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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 | |
a5362b9a | 269 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
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); | |
a0911fd0 MR |
1026 | int proc_nsysarg (procinfo * pi); |
1027 | long *proc_sysargs (procinfo * pi); | |
1028 | int proc_syscall (procinfo * pi); | |
1029 | long proc_cursig (struct procinfo * pi); | |
a14ed312 KB |
1030 | int proc_set_run_on_last_close (procinfo * pi); |
1031 | int proc_unset_run_on_last_close (procinfo * pi); | |
a0911fd0 MR |
1032 | int proc_set_kill_on_last_close (procinfo * pi); |
1033 | int proc_unset_kill_on_last_close (procinfo * pi); | |
a14ed312 KB |
1034 | int proc_set_inherit_on_fork (procinfo * pi); |
1035 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1036 | int proc_set_async (procinfo * pi); | |
1037 | int proc_unset_async (procinfo * pi); | |
1038 | int proc_stop_process (procinfo * pi); | |
1039 | int proc_trace_signal (procinfo * pi, int signo); | |
1040 | int proc_ignore_signal (procinfo * pi, int signo); | |
1041 | int proc_clear_current_fault (procinfo * pi); | |
1042 | int proc_set_current_signal (procinfo * pi, int signo); | |
1043 | int proc_clear_current_signal (procinfo * pi); | |
1044 | int proc_set_gregs (procinfo * pi); | |
1045 | int proc_set_fpregs (procinfo * pi); | |
1046 | int proc_wait_for_stop (procinfo * pi); | |
1047 | int proc_run_process (procinfo * pi, int step, int signo); | |
1048 | int proc_kill (procinfo * pi, int signo); | |
1049 | int proc_parent_pid (procinfo * pi); | |
1050 | int proc_get_nthreads (procinfo * pi); | |
1051 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1052 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1053 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1054 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1055 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1056 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1057 | |
1058 | int proc_update_threads (procinfo * pi); | |
1059 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1060 | int (*func) (procinfo *, procinfo *, void *), |
1061 | void *ptr); | |
a14ed312 KB |
1062 | |
1063 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1064 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1065 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1066 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1067 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1068 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1069 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1070 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
3e43a32a MS |
1071 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, |
1072 | gdb_sigaction_t *save); | |
a14ed312 KB |
1073 | |
1074 | void proc_warn (procinfo * pi, char *func, int line); | |
1075 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1076 | |
c3f6f71d | 1077 | void |
fba45db2 | 1078 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1079 | { |
1080 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1081 | print_sys_errmsg (errmsg, errno); | |
1082 | } | |
c906108c | 1083 | |
c3f6f71d | 1084 | void |
fba45db2 | 1085 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1086 | { |
1087 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1088 | perror_with_name (errmsg); | |
1089 | } | |
c906108c | 1090 | |
77382aee PA |
1091 | /* Updates the status struct in the procinfo. There is a 'valid' |
1092 | flag, to let other functions know when this function needs to be | |
1093 | called (so the status is only read when it is needed). The status | |
1094 | file descriptor is also only opened when it is needed. Returns | |
1095 | non-zero for success, zero for failure. */ | |
c906108c | 1096 | |
c3f6f71d | 1097 | int |
fba45db2 | 1098 | proc_get_status (procinfo *pi) |
c3f6f71d | 1099 | { |
0df8b418 | 1100 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1101 | if (pi->status_fd == 0 && |
1102 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1103 | { | |
1104 | pi->status_valid = 0; | |
1105 | return 0; | |
1106 | } | |
c906108c | 1107 | |
c3f6f71d JM |
1108 | #ifdef NEW_PROC_API |
1109 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1110 | pi->status_valid = 0; /* fail */ | |
1111 | else | |
1112 | { | |
19958708 | 1113 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1114 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1115 | if (pi->tid) |
19958708 RM |
1116 | pi->status_valid = (read (pi->status_fd, |
1117 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1118 | sizeof (lwpstatus_t)) |
1119 | == sizeof (lwpstatus_t)); | |
1120 | else | |
1121 | { | |
19958708 | 1122 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1123 | (char *) &pi->prstatus, |
1124 | sizeof (gdb_prstatus_t)) | |
1125 | == sizeof (gdb_prstatus_t)); | |
1126 | #if 0 /*def UNIXWARE*/ | |
1127 | if (pi->status_valid && | |
1128 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1129 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
0df8b418 | 1130 | /* Unixware peculiarity -- read the damn thing again! */ |
19958708 | 1131 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1132 | (char *) &pi->prstatus, |
1133 | sizeof (gdb_prstatus_t)) | |
1134 | == sizeof (gdb_prstatus_t)); | |
1135 | #endif /* UNIXWARE */ | |
1136 | } | |
1137 | } | |
1138 | #else /* ioctl method */ | |
1139 | #ifdef PIOCTSTATUS /* osf */ | |
1140 | if (pi->tid == 0) /* main process */ | |
1141 | { | |
0df8b418 | 1142 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1143 | pi->status_valid = |
c3f6f71d JM |
1144 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1145 | } | |
1146 | else | |
1147 | { | |
1148 | int win; | |
1149 | struct { | |
1150 | long pr_count; | |
1151 | tid_t pr_error_thread; | |
1152 | struct prstatus status; | |
1153 | } thread_status; | |
1154 | ||
1155 | thread_status.pr_count = 1; | |
1156 | thread_status.status.pr_tid = pi->tid; | |
1157 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1158 | if (win) | |
1159 | { | |
19958708 | 1160 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1161 | sizeof (pi->prstatus)); |
1162 | pi->status_valid = 1; | |
1163 | } | |
1164 | } | |
1165 | #else | |
77382aee | 1166 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1167 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1168 | #endif | |
1169 | #endif | |
c906108c | 1170 | |
c3f6f71d JM |
1171 | if (pi->status_valid) |
1172 | { | |
19958708 | 1173 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1174 | proc_why (pi), |
19958708 | 1175 | proc_what (pi), |
c3f6f71d JM |
1176 | proc_get_current_thread (pi)); |
1177 | } | |
c906108c | 1178 | |
77382aee | 1179 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1180 | pi->gregs_valid = pi->status_valid; |
1181 | #ifdef NEW_PROC_API | |
77382aee PA |
1182 | /* In the read/write multiple-fd model, the status struct includes |
1183 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1184 | pi->fpregs_valid = pi->status_valid; |
1185 | #endif | |
77382aee | 1186 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1187 | } |
c906108c | 1188 | |
77382aee | 1189 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d JM |
1190 | |
1191 | long | |
fba45db2 | 1192 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1193 | { |
1194 | if (!pi->status_valid) | |
1195 | if (!proc_get_status (pi)) | |
0df8b418 | 1196 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1197 | |
c3f6f71d | 1198 | #ifdef NEW_PROC_API |
0d06e24b JM |
1199 | # ifdef UNIXWARE |
1200 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1201 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1202 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1203 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1204 | # else | |
c3f6f71d | 1205 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1206 | # endif |
c3f6f71d JM |
1207 | #else |
1208 | return pi->prstatus.pr_flags; | |
1209 | #endif | |
1210 | } | |
c906108c | 1211 | |
77382aee | 1212 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1213 | |
c3f6f71d | 1214 | int |
fba45db2 | 1215 | proc_why (procinfo *pi) |
c3f6f71d JM |
1216 | { |
1217 | if (!pi->status_valid) | |
1218 | if (!proc_get_status (pi)) | |
0df8b418 | 1219 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1220 | |
c3f6f71d JM |
1221 | #ifdef NEW_PROC_API |
1222 | return pi->prstatus.pr_lwp.pr_why; | |
1223 | #else | |
1224 | return pi->prstatus.pr_why; | |
1225 | #endif | |
1226 | } | |
c906108c | 1227 | |
77382aee | 1228 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1229 | |
c3f6f71d | 1230 | int |
fba45db2 | 1231 | proc_what (procinfo *pi) |
c3f6f71d JM |
1232 | { |
1233 | if (!pi->status_valid) | |
1234 | if (!proc_get_status (pi)) | |
0df8b418 | 1235 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1236 | |
c3f6f71d JM |
1237 | #ifdef NEW_PROC_API |
1238 | return pi->prstatus.pr_lwp.pr_what; | |
1239 | #else | |
1240 | return pi->prstatus.pr_what; | |
c906108c | 1241 | #endif |
c3f6f71d | 1242 | } |
c906108c | 1243 | |
77382aee PA |
1244 | /* This function is only called when PI is stopped by a watchpoint. |
1245 | Assuming the OS supports it, write to *ADDR the data address which | |
1246 | triggered it and return 1. Return 0 if it is not possible to know | |
1247 | the address. */ | |
bf701c2c PM |
1248 | |
1249 | static int | |
1250 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1251 | { | |
1252 | if (!pi->status_valid) | |
1253 | if (!proc_get_status (pi)) | |
1254 | return 0; | |
1255 | ||
1256 | #ifdef NEW_PROC_API | |
1257 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1258 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1259 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1260 | #else | |
1261 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1262 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1263 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1264 | #endif | |
1265 | return 1; | |
1266 | } | |
1267 | ||
c3f6f71d | 1268 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1269 | |
1270 | /* Returns the pr_nsysarg field (number of args to the current | |
1271 | syscall). */ | |
c3f6f71d JM |
1272 | |
1273 | int | |
fba45db2 | 1274 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1275 | { |
1276 | if (!pi->status_valid) | |
1277 | if (!proc_get_status (pi)) | |
1278 | return 0; | |
19958708 | 1279 | |
c3f6f71d JM |
1280 | #ifdef NEW_PROC_API |
1281 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1282 | #else | |
1283 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1284 | #endif |
c3f6f71d | 1285 | } |
c906108c | 1286 | |
77382aee PA |
1287 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1288 | syscall). */ | |
c906108c | 1289 | |
c3f6f71d | 1290 | long * |
fba45db2 | 1291 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1292 | { |
1293 | if (!pi->status_valid) | |
1294 | if (!proc_get_status (pi)) | |
1295 | return NULL; | |
19958708 | 1296 | |
c3f6f71d JM |
1297 | #ifdef NEW_PROC_API |
1298 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1299 | #else | |
1300 | return (long *) &pi->prstatus.pr_sysarg; | |
1301 | #endif | |
1302 | } | |
c906108c | 1303 | |
77382aee PA |
1304 | /* Returns the pr_syscall field (id of current syscall if we are in |
1305 | one). */ | |
c906108c | 1306 | |
c3f6f71d | 1307 | int |
fba45db2 | 1308 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1309 | { |
1310 | if (!pi->status_valid) | |
1311 | if (!proc_get_status (pi)) | |
1312 | return 0; | |
19958708 | 1313 | |
c3f6f71d JM |
1314 | #ifdef NEW_PROC_API |
1315 | return pi->prstatus.pr_lwp.pr_syscall; | |
1316 | #else | |
1317 | return pi->prstatus.pr_syscall; | |
1318 | #endif | |
1319 | } | |
1320 | #endif /* PIOCSSPCACT */ | |
c906108c | 1321 | |
77382aee | 1322 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1323 | |
c3f6f71d JM |
1324 | long |
1325 | proc_cursig (struct procinfo *pi) | |
1326 | { | |
1327 | if (!pi->status_valid) | |
1328 | if (!proc_get_status (pi)) | |
0df8b418 | 1329 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1330 | |
c3f6f71d JM |
1331 | #ifdef NEW_PROC_API |
1332 | return pi->prstatus.pr_lwp.pr_cursig; | |
1333 | #else | |
1334 | return pi->prstatus.pr_cursig; | |
1335 | #endif | |
1336 | } | |
c906108c | 1337 | |
77382aee PA |
1338 | /* === I appologize for the messiness of this function. |
1339 | === This is an area where the different versions of | |
1340 | === /proc are more inconsistent than usual. | |
1341 | ||
1342 | Set or reset any of the following process flags: | |
1343 | PR_FORK -- forked child will inherit trace flags | |
1344 | PR_RLC -- traced process runs when last /proc file closed. | |
1345 | PR_KLC -- traced process is killed when last /proc file closed. | |
1346 | PR_ASYNC -- LWP's get to run/stop independently. | |
1347 | ||
1348 | There are three methods for doing this function: | |
1349 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1350 | [Sol6, Sol7, UW] | |
1351 | 2) Middle: PIOCSET/PIOCRESET | |
1352 | [Irix, Sol5] | |
1353 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1354 | [OSF, Sol5] | |
1355 | ||
1356 | Note: Irix does not define PR_ASYNC. | |
1357 | Note: OSF does not define PR_KLC. | |
1358 | Note: OSF is the only one that can ONLY use the oldest method. | |
1359 | ||
1360 | Arguments: | |
1361 | pi -- the procinfo | |
1362 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1363 | mode -- 1 for set, 0 for reset. | |
1364 | ||
1365 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1366 | |
c3f6f71d | 1367 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1368 | |
c3f6f71d | 1369 | static int |
fba45db2 | 1370 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1371 | { |
1372 | long win = 0; /* default to fail */ | |
1373 | ||
77382aee PA |
1374 | /* These operations affect the process as a whole, and applying them |
1375 | to an individual LWP has the same meaning as applying them to the | |
1376 | main process. Therefore, if we're ever called with a pointer to | |
1377 | an LWP's procinfo, let's substitute the process's procinfo and | |
1378 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1379 | |
1380 | if (pi->pid != 0) | |
1381 | pi = find_procinfo_or_die (pi->pid, 0); | |
1382 | ||
0df8b418 | 1383 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii. */ |
19958708 | 1384 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1385 | (which for no obvious reason has a different definition |
1386 | from one operating system to the next...) */ | |
1387 | #ifdef PCUNSET | |
1388 | #define GDBRESET PCUNSET | |
37de36c6 | 1389 | #else |
c3f6f71d JM |
1390 | #ifdef PCRESET |
1391 | #define GDBRESET PCRESET | |
37de36c6 | 1392 | #endif |
c906108c | 1393 | #endif |
c3f6f71d | 1394 | { |
37de36c6 | 1395 | procfs_ctl_t arg[2]; |
c906108c | 1396 | |
0df8b418 | 1397 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1398 | arg[0] = PCSET; |
0df8b418 | 1399 | else /* Reset the flag. */ |
c3f6f71d | 1400 | arg[0] = GDBRESET; |
c5aa993b | 1401 | |
c3f6f71d JM |
1402 | arg[1] = flag; |
1403 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1404 | } | |
1405 | #else | |
1406 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1407 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1408 | { |
1409 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1410 | } | |
0df8b418 | 1411 | else /* Reset the flag. */ |
c3f6f71d JM |
1412 | { |
1413 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1414 | } | |
c906108c | 1415 | |
c3f6f71d JM |
1416 | #else |
1417 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1418 | switch (flag) { | |
1419 | case PR_RLC: | |
1420 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1421 | { | |
1422 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1423 | } | |
1424 | else /* Clear run-on-last-close */ | |
1425 | { | |
1426 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1427 | } | |
1428 | break; | |
1429 | case PR_FORK: | |
1430 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1431 | { | |
1432 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1433 | } | |
1434 | else /* Clear inherit-on-fork */ | |
1435 | { | |
1436 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1437 | } | |
1438 | break; | |
1439 | default: | |
0df8b418 | 1440 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1441 | break; |
1442 | } | |
1443 | #endif | |
1444 | #endif | |
1445 | #endif | |
1446 | #undef GDBRESET | |
77382aee PA |
1447 | /* The above operation renders the procinfo's cached pstatus |
1448 | obsolete. */ | |
c3f6f71d | 1449 | pi->status_valid = 0; |
c906108c | 1450 | |
c3f6f71d | 1451 | if (!win) |
8a3fe4f8 | 1452 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1453 | flag == PR_FORK ? "PR_FORK" : |
1454 | flag == PR_RLC ? "PR_RLC" : | |
1455 | #ifdef PR_ASYNC | |
1456 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1457 | #endif |
1458 | #ifdef PR_KLC | |
1459 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1460 | #endif |
1461 | "<unknown flag>", | |
1462 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1463 | |
c3f6f71d JM |
1464 | return win; |
1465 | } | |
c906108c | 1466 | |
77382aee PA |
1467 | /* Set the run_on_last_close flag. Process with all threads will |
1468 | become runnable when debugger closes all /proc fds. Returns | |
1469 | non-zero for success, zero for failure. */ | |
c906108c | 1470 | |
c3f6f71d | 1471 | int |
fba45db2 | 1472 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1473 | { |
c3f6f71d JM |
1474 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1475 | } | |
c906108c | 1476 | |
77382aee PA |
1477 | /* Reset the run_on_last_close flag. The process will NOT become |
1478 | runnable when debugger closes its file handles. Returns non-zero | |
1479 | for success, zero for failure. */ | |
c906108c | 1480 | |
c3f6f71d | 1481 | int |
fba45db2 | 1482 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1483 | { |
1484 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1485 | } |
1486 | ||
0d06e24b | 1487 | #ifdef PR_KLC |
77382aee PA |
1488 | /* Set the kill_on_last_close flag. Process with all threads will be |
1489 | killed when debugger closes all /proc fds (or debugger exits or | |
1490 | dies). Returns non-zero for success, zero for failure. */ | |
0d06e24b JM |
1491 | |
1492 | int | |
fba45db2 | 1493 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1494 | { |
1495 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1496 | } | |
1497 | ||
77382aee PA |
1498 | /* Reset the kill_on_last_close flag. Process will NOT be killed when |
1499 | debugger closes its file handles (or exits or dies). Returns | |
1500 | non-zero for success, zero for failure. */ | |
0d06e24b JM |
1501 | |
1502 | int | |
fba45db2 | 1503 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1504 | { |
1505 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1506 | } | |
1507 | #endif /* PR_KLC */ | |
1508 | ||
77382aee PA |
1509 | /* Set inherit_on_fork flag. If the process forks a child while we |
1510 | are registered for events in the parent, then we will also recieve | |
1511 | events from the child. Returns non-zero for success, zero for | |
1512 | failure. */ | |
c906108c | 1513 | |
c3f6f71d | 1514 | int |
fba45db2 | 1515 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1516 | { |
1517 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1518 | } | |
c5aa993b | 1519 | |
77382aee PA |
1520 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1521 | are registered for events in the parent, then we will NOT recieve | |
1522 | events from the child. Returns non-zero for success, zero for | |
1523 | failure. */ | |
c906108c | 1524 | |
c3f6f71d | 1525 | int |
fba45db2 | 1526 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1527 | { |
1528 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1529 | } | |
c906108c | 1530 | |
c3f6f71d | 1531 | #ifdef PR_ASYNC |
77382aee PA |
1532 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1533 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1534 | non-zero for success, zero for failure. */ | |
c906108c | 1535 | |
c3f6f71d | 1536 | int |
fba45db2 | 1537 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1538 | { |
1539 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1540 | } | |
c906108c | 1541 | |
77382aee PA |
1542 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1543 | (signal etc.), then all other LWPs will stop as well. Returns | |
1544 | non-zero for success, zero for failure. */ | |
c906108c | 1545 | |
c3f6f71d | 1546 | int |
fba45db2 | 1547 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1548 | { |
1549 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1550 | } | |
1551 | #endif /* PR_ASYNC */ | |
c906108c | 1552 | |
77382aee PA |
1553 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1554 | for success, zero for failure. */ | |
c906108c | 1555 | |
c3f6f71d | 1556 | int |
fba45db2 | 1557 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1558 | { |
1559 | int win; | |
c906108c | 1560 | |
77382aee PA |
1561 | /* We might conceivably apply this operation to an LWP, and the |
1562 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1563 | |
c3f6f71d JM |
1564 | if (pi->ctl_fd == 0 && |
1565 | open_procinfo_files (pi, FD_CTL) == 0) | |
1566 | return 0; | |
1567 | else | |
1568 | { | |
1569 | #ifdef NEW_PROC_API | |
37de36c6 | 1570 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1571 | |
c3f6f71d JM |
1572 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1573 | #else /* ioctl method */ | |
1574 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1575 | /* Note: the call also reads the prstatus. */ | |
1576 | if (win) | |
1577 | { | |
1578 | pi->status_valid = 1; | |
19958708 | 1579 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1580 | proc_why (pi), |
19958708 | 1581 | proc_what (pi), |
c3f6f71d JM |
1582 | proc_get_current_thread (pi)); |
1583 | } | |
1584 | #endif | |
1585 | } | |
c906108c | 1586 | |
c3f6f71d JM |
1587 | return win; |
1588 | } | |
c5aa993b | 1589 | |
77382aee PA |
1590 | /* Wait for the process or LWP to stop (block until it does). Returns |
1591 | non-zero for success, zero for failure. */ | |
c906108c | 1592 | |
c3f6f71d | 1593 | int |
fba45db2 | 1594 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1595 | { |
c3f6f71d JM |
1596 | int win; |
1597 | ||
77382aee PA |
1598 | /* We should never have to apply this operation to any procinfo |
1599 | except the one for the main process. If that ever changes for | |
1600 | any reason, then take out the following clause and replace it | |
1601 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1602 | |
c3f6f71d JM |
1603 | if (pi->tid != 0) |
1604 | pi = find_procinfo_or_die (pi->pid, 0); | |
1605 | ||
1606 | #ifdef NEW_PROC_API | |
1607 | { | |
37de36c6 | 1608 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1609 | |
c3f6f71d JM |
1610 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1611 | /* We been runnin' and we stopped -- need to update status. */ | |
1612 | pi->status_valid = 0; | |
1613 | } | |
1614 | #else /* ioctl method */ | |
1615 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1616 | /* Above call also refreshes the prstatus. */ | |
1617 | if (win) | |
1618 | { | |
1619 | pi->status_valid = 1; | |
19958708 | 1620 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1621 | proc_why (pi), |
19958708 | 1622 | proc_what (pi), |
c3f6f71d JM |
1623 | proc_get_current_thread (pi)); |
1624 | } | |
c906108c SS |
1625 | #endif |
1626 | ||
c3f6f71d | 1627 | return win; |
c906108c SS |
1628 | } |
1629 | ||
77382aee PA |
1630 | /* Make the process or LWP runnable. |
1631 | ||
1632 | Options (not all are implemented): | |
1633 | - single-step | |
1634 | - clear current fault | |
1635 | - clear current signal | |
1636 | - abort the current system call | |
1637 | - stop as soon as finished with system call | |
1638 | - (ioctl): set traced signal set | |
1639 | - (ioctl): set held signal set | |
1640 | - (ioctl): set traced fault set | |
1641 | - (ioctl): set start pc (vaddr) | |
1642 | ||
1643 | Always clears the current fault. PI is the process or LWP to | |
1644 | operate on. If STEP is true, set the process or LWP to trap after | |
1645 | one instruction. If SIGNO is zero, clear the current signal if | |
1646 | any; if non-zero, set the current signal to this one. Returns | |
1647 | non-zero for success, zero for failure. */ | |
c3f6f71d JM |
1648 | |
1649 | int | |
fba45db2 | 1650 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1651 | { |
1652 | int win; | |
1653 | int runflags; | |
1654 | ||
77382aee PA |
1655 | /* We will probably have to apply this operation to individual |
1656 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1657 | |
c3f6f71d JM |
1658 | if (pi->ctl_fd == 0 && |
1659 | open_procinfo_files (pi, FD_CTL) == 0) | |
1660 | { | |
1661 | return 0; | |
1662 | } | |
c906108c | 1663 | |
0df8b418 | 1664 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1665 | if (step) |
1666 | runflags |= PRSTEP; | |
1667 | if (signo == 0) | |
1668 | runflags |= PRCSIG; | |
0df8b418 | 1669 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1670 | proc_set_current_signal (pi, signo); |
c5aa993b | 1671 | |
c3f6f71d JM |
1672 | #ifdef NEW_PROC_API |
1673 | { | |
37de36c6 | 1674 | procfs_ctl_t cmd[2]; |
c906108c | 1675 | |
c3f6f71d JM |
1676 | cmd[0] = PCRUN; |
1677 | cmd[1] = runflags; | |
1678 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1679 | } | |
1680 | #else /* ioctl method */ | |
1681 | { | |
1682 | prrun_t prrun; | |
c906108c | 1683 | |
c3f6f71d JM |
1684 | memset (&prrun, 0, sizeof (prrun)); |
1685 | prrun.pr_flags = runflags; | |
1686 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1687 | } | |
1688 | #endif | |
c906108c | 1689 | |
c3f6f71d JM |
1690 | return win; |
1691 | } | |
c906108c | 1692 | |
77382aee PA |
1693 | /* Register to trace signals in the process or LWP. Returns non-zero |
1694 | for success, zero for failure. */ | |
c906108c | 1695 | |
c3f6f71d | 1696 | int |
37de36c6 | 1697 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1698 | { |
c3f6f71d JM |
1699 | int win; |
1700 | ||
77382aee PA |
1701 | /* We should never have to apply this operation to any procinfo |
1702 | except the one for the main process. If that ever changes for | |
1703 | any reason, then take out the following clause and replace it | |
1704 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1705 | |
c3f6f71d JM |
1706 | if (pi->tid != 0) |
1707 | pi = find_procinfo_or_die (pi->pid, 0); | |
1708 | ||
1709 | #ifdef NEW_PROC_API | |
1710 | { | |
1711 | struct { | |
37de36c6 | 1712 | procfs_ctl_t cmd; |
c3f6f71d | 1713 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1714 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1715 | } arg; |
c906108c | 1716 | |
c3f6f71d | 1717 | arg.cmd = PCSTRACE; |
37de36c6 | 1718 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1719 | |
c3f6f71d JM |
1720 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1721 | } | |
1722 | #else /* ioctl method */ | |
1723 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1724 | #endif | |
0df8b418 | 1725 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1726 | pi->status_valid = 0; |
c906108c | 1727 | |
c3f6f71d | 1728 | if (!win) |
8a3fe4f8 | 1729 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1730 | return win; |
c906108c SS |
1731 | } |
1732 | ||
77382aee PA |
1733 | /* Register to trace hardware faults in the process or LWP. Returns |
1734 | non-zero for success, zero for failure. */ | |
c906108c | 1735 | |
c3f6f71d | 1736 | int |
fba45db2 | 1737 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1738 | { |
1739 | int win; | |
1740 | ||
77382aee PA |
1741 | /* We should never have to apply this operation to any procinfo |
1742 | except the one for the main process. If that ever changes for | |
1743 | any reason, then take out the following clause and replace it | |
1744 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1745 | |
c3f6f71d JM |
1746 | if (pi->tid != 0) |
1747 | pi = find_procinfo_or_die (pi->pid, 0); | |
1748 | ||
1749 | #ifdef NEW_PROC_API | |
1750 | { | |
1751 | struct { | |
37de36c6 | 1752 | procfs_ctl_t cmd; |
c3f6f71d JM |
1753 | /* Use char array to avoid alignment issues. */ |
1754 | char fltset[sizeof (fltset_t)]; | |
1755 | } arg; | |
c906108c | 1756 | |
c3f6f71d JM |
1757 | arg.cmd = PCSFAULT; |
1758 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1759 | |
c3f6f71d JM |
1760 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1761 | } | |
1762 | #else /* ioctl method */ | |
1763 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1764 | #endif | |
0df8b418 | 1765 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1766 | pi->status_valid = 0; |
c906108c | 1767 | |
c3f6f71d JM |
1768 | return win; |
1769 | } | |
c5aa993b | 1770 | |
77382aee PA |
1771 | /* Register to trace entry to system calls in the process or LWP. |
1772 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1773 | |
c3f6f71d | 1774 | int |
fba45db2 | 1775 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1776 | { |
c3f6f71d JM |
1777 | int win; |
1778 | ||
77382aee PA |
1779 | /* We should never have to apply this operation to any procinfo |
1780 | except the one for the main process. If that ever changes for | |
1781 | any reason, then take out the following clause and replace it | |
1782 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1783 | |
c3f6f71d JM |
1784 | if (pi->tid != 0) |
1785 | pi = find_procinfo_or_die (pi->pid, 0); | |
1786 | ||
1787 | #ifdef NEW_PROC_API | |
1788 | { | |
37de36c6 KB |
1789 | struct gdb_proc_ctl_pcsentry { |
1790 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1791 | /* Use char array to avoid alignment issues. */ |
1792 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1793 | } *argp; |
1794 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1795 | - sizeof (sysset_t) |
37de36c6 | 1796 | + sysset_t_size (pi); |
c3f6f71d | 1797 | |
37de36c6 | 1798 | argp = xmalloc (argp_size); |
c3f6f71d | 1799 | |
37de36c6 KB |
1800 | argp->cmd = PCSENTRY; |
1801 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1802 | ||
1803 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1804 | xfree (argp); | |
c3f6f71d JM |
1805 | } |
1806 | #else /* ioctl method */ | |
1807 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1808 | #endif | |
77382aee PA |
1809 | /* The above operation renders the procinfo's cached pstatus |
1810 | obsolete. */ | |
c3f6f71d | 1811 | pi->status_valid = 0; |
19958708 | 1812 | |
c3f6f71d | 1813 | return win; |
c906108c SS |
1814 | } |
1815 | ||
77382aee PA |
1816 | /* Register to trace exit from system calls in the process or LWP. |
1817 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1818 | |
c3f6f71d | 1819 | int |
fba45db2 | 1820 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1821 | { |
1822 | int win; | |
1823 | ||
77382aee PA |
1824 | /* We should never have to apply this operation to any procinfo |
1825 | except the one for the main process. If that ever changes for | |
1826 | any reason, then take out the following clause and replace it | |
1827 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1828 | |
c3f6f71d JM |
1829 | if (pi->tid != 0) |
1830 | pi = find_procinfo_or_die (pi->pid, 0); | |
1831 | ||
1832 | #ifdef NEW_PROC_API | |
1833 | { | |
37de36c6 KB |
1834 | struct gdb_proc_ctl_pcsexit { |
1835 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1836 | /* Use char array to avoid alignment issues. */ |
1837 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1838 | } *argp; |
1839 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1840 | - sizeof (sysset_t) |
37de36c6 | 1841 | + sysset_t_size (pi); |
c906108c | 1842 | |
37de36c6 | 1843 | argp = xmalloc (argp_size); |
c906108c | 1844 | |
37de36c6 KB |
1845 | argp->cmd = PCSEXIT; |
1846 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1847 | ||
1848 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1849 | xfree (argp); | |
c3f6f71d JM |
1850 | } |
1851 | #else /* ioctl method */ | |
1852 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1853 | #endif | |
77382aee PA |
1854 | /* The above operation renders the procinfo's cached pstatus |
1855 | obsolete. */ | |
c3f6f71d | 1856 | pi->status_valid = 0; |
c906108c | 1857 | |
c3f6f71d JM |
1858 | return win; |
1859 | } | |
c906108c | 1860 | |
77382aee PA |
1861 | /* Specify the set of blocked / held signals in the process or LWP. |
1862 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1863 | |
c3f6f71d | 1864 | int |
37de36c6 | 1865 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1866 | { |
c3f6f71d JM |
1867 | int win; |
1868 | ||
77382aee PA |
1869 | /* We should never have to apply this operation to any procinfo |
1870 | except the one for the main process. If that ever changes for | |
1871 | any reason, then take out the following clause and replace it | |
1872 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1873 | |
c3f6f71d JM |
1874 | if (pi->tid != 0) |
1875 | pi = find_procinfo_or_die (pi->pid, 0); | |
1876 | ||
1877 | #ifdef NEW_PROC_API | |
1878 | { | |
1879 | struct { | |
37de36c6 | 1880 | procfs_ctl_t cmd; |
c3f6f71d | 1881 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1882 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1883 | } arg; |
1884 | ||
1885 | arg.cmd = PCSHOLD; | |
37de36c6 | 1886 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1887 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1888 | } | |
c906108c | 1889 | #else |
c3f6f71d | 1890 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1891 | #endif |
77382aee PA |
1892 | /* The above operation renders the procinfo's cached pstatus |
1893 | obsolete. */ | |
c3f6f71d JM |
1894 | pi->status_valid = 0; |
1895 | ||
1896 | return win; | |
c906108c SS |
1897 | } |
1898 | ||
77382aee PA |
1899 | /* Returns the set of signals that are pending in the process or LWP. |
1900 | Will also copy the sigset if SAVE is non-zero. */ | |
c906108c | 1901 | |
37de36c6 KB |
1902 | gdb_sigset_t * |
1903 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1904 | { |
37de36c6 | 1905 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1906 | |
77382aee PA |
1907 | /* We should never have to apply this operation to any procinfo |
1908 | except the one for the main process. If that ever changes for | |
1909 | any reason, then take out the following clause and replace it | |
1910 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1911 | |
c3f6f71d JM |
1912 | if (pi->tid != 0) |
1913 | pi = find_procinfo_or_die (pi->pid, 0); | |
1914 | ||
1915 | if (!pi->status_valid) | |
1916 | if (!proc_get_status (pi)) | |
1917 | return NULL; | |
1918 | ||
1919 | #ifdef NEW_PROC_API | |
1920 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1921 | #else | |
1922 | ret = &pi->prstatus.pr_sigpend; | |
1923 | #endif | |
1924 | if (save && ret) | |
37de36c6 | 1925 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1926 | |
c3f6f71d JM |
1927 | return ret; |
1928 | } | |
c906108c | 1929 | |
77382aee PA |
1930 | /* Returns the set of signal actions. Will also copy the sigactionset |
1931 | if SAVE is non-zero. */ | |
c906108c | 1932 | |
37de36c6 KB |
1933 | gdb_sigaction_t * |
1934 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 1935 | { |
37de36c6 | 1936 | gdb_sigaction_t *ret = NULL; |
c3f6f71d | 1937 | |
77382aee PA |
1938 | /* We should never have to apply this operation to any procinfo |
1939 | except the one for the main process. If that ever changes for | |
1940 | any reason, then take out the following clause and replace it | |
1941 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1942 | |
c3f6f71d JM |
1943 | if (pi->tid != 0) |
1944 | pi = find_procinfo_or_die (pi->pid, 0); | |
1945 | ||
1946 | if (!pi->status_valid) | |
1947 | if (!proc_get_status (pi)) | |
1948 | return NULL; | |
1949 | ||
1950 | #ifdef NEW_PROC_API | |
1951 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1952 | #else | |
1953 | ret = &pi->prstatus.pr_action; | |
1954 | #endif | |
1955 | if (save && ret) | |
37de36c6 | 1956 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 1957 | |
c3f6f71d JM |
1958 | return ret; |
1959 | } | |
c5aa993b | 1960 | |
77382aee PA |
1961 | /* Returns the set of signals that are held / blocked. Will also copy |
1962 | the sigset if SAVE is non-zero. */ | |
c906108c | 1963 | |
37de36c6 KB |
1964 | gdb_sigset_t * |
1965 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1966 | { |
37de36c6 | 1967 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1968 | |
77382aee PA |
1969 | /* We should never have to apply this operation to any procinfo |
1970 | except the one for the main process. If that ever changes for | |
1971 | any reason, then take out the following clause and replace it | |
1972 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1973 | |
c3f6f71d JM |
1974 | if (pi->tid != 0) |
1975 | pi = find_procinfo_or_die (pi->pid, 0); | |
1976 | ||
1977 | #ifdef NEW_PROC_API | |
1978 | if (!pi->status_valid) | |
1979 | if (!proc_get_status (pi)) | |
1980 | return NULL; | |
1981 | ||
1982 | #ifdef UNIXWARE | |
1983 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1984 | #else |
c3f6f71d JM |
1985 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1986 | #endif /* UNIXWARE */ | |
1987 | #else /* not NEW_PROC_API */ | |
1988 | { | |
37de36c6 | 1989 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1990 | |
1991 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1992 | ret = &sigheld; | |
1993 | } | |
1994 | #endif /* NEW_PROC_API */ | |
1995 | if (save && ret) | |
37de36c6 | 1996 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1997 | |
1998 | return ret; | |
c906108c SS |
1999 | } |
2000 | ||
77382aee PA |
2001 | /* Returns the set of signals that are traced / debugged. Will also |
2002 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 2003 | |
37de36c6 KB |
2004 | gdb_sigset_t * |
2005 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2006 | { |
37de36c6 | 2007 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 2008 | |
77382aee PA |
2009 | /* We should never have to apply this operation to any procinfo |
2010 | except the one for the main process. If that ever changes for | |
2011 | any reason, then take out the following clause and replace it | |
2012 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2013 | |
c3f6f71d JM |
2014 | if (pi->tid != 0) |
2015 | pi = find_procinfo_or_die (pi->pid, 0); | |
2016 | ||
2017 | #ifdef NEW_PROC_API | |
2018 | if (!pi->status_valid) | |
2019 | if (!proc_get_status (pi)) | |
2020 | return NULL; | |
2021 | ||
2022 | ret = &pi->prstatus.pr_sigtrace; | |
2023 | #else | |
2024 | { | |
37de36c6 | 2025 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2026 | |
2027 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2028 | ret = &sigtrace; | |
2029 | } | |
c906108c | 2030 | #endif |
c3f6f71d | 2031 | if (save && ret) |
37de36c6 | 2032 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2033 | |
c3f6f71d JM |
2034 | return ret; |
2035 | } | |
c906108c | 2036 | |
77382aee PA |
2037 | /* Add SIGNO to the set of signals that are traced. Returns non-zero |
2038 | for success, zero for failure. */ | |
c906108c | 2039 | |
c3f6f71d | 2040 | int |
fba45db2 | 2041 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2042 | { |
37de36c6 | 2043 | gdb_sigset_t temp; |
c3f6f71d | 2044 | |
77382aee PA |
2045 | /* We should never have to apply this operation to any procinfo |
2046 | except the one for the main process. If that ever changes for | |
2047 | any reason, then take out the following clause and replace it | |
2048 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2049 | |
c3f6f71d JM |
2050 | if (pi->tid != 0) |
2051 | pi = find_procinfo_or_die (pi->pid, 0); | |
2052 | ||
2053 | if (pi) | |
c906108c | 2054 | { |
c3f6f71d | 2055 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2056 | { |
3c95f01c | 2057 | gdb_praddset (&temp, signo); |
c3f6f71d | 2058 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2059 | } |
2060 | } | |
c5aa993b | 2061 | |
c3f6f71d JM |
2062 | return 0; /* failure */ |
2063 | } | |
c906108c | 2064 | |
77382aee PA |
2065 | /* Remove SIGNO from the set of signals that are traced. Returns |
2066 | non-zero for success, zero for failure. */ | |
c906108c | 2067 | |
c3f6f71d | 2068 | int |
fba45db2 | 2069 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2070 | { |
37de36c6 | 2071 | gdb_sigset_t temp; |
c3f6f71d | 2072 | |
77382aee PA |
2073 | /* We should never have to apply this operation to any procinfo |
2074 | except the one for the main process. If that ever changes for | |
2075 | any reason, then take out the following clause and replace it | |
2076 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2077 | |
c3f6f71d JM |
2078 | if (pi->tid != 0) |
2079 | pi = find_procinfo_or_die (pi->pid, 0); | |
2080 | ||
2081 | if (pi) | |
c906108c | 2082 | { |
c3f6f71d | 2083 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2084 | { |
3c95f01c | 2085 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2086 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2087 | } |
c906108c | 2088 | } |
c906108c | 2089 | |
c3f6f71d | 2090 | return 0; /* failure */ |
c906108c SS |
2091 | } |
2092 | ||
77382aee PA |
2093 | /* Returns the set of hardware faults that are traced /debugged. Will |
2094 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d JM |
2095 | |
2096 | fltset_t * | |
fba45db2 | 2097 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2098 | { |
2099 | fltset_t *ret = NULL; | |
2100 | ||
77382aee PA |
2101 | /* We should never have to apply this operation to any procinfo |
2102 | except the one for the main process. If that ever changes for | |
2103 | any reason, then take out the following clause and replace it | |
2104 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2105 | |
c3f6f71d JM |
2106 | if (pi->tid != 0) |
2107 | pi = find_procinfo_or_die (pi->pid, 0); | |
2108 | ||
2109 | #ifdef NEW_PROC_API | |
2110 | if (!pi->status_valid) | |
2111 | if (!proc_get_status (pi)) | |
2112 | return NULL; | |
2113 | ||
2114 | ret = &pi->prstatus.pr_flttrace; | |
2115 | #else | |
2116 | { | |
2117 | static fltset_t flttrace; | |
2118 | ||
2119 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2120 | ret = &flttrace; | |
2121 | } | |
2122 | #endif | |
2123 | if (save && ret) | |
2124 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2125 | |
c3f6f71d JM |
2126 | return ret; |
2127 | } | |
c906108c | 2128 | |
77382aee PA |
2129 | /* Returns the set of syscalls that are traced /debugged on entry. |
2130 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2131 | |
c3f6f71d | 2132 | sysset_t * |
fba45db2 | 2133 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2134 | { |
2135 | sysset_t *ret = NULL; | |
2136 | ||
77382aee PA |
2137 | /* We should never have to apply this operation to any procinfo |
2138 | except the one for the main process. If that ever changes for | |
2139 | any reason, then take out the following clause and replace it | |
2140 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2141 | |
c3f6f71d JM |
2142 | if (pi->tid != 0) |
2143 | pi = find_procinfo_or_die (pi->pid, 0); | |
2144 | ||
2145 | #ifdef NEW_PROC_API | |
2146 | if (!pi->status_valid) | |
2147 | if (!proc_get_status (pi)) | |
2148 | return NULL; | |
2149 | ||
37de36c6 | 2150 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2151 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2152 | #else /* DYNAMIC_SYSCALLS */ |
2153 | { | |
2154 | static sysset_t *sysentry; | |
2155 | size_t size; | |
2156 | ||
2157 | if (!sysentry) | |
2158 | sysentry = sysset_t_alloc (pi); | |
2159 | ret = sysentry; | |
2160 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2161 | return NULL; | |
2162 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2163 | { | |
2164 | gdb_premptysysset (sysentry); | |
2165 | } | |
2166 | else | |
2167 | { | |
2168 | int rsize; | |
2169 | ||
2170 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 2171 | SEEK_SET) |
37de36c6 KB |
2172 | != (off_t) pi->prstatus.pr_sysentry_offset) |
2173 | return NULL; | |
2174 | size = sysset_t_size (pi); | |
2175 | gdb_premptysysset (sysentry); | |
2176 | rsize = read (pi->status_fd, sysentry, size); | |
2177 | if (rsize < 0) | |
2178 | return NULL; | |
2179 | } | |
2180 | } | |
2181 | #endif /* DYNAMIC_SYSCALLS */ | |
2182 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2183 | { |
2184 | static sysset_t sysentry; | |
c906108c | 2185 | |
c3f6f71d JM |
2186 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2187 | ret = &sysentry; | |
2188 | } | |
37de36c6 | 2189 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2190 | if (save && ret) |
37de36c6 | 2191 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2192 | |
c3f6f71d JM |
2193 | return ret; |
2194 | } | |
c5aa993b | 2195 | |
77382aee PA |
2196 | /* Returns the set of syscalls that are traced /debugged on exit. |
2197 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2198 | |
c3f6f71d | 2199 | sysset_t * |
fba45db2 | 2200 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2201 | { |
c3f6f71d JM |
2202 | sysset_t * ret = NULL; |
2203 | ||
77382aee PA |
2204 | /* We should never have to apply this operation to any procinfo |
2205 | except the one for the main process. If that ever changes for | |
2206 | any reason, then take out the following clause and replace it | |
2207 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2208 | |
c3f6f71d JM |
2209 | if (pi->tid != 0) |
2210 | pi = find_procinfo_or_die (pi->pid, 0); | |
2211 | ||
2212 | #ifdef NEW_PROC_API | |
2213 | if (!pi->status_valid) | |
2214 | if (!proc_get_status (pi)) | |
2215 | return NULL; | |
2216 | ||
37de36c6 | 2217 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2218 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2219 | #else /* DYNAMIC_SYSCALLS */ |
2220 | { | |
2221 | static sysset_t *sysexit; | |
2222 | size_t size; | |
2223 | ||
2224 | if (!sysexit) | |
2225 | sysexit = sysset_t_alloc (pi); | |
2226 | ret = sysexit; | |
2227 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2228 | return NULL; | |
2229 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2230 | { | |
2231 | gdb_premptysysset (sysexit); | |
2232 | } | |
2233 | else | |
2234 | { | |
2235 | int rsize; | |
2236 | ||
77382aee PA |
2237 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2238 | SEEK_SET) | |
37de36c6 KB |
2239 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2240 | return NULL; | |
2241 | size = sysset_t_size (pi); | |
2242 | gdb_premptysysset (sysexit); | |
2243 | rsize = read (pi->status_fd, sysexit, size); | |
2244 | if (rsize < 0) | |
2245 | return NULL; | |
2246 | } | |
2247 | } | |
2248 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2249 | #else |
2250 | { | |
2251 | static sysset_t sysexit; | |
c5aa993b | 2252 | |
c3f6f71d JM |
2253 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2254 | ret = &sysexit; | |
2255 | } | |
2256 | #endif | |
2257 | if (save && ret) | |
37de36c6 | 2258 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2259 | |
2260 | return ret; | |
2261 | } | |
c906108c | 2262 | |
77382aee PA |
2263 | /* The current fault (if any) is cleared; the associated signal will |
2264 | not be sent to the process or LWP when it resumes. Returns | |
2265 | non-zero for success, zero for failure. */ | |
c906108c | 2266 | |
c3f6f71d | 2267 | int |
fba45db2 | 2268 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2269 | { |
2270 | int win; | |
2271 | ||
77382aee PA |
2272 | /* We should never have to apply this operation to any procinfo |
2273 | except the one for the main process. If that ever changes for | |
2274 | any reason, then take out the following clause and replace it | |
2275 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2276 | |
c3f6f71d JM |
2277 | if (pi->tid != 0) |
2278 | pi = find_procinfo_or_die (pi->pid, 0); | |
2279 | ||
2280 | #ifdef NEW_PROC_API | |
2281 | { | |
37de36c6 | 2282 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2283 | |
c3f6f71d JM |
2284 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2285 | } | |
2286 | #else | |
2287 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2288 | #endif | |
2289 | ||
2290 | return win; | |
c906108c SS |
2291 | } |
2292 | ||
77382aee PA |
2293 | /* Set the "current signal" that will be delivered next to the |
2294 | process. NOTE: semantics are different from those of KILL. This | |
2295 | signal will be delivered to the process or LWP immediately when it | |
2296 | is resumed (even if the signal is held/blocked); it will NOT | |
2297 | immediately cause another event of interest, and will NOT first | |
2298 | trap back to the debugger. Returns non-zero for success, zero for | |
2299 | failure. */ | |
c3f6f71d JM |
2300 | |
2301 | int | |
fba45db2 | 2302 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2303 | { |
2304 | int win; | |
2305 | struct { | |
37de36c6 | 2306 | procfs_ctl_t cmd; |
c3f6f71d | 2307 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2308 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2309 | } arg; |
73930d4d | 2310 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2311 | ptid_t wait_ptid; |
2312 | struct target_waitstatus wait_status; | |
c3f6f71d | 2313 | |
77382aee PA |
2314 | /* We should never have to apply this operation to any procinfo |
2315 | except the one for the main process. If that ever changes for | |
2316 | any reason, then take out the following clause and replace it | |
2317 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2318 | |
c3f6f71d JM |
2319 | if (pi->tid != 0) |
2320 | pi = find_procinfo_or_die (pi->pid, 0); | |
2321 | ||
2322 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2323 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2324 | receives a PIOCSSIG with a signal identical to the current |
2325 | signal, it messes up the current signal. Work around the kernel | |
2326 | bug. */ | |
c3f6f71d JM |
2327 | if (signo > 0 && |
2328 | signo == proc_cursig (pi)) | |
0df8b418 | 2329 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2330 | #endif |
2331 | ||
2332 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2333 | get_last_target_status (&wait_ptid, &wait_status); |
2334 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2335 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2336 | && wait_status.value.sig == target_signal_from_host (signo) | |
2337 | && proc_get_status (pi) | |
2338 | #ifdef NEW_PROC_API | |
2339 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2340 | #else | |
2341 | && pi->prstatus.pr_info.si_signo == signo | |
2342 | #endif | |
2343 | ) | |
2344 | /* Use the siginfo associated with the signal being | |
2345 | redelivered. */ | |
2346 | #ifdef NEW_PROC_API | |
73930d4d | 2347 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2348 | #else |
73930d4d | 2349 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2350 | #endif |
2351 | else | |
2352 | { | |
73930d4d KH |
2353 | mysinfo.si_signo = signo; |
2354 | mysinfo.si_code = 0; | |
2355 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2356 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2357 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2358 | } |
c3f6f71d JM |
2359 | |
2360 | #ifdef NEW_PROC_API | |
2361 | arg.cmd = PCSSIG; | |
2362 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2363 | #else | |
2364 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2365 | #endif | |
c906108c | 2366 | |
c3f6f71d JM |
2367 | return win; |
2368 | } | |
c906108c | 2369 | |
77382aee PA |
2370 | /* The current signal (if any) is cleared, and is not sent to the |
2371 | process or LWP when it resumes. Returns non-zero for success, zero | |
2372 | for failure. */ | |
c906108c | 2373 | |
c3f6f71d | 2374 | int |
fba45db2 | 2375 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2376 | { |
2377 | int win; | |
2378 | ||
77382aee PA |
2379 | /* We should never have to apply this operation to any procinfo |
2380 | except the one for the main process. If that ever changes for | |
2381 | any reason, then take out the following clause and replace it | |
2382 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2383 | |
c3f6f71d JM |
2384 | if (pi->tid != 0) |
2385 | pi = find_procinfo_or_die (pi->pid, 0); | |
2386 | ||
2387 | #ifdef NEW_PROC_API | |
2388 | { | |
2389 | struct { | |
37de36c6 | 2390 | procfs_ctl_t cmd; |
c3f6f71d | 2391 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2392 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2393 | } arg; |
73930d4d | 2394 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2395 | |
2396 | arg.cmd = PCSSIG; | |
2397 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2398 | mysinfo.si_signo = 0; |
2399 | mysinfo.si_code = 0; | |
2400 | mysinfo.si_errno = 0; | |
2401 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2402 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2403 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2404 | |
2405 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2406 | } | |
2407 | #else | |
2408 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2409 | #endif | |
c906108c | 2410 | |
c3f6f71d JM |
2411 | return win; |
2412 | } | |
c906108c | 2413 | |
772cf8be MK |
2414 | /* Return the general-purpose registers for the process or LWP |
2415 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2416 | |
c3f6f71d | 2417 | gdb_gregset_t * |
fba45db2 | 2418 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2419 | { |
2420 | if (!pi->status_valid || !pi->gregs_valid) | |
2421 | if (!proc_get_status (pi)) | |
2422 | return NULL; | |
2423 | ||
772cf8be MK |
2424 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2425 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2426 | |
2427 | #ifdef NEW_PROC_API | |
772cf8be | 2428 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2429 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2430 | # else |
c3f6f71d | 2431 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2432 | # endif |
2433 | #else | |
c3f6f71d | 2434 | return &pi->prstatus.pr_reg; |
772cf8be | 2435 | #endif |
c3f6f71d | 2436 | } |
c5aa993b | 2437 | |
772cf8be MK |
2438 | /* Return the general-purpose registers for the process or LWP |
2439 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2440 | |
c3f6f71d | 2441 | gdb_fpregset_t * |
fba45db2 | 2442 | proc_get_fpregs (procinfo *pi) |
c906108c | 2443 | { |
c3f6f71d JM |
2444 | #ifdef NEW_PROC_API |
2445 | if (!pi->status_valid || !pi->fpregs_valid) | |
2446 | if (!proc_get_status (pi)) | |
2447 | return NULL; | |
2448 | ||
772cf8be | 2449 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2450 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2451 | # else |
c3f6f71d | 2452 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2453 | # endif |
c5aa993b | 2454 | |
772cf8be | 2455 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2456 | if (pi->fpregs_valid) |
772cf8be | 2457 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2458 | else |
c906108c | 2459 | { |
772cf8be | 2460 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2461 | { |
c3f6f71d | 2462 | return NULL; |
c906108c | 2463 | } |
c3f6f71d | 2464 | else |
c906108c | 2465 | { |
772cf8be | 2466 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2467 | struct { |
2468 | long pr_count; | |
2469 | tid_t pr_error_thread; | |
2470 | tfpregset_t thread_1; | |
2471 | } thread_fpregs; | |
2472 | ||
2473 | thread_fpregs.pr_count = 1; | |
2474 | thread_fpregs.thread_1.tid = pi->tid; | |
2475 | ||
772cf8be MK |
2476 | if (pi->tid == 0 |
2477 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2478 | { |
2479 | pi->fpregs_valid = 1; | |
772cf8be | 2480 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2481 | } |
772cf8be MK |
2482 | else if (pi->tid != 0 |
2483 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2484 | { |
2485 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2486 | sizeof (pi->fpregset)); | |
2487 | pi->fpregs_valid = 1; | |
772cf8be | 2488 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2489 | } |
2490 | else | |
2491 | { | |
2492 | return NULL; | |
2493 | } | |
772cf8be | 2494 | # else |
c3f6f71d JM |
2495 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2496 | { | |
2497 | pi->fpregs_valid = 1; | |
772cf8be | 2498 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2499 | } |
2500 | else | |
2501 | { | |
2502 | return NULL; | |
2503 | } | |
772cf8be | 2504 | # endif |
c906108c | 2505 | } |
c906108c | 2506 | } |
772cf8be | 2507 | #endif /* NEW_PROC_API */ |
c906108c SS |
2508 | } |
2509 | ||
772cf8be MK |
2510 | /* Write the general-purpose registers back to the process or LWP |
2511 | corresponding to PI. Return non-zero for success, zero for | |
2512 | failure. */ | |
c3f6f71d JM |
2513 | |
2514 | int | |
fba45db2 | 2515 | proc_set_gregs (procinfo *pi) |
c906108c | 2516 | { |
c3f6f71d JM |
2517 | gdb_gregset_t *gregs; |
2518 | int win; | |
c5aa993b | 2519 | |
772cf8be MK |
2520 | gregs = proc_get_gregs (pi); |
2521 | if (gregs == NULL) | |
2522 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2523 | |
772cf8be | 2524 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2525 | { |
c3f6f71d | 2526 | return 0; |
c906108c | 2527 | } |
c3f6f71d | 2528 | else |
c906108c | 2529 | { |
c3f6f71d JM |
2530 | #ifdef NEW_PROC_API |
2531 | struct { | |
37de36c6 | 2532 | procfs_ctl_t cmd; |
c3f6f71d JM |
2533 | /* Use char array to avoid alignment issues. */ |
2534 | char gregs[sizeof (gdb_gregset_t)]; | |
2535 | } arg; | |
2536 | ||
772cf8be | 2537 | arg.cmd = PCSREG; |
c3f6f71d JM |
2538 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2539 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2540 | #else | |
2541 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2542 | #endif | |
c906108c | 2543 | } |
c3f6f71d | 2544 | |
772cf8be | 2545 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2546 | pi->gregs_valid = 0; |
2547 | return win; | |
c906108c SS |
2548 | } |
2549 | ||
772cf8be MK |
2550 | /* Write the floating-pointer registers back to the process or LWP |
2551 | corresponding to PI. Return non-zero for success, zero for | |
2552 | failure. */ | |
c3f6f71d JM |
2553 | |
2554 | int | |
fba45db2 | 2555 | proc_set_fpregs (procinfo *pi) |
c906108c | 2556 | { |
c3f6f71d JM |
2557 | gdb_fpregset_t *fpregs; |
2558 | int win; | |
2559 | ||
772cf8be MK |
2560 | fpregs = proc_get_fpregs (pi); |
2561 | if (fpregs == NULL) | |
2562 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2563 | |
772cf8be | 2564 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2565 | { |
c3f6f71d | 2566 | return 0; |
c906108c | 2567 | } |
c3f6f71d | 2568 | else |
c906108c | 2569 | { |
c3f6f71d JM |
2570 | #ifdef NEW_PROC_API |
2571 | struct { | |
37de36c6 | 2572 | procfs_ctl_t cmd; |
c3f6f71d JM |
2573 | /* Use char array to avoid alignment issues. */ |
2574 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2575 | } arg; | |
2576 | ||
772cf8be | 2577 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2578 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2579 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2580 | #else | |
772cf8be | 2581 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2582 | if (pi->tid == 0) |
2583 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2584 | else | |
2585 | { | |
2586 | struct { | |
2587 | long pr_count; | |
2588 | tid_t pr_error_thread; | |
2589 | tfpregset_t thread_1; | |
2590 | } thread_fpregs; | |
2591 | ||
2592 | thread_fpregs.pr_count = 1; | |
2593 | thread_fpregs.thread_1.tid = pi->tid; | |
2594 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2595 | sizeof (*fpregs)); | |
2596 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2597 | } | |
772cf8be | 2598 | # else |
c3f6f71d | 2599 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2600 | # endif |
2601 | #endif /* NEW_PROC_API */ | |
c906108c | 2602 | } |
c3f6f71d | 2603 | |
772cf8be | 2604 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2605 | pi->fpregs_valid = 0; |
2606 | return win; | |
c906108c SS |
2607 | } |
2608 | ||
77382aee PA |
2609 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2610 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2611 | |
c3f6f71d | 2612 | int |
fba45db2 | 2613 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2614 | { |
2615 | int win; | |
c906108c | 2616 | |
77382aee PA |
2617 | /* We might conceivably apply this operation to an LWP, and the |
2618 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2619 | |
c3f6f71d JM |
2620 | if (pi->ctl_fd == 0 && |
2621 | open_procinfo_files (pi, FD_CTL) == 0) | |
2622 | { | |
2623 | return 0; | |
2624 | } | |
2625 | else | |
2626 | { | |
2627 | #ifdef NEW_PROC_API | |
37de36c6 | 2628 | procfs_ctl_t cmd[2]; |
c906108c | 2629 | |
c3f6f71d JM |
2630 | cmd[0] = PCKILL; |
2631 | cmd[1] = signo; | |
2632 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2633 | #else /* ioctl method */ | |
2634 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2635 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2636 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2637 | #endif | |
2638 | } | |
c906108c | 2639 | |
c3f6f71d JM |
2640 | return win; |
2641 | } | |
c906108c | 2642 | |
77382aee PA |
2643 | /* Find the pid of the process that started this one. Returns the |
2644 | parent process pid, or zero. */ | |
c906108c | 2645 | |
c3f6f71d | 2646 | int |
fba45db2 | 2647 | proc_parent_pid (procinfo *pi) |
c906108c | 2648 | { |
77382aee PA |
2649 | /* We should never have to apply this operation to any procinfo |
2650 | except the one for the main process. If that ever changes for | |
2651 | any reason, then take out the following clause and replace it | |
2652 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2653 | |
c3f6f71d JM |
2654 | if (pi->tid != 0) |
2655 | pi = find_procinfo_or_die (pi->pid, 0); | |
2656 | ||
2657 | if (!pi->status_valid) | |
2658 | if (!proc_get_status (pi)) | |
2659 | return 0; | |
c5aa993b | 2660 | |
c3f6f71d JM |
2661 | return pi->prstatus.pr_ppid; |
2662 | } | |
2663 | ||
9a043c1d AC |
2664 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2665 | (a.k.a void pointer)! */ | |
2666 | ||
1ca8fce0 JB |
2667 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2668 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2669 | static void * |
2670 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2671 | { | |
4e906f53 | 2672 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2673 | void *ptr; |
2674 | ||
4e906f53 | 2675 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2676 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2677 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2678 | return ptr; |
2679 | } | |
1ca8fce0 | 2680 | #endif |
9a043c1d | 2681 | |
a0911fd0 | 2682 | static int |
fba45db2 | 2683 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2684 | { |
d1a7880c PA |
2685 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2686 | /* If neither or these is defined, we can't support watchpoints. | |
2687 | This just avoids possibly failing to compile the below on such | |
2688 | systems. */ | |
c3f6f71d JM |
2689 | return 0; |
2690 | #else | |
0df8b418 MS |
2691 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
2692 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out. */ | |
c3f6f71d JM |
2693 | return 0; |
2694 | #else | |
2695 | struct { | |
37de36c6 | 2696 | procfs_ctl_t cmd; |
c3f6f71d JM |
2697 | char watch[sizeof (prwatch_t)]; |
2698 | } arg; | |
73930d4d | 2699 | prwatch_t pwatch; |
c3f6f71d | 2700 | |
9a043c1d AC |
2701 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2702 | convert a target address into something that can be stored in a | |
2703 | native data structure. */ | |
831e682e | 2704 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2705 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2706 | #else |
73930d4d | 2707 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2708 | #endif |
73930d4d KH |
2709 | pwatch.pr_size = len; |
2710 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2711 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2712 | arg.cmd = PCWATCH; | |
73930d4d | 2713 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2714 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2715 | #else | |
2716 | #if defined (PIOCSWATCH) | |
73930d4d | 2717 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2718 | #else |
2719 | return 0; /* Fail */ | |
2720 | #endif | |
2721 | #endif | |
2722 | #endif | |
2723 | #endif | |
c906108c SS |
2724 | } |
2725 | ||
965b60ee | 2726 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2727 | |
c3f6f71d | 2728 | #include <sys/sysi86.h> |
c906108c | 2729 | |
77382aee PA |
2730 | /* The KEY is actually the value of the lower 16 bits of the GS |
2731 | register for the LWP that we're interested in. Returns the | |
2732 | matching ssh struct (LDT entry). */ | |
c906108c | 2733 | |
c3f6f71d | 2734 | struct ssd * |
fba45db2 | 2735 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2736 | { |
c3f6f71d JM |
2737 | static struct ssd *ldt_entry = NULL; |
2738 | #ifdef NEW_PROC_API | |
2739 | char pathname[MAX_PROC_NAME_SIZE]; | |
2740 | struct cleanup *old_chain = NULL; | |
2741 | int fd; | |
2742 | ||
2743 | /* Allocate space for one LDT entry. | |
2744 | This alloc must persist, because we return a pointer to it. */ | |
2745 | if (ldt_entry == NULL) | |
2746 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2747 | ||
2748 | /* Open the file descriptor for the LDT table. */ | |
2749 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2750 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2751 | { |
c3f6f71d JM |
2752 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2753 | return NULL; | |
c906108c | 2754 | } |
0df8b418 | 2755 | /* Make sure it gets closed again! */ |
004527cb | 2756 | old_chain = make_cleanup_close (fd); |
c906108c | 2757 | |
c3f6f71d JM |
2758 | /* Now 'read' thru the table, find a match and return it. */ |
2759 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2760 | { |
c3f6f71d JM |
2761 | if (ldt_entry->sel == 0 && |
2762 | ldt_entry->bo == 0 && | |
2763 | ldt_entry->acc1 == 0 && | |
2764 | ldt_entry->acc2 == 0) | |
2765 | break; /* end of table */ | |
0df8b418 | 2766 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2767 | if (ldt_entry->sel == key) |
2768 | return ldt_entry; | |
c906108c | 2769 | } |
0df8b418 | 2770 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2771 | return NULL; |
2772 | #else | |
2773 | int nldt, i; | |
2774 | static int nalloc = 0; | |
c906108c | 2775 | |
c3f6f71d JM |
2776 | /* Get the number of LDT entries. */ |
2777 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2778 | { |
c3f6f71d JM |
2779 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2780 | return NULL; | |
c906108c SS |
2781 | } |
2782 | ||
0df8b418 MS |
2783 | /* Allocate space for the number of LDT entries. */ |
2784 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2785 | if (nldt > nalloc) |
c906108c | 2786 | { |
19958708 | 2787 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2788 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2789 | nalloc = nldt; | |
2790 | } | |
19958708 | 2791 | |
c3f6f71d JM |
2792 | /* Read the whole table in one gulp. */ |
2793 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2794 | { | |
2795 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2796 | return NULL; | |
c906108c SS |
2797 | } |
2798 | ||
0df8b418 | 2799 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2800 | for (i = 0; i < nldt; i++) |
2801 | if (ldt_entry[i].sel == key) | |
2802 | return &ldt_entry[i]; | |
c906108c | 2803 | |
0df8b418 | 2804 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2805 | return NULL; |
2806 | #endif | |
2807 | } | |
c906108c | 2808 | |
77382aee | 2809 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2810 | |
2811 | struct ssd * | |
2812 | procfs_find_LDT_entry (ptid_t ptid) | |
2813 | { | |
2814 | gdb_gregset_t *gregs; | |
2815 | int key; | |
2816 | procinfo *pi; | |
2817 | ||
0df8b418 | 2818 | /* Find procinfo for the lwp. */ |
965b60ee JB |
2819 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
2820 | { | |
0b62613e | 2821 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2822 | PIDGET (ptid), TIDGET (ptid)); |
2823 | return NULL; | |
2824 | } | |
0df8b418 | 2825 | /* get its general registers. */ |
965b60ee JB |
2826 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2827 | { | |
0b62613e | 2828 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2829 | PIDGET (ptid), TIDGET (ptid)); |
2830 | return NULL; | |
2831 | } | |
0df8b418 | 2832 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2833 | key = (*gregs)[GS] & 0xffff; |
2834 | ||
0df8b418 | 2835 | /* Find the matching entry and return it. */ |
965b60ee JB |
2836 | return proc_get_LDT_entry (pi, key); |
2837 | } | |
2838 | ||
2839 | #endif | |
c906108c | 2840 | |
c3f6f71d | 2841 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2842 | |
c3f6f71d | 2843 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2844 | |
c3f6f71d JM |
2845 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2846 | since there is a different way to do threads on every OS. */ | |
c906108c | 2847 | |
77382aee | 2848 | /* Returns the number of threads for the process. */ |
c906108c | 2849 | |
c3f6f71d | 2850 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2851 | /* OSF version */ |
19958708 | 2852 | int |
fba45db2 | 2853 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2854 | { |
2855 | int nthreads = 0; | |
c906108c | 2856 | |
c3f6f71d JM |
2857 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2858 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2859 | |
c3f6f71d | 2860 | return nthreads; |
c906108c SS |
2861 | } |
2862 | ||
c3f6f71d JM |
2863 | #else |
2864 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2865 | /* Solaris and Unixware version */ |
c3f6f71d | 2866 | int |
fba45db2 | 2867 | proc_get_nthreads (procinfo *pi) |
c906108c | 2868 | { |
c3f6f71d JM |
2869 | if (!pi->status_valid) |
2870 | if (!proc_get_status (pi)) | |
2871 | return 0; | |
c5aa993b | 2872 | |
77382aee PA |
2873 | /* NEW_PROC_API: only works for the process procinfo, because the |
2874 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2875 | #ifdef NEW_PROC_API |
0df8b418 | 2876 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2877 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2878 | #endif |
c3f6f71d | 2879 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2880 | } |
2881 | ||
c3f6f71d | 2882 | #else |
77382aee | 2883 | /* Default version */ |
c3f6f71d | 2884 | int |
fba45db2 | 2885 | proc_get_nthreads (procinfo *pi) |
c906108c | 2886 | { |
c3f6f71d JM |
2887 | return 0; |
2888 | } | |
2889 | #endif | |
2890 | #endif | |
2891 | ||
77382aee PA |
2892 | /* LWP version. |
2893 | ||
2894 | Return the ID of the thread that had an event of interest. | |
2895 | (ie. the one that hit a breakpoint or other traced event). All | |
2896 | other things being equal, this should be the ID of a thread that is | |
2897 | currently executing. */ | |
c3f6f71d JM |
2898 | |
2899 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2900 | /* Solaris and Unixware version */ |
c3f6f71d | 2901 | int |
fba45db2 | 2902 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2903 | { |
77382aee PA |
2904 | /* Note: this should be applied to the root procinfo for the |
2905 | process, not to the procinfo for an LWP. If applied to the | |
2906 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2907 | that case, find the parent process procinfo. */ | |
19958708 | 2908 | |
c3f6f71d JM |
2909 | if (pi->tid != 0) |
2910 | pi = find_procinfo_or_die (pi->pid, 0); | |
2911 | ||
2912 | if (!pi->status_valid) | |
2913 | if (!proc_get_status (pi)) | |
2914 | return 0; | |
2915 | ||
2916 | #ifdef NEW_PROC_API | |
2917 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2918 | #else |
c3f6f71d | 2919 | return pi->prstatus.pr_who; |
c906108c | 2920 | #endif |
c3f6f71d | 2921 | } |
c906108c | 2922 | |
c3f6f71d JM |
2923 | #else |
2924 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2925 | /* OSF version */ |
19958708 | 2926 | int |
fba45db2 | 2927 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2928 | { |
0df8b418 | 2929 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2930 | return pi->prstatus.pr_tid; |
2931 | #else | |
2932 | return 0; | |
2933 | #endif | |
c906108c SS |
2934 | } |
2935 | ||
c3f6f71d | 2936 | #else |
77382aee | 2937 | /* Default version */ |
19958708 | 2938 | int |
fba45db2 | 2939 | proc_get_current_thread (procinfo *pi) |
c906108c | 2940 | { |
c3f6f71d JM |
2941 | return 0; |
2942 | } | |
2943 | ||
2944 | #endif | |
2945 | #endif | |
c906108c | 2946 | |
77382aee PA |
2947 | /* Discover the IDs of all the threads within the process, and create |
2948 | a procinfo for each of them (chained to the parent). This | |
2949 | unfortunately requires a different method on every OS. Returns | |
2950 | non-zero for success, zero for failure. */ | |
c906108c | 2951 | |
a0911fd0 | 2952 | static int |
fba45db2 | 2953 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2954 | { |
2955 | if (thread && parent) /* sanity */ | |
c906108c | 2956 | { |
c3f6f71d JM |
2957 | thread->status_valid = 0; |
2958 | if (!proc_get_status (thread)) | |
2959 | destroy_one_procinfo (&parent->thread_list, thread); | |
2960 | } | |
2961 | return 0; /* keep iterating */ | |
2962 | } | |
c5aa993b | 2963 | |
c3f6f71d | 2964 | #if defined (PIOCLSTATUS) |
77382aee | 2965 | /* Solaris 2.5 (ioctl) version */ |
c3f6f71d | 2966 | int |
fba45db2 | 2967 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2968 | { |
2969 | gdb_prstatus_t *prstatus; | |
2970 | struct cleanup *old_chain = NULL; | |
2971 | procinfo *thread; | |
2972 | int nlwp, i; | |
2973 | ||
77382aee PA |
2974 | /* We should never have to apply this operation to any procinfo |
2975 | except the one for the main process. If that ever changes for | |
2976 | any reason, then take out the following clause and replace it | |
2977 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2978 | |
c3f6f71d JM |
2979 | if (pi->tid != 0) |
2980 | pi = find_procinfo_or_die (pi->pid, 0); | |
2981 | ||
2982 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2983 | ||
2984 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2985 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2986 | ||
3c37485b | 2987 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2988 | |
b8c9b27d | 2989 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2990 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2991 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2992 | ||
77382aee | 2993 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2994 | for (i = 1; i < nlwp + 1; i++) |
2995 | { | |
2996 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2997 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2998 | |
c3f6f71d JM |
2999 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3000 | thread->status_valid = 1; | |
3001 | } | |
3002 | pi->threads_valid = 1; | |
3003 | do_cleanups (old_chain); | |
3004 | return 1; | |
3005 | } | |
3006 | #else | |
3007 | #ifdef NEW_PROC_API | |
0df8b418 | 3008 | /* Unixware and Solaris 6 (and later) version. */ |
004527cb AC |
3009 | static void |
3010 | do_closedir_cleanup (void *dir) | |
3011 | { | |
3012 | closedir (dir); | |
3013 | } | |
3014 | ||
c3f6f71d | 3015 | int |
fba45db2 | 3016 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3017 | { |
3018 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3019 | struct dirent *direntry; | |
3020 | struct cleanup *old_chain = NULL; | |
3021 | procinfo *thread; | |
3022 | DIR *dirp; | |
3023 | int lwpid; | |
3024 | ||
77382aee PA |
3025 | /* We should never have to apply this operation to any procinfo |
3026 | except the one for the main process. If that ever changes for | |
3027 | any reason, then take out the following clause and replace it | |
3028 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3029 | |
c3f6f71d JM |
3030 | if (pi->tid != 0) |
3031 | pi = find_procinfo_or_die (pi->pid, 0); | |
3032 | ||
3033 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3034 | ||
77382aee PA |
3035 | /* Unixware |
3036 | ||
3037 | Note: this brute-force method is the only way I know of to | |
3038 | accomplish this task on Unixware. This method will also work on | |
3039 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
3040 | way to do this on Solaris, but the margins of this manuscript are | |
3041 | too small to write it here... ;-) */ | |
c3f6f71d JM |
3042 | |
3043 | strcpy (pathname, pi->pathname); | |
3044 | strcat (pathname, "/lwp"); | |
3045 | if ((dirp = opendir (pathname)) == NULL) | |
3046 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3047 | ||
004527cb | 3048 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3049 | while ((direntry = readdir (dirp)) != NULL) |
3050 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3051 | { | |
3052 | lwpid = atoi (&direntry->d_name[0]); | |
3053 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3054 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3055 | } | |
3056 | pi->threads_valid = 1; | |
3057 | do_cleanups (old_chain); | |
3058 | return 1; | |
3059 | } | |
3060 | #else | |
3061 | #ifdef PIOCTLIST | |
77382aee | 3062 | /* OSF version */ |
19958708 | 3063 | int |
fba45db2 | 3064 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3065 | { |
3066 | int nthreads, i; | |
3067 | tid_t *threads; | |
3068 | ||
77382aee PA |
3069 | /* We should never have to apply this operation to any procinfo |
3070 | except the one for the main process. If that ever changes for | |
3071 | any reason, then take out the following clause and replace it | |
3072 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3073 | |
c3f6f71d JM |
3074 | if (pi->tid != 0) |
3075 | pi = find_procinfo_or_die (pi->pid, 0); | |
3076 | ||
3077 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3078 | ||
3079 | nthreads = proc_get_nthreads (pi); | |
3080 | if (nthreads < 2) | |
0df8b418 | 3081 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 3082 | |
3c37485b | 3083 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3084 | |
c3f6f71d JM |
3085 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3086 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3087 | ||
3088 | for (i = 0; i < nthreads; i++) | |
3089 | { | |
3090 | if (!find_procinfo (pi->pid, threads[i])) | |
3091 | if (!create_procinfo (pi->pid, threads[i])) | |
3092 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3093 | } |
c3f6f71d JM |
3094 | pi->threads_valid = 1; |
3095 | return 1; | |
c906108c | 3096 | } |
c3f6f71d | 3097 | #else |
77382aee | 3098 | /* Default version */ |
c3f6f71d | 3099 | int |
fba45db2 | 3100 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3101 | { |
3102 | return 0; | |
3103 | } | |
3104 | #endif /* OSF PIOCTLIST */ | |
3105 | #endif /* NEW_PROC_API */ | |
3106 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3107 | |
77382aee PA |
3108 | /* Given a pointer to a function, call that function once for each lwp |
3109 | in the procinfo list, until the function returns non-zero, in which | |
3110 | event return the value returned by the function. | |
3111 | ||
3112 | Note: this function does NOT call update_threads. If you want to | |
3113 | discover new threads first, you must call that function explicitly. | |
3114 | This function just makes a quick pass over the currently-known | |
3115 | procinfos. | |
3116 | ||
3117 | PI is the parent process procinfo. FUNC is the per-thread | |
3118 | function. PTR is an opaque parameter for function. Returns the | |
3119 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d JM |
3120 | |
3121 | int | |
d0849a9a KB |
3122 | proc_iterate_over_threads (procinfo *pi, |
3123 | int (*func) (procinfo *, procinfo *, void *), | |
3124 | void *ptr) | |
c906108c | 3125 | { |
c3f6f71d JM |
3126 | procinfo *thread, *next; |
3127 | int retval = 0; | |
c906108c | 3128 | |
77382aee PA |
3129 | /* We should never have to apply this operation to any procinfo |
3130 | except the one for the main process. If that ever changes for | |
3131 | any reason, then take out the following clause and replace it | |
3132 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3133 | |
c3f6f71d JM |
3134 | if (pi->tid != 0) |
3135 | pi = find_procinfo_or_die (pi->pid, 0); | |
3136 | ||
3137 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3138 | { |
0df8b418 | 3139 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
3140 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
3141 | break; | |
c906108c | 3142 | } |
c3f6f71d JM |
3143 | |
3144 | return retval; | |
c906108c SS |
3145 | } |
3146 | ||
c3f6f71d JM |
3147 | /* =================== END, Thread "MODULE" =================== */ |
3148 | ||
3149 | /* =================== END, /proc "MODULE" =================== */ | |
3150 | ||
3151 | /* =================== GDB "MODULE" =================== */ | |
3152 | ||
77382aee PA |
3153 | /* Here are all of the gdb target vector functions and their |
3154 | friends. */ | |
c3f6f71d | 3155 | |
39f77062 | 3156 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3157 | static void do_detach (int signo); |
9185ddce | 3158 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 3159 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
3160 | |
3161 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3162 | the startup phase. The following two variables are used to record | |
3163 | the address of the breakpoint, and the code that was replaced by | |
3164 | a breakpoint. */ | |
3165 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3166 | static void *dbx_link_bpt; |
c3f6f71d | 3167 | |
77382aee PA |
3168 | /* Sets up the inferior to be debugged. Registers to trace signals, |
3169 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
3170 | may want to customize that. Returns zero for success (note! | |
3171 | unlike most functions in this module); on failure, returns the LINE | |
3172 | NUMBER where it failed! */ | |
c3f6f71d JM |
3173 | |
3174 | static int | |
fba45db2 | 3175 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3176 | { |
c3f6f71d | 3177 | fltset_t traced_faults; |
37de36c6 KB |
3178 | gdb_sigset_t traced_signals; |
3179 | sysset_t *traced_syscall_entries; | |
3180 | sysset_t *traced_syscall_exits; | |
3181 | int status; | |
c906108c | 3182 | |
c3f6f71d JM |
3183 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3184 | /* On some systems (OSF), we don't trace hardware faults. | |
3185 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
3186 | Wonder why we don't just do that in general? */ |
3187 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 3188 | #else |
0df8b418 MS |
3189 | /* Register to trace hardware faults in the child. */ |
3190 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3191 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3192 | #endif |
3193 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3194 | return __LINE__; | |
c906108c | 3195 | |
2455069d UW |
3196 | /* Initially, register to trace all signals in the child. */ |
3197 | prfillset (&traced_signals); | |
3198 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
3199 | return __LINE__; |
3200 | ||
37de36c6 | 3201 | |
c3f6f71d | 3202 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3203 | traced_syscall_entries = sysset_t_alloc (pi); |
3204 | gdb_premptysysset (traced_syscall_entries); | |
3205 | #ifdef SYS_exit | |
3206 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3207 | #endif | |
c3f6f71d | 3208 | #ifdef SYS_lwpexit |
0df8b418 | 3209 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
3210 | #endif |
3211 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3212 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3213 | #endif | |
3214 | #ifdef DYNAMIC_SYSCALLS | |
3215 | { | |
3216 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 3217 | |
37de36c6 KB |
3218 | if (callnum >= 0) |
3219 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3220 | } | |
c906108c SS |
3221 | #endif |
3222 | ||
37de36c6 KB |
3223 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3224 | xfree (traced_syscall_entries); | |
3225 | if (!status) | |
c3f6f71d JM |
3226 | return __LINE__; |
3227 | ||
3228 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3229 | /* OSF method for tracing exec syscalls. Quoting: | |
3230 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3231 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 3232 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
3233 | { |
3234 | int prfs_flags; | |
3235 | ||
3236 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3237 | return __LINE__; | |
3238 | ||
3239 | prfs_flags |= PRFS_STOPEXEC; | |
3240 | ||
3241 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3242 | return __LINE__; | |
3243 | } | |
3244 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 3245 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
3246 | /* GW: Rationale... |
3247 | Not all systems with /proc have all the exec* syscalls with the same | |
3248 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 3249 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 3250 | |
37de36c6 KB |
3251 | traced_syscall_exits = sysset_t_alloc (pi); |
3252 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3253 | #ifdef SYS_exec |
37de36c6 | 3254 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3255 | #endif |
3256 | #ifdef SYS_execve | |
37de36c6 | 3257 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3258 | #endif |
3259 | #ifdef SYS_execv | |
37de36c6 | 3260 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3261 | #endif |
c5aa993b | 3262 | |
c3f6f71d | 3263 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3264 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3265 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3266 | #endif |
c5aa993b | 3267 | |
0df8b418 | 3268 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3269 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3270 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3271 | #endif |
c5aa993b | 3272 | |
37de36c6 KB |
3273 | #ifdef DYNAMIC_SYSCALLS |
3274 | { | |
3275 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3276 | |
37de36c6 KB |
3277 | if (callnum >= 0) |
3278 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3279 | callnum = find_syscall (pi, "ra_execve"); | |
3280 | if (callnum >= 0) | |
3281 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3282 | } | |
3283 | #endif | |
c906108c | 3284 | |
37de36c6 KB |
3285 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3286 | xfree (traced_syscall_exits); | |
3287 | if (!status) | |
c3f6f71d JM |
3288 | return __LINE__; |
3289 | ||
3290 | #endif /* PRFS_STOPEXEC */ | |
3291 | return 0; | |
c906108c SS |
3292 | } |
3293 | ||
19958708 | 3294 | static void |
136d6dae | 3295 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3296 | { |
c3f6f71d JM |
3297 | char *exec_file; |
3298 | int pid; | |
3299 | ||
74164c56 | 3300 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3301 | |
c3f6f71d | 3302 | if (pid == getpid ()) |
8a3fe4f8 | 3303 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3304 | |
c3f6f71d | 3305 | if (from_tty) |
c906108c | 3306 | { |
c3f6f71d JM |
3307 | exec_file = get_exec_file (0); |
3308 | ||
3309 | if (exec_file) | |
a3f17187 | 3310 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3311 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3312 | else |
a3f17187 | 3313 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3314 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3315 | |
3316 | fflush (stdout); | |
c906108c | 3317 | } |
39f77062 | 3318 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3319 | push_target (ops); |
c3f6f71d JM |
3320 | } |
3321 | ||
19958708 | 3322 | static void |
136d6dae | 3323 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3324 | { |
cc377e6b | 3325 | int sig = 0; |
7f9f62ba | 3326 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3327 | |
3328 | if (args) | |
3329 | sig = atoi (args); | |
c3f6f71d JM |
3330 | |
3331 | if (from_tty) | |
c906108c | 3332 | { |
cc377e6b MK |
3333 | char *exec_file; |
3334 | ||
c3f6f71d | 3335 | exec_file = get_exec_file (0); |
cc377e6b | 3336 | if (exec_file == NULL) |
c3f6f71d | 3337 | exec_file = ""; |
cc377e6b | 3338 | |
a3f17187 | 3339 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3340 | target_pid_to_str (pid_to_ptid (pid))); |
3341 | gdb_flush (gdb_stdout); | |
c906108c | 3342 | } |
19958708 | 3343 | |
cc377e6b MK |
3344 | do_detach (sig); |
3345 | ||
39f77062 | 3346 | inferior_ptid = null_ptid; |
7f9f62ba | 3347 | detach_inferior (pid); |
28439f5e | 3348 | unpush_target (ops); |
c906108c SS |
3349 | } |
3350 | ||
39f77062 KB |
3351 | static ptid_t |
3352 | do_attach (ptid_t ptid) | |
c906108c | 3353 | { |
c3f6f71d | 3354 | procinfo *pi; |
181e7f93 | 3355 | struct inferior *inf; |
c3f6f71d | 3356 | int fail; |
2689673f | 3357 | int lwpid; |
c3f6f71d | 3358 | |
39f77062 | 3359 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3360 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3361 | |
3362 | if (!open_procinfo_files (pi, FD_CTL)) | |
3363 | { | |
3364 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3365 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3366 | PIDGET (ptid)); |
c3f6f71d JM |
3367 | dead_procinfo (pi, errmsg, NOKILL); |
3368 | } | |
c906108c | 3369 | |
c3f6f71d JM |
3370 | /* Stop the process (if it isn't already stopped). */ |
3371 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3372 | { |
c3f6f71d JM |
3373 | pi->was_stopped = 1; |
3374 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3375 | } |
3376 | else | |
3377 | { | |
c3f6f71d JM |
3378 | pi->was_stopped = 0; |
3379 | /* Set the process to run again when we close it. */ | |
3380 | if (!proc_set_run_on_last_close (pi)) | |
3381 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3382 | ||
0df8b418 | 3383 | /* Now stop the process. */ |
c3f6f71d JM |
3384 | if (!proc_stop_process (pi)) |
3385 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3386 | pi->ignore_next_sigstop = 1; | |
c906108c | 3387 | } |
c3f6f71d JM |
3388 | /* Save some of the /proc state to be restored if we detach. */ |
3389 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3390 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3391 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3392 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3393 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3394 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3395 | NOKILL); | |
37de36c6 | 3396 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3397 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3398 | NOKILL); |
3399 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3400 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3401 | ||
3402 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3403 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3404 | ||
6c95b8df PA |
3405 | inf = current_inferior (); |
3406 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3407 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3408 | inf->attach_flag = 1; |
2689673f PA |
3409 | |
3410 | /* Create a procinfo for the current lwp. */ | |
3411 | lwpid = proc_get_current_thread (pi); | |
3412 | create_procinfo (pi->pid, lwpid); | |
3413 | ||
3414 | /* Add it to gdb's thread list. */ | |
3415 | ptid = MERGEPID (pi->pid, lwpid); | |
3416 | add_thread (ptid); | |
3417 | ||
3418 | return ptid; | |
c906108c SS |
3419 | } |
3420 | ||
3421 | static void | |
fba45db2 | 3422 | do_detach (int signo) |
c906108c | 3423 | { |
c3f6f71d | 3424 | procinfo *pi; |
c906108c | 3425 | |
0df8b418 | 3426 | /* Find procinfo for the main process. */ |
39f77062 | 3427 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3428 | if (signo) |
3429 | if (!proc_set_current_signal (pi, signo)) | |
3430 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3431 | |
c3f6f71d JM |
3432 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3433 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3434 | |
c3f6f71d JM |
3435 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3436 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3437 | ||
37de36c6 | 3438 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3439 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3440 | ||
37de36c6 | 3441 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3442 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3443 | ||
3444 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3445 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3446 | ||
3447 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3448 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3449 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3450 | { |
3451 | /* Clear any pending signal. */ | |
3452 | if (!proc_clear_current_fault (pi)) | |
3453 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3454 | ||
1a303dec MS |
3455 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3456 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3457 | ||
c3f6f71d JM |
3458 | if (!proc_set_run_on_last_close (pi)) |
3459 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3460 | } | |
3461 | ||
c3f6f71d | 3462 | destroy_procinfo (pi); |
c906108c SS |
3463 | } |
3464 | ||
772cf8be MK |
3465 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3466 | for all registers. | |
3467 | ||
3468 | ??? Is the following note still relevant? We can't get individual | |
3469 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3470 | don't bother with caching at all in that case. | |
3471 | ||
3472 | NOTE: Since the /proc interface cannot give us individual | |
3473 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3474 | This results in the possibility that we will do unnecessarily many | |
3475 | fetches, since we may be called repeatedly for individual | |
3476 | registers. So we cache the results, and mark the cache invalid | |
3477 | when the process is resumed. */ | |
c3f6f71d | 3478 | |
c906108c | 3479 | static void |
28439f5e PA |
3480 | procfs_fetch_registers (struct target_ops *ops, |
3481 | struct regcache *regcache, int regnum) | |
c906108c | 3482 | { |
772cf8be MK |
3483 | gdb_gregset_t *gregs; |
3484 | procinfo *pi; | |
3485 | int pid = PIDGET (inferior_ptid); | |
3486 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3487 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3488 | |
2689673f | 3489 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3490 | |
3491 | if (pi == NULL) | |
8a3fe4f8 | 3492 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3493 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3494 | |
772cf8be MK |
3495 | gregs = proc_get_gregs (pi); |
3496 | if (gregs == NULL) | |
c3f6f71d JM |
3497 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3498 | ||
56be3814 | 3499 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3500 | |
40a6adc1 | 3501 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3502 | { |
772cf8be MK |
3503 | gdb_fpregset_t *fpregs; |
3504 | ||
40a6adc1 MD |
3505 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3506 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3507 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3508 | return; /* Not a floating point register. */ |
c5aa993b | 3509 | |
772cf8be MK |
3510 | fpregs = proc_get_fpregs (pi); |
3511 | if (fpregs == NULL) | |
60054393 | 3512 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3513 | |
56be3814 | 3514 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3515 | } |
c906108c SS |
3516 | } |
3517 | ||
772cf8be MK |
3518 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3519 | this for all registers. | |
3520 | ||
3521 | NOTE: Since the /proc interface will not read individual registers, | |
3522 | we will cache these requests until the process is resumed, and only | |
3523 | then write them back to the inferior process. | |
77382aee | 3524 | |
772cf8be MK |
3525 | FIXME: is that a really bad idea? Have to think about cases where |
3526 | writing one register might affect the value of others, etc. */ | |
c906108c | 3527 | |
c3f6f71d | 3528 | static void |
28439f5e PA |
3529 | procfs_store_registers (struct target_ops *ops, |
3530 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3531 | { |
772cf8be MK |
3532 | gdb_gregset_t *gregs; |
3533 | procinfo *pi; | |
3534 | int pid = PIDGET (inferior_ptid); | |
3535 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3536 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3537 | |
2689673f | 3538 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3539 | |
3540 | if (pi == NULL) | |
8a3fe4f8 | 3541 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3542 | target_pid_to_str (inferior_ptid)); |
c906108c | 3543 | |
772cf8be MK |
3544 | gregs = proc_get_gregs (pi); |
3545 | if (gregs == NULL) | |
c3f6f71d | 3546 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3547 | |
56be3814 | 3548 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3549 | if (!proc_set_gregs (pi)) |
3550 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3551 | |
40a6adc1 | 3552 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3553 | { |
772cf8be MK |
3554 | gdb_fpregset_t *fpregs; |
3555 | ||
40a6adc1 MD |
3556 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3557 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3558 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3559 | return; /* Not a floating point register. */ |
60054393 | 3560 | |
772cf8be MK |
3561 | fpregs = proc_get_fpregs (pi); |
3562 | if (fpregs == NULL) | |
60054393 MS |
3563 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3564 | ||
56be3814 | 3565 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3566 | if (!proc_set_fpregs (pi)) |
3567 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3568 | } | |
c3f6f71d | 3569 | } |
c906108c | 3570 | |
37de36c6 KB |
3571 | static int |
3572 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3573 | { | |
37de36c6 KB |
3574 | #ifdef SYS_lwp_exit |
3575 | if (scall == SYS_lwp_exit) | |
3576 | return 1; | |
3577 | #endif | |
3578 | #ifdef SYS_lwpexit | |
3579 | if (scall == SYS_lwpexit) | |
3580 | return 1; | |
3581 | #endif | |
3582 | return 0; | |
3583 | } | |
3584 | ||
3585 | static int | |
3586 | syscall_is_exit (procinfo *pi, int scall) | |
3587 | { | |
3588 | #ifdef SYS_exit | |
3589 | if (scall == SYS_exit) | |
3590 | return 1; | |
3591 | #endif | |
3592 | #ifdef DYNAMIC_SYSCALLS | |
3593 | if (find_syscall (pi, "_exit") == scall) | |
3594 | return 1; | |
3595 | #endif | |
3596 | return 0; | |
3597 | } | |
3598 | ||
3599 | static int | |
3600 | syscall_is_exec (procinfo *pi, int scall) | |
3601 | { | |
3602 | #ifdef SYS_exec | |
3603 | if (scall == SYS_exec) | |
3604 | return 1; | |
3605 | #endif | |
3606 | #ifdef SYS_execv | |
3607 | if (scall == SYS_execv) | |
3608 | return 1; | |
3609 | #endif | |
3610 | #ifdef SYS_execve | |
3611 | if (scall == SYS_execve) | |
3612 | return 1; | |
3613 | #endif | |
3614 | #ifdef DYNAMIC_SYSCALLS | |
3615 | if (find_syscall (pi, "_execve")) | |
3616 | return 1; | |
3617 | if (find_syscall (pi, "ra_execve")) | |
3618 | return 1; | |
3619 | #endif | |
3620 | return 0; | |
3621 | } | |
3622 | ||
3623 | static int | |
3624 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3625 | { | |
3626 | #ifdef SYS_lwp_create | |
3627 | if (scall == SYS_lwp_create) | |
3628 | return 1; | |
3629 | #endif | |
3630 | #ifdef SYS_lwpcreate | |
3631 | if (scall == SYS_lwpcreate) | |
3632 | return 1; | |
3633 | #endif | |
3634 | return 0; | |
3635 | } | |
3636 | ||
7434dadd JB |
3637 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3638 | Does nothing if the breakpoint hasn't been inserted or has already | |
3639 | been removed. */ | |
3640 | ||
3641 | static void | |
3642 | remove_dbx_link_breakpoint (void) | |
3643 | { | |
3644 | if (dbx_link_bpt_addr == 0) | |
3645 | return; | |
3646 | ||
3647 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3648 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3649 | ||
3650 | dbx_link_bpt_addr = 0; | |
3651 | dbx_link_bpt = NULL; | |
3652 | } | |
3653 | ||
3654 | #ifdef SYS_syssgi | |
3655 | /* Return the address of the __dbx_link() function in the file | |
3656 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3657 | the symbol was not found. */ | |
3658 | ||
3659 | static CORE_ADDR | |
3660 | dbx_link_addr (bfd *abfd) | |
3661 | { | |
3662 | long storage_needed; | |
3663 | asymbol **symbol_table; | |
3664 | long number_of_symbols; | |
3665 | long i; | |
3666 | ||
3667 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3668 | if (storage_needed <= 0) | |
3669 | return 0; | |
3670 | ||
3671 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3672 | make_cleanup (xfree, symbol_table); | |
3673 | ||
3674 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3675 | ||
3676 | for (i = 0; i < number_of_symbols; i++) | |
3677 | { | |
3678 | asymbol *sym = symbol_table[i]; | |
3679 | ||
3680 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3681 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3682 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3683 | } |
3684 | ||
3685 | /* Symbol not found, return NULL. */ | |
3686 | return 0; | |
3687 | } | |
3688 | ||
3689 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3690 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3691 | and return nonzero. Return zero otherwise. */ |
3692 | ||
3693 | static int | |
3694 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3695 | { | |
3696 | bfd *abfd; | |
3697 | long storage_needed; | |
3698 | CORE_ADDR sym_addr; | |
3699 | ||
3700 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
3701 | if (abfd == NULL) | |
3702 | { | |
3703 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3704 | return 0; | |
3705 | } | |
3706 | ||
3707 | if (!bfd_check_format (abfd, bfd_object)) | |
3708 | { | |
3709 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3710 | symbol in it. */ |
7434dadd JB |
3711 | bfd_close (abfd); |
3712 | return 0; | |
3713 | } | |
3714 | ||
3715 | sym_addr = dbx_link_addr (abfd); | |
3716 | if (sym_addr != 0) | |
3717 | { | |
3718 | /* Insert the breakpoint. */ | |
3719 | dbx_link_bpt_addr = sym_addr; | |
3720 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3721 | sym_addr); | |
3722 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3723 | { |
3724 | warning (_("Failed to insert dbx_link breakpoint.")); | |
3725 | bfd_close (abfd); | |
3726 | return 0; | |
3727 | } | |
7434dadd JB |
3728 | bfd_close (abfd); |
3729 | return 1; | |
3730 | } | |
3731 | ||
3732 | bfd_close (abfd); | |
3733 | return 0; | |
3734 | } | |
3735 | ||
e294797a | 3736 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3737 | space in the process. The callback function receives an open file |
3738 | descriptor for the file corresponding to that mapped address space | |
3739 | (if there is one), and the base address of the mapped space. Quit | |
3740 | when the callback function returns a nonzero value, or at teh end | |
3741 | of the mappings. Returns the first non-zero return value of the | |
3742 | callback function, or zero. */ | |
e294797a JB |
3743 | |
3744 | static int | |
3745 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3746 | void *data) | |
3747 | { | |
3748 | procinfo *pi = data; | |
3749 | int fd; | |
3750 | ||
3751 | #ifdef NEW_PROC_API | |
3752 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3753 | ||
3754 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3755 | return -1; /* sanity */ | |
3756 | ||
3757 | if (map->pr_mapname[0] == 0) | |
3758 | { | |
3759 | fd = -1; /* no map file */ | |
3760 | } | |
3761 | else | |
3762 | { | |
3763 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3764 | /* Note: caller's responsibility to close this fd! */ | |
3765 | fd = open_with_retry (name, O_RDONLY); | |
3766 | /* Note: we don't test the above call for failure; | |
3767 | we just pass the FD on as given. Sometimes there is | |
3768 | no file, so the open may return failure, but that's | |
3769 | not a problem. */ | |
3770 | } | |
3771 | #else | |
3772 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3773 | /* Note: we don't test the above call for failure; | |
3774 | we just pass the FD on as given. Sometimes there is | |
3775 | no file, so the ioctl may return failure, but that's | |
3776 | not a problem. */ | |
3777 | #endif | |
3778 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3779 | } | |
3780 | ||
7434dadd JB |
3781 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3782 | insert a breakpoint at this location and return nonzero. Return | |
3783 | zero otherwise. */ | |
3784 | ||
3785 | static int | |
3786 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3787 | find_memory_region_ftype child_func, |
77382aee | 3788 | void *data) |
7434dadd JB |
3789 | { |
3790 | procinfo *pi = (procinfo *) data; | |
3791 | ||
3792 | /* We know the symbol we're looking for is in a text region, so | |
3793 | only look for it if the region is a text one. */ | |
3794 | if (map->pr_mflags & MA_EXEC) | |
3795 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3796 | ||
3797 | return 0; | |
3798 | } | |
3799 | ||
3800 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3801 | insert a breakpoint at its location, and return nonzero. Return zero | |
3802 | otherwise. */ | |
3803 | ||
3804 | static int | |
3805 | insert_dbx_link_breakpoint (procinfo *pi) | |
3806 | { | |
3807 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3808 | } | |
3809 | #endif | |
3810 | ||
77382aee PA |
3811 | /* Retrieve the next stop event from the child process. If child has |
3812 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3813 | (or possibly wait eventcodes) into gdb internal event codes. | |
3814 | Returns the id of process (and possibly thread) that incurred the | |
3815 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3816 | |
39f77062 | 3817 | static ptid_t |
117de6a9 | 3818 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3819 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3820 | { |
0df8b418 | 3821 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3822 | procinfo *pi; |
39f77062 KB |
3823 | int wstat; |
3824 | int temp_tid; | |
3825 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3826 | int why, what, flags; |
3827 | int retry = 0; | |
c906108c | 3828 | |
c3f6f71d | 3829 | wait_again: |
c906108c | 3830 | |
c3f6f71d JM |
3831 | retry++; |
3832 | wstat = 0; | |
39f77062 | 3833 | retval = pid_to_ptid (-1); |
c906108c | 3834 | |
0df8b418 | 3835 | /* Find procinfo for main process. */ |
39f77062 | 3836 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3837 | if (pi) |
c906108c | 3838 | { |
0df8b418 | 3839 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3840 | pi->status_valid = 0; |
3841 | pi->gregs_valid = 0; | |
3842 | pi->fpregs_valid = 0; | |
3843 | ||
0df8b418 | 3844 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3845 | flags = proc_flags (pi); |
3846 | why = proc_why (pi); | |
3847 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3848 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3849 | #endif |
3850 | /* If child is not stopped, wait for it to stop. */ | |
3851 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3852 | !proc_wait_for_stop (pi)) | |
c906108c | 3853 | { |
0df8b418 | 3854 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3855 | if (errno == ENOENT) |
c906108c | 3856 | { |
39f77062 KB |
3857 | int wait_retval; |
3858 | ||
0df8b418 MS |
3859 | /* /proc file not found; presumably child has terminated. */ |
3860 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3861 | |
0df8b418 | 3862 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
3e43a32a MS |
3863 | error (_("procfs: couldn't stop " |
3864 | "process %d: wait returned %d."), | |
39f77062 | 3865 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d | 3866 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3867 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3868 | retval = pid_to_ptid (wait_retval); |
c906108c | 3869 | } |
d1566ff5 FN |
3870 | else if (errno == EINTR) |
3871 | goto wait_again; | |
c3f6f71d | 3872 | else |
c906108c | 3873 | { |
0df8b418 | 3874 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3875 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3876 | } |
c3f6f71d JM |
3877 | } |
3878 | else | |
3879 | { | |
3880 | /* This long block is reached if either: | |
3881 | a) the child was already stopped, or | |
3882 | b) we successfully waited for the child with wait_for_stop. | |
3883 | This block will analyze the /proc status, and translate it | |
3884 | into a waitstatus for GDB. | |
3885 | ||
3886 | If we actually had to call wait because the /proc file | |
19958708 | 3887 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3888 | because we already have a waitstatus. */ |
3889 | ||
3890 | flags = proc_flags (pi); | |
3891 | why = proc_why (pi); | |
3892 | what = proc_what (pi); | |
3893 | ||
c3f6f71d | 3894 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3895 | { |
c3f6f71d JM |
3896 | #ifdef PR_ASYNC |
3897 | /* If it's running async (for single_thread control), | |
3898 | set it back to normal again. */ | |
3899 | if (flags & PR_ASYNC) | |
3900 | if (!proc_unset_async (pi)) | |
3901 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3902 | #endif | |
3903 | ||
3904 | if (info_verbose) | |
3905 | proc_prettyprint_why (why, what, 1); | |
3906 | ||
3907 | /* The 'pid' we will return to GDB is composed of | |
3908 | the process ID plus the lwp ID. */ | |
3909 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3910 | ||
3911 | switch (why) { | |
3912 | case PR_SIGNALLED: | |
3913 | wstat = (what << 8) | 0177; | |
3914 | break; | |
3915 | case PR_SYSENTRY: | |
37de36c6 | 3916 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3917 | { |
17faa917 DJ |
3918 | if (print_thread_events) |
3919 | printf_unfiltered (_("[%s exited]\n"), | |
3920 | target_pid_to_str (retval)); | |
37de36c6 KB |
3921 | delete_thread (retval); |
3922 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3923 | return retval; | |
3924 | } | |
3925 | else if (syscall_is_exit (pi, what)) | |
3926 | { | |
181e7f93 PA |
3927 | struct inferior *inf; |
3928 | ||
0df8b418 | 3929 | /* Handle SYS_exit call only. */ |
37de36c6 | 3930 | /* Stopped at entry to SYS_exit. |
19958708 | 3931 | Make it runnable, resume it, then use |
37de36c6 | 3932 | the wait system call to get its exit code. |
19958708 | 3933 | Proc_run_process always clears the current |
37de36c6 KB |
3934 | fault and signal. |
3935 | Then return its exit status. */ | |
3936 | pi->status_valid = 0; | |
3937 | wstat = 0; | |
19958708 | 3938 | /* FIXME: what we should do is return |
37de36c6 KB |
3939 | TARGET_WAITKIND_SPURIOUS. */ |
3940 | if (!proc_run_process (pi, 0, 0)) | |
3941 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3942 | |
3943 | inf = find_inferior_pid (pi->pid); | |
3944 | if (inf->attach_flag) | |
c3f6f71d | 3945 | { |
19958708 | 3946 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3947 | return a "success" exit code. Bogus: what if |
3948 | it returns something else? */ | |
3949 | wstat = 0; | |
39f77062 | 3950 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3951 | } |
3952 | else | |
3953 | { | |
3954 | int temp = wait (&wstat); | |
3955 | ||
3956 | /* FIXME: shouldn't I make sure I get the right | |
3957 | event from the right process? If (for | |
3958 | instance) I have killed an earlier inferior | |
3959 | process but failed to clean up after it | |
3960 | somehow, I could get its termination event | |
3961 | here. */ | |
3962 | ||
0df8b418 MS |
3963 | /* If wait returns -1, that's what we return |
3964 | to GDB. */ | |
37de36c6 | 3965 | if (temp < 0) |
39f77062 | 3966 | retval = pid_to_ptid (temp); |
c3f6f71d | 3967 | } |
c3f6f71d | 3968 | } |
37de36c6 KB |
3969 | else |
3970 | { | |
a3f17187 | 3971 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3972 | proc_prettyprint_syscall (proc_what (pi), 0); |
3973 | printf_filtered ("\n"); | |
3974 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3975 | { |
37de36c6 | 3976 | long i, nsysargs, *sysargs; |
c3f6f71d | 3977 | |
37de36c6 KB |
3978 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3979 | (sysargs = proc_sysargs (pi)) != NULL) | |
3980 | { | |
3e43a32a MS |
3981 | printf_filtered (_("%ld syscall arguments:\n"), |
3982 | nsysargs); | |
37de36c6 | 3983 | for (i = 0; i < nsysargs; i++) |
19958708 | 3984 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3985 | i, sysargs[i]); |
3986 | } | |
c3f6f71d | 3987 | |
c3f6f71d | 3988 | } |
c3f6f71d | 3989 | #endif |
37de36c6 KB |
3990 | if (status) |
3991 | { | |
0df8b418 MS |
3992 | /* How to exit gracefully, returning "unknown |
3993 | event". */ | |
37de36c6 | 3994 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3995 | return inferior_ptid; |
37de36c6 KB |
3996 | } |
3997 | else | |
3998 | { | |
3999 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4000 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4001 | goto wait_again; |
4002 | } | |
4003 | } | |
4004 | break; | |
4005 | case PR_SYSEXIT: | |
4006 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4007 | { |
37de36c6 KB |
4008 | /* Hopefully this is our own "fork-child" execing |
4009 | the real child. Hoax this event into a trap, and | |
4010 | GDB will see the child about to execute its start | |
0df8b418 | 4011 | address. */ |
37de36c6 KB |
4012 | wstat = (SIGTRAP << 8) | 0177; |
4013 | } | |
9185ddce | 4014 | #ifdef SYS_syssgi |
77382aee PA |
4015 | else if (what == SYS_syssgi) |
4016 | { | |
4017 | /* see if we can break on dbx_link(). If yes, then | |
4018 | we no longer need the SYS_syssgi notifications. */ | |
4019 | if (insert_dbx_link_breakpoint (pi)) | |
4020 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4021 | FLAG_RESET, 0); | |
4022 | ||
4023 | /* This is an internal event and should be transparent | |
4024 | to wfi, so resume the execution and wait again. See | |
4025 | comment in procfs_init_inferior() for more details. */ | |
4026 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4027 | goto wait_again; | |
4028 | } | |
9185ddce | 4029 | #endif |
37de36c6 KB |
4030 | else if (syscall_is_lwp_create (pi, what)) |
4031 | { | |
77382aee PA |
4032 | /* This syscall is somewhat like fork/exec. We |
4033 | will get the event twice: once for the parent | |
4034 | LWP, and once for the child. We should already | |
4035 | know about the parent LWP, but the child will | |
4036 | be new to us. So, whenever we get this event, | |
4037 | if it represents a new thread, simply add the | |
4038 | thread to the list. */ | |
c3f6f71d | 4039 | |
37de36c6 | 4040 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4041 | temp_tid = proc_get_current_thread (pi); |
4042 | if (!find_procinfo (pi->pid, temp_tid)) | |
4043 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4044 | |
39f77062 | 4045 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4046 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4047 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4048 | add_thread (temp_ptid); |
4049 | ||
0df8b418 | 4050 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 4051 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4052 | return inferior_ptid; |
37de36c6 KB |
4053 | } |
4054 | else if (syscall_is_lwp_exit (pi, what)) | |
4055 | { | |
17faa917 DJ |
4056 | if (print_thread_events) |
4057 | printf_unfiltered (_("[%s exited]\n"), | |
4058 | target_pid_to_str (retval)); | |
37de36c6 KB |
4059 | delete_thread (retval); |
4060 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4061 | return retval; | |
c3f6f71d | 4062 | } |
37de36c6 KB |
4063 | else if (0) |
4064 | { | |
4065 | /* FIXME: Do we need to handle SYS_sproc, | |
4066 | SYS_fork, or SYS_vfork here? The old procfs | |
4067 | seemed to use this event to handle threads on | |
4068 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4069 | that threads were actually separate processes. |
37de36c6 KB |
4070 | Irix, maybe? Anyway, low priority for now. */ |
4071 | } | |
4072 | else | |
4073 | { | |
a3f17187 | 4074 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4075 | proc_prettyprint_syscall (proc_what (pi), 0); |
4076 | printf_filtered ("\n"); | |
4077 | #ifndef PIOCSSPCACT | |
4078 | { | |
4079 | long i, nsysargs, *sysargs; | |
4080 | ||
4081 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4082 | (sysargs = proc_sysargs (pi)) != NULL) | |
4083 | { | |
77382aee PA |
4084 | printf_filtered (_("%ld syscall arguments:\n"), |
4085 | nsysargs); | |
37de36c6 | 4086 | for (i = 0; i < nsysargs; i++) |
19958708 | 4087 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4088 | i, sysargs[i]); |
4089 | } | |
4090 | } | |
c3f6f71d | 4091 | #endif |
37de36c6 | 4092 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4093 | return inferior_ptid; |
37de36c6 | 4094 | } |
c3f6f71d JM |
4095 | break; |
4096 | case PR_REQUESTED: | |
4097 | #if 0 /* FIXME */ | |
4098 | wstat = (SIGSTOP << 8) | 0177; | |
4099 | break; | |
4100 | #else | |
4101 | if (retry < 5) | |
4102 | { | |
a3f17187 | 4103 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4104 | pi->status_valid = 0; |
4105 | goto wait_again; | |
4106 | } | |
4107 | else | |
4108 | { | |
4109 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4110 | temp_tid = proc_get_current_thread (pi); |
4111 | if (!find_procinfo (pi->pid, temp_tid)) | |
4112 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4113 | |
4114 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4115 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4116 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4117 | add_thread (temp_ptid); |
c3f6f71d JM |
4118 | |
4119 | status->kind = TARGET_WAITKIND_STOPPED; | |
4120 | status->value.sig = 0; | |
4121 | return retval; | |
4122 | } | |
4123 | #endif | |
4124 | case PR_JOBCONTROL: | |
4125 | wstat = (what << 8) | 0177; | |
4126 | break; | |
4127 | case PR_FAULTED: | |
7af6341f | 4128 | switch (what) { |
c3f6f71d JM |
4129 | #ifdef FLTWATCH |
4130 | case FLTWATCH: | |
4131 | wstat = (SIGTRAP << 8) | 0177; | |
4132 | break; | |
4133 | #endif | |
4134 | #ifdef FLTKWATCH | |
4135 | case FLTKWATCH: | |
4136 | wstat = (SIGTRAP << 8) | 0177; | |
4137 | break; | |
4138 | #endif | |
0df8b418 | 4139 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 4140 | case FLTPRIV: |
0df8b418 | 4141 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4142 | case FLTILL: |
4143 | #endif | |
4144 | wstat = (SIGILL << 8) | 0177; | |
4145 | break; | |
4146 | case FLTBPT: | |
0df8b418 | 4147 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4148 | case FLTTRACE: |
4149 | #endif | |
77382aee PA |
4150 | /* If we hit our __dbx_link() internal breakpoint, |
4151 | then remove it. See comments in procfs_init_inferior() | |
4152 | for more details. */ | |
4153 | if (dbx_link_bpt_addr != 0 | |
4154 | && dbx_link_bpt_addr | |
fb14de7b | 4155 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 4156 | remove_dbx_link_breakpoint (); |
9185ddce | 4157 | |
c3f6f71d JM |
4158 | wstat = (SIGTRAP << 8) | 0177; |
4159 | break; | |
4160 | case FLTSTACK: | |
4161 | case FLTACCESS: | |
0df8b418 | 4162 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4163 | case FLTBOUNDS: |
4164 | #endif | |
4165 | wstat = (SIGSEGV << 8) | 0177; | |
4166 | break; | |
4167 | case FLTIOVF: | |
4168 | case FLTIZDIV: | |
0df8b418 | 4169 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
4170 | case FLTFPE: |
4171 | #endif | |
4172 | wstat = (SIGFPE << 8) | 0177; | |
4173 | break; | |
3e43a32a | 4174 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
4175 | default: /* FIXME: use si_signo if possible for |
4176 | fault. */ | |
39f77062 | 4177 | retval = pid_to_ptid (-1); |
c3f6f71d | 4178 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4179 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4180 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4181 | error (_("... giving up...")); |
c3f6f71d JM |
4182 | break; |
4183 | } | |
4184 | break; /* case PR_FAULTED: */ | |
4185 | default: /* switch (why) unmatched */ | |
4186 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4187 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4188 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4189 | error (_("... giving up...")); |
c3f6f71d JM |
4190 | break; |
4191 | } | |
77382aee PA |
4192 | /* Got this far without error: If retval isn't in the |
4193 | threads database, add it. */ | |
39f77062 KB |
4194 | if (PIDGET (retval) > 0 && |
4195 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4196 | !in_thread_list (retval)) |
c906108c | 4197 | { |
77382aee PA |
4198 | /* We have a new thread. We need to add it both to |
4199 | GDB's list and to our own. If we don't create a | |
4200 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
4201 | add_thread (retval); |
4202 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4203 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4204 | } |
c906108c | 4205 | } |
0df8b418 | 4206 | else /* Flags do not indicate STOPPED. */ |
c906108c | 4207 | { |
0df8b418 | 4208 | /* surely this can't happen... */ |
c3f6f71d JM |
4209 | printf_filtered ("procfs:%d -- process not stopped.\n", |
4210 | __LINE__); | |
4211 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4212 | error (_("procfs: ...giving up...")); |
c906108c | 4213 | } |
c906108c | 4214 | } |
c906108c | 4215 | |
c3f6f71d JM |
4216 | if (status) |
4217 | store_waitstatus (status, wstat); | |
c906108c SS |
4218 | } |
4219 | ||
c3f6f71d JM |
4220 | return retval; |
4221 | } | |
c906108c | 4222 | |
4e73f23d RM |
4223 | /* Perform a partial transfer to/from the specified object. For |
4224 | memory transfers, fall back to the old memory xfer functions. */ | |
4225 | ||
4226 | static LONGEST | |
4227 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4228 | const char *annex, gdb_byte *readbuf, |
4229 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4230 | { |
4231 | switch (object) | |
4232 | { | |
4233 | case TARGET_OBJECT_MEMORY: | |
4234 | if (readbuf) | |
0b62613e PA |
4235 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4236 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4237 | if (writebuf) |
0b62613e PA |
4238 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4239 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4240 | return -1; |
4241 | ||
4242 | #ifdef NEW_PROC_API | |
4243 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4244 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4245 | offset, len); |
4246 | #endif | |
4247 | ||
4248 | default: | |
4249 | if (ops->beneath != NULL) | |
4250 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4251 | readbuf, writebuf, offset, len); | |
4252 | return -1; | |
4253 | } | |
4254 | } | |
4255 | ||
4256 | ||
d0849a9a KB |
4257 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4258 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4259 | otherwise transfer them from the target. TARGET is unused. | |
4260 | ||
4261 | The return value is 0 if an error occurred or no bytes were | |
4262 | transferred. Otherwise, it will be a positive value which | |
4263 | indicates the number of bytes transferred between gdb and the | |
4264 | target. (Note that the interface also makes provisions for | |
0df8b418 | 4265 | negative values, but this capability isn't implemented here.) */ |
d0849a9a | 4266 | |
c3f6f71d | 4267 | static int |
0b62613e | 4268 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4269 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4270 | { |
4271 | procinfo *pi; | |
4272 | int nbytes = 0; | |
c906108c | 4273 | |
0df8b418 | 4274 | /* Find procinfo for main process. */ |
39f77062 | 4275 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4276 | if (pi->as_fd == 0 && |
4277 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4278 | { |
c3f6f71d JM |
4279 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4280 | return 0; | |
c906108c | 4281 | } |
c906108c | 4282 | |
c3f6f71d | 4283 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4284 | { |
c3f6f71d | 4285 | if (dowrite) |
c906108c | 4286 | { |
c3f6f71d | 4287 | #ifdef NEW_PROC_API |
cce7e648 | 4288 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4289 | #else |
cce7e648 | 4290 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4291 | #endif |
c3f6f71d | 4292 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4293 | } |
c3f6f71d | 4294 | else |
c906108c | 4295 | { |
cce7e648 | 4296 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4297 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4298 | } |
c3f6f71d | 4299 | if (nbytes < 0) |
c906108c | 4300 | { |
c3f6f71d | 4301 | nbytes = 0; |
c906108c | 4302 | } |
c906108c | 4303 | } |
c3f6f71d | 4304 | return nbytes; |
c906108c SS |
4305 | } |
4306 | ||
77382aee PA |
4307 | /* Called by target_resume before making child runnable. Mark cached |
4308 | registers and status's invalid. If there are "dirty" caches that | |
4309 | need to be written back to the child process, do that. | |
c906108c | 4310 | |
77382aee PA |
4311 | File descriptors are also cached. As they are a limited resource, |
4312 | we cannot hold onto them indefinitely. However, as they are | |
4313 | expensive to open, we don't want to throw them away | |
4314 | indescriminately either. As a compromise, we will keep the file | |
4315 | descriptors for the parent process, but discard any file | |
4316 | descriptors we may have accumulated for the threads. | |
4317 | ||
4318 | As this function is called by iterate_over_threads, it always | |
4319 | returns zero (so that iterate_over_threads will keep | |
4320 | iterating). */ | |
c3f6f71d JM |
4321 | |
4322 | static int | |
fba45db2 | 4323 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4324 | { |
77382aee PA |
4325 | /* About to run the child; invalidate caches and do any other |
4326 | cleanup. */ | |
c906108c | 4327 | |
c3f6f71d JM |
4328 | #if 0 |
4329 | if (pi->gregs_dirty) | |
4330 | if (parent == NULL || | |
4331 | proc_get_current_thread (parent) != pi->tid) | |
4332 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4333 | proc_warn (pi, "target_resume, set_gregs", | |
4334 | __LINE__); | |
a97b0ac8 | 4335 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4336 | if (pi->fpregs_dirty) |
4337 | if (parent == NULL || | |
4338 | proc_get_current_thread (parent) != pi->tid) | |
4339 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4340 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4341 | __LINE__); |
c906108c | 4342 | #endif |
c906108c | 4343 | |
c3f6f71d | 4344 | if (parent != NULL) |
c906108c | 4345 | { |
c3f6f71d | 4346 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4347 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4348 | We don't do this to the master (parent) procinfo. */ |
4349 | ||
4350 | close_procinfo_files (pi); | |
c906108c | 4351 | } |
c3f6f71d JM |
4352 | pi->gregs_valid = 0; |
4353 | pi->fpregs_valid = 0; | |
4354 | #if 0 | |
4355 | pi->gregs_dirty = 0; | |
4356 | pi->fpregs_dirty = 0; | |
c906108c | 4357 | #endif |
c3f6f71d JM |
4358 | pi->status_valid = 0; |
4359 | pi->threads_valid = 0; | |
c906108c | 4360 | |
c3f6f71d | 4361 | return 0; |
c906108c SS |
4362 | } |
4363 | ||
0fda6bd2 | 4364 | #if 0 |
77382aee PA |
4365 | /* A callback function for iterate_over_threads. Find the |
4366 | asynchronous signal thread, and make it runnable. See if that | |
4367 | helps matters any. */ | |
c906108c | 4368 | |
c3f6f71d | 4369 | static int |
fba45db2 | 4370 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4371 | { |
c3f6f71d JM |
4372 | #ifdef PR_ASLWP |
4373 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4374 | { |
c3f6f71d JM |
4375 | if (!proc_run_process (pi, 0, -1)) |
4376 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4377 | return 1; | |
c906108c | 4378 | } |
c906108c | 4379 | #endif |
c3f6f71d | 4380 | return 0; |
c906108c | 4381 | } |
0fda6bd2 | 4382 | #endif |
c906108c | 4383 | |
77382aee PA |
4384 | /* Make the child process runnable. Normally we will then call |
4385 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4386 | ||
4387 | If STEP is true, then arrange for the child to stop again after | |
4388 | executing a single instruction. If SIGNO is zero, then cancel any | |
4389 | pending signal; if non-zero, then arrange for the indicated signal | |
4390 | to be delivered to the child when it runs. If PID is -1, then | |
4391 | allow any child thread to run; if non-zero, then allow only the | |
4392 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4393 | |
4394 | static void | |
28439f5e PA |
4395 | procfs_resume (struct target_ops *ops, |
4396 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4397 | { |
c3f6f71d JM |
4398 | procinfo *pi, *thread; |
4399 | int native_signo; | |
4400 | ||
19958708 | 4401 | /* 2.1: |
c3f6f71d | 4402 | prrun.prflags |= PRSVADDR; |
19958708 | 4403 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4404 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4405 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4406 | prrun.prflags |= PRCFAULT; clear current fault. |
4407 | ||
4408 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4409 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4410 | PRSVADDR is unnecessary. |
4411 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4412 | This basically leaves PRSTEP and PRCSIG. | |
4413 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4414 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4415 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4416 | |
0df8b418 | 4417 | /* Find procinfo for main process. */ |
39f77062 | 4418 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4419 | |
77382aee | 4420 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4421 | errno = 0; |
c906108c | 4422 | |
c3f6f71d JM |
4423 | /* Convert signal to host numbering. */ |
4424 | if (signo == 0 || | |
0fda6bd2 | 4425 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4426 | native_signo = 0; |
4427 | else | |
4428 | native_signo = target_signal_to_host (signo); | |
c906108c | 4429 | |
c3f6f71d | 4430 | pi->ignore_next_sigstop = 0; |
c906108c | 4431 | |
77382aee PA |
4432 | /* Running the process voids all cached registers and status. */ |
4433 | /* Void the threads' caches first. */ | |
19958708 | 4434 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4435 | /* Void the process procinfo's caches. */ |
4436 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4437 | |
39f77062 | 4438 | if (PIDGET (ptid) != -1) |
c906108c | 4439 | { |
77382aee PA |
4440 | /* Resume a specific thread, presumably suppressing the |
4441 | others. */ | |
39f77062 | 4442 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4443 | if (thread != NULL) |
c906108c | 4444 | { |
c3f6f71d JM |
4445 | if (thread->tid != 0) |
4446 | { | |
77382aee PA |
4447 | /* We're to resume a specific thread, and not the |
4448 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4449 | #ifdef PR_ASYNC |
4450 | if (!proc_set_async (pi)) | |
4451 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4452 | #endif | |
4453 | #if 0 | |
19958708 | 4454 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4455 | make_signal_thread_runnable, |
4456 | NULL); | |
4457 | #endif | |
0df8b418 MS |
4458 | pi = thread; /* Substitute the thread's procinfo |
4459 | for run. */ | |
c3f6f71d | 4460 | } |
c906108c SS |
4461 | } |
4462 | } | |
c906108c | 4463 | |
c3f6f71d | 4464 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4465 | { |
c3f6f71d | 4466 | if (errno == EBUSY) |
77382aee PA |
4467 | warning (_("resume: target already running. " |
4468 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4469 | else |
4470 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4471 | } |
c3f6f71d | 4472 | } |
c906108c | 4473 | |
77382aee | 4474 | /* Set up to trace signals in the child process. */ |
c906108c | 4475 | |
c3f6f71d | 4476 | static void |
2455069d | 4477 | procfs_pass_signals (int numsigs, unsigned char *pass_signals) |
c3f6f71d | 4478 | { |
37de36c6 | 4479 | gdb_sigset_t signals; |
2455069d UW |
4480 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
4481 | int signo; | |
c906108c | 4482 | |
2455069d UW |
4483 | prfillset (&signals); |
4484 | ||
4485 | for (signo = 0; signo < NSIG; signo++) | |
4486 | { | |
4487 | int target_signo = target_signal_from_host (signo); | |
4488 | if (target_signo < numsigs && pass_signals[target_signo]) | |
4489 | gdb_prdelset (&signals, signo); | |
4490 | } | |
4491 | ||
4492 | if (!proc_set_traced_signals (pi, &signals)) | |
4493 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4494 | } |
c906108c | 4495 | |
77382aee | 4496 | /* Print status information about the child process. */ |
c906108c | 4497 | |
c3f6f71d | 4498 | static void |
fba45db2 | 4499 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4500 | { |
181e7f93 | 4501 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4502 | |
a3f17187 | 4503 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4504 | inf->attach_flag? "attached": "child", |
39f77062 | 4505 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4506 | } |
c906108c | 4507 | |
77382aee PA |
4508 | /* Stop the child process asynchronously, as when the gdb user types |
4509 | control-c or presses a "stop" button. Works by sending | |
4510 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4511 | |
c3f6f71d | 4512 | static void |
f9c72d52 | 4513 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4514 | { |
7e1789f5 | 4515 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4516 | } |
4517 | ||
77382aee PA |
4518 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4519 | should only be applied to the real process, not to an LWP, because | |
4520 | of the check for parent-process. If we need this to work for an | |
4521 | LWP, it needs some more logic. */ | |
c906108c | 4522 | |
c3f6f71d | 4523 | static void |
fba45db2 | 4524 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4525 | { |
4526 | int parent_pid; | |
c906108c | 4527 | |
c3f6f71d JM |
4528 | parent_pid = proc_parent_pid (pi); |
4529 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4530 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4531 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4532 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4533 | file for the inferior. */ | |
4534 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4535 | { | |
4536 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4537 | } | |
4538 | #endif | |
4539 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4540 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4541 | to kill the inferior, otherwise it might remain stopped with a | |
4542 | pending SIGKILL. | |
4543 | We do not check the result of the PIOCSSIG, the inferior might have | |
4544 | died already. */ | |
4545 | { | |
37de36c6 | 4546 | gdb_siginfo_t newsiginfo; |
c906108c | 4547 | |
c3f6f71d JM |
4548 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4549 | newsiginfo.si_signo = SIGKILL; | |
4550 | newsiginfo.si_code = 0; | |
4551 | newsiginfo.si_errno = 0; | |
4552 | newsiginfo.si_pid = getpid (); | |
4553 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4554 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4555 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4556 | } | |
4557 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4558 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4559 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4560 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4561 | destroy_procinfo (pi); | |
c906108c | 4562 | |
c3f6f71d JM |
4563 | /* If pi is GDB's child, wait for it to die. */ |
4564 | if (parent_pid == getpid ()) | |
19958708 | 4565 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4566 | Should we check the returned event? */ |
4567 | { | |
0d06e24b | 4568 | #if 0 |
c3f6f71d | 4569 | int status, ret; |
c906108c | 4570 | |
c3f6f71d JM |
4571 | ret = waitpid (pi->pid, &status, 0); |
4572 | #else | |
4573 | wait (NULL); | |
4574 | #endif | |
4575 | } | |
4576 | } | |
c906108c | 4577 | |
77382aee PA |
4578 | /* We're done debugging it, and we want it to go away. Then we want |
4579 | GDB to forget all about it. */ | |
c906108c | 4580 | |
19958708 | 4581 | static void |
7d85a9c0 | 4582 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4583 | { |
39f77062 | 4584 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4585 | { |
0df8b418 | 4586 | /* Find procinfo for main process. */ |
39f77062 | 4587 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4588 | |
c3f6f71d JM |
4589 | if (pi) |
4590 | unconditionally_kill_inferior (pi); | |
4591 | target_mourn_inferior (); | |
c906108c | 4592 | } |
c3f6f71d JM |
4593 | } |
4594 | ||
77382aee | 4595 | /* Forget we ever debugged this thing! */ |
c906108c | 4596 | |
19958708 | 4597 | static void |
136d6dae | 4598 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4599 | { |
4600 | procinfo *pi; | |
c906108c | 4601 | |
39f77062 | 4602 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4603 | { |
0df8b418 | 4604 | /* Find procinfo for main process. */ |
39f77062 | 4605 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4606 | if (pi) |
4607 | destroy_procinfo (pi); | |
c906108c | 4608 | } |
28439f5e | 4609 | unpush_target (ops); |
8181d85f DJ |
4610 | |
4611 | if (dbx_link_bpt != NULL) | |
4612 | { | |
a6d9a66e | 4613 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4614 | dbx_link_bpt_addr = 0; |
4615 | dbx_link_bpt = NULL; | |
4616 | } | |
4617 | ||
c3f6f71d JM |
4618 | generic_mourn_inferior (); |
4619 | } | |
c906108c | 4620 | |
77382aee PA |
4621 | /* When GDB forks to create a runnable inferior process, this function |
4622 | is called on the parent side of the fork. It's job is to do | |
4623 | whatever is necessary to make the child ready to be debugged, and | |
4624 | then wait for the child to synchronize. */ | |
c906108c | 4625 | |
19958708 | 4626 | static void |
28439f5e | 4627 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4628 | { |
4629 | procinfo *pi; | |
37de36c6 | 4630 | gdb_sigset_t signals; |
c3f6f71d | 4631 | int fail; |
2689673f | 4632 | int lwpid; |
c906108c | 4633 | |
c3f6f71d JM |
4634 | /* This routine called on the parent side (GDB side) |
4635 | after GDB forks the inferior. */ | |
28439f5e | 4636 | push_target (ops); |
c906108c | 4637 | |
c3f6f71d | 4638 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4639 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4640 | |
4641 | if (!open_procinfo_files (pi, FD_CTL)) | |
4642 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4643 | ||
4644 | /* | |
4645 | xmalloc // done | |
4646 | open_procinfo_files // done | |
4647 | link list // done | |
4648 | prfillset (trace) | |
4649 | procfs_notice_signals | |
4650 | prfillset (fault) | |
4651 | prdelset (FLTPAGE) | |
4652 | PIOCWSTOP | |
4653 | PIOCSFAULT | |
4654 | */ | |
4655 | ||
77382aee | 4656 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4657 | if (!(proc_flags (pi) & PR_STOPPED) && |
4658 | !(proc_wait_for_stop (pi))) | |
4659 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4660 | ||
4661 | /* Save some of the /proc state to be restored if we detach. */ | |
4662 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4663 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4664 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4665 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4666 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4667 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4668 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4669 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4670 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4671 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4672 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4673 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4674 | ||
c3f6f71d JM |
4675 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4676 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4677 | ||
0d06e24b JM |
4678 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4679 | and possibly even turning ON kill-on-last-close at this point. But | |
4680 | I can't make that change without careful testing which I don't have | |
4681 | time to do right now... */ | |
c3f6f71d JM |
4682 | /* Turn on run-on-last-close flag so that the child |
4683 | will die if GDB goes away for some reason. */ | |
4684 | if (!proc_set_run_on_last_close (pi)) | |
4685 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4686 | ||
2689673f PA |
4687 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4688 | lwpid = proc_get_current_thread (pi); | |
4689 | ||
4690 | /* Create a procinfo for the main lwp. */ | |
4691 | create_procinfo (pid, lwpid); | |
4692 | ||
4693 | /* We already have a main thread registered in the thread table at | |
4694 | this point, but it didn't have any lwp info yet. Notify the core | |
4695 | about it. This changes inferior_ptid as well. */ | |
4696 | thread_change_ptid (pid_to_ptid (pid), | |
4697 | MERGEPID (pid, lwpid)); | |
c906108c | 4698 | |
46ac7a5d AC |
4699 | /* Typically two, one trap to exec the shell, one to exec the |
4700 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4701 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4702 | |
4703 | #ifdef SYS_syssgi | |
4704 | /* On mips-irix, we need to stop the inferior early enough during | |
4705 | the startup phase in order to be able to load the shared library | |
4706 | symbols and insert the breakpoints that are located in these shared | |
4707 | libraries. Stopping at the program entry point is not good enough | |
4708 | because the -init code is executed before the execution reaches | |
4709 | that point. | |
4710 | ||
4711 | So what we need to do is to insert a breakpoint in the runtime | |
4712 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4713 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4714 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4715 | as rld is not part of the executable we are running, and thus we need |
4716 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4717 | |
9185ddce JB |
4718 | For this, we trace all syssgi() syscall exit events. Each time |
4719 | we detect such an event, we iterate over each text memory maps, | |
4720 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4721 | When found, we know that rld has been mapped, and that we can insert | |
4722 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4723 | has been inserted, the syssgi() notifications are no longer necessary, | |
4724 | so they should be canceled. */ | |
4725 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4726 | #endif |
c3f6f71d | 4727 | } |
c906108c | 4728 | |
77382aee PA |
4729 | /* When GDB forks to create a new process, this function is called on |
4730 | the child side of the fork before GDB exec's the user program. Its | |
4731 | job is to make the child minimally debuggable, so that the parent | |
4732 | GDB process can connect to the child and take over. This function | |
4733 | should do only the minimum to make that possible, and to | |
4734 | synchronize with the parent process. The parent process should | |
4735 | take care of the details. */ | |
c3f6f71d JM |
4736 | |
4737 | static void | |
fba45db2 | 4738 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4739 | { |
4740 | /* This routine called on the child side (inferior side) | |
4741 | after GDB forks the inferior. It must use only local variables, | |
4742 | because it may be sharing data space with its parent. */ | |
c906108c | 4743 | |
c3f6f71d | 4744 | procinfo *pi; |
37de36c6 | 4745 | sysset_t *exitset; |
c906108c | 4746 | |
c3f6f71d | 4747 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4748 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4749 | |
c3f6f71d JM |
4750 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4751 | { | |
4752 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4753 | gdb_flush (gdb_stderr); | |
77382aee PA |
4754 | /* No need to call "dead_procinfo", because we're going to |
4755 | exit. */ | |
c3f6f71d JM |
4756 | _exit (127); |
4757 | } | |
c906108c | 4758 | |
c3f6f71d JM |
4759 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4760 | /* OSF method for tracing exec syscalls. Quoting: | |
4761 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4762 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4763 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4764 | { |
4765 | int prfs_flags; | |
c906108c | 4766 | |
c3f6f71d JM |
4767 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4768 | { | |
4769 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4770 | gdb_flush (gdb_stderr); | |
4771 | _exit (127); | |
4772 | } | |
4773 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4774 | |
c3f6f71d JM |
4775 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4776 | { | |
4777 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4778 | gdb_flush (gdb_stderr); | |
4779 | _exit (127); | |
4780 | } | |
4781 | } | |
4782 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4783 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4784 | /* GW: Rationale... |
4785 | Not all systems with /proc have all the exec* syscalls with the same | |
4786 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4787 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4788 | |
37de36c6 KB |
4789 | exitset = sysset_t_alloc (pi); |
4790 | gdb_premptysysset (exitset); | |
c3f6f71d | 4791 | #ifdef SYS_exec |
37de36c6 | 4792 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4793 | #endif |
4794 | #ifdef SYS_execve | |
37de36c6 | 4795 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4796 | #endif |
4797 | #ifdef SYS_execv | |
37de36c6 | 4798 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4799 | #endif |
37de36c6 KB |
4800 | #ifdef DYNAMIC_SYSCALLS |
4801 | { | |
4802 | int callnum = find_syscall (pi, "execve"); | |
4803 | ||
4804 | if (callnum >= 0) | |
4805 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4806 | |
37de36c6 KB |
4807 | callnum = find_syscall (pi, "ra_execve"); |
4808 | if (callnum >= 0) | |
4809 | gdb_praddsysset (exitset, callnum); | |
4810 | } | |
4811 | #endif /* DYNAMIC_SYSCALLS */ | |
4812 | ||
4813 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4814 | { |
c3f6f71d JM |
4815 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4816 | gdb_flush (gdb_stderr); | |
4817 | _exit (127); | |
c906108c | 4818 | } |
c3f6f71d JM |
4819 | #endif /* PRFS_STOPEXEC */ |
4820 | ||
0df8b418 | 4821 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4822 | /* Turn off inherit on fork flag so that all grand-children |
4823 | of gdb start with tracing flags cleared. */ | |
4824 | if (!proc_unset_inherit_on_fork (pi)) | |
4825 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4826 | ||
4827 | /* Turn off run on last close flag, so that the child process | |
4828 | cannot run away just because we close our handle on it. | |
4829 | We want it to wait for the parent to attach. */ | |
4830 | if (!proc_unset_run_on_last_close (pi)) | |
4831 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4832 | ||
19958708 | 4833 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4834 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4835 | /*destroy_procinfo (pi);*/ |
c906108c | 4836 | } |
c906108c | 4837 | |
77382aee PA |
4838 | /* This function is called BEFORE gdb forks the inferior process. Its |
4839 | only real responsibility is to set things up for the fork, and tell | |
4840 | GDB which two functions to call after the fork (one for the parent, | |
4841 | and one for the child). | |
4842 | ||
4843 | This function does a complicated search for a unix shell program, | |
4844 | which it then uses to parse arguments and environment variables to | |
4845 | be sent to the child. I wonder whether this code could not be | |
4846 | abstracted out and shared with other unix targets such as | |
4847 | inf-ptrace? */ | |
c906108c SS |
4848 | |
4849 | static void | |
136d6dae VP |
4850 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4851 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4852 | { |
4853 | char *shell_file = getenv ("SHELL"); | |
4854 | char *tryname; | |
28439f5e PA |
4855 | int pid; |
4856 | ||
c906108c SS |
4857 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4858 | { | |
4859 | ||
4860 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4861 | just do this the normal way (via execlp, which operates by |
4862 | attempting an exec for each element of the PATH until it | |
4863 | finds one which succeeds), then there will be an exec for | |
4864 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4865 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4866 | for these failed execs with the ones for successful execs | |
4867 | (whether the exec has succeeded is stored at that time in the | |
4868 | carry bit or some such architecture-specific and | |
4869 | non-ABI-specified place). | |
4870 | ||
4871 | So I can't think of anything better than to search the PATH | |
4872 | now. This has several disadvantages: (1) There is a race | |
4873 | condition; if we find a file now and it is deleted before we | |
4874 | exec it, we lose, even if the deletion leaves a valid file | |
4875 | further down in the PATH, (2) there is no way to know exactly | |
4876 | what an executable (in the sense of "capable of being | |
4877 | exec'd") file is. Using access() loses because it may lose | |
4878 | if the caller is the superuser; failing to use it loses if | |
4879 | there are ACLs or some such. */ | |
c906108c SS |
4880 | |
4881 | char *p; | |
4882 | char *p1; | |
4883 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4884 | path is used from within GDB. */ |
c906108c SS |
4885 | char *path = getenv ("PATH"); |
4886 | int len; | |
4887 | struct stat statbuf; | |
4888 | ||
4889 | if (path == NULL) | |
4890 | path = "/bin:/usr/bin"; | |
4891 | ||
4892 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4893 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4894 | { |
4895 | p1 = strchr (p, ':'); | |
4896 | if (p1 != NULL) | |
4897 | len = p1 - p; | |
4898 | else | |
4899 | len = strlen (p); | |
4900 | strncpy (tryname, p, len); | |
4901 | tryname[len] = '\0'; | |
4902 | strcat (tryname, "/"); | |
4903 | strcat (tryname, shell_file); | |
4904 | if (access (tryname, X_OK) < 0) | |
4905 | continue; | |
4906 | if (stat (tryname, &statbuf) < 0) | |
4907 | continue; | |
4908 | if (!S_ISREG (statbuf.st_mode)) | |
4909 | /* We certainly need to reject directories. I'm not quite | |
4910 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4911 | that people want to exec() these things. */ | |
4912 | continue; | |
4913 | break; | |
4914 | } | |
4915 | if (p == NULL) | |
4916 | /* Not found. This must be an error rather than merely passing | |
4917 | the file to execlp(), because execlp() would try all the | |
4918 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4919 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4920 | __LINE__, shell_file); |
c906108c SS |
4921 | |
4922 | shell_file = tryname; | |
4923 | } | |
4924 | ||
28439f5e | 4925 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4926 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4927 | |
4928 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4929 | } |
4930 | ||
4931 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4932 | |
27087a3d JB |
4933 | static void |
4934 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4935 | { | |
9185ddce | 4936 | #ifdef SYS_syssgi |
77382aee | 4937 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4938 | They should normally have been removed by now, but they may still |
4939 | be activated if the inferior doesn't use shared libraries, or if | |
4940 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4941 | See procfs_init_inferior() for more details. |
4942 | ||
4943 | Since these notifications are only ever enabled when we spawned | |
4944 | the inferior ourselves, there is nothing to do when the inferior | |
4945 | was created by attaching to an already running process, or when | |
4946 | debugging a core file. */ | |
4947 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4948 | return; | |
4949 | ||
9185ddce | 4950 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4951 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4952 | #endif |
c906108c SS |
4953 | } |
4954 | ||
77382aee | 4955 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4956 | |
c3f6f71d | 4957 | static int |
fba45db2 | 4958 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4959 | { |
39f77062 | 4960 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4961 | |
2689673f | 4962 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4963 | add_thread (gdb_threadid); |
c906108c | 4964 | |
c3f6f71d JM |
4965 | return 0; |
4966 | } | |
4967 | ||
77382aee PA |
4968 | /* Query all the threads that the target knows about, and give them |
4969 | back to GDB to add to its list. */ | |
c3f6f71d JM |
4970 | |
4971 | void | |
28439f5e | 4972 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4973 | { |
4974 | procinfo *pi; | |
4975 | ||
0df8b418 | 4976 | /* Find procinfo for main process. */ |
39f77062 | 4977 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4978 | proc_update_threads (pi); |
4979 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4980 | } |
4981 | ||
77382aee PA |
4982 | /* Return true if the thread is still 'alive'. This guy doesn't |
4983 | really seem to be doing his job. Got to investigate how to tell | |
4984 | when a thread is really gone. */ | |
c906108c | 4985 | |
c906108c | 4986 | static int |
28439f5e | 4987 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4988 | { |
c3f6f71d JM |
4989 | int proc, thread; |
4990 | procinfo *pi; | |
c906108c | 4991 | |
39f77062 KB |
4992 | proc = PIDGET (ptid); |
4993 | thread = TIDGET (ptid); | |
0df8b418 | 4994 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4995 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4996 | return 0; | |
4997 | ||
4998 | /* If I can't get its status, it ain't alive! | |
4999 | What's more, I need to forget about it! */ | |
5000 | if (!proc_get_status (pi)) | |
5001 | { | |
5002 | destroy_procinfo (pi); | |
5003 | return 0; | |
5004 | } | |
77382aee PA |
5005 | /* I couldn't have got its status if it weren't alive, so it's |
5006 | alive. */ | |
c3f6f71d | 5007 | return 1; |
c906108c | 5008 | } |
c3f6f71d | 5009 | |
77382aee PA |
5010 | /* Convert PTID to a string. Returns the string in a static |
5011 | buffer. */ | |
c3f6f71d JM |
5012 | |
5013 | char * | |
117de6a9 | 5014 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5015 | { |
5016 | static char buf[80]; | |
c3f6f71d | 5017 | |
5240ceac MK |
5018 | if (TIDGET (ptid) == 0) |
5019 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5020 | else |
21749010 | 5021 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5022 | |
5023 | return buf; | |
c3f6f71d JM |
5024 | } |
5025 | ||
77382aee | 5026 | /* Insert a watchpoint. */ |
c3f6f71d | 5027 | |
a0911fd0 | 5028 | static int |
39f77062 | 5029 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 5030 | int after) |
c906108c | 5031 | { |
c3f6f71d | 5032 | #ifndef UNIXWARE |
37de36c6 | 5033 | #ifndef AIX5 |
c3f6f71d | 5034 | int pflags = 0; |
19958708 | 5035 | procinfo *pi; |
c3f6f71d | 5036 | |
19958708 | 5037 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5038 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d | 5039 | |
0df8b418 MS |
5040 | /* Translate from GDB's flags to /proc's. */ |
5041 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 5042 | { |
0df8b418 | 5043 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
5044 | case hw_write: /* default watchpoint (write) */ |
5045 | pflags = WRITE_WATCHFLAG; | |
5046 | break; | |
5047 | case hw_read: /* read watchpoint */ | |
5048 | pflags = READ_WATCHFLAG; | |
5049 | break; | |
5050 | case hw_access: /* access watchpoint */ | |
5051 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5052 | break; | |
5053 | case hw_execute: /* execution HW breakpoint */ | |
5054 | pflags = EXEC_WATCHFLAG; | |
5055 | break; | |
0df8b418 | 5056 | default: /* Something weird. Return error. */ |
c906108c | 5057 | return -1; |
c3f6f71d | 5058 | } |
0df8b418 | 5059 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
5060 | pflags |= AFTER_WATCHFLAG; |
5061 | } | |
5062 | ||
5063 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5064 | { | |
0df8b418 | 5065 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
5066 | return -1; /* fail */ |
5067 | /* GDB may try to remove the same watchpoint twice. | |
5068 | If a remove request returns no match, don't error. */ | |
c906108c | 5069 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5070 | return 0; /* ignore */ |
5071 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5072 | } |
37de36c6 KB |
5073 | #endif /* AIX5 */ |
5074 | #endif /* UNIXWARE */ | |
c906108c SS |
5075 | return 0; |
5076 | } | |
5077 | ||
1e03ad20 KB |
5078 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5079 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5080 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5081 | far. | |
19958708 | 5082 | |
1e03ad20 KB |
5083 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5084 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5085 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5086 | |
5087 | static int | |
5088 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5089 | { | |
1e03ad20 KB |
5090 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5091 | and target pointers must be of the same size. If they are not, | |
5092 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5093 | fact that proc_set_watchpoint() calls |
5094 | procfs_address_to_host_pointer(); a close inspection of | |
5095 | procfs_address_to_host_pointer will reveal that an internal error | |
5096 | will be generated when the host and target pointer sizes are | |
5097 | different. */ | |
4e906f53 | 5098 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
f4a14ae6 | 5099 | |
4e906f53 | 5100 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
5101 | return 0; |
5102 | ||
5103 | /* Other tests here??? */ | |
5104 | ||
5105 | return 1; | |
1e03ad20 KB |
5106 | } |
5107 | ||
77382aee PA |
5108 | /* Returns non-zero if process is stopped on a hardware watchpoint |
5109 | fault, else returns zero. */ | |
c3f6f71d | 5110 | |
25513619 PA |
5111 | static int |
5112 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5113 | { |
c3f6f71d | 5114 | procinfo *pi; |
c906108c | 5115 | |
25513619 | 5116 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 5117 | |
c3f6f71d | 5118 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5119 | { |
c3f6f71d | 5120 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5121 | { |
c906108c | 5122 | #ifdef FLTWATCH |
c3f6f71d JM |
5123 | if (proc_what (pi) == FLTWATCH) |
5124 | return 1; | |
c906108c SS |
5125 | #endif |
5126 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5127 | if (proc_what (pi) == FLTKWATCH) |
5128 | return 1; | |
c906108c | 5129 | #endif |
c3f6f71d | 5130 | } |
c906108c SS |
5131 | } |
5132 | return 0; | |
5133 | } | |
c906108c | 5134 | |
77382aee PA |
5135 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
5136 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
5137 | address. This function is only called if | |
5138 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
5139 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
5140 | |
5141 | static int | |
5142 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
5143 | { | |
5144 | procinfo *pi; | |
5145 | ||
5146 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5147 | return proc_watchpoint_address (pi, addr); | |
5148 | } | |
5149 | ||
25513619 | 5150 | static int |
0cf6dd15 TJB |
5151 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
5152 | struct expression *cond) | |
25513619 | 5153 | { |
d92524f1 | 5154 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5155 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5156 | { |
5157 | /* When a hardware watchpoint fires off the PC will be left at | |
5158 | the instruction following the one which caused the | |
5159 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5160 | the watchpoint. */ | |
5161 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5162 | } | |
5163 | else | |
5164 | { | |
5165 | /* When a hardware watchpoint fires off the PC will be left at | |
5166 | the instruction which caused the watchpoint. It will be | |
5167 | necessary for GDB to step over the watchpoint. */ | |
5168 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5169 | } | |
5170 | } | |
5171 | ||
5172 | static int | |
0cf6dd15 TJB |
5173 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
5174 | struct expression *cond) | |
25513619 PA |
5175 | { |
5176 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5177 | } | |
5178 | ||
5179 | static int | |
5180 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5181 | { | |
5182 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5183 | system can support "thousands" of hardware watchpoints, but gives | |
5184 | no method for finding out how many; It doesn't say anything about | |
5185 | the allowed size for the watched area either. So we just tell | |
5186 | GDB 'yes'. */ | |
5187 | return 1; | |
5188 | } | |
5189 | ||
5190 | void | |
5191 | procfs_use_watchpoints (struct target_ops *t) | |
5192 | { | |
5193 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5194 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5195 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5196 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5197 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 5198 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
5199 | } |
5200 | ||
77382aee PA |
5201 | /* Memory Mappings Functions: */ |
5202 | ||
5203 | /* Call a callback function once for each mapping, passing it the | |
5204 | mapping, an optional secondary callback function, and some optional | |
5205 | opaque data. Quit and return the first non-zero value returned | |
5206 | from the callback. | |
5207 | ||
5208 | PI is the procinfo struct for the process to be mapped. FUNC is | |
5209 | the callback function to be called by this iterator. DATA is the | |
5210 | optional opaque data to be passed to the callback function. | |
5211 | CHILD_FUNC is the optional secondary function pointer to be passed | |
5212 | to the child function. Returns the first non-zero return value | |
5213 | from the callback function, or zero. */ | |
831e682e MS |
5214 | |
5215 | static int | |
b8edc417 | 5216 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 5217 | void *data, |
19958708 | 5218 | int (*func) (struct prmap *map, |
b8edc417 | 5219 | find_memory_region_ftype child_func, |
831e682e MS |
5220 | void *data)) |
5221 | { | |
5222 | char pathname[MAX_PROC_NAME_SIZE]; | |
5223 | struct prmap *prmaps; | |
5224 | struct prmap *prmap; | |
5225 | int funcstat; | |
5226 | int map_fd; | |
5227 | int nmap; | |
0a86f364 | 5228 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
5229 | #ifdef NEW_PROC_API |
5230 | struct stat sbuf; | |
5231 | #endif | |
5232 | ||
19958708 | 5233 | /* Get the number of mappings, allocate space, |
831e682e MS |
5234 | and read the mappings into prmaps. */ |
5235 | #ifdef NEW_PROC_API | |
0df8b418 | 5236 | /* Open map fd. */ |
831e682e MS |
5237 | sprintf (pathname, "/proc/%d/map", pi->pid); |
5238 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5239 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5240 | ||
0df8b418 | 5241 | /* Make sure it gets closed again. */ |
831e682e MS |
5242 | make_cleanup_close (map_fd); |
5243 | ||
19958708 | 5244 | /* Use stat to determine the file size, and compute |
831e682e MS |
5245 | the number of prmap_t objects it contains. */ |
5246 | if (fstat (map_fd, &sbuf) != 0) | |
5247 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5248 | ||
5249 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5250 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5251 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5252 | != (nmap * sizeof (*prmaps))) | |
5253 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5254 | #else | |
5255 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5256 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5257 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5258 | ||
5259 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5260 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5261 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5262 | #endif | |
5263 | ||
5264 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5265 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5266 | { |
5267 | do_cleanups (cleanups); | |
5268 | return funcstat; | |
5269 | } | |
831e682e | 5270 | |
0a86f364 | 5271 | do_cleanups (cleanups); |
831e682e MS |
5272 | return 0; |
5273 | } | |
5274 | ||
77382aee | 5275 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5276 | function for each memory region. |
77382aee | 5277 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5278 | |
5279 | static int | |
19958708 | 5280 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5281 | find_memory_region_ftype func, void *data) |
be4d1333 | 5282 | { |
bf75638e | 5283 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5284 | map->pr_size, |
be4d1333 MS |
5285 | (map->pr_mflags & MA_READ) != 0, |
5286 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5287 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5288 | data); |
5289 | } | |
5290 | ||
77382aee PA |
5291 | /* External interface. Calls a callback function once for each |
5292 | mapped memory region in the child process, passing as arguments: | |
5293 | ||
5294 | CORE_ADDR virtual_address, | |
5295 | unsigned long size, | |
5296 | int read, TRUE if region is readable by the child | |
5297 | int write, TRUE if region is writable by the child | |
5298 | int execute TRUE if region is executable by the child. | |
5299 | ||
5300 | Stops iterating and returns the first non-zero value returned by | |
5301 | the callback. */ | |
be4d1333 MS |
5302 | |
5303 | static int | |
b8edc417 | 5304 | proc_find_memory_regions (find_memory_region_ftype func, void *data) |
be4d1333 MS |
5305 | { |
5306 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5307 | ||
19958708 | 5308 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5309 | find_memory_regions_callback); |
5310 | } | |
5311 | ||
77382aee | 5312 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5313 | |
388faa48 | 5314 | static char * |
5ae5f592 | 5315 | mappingflags (long flags) |
388faa48 MS |
5316 | { |
5317 | static char asciiflags[8]; | |
5318 | ||
5319 | strcpy (asciiflags, "-------"); | |
5320 | #if defined (MA_PHYS) | |
5321 | if (flags & MA_PHYS) | |
5322 | asciiflags[0] = 'd'; | |
5323 | #endif | |
5324 | if (flags & MA_STACK) | |
5325 | asciiflags[1] = 's'; | |
5326 | if (flags & MA_BREAK) | |
5327 | asciiflags[2] = 'b'; | |
5328 | if (flags & MA_SHARED) | |
5329 | asciiflags[3] = 's'; | |
5330 | if (flags & MA_READ) | |
5331 | asciiflags[4] = 'r'; | |
5332 | if (flags & MA_WRITE) | |
5333 | asciiflags[5] = 'w'; | |
5334 | if (flags & MA_EXEC) | |
5335 | asciiflags[6] = 'x'; | |
5336 | return (asciiflags); | |
5337 | } | |
5338 | ||
77382aee PA |
5339 | /* Callback function, does the actual work for 'info proc |
5340 | mappings'. */ | |
831e682e | 5341 | |
831e682e | 5342 | static int |
b8edc417 | 5343 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5344 | void *unused) |
831e682e | 5345 | { |
0b62613e | 5346 | unsigned int pr_off; |
831e682e | 5347 | |
831e682e | 5348 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5349 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5350 | #else |
0b62613e | 5351 | pr_off = map->pr_off; |
831e682e | 5352 | #endif |
0b62613e | 5353 | |
a97b0ac8 | 5354 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5355 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5356 | (unsigned long) map->pr_vaddr, |
5357 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5358 | (unsigned long) map->pr_size, |
0b62613e PA |
5359 | pr_off, |
5360 | mappingflags (map->pr_mflags)); | |
5361 | else | |
f6a96b83 | 5362 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5363 | (unsigned long) map->pr_vaddr, |
5364 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5365 | (unsigned long) map->pr_size, |
0b62613e PA |
5366 | pr_off, |
5367 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5368 | |
5369 | return 0; | |
5370 | } | |
5371 | ||
77382aee | 5372 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5373 | |
5374 | static void | |
5375 | info_proc_mappings (procinfo *pi, int summary) | |
5376 | { | |
388faa48 | 5377 | if (summary) |
0df8b418 | 5378 | return; /* No output for summary mode. */ |
388faa48 | 5379 | |
a3f17187 | 5380 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5381 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5382 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5383 | "Start Addr", | |
5384 | " End Addr", | |
5385 | " Size", | |
5386 | " Offset", | |
5387 | "Flags"); | |
5388 | else | |
5389 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5390 | "Start Addr", | |
5391 | " End Addr", | |
5392 | " Size", | |
5393 | " Offset", | |
5394 | "Flags"); | |
388faa48 | 5395 | |
831e682e | 5396 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5397 | printf_filtered ("\n"); |
5398 | } | |
5399 | ||
77382aee | 5400 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5401 | |
5402 | static void | |
145b16a9 UW |
5403 | procfs_info_proc (struct target_ops *ops, char *args, |
5404 | enum info_proc_what what) | |
c906108c | 5405 | { |
c3f6f71d | 5406 | struct cleanup *old_chain; |
388faa48 MS |
5407 | procinfo *process = NULL; |
5408 | procinfo *thread = NULL; | |
5409 | char **argv = NULL; | |
5410 | char *tmp = NULL; | |
5411 | int pid = 0; | |
5412 | int tid = 0; | |
5413 | int mappings = 0; | |
c906108c | 5414 | |
145b16a9 UW |
5415 | switch (what) |
5416 | { | |
5417 | case IP_MINIMAL: | |
5418 | break; | |
5419 | ||
5420 | case IP_MAPPINGS: | |
5421 | case IP_ALL: | |
5422 | mappings = 1; | |
5423 | break; | |
5424 | ||
5425 | default: | |
5426 | error (_("Not supported on this target.")); | |
5427 | } | |
5428 | ||
c3f6f71d JM |
5429 | old_chain = make_cleanup (null_cleanup, 0); |
5430 | if (args) | |
0fda6bd2 | 5431 | { |
d1a41061 PP |
5432 | argv = gdb_buildargv (args); |
5433 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5434 | } |
c3f6f71d JM |
5435 | while (argv != NULL && *argv != NULL) |
5436 | { | |
5437 | if (isdigit (argv[0][0])) | |
5438 | { | |
5439 | pid = strtoul (argv[0], &tmp, 10); | |
5440 | if (*tmp == '/') | |
5441 | tid = strtoul (++tmp, NULL, 10); | |
5442 | } | |
5443 | else if (argv[0][0] == '/') | |
5444 | { | |
5445 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5446 | } | |
c3f6f71d JM |
5447 | argv++; |
5448 | } | |
5449 | if (pid == 0) | |
39f77062 | 5450 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5451 | if (pid == 0) |
8a3fe4f8 | 5452 | error (_("No current process: you must name one.")); |
c3f6f71d | 5453 | else |
c906108c | 5454 | { |
c3f6f71d | 5455 | /* Have pid, will travel. |
0df8b418 | 5456 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5457 | process = find_procinfo (pid, 0); |
5458 | if (process == NULL) | |
5459 | { | |
19958708 | 5460 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5461 | remember to close it again when finished. */ |
5462 | process = create_procinfo (pid, 0); | |
004527cb | 5463 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5464 | if (!open_procinfo_files (process, FD_CTL)) |
5465 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5466 | } | |
c906108c | 5467 | } |
c3f6f71d JM |
5468 | if (tid != 0) |
5469 | thread = create_procinfo (pid, tid); | |
5470 | ||
5471 | if (process) | |
5472 | { | |
a3f17187 | 5473 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5474 | proc_prettyprint_flags (proc_flags (process), 1); |
5475 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5476 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5477 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5478 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5479 | proc_get_nthreads (process)); |
5480 | } | |
5481 | if (thread) | |
5482 | { | |
a3f17187 | 5483 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5484 | proc_prettyprint_flags (proc_flags (thread), 1); |
5485 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5486 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5487 | } | |
5488 | ||
388faa48 MS |
5489 | if (mappings) |
5490 | { | |
5491 | info_proc_mappings (process, 0); | |
5492 | } | |
5493 | ||
c3f6f71d | 5494 | do_cleanups (old_chain); |
c906108c SS |
5495 | } |
5496 | ||
9185ddce JB |
5497 | /* Modify the status of the system call identified by SYSCALLNUM in |
5498 | the set of syscalls that are currently traced/debugged. | |
5499 | ||
5500 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5501 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5502 | |
0df8b418 | 5503 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5504 | will be disabled. */ |
5505 | ||
5506 | static void | |
5507 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5508 | int mode, int from_tty) |
9185ddce JB |
5509 | { |
5510 | sysset_t *sysset; | |
77382aee | 5511 | |
9185ddce JB |
5512 | if (entry_or_exit == PR_SYSENTRY) |
5513 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5514 | else | |
5515 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5516 | ||
5517 | if (sysset == NULL) | |
5518 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5519 | ||
5520 | if (mode == FLAG_SET) | |
5521 | gdb_praddsysset (sysset, syscallnum); | |
5522 | else | |
5523 | gdb_prdelsysset (sysset, syscallnum); | |
5524 | ||
5525 | if (entry_or_exit == PR_SYSENTRY) | |
5526 | { | |
5527 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5528 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5529 | } |
5530 | else | |
5531 | { | |
5532 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5533 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5534 | } |
5535 | } | |
5536 | ||
c3f6f71d | 5537 | static void |
fba45db2 | 5538 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5539 | { |
c3f6f71d | 5540 | procinfo *pi; |
c906108c | 5541 | |
39f77062 | 5542 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5543 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5544 | |
c3f6f71d | 5545 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5546 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5547 | |
39f77062 | 5548 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5549 | if (isdigit (args[0])) |
5550 | { | |
9185ddce | 5551 | const int syscallnum = atoi (args); |
c906108c | 5552 | |
9185ddce | 5553 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5554 | } |
5555 | } | |
5556 | ||
19958708 | 5557 | static void |
fba45db2 | 5558 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5559 | { |
c3f6f71d JM |
5560 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5561 | } | |
c906108c | 5562 | |
19958708 | 5563 | static void |
fba45db2 | 5564 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5565 | { |
5566 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5567 | } |
c906108c | 5568 | |
19958708 | 5569 | static void |
fba45db2 | 5570 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5571 | { |
5572 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5573 | } | |
5574 | ||
19958708 | 5575 | static void |
fba45db2 | 5576 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5577 | { |
c3f6f71d JM |
5578 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5579 | } | |
c906108c | 5580 | |
c906108c | 5581 | |
a0911fd0 MR |
5582 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5583 | extern void _initialize_procfs (void); | |
5584 | ||
c906108c | 5585 | void |
fba45db2 | 5586 | _initialize_procfs (void) |
c906108c | 5587 | { |
27087a3d JB |
5588 | observer_attach_inferior_created (procfs_inferior_created); |
5589 | ||
19958708 | 5590 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5591 | _("Give a trace of entries into the syscall.")); |
19958708 | 5592 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5593 | _("Give a trace of exits from the syscall.")); |
19958708 | 5594 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5595 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5596 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5597 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5598 | } |
5599 | ||
5600 | /* =================== END, GDB "MODULE" =================== */ | |
5601 | ||
5602 | ||
5603 | ||
77382aee PA |
5604 | /* miscellaneous stubs: */ |
5605 | ||
5606 | /* The following satisfy a few random symbols mostly created by the | |
5607 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5608 | |
77382aee PA |
5609 | /* Return a pid for which we guarantee we will be able to find a |
5610 | 'live' procinfo. */ | |
c3f6f71d | 5611 | |
39f77062 | 5612 | ptid_t |
fba45db2 | 5613 | procfs_first_available (void) |
c3f6f71d | 5614 | { |
39f77062 | 5615 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5616 | } |
be4d1333 MS |
5617 | |
5618 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5619 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5620 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5621 | |
5622 | static char * | |
19958708 | 5623 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
5624 | char *note_data, int *note_size, |
5625 | enum target_signal stop_signal) | |
be4d1333 | 5626 | { |
594f7785 | 5627 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5628 | gdb_gregset_t gregs; |
5629 | gdb_fpregset_t fpregs; | |
5630 | unsigned long merged_pid; | |
75125405 | 5631 | struct cleanup *old_chain; |
be4d1333 MS |
5632 | |
5633 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5634 | ||
75125405 DJ |
5635 | /* This part is the old method for fetching registers. |
5636 | It should be replaced by the newer one using regsets | |
5637 | once it is implemented in this platform: | |
0df8b418 | 5638 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5639 | |
5640 | old_chain = save_inferior_ptid (); | |
5641 | inferior_ptid = ptid; | |
5642 | target_fetch_registers (regcache, -1); | |
5643 | ||
594f7785 | 5644 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5645 | #if defined (NEW_PROC_API) |
65554fef MS |
5646 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5647 | note_data, | |
5648 | note_size, | |
19958708 | 5649 | merged_pid, |
65554fef MS |
5650 | stop_signal, |
5651 | &gregs); | |
5652 | #else | |
be4d1333 | 5653 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5654 | note_data, |
5655 | note_size, | |
19958708 | 5656 | merged_pid, |
be4d1333 | 5657 | stop_signal, |
65554fef MS |
5658 | &gregs); |
5659 | #endif | |
594f7785 | 5660 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5661 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5662 | note_data, | |
5663 | note_size, | |
5664 | &fpregs, | |
5665 | sizeof (fpregs)); | |
75125405 DJ |
5666 | |
5667 | do_cleanups (old_chain); | |
5668 | ||
be4d1333 MS |
5669 | return note_data; |
5670 | } | |
5671 | ||
5672 | struct procfs_corefile_thread_data { | |
5673 | bfd *obfd; | |
5674 | char *note_data; | |
5675 | int *note_size; | |
2020b7ab | 5676 | enum target_signal stop_signal; |
be4d1333 MS |
5677 | }; |
5678 | ||
5679 | static int | |
65554fef | 5680 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5681 | { |
5682 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5683 | |
2689673f | 5684 | if (pi != NULL) |
be4d1333 | 5685 | { |
75125405 | 5686 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
f4a14ae6 | 5687 | |
75125405 | 5688 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5689 | args->note_data, |
2020b7ab PA |
5690 | args->note_size, |
5691 | args->stop_signal); | |
be4d1333 MS |
5692 | } |
5693 | return 0; | |
5694 | } | |
5695 | ||
a223f1e7 JB |
5696 | static int |
5697 | find_signalled_thread (struct thread_info *info, void *data) | |
5698 | { | |
16c381f0 | 5699 | if (info->suspend.stop_signal != TARGET_SIGNAL_0 |
a223f1e7 JB |
5700 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5701 | return 1; | |
5702 | ||
5703 | return 0; | |
5704 | } | |
5705 | ||
5706 | static enum target_signal | |
5707 | find_stop_signal (void) | |
5708 | { | |
5709 | struct thread_info *info = | |
5710 | iterate_over_threads (find_signalled_thread, NULL); | |
5711 | ||
5712 | if (info) | |
16c381f0 | 5713 | return info->suspend.stop_signal; |
a223f1e7 JB |
5714 | else |
5715 | return TARGET_SIGNAL_0; | |
5716 | } | |
5717 | ||
be4d1333 MS |
5718 | static char * |
5719 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5720 | { | |
5721 | struct cleanup *old_chain; | |
5722 | gdb_gregset_t gregs; | |
5723 | gdb_fpregset_t fpregs; | |
5724 | char fname[16] = {'\0'}; | |
5725 | char psargs[80] = {'\0'}; | |
5726 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5727 | char *note_data = NULL; | |
6dbdc4a3 | 5728 | char *inf_args; |
be4d1333 | 5729 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5730 | gdb_byte *auxv; |
4e73f23d | 5731 | int auxv_len; |
651c8d2d | 5732 | enum target_signal stop_signal; |
be4d1333 MS |
5733 | |
5734 | if (get_exec_file (0)) | |
5735 | { | |
9f37bbcc | 5736 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5737 | fname[sizeof (fname) - 1] = 0; |
5738 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5739 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5740 | |
5741 | inf_args = get_inferior_args (); | |
5742 | if (inf_args && *inf_args && | |
5743 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5744 | { |
19958708 | 5745 | strncat (psargs, " ", |
be4d1333 | 5746 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5747 | strncat (psargs, inf_args, |
be4d1333 MS |
5748 | sizeof (psargs) - strlen (psargs)); |
5749 | } | |
5750 | } | |
5751 | ||
19958708 RM |
5752 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5753 | note_data, | |
5754 | note_size, | |
5755 | fname, | |
be4d1333 MS |
5756 | psargs); |
5757 | ||
651c8d2d PA |
5758 | stop_signal = find_stop_signal (); |
5759 | ||
8903eff6 | 5760 | #ifdef UNIXWARE |
594f7785 | 5761 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5762 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5763 | PIDGET (inferior_ptid), | |
65554fef MS |
5764 | stop_signal, &gregs); |
5765 | #endif | |
5766 | ||
be4d1333 MS |
5767 | thread_args.obfd = obfd; |
5768 | thread_args.note_data = note_data; | |
5769 | thread_args.note_size = note_size; | |
651c8d2d | 5770 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5771 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5772 | &thread_args); | |
65554fef | 5773 | |
2689673f PA |
5774 | /* There should be always at least one thread. */ |
5775 | gdb_assert (thread_args.note_data != note_data); | |
5776 | note_data = thread_args.note_data; | |
be4d1333 | 5777 | |
13547ab6 DJ |
5778 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5779 | NULL, &auxv); | |
4e73f23d RM |
5780 | if (auxv_len > 0) |
5781 | { | |
5782 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5783 | "CORE", NT_AUXV, auxv, auxv_len); | |
5784 | xfree (auxv); | |
5785 | } | |
5786 | ||
be4d1333 MS |
5787 | make_cleanup (xfree, note_data); |
5788 | return note_data; | |
5789 | } | |
65554fef MS |
5790 | #else /* !(Solaris or Unixware) */ |
5791 | static char * | |
5792 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5793 | { | |
8a3fe4f8 | 5794 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5795 | return NULL; /* lint */ |
5796 | } | |
5797 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5798 | /* =================== END GCORE .NOTE "MODULE" =================== */ |