_procinfo (pi); | |
805 | } | |
806 | ||
c3f6f71d | 807 | enum { NOKILL, KILL }; |
c906108c | 808 | |
77382aee PA |
809 | /* To be called on a non_recoverable error for a procinfo. Prints |
810 | error messages, optionally sends a SIGKILL to the process, then | |
811 | destroys the data structure. */ | |
c906108c | 812 | |
c3f6f71d | 813 | static void |
fba45db2 | 814 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
815 | { |
816 | char procfile[80]; | |
c906108c | 817 | |
c3f6f71d JM |
818 | if (pi->pathname) |
819 | { | |
820 | print_sys_errmsg (pi->pathname, errno); | |
821 | } | |
822 | else | |
823 | { | |
824 | sprintf (procfile, "process %d", pi->pid); | |
825 | print_sys_errmsg (procfile, errno); | |
826 | } | |
827 | if (kill_p == KILL) | |
828 | kill (pi->pid, SIGKILL); | |
c906108c | 829 | |
c3f6f71d | 830 | destroy_procinfo (pi); |
0b62613e | 831 | error ("%s", msg); |
c3f6f71d | 832 | } |
c906108c | 833 | |
77382aee PA |
834 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
835 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
836 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
837 | |
838 | static int | |
839 | sysset_t_size (procinfo * pi) | |
840 | { | |
841 | #ifndef DYNAMIC_SYSCALLS | |
842 | return sizeof (sysset_t); | |
843 | #else | |
844 | return sizeof (sysset_t) - sizeof (uint64_t) | |
845 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
846 | / (8 * sizeof (uint64_t))); | |
847 | #endif | |
848 | } | |
849 | ||
77382aee | 850 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
851 | |
852 | static sysset_t * | |
853 | sysset_t_alloc (procinfo * pi) | |
854 | { | |
855 | sysset_t *ret; | |
856 | int size = sysset_t_size (pi); | |
f4a14ae6 | 857 | |
37de36c6 KB |
858 | ret = xmalloc (size); |
859 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
860 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
861 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
862 | #endif |
863 | return ret; | |
864 | } | |
865 | ||
866 | #ifdef DYNAMIC_SYSCALLS | |
867 | ||
77382aee | 868 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
869 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
870 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 871 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
872 | |
873 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
874 | #define MAX_SYSCALLS 65536 | |
875 | ||
876 | static void | |
877 | load_syscalls (procinfo *pi) | |
878 | { | |
879 | char pathname[MAX_PROC_NAME_SIZE]; | |
880 | int sysent_fd; | |
881 | prsysent_t header; | |
882 | prsyscall_t *syscalls; | |
883 | int i, size, maxcall; | |
e28cade7 | 884 | struct cleanup *cleanups; |
37de36c6 KB |
885 | |
886 | pi->num_syscalls = 0; | |
887 | pi->syscall_names = 0; | |
888 | ||
77382aee | 889 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 890 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 891 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
892 | if (sysent_fd < 0) |
893 | { | |
8a3fe4f8 | 894 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 895 | } |
e28cade7 | 896 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
897 | |
898 | size = sizeof header - sizeof (prsyscall_t); | |
899 | if (read (sysent_fd, &header, size) != size) | |
900 | { | |
8a3fe4f8 | 901 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
902 | } |
903 | ||
904 | if (header.pr_nsyscalls == 0) | |
905 | { | |
3e43a32a MS |
906 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
907 | pi->pid); | |
37de36c6 KB |
908 | } |
909 | ||
910 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
911 | syscalls = xmalloc (size); | |
e28cade7 | 912 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
913 | |
914 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 915 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
916 | |
917 | /* Find maximum syscall number. This may not be the same as | |
918 | pr_nsyscalls since that value refers to the number of entries | |
919 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 920 | call numbers may be skipped.) */ |
37de36c6 KB |
921 | |
922 | maxcall = syscalls[0].pr_number; | |
923 | ||
924 | for (i = 1; i < header.pr_nsyscalls; i++) | |
925 | if (syscalls[i].pr_number > maxcall | |
77382aee | 926 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
927 | && syscalls[i].pr_number < MAX_SYSCALLS) |
928 | maxcall = syscalls[i].pr_number; | |
929 | ||
930 | pi->num_syscalls = maxcall+1; | |
931 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
932 | ||
933 | for (i = 0; i < pi->num_syscalls; i++) | |
934 | pi->syscall_names[i] = NULL; | |
935 | ||
77382aee | 936 | /* Read the syscall names in. */ |
37de36c6 KB |
937 | for (i = 0; i < header.pr_nsyscalls; i++) |
938 | { | |
939 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
940 | int nread; | |
941 | int callnum; | |
942 | ||
943 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 944 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
945 | || syscalls[i].pr_nameoff <= 0 |
946 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 947 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
948 | continue; |
949 | ||
950 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
951 | if (nread <= 0) | |
952 | continue; | |
953 | ||
954 | callnum = syscalls[i].pr_number; | |
955 | ||
956 | if (pi->syscall_names[callnum] != NULL) | |
957 | { | |
0df8b418 | 958 | /* FIXME: Generate warning. */ |
37de36c6 KB |
959 | continue; |
960 | } | |
961 | ||
962 | namebuf[nread-1] = '\0'; | |
963 | size = strlen (namebuf) + 1; | |
964 | pi->syscall_names[callnum] = xmalloc (size); | |
965 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
966 | pi->syscall_names[callnum][size-1] = '\0'; | |
967 | } | |
19958708 | 968 | |
e28cade7 | 969 | do_cleanups (cleanups); |
37de36c6 KB |
970 | } |
971 | ||
77382aee | 972 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
973 | structure. */ |
974 | ||
975 | static void | |
976 | free_syscalls (procinfo *pi) | |
977 | { | |
978 | if (pi->syscall_names) | |
979 | { | |
980 | int i; | |
981 | ||
982 | for (i = 0; i < pi->num_syscalls; i++) | |
983 | if (pi->syscall_names[i] != NULL) | |
984 | xfree (pi->syscall_names[i]); | |
985 | ||
986 | xfree (pi->syscall_names); | |
987 | pi->syscall_names = 0; | |
988 | } | |
989 | } | |
990 | ||
77382aee | 991 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 992 | If no match is found, return -1. */ |
19958708 | 993 | |
37de36c6 KB |
994 | static int |
995 | find_syscall (procinfo *pi, char *name) | |
996 | { | |
997 | int i; | |
f4a14ae6 | 998 | |
37de36c6 KB |
999 | for (i = 0; i < pi->num_syscalls; i++) |
1000 | { | |
1001 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1002 | return i; | |
1003 | } | |
1004 | return -1; | |
1005 | } | |
1006 | #endif | |
1007 | ||
c3f6f71d | 1008 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1009 | |
c3f6f71d | 1010 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1011 | |
77382aee PA |
1012 | /* This "module" is the interface layer between the /proc system API |
1013 | and the gdb target vector functions. This layer consists of access | |
1014 | functions that encapsulate each of the basic operations that we | |
1015 | need to use from the /proc API. | |
1016 | ||
1017 | The main motivation for this layer is to hide the fact that there | |
1018 | are two very different implementations of the /proc API. Rather | |
1019 | than have a bunch of #ifdefs all thru the gdb target vector | |
1020 | functions, we do our best to hide them all in here. */ | |
c906108c | 1021 | |
a14ed312 KB |
1022 | int proc_get_status (procinfo * pi); |
1023 | long proc_flags (procinfo * pi); | |
1024 | int proc_why (procinfo * pi); | |
1025 | int proc_what (procinfo * pi); | |
1026 | int proc_set_run_on_last_close (procinfo * pi); | |
1027 | int proc_unset_run_on_last_close (procinfo * pi); | |
1028 | int proc_set_inherit_on_fork (procinfo * pi); | |
1029 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1030 | int proc_set_async (procinfo * pi); | |
1031 | int proc_unset_async (procinfo * pi); | |
1032 | int proc_stop_process (procinfo * pi); | |
1033 | int proc_trace_signal (procinfo * pi, int signo); | |
1034 | int proc_ignore_signal (procinfo * pi, int signo); | |
1035 | int proc_clear_current_fault (procinfo * pi); | |
1036 | int proc_set_current_signal (procinfo * pi, int signo); | |
1037 | int proc_clear_current_signal (procinfo * pi); | |
1038 | int proc_set_gregs (procinfo * pi); | |
1039 | int proc_set_fpregs (procinfo * pi); | |
1040 | int proc_wait_for_stop (procinfo * pi); | |
1041 | int proc_run_process (procinfo * pi, int step, int signo); | |
1042 | int proc_kill (procinfo * pi, int signo); | |
1043 | int proc_parent_pid (procinfo * pi); | |
1044 | int proc_get_nthreads (procinfo * pi); | |
1045 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1046 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1047 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1048 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1049 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1050 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1051 | |
1052 | int proc_update_threads (procinfo * pi); | |
1053 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1054 | int (*func) (procinfo *, procinfo *, void *), |
1055 | void *ptr); | |
a14ed312 KB |
1056 | |
1057 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1058 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1059 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1060 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1061 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1062 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1063 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1064 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
3e43a32a MS |
1065 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, |
1066 | gdb_sigaction_t *save); | |
a14ed312 KB |
1067 | |
1068 | void proc_warn (procinfo * pi, char *func, int line); | |
1069 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1070 | |
c3f6f71d | 1071 | void |
fba45db2 | 1072 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1073 | { |
1074 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1075 | print_sys_errmsg (errmsg, errno); | |
1076 | } | |
c906108c | 1077 | |
c3f6f71d | 1078 | void |
fba45db2 | 1079 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1080 | { |
1081 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1082 | perror_with_name (errmsg); | |
1083 | } | |
c906108c | 1084 | |
77382aee PA |
1085 | /* Updates the status struct in the procinfo. There is a 'valid' |
1086 | flag, to let other functions know when this function needs to be | |
1087 | called (so the status is only read when it is needed). The status | |
1088 | file descriptor is also only opened when it is needed. Returns | |
1089 | non-zero for success, zero for failure. */ | |
c906108c | 1090 | |
c3f6f71d | 1091 | int |
fba45db2 | 1092 | proc_get_status (procinfo *pi) |
c3f6f71d | 1093 | { |
0df8b418 | 1094 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1095 | if (pi->status_fd == 0 && |
1096 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1097 | { | |
1098 | pi->status_valid = 0; | |
1099 | return 0; | |
1100 | } | |
c906108c | 1101 | |
c3f6f71d JM |
1102 | #ifdef NEW_PROC_API |
1103 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1104 | pi->status_valid = 0; /* fail */ | |
1105 | else | |
1106 | { | |
19958708 | 1107 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1108 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1109 | if (pi->tid) |
19958708 RM |
1110 | pi->status_valid = (read (pi->status_fd, |
1111 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1112 | sizeof (lwpstatus_t)) |
1113 | == sizeof (lwpstatus_t)); | |
1114 | else | |
1115 | { | |
19958708 | 1116 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1117 | (char *) &pi->prstatus, |
1118 | sizeof (gdb_prstatus_t)) | |
1119 | == sizeof (gdb_prstatus_t)); | |
1120 | #if 0 /*def UNIXWARE*/ | |
1121 | if (pi->status_valid && | |
1122 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1123 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
0df8b418 | 1124 | /* Unixware peculiarity -- read the damn thing again! */ |
19958708 | 1125 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1126 | (char *) &pi->prstatus, |
1127 | sizeof (gdb_prstatus_t)) | |
1128 | == sizeof (gdb_prstatus_t)); | |
1129 | #endif /* UNIXWARE */ | |
1130 | } | |
1131 | } | |
1132 | #else /* ioctl method */ | |
1133 | #ifdef PIOCTSTATUS /* osf */ | |
1134 | if (pi->tid == 0) /* main process */ | |
1135 | { | |
0df8b418 | 1136 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1137 | pi->status_valid = |
c3f6f71d JM |
1138 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | int win; | |
1143 | struct { | |
1144 | long pr_count; | |
1145 | tid_t pr_error_thread; | |
1146 | struct prstatus status; | |
1147 | } thread_status; | |
1148 | ||
1149 | thread_status.pr_count = 1; | |
1150 | thread_status.status.pr_tid = pi->tid; | |
1151 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1152 | if (win) | |
1153 | { | |
19958708 | 1154 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1155 | sizeof (pi->prstatus)); |
1156 | pi->status_valid = 1; | |
1157 | } | |
1158 | } | |
1159 | #else | |
77382aee | 1160 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1161 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1162 | #endif | |
1163 | #endif | |
c906108c | 1164 | |
c3f6f71d JM |
1165 | if (pi->status_valid) |
1166 | { | |
19958708 | 1167 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1168 | proc_why (pi), |
19958708 | 1169 | proc_what (pi), |
c3f6f71d JM |
1170 | proc_get_current_thread (pi)); |
1171 | } | |
c906108c | 1172 | |
77382aee | 1173 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1174 | pi->gregs_valid = pi->status_valid; |
1175 | #ifdef NEW_PROC_API | |
77382aee PA |
1176 | /* In the read/write multiple-fd model, the status struct includes |
1177 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1178 | pi->fpregs_valid = pi->status_valid; |
1179 | #endif | |
77382aee | 1180 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1181 | } |
c906108c | 1182 | |
77382aee | 1183 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d JM |
1184 | |
1185 | long | |
fba45db2 | 1186 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1187 | { |
1188 | if (!pi->status_valid) | |
1189 | if (!proc_get_status (pi)) | |
0df8b418 | 1190 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1191 | |
c3f6f71d | 1192 | #ifdef NEW_PROC_API |
0d06e24b JM |
1193 | # ifdef UNIXWARE |
1194 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1195 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1196 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1197 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1198 | # else | |
c3f6f71d | 1199 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1200 | # endif |
c3f6f71d JM |
1201 | #else |
1202 | return pi->prstatus.pr_flags; | |
1203 | #endif | |
1204 | } | |
c906108c | 1205 | |
77382aee | 1206 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1207 | |
c3f6f71d | 1208 | int |
fba45db2 | 1209 | proc_why (procinfo *pi) |
c3f6f71d JM |
1210 | { |
1211 | if (!pi->status_valid) | |
1212 | if (!proc_get_status (pi)) | |
0df8b418 | 1213 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1214 | |
c3f6f71d JM |
1215 | #ifdef NEW_PROC_API |
1216 | return pi->prstatus.pr_lwp.pr_why; | |
1217 | #else | |
1218 | return pi->prstatus.pr_why; | |
1219 | #endif | |
1220 | } | |
c906108c | 1221 | |
77382aee | 1222 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1223 | |
c3f6f71d | 1224 | int |
fba45db2 | 1225 | proc_what (procinfo *pi) |
c3f6f71d JM |
1226 | { |
1227 | if (!pi->status_valid) | |
1228 | if (!proc_get_status (pi)) | |
0df8b418 | 1229 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1230 | |
c3f6f71d JM |
1231 | #ifdef NEW_PROC_API |
1232 | return pi->prstatus.pr_lwp.pr_what; | |
1233 | #else | |
1234 | return pi->prstatus.pr_what; | |
c906108c | 1235 | #endif |
c3f6f71d | 1236 | } |
c906108c | 1237 | |
77382aee PA |
1238 | /* This function is only called when PI is stopped by a watchpoint. |
1239 | Assuming the OS supports it, write to *ADDR the data address which | |
1240 | triggered it and return 1. Return 0 if it is not possible to know | |
1241 | the address. */ | |
bf701c2c PM |
1242 | |
1243 | static int | |
1244 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1245 | { | |
1246 | if (!pi->status_valid) | |
1247 | if (!proc_get_status (pi)) | |
1248 | return 0; | |
1249 | ||
1250 | #ifdef NEW_PROC_API | |
1251 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1252 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1253 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1254 | #else | |
1255 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1256 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1257 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1258 | #endif | |
1259 | return 1; | |
1260 | } | |
1261 | ||
c3f6f71d | 1262 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1263 | |
1264 | /* Returns the pr_nsysarg field (number of args to the current | |
1265 | syscall). */ | |
c3f6f71d JM |
1266 | |
1267 | int | |
fba45db2 | 1268 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1269 | { |
1270 | if (!pi->status_valid) | |
1271 | if (!proc_get_status (pi)) | |
1272 | return 0; | |
19958708 | 1273 | |
c3f6f71d JM |
1274 | #ifdef NEW_PROC_API |
1275 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1276 | #else | |
1277 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1278 | #endif |
c3f6f71d | 1279 | } |
c906108c | 1280 | |
77382aee PA |
1281 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1282 | syscall). */ | |
c906108c | 1283 | |
c3f6f71d | 1284 | long * |
fba45db2 | 1285 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1286 | { |
1287 | if (!pi->status_valid) | |
1288 | if (!proc_get_status (pi)) | |
1289 | return NULL; | |
19958708 | 1290 | |
c3f6f71d JM |
1291 | #ifdef NEW_PROC_API |
1292 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1293 | #else | |
1294 | return (long *) &pi->prstatus.pr_sysarg; | |
1295 | #endif | |
1296 | } | |
c906108c | 1297 | |
77382aee PA |
1298 | /* Returns the pr_syscall field (id of current syscall if we are in |
1299 | one). */ | |
c906108c | 1300 | |
c3f6f71d | 1301 | int |
fba45db2 | 1302 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1303 | { |
1304 | if (!pi->status_valid) | |
1305 | if (!proc_get_status (pi)) | |
1306 | return 0; | |
19958708 | 1307 | |
c3f6f71d JM |
1308 | #ifdef NEW_PROC_API |
1309 | return pi->prstatus.pr_lwp.pr_syscall; | |
1310 | #else | |
1311 | return pi->prstatus.pr_syscall; | |
1312 | #endif | |
1313 | } | |
1314 | #endif /* PIOCSSPCACT */ | |
c906108c | 1315 | |
77382aee | 1316 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1317 | |
c3f6f71d JM |
1318 | long |
1319 | proc_cursig (struct procinfo *pi) | |
1320 | { | |
1321 | if (!pi->status_valid) | |
1322 | if (!proc_get_status (pi)) | |
0df8b418 | 1323 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1324 | |
c3f6f71d JM |
1325 | #ifdef NEW_PROC_API |
1326 | return pi->prstatus.pr_lwp.pr_cursig; | |
1327 | #else | |
1328 | return pi->prstatus.pr_cursig; | |
1329 | #endif | |
1330 | } | |
c906108c | 1331 | |
77382aee PA |
1332 | /* === I appologize for the messiness of this function. |
1333 | === This is an area where the different versions of | |
1334 | === /proc are more inconsistent than usual. | |
1335 | ||
1336 | Set or reset any of the following process flags: | |
1337 | PR_FORK -- forked child will inherit trace flags | |
1338 | PR_RLC -- traced process runs when last /proc file closed. | |
1339 | PR_KLC -- traced process is killed when last /proc file closed. | |
1340 | PR_ASYNC -- LWP's get to run/stop independently. | |
1341 | ||
1342 | There are three methods for doing this function: | |
1343 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1344 | [Sol6, Sol7, UW] | |
1345 | 2) Middle: PIOCSET/PIOCRESET | |
1346 | [Irix, Sol5] | |
1347 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1348 | [OSF, Sol5] | |
1349 | ||
1350 | Note: Irix does not define PR_ASYNC. | |
1351 | Note: OSF does not define PR_KLC. | |
1352 | Note: OSF is the only one that can ONLY use the oldest method. | |
1353 | ||
1354 | Arguments: | |
1355 | pi -- the procinfo | |
1356 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1357 | mode -- 1 for set, 0 for reset. | |
1358 | ||
1359 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1360 | |
c3f6f71d | 1361 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1362 | |
c3f6f71d | 1363 | static int |
fba45db2 | 1364 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1365 | { |
1366 | long win = 0; /* default to fail */ | |
1367 | ||
77382aee PA |
1368 | /* These operations affect the process as a whole, and applying them |
1369 | to an individual LWP has the same meaning as applying them to the | |
1370 | main process. Therefore, if we're ever called with a pointer to | |
1371 | an LWP's procinfo, let's substitute the process's procinfo and | |
1372 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1373 | |
1374 | if (pi->pid != 0) | |
1375 | pi = find_procinfo_or_die (pi->pid, 0); | |
1376 | ||
0df8b418 | 1377 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii. */ |
19958708 | 1378 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1379 | (which for no obvious reason has a different definition |
1380 | from one operating system to the next...) */ | |
1381 | #ifdef PCUNSET | |
1382 | #define GDBRESET PCUNSET | |
37de36c6 | 1383 | #else |
c3f6f71d JM |
1384 | #ifdef PCRESET |
1385 | #define GDBRESET PCRESET | |
37de36c6 | 1386 | #endif |
c906108c | 1387 | #endif |
c3f6f71d | 1388 | { |
37de36c6 | 1389 | procfs_ctl_t arg[2]; |
c906108c | 1390 | |
0df8b418 | 1391 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1392 | arg[0] = PCSET; |
0df8b418 | 1393 | else /* Reset the flag. */ |
c3f6f71d | 1394 | arg[0] = GDBRESET; |
c5aa993b | 1395 | |
c3f6f71d JM |
1396 | arg[1] = flag; |
1397 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1398 | } | |
1399 | #else | |
1400 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1401 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1402 | { |
1403 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1404 | } | |
0df8b418 | 1405 | else /* Reset the flag. */ |
c3f6f71d JM |
1406 | { |
1407 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1408 | } | |
c906108c | 1409 | |
c3f6f71d JM |
1410 | #else |
1411 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1412 | switch (flag) { | |
1413 | case PR_RLC: | |
1414 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1415 | { | |
1416 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1417 | } | |
1418 | else /* Clear run-on-last-close */ | |
1419 | { | |
1420 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1421 | } | |
1422 | break; | |
1423 | case PR_FORK: | |
1424 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1425 | { | |
1426 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1427 | } | |
1428 | else /* Clear inherit-on-fork */ | |
1429 | { | |
1430 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1431 | } | |
1432 | break; | |
1433 | default: | |
0df8b418 | 1434 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1435 | break; |
1436 | } | |
1437 | #endif | |
1438 | #endif | |
1439 | #endif | |
1440 | #undef GDBRESET | |
77382aee PA |
1441 | /* The above operation renders the procinfo's cached pstatus |
1442 | obsolete. */ | |
c3f6f71d | 1443 | pi->status_valid = 0; |
c906108c | 1444 | |
c3f6f71d | 1445 | if (!win) |
8a3fe4f8 | 1446 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1447 | flag == PR_FORK ? "PR_FORK" : |
1448 | flag == PR_RLC ? "PR_RLC" : | |
1449 | #ifdef PR_ASYNC | |
1450 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1451 | #endif |
1452 | #ifdef PR_KLC | |
1453 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1454 | #endif |
1455 | "<unknown flag>", | |
1456 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1457 | |
c3f6f71d JM |
1458 | return win; |
1459 | } | |
c906108c | 1460 | |
77382aee PA |
1461 | /* Set the run_on_last_close flag. Process with all threads will |
1462 | become runnable when debugger closes all /proc fds. Returns | |
1463 | non-zero for success, zero for failure. */ | |
c906108c | 1464 | |
c3f6f71d | 1465 | int |
fba45db2 | 1466 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1467 | { |
c3f6f71d JM |
1468 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1469 | } | |
c906108c | 1470 | |
77382aee PA |
1471 | /* Reset the run_on_last_close flag. The process will NOT become |
1472 | runnable when debugger closes its file handles. Returns non-zero | |
1473 | for success, zero for failure. */ | |
c906108c | 1474 | |
c3f6f71d | 1475 | int |
fba45db2 | 1476 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1477 | { |
1478 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1479 | } |
1480 | ||
0d06e24b | 1481 | #ifdef PR_KLC |
77382aee PA |
1482 | /* Set the kill_on_last_close flag. Process with all threads will be |
1483 | killed when debugger closes all /proc fds (or debugger exits or | |
1484 | dies). Returns non-zero for success, zero for failure. */ | |
0d06e24b JM |
1485 | |
1486 | int | |
fba45db2 | 1487 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1488 | { |
1489 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1490 | } | |
1491 | ||
77382aee PA |
1492 | /* Reset the kill_on_last_close flag. Process will NOT be killed when |
1493 | debugger closes its file handles (or exits or dies). Returns | |
1494 | non-zero for success, zero for failure. */ | |
0d06e24b JM |
1495 | |
1496 | int | |
fba45db2 | 1497 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1498 | { |
1499 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1500 | } | |
1501 | #endif /* PR_KLC */ | |
1502 | ||
77382aee PA |
1503 | /* Set inherit_on_fork flag. If the process forks a child while we |
1504 | are registered for events in the parent, then we will also recieve | |
1505 | events from the child. Returns non-zero for success, zero for | |
1506 | failure. */ | |
c906108c | 1507 | |
c3f6f71d | 1508 | int |
fba45db2 | 1509 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1510 | { |
1511 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1512 | } | |
c5aa993b | 1513 | |
77382aee PA |
1514 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1515 | are registered for events in the parent, then we will NOT recieve | |
1516 | events from the child. Returns non-zero for success, zero for | |
1517 | failure. */ | |
c906108c | 1518 | |
c3f6f71d | 1519 | int |
fba45db2 | 1520 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1521 | { |
1522 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1523 | } | |
c906108c | 1524 | |
c3f6f71d | 1525 | #ifdef PR_ASYNC |
77382aee PA |
1526 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1527 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1528 | non-zero for success, zero for failure. */ | |
c906108c | 1529 | |
c3f6f71d | 1530 | int |
fba45db2 | 1531 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1532 | { |
1533 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1534 | } | |
c906108c | 1535 | |
77382aee PA |
1536 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1537 | (signal etc.), then all other LWPs will stop as well. Returns | |
1538 | non-zero for success, zero for failure. */ | |
c906108c | 1539 | |
c3f6f71d | 1540 | int |
fba45db2 | 1541 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1542 | { |
1543 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1544 | } | |
1545 | #endif /* PR_ASYNC */ | |
c906108c | 1546 | |
77382aee PA |
1547 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1548 | for success, zero for failure. */ | |
c906108c | 1549 | |
c3f6f71d | 1550 | int |
fba45db2 | 1551 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1552 | { |
1553 | int win; | |
c906108c | 1554 | |
77382aee PA |
1555 | /* We might conceivably apply this operation to an LWP, and the |
1556 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1557 | |
c3f6f71d JM |
1558 | if (pi->ctl_fd == 0 && |
1559 | open_procinfo_files (pi, FD_CTL) == 0) | |
1560 | return 0; | |
1561 | else | |
1562 | { | |
1563 | #ifdef NEW_PROC_API | |
37de36c6 | 1564 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1565 | |
c3f6f71d JM |
1566 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1567 | #else /* ioctl method */ | |
1568 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1569 | /* Note: the call also reads the prstatus. */ | |
1570 | if (win) | |
1571 | { | |
1572 | pi->status_valid = 1; | |
19958708 | 1573 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1574 | proc_why (pi), |
19958708 | 1575 | proc_what (pi), |
c3f6f71d JM |
1576 | proc_get_current_thread (pi)); |
1577 | } | |
1578 | #endif | |
1579 | } | |
c906108c | 1580 | |
c3f6f71d JM |
1581 | return win; |
1582 | } | |
c5aa993b | 1583 | |
77382aee PA |
1584 | /* Wait for the process or LWP to stop (block until it does). Returns |
1585 | non-zero for success, zero for failure. */ | |
c906108c | 1586 | |
c3f6f71d | 1587 | int |
fba45db2 | 1588 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1589 | { |
c3f6f71d JM |
1590 | int win; |
1591 | ||
77382aee PA |
1592 | /* We should never have to apply this operation to any procinfo |
1593 | except the one for the main process. If that ever changes for | |
1594 | any reason, then take out the following clause and replace it | |
1595 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1596 | |
c3f6f71d JM |
1597 | if (pi->tid != 0) |
1598 | pi = find_procinfo_or_die (pi->pid, 0); | |
1599 | ||
1600 | #ifdef NEW_PROC_API | |
1601 | { | |
37de36c6 | 1602 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1603 | |
c3f6f71d JM |
1604 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1605 | /* We been runnin' and we stopped -- need to update status. */ | |
1606 | pi->status_valid = 0; | |
1607 | } | |
1608 | #else /* ioctl method */ | |
1609 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1610 | /* Above call also refreshes the prstatus. */ | |
1611 | if (win) | |
1612 | { | |
1613 | pi->status_valid = 1; | |
19958708 | 1614 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1615 | proc_why (pi), |
19958708 | 1616 | proc_what (pi), |
c3f6f71d JM |
1617 | proc_get_current_thread (pi)); |
1618 | } | |
c906108c SS |
1619 | #endif |
1620 | ||
c3f6f71d | 1621 | return win; |
c906108c SS |
1622 | } |
1623 | ||
77382aee PA |
1624 | /* Make the process or LWP runnable. |
1625 | ||
1626 | Options (not all are implemented): | |
1627 | - single-step | |
1628 | - clear current fault | |
1629 | - clear current signal | |
1630 | - abort the current system call | |
1631 | - stop as soon as finished with system call | |
1632 | - (ioctl): set traced signal set | |
1633 | - (ioctl): set held signal set | |
1634 | - (ioctl): set traced fault set | |
1635 | - (ioctl): set start pc (vaddr) | |
1636 | ||
1637 | Always clears the current fault. PI is the process or LWP to | |
1638 | operate on. If STEP is true, set the process or LWP to trap after | |
1639 | one instruction. If SIGNO is zero, clear the current signal if | |
1640 | any; if non-zero, set the current signal to this one. Returns | |
1641 | non-zero for success, zero for failure. */ | |
c3f6f71d JM |
1642 | |
1643 | int | |
fba45db2 | 1644 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1645 | { |
1646 | int win; | |
1647 | int runflags; | |
1648 | ||
77382aee PA |
1649 | /* We will probably have to apply this operation to individual |
1650 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1651 | |
c3f6f71d JM |
1652 | if (pi->ctl_fd == 0 && |
1653 | open_procinfo_files (pi, FD_CTL) == 0) | |
1654 | { | |
1655 | return 0; | |
1656 | } | |
c906108c | 1657 | |
0df8b418 | 1658 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1659 | if (step) |
1660 | runflags |= PRSTEP; | |
1661 | if (signo == 0) | |
1662 | runflags |= PRCSIG; | |
0df8b418 | 1663 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1664 | proc_set_current_signal (pi, signo); |
c5aa993b | 1665 | |
c3f6f71d JM |
1666 | #ifdef NEW_PROC_API |
1667 | { | |
37de36c6 | 1668 | procfs_ctl_t cmd[2]; |
c906108c | 1669 | |
c3f6f71d JM |
1670 | cmd[0] = PCRUN; |
1671 | cmd[1] = runflags; | |
1672 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1673 | } | |
1674 | #else /* ioctl method */ | |
1675 | { | |
1676 | prrun_t prrun; | |
c906108c | 1677 | |
c3f6f71d JM |
1678 | memset (&prrun, 0, sizeof (prrun)); |
1679 | prrun.pr_flags = runflags; | |
1680 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1681 | } | |
1682 | #endif | |
c906108c | 1683 | |
c3f6f71d JM |
1684 | return win; |
1685 | } | |
c906108c | 1686 | |
77382aee PA |
1687 | /* Register to trace signals in the process or LWP. Returns non-zero |
1688 | for success, zero for failure. */ | |
c906108c | 1689 | |
c3f6f71d | 1690 | int |
37de36c6 | 1691 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1692 | { |
c3f6f71d JM |
1693 | int win; |
1694 | ||
77382aee PA |
1695 | /* We should never have to apply this operation to any procinfo |
1696 | except the one for the main process. If that ever changes for | |
1697 | any reason, then take out the following clause and replace it | |
1698 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1699 | |
c3f6f71d JM |
1700 | if (pi->tid != 0) |
1701 | pi = find_procinfo_or_die (pi->pid, 0); | |
1702 | ||
1703 | #ifdef NEW_PROC_API | |
1704 | { | |
1705 | struct { | |
37de36c6 | 1706 | procfs_ctl_t cmd; |
c3f6f71d | 1707 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1708 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1709 | } arg; |
c906108c | 1710 | |
c3f6f71d | 1711 | arg.cmd = PCSTRACE; |
37de36c6 | 1712 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1713 | |
c3f6f71d JM |
1714 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1715 | } | |
1716 | #else /* ioctl method */ | |
1717 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1718 | #endif | |
0df8b418 | 1719 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1720 | pi->status_valid = 0; |
c906108c | 1721 | |
c3f6f71d | 1722 | if (!win) |
8a3fe4f8 | 1723 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1724 | return win; |
c906108c SS |
1725 | } |
1726 | ||
77382aee PA |
1727 | /* Register to trace hardware faults in the process or LWP. Returns |
1728 | non-zero for success, zero for failure. */ | |
c906108c | 1729 | |
c3f6f71d | 1730 | int |
fba45db2 | 1731 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1732 | { |
1733 | int win; | |
1734 | ||
77382aee PA |
1735 | /* We should never have to apply this operation to any procinfo |
1736 | except the one for the main process. If that ever changes for | |
1737 | any reason, then take out the following clause and replace it | |
1738 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1739 | |
c3f6f71d JM |
1740 | if (pi->tid != 0) |
1741 | pi = find_procinfo_or_die (pi->pid, 0); | |
1742 | ||
1743 | #ifdef NEW_PROC_API | |
1744 | { | |
1745 | struct { | |
37de36c6 | 1746 | procfs_ctl_t cmd; |
c3f6f71d JM |
1747 | /* Use char array to avoid alignment issues. */ |
1748 | char fltset[sizeof (fltset_t)]; | |
1749 | } arg; | |
c906108c | 1750 | |
c3f6f71d JM |
1751 | arg.cmd = PCSFAULT; |
1752 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1753 | |
c3f6f71d JM |
1754 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1755 | } | |
1756 | #else /* ioctl method */ | |
1757 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1758 | #endif | |
0df8b418 | 1759 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1760 | pi->status_valid = 0; |
c906108c | 1761 | |
c3f6f71d JM |
1762 | return win; |
1763 | } | |
c5aa993b | 1764 | |
77382aee PA |
1765 | /* Register to trace entry to system calls in the process or LWP. |
1766 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1767 | |
c3f6f71d | 1768 | int |
fba45db2 | 1769 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1770 | { |
c3f6f71d JM |
1771 | int win; |
1772 | ||
77382aee PA |
1773 | /* We should never have to apply this operation to any procinfo |
1774 | except the one for the main process. If that ever changes for | |
1775 | any reason, then take out the following clause and replace it | |
1776 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1777 | |
c3f6f71d JM |
1778 | if (pi->tid != 0) |
1779 | pi = find_procinfo_or_die (pi->pid, 0); | |
1780 | ||
1781 | #ifdef NEW_PROC_API | |
1782 | { | |
37de36c6 KB |
1783 | struct gdb_proc_ctl_pcsentry { |
1784 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1785 | /* Use char array to avoid alignment issues. */ |
1786 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1787 | } *argp; |
1788 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1789 | - sizeof (sysset_t) |
37de36c6 | 1790 | + sysset_t_size (pi); |
c3f6f71d | 1791 | |
37de36c6 | 1792 | argp = xmalloc (argp_size); |
c3f6f71d | 1793 | |
37de36c6 KB |
1794 | argp->cmd = PCSENTRY; |
1795 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1796 | ||
1797 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1798 | xfree (argp); | |
c3f6f71d JM |
1799 | } |
1800 | #else /* ioctl method */ | |
1801 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1802 | #endif | |
77382aee PA |
1803 | /* The above operation renders the procinfo's cached pstatus |
1804 | obsolete. */ | |
c3f6f71d | 1805 | pi->status_valid = 0; |
19958708 | 1806 | |
c3f6f71d | 1807 | return win; |
c906108c SS |
1808 | } |
1809 | ||
77382aee PA |
1810 | /* Register to trace exit from system calls in the process or LWP. |
1811 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1812 | |
c3f6f71d | 1813 | int |
fba45db2 | 1814 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1815 | { |
1816 | int win; | |
1817 | ||
77382aee PA |
1818 | /* We should never have to apply this operation to any procinfo |
1819 | except the one for the main process. If that ever changes for | |
1820 | any reason, then take out the following clause and replace it | |
1821 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1822 | |
c3f6f71d JM |
1823 | if (pi->tid != 0) |
1824 | pi = find_procinfo_or_die (pi->pid, 0); | |
1825 | ||
1826 | #ifdef NEW_PROC_API | |
1827 | { | |
37de36c6 KB |
1828 | struct gdb_proc_ctl_pcsexit { |
1829 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1830 | /* Use char array to avoid alignment issues. */ |
1831 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1832 | } *argp; |
1833 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1834 | - sizeof (sysset_t) |
37de36c6 | 1835 | + sysset_t_size (pi); |
c906108c | 1836 | |
37de36c6 | 1837 | argp = xmalloc (argp_size); |
c906108c | 1838 | |
37de36c6 KB |
1839 | argp->cmd = PCSEXIT; |
1840 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1841 | ||
1842 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1843 | xfree (argp); | |
c3f6f71d JM |
1844 | } |
1845 | #else /* ioctl method */ | |
1846 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1847 | #endif | |
77382aee PA |
1848 | /* The above operation renders the procinfo's cached pstatus |
1849 | obsolete. */ | |
c3f6f71d | 1850 | pi->status_valid = 0; |
c906108c | 1851 | |
c3f6f71d JM |
1852 | return win; |
1853 | } | |
c906108c | 1854 | |
77382aee PA |
1855 | /* Specify the set of blocked / held signals in the process or LWP. |
1856 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1857 | |
c3f6f71d | 1858 | int |
37de36c6 | 1859 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1860 | { |
c3f6f71d JM |
1861 | int win; |
1862 | ||
77382aee PA |
1863 | /* We should never have to apply this operation to any procinfo |
1864 | except the one for the main process. If that ever changes for | |
1865 | any reason, then take out the following clause and replace it | |
1866 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1867 | |
c3f6f71d JM |
1868 | if (pi->tid != 0) |
1869 | pi = find_procinfo_or_die (pi->pid, 0); | |
1870 | ||
1871 | #ifdef NEW_PROC_API | |
1872 | { | |
1873 | struct { | |
37de36c6 | 1874 | procfs_ctl_t cmd; |
c3f6f71d | 1875 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1876 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1877 | } arg; |
1878 | ||
1879 | arg.cmd = PCSHOLD; | |
37de36c6 | 1880 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1881 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1882 | } | |
c906108c | 1883 | #else |
c3f6f71d | 1884 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1885 | #endif |
77382aee PA |
1886 | /* The above operation renders the procinfo's cached pstatus |
1887 | obsolete. */ | |
c3f6f71d JM |
1888 | pi->status_valid = 0; |
1889 | ||
1890 | return win; | |
c906108c SS |
1891 | } |
1892 | ||
77382aee PA |
1893 | /* Returns the set of signals that are pending in the process or LWP. |
1894 | Will also copy the sigset if SAVE is non-zero. */ | |
c906108c | 1895 | |
37de36c6 KB |
1896 | gdb_sigset_t * |
1897 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1898 | { |
37de36c6 | 1899 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1900 | |
77382aee PA |
1901 | /* We should never have to apply this operation to any procinfo |
1902 | except the one for the main process. If that ever changes for | |
1903 | any reason, then take out the following clause and replace it | |
1904 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1905 | |
c3f6f71d JM |
1906 | if (pi->tid != 0) |
1907 | pi = find_procinfo_or_die (pi->pid, 0); | |
1908 | ||
1909 | if (!pi->status_valid) | |
1910 | if (!proc_get_status (pi)) | |
1911 | return NULL; | |
1912 | ||
1913 | #ifdef NEW_PROC_API | |
1914 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1915 | #else | |
1916 | ret = &pi->prstatus.pr_sigpend; | |
1917 | #endif | |
1918 | if (save && ret) | |
37de36c6 | 1919 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1920 | |
c3f6f71d JM |
1921 | return ret; |
1922 | } | |
c906108c | 1923 | |
77382aee PA |
1924 | /* Returns the set of signal actions. Will also copy the sigactionset |
1925 | if SAVE is non-zero. */ | |
c906108c | 1926 | |
37de36c6 KB |
1927 | gdb_sigaction_t * |
1928 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 1929 | { |
37de36c6 | 1930 | gdb_sigaction_t *ret = NULL; |
c3f6f71d | 1931 | |
77382aee PA |
1932 | /* We should never have to apply this operation to any procinfo |
1933 | except the one for the main process. If that ever changes for | |
1934 | any reason, then take out the following clause and replace it | |
1935 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1936 | |
c3f6f71d JM |
1937 | if (pi->tid != 0) |
1938 | pi = find_procinfo_or_die (pi->pid, 0); | |
1939 | ||
1940 | if (!pi->status_valid) | |
1941 | if (!proc_get_status (pi)) | |
1942 | return NULL; | |
1943 | ||
1944 | #ifdef NEW_PROC_API | |
1945 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1946 | #else | |
1947 | ret = &pi->prstatus.pr_action; | |
1948 | #endif | |
1949 | if (save && ret) | |
37de36c6 | 1950 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 1951 | |
c3f6f71d JM |
1952 | return ret; |
1953 | } | |
c5aa993b | 1954 | |
77382aee PA |
1955 | /* Returns the set of signals that are held / blocked. Will also copy |
1956 | the sigset if SAVE is non-zero. */ | |
c906108c | 1957 | |
37de36c6 KB |
1958 | gdb_sigset_t * |
1959 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1960 | { |
37de36c6 | 1961 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1962 | |
77382aee PA |
1963 | /* We should never have to apply this operation to any procinfo |
1964 | except the one for the main process. If that ever changes for | |
1965 | any reason, then take out the following clause and replace it | |
1966 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1967 | |
c3f6f71d JM |
1968 | if (pi->tid != 0) |
1969 | pi = find_procinfo_or_die (pi->pid, 0); | |
1970 | ||
1971 | #ifdef NEW_PROC_API | |
1972 | if (!pi->status_valid) | |
1973 | if (!proc_get_status (pi)) | |
1974 | return NULL; | |
1975 | ||
1976 | #ifdef UNIXWARE | |
1977 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1978 | #else |
c3f6f71d JM |
1979 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1980 | #endif /* UNIXWARE */ | |
1981 | #else /* not NEW_PROC_API */ | |
1982 | { | |
37de36c6 | 1983 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1984 | |
1985 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1986 | ret = &sigheld; | |
1987 | } | |
1988 | #endif /* NEW_PROC_API */ | |
1989 | if (save && ret) | |
37de36c6 | 1990 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1991 | |
1992 | return ret; | |
c906108c SS |
1993 | } |
1994 | ||
77382aee PA |
1995 | /* Returns the set of signals that are traced / debugged. Will also |
1996 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1997 | |
37de36c6 KB |
1998 | gdb_sigset_t * |
1999 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2000 | { |
37de36c6 | 2001 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 2002 | |
77382aee PA |
2003 | /* We should never have to apply this operation to any procinfo |
2004 | except the one for the main process. If that ever changes for | |
2005 | any reason, then take out the following clause and replace it | |
2006 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2007 | |
c3f6f71d JM |
2008 | if (pi->tid != 0) |
2009 | pi = find_procinfo_or_die (pi->pid, 0); | |
2010 | ||
2011 | #ifdef NEW_PROC_API | |
2012 | if (!pi->status_valid) | |
2013 | if (!proc_get_status (pi)) | |
2014 | return NULL; | |
2015 | ||
2016 | ret = &pi->prstatus.pr_sigtrace; | |
2017 | #else | |
2018 | { | |
37de36c6 | 2019 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2020 | |
2021 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2022 | ret = &sigtrace; | |
2023 | } | |
c906108c | 2024 | #endif |
c3f6f71d | 2025 | if (save && ret) |
37de36c6 | 2026 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2027 | |
c3f6f71d JM |
2028 | return ret; |
2029 | } | |
c906108c | 2030 | |
77382aee PA |
2031 | /* Add SIGNO to the set of signals that are traced. Returns non-zero |
2032 | for success, zero for failure. */ | |
c906108c | 2033 | |
c3f6f71d | 2034 | int |
fba45db2 | 2035 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2036 | { |
37de36c6 | 2037 | gdb_sigset_t temp; |
c3f6f71d | 2038 | |
77382aee PA |
2039 | /* We should never have to apply this operation to any procinfo |
2040 | except the one for the main process. If that ever changes for | |
2041 | any reason, then take out the following clause and replace it | |
2042 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2043 | |
c3f6f71d JM |
2044 | if (pi->tid != 0) |
2045 | pi = find_procinfo_or_die (pi->pid, 0); | |
2046 | ||
2047 | if (pi) | |
c906108c | 2048 | { |
c3f6f71d | 2049 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2050 | { |
3c95f01c | 2051 | gdb_praddset (&temp, signo); |
c3f6f71d | 2052 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2053 | } |
2054 | } | |
c5aa993b | 2055 | |
c3f6f71d JM |
2056 | return 0; /* failure */ |
2057 | } | |
c906108c | 2058 | |
77382aee PA |
2059 | /* Remove SIGNO from the set of signals that are traced. Returns |
2060 | non-zero for success, zero for failure. */ | |
c906108c | 2061 | |
c3f6f71d | 2062 | int |
fba45db2 | 2063 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2064 | { |
37de36c6 | 2065 | gdb_sigset_t temp; |
c3f6f71d | 2066 | |
77382aee PA |
2067 | /* We should never have to apply this operation to any procinfo |
2068 | except the one for the main process. If that ever changes for | |
2069 | any reason, then take out the following clause and replace it | |
2070 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2071 | |
c3f6f71d JM |
2072 | if (pi->tid != 0) |
2073 | pi = find_procinfo_or_die (pi->pid, 0); | |
2074 | ||
2075 | if (pi) | |
c906108c | 2076 | { |
c3f6f71d | 2077 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2078 | { |
3c95f01c | 2079 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2080 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2081 | } |
c906108c | 2082 | } |
c906108c | 2083 | |
c3f6f71d | 2084 | return 0; /* failure */ |
c906108c SS |
2085 | } |
2086 | ||
77382aee PA |
2087 | /* Returns the set of hardware faults that are traced /debugged. Will |
2088 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d JM |
2089 | |
2090 | fltset_t * | |
fba45db2 | 2091 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2092 | { |
2093 | fltset_t *ret = NULL; | |
2094 | ||
77382aee PA |
2095 | /* We should never have to apply this operation to any procinfo |
2096 | except the one for the main process. If that ever changes for | |
2097 | any reason, then take out the following clause and replace it | |
2098 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2099 | |
c3f6f71d JM |
2100 | if (pi->tid != 0) |
2101 | pi = find_procinfo_or_die (pi->pid, 0); | |
2102 | ||
2103 | #ifdef NEW_PROC_API | |
2104 | if (!pi->status_valid) | |
2105 | if (!proc_get_status (pi)) | |
2106 | return NULL; | |
2107 | ||
2108 | ret = &pi->prstatus.pr_flttrace; | |
2109 | #else | |
2110 | { | |
2111 | static fltset_t flttrace; | |
2112 | ||
2113 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2114 | ret = &flttrace; | |
2115 | } | |
2116 | #endif | |
2117 | if (save && ret) | |
2118 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2119 | |
c3f6f71d JM |
2120 | return ret; |
2121 | } | |
c906108c | 2122 | |
77382aee PA |
2123 | /* Returns the set of syscalls that are traced /debugged on entry. |
2124 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2125 | |
c3f6f71d | 2126 | sysset_t * |
fba45db2 | 2127 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2128 | { |
2129 | sysset_t *ret = NULL; | |
2130 | ||
77382aee PA |
2131 | /* We should never have to apply this operation to any procinfo |
2132 | except the one for the main process. If that ever changes for | |
2133 | any reason, then take out the following clause and replace it | |
2134 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2135 | |
c3f6f71d JM |
2136 | if (pi->tid != 0) |
2137 | pi = find_procinfo_or_die (pi->pid, 0); | |
2138 | ||
2139 | #ifdef NEW_PROC_API | |
2140 | if (!pi->status_valid) | |
2141 | if (!proc_get_status (pi)) | |
2142 | return NULL; | |
2143 | ||
37de36c6 | 2144 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2145 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2146 | #else /* DYNAMIC_SYSCALLS */ |
2147 | { | |
2148 | static sysset_t *sysentry; | |
2149 | size_t size; | |
2150 | ||
2151 | if (!sysentry) | |
2152 | sysentry = sysset_t_alloc (pi); | |
2153 | ret = sysentry; | |
2154 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2155 | return NULL; | |
2156 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2157 | { | |
2158 | gdb_premptysysset (sysentry); | |
2159 | } | |
2160 | else | |
2161 | { | |
2162 | int rsize; | |
2163 | ||
2164 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 2165 | SEEK_SET) |
37de36c6 KB |
2166 | != (off_t) pi->prstatus.pr_sysentry_offset) |
2167 | return NULL; | |
2168 | size = sysset_t_size (pi); | |
2169 | gdb_premptysysset (sysentry); | |
2170 | rsize = read (pi->status_fd, sysentry, size); | |
2171 | if (rsize < 0) | |
2172 | return NULL; | |
2173 | } | |
2174 | } | |
2175 | #endif /* DYNAMIC_SYSCALLS */ | |
2176 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2177 | { |
2178 | static sysset_t sysentry; | |
c906108c | 2179 | |
c3f6f71d JM |
2180 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2181 | ret = &sysentry; | |
2182 | } | |
37de36c6 | 2183 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2184 | if (save && ret) |
37de36c6 | 2185 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2186 | |
c3f6f71d JM |
2187 | return ret; |
2188 | } | |
c5aa993b | 2189 | |
77382aee PA |
2190 | /* Returns the set of syscalls that are traced /debugged on exit. |
2191 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2192 | |
c3f6f71d | 2193 | sysset_t * |
fba45db2 | 2194 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2195 | { |
c3f6f71d JM |
2196 | sysset_t * ret = NULL; |
2197 | ||
77382aee PA |
2198 | /* We should never have to apply this operation to any procinfo |
2199 | except the one for the main process. If that ever changes for | |
2200 | any reason, then take out the following clause and replace it | |
2201 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2202 | |
c3f6f71d JM |
2203 | if (pi->tid != 0) |
2204 | pi = find_procinfo_or_die (pi->pid, 0); | |
2205 | ||
2206 | #ifdef NEW_PROC_API | |
2207 | if (!pi->status_valid) | |
2208 | if (!proc_get_status (pi)) | |
2209 | return NULL; | |
2210 | ||
37de36c6 | 2211 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2212 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2213 | #else /* DYNAMIC_SYSCALLS */ |
2214 | { | |
2215 | static sysset_t *sysexit; | |
2216 | size_t size; | |
2217 | ||
2218 | if (!sysexit) | |
2219 | sysexit = sysset_t_alloc (pi); | |
2220 | ret = sysexit; | |
2221 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2222 | return NULL; | |
2223 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2224 | { | |
2225 | gdb_premptysysset (sysexit); | |
2226 | } | |
2227 | else | |
2228 | { | |
2229 | int rsize; | |
2230 | ||
77382aee PA |
2231 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2232 | SEEK_SET) | |
37de36c6 KB |
2233 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2234 | return NULL; | |
2235 | size = sysset_t_size (pi); | |
2236 | gdb_premptysysset (sysexit); | |
2237 | rsize = read (pi->status_fd, sysexit, size); | |
2238 | if (rsize < 0) | |
2239 | return NULL; | |
2240 | } | |
2241 | } | |
2242 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2243 | #else |
2244 | { | |
2245 | static sysset_t sysexit; | |
c5aa993b | 2246 | |
c3f6f71d JM |
2247 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2248 | ret = &sysexit; | |
2249 | } | |
2250 | #endif | |
2251 | if (save && ret) | |
37de36c6 | 2252 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2253 | |
2254 | return ret; | |
2255 | } | |
c906108c | 2256 | |
77382aee PA |
2257 | /* The current fault (if any) is cleared; the associated signal will |
2258 | not be sent to the process or LWP when it resumes. Returns | |
2259 | non-zero for success, zero for failure. */ | |
c906108c | 2260 | |
c3f6f71d | 2261 | int |
fba45db2 | 2262 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2263 | { |
2264 | int win; | |
2265 | ||
77382aee PA |
2266 | /* We should never have to apply this operation to any procinfo |
2267 | except the one for the main process. If that ever changes for | |
2268 | any reason, then take out the following clause and replace it | |
2269 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2270 | |
c3f6f71d JM |
2271 | if (pi->tid != 0) |
2272 | pi = find_procinfo_or_die (pi->pid, 0); | |
2273 | ||
2274 | #ifdef NEW_PROC_API | |
2275 | { | |
37de36c6 | 2276 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2277 | |
c3f6f71d JM |
2278 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2279 | } | |
2280 | #else | |
2281 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2282 | #endif | |
2283 | ||
2284 | return win; | |
c906108c SS |
2285 | } |
2286 | ||
77382aee PA |
2287 | /* Set the "current signal" that will be delivered next to the |
2288 | process. NOTE: semantics are different from those of KILL. This | |
2289 | signal will be delivered to the process or LWP immediately when it | |
2290 | is resumed (even if the signal is held/blocked); it will NOT | |
2291 | immediately cause another event of interest, and will NOT first | |
2292 | trap back to the debugger. Returns non-zero for success, zero for | |
2293 | failure. */ | |
c3f6f71d JM |
2294 | |
2295 | int | |
fba45db2 | 2296 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2297 | { |
2298 | int win; | |
2299 | struct { | |
37de36c6 | 2300 | procfs_ctl_t cmd; |
c3f6f71d | 2301 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2302 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2303 | } arg; |
73930d4d | 2304 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2305 | ptid_t wait_ptid; |
2306 | struct target_waitstatus wait_status; | |
c3f6f71d | 2307 | |
77382aee PA |
2308 | /* We should never have to apply this operation to any procinfo |
2309 | except the one for the main process. If that ever changes for | |
2310 | any reason, then take out the following clause and replace it | |
2311 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2312 | |
c3f6f71d JM |
2313 | if (pi->tid != 0) |
2314 | pi = find_procinfo_or_die (pi->pid, 0); | |
2315 | ||
2316 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2317 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2318 | receives a PIOCSSIG with a signal identical to the current |
2319 | signal, it messes up the current signal. Work around the kernel | |
2320 | bug. */ | |
c3f6f71d JM |
2321 | if (signo > 0 && |
2322 | signo == proc_cursig (pi)) | |
0df8b418 | 2323 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2324 | #endif |
2325 | ||
2326 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2327 | get_last_target_status (&wait_ptid, &wait_status); |
2328 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2329 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2330 | && wait_status.value.sig == target_signal_from_host (signo) | |
2331 | && proc_get_status (pi) | |
2332 | #ifdef NEW_PROC_API | |
2333 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2334 | #else | |
2335 | && pi->prstatus.pr_info.si_signo == signo | |
2336 | #endif | |
2337 | ) | |
2338 | /* Use the siginfo associated with the signal being | |
2339 | redelivered. */ | |
2340 | #ifdef NEW_PROC_API | |
73930d4d | 2341 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2342 | #else |
73930d4d | 2343 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2344 | #endif |
2345 | else | |
2346 | { | |
73930d4d KH |
2347 | mysinfo.si_signo = signo; |
2348 | mysinfo.si_code = 0; | |
2349 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2350 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2351 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2352 | } |
c3f6f71d JM |
2353 | |
2354 | #ifdef NEW_PROC_API | |
2355 | arg.cmd = PCSSIG; | |
2356 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2357 | #else | |
2358 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2359 | #endif | |
c906108c | 2360 | |
c3f6f71d JM |
2361 | return win; |
2362 | } | |
c906108c | 2363 | |
77382aee PA |
2364 | /* The current signal (if any) is cleared, and is not sent to the |
2365 | process or LWP when it resumes. Returns non-zero for success, zero | |
2366 | for failure. */ | |
c906108c | 2367 | |
c3f6f71d | 2368 | int |
fba45db2 | 2369 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2370 | { |
2371 | int win; | |
2372 | ||
77382aee PA |
2373 | /* We should never have to apply this operation to any procinfo |
2374 | except the one for the main process. If that ever changes for | |
2375 | any reason, then take out the following clause and replace it | |
2376 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2377 | |
c3f6f71d JM |
2378 | if (pi->tid != 0) |
2379 | pi = find_procinfo_or_die (pi->pid, 0); | |
2380 | ||
2381 | #ifdef NEW_PROC_API | |
2382 | { | |
2383 | struct { | |
37de36c6 | 2384 | procfs_ctl_t cmd; |
c3f6f71d | 2385 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2386 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2387 | } arg; |
73930d4d | 2388 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2389 | |
2390 | arg.cmd = PCSSIG; | |
2391 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2392 | mysinfo.si_signo = 0; |
2393 | mysinfo.si_code = 0; | |
2394 | mysinfo.si_errno = 0; | |
2395 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2396 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2397 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2398 | |
2399 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2400 | } | |
2401 | #else | |
2402 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2403 | #endif | |
c906108c | 2404 | |
c3f6f71d JM |
2405 | return win; |
2406 | } | |
c906108c | 2407 | |
772cf8be MK |
2408 | /* Return the general-purpose registers for the process or LWP |
2409 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2410 | |
c3f6f71d | 2411 | gdb_gregset_t * |
fba45db2 | 2412 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2413 | { |
2414 | if (!pi->status_valid || !pi->gregs_valid) | |
2415 | if (!proc_get_status (pi)) | |
2416 | return NULL; | |
2417 | ||
772cf8be MK |
2418 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2419 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2420 | |
2421 | #ifdef NEW_PROC_API | |
772cf8be | 2422 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2423 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2424 | # else |
c3f6f71d | 2425 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2426 | # endif |
2427 | #else | |
c3f6f71d | 2428 | return &pi->prstatus.pr_reg; |
772cf8be | 2429 | #endif |
c3f6f71d | 2430 | } |
c5aa993b | 2431 | |
772cf8be MK |
2432 | /* Return the general-purpose registers for the process or LWP |
2433 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2434 | |
c3f6f71d | 2435 | gdb_fpregset_t * |
fba45db2 | 2436 | proc_get_fpregs (procinfo *pi) |
c906108c | 2437 | { |
c3f6f71d JM |
2438 | #ifdef NEW_PROC_API |
2439 | if (!pi->status_valid || !pi->fpregs_valid) | |
2440 | if (!proc_get_status (pi)) | |
2441 | return NULL; | |
2442 | ||
772cf8be | 2443 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2444 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2445 | # else |
c3f6f71d | 2446 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2447 | # endif |
c5aa993b | 2448 | |
772cf8be | 2449 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2450 | if (pi->fpregs_valid) |
772cf8be | 2451 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2452 | else |
c906108c | 2453 | { |
772cf8be | 2454 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2455 | { |
c3f6f71d | 2456 | return NULL; |
c906108c | 2457 | } |
c3f6f71d | 2458 | else |
c906108c | 2459 | { |
772cf8be | 2460 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2461 | struct { |
2462 | long pr_count; | |
2463 | tid_t pr_error_thread; | |
2464 | tfpregset_t thread_1; | |
2465 | } thread_fpregs; | |
2466 | ||
2467 | thread_fpregs.pr_count = 1; | |
2468 | thread_fpregs.thread_1.tid = pi->tid; | |
2469 | ||
772cf8be MK |
2470 | if (pi->tid == 0 |
2471 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2472 | { |
2473 | pi->fpregs_valid = 1; | |
772cf8be | 2474 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2475 | } |
772cf8be MK |
2476 | else if (pi->tid != 0 |
2477 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2478 | { |
2479 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2480 | sizeof (pi->fpregset)); | |
2481 | pi->fpregs_valid = 1; | |
772cf8be | 2482 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2483 | } |
2484 | else | |
2485 | { | |
2486 | return NULL; | |
2487 | } | |
772cf8be | 2488 | # else |
c3f6f71d JM |
2489 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2490 | { | |
2491 | pi->fpregs_valid = 1; | |
772cf8be | 2492 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2493 | } |
2494 | else | |
2495 | { | |
2496 | return NULL; | |
2497 | } | |
772cf8be | 2498 | # endif |
c906108c | 2499 | } |
c906108c | 2500 | } |
772cf8be | 2501 | #endif /* NEW_PROC_API */ |
c906108c SS |
2502 | } |
2503 | ||
772cf8be MK |
2504 | /* Write the general-purpose registers back to the process or LWP |
2505 | corresponding to PI. Return non-zero for success, zero for | |
2506 | failure. */ | |
c3f6f71d JM |
2507 | |
2508 | int | |
fba45db2 | 2509 | proc_set_gregs (procinfo *pi) |
c906108c | 2510 | { |
c3f6f71d JM |
2511 | gdb_gregset_t *gregs; |
2512 | int win; | |
c5aa993b | 2513 | |
772cf8be MK |
2514 | gregs = proc_get_gregs (pi); |
2515 | if (gregs == NULL) | |
2516 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2517 | |
772cf8be | 2518 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2519 | { |
c3f6f71d | 2520 | return 0; |
c906108c | 2521 | } |
c3f6f71d | 2522 | else |
c906108c | 2523 | { |
c3f6f71d JM |
2524 | #ifdef NEW_PROC_API |
2525 | struct { | |
37de36c6 | 2526 | procfs_ctl_t cmd; |
c3f6f71d JM |
2527 | /* Use char array to avoid alignment issues. */ |
2528 | char gregs[sizeof (gdb_gregset_t)]; | |
2529 | } arg; | |
2530 | ||
772cf8be | 2531 | arg.cmd = PCSREG; |
c3f6f71d JM |
2532 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2533 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2534 | #else | |
2535 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2536 | #endif | |
c906108c | 2537 | } |
c3f6f71d | 2538 | |
772cf8be | 2539 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2540 | pi->gregs_valid = 0; |
2541 | return win; | |
c906108c SS |
2542 | } |
2543 | ||
772cf8be MK |
2544 | /* Write the floating-pointer registers back to the process or LWP |
2545 | corresponding to PI. Return non-zero for success, zero for | |
2546 | failure. */ | |
c3f6f71d JM |
2547 | |
2548 | int | |
fba45db2 | 2549 | proc_set_fpregs (procinfo *pi) |
c906108c | 2550 | { |
c3f6f71d JM |
2551 | gdb_fpregset_t *fpregs; |
2552 | int win; | |
2553 | ||
772cf8be MK |
2554 | fpregs = proc_get_fpregs (pi); |
2555 | if (fpregs == NULL) | |
2556 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2557 | |
772cf8be | 2558 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2559 | { |
c3f6f71d | 2560 | return 0; |
c906108c | 2561 | } |
c3f6f71d | 2562 | else |
c906108c | 2563 | { |
c3f6f71d JM |
2564 | #ifdef NEW_PROC_API |
2565 | struct { | |
37de36c6 | 2566 | procfs_ctl_t cmd; |
c3f6f71d JM |
2567 | /* Use char array to avoid alignment issues. */ |
2568 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2569 | } arg; | |
2570 | ||
772cf8be | 2571 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2572 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2573 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2574 | #else | |
772cf8be | 2575 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2576 | if (pi->tid == 0) |
2577 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2578 | else | |
2579 | { | |
2580 | struct { | |
2581 | long pr_count; | |
2582 | tid_t pr_error_thread; | |
2583 | tfpregset_t thread_1; | |
2584 | } thread_fpregs; | |
2585 | ||
2586 | thread_fpregs.pr_count = 1; | |
2587 | thread_fpregs.thread_1.tid = pi->tid; | |
2588 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2589 | sizeof (*fpregs)); | |
2590 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2591 | } | |
772cf8be | 2592 | # else |
c3f6f71d | 2593 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2594 | # endif |
2595 | #endif /* NEW_PROC_API */ | |
c906108c | 2596 | } |
c3f6f71d | 2597 | |
772cf8be | 2598 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2599 | pi->fpregs_valid = 0; |
2600 | return win; | |
c906108c SS |
2601 | } |
2602 | ||
77382aee PA |
2603 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2604 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2605 | |
c3f6f71d | 2606 | int |
fba45db2 | 2607 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2608 | { |
2609 | int win; | |
c906108c | 2610 | |
77382aee PA |
2611 | /* We might conceivably apply this operation to an LWP, and the |
2612 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2613 | |
c3f6f71d JM |
2614 | if (pi->ctl_fd == 0 && |
2615 | open_procinfo_files (pi, FD_CTL) == 0) | |
2616 | { | |
2617 | return 0; | |
2618 | } | |
2619 | else | |
2620 | { | |
2621 | #ifdef NEW_PROC_API | |
37de36c6 | 2622 | procfs_ctl_t cmd[2]; |
c906108c | 2623 | |
c3f6f71d JM |
2624 | cmd[0] = PCKILL; |
2625 | cmd[1] = signo; | |
2626 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2627 | #else /* ioctl method */ | |
2628 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2629 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2630 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2631 | #endif | |
2632 | } | |
c906108c | 2633 | |
c3f6f71d JM |
2634 | return win; |
2635 | } | |
c906108c | 2636 | |
77382aee PA |
2637 | /* Find the pid of the process that started this one. Returns the |
2638 | parent process pid, or zero. */ | |
c906108c | 2639 | |
c3f6f71d | 2640 | int |
fba45db2 | 2641 | proc_parent_pid (procinfo *pi) |
c906108c | 2642 | { |
77382aee PA |
2643 | /* We should never have to apply this operation to any procinfo |
2644 | except the one for the main process. If that ever changes for | |
2645 | any reason, then take out the following clause and replace it | |
2646 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2647 | |
c3f6f71d JM |
2648 | if (pi->tid != 0) |
2649 | pi = find_procinfo_or_die (pi->pid, 0); | |
2650 | ||
2651 | if (!pi->status_valid) | |
2652 | if (!proc_get_status (pi)) | |
2653 | return 0; | |
c5aa993b | 2654 | |
c3f6f71d JM |
2655 | return pi->prstatus.pr_ppid; |
2656 | } | |
2657 | ||
9a043c1d AC |
2658 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2659 | (a.k.a void pointer)! */ | |
2660 | ||
1ca8fce0 JB |
2661 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2662 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2663 | static void * |
2664 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2665 | { | |
4e906f53 | 2666 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2667 | void *ptr; |
2668 | ||
4e906f53 | 2669 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2670 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2671 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2672 | return ptr; |
2673 | } | |
1ca8fce0 | 2674 | #endif |
9a043c1d | 2675 | |
c3f6f71d | 2676 | int |
fba45db2 | 2677 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2678 | { |
d1a7880c PA |
2679 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2680 | /* If neither or these is defined, we can't support watchpoints. | |
2681 | This just avoids possibly failing to compile the below on such | |
2682 | systems. */ | |
c3f6f71d JM |
2683 | return 0; |
2684 | #else | |
0df8b418 MS |
2685 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
2686 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out. */ | |
c3f6f71d JM |
2687 | return 0; |
2688 | #else | |
2689 | struct { | |
37de36c6 | 2690 | procfs_ctl_t cmd; |
c3f6f71d JM |
2691 | char watch[sizeof (prwatch_t)]; |
2692 | } arg; | |
73930d4d | 2693 | prwatch_t pwatch; |
c3f6f71d | 2694 | |
9a043c1d AC |
2695 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2696 | convert a target address into something that can be stored in a | |
2697 | native data structure. */ | |
831e682e | 2698 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2699 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2700 | #else |
73930d4d | 2701 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2702 | #endif |
73930d4d KH |
2703 | pwatch.pr_size = len; |
2704 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2705 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2706 | arg.cmd = PCWATCH; | |
73930d4d | 2707 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2708 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2709 | #else | |
2710 | #if defined (PIOCSWATCH) | |
73930d4d | 2711 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2712 | #else |
2713 | return 0; /* Fail */ | |
2714 | #endif | |
2715 | #endif | |
2716 | #endif | |
2717 | #endif | |
c906108c SS |
2718 | } |
2719 | ||
965b60ee | 2720 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2721 | |
c3f6f71d | 2722 | #include <sys/sysi86.h> |
c906108c | 2723 | |
77382aee PA |
2724 | /* The KEY is actually the value of the lower 16 bits of the GS |
2725 | register for the LWP that we're interested in. Returns the | |
2726 | matching ssh struct (LDT entry). */ | |
c906108c | 2727 | |
c3f6f71d | 2728 | struct ssd * |
fba45db2 | 2729 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2730 | { |
c3f6f71d JM |
2731 | static struct ssd *ldt_entry = NULL; |
2732 | #ifdef NEW_PROC_API | |
2733 | char pathname[MAX_PROC_NAME_SIZE]; | |
2734 | struct cleanup *old_chain = NULL; | |
2735 | int fd; | |
2736 | ||
2737 | /* Allocate space for one LDT entry. | |
2738 | This alloc must persist, because we return a pointer to it. */ | |
2739 | if (ldt_entry == NULL) | |
2740 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2741 | ||
2742 | /* Open the file descriptor for the LDT table. */ | |
2743 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2744 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2745 | { |
c3f6f71d JM |
2746 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2747 | return NULL; | |
c906108c | 2748 | } |
0df8b418 | 2749 | /* Make sure it gets closed again! */ |
004527cb | 2750 | old_chain = make_cleanup_close (fd); |
c906108c | 2751 | |
c3f6f71d JM |
2752 | /* Now 'read' thru the table, find a match and return it. */ |
2753 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2754 | { |
c3f6f71d JM |
2755 | if (ldt_entry->sel == 0 && |
2756 | ldt_entry->bo == 0 && | |
2757 | ldt_entry->acc1 == 0 && | |
2758 | ldt_entry->acc2 == 0) | |
2759 | break; /* end of table */ | |
0df8b418 | 2760 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2761 | if (ldt_entry->sel == key) |
2762 | return ldt_entry; | |
c906108c | 2763 | } |
0df8b418 | 2764 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2765 | return NULL; |
2766 | #else | |
2767 | int nldt, i; | |
2768 | static int nalloc = 0; | |
c906108c | 2769 | |
c3f6f71d JM |
2770 | /* Get the number of LDT entries. */ |
2771 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2772 | { |
c3f6f71d JM |
2773 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2774 | return NULL; | |
c906108c SS |
2775 | } |
2776 | ||
0df8b418 MS |
2777 | /* Allocate space for the number of LDT entries. */ |
2778 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2779 | if (nldt > nalloc) |
c906108c | 2780 | { |
19958708 | 2781 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2782 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2783 | nalloc = nldt; | |
2784 | } | |
19958708 | 2785 | |
c3f6f71d JM |
2786 | /* Read the whole table in one gulp. */ |
2787 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2788 | { | |
2789 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2790 | return NULL; | |
c906108c SS |
2791 | } |
2792 | ||
0df8b418 | 2793 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2794 | for (i = 0; i < nldt; i++) |
2795 | if (ldt_entry[i].sel == key) | |
2796 | return &ldt_entry[i]; | |
c906108c | 2797 | |
0df8b418 | 2798 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2799 | return NULL; |
2800 | #endif | |
2801 | } | |
c906108c | 2802 | |
77382aee | 2803 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2804 | |
2805 | struct ssd * | |
2806 | procfs_find_LDT_entry (ptid_t ptid) | |
2807 | { | |
2808 | gdb_gregset_t *gregs; | |
2809 | int key; | |
2810 | procinfo *pi; | |
2811 | ||
0df8b418 | 2812 | /* Find procinfo for the lwp. */ |
965b60ee JB |
2813 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
2814 | { | |
0b62613e | 2815 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2816 | PIDGET (ptid), TIDGET (ptid)); |
2817 | return NULL; | |
2818 | } | |
0df8b418 | 2819 | /* get its general registers. */ |
965b60ee JB |
2820 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2821 | { | |
0b62613e | 2822 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2823 | PIDGET (ptid), TIDGET (ptid)); |
2824 | return NULL; | |
2825 | } | |
0df8b418 | 2826 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2827 | key = (*gregs)[GS] & 0xffff; |
2828 | ||
0df8b418 | 2829 | /* Find the matching entry and return it. */ |
965b60ee JB |
2830 | return proc_get_LDT_entry (pi, key); |
2831 | } | |
2832 | ||
2833 | #endif | |
c906108c | 2834 | |
c3f6f71d | 2835 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2836 | |
c3f6f71d | 2837 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2838 | |
c3f6f71d JM |
2839 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2840 | since there is a different way to do threads on every OS. */ | |
c906108c | 2841 | |
77382aee | 2842 | /* Returns the number of threads for the process. */ |
c906108c | 2843 | |
c3f6f71d | 2844 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2845 | /* OSF version */ |
19958708 | 2846 | int |
fba45db2 | 2847 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2848 | { |
2849 | int nthreads = 0; | |
c906108c | 2850 | |
c3f6f71d JM |
2851 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2852 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2853 | |
c3f6f71d | 2854 | return nthreads; |
c906108c SS |
2855 | } |
2856 | ||
c3f6f71d JM |
2857 | #else |
2858 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2859 | /* Solaris and Unixware version */ |
c3f6f71d | 2860 | int |
fba45db2 | 2861 | proc_get_nthreads (procinfo *pi) |
c906108c | 2862 | { |
c3f6f71d JM |
2863 | if (!pi->status_valid) |
2864 | if (!proc_get_status (pi)) | |
2865 | return 0; | |
c5aa993b | 2866 | |
77382aee PA |
2867 | /* NEW_PROC_API: only works for the process procinfo, because the |
2868 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2869 | #ifdef NEW_PROC_API |
0df8b418 | 2870 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2871 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2872 | #endif |
c3f6f71d | 2873 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2874 | } |
2875 | ||
c3f6f71d | 2876 | #else |
77382aee | 2877 | /* Default version */ |
c3f6f71d | 2878 | int |
fba45db2 | 2879 | proc_get_nthreads (procinfo *pi) |
c906108c | 2880 | { |
c3f6f71d JM |
2881 | return 0; |
2882 | } | |
2883 | #endif | |
2884 | #endif | |
2885 | ||
77382aee PA |
2886 | /* LWP version. |
2887 | ||
2888 | Return the ID of the thread that had an event of interest. | |
2889 | (ie. the one that hit a breakpoint or other traced event). All | |
2890 | other things being equal, this should be the ID of a thread that is | |
2891 | currently executing. */ | |
c3f6f71d JM |
2892 | |
2893 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2894 | /* Solaris and Unixware version */ |
c3f6f71d | 2895 | int |
fba45db2 | 2896 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2897 | { |
77382aee PA |
2898 | /* Note: this should be applied to the root procinfo for the |
2899 | process, not to the procinfo for an LWP. If applied to the | |
2900 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2901 | that case, find the parent process procinfo. */ | |
19958708 | 2902 | |
c3f6f71d JM |
2903 | if (pi->tid != 0) |
2904 | pi = find_procinfo_or_die (pi->pid, 0); | |
2905 | ||
2906 | if (!pi->status_valid) | |
2907 | if (!proc_get_status (pi)) | |
2908 | return 0; | |
2909 | ||
2910 | #ifdef NEW_PROC_API | |
2911 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2912 | #else |
c3f6f71d | 2913 | return pi->prstatus.pr_who; |
c906108c | 2914 | #endif |
c3f6f71d | 2915 | } |
c906108c | 2916 | |
c3f6f71d JM |
2917 | #else |
2918 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2919 | /* OSF version */ |
19958708 | 2920 | int |
fba45db2 | 2921 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2922 | { |
0df8b418 | 2923 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2924 | return pi->prstatus.pr_tid; |
2925 | #else | |
2926 | return 0; | |
2927 | #endif | |
c906108c SS |
2928 | } |
2929 | ||
c3f6f71d | 2930 | #else |
77382aee | 2931 | /* Default version */ |
19958708 | 2932 | int |
fba45db2 | 2933 | proc_get_current_thread (procinfo *pi) |
c906108c | 2934 | { |
c3f6f71d JM |
2935 | return 0; |
2936 | } | |
2937 | ||
2938 | #endif | |
2939 | #endif | |
c906108c | 2940 | |
77382aee PA |
2941 | /* Discover the IDs of all the threads within the process, and create |
2942 | a procinfo for each of them (chained to the parent). This | |
2943 | unfortunately requires a different method on every OS. Returns | |
2944 | non-zero for success, zero for failure. */ | |
c906108c | 2945 | |
c3f6f71d | 2946 | int |
fba45db2 | 2947 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2948 | { |
2949 | if (thread && parent) /* sanity */ | |
c906108c | 2950 | { |
c3f6f71d JM |
2951 | thread->status_valid = 0; |
2952 | if (!proc_get_status (thread)) | |
2953 | destroy_one_procinfo (&parent->thread_list, thread); | |
2954 | } | |
2955 | return 0; /* keep iterating */ | |
2956 | } | |
c5aa993b | 2957 | |
c3f6f71d | 2958 | #if defined (PIOCLSTATUS) |
77382aee | 2959 | /* Solaris 2.5 (ioctl) version */ |
c3f6f71d | 2960 | int |
fba45db2 | 2961 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2962 | { |
2963 | gdb_prstatus_t *prstatus; | |
2964 | struct cleanup *old_chain = NULL; | |
2965 | procinfo *thread; | |
2966 | int nlwp, i; | |
2967 | ||
77382aee PA |
2968 | /* We should never have to apply this operation to any procinfo |
2969 | except the one for the main process. If that ever changes for | |
2970 | any reason, then take out the following clause and replace it | |
2971 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2972 | |
c3f6f71d JM |
2973 | if (pi->tid != 0) |
2974 | pi = find_procinfo_or_die (pi->pid, 0); | |
2975 | ||
2976 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2977 | ||
2978 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2979 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2980 | ||
3c37485b | 2981 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2982 | |
b8c9b27d | 2983 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2984 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2985 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2986 | ||
77382aee | 2987 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2988 | for (i = 1; i < nlwp + 1; i++) |
2989 | { | |
2990 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2991 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2992 | |
c3f6f71d JM |
2993 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2994 | thread->status_valid = 1; | |
2995 | } | |
2996 | pi->threads_valid = 1; | |
2997 | do_cleanups (old_chain); | |
2998 | return 1; | |
2999 | } | |
3000 | #else | |
3001 | #ifdef NEW_PROC_API | |
0df8b418 | 3002 | /* Unixware and Solaris 6 (and later) version. */ |
004527cb AC |
3003 | static void |
3004 | do_closedir_cleanup (void *dir) | |
3005 | { | |
3006 | closedir (dir); | |
3007 | } | |
3008 | ||
c3f6f71d | 3009 | int |
fba45db2 | 3010 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3011 | { |
3012 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3013 | struct dirent *direntry; | |
3014 | struct cleanup *old_chain = NULL; | |
3015 | procinfo *thread; | |
3016 | DIR *dirp; | |
3017 | int lwpid; | |
3018 | ||
77382aee PA |
3019 | /* We should never have to apply this operation to any procinfo |
3020 | except the one for the main process. If that ever changes for | |
3021 | any reason, then take out the following clause and replace it | |
3022 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3023 | |
c3f6f71d JM |
3024 | if (pi->tid != 0) |
3025 | pi = find_procinfo_or_die (pi->pid, 0); | |
3026 | ||
3027 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3028 | ||
77382aee PA |
3029 | /* Unixware |
3030 | ||
3031 | Note: this brute-force method is the only way I know of to | |
3032 | accomplish this task on Unixware. This method will also work on | |
3033 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
3034 | way to do this on Solaris, but the margins of this manuscript are | |
3035 | too small to write it here... ;-) */ | |
c3f6f71d JM |
3036 | |
3037 | strcpy (pathname, pi->pathname); | |
3038 | strcat (pathname, "/lwp"); | |
3039 | if ((dirp = opendir (pathname)) == NULL) | |
3040 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3041 | ||
004527cb | 3042 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3043 | while ((direntry = readdir (dirp)) != NULL) |
3044 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3045 | { | |
3046 | lwpid = atoi (&direntry->d_name[0]); | |
3047 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3048 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3049 | } | |
3050 | pi->threads_valid = 1; | |
3051 | do_cleanups (old_chain); | |
3052 | return 1; | |
3053 | } | |
3054 | #else | |
3055 | #ifdef PIOCTLIST | |
77382aee | 3056 | /* OSF version */ |
19958708 | 3057 | int |
fba45db2 | 3058 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3059 | { |
3060 | int nthreads, i; | |
3061 | tid_t *threads; | |
3062 | ||
77382aee PA |
3063 | /* We should never have to apply this operation to any procinfo |
3064 | except the one for the main process. If that ever changes for | |
3065 | any reason, then take out the following clause and replace it | |
3066 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3067 | |
c3f6f71d JM |
3068 | if (pi->tid != 0) |
3069 | pi = find_procinfo_or_die (pi->pid, 0); | |
3070 | ||
3071 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3072 | ||
3073 | nthreads = proc_get_nthreads (pi); | |
3074 | if (nthreads < 2) | |
0df8b418 | 3075 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 3076 | |
3c37485b | 3077 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3078 | |
c3f6f71d JM |
3079 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3080 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3081 | ||
3082 | for (i = 0; i < nthreads; i++) | |
3083 | { | |
3084 | if (!find_procinfo (pi->pid, threads[i])) | |
3085 | if (!create_procinfo (pi->pid, threads[i])) | |
3086 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3087 | } |
c3f6f71d JM |
3088 | pi->threads_valid = 1; |
3089 | return 1; | |
c906108c | 3090 | } |
c3f6f71d | 3091 | #else |
77382aee | 3092 | /* Default version */ |
c3f6f71d | 3093 | int |
fba45db2 | 3094 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3095 | { |
3096 | return 0; | |
3097 | } | |
3098 | #endif /* OSF PIOCTLIST */ | |
3099 | #endif /* NEW_PROC_API */ | |
3100 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3101 | |
77382aee PA |
3102 | /* Given a pointer to a function, call that function once for each lwp |
3103 | in the procinfo list, until the function returns non-zero, in which | |
3104 | event return the value returned by the function. | |
3105 | ||
3106 | Note: this function does NOT call update_threads. If you want to | |
3107 | discover new threads first, you must call that function explicitly. | |
3108 | This function just makes a quick pass over the currently-known | |
3109 | procinfos. | |
3110 | ||
3111 | PI is the parent process procinfo. FUNC is the per-thread | |
3112 | function. PTR is an opaque parameter for function. Returns the | |
3113 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d JM |
3114 | |
3115 | int | |
d0849a9a KB |
3116 | proc_iterate_over_threads (procinfo *pi, |
3117 | int (*func) (procinfo *, procinfo *, void *), | |
3118 | void *ptr) | |
c906108c | 3119 | { |
c3f6f71d JM |
3120 | procinfo *thread, *next; |
3121 | int retval = 0; | |
c906108c | 3122 | |
77382aee PA |
3123 | /* We should never have to apply this operation to any procinfo |
3124 | except the one for the main process. If that ever changes for | |
3125 | any reason, then take out the following clause and replace it | |
3126 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3127 | |
c3f6f71d JM |
3128 | if (pi->tid != 0) |
3129 | pi = find_procinfo_or_die (pi->pid, 0); | |
3130 | ||
3131 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3132 | { |
0df8b418 | 3133 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
3134 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
3135 | break; | |
c906108c | 3136 | } |
c3f6f71d JM |
3137 | |
3138 | return retval; | |
c906108c SS |
3139 | } |
3140 | ||
c3f6f71d JM |
3141 | /* =================== END, Thread "MODULE" =================== */ |
3142 | ||
3143 | /* =================== END, /proc "MODULE" =================== */ | |
3144 | ||
3145 | /* =================== GDB "MODULE" =================== */ | |
3146 | ||
77382aee PA |
3147 | /* Here are all of the gdb target vector functions and their |
3148 | friends. */ | |
c3f6f71d | 3149 | |
39f77062 | 3150 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3151 | static void do_detach (int signo); |
9185ddce | 3152 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 3153 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
3154 | |
3155 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3156 | the startup phase. The following two variables are used to record | |
3157 | the address of the breakpoint, and the code that was replaced by | |
3158 | a breakpoint. */ | |
3159 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3160 | static void *dbx_link_bpt; |
c3f6f71d | 3161 | |
77382aee PA |
3162 | /* Sets up the inferior to be debugged. Registers to trace signals, |
3163 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
3164 | may want to customize that. Returns zero for success (note! | |
3165 | unlike most functions in this module); on failure, returns the LINE | |
3166 | NUMBER where it failed! */ | |
c3f6f71d JM |
3167 | |
3168 | static int | |
fba45db2 | 3169 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3170 | { |
c3f6f71d | 3171 | fltset_t traced_faults; |
37de36c6 KB |
3172 | gdb_sigset_t traced_signals; |
3173 | sysset_t *traced_syscall_entries; | |
3174 | sysset_t *traced_syscall_exits; | |
3175 | int status; | |
c906108c | 3176 | |
c3f6f71d JM |
3177 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3178 | /* On some systems (OSF), we don't trace hardware faults. | |
3179 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
3180 | Wonder why we don't just do that in general? */ |
3181 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 3182 | #else |
0df8b418 MS |
3183 | /* Register to trace hardware faults in the child. */ |
3184 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3185 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3186 | #endif |
3187 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3188 | return __LINE__; | |
c906108c | 3189 | |
2455069d UW |
3190 | /* Initially, register to trace all signals in the child. */ |
3191 | prfillset (&traced_signals); | |
3192 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
3193 | return __LINE__; |
3194 | ||
37de36c6 | 3195 | |
c3f6f71d | 3196 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3197 | traced_syscall_entries = sysset_t_alloc (pi); |
3198 | gdb_premptysysset (traced_syscall_entries); | |
3199 | #ifdef SYS_exit | |
3200 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3201 | #endif | |
c3f6f71d | 3202 | #ifdef SYS_lwpexit |
0df8b418 | 3203 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
3204 | #endif |
3205 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3206 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3207 | #endif | |
3208 | #ifdef DYNAMIC_SYSCALLS | |
3209 | { | |
3210 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 3211 | |
37de36c6 KB |
3212 | if (callnum >= 0) |
3213 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3214 | } | |
c906108c SS |
3215 | #endif |
3216 | ||
37de36c6 KB |
3217 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3218 | xfree (traced_syscall_entries); | |
3219 | if (!status) | |
c3f6f71d JM |
3220 | return __LINE__; |
3221 | ||
3222 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3223 | /* OSF method for tracing exec syscalls. Quoting: | |
3224 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3225 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 3226 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
3227 | { |
3228 | int prfs_flags; | |
3229 | ||
3230 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3231 | return __LINE__; | |
3232 | ||
3233 | prfs_flags |= PRFS_STOPEXEC; | |
3234 | ||
3235 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3236 | return __LINE__; | |
3237 | } | |
3238 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 3239 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
3240 | /* GW: Rationale... |
3241 | Not all systems with /proc have all the exec* syscalls with the same | |
3242 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 3243 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 3244 | |
37de36c6 KB |
3245 | traced_syscall_exits = sysset_t_alloc (pi); |
3246 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3247 | #ifdef SYS_exec |
37de36c6 | 3248 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3249 | #endif |
3250 | #ifdef SYS_execve | |
37de36c6 | 3251 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3252 | #endif |
3253 | #ifdef SYS_execv | |
37de36c6 | 3254 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3255 | #endif |
c5aa993b | 3256 | |
c3f6f71d | 3257 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3258 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3259 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3260 | #endif |
c5aa993b | 3261 | |
0df8b418 | 3262 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3263 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3264 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3265 | #endif |
c5aa993b | 3266 | |
37de36c6 KB |
3267 | #ifdef DYNAMIC_SYSCALLS |
3268 | { | |
3269 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3270 | |
37de36c6 KB |
3271 | if (callnum >= 0) |
3272 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3273 | callnum = find_syscall (pi, "ra_execve"); | |
3274 | if (callnum >= 0) | |
3275 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3276 | } | |
3277 | #endif | |
c906108c | 3278 | |
37de36c6 KB |
3279 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3280 | xfree (traced_syscall_exits); | |
3281 | if (!status) | |
c3f6f71d JM |
3282 | return __LINE__; |
3283 | ||
3284 | #endif /* PRFS_STOPEXEC */ | |
3285 | return 0; | |
c906108c SS |
3286 | } |
3287 | ||
19958708 | 3288 | static void |
136d6dae | 3289 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3290 | { |
c3f6f71d JM |
3291 | char *exec_file; |
3292 | int pid; | |
3293 | ||
74164c56 | 3294 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3295 | |
c3f6f71d | 3296 | if (pid == getpid ()) |
8a3fe4f8 | 3297 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3298 | |
c3f6f71d | 3299 | if (from_tty) |
c906108c | 3300 | { |
c3f6f71d JM |
3301 | exec_file = get_exec_file (0); |
3302 | ||
3303 | if (exec_file) | |
a3f17187 | 3304 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3305 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3306 | else |
a3f17187 | 3307 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3308 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3309 | |
3310 | fflush (stdout); | |
c906108c | 3311 | } |
39f77062 | 3312 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3313 | push_target (ops); |
c3f6f71d JM |
3314 | } |
3315 | ||
19958708 | 3316 | static void |
136d6dae | 3317 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3318 | { |
cc377e6b | 3319 | int sig = 0; |
7f9f62ba | 3320 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3321 | |
3322 | if (args) | |
3323 | sig = atoi (args); | |
c3f6f71d JM |
3324 | |
3325 | if (from_tty) | |
c906108c | 3326 | { |
cc377e6b MK |
3327 | char *exec_file; |
3328 | ||
c3f6f71d | 3329 | exec_file = get_exec_file (0); |
cc377e6b | 3330 | if (exec_file == NULL) |
c3f6f71d | 3331 | exec_file = ""; |
cc377e6b | 3332 | |
a3f17187 | 3333 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3334 | target_pid_to_str (pid_to_ptid (pid))); |
3335 | gdb_flush (gdb_stdout); | |
c906108c | 3336 | } |
19958708 | 3337 | |
cc377e6b MK |
3338 | do_detach (sig); |
3339 | ||
39f77062 | 3340 | inferior_ptid = null_ptid; |
7f9f62ba | 3341 | detach_inferior (pid); |
28439f5e | 3342 | unpush_target (ops); |
c906108c SS |
3343 | } |
3344 | ||
39f77062 KB |
3345 | static ptid_t |
3346 | do_attach (ptid_t ptid) | |
c906108c | 3347 | { |
c3f6f71d | 3348 | procinfo *pi; |
181e7f93 | 3349 | struct inferior *inf; |
c3f6f71d | 3350 | int fail; |
2689673f | 3351 | int lwpid; |
c3f6f71d | 3352 | |
39f77062 | 3353 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3354 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3355 | |
3356 | if (!open_procinfo_files (pi, FD_CTL)) | |
3357 | { | |
3358 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3359 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3360 | PIDGET (ptid)); |
c3f6f71d JM |
3361 | dead_procinfo (pi, errmsg, NOKILL); |
3362 | } | |
c906108c | 3363 | |
c3f6f71d JM |
3364 | /* Stop the process (if it isn't already stopped). */ |
3365 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3366 | { |
c3f6f71d JM |
3367 | pi->was_stopped = 1; |
3368 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3369 | } |
3370 | else | |
3371 | { | |
c3f6f71d JM |
3372 | pi->was_stopped = 0; |
3373 | /* Set the process to run again when we close it. */ | |
3374 | if (!proc_set_run_on_last_close (pi)) | |
3375 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3376 | ||
0df8b418 | 3377 | /* Now stop the process. */ |
c3f6f71d JM |
3378 | if (!proc_stop_process (pi)) |
3379 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3380 | pi->ignore_next_sigstop = 1; | |
c906108c | 3381 | } |
c3f6f71d JM |
3382 | /* Save some of the /proc state to be restored if we detach. */ |
3383 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3384 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3385 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3386 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3387 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3388 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3389 | NOKILL); | |
37de36c6 | 3390 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3391 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3392 | NOKILL); |
3393 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3394 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3395 | ||
3396 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3397 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3398 | ||
6c95b8df PA |
3399 | inf = current_inferior (); |
3400 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3401 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3402 | inf->attach_flag = 1; |
2689673f PA |
3403 | |
3404 | /* Create a procinfo for the current lwp. */ | |
3405 | lwpid = proc_get_current_thread (pi); | |
3406 | create_procinfo (pi->pid, lwpid); | |
3407 | ||
3408 | /* Add it to gdb's thread list. */ | |
3409 | ptid = MERGEPID (pi->pid, lwpid); | |
3410 | add_thread (ptid); | |
3411 | ||
3412 | return ptid; | |
c906108c SS |
3413 | } |
3414 | ||
3415 | static void | |
fba45db2 | 3416 | do_detach (int signo) |
c906108c | 3417 | { |
c3f6f71d | 3418 | procinfo *pi; |
c906108c | 3419 | |
0df8b418 | 3420 | /* Find procinfo for the main process. */ |
39f77062 | 3421 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3422 | if (signo) |
3423 | if (!proc_set_current_signal (pi, signo)) | |
3424 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3425 | |
c3f6f71d JM |
3426 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3427 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3428 | |
c3f6f71d JM |
3429 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3430 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3431 | ||
37de36c6 | 3432 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3433 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3434 | ||
37de36c6 | 3435 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3436 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3437 | ||
3438 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3439 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3440 | ||
3441 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3442 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3443 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3444 | { |
3445 | /* Clear any pending signal. */ | |
3446 | if (!proc_clear_current_fault (pi)) | |
3447 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3448 | ||
1a303dec MS |
3449 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3450 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3451 | ||
c3f6f71d JM |
3452 | if (!proc_set_run_on_last_close (pi)) |
3453 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3454 | } | |
3455 | ||
c3f6f71d | 3456 | destroy_procinfo (pi); |
c906108c SS |
3457 | } |
3458 | ||
772cf8be MK |
3459 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3460 | for all registers. | |
3461 | ||
3462 | ??? Is the following note still relevant? We can't get individual | |
3463 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3464 | don't bother with caching at all in that case. | |
3465 | ||
3466 | NOTE: Since the /proc interface cannot give us individual | |
3467 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3468 | This results in the possibility that we will do unnecessarily many | |
3469 | fetches, since we may be called repeatedly for individual | |
3470 | registers. So we cache the results, and mark the cache invalid | |
3471 | when the process is resumed. */ | |
c3f6f71d | 3472 | |
c906108c | 3473 | static void |
28439f5e PA |
3474 | procfs_fetch_registers (struct target_ops *ops, |
3475 | struct regcache *regcache, int regnum) | |
c906108c | 3476 | { |
772cf8be MK |
3477 | gdb_gregset_t *gregs; |
3478 | procinfo *pi; | |
3479 | int pid = PIDGET (inferior_ptid); | |
3480 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3481 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3482 | |
2689673f | 3483 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3484 | |
3485 | if (pi == NULL) | |
8a3fe4f8 | 3486 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3487 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3488 | |
772cf8be MK |
3489 | gregs = proc_get_gregs (pi); |
3490 | if (gregs == NULL) | |
c3f6f71d JM |
3491 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3492 | ||
56be3814 | 3493 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3494 | |
40a6adc1 | 3495 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3496 | { |
772cf8be MK |
3497 | gdb_fpregset_t *fpregs; |
3498 | ||
40a6adc1 MD |
3499 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3500 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3501 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3502 | return; /* Not a floating point register. */ |
c5aa993b | 3503 | |
772cf8be MK |
3504 | fpregs = proc_get_fpregs (pi); |
3505 | if (fpregs == NULL) | |
60054393 | 3506 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3507 | |
56be3814 | 3508 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3509 | } |
c906108c SS |
3510 | } |
3511 | ||
772cf8be MK |
3512 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3513 | this for all registers. | |
3514 | ||
3515 | NOTE: Since the /proc interface will not read individual registers, | |
3516 | we will cache these requests until the process is resumed, and only | |
3517 | then write them back to the inferior process. | |
77382aee | 3518 | |
772cf8be MK |
3519 | FIXME: is that a really bad idea? Have to think about cases where |
3520 | writing one register might affect the value of others, etc. */ | |
c906108c | 3521 | |
c3f6f71d | 3522 | static void |
28439f5e PA |
3523 | procfs_store_registers (struct target_ops *ops, |
3524 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3525 | { |
772cf8be MK |
3526 | gdb_gregset_t *gregs; |
3527 | procinfo *pi; | |
3528 | int pid = PIDGET (inferior_ptid); | |
3529 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3530 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3531 | |
2689673f | 3532 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3533 | |
3534 | if (pi == NULL) | |
8a3fe4f8 | 3535 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3536 | target_pid_to_str (inferior_ptid)); |
c906108c | 3537 | |
772cf8be MK |
3538 | gregs = proc_get_gregs (pi); |
3539 | if (gregs == NULL) | |
c3f6f71d | 3540 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3541 | |
56be3814 | 3542 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3543 | if (!proc_set_gregs (pi)) |
3544 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3545 | |
40a6adc1 | 3546 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3547 | { |
772cf8be MK |
3548 | gdb_fpregset_t *fpregs; |
3549 | ||
40a6adc1 MD |
3550 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3551 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3552 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3553 | return; /* Not a floating point register. */ |
60054393 | 3554 | |
772cf8be MK |
3555 | fpregs = proc_get_fpregs (pi); |
3556 | if (fpregs == NULL) | |
60054393 MS |
3557 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3558 | ||
56be3814 | 3559 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3560 | if (!proc_set_fpregs (pi)) |
3561 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3562 | } | |
c3f6f71d | 3563 | } |
c906108c | 3564 | |
37de36c6 KB |
3565 | static int |
3566 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3567 | { | |
37de36c6 KB |
3568 | #ifdef SYS_lwp_exit |
3569 | if (scall == SYS_lwp_exit) | |
3570 | return 1; | |
3571 | #endif | |
3572 | #ifdef SYS_lwpexit | |
3573 | if (scall == SYS_lwpexit) | |
3574 | return 1; | |
3575 | #endif | |
3576 | return 0; | |
3577 | } | |
3578 | ||
3579 | static int | |
3580 | syscall_is_exit (procinfo *pi, int scall) | |
3581 | { | |
3582 | #ifdef SYS_exit | |
3583 | if (scall == SYS_exit) | |
3584 | return 1; | |
3585 | #endif | |
3586 | #ifdef DYNAMIC_SYSCALLS | |
3587 | if (find_syscall (pi, "_exit") == scall) | |
3588 | return 1; | |
3589 | #endif | |
3590 | return 0; | |
3591 | } | |
3592 | ||
3593 | static int | |
3594 | syscall_is_exec (procinfo *pi, int scall) | |
3595 | { | |
3596 | #ifdef SYS_exec | |
3597 | if (scall == SYS_exec) | |
3598 | return 1; | |
3599 | #endif | |
3600 | #ifdef SYS_execv | |
3601 | if (scall == SYS_execv) | |
3602 | return 1; | |
3603 | #endif | |
3604 | #ifdef SYS_execve | |
3605 | if (scall == SYS_execve) | |
3606 | return 1; | |
3607 | #endif | |
3608 | #ifdef DYNAMIC_SYSCALLS | |
3609 | if (find_syscall (pi, "_execve")) | |
3610 | return 1; | |
3611 | if (find_syscall (pi, "ra_execve")) | |
3612 | return 1; | |
3613 | #endif | |
3614 | return 0; | |
3615 | } | |
3616 | ||
3617 | static int | |
3618 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3619 | { | |
3620 | #ifdef SYS_lwp_create | |
3621 | if (scall == SYS_lwp_create) | |
3622 | return 1; | |
3623 | #endif | |
3624 | #ifdef SYS_lwpcreate | |
3625 | if (scall == SYS_lwpcreate) | |
3626 | return 1; | |
3627 | #endif | |
3628 | return 0; | |
3629 | } | |
3630 | ||
7434dadd JB |
3631 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3632 | Does nothing if the breakpoint hasn't been inserted or has already | |
3633 | been removed. */ | |
3634 | ||
3635 | static void | |
3636 | remove_dbx_link_breakpoint (void) | |
3637 | { | |
3638 | if (dbx_link_bpt_addr == 0) | |
3639 | return; | |
3640 | ||
3641 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3642 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3643 | ||
3644 | dbx_link_bpt_addr = 0; | |
3645 | dbx_link_bpt = NULL; | |
3646 | } | |
3647 | ||
3648 | #ifdef SYS_syssgi | |
3649 | /* Return the address of the __dbx_link() function in the file | |
3650 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3651 | the symbol was not found. */ | |
3652 | ||
3653 | static CORE_ADDR | |
3654 | dbx_link_addr (bfd *abfd) | |
3655 | { | |
3656 | long storage_needed; | |
3657 | asymbol **symbol_table; | |
3658 | long number_of_symbols; | |
3659 | long i; | |
3660 | ||
3661 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3662 | if (storage_needed <= 0) | |
3663 | return 0; | |
3664 | ||
3665 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3666 | make_cleanup (xfree, symbol_table); | |
3667 | ||
3668 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3669 | ||
3670 | for (i = 0; i < number_of_symbols; i++) | |
3671 | { | |
3672 | asymbol *sym = symbol_table[i]; | |
3673 | ||
3674 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3675 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3676 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3677 | } |
3678 | ||
3679 | /* Symbol not found, return NULL. */ | |
3680 | return 0; | |
3681 | } | |
3682 | ||
3683 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3684 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3685 | and return nonzero. Return zero otherwise. */ |
3686 | ||
3687 | static int | |
3688 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3689 | { | |
3690 | bfd *abfd; | |
3691 | long storage_needed; | |
3692 | CORE_ADDR sym_addr; | |
3693 | ||
3694 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
3695 | if (abfd == NULL) | |
3696 | { | |
3697 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3698 | return 0; | |
3699 | } | |
3700 | ||
3701 | if (!bfd_check_format (abfd, bfd_object)) | |
3702 | { | |
3703 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3704 | symbol in it. */ |
7434dadd JB |
3705 | bfd_close (abfd); |
3706 | return 0; | |
3707 | } | |
3708 | ||
3709 | sym_addr = dbx_link_addr (abfd); | |
3710 | if (sym_addr != 0) | |
3711 | { | |
3712 | /* Insert the breakpoint. */ | |
3713 | dbx_link_bpt_addr = sym_addr; | |
3714 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3715 | sym_addr); | |
3716 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3717 | { |
3718 | warning (_("Failed to insert dbx_link breakpoint.")); | |
3719 | bfd_close (abfd); | |
3720 | return 0; | |
3721 | } | |
7434dadd JB |
3722 | bfd_close (abfd); |
3723 | return 1; | |
3724 | } | |
3725 | ||
3726 | bfd_close (abfd); | |
3727 | return 0; | |
3728 | } | |
3729 | ||
e294797a | 3730 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3731 | space in the process. The callback function receives an open file |
3732 | descriptor for the file corresponding to that mapped address space | |
3733 | (if there is one), and the base address of the mapped space. Quit | |
3734 | when the callback function returns a nonzero value, or at teh end | |
3735 | of the mappings. Returns the first non-zero return value of the | |
3736 | callback function, or zero. */ | |
e294797a JB |
3737 | |
3738 | static int | |
3739 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3740 | void *data) | |
3741 | { | |
3742 | procinfo *pi = data; | |
3743 | int fd; | |
3744 | ||
3745 | #ifdef NEW_PROC_API | |
3746 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3747 | ||
3748 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3749 | return -1; /* sanity */ | |
3750 | ||
3751 | if (map->pr_mapname[0] == 0) | |
3752 | { | |
3753 | fd = -1; /* no map file */ | |
3754 | } | |
3755 | else | |
3756 | { | |
3757 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3758 | /* Note: caller's responsibility to close this fd! */ | |
3759 | fd = open_with_retry (name, O_RDONLY); | |
3760 | /* Note: we don't test the above call for failure; | |
3761 | we just pass the FD on as given. Sometimes there is | |
3762 | no file, so the open may return failure, but that's | |
3763 | not a problem. */ | |
3764 | } | |
3765 | #else | |
3766 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3767 | /* Note: we don't test the above call for failure; | |
3768 | we just pass the FD on as given. Sometimes there is | |
3769 | no file, so the ioctl may return failure, but that's | |
3770 | not a problem. */ | |
3771 | #endif | |
3772 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3773 | } | |
3774 | ||
7434dadd JB |
3775 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3776 | insert a breakpoint at this location and return nonzero. Return | |
3777 | zero otherwise. */ | |
3778 | ||
3779 | static int | |
3780 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3781 | find_memory_region_ftype child_func, |
77382aee | 3782 | void *data) |
7434dadd JB |
3783 | { |
3784 | procinfo *pi = (procinfo *) data; | |
3785 | ||
3786 | /* We know the symbol we're looking for is in a text region, so | |
3787 | only look for it if the region is a text one. */ | |
3788 | if (map->pr_mflags & MA_EXEC) | |
3789 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3790 | ||
3791 | return 0; | |
3792 | } | |
3793 | ||
3794 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3795 | insert a breakpoint at its location, and return nonzero. Return zero | |
3796 | otherwise. */ | |
3797 | ||
3798 | static int | |
3799 | insert_dbx_link_breakpoint (procinfo *pi) | |
3800 | { | |
3801 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3802 | } | |
3803 | #endif | |
3804 | ||
77382aee PA |
3805 | /* Retrieve the next stop event from the child process. If child has |
3806 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3807 | (or possibly wait eventcodes) into gdb internal event codes. | |
3808 | Returns the id of process (and possibly thread) that incurred the | |
3809 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3810 | |
39f77062 | 3811 | static ptid_t |
117de6a9 | 3812 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3813 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3814 | { |
0df8b418 | 3815 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3816 | procinfo *pi; |
39f77062 KB |
3817 | int wstat; |
3818 | int temp_tid; | |
3819 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3820 | int why, what, flags; |
3821 | int retry = 0; | |
c906108c | 3822 | |
c3f6f71d | 3823 | wait_again: |
c906108c | 3824 | |
c3f6f71d JM |
3825 | retry++; |
3826 | wstat = 0; | |
39f77062 | 3827 | retval = pid_to_ptid (-1); |
c906108c | 3828 | |
0df8b418 | 3829 | /* Find procinfo for main process. */ |
39f77062 | 3830 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3831 | if (pi) |
c906108c | 3832 | { |
0df8b418 | 3833 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3834 | pi->status_valid = 0; |
3835 | pi->gregs_valid = 0; | |
3836 | pi->fpregs_valid = 0; | |
3837 | ||
0df8b418 | 3838 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3839 | flags = proc_flags (pi); |
3840 | why = proc_why (pi); | |
3841 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3842 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3843 | #endif |
3844 | /* If child is not stopped, wait for it to stop. */ | |
3845 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3846 | !proc_wait_for_stop (pi)) | |
c906108c | 3847 | { |
0df8b418 | 3848 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3849 | if (errno == ENOENT) |
c906108c | 3850 | { |
39f77062 KB |
3851 | int wait_retval; |
3852 | ||
0df8b418 MS |
3853 | /* /proc file not found; presumably child has terminated. */ |
3854 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3855 | |
0df8b418 | 3856 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
3e43a32a MS |
3857 | error (_("procfs: couldn't stop " |
3858 | "process %d: wait returned %d."), | |
39f77062 | 3859 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d | 3860 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3861 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3862 | retval = pid_to_ptid (wait_retval); |
c906108c | 3863 | } |
d1566ff5 FN |
3864 | else if (errno == EINTR) |
3865 | goto wait_again; | |
c3f6f71d | 3866 | else |
c906108c | 3867 | { |
0df8b418 | 3868 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3869 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3870 | } |
c3f6f71d JM |
3871 | } |
3872 | else | |
3873 | { | |
3874 | /* This long block is reached if either: | |
3875 | a) the child was already stopped, or | |
3876 | b) we successfully waited for the child with wait_for_stop. | |
3877 | This block will analyze the /proc status, and translate it | |
3878 | into a waitstatus for GDB. | |
3879 | ||
3880 | If we actually had to call wait because the /proc file | |
19958708 | 3881 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3882 | because we already have a waitstatus. */ |
3883 | ||
3884 | flags = proc_flags (pi); | |
3885 | why = proc_why (pi); | |
3886 | what = proc_what (pi); | |
3887 | ||
c3f6f71d | 3888 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3889 | { |
c3f6f71d JM |
3890 | #ifdef PR_ASYNC |
3891 | /* If it's running async (for single_thread control), | |
3892 | set it back to normal again. */ | |
3893 | if (flags & PR_ASYNC) | |
3894 | if (!proc_unset_async (pi)) | |
3895 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3896 | #endif | |
3897 | ||
3898 | if (info_verbose) | |
3899 | proc_prettyprint_why (why, what, 1); | |
3900 | ||
3901 | /* The 'pid' we will return to GDB is composed of | |
3902 | the process ID plus the lwp ID. */ | |
3903 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3904 | ||
3905 | switch (why) { | |
3906 | case PR_SIGNALLED: | |
3907 | wstat = (what << 8) | 0177; | |
3908 | break; | |
3909 | case PR_SYSENTRY: | |
37de36c6 | 3910 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3911 | { |
17faa917 DJ |
3912 | if (print_thread_events) |
3913 | printf_unfiltered (_("[%s exited]\n"), | |
3914 | target_pid_to_str (retval)); | |
37de36c6 KB |
3915 | delete_thread (retval); |
3916 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3917 | return retval; | |
3918 | } | |
3919 | else if (syscall_is_exit (pi, what)) | |
3920 | { | |
181e7f93 PA |
3921 | struct inferior *inf; |
3922 | ||
0df8b418 | 3923 | /* Handle SYS_exit call only. */ |
37de36c6 | 3924 | /* Stopped at entry to SYS_exit. |
19958708 | 3925 | Make it runnable, resume it, then use |
37de36c6 | 3926 | the wait system call to get its exit code. |
19958708 | 3927 | Proc_run_process always clears the current |
37de36c6 KB |
3928 | fault and signal. |
3929 | Then return its exit status. */ | |
3930 | pi->status_valid = 0; | |
3931 | wstat = 0; | |
19958708 | 3932 | /* FIXME: what we should do is return |
37de36c6 KB |
3933 | TARGET_WAITKIND_SPURIOUS. */ |
3934 | if (!proc_run_process (pi, 0, 0)) | |
3935 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3936 | |
3937 | inf = find_inferior_pid (pi->pid); | |
3938 | if (inf->attach_flag) | |
c3f6f71d | 3939 | { |
19958708 | 3940 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3941 | return a "success" exit code. Bogus: what if |
3942 | it returns something else? */ | |
3943 | wstat = 0; | |
39f77062 | 3944 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3945 | } |
3946 | else | |
3947 | { | |
3948 | int temp = wait (&wstat); | |
3949 | ||
3950 | /* FIXME: shouldn't I make sure I get the right | |
3951 | event from the right process? If (for | |
3952 | instance) I have killed an earlier inferior | |
3953 | process but failed to clean up after it | |
3954 | somehow, I could get its termination event | |
3955 | here. */ | |
3956 | ||
0df8b418 MS |
3957 | /* If wait returns -1, that's what we return |
3958 | to GDB. */ | |
37de36c6 | 3959 | if (temp < 0) |
39f77062 | 3960 | retval = pid_to_ptid (temp); |
c3f6f71d | 3961 | } |
c3f6f71d | 3962 | } |
37de36c6 KB |
3963 | else |
3964 | { | |
a3f17187 | 3965 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3966 | proc_prettyprint_syscall (proc_what (pi), 0); |
3967 | printf_filtered ("\n"); | |
3968 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3969 | { |
37de36c6 | 3970 | long i, nsysargs, *sysargs; |
c3f6f71d | 3971 | |
37de36c6 KB |
3972 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3973 | (sysargs = proc_sysargs (pi)) != NULL) | |
3974 | { | |
3e43a32a MS |
3975 | printf_filtered (_("%ld syscall arguments:\n"), |
3976 | nsysargs); | |
37de36c6 | 3977 | for (i = 0; i < nsysargs; i++) |
19958708 | 3978 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3979 | i, sysargs[i]); |
3980 | } | |
c3f6f71d | 3981 | |
c3f6f71d | 3982 | } |
c3f6f71d | 3983 | #endif |
37de36c6 KB |
3984 | if (status) |
3985 | { | |
0df8b418 MS |
3986 | /* How to exit gracefully, returning "unknown |
3987 | event". */ | |
37de36c6 | 3988 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3989 | return inferior_ptid; |
37de36c6 KB |
3990 | } |
3991 | else | |
3992 | { | |
3993 | /* How to keep going without returning to wfi: */ | |
39f77062 | 3994 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
3995 | goto wait_again; |
3996 | } | |
3997 | } | |
3998 | break; | |
3999 | case PR_SYSEXIT: | |
4000 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4001 | { |
37de36c6 KB |
4002 | /* Hopefully this is our own "fork-child" execing |
4003 | the real child. Hoax this event into a trap, and | |
4004 | GDB will see the child about to execute its start | |
0df8b418 | 4005 | address. */ |
37de36c6 KB |
4006 | wstat = (SIGTRAP << 8) | 0177; |
4007 | } | |
9185ddce | 4008 | #ifdef SYS_syssgi |
77382aee PA |
4009 | else if (what == SYS_syssgi) |
4010 | { | |
4011 | /* see if we can break on dbx_link(). If yes, then | |
4012 | we no longer need the SYS_syssgi notifications. */ | |
4013 | if (insert_dbx_link_breakpoint (pi)) | |
4014 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4015 | FLAG_RESET, 0); | |
4016 | ||
4017 | /* This is an internal event and should be transparent | |
4018 | to wfi, so resume the execution and wait again. See | |
4019 | comment in procfs_init_inferior() for more details. */ | |
4020 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4021 | goto wait_again; | |
4022 | } | |
9185ddce | 4023 | #endif |
37de36c6 KB |
4024 | else if (syscall_is_lwp_create (pi, what)) |
4025 | { | |
77382aee PA |
4026 | /* This syscall is somewhat like fork/exec. We |
4027 | will get the event twice: once for the parent | |
4028 | LWP, and once for the child. We should already | |
4029 | know about the parent LWP, but the child will | |
4030 | be new to us. So, whenever we get this event, | |
4031 | if it represents a new thread, simply add the | |
4032 | thread to the list. */ | |
c3f6f71d | 4033 | |
37de36c6 | 4034 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4035 | temp_tid = proc_get_current_thread (pi); |
4036 | if (!find_procinfo (pi->pid, temp_tid)) | |
4037 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4038 | |
39f77062 | 4039 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4040 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4041 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4042 | add_thread (temp_ptid); |
4043 | ||
0df8b418 | 4044 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 4045 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4046 | return inferior_ptid; |
37de36c6 KB |
4047 | } |
4048 | else if (syscall_is_lwp_exit (pi, what)) | |
4049 | { | |
17faa917 DJ |
4050 | if (print_thread_events) |
4051 | printf_unfiltered (_("[%s exited]\n"), | |
4052 | target_pid_to_str (retval)); | |
37de36c6 KB |
4053 | delete_thread (retval); |
4054 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4055 | return retval; | |
c3f6f71d | 4056 | } |
37de36c6 KB |
4057 | else if (0) |
4058 | { | |
4059 | /* FIXME: Do we need to handle SYS_sproc, | |
4060 | SYS_fork, or SYS_vfork here? The old procfs | |
4061 | seemed to use this event to handle threads on | |
4062 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4063 | that threads were actually separate processes. |
37de36c6 KB |
4064 | Irix, maybe? Anyway, low priority for now. */ |
4065 | } | |
4066 | else | |
4067 | { | |
a3f17187 | 4068 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4069 | proc_prettyprint_syscall (proc_what (pi), 0); |
4070 | printf_filtered ("\n"); | |
4071 | #ifndef PIOCSSPCACT | |
4072 | { | |
4073 | long i, nsysargs, *sysargs; | |
4074 | ||
4075 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4076 | (sysargs = proc_sysargs (pi)) != NULL) | |
4077 | { | |
77382aee PA |
4078 | printf_filtered (_("%ld syscall arguments:\n"), |
4079 | nsysargs); | |
37de36c6 | 4080 | for (i = 0; i < nsysargs; i++) |
19958708 | 4081 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4082 | i, sysargs[i]); |
4083 | } | |
4084 | } | |
c3f6f71d | 4085 | #endif |
37de36c6 | 4086 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4087 | return inferior_ptid; |
37de36c6 | 4088 | } |
c3f6f71d JM |
4089 | break; |
4090 | case PR_REQUESTED: | |
4091 | #if 0 /* FIXME */ | |
4092 | wstat = (SIGSTOP << 8) | 0177; | |
4093 | break; | |
4094 | #else | |
4095 | if (retry < 5) | |
4096 | { | |
a3f17187 | 4097 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4098 | pi->status_valid = 0; |
4099 | goto wait_again; | |
4100 | } | |
4101 | else | |
4102 | { | |
4103 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4104 | temp_tid = proc_get_current_thread (pi); |
4105 | if (!find_procinfo (pi->pid, temp_tid)) | |
4106 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4107 | |
4108 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4109 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4110 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4111 | add_thread (temp_ptid); |
c3f6f71d JM |
4112 | |
4113 | status->kind = TARGET_WAITKIND_STOPPED; | |
4114 | status->value.sig = 0; | |
4115 | return retval; | |
4116 | } | |
4117 | #endif | |
4118 | case PR_JOBCONTROL: | |
4119 | wstat = (what << 8) | 0177; | |
4120 | break; | |
4121 | case PR_FAULTED: | |
7af6341f | 4122 | switch (what) { |
c3f6f71d JM |
4123 | #ifdef FLTWATCH |
4124 | case FLTWATCH: | |
4125 | wstat = (SIGTRAP << 8) | 0177; | |
4126 | break; | |
4127 | #endif | |
4128 | #ifdef FLTKWATCH | |
4129 | case FLTKWATCH: | |
4130 | wstat = (SIGTRAP << 8) | 0177; | |
4131 | break; | |
4132 | #endif | |
0df8b418 | 4133 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 4134 | case FLTPRIV: |
0df8b418 | 4135 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4136 | case FLTILL: |
4137 | #endif | |
4138 | wstat = (SIGILL << 8) | 0177; | |
4139 | break; | |
4140 | case FLTBPT: | |
0df8b418 | 4141 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4142 | case FLTTRACE: |
4143 | #endif | |
77382aee PA |
4144 | /* If we hit our __dbx_link() internal breakpoint, |
4145 | then remove it. See comments in procfs_init_inferior() | |
4146 | for more details. */ | |
4147 | if (dbx_link_bpt_addr != 0 | |
4148 | && dbx_link_bpt_addr | |
fb14de7b | 4149 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 4150 | remove_dbx_link_breakpoint (); |
9185ddce | 4151 | |
c3f6f71d JM |
4152 | wstat = (SIGTRAP << 8) | 0177; |
4153 | break; | |
4154 | case FLTSTACK: | |
4155 | case FLTACCESS: | |
0df8b418 | 4156 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4157 | case FLTBOUNDS: |
4158 | #endif | |
4159 | wstat = (SIGSEGV << 8) | 0177; | |
4160 | break; | |
4161 | case FLTIOVF: | |
4162 | case FLTIZDIV: | |
0df8b418 | 4163 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4164 | case FLTFPE: |
4165 | #endif | |
4166 | wstat = (SIGFPE << 8) | 0177; | |
4167 | break; | |
3e43a32a | 4168 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
4169 | default: /* FIXME: use si_signo if possible for |
4170 | fault. */ | |
39f77062 | 4171 | retval = pid_to_ptid (-1); |
c3f6f71d | 4172 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4173 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4174 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4175 | error (_("... giving up...")); |
c3f6f71d JM |
4176 | break; |
4177 | } | |
4178 | break; /* case PR_FAULTED: */ | |
4179 | default: /* switch (why) unmatched */ | |
4180 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4181 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4182 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4183 | error (_("... giving up...")); |
c3f6f71d JM |
4184 | break; |
4185 | } | |
77382aee PA |
4186 | /* Got this far without error: If retval isn't in the |
4187 | threads database, add it. */ | |
39f77062 KB |
4188 | if (PIDGET (retval) > 0 && |
4189 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4190 | !in_thread_list (retval)) |
c906108c | 4191 | { |
77382aee PA |
4192 | /* We have a new thread. We need to add it both to |
4193 | GDB's list and to our own. If we don't create a | |
4194 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
4195 | add_thread (retval); |
4196 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4197 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4198 | } |
c906108c | 4199 | } |
0df8b418 | 4200 | else /* Flags do not indicate STOPPED. */ |
c906108c | 4201 | { |
0df8b418 | 4202 | /* surely this can't happen... */ |
c3f6f71d JM |
4203 | printf_filtered ("procfs:%d -- process not stopped.\n", |
4204 | __LINE__); | |
4205 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4206 | error (_("procfs: ...giving up...")); |
c906108c | 4207 | } |
c906108c | 4208 | } |
c906108c | 4209 | |
c3f6f71d JM |
4210 | if (status) |
4211 | store_waitstatus (status, wstat); | |
c906108c SS |
4212 | } |
4213 | ||
c3f6f71d JM |
4214 | return retval; |
4215 | } | |
c906108c | 4216 | |
4e73f23d RM |
4217 | /* Perform a partial transfer to/from the specified object. For |
4218 | memory transfers, fall back to the old memory xfer functions. */ | |
4219 | ||
4220 | static LONGEST | |
4221 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4222 | const char *annex, gdb_byte *readbuf, |
4223 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4224 | { |
4225 | switch (object) | |
4226 | { | |
4227 | case TARGET_OBJECT_MEMORY: | |
4228 | if (readbuf) | |
0b62613e PA |
4229 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4230 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4231 | if (writebuf) |
0b62613e PA |
4232 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4233 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4234 | return -1; |
4235 | ||
4236 | #ifdef NEW_PROC_API | |
4237 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4238 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4239 | offset, len); |
4240 | #endif | |
4241 | ||
4242 | default: | |
4243 | if (ops->beneath != NULL) | |
4244 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4245 | readbuf, writebuf, offset, len); | |
4246 | return -1; | |
4247 | } | |
4248 | } | |
4249 | ||
4250 | ||
d0849a9a KB |
4251 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4252 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4253 | otherwise transfer them from the target. TARGET is unused. | |
4254 | ||
4255 | The return value is 0 if an error occurred or no bytes were | |
4256 | transferred. Otherwise, it will be a positive value which | |
4257 | indicates the number of bytes transferred between gdb and the | |
4258 | target. (Note that the interface also makes provisions for | |
0df8b418 | 4259 | negative values, but this capability isn't implemented here.) */ |
d0849a9a | 4260 | |
c3f6f71d | 4261 | static int |
0b62613e | 4262 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4263 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4264 | { |
4265 | procinfo *pi; | |
4266 | int nbytes = 0; | |
c906108c | 4267 | |
0df8b418 | 4268 | /* Find procinfo for main process. */ |
39f77062 | 4269 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4270 | if (pi->as_fd == 0 && |
4271 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4272 | { |
c3f6f71d JM |
4273 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4274 | return 0; | |
c906108c | 4275 | } |
c906108c | 4276 | |
c3f6f71d | 4277 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4278 | { |
c3f6f71d | 4279 | if (dowrite) |
c906108c | 4280 | { |
c3f6f71d | 4281 | #ifdef NEW_PROC_API |
cce7e648 | 4282 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4283 | #else |
cce7e648 | 4284 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4285 | #endif |
c3f6f71d | 4286 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4287 | } |
c3f6f71d | 4288 | else |
c906108c | 4289 | { |
cce7e648 | 4290 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4291 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4292 | } |
c3f6f71d | 4293 | if (nbytes < 0) |
c906108c | 4294 | { |
c3f6f71d | 4295 | nbytes = 0; |
c906108c | 4296 | } |
c906108c | 4297 | } |
c3f6f71d | 4298 | return nbytes; |
c906108c SS |
4299 | } |
4300 | ||
77382aee PA |
4301 | /* Called by target_resume before making child runnable. Mark cached |
4302 | registers and status's invalid. If there are "dirty" caches that | |
4303 | need to be written back to the child process, do that. | |
c906108c | 4304 | |
77382aee PA |
4305 | File descriptors are also cached. As they are a limited resource, |
4306 | we cannot hold onto them indefinitely. However, as they are | |
4307 | expensive to open, we don't want to throw them away | |
4308 | indescriminately either. As a compromise, we will keep the file | |
4309 | descriptors for the parent process, but discard any file | |
4310 | descriptors we may have accumulated for the threads. | |
4311 | ||
4312 | As this function is called by iterate_over_threads, it always | |
4313 | returns zero (so that iterate_over_threads will keep | |
4314 | iterating). */ | |
c3f6f71d JM |
4315 | |
4316 | static int | |
fba45db2 | 4317 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4318 | { |
77382aee PA |
4319 | /* About to run the child; invalidate caches and do any other |
4320 | cleanup. */ | |
c906108c | 4321 | |
c3f6f71d JM |
4322 | #if 0 |
4323 | if (pi->gregs_dirty) | |
4324 | if (parent == NULL || | |
4325 | proc_get_current_thread (parent) != pi->tid) | |
4326 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4327 | proc_warn (pi, "target_resume, set_gregs", | |
4328 | __LINE__); | |
a97b0ac8 | 4329 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4330 | if (pi->fpregs_dirty) |
4331 | if (parent == NULL || | |
4332 | proc_get_current_thread (parent) != pi->tid) | |
4333 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4334 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4335 | __LINE__); |
c906108c | 4336 | #endif |
c906108c | 4337 | |
c3f6f71d | 4338 | if (parent != NULL) |
c906108c | 4339 | { |
c3f6f71d | 4340 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4341 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4342 | We don't do this to the master (parent) procinfo. */ |
4343 | ||
4344 | close_procinfo_files (pi); | |
c906108c | 4345 | } |
c3f6f71d JM |
4346 | pi->gregs_valid = 0; |
4347 | pi->fpregs_valid = 0; | |
4348 | #if 0 | |
4349 | pi->gregs_dirty = 0; | |
4350 | pi->fpregs_dirty = 0; | |
c906108c | 4351 | #endif |
c3f6f71d JM |
4352 | pi->status_valid = 0; |
4353 | pi->threads_valid = 0; | |
c906108c | 4354 | |
c3f6f71d | 4355 | return 0; |
c906108c SS |
4356 | } |
4357 | ||
0fda6bd2 | 4358 | #if 0 |
77382aee PA |
4359 | /* A callback function for iterate_over_threads. Find the |
4360 | asynchronous signal thread, and make it runnable. See if that | |
4361 | helps matters any. */ | |
c906108c | 4362 | |
c3f6f71d | 4363 | static int |
fba45db2 | 4364 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4365 | { |
c3f6f71d JM |
4366 | #ifdef PR_ASLWP |
4367 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4368 | { |
c3f6f71d JM |
4369 | if (!proc_run_process (pi, 0, -1)) |
4370 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4371 | return 1; | |
c906108c | 4372 | } |
c906108c | 4373 | #endif |
c3f6f71d | 4374 | return 0; |
c906108c | 4375 | } |
0fda6bd2 | 4376 | #endif |
c906108c | 4377 | |
77382aee PA |
4378 | /* Make the child process runnable. Normally we will then call |
4379 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4380 | ||
4381 | If STEP is true, then arrange for the child to stop again after | |
4382 | executing a single instruction. If SIGNO is zero, then cancel any | |
4383 | pending signal; if non-zero, then arrange for the indicated signal | |
4384 | to be delivered to the child when it runs. If PID is -1, then | |
4385 | allow any child thread to run; if non-zero, then allow only the | |
4386 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4387 | |
4388 | static void | |
28439f5e PA |
4389 | procfs_resume (struct target_ops *ops, |
4390 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4391 | { |
c3f6f71d JM |
4392 | procinfo *pi, *thread; |
4393 | int native_signo; | |
4394 | ||
19958708 | 4395 | /* 2.1: |
c3f6f71d | 4396 | prrun.prflags |= PRSVADDR; |
19958708 | 4397 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4398 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4399 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4400 | prrun.prflags |= PRCFAULT; clear current fault. |
4401 | ||
4402 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4403 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4404 | PRSVADDR is unnecessary. |
4405 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4406 | This basically leaves PRSTEP and PRCSIG. | |
4407 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4408 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4409 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4410 | |
0df8b418 | 4411 | /* Find procinfo for main process. */ |
39f77062 | 4412 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4413 | |
77382aee | 4414 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4415 | errno = 0; |
c906108c | 4416 | |
c3f6f71d JM |
4417 | /* Convert signal to host numbering. */ |
4418 | if (signo == 0 || | |
0fda6bd2 | 4419 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4420 | native_signo = 0; |
4421 | else | |
4422 | native_signo = target_signal_to_host (signo); | |
c906108c | 4423 | |
c3f6f71d | 4424 | pi->ignore_next_sigstop = 0; |
c906108c | 4425 | |
77382aee PA |
4426 | /* Running the process voids all cached registers and status. */ |
4427 | /* Void the threads' caches first. */ | |
19958708 | 4428 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4429 | /* Void the process procinfo's caches. */ |
4430 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4431 | |
39f77062 | 4432 | if (PIDGET (ptid) != -1) |
c906108c | 4433 | { |
77382aee PA |
4434 | /* Resume a specific thread, presumably suppressing the |
4435 | others. */ | |
39f77062 | 4436 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4437 | if (thread != NULL) |
c906108c | 4438 | { |
c3f6f71d JM |
4439 | if (thread->tid != 0) |
4440 | { | |
77382aee PA |
4441 | /* We're to resume a specific thread, and not the |
4442 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4443 | #ifdef PR_ASYNC |
4444 | if (!proc_set_async (pi)) | |
4445 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4446 | #endif | |
4447 | #if 0 | |
19958708 | 4448 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4449 | make_signal_thread_runnable, |
4450 | NULL); | |
4451 | #endif | |
0df8b418 MS |
4452 | pi = thread; /* Substitute the thread's procinfo |
4453 | for run. */ | |
c3f6f71d | 4454 | } |
c906108c SS |
4455 | } |
4456 | } | |
c906108c | 4457 | |
c3f6f71d | 4458 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4459 | { |
c3f6f71d | 4460 | if (errno == EBUSY) |
77382aee PA |
4461 | warning (_("resume: target already running. " |
4462 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4463 | else |
4464 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4465 | } |
c3f6f71d | 4466 | } |
c906108c | 4467 | |
77382aee | 4468 | /* Set up to trace signals in the child process. */ |
c906108c | 4469 | |
c3f6f71d | 4470 | static void |
2455069d | 4471 | procfs_pass_signals (int numsigs, unsigned char *pass_signals) |
c3f6f71d | 4472 | { |
37de36c6 | 4473 | gdb_sigset_t signals; |
2455069d UW |
4474 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
4475 | int signo; | |
c906108c | 4476 | |
2455069d UW |
4477 | prfillset (&signals); |
4478 | ||
4479 | for (signo = 0; signo < NSIG; signo++) | |
4480 | { | |
4481 | int target_signo = target_signal_from_host (signo); | |
4482 | if (target_signo < numsigs && pass_signals[target_signo]) | |
4483 | gdb_prdelset (&signals, signo); | |
4484 | } | |
4485 | ||
4486 | if (!proc_set_traced_signals (pi, &signals)) | |
4487 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4488 | } |
c906108c | 4489 | |
77382aee | 4490 | /* Print status information about the child process. */ |
c906108c | 4491 | |
c3f6f71d | 4492 | static void |
fba45db2 | 4493 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4494 | { |
181e7f93 | 4495 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4496 | |
a3f17187 | 4497 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4498 | inf->attach_flag? "attached": "child", |
39f77062 | 4499 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4500 | } |
c906108c | 4501 | |
77382aee PA |
4502 | /* Stop the child process asynchronously, as when the gdb user types |
4503 | control-c or presses a "stop" button. Works by sending | |
4504 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4505 | |
c3f6f71d | 4506 | static void |
f9c72d52 | 4507 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4508 | { |
7e1789f5 | 4509 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4510 | } |
4511 | ||
77382aee PA |
4512 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4513 | should only be applied to the real process, not to an LWP, because | |
4514 | of the check for parent-process. If we need this to work for an | |
4515 | LWP, it needs some more logic. */ | |
c906108c | 4516 | |
c3f6f71d | 4517 | static void |
fba45db2 | 4518 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4519 | { |
4520 | int parent_pid; | |
c906108c | 4521 | |
c3f6f71d JM |
4522 | parent_pid = proc_parent_pid (pi); |
4523 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4524 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4525 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4526 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4527 | file for the inferior. */ | |
4528 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4529 | { | |
4530 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4531 | } | |
4532 | #endif | |
4533 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4534 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4535 | to kill the inferior, otherwise it might remain stopped with a | |
4536 | pending SIGKILL. | |
4537 | We do not check the result of the PIOCSSIG, the inferior might have | |
4538 | died already. */ | |
4539 | { | |
37de36c6 | 4540 | gdb_siginfo_t newsiginfo; |
c906108c | 4541 | |
c3f6f71d JM |
4542 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4543 | newsiginfo.si_signo = SIGKILL; | |
4544 | newsiginfo.si_code = 0; | |
4545 | newsiginfo.si_errno = 0; | |
4546 | newsiginfo.si_pid = getpid (); | |
4547 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4548 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4549 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4550 | } | |
4551 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4552 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4553 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4554 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4555 | destroy_procinfo (pi); | |
c906108c | 4556 | |
c3f6f71d JM |
4557 | /* If pi is GDB's child, wait for it to die. */ |
4558 | if (parent_pid == getpid ()) | |
19958708 | 4559 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4560 | Should we check the returned event? */ |
4561 | { | |
0d06e24b | 4562 | #if 0 |
c3f6f71d | 4563 | int status, ret; |
c906108c | 4564 | |
c3f6f71d JM |
4565 | ret = waitpid (pi->pid, &status, 0); |
4566 | #else | |
4567 | wait (NULL); | |
4568 | #endif | |
4569 | } | |
4570 | } | |
c906108c | 4571 | |
77382aee PA |
4572 | /* We're done debugging it, and we want it to go away. Then we want |
4573 | GDB to forget all about it. */ | |
c906108c | 4574 | |
19958708 | 4575 | static void |
7d85a9c0 | 4576 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4577 | { |
39f77062 | 4578 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4579 | { |
0df8b418 | 4580 | /* Find procinfo for main process. */ |
39f77062 | 4581 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4582 | |
c3f6f71d JM |
4583 | if (pi) |
4584 | unconditionally_kill_inferior (pi); | |
4585 | target_mourn_inferior (); | |
c906108c | 4586 | } |
c3f6f71d JM |
4587 | } |
4588 | ||
77382aee | 4589 | /* Forget we ever debugged this thing! */ |
c906108c | 4590 | |
19958708 | 4591 | static void |
136d6dae | 4592 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4593 | { |
4594 | procinfo *pi; | |
c906108c | 4595 | |
39f77062 | 4596 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4597 | { |
0df8b418 | 4598 | /* Find procinfo for main process. */ |
39f77062 | 4599 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4600 | if (pi) |
4601 | destroy_procinfo (pi); | |
c906108c | 4602 | } |
28439f5e | 4603 | unpush_target (ops); |
8181d85f DJ |
4604 | |
4605 | if (dbx_link_bpt != NULL) | |
4606 | { | |
a6d9a66e | 4607 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4608 | dbx_link_bpt_addr = 0; |
4609 | dbx_link_bpt = NULL; | |
4610 | } | |
4611 | ||
c3f6f71d JM |
4612 | generic_mourn_inferior (); |
4613 | } | |
c906108c | 4614 | |
77382aee PA |
4615 | /* When GDB forks to create a runnable inferior process, this function |
4616 | is called on the parent side of the fork. It's job is to do | |
4617 | whatever is necessary to make the child ready to be debugged, and | |
4618 | then wait for the child to synchronize. */ | |
c906108c | 4619 | |
19958708 | 4620 | static void |
28439f5e | 4621 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4622 | { |
4623 | procinfo *pi; | |
37de36c6 | 4624 | gdb_sigset_t signals; |
c3f6f71d | 4625 | int fail; |
2689673f | 4626 | int lwpid; |
c906108c | 4627 | |
c3f6f71d JM |
4628 | /* This routine called on the parent side (GDB side) |
4629 | after GDB forks the inferior. */ | |
28439f5e | 4630 | push_target (ops); |
c906108c | 4631 | |
c3f6f71d | 4632 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4633 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4634 | |
4635 | if (!open_procinfo_files (pi, FD_CTL)) | |
4636 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4637 | ||
4638 | /* | |
4639 | xmalloc // done | |
4640 | open_procinfo_files // done | |
4641 | link list // done | |
4642 | prfillset (trace) | |
4643 | procfs_notice_signals | |
4644 | prfillset (fault) | |
4645 | prdelset (FLTPAGE) | |
4646 | PIOCWSTOP | |
4647 | PIOCSFAULT | |
4648 | */ | |
4649 | ||
77382aee | 4650 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4651 | if (!(proc_flags (pi) & PR_STOPPED) && |
4652 | !(proc_wait_for_stop (pi))) | |
4653 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4654 | ||
4655 | /* Save some of the /proc state to be restored if we detach. */ | |
4656 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4657 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4658 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4659 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4660 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4661 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4662 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4663 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4664 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4665 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4666 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4667 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4668 | ||
c3f6f71d JM |
4669 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4670 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4671 | ||
0d06e24b JM |
4672 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4673 | and possibly even turning ON kill-on-last-close at this point. But | |
4674 | I can't make that change without careful testing which I don't have | |
4675 | time to do right now... */ | |
c3f6f71d JM |
4676 | /* Turn on run-on-last-close flag so that the child |
4677 | will die if GDB goes away for some reason. */ | |
4678 | if (!proc_set_run_on_last_close (pi)) | |
4679 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4680 | ||
2689673f PA |
4681 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4682 | lwpid = proc_get_current_thread (pi); | |
4683 | ||
4684 | /* Create a procinfo for the main lwp. */ | |
4685 | create_procinfo (pid, lwpid); | |
4686 | ||
4687 | /* We already have a main thread registered in the thread table at | |
4688 | this point, but it didn't have any lwp info yet. Notify the core | |
4689 | about it. This changes inferior_ptid as well. */ | |
4690 | thread_change_ptid (pid_to_ptid (pid), | |
4691 | MERGEPID (pid, lwpid)); | |
c906108c | 4692 | |
46ac7a5d AC |
4693 | /* Typically two, one trap to exec the shell, one to exec the |
4694 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4695 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4696 | |
4697 | #ifdef SYS_syssgi | |
4698 | /* On mips-irix, we need to stop the inferior early enough during | |
4699 | the startup phase in order to be able to load the shared library | |
4700 | symbols and insert the breakpoints that are located in these shared | |
4701 | libraries. Stopping at the program entry point is not good enough | |
4702 | because the -init code is executed before the execution reaches | |
4703 | that point. | |
4704 | ||
4705 | So what we need to do is to insert a breakpoint in the runtime | |
4706 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4707 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4708 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4709 | as rld is not part of the executable we are running, and thus we need |
4710 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4711 | |
9185ddce JB |
4712 | For this, we trace all syssgi() syscall exit events. Each time |
4713 | we detect such an event, we iterate over each text memory maps, | |
4714 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4715 | When found, we know that rld has been mapped, and that we can insert | |
4716 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4717 | has been inserted, the syssgi() notifications are no longer necessary, | |
4718 | so they should be canceled. */ | |
4719 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4720 | #endif |
c3f6f71d | 4721 | } |
c906108c | 4722 | |
77382aee PA |
4723 | /* When GDB forks to create a new process, this function is called on |
4724 | the child side of the fork before GDB exec's the user program. Its | |
4725 | job is to make the child minimally debuggable, so that the parent | |
4726 | GDB process can connect to the child and take over. This function | |
4727 | should do only the minimum to make that possible, and to | |
4728 | synchronize with the parent process. The parent process should | |
4729 | take care of the details. */ | |
c3f6f71d JM |
4730 | |
4731 | static void | |
fba45db2 | 4732 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4733 | { |
4734 | /* This routine called on the child side (inferior side) | |
4735 | after GDB forks the inferior. It must use only local variables, | |
4736 | because it may be sharing data space with its parent. */ | |
c906108c | 4737 | |
c3f6f71d | 4738 | procinfo *pi; |
37de36c6 | 4739 | sysset_t *exitset; |
c906108c | 4740 | |
c3f6f71d | 4741 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4742 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4743 | |
c3f6f71d JM |
4744 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4745 | { | |
4746 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4747 | gdb_flush (gdb_stderr); | |
77382aee PA |
4748 | /* No need to call "dead_procinfo", because we're going to |
4749 | exit. */ | |
c3f6f71d JM |
4750 | _exit (127); |
4751 | } | |
c906108c | 4752 | |
c3f6f71d JM |
4753 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4754 | /* OSF method for tracing exec syscalls. Quoting: | |
4755 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4756 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4757 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4758 | { |
4759 | int prfs_flags; | |
c906108c | 4760 | |
c3f6f71d JM |
4761 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4762 | { | |
4763 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4764 | gdb_flush (gdb_stderr); | |
4765 | _exit (127); | |
4766 | } | |
4767 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4768 | |
c3f6f71d JM |
4769 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4770 | { | |
4771 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4772 | gdb_flush (gdb_stderr); | |
4773 | _exit (127); | |
4774 | } | |
4775 | } | |
4776 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4777 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4778 | /* GW: Rationale... |
4779 | Not all systems with /proc have all the exec* syscalls with the same | |
4780 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4781 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4782 | |
37de36c6 KB |
4783 | exitset = sysset_t_alloc (pi); |
4784 | gdb_premptysysset (exitset); | |
c3f6f71d | 4785 | #ifdef SYS_exec |
37de36c6 | 4786 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4787 | #endif |
4788 | #ifdef SYS_execve | |
37de36c6 | 4789 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4790 | #endif |
4791 | #ifdef SYS_execv | |
37de36c6 | 4792 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4793 | #endif |
37de36c6 KB |
4794 | #ifdef DYNAMIC_SYSCALLS |
4795 | { | |
4796 | int callnum = find_syscall (pi, "execve"); | |
4797 | ||
4798 | if (callnum >= 0) | |
4799 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4800 | |
37de36c6 KB |
4801 | callnum = find_syscall (pi, "ra_execve"); |
4802 | if (callnum >= 0) | |
4803 | gdb_praddsysset (exitset, callnum); | |
4804 | } | |
4805 | #endif /* DYNAMIC_SYSCALLS */ | |
4806 | ||
4807 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4808 | { |
c3f6f71d JM |
4809 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4810 | gdb_flush (gdb_stderr); | |
4811 | _exit (127); | |
c906108c | 4812 | } |
c3f6f71d JM |
4813 | #endif /* PRFS_STOPEXEC */ |
4814 | ||
0df8b418 | 4815 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4816 | /* Turn off inherit on fork flag so that all grand-children |
4817 | of gdb start with tracing flags cleared. */ | |
4818 | if (!proc_unset_inherit_on_fork (pi)) | |
4819 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4820 | ||
4821 | /* Turn off run on last close flag, so that the child process | |
4822 | cannot run away just because we close our handle on it. | |
4823 | We want it to wait for the parent to attach. */ | |
4824 | if (!proc_unset_run_on_last_close (pi)) | |
4825 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4826 | ||
19958708 | 4827 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4828 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4829 | /*destroy_procinfo (pi);*/ |
c906108c | 4830 | } |
c906108c | 4831 | |
77382aee PA |
4832 | /* This function is called BEFORE gdb forks the inferior process. Its |
4833 | only real responsibility is to set things up for the fork, and tell | |
4834 | GDB which two functions to call after the fork (one for the parent, | |
4835 | and one for the child). | |
4836 | ||
4837 | This function does a complicated search for a unix shell program, | |
4838 | which it then uses to parse arguments and environment variables to | |
4839 | be sent to the child. I wonder whether this code could not be | |
4840 | abstracted out and shared with other unix targets such as | |
4841 | inf-ptrace? */ | |
c906108c SS |
4842 | |
4843 | static void | |
136d6dae VP |
4844 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4845 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4846 | { |
4847 | char *shell_file = getenv ("SHELL"); | |
4848 | char *tryname; | |
28439f5e PA |
4849 | int pid; |
4850 | ||
c906108c SS |
4851 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4852 | { | |
4853 | ||
4854 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4855 | just do this the normal way (via execlp, which operates by |
4856 | attempting an exec for each element of the PATH until it | |
4857 | finds one which succeeds), then there will be an exec for | |
4858 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4859 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4860 | for these failed execs with the ones for successful execs | |
4861 | (whether the exec has succeeded is stored at that time in the | |
4862 | carry bit or some such architecture-specific and | |
4863 | non-ABI-specified place). | |
4864 | ||
4865 | So I can't think of anything better than to search the PATH | |
4866 | now. This has several disadvantages: (1) There is a race | |
4867 | condition; if we find a file now and it is deleted before we | |
4868 | exec it, we lose, even if the deletion leaves a valid file | |
4869 | further down in the PATH, (2) there is no way to know exactly | |
4870 | what an executable (in the sense of "capable of being | |
4871 | exec'd") file is. Using access() loses because it may lose | |
4872 | if the caller is the superuser; failing to use it loses if | |
4873 | there are ACLs or some such. */ | |
c906108c SS |
4874 | |
4875 | char *p; | |
4876 | char *p1; | |
4877 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4878 | path is used from within GDB. */ |
c906108c SS |
4879 | char *path = getenv ("PATH"); |
4880 | int len; | |
4881 | struct stat statbuf; | |
4882 | ||
4883 | if (path == NULL) | |
4884 | path = "/bin:/usr/bin"; | |
4885 | ||
4886 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4887 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4888 | { |
4889 | p1 = strchr (p, ':'); | |
4890 | if (p1 != NULL) | |
4891 | len = p1 - p; | |
4892 | else | |
4893 | len = strlen (p); | |
4894 | strncpy (tryname, p, len); | |
4895 | tryname[len] = '\0'; | |
4896 | strcat (tryname, "/"); | |
4897 | strcat (tryname, shell_file); | |
4898 | if (access (tryname, X_OK) < 0) | |
4899 | continue; | |
4900 | if (stat (tryname, &statbuf) < 0) | |
4901 | continue; | |
4902 | if (!S_ISREG (statbuf.st_mode)) | |
4903 | /* We certainly need to reject directories. I'm not quite | |
4904 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4905 | that people want to exec() these things. */ | |
4906 | continue; | |
4907 | break; | |
4908 | } | |
4909 | if (p == NULL) | |
4910 | /* Not found. This must be an error rather than merely passing | |
4911 | the file to execlp(), because execlp() would try all the | |
4912 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4913 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4914 | __LINE__, shell_file); |
c906108c SS |
4915 | |
4916 | shell_file = tryname; | |
4917 | } | |
4918 | ||
28439f5e | 4919 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4920 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4921 | |
4922 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4923 | } |
4924 | ||
4925 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4926 | |
27087a3d JB |
4927 | static void |
4928 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4929 | { | |
9185ddce | 4930 | #ifdef SYS_syssgi |
77382aee | 4931 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4932 | They should normally have been removed by now, but they may still |
4933 | be activated if the inferior doesn't use shared libraries, or if | |
4934 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4935 | See procfs_init_inferior() for more details. |
4936 | ||
4937 | Since these notifications are only ever enabled when we spawned | |
4938 | the inferior ourselves, there is nothing to do when the inferior | |
4939 | was created by attaching to an already running process, or when | |
4940 | debugging a core file. */ | |
4941 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4942 | return; | |
4943 | ||
9185ddce | 4944 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4945 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4946 | #endif |
c906108c SS |
4947 | } |
4948 | ||
77382aee | 4949 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4950 | |
c3f6f71d | 4951 | static int |
fba45db2 | 4952 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4953 | { |
39f77062 | 4954 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4955 | |
2689673f | 4956 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4957 | add_thread (gdb_threadid); |
c906108c | 4958 | |
c3f6f71d JM |
4959 | return 0; |
4960 | } | |
4961 | ||
77382aee PA |
4962 | /* Query all the threads that the target knows about, and give them |
4963 | back to GDB to add to its list. */ | |
c3f6f71d JM |
4964 | |
4965 | void | |
28439f5e | 4966 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4967 | { |
4968 | procinfo *pi; | |
4969 | ||
0df8b418 | 4970 | /* Find procinfo for main process. */ |
39f77062 | 4971 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4972 | proc_update_threads (pi); |
4973 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4974 | } |
4975 | ||
77382aee PA |
4976 | /* Return true if the thread is still 'alive'. This guy doesn't |
4977 | really seem to be doing his job. Got to investigate how to tell | |
4978 | when a thread is really gone. */ | |
c906108c | 4979 | |
c906108c | 4980 | static int |
28439f5e | 4981 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4982 | { |
c3f6f71d JM |
4983 | int proc, thread; |
4984 | procinfo *pi; | |
c906108c | 4985 | |
39f77062 KB |
4986 | proc = PIDGET (ptid); |
4987 | thread = TIDGET (ptid); | |
0df8b418 | 4988 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4989 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4990 | return 0; | |
4991 | ||
4992 | /* If I can't get its status, it ain't alive! | |
4993 | What's more, I need to forget about it! */ | |
4994 | if (!proc_get_status (pi)) | |
4995 | { | |
4996 | destroy_procinfo (pi); | |
4997 | return 0; | |
4998 | } | |
77382aee PA |
4999 | /* I couldn't have got its status if it weren't alive, so it's |
5000 | alive. */ | |
c3f6f71d | 5001 | return 1; |
c906108c | 5002 | } |
c3f6f71d | 5003 | |
77382aee PA |
5004 | /* Convert PTID to a string. Returns the string in a static |
5005 | buffer. */ | |
c3f6f71d JM |
5006 | |
5007 | char * | |
117de6a9 | 5008 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5009 | { |
5010 | static char buf[80]; | |
c3f6f71d | 5011 | |
5240ceac MK |
5012 | if (TIDGET (ptid) == 0) |
5013 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5014 | else |
21749010 | 5015 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5016 | |
5017 | return buf; | |
c3f6f71d JM |
5018 | } |
5019 | ||
77382aee | 5020 | /* Insert a watchpoint. */ |
c3f6f71d | 5021 | |
19958708 | 5022 | int |
39f77062 | 5023 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 5024 | int after) |
c906108c | 5025 | { |
c3f6f71d | 5026 | #ifndef UNIXWARE |
37de36c6 | 5027 | #ifndef AIX5 |
c3f6f71d | 5028 | int pflags = 0; |
19958708 | 5029 | procinfo *pi; |
c3f6f71d | 5030 | |
19958708 | 5031 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5032 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d | 5033 | |
0df8b418 MS |
5034 | /* Translate from GDB's flags to /proc's. */ |
5035 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 5036 | { |
0df8b418 | 5037 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
5038 | case hw_write: /* default watchpoint (write) */ |
5039 | pflags = WRITE_WATCHFLAG; | |
5040 | break; | |
5041 | case hw_read: /* read watchpoint */ | |
5042 | pflags = READ_WATCHFLAG; | |
5043 | break; | |
5044 | case hw_access: /* access watchpoint */ | |
5045 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5046 | break; | |
5047 | case hw_execute: /* execution HW breakpoint */ | |
5048 | pflags = EXEC_WATCHFLAG; | |
5049 | break; | |
0df8b418 | 5050 | default: /* Something weird. Return error. */ |
c906108c | 5051 | return -1; |
c3f6f71d | 5052 | } |
0df8b418 | 5053 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
5054 | pflags |= AFTER_WATCHFLAG; |
5055 | } | |
5056 | ||
5057 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5058 | { | |
0df8b418 | 5059 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
5060 | return -1; /* fail */ |
5061 | /* GDB may try to remove the same watchpoint twice. | |
5062 | If a remove request returns no match, don't error. */ | |
c906108c | 5063 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5064 | return 0; /* ignore */ |
5065 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5066 | } |
37de36c6 KB |
5067 | #endif /* AIX5 */ |
5068 | #endif /* UNIXWARE */ | |
c906108c SS |
5069 | return 0; |
5070 | } | |
5071 | ||
1e03ad20 KB |
5072 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5073 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5074 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5075 | far. | |
19958708 | 5076 | |
1e03ad20 KB |
5077 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5078 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5079 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5080 | |
5081 | static int | |
5082 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5083 | { | |
1e03ad20 KB |
5084 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5085 | and target pointers must be of the same size. If they are not, | |
5086 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5087 | fact that proc_set_watchpoint() calls |
5088 | procfs_address_to_host_pointer(); a close inspection of | |
5089 | procfs_address_to_host_pointer will reveal that an internal error | |
5090 | will be generated when the host and target pointer sizes are | |
5091 | different. */ | |
4e906f53 | 5092 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
f4a14ae6 | 5093 | |
4e906f53 | 5094 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
5095 | return 0; |
5096 | ||
5097 | /* Other tests here??? */ | |
5098 | ||
5099 | return 1; | |
1e03ad20 KB |
5100 | } |
5101 | ||
77382aee PA |
5102 | /* Returns non-zero if process is stopped on a hardware watchpoint |
5103 | fault, else returns zero. */ | |
c3f6f71d | 5104 | |
25513619 PA |
5105 | static int |
5106 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5107 | { |
c3f6f71d | 5108 | procinfo *pi; |
c906108c | 5109 | |
25513619 | 5110 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 5111 | |
c3f6f71d | 5112 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5113 | { |
c3f6f71d | 5114 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5115 | { |
c906108c | 5116 | #ifdef FLTWATCH |
c3f6f71d JM |
5117 | if (proc_what (pi) == FLTWATCH) |
5118 | return 1; | |
c906108c SS |
5119 | #endif |
5120 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5121 | if (proc_what (pi) == FLTKWATCH) |
5122 | return 1; | |
c906108c | 5123 | #endif |
c3f6f71d | 5124 | } |
c906108c SS |
5125 | } |
5126 | return 0; | |
5127 | } | |
c906108c | 5128 | |
77382aee PA |
5129 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
5130 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
5131 | address. This function is only called if | |
5132 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
5133 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
5134 | |
5135 | static int | |
5136 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
5137 | { | |
5138 | procinfo *pi; | |
5139 | ||
5140 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5141 | return proc_watchpoint_address (pi, addr); | |
5142 | } | |
5143 | ||
25513619 | 5144 | static int |
0cf6dd15 TJB |
5145 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
5146 | struct expression *cond) | |
25513619 | 5147 | { |
d92524f1 | 5148 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5149 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5150 | { |
5151 | /* When a hardware watchpoint fires off the PC will be left at | |
5152 | the instruction following the one which caused the | |
5153 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5154 | the watchpoint. */ | |
5155 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5156 | } | |
5157 | else | |
5158 | { | |
5159 | /* When a hardware watchpoint fires off the PC will be left at | |
5160 | the instruction which caused the watchpoint. It will be | |
5161 | necessary for GDB to step over the watchpoint. */ | |
5162 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5163 | } | |
5164 | } | |
5165 | ||
5166 | static int | |
0cf6dd15 TJB |
5167 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
5168 | struct expression *cond) | |
25513619 PA |
5169 | { |
5170 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5171 | } | |
5172 | ||
5173 | static int | |
5174 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5175 | { | |
5176 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5177 | system can support "thousands" of hardware watchpoints, but gives | |
5178 | no method for finding out how many; It doesn't say anything about | |
5179 | the allowed size for the watched area either. So we just tell | |
5180 | GDB 'yes'. */ | |
5181 | return 1; | |
5182 | } | |
5183 | ||
5184 | void | |
5185 | procfs_use_watchpoints (struct target_ops *t) | |
5186 | { | |
5187 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5188 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5189 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5190 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5191 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 5192 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
5193 | } |
5194 | ||
77382aee PA |
5195 | /* Memory Mappings Functions: */ |
5196 | ||
5197 | /* Call a callback function once for each mapping, passing it the | |
5198 | mapping, an optional secondary callback function, and some optional | |
5199 | opaque data. Quit and return the first non-zero value returned | |
5200 | from the callback. | |
5201 | ||
5202 | PI is the procinfo struct for the process to be mapped. FUNC is | |
5203 | the callback function to be called by this iterator. DATA is the | |
5204 | optional opaque data to be passed to the callback function. | |
5205 | CHILD_FUNC is the optional secondary function pointer to be passed | |
5206 | to the child function. Returns the first non-zero return value | |
5207 | from the callback function, or zero. */ | |
831e682e MS |
5208 | |
5209 | static int | |
b8edc417 | 5210 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 5211 | void *data, |
19958708 | 5212 | int (*func) (struct prmap *map, |
b8edc417 | 5213 | find_memory_region_ftype child_func, |
831e682e MS |
5214 | void *data)) |
5215 | { | |
5216 | char pathname[MAX_PROC_NAME_SIZE]; | |
5217 | struct prmap *prmaps; | |
5218 | struct prmap *prmap; | |
5219 | int funcstat; | |
5220 | int map_fd; | |
5221 | int nmap; | |
0a86f364 | 5222 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
5223 | #ifdef NEW_PROC_API |
5224 | struct stat sbuf; | |
5225 | #endif | |
5226 | ||
19958708 | 5227 | /* Get the number of mappings, allocate space, |
831e682e MS |
5228 | and read the mappings into prmaps. */ |
5229 | #ifdef NEW_PROC_API | |
0df8b418 | 5230 | /* Open map fd. */ |
831e682e MS |
5231 | sprintf (pathname, "/proc/%d/map", pi->pid); |
5232 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5233 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5234 | ||
0df8b418 | 5235 | /* Make sure it gets closed again. */ |
831e682e MS |
5236 | make_cleanup_close (map_fd); |
5237 | ||
19958708 | 5238 | /* Use stat to determine the file size, and compute |
831e682e MS |
5239 | the number of prmap_t objects it contains. */ |
5240 | if (fstat (map_fd, &sbuf) != 0) | |
5241 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5242 | ||
5243 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5244 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5245 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5246 | != (nmap * sizeof (*prmaps))) | |
5247 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5248 | #else | |
5249 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5250 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5251 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5252 | ||
5253 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5254 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5255 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5256 | #endif | |
5257 | ||
5258 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5259 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5260 | { |
5261 | do_cleanups (cleanups); | |
5262 | return funcstat; | |
5263 | } | |
831e682e | 5264 | |
0a86f364 | 5265 | do_cleanups (cleanups); |
831e682e MS |
5266 | return 0; |
5267 | } | |
5268 | ||
77382aee | 5269 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5270 | function for each memory region. |
77382aee | 5271 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5272 | |
5273 | static int | |
19958708 | 5274 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5275 | find_memory_region_ftype func, void *data) |
be4d1333 | 5276 | { |
bf75638e | 5277 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5278 | map->pr_size, |
be4d1333 MS |
5279 | (map->pr_mflags & MA_READ) != 0, |
5280 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5281 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5282 | data); |
5283 | } | |
5284 | ||
77382aee PA |
5285 | /* External interface. Calls a callback function once for each |
5286 | mapped memory region in the child process, passing as arguments: | |
5287 | ||
5288 | CORE_ADDR virtual_address, | |
5289 | unsigned long size, | |
5290 | int read, TRUE if region is readable by the child | |
5291 | int write, TRUE if region is writable by the child | |
5292 | int execute TRUE if region is executable by the child. | |
5293 | ||
5294 | Stops iterating and returns the first non-zero value returned by | |
5295 | the callback. */ | |
be4d1333 MS |
5296 | |
5297 | static int | |
b8edc417 | 5298 | proc_find_memory_regions (find_memory_region_ftype func, void *data) |
be4d1333 MS |
5299 | { |
5300 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5301 | ||
19958708 | 5302 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5303 | find_memory_regions_callback); |
5304 | } | |
5305 | ||
77382aee | 5306 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5307 | |
388faa48 | 5308 | static char * |
5ae5f592 | 5309 | mappingflags (long flags) |
388faa48 MS |
5310 | { |
5311 | static char asciiflags[8]; | |
5312 | ||
5313 | strcpy (asciiflags, "-------"); | |
5314 | #if defined (MA_PHYS) | |
5315 | if (flags & MA_PHYS) | |
5316 | asciiflags[0] = 'd'; | |
5317 | #endif | |
5318 | if (flags & MA_STACK) | |
5319 | asciiflags[1] = 's'; | |
5320 | if (flags & MA_BREAK) | |
5321 | asciiflags[2] = 'b'; | |
5322 | if (flags & MA_SHARED) | |
5323 | asciiflags[3] = 's'; | |
5324 | if (flags & MA_READ) | |
5325 | asciiflags[4] = 'r'; | |
5326 | if (flags & MA_WRITE) | |
5327 | asciiflags[5] = 'w'; | |
5328 | if (flags & MA_EXEC) | |
5329 | asciiflags[6] = 'x'; | |
5330 | return (asciiflags); | |
5331 | } | |
5332 | ||
77382aee PA |
5333 | /* Callback function, does the actual work for 'info proc |
5334 | mappings'. */ | |
831e682e | 5335 | |
831e682e | 5336 | static int |
b8edc417 | 5337 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5338 | void *unused) |
831e682e | 5339 | { |
0b62613e | 5340 | unsigned int pr_off; |
831e682e | 5341 | |
831e682e | 5342 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5343 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5344 | #else |
0b62613e | 5345 | pr_off = map->pr_off; |
831e682e | 5346 | #endif |
0b62613e | 5347 | |
a97b0ac8 | 5348 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5349 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5350 | (unsigned long) map->pr_vaddr, |
5351 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5352 | (unsigned long) map->pr_size, |
0b62613e PA |
5353 | pr_off, |
5354 | mappingflags (map->pr_mflags)); | |
5355 | else | |
f6a96b83 | 5356 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5357 | (unsigned long) map->pr_vaddr, |
5358 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5359 | (unsigned long) map->pr_size, |
0b62613e PA |
5360 | pr_off, |
5361 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5362 | |
5363 | return 0; | |
5364 | } | |
5365 | ||
77382aee | 5366 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5367 | |
5368 | static void | |
5369 | info_proc_mappings (procinfo *pi, int summary) | |
5370 | { | |
388faa48 | 5371 | if (summary) |
0df8b418 | 5372 | return; /* No output for summary mode. */ |
388faa48 | 5373 | |
a3f17187 | 5374 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5375 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5376 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5377 | "Start Addr", | |
5378 | " End Addr", | |
5379 | " Size", | |
5380 | " Offset", | |
5381 | "Flags"); | |
5382 | else | |
5383 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5384 | "Start Addr", | |
5385 | " End Addr", | |
5386 | " Size", | |
5387 | " Offset", | |
5388 | "Flags"); | |
388faa48 | 5389 | |
831e682e | 5390 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5391 | printf_filtered ("\n"); |
5392 | } | |
5393 | ||
77382aee | 5394 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5395 | |
5396 | static void | |
145b16a9 UW |
5397 | procfs_info_proc (struct target_ops *ops, char *args, |
5398 | enum info_proc_what what) | |
c906108c | 5399 | { |
c3f6f71d | 5400 | struct cleanup *old_chain; |
388faa48 MS |
5401 | procinfo *process = NULL; |
5402 | procinfo *thread = NULL; | |
5403 | char **argv = NULL; | |
5404 | char *tmp = NULL; | |
5405 | int pid = 0; | |
5406 | int tid = 0; | |
5407 | int mappings = 0; | |
c906108c | 5408 | |
145b16a9 UW |
5409 | switch (what) |
5410 | { | |
5411 | case IP_MINIMAL: | |
5412 | break; | |
5413 | ||
5414 | case IP_MAPPINGS: | |
5415 | case IP_ALL: | |
5416 | mappings = 1; | |
5417 | break; | |
5418 | ||
5419 | default: | |
5420 | error (_("Not supported on this target.")); | |
5421 | } | |
5422 | ||
c3f6f71d JM |
5423 | old_chain = make_cleanup (null_cleanup, 0); |
5424 | if (args) | |
0fda6bd2 | 5425 | { |
d1a41061 PP |
5426 | argv = gdb_buildargv (args); |
5427 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5428 | } |
c3f6f71d JM |
5429 | while (argv != NULL && *argv != NULL) |
5430 | { | |
5431 | if (isdigit (argv[0][0])) | |
5432 | { | |
5433 | pid = strtoul (argv[0], &tmp, 10); | |
5434 | if (*tmp == '/') | |
5435 | tid = strtoul (++tmp, NULL, 10); | |
5436 | } | |
5437 | else if (argv[0][0] == '/') | |
5438 | { | |
5439 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5440 | } | |
c3f6f71d JM |
5441 | argv++; |
5442 | } | |
5443 | if (pid == 0) | |
39f77062 | 5444 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5445 | if (pid == 0) |
8a3fe4f8 | 5446 | error (_("No current process: you must name one.")); |
c3f6f71d | 5447 | else |
c906108c | 5448 | { |
c3f6f71d | 5449 | /* Have pid, will travel. |
0df8b418 | 5450 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5451 | process = find_procinfo (pid, 0); |
5452 | if (process == NULL) | |
5453 | { | |
19958708 | 5454 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5455 | remember to close it again when finished. */ |
5456 | process = create_procinfo (pid, 0); | |
004527cb | 5457 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5458 | if (!open_procinfo_files (process, FD_CTL)) |
5459 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5460 | } | |
c906108c | 5461 | } |
c3f6f71d JM |
5462 | if (tid != 0) |
5463 | thread = create_procinfo (pid, tid); | |
5464 | ||
5465 | if (process) | |
5466 | { | |
a3f17187 | 5467 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5468 | proc_prettyprint_flags (proc_flags (process), 1); |
5469 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5470 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5471 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5472 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5473 | proc_get_nthreads (process)); |
5474 | } | |
5475 | if (thread) | |
5476 | { | |
a3f17187 | 5477 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5478 | proc_prettyprint_flags (proc_flags (thread), 1); |
5479 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5480 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5481 | } | |
5482 | ||
388faa48 MS |
5483 | if (mappings) |
5484 | { | |
5485 | info_proc_mappings (process, 0); | |
5486 | } | |
5487 | ||
c3f6f71d | 5488 | do_cleanups (old_chain); |
c906108c SS |
5489 | } |
5490 | ||
9185ddce JB |
5491 | /* Modify the status of the system call identified by SYSCALLNUM in |
5492 | the set of syscalls that are currently traced/debugged. | |
5493 | ||
5494 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5495 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5496 | |
0df8b418 | 5497 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5498 | will be disabled. */ |
5499 | ||
5500 | static void | |
5501 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5502 | int mode, int from_tty) |
9185ddce JB |
5503 | { |
5504 | sysset_t *sysset; | |
77382aee | 5505 | |
9185ddce JB |
5506 | if (entry_or_exit == PR_SYSENTRY) |
5507 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5508 | else | |
5509 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5510 | ||
5511 | if (sysset == NULL) | |
5512 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5513 | ||
5514 | if (mode == FLAG_SET) | |
5515 | gdb_praddsysset (sysset, syscallnum); | |
5516 | else | |
5517 | gdb_prdelsysset (sysset, syscallnum); | |
5518 | ||
5519 | if (entry_or_exit == PR_SYSENTRY) | |
5520 | { | |
5521 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5522 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5523 | } |
5524 | else | |
5525 | { | |
5526 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5527 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5528 | } |
5529 | } | |
5530 | ||
c3f6f71d | 5531 | static void |
fba45db2 | 5532 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5533 | { |
c3f6f71d | 5534 | procinfo *pi; |
c906108c | 5535 | |
39f77062 | 5536 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5537 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5538 | |
c3f6f71d | 5539 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5540 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5541 | |
39f77062 | 5542 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5543 | if (isdigit (args[0])) |
5544 | { | |
9185ddce | 5545 | const int syscallnum = atoi (args); |
c906108c | 5546 | |
9185ddce | 5547 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5548 | } |
5549 | } | |
5550 | ||
19958708 | 5551 | static void |
fba45db2 | 5552 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5553 | { |
c3f6f71d JM |
5554 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5555 | } | |
c906108c | 5556 | |
19958708 | 5557 | static void |
fba45db2 | 5558 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5559 | { |
5560 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5561 | } |
c906108c | 5562 | |
19958708 | 5563 | static void |
fba45db2 | 5564 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5565 | { |
5566 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5567 | } | |
5568 | ||
19958708 | 5569 | static void |
fba45db2 | 5570 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5571 | { |
c3f6f71d JM |
5572 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5573 | } | |
c906108c | 5574 | |
c906108c | 5575 | |
c906108c | 5576 | void |
fba45db2 | 5577 | _initialize_procfs (void) |
c906108c | 5578 | { |
27087a3d JB |
5579 | observer_attach_inferior_created (procfs_inferior_created); |
5580 | ||
19958708 | 5581 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5582 | _("Give a trace of entries into the syscall.")); |
19958708 | 5583 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5584 | _("Give a trace of exits from the syscall.")); |
19958708 | 5585 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5586 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5587 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5588 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5589 | } |
5590 | ||
5591 | /* =================== END, GDB "MODULE" =================== */ | |
5592 | ||
5593 | ||
5594 | ||
77382aee PA |
5595 | /* miscellaneous stubs: */ |
5596 | ||
5597 | /* The following satisfy a few random symbols mostly created by the | |
5598 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5599 | |
77382aee PA |
5600 | /* Return a pid for which we guarantee we will be able to find a |
5601 | 'live' procinfo. */ | |
c3f6f71d | 5602 | |
39f77062 | 5603 | ptid_t |
fba45db2 | 5604 | procfs_first_available (void) |
c3f6f71d | 5605 | { |
39f77062 | 5606 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5607 | } |
be4d1333 MS |
5608 | |
5609 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5610 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5611 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5612 | |
5613 | static char * | |
19958708 | 5614 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
5615 | char *note_data, int *note_size, |
5616 | enum target_signal stop_signal) | |
be4d1333 | 5617 | { |
594f7785 | 5618 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5619 | gdb_gregset_t gregs; |
5620 | gdb_fpregset_t fpregs; | |
5621 | unsigned long merged_pid; | |
75125405 | 5622 | struct cleanup *old_chain; |
be4d1333 MS |
5623 | |
5624 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5625 | ||
75125405 DJ |
5626 | /* This part is the old method for fetching registers. |
5627 | It should be replaced by the newer one using regsets | |
5628 | once it is implemented in this platform: | |
0df8b418 | 5629 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5630 | |
5631 | old_chain = save_inferior_ptid (); | |
5632 | inferior_ptid = ptid; | |
5633 | target_fetch_registers (regcache, -1); | |
5634 | ||
594f7785 | 5635 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5636 | #if defined (NEW_PROC_API) |
65554fef MS |
5637 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5638 | note_data, | |
5639 | note_size, | |
19958708 | 5640 | merged_pid, |
65554fef MS |
5641 | stop_signal, |
5642 | &gregs); | |
5643 | #else | |
be4d1333 | 5644 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5645 | note_data, |
5646 | note_size, | |
19958708 | 5647 | merged_pid, |
be4d1333 | 5648 | stop_signal, |
65554fef MS |
5649 | &gregs); |
5650 | #endif | |
594f7785 | 5651 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5652 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5653 | note_data, | |
5654 | note_size, | |
5655 | &fpregs, | |
5656 | sizeof (fpregs)); | |
75125405 DJ |
5657 | |
5658 | do_cleanups (old_chain); | |
5659 | ||
be4d1333 MS |
5660 | return note_data; |
5661 | } | |
5662 | ||
5663 | struct procfs_corefile_thread_data { | |
5664 | bfd *obfd; | |
5665 | char *note_data; | |
5666 | int *note_size; | |
2020b7ab | 5667 | enum target_signal stop_signal; |
be4d1333 MS |
5668 | }; |
5669 | ||
5670 | static int | |
65554fef | 5671 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5672 | { |
5673 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5674 | |
2689673f | 5675 | if (pi != NULL) |
be4d1333 | 5676 | { |
75125405 | 5677 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
f4a14ae6 | 5678 | |
75125405 | 5679 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5680 | args->note_data, |
2020b7ab PA |
5681 | args->note_size, |
5682 | args->stop_signal); | |
be4d1333 MS |
5683 | } |
5684 | return 0; | |
5685 | } | |
5686 | ||
a223f1e7 JB |
5687 | static int |
5688 | find_signalled_thread (struct thread_info *info, void *data) | |
5689 | { | |
16c381f0 | 5690 | if (info->suspend.stop_signal != TARGET_SIGNAL_0 |
a223f1e7 JB |
5691 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5692 | return 1; | |
5693 | ||
5694 | return 0; | |
5695 | } | |
5696 | ||
5697 | static enum target_signal | |
5698 | find_stop_signal (void) | |
5699 | { | |
5700 | struct thread_info *info = | |
5701 | iterate_over_threads (find_signalled_thread, NULL); | |
5702 | ||
5703 | if (info) | |
16c381f0 | 5704 | return info->suspend.stop_signal; |
a223f1e7 JB |
5705 | else |
5706 | return TARGET_SIGNAL_0; | |
5707 | } | |
5708 | ||
be4d1333 MS |
5709 | static char * |
5710 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5711 | { | |
5712 | struct cleanup *old_chain; | |
5713 | gdb_gregset_t gregs; | |
5714 | gdb_fpregset_t fpregs; | |
5715 | char fname[16] = {'\0'}; | |
5716 | char psargs[80] = {'\0'}; | |
5717 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5718 | char *note_data = NULL; | |
6dbdc4a3 | 5719 | char *inf_args; |
be4d1333 | 5720 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5721 | gdb_byte *auxv; |
4e73f23d | 5722 | int auxv_len; |
651c8d2d | 5723 | enum target_signal stop_signal; |
be4d1333 MS |
5724 | |
5725 | if (get_exec_file (0)) | |
5726 | { | |
9f37bbcc | 5727 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
19958708 | 5728 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 5729 | sizeof (psargs)); |
6dbdc4a3 MS |
5730 | |
5731 | inf_args = get_inferior_args (); | |
5732 | if (inf_args && *inf_args && | |
5733 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5734 | { |
19958708 | 5735 | strncat (psargs, " ", |
be4d1333 | 5736 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5737 | strncat (psargs, inf_args, |
be4d1333 MS |
5738 | sizeof (psargs) - strlen (psargs)); |
5739 | } | |
5740 | } | |
5741 | ||
19958708 RM |
5742 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5743 | note_data, | |
5744 | note_size, | |
5745 | fname, | |
be4d1333 MS |
5746 | psargs); |
5747 | ||
651c8d2d PA |
5748 | stop_signal = find_stop_signal (); |
5749 | ||
8903eff6 | 5750 | #ifdef UNIXWARE |
594f7785 | 5751 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5752 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5753 | PIDGET (inferior_ptid), | |
65554fef MS |
5754 | stop_signal, &gregs); |
5755 | #endif | |
5756 | ||
be4d1333 MS |
5757 | thread_args.obfd = obfd; |
5758 | thread_args.note_data = note_data; | |
5759 | thread_args.note_size = note_size; | |
651c8d2d | 5760 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5761 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5762 | &thread_args); | |
65554fef | 5763 | |
2689673f PA |
5764 | /* There should be always at least one thread. */ |
5765 | gdb_assert (thread_args.note_data != note_data); | |
5766 | note_data = thread_args.note_data; | |
be4d1333 | 5767 | |
13547ab6 DJ |
5768 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5769 | NULL, &auxv); | |
4e73f23d RM |
5770 | if (auxv_len > 0) |
5771 | { | |
5772 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5773 | "CORE", NT_AUXV, auxv, auxv_len); | |
5774 | xfree (auxv); | |
5775 | } | |
5776 | ||
be4d1333 MS |
5777 | make_cleanup (xfree, note_data); |
5778 | return note_data; | |
5779 | } | |
65554fef MS |
5780 | #else /* !(Solaris or Unixware) */ |
5781 | static char * | |
5782 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5783 | { | |
8a3fe4f8 | 5784 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5785 | return NULL; /* lint */ |
5786 | } | |
5787 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5788 | /* =================== END GCORE .NOTE "MODULE" =================== */ |