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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 JB |
441 | /* A function type used as a callback back iterate_over_mappings. */ |
442 | typedef int (iterate_over_mappings_cb_ftype) | |
443 | (CORE_ADDR vaddr, unsigned long size, int read, int write, int execute, | |
444 | void *data); | |
445 | ||
446 | static int iterate_over_mappings | |
447 | (procinfo *pi, | |
448 | iterate_over_mappings_cb_ftype *child_func, | |
449 | void *data, | |
450 | int (*func) (struct prmap *map, | |
77382aee PA |
451 | iterate_over_mappings_cb_ftype *child_func, |
452 | void *data)); | |
e9ef4f39 | 453 | |
c3f6f71d JM |
454 | /* The head of the procinfo list: */ |
455 | static procinfo * procinfo_list; | |
c906108c | 456 | |
77382aee PA |
457 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
458 | not found. */ | |
c906108c | 459 | |
19958708 | 460 | static procinfo * |
fba45db2 | 461 | find_procinfo (int pid, int tid) |
c5aa993b | 462 | { |
c3f6f71d | 463 | procinfo *pi; |
c906108c | 464 | |
c3f6f71d JM |
465 | for (pi = procinfo_list; pi; pi = pi->next) |
466 | if (pi->pid == pid) | |
467 | break; | |
c906108c | 468 | |
c3f6f71d JM |
469 | if (pi) |
470 | if (tid) | |
471 | { | |
472 | /* Don't check threads_valid. If we're updating the | |
473 | thread_list, we want to find whatever threads are already | |
474 | here. This means that in general it is the caller's | |
475 | responsibility to check threads_valid and update before | |
476 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 477 | thread. */ |
c3f6f71d JM |
478 | |
479 | for (pi = pi->thread_list; pi; pi = pi->next) | |
480 | if (pi->tid == tid) | |
481 | break; | |
482 | } | |
c906108c | 483 | |
c3f6f71d JM |
484 | return pi; |
485 | } | |
c906108c | 486 | |
77382aee | 487 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 488 | |
c3f6f71d | 489 | static procinfo * |
fba45db2 | 490 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
491 | { |
492 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 493 | |
c3f6f71d | 494 | if (pi == NULL) |
0fda6bd2 JM |
495 | { |
496 | if (tid) | |
77382aee PA |
497 | error (_("\ |
498 | procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
499 | pid, tid); |
500 | else | |
8a3fe4f8 | 501 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 502 | } |
c3f6f71d JM |
503 | return pi; |
504 | } | |
c906108c | 505 | |
77382aee PA |
506 | /* Wrapper for `open'. The appropriate open call is attempted; if |
507 | unsuccessful, it will be retried as many times as needed for the | |
508 | EAGAIN and EINTR conditions. | |
19958708 | 509 | |
77382aee PA |
510 | For other conditions, retry the open a limited number of times. In |
511 | addition, a short sleep is imposed prior to retrying the open. The | |
512 | reason for this sleep is to give the kernel a chance to catch up | |
513 | and create the file in question in the event that GDB "wins" the | |
514 | race to open a file before the kernel has created it. */ | |
19958708 | 515 | |
4d1bcd09 KB |
516 | static int |
517 | open_with_retry (const char *pathname, int flags) | |
518 | { | |
519 | int retries_remaining, status; | |
520 | ||
521 | retries_remaining = 2; | |
522 | ||
523 | while (1) | |
524 | { | |
525 | status = open (pathname, flags); | |
526 | ||
527 | if (status >= 0 || retries_remaining == 0) | |
528 | break; | |
529 | else if (errno != EINTR && errno != EAGAIN) | |
530 | { | |
531 | retries_remaining--; | |
532 | sleep (1); | |
533 | } | |
534 | } | |
535 | ||
536 | return status; | |
537 | } | |
538 | ||
77382aee PA |
539 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
540 | is defined, we only open the control file descriptor; the others | |
541 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
542 | there is only one real file descriptor, but we keep multiple copies | |
543 | of it so that the code that uses them does not have to be #ifdef'd. | |
544 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 545 | |
c3f6f71d | 546 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 547 | |
c3f6f71d | 548 | static int |
fba45db2 | 549 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 550 | { |
0fda6bd2 | 551 | #ifdef NEW_PROC_API |
c3f6f71d | 552 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 553 | #endif |
c3f6f71d JM |
554 | int fd; |
555 | ||
77382aee PA |
556 | /* This function is getting ALMOST long enough to break up into |
557 | several. Here is some rationale: | |
558 | ||
559 | NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
560 | There are several file descriptors that may need to be open | |
561 | for any given process or LWP. The ones we're intereted in are: | |
562 | - control (ctl) write-only change the state | |
563 | - status (status) read-only query the state | |
564 | - address space (as) read/write access memory | |
565 | - map (map) read-only virtual addr map | |
566 | Most of these are opened lazily as they are needed. | |
567 | The pathnames for the 'files' for an LWP look slightly | |
568 | different from those of a first-class process: | |
569 | Pathnames for a process (<proc-id>): | |
570 | /proc/<proc-id>/ctl | |
571 | /proc/<proc-id>/status | |
572 | /proc/<proc-id>/as | |
573 | /proc/<proc-id>/map | |
574 | Pathnames for an LWP (lwp-id): | |
575 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
576 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
577 | An LWP has no map or address space file descriptor, since | |
578 | the memory map and address space are shared by all LWPs. | |
579 | ||
580 | Everyone else (Solaris 2.5, Irix, OSF) | |
581 | There is only one file descriptor for each process or LWP. | |
582 | For convenience, we copy the same file descriptor into all | |
583 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
584 | as_fd, see NEW_PROC_API above) so that code that uses them | |
585 | doesn't need any #ifdef's. | |
586 | Pathname for all: | |
587 | /proc/<proc-id> | |
588 | ||
589 | Solaris 2.5 LWP's: | |
590 | Each LWP has an independent file descriptor, but these | |
591 | are not obtained via the 'open' system call like the rest: | |
592 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
593 | to the file descriptor of the parent process. | |
594 | ||
595 | OSF threads: | |
596 | These do not even have their own independent file descriptor. | |
597 | All operations are carried out on the file descriptor of the | |
598 | parent process. Therefore we just call open again for each | |
599 | thread, getting a new handle for the same 'file'. | |
c3f6f71d JM |
600 | */ |
601 | ||
602 | #ifdef NEW_PROC_API | |
77382aee PA |
603 | /* In this case, there are several different file descriptors that |
604 | we might be asked to open. The control file descriptor will be | |
605 | opened early, but the others will be opened lazily as they are | |
606 | needed. */ | |
c3f6f71d JM |
607 | |
608 | strcpy (tmp, pi->pathname); | |
609 | switch (which) { /* which file descriptor to open? */ | |
610 | case FD_CTL: | |
611 | if (pi->tid) | |
612 | strcat (tmp, "/lwpctl"); | |
613 | else | |
614 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 615 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
616 | if (fd <= 0) |
617 | return 0; /* fail */ | |
618 | pi->ctl_fd = fd; | |
619 | break; | |
620 | case FD_AS: | |
621 | if (pi->tid) | |
622 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
623 | strcat (tmp, "/as"); | |
4d1bcd09 | 624 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
625 | if (fd <= 0) |
626 | return 0; /* fail */ | |
627 | pi->as_fd = fd; | |
628 | break; | |
629 | case FD_STATUS: | |
630 | if (pi->tid) | |
631 | strcat (tmp, "/lwpstatus"); | |
632 | else | |
633 | strcat (tmp, "/status"); | |
4d1bcd09 | 634 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
635 | if (fd <= 0) |
636 | return 0; /* fail */ | |
637 | pi->status_fd = fd; | |
638 | break; | |
639 | default: | |
640 | return 0; /* unknown file descriptor */ | |
641 | } | |
642 | #else /* not NEW_PROC_API */ | |
77382aee PA |
643 | /* In this case, there is only one file descriptor for each procinfo |
644 | (ie. each process or LWP). In fact, only the file descriptor for | |
645 | the process can actually be opened by an 'open' system call. The | |
646 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
647 | process's file descriptor. | |
648 | ||
649 | For convenience, we copy each procinfo's single file descriptor | |
650 | into all of the fields occupied by the several file descriptors | |
651 | of the NEW_PROC_API implementation. That way, the code that uses | |
652 | them can be written without ifdefs. */ | |
c3f6f71d JM |
653 | |
654 | ||
655 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
656 | /* Only one FD; just open it. */ |
657 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
658 | return 0; |
659 | #else /* Sol 2.5, Irix, other? */ | |
660 | if (pi->tid == 0) /* Master procinfo for the process */ | |
661 | { | |
4d1bcd09 | 662 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
663 | if (fd <= 0) |
664 | return 0; /* fail */ | |
665 | } | |
666 | else /* LWP thread procinfo */ | |
667 | { | |
668 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
669 | procinfo *process; | |
670 | int lwpid = pi->tid; | |
671 | ||
672 | /* Find the procinfo for the entire process. */ | |
673 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
674 | return 0; /* fail */ | |
675 | ||
676 | /* Now obtain the file descriptor for the LWP. */ | |
677 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
678 | return 0; /* fail */ | |
679 | #else /* Irix, other? */ | |
680 | return 0; /* Don't know how to open threads */ | |
681 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
682 | } | |
683 | #endif /* OSF PIOCTSTATUS */ | |
684 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
685 | #endif /* NEW_PROC_API */ | |
c906108c | 686 | |
c3f6f71d JM |
687 | return 1; /* success */ |
688 | } | |
c906108c | 689 | |
77382aee PA |
690 | /* Allocate a data structure and link it into the procinfo list. |
691 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
692 | pointer to new procinfo struct. */ | |
c906108c | 693 | |
c3f6f71d | 694 | static procinfo * |
fba45db2 | 695 | create_procinfo (int pid, int tid) |
c3f6f71d | 696 | { |
0b62613e | 697 | procinfo *pi, *parent = NULL; |
c906108c | 698 | |
0d06e24b | 699 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 700 | return pi; /* Already exists, nothing to do. */ |
c906108c | 701 | |
c3f6f71d JM |
702 | /* find parent before doing malloc, to save having to cleanup */ |
703 | if (tid != 0) | |
704 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
705 | create it if it | |
706 | doesn't exist yet? */ | |
c906108c | 707 | |
c3f6f71d JM |
708 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
709 | memset (pi, 0, sizeof (procinfo)); | |
710 | pi->pid = pid; | |
711 | pi->tid = tid; | |
c906108c | 712 | |
37de36c6 KB |
713 | #ifdef DYNAMIC_SYSCALLS |
714 | load_syscalls (pi); | |
715 | #endif | |
716 | ||
1d5e0602 KB |
717 | pi->saved_entryset = sysset_t_alloc (pi); |
718 | pi->saved_exitset = sysset_t_alloc (pi); | |
719 | ||
c3f6f71d JM |
720 | /* Chain into list. */ |
721 | if (tid == 0) | |
722 | { | |
723 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
724 | pi->next = procinfo_list; | |
725 | procinfo_list = pi; | |
726 | } | |
727 | else | |
728 | { | |
729 | #ifdef NEW_PROC_API | |
730 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
731 | #else | |
732 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
733 | #endif | |
734 | pi->next = parent->thread_list; | |
735 | parent->thread_list = pi; | |
736 | } | |
737 | return pi; | |
738 | } | |
c906108c | 739 | |
77382aee | 740 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 741 | |
c3f6f71d | 742 | static void |
fba45db2 | 743 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
744 | { |
745 | if (pi->ctl_fd > 0) | |
746 | close (pi->ctl_fd); | |
747 | #ifdef NEW_PROC_API | |
748 | if (pi->as_fd > 0) | |
749 | close (pi->as_fd); | |
750 | if (pi->status_fd > 0) | |
751 | close (pi->status_fd); | |
752 | #endif | |
753 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
754 | } | |
c906108c | 755 | |
77382aee | 756 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 757 | |
c3f6f71d | 758 | static void |
fba45db2 | 759 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
760 | { |
761 | procinfo *ptr; | |
762 | ||
77382aee | 763 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
764 | if (pi == *list) |
765 | *list = pi->next; | |
19958708 | 766 | else |
c3f6f71d JM |
767 | for (ptr = *list; ptr; ptr = ptr->next) |
768 | if (ptr->next == pi) | |
769 | { | |
770 | ptr->next = pi->next; | |
771 | break; | |
772 | } | |
7a292a7a | 773 | |
77382aee | 774 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 775 | close_procinfo_files (pi); |
7a292a7a | 776 | |
77382aee | 777 | /* Step three: free the memory. */ |
37de36c6 KB |
778 | #ifdef DYNAMIC_SYSCALLS |
779 | free_syscalls (pi); | |
780 | #endif | |
1d5e0602 KB |
781 | xfree (pi->saved_entryset); |
782 | xfree (pi->saved_exitset); | |
b8c9b27d | 783 | xfree (pi); |
c3f6f71d | 784 | } |
c906108c | 785 | |
c3f6f71d | 786 | static void |
fba45db2 | 787 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
788 | { |
789 | procinfo *tmp; | |
c906108c | 790 | |
c3f6f71d JM |
791 | if (pi->tid != 0) /* destroy a thread procinfo */ |
792 | { | |
793 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
794 | destroy_one_procinfo (&tmp->thread_list, pi); | |
795 | } | |
796 | else /* destroy a process procinfo and all its threads */ | |
797 | { | |
798 | /* First destroy the children, if any; */ | |
799 | while (pi->thread_list != NULL) | |
800 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
801 | /* Then destroy the parent. Genocide!!! */ | |
802 | destroy_one_procinfo (&procinfo_list, pi); | |
803 | } | |
804 | } | |
c906108c | 805 | |
004527cb AC |
806 | static void |
807 | do_destroy_procinfo_cleanup (void *pi) | |
808 | { | |
809 | destroy_procinfo (pi); | |
810 | } | |
811 | ||
c3f6f71d | 812 | enum { NOKILL, KILL }; |
c906108c | 813 | |
77382aee PA |
814 | /* To be called on a non_recoverable error for a procinfo. Prints |
815 | error messages, optionally sends a SIGKILL to the process, then | |
816 | destroys the data structure. */ | |
c906108c | 817 | |
c3f6f71d | 818 | static void |
fba45db2 | 819 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
820 | { |
821 | char procfile[80]; | |
c906108c | 822 | |
c3f6f71d JM |
823 | if (pi->pathname) |
824 | { | |
825 | print_sys_errmsg (pi->pathname, errno); | |
826 | } | |
827 | else | |
828 | { | |
829 | sprintf (procfile, "process %d", pi->pid); | |
830 | print_sys_errmsg (procfile, errno); | |
831 | } | |
832 | if (kill_p == KILL) | |
833 | kill (pi->pid, SIGKILL); | |
c906108c | 834 | |
c3f6f71d | 835 | destroy_procinfo (pi); |
0b62613e | 836 | error ("%s", msg); |
c3f6f71d | 837 | } |
c906108c | 838 | |
77382aee PA |
839 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
840 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
841 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
842 | |
843 | static int | |
844 | sysset_t_size (procinfo * pi) | |
845 | { | |
846 | #ifndef DYNAMIC_SYSCALLS | |
847 | return sizeof (sysset_t); | |
848 | #else | |
849 | return sizeof (sysset_t) - sizeof (uint64_t) | |
850 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
851 | / (8 * sizeof (uint64_t))); | |
852 | #endif | |
853 | } | |
854 | ||
77382aee | 855 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
856 | |
857 | static sysset_t * | |
858 | sysset_t_alloc (procinfo * pi) | |
859 | { | |
860 | sysset_t *ret; | |
861 | int size = sysset_t_size (pi); | |
f4a14ae6 | 862 | |
37de36c6 KB |
863 | ret = xmalloc (size); |
864 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
865 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
866 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
867 | #endif |
868 | return ret; | |
869 | } | |
870 | ||
871 | #ifdef DYNAMIC_SYSCALLS | |
872 | ||
77382aee | 873 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
874 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
875 | with the names. (Certain numbers may be skipped in which case the | |
876 | names for these numbers will be left as NULL.) */ | |
877 | ||
878 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
879 | #define MAX_SYSCALLS 65536 | |
880 | ||
881 | static void | |
882 | load_syscalls (procinfo *pi) | |
883 | { | |
884 | char pathname[MAX_PROC_NAME_SIZE]; | |
885 | int sysent_fd; | |
886 | prsysent_t header; | |
887 | prsyscall_t *syscalls; | |
888 | int i, size, maxcall; | |
889 | ||
890 | pi->num_syscalls = 0; | |
891 | pi->syscall_names = 0; | |
892 | ||
77382aee | 893 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 894 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 895 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
896 | if (sysent_fd < 0) |
897 | { | |
8a3fe4f8 | 898 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
899 | } |
900 | ||
901 | size = sizeof header - sizeof (prsyscall_t); | |
902 | if (read (sysent_fd, &header, size) != size) | |
903 | { | |
8a3fe4f8 | 904 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
905 | } |
906 | ||
907 | if (header.pr_nsyscalls == 0) | |
908 | { | |
77382aee PA |
909 | error (_("\ |
910 | load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); | |
37de36c6 KB |
911 | } |
912 | ||
913 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
914 | syscalls = xmalloc (size); | |
915 | ||
916 | if (read (sysent_fd, syscalls, size) != size) | |
917 | { | |
918 | xfree (syscalls); | |
8a3fe4f8 | 919 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
920 | } |
921 | ||
922 | /* Find maximum syscall number. This may not be the same as | |
923 | pr_nsyscalls since that value refers to the number of entries | |
924 | in the table. (Also, the docs indicate that some system | |
925 | call numbers may be skipped.) */ | |
926 | ||
927 | maxcall = syscalls[0].pr_number; | |
928 | ||
929 | for (i = 1; i < header.pr_nsyscalls; i++) | |
930 | if (syscalls[i].pr_number > maxcall | |
77382aee | 931 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
932 | && syscalls[i].pr_number < MAX_SYSCALLS) |
933 | maxcall = syscalls[i].pr_number; | |
934 | ||
935 | pi->num_syscalls = maxcall+1; | |
936 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
937 | ||
938 | for (i = 0; i < pi->num_syscalls; i++) | |
939 | pi->syscall_names[i] = NULL; | |
940 | ||
77382aee | 941 | /* Read the syscall names in. */ |
37de36c6 KB |
942 | for (i = 0; i < header.pr_nsyscalls; i++) |
943 | { | |
944 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
945 | int nread; | |
946 | int callnum; | |
947 | ||
948 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 949 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
950 | || syscalls[i].pr_nameoff <= 0 |
951 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 952 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
953 | continue; |
954 | ||
955 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
956 | if (nread <= 0) | |
957 | continue; | |
958 | ||
959 | callnum = syscalls[i].pr_number; | |
960 | ||
961 | if (pi->syscall_names[callnum] != NULL) | |
962 | { | |
963 | /* FIXME: Generate warning */ | |
964 | continue; | |
965 | } | |
966 | ||
967 | namebuf[nread-1] = '\0'; | |
968 | size = strlen (namebuf) + 1; | |
969 | pi->syscall_names[callnum] = xmalloc (size); | |
970 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
971 | pi->syscall_names[callnum][size-1] = '\0'; | |
972 | } | |
19958708 | 973 | |
37de36c6 KB |
974 | close (sysent_fd); |
975 | xfree (syscalls); | |
976 | } | |
977 | ||
77382aee | 978 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
979 | structure. */ |
980 | ||
981 | static void | |
982 | free_syscalls (procinfo *pi) | |
983 | { | |
984 | if (pi->syscall_names) | |
985 | { | |
986 | int i; | |
987 | ||
988 | for (i = 0; i < pi->num_syscalls; i++) | |
989 | if (pi->syscall_names[i] != NULL) | |
990 | xfree (pi->syscall_names[i]); | |
991 | ||
992 | xfree (pi->syscall_names); | |
993 | pi->syscall_names = 0; | |
994 | } | |
995 | } | |
996 | ||
77382aee | 997 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 998 | If no match is found, return -1. */ |
19958708 | 999 | |
37de36c6 KB |
1000 | static int |
1001 | find_syscall (procinfo *pi, char *name) | |
1002 | { | |
1003 | int i; | |
f4a14ae6 | 1004 | |
37de36c6 KB |
1005 | for (i = 0; i < pi->num_syscalls; i++) |
1006 | { | |
1007 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1008 | return i; | |
1009 | } | |
1010 | return -1; | |
1011 | } | |
1012 | #endif | |
1013 | ||
c3f6f71d | 1014 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1015 | |
c3f6f71d | 1016 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1017 | |
77382aee PA |
1018 | /* This "module" is the interface layer between the /proc system API |
1019 | and the gdb target vector functions. This layer consists of access | |
1020 | functions that encapsulate each of the basic operations that we | |
1021 | need to use from the /proc API. | |
1022 | ||
1023 | The main motivation for this layer is to hide the fact that there | |
1024 | are two very different implementations of the /proc API. Rather | |
1025 | than have a bunch of #ifdefs all thru the gdb target vector | |
1026 | functions, we do our best to hide them all in here. */ | |
c906108c | 1027 | |
a14ed312 KB |
1028 | int proc_get_status (procinfo * pi); |
1029 | long proc_flags (procinfo * pi); | |
1030 | int proc_why (procinfo * pi); | |
1031 | int proc_what (procinfo * pi); | |
1032 | int proc_set_run_on_last_close (procinfo * pi); | |
1033 | int proc_unset_run_on_last_close (procinfo * pi); | |
1034 | int proc_set_inherit_on_fork (procinfo * pi); | |
1035 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1036 | int proc_set_async (procinfo * pi); | |
1037 | int proc_unset_async (procinfo * pi); | |
1038 | int proc_stop_process (procinfo * pi); | |
1039 | int proc_trace_signal (procinfo * pi, int signo); | |
1040 | int proc_ignore_signal (procinfo * pi, int signo); | |
1041 | int proc_clear_current_fault (procinfo * pi); | |
1042 | int proc_set_current_signal (procinfo * pi, int signo); | |
1043 | int proc_clear_current_signal (procinfo * pi); | |
1044 | int proc_set_gregs (procinfo * pi); | |
1045 | int proc_set_fpregs (procinfo * pi); | |
1046 | int proc_wait_for_stop (procinfo * pi); | |
1047 | int proc_run_process (procinfo * pi, int step, int signo); | |
1048 | int proc_kill (procinfo * pi, int signo); | |
1049 | int proc_parent_pid (procinfo * pi); | |
1050 | int proc_get_nthreads (procinfo * pi); | |
1051 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1052 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1053 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1054 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1055 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1056 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1057 | |
1058 | int proc_update_threads (procinfo * pi); | |
1059 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1060 | int (*func) (procinfo *, procinfo *, void *), |
1061 | void *ptr); | |
a14ed312 KB |
1062 | |
1063 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1064 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1065 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1066 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1067 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1068 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1069 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1070 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1071 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1072 | |
1073 | void proc_warn (procinfo * pi, char *func, int line); | |
1074 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1075 | |
c3f6f71d | 1076 | void |
fba45db2 | 1077 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1078 | { |
1079 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1080 | print_sys_errmsg (errmsg, errno); | |
1081 | } | |
c906108c | 1082 | |
c3f6f71d | 1083 | void |
fba45db2 | 1084 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1085 | { |
1086 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1087 | perror_with_name (errmsg); | |
1088 | } | |
c906108c | 1089 | |
77382aee PA |
1090 | /* Updates the status struct in the procinfo. There is a 'valid' |
1091 | flag, to let other functions know when this function needs to be | |
1092 | called (so the status is only read when it is needed). The status | |
1093 | file descriptor is also only opened when it is needed. Returns | |
1094 | non-zero for success, zero for failure. */ | |
c906108c | 1095 | |
c3f6f71d | 1096 | int |
fba45db2 | 1097 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1098 | { |
1099 | /* Status file descriptor is opened "lazily" */ | |
1100 | if (pi->status_fd == 0 && | |
1101 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1102 | { | |
1103 | pi->status_valid = 0; | |
1104 | return 0; | |
1105 | } | |
c906108c | 1106 | |
c3f6f71d JM |
1107 | #ifdef NEW_PROC_API |
1108 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1109 | pi->status_valid = 0; /* fail */ | |
1110 | else | |
1111 | { | |
19958708 | 1112 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1113 | depending on whether this is a main process or an LWP. */ |
1114 | if (pi->tid) | |
19958708 RM |
1115 | pi->status_valid = (read (pi->status_fd, |
1116 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1117 | sizeof (lwpstatus_t)) |
1118 | == sizeof (lwpstatus_t)); | |
1119 | else | |
1120 | { | |
19958708 | 1121 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1122 | (char *) &pi->prstatus, |
1123 | sizeof (gdb_prstatus_t)) | |
1124 | == sizeof (gdb_prstatus_t)); | |
1125 | #if 0 /*def UNIXWARE*/ | |
1126 | if (pi->status_valid && | |
1127 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1128 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1129 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1130 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1131 | (char *) &pi->prstatus, |
1132 | sizeof (gdb_prstatus_t)) | |
1133 | == sizeof (gdb_prstatus_t)); | |
1134 | #endif /* UNIXWARE */ | |
1135 | } | |
1136 | } | |
1137 | #else /* ioctl method */ | |
1138 | #ifdef PIOCTSTATUS /* osf */ | |
1139 | if (pi->tid == 0) /* main process */ | |
1140 | { | |
1141 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1142 | pi->status_valid = |
c3f6f71d JM |
1143 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1144 | } | |
1145 | else | |
1146 | { | |
1147 | int win; | |
1148 | struct { | |
1149 | long pr_count; | |
1150 | tid_t pr_error_thread; | |
1151 | struct prstatus status; | |
1152 | } thread_status; | |
1153 | ||
1154 | thread_status.pr_count = 1; | |
1155 | thread_status.status.pr_tid = pi->tid; | |
1156 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1157 | if (win) | |
1158 | { | |
19958708 | 1159 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1160 | sizeof (pi->prstatus)); |
1161 | pi->status_valid = 1; | |
1162 | } | |
1163 | } | |
1164 | #else | |
77382aee | 1165 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1166 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1167 | #endif | |
1168 | #endif | |
c906108c | 1169 | |
c3f6f71d JM |
1170 | if (pi->status_valid) |
1171 | { | |
19958708 | 1172 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1173 | proc_why (pi), |
19958708 | 1174 | proc_what (pi), |
c3f6f71d JM |
1175 | proc_get_current_thread (pi)); |
1176 | } | |
c906108c | 1177 | |
77382aee | 1178 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1179 | pi->gregs_valid = pi->status_valid; |
1180 | #ifdef NEW_PROC_API | |
77382aee PA |
1181 | /* In the read/write multiple-fd model, the status struct includes |
1182 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1183 | pi->fpregs_valid = pi->status_valid; |
1184 | #endif | |
77382aee | 1185 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1186 | } |
c906108c | 1187 | |
77382aee | 1188 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d JM |
1189 | |
1190 | long | |
fba45db2 | 1191 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1192 | { |
1193 | if (!pi->status_valid) | |
1194 | if (!proc_get_status (pi)) | |
1195 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1196 | |
c3f6f71d | 1197 | #ifdef NEW_PROC_API |
0d06e24b JM |
1198 | # ifdef UNIXWARE |
1199 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1200 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1201 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1202 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1203 | # else | |
c3f6f71d | 1204 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1205 | # endif |
c3f6f71d JM |
1206 | #else |
1207 | return pi->prstatus.pr_flags; | |
1208 | #endif | |
1209 | } | |
c906108c | 1210 | |
77382aee | 1211 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1212 | |
c3f6f71d | 1213 | int |
fba45db2 | 1214 | proc_why (procinfo *pi) |
c3f6f71d JM |
1215 | { |
1216 | if (!pi->status_valid) | |
1217 | if (!proc_get_status (pi)) | |
1218 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1219 | |
c3f6f71d JM |
1220 | #ifdef NEW_PROC_API |
1221 | return pi->prstatus.pr_lwp.pr_why; | |
1222 | #else | |
1223 | return pi->prstatus.pr_why; | |
1224 | #endif | |
1225 | } | |
c906108c | 1226 | |
77382aee | 1227 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1228 | |
c3f6f71d | 1229 | int |
fba45db2 | 1230 | proc_what (procinfo *pi) |
c3f6f71d JM |
1231 | { |
1232 | if (!pi->status_valid) | |
1233 | if (!proc_get_status (pi)) | |
1234 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1235 | |
c3f6f71d JM |
1236 | #ifdef NEW_PROC_API |
1237 | return pi->prstatus.pr_lwp.pr_what; | |
1238 | #else | |
1239 | return pi->prstatus.pr_what; | |
c906108c | 1240 | #endif |
c3f6f71d | 1241 | } |
c906108c | 1242 | |
77382aee PA |
1243 | /* This function is only called when PI is stopped by a watchpoint. |
1244 | Assuming the OS supports it, write to *ADDR the data address which | |
1245 | triggered it and return 1. Return 0 if it is not possible to know | |
1246 | the address. */ | |
bf701c2c PM |
1247 | |
1248 | static int | |
1249 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1250 | { | |
1251 | if (!pi->status_valid) | |
1252 | if (!proc_get_status (pi)) | |
1253 | return 0; | |
1254 | ||
1255 | #ifdef NEW_PROC_API | |
1256 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1257 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1258 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1259 | #else | |
1260 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1261 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1262 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1263 | #endif | |
1264 | return 1; | |
1265 | } | |
1266 | ||
c3f6f71d | 1267 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1268 | |
1269 | /* Returns the pr_nsysarg field (number of args to the current | |
1270 | syscall). */ | |
c3f6f71d JM |
1271 | |
1272 | int | |
fba45db2 | 1273 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1274 | { |
1275 | if (!pi->status_valid) | |
1276 | if (!proc_get_status (pi)) | |
1277 | return 0; | |
19958708 | 1278 | |
c3f6f71d JM |
1279 | #ifdef NEW_PROC_API |
1280 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1281 | #else | |
1282 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1283 | #endif |
c3f6f71d | 1284 | } |
c906108c | 1285 | |
77382aee PA |
1286 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1287 | syscall). */ | |
c906108c | 1288 | |
c3f6f71d | 1289 | long * |
fba45db2 | 1290 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1291 | { |
1292 | if (!pi->status_valid) | |
1293 | if (!proc_get_status (pi)) | |
1294 | return NULL; | |
19958708 | 1295 | |
c3f6f71d JM |
1296 | #ifdef NEW_PROC_API |
1297 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1298 | #else | |
1299 | return (long *) &pi->prstatus.pr_sysarg; | |
1300 | #endif | |
1301 | } | |
c906108c | 1302 | |
77382aee PA |
1303 | /* Returns the pr_syscall field (id of current syscall if we are in |
1304 | one). */ | |
c906108c | 1305 | |
c3f6f71d | 1306 | int |
fba45db2 | 1307 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1308 | { |
1309 | if (!pi->status_valid) | |
1310 | if (!proc_get_status (pi)) | |
1311 | return 0; | |
19958708 | 1312 | |
c3f6f71d JM |
1313 | #ifdef NEW_PROC_API |
1314 | return pi->prstatus.pr_lwp.pr_syscall; | |
1315 | #else | |
1316 | return pi->prstatus.pr_syscall; | |
1317 | #endif | |
1318 | } | |
1319 | #endif /* PIOCSSPCACT */ | |
c906108c | 1320 | |
77382aee | 1321 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1322 | |
c3f6f71d JM |
1323 | long |
1324 | proc_cursig (struct procinfo *pi) | |
1325 | { | |
1326 | if (!pi->status_valid) | |
1327 | if (!proc_get_status (pi)) | |
1328 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1329 | |
c3f6f71d JM |
1330 | #ifdef NEW_PROC_API |
1331 | return pi->prstatus.pr_lwp.pr_cursig; | |
1332 | #else | |
1333 | return pi->prstatus.pr_cursig; | |
1334 | #endif | |
1335 | } | |
c906108c | 1336 | |
77382aee PA |
1337 | /* === I appologize for the messiness of this function. |
1338 | === This is an area where the different versions of | |
1339 | === /proc are more inconsistent than usual. | |
1340 | ||
1341 | Set or reset any of the following process flags: | |
1342 | PR_FORK -- forked child will inherit trace flags | |
1343 | PR_RLC -- traced process runs when last /proc file closed. | |
1344 | PR_KLC -- traced process is killed when last /proc file closed. | |
1345 | PR_ASYNC -- LWP's get to run/stop independently. | |
1346 | ||
1347 | There are three methods for doing this function: | |
1348 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1349 | [Sol6, Sol7, UW] | |
1350 | 2) Middle: PIOCSET/PIOCRESET | |
1351 | [Irix, Sol5] | |
1352 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1353 | [OSF, Sol5] | |
1354 | ||
1355 | Note: Irix does not define PR_ASYNC. | |
1356 | Note: OSF does not define PR_KLC. | |
1357 | Note: OSF is the only one that can ONLY use the oldest method. | |
1358 | ||
1359 | Arguments: | |
1360 | pi -- the procinfo | |
1361 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1362 | mode -- 1 for set, 0 for reset. | |
1363 | ||
1364 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1365 | |
c3f6f71d | 1366 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1367 | |
c3f6f71d | 1368 | static int |
fba45db2 | 1369 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1370 | { |
1371 | long win = 0; /* default to fail */ | |
1372 | ||
77382aee PA |
1373 | /* These operations affect the process as a whole, and applying them |
1374 | to an individual LWP has the same meaning as applying them to the | |
1375 | main process. Therefore, if we're ever called with a pointer to | |
1376 | an LWP's procinfo, let's substitute the process's procinfo and | |
1377 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1378 | |
1379 | if (pi->pid != 0) | |
1380 | pi = find_procinfo_or_die (pi->pid, 0); | |
1381 | ||
1382 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1383 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1384 | (which for no obvious reason has a different definition |
1385 | from one operating system to the next...) */ | |
1386 | #ifdef PCUNSET | |
1387 | #define GDBRESET PCUNSET | |
37de36c6 | 1388 | #else |
c3f6f71d JM |
1389 | #ifdef PCRESET |
1390 | #define GDBRESET PCRESET | |
37de36c6 | 1391 | #endif |
c906108c | 1392 | #endif |
c3f6f71d | 1393 | { |
37de36c6 | 1394 | procfs_ctl_t arg[2]; |
c906108c | 1395 | |
c3f6f71d JM |
1396 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1397 | arg[0] = PCSET; | |
1398 | else /* Reset the flag */ | |
1399 | arg[0] = GDBRESET; | |
c5aa993b | 1400 | |
c3f6f71d JM |
1401 | arg[1] = flag; |
1402 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1403 | } | |
1404 | #else | |
1405 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1406 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1407 | { | |
1408 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1409 | } | |
1410 | else /* Reset the flag */ | |
1411 | { | |
1412 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1413 | } | |
c906108c | 1414 | |
c3f6f71d JM |
1415 | #else |
1416 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1417 | switch (flag) { | |
1418 | case PR_RLC: | |
1419 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1420 | { | |
1421 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1422 | } | |
1423 | else /* Clear run-on-last-close */ | |
1424 | { | |
1425 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1426 | } | |
1427 | break; | |
1428 | case PR_FORK: | |
1429 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1430 | { | |
1431 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1432 | } | |
1433 | else /* Clear inherit-on-fork */ | |
1434 | { | |
1435 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1436 | } | |
1437 | break; | |
1438 | default: | |
1439 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1440 | break; | |
1441 | } | |
1442 | #endif | |
1443 | #endif | |
1444 | #endif | |
1445 | #undef GDBRESET | |
77382aee PA |
1446 | /* The above operation renders the procinfo's cached pstatus |
1447 | obsolete. */ | |
c3f6f71d | 1448 | pi->status_valid = 0; |
c906108c | 1449 | |
c3f6f71d | 1450 | if (!win) |
8a3fe4f8 | 1451 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1452 | flag == PR_FORK ? "PR_FORK" : |
1453 | flag == PR_RLC ? "PR_RLC" : | |
1454 | #ifdef PR_ASYNC | |
1455 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1456 | #endif |
1457 | #ifdef PR_KLC | |
1458 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1459 | #endif |
1460 | "<unknown flag>", | |
1461 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1462 | |
c3f6f71d JM |
1463 | return win; |
1464 | } | |
c906108c | 1465 | |
77382aee PA |
1466 | /* Set the run_on_last_close flag. Process with all threads will |
1467 | become runnable when debugger closes all /proc fds. Returns | |
1468 | non-zero for success, zero for failure. */ | |
c906108c | 1469 | |
c3f6f71d | 1470 | int |
fba45db2 | 1471 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1472 | { |
c3f6f71d JM |
1473 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1474 | } | |
c906108c | 1475 | |
77382aee PA |
1476 | /* Reset the run_on_last_close flag. The process will NOT become |
1477 | runnable when debugger closes its file handles. Returns non-zero | |
1478 | for success, zero for failure. */ | |
c906108c | 1479 | |
c3f6f71d | 1480 | int |
fba45db2 | 1481 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1482 | { |
1483 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1484 | } |
1485 | ||
0d06e24b | 1486 | #ifdef PR_KLC |
77382aee PA |
1487 | /* Set the kill_on_last_close flag. Process with all threads will be |
1488 | killed when debugger closes all /proc fds (or debugger exits or | |
1489 | dies). Returns non-zero for success, zero for failure. */ | |
0d06e24b JM |
1490 | |
1491 | int | |
fba45db2 | 1492 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1493 | { |
1494 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1495 | } | |
1496 | ||
77382aee PA |
1497 | /* Reset the kill_on_last_close flag. Process will NOT be killed when |
1498 | debugger closes its file handles (or exits or dies). Returns | |
1499 | non-zero for success, zero for failure. */ | |
0d06e24b JM |
1500 | |
1501 | int | |
fba45db2 | 1502 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1503 | { |
1504 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1505 | } | |
1506 | #endif /* PR_KLC */ | |
1507 | ||
77382aee PA |
1508 | /* Set inherit_on_fork flag. If the process forks a child while we |
1509 | are registered for events in the parent, then we will also recieve | |
1510 | events from the child. Returns non-zero for success, zero for | |
1511 | failure. */ | |
c906108c | 1512 | |
c3f6f71d | 1513 | int |
fba45db2 | 1514 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1515 | { |
1516 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1517 | } | |
c5aa993b | 1518 | |
77382aee PA |
1519 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1520 | are registered for events in the parent, then we will NOT recieve | |
1521 | events from the child. Returns non-zero for success, zero for | |
1522 | failure. */ | |
c906108c | 1523 | |
c3f6f71d | 1524 | int |
fba45db2 | 1525 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1526 | { |
1527 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1528 | } | |
c906108c | 1529 | |
c3f6f71d | 1530 | #ifdef PR_ASYNC |
77382aee PA |
1531 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1532 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1533 | non-zero for success, zero for failure. */ | |
c906108c | 1534 | |
c3f6f71d | 1535 | int |
fba45db2 | 1536 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1537 | { |
1538 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1539 | } | |
c906108c | 1540 | |
77382aee PA |
1541 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1542 | (signal etc.), then all other LWPs will stop as well. Returns | |
1543 | non-zero for success, zero for failure. */ | |
c906108c | 1544 | |
c3f6f71d | 1545 | int |
fba45db2 | 1546 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1547 | { |
1548 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1549 | } | |
1550 | #endif /* PR_ASYNC */ | |
c906108c | 1551 | |
77382aee PA |
1552 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1553 | for success, zero for failure. */ | |
c906108c | 1554 | |
c3f6f71d | 1555 | int |
fba45db2 | 1556 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1557 | { |
1558 | int win; | |
c906108c | 1559 | |
77382aee PA |
1560 | /* We might conceivably apply this operation to an LWP, and the |
1561 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1562 | |
c3f6f71d JM |
1563 | if (pi->ctl_fd == 0 && |
1564 | open_procinfo_files (pi, FD_CTL) == 0) | |
1565 | return 0; | |
1566 | else | |
1567 | { | |
1568 | #ifdef NEW_PROC_API | |
37de36c6 | 1569 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1570 | |
c3f6f71d JM |
1571 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1572 | #else /* ioctl method */ | |
1573 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1574 | /* Note: the call also reads the prstatus. */ | |
1575 | if (win) | |
1576 | { | |
1577 | pi->status_valid = 1; | |
19958708 | 1578 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1579 | proc_why (pi), |
19958708 | 1580 | proc_what (pi), |
c3f6f71d JM |
1581 | proc_get_current_thread (pi)); |
1582 | } | |
1583 | #endif | |
1584 | } | |
c906108c | 1585 | |
c3f6f71d JM |
1586 | return win; |
1587 | } | |
c5aa993b | 1588 | |
77382aee PA |
1589 | /* Wait for the process or LWP to stop (block until it does). Returns |
1590 | non-zero for success, zero for failure. */ | |
c906108c | 1591 | |
c3f6f71d | 1592 | int |
fba45db2 | 1593 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1594 | { |
c3f6f71d JM |
1595 | int win; |
1596 | ||
77382aee PA |
1597 | /* We should never have to apply this operation to any procinfo |
1598 | except the one for the main process. If that ever changes for | |
1599 | any reason, then take out the following clause and replace it | |
1600 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1601 | |
c3f6f71d JM |
1602 | if (pi->tid != 0) |
1603 | pi = find_procinfo_or_die (pi->pid, 0); | |
1604 | ||
1605 | #ifdef NEW_PROC_API | |
1606 | { | |
37de36c6 | 1607 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1608 | |
c3f6f71d JM |
1609 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1610 | /* We been runnin' and we stopped -- need to update status. */ | |
1611 | pi->status_valid = 0; | |
1612 | } | |
1613 | #else /* ioctl method */ | |
1614 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1615 | /* Above call also refreshes the prstatus. */ | |
1616 | if (win) | |
1617 | { | |
1618 | pi->status_valid = 1; | |
19958708 | 1619 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1620 | proc_why (pi), |
19958708 | 1621 | proc_what (pi), |
c3f6f71d JM |
1622 | proc_get_current_thread (pi)); |
1623 | } | |
c906108c SS |
1624 | #endif |
1625 | ||
c3f6f71d | 1626 | return win; |
c906108c SS |
1627 | } |
1628 | ||
77382aee PA |
1629 | /* Make the process or LWP runnable. |
1630 | ||
1631 | Options (not all are implemented): | |
1632 | - single-step | |
1633 | - clear current fault | |
1634 | - clear current signal | |
1635 | - abort the current system call | |
1636 | - stop as soon as finished with system call | |
1637 | - (ioctl): set traced signal set | |
1638 | - (ioctl): set held signal set | |
1639 | - (ioctl): set traced fault set | |
1640 | - (ioctl): set start pc (vaddr) | |
1641 | ||
1642 | Always clears the current fault. PI is the process or LWP to | |
1643 | operate on. If STEP is true, set the process or LWP to trap after | |
1644 | one instruction. If SIGNO is zero, clear the current signal if | |
1645 | any; if non-zero, set the current signal to this one. Returns | |
1646 | non-zero for success, zero for failure. */ | |
c3f6f71d JM |
1647 | |
1648 | int | |
fba45db2 | 1649 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1650 | { |
1651 | int win; | |
1652 | int runflags; | |
1653 | ||
77382aee PA |
1654 | /* We will probably have to apply this operation to individual |
1655 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1656 | |
c3f6f71d JM |
1657 | if (pi->ctl_fd == 0 && |
1658 | open_procinfo_files (pi, FD_CTL) == 0) | |
1659 | { | |
1660 | return 0; | |
1661 | } | |
c906108c | 1662 | |
c3f6f71d JM |
1663 | runflags = PRCFAULT; /* always clear current fault */ |
1664 | if (step) | |
1665 | runflags |= PRSTEP; | |
1666 | if (signo == 0) | |
1667 | runflags |= PRCSIG; | |
1668 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1669 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1670 | |
c3f6f71d JM |
1671 | #ifdef NEW_PROC_API |
1672 | { | |
37de36c6 | 1673 | procfs_ctl_t cmd[2]; |
c906108c | 1674 | |
c3f6f71d JM |
1675 | cmd[0] = PCRUN; |
1676 | cmd[1] = runflags; | |
1677 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1678 | } | |
1679 | #else /* ioctl method */ | |
1680 | { | |
1681 | prrun_t prrun; | |
c906108c | 1682 | |
c3f6f71d JM |
1683 | memset (&prrun, 0, sizeof (prrun)); |
1684 | prrun.pr_flags = runflags; | |
1685 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1686 | } | |
1687 | #endif | |
c906108c | 1688 | |
c3f6f71d JM |
1689 | return win; |
1690 | } | |
c906108c | 1691 | |
77382aee PA |
1692 | /* Register to trace signals in the process or LWP. Returns non-zero |
1693 | for success, zero for failure. */ | |
c906108c | 1694 | |
c3f6f71d | 1695 | int |
37de36c6 | 1696 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1697 | { |
c3f6f71d JM |
1698 | int win; |
1699 | ||
77382aee PA |
1700 | /* We should never have to apply this operation to any procinfo |
1701 | except the one for the main process. If that ever changes for | |
1702 | any reason, then take out the following clause and replace it | |
1703 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1704 | |
c3f6f71d JM |
1705 | if (pi->tid != 0) |
1706 | pi = find_procinfo_or_die (pi->pid, 0); | |
1707 | ||
1708 | #ifdef NEW_PROC_API | |
1709 | { | |
1710 | struct { | |
37de36c6 | 1711 | procfs_ctl_t cmd; |
c3f6f71d | 1712 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1713 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1714 | } arg; |
c906108c | 1715 | |
c3f6f71d | 1716 | arg.cmd = PCSTRACE; |
37de36c6 | 1717 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1718 | |
c3f6f71d JM |
1719 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1720 | } | |
1721 | #else /* ioctl method */ | |
1722 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1723 | #endif | |
1724 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1725 | pi->status_valid = 0; | |
c906108c | 1726 | |
c3f6f71d | 1727 | if (!win) |
8a3fe4f8 | 1728 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1729 | return win; |
c906108c SS |
1730 | } |
1731 | ||
77382aee PA |
1732 | /* Register to trace hardware faults in the process or LWP. Returns |
1733 | non-zero for success, zero for failure. */ | |
c906108c | 1734 | |
c3f6f71d | 1735 | int |
fba45db2 | 1736 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1737 | { |
1738 | int win; | |
1739 | ||
77382aee PA |
1740 | /* We should never have to apply this operation to any procinfo |
1741 | except the one for the main process. If that ever changes for | |
1742 | any reason, then take out the following clause and replace it | |
1743 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1744 | |
c3f6f71d JM |
1745 | if (pi->tid != 0) |
1746 | pi = find_procinfo_or_die (pi->pid, 0); | |
1747 | ||
1748 | #ifdef NEW_PROC_API | |
1749 | { | |
1750 | struct { | |
37de36c6 | 1751 | procfs_ctl_t cmd; |
c3f6f71d JM |
1752 | /* Use char array to avoid alignment issues. */ |
1753 | char fltset[sizeof (fltset_t)]; | |
1754 | } arg; | |
c906108c | 1755 | |
c3f6f71d JM |
1756 | arg.cmd = PCSFAULT; |
1757 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1758 | |
c3f6f71d JM |
1759 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1760 | } | |
1761 | #else /* ioctl method */ | |
1762 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1763 | #endif | |
1764 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1765 | pi->status_valid = 0; | |
c906108c | 1766 | |
c3f6f71d JM |
1767 | return win; |
1768 | } | |
c5aa993b | 1769 | |
77382aee PA |
1770 | /* Register to trace entry to system calls in the process or LWP. |
1771 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1772 | |
c3f6f71d | 1773 | int |
fba45db2 | 1774 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1775 | { |
c3f6f71d JM |
1776 | int win; |
1777 | ||
77382aee PA |
1778 | /* We should never have to apply this operation to any procinfo |
1779 | except the one for the main process. If that ever changes for | |
1780 | any reason, then take out the following clause and replace it | |
1781 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1782 | |
c3f6f71d JM |
1783 | if (pi->tid != 0) |
1784 | pi = find_procinfo_or_die (pi->pid, 0); | |
1785 | ||
1786 | #ifdef NEW_PROC_API | |
1787 | { | |
37de36c6 KB |
1788 | struct gdb_proc_ctl_pcsentry { |
1789 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1790 | /* Use char array to avoid alignment issues. */ |
1791 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1792 | } *argp; |
1793 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1794 | - sizeof (sysset_t) |
37de36c6 | 1795 | + sysset_t_size (pi); |
c3f6f71d | 1796 | |
37de36c6 | 1797 | argp = xmalloc (argp_size); |
c3f6f71d | 1798 | |
37de36c6 KB |
1799 | argp->cmd = PCSENTRY; |
1800 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1801 | ||
1802 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1803 | xfree (argp); | |
c3f6f71d JM |
1804 | } |
1805 | #else /* ioctl method */ | |
1806 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1807 | #endif | |
77382aee PA |
1808 | /* The above operation renders the procinfo's cached pstatus |
1809 | obsolete. */ | |
c3f6f71d | 1810 | pi->status_valid = 0; |
19958708 | 1811 | |
c3f6f71d | 1812 | return win; |
c906108c SS |
1813 | } |
1814 | ||
77382aee PA |
1815 | /* Register to trace exit from system calls in the process or LWP. |
1816 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1817 | |
c3f6f71d | 1818 | int |
fba45db2 | 1819 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1820 | { |
1821 | int win; | |
1822 | ||
77382aee PA |
1823 | /* We should never have to apply this operation to any procinfo |
1824 | except the one for the main process. If that ever changes for | |
1825 | any reason, then take out the following clause and replace it | |
1826 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1827 | |
c3f6f71d JM |
1828 | if (pi->tid != 0) |
1829 | pi = find_procinfo_or_die (pi->pid, 0); | |
1830 | ||
1831 | #ifdef NEW_PROC_API | |
1832 | { | |
37de36c6 KB |
1833 | struct gdb_proc_ctl_pcsexit { |
1834 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1835 | /* Use char array to avoid alignment issues. */ |
1836 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1837 | } *argp; |
1838 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1839 | - sizeof (sysset_t) |
37de36c6 | 1840 | + sysset_t_size (pi); |
c906108c | 1841 | |
37de36c6 | 1842 | argp = xmalloc (argp_size); |
c906108c | 1843 | |
37de36c6 KB |
1844 | argp->cmd = PCSEXIT; |
1845 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1846 | ||
1847 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1848 | xfree (argp); | |
c3f6f71d JM |
1849 | } |
1850 | #else /* ioctl method */ | |
1851 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1852 | #endif | |
77382aee PA |
1853 | /* The above operation renders the procinfo's cached pstatus |
1854 | obsolete. */ | |
c3f6f71d | 1855 | pi->status_valid = 0; |
c906108c | 1856 | |
c3f6f71d JM |
1857 | return win; |
1858 | } | |
c906108c | 1859 | |
77382aee PA |
1860 | /* Specify the set of blocked / held signals in the process or LWP. |
1861 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1862 | |
c3f6f71d | 1863 | int |
37de36c6 | 1864 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1865 | { |
c3f6f71d JM |
1866 | int win; |
1867 | ||
77382aee PA |
1868 | /* We should never have to apply this operation to any procinfo |
1869 | except the one for the main process. If that ever changes for | |
1870 | any reason, then take out the following clause and replace it | |
1871 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1872 | |
c3f6f71d JM |
1873 | if (pi->tid != 0) |
1874 | pi = find_procinfo_or_die (pi->pid, 0); | |
1875 | ||
1876 | #ifdef NEW_PROC_API | |
1877 | { | |
1878 | struct { | |
37de36c6 | 1879 | procfs_ctl_t cmd; |
c3f6f71d | 1880 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1881 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1882 | } arg; |
1883 | ||
1884 | arg.cmd = PCSHOLD; | |
37de36c6 | 1885 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1886 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1887 | } | |
c906108c | 1888 | #else |
c3f6f71d | 1889 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1890 | #endif |
77382aee PA |
1891 | /* The above operation renders the procinfo's cached pstatus |
1892 | obsolete. */ | |
c3f6f71d JM |
1893 | pi->status_valid = 0; |
1894 | ||
1895 | return win; | |
c906108c SS |
1896 | } |
1897 | ||
77382aee PA |
1898 | /* Returns the set of signals that are pending in the process or LWP. |
1899 | Will also copy the sigset if SAVE is non-zero. */ | |
c906108c | 1900 | |
37de36c6 KB |
1901 | gdb_sigset_t * |
1902 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1903 | { |
37de36c6 | 1904 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1905 | |
77382aee PA |
1906 | /* We should never have to apply this operation to any procinfo |
1907 | except the one for the main process. If that ever changes for | |
1908 | any reason, then take out the following clause and replace it | |
1909 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1910 | |
c3f6f71d JM |
1911 | if (pi->tid != 0) |
1912 | pi = find_procinfo_or_die (pi->pid, 0); | |
1913 | ||
1914 | if (!pi->status_valid) | |
1915 | if (!proc_get_status (pi)) | |
1916 | return NULL; | |
1917 | ||
1918 | #ifdef NEW_PROC_API | |
1919 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1920 | #else | |
1921 | ret = &pi->prstatus.pr_sigpend; | |
1922 | #endif | |
1923 | if (save && ret) | |
37de36c6 | 1924 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1925 | |
c3f6f71d JM |
1926 | return ret; |
1927 | } | |
c906108c | 1928 | |
77382aee PA |
1929 | /* Returns the set of signal actions. Will also copy the sigactionset |
1930 | if SAVE is non-zero. */ | |
c906108c | 1931 | |
37de36c6 KB |
1932 | gdb_sigaction_t * |
1933 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 1934 | { |
37de36c6 | 1935 | gdb_sigaction_t *ret = NULL; |
c3f6f71d | 1936 | |
77382aee PA |
1937 | /* We should never have to apply this operation to any procinfo |
1938 | except the one for the main process. If that ever changes for | |
1939 | any reason, then take out the following clause and replace it | |
1940 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1941 | |
c3f6f71d JM |
1942 | if (pi->tid != 0) |
1943 | pi = find_procinfo_or_die (pi->pid, 0); | |
1944 | ||
1945 | if (!pi->status_valid) | |
1946 | if (!proc_get_status (pi)) | |
1947 | return NULL; | |
1948 | ||
1949 | #ifdef NEW_PROC_API | |
1950 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1951 | #else | |
1952 | ret = &pi->prstatus.pr_action; | |
1953 | #endif | |
1954 | if (save && ret) | |
37de36c6 | 1955 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 1956 | |
c3f6f71d JM |
1957 | return ret; |
1958 | } | |
c5aa993b | 1959 | |
77382aee PA |
1960 | /* Returns the set of signals that are held / blocked. Will also copy |
1961 | the sigset if SAVE is non-zero. */ | |
c906108c | 1962 | |
37de36c6 KB |
1963 | gdb_sigset_t * |
1964 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1965 | { |
37de36c6 | 1966 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1967 | |
77382aee PA |
1968 | /* We should never have to apply this operation to any procinfo |
1969 | except the one for the main process. If that ever changes for | |
1970 | any reason, then take out the following clause and replace it | |
1971 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1972 | |
c3f6f71d JM |
1973 | if (pi->tid != 0) |
1974 | pi = find_procinfo_or_die (pi->pid, 0); | |
1975 | ||
1976 | #ifdef NEW_PROC_API | |
1977 | if (!pi->status_valid) | |
1978 | if (!proc_get_status (pi)) | |
1979 | return NULL; | |
1980 | ||
1981 | #ifdef UNIXWARE | |
1982 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1983 | #else |
c3f6f71d JM |
1984 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1985 | #endif /* UNIXWARE */ | |
1986 | #else /* not NEW_PROC_API */ | |
1987 | { | |
37de36c6 | 1988 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1989 | |
1990 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1991 | ret = &sigheld; | |
1992 | } | |
1993 | #endif /* NEW_PROC_API */ | |
1994 | if (save && ret) | |
37de36c6 | 1995 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1996 | |
1997 | return ret; | |
c906108c SS |
1998 | } |
1999 | ||
77382aee PA |
2000 | /* Returns the set of signals that are traced / debugged. Will also |
2001 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 2002 | |
37de36c6 KB |
2003 | gdb_sigset_t * |
2004 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2005 | { |
37de36c6 | 2006 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 2007 | |
77382aee PA |
2008 | /* We should never have to apply this operation to any procinfo |
2009 | except the one for the main process. If that ever changes for | |
2010 | any reason, then take out the following clause and replace it | |
2011 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2012 | |
c3f6f71d JM |
2013 | if (pi->tid != 0) |
2014 | pi = find_procinfo_or_die (pi->pid, 0); | |
2015 | ||
2016 | #ifdef NEW_PROC_API | |
2017 | if (!pi->status_valid) | |
2018 | if (!proc_get_status (pi)) | |
2019 | return NULL; | |
2020 | ||
2021 | ret = &pi->prstatus.pr_sigtrace; | |
2022 | #else | |
2023 | { | |
37de36c6 | 2024 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2025 | |
2026 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2027 | ret = &sigtrace; | |
2028 | } | |
c906108c | 2029 | #endif |
c3f6f71d | 2030 | if (save && ret) |
37de36c6 | 2031 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2032 | |
c3f6f71d JM |
2033 | return ret; |
2034 | } | |
c906108c | 2035 | |
77382aee PA |
2036 | /* Add SIGNO to the set of signals that are traced. Returns non-zero |
2037 | for success, zero for failure. */ | |
c906108c | 2038 | |
c3f6f71d | 2039 | int |
fba45db2 | 2040 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2041 | { |
37de36c6 | 2042 | gdb_sigset_t temp; |
c3f6f71d | 2043 | |
77382aee PA |
2044 | /* We should never have to apply this operation to any procinfo |
2045 | except the one for the main process. If that ever changes for | |
2046 | any reason, then take out the following clause and replace it | |
2047 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2048 | |
c3f6f71d JM |
2049 | if (pi->tid != 0) |
2050 | pi = find_procinfo_or_die (pi->pid, 0); | |
2051 | ||
2052 | if (pi) | |
c906108c | 2053 | { |
c3f6f71d | 2054 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2055 | { |
3c95f01c | 2056 | gdb_praddset (&temp, signo); |
c3f6f71d | 2057 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2058 | } |
2059 | } | |
c5aa993b | 2060 | |
c3f6f71d JM |
2061 | return 0; /* failure */ |
2062 | } | |
c906108c | 2063 | |
77382aee PA |
2064 | /* Remove SIGNO from the set of signals that are traced. Returns |
2065 | non-zero for success, zero for failure. */ | |
c906108c | 2066 | |
c3f6f71d | 2067 | int |
fba45db2 | 2068 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2069 | { |
37de36c6 | 2070 | gdb_sigset_t temp; |
c3f6f71d | 2071 | |
77382aee PA |
2072 | /* We should never have to apply this operation to any procinfo |
2073 | except the one for the main process. If that ever changes for | |
2074 | any reason, then take out the following clause and replace it | |
2075 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2076 | |
c3f6f71d JM |
2077 | if (pi->tid != 0) |
2078 | pi = find_procinfo_or_die (pi->pid, 0); | |
2079 | ||
2080 | if (pi) | |
c906108c | 2081 | { |
c3f6f71d | 2082 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2083 | { |
3c95f01c | 2084 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2085 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2086 | } |
c906108c | 2087 | } |
c906108c | 2088 | |
c3f6f71d | 2089 | return 0; /* failure */ |
c906108c SS |
2090 | } |
2091 | ||
77382aee PA |
2092 | /* Returns the set of hardware faults that are traced /debugged. Will |
2093 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d JM |
2094 | |
2095 | fltset_t * | |
fba45db2 | 2096 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2097 | { |
2098 | fltset_t *ret = NULL; | |
2099 | ||
77382aee PA |
2100 | /* We should never have to apply this operation to any procinfo |
2101 | except the one for the main process. If that ever changes for | |
2102 | any reason, then take out the following clause and replace it | |
2103 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2104 | |
c3f6f71d JM |
2105 | if (pi->tid != 0) |
2106 | pi = find_procinfo_or_die (pi->pid, 0); | |
2107 | ||
2108 | #ifdef NEW_PROC_API | |
2109 | if (!pi->status_valid) | |
2110 | if (!proc_get_status (pi)) | |
2111 | return NULL; | |
2112 | ||
2113 | ret = &pi->prstatus.pr_flttrace; | |
2114 | #else | |
2115 | { | |
2116 | static fltset_t flttrace; | |
2117 | ||
2118 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2119 | ret = &flttrace; | |
2120 | } | |
2121 | #endif | |
2122 | if (save && ret) | |
2123 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2124 | |
c3f6f71d JM |
2125 | return ret; |
2126 | } | |
c906108c | 2127 | |
77382aee PA |
2128 | /* Returns the set of syscalls that are traced /debugged on entry. |
2129 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2130 | |
c3f6f71d | 2131 | sysset_t * |
fba45db2 | 2132 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2133 | { |
2134 | sysset_t *ret = NULL; | |
2135 | ||
77382aee PA |
2136 | /* We should never have to apply this operation to any procinfo |
2137 | except the one for the main process. If that ever changes for | |
2138 | any reason, then take out the following clause and replace it | |
2139 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2140 | |
c3f6f71d JM |
2141 | if (pi->tid != 0) |
2142 | pi = find_procinfo_or_die (pi->pid, 0); | |
2143 | ||
2144 | #ifdef NEW_PROC_API | |
2145 | if (!pi->status_valid) | |
2146 | if (!proc_get_status (pi)) | |
2147 | return NULL; | |
2148 | ||
37de36c6 | 2149 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2150 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2151 | #else /* DYNAMIC_SYSCALLS */ |
2152 | { | |
2153 | static sysset_t *sysentry; | |
2154 | size_t size; | |
2155 | ||
2156 | if (!sysentry) | |
2157 | sysentry = sysset_t_alloc (pi); | |
2158 | ret = sysentry; | |
2159 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2160 | return NULL; | |
2161 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2162 | { | |
2163 | gdb_premptysysset (sysentry); | |
2164 | } | |
2165 | else | |
2166 | { | |
2167 | int rsize; | |
2168 | ||
2169 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 2170 | SEEK_SET) |
37de36c6 KB |
2171 | != (off_t) pi->prstatus.pr_sysentry_offset) |
2172 | return NULL; | |
2173 | size = sysset_t_size (pi); | |
2174 | gdb_premptysysset (sysentry); | |
2175 | rsize = read (pi->status_fd, sysentry, size); | |
2176 | if (rsize < 0) | |
2177 | return NULL; | |
2178 | } | |
2179 | } | |
2180 | #endif /* DYNAMIC_SYSCALLS */ | |
2181 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2182 | { |
2183 | static sysset_t sysentry; | |
c906108c | 2184 | |
c3f6f71d JM |
2185 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2186 | ret = &sysentry; | |
2187 | } | |
37de36c6 | 2188 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2189 | if (save && ret) |
37de36c6 | 2190 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2191 | |
c3f6f71d JM |
2192 | return ret; |
2193 | } | |
c5aa993b | 2194 | |
77382aee PA |
2195 | /* Returns the set of syscalls that are traced /debugged on exit. |
2196 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2197 | |
c3f6f71d | 2198 | sysset_t * |
fba45db2 | 2199 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2200 | { |
c3f6f71d JM |
2201 | sysset_t * ret = NULL; |
2202 | ||
77382aee PA |
2203 | /* We should never have to apply this operation to any procinfo |
2204 | except the one for the main process. If that ever changes for | |
2205 | any reason, then take out the following clause and replace it | |
2206 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2207 | |
c3f6f71d JM |
2208 | if (pi->tid != 0) |
2209 | pi = find_procinfo_or_die (pi->pid, 0); | |
2210 | ||
2211 | #ifdef NEW_PROC_API | |
2212 | if (!pi->status_valid) | |
2213 | if (!proc_get_status (pi)) | |
2214 | return NULL; | |
2215 | ||
37de36c6 | 2216 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2217 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2218 | #else /* DYNAMIC_SYSCALLS */ |
2219 | { | |
2220 | static sysset_t *sysexit; | |
2221 | size_t size; | |
2222 | ||
2223 | if (!sysexit) | |
2224 | sysexit = sysset_t_alloc (pi); | |
2225 | ret = sysexit; | |
2226 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2227 | return NULL; | |
2228 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2229 | { | |
2230 | gdb_premptysysset (sysexit); | |
2231 | } | |
2232 | else | |
2233 | { | |
2234 | int rsize; | |
2235 | ||
77382aee PA |
2236 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2237 | SEEK_SET) | |
37de36c6 KB |
2238 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2239 | return NULL; | |
2240 | size = sysset_t_size (pi); | |
2241 | gdb_premptysysset (sysexit); | |
2242 | rsize = read (pi->status_fd, sysexit, size); | |
2243 | if (rsize < 0) | |
2244 | return NULL; | |
2245 | } | |
2246 | } | |
2247 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2248 | #else |
2249 | { | |
2250 | static sysset_t sysexit; | |
c5aa993b | 2251 | |
c3f6f71d JM |
2252 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2253 | ret = &sysexit; | |
2254 | } | |
2255 | #endif | |
2256 | if (save && ret) | |
37de36c6 | 2257 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2258 | |
2259 | return ret; | |
2260 | } | |
c906108c | 2261 | |
77382aee PA |
2262 | /* The current fault (if any) is cleared; the associated signal will |
2263 | not be sent to the process or LWP when it resumes. Returns | |
2264 | non-zero for success, zero for failure. */ | |
c906108c | 2265 | |
c3f6f71d | 2266 | int |
fba45db2 | 2267 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2268 | { |
2269 | int win; | |
2270 | ||
77382aee PA |
2271 | /* We should never have to apply this operation to any procinfo |
2272 | except the one for the main process. If that ever changes for | |
2273 | any reason, then take out the following clause and replace it | |
2274 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2275 | |
c3f6f71d JM |
2276 | if (pi->tid != 0) |
2277 | pi = find_procinfo_or_die (pi->pid, 0); | |
2278 | ||
2279 | #ifdef NEW_PROC_API | |
2280 | { | |
37de36c6 | 2281 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2282 | |
c3f6f71d JM |
2283 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2284 | } | |
2285 | #else | |
2286 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2287 | #endif | |
2288 | ||
2289 | return win; | |
c906108c SS |
2290 | } |
2291 | ||
77382aee PA |
2292 | /* Set the "current signal" that will be delivered next to the |
2293 | process. NOTE: semantics are different from those of KILL. This | |
2294 | signal will be delivered to the process or LWP immediately when it | |
2295 | is resumed (even if the signal is held/blocked); it will NOT | |
2296 | immediately cause another event of interest, and will NOT first | |
2297 | trap back to the debugger. Returns non-zero for success, zero for | |
2298 | failure. */ | |
c3f6f71d JM |
2299 | |
2300 | int | |
fba45db2 | 2301 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2302 | { |
2303 | int win; | |
2304 | struct { | |
37de36c6 | 2305 | procfs_ctl_t cmd; |
c3f6f71d | 2306 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2307 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2308 | } arg; |
73930d4d | 2309 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2310 | ptid_t wait_ptid; |
2311 | struct target_waitstatus wait_status; | |
c3f6f71d | 2312 | |
77382aee PA |
2313 | /* We should never have to apply this operation to any procinfo |
2314 | except the one for the main process. If that ever changes for | |
2315 | any reason, then take out the following clause and replace it | |
2316 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2317 | |
c3f6f71d JM |
2318 | if (pi->tid != 0) |
2319 | pi = find_procinfo_or_die (pi->pid, 0); | |
2320 | ||
2321 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2322 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2323 | receives a PIOCSSIG with a signal identical to the current |
2324 | signal, it messes up the current signal. Work around the kernel | |
2325 | bug. */ | |
c3f6f71d JM |
2326 | if (signo > 0 && |
2327 | signo == proc_cursig (pi)) | |
2328 | return 1; /* I assume this is a success? */ | |
2329 | #endif | |
2330 | ||
2331 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2332 | get_last_target_status (&wait_ptid, &wait_status); |
2333 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2334 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2335 | && wait_status.value.sig == target_signal_from_host (signo) | |
2336 | && proc_get_status (pi) | |
2337 | #ifdef NEW_PROC_API | |
2338 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2339 | #else | |
2340 | && pi->prstatus.pr_info.si_signo == signo | |
2341 | #endif | |
2342 | ) | |
2343 | /* Use the siginfo associated with the signal being | |
2344 | redelivered. */ | |
2345 | #ifdef NEW_PROC_API | |
73930d4d | 2346 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2347 | #else |
73930d4d | 2348 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2349 | #endif |
2350 | else | |
2351 | { | |
73930d4d KH |
2352 | mysinfo.si_signo = signo; |
2353 | mysinfo.si_code = 0; | |
2354 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2355 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2356 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2357 | } |
c3f6f71d JM |
2358 | |
2359 | #ifdef NEW_PROC_API | |
2360 | arg.cmd = PCSSIG; | |
2361 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2362 | #else | |
2363 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2364 | #endif | |
c906108c | 2365 | |
c3f6f71d JM |
2366 | return win; |
2367 | } | |
c906108c | 2368 | |
77382aee PA |
2369 | /* The current signal (if any) is cleared, and is not sent to the |
2370 | process or LWP when it resumes. Returns non-zero for success, zero | |
2371 | for failure. */ | |
c906108c | 2372 | |
c3f6f71d | 2373 | int |
fba45db2 | 2374 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2375 | { |
2376 | int win; | |
2377 | ||
77382aee PA |
2378 | /* We should never have to apply this operation to any procinfo |
2379 | except the one for the main process. If that ever changes for | |
2380 | any reason, then take out the following clause and replace it | |
2381 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2382 | |
c3f6f71d JM |
2383 | if (pi->tid != 0) |
2384 | pi = find_procinfo_or_die (pi->pid, 0); | |
2385 | ||
2386 | #ifdef NEW_PROC_API | |
2387 | { | |
2388 | struct { | |
37de36c6 | 2389 | procfs_ctl_t cmd; |
c3f6f71d | 2390 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2391 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2392 | } arg; |
73930d4d | 2393 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2394 | |
2395 | arg.cmd = PCSSIG; | |
2396 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2397 | mysinfo.si_signo = 0; |
2398 | mysinfo.si_code = 0; | |
2399 | mysinfo.si_errno = 0; | |
2400 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2401 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2402 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2403 | |
2404 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2405 | } | |
2406 | #else | |
2407 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2408 | #endif | |
c906108c | 2409 | |
c3f6f71d JM |
2410 | return win; |
2411 | } | |
c906108c | 2412 | |
772cf8be MK |
2413 | /* Return the general-purpose registers for the process or LWP |
2414 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2415 | |
c3f6f71d | 2416 | gdb_gregset_t * |
fba45db2 | 2417 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2418 | { |
2419 | if (!pi->status_valid || !pi->gregs_valid) | |
2420 | if (!proc_get_status (pi)) | |
2421 | return NULL; | |
2422 | ||
772cf8be MK |
2423 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2424 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2425 | |
2426 | #ifdef NEW_PROC_API | |
772cf8be | 2427 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2428 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2429 | # else |
c3f6f71d | 2430 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2431 | # endif |
2432 | #else | |
c3f6f71d | 2433 | return &pi->prstatus.pr_reg; |
772cf8be | 2434 | #endif |
c3f6f71d | 2435 | } |
c5aa993b | 2436 | |
772cf8be MK |
2437 | /* Return the general-purpose registers for the process or LWP |
2438 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2439 | |
c3f6f71d | 2440 | gdb_fpregset_t * |
fba45db2 | 2441 | proc_get_fpregs (procinfo *pi) |
c906108c | 2442 | { |
c3f6f71d JM |
2443 | #ifdef NEW_PROC_API |
2444 | if (!pi->status_valid || !pi->fpregs_valid) | |
2445 | if (!proc_get_status (pi)) | |
2446 | return NULL; | |
2447 | ||
772cf8be | 2448 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2449 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2450 | # else |
c3f6f71d | 2451 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2452 | # endif |
c5aa993b | 2453 | |
772cf8be | 2454 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2455 | if (pi->fpregs_valid) |
772cf8be | 2456 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2457 | else |
c906108c | 2458 | { |
772cf8be | 2459 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2460 | { |
c3f6f71d | 2461 | return NULL; |
c906108c | 2462 | } |
c3f6f71d | 2463 | else |
c906108c | 2464 | { |
772cf8be | 2465 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2466 | struct { |
2467 | long pr_count; | |
2468 | tid_t pr_error_thread; | |
2469 | tfpregset_t thread_1; | |
2470 | } thread_fpregs; | |
2471 | ||
2472 | thread_fpregs.pr_count = 1; | |
2473 | thread_fpregs.thread_1.tid = pi->tid; | |
2474 | ||
772cf8be MK |
2475 | if (pi->tid == 0 |
2476 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2477 | { |
2478 | pi->fpregs_valid = 1; | |
772cf8be | 2479 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2480 | } |
772cf8be MK |
2481 | else if (pi->tid != 0 |
2482 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2483 | { |
2484 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2485 | sizeof (pi->fpregset)); | |
2486 | pi->fpregs_valid = 1; | |
772cf8be | 2487 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2488 | } |
2489 | else | |
2490 | { | |
2491 | return NULL; | |
2492 | } | |
772cf8be | 2493 | # else |
c3f6f71d JM |
2494 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2495 | { | |
2496 | pi->fpregs_valid = 1; | |
772cf8be | 2497 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2498 | } |
2499 | else | |
2500 | { | |
2501 | return NULL; | |
2502 | } | |
772cf8be | 2503 | # endif |
c906108c | 2504 | } |
c906108c | 2505 | } |
772cf8be | 2506 | #endif /* NEW_PROC_API */ |
c906108c SS |
2507 | } |
2508 | ||
772cf8be MK |
2509 | /* Write the general-purpose registers back to the process or LWP |
2510 | corresponding to PI. Return non-zero for success, zero for | |
2511 | failure. */ | |
c3f6f71d JM |
2512 | |
2513 | int | |
fba45db2 | 2514 | proc_set_gregs (procinfo *pi) |
c906108c | 2515 | { |
c3f6f71d JM |
2516 | gdb_gregset_t *gregs; |
2517 | int win; | |
c5aa993b | 2518 | |
772cf8be MK |
2519 | gregs = proc_get_gregs (pi); |
2520 | if (gregs == NULL) | |
2521 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2522 | |
772cf8be | 2523 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2524 | { |
c3f6f71d | 2525 | return 0; |
c906108c | 2526 | } |
c3f6f71d | 2527 | else |
c906108c | 2528 | { |
c3f6f71d JM |
2529 | #ifdef NEW_PROC_API |
2530 | struct { | |
37de36c6 | 2531 | procfs_ctl_t cmd; |
c3f6f71d JM |
2532 | /* Use char array to avoid alignment issues. */ |
2533 | char gregs[sizeof (gdb_gregset_t)]; | |
2534 | } arg; | |
2535 | ||
772cf8be | 2536 | arg.cmd = PCSREG; |
c3f6f71d JM |
2537 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2538 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2539 | #else | |
2540 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2541 | #endif | |
c906108c | 2542 | } |
c3f6f71d | 2543 | |
772cf8be | 2544 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2545 | pi->gregs_valid = 0; |
2546 | return win; | |
c906108c SS |
2547 | } |
2548 | ||
772cf8be MK |
2549 | /* Write the floating-pointer registers back to the process or LWP |
2550 | corresponding to PI. Return non-zero for success, zero for | |
2551 | failure. */ | |
c3f6f71d JM |
2552 | |
2553 | int | |
fba45db2 | 2554 | proc_set_fpregs (procinfo *pi) |
c906108c | 2555 | { |
c3f6f71d JM |
2556 | gdb_fpregset_t *fpregs; |
2557 | int win; | |
2558 | ||
772cf8be MK |
2559 | fpregs = proc_get_fpregs (pi); |
2560 | if (fpregs == NULL) | |
2561 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2562 | |
772cf8be | 2563 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2564 | { |
c3f6f71d | 2565 | return 0; |
c906108c | 2566 | } |
c3f6f71d | 2567 | else |
c906108c | 2568 | { |
c3f6f71d JM |
2569 | #ifdef NEW_PROC_API |
2570 | struct { | |
37de36c6 | 2571 | procfs_ctl_t cmd; |
c3f6f71d JM |
2572 | /* Use char array to avoid alignment issues. */ |
2573 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2574 | } arg; | |
2575 | ||
772cf8be | 2576 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2577 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2578 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2579 | #else | |
772cf8be | 2580 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2581 | if (pi->tid == 0) |
2582 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2583 | else | |
2584 | { | |
2585 | struct { | |
2586 | long pr_count; | |
2587 | tid_t pr_error_thread; | |
2588 | tfpregset_t thread_1; | |
2589 | } thread_fpregs; | |
2590 | ||
2591 | thread_fpregs.pr_count = 1; | |
2592 | thread_fpregs.thread_1.tid = pi->tid; | |
2593 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2594 | sizeof (*fpregs)); | |
2595 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2596 | } | |
772cf8be | 2597 | # else |
c3f6f71d | 2598 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2599 | # endif |
2600 | #endif /* NEW_PROC_API */ | |
c906108c | 2601 | } |
c3f6f71d | 2602 | |
772cf8be | 2603 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2604 | pi->fpregs_valid = 0; |
2605 | return win; | |
c906108c SS |
2606 | } |
2607 | ||
77382aee PA |
2608 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2609 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2610 | |
c3f6f71d | 2611 | int |
fba45db2 | 2612 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2613 | { |
2614 | int win; | |
c906108c | 2615 | |
77382aee PA |
2616 | /* We might conceivably apply this operation to an LWP, and the |
2617 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2618 | |
c3f6f71d JM |
2619 | if (pi->ctl_fd == 0 && |
2620 | open_procinfo_files (pi, FD_CTL) == 0) | |
2621 | { | |
2622 | return 0; | |
2623 | } | |
2624 | else | |
2625 | { | |
2626 | #ifdef NEW_PROC_API | |
37de36c6 | 2627 | procfs_ctl_t cmd[2]; |
c906108c | 2628 | |
c3f6f71d JM |
2629 | cmd[0] = PCKILL; |
2630 | cmd[1] = signo; | |
2631 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2632 | #else /* ioctl method */ | |
2633 | /* FIXME: do I need the Alpha OSF fixups present in | |
2634 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2635 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2636 | #endif | |
2637 | } | |
c906108c | 2638 | |
c3f6f71d JM |
2639 | return win; |
2640 | } | |
c906108c | 2641 | |
77382aee PA |
2642 | /* Find the pid of the process that started this one. Returns the |
2643 | parent process pid, or zero. */ | |
c906108c | 2644 | |
c3f6f71d | 2645 | int |
fba45db2 | 2646 | proc_parent_pid (procinfo *pi) |
c906108c | 2647 | { |
77382aee PA |
2648 | /* We should never have to apply this operation to any procinfo |
2649 | except the one for the main process. If that ever changes for | |
2650 | any reason, then take out the following clause and replace it | |
2651 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2652 | |
c3f6f71d JM |
2653 | if (pi->tid != 0) |
2654 | pi = find_procinfo_or_die (pi->pid, 0); | |
2655 | ||
2656 | if (!pi->status_valid) | |
2657 | if (!proc_get_status (pi)) | |
2658 | return 0; | |
c5aa993b | 2659 | |
c3f6f71d JM |
2660 | return pi->prstatus.pr_ppid; |
2661 | } | |
2662 | ||
9a043c1d AC |
2663 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2664 | (a.k.a void pointer)! */ | |
2665 | ||
1ca8fce0 JB |
2666 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2667 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2668 | static void * |
2669 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2670 | { | |
4e906f53 | 2671 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2672 | void *ptr; |
2673 | ||
4e906f53 | 2674 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2675 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2676 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2677 | return ptr; |
2678 | } | |
1ca8fce0 | 2679 | #endif |
9a043c1d | 2680 | |
c3f6f71d | 2681 | int |
fba45db2 | 2682 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2683 | { |
d1a7880c PA |
2684 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2685 | /* If neither or these is defined, we can't support watchpoints. | |
2686 | This just avoids possibly failing to compile the below on such | |
2687 | systems. */ | |
c3f6f71d JM |
2688 | return 0; |
2689 | #else | |
2690 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2691 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2692 | return 0; | |
2693 | #else | |
2694 | struct { | |
37de36c6 | 2695 | procfs_ctl_t cmd; |
c3f6f71d JM |
2696 | char watch[sizeof (prwatch_t)]; |
2697 | } arg; | |
73930d4d | 2698 | prwatch_t pwatch; |
c3f6f71d | 2699 | |
9a043c1d AC |
2700 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2701 | convert a target address into something that can be stored in a | |
2702 | native data structure. */ | |
831e682e | 2703 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2704 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2705 | #else |
73930d4d | 2706 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2707 | #endif |
73930d4d KH |
2708 | pwatch.pr_size = len; |
2709 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2710 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2711 | arg.cmd = PCWATCH; | |
73930d4d | 2712 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2713 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2714 | #else | |
2715 | #if defined (PIOCSWATCH) | |
73930d4d | 2716 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2717 | #else |
2718 | return 0; /* Fail */ | |
2719 | #endif | |
2720 | #endif | |
2721 | #endif | |
2722 | #endif | |
c906108c SS |
2723 | } |
2724 | ||
965b60ee | 2725 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2726 | |
c3f6f71d | 2727 | #include <sys/sysi86.h> |
c906108c | 2728 | |
77382aee PA |
2729 | /* The KEY is actually the value of the lower 16 bits of the GS |
2730 | register for the LWP that we're interested in. Returns the | |
2731 | matching ssh struct (LDT entry). */ | |
c906108c | 2732 | |
c3f6f71d | 2733 | struct ssd * |
fba45db2 | 2734 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2735 | { |
c3f6f71d JM |
2736 | static struct ssd *ldt_entry = NULL; |
2737 | #ifdef NEW_PROC_API | |
2738 | char pathname[MAX_PROC_NAME_SIZE]; | |
2739 | struct cleanup *old_chain = NULL; | |
2740 | int fd; | |
2741 | ||
2742 | /* Allocate space for one LDT entry. | |
2743 | This alloc must persist, because we return a pointer to it. */ | |
2744 | if (ldt_entry == NULL) | |
2745 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2746 | ||
2747 | /* Open the file descriptor for the LDT table. */ | |
2748 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2749 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2750 | { |
c3f6f71d JM |
2751 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2752 | return NULL; | |
c906108c | 2753 | } |
c3f6f71d | 2754 | /* Make sure it gets closed again! */ |
004527cb | 2755 | old_chain = make_cleanup_close (fd); |
c906108c | 2756 | |
c3f6f71d JM |
2757 | /* Now 'read' thru the table, find a match and return it. */ |
2758 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2759 | { |
c3f6f71d JM |
2760 | if (ldt_entry->sel == 0 && |
2761 | ldt_entry->bo == 0 && | |
2762 | ldt_entry->acc1 == 0 && | |
2763 | ldt_entry->acc2 == 0) | |
2764 | break; /* end of table */ | |
2765 | /* If key matches, return this entry. */ | |
2766 | if (ldt_entry->sel == key) | |
2767 | return ldt_entry; | |
c906108c | 2768 | } |
c3f6f71d JM |
2769 | /* Loop ended, match not found. */ |
2770 | return NULL; | |
2771 | #else | |
2772 | int nldt, i; | |
2773 | static int nalloc = 0; | |
c906108c | 2774 | |
c3f6f71d JM |
2775 | /* Get the number of LDT entries. */ |
2776 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2777 | { |
c3f6f71d JM |
2778 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2779 | return NULL; | |
c906108c SS |
2780 | } |
2781 | ||
c3f6f71d JM |
2782 | /* Allocate space for the number of LDT entries. */ |
2783 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2784 | if (nldt > nalloc) | |
c906108c | 2785 | { |
19958708 | 2786 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2787 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2788 | nalloc = nldt; | |
2789 | } | |
19958708 | 2790 | |
c3f6f71d JM |
2791 | /* Read the whole table in one gulp. */ |
2792 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2793 | { | |
2794 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2795 | return NULL; | |
c906108c SS |
2796 | } |
2797 | ||
c3f6f71d JM |
2798 | /* Search the table and return the (first) entry matching 'key'. */ |
2799 | for (i = 0; i < nldt; i++) | |
2800 | if (ldt_entry[i].sel == key) | |
2801 | return &ldt_entry[i]; | |
c906108c | 2802 | |
c3f6f71d JM |
2803 | /* Loop ended, match not found. */ |
2804 | return NULL; | |
2805 | #endif | |
2806 | } | |
c906108c | 2807 | |
77382aee | 2808 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2809 | |
2810 | struct ssd * | |
2811 | procfs_find_LDT_entry (ptid_t ptid) | |
2812 | { | |
2813 | gdb_gregset_t *gregs; | |
2814 | int key; | |
2815 | procinfo *pi; | |
2816 | ||
2817 | /* Find procinfo for the lwp. */ | |
2818 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
2819 | { | |
0b62613e | 2820 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2821 | PIDGET (ptid), TIDGET (ptid)); |
2822 | return NULL; | |
2823 | } | |
2824 | /* get its general registers. */ | |
2825 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
2826 | { | |
0b62613e | 2827 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2828 | PIDGET (ptid), TIDGET (ptid)); |
2829 | return NULL; | |
2830 | } | |
2831 | /* Now extract the GS register's lower 16 bits. */ | |
2832 | key = (*gregs)[GS] & 0xffff; | |
2833 | ||
2834 | /* Find the matching entry and return it. */ | |
2835 | return proc_get_LDT_entry (pi, key); | |
2836 | } | |
2837 | ||
2838 | #endif | |
c906108c | 2839 | |
c3f6f71d | 2840 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2841 | |
c3f6f71d | 2842 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2843 | |
c3f6f71d JM |
2844 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2845 | since there is a different way to do threads on every OS. */ | |
c906108c | 2846 | |
77382aee | 2847 | /* Returns the number of threads for the process. */ |
c906108c | 2848 | |
c3f6f71d | 2849 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2850 | /* OSF version */ |
19958708 | 2851 | int |
fba45db2 | 2852 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2853 | { |
2854 | int nthreads = 0; | |
c906108c | 2855 | |
c3f6f71d JM |
2856 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2857 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2858 | |
c3f6f71d | 2859 | return nthreads; |
c906108c SS |
2860 | } |
2861 | ||
c3f6f71d JM |
2862 | #else |
2863 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2864 | /* Solaris and Unixware version */ |
c3f6f71d | 2865 | int |
fba45db2 | 2866 | proc_get_nthreads (procinfo *pi) |
c906108c | 2867 | { |
c3f6f71d JM |
2868 | if (!pi->status_valid) |
2869 | if (!proc_get_status (pi)) | |
2870 | return 0; | |
c5aa993b | 2871 | |
77382aee PA |
2872 | /* NEW_PROC_API: only works for the process procinfo, because the |
2873 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2874 | #ifdef NEW_PROC_API |
c3f6f71d JM |
2875 | if (pi->tid != 0) /* find the parent process procinfo */ |
2876 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2877 | #endif |
c3f6f71d | 2878 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2879 | } |
2880 | ||
c3f6f71d | 2881 | #else |
77382aee | 2882 | /* Default version */ |
c3f6f71d | 2883 | int |
fba45db2 | 2884 | proc_get_nthreads (procinfo *pi) |
c906108c | 2885 | { |
c3f6f71d JM |
2886 | return 0; |
2887 | } | |
2888 | #endif | |
2889 | #endif | |
2890 | ||
77382aee PA |
2891 | /* LWP version. |
2892 | ||
2893 | Return the ID of the thread that had an event of interest. | |
2894 | (ie. the one that hit a breakpoint or other traced event). All | |
2895 | other things being equal, this should be the ID of a thread that is | |
2896 | currently executing. */ | |
c3f6f71d JM |
2897 | |
2898 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2899 | /* Solaris and Unixware version */ |
c3f6f71d | 2900 | int |
fba45db2 | 2901 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2902 | { |
77382aee PA |
2903 | /* Note: this should be applied to the root procinfo for the |
2904 | process, not to the procinfo for an LWP. If applied to the | |
2905 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2906 | that case, find the parent process procinfo. */ | |
19958708 | 2907 | |
c3f6f71d JM |
2908 | if (pi->tid != 0) |
2909 | pi = find_procinfo_or_die (pi->pid, 0); | |
2910 | ||
2911 | if (!pi->status_valid) | |
2912 | if (!proc_get_status (pi)) | |
2913 | return 0; | |
2914 | ||
2915 | #ifdef NEW_PROC_API | |
2916 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2917 | #else |
c3f6f71d | 2918 | return pi->prstatus.pr_who; |
c906108c | 2919 | #endif |
c3f6f71d | 2920 | } |
c906108c | 2921 | |
c3f6f71d JM |
2922 | #else |
2923 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2924 | /* OSF version */ |
19958708 | 2925 | int |
fba45db2 | 2926 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
2927 | { |
2928 | #if 0 /* FIXME: not ready for prime time? */ | |
2929 | return pi->prstatus.pr_tid; | |
2930 | #else | |
2931 | return 0; | |
2932 | #endif | |
c906108c SS |
2933 | } |
2934 | ||
c3f6f71d | 2935 | #else |
77382aee | 2936 | /* Default version */ |
19958708 | 2937 | int |
fba45db2 | 2938 | proc_get_current_thread (procinfo *pi) |
c906108c | 2939 | { |
c3f6f71d JM |
2940 | return 0; |
2941 | } | |
2942 | ||
2943 | #endif | |
2944 | #endif | |
c906108c | 2945 | |
77382aee PA |
2946 | /* Discover the IDs of all the threads within the process, and create |
2947 | a procinfo for each of them (chained to the parent). This | |
2948 | unfortunately requires a different method on every OS. Returns | |
2949 | non-zero for success, zero for failure. */ | |
c906108c | 2950 | |
c3f6f71d | 2951 | int |
fba45db2 | 2952 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2953 | { |
2954 | if (thread && parent) /* sanity */ | |
c906108c | 2955 | { |
c3f6f71d JM |
2956 | thread->status_valid = 0; |
2957 | if (!proc_get_status (thread)) | |
2958 | destroy_one_procinfo (&parent->thread_list, thread); | |
2959 | } | |
2960 | return 0; /* keep iterating */ | |
2961 | } | |
c5aa993b | 2962 | |
c3f6f71d | 2963 | #if defined (PIOCLSTATUS) |
77382aee | 2964 | /* Solaris 2.5 (ioctl) version */ |
c3f6f71d | 2965 | int |
fba45db2 | 2966 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2967 | { |
2968 | gdb_prstatus_t *prstatus; | |
2969 | struct cleanup *old_chain = NULL; | |
2970 | procinfo *thread; | |
2971 | int nlwp, i; | |
2972 | ||
77382aee PA |
2973 | /* We should never have to apply this operation to any procinfo |
2974 | except the one for the main process. If that ever changes for | |
2975 | any reason, then take out the following clause and replace it | |
2976 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2977 | |
c3f6f71d JM |
2978 | if (pi->tid != 0) |
2979 | pi = find_procinfo_or_die (pi->pid, 0); | |
2980 | ||
2981 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2982 | ||
2983 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2984 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2985 | ||
3c37485b | 2986 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2987 | |
b8c9b27d | 2988 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2989 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2990 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2991 | ||
77382aee | 2992 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2993 | for (i = 1; i < nlwp + 1; i++) |
2994 | { | |
2995 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2996 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2997 | |
c3f6f71d JM |
2998 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2999 | thread->status_valid = 1; | |
3000 | } | |
3001 | pi->threads_valid = 1; | |
3002 | do_cleanups (old_chain); | |
3003 | return 1; | |
3004 | } | |
3005 | #else | |
3006 | #ifdef NEW_PROC_API | |
77382aee | 3007 | /* Unixware and Solaris 6 (and later) version */ |
004527cb AC |
3008 | static void |
3009 | do_closedir_cleanup (void *dir) | |
3010 | { | |
3011 | closedir (dir); | |
3012 | } | |
3013 | ||
c3f6f71d | 3014 | int |
fba45db2 | 3015 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3016 | { |
3017 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3018 | struct dirent *direntry; | |
3019 | struct cleanup *old_chain = NULL; | |
3020 | procinfo *thread; | |
3021 | DIR *dirp; | |
3022 | int lwpid; | |
3023 | ||
77382aee PA |
3024 | /* We should never have to apply this operation to any procinfo |
3025 | except the one for the main process. If that ever changes for | |
3026 | any reason, then take out the following clause and replace it | |
3027 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3028 | |
c3f6f71d JM |
3029 | if (pi->tid != 0) |
3030 | pi = find_procinfo_or_die (pi->pid, 0); | |
3031 | ||
3032 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3033 | ||
77382aee PA |
3034 | /* Unixware |
3035 | ||
3036 | Note: this brute-force method is the only way I know of to | |
3037 | accomplish this task on Unixware. This method will also work on | |
3038 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
3039 | way to do this on Solaris, but the margins of this manuscript are | |
3040 | too small to write it here... ;-) */ | |
c3f6f71d JM |
3041 | |
3042 | strcpy (pathname, pi->pathname); | |
3043 | strcat (pathname, "/lwp"); | |
3044 | if ((dirp = opendir (pathname)) == NULL) | |
3045 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3046 | ||
004527cb | 3047 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3048 | while ((direntry = readdir (dirp)) != NULL) |
3049 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3050 | { | |
3051 | lwpid = atoi (&direntry->d_name[0]); | |
3052 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3053 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3054 | } | |
3055 | pi->threads_valid = 1; | |
3056 | do_cleanups (old_chain); | |
3057 | return 1; | |
3058 | } | |
3059 | #else | |
3060 | #ifdef PIOCTLIST | |
77382aee | 3061 | /* OSF version */ |
19958708 | 3062 | int |
fba45db2 | 3063 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3064 | { |
3065 | int nthreads, i; | |
3066 | tid_t *threads; | |
3067 | ||
77382aee PA |
3068 | /* We should never have to apply this operation to any procinfo |
3069 | except the one for the main process. If that ever changes for | |
3070 | any reason, then take out the following clause and replace it | |
3071 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3072 | |
c3f6f71d JM |
3073 | if (pi->tid != 0) |
3074 | pi = find_procinfo_or_die (pi->pid, 0); | |
3075 | ||
3076 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3077 | ||
3078 | nthreads = proc_get_nthreads (pi); | |
3079 | if (nthreads < 2) | |
3080 | return 0; /* nothing to do for 1 or fewer threads */ | |
3081 | ||
3c37485b | 3082 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3083 | |
c3f6f71d JM |
3084 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3085 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3086 | ||
3087 | for (i = 0; i < nthreads; i++) | |
3088 | { | |
3089 | if (!find_procinfo (pi->pid, threads[i])) | |
3090 | if (!create_procinfo (pi->pid, threads[i])) | |
3091 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3092 | } |
c3f6f71d JM |
3093 | pi->threads_valid = 1; |
3094 | return 1; | |
c906108c | 3095 | } |
c3f6f71d | 3096 | #else |
77382aee | 3097 | /* Default version */ |
c3f6f71d | 3098 | int |
fba45db2 | 3099 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3100 | { |
3101 | return 0; | |
3102 | } | |
3103 | #endif /* OSF PIOCTLIST */ | |
3104 | #endif /* NEW_PROC_API */ | |
3105 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3106 | |
77382aee PA |
3107 | /* Given a pointer to a function, call that function once for each lwp |
3108 | in the procinfo list, until the function returns non-zero, in which | |
3109 | event return the value returned by the function. | |
3110 | ||
3111 | Note: this function does NOT call update_threads. If you want to | |
3112 | discover new threads first, you must call that function explicitly. | |
3113 | This function just makes a quick pass over the currently-known | |
3114 | procinfos. | |
3115 | ||
3116 | PI is the parent process procinfo. FUNC is the per-thread | |
3117 | function. PTR is an opaque parameter for function. Returns the | |
3118 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d JM |
3119 | |
3120 | int | |
d0849a9a KB |
3121 | proc_iterate_over_threads (procinfo *pi, |
3122 | int (*func) (procinfo *, procinfo *, void *), | |
3123 | void *ptr) | |
c906108c | 3124 | { |
c3f6f71d JM |
3125 | procinfo *thread, *next; |
3126 | int retval = 0; | |
c906108c | 3127 | |
77382aee PA |
3128 | /* We should never have to apply this operation to any procinfo |
3129 | except the one for the main process. If that ever changes for | |
3130 | any reason, then take out the following clause and replace it | |
3131 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3132 | |
c3f6f71d JM |
3133 | if (pi->tid != 0) |
3134 | pi = find_procinfo_or_die (pi->pid, 0); | |
3135 | ||
3136 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3137 | { |
c3f6f71d JM |
3138 | next = thread->next; /* in case thread is destroyed */ |
3139 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3140 | break; | |
c906108c | 3141 | } |
c3f6f71d JM |
3142 | |
3143 | return retval; | |
c906108c SS |
3144 | } |
3145 | ||
c3f6f71d JM |
3146 | /* =================== END, Thread "MODULE" =================== */ |
3147 | ||
3148 | /* =================== END, /proc "MODULE" =================== */ | |
3149 | ||
3150 | /* =================== GDB "MODULE" =================== */ | |
3151 | ||
77382aee PA |
3152 | /* Here are all of the gdb target vector functions and their |
3153 | friends. */ | |
c3f6f71d | 3154 | |
39f77062 | 3155 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3156 | static void do_detach (int signo); |
37de36c6 | 3157 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce | 3158 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 3159 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
3160 | |
3161 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3162 | the startup phase. The following two variables are used to record | |
3163 | the address of the breakpoint, and the code that was replaced by | |
3164 | a breakpoint. */ | |
3165 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3166 | static void *dbx_link_bpt; |
c3f6f71d | 3167 | |
77382aee PA |
3168 | /* Sets up the inferior to be debugged. Registers to trace signals, |
3169 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
3170 | may want to customize that. Returns zero for success (note! | |
3171 | unlike most functions in this module); on failure, returns the LINE | |
3172 | NUMBER where it failed! */ | |
c3f6f71d JM |
3173 | |
3174 | static int | |
fba45db2 | 3175 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3176 | { |
c3f6f71d | 3177 | fltset_t traced_faults; |
37de36c6 KB |
3178 | gdb_sigset_t traced_signals; |
3179 | sysset_t *traced_syscall_entries; | |
3180 | sysset_t *traced_syscall_exits; | |
3181 | int status; | |
c906108c | 3182 | |
c3f6f71d JM |
3183 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3184 | /* On some systems (OSF), we don't trace hardware faults. | |
3185 | Apparently it's enough that we catch them as signals. | |
3186 | Wonder why we don't just do that in general? */ | |
3187 | premptyset (&traced_faults); /* don't trace faults. */ | |
3188 | #else | |
3189 | /* Register to trace hardware faults in the child. */ | |
3190 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3191 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3192 | #endif |
3193 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3194 | return __LINE__; | |
c906108c | 3195 | |
c3f6f71d JM |
3196 | /* Register to trace selected signals in the child. */ |
3197 | premptyset (&traced_signals); | |
3198 | if (!register_gdb_signals (pi, &traced_signals)) | |
3199 | return __LINE__; | |
3200 | ||
37de36c6 | 3201 | |
c3f6f71d | 3202 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3203 | traced_syscall_entries = sysset_t_alloc (pi); |
3204 | gdb_premptysysset (traced_syscall_entries); | |
3205 | #ifdef SYS_exit | |
3206 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3207 | #endif | |
c3f6f71d | 3208 | #ifdef SYS_lwpexit |
37de36c6 | 3209 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3210 | #endif |
3211 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3212 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3213 | #endif | |
3214 | #ifdef DYNAMIC_SYSCALLS | |
3215 | { | |
3216 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 3217 | |
37de36c6 KB |
3218 | if (callnum >= 0) |
3219 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3220 | } | |
c906108c SS |
3221 | #endif |
3222 | ||
37de36c6 KB |
3223 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3224 | xfree (traced_syscall_entries); | |
3225 | if (!status) | |
c3f6f71d JM |
3226 | return __LINE__; |
3227 | ||
3228 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3229 | /* OSF method for tracing exec syscalls. Quoting: | |
3230 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3231 | exits from exec system calls because of the user level loader. */ | |
3232 | /* FIXME: make nice and maybe move into an access function. */ | |
3233 | { | |
3234 | int prfs_flags; | |
3235 | ||
3236 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3237 | return __LINE__; | |
3238 | ||
3239 | prfs_flags |= PRFS_STOPEXEC; | |
3240 | ||
3241 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3242 | return __LINE__; | |
3243 | } | |
3244 | #else /* not PRFS_STOPEXEC */ | |
3245 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3246 | /* GW: Rationale... | |
3247 | Not all systems with /proc have all the exec* syscalls with the same | |
3248 | names. On the SGI, for example, there is no SYS_exec, but there | |
3249 | *is* a SYS_execv. So, we try to account for that. */ | |
3250 | ||
37de36c6 KB |
3251 | traced_syscall_exits = sysset_t_alloc (pi); |
3252 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3253 | #ifdef SYS_exec |
37de36c6 | 3254 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3255 | #endif |
3256 | #ifdef SYS_execve | |
37de36c6 | 3257 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3258 | #endif |
3259 | #ifdef SYS_execv | |
37de36c6 | 3260 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3261 | #endif |
c5aa993b | 3262 | |
c3f6f71d | 3263 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3264 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3265 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3266 | #endif |
c5aa993b | 3267 | |
c3f6f71d | 3268 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3269 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3270 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3271 | #endif |
c5aa993b | 3272 | |
37de36c6 KB |
3273 | #ifdef DYNAMIC_SYSCALLS |
3274 | { | |
3275 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3276 | |
37de36c6 KB |
3277 | if (callnum >= 0) |
3278 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3279 | callnum = find_syscall (pi, "ra_execve"); | |
3280 | if (callnum >= 0) | |
3281 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3282 | } | |
3283 | #endif | |
c906108c | 3284 | |
37de36c6 KB |
3285 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3286 | xfree (traced_syscall_exits); | |
3287 | if (!status) | |
c3f6f71d JM |
3288 | return __LINE__; |
3289 | ||
3290 | #endif /* PRFS_STOPEXEC */ | |
3291 | return 0; | |
c906108c SS |
3292 | } |
3293 | ||
19958708 | 3294 | static void |
136d6dae | 3295 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3296 | { |
c3f6f71d JM |
3297 | char *exec_file; |
3298 | int pid; | |
3299 | ||
74164c56 | 3300 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3301 | |
c3f6f71d | 3302 | if (pid == getpid ()) |
8a3fe4f8 | 3303 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3304 | |
c3f6f71d | 3305 | if (from_tty) |
c906108c | 3306 | { |
c3f6f71d JM |
3307 | exec_file = get_exec_file (0); |
3308 | ||
3309 | if (exec_file) | |
a3f17187 | 3310 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3311 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3312 | else |
a3f17187 | 3313 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3314 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3315 | |
3316 | fflush (stdout); | |
c906108c | 3317 | } |
39f77062 | 3318 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3319 | push_target (ops); |
c3f6f71d JM |
3320 | } |
3321 | ||
19958708 | 3322 | static void |
136d6dae | 3323 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3324 | { |
cc377e6b | 3325 | int sig = 0; |
7f9f62ba | 3326 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3327 | |
3328 | if (args) | |
3329 | sig = atoi (args); | |
c3f6f71d JM |
3330 | |
3331 | if (from_tty) | |
c906108c | 3332 | { |
cc377e6b MK |
3333 | char *exec_file; |
3334 | ||
c3f6f71d | 3335 | exec_file = get_exec_file (0); |
cc377e6b | 3336 | if (exec_file == NULL) |
c3f6f71d | 3337 | exec_file = ""; |
cc377e6b | 3338 | |
a3f17187 | 3339 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3340 | target_pid_to_str (pid_to_ptid (pid))); |
3341 | gdb_flush (gdb_stdout); | |
c906108c | 3342 | } |
19958708 | 3343 | |
cc377e6b MK |
3344 | do_detach (sig); |
3345 | ||
39f77062 | 3346 | inferior_ptid = null_ptid; |
7f9f62ba | 3347 | detach_inferior (pid); |
28439f5e | 3348 | unpush_target (ops); |
c906108c SS |
3349 | } |
3350 | ||
39f77062 KB |
3351 | static ptid_t |
3352 | do_attach (ptid_t ptid) | |
c906108c | 3353 | { |
c3f6f71d | 3354 | procinfo *pi; |
181e7f93 | 3355 | struct inferior *inf; |
c3f6f71d | 3356 | int fail; |
2689673f | 3357 | int lwpid; |
c3f6f71d | 3358 | |
39f77062 | 3359 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3360 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3361 | |
3362 | if (!open_procinfo_files (pi, FD_CTL)) | |
3363 | { | |
3364 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3365 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3366 | PIDGET (ptid)); |
c3f6f71d JM |
3367 | dead_procinfo (pi, errmsg, NOKILL); |
3368 | } | |
c906108c | 3369 | |
c3f6f71d JM |
3370 | /* Stop the process (if it isn't already stopped). */ |
3371 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3372 | { |
c3f6f71d JM |
3373 | pi->was_stopped = 1; |
3374 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3375 | } |
3376 | else | |
3377 | { | |
c3f6f71d JM |
3378 | pi->was_stopped = 0; |
3379 | /* Set the process to run again when we close it. */ | |
3380 | if (!proc_set_run_on_last_close (pi)) | |
3381 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3382 | ||
3383 | /* Now stop the process. */ | |
3384 | if (!proc_stop_process (pi)) | |
3385 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3386 | pi->ignore_next_sigstop = 1; | |
c906108c | 3387 | } |
c3f6f71d JM |
3388 | /* Save some of the /proc state to be restored if we detach. */ |
3389 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3390 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3391 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3392 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3393 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3394 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3395 | NOKILL); | |
37de36c6 | 3396 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3397 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3398 | NOKILL); |
3399 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3400 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3401 | ||
3402 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3403 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3404 | ||
6c95b8df PA |
3405 | inf = current_inferior (); |
3406 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3407 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3408 | inf->attach_flag = 1; |
2689673f PA |
3409 | |
3410 | /* Create a procinfo for the current lwp. */ | |
3411 | lwpid = proc_get_current_thread (pi); | |
3412 | create_procinfo (pi->pid, lwpid); | |
3413 | ||
3414 | /* Add it to gdb's thread list. */ | |
3415 | ptid = MERGEPID (pi->pid, lwpid); | |
3416 | add_thread (ptid); | |
3417 | ||
3418 | return ptid; | |
c906108c SS |
3419 | } |
3420 | ||
3421 | static void | |
fba45db2 | 3422 | do_detach (int signo) |
c906108c | 3423 | { |
c3f6f71d | 3424 | procinfo *pi; |
c906108c | 3425 | |
c3f6f71d | 3426 | /* Find procinfo for the main process */ |
39f77062 | 3427 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3428 | if (signo) |
3429 | if (!proc_set_current_signal (pi, signo)) | |
3430 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3431 | |
c3f6f71d JM |
3432 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3433 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3434 | |
c3f6f71d JM |
3435 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3436 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3437 | ||
37de36c6 | 3438 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3439 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3440 | ||
37de36c6 | 3441 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3442 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3443 | ||
3444 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3445 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3446 | ||
3447 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3448 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3449 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3450 | { |
3451 | /* Clear any pending signal. */ | |
3452 | if (!proc_clear_current_fault (pi)) | |
3453 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3454 | ||
1a303dec MS |
3455 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3456 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3457 | ||
c3f6f71d JM |
3458 | if (!proc_set_run_on_last_close (pi)) |
3459 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3460 | } | |
3461 | ||
c3f6f71d | 3462 | destroy_procinfo (pi); |
c906108c SS |
3463 | } |
3464 | ||
772cf8be MK |
3465 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3466 | for all registers. | |
3467 | ||
3468 | ??? Is the following note still relevant? We can't get individual | |
3469 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3470 | don't bother with caching at all in that case. | |
3471 | ||
3472 | NOTE: Since the /proc interface cannot give us individual | |
3473 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3474 | This results in the possibility that we will do unnecessarily many | |
3475 | fetches, since we may be called repeatedly for individual | |
3476 | registers. So we cache the results, and mark the cache invalid | |
3477 | when the process is resumed. */ | |
c3f6f71d | 3478 | |
c906108c | 3479 | static void |
28439f5e PA |
3480 | procfs_fetch_registers (struct target_ops *ops, |
3481 | struct regcache *regcache, int regnum) | |
c906108c | 3482 | { |
772cf8be MK |
3483 | gdb_gregset_t *gregs; |
3484 | procinfo *pi; | |
3485 | int pid = PIDGET (inferior_ptid); | |
3486 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3487 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3488 | |
2689673f | 3489 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3490 | |
3491 | if (pi == NULL) | |
8a3fe4f8 | 3492 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3493 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3494 | |
772cf8be MK |
3495 | gregs = proc_get_gregs (pi); |
3496 | if (gregs == NULL) | |
c3f6f71d JM |
3497 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3498 | ||
56be3814 | 3499 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3500 | |
40a6adc1 | 3501 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3502 | { |
772cf8be MK |
3503 | gdb_fpregset_t *fpregs; |
3504 | ||
40a6adc1 MD |
3505 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3506 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3507 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3508 | return; /* Not a floating point register. */ |
c5aa993b | 3509 | |
772cf8be MK |
3510 | fpregs = proc_get_fpregs (pi); |
3511 | if (fpregs == NULL) | |
60054393 | 3512 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3513 | |
56be3814 | 3514 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3515 | } |
c906108c SS |
3516 | } |
3517 | ||
772cf8be MK |
3518 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3519 | this for all registers. | |
3520 | ||
3521 | NOTE: Since the /proc interface will not read individual registers, | |
3522 | we will cache these requests until the process is resumed, and only | |
3523 | then write them back to the inferior process. | |
77382aee | 3524 | |
772cf8be MK |
3525 | FIXME: is that a really bad idea? Have to think about cases where |
3526 | writing one register might affect the value of others, etc. */ | |
c906108c | 3527 | |
c3f6f71d | 3528 | static void |
28439f5e PA |
3529 | procfs_store_registers (struct target_ops *ops, |
3530 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3531 | { |
772cf8be MK |
3532 | gdb_gregset_t *gregs; |
3533 | procinfo *pi; | |
3534 | int pid = PIDGET (inferior_ptid); | |
3535 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3536 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3537 | |
2689673f | 3538 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3539 | |
3540 | if (pi == NULL) | |
8a3fe4f8 | 3541 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3542 | target_pid_to_str (inferior_ptid)); |
c906108c | 3543 | |
772cf8be MK |
3544 | gregs = proc_get_gregs (pi); |
3545 | if (gregs == NULL) | |
c3f6f71d | 3546 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3547 | |
56be3814 | 3548 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3549 | if (!proc_set_gregs (pi)) |
3550 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3551 | |
40a6adc1 | 3552 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3553 | { |
772cf8be MK |
3554 | gdb_fpregset_t *fpregs; |
3555 | ||
40a6adc1 MD |
3556 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3557 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3558 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3559 | return; /* Not a floating point register. */ |
60054393 | 3560 | |
772cf8be MK |
3561 | fpregs = proc_get_fpregs (pi); |
3562 | if (fpregs == NULL) | |
60054393 MS |
3563 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3564 | ||
56be3814 | 3565 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3566 | if (!proc_set_fpregs (pi)) |
3567 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3568 | } | |
c3f6f71d | 3569 | } |
c906108c | 3570 | |
37de36c6 KB |
3571 | static int |
3572 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3573 | { | |
37de36c6 KB |
3574 | #ifdef SYS_lwp_exit |
3575 | if (scall == SYS_lwp_exit) | |
3576 | return 1; | |
3577 | #endif | |
3578 | #ifdef SYS_lwpexit | |
3579 | if (scall == SYS_lwpexit) | |
3580 | return 1; | |
3581 | #endif | |
3582 | return 0; | |
3583 | } | |
3584 | ||
3585 | static int | |
3586 | syscall_is_exit (procinfo *pi, int scall) | |
3587 | { | |
3588 | #ifdef SYS_exit | |
3589 | if (scall == SYS_exit) | |
3590 | return 1; | |
3591 | #endif | |
3592 | #ifdef DYNAMIC_SYSCALLS | |
3593 | if (find_syscall (pi, "_exit") == scall) | |
3594 | return 1; | |
3595 | #endif | |
3596 | return 0; | |
3597 | } | |
3598 | ||
3599 | static int | |
3600 | syscall_is_exec (procinfo *pi, int scall) | |
3601 | { | |
3602 | #ifdef SYS_exec | |
3603 | if (scall == SYS_exec) | |
3604 | return 1; | |
3605 | #endif | |
3606 | #ifdef SYS_execv | |
3607 | if (scall == SYS_execv) | |
3608 | return 1; | |
3609 | #endif | |
3610 | #ifdef SYS_execve | |
3611 | if (scall == SYS_execve) | |
3612 | return 1; | |
3613 | #endif | |
3614 | #ifdef DYNAMIC_SYSCALLS | |
3615 | if (find_syscall (pi, "_execve")) | |
3616 | return 1; | |
3617 | if (find_syscall (pi, "ra_execve")) | |
3618 | return 1; | |
3619 | #endif | |
3620 | return 0; | |
3621 | } | |
3622 | ||
3623 | static int | |
3624 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3625 | { | |
3626 | #ifdef SYS_lwp_create | |
3627 | if (scall == SYS_lwp_create) | |
3628 | return 1; | |
3629 | #endif | |
3630 | #ifdef SYS_lwpcreate | |
3631 | if (scall == SYS_lwpcreate) | |
3632 | return 1; | |
3633 | #endif | |
3634 | return 0; | |
3635 | } | |
3636 | ||
7434dadd JB |
3637 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3638 | Does nothing if the breakpoint hasn't been inserted or has already | |
3639 | been removed. */ | |
3640 | ||
3641 | static void | |
3642 | remove_dbx_link_breakpoint (void) | |
3643 | { | |
3644 | if (dbx_link_bpt_addr == 0) | |
3645 | return; | |
3646 | ||
3647 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3648 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3649 | ||
3650 | dbx_link_bpt_addr = 0; | |
3651 | dbx_link_bpt = NULL; | |
3652 | } | |
3653 | ||
3654 | #ifdef SYS_syssgi | |
3655 | /* Return the address of the __dbx_link() function in the file | |
3656 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3657 | the symbol was not found. */ | |
3658 | ||
3659 | static CORE_ADDR | |
3660 | dbx_link_addr (bfd *abfd) | |
3661 | { | |
3662 | long storage_needed; | |
3663 | asymbol **symbol_table; | |
3664 | long number_of_symbols; | |
3665 | long i; | |
3666 | ||
3667 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3668 | if (storage_needed <= 0) | |
3669 | return 0; | |
3670 | ||
3671 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3672 | make_cleanup (xfree, symbol_table); | |
3673 | ||
3674 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3675 | ||
3676 | for (i = 0; i < number_of_symbols; i++) | |
3677 | { | |
3678 | asymbol *sym = symbol_table[i]; | |
3679 | ||
3680 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3681 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3682 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3683 | } |
3684 | ||
3685 | /* Symbol not found, return NULL. */ | |
3686 | return 0; | |
3687 | } | |
3688 | ||
3689 | /* Search the symbol table of the file referenced by FD for a symbol | |
3690 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
3691 | and return nonzero. Return zero otherwise. */ | |
3692 | ||
3693 | static int | |
3694 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3695 | { | |
3696 | bfd *abfd; | |
3697 | long storage_needed; | |
3698 | CORE_ADDR sym_addr; | |
3699 | ||
3700 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
3701 | if (abfd == NULL) | |
3702 | { | |
3703 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3704 | return 0; | |
3705 | } | |
3706 | ||
3707 | if (!bfd_check_format (abfd, bfd_object)) | |
3708 | { | |
3709 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3710 | symbol in it. */ |
7434dadd JB |
3711 | bfd_close (abfd); |
3712 | return 0; | |
3713 | } | |
3714 | ||
3715 | sym_addr = dbx_link_addr (abfd); | |
3716 | if (sym_addr != 0) | |
3717 | { | |
3718 | /* Insert the breakpoint. */ | |
3719 | dbx_link_bpt_addr = sym_addr; | |
3720 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3721 | sym_addr); | |
3722 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3723 | { |
3724 | warning (_("Failed to insert dbx_link breakpoint.")); | |
3725 | bfd_close (abfd); | |
3726 | return 0; | |
3727 | } | |
7434dadd JB |
3728 | bfd_close (abfd); |
3729 | return 1; | |
3730 | } | |
3731 | ||
3732 | bfd_close (abfd); | |
3733 | return 0; | |
3734 | } | |
3735 | ||
e294797a | 3736 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3737 | space in the process. The callback function receives an open file |
3738 | descriptor for the file corresponding to that mapped address space | |
3739 | (if there is one), and the base address of the mapped space. Quit | |
3740 | when the callback function returns a nonzero value, or at teh end | |
3741 | of the mappings. Returns the first non-zero return value of the | |
3742 | callback function, or zero. */ | |
e294797a JB |
3743 | |
3744 | static int | |
3745 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3746 | void *data) | |
3747 | { | |
3748 | procinfo *pi = data; | |
3749 | int fd; | |
3750 | ||
3751 | #ifdef NEW_PROC_API | |
3752 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3753 | ||
3754 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3755 | return -1; /* sanity */ | |
3756 | ||
3757 | if (map->pr_mapname[0] == 0) | |
3758 | { | |
3759 | fd = -1; /* no map file */ | |
3760 | } | |
3761 | else | |
3762 | { | |
3763 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3764 | /* Note: caller's responsibility to close this fd! */ | |
3765 | fd = open_with_retry (name, O_RDONLY); | |
3766 | /* Note: we don't test the above call for failure; | |
3767 | we just pass the FD on as given. Sometimes there is | |
3768 | no file, so the open may return failure, but that's | |
3769 | not a problem. */ | |
3770 | } | |
3771 | #else | |
3772 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3773 | /* Note: we don't test the above call for failure; | |
3774 | we just pass the FD on as given. Sometimes there is | |
3775 | no file, so the ioctl may return failure, but that's | |
3776 | not a problem. */ | |
3777 | #endif | |
3778 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3779 | } | |
3780 | ||
7434dadd JB |
3781 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3782 | insert a breakpoint at this location and return nonzero. Return | |
3783 | zero otherwise. */ | |
3784 | ||
3785 | static int | |
3786 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
77382aee PA |
3787 | iterate_over_mappings_cb_ftype *child_func, |
3788 | void *data) | |
7434dadd JB |
3789 | { |
3790 | procinfo *pi = (procinfo *) data; | |
3791 | ||
3792 | /* We know the symbol we're looking for is in a text region, so | |
3793 | only look for it if the region is a text one. */ | |
3794 | if (map->pr_mflags & MA_EXEC) | |
3795 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3796 | ||
3797 | return 0; | |
3798 | } | |
3799 | ||
3800 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3801 | insert a breakpoint at its location, and return nonzero. Return zero | |
3802 | otherwise. */ | |
3803 | ||
3804 | static int | |
3805 | insert_dbx_link_breakpoint (procinfo *pi) | |
3806 | { | |
3807 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3808 | } | |
3809 | #endif | |
3810 | ||
77382aee PA |
3811 | /* Retrieve the next stop event from the child process. If child has |
3812 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3813 | (or possibly wait eventcodes) into gdb internal event codes. | |
3814 | Returns the id of process (and possibly thread) that incurred the | |
3815 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3816 | |
39f77062 | 3817 | static ptid_t |
117de6a9 | 3818 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3819 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3820 | { |
c3f6f71d JM |
3821 | /* First cut: loosely based on original version 2.1 */ |
3822 | procinfo *pi; | |
39f77062 KB |
3823 | int wstat; |
3824 | int temp_tid; | |
3825 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3826 | int why, what, flags; |
3827 | int retry = 0; | |
c906108c | 3828 | |
c3f6f71d | 3829 | wait_again: |
c906108c | 3830 | |
c3f6f71d JM |
3831 | retry++; |
3832 | wstat = 0; | |
39f77062 | 3833 | retval = pid_to_ptid (-1); |
c906108c | 3834 | |
c3f6f71d | 3835 | /* Find procinfo for main process */ |
39f77062 | 3836 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3837 | if (pi) |
c906108c | 3838 | { |
c3f6f71d JM |
3839 | /* We must assume that the status is stale now... */ |
3840 | pi->status_valid = 0; | |
3841 | pi->gregs_valid = 0; | |
3842 | pi->fpregs_valid = 0; | |
3843 | ||
3844 | #if 0 /* just try this out... */ | |
3845 | flags = proc_flags (pi); | |
3846 | why = proc_why (pi); | |
3847 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3848 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3849 | #endif | |
3850 | /* If child is not stopped, wait for it to stop. */ | |
3851 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3852 | !proc_wait_for_stop (pi)) | |
c906108c | 3853 | { |
c3f6f71d JM |
3854 | /* wait_for_stop failed: has the child terminated? */ |
3855 | if (errno == ENOENT) | |
c906108c | 3856 | { |
39f77062 KB |
3857 | int wait_retval; |
3858 | ||
c3f6f71d | 3859 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3860 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3861 | |
39f77062 | 3862 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 3863 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 3864 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3865 | /* FIXME: might I not just use waitpid? |
3866 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3867 | retval = pid_to_ptid (wait_retval); |
c906108c | 3868 | } |
d1566ff5 FN |
3869 | else if (errno == EINTR) |
3870 | goto wait_again; | |
c3f6f71d | 3871 | else |
c906108c | 3872 | { |
c3f6f71d JM |
3873 | /* Unknown error from wait_for_stop. */ |
3874 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3875 | } |
c3f6f71d JM |
3876 | } |
3877 | else | |
3878 | { | |
3879 | /* This long block is reached if either: | |
3880 | a) the child was already stopped, or | |
3881 | b) we successfully waited for the child with wait_for_stop. | |
3882 | This block will analyze the /proc status, and translate it | |
3883 | into a waitstatus for GDB. | |
3884 | ||
3885 | If we actually had to call wait because the /proc file | |
19958708 | 3886 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3887 | because we already have a waitstatus. */ |
3888 | ||
3889 | flags = proc_flags (pi); | |
3890 | why = proc_why (pi); | |
3891 | what = proc_what (pi); | |
3892 | ||
c3f6f71d | 3893 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3894 | { |
c3f6f71d JM |
3895 | #ifdef PR_ASYNC |
3896 | /* If it's running async (for single_thread control), | |
3897 | set it back to normal again. */ | |
3898 | if (flags & PR_ASYNC) | |
3899 | if (!proc_unset_async (pi)) | |
3900 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3901 | #endif | |
3902 | ||
3903 | if (info_verbose) | |
3904 | proc_prettyprint_why (why, what, 1); | |
3905 | ||
3906 | /* The 'pid' we will return to GDB is composed of | |
3907 | the process ID plus the lwp ID. */ | |
3908 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3909 | ||
3910 | switch (why) { | |
3911 | case PR_SIGNALLED: | |
3912 | wstat = (what << 8) | 0177; | |
3913 | break; | |
3914 | case PR_SYSENTRY: | |
37de36c6 | 3915 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3916 | { |
17faa917 DJ |
3917 | if (print_thread_events) |
3918 | printf_unfiltered (_("[%s exited]\n"), | |
3919 | target_pid_to_str (retval)); | |
37de36c6 KB |
3920 | delete_thread (retval); |
3921 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3922 | return retval; | |
3923 | } | |
3924 | else if (syscall_is_exit (pi, what)) | |
3925 | { | |
181e7f93 PA |
3926 | struct inferior *inf; |
3927 | ||
37de36c6 KB |
3928 | /* Handle SYS_exit call only */ |
3929 | /* Stopped at entry to SYS_exit. | |
19958708 | 3930 | Make it runnable, resume it, then use |
37de36c6 | 3931 | the wait system call to get its exit code. |
19958708 | 3932 | Proc_run_process always clears the current |
37de36c6 KB |
3933 | fault and signal. |
3934 | Then return its exit status. */ | |
3935 | pi->status_valid = 0; | |
3936 | wstat = 0; | |
19958708 | 3937 | /* FIXME: what we should do is return |
37de36c6 KB |
3938 | TARGET_WAITKIND_SPURIOUS. */ |
3939 | if (!proc_run_process (pi, 0, 0)) | |
3940 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3941 | |
3942 | inf = find_inferior_pid (pi->pid); | |
3943 | if (inf->attach_flag) | |
c3f6f71d | 3944 | { |
19958708 | 3945 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3946 | return a "success" exit code. Bogus: what if |
3947 | it returns something else? */ | |
3948 | wstat = 0; | |
39f77062 | 3949 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3950 | } |
3951 | else | |
3952 | { | |
3953 | int temp = wait (&wstat); | |
3954 | ||
3955 | /* FIXME: shouldn't I make sure I get the right | |
3956 | event from the right process? If (for | |
3957 | instance) I have killed an earlier inferior | |
3958 | process but failed to clean up after it | |
3959 | somehow, I could get its termination event | |
3960 | here. */ | |
3961 | ||
3962 | /* If wait returns -1, that's what we return to GDB. */ | |
3963 | if (temp < 0) | |
39f77062 | 3964 | retval = pid_to_ptid (temp); |
c3f6f71d | 3965 | } |
c3f6f71d | 3966 | } |
37de36c6 KB |
3967 | else |
3968 | { | |
a3f17187 | 3969 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3970 | proc_prettyprint_syscall (proc_what (pi), 0); |
3971 | printf_filtered ("\n"); | |
3972 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3973 | { |
37de36c6 | 3974 | long i, nsysargs, *sysargs; |
c3f6f71d | 3975 | |
37de36c6 KB |
3976 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3977 | (sysargs = proc_sysargs (pi)) != NULL) | |
3978 | { | |
a3f17187 | 3979 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 3980 | for (i = 0; i < nsysargs; i++) |
19958708 | 3981 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3982 | i, sysargs[i]); |
3983 | } | |
c3f6f71d | 3984 | |
c3f6f71d | 3985 | } |
c3f6f71d | 3986 | #endif |
37de36c6 KB |
3987 | if (status) |
3988 | { | |
3989 | /* How to exit gracefully, returning "unknown event" */ | |
3990 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 3991 | return inferior_ptid; |
37de36c6 KB |
3992 | } |
3993 | else | |
3994 | { | |
3995 | /* How to keep going without returning to wfi: */ | |
39f77062 | 3996 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
3997 | goto wait_again; |
3998 | } | |
3999 | } | |
4000 | break; | |
4001 | case PR_SYSEXIT: | |
4002 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4003 | { |
37de36c6 KB |
4004 | /* Hopefully this is our own "fork-child" execing |
4005 | the real child. Hoax this event into a trap, and | |
4006 | GDB will see the child about to execute its start | |
4007 | address. */ | |
4008 | wstat = (SIGTRAP << 8) | 0177; | |
4009 | } | |
9185ddce | 4010 | #ifdef SYS_syssgi |
77382aee PA |
4011 | else if (what == SYS_syssgi) |
4012 | { | |
4013 | /* see if we can break on dbx_link(). If yes, then | |
4014 | we no longer need the SYS_syssgi notifications. */ | |
4015 | if (insert_dbx_link_breakpoint (pi)) | |
4016 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4017 | FLAG_RESET, 0); | |
4018 | ||
4019 | /* This is an internal event and should be transparent | |
4020 | to wfi, so resume the execution and wait again. See | |
4021 | comment in procfs_init_inferior() for more details. */ | |
4022 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4023 | goto wait_again; | |
4024 | } | |
9185ddce | 4025 | #endif |
37de36c6 KB |
4026 | else if (syscall_is_lwp_create (pi, what)) |
4027 | { | |
77382aee PA |
4028 | /* This syscall is somewhat like fork/exec. We |
4029 | will get the event twice: once for the parent | |
4030 | LWP, and once for the child. We should already | |
4031 | know about the parent LWP, but the child will | |
4032 | be new to us. So, whenever we get this event, | |
4033 | if it represents a new thread, simply add the | |
4034 | thread to the list. */ | |
c3f6f71d | 4035 | |
37de36c6 | 4036 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4037 | temp_tid = proc_get_current_thread (pi); |
4038 | if (!find_procinfo (pi->pid, temp_tid)) | |
4039 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4040 | |
39f77062 | 4041 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4042 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4043 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4044 | add_thread (temp_ptid); |
4045 | ||
37de36c6 KB |
4046 | /* Return to WFI, but tell it to immediately resume. */ |
4047 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4048 | return inferior_ptid; |
37de36c6 KB |
4049 | } |
4050 | else if (syscall_is_lwp_exit (pi, what)) | |
4051 | { | |
17faa917 DJ |
4052 | if (print_thread_events) |
4053 | printf_unfiltered (_("[%s exited]\n"), | |
4054 | target_pid_to_str (retval)); | |
37de36c6 KB |
4055 | delete_thread (retval); |
4056 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4057 | return retval; | |
c3f6f71d | 4058 | } |
37de36c6 KB |
4059 | else if (0) |
4060 | { | |
4061 | /* FIXME: Do we need to handle SYS_sproc, | |
4062 | SYS_fork, or SYS_vfork here? The old procfs | |
4063 | seemed to use this event to handle threads on | |
4064 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4065 | that threads were actually separate processes. |
37de36c6 KB |
4066 | Irix, maybe? Anyway, low priority for now. */ |
4067 | } | |
4068 | else | |
4069 | { | |
a3f17187 | 4070 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4071 | proc_prettyprint_syscall (proc_what (pi), 0); |
4072 | printf_filtered ("\n"); | |
4073 | #ifndef PIOCSSPCACT | |
4074 | { | |
4075 | long i, nsysargs, *sysargs; | |
4076 | ||
4077 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4078 | (sysargs = proc_sysargs (pi)) != NULL) | |
4079 | { | |
77382aee PA |
4080 | printf_filtered (_("%ld syscall arguments:\n"), |
4081 | nsysargs); | |
37de36c6 | 4082 | for (i = 0; i < nsysargs; i++) |
19958708 | 4083 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4084 | i, sysargs[i]); |
4085 | } | |
4086 | } | |
c3f6f71d | 4087 | #endif |
37de36c6 | 4088 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4089 | return inferior_ptid; |
37de36c6 | 4090 | } |
c3f6f71d JM |
4091 | break; |
4092 | case PR_REQUESTED: | |
4093 | #if 0 /* FIXME */ | |
4094 | wstat = (SIGSTOP << 8) | 0177; | |
4095 | break; | |
4096 | #else | |
4097 | if (retry < 5) | |
4098 | { | |
a3f17187 | 4099 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4100 | pi->status_valid = 0; |
4101 | goto wait_again; | |
4102 | } | |
4103 | else | |
4104 | { | |
4105 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4106 | temp_tid = proc_get_current_thread (pi); |
4107 | if (!find_procinfo (pi->pid, temp_tid)) | |
4108 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4109 | |
4110 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4111 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4112 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4113 | add_thread (temp_ptid); |
c3f6f71d JM |
4114 | |
4115 | status->kind = TARGET_WAITKIND_STOPPED; | |
4116 | status->value.sig = 0; | |
4117 | return retval; | |
4118 | } | |
4119 | #endif | |
4120 | case PR_JOBCONTROL: | |
4121 | wstat = (what << 8) | 0177; | |
4122 | break; | |
4123 | case PR_FAULTED: | |
7af6341f | 4124 | switch (what) { |
c3f6f71d JM |
4125 | #ifdef FLTWATCH |
4126 | case FLTWATCH: | |
4127 | wstat = (SIGTRAP << 8) | 0177; | |
4128 | break; | |
4129 | #endif | |
4130 | #ifdef FLTKWATCH | |
4131 | case FLTKWATCH: | |
4132 | wstat = (SIGTRAP << 8) | 0177; | |
4133 | break; | |
4134 | #endif | |
4135 | /* FIXME: use si_signo where possible. */ | |
4136 | case FLTPRIV: | |
4137 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4138 | case FLTILL: | |
4139 | #endif | |
4140 | wstat = (SIGILL << 8) | 0177; | |
4141 | break; | |
4142 | case FLTBPT: | |
4143 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4144 | case FLTTRACE: | |
4145 | #endif | |
77382aee PA |
4146 | /* If we hit our __dbx_link() internal breakpoint, |
4147 | then remove it. See comments in procfs_init_inferior() | |
4148 | for more details. */ | |
4149 | if (dbx_link_bpt_addr != 0 | |
4150 | && dbx_link_bpt_addr | |
fb14de7b | 4151 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 4152 | remove_dbx_link_breakpoint (); |
9185ddce | 4153 | |
c3f6f71d JM |
4154 | wstat = (SIGTRAP << 8) | 0177; |
4155 | break; | |
4156 | case FLTSTACK: | |
4157 | case FLTACCESS: | |
4158 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4159 | case FLTBOUNDS: | |
4160 | #endif | |
4161 | wstat = (SIGSEGV << 8) | 0177; | |
4162 | break; | |
4163 | case FLTIOVF: | |
4164 | case FLTIZDIV: | |
4165 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4166 | case FLTFPE: | |
4167 | #endif | |
4168 | wstat = (SIGFPE << 8) | 0177; | |
4169 | break; | |
4170 | case FLTPAGE: /* Recoverable page fault */ | |
4171 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4172 | retval = pid_to_ptid (-1); |
c3f6f71d | 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 | } | |
4179 | break; /* case PR_FAULTED: */ | |
4180 | default: /* switch (why) unmatched */ | |
4181 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4182 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4183 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4184 | error (_("... giving up...")); |
c3f6f71d JM |
4185 | break; |
4186 | } | |
77382aee PA |
4187 | /* Got this far without error: If retval isn't in the |
4188 | threads database, add it. */ | |
39f77062 KB |
4189 | if (PIDGET (retval) > 0 && |
4190 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4191 | !in_thread_list (retval)) |
c906108c | 4192 | { |
77382aee PA |
4193 | /* We have a new thread. We need to add it both to |
4194 | GDB's list and to our own. If we don't create a | |
4195 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
4196 | add_thread (retval); |
4197 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4198 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4199 | } |
c906108c | 4200 | } |
c3f6f71d | 4201 | else /* flags do not indicate STOPPED */ |
c906108c | 4202 | { |
c3f6f71d JM |
4203 | /* surely this can't happen... */ |
4204 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4205 | __LINE__); | |
4206 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4207 | error (_("procfs: ...giving up...")); |
c906108c | 4208 | } |
c906108c | 4209 | } |
c906108c | 4210 | |
c3f6f71d JM |
4211 | if (status) |
4212 | store_waitstatus (status, wstat); | |
c906108c SS |
4213 | } |
4214 | ||
c3f6f71d JM |
4215 | return retval; |
4216 | } | |
c906108c | 4217 | |
4e73f23d RM |
4218 | /* Perform a partial transfer to/from the specified object. For |
4219 | memory transfers, fall back to the old memory xfer functions. */ | |
4220 | ||
4221 | static LONGEST | |
4222 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4223 | const char *annex, gdb_byte *readbuf, |
4224 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4225 | { |
4226 | switch (object) | |
4227 | { | |
4228 | case TARGET_OBJECT_MEMORY: | |
4229 | if (readbuf) | |
0b62613e PA |
4230 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4231 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4232 | if (writebuf) |
0b62613e PA |
4233 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4234 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4235 | return -1; |
4236 | ||
4237 | #ifdef NEW_PROC_API | |
4238 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4239 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4240 | offset, len); |
4241 | #endif | |
4242 | ||
4243 | default: | |
4244 | if (ops->beneath != NULL) | |
4245 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4246 | readbuf, writebuf, offset, len); | |
4247 | return -1; | |
4248 | } | |
4249 | } | |
4250 | ||
4251 | ||
d0849a9a KB |
4252 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4253 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4254 | otherwise transfer them from the target. TARGET is unused. | |
4255 | ||
4256 | The return value is 0 if an error occurred or no bytes were | |
4257 | transferred. Otherwise, it will be a positive value which | |
4258 | indicates the number of bytes transferred between gdb and the | |
4259 | target. (Note that the interface also makes provisions for | |
4260 | negative values, but this capability isn't implemented here.) */ | |
4261 | ||
c3f6f71d | 4262 | static int |
0b62613e | 4263 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4264 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4265 | { |
4266 | procinfo *pi; | |
4267 | int nbytes = 0; | |
c906108c | 4268 | |
c3f6f71d | 4269 | /* Find procinfo for main process */ |
39f77062 | 4270 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4271 | if (pi->as_fd == 0 && |
4272 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4273 | { |
c3f6f71d JM |
4274 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4275 | return 0; | |
c906108c | 4276 | } |
c906108c | 4277 | |
c3f6f71d | 4278 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4279 | { |
c3f6f71d | 4280 | if (dowrite) |
c906108c | 4281 | { |
c3f6f71d | 4282 | #ifdef NEW_PROC_API |
cce7e648 | 4283 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4284 | #else |
cce7e648 | 4285 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4286 | #endif |
c3f6f71d | 4287 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4288 | } |
c3f6f71d | 4289 | else |
c906108c | 4290 | { |
cce7e648 | 4291 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4292 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4293 | } |
c3f6f71d | 4294 | if (nbytes < 0) |
c906108c | 4295 | { |
c3f6f71d | 4296 | nbytes = 0; |
c906108c | 4297 | } |
c906108c | 4298 | } |
c3f6f71d | 4299 | return nbytes; |
c906108c SS |
4300 | } |
4301 | ||
77382aee PA |
4302 | /* Called by target_resume before making child runnable. Mark cached |
4303 | registers and status's invalid. If there are "dirty" caches that | |
4304 | need to be written back to the child process, do that. | |
c906108c | 4305 | |
77382aee PA |
4306 | File descriptors are also cached. As they are a limited resource, |
4307 | we cannot hold onto them indefinitely. However, as they are | |
4308 | expensive to open, we don't want to throw them away | |
4309 | indescriminately either. As a compromise, we will keep the file | |
4310 | descriptors for the parent process, but discard any file | |
4311 | descriptors we may have accumulated for the threads. | |
4312 | ||
4313 | As this function is called by iterate_over_threads, it always | |
4314 | returns zero (so that iterate_over_threads will keep | |
4315 | iterating). */ | |
c3f6f71d JM |
4316 | |
4317 | static int | |
fba45db2 | 4318 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4319 | { |
77382aee PA |
4320 | /* About to run the child; invalidate caches and do any other |
4321 | cleanup. */ | |
c906108c | 4322 | |
c3f6f71d JM |
4323 | #if 0 |
4324 | if (pi->gregs_dirty) | |
4325 | if (parent == NULL || | |
4326 | proc_get_current_thread (parent) != pi->tid) | |
4327 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4328 | proc_warn (pi, "target_resume, set_gregs", | |
4329 | __LINE__); | |
a97b0ac8 | 4330 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4331 | if (pi->fpregs_dirty) |
4332 | if (parent == NULL || | |
4333 | proc_get_current_thread (parent) != pi->tid) | |
4334 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4335 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4336 | __LINE__); |
c906108c | 4337 | #endif |
c906108c | 4338 | |
c3f6f71d | 4339 | if (parent != NULL) |
c906108c | 4340 | { |
c3f6f71d | 4341 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4342 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4343 | We don't do this to the master (parent) procinfo. */ |
4344 | ||
4345 | close_procinfo_files (pi); | |
c906108c | 4346 | } |
c3f6f71d JM |
4347 | pi->gregs_valid = 0; |
4348 | pi->fpregs_valid = 0; | |
4349 | #if 0 | |
4350 | pi->gregs_dirty = 0; | |
4351 | pi->fpregs_dirty = 0; | |
c906108c | 4352 | #endif |
c3f6f71d JM |
4353 | pi->status_valid = 0; |
4354 | pi->threads_valid = 0; | |
c906108c | 4355 | |
c3f6f71d | 4356 | return 0; |
c906108c SS |
4357 | } |
4358 | ||
0fda6bd2 | 4359 | #if 0 |
77382aee PA |
4360 | /* A callback function for iterate_over_threads. Find the |
4361 | asynchronous signal thread, and make it runnable. See if that | |
4362 | helps matters any. */ | |
c906108c | 4363 | |
c3f6f71d | 4364 | static int |
fba45db2 | 4365 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4366 | { |
c3f6f71d JM |
4367 | #ifdef PR_ASLWP |
4368 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4369 | { |
c3f6f71d JM |
4370 | if (!proc_run_process (pi, 0, -1)) |
4371 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4372 | return 1; | |
c906108c | 4373 | } |
c906108c | 4374 | #endif |
c3f6f71d | 4375 | return 0; |
c906108c | 4376 | } |
0fda6bd2 | 4377 | #endif |
c906108c | 4378 | |
77382aee PA |
4379 | /* Make the child process runnable. Normally we will then call |
4380 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4381 | ||
4382 | If STEP is true, then arrange for the child to stop again after | |
4383 | executing a single instruction. If SIGNO is zero, then cancel any | |
4384 | pending signal; if non-zero, then arrange for the indicated signal | |
4385 | to be delivered to the child when it runs. If PID is -1, then | |
4386 | allow any child thread to run; if non-zero, then allow only the | |
4387 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4388 | |
4389 | static void | |
28439f5e PA |
4390 | procfs_resume (struct target_ops *ops, |
4391 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4392 | { |
c3f6f71d JM |
4393 | procinfo *pi, *thread; |
4394 | int native_signo; | |
4395 | ||
19958708 | 4396 | /* 2.1: |
c3f6f71d | 4397 | prrun.prflags |= PRSVADDR; |
19958708 | 4398 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4399 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4400 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4401 | prrun.prflags |= PRCFAULT; clear current fault. |
4402 | ||
4403 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4404 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4405 | PRSVADDR is unnecessary. |
4406 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4407 | This basically leaves PRSTEP and PRCSIG. | |
4408 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4409 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4410 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d JM |
4411 | |
4412 | /* Find procinfo for main process */ | |
39f77062 | 4413 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4414 | |
77382aee | 4415 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4416 | errno = 0; |
c906108c | 4417 | |
c3f6f71d JM |
4418 | /* Convert signal to host numbering. */ |
4419 | if (signo == 0 || | |
0fda6bd2 | 4420 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4421 | native_signo = 0; |
4422 | else | |
4423 | native_signo = target_signal_to_host (signo); | |
c906108c | 4424 | |
c3f6f71d | 4425 | pi->ignore_next_sigstop = 0; |
c906108c | 4426 | |
77382aee PA |
4427 | /* Running the process voids all cached registers and status. */ |
4428 | /* Void the threads' caches first. */ | |
19958708 | 4429 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4430 | /* Void the process procinfo's caches. */ |
4431 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4432 | |
39f77062 | 4433 | if (PIDGET (ptid) != -1) |
c906108c | 4434 | { |
77382aee PA |
4435 | /* Resume a specific thread, presumably suppressing the |
4436 | others. */ | |
39f77062 | 4437 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4438 | if (thread != NULL) |
c906108c | 4439 | { |
c3f6f71d JM |
4440 | if (thread->tid != 0) |
4441 | { | |
77382aee PA |
4442 | /* We're to resume a specific thread, and not the |
4443 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4444 | #ifdef PR_ASYNC |
4445 | if (!proc_set_async (pi)) | |
4446 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4447 | #endif | |
4448 | #if 0 | |
19958708 | 4449 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4450 | make_signal_thread_runnable, |
4451 | NULL); | |
4452 | #endif | |
4453 | pi = thread; /* substitute the thread's procinfo for run */ | |
4454 | } | |
c906108c SS |
4455 | } |
4456 | } | |
c906108c | 4457 | |
c3f6f71d | 4458 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4459 | { |
c3f6f71d | 4460 | if (errno == EBUSY) |
77382aee PA |
4461 | warning (_("resume: target already running. " |
4462 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4463 | else |
4464 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4465 | } |
c3f6f71d | 4466 | } |
c906108c | 4467 | |
77382aee PA |
4468 | /* Traverse the list of signals that GDB knows about (see "handle" |
4469 | command), and arrange for the target to be stopped or not, | |
4470 | according to these settings. Returns non-zero for success, zero | |
4471 | for failure. */ | |
c906108c | 4472 | |
c3f6f71d | 4473 | static int |
37de36c6 | 4474 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4475 | { |
4476 | int signo; | |
c906108c | 4477 | |
c3f6f71d JM |
4478 | for (signo = 0; signo < NSIG; signo ++) |
4479 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4480 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4481 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
3c95f01c | 4482 | gdb_prdelset (signals, signo); |
c3f6f71d | 4483 | else |
3c95f01c | 4484 | gdb_praddset (signals, signo); |
c906108c | 4485 | |
c3f6f71d | 4486 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4487 | } |
4488 | ||
77382aee | 4489 | /* Set up to trace signals in the child process. */ |
c906108c | 4490 | |
c3f6f71d | 4491 | static void |
39f77062 | 4492 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4493 | { |
37de36c6 | 4494 | gdb_sigset_t signals; |
39f77062 | 4495 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4496 | |
c3f6f71d JM |
4497 | if (proc_get_traced_signals (pi, &signals) && |
4498 | register_gdb_signals (pi, &signals)) | |
4499 | return; | |
4500 | else | |
4501 | proc_error (pi, "notice_signals", __LINE__); | |
4502 | } | |
c906108c | 4503 | |
77382aee | 4504 | /* Print status information about the child process. */ |
c906108c | 4505 | |
c3f6f71d | 4506 | static void |
fba45db2 | 4507 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4508 | { |
181e7f93 | 4509 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4510 | |
a3f17187 | 4511 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4512 | inf->attach_flag? "attached": "child", |
39f77062 | 4513 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4514 | } |
c906108c | 4515 | |
77382aee PA |
4516 | /* Stop the child process asynchronously, as when the gdb user types |
4517 | control-c or presses a "stop" button. Works by sending | |
4518 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4519 | |
c3f6f71d | 4520 | static void |
f9c72d52 | 4521 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4522 | { |
7e1789f5 | 4523 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4524 | } |
4525 | ||
77382aee PA |
4526 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4527 | should only be applied to the real process, not to an LWP, because | |
4528 | of the check for parent-process. If we need this to work for an | |
4529 | LWP, it needs some more logic. */ | |
c906108c | 4530 | |
c3f6f71d | 4531 | static void |
fba45db2 | 4532 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4533 | { |
4534 | int parent_pid; | |
c906108c | 4535 | |
c3f6f71d JM |
4536 | parent_pid = proc_parent_pid (pi); |
4537 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4538 | /* FIXME: use access functions */ | |
4539 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4540 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4541 | file for the inferior. */ | |
4542 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4543 | { | |
4544 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4545 | } | |
4546 | #endif | |
4547 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4548 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4549 | to kill the inferior, otherwise it might remain stopped with a | |
4550 | pending SIGKILL. | |
4551 | We do not check the result of the PIOCSSIG, the inferior might have | |
4552 | died already. */ | |
4553 | { | |
37de36c6 | 4554 | gdb_siginfo_t newsiginfo; |
c906108c | 4555 | |
c3f6f71d JM |
4556 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4557 | newsiginfo.si_signo = SIGKILL; | |
4558 | newsiginfo.si_code = 0; | |
4559 | newsiginfo.si_errno = 0; | |
4560 | newsiginfo.si_pid = getpid (); | |
4561 | newsiginfo.si_uid = getuid (); | |
4562 | /* FIXME: use proc_set_current_signal */ | |
4563 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4564 | } | |
4565 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4566 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4567 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4568 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4569 | destroy_procinfo (pi); | |
c906108c | 4570 | |
c3f6f71d JM |
4571 | /* If pi is GDB's child, wait for it to die. */ |
4572 | if (parent_pid == getpid ()) | |
19958708 | 4573 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4574 | Should we check the returned event? */ |
4575 | { | |
0d06e24b | 4576 | #if 0 |
c3f6f71d | 4577 | int status, ret; |
c906108c | 4578 | |
c3f6f71d JM |
4579 | ret = waitpid (pi->pid, &status, 0); |
4580 | #else | |
4581 | wait (NULL); | |
4582 | #endif | |
4583 | } | |
4584 | } | |
c906108c | 4585 | |
77382aee PA |
4586 | /* We're done debugging it, and we want it to go away. Then we want |
4587 | GDB to forget all about it. */ | |
c906108c | 4588 | |
19958708 | 4589 | static void |
7d85a9c0 | 4590 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4591 | { |
39f77062 | 4592 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4593 | { |
4594 | /* Find procinfo for main process */ | |
39f77062 | 4595 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4596 | |
c3f6f71d JM |
4597 | if (pi) |
4598 | unconditionally_kill_inferior (pi); | |
4599 | target_mourn_inferior (); | |
c906108c | 4600 | } |
c3f6f71d JM |
4601 | } |
4602 | ||
77382aee | 4603 | /* Forget we ever debugged this thing! */ |
c906108c | 4604 | |
19958708 | 4605 | static void |
136d6dae | 4606 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4607 | { |
4608 | procinfo *pi; | |
c906108c | 4609 | |
39f77062 | 4610 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4611 | { |
4612 | /* Find procinfo for main process */ | |
39f77062 | 4613 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4614 | if (pi) |
4615 | destroy_procinfo (pi); | |
c906108c | 4616 | } |
28439f5e | 4617 | unpush_target (ops); |
8181d85f DJ |
4618 | |
4619 | if (dbx_link_bpt != NULL) | |
4620 | { | |
a6d9a66e | 4621 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4622 | dbx_link_bpt_addr = 0; |
4623 | dbx_link_bpt = NULL; | |
4624 | } | |
4625 | ||
c3f6f71d JM |
4626 | generic_mourn_inferior (); |
4627 | } | |
c906108c | 4628 | |
77382aee PA |
4629 | /* When GDB forks to create a runnable inferior process, this function |
4630 | is called on the parent side of the fork. It's job is to do | |
4631 | whatever is necessary to make the child ready to be debugged, and | |
4632 | then wait for the child to synchronize. */ | |
c906108c | 4633 | |
19958708 | 4634 | static void |
28439f5e | 4635 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4636 | { |
4637 | procinfo *pi; | |
37de36c6 | 4638 | gdb_sigset_t signals; |
c3f6f71d | 4639 | int fail; |
2689673f | 4640 | int lwpid; |
c906108c | 4641 | |
c3f6f71d JM |
4642 | /* This routine called on the parent side (GDB side) |
4643 | after GDB forks the inferior. */ | |
28439f5e | 4644 | push_target (ops); |
c906108c | 4645 | |
c3f6f71d JM |
4646 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4647 | perror ("procfs: out of memory in 'init_inferior'"); | |
4648 | ||
4649 | if (!open_procinfo_files (pi, FD_CTL)) | |
4650 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4651 | ||
4652 | /* | |
4653 | xmalloc // done | |
4654 | open_procinfo_files // done | |
4655 | link list // done | |
4656 | prfillset (trace) | |
4657 | procfs_notice_signals | |
4658 | prfillset (fault) | |
4659 | prdelset (FLTPAGE) | |
4660 | PIOCWSTOP | |
4661 | PIOCSFAULT | |
4662 | */ | |
4663 | ||
77382aee | 4664 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4665 | if (!(proc_flags (pi) & PR_STOPPED) && |
4666 | !(proc_wait_for_stop (pi))) | |
4667 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4668 | ||
4669 | /* Save some of the /proc state to be restored if we detach. */ | |
4670 | /* FIXME: Why? In case another debugger was debugging it? | |
4671 | We're it's parent, for Ghu's sake! */ | |
4672 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4673 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4674 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4675 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4676 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4677 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4678 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4679 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4680 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4681 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4682 | ||
77382aee | 4683 | /* Register to trace selected signals in the child. */ |
c3f6f71d JM |
4684 | prfillset (&signals); |
4685 | if (!register_gdb_signals (pi, &signals)) | |
4686 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4687 | ||
4688 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4689 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4690 | ||
0d06e24b JM |
4691 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4692 | and possibly even turning ON kill-on-last-close at this point. But | |
4693 | I can't make that change without careful testing which I don't have | |
4694 | time to do right now... */ | |
c3f6f71d JM |
4695 | /* Turn on run-on-last-close flag so that the child |
4696 | will die if GDB goes away for some reason. */ | |
4697 | if (!proc_set_run_on_last_close (pi)) | |
4698 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4699 | ||
2689673f PA |
4700 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4701 | lwpid = proc_get_current_thread (pi); | |
4702 | ||
4703 | /* Create a procinfo for the main lwp. */ | |
4704 | create_procinfo (pid, lwpid); | |
4705 | ||
4706 | /* We already have a main thread registered in the thread table at | |
4707 | this point, but it didn't have any lwp info yet. Notify the core | |
4708 | about it. This changes inferior_ptid as well. */ | |
4709 | thread_change_ptid (pid_to_ptid (pid), | |
4710 | MERGEPID (pid, lwpid)); | |
c906108c | 4711 | |
46ac7a5d AC |
4712 | /* Typically two, one trap to exec the shell, one to exec the |
4713 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4714 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4715 | |
4716 | #ifdef SYS_syssgi | |
4717 | /* On mips-irix, we need to stop the inferior early enough during | |
4718 | the startup phase in order to be able to load the shared library | |
4719 | symbols and insert the breakpoints that are located in these shared | |
4720 | libraries. Stopping at the program entry point is not good enough | |
4721 | because the -init code is executed before the execution reaches | |
4722 | that point. | |
4723 | ||
4724 | So what we need to do is to insert a breakpoint in the runtime | |
4725 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4726 | called by rld once all shared libraries have been mapped, but before | |
4727 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4728 | as rld is not part of the executable we are running, and thus we need | |
4729 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4730 | |
9185ddce JB |
4731 | For this, we trace all syssgi() syscall exit events. Each time |
4732 | we detect such an event, we iterate over each text memory maps, | |
4733 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4734 | When found, we know that rld has been mapped, and that we can insert | |
4735 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4736 | has been inserted, the syssgi() notifications are no longer necessary, | |
4737 | so they should be canceled. */ | |
4738 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4739 | #endif |
c3f6f71d | 4740 | } |
c906108c | 4741 | |
77382aee PA |
4742 | /* When GDB forks to create a new process, this function is called on |
4743 | the child side of the fork before GDB exec's the user program. Its | |
4744 | job is to make the child minimally debuggable, so that the parent | |
4745 | GDB process can connect to the child and take over. This function | |
4746 | should do only the minimum to make that possible, and to | |
4747 | synchronize with the parent process. The parent process should | |
4748 | take care of the details. */ | |
c3f6f71d JM |
4749 | |
4750 | static void | |
fba45db2 | 4751 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4752 | { |
4753 | /* This routine called on the child side (inferior side) | |
4754 | after GDB forks the inferior. It must use only local variables, | |
4755 | because it may be sharing data space with its parent. */ | |
c906108c | 4756 | |
c3f6f71d | 4757 | procinfo *pi; |
37de36c6 | 4758 | sysset_t *exitset; |
c906108c | 4759 | |
c3f6f71d | 4760 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4761 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4762 | |
c3f6f71d JM |
4763 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4764 | { | |
4765 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4766 | gdb_flush (gdb_stderr); | |
77382aee PA |
4767 | /* No need to call "dead_procinfo", because we're going to |
4768 | exit. */ | |
c3f6f71d JM |
4769 | _exit (127); |
4770 | } | |
c906108c | 4771 | |
c3f6f71d JM |
4772 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4773 | /* OSF method for tracing exec syscalls. Quoting: | |
4774 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4775 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4776 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4777 | { |
4778 | int prfs_flags; | |
c906108c | 4779 | |
c3f6f71d JM |
4780 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4781 | { | |
4782 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4783 | gdb_flush (gdb_stderr); | |
4784 | _exit (127); | |
4785 | } | |
4786 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4787 | |
c3f6f71d JM |
4788 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4789 | { | |
4790 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4791 | gdb_flush (gdb_stderr); | |
4792 | _exit (127); | |
4793 | } | |
4794 | } | |
4795 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4796 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4797 | /* GW: Rationale... |
4798 | Not all systems with /proc have all the exec* syscalls with the same | |
4799 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4800 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4801 | |
37de36c6 KB |
4802 | exitset = sysset_t_alloc (pi); |
4803 | gdb_premptysysset (exitset); | |
c3f6f71d | 4804 | #ifdef SYS_exec |
37de36c6 | 4805 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4806 | #endif |
4807 | #ifdef SYS_execve | |
37de36c6 | 4808 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4809 | #endif |
4810 | #ifdef SYS_execv | |
37de36c6 | 4811 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4812 | #endif |
37de36c6 KB |
4813 | #ifdef DYNAMIC_SYSCALLS |
4814 | { | |
4815 | int callnum = find_syscall (pi, "execve"); | |
4816 | ||
4817 | if (callnum >= 0) | |
4818 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4819 | |
37de36c6 KB |
4820 | callnum = find_syscall (pi, "ra_execve"); |
4821 | if (callnum >= 0) | |
4822 | gdb_praddsysset (exitset, callnum); | |
4823 | } | |
4824 | #endif /* DYNAMIC_SYSCALLS */ | |
4825 | ||
4826 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4827 | { |
c3f6f71d JM |
4828 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4829 | gdb_flush (gdb_stderr); | |
4830 | _exit (127); | |
c906108c | 4831 | } |
c3f6f71d JM |
4832 | #endif /* PRFS_STOPEXEC */ |
4833 | ||
4834 | /* FIXME: should this be done in the parent instead? */ | |
4835 | /* Turn off inherit on fork flag so that all grand-children | |
4836 | of gdb start with tracing flags cleared. */ | |
4837 | if (!proc_unset_inherit_on_fork (pi)) | |
4838 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4839 | ||
4840 | /* Turn off run on last close flag, so that the child process | |
4841 | cannot run away just because we close our handle on it. | |
4842 | We want it to wait for the parent to attach. */ | |
4843 | if (!proc_unset_run_on_last_close (pi)) | |
4844 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4845 | ||
19958708 | 4846 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
4847 | we have our own address space, and we're about to do an exec! */ |
4848 | /*destroy_procinfo (pi);*/ | |
c906108c | 4849 | } |
c906108c | 4850 | |
77382aee PA |
4851 | /* This function is called BEFORE gdb forks the inferior process. Its |
4852 | only real responsibility is to set things up for the fork, and tell | |
4853 | GDB which two functions to call after the fork (one for the parent, | |
4854 | and one for the child). | |
4855 | ||
4856 | This function does a complicated search for a unix shell program, | |
4857 | which it then uses to parse arguments and environment variables to | |
4858 | be sent to the child. I wonder whether this code could not be | |
4859 | abstracted out and shared with other unix targets such as | |
4860 | inf-ptrace? */ | |
c906108c SS |
4861 | |
4862 | static void | |
136d6dae VP |
4863 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4864 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4865 | { |
4866 | char *shell_file = getenv ("SHELL"); | |
4867 | char *tryname; | |
28439f5e PA |
4868 | int pid; |
4869 | ||
c906108c SS |
4870 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4871 | { | |
4872 | ||
4873 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4874 | just do this the normal way (via execlp, which operates by |
4875 | attempting an exec for each element of the PATH until it | |
4876 | finds one which succeeds), then there will be an exec for | |
4877 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4878 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4879 | for these failed execs with the ones for successful execs | |
4880 | (whether the exec has succeeded is stored at that time in the | |
4881 | carry bit or some such architecture-specific and | |
4882 | non-ABI-specified place). | |
4883 | ||
4884 | So I can't think of anything better than to search the PATH | |
4885 | now. This has several disadvantages: (1) There is a race | |
4886 | condition; if we find a file now and it is deleted before we | |
4887 | exec it, we lose, even if the deletion leaves a valid file | |
4888 | further down in the PATH, (2) there is no way to know exactly | |
4889 | what an executable (in the sense of "capable of being | |
4890 | exec'd") file is. Using access() loses because it may lose | |
4891 | if the caller is the superuser; failing to use it loses if | |
4892 | there are ACLs or some such. */ | |
c906108c SS |
4893 | |
4894 | char *p; | |
4895 | char *p1; | |
4896 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4897 | path is used from within GDB. */ |
c906108c SS |
4898 | char *path = getenv ("PATH"); |
4899 | int len; | |
4900 | struct stat statbuf; | |
4901 | ||
4902 | if (path == NULL) | |
4903 | path = "/bin:/usr/bin"; | |
4904 | ||
4905 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4906 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4907 | { |
4908 | p1 = strchr (p, ':'); | |
4909 | if (p1 != NULL) | |
4910 | len = p1 - p; | |
4911 | else | |
4912 | len = strlen (p); | |
4913 | strncpy (tryname, p, len); | |
4914 | tryname[len] = '\0'; | |
4915 | strcat (tryname, "/"); | |
4916 | strcat (tryname, shell_file); | |
4917 | if (access (tryname, X_OK) < 0) | |
4918 | continue; | |
4919 | if (stat (tryname, &statbuf) < 0) | |
4920 | continue; | |
4921 | if (!S_ISREG (statbuf.st_mode)) | |
4922 | /* We certainly need to reject directories. I'm not quite | |
4923 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4924 | that people want to exec() these things. */ | |
4925 | continue; | |
4926 | break; | |
4927 | } | |
4928 | if (p == NULL) | |
4929 | /* Not found. This must be an error rather than merely passing | |
4930 | the file to execlp(), because execlp() would try all the | |
4931 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4932 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4933 | __LINE__, shell_file); |
c906108c SS |
4934 | |
4935 | shell_file = tryname; | |
4936 | } | |
4937 | ||
28439f5e PA |
4938 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4939 | NULL, NULL, shell_file); | |
4940 | ||
4941 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4942 | } |
4943 | ||
4944 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4945 | |
27087a3d JB |
4946 | static void |
4947 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4948 | { | |
9185ddce | 4949 | #ifdef SYS_syssgi |
77382aee | 4950 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4951 | They should normally have been removed by now, but they may still |
4952 | be activated if the inferior doesn't use shared libraries, or if | |
4953 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4954 | See procfs_init_inferior() for more details. |
4955 | ||
4956 | Since these notifications are only ever enabled when we spawned | |
4957 | the inferior ourselves, there is nothing to do when the inferior | |
4958 | was created by attaching to an already running process, or when | |
4959 | debugging a core file. */ | |
4960 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4961 | return; | |
4962 | ||
9185ddce | 4963 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4964 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4965 | #endif |
c906108c SS |
4966 | } |
4967 | ||
77382aee | 4968 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4969 | |
c3f6f71d | 4970 | static int |
fba45db2 | 4971 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4972 | { |
39f77062 | 4973 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4974 | |
2689673f | 4975 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4976 | add_thread (gdb_threadid); |
c906108c | 4977 | |
c3f6f71d JM |
4978 | return 0; |
4979 | } | |
4980 | ||
77382aee PA |
4981 | /* Query all the threads that the target knows about, and give them |
4982 | back to GDB to add to its list. */ | |
c3f6f71d JM |
4983 | |
4984 | void | |
28439f5e | 4985 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4986 | { |
4987 | procinfo *pi; | |
4988 | ||
4989 | /* Find procinfo for main process */ | |
39f77062 | 4990 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4991 | proc_update_threads (pi); |
4992 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4993 | } |
4994 | ||
77382aee PA |
4995 | /* Return true if the thread is still 'alive'. This guy doesn't |
4996 | really seem to be doing his job. Got to investigate how to tell | |
4997 | when a thread is really gone. */ | |
c906108c | 4998 | |
c906108c | 4999 | static int |
28439f5e | 5000 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 5001 | { |
c3f6f71d JM |
5002 | int proc, thread; |
5003 | procinfo *pi; | |
c906108c | 5004 | |
39f77062 KB |
5005 | proc = PIDGET (ptid); |
5006 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5007 | /* If I don't know it, it ain't alive! */ |
5008 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5009 | return 0; | |
5010 | ||
5011 | /* If I can't get its status, it ain't alive! | |
5012 | What's more, I need to forget about it! */ | |
5013 | if (!proc_get_status (pi)) | |
5014 | { | |
5015 | destroy_procinfo (pi); | |
5016 | return 0; | |
5017 | } | |
77382aee PA |
5018 | /* I couldn't have got its status if it weren't alive, so it's |
5019 | alive. */ | |
c3f6f71d | 5020 | return 1; |
c906108c | 5021 | } |
c3f6f71d | 5022 | |
77382aee PA |
5023 | /* Convert PTID to a string. Returns the string in a static |
5024 | buffer. */ | |
c3f6f71d JM |
5025 | |
5026 | char * | |
117de6a9 | 5027 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5028 | { |
5029 | static char buf[80]; | |
c3f6f71d | 5030 | |
5240ceac MK |
5031 | if (TIDGET (ptid) == 0) |
5032 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5033 | else |
21749010 | 5034 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5035 | |
5036 | return buf; | |
c3f6f71d JM |
5037 | } |
5038 | ||
77382aee | 5039 | /* Insert a watchpoint. */ |
c3f6f71d | 5040 | |
19958708 | 5041 | int |
39f77062 | 5042 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 5043 | int after) |
c906108c | 5044 | { |
c3f6f71d | 5045 | #ifndef UNIXWARE |
37de36c6 | 5046 | #ifndef AIX5 |
c3f6f71d | 5047 | int pflags = 0; |
19958708 | 5048 | procinfo *pi; |
c3f6f71d | 5049 | |
19958708 | 5050 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5051 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5052 | |
5053 | /* Translate from GDB's flags to /proc's */ | |
5054 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5055 | { |
c3f6f71d JM |
5056 | switch (rwflag) { /* FIXME: need an enum! */ |
5057 | case hw_write: /* default watchpoint (write) */ | |
5058 | pflags = WRITE_WATCHFLAG; | |
5059 | break; | |
5060 | case hw_read: /* read watchpoint */ | |
5061 | pflags = READ_WATCHFLAG; | |
5062 | break; | |
5063 | case hw_access: /* access watchpoint */ | |
5064 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5065 | break; | |
5066 | case hw_execute: /* execution HW breakpoint */ | |
5067 | pflags = EXEC_WATCHFLAG; | |
5068 | break; | |
5069 | default: /* Something weird. Return error. */ | |
c906108c | 5070 | return -1; |
c3f6f71d JM |
5071 | } |
5072 | if (after) /* Stop after r/w access is completed. */ | |
5073 | pflags |= AFTER_WATCHFLAG; | |
5074 | } | |
5075 | ||
5076 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5077 | { | |
5078 | if (errno == E2BIG) /* Typical error for no resources */ | |
5079 | return -1; /* fail */ | |
5080 | /* GDB may try to remove the same watchpoint twice. | |
5081 | If a remove request returns no match, don't error. */ | |
c906108c | 5082 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5083 | return 0; /* ignore */ |
5084 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5085 | } |
37de36c6 KB |
5086 | #endif /* AIX5 */ |
5087 | #endif /* UNIXWARE */ | |
c906108c SS |
5088 | return 0; |
5089 | } | |
5090 | ||
1e03ad20 KB |
5091 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5092 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5093 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5094 | far. | |
19958708 | 5095 | |
1e03ad20 KB |
5096 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5097 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5098 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5099 | |
5100 | static int | |
5101 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5102 | { | |
1e03ad20 KB |
5103 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5104 | and target pointers must be of the same size. If they are not, | |
5105 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5106 | fact that proc_set_watchpoint() calls |
5107 | procfs_address_to_host_pointer(); a close inspection of | |
5108 | procfs_address_to_host_pointer will reveal that an internal error | |
5109 | will be generated when the host and target pointer sizes are | |
5110 | different. */ | |
4e906f53 | 5111 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
f4a14ae6 | 5112 | |
4e906f53 | 5113 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
5114 | return 0; |
5115 | ||
5116 | /* Other tests here??? */ | |
5117 | ||
5118 | return 1; | |
1e03ad20 KB |
5119 | } |
5120 | ||
77382aee PA |
5121 | /* Returns non-zero if process is stopped on a hardware watchpoint |
5122 | fault, else returns zero. */ | |
c3f6f71d | 5123 | |
25513619 PA |
5124 | static int |
5125 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5126 | { |
c3f6f71d | 5127 | procinfo *pi; |
c906108c | 5128 | |
25513619 | 5129 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 5130 | |
c3f6f71d | 5131 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5132 | { |
c3f6f71d | 5133 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5134 | { |
c906108c | 5135 | #ifdef FLTWATCH |
c3f6f71d JM |
5136 | if (proc_what (pi) == FLTWATCH) |
5137 | return 1; | |
c906108c SS |
5138 | #endif |
5139 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5140 | if (proc_what (pi) == FLTKWATCH) |
5141 | return 1; | |
c906108c | 5142 | #endif |
c3f6f71d | 5143 | } |
c906108c SS |
5144 | } |
5145 | return 0; | |
5146 | } | |
c906108c | 5147 | |
77382aee PA |
5148 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
5149 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
5150 | address. This function is only called if | |
5151 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
5152 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
5153 | |
5154 | static int | |
5155 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
5156 | { | |
5157 | procinfo *pi; | |
5158 | ||
5159 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5160 | return proc_watchpoint_address (pi, addr); | |
5161 | } | |
5162 | ||
25513619 | 5163 | static int |
0cf6dd15 TJB |
5164 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
5165 | struct expression *cond) | |
25513619 | 5166 | { |
d92524f1 | 5167 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5168 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5169 | { |
5170 | /* When a hardware watchpoint fires off the PC will be left at | |
5171 | the instruction following the one which caused the | |
5172 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5173 | the watchpoint. */ | |
5174 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5175 | } | |
5176 | else | |
5177 | { | |
5178 | /* When a hardware watchpoint fires off the PC will be left at | |
5179 | the instruction which caused the watchpoint. It will be | |
5180 | necessary for GDB to step over the watchpoint. */ | |
5181 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5182 | } | |
5183 | } | |
5184 | ||
5185 | static int | |
0cf6dd15 TJB |
5186 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
5187 | struct expression *cond) | |
25513619 PA |
5188 | { |
5189 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5190 | } | |
5191 | ||
5192 | static int | |
5193 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5194 | { | |
5195 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5196 | system can support "thousands" of hardware watchpoints, but gives | |
5197 | no method for finding out how many; It doesn't say anything about | |
5198 | the allowed size for the watched area either. So we just tell | |
5199 | GDB 'yes'. */ | |
5200 | return 1; | |
5201 | } | |
5202 | ||
5203 | void | |
5204 | procfs_use_watchpoints (struct target_ops *t) | |
5205 | { | |
5206 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5207 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5208 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5209 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5210 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 5211 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
5212 | } |
5213 | ||
77382aee PA |
5214 | /* Memory Mappings Functions: */ |
5215 | ||
5216 | /* Call a callback function once for each mapping, passing it the | |
5217 | mapping, an optional secondary callback function, and some optional | |
5218 | opaque data. Quit and return the first non-zero value returned | |
5219 | from the callback. | |
5220 | ||
5221 | PI is the procinfo struct for the process to be mapped. FUNC is | |
5222 | the callback function to be called by this iterator. DATA is the | |
5223 | optional opaque data to be passed to the callback function. | |
5224 | CHILD_FUNC is the optional secondary function pointer to be passed | |
5225 | to the child function. Returns the first non-zero return value | |
5226 | from the callback function, or zero. */ | |
831e682e MS |
5227 | |
5228 | static int | |
e9ef4f39 JB |
5229 | iterate_over_mappings (procinfo *pi, |
5230 | iterate_over_mappings_cb_ftype *child_func, | |
5231 | void *data, | |
19958708 | 5232 | int (*func) (struct prmap *map, |
e9ef4f39 | 5233 | iterate_over_mappings_cb_ftype *child_func, |
831e682e MS |
5234 | void *data)) |
5235 | { | |
5236 | char pathname[MAX_PROC_NAME_SIZE]; | |
5237 | struct prmap *prmaps; | |
5238 | struct prmap *prmap; | |
5239 | int funcstat; | |
5240 | int map_fd; | |
5241 | int nmap; | |
5242 | #ifdef NEW_PROC_API | |
5243 | struct stat sbuf; | |
5244 | #endif | |
5245 | ||
19958708 | 5246 | /* Get the number of mappings, allocate space, |
831e682e MS |
5247 | and read the mappings into prmaps. */ |
5248 | #ifdef NEW_PROC_API | |
5249 | /* Open map fd. */ | |
5250 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5251 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5252 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5253 | ||
5254 | /* Make sure it gets closed again. */ | |
5255 | make_cleanup_close (map_fd); | |
5256 | ||
19958708 | 5257 | /* Use stat to determine the file size, and compute |
831e682e MS |
5258 | the number of prmap_t objects it contains. */ |
5259 | if (fstat (map_fd, &sbuf) != 0) | |
5260 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5261 | ||
5262 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5263 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5264 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5265 | != (nmap * sizeof (*prmaps))) | |
5266 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5267 | #else | |
5268 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5269 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5270 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5271 | ||
5272 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5273 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5274 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5275 | #endif | |
5276 | ||
5277 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5278 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5279 | return funcstat; | |
5280 | ||
5281 | return 0; | |
5282 | } | |
5283 | ||
77382aee PA |
5284 | /* Implements the to_find_memory_regions method. Calls an external |
5285 | function for each memory region. The external function will have | |
5286 | the signature: | |
5287 | ||
5288 | int callback (CORE_ADDR vaddr, | |
5289 | unsigned long size, | |
5290 | int read, int write, int execute, | |
5291 | void *data); | |
5292 | ||
5293 | Returns the integer value returned by the callback. */ | |
be4d1333 MS |
5294 | |
5295 | static int | |
19958708 RM |
5296 | find_memory_regions_callback (struct prmap *map, |
5297 | int (*func) (CORE_ADDR, | |
5298 | unsigned long, | |
5299 | int, int, int, | |
be4d1333 MS |
5300 | void *), |
5301 | void *data) | |
5302 | { | |
bf75638e | 5303 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5304 | map->pr_size, |
be4d1333 MS |
5305 | (map->pr_mflags & MA_READ) != 0, |
5306 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5307 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5308 | data); |
5309 | } | |
5310 | ||
77382aee PA |
5311 | /* External interface. Calls a callback function once for each |
5312 | mapped memory region in the child process, passing as arguments: | |
5313 | ||
5314 | CORE_ADDR virtual_address, | |
5315 | unsigned long size, | |
5316 | int read, TRUE if region is readable by the child | |
5317 | int write, TRUE if region is writable by the child | |
5318 | int execute TRUE if region is executable by the child. | |
5319 | ||
5320 | Stops iterating and returns the first non-zero value returned by | |
5321 | the callback. */ | |
be4d1333 MS |
5322 | |
5323 | static int | |
19958708 RM |
5324 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5325 | unsigned long, | |
5326 | int, int, int, | |
5327 | void *), | |
be4d1333 MS |
5328 | void *data) |
5329 | { | |
5330 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5331 | ||
19958708 | 5332 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5333 | find_memory_regions_callback); |
5334 | } | |
5335 | ||
77382aee | 5336 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5337 | |
388faa48 | 5338 | static char * |
5ae5f592 | 5339 | mappingflags (long flags) |
388faa48 MS |
5340 | { |
5341 | static char asciiflags[8]; | |
5342 | ||
5343 | strcpy (asciiflags, "-------"); | |
5344 | #if defined (MA_PHYS) | |
5345 | if (flags & MA_PHYS) | |
5346 | asciiflags[0] = 'd'; | |
5347 | #endif | |
5348 | if (flags & MA_STACK) | |
5349 | asciiflags[1] = 's'; | |
5350 | if (flags & MA_BREAK) | |
5351 | asciiflags[2] = 'b'; | |
5352 | if (flags & MA_SHARED) | |
5353 | asciiflags[3] = 's'; | |
5354 | if (flags & MA_READ) | |
5355 | asciiflags[4] = 'r'; | |
5356 | if (flags & MA_WRITE) | |
5357 | asciiflags[5] = 'w'; | |
5358 | if (flags & MA_EXEC) | |
5359 | asciiflags[6] = 'x'; | |
5360 | return (asciiflags); | |
5361 | } | |
5362 | ||
77382aee PA |
5363 | /* Callback function, does the actual work for 'info proc |
5364 | mappings'. */ | |
831e682e | 5365 | |
831e682e | 5366 | static int |
e9ef4f39 JB |
5367 | info_mappings_callback (struct prmap *map, |
5368 | iterate_over_mappings_cb_ftype *ignore, | |
5369 | void *unused) | |
831e682e | 5370 | { |
0b62613e | 5371 | unsigned int pr_off; |
831e682e | 5372 | |
831e682e | 5373 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5374 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5375 | #else |
0b62613e | 5376 | pr_off = map->pr_off; |
831e682e | 5377 | #endif |
0b62613e | 5378 | |
a97b0ac8 | 5379 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5380 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5381 | (unsigned long) map->pr_vaddr, |
5382 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5383 | (unsigned long) map->pr_size, |
0b62613e PA |
5384 | pr_off, |
5385 | mappingflags (map->pr_mflags)); | |
5386 | else | |
f6a96b83 | 5387 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5388 | (unsigned long) map->pr_vaddr, |
5389 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5390 | (unsigned long) map->pr_size, |
0b62613e PA |
5391 | pr_off, |
5392 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5393 | |
5394 | return 0; | |
5395 | } | |
5396 | ||
77382aee | 5397 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5398 | |
5399 | static void | |
5400 | info_proc_mappings (procinfo *pi, int summary) | |
5401 | { | |
388faa48 MS |
5402 | if (summary) |
5403 | return; /* No output for summary mode. */ | |
5404 | ||
a3f17187 | 5405 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5406 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5407 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5408 | "Start Addr", | |
5409 | " End Addr", | |
5410 | " Size", | |
5411 | " Offset", | |
5412 | "Flags"); | |
5413 | else | |
5414 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5415 | "Start Addr", | |
5416 | " End Addr", | |
5417 | " Size", | |
5418 | " Offset", | |
5419 | "Flags"); | |
388faa48 | 5420 | |
831e682e | 5421 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5422 | printf_filtered ("\n"); |
5423 | } | |
5424 | ||
77382aee | 5425 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5426 | |
5427 | static void | |
fba45db2 | 5428 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5429 | { |
c3f6f71d | 5430 | struct cleanup *old_chain; |
388faa48 MS |
5431 | procinfo *process = NULL; |
5432 | procinfo *thread = NULL; | |
5433 | char **argv = NULL; | |
5434 | char *tmp = NULL; | |
5435 | int pid = 0; | |
5436 | int tid = 0; | |
5437 | int mappings = 0; | |
c906108c | 5438 | |
c3f6f71d JM |
5439 | old_chain = make_cleanup (null_cleanup, 0); |
5440 | if (args) | |
0fda6bd2 | 5441 | { |
d1a41061 PP |
5442 | argv = gdb_buildargv (args); |
5443 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5444 | } |
c3f6f71d JM |
5445 | while (argv != NULL && *argv != NULL) |
5446 | { | |
5447 | if (isdigit (argv[0][0])) | |
5448 | { | |
5449 | pid = strtoul (argv[0], &tmp, 10); | |
5450 | if (*tmp == '/') | |
5451 | tid = strtoul (++tmp, NULL, 10); | |
5452 | } | |
5453 | else if (argv[0][0] == '/') | |
5454 | { | |
5455 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5456 | } | |
388faa48 MS |
5457 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5458 | { | |
5459 | mappings = 1; | |
5460 | } | |
c3f6f71d JM |
5461 | else |
5462 | { | |
5463 | /* [...] */ | |
5464 | } | |
5465 | argv++; | |
5466 | } | |
5467 | if (pid == 0) | |
39f77062 | 5468 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5469 | if (pid == 0) |
8a3fe4f8 | 5470 | error (_("No current process: you must name one.")); |
c3f6f71d | 5471 | else |
c906108c | 5472 | { |
c3f6f71d JM |
5473 | /* Have pid, will travel. |
5474 | First see if it's a process we're already debugging. */ | |
5475 | process = find_procinfo (pid, 0); | |
5476 | if (process == NULL) | |
5477 | { | |
19958708 | 5478 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5479 | remember to close it again when finished. */ |
5480 | process = create_procinfo (pid, 0); | |
004527cb | 5481 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5482 | if (!open_procinfo_files (process, FD_CTL)) |
5483 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5484 | } | |
c906108c | 5485 | } |
c3f6f71d JM |
5486 | if (tid != 0) |
5487 | thread = create_procinfo (pid, tid); | |
5488 | ||
5489 | if (process) | |
5490 | { | |
a3f17187 | 5491 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5492 | proc_prettyprint_flags (proc_flags (process), 1); |
5493 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5494 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5495 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5496 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5497 | proc_get_nthreads (process)); |
5498 | } | |
5499 | if (thread) | |
5500 | { | |
a3f17187 | 5501 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5502 | proc_prettyprint_flags (proc_flags (thread), 1); |
5503 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5504 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5505 | } | |
5506 | ||
388faa48 MS |
5507 | if (mappings) |
5508 | { | |
5509 | info_proc_mappings (process, 0); | |
5510 | } | |
5511 | ||
c3f6f71d | 5512 | do_cleanups (old_chain); |
c906108c SS |
5513 | } |
5514 | ||
9185ddce JB |
5515 | /* Modify the status of the system call identified by SYSCALLNUM in |
5516 | the set of syscalls that are currently traced/debugged. | |
5517 | ||
5518 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5519 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5520 | ||
5521 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5522 | will be disabled. */ | |
5523 | ||
5524 | static void | |
5525 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5526 | int mode, int from_tty) |
9185ddce JB |
5527 | { |
5528 | sysset_t *sysset; | |
77382aee | 5529 | |
9185ddce JB |
5530 | if (entry_or_exit == PR_SYSENTRY) |
5531 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5532 | else | |
5533 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5534 | ||
5535 | if (sysset == NULL) | |
5536 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5537 | ||
5538 | if (mode == FLAG_SET) | |
5539 | gdb_praddsysset (sysset, syscallnum); | |
5540 | else | |
5541 | gdb_prdelsysset (sysset, syscallnum); | |
5542 | ||
5543 | if (entry_or_exit == PR_SYSENTRY) | |
5544 | { | |
5545 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5546 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5547 | } |
5548 | else | |
5549 | { | |
5550 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5551 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5552 | } |
5553 | } | |
5554 | ||
c3f6f71d | 5555 | static void |
fba45db2 | 5556 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5557 | { |
c3f6f71d | 5558 | procinfo *pi; |
c906108c | 5559 | |
39f77062 | 5560 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5561 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5562 | |
c3f6f71d | 5563 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5564 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5565 | |
39f77062 | 5566 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5567 | if (isdigit (args[0])) |
5568 | { | |
9185ddce | 5569 | const int syscallnum = atoi (args); |
c906108c | 5570 | |
9185ddce | 5571 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5572 | } |
5573 | } | |
5574 | ||
19958708 | 5575 | static void |
fba45db2 | 5576 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5577 | { |
c3f6f71d JM |
5578 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5579 | } | |
c906108c | 5580 | |
19958708 | 5581 | static void |
fba45db2 | 5582 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5583 | { |
5584 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5585 | } |
c906108c | 5586 | |
19958708 | 5587 | static void |
fba45db2 | 5588 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5589 | { |
5590 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5591 | } | |
5592 | ||
19958708 | 5593 | static void |
fba45db2 | 5594 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5595 | { |
c3f6f71d JM |
5596 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5597 | } | |
c906108c | 5598 | |
c906108c | 5599 | |
c906108c | 5600 | void |
fba45db2 | 5601 | _initialize_procfs (void) |
c906108c | 5602 | { |
27087a3d JB |
5603 | observer_attach_inferior_created (procfs_inferior_created); |
5604 | ||
1bedd215 AC |
5605 | add_info ("proc", info_proc_cmd, _("\ |
5606 | Show /proc process information about any running process.\n\ | |
388faa48 | 5607 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 5608 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 5609 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5610 | _("Give a trace of entries into the syscall.")); |
19958708 | 5611 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5612 | _("Give a trace of exits from the syscall.")); |
19958708 | 5613 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5614 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5615 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5616 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5617 | } |
5618 | ||
5619 | /* =================== END, GDB "MODULE" =================== */ | |
5620 | ||
5621 | ||
5622 | ||
77382aee PA |
5623 | /* miscellaneous stubs: */ |
5624 | ||
5625 | /* The following satisfy a few random symbols mostly created by the | |
5626 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5627 | |
77382aee PA |
5628 | /* Return a pid for which we guarantee we will be able to find a |
5629 | 'live' procinfo. */ | |
c3f6f71d | 5630 | |
39f77062 | 5631 | ptid_t |
fba45db2 | 5632 | procfs_first_available (void) |
c3f6f71d | 5633 | { |
39f77062 | 5634 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5635 | } |
be4d1333 MS |
5636 | |
5637 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5638 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5639 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5640 | |
5641 | static char * | |
19958708 | 5642 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
5643 | char *note_data, int *note_size, |
5644 | enum target_signal stop_signal) | |
be4d1333 | 5645 | { |
594f7785 | 5646 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5647 | gdb_gregset_t gregs; |
5648 | gdb_fpregset_t fpregs; | |
5649 | unsigned long merged_pid; | |
75125405 | 5650 | struct cleanup *old_chain; |
be4d1333 MS |
5651 | |
5652 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5653 | ||
75125405 DJ |
5654 | /* This part is the old method for fetching registers. |
5655 | It should be replaced by the newer one using regsets | |
5656 | once it is implemented in this platform: | |
5657 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ | |
5658 | ||
5659 | old_chain = save_inferior_ptid (); | |
5660 | inferior_ptid = ptid; | |
5661 | target_fetch_registers (regcache, -1); | |
5662 | ||
594f7785 | 5663 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5664 | #if defined (NEW_PROC_API) |
65554fef MS |
5665 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5666 | note_data, | |
5667 | note_size, | |
19958708 | 5668 | merged_pid, |
65554fef MS |
5669 | stop_signal, |
5670 | &gregs); | |
5671 | #else | |
be4d1333 | 5672 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5673 | note_data, |
5674 | note_size, | |
19958708 | 5675 | merged_pid, |
be4d1333 | 5676 | stop_signal, |
65554fef MS |
5677 | &gregs); |
5678 | #endif | |
594f7785 | 5679 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5680 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5681 | note_data, | |
5682 | note_size, | |
5683 | &fpregs, | |
5684 | sizeof (fpregs)); | |
75125405 DJ |
5685 | |
5686 | do_cleanups (old_chain); | |
5687 | ||
be4d1333 MS |
5688 | return note_data; |
5689 | } | |
5690 | ||
5691 | struct procfs_corefile_thread_data { | |
5692 | bfd *obfd; | |
5693 | char *note_data; | |
5694 | int *note_size; | |
2020b7ab | 5695 | enum target_signal stop_signal; |
be4d1333 MS |
5696 | }; |
5697 | ||
5698 | static int | |
65554fef | 5699 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5700 | { |
5701 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5702 | |
2689673f | 5703 | if (pi != NULL) |
be4d1333 | 5704 | { |
75125405 | 5705 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
f4a14ae6 | 5706 | |
75125405 | 5707 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5708 | args->note_data, |
2020b7ab PA |
5709 | args->note_size, |
5710 | args->stop_signal); | |
be4d1333 MS |
5711 | } |
5712 | return 0; | |
5713 | } | |
5714 | ||
a223f1e7 JB |
5715 | static int |
5716 | find_signalled_thread (struct thread_info *info, void *data) | |
5717 | { | |
5718 | if (info->stop_signal != TARGET_SIGNAL_0 | |
5719 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
5720 | return 1; | |
5721 | ||
5722 | return 0; | |
5723 | } | |
5724 | ||
5725 | static enum target_signal | |
5726 | find_stop_signal (void) | |
5727 | { | |
5728 | struct thread_info *info = | |
5729 | iterate_over_threads (find_signalled_thread, NULL); | |
5730 | ||
5731 | if (info) | |
5732 | return info->stop_signal; | |
5733 | else | |
5734 | return TARGET_SIGNAL_0; | |
5735 | } | |
5736 | ||
be4d1333 MS |
5737 | static char * |
5738 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5739 | { | |
5740 | struct cleanup *old_chain; | |
5741 | gdb_gregset_t gregs; | |
5742 | gdb_fpregset_t fpregs; | |
5743 | char fname[16] = {'\0'}; | |
5744 | char psargs[80] = {'\0'}; | |
5745 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5746 | char *note_data = NULL; | |
6dbdc4a3 | 5747 | char *inf_args; |
be4d1333 | 5748 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5749 | gdb_byte *auxv; |
4e73f23d | 5750 | int auxv_len; |
651c8d2d | 5751 | enum target_signal stop_signal; |
be4d1333 MS |
5752 | |
5753 | if (get_exec_file (0)) | |
5754 | { | |
5755 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 5756 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 5757 | sizeof (psargs)); |
6dbdc4a3 MS |
5758 | |
5759 | inf_args = get_inferior_args (); | |
5760 | if (inf_args && *inf_args && | |
5761 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5762 | { |
19958708 | 5763 | strncat (psargs, " ", |
be4d1333 | 5764 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5765 | strncat (psargs, inf_args, |
be4d1333 MS |
5766 | sizeof (psargs) - strlen (psargs)); |
5767 | } | |
5768 | } | |
5769 | ||
19958708 RM |
5770 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5771 | note_data, | |
5772 | note_size, | |
5773 | fname, | |
be4d1333 MS |
5774 | psargs); |
5775 | ||
651c8d2d PA |
5776 | stop_signal = find_stop_signal (); |
5777 | ||
8903eff6 | 5778 | #ifdef UNIXWARE |
594f7785 | 5779 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5780 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5781 | PIDGET (inferior_ptid), | |
65554fef MS |
5782 | stop_signal, &gregs); |
5783 | #endif | |
5784 | ||
be4d1333 MS |
5785 | thread_args.obfd = obfd; |
5786 | thread_args.note_data = note_data; | |
5787 | thread_args.note_size = note_size; | |
651c8d2d | 5788 | thread_args.stop_signal = stop_signal; |
65554fef MS |
5789 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5790 | ||
2689673f PA |
5791 | /* There should be always at least one thread. */ |
5792 | gdb_assert (thread_args.note_data != note_data); | |
5793 | note_data = thread_args.note_data; | |
be4d1333 | 5794 | |
13547ab6 DJ |
5795 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5796 | NULL, &auxv); | |
4e73f23d RM |
5797 | if (auxv_len > 0) |
5798 | { | |
5799 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5800 | "CORE", NT_AUXV, auxv, auxv_len); | |
5801 | xfree (auxv); | |
5802 | } | |
5803 | ||
be4d1333 MS |
5804 | make_cleanup (xfree, note_data); |
5805 | return note_data; | |
5806 | } | |
65554fef MS |
5807 | #else /* !(Solaris or Unixware) */ |
5808 | static char * | |
5809 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5810 | { | |
8a3fe4f8 | 5811 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5812 | return NULL; /* lint */ |
5813 | } | |
5814 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5815 | /* =================== END GCORE .NOTE "MODULE" =================== */ |