Commit | Line | Data |
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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
4c38e0a4 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008, 2009, 2010 |
6aba47ca | 4 | Free Software Foundation, Inc. |
2555fe1a | 5 | |
c3f6f71d JM |
6 | Written by Michael Snyder at Cygnus Solutions. |
7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 8 | |
a9762ec7 JB |
9 | This file is part of GDB. |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 3 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 23 | |
c3f6f71d JM |
24 | #include "defs.h" |
25 | #include "inferior.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
c906108c | 33 | |
c3f6f71d JM |
34 | #if defined (NEW_PROC_API) |
35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
36 | #endif | |
c906108c | 37 | |
c3f6f71d | 38 | #include <sys/procfs.h> |
37de36c6 | 39 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 40 | #include <sys/fault.h> |
37de36c6 KB |
41 | #endif |
42 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 43 | #include <sys/syscall.h> |
37de36c6 | 44 | #endif |
c3f6f71d | 45 | #include <sys/errno.h> |
2555fe1a | 46 | #include "gdb_wait.h" |
0fda6bd2 JM |
47 | #include <signal.h> |
48 | #include <ctype.h> | |
19958708 | 49 | #include "gdb_string.h" |
df8f7274 | 50 | #include "gdb_assert.h" |
44270758 | 51 | #include "inflow.h" |
4e73f23d | 52 | #include "auxv.h" |
d1a7880c | 53 | #include "procfs.h" |
27087a3d | 54 | #include "observer.h" |
0fda6bd2 | 55 | |
77382aee PA |
56 | /* This module provides the interface between GDB and the |
57 | /proc file system, which is used on many versions of Unix | |
58 | as a means for debuggers to control other processes. | |
59 | ||
60 | Examples of the systems that use this interface are: | |
61 | ||
62 | Irix | |
63 | Solaris | |
64 | OSF | |
65 | Unixware | |
66 | AIX5 | |
67 | ||
68 | /proc works by imitating a file system: you open a simulated file | |
69 | that represents the process you wish to interact with, and perform | |
70 | operations on that "file" in order to examine or change the state | |
71 | of the other process. | |
72 | ||
73 | The most important thing to know about /proc and this module is | |
74 | that there are two very different interfaces to /proc: | |
75 | ||
76 | One that uses the ioctl system call, and another that uses read | |
77 | and write system calls. | |
78 | ||
79 | This module has to support both /proc interfaces. This means that | |
80 | there are two different ways of doing every basic operation. | |
81 | ||
82 | In order to keep most of the code simple and clean, I have defined | |
83 | an interface "layer" which hides all these system calls. An ifdef | |
84 | (NEW_PROC_API) determines which interface we are using, and most or | |
85 | all occurrances of this ifdef should be confined to this interface | |
86 | layer. */ | |
87 | ||
88 | /* Determine which /proc API we are using: The ioctl API defines | |
89 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 90 | |
c3f6f71d | 91 | #ifdef NEW_PROC_API |
c906108c | 92 | #include <sys/types.h> |
4b14d3e4 | 93 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 94 | #endif |
c906108c | 95 | |
c3f6f71d JM |
96 | #include <fcntl.h> /* for O_RDONLY */ |
97 | #include <unistd.h> /* for "X_OK" */ | |
98 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 99 | |
103b3ef5 MS |
100 | /* Note: procfs-utils.h must be included after the above system header |
101 | files, because it redefines various system calls using macros. | |
102 | This may be incompatible with the prototype declarations. */ | |
103 | ||
103b3ef5 MS |
104 | #include "proc-utils.h" |
105 | ||
77382aee | 106 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
107 | #include "gregset.h" |
108 | ||
c3f6f71d | 109 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 110 | |
77382aee | 111 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 112 | |
136d6dae VP |
113 | static void procfs_attach (struct target_ops *, char *, int); |
114 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e PA |
115 | static void procfs_resume (struct target_ops *, |
116 | ptid_t, int, enum target_signal); | |
f9c72d52 | 117 | static void procfs_stop (ptid_t); |
a14ed312 | 118 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
119 | static void procfs_fetch_registers (struct target_ops *, |
120 | struct regcache *, int); | |
121 | static void procfs_store_registers (struct target_ops *, | |
122 | struct regcache *, int); | |
39f77062 | 123 | static void procfs_notice_signals (ptid_t); |
7d85a9c0 | 124 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 125 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 126 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 127 | char *, char **, int); |
117de6a9 | 128 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 129 | ptid_t, struct target_waitstatus *, int); |
0b62613e | 130 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
131 | struct mem_attrib *attrib, |
132 | struct target_ops *); | |
4e73f23d RM |
133 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
134 | enum target_object object, | |
135 | const char *annex, | |
0b62613e | 136 | gdb_byte *readbuf, 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 | ||
c47ffbe3 | 154 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
155 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
156 | is presented in 64-bit format. We need to provide a custom parser | |
157 | to handle that. */ | |
c47ffbe3 VP |
158 | static int |
159 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 160 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 161 | { |
e17a4113 | 162 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); |
c47ffbe3 VP |
163 | gdb_byte *ptr = *readptr; |
164 | ||
165 | if (endptr == ptr) | |
166 | return 0; | |
77382aee | 167 | |
c47ffbe3 VP |
168 | if (endptr - ptr < 8 * 2) |
169 | return -1; | |
170 | ||
e17a4113 | 171 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
172 | ptr += 8; |
173 | /* The size of data is always 64-bit. If the application is 32-bit, | |
174 | it will be zero extended, as expected. */ | |
e17a4113 | 175 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
176 | ptr += 8; |
177 | ||
178 | *readptr = ptr; | |
179 | return 1; | |
180 | } | |
181 | #endif | |
182 | ||
d1a7880c | 183 | struct target_ops * |
28439f5e | 184 | procfs_target (void) |
c3f6f71d | 185 | { |
28439f5e PA |
186 | struct target_ops *t = inf_child_target (); |
187 | ||
77382aee PA |
188 | t->to_shortname = "procfs"; |
189 | t->to_longname = "Unix /proc child process"; | |
190 | t->to_doc = | |
c3f6f71d | 191 | "Unix /proc child process (started by the \"run\" command)."; |
77382aee PA |
192 | t->to_create_inferior = procfs_create_inferior; |
193 | t->to_kill = procfs_kill_inferior; | |
194 | t->to_mourn_inferior = procfs_mourn_inferior; | |
195 | t->to_attach = procfs_attach; | |
196 | t->to_detach = procfs_detach; | |
197 | t->to_wait = procfs_wait; | |
198 | t->to_resume = procfs_resume; | |
199 | t->to_fetch_registers = procfs_fetch_registers; | |
200 | t->to_store_registers = procfs_store_registers; | |
201 | t->to_xfer_partial = procfs_xfer_partial; | |
28439f5e | 202 | t->deprecated_xfer_memory = procfs_xfer_memory; |
77382aee PA |
203 | t->to_notice_signals = procfs_notice_signals; |
204 | t->to_files_info = procfs_files_info; | |
205 | t->to_stop = procfs_stop; | |
28439f5e | 206 | |
77382aee PA |
207 | t->to_find_new_threads = procfs_find_new_threads; |
208 | t->to_thread_alive = procfs_thread_alive; | |
209 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 210 | |
77382aee | 211 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
212 | t->to_find_memory_regions = proc_find_memory_regions; |
213 | t->to_make_corefile_notes = procfs_make_note_section; | |
c47ffbe3 VP |
214 | |
215 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 216 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
217 | #endif |
218 | ||
77382aee | 219 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
220 | |
221 | return t; | |
c3f6f71d | 222 | } |
c906108c | 223 | |
c3f6f71d JM |
224 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
225 | ||
77382aee PA |
226 | /* World Unification: |
227 | ||
228 | Put any typedefs, defines etc. here that are required for the | |
229 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
230 | |
231 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 232 | #ifdef WA_READ |
19958708 | 233 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
234 | WRITE_WATCHFLAG = WA_WRITE, |
235 | EXEC_WATCHFLAG = WA_EXEC, | |
236 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
237 | }; | |
238 | #endif | |
239 | #else /* Irix method for watchpoints */ | |
19958708 | 240 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
241 | WRITE_WATCHFLAG = MA_WRITE, |
242 | EXEC_WATCHFLAG = MA_EXEC, | |
243 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
244 | }; | |
245 | #endif | |
246 | ||
37de36c6 KB |
247 | /* gdb_sigset_t */ |
248 | #ifdef HAVE_PR_SIGSET_T | |
249 | typedef pr_sigset_t gdb_sigset_t; | |
250 | #else | |
251 | typedef sigset_t gdb_sigset_t; | |
252 | #endif | |
253 | ||
254 | /* sigaction */ | |
255 | #ifdef HAVE_PR_SIGACTION64_T | |
256 | typedef pr_sigaction64_t gdb_sigaction_t; | |
257 | #else | |
258 | typedef struct sigaction gdb_sigaction_t; | |
259 | #endif | |
260 | ||
261 | /* siginfo */ | |
262 | #ifdef HAVE_PR_SIGINFO64_T | |
263 | typedef pr_siginfo64_t gdb_siginfo_t; | |
264 | #else | |
265 | typedef struct siginfo gdb_siginfo_t; | |
266 | #endif | |
267 | ||
3c95f01c JB |
268 | /* On mips-irix, praddset and prdelset are defined in such a way that |
269 | they return a value, which causes GCC to emit a -Wunused error | |
270 | because the returned value is not used. Prevent this warning | |
271 | by casting the return value to void. On sparc-solaris, this issue | |
272 | does not exist because the definition of these macros already include | |
273 | that cast to void. */ | |
274 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
275 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
276 | ||
37de36c6 KB |
277 | /* gdb_premptysysset */ |
278 | #ifdef premptysysset | |
279 | #define gdb_premptysysset premptysysset | |
280 | #else | |
281 | #define gdb_premptysysset premptyset | |
282 | #endif | |
283 | ||
284 | /* praddsysset */ | |
285 | #ifdef praddsysset | |
286 | #define gdb_praddsysset praddsysset | |
287 | #else | |
3c95f01c | 288 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
289 | #endif |
290 | ||
291 | /* prdelsysset */ | |
292 | #ifdef prdelsysset | |
293 | #define gdb_prdelsysset prdelsysset | |
294 | #else | |
3c95f01c | 295 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
296 | #endif |
297 | ||
298 | /* prissyssetmember */ | |
299 | #ifdef prissyssetmember | |
300 | #define gdb_pr_issyssetmember prissyssetmember | |
301 | #else | |
302 | #define gdb_pr_issyssetmember prismember | |
303 | #endif | |
304 | ||
305 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
306 | as intuitively descriptive as it could be, so we'll define | |
307 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
308 | this writing, this feature is only found on AIX5 systems and | |
309 | basically means that the set of syscalls is not fixed. I.e, | |
310 | there's no nice table that one can #include to get all of the | |
311 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
312 | for each process. We are at least guaranteed that they won't | |
313 | change over the lifetime of the process. But each process could | |
77382aee | 314 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
315 | #ifdef HAVE_PRSYSENT_T |
316 | #define DYNAMIC_SYSCALLS | |
317 | #endif | |
c3f6f71d JM |
318 | |
319 | ||
320 | ||
321 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
322 | ||
323 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
324 | ||
325 | /* The procinfo struct is a wrapper to hold all the state information | |
326 | concerning a /proc process. There should be exactly one procinfo | |
327 | for each process, and since GDB currently can debug only one | |
328 | process at a time, that means there should be only one procinfo. | |
329 | All of the LWP's of a process can be accessed indirectly thru the | |
330 | single process procinfo. | |
331 | ||
332 | However, against the day when GDB may debug more than one process, | |
333 | this data structure is kept in a list (which for now will hold no | |
334 | more than one member), and many functions will have a pointer to a | |
335 | procinfo as an argument. | |
336 | ||
337 | There will be a separate procinfo structure for use by the (not yet | |
338 | implemented) "info proc" command, so that we can print useful | |
339 | information about any random process without interfering with the | |
340 | inferior's procinfo information. */ | |
341 | ||
342 | #ifdef NEW_PROC_API | |
343 | /* format strings for /proc paths */ | |
344 | # ifndef CTL_PROC_NAME_FMT | |
345 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
346 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
347 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
348 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
349 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
350 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
351 | # endif | |
352 | /* the name of the proc status struct depends on the implementation */ | |
353 | typedef pstatus_t gdb_prstatus_t; | |
354 | typedef lwpstatus_t gdb_lwpstatus_t; | |
355 | #else /* ! NEW_PROC_API */ | |
356 | /* format strings for /proc paths */ | |
357 | # ifndef CTL_PROC_NAME_FMT | |
358 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
359 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
360 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
361 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
362 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
363 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
364 | # endif | |
c906108c | 365 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 366 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
367 | typedef prstatus_t gdb_lwpstatus_t; |
368 | #endif /* NEW_PROC_API */ | |
c906108c | 369 | |
c3f6f71d JM |
370 | typedef struct procinfo { |
371 | struct procinfo *next; | |
372 | int pid; /* Process ID */ | |
373 | int tid; /* Thread/LWP id */ | |
c906108c | 374 | |
c3f6f71d JM |
375 | /* process state */ |
376 | int was_stopped; | |
377 | int ignore_next_sigstop; | |
c906108c | 378 | |
19958708 | 379 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
380 | several different fd's, depending on the version of /proc |
381 | (old ioctl or new read/write). */ | |
c906108c | 382 | |
c3f6f71d | 383 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
384 | |
385 | /* The next three file descriptors are actually only needed in the | |
386 | read/write, multiple-file-descriptor implemenation | |
387 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
388 | code, we will use them uniformly by (in the case of the ioctl | |
389 | single-file-descriptor implementation) filling them with copies | |
390 | of the control fd. */ | |
c3f6f71d JM |
391 | int status_fd; /* File descriptor for /proc status file */ |
392 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 393 | |
c3f6f71d | 394 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 395 | |
c3f6f71d | 396 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
397 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
398 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
399 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
400 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 401 | |
c3f6f71d | 402 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 403 | |
c3f6f71d JM |
404 | #ifndef NEW_PROC_API |
405 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 406 | #endif |
37de36c6 KB |
407 | |
408 | #ifdef DYNAMIC_SYSCALLS | |
409 | int num_syscalls; /* Total number of syscalls */ | |
410 | char **syscall_names; /* Syscall number to name map */ | |
411 | #endif | |
19958708 | 412 | |
c3f6f71d | 413 | struct procinfo *thread_list; |
c906108c | 414 | |
c3f6f71d JM |
415 | int status_valid : 1; |
416 | int gregs_valid : 1; | |
417 | int fpregs_valid : 1; | |
418 | int threads_valid: 1; | |
419 | } procinfo; | |
c906108c | 420 | |
c3f6f71d | 421 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 422 | |
c3f6f71d | 423 | /* Function prototypes for procinfo module: */ |
c906108c | 424 | |
a14ed312 KB |
425 | static procinfo *find_procinfo_or_die (int pid, int tid); |
426 | static procinfo *find_procinfo (int pid, int tid); | |
427 | static procinfo *create_procinfo (int pid, int tid); | |
428 | static void destroy_procinfo (procinfo * p); | |
004527cb | 429 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
430 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
431 | static int open_procinfo_files (procinfo * p, int which); | |
432 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
433 | static int sysset_t_size (procinfo *p); |
434 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
435 | #ifdef DYNAMIC_SYSCALLS | |
436 | static void load_syscalls (procinfo *pi); | |
437 | static void free_syscalls (procinfo *pi); | |
438 | static int find_syscall (procinfo *pi, char *name); | |
439 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 440 | |
e9ef4f39 | 441 | static int iterate_over_mappings |
b8edc417 JK |
442 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
443 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 444 | void *data)); |
e9ef4f39 | 445 | |
c3f6f71d JM |
446 | /* The head of the procinfo list: */ |
447 | static procinfo * procinfo_list; | |
c906108c | 448 | |
77382aee PA |
449 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
450 | not found. */ | |
c906108c | 451 | |
19958708 | 452 | static procinfo * |
fba45db2 | 453 | find_procinfo (int pid, int tid) |
c5aa993b | 454 | { |
c3f6f71d | 455 | procinfo *pi; |
c906108c | 456 | |
c3f6f71d JM |
457 | for (pi = procinfo_list; pi; pi = pi->next) |
458 | if (pi->pid == pid) | |
459 | break; | |
c906108c | 460 | |
c3f6f71d JM |
461 | if (pi) |
462 | if (tid) | |
463 | { | |
464 | /* Don't check threads_valid. If we're updating the | |
465 | thread_list, we want to find whatever threads are already | |
466 | here. This means that in general it is the caller's | |
467 | responsibility to check threads_valid and update before | |
468 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 469 | thread. */ |
c3f6f71d JM |
470 | |
471 | for (pi = pi->thread_list; pi; pi = pi->next) | |
472 | if (pi->tid == tid) | |
473 | break; | |
474 | } | |
c906108c | 475 | |
c3f6f71d JM |
476 | return pi; |
477 | } | |
c906108c | 478 | |
77382aee | 479 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 480 | |
c3f6f71d | 481 | static procinfo * |
fba45db2 | 482 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
483 | { |
484 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 485 | |
c3f6f71d | 486 | if (pi == NULL) |
0fda6bd2 JM |
487 | { |
488 | if (tid) | |
77382aee PA |
489 | error (_("\ |
490 | procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
491 | pid, tid); |
492 | else | |
8a3fe4f8 | 493 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 494 | } |
c3f6f71d JM |
495 | return pi; |
496 | } | |
c906108c | 497 | |
77382aee PA |
498 | /* Wrapper for `open'. The appropriate open call is attempted; if |
499 | unsuccessful, it will be retried as many times as needed for the | |
500 | EAGAIN and EINTR conditions. | |
19958708 | 501 | |
77382aee PA |
502 | For other conditions, retry the open a limited number of times. In |
503 | addition, a short sleep is imposed prior to retrying the open. The | |
504 | reason for this sleep is to give the kernel a chance to catch up | |
505 | and create the file in question in the event that GDB "wins" the | |
506 | race to open a file before the kernel has created it. */ | |
19958708 | 507 | |
4d1bcd09 KB |
508 | static int |
509 | open_with_retry (const char *pathname, int flags) | |
510 | { | |
511 | int retries_remaining, status; | |
512 | ||
513 | retries_remaining = 2; | |
514 | ||
515 | while (1) | |
516 | { | |
517 | status = open (pathname, flags); | |
518 | ||
519 | if (status >= 0 || retries_remaining == 0) | |
520 | break; | |
521 | else if (errno != EINTR && errno != EAGAIN) | |
522 | { | |
523 | retries_remaining--; | |
524 | sleep (1); | |
525 | } | |
526 | } | |
527 | ||
528 | return status; | |
529 | } | |
530 | ||
77382aee PA |
531 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
532 | is defined, we only open the control file descriptor; the others | |
533 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
534 | there is only one real file descriptor, but we keep multiple copies | |
535 | of it so that the code that uses them does not have to be #ifdef'd. | |
536 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 537 | |
c3f6f71d | 538 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 539 | |
c3f6f71d | 540 | static int |
fba45db2 | 541 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 542 | { |
0fda6bd2 | 543 | #ifdef NEW_PROC_API |
c3f6f71d | 544 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 545 | #endif |
c3f6f71d JM |
546 | int fd; |
547 | ||
77382aee PA |
548 | /* This function is getting ALMOST long enough to break up into |
549 | several. Here is some rationale: | |
550 | ||
551 | NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
552 | There are several file descriptors that may need to be open | |
553 | for any given process or LWP. The ones we're intereted in are: | |
554 | - control (ctl) write-only change the state | |
555 | - status (status) read-only query the state | |
556 | - address space (as) read/write access memory | |
557 | - map (map) read-only virtual addr map | |
558 | Most of these are opened lazily as they are needed. | |
559 | The pathnames for the 'files' for an LWP look slightly | |
560 | different from those of a first-class process: | |
561 | Pathnames for a process (<proc-id>): | |
562 | /proc/<proc-id>/ctl | |
563 | /proc/<proc-id>/status | |
564 | /proc/<proc-id>/as | |
565 | /proc/<proc-id>/map | |
566 | Pathnames for an LWP (lwp-id): | |
567 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
568 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
569 | An LWP has no map or address space file descriptor, since | |
570 | the memory map and address space are shared by all LWPs. | |
571 | ||
572 | Everyone else (Solaris 2.5, Irix, OSF) | |
573 | There is only one file descriptor for each process or LWP. | |
574 | For convenience, we copy the same file descriptor into all | |
575 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
576 | as_fd, see NEW_PROC_API above) so that code that uses them | |
577 | doesn't need any #ifdef's. | |
578 | Pathname for all: | |
579 | /proc/<proc-id> | |
580 | ||
581 | Solaris 2.5 LWP's: | |
582 | Each LWP has an independent file descriptor, but these | |
583 | are not obtained via the 'open' system call like the rest: | |
584 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
585 | to the file descriptor of the parent process. | |
586 | ||
587 | OSF threads: | |
588 | These do not even have their own independent file descriptor. | |
589 | All operations are carried out on the file descriptor of the | |
590 | parent process. Therefore we just call open again for each | |
591 | thread, getting a new handle for the same 'file'. | |
c3f6f71d JM |
592 | */ |
593 | ||
594 | #ifdef NEW_PROC_API | |
77382aee PA |
595 | /* In this case, there are several different file descriptors that |
596 | we might be asked to open. The control file descriptor will be | |
597 | opened early, but the others will be opened lazily as they are | |
598 | needed. */ | |
c3f6f71d JM |
599 | |
600 | strcpy (tmp, pi->pathname); | |
601 | switch (which) { /* which file descriptor to open? */ | |
602 | case FD_CTL: | |
603 | if (pi->tid) | |
604 | strcat (tmp, "/lwpctl"); | |
605 | else | |
606 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 607 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
608 | if (fd <= 0) |
609 | return 0; /* fail */ | |
610 | pi->ctl_fd = fd; | |
611 | break; | |
612 | case FD_AS: | |
613 | if (pi->tid) | |
614 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
615 | strcat (tmp, "/as"); | |
4d1bcd09 | 616 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
617 | if (fd <= 0) |
618 | return 0; /* fail */ | |
619 | pi->as_fd = fd; | |
620 | break; | |
621 | case FD_STATUS: | |
622 | if (pi->tid) | |
623 | strcat (tmp, "/lwpstatus"); | |
624 | else | |
625 | strcat (tmp, "/status"); | |
4d1bcd09 | 626 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
627 | if (fd <= 0) |
628 | return 0; /* fail */ | |
629 | pi->status_fd = fd; | |
630 | break; | |
631 | default: | |
632 | return 0; /* unknown file descriptor */ | |
633 | } | |
634 | #else /* not NEW_PROC_API */ | |
77382aee PA |
635 | /* In this case, there is only one file descriptor for each procinfo |
636 | (ie. each process or LWP). In fact, only the file descriptor for | |
637 | the process can actually be opened by an 'open' system call. The | |
638 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
639 | process's file descriptor. | |
640 | ||
641 | For convenience, we copy each procinfo's single file descriptor | |
642 | into all of the fields occupied by the several file descriptors | |
643 | of the NEW_PROC_API implementation. That way, the code that uses | |
644 | them can be written without ifdefs. */ | |
c3f6f71d JM |
645 | |
646 | ||
647 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
648 | /* Only one FD; just open it. */ |
649 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
650 | return 0; |
651 | #else /* Sol 2.5, Irix, other? */ | |
652 | if (pi->tid == 0) /* Master procinfo for the process */ | |
653 | { | |
4d1bcd09 | 654 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
655 | if (fd <= 0) |
656 | return 0; /* fail */ | |
657 | } | |
658 | else /* LWP thread procinfo */ | |
659 | { | |
660 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
661 | procinfo *process; | |
662 | int lwpid = pi->tid; | |
663 | ||
664 | /* Find the procinfo for the entire process. */ | |
665 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
666 | return 0; /* fail */ | |
667 | ||
668 | /* Now obtain the file descriptor for the LWP. */ | |
669 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
670 | return 0; /* fail */ | |
671 | #else /* Irix, other? */ | |
672 | return 0; /* Don't know how to open threads */ | |
673 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
674 | } | |
675 | #endif /* OSF PIOCTSTATUS */ | |
676 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
677 | #endif /* NEW_PROC_API */ | |
c906108c | 678 | |
c3f6f71d JM |
679 | return 1; /* success */ |
680 | } | |
c906108c | 681 | |
77382aee PA |
682 | /* Allocate a data structure and link it into the procinfo list. |
683 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
684 | pointer to new procinfo struct. */ | |
c906108c | 685 | |
c3f6f71d | 686 | static procinfo * |
fba45db2 | 687 | create_procinfo (int pid, int tid) |
c3f6f71d | 688 | { |
0b62613e | 689 | procinfo *pi, *parent = NULL; |
c906108c | 690 | |
0d06e24b | 691 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 692 | return pi; /* Already exists, nothing to do. */ |
c906108c | 693 | |
c3f6f71d JM |
694 | /* find parent before doing malloc, to save having to cleanup */ |
695 | if (tid != 0) | |
696 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
697 | create it if it | |
698 | doesn't exist yet? */ | |
c906108c | 699 | |
c3f6f71d JM |
700 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
701 | memset (pi, 0, sizeof (procinfo)); | |
702 | pi->pid = pid; | |
703 | pi->tid = tid; | |
c906108c | 704 | |
37de36c6 KB |
705 | #ifdef DYNAMIC_SYSCALLS |
706 | load_syscalls (pi); | |
707 | #endif | |
708 | ||
1d5e0602 KB |
709 | pi->saved_entryset = sysset_t_alloc (pi); |
710 | pi->saved_exitset = sysset_t_alloc (pi); | |
711 | ||
c3f6f71d JM |
712 | /* Chain into list. */ |
713 | if (tid == 0) | |
714 | { | |
715 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
716 | pi->next = procinfo_list; | |
717 | procinfo_list = pi; | |
718 | } | |
719 | else | |
720 | { | |
721 | #ifdef NEW_PROC_API | |
722 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
723 | #else | |
724 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
725 | #endif | |
726 | pi->next = parent->thread_list; | |
727 | parent->thread_list = pi; | |
728 | } | |
729 | return pi; | |
730 | } | |
c906108c | 731 | |
77382aee | 732 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 733 | |
c3f6f71d | 734 | static void |
fba45db2 | 735 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
736 | { |
737 | if (pi->ctl_fd > 0) | |
738 | close (pi->ctl_fd); | |
739 | #ifdef NEW_PROC_API | |
740 | if (pi->as_fd > 0) | |
741 | close (pi->as_fd); | |
742 | if (pi->status_fd > 0) | |
743 | close (pi->status_fd); | |
744 | #endif | |
745 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
746 | } | |
c906108c | 747 | |
77382aee | 748 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 749 | |
c3f6f71d | 750 | static void |
fba45db2 | 751 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
752 | { |
753 | procinfo *ptr; | |
754 | ||
77382aee | 755 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
756 | if (pi == *list) |
757 | *list = pi->next; | |
19958708 | 758 | else |
c3f6f71d JM |
759 | for (ptr = *list; ptr; ptr = ptr->next) |
760 | if (ptr->next == pi) | |
761 | { | |
762 | ptr->next = pi->next; | |
763 | break; | |
764 | } | |
7a292a7a | 765 | |
77382aee | 766 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 767 | close_procinfo_files (pi); |
7a292a7a | 768 | |
77382aee | 769 | /* Step three: free the memory. */ |
37de36c6 KB |
770 | #ifdef DYNAMIC_SYSCALLS |
771 | free_syscalls (pi); | |
772 | #endif | |
1d5e0602 KB |
773 | xfree (pi->saved_entryset); |
774 | xfree (pi->saved_exitset); | |
b8c9b27d | 775 | xfree (pi); |
c3f6f71d | 776 | } |
c906108c | 777 | |
c3f6f71d | 778 | static void |
fba45db2 | 779 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
780 | { |
781 | procinfo *tmp; | |
c906108c | 782 | |
c3f6f71d JM |
783 | if (pi->tid != 0) /* destroy a thread procinfo */ |
784 | { | |
785 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
786 | destroy_one_procinfo (&tmp->thread_list, pi); | |
787 | } | |
788 | else /* destroy a process procinfo and all its threads */ | |
789 | { | |
790 | /* First destroy the children, if any; */ | |
791 | while (pi->thread_list != NULL) | |
792 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
793 | /* Then destroy the parent. Genocide!!! */ | |
794 | destroy_one_procinfo (&procinfo_list, pi); | |
795 | } | |
796 | } | |
c906108c | 797 | |
004527cb AC |
798 | static void |
799 | do_destroy_procinfo_cleanup (void *pi) | |
800 | { | |
801 | destroy_procinfo (pi); | |
802 | } | |
803 | ||
c3f6f71d | 804 | enum { NOKILL, KILL }; |
c906108c | 805 | |
77382aee PA |
806 | /* To be called on a non_recoverable error for a procinfo. Prints |
807 | error messages, optionally sends a SIGKILL to the process, then | |
808 | destroys the data structure. */ | |
c906108c | 809 | |
c3f6f71d | 810 | static void |
fba45db2 | 811 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
812 | { |
813 | char procfile[80]; | |
c906108c | 814 | |
c3f6f71d JM |
815 | if (pi->pathname) |
816 | { | |
817 | print_sys_errmsg (pi->pathname, errno); | |
818 | } | |
819 | else | |
820 | { | |
821 | sprintf (procfile, "process %d", pi->pid); | |
822 | print_sys_errmsg (procfile, errno); | |
823 | } | |
824 | if (kill_p == KILL) | |
825 | kill (pi->pid, SIGKILL); | |
c906108c | 826 | |
c3f6f71d | 827 | destroy_procinfo (pi); |
0b62613e | 828 | error ("%s", msg); |
c3f6f71d | 829 | } |
c906108c | 830 | |
77382aee PA |
831 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
832 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
833 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
834 | |
835 | static int | |
836 | sysset_t_size (procinfo * pi) | |
837 | { | |
838 | #ifndef DYNAMIC_SYSCALLS | |
839 | return sizeof (sysset_t); | |
840 | #else | |
841 | return sizeof (sysset_t) - sizeof (uint64_t) | |
842 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
843 | / (8 * sizeof (uint64_t))); | |
844 | #endif | |
845 | } | |
846 | ||
77382aee | 847 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
848 | |
849 | static sysset_t * | |
850 | sysset_t_alloc (procinfo * pi) | |
851 | { | |
852 | sysset_t *ret; | |
853 | int size = sysset_t_size (pi); | |
f4a14ae6 | 854 | |
37de36c6 KB |
855 | ret = xmalloc (size); |
856 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
857 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
858 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
859 | #endif |
860 | return ret; | |
861 | } | |
862 | ||
863 | #ifdef DYNAMIC_SYSCALLS | |
864 | ||
77382aee | 865 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
866 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
867 | with the names. (Certain numbers may be skipped in which case the | |
868 | names for these numbers will be left as NULL.) */ | |
869 | ||
870 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
871 | #define MAX_SYSCALLS 65536 | |
872 | ||
873 | static void | |
874 | load_syscalls (procinfo *pi) | |
875 | { | |
876 | char pathname[MAX_PROC_NAME_SIZE]; | |
877 | int sysent_fd; | |
878 | prsysent_t header; | |
879 | prsyscall_t *syscalls; | |
880 | int i, size, maxcall; | |
881 | ||
882 | pi->num_syscalls = 0; | |
883 | pi->syscall_names = 0; | |
884 | ||
77382aee | 885 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 886 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 887 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
888 | if (sysent_fd < 0) |
889 | { | |
8a3fe4f8 | 890 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
891 | } |
892 | ||
893 | size = sizeof header - sizeof (prsyscall_t); | |
894 | if (read (sysent_fd, &header, size) != size) | |
895 | { | |
8a3fe4f8 | 896 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
897 | } |
898 | ||
899 | if (header.pr_nsyscalls == 0) | |
900 | { | |
77382aee PA |
901 | error (_("\ |
902 | load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); | |
37de36c6 KB |
903 | } |
904 | ||
905 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
906 | syscalls = xmalloc (size); | |
907 | ||
908 | if (read (sysent_fd, syscalls, size) != size) | |
909 | { | |
910 | xfree (syscalls); | |
8a3fe4f8 | 911 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
912 | } |
913 | ||
914 | /* Find maximum syscall number. This may not be the same as | |
915 | pr_nsyscalls since that value refers to the number of entries | |
916 | in the table. (Also, the docs indicate that some system | |
917 | call numbers may be skipped.) */ | |
918 | ||
919 | maxcall = syscalls[0].pr_number; | |
920 | ||
921 | for (i = 1; i < header.pr_nsyscalls; i++) | |
922 | if (syscalls[i].pr_number > maxcall | |
77382aee | 923 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
924 | && syscalls[i].pr_number < MAX_SYSCALLS) |
925 | maxcall = syscalls[i].pr_number; | |
926 | ||
927 | pi->num_syscalls = maxcall+1; | |
928 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
929 | ||
930 | for (i = 0; i < pi->num_syscalls; i++) | |
931 | pi->syscall_names[i] = NULL; | |
932 | ||
77382aee | 933 | /* Read the syscall names in. */ |
37de36c6 KB |
934 | for (i = 0; i < header.pr_nsyscalls; i++) |
935 | { | |
936 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
937 | int nread; | |
938 | int callnum; | |
939 | ||
940 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 941 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
942 | || syscalls[i].pr_nameoff <= 0 |
943 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 944 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
945 | continue; |
946 | ||
947 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
948 | if (nread <= 0) | |
949 | continue; | |
950 | ||
951 | callnum = syscalls[i].pr_number; | |
952 | ||
953 | if (pi->syscall_names[callnum] != NULL) | |
954 | { | |
955 | /* FIXME: Generate warning */ | |
956 | continue; | |
957 | } | |
958 | ||
959 | namebuf[nread-1] = '\0'; | |
960 | size = strlen (namebuf) + 1; | |
961 | pi->syscall_names[callnum] = xmalloc (size); | |
962 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
963 | pi->syscall_names[callnum][size-1] = '\0'; | |
964 | } | |
19958708 | 965 | |
37de36c6 KB |
966 | close (sysent_fd); |
967 | xfree (syscalls); | |
968 | } | |
969 | ||
77382aee | 970 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
971 | structure. */ |
972 | ||
973 | static void | |
974 | free_syscalls (procinfo *pi) | |
975 | { | |
976 | if (pi->syscall_names) | |
977 | { | |
978 | int i; | |
979 | ||
980 | for (i = 0; i < pi->num_syscalls; i++) | |
981 | if (pi->syscall_names[i] != NULL) | |
982 | xfree (pi->syscall_names[i]); | |
983 | ||
984 | xfree (pi->syscall_names); | |
985 | pi->syscall_names = 0; | |
986 | } | |
987 | } | |
988 | ||
77382aee | 989 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 990 | If no match is found, return -1. */ |
19958708 | 991 | |
37de36c6 KB |
992 | static int |
993 | find_syscall (procinfo *pi, char *name) | |
994 | { | |
995 | int i; | |
f4a14ae6 | 996 | |
37de36c6 KB |
997 | for (i = 0; i < pi->num_syscalls; i++) |
998 | { | |
999 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1000 | return i; | |
1001 | } | |
1002 | return -1; | |
1003 | } | |
1004 | #endif | |
1005 | ||
c3f6f71d | 1006 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1007 | |
c3f6f71d | 1008 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1009 | |
77382aee PA |
1010 | /* This "module" is the interface layer between the /proc system API |
1011 | and the gdb target vector functions. This layer consists of access | |
1012 | functions that encapsulate each of the basic operations that we | |
1013 | need to use from the /proc API. | |
1014 | ||
1015 | The main motivation for this layer is to hide the fact that there | |
1016 | are two very different implementations of the /proc API. Rather | |
1017 | than have a bunch of #ifdefs all thru the gdb target vector | |
1018 | functions, we do our best to hide them all in here. */ | |
c906108c | 1019 | |
a14ed312 KB |
1020 | int proc_get_status (procinfo * pi); |
1021 | long proc_flags (procinfo * pi); | |
1022 | int proc_why (procinfo * pi); | |
1023 | int proc_what (procinfo * pi); | |
1024 | int proc_set_run_on_last_close (procinfo * pi); | |
1025 | int proc_unset_run_on_last_close (procinfo * pi); | |
1026 | int proc_set_inherit_on_fork (procinfo * pi); | |
1027 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1028 | int proc_set_async (procinfo * pi); | |
1029 | int proc_unset_async (procinfo * pi); | |
1030 | int proc_stop_process (procinfo * pi); | |
1031 | int proc_trace_signal (procinfo * pi, int signo); | |
1032 | int proc_ignore_signal (procinfo * pi, int signo); | |
1033 | int proc_clear_current_fault (procinfo * pi); | |
1034 | int proc_set_current_signal (procinfo * pi, int signo); | |
1035 | int proc_clear_current_signal (procinfo * pi); | |
1036 | int proc_set_gregs (procinfo * pi); | |
1037 | int proc_set_fpregs (procinfo * pi); | |
1038 | int proc_wait_for_stop (procinfo * pi); | |
1039 | int proc_run_process (procinfo * pi, int step, int signo); | |
1040 | int proc_kill (procinfo * pi, int signo); | |
1041 | int proc_parent_pid (procinfo * pi); | |
1042 | int proc_get_nthreads (procinfo * pi); | |
1043 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1044 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1045 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1046 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1047 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1048 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1049 | |
1050 | int proc_update_threads (procinfo * pi); | |
1051 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1052 | int (*func) (procinfo *, procinfo *, void *), |
1053 | void *ptr); | |
a14ed312 KB |
1054 | |
1055 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1056 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1057 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1058 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1059 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1060 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1061 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1062 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1063 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1064 | |
1065 | void proc_warn (procinfo * pi, char *func, int line); | |
1066 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1067 | |
c3f6f71d | 1068 | void |
fba45db2 | 1069 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1070 | { |
1071 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1072 | print_sys_errmsg (errmsg, errno); | |
1073 | } | |
c906108c | 1074 | |
c3f6f71d | 1075 | void |
fba45db2 | 1076 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1077 | { |
1078 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1079 | perror_with_name (errmsg); | |
1080 | } | |
c906108c | 1081 | |
77382aee PA |
1082 | /* Updates the status struct in the procinfo. There is a 'valid' |
1083 | flag, to let other functions know when this function needs to be | |
1084 | called (so the status is only read when it is needed). The status | |
1085 | file descriptor is also only opened when it is needed. Returns | |
1086 | non-zero for success, zero for failure. */ | |
c906108c | 1087 | |
c3f6f71d | 1088 | int |
fba45db2 | 1089 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1090 | { |
1091 | /* Status file descriptor is opened "lazily" */ | |
1092 | if (pi->status_fd == 0 && | |
1093 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1094 | { | |
1095 | pi->status_valid = 0; | |
1096 | return 0; | |
1097 | } | |
c906108c | 1098 | |
c3f6f71d JM |
1099 | #ifdef NEW_PROC_API |
1100 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1101 | pi->status_valid = 0; /* fail */ | |
1102 | else | |
1103 | { | |
19958708 | 1104 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1105 | depending on whether this is a main process or an LWP. */ |
1106 | if (pi->tid) | |
19958708 RM |
1107 | pi->status_valid = (read (pi->status_fd, |
1108 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1109 | sizeof (lwpstatus_t)) |
1110 | == sizeof (lwpstatus_t)); | |
1111 | else | |
1112 | { | |
19958708 | 1113 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1114 | (char *) &pi->prstatus, |
1115 | sizeof (gdb_prstatus_t)) | |
1116 | == sizeof (gdb_prstatus_t)); | |
1117 | #if 0 /*def UNIXWARE*/ | |
1118 | if (pi->status_valid && | |
1119 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1120 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1121 | /* Unixware peculiarity -- read the damn thing again! */ | |
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 | #endif /* UNIXWARE */ | |
1127 | } | |
1128 | } | |
1129 | #else /* ioctl method */ | |
1130 | #ifdef PIOCTSTATUS /* osf */ | |
1131 | if (pi->tid == 0) /* main process */ | |
1132 | { | |
1133 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1134 | pi->status_valid = |
c3f6f71d JM |
1135 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1136 | } | |
1137 | else | |
1138 | { | |
1139 | int win; | |
1140 | struct { | |
1141 | long pr_count; | |
1142 | tid_t pr_error_thread; | |
1143 | struct prstatus status; | |
1144 | } thread_status; | |
1145 | ||
1146 | thread_status.pr_count = 1; | |
1147 | thread_status.status.pr_tid = pi->tid; | |
1148 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1149 | if (win) | |
1150 | { | |
19958708 | 1151 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1152 | sizeof (pi->prstatus)); |
1153 | pi->status_valid = 1; | |
1154 | } | |
1155 | } | |
1156 | #else | |
77382aee | 1157 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1158 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1159 | #endif | |
1160 | #endif | |
c906108c | 1161 | |
c3f6f71d JM |
1162 | if (pi->status_valid) |
1163 | { | |
19958708 | 1164 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1165 | proc_why (pi), |
19958708 | 1166 | proc_what (pi), |
c3f6f71d JM |
1167 | proc_get_current_thread (pi)); |
1168 | } | |
c906108c | 1169 | |
77382aee | 1170 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1171 | pi->gregs_valid = pi->status_valid; |
1172 | #ifdef NEW_PROC_API | |
77382aee PA |
1173 | /* In the read/write multiple-fd model, the status struct includes |
1174 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1175 | pi->fpregs_valid = pi->status_valid; |
1176 | #endif | |
77382aee | 1177 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1178 | } |
c906108c | 1179 | |
77382aee | 1180 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d JM |
1181 | |
1182 | long | |
fba45db2 | 1183 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1184 | { |
1185 | if (!pi->status_valid) | |
1186 | if (!proc_get_status (pi)) | |
1187 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1188 | |
c3f6f71d | 1189 | #ifdef NEW_PROC_API |
0d06e24b JM |
1190 | # ifdef UNIXWARE |
1191 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1192 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1193 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1194 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1195 | # else | |
c3f6f71d | 1196 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1197 | # endif |
c3f6f71d JM |
1198 | #else |
1199 | return pi->prstatus.pr_flags; | |
1200 | #endif | |
1201 | } | |
c906108c | 1202 | |
77382aee | 1203 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1204 | |
c3f6f71d | 1205 | int |
fba45db2 | 1206 | proc_why (procinfo *pi) |
c3f6f71d JM |
1207 | { |
1208 | if (!pi->status_valid) | |
1209 | if (!proc_get_status (pi)) | |
1210 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1211 | |
c3f6f71d JM |
1212 | #ifdef NEW_PROC_API |
1213 | return pi->prstatus.pr_lwp.pr_why; | |
1214 | #else | |
1215 | return pi->prstatus.pr_why; | |
1216 | #endif | |
1217 | } | |
c906108c | 1218 | |
77382aee | 1219 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1220 | |
c3f6f71d | 1221 | int |
fba45db2 | 1222 | proc_what (procinfo *pi) |
c3f6f71d JM |
1223 | { |
1224 | if (!pi->status_valid) | |
1225 | if (!proc_get_status (pi)) | |
1226 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1227 | |
c3f6f71d JM |
1228 | #ifdef NEW_PROC_API |
1229 | return pi->prstatus.pr_lwp.pr_what; | |
1230 | #else | |
1231 | return pi->prstatus.pr_what; | |
c906108c | 1232 | #endif |
c3f6f71d | 1233 | } |
c906108c | 1234 | |
77382aee PA |
1235 | /* This function is only called when PI is stopped by a watchpoint. |
1236 | Assuming the OS supports it, write to *ADDR the data address which | |
1237 | triggered it and return 1. Return 0 if it is not possible to know | |
1238 | the address. */ | |
bf701c2c PM |
1239 | |
1240 | static int | |
1241 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1242 | { | |
1243 | if (!pi->status_valid) | |
1244 | if (!proc_get_status (pi)) | |
1245 | return 0; | |
1246 | ||
1247 | #ifdef NEW_PROC_API | |
1248 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1249 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1250 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1251 | #else | |
1252 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1253 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1254 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1255 | #endif | |
1256 | return 1; | |
1257 | } | |
1258 | ||
c3f6f71d | 1259 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1260 | |
1261 | /* Returns the pr_nsysarg field (number of args to the current | |
1262 | syscall). */ | |
c3f6f71d JM |
1263 | |
1264 | int | |
fba45db2 | 1265 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1266 | { |
1267 | if (!pi->status_valid) | |
1268 | if (!proc_get_status (pi)) | |
1269 | return 0; | |
19958708 | 1270 | |
c3f6f71d JM |
1271 | #ifdef NEW_PROC_API |
1272 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1273 | #else | |
1274 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1275 | #endif |
c3f6f71d | 1276 | } |
c906108c | 1277 | |
77382aee PA |
1278 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1279 | syscall). */ | |
c906108c | 1280 | |
c3f6f71d | 1281 | long * |
fba45db2 | 1282 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1283 | { |
1284 | if (!pi->status_valid) | |
1285 | if (!proc_get_status (pi)) | |
1286 | return NULL; | |
19958708 | 1287 | |
c3f6f71d JM |
1288 | #ifdef NEW_PROC_API |
1289 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1290 | #else | |
1291 | return (long *) &pi->prstatus.pr_sysarg; | |
1292 | #endif | |
1293 | } | |
c906108c | 1294 | |
77382aee PA |
1295 | /* Returns the pr_syscall field (id of current syscall if we are in |
1296 | one). */ | |
c906108c | 1297 | |
c3f6f71d | 1298 | int |
fba45db2 | 1299 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1300 | { |
1301 | if (!pi->status_valid) | |
1302 | if (!proc_get_status (pi)) | |
1303 | return 0; | |
19958708 | 1304 | |
c3f6f71d JM |
1305 | #ifdef NEW_PROC_API |
1306 | return pi->prstatus.pr_lwp.pr_syscall; | |
1307 | #else | |
1308 | return pi->prstatus.pr_syscall; | |
1309 | #endif | |
1310 | } | |
1311 | #endif /* PIOCSSPCACT */ | |
c906108c | 1312 | |
77382aee | 1313 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1314 | |
c3f6f71d JM |
1315 | long |
1316 | proc_cursig (struct procinfo *pi) | |
1317 | { | |
1318 | if (!pi->status_valid) | |
1319 | if (!proc_get_status (pi)) | |
1320 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1321 | |
c3f6f71d JM |
1322 | #ifdef NEW_PROC_API |
1323 | return pi->prstatus.pr_lwp.pr_cursig; | |
1324 | #else | |
1325 | return pi->prstatus.pr_cursig; | |
1326 | #endif | |
1327 | } | |
c906108c | 1328 | |
77382aee PA |
1329 | /* === I appologize for the messiness of this function. |
1330 | === This is an area where the different versions of | |
1331 | === /proc are more inconsistent than usual. | |
1332 | ||
1333 | Set or reset any of the following process flags: | |
1334 | PR_FORK -- forked child will inherit trace flags | |
1335 | PR_RLC -- traced process runs when last /proc file closed. | |
1336 | PR_KLC -- traced process is killed when last /proc file closed. | |
1337 | PR_ASYNC -- LWP's get to run/stop independently. | |
1338 | ||
1339 | There are three methods for doing this function: | |
1340 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1341 | [Sol6, Sol7, UW] | |
1342 | 2) Middle: PIOCSET/PIOCRESET | |
1343 | [Irix, Sol5] | |
1344 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1345 | [OSF, Sol5] | |
1346 | ||
1347 | Note: Irix does not define PR_ASYNC. | |
1348 | Note: OSF does not define PR_KLC. | |
1349 | Note: OSF is the only one that can ONLY use the oldest method. | |
1350 | ||
1351 | Arguments: | |
1352 | pi -- the procinfo | |
1353 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1354 | mode -- 1 for set, 0 for reset. | |
1355 | ||
1356 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1357 | |
c3f6f71d | 1358 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1359 | |
c3f6f71d | 1360 | static int |
fba45db2 | 1361 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1362 | { |
1363 | long win = 0; /* default to fail */ | |
1364 | ||
77382aee PA |
1365 | /* These operations affect the process as a whole, and applying them |
1366 | to an individual LWP has the same meaning as applying them to the | |
1367 | main process. Therefore, if we're ever called with a pointer to | |
1368 | an LWP's procinfo, let's substitute the process's procinfo and | |
1369 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1370 | |
1371 | if (pi->pid != 0) | |
1372 | pi = find_procinfo_or_die (pi->pid, 0); | |
1373 | ||
1374 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1375 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1376 | (which for no obvious reason has a different definition |
1377 | from one operating system to the next...) */ | |
1378 | #ifdef PCUNSET | |
1379 | #define GDBRESET PCUNSET | |
37de36c6 | 1380 | #else |
c3f6f71d JM |
1381 | #ifdef PCRESET |
1382 | #define GDBRESET PCRESET | |
37de36c6 | 1383 | #endif |
c906108c | 1384 | #endif |
c3f6f71d | 1385 | { |
37de36c6 | 1386 | procfs_ctl_t arg[2]; |
c906108c | 1387 | |
c3f6f71d JM |
1388 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1389 | arg[0] = PCSET; | |
1390 | else /* Reset the flag */ | |
1391 | arg[0] = GDBRESET; | |
c5aa993b | 1392 | |
c3f6f71d JM |
1393 | arg[1] = flag; |
1394 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1395 | } | |
1396 | #else | |
1397 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1398 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1399 | { | |
1400 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1401 | } | |
1402 | else /* Reset the flag */ | |
1403 | { | |
1404 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1405 | } | |
c906108c | 1406 | |
c3f6f71d JM |
1407 | #else |
1408 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1409 | switch (flag) { | |
1410 | case PR_RLC: | |
1411 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1412 | { | |
1413 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1414 | } | |
1415 | else /* Clear run-on-last-close */ | |
1416 | { | |
1417 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1418 | } | |
1419 | break; | |
1420 | case PR_FORK: | |
1421 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1422 | { | |
1423 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1424 | } | |
1425 | else /* Clear inherit-on-fork */ | |
1426 | { | |
1427 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1428 | } | |
1429 | break; | |
1430 | default: | |
1431 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1432 | break; | |
1433 | } | |
1434 | #endif | |
1435 | #endif | |
1436 | #endif | |
1437 | #undef GDBRESET | |
77382aee PA |
1438 | /* The above operation renders the procinfo's cached pstatus |
1439 | obsolete. */ | |
c3f6f71d | 1440 | pi->status_valid = 0; |
c906108c | 1441 | |
c3f6f71d | 1442 | if (!win) |
8a3fe4f8 | 1443 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1444 | flag == PR_FORK ? "PR_FORK" : |
1445 | flag == PR_RLC ? "PR_RLC" : | |
1446 | #ifdef PR_ASYNC | |
1447 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1448 | #endif |
1449 | #ifdef PR_KLC | |
1450 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1451 | #endif |
1452 | "<unknown flag>", | |
1453 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1454 | |
c3f6f71d JM |
1455 | return win; |
1456 | } | |
c906108c | 1457 | |
77382aee PA |
1458 | /* Set the run_on_last_close flag. Process with all threads will |
1459 | become runnable when debugger closes all /proc fds. Returns | |
1460 | non-zero for success, zero for failure. */ | |
c906108c | 1461 | |
c3f6f71d | 1462 | int |
fba45db2 | 1463 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1464 | { |
c3f6f71d JM |
1465 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1466 | } | |
c906108c | 1467 | |
77382aee PA |
1468 | /* Reset the run_on_last_close flag. The process will NOT become |
1469 | runnable when debugger closes its file handles. Returns non-zero | |
1470 | for success, zero for failure. */ | |
c906108c | 1471 | |
c3f6f71d | 1472 | int |
fba45db2 | 1473 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1474 | { |
1475 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1476 | } |
1477 | ||
0d06e24b | 1478 | #ifdef PR_KLC |
77382aee PA |
1479 | /* Set the kill_on_last_close flag. Process with all threads will be |
1480 | killed when debugger closes all /proc fds (or debugger exits or | |
1481 | dies). Returns non-zero for success, zero for failure. */ | |
0d06e24b JM |
1482 | |
1483 | int | |
fba45db2 | 1484 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1485 | { |
1486 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1487 | } | |
1488 | ||
77382aee PA |
1489 | /* Reset the kill_on_last_close flag. Process will NOT be killed when |
1490 | debugger closes its file handles (or exits or dies). Returns | |
1491 | non-zero for success, zero for failure. */ | |
0d06e24b JM |
1492 | |
1493 | int | |
fba45db2 | 1494 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1495 | { |
1496 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1497 | } | |
1498 | #endif /* PR_KLC */ | |
1499 | ||
77382aee PA |
1500 | /* Set inherit_on_fork flag. If the process forks a child while we |
1501 | are registered for events in the parent, then we will also recieve | |
1502 | events from the child. Returns non-zero for success, zero for | |
1503 | failure. */ | |
c906108c | 1504 | |
c3f6f71d | 1505 | int |
fba45db2 | 1506 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1507 | { |
1508 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1509 | } | |
c5aa993b | 1510 | |
77382aee PA |
1511 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1512 | are registered for events in the parent, then we will NOT recieve | |
1513 | events from the child. Returns non-zero for success, zero for | |
1514 | failure. */ | |
c906108c | 1515 | |
c3f6f71d | 1516 | int |
fba45db2 | 1517 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1518 | { |
1519 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1520 | } | |
c906108c | 1521 | |
c3f6f71d | 1522 | #ifdef PR_ASYNC |
77382aee PA |
1523 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1524 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1525 | non-zero for success, zero for failure. */ | |
c906108c | 1526 | |
c3f6f71d | 1527 | int |
fba45db2 | 1528 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1529 | { |
1530 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1531 | } | |
c906108c | 1532 | |
77382aee PA |
1533 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1534 | (signal etc.), then all other LWPs will stop as well. Returns | |
1535 | non-zero for success, zero for failure. */ | |
c906108c | 1536 | |
c3f6f71d | 1537 | int |
fba45db2 | 1538 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1539 | { |
1540 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1541 | } | |
1542 | #endif /* PR_ASYNC */ | |
c906108c | 1543 | |
77382aee PA |
1544 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1545 | for success, zero for failure. */ | |
c906108c | 1546 | |
c3f6f71d | 1547 | int |
fba45db2 | 1548 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1549 | { |
1550 | int win; | |
c906108c | 1551 | |
77382aee PA |
1552 | /* We might conceivably apply this operation to an LWP, and the |
1553 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1554 | |
c3f6f71d JM |
1555 | if (pi->ctl_fd == 0 && |
1556 | open_procinfo_files (pi, FD_CTL) == 0) | |
1557 | return 0; | |
1558 | else | |
1559 | { | |
1560 | #ifdef NEW_PROC_API | |
37de36c6 | 1561 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1562 | |
c3f6f71d JM |
1563 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1564 | #else /* ioctl method */ | |
1565 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1566 | /* Note: the call also reads the prstatus. */ | |
1567 | if (win) | |
1568 | { | |
1569 | pi->status_valid = 1; | |
19958708 | 1570 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1571 | proc_why (pi), |
19958708 | 1572 | proc_what (pi), |
c3f6f71d JM |
1573 | proc_get_current_thread (pi)); |
1574 | } | |
1575 | #endif | |
1576 | } | |
c906108c | 1577 | |
c3f6f71d JM |
1578 | return win; |
1579 | } | |
c5aa993b | 1580 | |
77382aee PA |
1581 | /* Wait for the process or LWP to stop (block until it does). Returns |
1582 | non-zero for success, zero for failure. */ | |
c906108c | 1583 | |
c3f6f71d | 1584 | int |
fba45db2 | 1585 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1586 | { |
c3f6f71d JM |
1587 | int win; |
1588 | ||
77382aee PA |
1589 | /* We should never have to apply this operation to any procinfo |
1590 | except the one for the main process. If that ever changes for | |
1591 | any reason, then take out the following clause and replace it | |
1592 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1593 | |
c3f6f71d JM |
1594 | if (pi->tid != 0) |
1595 | pi = find_procinfo_or_die (pi->pid, 0); | |
1596 | ||
1597 | #ifdef NEW_PROC_API | |
1598 | { | |
37de36c6 | 1599 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1600 | |
c3f6f71d JM |
1601 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1602 | /* We been runnin' and we stopped -- need to update status. */ | |
1603 | pi->status_valid = 0; | |
1604 | } | |
1605 | #else /* ioctl method */ | |
1606 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1607 | /* Above call also refreshes the prstatus. */ | |
1608 | if (win) | |
1609 | { | |
1610 | pi->status_valid = 1; | |
19958708 | 1611 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1612 | proc_why (pi), |
19958708 | 1613 | proc_what (pi), |
c3f6f71d JM |
1614 | proc_get_current_thread (pi)); |
1615 | } | |
c906108c SS |
1616 | #endif |
1617 | ||
c3f6f71d | 1618 | return win; |
c906108c SS |
1619 | } |
1620 | ||
77382aee PA |
1621 | /* Make the process or LWP runnable. |
1622 | ||
1623 | Options (not all are implemented): | |
1624 | - single-step | |
1625 | - clear current fault | |
1626 | - clear current signal | |
1627 | - abort the current system call | |
1628 | - stop as soon as finished with system call | |
1629 | - (ioctl): set traced signal set | |
1630 | - (ioctl): set held signal set | |
1631 | - (ioctl): set traced fault set | |
1632 | - (ioctl): set start pc (vaddr) | |
1633 | ||
1634 | Always clears the current fault. PI is the process or LWP to | |
1635 | operate on. If STEP is true, set the process or LWP to trap after | |
1636 | one instruction. If SIGNO is zero, clear the current signal if | |
1637 | any; if non-zero, set the current signal to this one. Returns | |
1638 | non-zero for success, zero for failure. */ | |
c3f6f71d JM |
1639 | |
1640 | int | |
fba45db2 | 1641 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1642 | { |
1643 | int win; | |
1644 | int runflags; | |
1645 | ||
77382aee PA |
1646 | /* We will probably have to apply this operation to individual |
1647 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1648 | |
c3f6f71d JM |
1649 | if (pi->ctl_fd == 0 && |
1650 | open_procinfo_files (pi, FD_CTL) == 0) | |
1651 | { | |
1652 | return 0; | |
1653 | } | |
c906108c | 1654 | |
c3f6f71d JM |
1655 | runflags = PRCFAULT; /* always clear current fault */ |
1656 | if (step) | |
1657 | runflags |= PRSTEP; | |
1658 | if (signo == 0) | |
1659 | runflags |= PRCSIG; | |
1660 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1661 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1662 | |
c3f6f71d JM |
1663 | #ifdef NEW_PROC_API |
1664 | { | |
37de36c6 | 1665 | procfs_ctl_t cmd[2]; |
c906108c | 1666 | |
c3f6f71d JM |
1667 | cmd[0] = PCRUN; |
1668 | cmd[1] = runflags; | |
1669 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1670 | } | |
1671 | #else /* ioctl method */ | |
1672 | { | |
1673 | prrun_t prrun; | |
c906108c | 1674 | |
c3f6f71d JM |
1675 | memset (&prrun, 0, sizeof (prrun)); |
1676 | prrun.pr_flags = runflags; | |
1677 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1678 | } | |
1679 | #endif | |
c906108c | 1680 | |
c3f6f71d JM |
1681 | return win; |
1682 | } | |
c906108c | 1683 | |
77382aee PA |
1684 | /* Register to trace signals in the process or LWP. Returns non-zero |
1685 | for success, zero for failure. */ | |
c906108c | 1686 | |
c3f6f71d | 1687 | int |
37de36c6 | 1688 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1689 | { |
c3f6f71d JM |
1690 | int win; |
1691 | ||
77382aee PA |
1692 | /* We should never have to apply this operation to any procinfo |
1693 | except the one for the main process. If that ever changes for | |
1694 | any reason, then take out the following clause and replace it | |
1695 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1696 | |
c3f6f71d JM |
1697 | if (pi->tid != 0) |
1698 | pi = find_procinfo_or_die (pi->pid, 0); | |
1699 | ||
1700 | #ifdef NEW_PROC_API | |
1701 | { | |
1702 | struct { | |
37de36c6 | 1703 | procfs_ctl_t cmd; |
c3f6f71d | 1704 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1705 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1706 | } arg; |
c906108c | 1707 | |
c3f6f71d | 1708 | arg.cmd = PCSTRACE; |
37de36c6 | 1709 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1710 | |
c3f6f71d JM |
1711 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1712 | } | |
1713 | #else /* ioctl method */ | |
1714 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1715 | #endif | |
1716 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1717 | pi->status_valid = 0; | |
c906108c | 1718 | |
c3f6f71d | 1719 | if (!win) |
8a3fe4f8 | 1720 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1721 | return win; |
c906108c SS |
1722 | } |
1723 | ||
77382aee PA |
1724 | /* Register to trace hardware faults in the process or LWP. Returns |
1725 | non-zero for success, zero for failure. */ | |
c906108c | 1726 | |
c3f6f71d | 1727 | int |
fba45db2 | 1728 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1729 | { |
1730 | int win; | |
1731 | ||
77382aee PA |
1732 | /* We should never have to apply this operation to any procinfo |
1733 | except the one for the main process. If that ever changes for | |
1734 | any reason, then take out the following clause and replace it | |
1735 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1736 | |
c3f6f71d JM |
1737 | if (pi->tid != 0) |
1738 | pi = find_procinfo_or_die (pi->pid, 0); | |
1739 | ||
1740 | #ifdef NEW_PROC_API | |
1741 | { | |
1742 | struct { | |
37de36c6 | 1743 | procfs_ctl_t cmd; |
c3f6f71d JM |
1744 | /* Use char array to avoid alignment issues. */ |
1745 | char fltset[sizeof (fltset_t)]; | |
1746 | } arg; | |
c906108c | 1747 | |
c3f6f71d JM |
1748 | arg.cmd = PCSFAULT; |
1749 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1750 | |
c3f6f71d JM |
1751 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1752 | } | |
1753 | #else /* ioctl method */ | |
1754 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1755 | #endif | |
1756 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1757 | pi->status_valid = 0; | |
c906108c | 1758 | |
c3f6f71d JM |
1759 | return win; |
1760 | } | |
c5aa993b | 1761 | |
77382aee PA |
1762 | /* Register to trace entry to system calls in the process or LWP. |
1763 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1764 | |
c3f6f71d | 1765 | int |
fba45db2 | 1766 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1767 | { |
c3f6f71d JM |
1768 | int win; |
1769 | ||
77382aee PA |
1770 | /* We should never have to apply this operation to any procinfo |
1771 | except the one for the main process. If that ever changes for | |
1772 | any reason, then take out the following clause and replace it | |
1773 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1774 | |
c3f6f71d JM |
1775 | if (pi->tid != 0) |
1776 | pi = find_procinfo_or_die (pi->pid, 0); | |
1777 | ||
1778 | #ifdef NEW_PROC_API | |
1779 | { | |
37de36c6 KB |
1780 | struct gdb_proc_ctl_pcsentry { |
1781 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1782 | /* Use char array to avoid alignment issues. */ |
1783 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1784 | } *argp; |
1785 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1786 | - sizeof (sysset_t) |
37de36c6 | 1787 | + sysset_t_size (pi); |
c3f6f71d | 1788 | |
37de36c6 | 1789 | argp = xmalloc (argp_size); |
c3f6f71d | 1790 | |
37de36c6 KB |
1791 | argp->cmd = PCSENTRY; |
1792 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1793 | ||
1794 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1795 | xfree (argp); | |
c3f6f71d JM |
1796 | } |
1797 | #else /* ioctl method */ | |
1798 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1799 | #endif | |
77382aee PA |
1800 | /* The above operation renders the procinfo's cached pstatus |
1801 | obsolete. */ | |
c3f6f71d | 1802 | pi->status_valid = 0; |
19958708 | 1803 | |
c3f6f71d | 1804 | return win; |
c906108c SS |
1805 | } |
1806 | ||
77382aee PA |
1807 | /* Register to trace exit from system calls in the process or LWP. |
1808 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1809 | |
c3f6f71d | 1810 | int |
fba45db2 | 1811 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1812 | { |
1813 | int win; | |
1814 | ||
77382aee PA |
1815 | /* We should never have to apply this operation to any procinfo |
1816 | except the one for the main process. If that ever changes for | |
1817 | any reason, then take out the following clause and replace it | |
1818 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1819 | |
c3f6f71d JM |
1820 | if (pi->tid != 0) |
1821 | pi = find_procinfo_or_die (pi->pid, 0); | |
1822 | ||
1823 | #ifdef NEW_PROC_API | |
1824 | { | |
37de36c6 KB |
1825 | struct gdb_proc_ctl_pcsexit { |
1826 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1827 | /* Use char array to avoid alignment issues. */ |
1828 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1829 | } *argp; |
1830 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1831 | - sizeof (sysset_t) |
37de36c6 | 1832 | + sysset_t_size (pi); |
c906108c | 1833 | |
37de36c6 | 1834 | argp = xmalloc (argp_size); |
c906108c | 1835 | |
37de36c6 KB |
1836 | argp->cmd = PCSEXIT; |
1837 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1838 | ||
1839 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1840 | xfree (argp); | |
c3f6f71d JM |
1841 | } |
1842 | #else /* ioctl method */ | |
1843 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1844 | #endif | |
77382aee PA |
1845 | /* The above operation renders the procinfo's cached pstatus |
1846 | obsolete. */ | |
c3f6f71d | 1847 | pi->status_valid = 0; |
c906108c | 1848 | |
c3f6f71d JM |
1849 | return win; |
1850 | } | |
c906108c | 1851 | |
77382aee PA |
1852 | /* Specify the set of blocked / held signals in the process or LWP. |
1853 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1854 | |
c3f6f71d | 1855 | int |
37de36c6 | 1856 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1857 | { |
c3f6f71d JM |
1858 | int win; |
1859 | ||
77382aee PA |
1860 | /* We should never have to apply this operation to any procinfo |
1861 | except the one for the main process. If that ever changes for | |
1862 | any reason, then take out the following clause and replace it | |
1863 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1864 | |
c3f6f71d JM |
1865 | if (pi->tid != 0) |
1866 | pi = find_procinfo_or_die (pi->pid, 0); | |
1867 | ||
1868 | #ifdef NEW_PROC_API | |
1869 | { | |
1870 | struct { | |
37de36c6 | 1871 | procfs_ctl_t cmd; |
c3f6f71d | 1872 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1873 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1874 | } arg; |
1875 | ||
1876 | arg.cmd = PCSHOLD; | |
37de36c6 | 1877 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1878 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1879 | } | |
c906108c | 1880 | #else |
c3f6f71d | 1881 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1882 | #endif |
77382aee PA |
1883 | /* The above operation renders the procinfo's cached pstatus |
1884 | obsolete. */ | |
c3f6f71d JM |
1885 | pi->status_valid = 0; |
1886 | ||
1887 | return win; | |
c906108c SS |
1888 | } |
1889 | ||
77382aee PA |
1890 | /* Returns the set of signals that are pending in the process or LWP. |
1891 | Will also copy the sigset if SAVE is non-zero. */ | |
c906108c | 1892 | |
37de36c6 KB |
1893 | gdb_sigset_t * |
1894 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1895 | { |
37de36c6 | 1896 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1897 | |
77382aee PA |
1898 | /* We should never have to apply this operation to any procinfo |
1899 | except the one for the main process. If that ever changes for | |
1900 | any reason, then take out the following clause and replace it | |
1901 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1902 | |
c3f6f71d JM |
1903 | if (pi->tid != 0) |
1904 | pi = find_procinfo_or_die (pi->pid, 0); | |
1905 | ||
1906 | if (!pi->status_valid) | |
1907 | if (!proc_get_status (pi)) | |
1908 | return NULL; | |
1909 | ||
1910 | #ifdef NEW_PROC_API | |
1911 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1912 | #else | |
1913 | ret = &pi->prstatus.pr_sigpend; | |
1914 | #endif | |
1915 | if (save && ret) | |
37de36c6 | 1916 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1917 | |
c3f6f71d JM |
1918 | return ret; |
1919 | } | |
c906108c | 1920 | |
77382aee PA |
1921 | /* Returns the set of signal actions. Will also copy the sigactionset |
1922 | if SAVE is non-zero. */ | |
c906108c | 1923 | |
37de36c6 KB |
1924 | gdb_sigaction_t * |
1925 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 1926 | { |
37de36c6 | 1927 | gdb_sigaction_t *ret = NULL; |
c3f6f71d | 1928 | |
77382aee PA |
1929 | /* We should never have to apply this operation to any procinfo |
1930 | except the one for the main process. If that ever changes for | |
1931 | any reason, then take out the following clause and replace it | |
1932 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1933 | |
c3f6f71d JM |
1934 | if (pi->tid != 0) |
1935 | pi = find_procinfo_or_die (pi->pid, 0); | |
1936 | ||
1937 | if (!pi->status_valid) | |
1938 | if (!proc_get_status (pi)) | |
1939 | return NULL; | |
1940 | ||
1941 | #ifdef NEW_PROC_API | |
1942 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1943 | #else | |
1944 | ret = &pi->prstatus.pr_action; | |
1945 | #endif | |
1946 | if (save && ret) | |
37de36c6 | 1947 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 1948 | |
c3f6f71d JM |
1949 | return ret; |
1950 | } | |
c5aa993b | 1951 | |
77382aee PA |
1952 | /* Returns the set of signals that are held / blocked. Will also copy |
1953 | the sigset if SAVE is non-zero. */ | |
c906108c | 1954 | |
37de36c6 KB |
1955 | gdb_sigset_t * |
1956 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1957 | { |
37de36c6 | 1958 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1959 | |
77382aee PA |
1960 | /* We should never have to apply this operation to any procinfo |
1961 | except the one for the main process. If that ever changes for | |
1962 | any reason, then take out the following clause and replace it | |
1963 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1964 | |
c3f6f71d JM |
1965 | if (pi->tid != 0) |
1966 | pi = find_procinfo_or_die (pi->pid, 0); | |
1967 | ||
1968 | #ifdef NEW_PROC_API | |
1969 | if (!pi->status_valid) | |
1970 | if (!proc_get_status (pi)) | |
1971 | return NULL; | |
1972 | ||
1973 | #ifdef UNIXWARE | |
1974 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1975 | #else |
c3f6f71d JM |
1976 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1977 | #endif /* UNIXWARE */ | |
1978 | #else /* not NEW_PROC_API */ | |
1979 | { | |
37de36c6 | 1980 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1981 | |
1982 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1983 | ret = &sigheld; | |
1984 | } | |
1985 | #endif /* NEW_PROC_API */ | |
1986 | if (save && ret) | |
37de36c6 | 1987 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1988 | |
1989 | return ret; | |
c906108c SS |
1990 | } |
1991 | ||
77382aee PA |
1992 | /* Returns the set of signals that are traced / debugged. Will also |
1993 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1994 | |
37de36c6 KB |
1995 | gdb_sigset_t * |
1996 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1997 | { |
37de36c6 | 1998 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1999 | |
77382aee PA |
2000 | /* We should never have to apply this operation to any procinfo |
2001 | except the one for the main process. If that ever changes for | |
2002 | any reason, then take out the following clause and replace it | |
2003 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2004 | |
c3f6f71d JM |
2005 | if (pi->tid != 0) |
2006 | pi = find_procinfo_or_die (pi->pid, 0); | |
2007 | ||
2008 | #ifdef NEW_PROC_API | |
2009 | if (!pi->status_valid) | |
2010 | if (!proc_get_status (pi)) | |
2011 | return NULL; | |
2012 | ||
2013 | ret = &pi->prstatus.pr_sigtrace; | |
2014 | #else | |
2015 | { | |
37de36c6 | 2016 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2017 | |
2018 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2019 | ret = &sigtrace; | |
2020 | } | |
c906108c | 2021 | #endif |
c3f6f71d | 2022 | if (save && ret) |
37de36c6 | 2023 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2024 | |
c3f6f71d JM |
2025 | return ret; |
2026 | } | |
c906108c | 2027 | |
77382aee PA |
2028 | /* Add SIGNO to the set of signals that are traced. Returns non-zero |
2029 | for success, zero for failure. */ | |
c906108c | 2030 | |
c3f6f71d | 2031 | int |
fba45db2 | 2032 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2033 | { |
37de36c6 | 2034 | gdb_sigset_t temp; |
c3f6f71d | 2035 | |
77382aee PA |
2036 | /* We should never have to apply this operation to any procinfo |
2037 | except the one for the main process. If that ever changes for | |
2038 | any reason, then take out the following clause and replace it | |
2039 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2040 | |
c3f6f71d JM |
2041 | if (pi->tid != 0) |
2042 | pi = find_procinfo_or_die (pi->pid, 0); | |
2043 | ||
2044 | if (pi) | |
c906108c | 2045 | { |
c3f6f71d | 2046 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2047 | { |
3c95f01c | 2048 | gdb_praddset (&temp, signo); |
c3f6f71d | 2049 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2050 | } |
2051 | } | |
c5aa993b | 2052 | |
c3f6f71d JM |
2053 | return 0; /* failure */ |
2054 | } | |
c906108c | 2055 | |
77382aee PA |
2056 | /* Remove SIGNO from the set of signals that are traced. Returns |
2057 | non-zero for success, zero for failure. */ | |
c906108c | 2058 | |
c3f6f71d | 2059 | int |
fba45db2 | 2060 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2061 | { |
37de36c6 | 2062 | gdb_sigset_t temp; |
c3f6f71d | 2063 | |
77382aee PA |
2064 | /* We should never have to apply this operation to any procinfo |
2065 | except the one for the main process. If that ever changes for | |
2066 | any reason, then take out the following clause and replace it | |
2067 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2068 | |
c3f6f71d JM |
2069 | if (pi->tid != 0) |
2070 | pi = find_procinfo_or_die (pi->pid, 0); | |
2071 | ||
2072 | if (pi) | |
c906108c | 2073 | { |
c3f6f71d | 2074 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2075 | { |
3c95f01c | 2076 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2077 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2078 | } |
c906108c | 2079 | } |
c906108c | 2080 | |
c3f6f71d | 2081 | return 0; /* failure */ |
c906108c SS |
2082 | } |
2083 | ||
77382aee PA |
2084 | /* Returns the set of hardware faults that are traced /debugged. Will |
2085 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d JM |
2086 | |
2087 | fltset_t * | |
fba45db2 | 2088 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2089 | { |
2090 | fltset_t *ret = NULL; | |
2091 | ||
77382aee PA |
2092 | /* We should never have to apply this operation to any procinfo |
2093 | except the one for the main process. If that ever changes for | |
2094 | any reason, then take out the following clause and replace it | |
2095 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2096 | |
c3f6f71d JM |
2097 | if (pi->tid != 0) |
2098 | pi = find_procinfo_or_die (pi->pid, 0); | |
2099 | ||
2100 | #ifdef NEW_PROC_API | |
2101 | if (!pi->status_valid) | |
2102 | if (!proc_get_status (pi)) | |
2103 | return NULL; | |
2104 | ||
2105 | ret = &pi->prstatus.pr_flttrace; | |
2106 | #else | |
2107 | { | |
2108 | static fltset_t flttrace; | |
2109 | ||
2110 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2111 | ret = &flttrace; | |
2112 | } | |
2113 | #endif | |
2114 | if (save && ret) | |
2115 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2116 | |
c3f6f71d JM |
2117 | return ret; |
2118 | } | |
c906108c | 2119 | |
77382aee PA |
2120 | /* Returns the set of syscalls that are traced /debugged on entry. |
2121 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2122 | |
c3f6f71d | 2123 | sysset_t * |
fba45db2 | 2124 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2125 | { |
2126 | sysset_t *ret = NULL; | |
2127 | ||
77382aee PA |
2128 | /* We should never have to apply this operation to any procinfo |
2129 | except the one for the main process. If that ever changes for | |
2130 | any reason, then take out the following clause and replace it | |
2131 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2132 | |
c3f6f71d JM |
2133 | if (pi->tid != 0) |
2134 | pi = find_procinfo_or_die (pi->pid, 0); | |
2135 | ||
2136 | #ifdef NEW_PROC_API | |
2137 | if (!pi->status_valid) | |
2138 | if (!proc_get_status (pi)) | |
2139 | return NULL; | |
2140 | ||
37de36c6 | 2141 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2142 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2143 | #else /* DYNAMIC_SYSCALLS */ |
2144 | { | |
2145 | static sysset_t *sysentry; | |
2146 | size_t size; | |
2147 | ||
2148 | if (!sysentry) | |
2149 | sysentry = sysset_t_alloc (pi); | |
2150 | ret = sysentry; | |
2151 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2152 | return NULL; | |
2153 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2154 | { | |
2155 | gdb_premptysysset (sysentry); | |
2156 | } | |
2157 | else | |
2158 | { | |
2159 | int rsize; | |
2160 | ||
2161 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 2162 | SEEK_SET) |
37de36c6 KB |
2163 | != (off_t) pi->prstatus.pr_sysentry_offset) |
2164 | return NULL; | |
2165 | size = sysset_t_size (pi); | |
2166 | gdb_premptysysset (sysentry); | |
2167 | rsize = read (pi->status_fd, sysentry, size); | |
2168 | if (rsize < 0) | |
2169 | return NULL; | |
2170 | } | |
2171 | } | |
2172 | #endif /* DYNAMIC_SYSCALLS */ | |
2173 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2174 | { |
2175 | static sysset_t sysentry; | |
c906108c | 2176 | |
c3f6f71d JM |
2177 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2178 | ret = &sysentry; | |
2179 | } | |
37de36c6 | 2180 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2181 | if (save && ret) |
37de36c6 | 2182 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2183 | |
c3f6f71d JM |
2184 | return ret; |
2185 | } | |
c5aa993b | 2186 | |
77382aee PA |
2187 | /* Returns the set of syscalls that are traced /debugged on exit. |
2188 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2189 | |
c3f6f71d | 2190 | sysset_t * |
fba45db2 | 2191 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2192 | { |
c3f6f71d JM |
2193 | sysset_t * ret = NULL; |
2194 | ||
77382aee PA |
2195 | /* We should never have to apply this operation to any procinfo |
2196 | except the one for the main process. If that ever changes for | |
2197 | any reason, then take out the following clause and replace it | |
2198 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2199 | |
c3f6f71d JM |
2200 | if (pi->tid != 0) |
2201 | pi = find_procinfo_or_die (pi->pid, 0); | |
2202 | ||
2203 | #ifdef NEW_PROC_API | |
2204 | if (!pi->status_valid) | |
2205 | if (!proc_get_status (pi)) | |
2206 | return NULL; | |
2207 | ||
37de36c6 | 2208 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2209 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2210 | #else /* DYNAMIC_SYSCALLS */ |
2211 | { | |
2212 | static sysset_t *sysexit; | |
2213 | size_t size; | |
2214 | ||
2215 | if (!sysexit) | |
2216 | sysexit = sysset_t_alloc (pi); | |
2217 | ret = sysexit; | |
2218 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2219 | return NULL; | |
2220 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2221 | { | |
2222 | gdb_premptysysset (sysexit); | |
2223 | } | |
2224 | else | |
2225 | { | |
2226 | int rsize; | |
2227 | ||
77382aee PA |
2228 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2229 | SEEK_SET) | |
37de36c6 KB |
2230 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2231 | return NULL; | |
2232 | size = sysset_t_size (pi); | |
2233 | gdb_premptysysset (sysexit); | |
2234 | rsize = read (pi->status_fd, sysexit, size); | |
2235 | if (rsize < 0) | |
2236 | return NULL; | |
2237 | } | |
2238 | } | |
2239 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2240 | #else |
2241 | { | |
2242 | static sysset_t sysexit; | |
c5aa993b | 2243 | |
c3f6f71d JM |
2244 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2245 | ret = &sysexit; | |
2246 | } | |
2247 | #endif | |
2248 | if (save && ret) | |
37de36c6 | 2249 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2250 | |
2251 | return ret; | |
2252 | } | |
c906108c | 2253 | |
77382aee PA |
2254 | /* The current fault (if any) is cleared; the associated signal will |
2255 | not be sent to the process or LWP when it resumes. Returns | |
2256 | non-zero for success, zero for failure. */ | |
c906108c | 2257 | |
c3f6f71d | 2258 | int |
fba45db2 | 2259 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2260 | { |
2261 | int win; | |
2262 | ||
77382aee PA |
2263 | /* We should never have to apply this operation to any procinfo |
2264 | except the one for the main process. If that ever changes for | |
2265 | any reason, then take out the following clause and replace it | |
2266 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2267 | |
c3f6f71d JM |
2268 | if (pi->tid != 0) |
2269 | pi = find_procinfo_or_die (pi->pid, 0); | |
2270 | ||
2271 | #ifdef NEW_PROC_API | |
2272 | { | |
37de36c6 | 2273 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2274 | |
c3f6f71d JM |
2275 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2276 | } | |
2277 | #else | |
2278 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2279 | #endif | |
2280 | ||
2281 | return win; | |
c906108c SS |
2282 | } |
2283 | ||
77382aee PA |
2284 | /* Set the "current signal" that will be delivered next to the |
2285 | process. NOTE: semantics are different from those of KILL. This | |
2286 | signal will be delivered to the process or LWP immediately when it | |
2287 | is resumed (even if the signal is held/blocked); it will NOT | |
2288 | immediately cause another event of interest, and will NOT first | |
2289 | trap back to the debugger. Returns non-zero for success, zero for | |
2290 | failure. */ | |
c3f6f71d JM |
2291 | |
2292 | int | |
fba45db2 | 2293 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2294 | { |
2295 | int win; | |
2296 | struct { | |
37de36c6 | 2297 | procfs_ctl_t cmd; |
c3f6f71d | 2298 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2299 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2300 | } arg; |
73930d4d | 2301 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2302 | ptid_t wait_ptid; |
2303 | struct target_waitstatus wait_status; | |
c3f6f71d | 2304 | |
77382aee PA |
2305 | /* We should never have to apply this operation to any procinfo |
2306 | except the one for the main process. If that ever changes for | |
2307 | any reason, then take out the following clause and replace it | |
2308 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2309 | |
c3f6f71d JM |
2310 | if (pi->tid != 0) |
2311 | pi = find_procinfo_or_die (pi->pid, 0); | |
2312 | ||
2313 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2314 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2315 | receives a PIOCSSIG with a signal identical to the current |
2316 | signal, it messes up the current signal. Work around the kernel | |
2317 | bug. */ | |
c3f6f71d JM |
2318 | if (signo > 0 && |
2319 | signo == proc_cursig (pi)) | |
2320 | return 1; /* I assume this is a success? */ | |
2321 | #endif | |
2322 | ||
2323 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2324 | get_last_target_status (&wait_ptid, &wait_status); |
2325 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2326 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2327 | && wait_status.value.sig == target_signal_from_host (signo) | |
2328 | && proc_get_status (pi) | |
2329 | #ifdef NEW_PROC_API | |
2330 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2331 | #else | |
2332 | && pi->prstatus.pr_info.si_signo == signo | |
2333 | #endif | |
2334 | ) | |
2335 | /* Use the siginfo associated with the signal being | |
2336 | redelivered. */ | |
2337 | #ifdef NEW_PROC_API | |
73930d4d | 2338 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2339 | #else |
73930d4d | 2340 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2341 | #endif |
2342 | else | |
2343 | { | |
73930d4d KH |
2344 | mysinfo.si_signo = signo; |
2345 | mysinfo.si_code = 0; | |
2346 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2347 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2348 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2349 | } |
c3f6f71d JM |
2350 | |
2351 | #ifdef NEW_PROC_API | |
2352 | arg.cmd = PCSSIG; | |
2353 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2354 | #else | |
2355 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2356 | #endif | |
c906108c | 2357 | |
c3f6f71d JM |
2358 | return win; |
2359 | } | |
c906108c | 2360 | |
77382aee PA |
2361 | /* The current signal (if any) is cleared, and is not sent to the |
2362 | process or LWP when it resumes. Returns non-zero for success, zero | |
2363 | for failure. */ | |
c906108c | 2364 | |
c3f6f71d | 2365 | int |
fba45db2 | 2366 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2367 | { |
2368 | int win; | |
2369 | ||
77382aee PA |
2370 | /* We should never have to apply this operation to any procinfo |
2371 | except the one for the main process. If that ever changes for | |
2372 | any reason, then take out the following clause and replace it | |
2373 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2374 | |
c3f6f71d JM |
2375 | if (pi->tid != 0) |
2376 | pi = find_procinfo_or_die (pi->pid, 0); | |
2377 | ||
2378 | #ifdef NEW_PROC_API | |
2379 | { | |
2380 | struct { | |
37de36c6 | 2381 | procfs_ctl_t cmd; |
c3f6f71d | 2382 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2383 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2384 | } arg; |
73930d4d | 2385 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2386 | |
2387 | arg.cmd = PCSSIG; | |
2388 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2389 | mysinfo.si_signo = 0; |
2390 | mysinfo.si_code = 0; | |
2391 | mysinfo.si_errno = 0; | |
2392 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2393 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2394 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2395 | |
2396 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2397 | } | |
2398 | #else | |
2399 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2400 | #endif | |
c906108c | 2401 | |
c3f6f71d JM |
2402 | return win; |
2403 | } | |
c906108c | 2404 | |
772cf8be MK |
2405 | /* Return the general-purpose registers for the process or LWP |
2406 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2407 | |
c3f6f71d | 2408 | gdb_gregset_t * |
fba45db2 | 2409 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2410 | { |
2411 | if (!pi->status_valid || !pi->gregs_valid) | |
2412 | if (!proc_get_status (pi)) | |
2413 | return NULL; | |
2414 | ||
772cf8be MK |
2415 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2416 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2417 | |
2418 | #ifdef NEW_PROC_API | |
772cf8be | 2419 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2420 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2421 | # else |
c3f6f71d | 2422 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2423 | # endif |
2424 | #else | |
c3f6f71d | 2425 | return &pi->prstatus.pr_reg; |
772cf8be | 2426 | #endif |
c3f6f71d | 2427 | } |
c5aa993b | 2428 | |
772cf8be MK |
2429 | /* Return the general-purpose registers for the process or LWP |
2430 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2431 | |
c3f6f71d | 2432 | gdb_fpregset_t * |
fba45db2 | 2433 | proc_get_fpregs (procinfo *pi) |
c906108c | 2434 | { |
c3f6f71d JM |
2435 | #ifdef NEW_PROC_API |
2436 | if (!pi->status_valid || !pi->fpregs_valid) | |
2437 | if (!proc_get_status (pi)) | |
2438 | return NULL; | |
2439 | ||
772cf8be | 2440 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2441 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2442 | # else |
c3f6f71d | 2443 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2444 | # endif |
c5aa993b | 2445 | |
772cf8be | 2446 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2447 | if (pi->fpregs_valid) |
772cf8be | 2448 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2449 | else |
c906108c | 2450 | { |
772cf8be | 2451 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2452 | { |
c3f6f71d | 2453 | return NULL; |
c906108c | 2454 | } |
c3f6f71d | 2455 | else |
c906108c | 2456 | { |
772cf8be | 2457 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2458 | struct { |
2459 | long pr_count; | |
2460 | tid_t pr_error_thread; | |
2461 | tfpregset_t thread_1; | |
2462 | } thread_fpregs; | |
2463 | ||
2464 | thread_fpregs.pr_count = 1; | |
2465 | thread_fpregs.thread_1.tid = pi->tid; | |
2466 | ||
772cf8be MK |
2467 | if (pi->tid == 0 |
2468 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2469 | { |
2470 | pi->fpregs_valid = 1; | |
772cf8be | 2471 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2472 | } |
772cf8be MK |
2473 | else if (pi->tid != 0 |
2474 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2475 | { |
2476 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2477 | sizeof (pi->fpregset)); | |
2478 | pi->fpregs_valid = 1; | |
772cf8be | 2479 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2480 | } |
2481 | else | |
2482 | { | |
2483 | return NULL; | |
2484 | } | |
772cf8be | 2485 | # else |
c3f6f71d JM |
2486 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2487 | { | |
2488 | pi->fpregs_valid = 1; | |
772cf8be | 2489 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2490 | } |
2491 | else | |
2492 | { | |
2493 | return NULL; | |
2494 | } | |
772cf8be | 2495 | # endif |
c906108c | 2496 | } |
c906108c | 2497 | } |
772cf8be | 2498 | #endif /* NEW_PROC_API */ |
c906108c SS |
2499 | } |
2500 | ||
772cf8be MK |
2501 | /* Write the general-purpose registers back to the process or LWP |
2502 | corresponding to PI. Return non-zero for success, zero for | |
2503 | failure. */ | |
c3f6f71d JM |
2504 | |
2505 | int | |
fba45db2 | 2506 | proc_set_gregs (procinfo *pi) |
c906108c | 2507 | { |
c3f6f71d JM |
2508 | gdb_gregset_t *gregs; |
2509 | int win; | |
c5aa993b | 2510 | |
772cf8be MK |
2511 | gregs = proc_get_gregs (pi); |
2512 | if (gregs == NULL) | |
2513 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2514 | |
772cf8be | 2515 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2516 | { |
c3f6f71d | 2517 | return 0; |
c906108c | 2518 | } |
c3f6f71d | 2519 | else |
c906108c | 2520 | { |
c3f6f71d JM |
2521 | #ifdef NEW_PROC_API |
2522 | struct { | |
37de36c6 | 2523 | procfs_ctl_t cmd; |
c3f6f71d JM |
2524 | /* Use char array to avoid alignment issues. */ |
2525 | char gregs[sizeof (gdb_gregset_t)]; | |
2526 | } arg; | |
2527 | ||
772cf8be | 2528 | arg.cmd = PCSREG; |
c3f6f71d JM |
2529 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2530 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2531 | #else | |
2532 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2533 | #endif | |
c906108c | 2534 | } |
c3f6f71d | 2535 | |
772cf8be | 2536 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2537 | pi->gregs_valid = 0; |
2538 | return win; | |
c906108c SS |
2539 | } |
2540 | ||
772cf8be MK |
2541 | /* Write the floating-pointer registers back to the process or LWP |
2542 | corresponding to PI. Return non-zero for success, zero for | |
2543 | failure. */ | |
c3f6f71d JM |
2544 | |
2545 | int | |
fba45db2 | 2546 | proc_set_fpregs (procinfo *pi) |
c906108c | 2547 | { |
c3f6f71d JM |
2548 | gdb_fpregset_t *fpregs; |
2549 | int win; | |
2550 | ||
772cf8be MK |
2551 | fpregs = proc_get_fpregs (pi); |
2552 | if (fpregs == NULL) | |
2553 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2554 | |
772cf8be | 2555 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2556 | { |
c3f6f71d | 2557 | return 0; |
c906108c | 2558 | } |
c3f6f71d | 2559 | else |
c906108c | 2560 | { |
c3f6f71d JM |
2561 | #ifdef NEW_PROC_API |
2562 | struct { | |
37de36c6 | 2563 | procfs_ctl_t cmd; |
c3f6f71d JM |
2564 | /* Use char array to avoid alignment issues. */ |
2565 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2566 | } arg; | |
2567 | ||
772cf8be | 2568 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2569 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2570 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2571 | #else | |
772cf8be | 2572 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2573 | if (pi->tid == 0) |
2574 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2575 | else | |
2576 | { | |
2577 | struct { | |
2578 | long pr_count; | |
2579 | tid_t pr_error_thread; | |
2580 | tfpregset_t thread_1; | |
2581 | } thread_fpregs; | |
2582 | ||
2583 | thread_fpregs.pr_count = 1; | |
2584 | thread_fpregs.thread_1.tid = pi->tid; | |
2585 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2586 | sizeof (*fpregs)); | |
2587 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2588 | } | |
772cf8be | 2589 | # else |
c3f6f71d | 2590 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2591 | # endif |
2592 | #endif /* NEW_PROC_API */ | |
c906108c | 2593 | } |
c3f6f71d | 2594 | |
772cf8be | 2595 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2596 | pi->fpregs_valid = 0; |
2597 | return win; | |
c906108c SS |
2598 | } |
2599 | ||
77382aee PA |
2600 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2601 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2602 | |
c3f6f71d | 2603 | int |
fba45db2 | 2604 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2605 | { |
2606 | int win; | |
c906108c | 2607 | |
77382aee PA |
2608 | /* We might conceivably apply this operation to an LWP, and the |
2609 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2610 | |
c3f6f71d JM |
2611 | if (pi->ctl_fd == 0 && |
2612 | open_procinfo_files (pi, FD_CTL) == 0) | |
2613 | { | |
2614 | return 0; | |
2615 | } | |
2616 | else | |
2617 | { | |
2618 | #ifdef NEW_PROC_API | |
37de36c6 | 2619 | procfs_ctl_t cmd[2]; |
c906108c | 2620 | |
c3f6f71d JM |
2621 | cmd[0] = PCKILL; |
2622 | cmd[1] = signo; | |
2623 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2624 | #else /* ioctl method */ | |
2625 | /* FIXME: do I need the Alpha OSF fixups present in | |
2626 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2627 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2628 | #endif | |
2629 | } | |
c906108c | 2630 | |
c3f6f71d JM |
2631 | return win; |
2632 | } | |
c906108c | 2633 | |
77382aee PA |
2634 | /* Find the pid of the process that started this one. Returns the |
2635 | parent process pid, or zero. */ | |
c906108c | 2636 | |
c3f6f71d | 2637 | int |
fba45db2 | 2638 | proc_parent_pid (procinfo *pi) |
c906108c | 2639 | { |
77382aee PA |
2640 | /* We should never have to apply this operation to any procinfo |
2641 | except the one for the main process. If that ever changes for | |
2642 | any reason, then take out the following clause and replace it | |
2643 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2644 | |
c3f6f71d JM |
2645 | if (pi->tid != 0) |
2646 | pi = find_procinfo_or_die (pi->pid, 0); | |
2647 | ||
2648 | if (!pi->status_valid) | |
2649 | if (!proc_get_status (pi)) | |
2650 | return 0; | |
c5aa993b | 2651 | |
c3f6f71d JM |
2652 | return pi->prstatus.pr_ppid; |
2653 | } | |
2654 | ||
9a043c1d AC |
2655 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2656 | (a.k.a void pointer)! */ | |
2657 | ||
1ca8fce0 JB |
2658 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2659 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2660 | static void * |
2661 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2662 | { | |
4e906f53 | 2663 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2664 | void *ptr; |
2665 | ||
4e906f53 | 2666 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2667 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2668 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2669 | return ptr; |
2670 | } | |
1ca8fce0 | 2671 | #endif |
9a043c1d | 2672 | |
c3f6f71d | 2673 | int |
fba45db2 | 2674 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2675 | { |
d1a7880c PA |
2676 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2677 | /* If neither or these is defined, we can't support watchpoints. | |
2678 | This just avoids possibly failing to compile the below on such | |
2679 | systems. */ | |
c3f6f71d JM |
2680 | return 0; |
2681 | #else | |
2682 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2683 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2684 | return 0; | |
2685 | #else | |
2686 | struct { | |
37de36c6 | 2687 | procfs_ctl_t cmd; |
c3f6f71d JM |
2688 | char watch[sizeof (prwatch_t)]; |
2689 | } arg; | |
73930d4d | 2690 | prwatch_t pwatch; |
c3f6f71d | 2691 | |
9a043c1d AC |
2692 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2693 | convert a target address into something that can be stored in a | |
2694 | native data structure. */ | |
831e682e | 2695 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2696 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2697 | #else |
73930d4d | 2698 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2699 | #endif |
73930d4d KH |
2700 | pwatch.pr_size = len; |
2701 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2702 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2703 | arg.cmd = PCWATCH; | |
73930d4d | 2704 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2705 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2706 | #else | |
2707 | #if defined (PIOCSWATCH) | |
73930d4d | 2708 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2709 | #else |
2710 | return 0; /* Fail */ | |
2711 | #endif | |
2712 | #endif | |
2713 | #endif | |
2714 | #endif | |
c906108c SS |
2715 | } |
2716 | ||
965b60ee | 2717 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2718 | |
c3f6f71d | 2719 | #include <sys/sysi86.h> |
c906108c | 2720 | |
77382aee PA |
2721 | /* The KEY is actually the value of the lower 16 bits of the GS |
2722 | register for the LWP that we're interested in. Returns the | |
2723 | matching ssh struct (LDT entry). */ | |
c906108c | 2724 | |
c3f6f71d | 2725 | struct ssd * |
fba45db2 | 2726 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2727 | { |
c3f6f71d JM |
2728 | static struct ssd *ldt_entry = NULL; |
2729 | #ifdef NEW_PROC_API | |
2730 | char pathname[MAX_PROC_NAME_SIZE]; | |
2731 | struct cleanup *old_chain = NULL; | |
2732 | int fd; | |
2733 | ||
2734 | /* Allocate space for one LDT entry. | |
2735 | This alloc must persist, because we return a pointer to it. */ | |
2736 | if (ldt_entry == NULL) | |
2737 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2738 | ||
2739 | /* Open the file descriptor for the LDT table. */ | |
2740 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2741 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2742 | { |
c3f6f71d JM |
2743 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2744 | return NULL; | |
c906108c | 2745 | } |
c3f6f71d | 2746 | /* Make sure it gets closed again! */ |
004527cb | 2747 | old_chain = make_cleanup_close (fd); |
c906108c | 2748 | |
c3f6f71d JM |
2749 | /* Now 'read' thru the table, find a match and return it. */ |
2750 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2751 | { |
c3f6f71d JM |
2752 | if (ldt_entry->sel == 0 && |
2753 | ldt_entry->bo == 0 && | |
2754 | ldt_entry->acc1 == 0 && | |
2755 | ldt_entry->acc2 == 0) | |
2756 | break; /* end of table */ | |
2757 | /* If key matches, return this entry. */ | |
2758 | if (ldt_entry->sel == key) | |
2759 | return ldt_entry; | |
c906108c | 2760 | } |
c3f6f71d JM |
2761 | /* Loop ended, match not found. */ |
2762 | return NULL; | |
2763 | #else | |
2764 | int nldt, i; | |
2765 | static int nalloc = 0; | |
c906108c | 2766 | |
c3f6f71d JM |
2767 | /* Get the number of LDT entries. */ |
2768 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2769 | { |
c3f6f71d JM |
2770 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2771 | return NULL; | |
c906108c SS |
2772 | } |
2773 | ||
c3f6f71d JM |
2774 | /* Allocate space for the number of LDT entries. */ |
2775 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2776 | if (nldt > nalloc) | |
c906108c | 2777 | { |
19958708 | 2778 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2779 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2780 | nalloc = nldt; | |
2781 | } | |
19958708 | 2782 | |
c3f6f71d JM |
2783 | /* Read the whole table in one gulp. */ |
2784 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2785 | { | |
2786 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2787 | return NULL; | |
c906108c SS |
2788 | } |
2789 | ||
c3f6f71d JM |
2790 | /* Search the table and return the (first) entry matching 'key'. */ |
2791 | for (i = 0; i < nldt; i++) | |
2792 | if (ldt_entry[i].sel == key) | |
2793 | return &ldt_entry[i]; | |
c906108c | 2794 | |
c3f6f71d JM |
2795 | /* Loop ended, match not found. */ |
2796 | return NULL; | |
2797 | #endif | |
2798 | } | |
c906108c | 2799 | |
77382aee | 2800 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2801 | |
2802 | struct ssd * | |
2803 | procfs_find_LDT_entry (ptid_t ptid) | |
2804 | { | |
2805 | gdb_gregset_t *gregs; | |
2806 | int key; | |
2807 | procinfo *pi; | |
2808 | ||
2809 | /* Find procinfo for the lwp. */ | |
2810 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
2811 | { | |
0b62613e | 2812 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2813 | PIDGET (ptid), TIDGET (ptid)); |
2814 | return NULL; | |
2815 | } | |
2816 | /* get its general registers. */ | |
2817 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
2818 | { | |
0b62613e | 2819 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2820 | PIDGET (ptid), TIDGET (ptid)); |
2821 | return NULL; | |
2822 | } | |
2823 | /* Now extract the GS register's lower 16 bits. */ | |
2824 | key = (*gregs)[GS] & 0xffff; | |
2825 | ||
2826 | /* Find the matching entry and return it. */ | |
2827 | return proc_get_LDT_entry (pi, key); | |
2828 | } | |
2829 | ||
2830 | #endif | |
c906108c | 2831 | |
c3f6f71d | 2832 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2833 | |
c3f6f71d | 2834 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2835 | |
c3f6f71d JM |
2836 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2837 | since there is a different way to do threads on every OS. */ | |
c906108c | 2838 | |
77382aee | 2839 | /* Returns the number of threads for the process. */ |
c906108c | 2840 | |
c3f6f71d | 2841 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2842 | /* OSF version */ |
19958708 | 2843 | int |
fba45db2 | 2844 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2845 | { |
2846 | int nthreads = 0; | |
c906108c | 2847 | |
c3f6f71d JM |
2848 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2849 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2850 | |
c3f6f71d | 2851 | return nthreads; |
c906108c SS |
2852 | } |
2853 | ||
c3f6f71d JM |
2854 | #else |
2855 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2856 | /* Solaris and Unixware version */ |
c3f6f71d | 2857 | int |
fba45db2 | 2858 | proc_get_nthreads (procinfo *pi) |
c906108c | 2859 | { |
c3f6f71d JM |
2860 | if (!pi->status_valid) |
2861 | if (!proc_get_status (pi)) | |
2862 | return 0; | |
c5aa993b | 2863 | |
77382aee PA |
2864 | /* NEW_PROC_API: only works for the process procinfo, because the |
2865 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2866 | #ifdef NEW_PROC_API |
c3f6f71d JM |
2867 | if (pi->tid != 0) /* find the parent process procinfo */ |
2868 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2869 | #endif |
c3f6f71d | 2870 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2871 | } |
2872 | ||
c3f6f71d | 2873 | #else |
77382aee | 2874 | /* Default version */ |
c3f6f71d | 2875 | int |
fba45db2 | 2876 | proc_get_nthreads (procinfo *pi) |
c906108c | 2877 | { |
c3f6f71d JM |
2878 | return 0; |
2879 | } | |
2880 | #endif | |
2881 | #endif | |
2882 | ||
77382aee PA |
2883 | /* LWP version. |
2884 | ||
2885 | Return the ID of the thread that had an event of interest. | |
2886 | (ie. the one that hit a breakpoint or other traced event). All | |
2887 | other things being equal, this should be the ID of a thread that is | |
2888 | currently executing. */ | |
c3f6f71d JM |
2889 | |
2890 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2891 | /* Solaris and Unixware version */ |
c3f6f71d | 2892 | int |
fba45db2 | 2893 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2894 | { |
77382aee PA |
2895 | /* Note: this should be applied to the root procinfo for the |
2896 | process, not to the procinfo for an LWP. If applied to the | |
2897 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2898 | that case, find the parent process procinfo. */ | |
19958708 | 2899 | |
c3f6f71d JM |
2900 | if (pi->tid != 0) |
2901 | pi = find_procinfo_or_die (pi->pid, 0); | |
2902 | ||
2903 | if (!pi->status_valid) | |
2904 | if (!proc_get_status (pi)) | |
2905 | return 0; | |
2906 | ||
2907 | #ifdef NEW_PROC_API | |
2908 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2909 | #else |
c3f6f71d | 2910 | return pi->prstatus.pr_who; |
c906108c | 2911 | #endif |
c3f6f71d | 2912 | } |
c906108c | 2913 | |
c3f6f71d JM |
2914 | #else |
2915 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2916 | /* OSF version */ |
19958708 | 2917 | int |
fba45db2 | 2918 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
2919 | { |
2920 | #if 0 /* FIXME: not ready for prime time? */ | |
2921 | return pi->prstatus.pr_tid; | |
2922 | #else | |
2923 | return 0; | |
2924 | #endif | |
c906108c SS |
2925 | } |
2926 | ||
c3f6f71d | 2927 | #else |
77382aee | 2928 | /* Default version */ |
19958708 | 2929 | int |
fba45db2 | 2930 | proc_get_current_thread (procinfo *pi) |
c906108c | 2931 | { |
c3f6f71d JM |
2932 | return 0; |
2933 | } | |
2934 | ||
2935 | #endif | |
2936 | #endif | |
c906108c | 2937 | |
77382aee PA |
2938 | /* Discover the IDs of all the threads within the process, and create |
2939 | a procinfo for each of them (chained to the parent). This | |
2940 | unfortunately requires a different method on every OS. Returns | |
2941 | non-zero for success, zero for failure. */ | |
c906108c | 2942 | |
c3f6f71d | 2943 | int |
fba45db2 | 2944 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2945 | { |
2946 | if (thread && parent) /* sanity */ | |
c906108c | 2947 | { |
c3f6f71d JM |
2948 | thread->status_valid = 0; |
2949 | if (!proc_get_status (thread)) | |
2950 | destroy_one_procinfo (&parent->thread_list, thread); | |
2951 | } | |
2952 | return 0; /* keep iterating */ | |
2953 | } | |
c5aa993b | 2954 | |
c3f6f71d | 2955 | #if defined (PIOCLSTATUS) |
77382aee | 2956 | /* Solaris 2.5 (ioctl) version */ |
c3f6f71d | 2957 | int |
fba45db2 | 2958 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2959 | { |
2960 | gdb_prstatus_t *prstatus; | |
2961 | struct cleanup *old_chain = NULL; | |
2962 | procinfo *thread; | |
2963 | int nlwp, i; | |
2964 | ||
77382aee PA |
2965 | /* We should never have to apply this operation to any procinfo |
2966 | except the one for the main process. If that ever changes for | |
2967 | any reason, then take out the following clause and replace it | |
2968 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2969 | |
c3f6f71d JM |
2970 | if (pi->tid != 0) |
2971 | pi = find_procinfo_or_die (pi->pid, 0); | |
2972 | ||
2973 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2974 | ||
2975 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2976 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2977 | ||
3c37485b | 2978 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2979 | |
b8c9b27d | 2980 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2981 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2982 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2983 | ||
77382aee | 2984 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2985 | for (i = 1; i < nlwp + 1; i++) |
2986 | { | |
2987 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2988 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2989 | |
c3f6f71d JM |
2990 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2991 | thread->status_valid = 1; | |
2992 | } | |
2993 | pi->threads_valid = 1; | |
2994 | do_cleanups (old_chain); | |
2995 | return 1; | |
2996 | } | |
2997 | #else | |
2998 | #ifdef NEW_PROC_API | |
77382aee | 2999 | /* Unixware and Solaris 6 (and later) version */ |
004527cb AC |
3000 | static void |
3001 | do_closedir_cleanup (void *dir) | |
3002 | { | |
3003 | closedir (dir); | |
3004 | } | |
3005 | ||
c3f6f71d | 3006 | int |
fba45db2 | 3007 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3008 | { |
3009 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3010 | struct dirent *direntry; | |
3011 | struct cleanup *old_chain = NULL; | |
3012 | procinfo *thread; | |
3013 | DIR *dirp; | |
3014 | int lwpid; | |
3015 | ||
77382aee PA |
3016 | /* We should never have to apply this operation to any procinfo |
3017 | except the one for the main process. If that ever changes for | |
3018 | any reason, then take out the following clause and replace it | |
3019 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3020 | |
c3f6f71d JM |
3021 | if (pi->tid != 0) |
3022 | pi = find_procinfo_or_die (pi->pid, 0); | |
3023 | ||
3024 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3025 | ||
77382aee PA |
3026 | /* Unixware |
3027 | ||
3028 | Note: this brute-force method is the only way I know of to | |
3029 | accomplish this task on Unixware. This method will also work on | |
3030 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
3031 | way to do this on Solaris, but the margins of this manuscript are | |
3032 | too small to write it here... ;-) */ | |
c3f6f71d JM |
3033 | |
3034 | strcpy (pathname, pi->pathname); | |
3035 | strcat (pathname, "/lwp"); | |
3036 | if ((dirp = opendir (pathname)) == NULL) | |
3037 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3038 | ||
004527cb | 3039 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3040 | while ((direntry = readdir (dirp)) != NULL) |
3041 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3042 | { | |
3043 | lwpid = atoi (&direntry->d_name[0]); | |
3044 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3045 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3046 | } | |
3047 | pi->threads_valid = 1; | |
3048 | do_cleanups (old_chain); | |
3049 | return 1; | |
3050 | } | |
3051 | #else | |
3052 | #ifdef PIOCTLIST | |
77382aee | 3053 | /* OSF version */ |
19958708 | 3054 | int |
fba45db2 | 3055 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3056 | { |
3057 | int nthreads, i; | |
3058 | tid_t *threads; | |
3059 | ||
77382aee PA |
3060 | /* We should never have to apply this operation to any procinfo |
3061 | except the one for the main process. If that ever changes for | |
3062 | any reason, then take out the following clause and replace it | |
3063 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3064 | |
c3f6f71d JM |
3065 | if (pi->tid != 0) |
3066 | pi = find_procinfo_or_die (pi->pid, 0); | |
3067 | ||
3068 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3069 | ||
3070 | nthreads = proc_get_nthreads (pi); | |
3071 | if (nthreads < 2) | |
3072 | return 0; /* nothing to do for 1 or fewer threads */ | |
3073 | ||
3c37485b | 3074 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3075 | |
c3f6f71d JM |
3076 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3077 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3078 | ||
3079 | for (i = 0; i < nthreads; i++) | |
3080 | { | |
3081 | if (!find_procinfo (pi->pid, threads[i])) | |
3082 | if (!create_procinfo (pi->pid, threads[i])) | |
3083 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3084 | } |
c3f6f71d JM |
3085 | pi->threads_valid = 1; |
3086 | return 1; | |
c906108c | 3087 | } |
c3f6f71d | 3088 | #else |
77382aee | 3089 | /* Default version */ |
c3f6f71d | 3090 | int |
fba45db2 | 3091 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3092 | { |
3093 | return 0; | |
3094 | } | |
3095 | #endif /* OSF PIOCTLIST */ | |
3096 | #endif /* NEW_PROC_API */ | |
3097 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3098 | |
77382aee PA |
3099 | /* Given a pointer to a function, call that function once for each lwp |
3100 | in the procinfo list, until the function returns non-zero, in which | |
3101 | event return the value returned by the function. | |
3102 | ||
3103 | Note: this function does NOT call update_threads. If you want to | |
3104 | discover new threads first, you must call that function explicitly. | |
3105 | This function just makes a quick pass over the currently-known | |
3106 | procinfos. | |
3107 | ||
3108 | PI is the parent process procinfo. FUNC is the per-thread | |
3109 | function. PTR is an opaque parameter for function. Returns the | |
3110 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d JM |
3111 | |
3112 | int | |
d0849a9a KB |
3113 | proc_iterate_over_threads (procinfo *pi, |
3114 | int (*func) (procinfo *, procinfo *, void *), | |
3115 | void *ptr) | |
c906108c | 3116 | { |
c3f6f71d JM |
3117 | procinfo *thread, *next; |
3118 | int retval = 0; | |
c906108c | 3119 | |
77382aee PA |
3120 | /* We should never have to apply this operation to any procinfo |
3121 | except the one for the main process. If that ever changes for | |
3122 | any reason, then take out the following clause and replace it | |
3123 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3124 | |
c3f6f71d JM |
3125 | if (pi->tid != 0) |
3126 | pi = find_procinfo_or_die (pi->pid, 0); | |
3127 | ||
3128 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3129 | { |
c3f6f71d JM |
3130 | next = thread->next; /* in case thread is destroyed */ |
3131 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3132 | break; | |
c906108c | 3133 | } |
c3f6f71d JM |
3134 | |
3135 | return retval; | |
c906108c SS |
3136 | } |
3137 | ||
c3f6f71d JM |
3138 | /* =================== END, Thread "MODULE" =================== */ |
3139 | ||
3140 | /* =================== END, /proc "MODULE" =================== */ | |
3141 | ||
3142 | /* =================== GDB "MODULE" =================== */ | |
3143 | ||
77382aee PA |
3144 | /* Here are all of the gdb target vector functions and their |
3145 | friends. */ | |
c3f6f71d | 3146 | |
39f77062 | 3147 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3148 | static void do_detach (int signo); |
37de36c6 | 3149 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce | 3150 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 3151 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
3152 | |
3153 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3154 | the startup phase. The following two variables are used to record | |
3155 | the address of the breakpoint, and the code that was replaced by | |
3156 | a breakpoint. */ | |
3157 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3158 | static void *dbx_link_bpt; |
c3f6f71d | 3159 | |
77382aee PA |
3160 | /* Sets up the inferior to be debugged. Registers to trace signals, |
3161 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
3162 | may want to customize that. Returns zero for success (note! | |
3163 | unlike most functions in this module); on failure, returns the LINE | |
3164 | NUMBER where it failed! */ | |
c3f6f71d JM |
3165 | |
3166 | static int | |
fba45db2 | 3167 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3168 | { |
c3f6f71d | 3169 | fltset_t traced_faults; |
37de36c6 KB |
3170 | gdb_sigset_t traced_signals; |
3171 | sysset_t *traced_syscall_entries; | |
3172 | sysset_t *traced_syscall_exits; | |
3173 | int status; | |
c906108c | 3174 | |
c3f6f71d JM |
3175 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3176 | /* On some systems (OSF), we don't trace hardware faults. | |
3177 | Apparently it's enough that we catch them as signals. | |
3178 | Wonder why we don't just do that in general? */ | |
3179 | premptyset (&traced_faults); /* don't trace faults. */ | |
3180 | #else | |
3181 | /* Register to trace hardware faults in the child. */ | |
3182 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3183 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3184 | #endif |
3185 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3186 | return __LINE__; | |
c906108c | 3187 | |
c3f6f71d JM |
3188 | /* Register to trace selected signals in the child. */ |
3189 | premptyset (&traced_signals); | |
3190 | if (!register_gdb_signals (pi, &traced_signals)) | |
3191 | return __LINE__; | |
3192 | ||
37de36c6 | 3193 | |
c3f6f71d | 3194 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3195 | traced_syscall_entries = sysset_t_alloc (pi); |
3196 | gdb_premptysysset (traced_syscall_entries); | |
3197 | #ifdef SYS_exit | |
3198 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3199 | #endif | |
c3f6f71d | 3200 | #ifdef SYS_lwpexit |
37de36c6 | 3201 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3202 | #endif |
3203 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3204 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3205 | #endif | |
3206 | #ifdef DYNAMIC_SYSCALLS | |
3207 | { | |
3208 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 3209 | |
37de36c6 KB |
3210 | if (callnum >= 0) |
3211 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3212 | } | |
c906108c SS |
3213 | #endif |
3214 | ||
37de36c6 KB |
3215 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3216 | xfree (traced_syscall_entries); | |
3217 | if (!status) | |
c3f6f71d JM |
3218 | return __LINE__; |
3219 | ||
3220 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3221 | /* OSF method for tracing exec syscalls. Quoting: | |
3222 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3223 | exits from exec system calls because of the user level loader. */ | |
3224 | /* FIXME: make nice and maybe move into an access function. */ | |
3225 | { | |
3226 | int prfs_flags; | |
3227 | ||
3228 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3229 | return __LINE__; | |
3230 | ||
3231 | prfs_flags |= PRFS_STOPEXEC; | |
3232 | ||
3233 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3234 | return __LINE__; | |
3235 | } | |
3236 | #else /* not PRFS_STOPEXEC */ | |
3237 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3238 | /* GW: Rationale... | |
3239 | Not all systems with /proc have all the exec* syscalls with the same | |
3240 | names. On the SGI, for example, there is no SYS_exec, but there | |
3241 | *is* a SYS_execv. So, we try to account for that. */ | |
3242 | ||
37de36c6 KB |
3243 | traced_syscall_exits = sysset_t_alloc (pi); |
3244 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3245 | #ifdef SYS_exec |
37de36c6 | 3246 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3247 | #endif |
3248 | #ifdef SYS_execve | |
37de36c6 | 3249 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3250 | #endif |
3251 | #ifdef SYS_execv | |
37de36c6 | 3252 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3253 | #endif |
c5aa993b | 3254 | |
c3f6f71d | 3255 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3256 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3257 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3258 | #endif |
c5aa993b | 3259 | |
c3f6f71d | 3260 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3261 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3262 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3263 | #endif |
c5aa993b | 3264 | |
37de36c6 KB |
3265 | #ifdef DYNAMIC_SYSCALLS |
3266 | { | |
3267 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3268 | |
37de36c6 KB |
3269 | if (callnum >= 0) |
3270 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3271 | callnum = find_syscall (pi, "ra_execve"); | |
3272 | if (callnum >= 0) | |
3273 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3274 | } | |
3275 | #endif | |
c906108c | 3276 | |
37de36c6 KB |
3277 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3278 | xfree (traced_syscall_exits); | |
3279 | if (!status) | |
c3f6f71d JM |
3280 | return __LINE__; |
3281 | ||
3282 | #endif /* PRFS_STOPEXEC */ | |
3283 | return 0; | |
c906108c SS |
3284 | } |
3285 | ||
19958708 | 3286 | static void |
136d6dae | 3287 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3288 | { |
c3f6f71d JM |
3289 | char *exec_file; |
3290 | int pid; | |
3291 | ||
74164c56 | 3292 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3293 | |
c3f6f71d | 3294 | if (pid == getpid ()) |
8a3fe4f8 | 3295 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3296 | |
c3f6f71d | 3297 | if (from_tty) |
c906108c | 3298 | { |
c3f6f71d JM |
3299 | exec_file = get_exec_file (0); |
3300 | ||
3301 | if (exec_file) | |
a3f17187 | 3302 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3303 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3304 | else |
a3f17187 | 3305 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3306 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3307 | |
3308 | fflush (stdout); | |
c906108c | 3309 | } |
39f77062 | 3310 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3311 | push_target (ops); |
c3f6f71d JM |
3312 | } |
3313 | ||
19958708 | 3314 | static void |
136d6dae | 3315 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3316 | { |
cc377e6b | 3317 | int sig = 0; |
7f9f62ba | 3318 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3319 | |
3320 | if (args) | |
3321 | sig = atoi (args); | |
c3f6f71d JM |
3322 | |
3323 | if (from_tty) | |
c906108c | 3324 | { |
cc377e6b MK |
3325 | char *exec_file; |
3326 | ||
c3f6f71d | 3327 | exec_file = get_exec_file (0); |
cc377e6b | 3328 | if (exec_file == NULL) |
c3f6f71d | 3329 | exec_file = ""; |
cc377e6b | 3330 | |
a3f17187 | 3331 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3332 | target_pid_to_str (pid_to_ptid (pid))); |
3333 | gdb_flush (gdb_stdout); | |
c906108c | 3334 | } |
19958708 | 3335 | |
cc377e6b MK |
3336 | do_detach (sig); |
3337 | ||
39f77062 | 3338 | inferior_ptid = null_ptid; |
7f9f62ba | 3339 | detach_inferior (pid); |
28439f5e | 3340 | unpush_target (ops); |
c906108c SS |
3341 | } |
3342 | ||
39f77062 KB |
3343 | static ptid_t |
3344 | do_attach (ptid_t ptid) | |
c906108c | 3345 | { |
c3f6f71d | 3346 | procinfo *pi; |
181e7f93 | 3347 | struct inferior *inf; |
c3f6f71d | 3348 | int fail; |
2689673f | 3349 | int lwpid; |
c3f6f71d | 3350 | |
39f77062 | 3351 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3352 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3353 | |
3354 | if (!open_procinfo_files (pi, FD_CTL)) | |
3355 | { | |
3356 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3357 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3358 | PIDGET (ptid)); |
c3f6f71d JM |
3359 | dead_procinfo (pi, errmsg, NOKILL); |
3360 | } | |
c906108c | 3361 | |
c3f6f71d JM |
3362 | /* Stop the process (if it isn't already stopped). */ |
3363 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3364 | { |
c3f6f71d JM |
3365 | pi->was_stopped = 1; |
3366 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3367 | } |
3368 | else | |
3369 | { | |
c3f6f71d JM |
3370 | pi->was_stopped = 0; |
3371 | /* Set the process to run again when we close it. */ | |
3372 | if (!proc_set_run_on_last_close (pi)) | |
3373 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3374 | ||
3375 | /* Now stop the process. */ | |
3376 | if (!proc_stop_process (pi)) | |
3377 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3378 | pi->ignore_next_sigstop = 1; | |
c906108c | 3379 | } |
c3f6f71d JM |
3380 | /* Save some of the /proc state to be restored if we detach. */ |
3381 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3382 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3383 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3384 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3385 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3386 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3387 | NOKILL); | |
37de36c6 | 3388 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3389 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3390 | NOKILL); |
3391 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3392 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3393 | ||
3394 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3395 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3396 | ||
6c95b8df PA |
3397 | inf = current_inferior (); |
3398 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3399 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3400 | inf->attach_flag = 1; |
2689673f PA |
3401 | |
3402 | /* Create a procinfo for the current lwp. */ | |
3403 | lwpid = proc_get_current_thread (pi); | |
3404 | create_procinfo (pi->pid, lwpid); | |
3405 | ||
3406 | /* Add it to gdb's thread list. */ | |
3407 | ptid = MERGEPID (pi->pid, lwpid); | |
3408 | add_thread (ptid); | |
3409 | ||
3410 | return ptid; | |
c906108c SS |
3411 | } |
3412 | ||
3413 | static void | |
fba45db2 | 3414 | do_detach (int signo) |
c906108c | 3415 | { |
c3f6f71d | 3416 | procinfo *pi; |
c906108c | 3417 | |
c3f6f71d | 3418 | /* Find procinfo for the main process */ |
39f77062 | 3419 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3420 | if (signo) |
3421 | if (!proc_set_current_signal (pi, signo)) | |
3422 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3423 | |
c3f6f71d JM |
3424 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3425 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3426 | |
c3f6f71d JM |
3427 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3428 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3429 | ||
37de36c6 | 3430 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3431 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3432 | ||
37de36c6 | 3433 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3434 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3435 | ||
3436 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3437 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3438 | ||
3439 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3440 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3441 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3442 | { |
3443 | /* Clear any pending signal. */ | |
3444 | if (!proc_clear_current_fault (pi)) | |
3445 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3446 | ||
1a303dec MS |
3447 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3448 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3449 | ||
c3f6f71d JM |
3450 | if (!proc_set_run_on_last_close (pi)) |
3451 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3452 | } | |
3453 | ||
c3f6f71d | 3454 | destroy_procinfo (pi); |
c906108c SS |
3455 | } |
3456 | ||
772cf8be MK |
3457 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3458 | for all registers. | |
3459 | ||
3460 | ??? Is the following note still relevant? We can't get individual | |
3461 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3462 | don't bother with caching at all in that case. | |
3463 | ||
3464 | NOTE: Since the /proc interface cannot give us individual | |
3465 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3466 | This results in the possibility that we will do unnecessarily many | |
3467 | fetches, since we may be called repeatedly for individual | |
3468 | registers. So we cache the results, and mark the cache invalid | |
3469 | when the process is resumed. */ | |
c3f6f71d | 3470 | |
c906108c | 3471 | static void |
28439f5e PA |
3472 | procfs_fetch_registers (struct target_ops *ops, |
3473 | struct regcache *regcache, int regnum) | |
c906108c | 3474 | { |
772cf8be MK |
3475 | gdb_gregset_t *gregs; |
3476 | procinfo *pi; | |
3477 | int pid = PIDGET (inferior_ptid); | |
3478 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3479 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3480 | |
2689673f | 3481 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3482 | |
3483 | if (pi == NULL) | |
8a3fe4f8 | 3484 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3485 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3486 | |
772cf8be MK |
3487 | gregs = proc_get_gregs (pi); |
3488 | if (gregs == NULL) | |
c3f6f71d JM |
3489 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3490 | ||
56be3814 | 3491 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3492 | |
40a6adc1 | 3493 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3494 | { |
772cf8be MK |
3495 | gdb_fpregset_t *fpregs; |
3496 | ||
40a6adc1 MD |
3497 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3498 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3499 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3500 | return; /* Not a floating point register. */ |
c5aa993b | 3501 | |
772cf8be MK |
3502 | fpregs = proc_get_fpregs (pi); |
3503 | if (fpregs == NULL) | |
60054393 | 3504 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3505 | |
56be3814 | 3506 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3507 | } |
c906108c SS |
3508 | } |
3509 | ||
772cf8be MK |
3510 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3511 | this for all registers. | |
3512 | ||
3513 | NOTE: Since the /proc interface will not read individual registers, | |
3514 | we will cache these requests until the process is resumed, and only | |
3515 | then write them back to the inferior process. | |
77382aee | 3516 | |
772cf8be MK |
3517 | FIXME: is that a really bad idea? Have to think about cases where |
3518 | writing one register might affect the value of others, etc. */ | |
c906108c | 3519 | |
c3f6f71d | 3520 | static void |
28439f5e PA |
3521 | procfs_store_registers (struct target_ops *ops, |
3522 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3523 | { |
772cf8be MK |
3524 | gdb_gregset_t *gregs; |
3525 | procinfo *pi; | |
3526 | int pid = PIDGET (inferior_ptid); | |
3527 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3528 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3529 | |
2689673f | 3530 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3531 | |
3532 | if (pi == NULL) | |
8a3fe4f8 | 3533 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3534 | target_pid_to_str (inferior_ptid)); |
c906108c | 3535 | |
772cf8be MK |
3536 | gregs = proc_get_gregs (pi); |
3537 | if (gregs == NULL) | |
c3f6f71d | 3538 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3539 | |
56be3814 | 3540 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3541 | if (!proc_set_gregs (pi)) |
3542 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3543 | |
40a6adc1 | 3544 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3545 | { |
772cf8be MK |
3546 | gdb_fpregset_t *fpregs; |
3547 | ||
40a6adc1 MD |
3548 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3549 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3550 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3551 | return; /* Not a floating point register. */ |
60054393 | 3552 | |
772cf8be MK |
3553 | fpregs = proc_get_fpregs (pi); |
3554 | if (fpregs == NULL) | |
60054393 MS |
3555 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3556 | ||
56be3814 | 3557 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3558 | if (!proc_set_fpregs (pi)) |
3559 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3560 | } | |
c3f6f71d | 3561 | } |
c906108c | 3562 | |
37de36c6 KB |
3563 | static int |
3564 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3565 | { | |
37de36c6 KB |
3566 | #ifdef SYS_lwp_exit |
3567 | if (scall == SYS_lwp_exit) | |
3568 | return 1; | |
3569 | #endif | |
3570 | #ifdef SYS_lwpexit | |
3571 | if (scall == SYS_lwpexit) | |
3572 | return 1; | |
3573 | #endif | |
3574 | return 0; | |
3575 | } | |
3576 | ||
3577 | static int | |
3578 | syscall_is_exit (procinfo *pi, int scall) | |
3579 | { | |
3580 | #ifdef SYS_exit | |
3581 | if (scall == SYS_exit) | |
3582 | return 1; | |
3583 | #endif | |
3584 | #ifdef DYNAMIC_SYSCALLS | |
3585 | if (find_syscall (pi, "_exit") == scall) | |
3586 | return 1; | |
3587 | #endif | |
3588 | return 0; | |
3589 | } | |
3590 | ||
3591 | static int | |
3592 | syscall_is_exec (procinfo *pi, int scall) | |
3593 | { | |
3594 | #ifdef SYS_exec | |
3595 | if (scall == SYS_exec) | |
3596 | return 1; | |
3597 | #endif | |
3598 | #ifdef SYS_execv | |
3599 | if (scall == SYS_execv) | |
3600 | return 1; | |
3601 | #endif | |
3602 | #ifdef SYS_execve | |
3603 | if (scall == SYS_execve) | |
3604 | return 1; | |
3605 | #endif | |
3606 | #ifdef DYNAMIC_SYSCALLS | |
3607 | if (find_syscall (pi, "_execve")) | |
3608 | return 1; | |
3609 | if (find_syscall (pi, "ra_execve")) | |
3610 | return 1; | |
3611 | #endif | |
3612 | return 0; | |
3613 | } | |
3614 | ||
3615 | static int | |
3616 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3617 | { | |
3618 | #ifdef SYS_lwp_create | |
3619 | if (scall == SYS_lwp_create) | |
3620 | return 1; | |
3621 | #endif | |
3622 | #ifdef SYS_lwpcreate | |
3623 | if (scall == SYS_lwpcreate) | |
3624 | return 1; | |
3625 | #endif | |
3626 | return 0; | |
3627 | } | |
3628 | ||
7434dadd JB |
3629 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3630 | Does nothing if the breakpoint hasn't been inserted or has already | |
3631 | been removed. */ | |
3632 | ||
3633 | static void | |
3634 | remove_dbx_link_breakpoint (void) | |
3635 | { | |
3636 | if (dbx_link_bpt_addr == 0) | |
3637 | return; | |
3638 | ||
3639 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3640 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3641 | ||
3642 | dbx_link_bpt_addr = 0; | |
3643 | dbx_link_bpt = NULL; | |
3644 | } | |
3645 | ||
3646 | #ifdef SYS_syssgi | |
3647 | /* Return the address of the __dbx_link() function in the file | |
3648 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3649 | the symbol was not found. */ | |
3650 | ||
3651 | static CORE_ADDR | |
3652 | dbx_link_addr (bfd *abfd) | |
3653 | { | |
3654 | long storage_needed; | |
3655 | asymbol **symbol_table; | |
3656 | long number_of_symbols; | |
3657 | long i; | |
3658 | ||
3659 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3660 | if (storage_needed <= 0) | |
3661 | return 0; | |
3662 | ||
3663 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3664 | make_cleanup (xfree, symbol_table); | |
3665 | ||
3666 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3667 | ||
3668 | for (i = 0; i < number_of_symbols; i++) | |
3669 | { | |
3670 | asymbol *sym = symbol_table[i]; | |
3671 | ||
3672 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3673 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3674 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3675 | } |
3676 | ||
3677 | /* Symbol not found, return NULL. */ | |
3678 | return 0; | |
3679 | } | |
3680 | ||
3681 | /* Search the symbol table of the file referenced by FD for a symbol | |
3682 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
3683 | and return nonzero. Return zero otherwise. */ | |
3684 | ||
3685 | static int | |
3686 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3687 | { | |
3688 | bfd *abfd; | |
3689 | long storage_needed; | |
3690 | CORE_ADDR sym_addr; | |
3691 | ||
3692 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
3693 | if (abfd == NULL) | |
3694 | { | |
3695 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3696 | return 0; | |
3697 | } | |
3698 | ||
3699 | if (!bfd_check_format (abfd, bfd_object)) | |
3700 | { | |
3701 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3702 | symbol in it. */ |
7434dadd JB |
3703 | bfd_close (abfd); |
3704 | return 0; | |
3705 | } | |
3706 | ||
3707 | sym_addr = dbx_link_addr (abfd); | |
3708 | if (sym_addr != 0) | |
3709 | { | |
3710 | /* Insert the breakpoint. */ | |
3711 | dbx_link_bpt_addr = sym_addr; | |
3712 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3713 | sym_addr); | |
3714 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3715 | { |
3716 | warning (_("Failed to insert dbx_link breakpoint.")); | |
3717 | bfd_close (abfd); | |
3718 | return 0; | |
3719 | } | |
7434dadd JB |
3720 | bfd_close (abfd); |
3721 | return 1; | |
3722 | } | |
3723 | ||
3724 | bfd_close (abfd); | |
3725 | return 0; | |
3726 | } | |
3727 | ||
e294797a | 3728 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3729 | space in the process. The callback function receives an open file |
3730 | descriptor for the file corresponding to that mapped address space | |
3731 | (if there is one), and the base address of the mapped space. Quit | |
3732 | when the callback function returns a nonzero value, or at teh end | |
3733 | of the mappings. Returns the first non-zero return value of the | |
3734 | callback function, or zero. */ | |
e294797a JB |
3735 | |
3736 | static int | |
3737 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3738 | void *data) | |
3739 | { | |
3740 | procinfo *pi = data; | |
3741 | int fd; | |
3742 | ||
3743 | #ifdef NEW_PROC_API | |
3744 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3745 | ||
3746 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3747 | return -1; /* sanity */ | |
3748 | ||
3749 | if (map->pr_mapname[0] == 0) | |
3750 | { | |
3751 | fd = -1; /* no map file */ | |
3752 | } | |
3753 | else | |
3754 | { | |
3755 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3756 | /* Note: caller's responsibility to close this fd! */ | |
3757 | fd = open_with_retry (name, O_RDONLY); | |
3758 | /* Note: we don't test the above call for failure; | |
3759 | we just pass the FD on as given. Sometimes there is | |
3760 | no file, so the open may return failure, but that's | |
3761 | not a problem. */ | |
3762 | } | |
3763 | #else | |
3764 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3765 | /* Note: we don't test the above call for failure; | |
3766 | we just pass the FD on as given. Sometimes there is | |
3767 | no file, so the ioctl may return failure, but that's | |
3768 | not a problem. */ | |
3769 | #endif | |
3770 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3771 | } | |
3772 | ||
7434dadd JB |
3773 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3774 | insert a breakpoint at this location and return nonzero. Return | |
3775 | zero otherwise. */ | |
3776 | ||
3777 | static int | |
3778 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3779 | find_memory_region_ftype child_func, |
77382aee | 3780 | void *data) |
7434dadd JB |
3781 | { |
3782 | procinfo *pi = (procinfo *) data; | |
3783 | ||
3784 | /* We know the symbol we're looking for is in a text region, so | |
3785 | only look for it if the region is a text one. */ | |
3786 | if (map->pr_mflags & MA_EXEC) | |
3787 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3788 | ||
3789 | return 0; | |
3790 | } | |
3791 | ||
3792 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3793 | insert a breakpoint at its location, and return nonzero. Return zero | |
3794 | otherwise. */ | |
3795 | ||
3796 | static int | |
3797 | insert_dbx_link_breakpoint (procinfo *pi) | |
3798 | { | |
3799 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3800 | } | |
3801 | #endif | |
3802 | ||
77382aee PA |
3803 | /* Retrieve the next stop event from the child process. If child has |
3804 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3805 | (or possibly wait eventcodes) into gdb internal event codes. | |
3806 | Returns the id of process (and possibly thread) that incurred the | |
3807 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3808 | |
39f77062 | 3809 | static ptid_t |
117de6a9 | 3810 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3811 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3812 | { |
c3f6f71d JM |
3813 | /* First cut: loosely based on original version 2.1 */ |
3814 | procinfo *pi; | |
39f77062 KB |
3815 | int wstat; |
3816 | int temp_tid; | |
3817 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3818 | int why, what, flags; |
3819 | int retry = 0; | |
c906108c | 3820 | |
c3f6f71d | 3821 | wait_again: |
c906108c | 3822 | |
c3f6f71d JM |
3823 | retry++; |
3824 | wstat = 0; | |
39f77062 | 3825 | retval = pid_to_ptid (-1); |
c906108c | 3826 | |
c3f6f71d | 3827 | /* Find procinfo for main process */ |
39f77062 | 3828 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3829 | if (pi) |
c906108c | 3830 | { |
c3f6f71d JM |
3831 | /* We must assume that the status is stale now... */ |
3832 | pi->status_valid = 0; | |
3833 | pi->gregs_valid = 0; | |
3834 | pi->fpregs_valid = 0; | |
3835 | ||
3836 | #if 0 /* just try this out... */ | |
3837 | flags = proc_flags (pi); | |
3838 | why = proc_why (pi); | |
3839 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3840 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3841 | #endif | |
3842 | /* If child is not stopped, wait for it to stop. */ | |
3843 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3844 | !proc_wait_for_stop (pi)) | |
c906108c | 3845 | { |
c3f6f71d JM |
3846 | /* wait_for_stop failed: has the child terminated? */ |
3847 | if (errno == ENOENT) | |
c906108c | 3848 | { |
39f77062 KB |
3849 | int wait_retval; |
3850 | ||
c3f6f71d | 3851 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3852 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3853 | |
39f77062 | 3854 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 3855 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 3856 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3857 | /* FIXME: might I not just use waitpid? |
3858 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3859 | retval = pid_to_ptid (wait_retval); |
c906108c | 3860 | } |
d1566ff5 FN |
3861 | else if (errno == EINTR) |
3862 | goto wait_again; | |
c3f6f71d | 3863 | else |
c906108c | 3864 | { |
c3f6f71d JM |
3865 | /* Unknown error from wait_for_stop. */ |
3866 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3867 | } |
c3f6f71d JM |
3868 | } |
3869 | else | |
3870 | { | |
3871 | /* This long block is reached if either: | |
3872 | a) the child was already stopped, or | |
3873 | b) we successfully waited for the child with wait_for_stop. | |
3874 | This block will analyze the /proc status, and translate it | |
3875 | into a waitstatus for GDB. | |
3876 | ||
3877 | If we actually had to call wait because the /proc file | |
19958708 | 3878 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3879 | because we already have a waitstatus. */ |
3880 | ||
3881 | flags = proc_flags (pi); | |
3882 | why = proc_why (pi); | |
3883 | what = proc_what (pi); | |
3884 | ||
c3f6f71d | 3885 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3886 | { |
c3f6f71d JM |
3887 | #ifdef PR_ASYNC |
3888 | /* If it's running async (for single_thread control), | |
3889 | set it back to normal again. */ | |
3890 | if (flags & PR_ASYNC) | |
3891 | if (!proc_unset_async (pi)) | |
3892 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3893 | #endif | |
3894 | ||
3895 | if (info_verbose) | |
3896 | proc_prettyprint_why (why, what, 1); | |
3897 | ||
3898 | /* The 'pid' we will return to GDB is composed of | |
3899 | the process ID plus the lwp ID. */ | |
3900 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3901 | ||
3902 | switch (why) { | |
3903 | case PR_SIGNALLED: | |
3904 | wstat = (what << 8) | 0177; | |
3905 | break; | |
3906 | case PR_SYSENTRY: | |
37de36c6 | 3907 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3908 | { |
17faa917 DJ |
3909 | if (print_thread_events) |
3910 | printf_unfiltered (_("[%s exited]\n"), | |
3911 | target_pid_to_str (retval)); | |
37de36c6 KB |
3912 | delete_thread (retval); |
3913 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3914 | return retval; | |
3915 | } | |
3916 | else if (syscall_is_exit (pi, what)) | |
3917 | { | |
181e7f93 PA |
3918 | struct inferior *inf; |
3919 | ||
37de36c6 KB |
3920 | /* Handle SYS_exit call only */ |
3921 | /* Stopped at entry to SYS_exit. | |
19958708 | 3922 | Make it runnable, resume it, then use |
37de36c6 | 3923 | the wait system call to get its exit code. |
19958708 | 3924 | Proc_run_process always clears the current |
37de36c6 KB |
3925 | fault and signal. |
3926 | Then return its exit status. */ | |
3927 | pi->status_valid = 0; | |
3928 | wstat = 0; | |
19958708 | 3929 | /* FIXME: what we should do is return |
37de36c6 KB |
3930 | TARGET_WAITKIND_SPURIOUS. */ |
3931 | if (!proc_run_process (pi, 0, 0)) | |
3932 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3933 | |
3934 | inf = find_inferior_pid (pi->pid); | |
3935 | if (inf->attach_flag) | |
c3f6f71d | 3936 | { |
19958708 | 3937 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3938 | return a "success" exit code. Bogus: what if |
3939 | it returns something else? */ | |
3940 | wstat = 0; | |
39f77062 | 3941 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3942 | } |
3943 | else | |
3944 | { | |
3945 | int temp = wait (&wstat); | |
3946 | ||
3947 | /* FIXME: shouldn't I make sure I get the right | |
3948 | event from the right process? If (for | |
3949 | instance) I have killed an earlier inferior | |
3950 | process but failed to clean up after it | |
3951 | somehow, I could get its termination event | |
3952 | here. */ | |
3953 | ||
3954 | /* If wait returns -1, that's what we return to GDB. */ | |
3955 | if (temp < 0) | |
39f77062 | 3956 | retval = pid_to_ptid (temp); |
c3f6f71d | 3957 | } |
c3f6f71d | 3958 | } |
37de36c6 KB |
3959 | else |
3960 | { | |
a3f17187 | 3961 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3962 | proc_prettyprint_syscall (proc_what (pi), 0); |
3963 | printf_filtered ("\n"); | |
3964 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3965 | { |
37de36c6 | 3966 | long i, nsysargs, *sysargs; |
c3f6f71d | 3967 | |
37de36c6 KB |
3968 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3969 | (sysargs = proc_sysargs (pi)) != NULL) | |
3970 | { | |
a3f17187 | 3971 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 3972 | for (i = 0; i < nsysargs; i++) |
19958708 | 3973 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3974 | i, sysargs[i]); |
3975 | } | |
c3f6f71d | 3976 | |
c3f6f71d | 3977 | } |
c3f6f71d | 3978 | #endif |
37de36c6 KB |
3979 | if (status) |
3980 | { | |
3981 | /* How to exit gracefully, returning "unknown event" */ | |
3982 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 3983 | return inferior_ptid; |
37de36c6 KB |
3984 | } |
3985 | else | |
3986 | { | |
3987 | /* How to keep going without returning to wfi: */ | |
39f77062 | 3988 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
3989 | goto wait_again; |
3990 | } | |
3991 | } | |
3992 | break; | |
3993 | case PR_SYSEXIT: | |
3994 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3995 | { |
37de36c6 KB |
3996 | /* Hopefully this is our own "fork-child" execing |
3997 | the real child. Hoax this event into a trap, and | |
3998 | GDB will see the child about to execute its start | |
3999 | address. */ | |
4000 | wstat = (SIGTRAP << 8) | 0177; | |
4001 | } | |
9185ddce | 4002 | #ifdef SYS_syssgi |
77382aee PA |
4003 | else if (what == SYS_syssgi) |
4004 | { | |
4005 | /* see if we can break on dbx_link(). If yes, then | |
4006 | we no longer need the SYS_syssgi notifications. */ | |
4007 | if (insert_dbx_link_breakpoint (pi)) | |
4008 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4009 | FLAG_RESET, 0); | |
4010 | ||
4011 | /* This is an internal event and should be transparent | |
4012 | to wfi, so resume the execution and wait again. See | |
4013 | comment in procfs_init_inferior() for more details. */ | |
4014 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4015 | goto wait_again; | |
4016 | } | |
9185ddce | 4017 | #endif |
37de36c6 KB |
4018 | else if (syscall_is_lwp_create (pi, what)) |
4019 | { | |
77382aee PA |
4020 | /* This syscall is somewhat like fork/exec. We |
4021 | will get the event twice: once for the parent | |
4022 | LWP, and once for the child. We should already | |
4023 | know about the parent LWP, but the child will | |
4024 | be new to us. So, whenever we get this event, | |
4025 | if it represents a new thread, simply add the | |
4026 | thread to the list. */ | |
c3f6f71d | 4027 | |
37de36c6 | 4028 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4029 | temp_tid = proc_get_current_thread (pi); |
4030 | if (!find_procinfo (pi->pid, temp_tid)) | |
4031 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4032 | |
39f77062 | 4033 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4034 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4035 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4036 | add_thread (temp_ptid); |
4037 | ||
37de36c6 KB |
4038 | /* Return to WFI, but tell it to immediately resume. */ |
4039 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4040 | return inferior_ptid; |
37de36c6 KB |
4041 | } |
4042 | else if (syscall_is_lwp_exit (pi, what)) | |
4043 | { | |
17faa917 DJ |
4044 | if (print_thread_events) |
4045 | printf_unfiltered (_("[%s exited]\n"), | |
4046 | target_pid_to_str (retval)); | |
37de36c6 KB |
4047 | delete_thread (retval); |
4048 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4049 | return retval; | |
c3f6f71d | 4050 | } |
37de36c6 KB |
4051 | else if (0) |
4052 | { | |
4053 | /* FIXME: Do we need to handle SYS_sproc, | |
4054 | SYS_fork, or SYS_vfork here? The old procfs | |
4055 | seemed to use this event to handle threads on | |
4056 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4057 | that threads were actually separate processes. |
37de36c6 KB |
4058 | Irix, maybe? Anyway, low priority for now. */ |
4059 | } | |
4060 | else | |
4061 | { | |
a3f17187 | 4062 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4063 | proc_prettyprint_syscall (proc_what (pi), 0); |
4064 | printf_filtered ("\n"); | |
4065 | #ifndef PIOCSSPCACT | |
4066 | { | |
4067 | long i, nsysargs, *sysargs; | |
4068 | ||
4069 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4070 | (sysargs = proc_sysargs (pi)) != NULL) | |
4071 | { | |
77382aee PA |
4072 | printf_filtered (_("%ld syscall arguments:\n"), |
4073 | nsysargs); | |
37de36c6 | 4074 | for (i = 0; i < nsysargs; i++) |
19958708 | 4075 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4076 | i, sysargs[i]); |
4077 | } | |
4078 | } | |
c3f6f71d | 4079 | #endif |
37de36c6 | 4080 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4081 | return inferior_ptid; |
37de36c6 | 4082 | } |
c3f6f71d JM |
4083 | break; |
4084 | case PR_REQUESTED: | |
4085 | #if 0 /* FIXME */ | |
4086 | wstat = (SIGSTOP << 8) | 0177; | |
4087 | break; | |
4088 | #else | |
4089 | if (retry < 5) | |
4090 | { | |
a3f17187 | 4091 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4092 | pi->status_valid = 0; |
4093 | goto wait_again; | |
4094 | } | |
4095 | else | |
4096 | { | |
4097 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4098 | temp_tid = proc_get_current_thread (pi); |
4099 | if (!find_procinfo (pi->pid, temp_tid)) | |
4100 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4101 | |
4102 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4103 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4104 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4105 | add_thread (temp_ptid); |
c3f6f71d JM |
4106 | |
4107 | status->kind = TARGET_WAITKIND_STOPPED; | |
4108 | status->value.sig = 0; | |
4109 | return retval; | |
4110 | } | |
4111 | #endif | |
4112 | case PR_JOBCONTROL: | |
4113 | wstat = (what << 8) | 0177; | |
4114 | break; | |
4115 | case PR_FAULTED: | |
7af6341f | 4116 | switch (what) { |
c3f6f71d JM |
4117 | #ifdef FLTWATCH |
4118 | case FLTWATCH: | |
4119 | wstat = (SIGTRAP << 8) | 0177; | |
4120 | break; | |
4121 | #endif | |
4122 | #ifdef FLTKWATCH | |
4123 | case FLTKWATCH: | |
4124 | wstat = (SIGTRAP << 8) | 0177; | |
4125 | break; | |
4126 | #endif | |
4127 | /* FIXME: use si_signo where possible. */ | |
4128 | case FLTPRIV: | |
4129 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4130 | case FLTILL: | |
4131 | #endif | |
4132 | wstat = (SIGILL << 8) | 0177; | |
4133 | break; | |
4134 | case FLTBPT: | |
4135 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4136 | case FLTTRACE: | |
4137 | #endif | |
77382aee PA |
4138 | /* If we hit our __dbx_link() internal breakpoint, |
4139 | then remove it. See comments in procfs_init_inferior() | |
4140 | for more details. */ | |
4141 | if (dbx_link_bpt_addr != 0 | |
4142 | && dbx_link_bpt_addr | |
fb14de7b | 4143 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 4144 | remove_dbx_link_breakpoint (); |
9185ddce | 4145 | |
c3f6f71d JM |
4146 | wstat = (SIGTRAP << 8) | 0177; |
4147 | break; | |
4148 | case FLTSTACK: | |
4149 | case FLTACCESS: | |
4150 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4151 | case FLTBOUNDS: | |
4152 | #endif | |
4153 | wstat = (SIGSEGV << 8) | 0177; | |
4154 | break; | |
4155 | case FLTIOVF: | |
4156 | case FLTIZDIV: | |
4157 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4158 | case FLTFPE: | |
4159 | #endif | |
4160 | wstat = (SIGFPE << 8) | 0177; | |
4161 | break; | |
4162 | case FLTPAGE: /* Recoverable page fault */ | |
4163 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4164 | retval = pid_to_ptid (-1); |
c3f6f71d | 4165 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4166 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4167 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4168 | error (_("... giving up...")); |
c3f6f71d JM |
4169 | break; |
4170 | } | |
4171 | break; /* case PR_FAULTED: */ | |
4172 | default: /* switch (why) unmatched */ | |
4173 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4174 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4175 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4176 | error (_("... giving up...")); |
c3f6f71d JM |
4177 | break; |
4178 | } | |
77382aee PA |
4179 | /* Got this far without error: If retval isn't in the |
4180 | threads database, add it. */ | |
39f77062 KB |
4181 | if (PIDGET (retval) > 0 && |
4182 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4183 | !in_thread_list (retval)) |
c906108c | 4184 | { |
77382aee PA |
4185 | /* We have a new thread. We need to add it both to |
4186 | GDB's list and to our own. If we don't create a | |
4187 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
4188 | add_thread (retval); |
4189 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4190 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4191 | } |
c906108c | 4192 | } |
c3f6f71d | 4193 | else /* flags do not indicate STOPPED */ |
c906108c | 4194 | { |
c3f6f71d JM |
4195 | /* surely this can't happen... */ |
4196 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4197 | __LINE__); | |
4198 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4199 | error (_("procfs: ...giving up...")); |
c906108c | 4200 | } |
c906108c | 4201 | } |
c906108c | 4202 | |
c3f6f71d JM |
4203 | if (status) |
4204 | store_waitstatus (status, wstat); | |
c906108c SS |
4205 | } |
4206 | ||
c3f6f71d JM |
4207 | return retval; |
4208 | } | |
c906108c | 4209 | |
4e73f23d RM |
4210 | /* Perform a partial transfer to/from the specified object. For |
4211 | memory transfers, fall back to the old memory xfer functions. */ | |
4212 | ||
4213 | static LONGEST | |
4214 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4215 | const char *annex, gdb_byte *readbuf, |
4216 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4217 | { |
4218 | switch (object) | |
4219 | { | |
4220 | case TARGET_OBJECT_MEMORY: | |
4221 | if (readbuf) | |
0b62613e PA |
4222 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4223 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4224 | if (writebuf) |
0b62613e PA |
4225 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4226 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4227 | return -1; |
4228 | ||
4229 | #ifdef NEW_PROC_API | |
4230 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4231 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4232 | offset, len); |
4233 | #endif | |
4234 | ||
4235 | default: | |
4236 | if (ops->beneath != NULL) | |
4237 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4238 | readbuf, writebuf, offset, len); | |
4239 | return -1; | |
4240 | } | |
4241 | } | |
4242 | ||
4243 | ||
d0849a9a KB |
4244 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4245 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4246 | otherwise transfer them from the target. TARGET is unused. | |
4247 | ||
4248 | The return value is 0 if an error occurred or no bytes were | |
4249 | transferred. Otherwise, it will be a positive value which | |
4250 | indicates the number of bytes transferred between gdb and the | |
4251 | target. (Note that the interface also makes provisions for | |
4252 | negative values, but this capability isn't implemented here.) */ | |
4253 | ||
c3f6f71d | 4254 | static int |
0b62613e | 4255 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4256 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4257 | { |
4258 | procinfo *pi; | |
4259 | int nbytes = 0; | |
c906108c | 4260 | |
c3f6f71d | 4261 | /* Find procinfo for main process */ |
39f77062 | 4262 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4263 | if (pi->as_fd == 0 && |
4264 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4265 | { |
c3f6f71d JM |
4266 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4267 | return 0; | |
c906108c | 4268 | } |
c906108c | 4269 | |
c3f6f71d | 4270 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4271 | { |
c3f6f71d | 4272 | if (dowrite) |
c906108c | 4273 | { |
c3f6f71d | 4274 | #ifdef NEW_PROC_API |
cce7e648 | 4275 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4276 | #else |
cce7e648 | 4277 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4278 | #endif |
c3f6f71d | 4279 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4280 | } |
c3f6f71d | 4281 | else |
c906108c | 4282 | { |
cce7e648 | 4283 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4284 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4285 | } |
c3f6f71d | 4286 | if (nbytes < 0) |
c906108c | 4287 | { |
c3f6f71d | 4288 | nbytes = 0; |
c906108c | 4289 | } |
c906108c | 4290 | } |
c3f6f71d | 4291 | return nbytes; |
c906108c SS |
4292 | } |
4293 | ||
77382aee PA |
4294 | /* Called by target_resume before making child runnable. Mark cached |
4295 | registers and status's invalid. If there are "dirty" caches that | |
4296 | need to be written back to the child process, do that. | |
c906108c | 4297 | |
77382aee PA |
4298 | File descriptors are also cached. As they are a limited resource, |
4299 | we cannot hold onto them indefinitely. However, as they are | |
4300 | expensive to open, we don't want to throw them away | |
4301 | indescriminately either. As a compromise, we will keep the file | |
4302 | descriptors for the parent process, but discard any file | |
4303 | descriptors we may have accumulated for the threads. | |
4304 | ||
4305 | As this function is called by iterate_over_threads, it always | |
4306 | returns zero (so that iterate_over_threads will keep | |
4307 | iterating). */ | |
c3f6f71d JM |
4308 | |
4309 | static int | |
fba45db2 | 4310 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4311 | { |
77382aee PA |
4312 | /* About to run the child; invalidate caches and do any other |
4313 | cleanup. */ | |
c906108c | 4314 | |
c3f6f71d JM |
4315 | #if 0 |
4316 | if (pi->gregs_dirty) | |
4317 | if (parent == NULL || | |
4318 | proc_get_current_thread (parent) != pi->tid) | |
4319 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4320 | proc_warn (pi, "target_resume, set_gregs", | |
4321 | __LINE__); | |
a97b0ac8 | 4322 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4323 | if (pi->fpregs_dirty) |
4324 | if (parent == NULL || | |
4325 | proc_get_current_thread (parent) != pi->tid) | |
4326 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4327 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4328 | __LINE__); |
c906108c | 4329 | #endif |
c906108c | 4330 | |
c3f6f71d | 4331 | if (parent != NULL) |
c906108c | 4332 | { |
c3f6f71d | 4333 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4334 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4335 | We don't do this to the master (parent) procinfo. */ |
4336 | ||
4337 | close_procinfo_files (pi); | |
c906108c | 4338 | } |
c3f6f71d JM |
4339 | pi->gregs_valid = 0; |
4340 | pi->fpregs_valid = 0; | |
4341 | #if 0 | |
4342 | pi->gregs_dirty = 0; | |
4343 | pi->fpregs_dirty = 0; | |
c906108c | 4344 | #endif |
c3f6f71d JM |
4345 | pi->status_valid = 0; |
4346 | pi->threads_valid = 0; | |
c906108c | 4347 | |
c3f6f71d | 4348 | return 0; |
c906108c SS |
4349 | } |
4350 | ||
0fda6bd2 | 4351 | #if 0 |
77382aee PA |
4352 | /* A callback function for iterate_over_threads. Find the |
4353 | asynchronous signal thread, and make it runnable. See if that | |
4354 | helps matters any. */ | |
c906108c | 4355 | |
c3f6f71d | 4356 | static int |
fba45db2 | 4357 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4358 | { |
c3f6f71d JM |
4359 | #ifdef PR_ASLWP |
4360 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4361 | { |
c3f6f71d JM |
4362 | if (!proc_run_process (pi, 0, -1)) |
4363 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4364 | return 1; | |
c906108c | 4365 | } |
c906108c | 4366 | #endif |
c3f6f71d | 4367 | return 0; |
c906108c | 4368 | } |
0fda6bd2 | 4369 | #endif |
c906108c | 4370 | |
77382aee PA |
4371 | /* Make the child process runnable. Normally we will then call |
4372 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4373 | ||
4374 | If STEP is true, then arrange for the child to stop again after | |
4375 | executing a single instruction. If SIGNO is zero, then cancel any | |
4376 | pending signal; if non-zero, then arrange for the indicated signal | |
4377 | to be delivered to the child when it runs. If PID is -1, then | |
4378 | allow any child thread to run; if non-zero, then allow only the | |
4379 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4380 | |
4381 | static void | |
28439f5e PA |
4382 | procfs_resume (struct target_ops *ops, |
4383 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4384 | { |
c3f6f71d JM |
4385 | procinfo *pi, *thread; |
4386 | int native_signo; | |
4387 | ||
19958708 | 4388 | /* 2.1: |
c3f6f71d | 4389 | prrun.prflags |= PRSVADDR; |
19958708 | 4390 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4391 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4392 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4393 | prrun.prflags |= PRCFAULT; clear current fault. |
4394 | ||
4395 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4396 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4397 | PRSVADDR is unnecessary. |
4398 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4399 | This basically leaves PRSTEP and PRCSIG. | |
4400 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4401 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4402 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d JM |
4403 | |
4404 | /* Find procinfo for main process */ | |
39f77062 | 4405 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4406 | |
77382aee | 4407 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4408 | errno = 0; |
c906108c | 4409 | |
c3f6f71d JM |
4410 | /* Convert signal to host numbering. */ |
4411 | if (signo == 0 || | |
0fda6bd2 | 4412 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4413 | native_signo = 0; |
4414 | else | |
4415 | native_signo = target_signal_to_host (signo); | |
c906108c | 4416 | |
c3f6f71d | 4417 | pi->ignore_next_sigstop = 0; |
c906108c | 4418 | |
77382aee PA |
4419 | /* Running the process voids all cached registers and status. */ |
4420 | /* Void the threads' caches first. */ | |
19958708 | 4421 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4422 | /* Void the process procinfo's caches. */ |
4423 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4424 | |
39f77062 | 4425 | if (PIDGET (ptid) != -1) |
c906108c | 4426 | { |
77382aee PA |
4427 | /* Resume a specific thread, presumably suppressing the |
4428 | others. */ | |
39f77062 | 4429 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4430 | if (thread != NULL) |
c906108c | 4431 | { |
c3f6f71d JM |
4432 | if (thread->tid != 0) |
4433 | { | |
77382aee PA |
4434 | /* We're to resume a specific thread, and not the |
4435 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4436 | #ifdef PR_ASYNC |
4437 | if (!proc_set_async (pi)) | |
4438 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4439 | #endif | |
4440 | #if 0 | |
19958708 | 4441 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4442 | make_signal_thread_runnable, |
4443 | NULL); | |
4444 | #endif | |
4445 | pi = thread; /* substitute the thread's procinfo for run */ | |
4446 | } | |
c906108c SS |
4447 | } |
4448 | } | |
c906108c | 4449 | |
c3f6f71d | 4450 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4451 | { |
c3f6f71d | 4452 | if (errno == EBUSY) |
77382aee PA |
4453 | warning (_("resume: target already running. " |
4454 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4455 | else |
4456 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4457 | } |
c3f6f71d | 4458 | } |
c906108c | 4459 | |
77382aee PA |
4460 | /* Traverse the list of signals that GDB knows about (see "handle" |
4461 | command), and arrange for the target to be stopped or not, | |
4462 | according to these settings. Returns non-zero for success, zero | |
4463 | for failure. */ | |
c906108c | 4464 | |
c3f6f71d | 4465 | static int |
37de36c6 | 4466 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4467 | { |
4468 | int signo; | |
c906108c | 4469 | |
c3f6f71d JM |
4470 | for (signo = 0; signo < NSIG; signo ++) |
4471 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4472 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4473 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
3c95f01c | 4474 | gdb_prdelset (signals, signo); |
c3f6f71d | 4475 | else |
3c95f01c | 4476 | gdb_praddset (signals, signo); |
c906108c | 4477 | |
c3f6f71d | 4478 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4479 | } |
4480 | ||
77382aee | 4481 | /* Set up to trace signals in the child process. */ |
c906108c | 4482 | |
c3f6f71d | 4483 | static void |
39f77062 | 4484 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4485 | { |
37de36c6 | 4486 | gdb_sigset_t signals; |
39f77062 | 4487 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4488 | |
c3f6f71d JM |
4489 | if (proc_get_traced_signals (pi, &signals) && |
4490 | register_gdb_signals (pi, &signals)) | |
4491 | return; | |
4492 | else | |
4493 | proc_error (pi, "notice_signals", __LINE__); | |
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 | |
4530 | /* FIXME: use access functions */ | |
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 (); | |
4554 | /* FIXME: use proc_set_current_signal */ | |
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 JM |
4585 | { |
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 JM |
4603 | { |
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 JM |
4638 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4639 | perror ("procfs: out of memory in 'init_inferior'"); | |
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? | |
4663 | We're it's parent, for Ghu's sake! */ | |
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 | ||
77382aee | 4675 | /* Register to trace selected signals in the child. */ |
c3f6f71d JM |
4676 | prfillset (&signals); |
4677 | if (!register_gdb_signals (pi, &signals)) | |
4678 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4679 | ||
4680 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4681 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4682 | ||
0d06e24b JM |
4683 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4684 | and possibly even turning ON kill-on-last-close at this point. But | |
4685 | I can't make that change without careful testing which I don't have | |
4686 | time to do right now... */ | |
c3f6f71d JM |
4687 | /* Turn on run-on-last-close flag so that the child |
4688 | will die if GDB goes away for some reason. */ | |
4689 | if (!proc_set_run_on_last_close (pi)) | |
4690 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4691 | ||
2689673f PA |
4692 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4693 | lwpid = proc_get_current_thread (pi); | |
4694 | ||
4695 | /* Create a procinfo for the main lwp. */ | |
4696 | create_procinfo (pid, lwpid); | |
4697 | ||
4698 | /* We already have a main thread registered in the thread table at | |
4699 | this point, but it didn't have any lwp info yet. Notify the core | |
4700 | about it. This changes inferior_ptid as well. */ | |
4701 | thread_change_ptid (pid_to_ptid (pid), | |
4702 | MERGEPID (pid, lwpid)); | |
c906108c | 4703 | |
46ac7a5d AC |
4704 | /* Typically two, one trap to exec the shell, one to exec the |
4705 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4706 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4707 | |
4708 | #ifdef SYS_syssgi | |
4709 | /* On mips-irix, we need to stop the inferior early enough during | |
4710 | the startup phase in order to be able to load the shared library | |
4711 | symbols and insert the breakpoints that are located in these shared | |
4712 | libraries. Stopping at the program entry point is not good enough | |
4713 | because the -init code is executed before the execution reaches | |
4714 | that point. | |
4715 | ||
4716 | So what we need to do is to insert a breakpoint in the runtime | |
4717 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4718 | called by rld once all shared libraries have been mapped, but before | |
4719 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4720 | as rld is not part of the executable we are running, and thus we need | |
4721 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4722 | |
9185ddce JB |
4723 | For this, we trace all syssgi() syscall exit events. Each time |
4724 | we detect such an event, we iterate over each text memory maps, | |
4725 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4726 | When found, we know that rld has been mapped, and that we can insert | |
4727 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4728 | has been inserted, the syssgi() notifications are no longer necessary, | |
4729 | so they should be canceled. */ | |
4730 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4731 | #endif |
c3f6f71d | 4732 | } |
c906108c | 4733 | |
77382aee PA |
4734 | /* When GDB forks to create a new process, this function is called on |
4735 | the child side of the fork before GDB exec's the user program. Its | |
4736 | job is to make the child minimally debuggable, so that the parent | |
4737 | GDB process can connect to the child and take over. This function | |
4738 | should do only the minimum to make that possible, and to | |
4739 | synchronize with the parent process. The parent process should | |
4740 | take care of the details. */ | |
c3f6f71d JM |
4741 | |
4742 | static void | |
fba45db2 | 4743 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4744 | { |
4745 | /* This routine called on the child side (inferior side) | |
4746 | after GDB forks the inferior. It must use only local variables, | |
4747 | because it may be sharing data space with its parent. */ | |
c906108c | 4748 | |
c3f6f71d | 4749 | procinfo *pi; |
37de36c6 | 4750 | sysset_t *exitset; |
c906108c | 4751 | |
c3f6f71d | 4752 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4753 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4754 | |
c3f6f71d JM |
4755 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4756 | { | |
4757 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4758 | gdb_flush (gdb_stderr); | |
77382aee PA |
4759 | /* No need to call "dead_procinfo", because we're going to |
4760 | exit. */ | |
c3f6f71d JM |
4761 | _exit (127); |
4762 | } | |
c906108c | 4763 | |
c3f6f71d JM |
4764 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4765 | /* OSF method for tracing exec syscalls. Quoting: | |
4766 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4767 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4768 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4769 | { |
4770 | int prfs_flags; | |
c906108c | 4771 | |
c3f6f71d JM |
4772 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4773 | { | |
4774 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4775 | gdb_flush (gdb_stderr); | |
4776 | _exit (127); | |
4777 | } | |
4778 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4779 | |
c3f6f71d JM |
4780 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4781 | { | |
4782 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4783 | gdb_flush (gdb_stderr); | |
4784 | _exit (127); | |
4785 | } | |
4786 | } | |
4787 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4788 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4789 | /* GW: Rationale... |
4790 | Not all systems with /proc have all the exec* syscalls with the same | |
4791 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4792 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4793 | |
37de36c6 KB |
4794 | exitset = sysset_t_alloc (pi); |
4795 | gdb_premptysysset (exitset); | |
c3f6f71d | 4796 | #ifdef SYS_exec |
37de36c6 | 4797 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4798 | #endif |
4799 | #ifdef SYS_execve | |
37de36c6 | 4800 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4801 | #endif |
4802 | #ifdef SYS_execv | |
37de36c6 | 4803 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4804 | #endif |
37de36c6 KB |
4805 | #ifdef DYNAMIC_SYSCALLS |
4806 | { | |
4807 | int callnum = find_syscall (pi, "execve"); | |
4808 | ||
4809 | if (callnum >= 0) | |
4810 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4811 | |
37de36c6 KB |
4812 | callnum = find_syscall (pi, "ra_execve"); |
4813 | if (callnum >= 0) | |
4814 | gdb_praddsysset (exitset, callnum); | |
4815 | } | |
4816 | #endif /* DYNAMIC_SYSCALLS */ | |
4817 | ||
4818 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4819 | { |
c3f6f71d JM |
4820 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4821 | gdb_flush (gdb_stderr); | |
4822 | _exit (127); | |
c906108c | 4823 | } |
c3f6f71d JM |
4824 | #endif /* PRFS_STOPEXEC */ |
4825 | ||
4826 | /* FIXME: should this be done in the parent instead? */ | |
4827 | /* Turn off inherit on fork flag so that all grand-children | |
4828 | of gdb start with tracing flags cleared. */ | |
4829 | if (!proc_unset_inherit_on_fork (pi)) | |
4830 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4831 | ||
4832 | /* Turn off run on last close flag, so that the child process | |
4833 | cannot run away just because we close our handle on it. | |
4834 | We want it to wait for the parent to attach. */ | |
4835 | if (!proc_unset_run_on_last_close (pi)) | |
4836 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4837 | ||
19958708 | 4838 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
4839 | we have our own address space, and we're about to do an exec! */ |
4840 | /*destroy_procinfo (pi);*/ | |
c906108c | 4841 | } |
c906108c | 4842 | |
77382aee PA |
4843 | /* This function is called BEFORE gdb forks the inferior process. Its |
4844 | only real responsibility is to set things up for the fork, and tell | |
4845 | GDB which two functions to call after the fork (one for the parent, | |
4846 | and one for the child). | |
4847 | ||
4848 | This function does a complicated search for a unix shell program, | |
4849 | which it then uses to parse arguments and environment variables to | |
4850 | be sent to the child. I wonder whether this code could not be | |
4851 | abstracted out and shared with other unix targets such as | |
4852 | inf-ptrace? */ | |
c906108c SS |
4853 | |
4854 | static void | |
136d6dae VP |
4855 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4856 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4857 | { |
4858 | char *shell_file = getenv ("SHELL"); | |
4859 | char *tryname; | |
28439f5e PA |
4860 | int pid; |
4861 | ||
c906108c SS |
4862 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4863 | { | |
4864 | ||
4865 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4866 | just do this the normal way (via execlp, which operates by |
4867 | attempting an exec for each element of the PATH until it | |
4868 | finds one which succeeds), then there will be an exec for | |
4869 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4870 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4871 | for these failed execs with the ones for successful execs | |
4872 | (whether the exec has succeeded is stored at that time in the | |
4873 | carry bit or some such architecture-specific and | |
4874 | non-ABI-specified place). | |
4875 | ||
4876 | So I can't think of anything better than to search the PATH | |
4877 | now. This has several disadvantages: (1) There is a race | |
4878 | condition; if we find a file now and it is deleted before we | |
4879 | exec it, we lose, even if the deletion leaves a valid file | |
4880 | further down in the PATH, (2) there is no way to know exactly | |
4881 | what an executable (in the sense of "capable of being | |
4882 | exec'd") file is. Using access() loses because it may lose | |
4883 | if the caller is the superuser; failing to use it loses if | |
4884 | there are ACLs or some such. */ | |
c906108c SS |
4885 | |
4886 | char *p; | |
4887 | char *p1; | |
4888 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4889 | path is used from within GDB. */ |
c906108c SS |
4890 | char *path = getenv ("PATH"); |
4891 | int len; | |
4892 | struct stat statbuf; | |
4893 | ||
4894 | if (path == NULL) | |
4895 | path = "/bin:/usr/bin"; | |
4896 | ||
4897 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4898 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4899 | { |
4900 | p1 = strchr (p, ':'); | |
4901 | if (p1 != NULL) | |
4902 | len = p1 - p; | |
4903 | else | |
4904 | len = strlen (p); | |
4905 | strncpy (tryname, p, len); | |
4906 | tryname[len] = '\0'; | |
4907 | strcat (tryname, "/"); | |
4908 | strcat (tryname, shell_file); | |
4909 | if (access (tryname, X_OK) < 0) | |
4910 | continue; | |
4911 | if (stat (tryname, &statbuf) < 0) | |
4912 | continue; | |
4913 | if (!S_ISREG (statbuf.st_mode)) | |
4914 | /* We certainly need to reject directories. I'm not quite | |
4915 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4916 | that people want to exec() these things. */ | |
4917 | continue; | |
4918 | break; | |
4919 | } | |
4920 | if (p == NULL) | |
4921 | /* Not found. This must be an error rather than merely passing | |
4922 | the file to execlp(), because execlp() would try all the | |
4923 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4924 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4925 | __LINE__, shell_file); |
c906108c SS |
4926 | |
4927 | shell_file = tryname; | |
4928 | } | |
4929 | ||
28439f5e PA |
4930 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4931 | NULL, NULL, shell_file); | |
4932 | ||
4933 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4934 | } |
4935 | ||
4936 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4937 | |
27087a3d JB |
4938 | static void |
4939 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4940 | { | |
9185ddce | 4941 | #ifdef SYS_syssgi |
77382aee | 4942 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4943 | They should normally have been removed by now, but they may still |
4944 | be activated if the inferior doesn't use shared libraries, or if | |
4945 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4946 | See procfs_init_inferior() for more details. |
4947 | ||
4948 | Since these notifications are only ever enabled when we spawned | |
4949 | the inferior ourselves, there is nothing to do when the inferior | |
4950 | was created by attaching to an already running process, or when | |
4951 | debugging a core file. */ | |
4952 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4953 | return; | |
4954 | ||
9185ddce | 4955 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4956 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4957 | #endif |
c906108c SS |
4958 | } |
4959 | ||
77382aee | 4960 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4961 | |
c3f6f71d | 4962 | static int |
fba45db2 | 4963 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4964 | { |
39f77062 | 4965 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4966 | |
2689673f | 4967 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4968 | add_thread (gdb_threadid); |
c906108c | 4969 | |
c3f6f71d JM |
4970 | return 0; |
4971 | } | |
4972 | ||
77382aee PA |
4973 | /* Query all the threads that the target knows about, and give them |
4974 | back to GDB to add to its list. */ | |
c3f6f71d JM |
4975 | |
4976 | void | |
28439f5e | 4977 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4978 | { |
4979 | procinfo *pi; | |
4980 | ||
4981 | /* Find procinfo for main process */ | |
39f77062 | 4982 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4983 | proc_update_threads (pi); |
4984 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4985 | } |
4986 | ||
77382aee PA |
4987 | /* Return true if the thread is still 'alive'. This guy doesn't |
4988 | really seem to be doing his job. Got to investigate how to tell | |
4989 | when a thread is really gone. */ | |
c906108c | 4990 | |
c906108c | 4991 | static int |
28439f5e | 4992 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4993 | { |
c3f6f71d JM |
4994 | int proc, thread; |
4995 | procinfo *pi; | |
c906108c | 4996 | |
39f77062 KB |
4997 | proc = PIDGET (ptid); |
4998 | thread = TIDGET (ptid); | |
c3f6f71d JM |
4999 | /* If I don't know it, it ain't alive! */ |
5000 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5001 | return 0; | |
5002 | ||
5003 | /* If I can't get its status, it ain't alive! | |
5004 | What's more, I need to forget about it! */ | |
5005 | if (!proc_get_status (pi)) | |
5006 | { | |
5007 | destroy_procinfo (pi); | |
5008 | return 0; | |
5009 | } | |
77382aee PA |
5010 | /* I couldn't have got its status if it weren't alive, so it's |
5011 | alive. */ | |
c3f6f71d | 5012 | return 1; |
c906108c | 5013 | } |
c3f6f71d | 5014 | |
77382aee PA |
5015 | /* Convert PTID to a string. Returns the string in a static |
5016 | buffer. */ | |
c3f6f71d JM |
5017 | |
5018 | char * | |
117de6a9 | 5019 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5020 | { |
5021 | static char buf[80]; | |
c3f6f71d | 5022 | |
5240ceac MK |
5023 | if (TIDGET (ptid) == 0) |
5024 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5025 | else |
21749010 | 5026 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5027 | |
5028 | return buf; | |
c3f6f71d JM |
5029 | } |
5030 | ||
77382aee | 5031 | /* Insert a watchpoint. */ |
c3f6f71d | 5032 | |
19958708 | 5033 | int |
39f77062 | 5034 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 5035 | int after) |
c906108c | 5036 | { |
c3f6f71d | 5037 | #ifndef UNIXWARE |
37de36c6 | 5038 | #ifndef AIX5 |
c3f6f71d | 5039 | int pflags = 0; |
19958708 | 5040 | procinfo *pi; |
c3f6f71d | 5041 | |
19958708 | 5042 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5043 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5044 | |
5045 | /* Translate from GDB's flags to /proc's */ | |
5046 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5047 | { |
c3f6f71d JM |
5048 | switch (rwflag) { /* FIXME: need an enum! */ |
5049 | case hw_write: /* default watchpoint (write) */ | |
5050 | pflags = WRITE_WATCHFLAG; | |
5051 | break; | |
5052 | case hw_read: /* read watchpoint */ | |
5053 | pflags = READ_WATCHFLAG; | |
5054 | break; | |
5055 | case hw_access: /* access watchpoint */ | |
5056 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5057 | break; | |
5058 | case hw_execute: /* execution HW breakpoint */ | |
5059 | pflags = EXEC_WATCHFLAG; | |
5060 | break; | |
5061 | default: /* Something weird. Return error. */ | |
c906108c | 5062 | return -1; |
c3f6f71d JM |
5063 | } |
5064 | if (after) /* Stop after r/w access is completed. */ | |
5065 | pflags |= AFTER_WATCHFLAG; | |
5066 | } | |
5067 | ||
5068 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5069 | { | |
5070 | if (errno == E2BIG) /* Typical error for no resources */ | |
5071 | return -1; /* fail */ | |
5072 | /* GDB may try to remove the same watchpoint twice. | |
5073 | If a remove request returns no match, don't error. */ | |
c906108c | 5074 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5075 | return 0; /* ignore */ |
5076 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5077 | } |
37de36c6 KB |
5078 | #endif /* AIX5 */ |
5079 | #endif /* UNIXWARE */ | |
c906108c SS |
5080 | return 0; |
5081 | } | |
5082 | ||
1e03ad20 KB |
5083 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5084 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5085 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5086 | far. | |
19958708 | 5087 | |
1e03ad20 KB |
5088 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5089 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5090 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5091 | |
5092 | static int | |
5093 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5094 | { | |
1e03ad20 KB |
5095 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5096 | and target pointers must be of the same size. If they are not, | |
5097 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5098 | fact that proc_set_watchpoint() calls |
5099 | procfs_address_to_host_pointer(); a close inspection of | |
5100 | procfs_address_to_host_pointer will reveal that an internal error | |
5101 | will be generated when the host and target pointer sizes are | |
5102 | different. */ | |
4e906f53 | 5103 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
f4a14ae6 | 5104 | |
4e906f53 | 5105 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
5106 | return 0; |
5107 | ||
5108 | /* Other tests here??? */ | |
5109 | ||
5110 | return 1; | |
1e03ad20 KB |
5111 | } |
5112 | ||
77382aee PA |
5113 | /* Returns non-zero if process is stopped on a hardware watchpoint |
5114 | fault, else returns zero. */ | |
c3f6f71d | 5115 | |
25513619 PA |
5116 | static int |
5117 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5118 | { |
c3f6f71d | 5119 | procinfo *pi; |
c906108c | 5120 | |
25513619 | 5121 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 5122 | |
c3f6f71d | 5123 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5124 | { |
c3f6f71d | 5125 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5126 | { |
c906108c | 5127 | #ifdef FLTWATCH |
c3f6f71d JM |
5128 | if (proc_what (pi) == FLTWATCH) |
5129 | return 1; | |
c906108c SS |
5130 | #endif |
5131 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5132 | if (proc_what (pi) == FLTKWATCH) |
5133 | return 1; | |
c906108c | 5134 | #endif |
c3f6f71d | 5135 | } |
c906108c SS |
5136 | } |
5137 | return 0; | |
5138 | } | |
c906108c | 5139 | |
77382aee PA |
5140 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
5141 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
5142 | address. This function is only called if | |
5143 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
5144 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
5145 | |
5146 | static int | |
5147 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
5148 | { | |
5149 | procinfo *pi; | |
5150 | ||
5151 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5152 | return proc_watchpoint_address (pi, addr); | |
5153 | } | |
5154 | ||
25513619 | 5155 | static int |
0cf6dd15 TJB |
5156 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
5157 | struct expression *cond) | |
25513619 | 5158 | { |
d92524f1 | 5159 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5160 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5161 | { |
5162 | /* When a hardware watchpoint fires off the PC will be left at | |
5163 | the instruction following the one which caused the | |
5164 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5165 | the watchpoint. */ | |
5166 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5167 | } | |
5168 | else | |
5169 | { | |
5170 | /* When a hardware watchpoint fires off the PC will be left at | |
5171 | the instruction which caused the watchpoint. It will be | |
5172 | necessary for GDB to step over the watchpoint. */ | |
5173 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5174 | } | |
5175 | } | |
5176 | ||
5177 | static int | |
0cf6dd15 TJB |
5178 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
5179 | struct expression *cond) | |
25513619 PA |
5180 | { |
5181 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5182 | } | |
5183 | ||
5184 | static int | |
5185 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5186 | { | |
5187 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5188 | system can support "thousands" of hardware watchpoints, but gives | |
5189 | no method for finding out how many; It doesn't say anything about | |
5190 | the allowed size for the watched area either. So we just tell | |
5191 | GDB 'yes'. */ | |
5192 | return 1; | |
5193 | } | |
5194 | ||
5195 | void | |
5196 | procfs_use_watchpoints (struct target_ops *t) | |
5197 | { | |
5198 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5199 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5200 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5201 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5202 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 5203 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
5204 | } |
5205 | ||
77382aee PA |
5206 | /* Memory Mappings Functions: */ |
5207 | ||
5208 | /* Call a callback function once for each mapping, passing it the | |
5209 | mapping, an optional secondary callback function, and some optional | |
5210 | opaque data. Quit and return the first non-zero value returned | |
5211 | from the callback. | |
5212 | ||
5213 | PI is the procinfo struct for the process to be mapped. FUNC is | |
5214 | the callback function to be called by this iterator. DATA is the | |
5215 | optional opaque data to be passed to the callback function. | |
5216 | CHILD_FUNC is the optional secondary function pointer to be passed | |
5217 | to the child function. Returns the first non-zero return value | |
5218 | from the callback function, or zero. */ | |
831e682e MS |
5219 | |
5220 | static int | |
b8edc417 | 5221 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 5222 | void *data, |
19958708 | 5223 | int (*func) (struct prmap *map, |
b8edc417 | 5224 | find_memory_region_ftype child_func, |
831e682e MS |
5225 | void *data)) |
5226 | { | |
5227 | char pathname[MAX_PROC_NAME_SIZE]; | |
5228 | struct prmap *prmaps; | |
5229 | struct prmap *prmap; | |
5230 | int funcstat; | |
5231 | int map_fd; | |
5232 | int nmap; | |
5233 | #ifdef NEW_PROC_API | |
5234 | struct stat sbuf; | |
5235 | #endif | |
5236 | ||
19958708 | 5237 | /* Get the number of mappings, allocate space, |
831e682e MS |
5238 | and read the mappings into prmaps. */ |
5239 | #ifdef NEW_PROC_API | |
5240 | /* Open map fd. */ | |
5241 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5242 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5243 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5244 | ||
5245 | /* Make sure it gets closed again. */ | |
5246 | make_cleanup_close (map_fd); | |
5247 | ||
19958708 | 5248 | /* Use stat to determine the file size, and compute |
831e682e MS |
5249 | the number of prmap_t objects it contains. */ |
5250 | if (fstat (map_fd, &sbuf) != 0) | |
5251 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5252 | ||
5253 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5254 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5255 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5256 | != (nmap * sizeof (*prmaps))) | |
5257 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5258 | #else | |
5259 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5260 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5261 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5262 | ||
5263 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5264 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5265 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5266 | #endif | |
5267 | ||
5268 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5269 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5270 | return funcstat; | |
5271 | ||
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 MS |
5377 | if (summary) |
5378 | return; /* No output for summary mode. */ | |
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 | |
fba45db2 | 5403 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5404 | { |
c3f6f71d | 5405 | struct cleanup *old_chain; |
388faa48 MS |
5406 | procinfo *process = NULL; |
5407 | procinfo *thread = NULL; | |
5408 | char **argv = NULL; | |
5409 | char *tmp = NULL; | |
5410 | int pid = 0; | |
5411 | int tid = 0; | |
5412 | int mappings = 0; | |
c906108c | 5413 | |
c3f6f71d JM |
5414 | old_chain = make_cleanup (null_cleanup, 0); |
5415 | if (args) | |
0fda6bd2 | 5416 | { |
d1a41061 PP |
5417 | argv = gdb_buildargv (args); |
5418 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5419 | } |
c3f6f71d JM |
5420 | while (argv != NULL && *argv != NULL) |
5421 | { | |
5422 | if (isdigit (argv[0][0])) | |
5423 | { | |
5424 | pid = strtoul (argv[0], &tmp, 10); | |
5425 | if (*tmp == '/') | |
5426 | tid = strtoul (++tmp, NULL, 10); | |
5427 | } | |
5428 | else if (argv[0][0] == '/') | |
5429 | { | |
5430 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5431 | } | |
388faa48 MS |
5432 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5433 | { | |
5434 | mappings = 1; | |
5435 | } | |
c3f6f71d JM |
5436 | else |
5437 | { | |
5438 | /* [...] */ | |
5439 | } | |
5440 | argv++; | |
5441 | } | |
5442 | if (pid == 0) | |
39f77062 | 5443 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5444 | if (pid == 0) |
8a3fe4f8 | 5445 | error (_("No current process: you must name one.")); |
c3f6f71d | 5446 | else |
c906108c | 5447 | { |
c3f6f71d JM |
5448 | /* Have pid, will travel. |
5449 | First see if it's a process we're already debugging. */ | |
5450 | process = find_procinfo (pid, 0); | |
5451 | if (process == NULL) | |
5452 | { | |
19958708 | 5453 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5454 | remember to close it again when finished. */ |
5455 | process = create_procinfo (pid, 0); | |
004527cb | 5456 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5457 | if (!open_procinfo_files (process, FD_CTL)) |
5458 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5459 | } | |
c906108c | 5460 | } |
c3f6f71d JM |
5461 | if (tid != 0) |
5462 | thread = create_procinfo (pid, tid); | |
5463 | ||
5464 | if (process) | |
5465 | { | |
a3f17187 | 5466 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5467 | proc_prettyprint_flags (proc_flags (process), 1); |
5468 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5469 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5470 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5471 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5472 | proc_get_nthreads (process)); |
5473 | } | |
5474 | if (thread) | |
5475 | { | |
a3f17187 | 5476 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5477 | proc_prettyprint_flags (proc_flags (thread), 1); |
5478 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5479 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5480 | } | |
5481 | ||
388faa48 MS |
5482 | if (mappings) |
5483 | { | |
5484 | info_proc_mappings (process, 0); | |
5485 | } | |
5486 | ||
c3f6f71d | 5487 | do_cleanups (old_chain); |
c906108c SS |
5488 | } |
5489 | ||
9185ddce JB |
5490 | /* Modify the status of the system call identified by SYSCALLNUM in |
5491 | the set of syscalls that are currently traced/debugged. | |
5492 | ||
5493 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5494 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5495 | ||
5496 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5497 | will be disabled. */ | |
5498 | ||
5499 | static void | |
5500 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5501 | int mode, int from_tty) |
9185ddce JB |
5502 | { |
5503 | sysset_t *sysset; | |
77382aee | 5504 | |
9185ddce JB |
5505 | if (entry_or_exit == PR_SYSENTRY) |
5506 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5507 | else | |
5508 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5509 | ||
5510 | if (sysset == NULL) | |
5511 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5512 | ||
5513 | if (mode == FLAG_SET) | |
5514 | gdb_praddsysset (sysset, syscallnum); | |
5515 | else | |
5516 | gdb_prdelsysset (sysset, syscallnum); | |
5517 | ||
5518 | if (entry_or_exit == PR_SYSENTRY) | |
5519 | { | |
5520 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5521 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5522 | } |
5523 | else | |
5524 | { | |
5525 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5526 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5527 | } |
5528 | } | |
5529 | ||
c3f6f71d | 5530 | static void |
fba45db2 | 5531 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5532 | { |
c3f6f71d | 5533 | procinfo *pi; |
c906108c | 5534 | |
39f77062 | 5535 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5536 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5537 | |
c3f6f71d | 5538 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5539 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5540 | |
39f77062 | 5541 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5542 | if (isdigit (args[0])) |
5543 | { | |
9185ddce | 5544 | const int syscallnum = atoi (args); |
c906108c | 5545 | |
9185ddce | 5546 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5547 | } |
5548 | } | |
5549 | ||
19958708 | 5550 | static void |
fba45db2 | 5551 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5552 | { |
c3f6f71d JM |
5553 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5554 | } | |
c906108c | 5555 | |
19958708 | 5556 | static void |
fba45db2 | 5557 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5558 | { |
5559 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5560 | } |
c906108c | 5561 | |
19958708 | 5562 | static void |
fba45db2 | 5563 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5564 | { |
5565 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5566 | } | |
5567 | ||
19958708 | 5568 | static void |
fba45db2 | 5569 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5570 | { |
c3f6f71d JM |
5571 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5572 | } | |
c906108c | 5573 | |
c906108c | 5574 | |
c906108c | 5575 | void |
fba45db2 | 5576 | _initialize_procfs (void) |
c906108c | 5577 | { |
27087a3d JB |
5578 | observer_attach_inferior_created (procfs_inferior_created); |
5579 | ||
1bedd215 AC |
5580 | add_info ("proc", info_proc_cmd, _("\ |
5581 | Show /proc process information about any running process.\n\ | |
388faa48 | 5582 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 5583 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 5584 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5585 | _("Give a trace of entries into the syscall.")); |
19958708 | 5586 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5587 | _("Give a trace of exits from the syscall.")); |
19958708 | 5588 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5589 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5590 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5591 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5592 | } |
5593 | ||
5594 | /* =================== END, GDB "MODULE" =================== */ | |
5595 | ||
5596 | ||
5597 | ||
77382aee PA |
5598 | /* miscellaneous stubs: */ |
5599 | ||
5600 | /* The following satisfy a few random symbols mostly created by the | |
5601 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5602 | |
77382aee PA |
5603 | /* Return a pid for which we guarantee we will be able to find a |
5604 | 'live' procinfo. */ | |
c3f6f71d | 5605 | |
39f77062 | 5606 | ptid_t |
fba45db2 | 5607 | procfs_first_available (void) |
c3f6f71d | 5608 | { |
39f77062 | 5609 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5610 | } |
be4d1333 MS |
5611 | |
5612 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5613 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5614 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5615 | |
5616 | static char * | |
19958708 | 5617 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
5618 | char *note_data, int *note_size, |
5619 | enum target_signal stop_signal) | |
be4d1333 | 5620 | { |
594f7785 | 5621 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5622 | gdb_gregset_t gregs; |
5623 | gdb_fpregset_t fpregs; | |
5624 | unsigned long merged_pid; | |
75125405 | 5625 | struct cleanup *old_chain; |
be4d1333 MS |
5626 | |
5627 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5628 | ||
75125405 DJ |
5629 | /* This part is the old method for fetching registers. |
5630 | It should be replaced by the newer one using regsets | |
5631 | once it is implemented in this platform: | |
5632 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ | |
5633 | ||
5634 | old_chain = save_inferior_ptid (); | |
5635 | inferior_ptid = ptid; | |
5636 | target_fetch_registers (regcache, -1); | |
5637 | ||
594f7785 | 5638 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5639 | #if defined (NEW_PROC_API) |
65554fef MS |
5640 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5641 | note_data, | |
5642 | note_size, | |
19958708 | 5643 | merged_pid, |
65554fef MS |
5644 | stop_signal, |
5645 | &gregs); | |
5646 | #else | |
be4d1333 | 5647 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5648 | note_data, |
5649 | note_size, | |
19958708 | 5650 | merged_pid, |
be4d1333 | 5651 | stop_signal, |
65554fef MS |
5652 | &gregs); |
5653 | #endif | |
594f7785 | 5654 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5655 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5656 | note_data, | |
5657 | note_size, | |
5658 | &fpregs, | |
5659 | sizeof (fpregs)); | |
75125405 DJ |
5660 | |
5661 | do_cleanups (old_chain); | |
5662 | ||
be4d1333 MS |
5663 | return note_data; |
5664 | } | |
5665 | ||
5666 | struct procfs_corefile_thread_data { | |
5667 | bfd *obfd; | |
5668 | char *note_data; | |
5669 | int *note_size; | |
2020b7ab | 5670 | enum target_signal stop_signal; |
be4d1333 MS |
5671 | }; |
5672 | ||
5673 | static int | |
65554fef | 5674 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5675 | { |
5676 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5677 | |
2689673f | 5678 | if (pi != NULL) |
be4d1333 | 5679 | { |
75125405 | 5680 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
f4a14ae6 | 5681 | |
75125405 | 5682 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5683 | args->note_data, |
2020b7ab PA |
5684 | args->note_size, |
5685 | args->stop_signal); | |
be4d1333 MS |
5686 | } |
5687 | return 0; | |
5688 | } | |
5689 | ||
a223f1e7 JB |
5690 | static int |
5691 | find_signalled_thread (struct thread_info *info, void *data) | |
5692 | { | |
16c381f0 | 5693 | if (info->suspend.stop_signal != TARGET_SIGNAL_0 |
a223f1e7 JB |
5694 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5695 | return 1; | |
5696 | ||
5697 | return 0; | |
5698 | } | |
5699 | ||
5700 | static enum target_signal | |
5701 | find_stop_signal (void) | |
5702 | { | |
5703 | struct thread_info *info = | |
5704 | iterate_over_threads (find_signalled_thread, NULL); | |
5705 | ||
5706 | if (info) | |
16c381f0 | 5707 | return info->suspend.stop_signal; |
a223f1e7 JB |
5708 | else |
5709 | return TARGET_SIGNAL_0; | |
5710 | } | |
5711 | ||
be4d1333 MS |
5712 | static char * |
5713 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5714 | { | |
5715 | struct cleanup *old_chain; | |
5716 | gdb_gregset_t gregs; | |
5717 | gdb_fpregset_t fpregs; | |
5718 | char fname[16] = {'\0'}; | |
5719 | char psargs[80] = {'\0'}; | |
5720 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5721 | char *note_data = NULL; | |
6dbdc4a3 | 5722 | char *inf_args; |
be4d1333 | 5723 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5724 | gdb_byte *auxv; |
4e73f23d | 5725 | int auxv_len; |
651c8d2d | 5726 | enum target_signal stop_signal; |
be4d1333 MS |
5727 | |
5728 | if (get_exec_file (0)) | |
5729 | { | |
5730 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 5731 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 5732 | sizeof (psargs)); |
6dbdc4a3 MS |
5733 | |
5734 | inf_args = get_inferior_args (); | |
5735 | if (inf_args && *inf_args && | |
5736 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5737 | { |
19958708 | 5738 | strncat (psargs, " ", |
be4d1333 | 5739 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5740 | strncat (psargs, inf_args, |
be4d1333 MS |
5741 | sizeof (psargs) - strlen (psargs)); |
5742 | } | |
5743 | } | |
5744 | ||
19958708 RM |
5745 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5746 | note_data, | |
5747 | note_size, | |
5748 | fname, | |
be4d1333 MS |
5749 | psargs); |
5750 | ||
651c8d2d PA |
5751 | stop_signal = find_stop_signal (); |
5752 | ||
8903eff6 | 5753 | #ifdef UNIXWARE |
594f7785 | 5754 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5755 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5756 | PIDGET (inferior_ptid), | |
65554fef MS |
5757 | stop_signal, &gregs); |
5758 | #endif | |
5759 | ||
be4d1333 MS |
5760 | thread_args.obfd = obfd; |
5761 | thread_args.note_data = note_data; | |
5762 | thread_args.note_size = note_size; | |
651c8d2d | 5763 | thread_args.stop_signal = stop_signal; |
65554fef MS |
5764 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5765 | ||
2689673f PA |
5766 | /* There should be always at least one thread. */ |
5767 | gdb_assert (thread_args.note_data != note_data); | |
5768 | note_data = thread_args.note_data; | |
be4d1333 | 5769 | |
13547ab6 DJ |
5770 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5771 | NULL, &auxv); | |
4e73f23d RM |
5772 | if (auxv_len > 0) |
5773 | { | |
5774 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5775 | "CORE", NT_AUXV, auxv, auxv_len); | |
5776 | xfree (auxv); | |
5777 | } | |
5778 | ||
be4d1333 MS |
5779 | make_cleanup (xfree, note_data); |
5780 | return note_data; | |
5781 | } | |
65554fef MS |
5782 | #else /* !(Solaris or Unixware) */ |
5783 | static char * | |
5784 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5785 | { | |
8a3fe4f8 | 5786 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5787 | return NULL; /* lint */ |
5788 | } | |
5789 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5790 | /* =================== END GCORE .NOTE "MODULE" =================== */ |