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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); | |
862 | ret = xmalloc (size); | |
863 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
864 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
865 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
866 | #endif |
867 | return ret; | |
868 | } | |
869 | ||
870 | #ifdef DYNAMIC_SYSCALLS | |
871 | ||
77382aee | 872 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
873 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
874 | with the names. (Certain numbers may be skipped in which case the | |
875 | names for these numbers will be left as NULL.) */ | |
876 | ||
877 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
878 | #define MAX_SYSCALLS 65536 | |
879 | ||
880 | static void | |
881 | load_syscalls (procinfo *pi) | |
882 | { | |
883 | char pathname[MAX_PROC_NAME_SIZE]; | |
884 | int sysent_fd; | |
885 | prsysent_t header; | |
886 | prsyscall_t *syscalls; | |
887 | int i, size, maxcall; | |
888 | ||
889 | pi->num_syscalls = 0; | |
890 | pi->syscall_names = 0; | |
891 | ||
77382aee | 892 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 893 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 894 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
895 | if (sysent_fd < 0) |
896 | { | |
8a3fe4f8 | 897 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
898 | } |
899 | ||
900 | size = sizeof header - sizeof (prsyscall_t); | |
901 | if (read (sysent_fd, &header, size) != size) | |
902 | { | |
8a3fe4f8 | 903 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
904 | } |
905 | ||
906 | if (header.pr_nsyscalls == 0) | |
907 | { | |
77382aee PA |
908 | error (_("\ |
909 | load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); | |
37de36c6 KB |
910 | } |
911 | ||
912 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
913 | syscalls = xmalloc (size); | |
914 | ||
915 | if (read (sysent_fd, syscalls, size) != size) | |
916 | { | |
917 | xfree (syscalls); | |
8a3fe4f8 | 918 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
919 | } |
920 | ||
921 | /* Find maximum syscall number. This may not be the same as | |
922 | pr_nsyscalls since that value refers to the number of entries | |
923 | in the table. (Also, the docs indicate that some system | |
924 | call numbers may be skipped.) */ | |
925 | ||
926 | maxcall = syscalls[0].pr_number; | |
927 | ||
928 | for (i = 1; i < header.pr_nsyscalls; i++) | |
929 | if (syscalls[i].pr_number > maxcall | |
77382aee | 930 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
931 | && syscalls[i].pr_number < MAX_SYSCALLS) |
932 | maxcall = syscalls[i].pr_number; | |
933 | ||
934 | pi->num_syscalls = maxcall+1; | |
935 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
936 | ||
937 | for (i = 0; i < pi->num_syscalls; i++) | |
938 | pi->syscall_names[i] = NULL; | |
939 | ||
77382aee | 940 | /* Read the syscall names in. */ |
37de36c6 KB |
941 | for (i = 0; i < header.pr_nsyscalls; i++) |
942 | { | |
943 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
944 | int nread; | |
945 | int callnum; | |
946 | ||
947 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 948 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
949 | || syscalls[i].pr_nameoff <= 0 |
950 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 951 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
952 | continue; |
953 | ||
954 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
955 | if (nread <= 0) | |
956 | continue; | |
957 | ||
958 | callnum = syscalls[i].pr_number; | |
959 | ||
960 | if (pi->syscall_names[callnum] != NULL) | |
961 | { | |
962 | /* FIXME: Generate warning */ | |
963 | continue; | |
964 | } | |
965 | ||
966 | namebuf[nread-1] = '\0'; | |
967 | size = strlen (namebuf) + 1; | |
968 | pi->syscall_names[callnum] = xmalloc (size); | |
969 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
970 | pi->syscall_names[callnum][size-1] = '\0'; | |
971 | } | |
19958708 | 972 | |
37de36c6 KB |
973 | close (sysent_fd); |
974 | xfree (syscalls); | |
975 | } | |
976 | ||
77382aee | 977 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
978 | structure. */ |
979 | ||
980 | static void | |
981 | free_syscalls (procinfo *pi) | |
982 | { | |
983 | if (pi->syscall_names) | |
984 | { | |
985 | int i; | |
986 | ||
987 | for (i = 0; i < pi->num_syscalls; i++) | |
988 | if (pi->syscall_names[i] != NULL) | |
989 | xfree (pi->syscall_names[i]); | |
990 | ||
991 | xfree (pi->syscall_names); | |
992 | pi->syscall_names = 0; | |
993 | } | |
994 | } | |
995 | ||
77382aee | 996 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 997 | If no match is found, return -1. */ |
19958708 | 998 | |
37de36c6 KB |
999 | static int |
1000 | find_syscall (procinfo *pi, char *name) | |
1001 | { | |
1002 | int i; | |
1003 | for (i = 0; i < pi->num_syscalls; i++) | |
1004 | { | |
1005 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1006 | return i; | |
1007 | } | |
1008 | return -1; | |
1009 | } | |
1010 | #endif | |
1011 | ||
c3f6f71d | 1012 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1013 | |
c3f6f71d | 1014 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1015 | |
77382aee PA |
1016 | /* This "module" is the interface layer between the /proc system API |
1017 | and the gdb target vector functions. This layer consists of access | |
1018 | functions that encapsulate each of the basic operations that we | |
1019 | need to use from the /proc API. | |
1020 | ||
1021 | The main motivation for this layer is to hide the fact that there | |
1022 | are two very different implementations of the /proc API. Rather | |
1023 | than have a bunch of #ifdefs all thru the gdb target vector | |
1024 | functions, we do our best to hide them all in here. */ | |
c906108c | 1025 | |
a14ed312 KB |
1026 | int proc_get_status (procinfo * pi); |
1027 | long proc_flags (procinfo * pi); | |
1028 | int proc_why (procinfo * pi); | |
1029 | int proc_what (procinfo * pi); | |
1030 | int proc_set_run_on_last_close (procinfo * pi); | |
1031 | int proc_unset_run_on_last_close (procinfo * pi); | |
1032 | int proc_set_inherit_on_fork (procinfo * pi); | |
1033 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1034 | int proc_set_async (procinfo * pi); | |
1035 | int proc_unset_async (procinfo * pi); | |
1036 | int proc_stop_process (procinfo * pi); | |
1037 | int proc_trace_signal (procinfo * pi, int signo); | |
1038 | int proc_ignore_signal (procinfo * pi, int signo); | |
1039 | int proc_clear_current_fault (procinfo * pi); | |
1040 | int proc_set_current_signal (procinfo * pi, int signo); | |
1041 | int proc_clear_current_signal (procinfo * pi); | |
1042 | int proc_set_gregs (procinfo * pi); | |
1043 | int proc_set_fpregs (procinfo * pi); | |
1044 | int proc_wait_for_stop (procinfo * pi); | |
1045 | int proc_run_process (procinfo * pi, int step, int signo); | |
1046 | int proc_kill (procinfo * pi, int signo); | |
1047 | int proc_parent_pid (procinfo * pi); | |
1048 | int proc_get_nthreads (procinfo * pi); | |
1049 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1050 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1051 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1052 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1053 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1054 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1055 | |
1056 | int proc_update_threads (procinfo * pi); | |
1057 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1058 | int (*func) (procinfo *, procinfo *, void *), |
1059 | void *ptr); | |
a14ed312 KB |
1060 | |
1061 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1062 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1063 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1064 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1065 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1066 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1067 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1068 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1069 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1070 | |
1071 | void proc_warn (procinfo * pi, char *func, int line); | |
1072 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1073 | |
c3f6f71d | 1074 | void |
fba45db2 | 1075 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1076 | { |
1077 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1078 | print_sys_errmsg (errmsg, errno); | |
1079 | } | |
c906108c | 1080 | |
c3f6f71d | 1081 | void |
fba45db2 | 1082 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1083 | { |
1084 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1085 | perror_with_name (errmsg); | |
1086 | } | |
c906108c | 1087 | |
77382aee PA |
1088 | /* Updates the status struct in the procinfo. There is a 'valid' |
1089 | flag, to let other functions know when this function needs to be | |
1090 | called (so the status is only read when it is needed). The status | |
1091 | file descriptor is also only opened when it is needed. Returns | |
1092 | non-zero for success, zero for failure. */ | |
c906108c | 1093 | |
c3f6f71d | 1094 | int |
fba45db2 | 1095 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1096 | { |
1097 | /* Status file descriptor is opened "lazily" */ | |
1098 | if (pi->status_fd == 0 && | |
1099 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1100 | { | |
1101 | pi->status_valid = 0; | |
1102 | return 0; | |
1103 | } | |
c906108c | 1104 | |
c3f6f71d JM |
1105 | #ifdef NEW_PROC_API |
1106 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1107 | pi->status_valid = 0; /* fail */ | |
1108 | else | |
1109 | { | |
19958708 | 1110 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1111 | depending on whether this is a main process or an LWP. */ |
1112 | if (pi->tid) | |
19958708 RM |
1113 | pi->status_valid = (read (pi->status_fd, |
1114 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1115 | sizeof (lwpstatus_t)) |
1116 | == sizeof (lwpstatus_t)); | |
1117 | else | |
1118 | { | |
19958708 | 1119 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1120 | (char *) &pi->prstatus, |
1121 | sizeof (gdb_prstatus_t)) | |
1122 | == sizeof (gdb_prstatus_t)); | |
1123 | #if 0 /*def UNIXWARE*/ | |
1124 | if (pi->status_valid && | |
1125 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1126 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1127 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1128 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1129 | (char *) &pi->prstatus, |
1130 | sizeof (gdb_prstatus_t)) | |
1131 | == sizeof (gdb_prstatus_t)); | |
1132 | #endif /* UNIXWARE */ | |
1133 | } | |
1134 | } | |
1135 | #else /* ioctl method */ | |
1136 | #ifdef PIOCTSTATUS /* osf */ | |
1137 | if (pi->tid == 0) /* main process */ | |
1138 | { | |
1139 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1140 | pi->status_valid = |
c3f6f71d JM |
1141 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1142 | } | |
1143 | else | |
1144 | { | |
1145 | int win; | |
1146 | struct { | |
1147 | long pr_count; | |
1148 | tid_t pr_error_thread; | |
1149 | struct prstatus status; | |
1150 | } thread_status; | |
1151 | ||
1152 | thread_status.pr_count = 1; | |
1153 | thread_status.status.pr_tid = pi->tid; | |
1154 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1155 | if (win) | |
1156 | { | |
19958708 | 1157 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1158 | sizeof (pi->prstatus)); |
1159 | pi->status_valid = 1; | |
1160 | } | |
1161 | } | |
1162 | #else | |
77382aee | 1163 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1164 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1165 | #endif | |
1166 | #endif | |
c906108c | 1167 | |
c3f6f71d JM |
1168 | if (pi->status_valid) |
1169 | { | |
19958708 | 1170 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1171 | proc_why (pi), |
19958708 | 1172 | proc_what (pi), |
c3f6f71d JM |
1173 | proc_get_current_thread (pi)); |
1174 | } | |
c906108c | 1175 | |
77382aee | 1176 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1177 | pi->gregs_valid = pi->status_valid; |
1178 | #ifdef NEW_PROC_API | |
77382aee PA |
1179 | /* In the read/write multiple-fd model, the status struct includes |
1180 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1181 | pi->fpregs_valid = pi->status_valid; |
1182 | #endif | |
77382aee | 1183 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1184 | } |
c906108c | 1185 | |
77382aee | 1186 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d JM |
1187 | |
1188 | long | |
fba45db2 | 1189 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1190 | { |
1191 | if (!pi->status_valid) | |
1192 | if (!proc_get_status (pi)) | |
1193 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1194 | |
c3f6f71d | 1195 | #ifdef NEW_PROC_API |
0d06e24b JM |
1196 | # ifdef UNIXWARE |
1197 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1198 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1199 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1200 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1201 | # else | |
c3f6f71d | 1202 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1203 | # endif |
c3f6f71d JM |
1204 | #else |
1205 | return pi->prstatus.pr_flags; | |
1206 | #endif | |
1207 | } | |
c906108c | 1208 | |
77382aee | 1209 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1210 | |
c3f6f71d | 1211 | int |
fba45db2 | 1212 | proc_why (procinfo *pi) |
c3f6f71d JM |
1213 | { |
1214 | if (!pi->status_valid) | |
1215 | if (!proc_get_status (pi)) | |
1216 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1217 | |
c3f6f71d JM |
1218 | #ifdef NEW_PROC_API |
1219 | return pi->prstatus.pr_lwp.pr_why; | |
1220 | #else | |
1221 | return pi->prstatus.pr_why; | |
1222 | #endif | |
1223 | } | |
c906108c | 1224 | |
77382aee | 1225 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1226 | |
c3f6f71d | 1227 | int |
fba45db2 | 1228 | proc_what (procinfo *pi) |
c3f6f71d JM |
1229 | { |
1230 | if (!pi->status_valid) | |
1231 | if (!proc_get_status (pi)) | |
1232 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1233 | |
c3f6f71d JM |
1234 | #ifdef NEW_PROC_API |
1235 | return pi->prstatus.pr_lwp.pr_what; | |
1236 | #else | |
1237 | return pi->prstatus.pr_what; | |
c906108c | 1238 | #endif |
c3f6f71d | 1239 | } |
c906108c | 1240 | |
77382aee PA |
1241 | /* This function is only called when PI is stopped by a watchpoint. |
1242 | Assuming the OS supports it, write to *ADDR the data address which | |
1243 | triggered it and return 1. Return 0 if it is not possible to know | |
1244 | the address. */ | |
bf701c2c PM |
1245 | |
1246 | static int | |
1247 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1248 | { | |
1249 | if (!pi->status_valid) | |
1250 | if (!proc_get_status (pi)) | |
1251 | return 0; | |
1252 | ||
1253 | #ifdef NEW_PROC_API | |
1254 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1255 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1256 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1257 | #else | |
1258 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1259 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1260 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1261 | #endif | |
1262 | return 1; | |
1263 | } | |
1264 | ||
c3f6f71d | 1265 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1266 | |
1267 | /* Returns the pr_nsysarg field (number of args to the current | |
1268 | syscall). */ | |
c3f6f71d JM |
1269 | |
1270 | int | |
fba45db2 | 1271 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1272 | { |
1273 | if (!pi->status_valid) | |
1274 | if (!proc_get_status (pi)) | |
1275 | return 0; | |
19958708 | 1276 | |
c3f6f71d JM |
1277 | #ifdef NEW_PROC_API |
1278 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1279 | #else | |
1280 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1281 | #endif |
c3f6f71d | 1282 | } |
c906108c | 1283 | |
77382aee PA |
1284 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1285 | syscall). */ | |
c906108c | 1286 | |
c3f6f71d | 1287 | long * |
fba45db2 | 1288 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1289 | { |
1290 | if (!pi->status_valid) | |
1291 | if (!proc_get_status (pi)) | |
1292 | return NULL; | |
19958708 | 1293 | |
c3f6f71d JM |
1294 | #ifdef NEW_PROC_API |
1295 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1296 | #else | |
1297 | return (long *) &pi->prstatus.pr_sysarg; | |
1298 | #endif | |
1299 | } | |
c906108c | 1300 | |
77382aee PA |
1301 | /* Returns the pr_syscall field (id of current syscall if we are in |
1302 | one). */ | |
c906108c | 1303 | |
c3f6f71d | 1304 | int |
fba45db2 | 1305 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1306 | { |
1307 | if (!pi->status_valid) | |
1308 | if (!proc_get_status (pi)) | |
1309 | return 0; | |
19958708 | 1310 | |
c3f6f71d JM |
1311 | #ifdef NEW_PROC_API |
1312 | return pi->prstatus.pr_lwp.pr_syscall; | |
1313 | #else | |
1314 | return pi->prstatus.pr_syscall; | |
1315 | #endif | |
1316 | } | |
1317 | #endif /* PIOCSSPCACT */ | |
c906108c | 1318 | |
77382aee | 1319 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1320 | |
c3f6f71d JM |
1321 | long |
1322 | proc_cursig (struct procinfo *pi) | |
1323 | { | |
1324 | if (!pi->status_valid) | |
1325 | if (!proc_get_status (pi)) | |
1326 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1327 | |
c3f6f71d JM |
1328 | #ifdef NEW_PROC_API |
1329 | return pi->prstatus.pr_lwp.pr_cursig; | |
1330 | #else | |
1331 | return pi->prstatus.pr_cursig; | |
1332 | #endif | |
1333 | } | |
c906108c | 1334 | |
77382aee PA |
1335 | /* === I appologize for the messiness of this function. |
1336 | === This is an area where the different versions of | |
1337 | === /proc are more inconsistent than usual. | |
1338 | ||
1339 | Set or reset any of the following process flags: | |
1340 | PR_FORK -- forked child will inherit trace flags | |
1341 | PR_RLC -- traced process runs when last /proc file closed. | |
1342 | PR_KLC -- traced process is killed when last /proc file closed. | |
1343 | PR_ASYNC -- LWP's get to run/stop independently. | |
1344 | ||
1345 | There are three methods for doing this function: | |
1346 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1347 | [Sol6, Sol7, UW] | |
1348 | 2) Middle: PIOCSET/PIOCRESET | |
1349 | [Irix, Sol5] | |
1350 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1351 | [OSF, Sol5] | |
1352 | ||
1353 | Note: Irix does not define PR_ASYNC. | |
1354 | Note: OSF does not define PR_KLC. | |
1355 | Note: OSF is the only one that can ONLY use the oldest method. | |
1356 | ||
1357 | Arguments: | |
1358 | pi -- the procinfo | |
1359 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1360 | mode -- 1 for set, 0 for reset. | |
1361 | ||
1362 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1363 | |
c3f6f71d | 1364 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1365 | |
c3f6f71d | 1366 | static int |
fba45db2 | 1367 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1368 | { |
1369 | long win = 0; /* default to fail */ | |
1370 | ||
77382aee PA |
1371 | /* These operations affect the process as a whole, and applying them |
1372 | to an individual LWP has the same meaning as applying them to the | |
1373 | main process. Therefore, if we're ever called with a pointer to | |
1374 | an LWP's procinfo, let's substitute the process's procinfo and | |
1375 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1376 | |
1377 | if (pi->pid != 0) | |
1378 | pi = find_procinfo_or_die (pi->pid, 0); | |
1379 | ||
1380 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1381 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1382 | (which for no obvious reason has a different definition |
1383 | from one operating system to the next...) */ | |
1384 | #ifdef PCUNSET | |
1385 | #define GDBRESET PCUNSET | |
37de36c6 | 1386 | #else |
c3f6f71d JM |
1387 | #ifdef PCRESET |
1388 | #define GDBRESET PCRESET | |
37de36c6 | 1389 | #endif |
c906108c | 1390 | #endif |
c3f6f71d | 1391 | { |
37de36c6 | 1392 | procfs_ctl_t arg[2]; |
c906108c | 1393 | |
c3f6f71d JM |
1394 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1395 | arg[0] = PCSET; | |
1396 | else /* Reset the flag */ | |
1397 | arg[0] = GDBRESET; | |
c5aa993b | 1398 | |
c3f6f71d JM |
1399 | arg[1] = flag; |
1400 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1401 | } | |
1402 | #else | |
1403 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1404 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1405 | { | |
1406 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1407 | } | |
1408 | else /* Reset the flag */ | |
1409 | { | |
1410 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1411 | } | |
c906108c | 1412 | |
c3f6f71d JM |
1413 | #else |
1414 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1415 | switch (flag) { | |
1416 | case PR_RLC: | |
1417 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1418 | { | |
1419 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1420 | } | |
1421 | else /* Clear run-on-last-close */ | |
1422 | { | |
1423 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1424 | } | |
1425 | break; | |
1426 | case PR_FORK: | |
1427 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1428 | { | |
1429 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1430 | } | |
1431 | else /* Clear inherit-on-fork */ | |
1432 | { | |
1433 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1434 | } | |
1435 | break; | |
1436 | default: | |
1437 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1438 | break; | |
1439 | } | |
1440 | #endif | |
1441 | #endif | |
1442 | #endif | |
1443 | #undef GDBRESET | |
77382aee PA |
1444 | /* The above operation renders the procinfo's cached pstatus |
1445 | obsolete. */ | |
c3f6f71d | 1446 | pi->status_valid = 0; |
c906108c | 1447 | |
c3f6f71d | 1448 | if (!win) |
8a3fe4f8 | 1449 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1450 | flag == PR_FORK ? "PR_FORK" : |
1451 | flag == PR_RLC ? "PR_RLC" : | |
1452 | #ifdef PR_ASYNC | |
1453 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1454 | #endif |
1455 | #ifdef PR_KLC | |
1456 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1457 | #endif |
1458 | "<unknown flag>", | |
1459 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1460 | |
c3f6f71d JM |
1461 | return win; |
1462 | } | |
c906108c | 1463 | |
77382aee PA |
1464 | /* Set the run_on_last_close flag. Process with all threads will |
1465 | become runnable when debugger closes all /proc fds. Returns | |
1466 | non-zero for success, zero for failure. */ | |
c906108c | 1467 | |
c3f6f71d | 1468 | int |
fba45db2 | 1469 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1470 | { |
c3f6f71d JM |
1471 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1472 | } | |
c906108c | 1473 | |
77382aee PA |
1474 | /* Reset the run_on_last_close flag. The process will NOT become |
1475 | runnable when debugger closes its file handles. Returns non-zero | |
1476 | for success, zero for failure. */ | |
c906108c | 1477 | |
c3f6f71d | 1478 | int |
fba45db2 | 1479 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1480 | { |
1481 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1482 | } |
1483 | ||
0d06e24b | 1484 | #ifdef PR_KLC |
77382aee PA |
1485 | /* Set the kill_on_last_close flag. Process with all threads will be |
1486 | killed when debugger closes all /proc fds (or debugger exits or | |
1487 | dies). Returns non-zero for success, zero for failure. */ | |
0d06e24b JM |
1488 | |
1489 | int | |
fba45db2 | 1490 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1491 | { |
1492 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1493 | } | |
1494 | ||
77382aee PA |
1495 | /* Reset the kill_on_last_close flag. Process will NOT be killed when |
1496 | debugger closes its file handles (or exits or dies). Returns | |
1497 | non-zero for success, zero for failure. */ | |
0d06e24b JM |
1498 | |
1499 | int | |
fba45db2 | 1500 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1501 | { |
1502 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1503 | } | |
1504 | #endif /* PR_KLC */ | |
1505 | ||
77382aee PA |
1506 | /* Set inherit_on_fork flag. If the process forks a child while we |
1507 | are registered for events in the parent, then we will also recieve | |
1508 | events from the child. Returns non-zero for success, zero for | |
1509 | failure. */ | |
c906108c | 1510 | |
c3f6f71d | 1511 | int |
fba45db2 | 1512 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1513 | { |
1514 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1515 | } | |
c5aa993b | 1516 | |
77382aee PA |
1517 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1518 | are registered for events in the parent, then we will NOT recieve | |
1519 | events from the child. Returns non-zero for success, zero for | |
1520 | failure. */ | |
c906108c | 1521 | |
c3f6f71d | 1522 | int |
fba45db2 | 1523 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1524 | { |
1525 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1526 | } | |
c906108c | 1527 | |
c3f6f71d | 1528 | #ifdef PR_ASYNC |
77382aee PA |
1529 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1530 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1531 | non-zero for success, zero for failure. */ | |
c906108c | 1532 | |
c3f6f71d | 1533 | int |
fba45db2 | 1534 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1535 | { |
1536 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1537 | } | |
c906108c | 1538 | |
77382aee PA |
1539 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1540 | (signal etc.), then all other LWPs will stop as well. Returns | |
1541 | non-zero for success, zero for failure. */ | |
c906108c | 1542 | |
c3f6f71d | 1543 | int |
fba45db2 | 1544 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1545 | { |
1546 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1547 | } | |
1548 | #endif /* PR_ASYNC */ | |
c906108c | 1549 | |
77382aee PA |
1550 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1551 | for success, zero for failure. */ | |
c906108c | 1552 | |
c3f6f71d | 1553 | int |
fba45db2 | 1554 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1555 | { |
1556 | int win; | |
c906108c | 1557 | |
77382aee PA |
1558 | /* We might conceivably apply this operation to an LWP, and the |
1559 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1560 | |
c3f6f71d JM |
1561 | if (pi->ctl_fd == 0 && |
1562 | open_procinfo_files (pi, FD_CTL) == 0) | |
1563 | return 0; | |
1564 | else | |
1565 | { | |
1566 | #ifdef NEW_PROC_API | |
37de36c6 | 1567 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1568 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1569 | #else /* ioctl method */ | |
1570 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1571 | /* Note: the call also reads the prstatus. */ | |
1572 | if (win) | |
1573 | { | |
1574 | pi->status_valid = 1; | |
19958708 | 1575 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1576 | proc_why (pi), |
19958708 | 1577 | proc_what (pi), |
c3f6f71d JM |
1578 | proc_get_current_thread (pi)); |
1579 | } | |
1580 | #endif | |
1581 | } | |
c906108c | 1582 | |
c3f6f71d JM |
1583 | return win; |
1584 | } | |
c5aa993b | 1585 | |
77382aee PA |
1586 | /* Wait for the process or LWP to stop (block until it does). Returns |
1587 | non-zero for success, zero for failure. */ | |
c906108c | 1588 | |
c3f6f71d | 1589 | int |
fba45db2 | 1590 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1591 | { |
c3f6f71d JM |
1592 | int win; |
1593 | ||
77382aee PA |
1594 | /* We should never have to apply this operation to any procinfo |
1595 | except the one for the main process. If that ever changes for | |
1596 | any reason, then take out the following clause and replace it | |
1597 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1598 | |
c3f6f71d JM |
1599 | if (pi->tid != 0) |
1600 | pi = find_procinfo_or_die (pi->pid, 0); | |
1601 | ||
1602 | #ifdef NEW_PROC_API | |
1603 | { | |
37de36c6 | 1604 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1605 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1606 | /* We been runnin' and we stopped -- need to update status. */ | |
1607 | pi->status_valid = 0; | |
1608 | } | |
1609 | #else /* ioctl method */ | |
1610 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1611 | /* Above call also refreshes the prstatus. */ | |
1612 | if (win) | |
1613 | { | |
1614 | pi->status_valid = 1; | |
19958708 | 1615 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1616 | proc_why (pi), |
19958708 | 1617 | proc_what (pi), |
c3f6f71d JM |
1618 | proc_get_current_thread (pi)); |
1619 | } | |
c906108c SS |
1620 | #endif |
1621 | ||
c3f6f71d | 1622 | return win; |
c906108c SS |
1623 | } |
1624 | ||
77382aee PA |
1625 | /* Make the process or LWP runnable. |
1626 | ||
1627 | Options (not all are implemented): | |
1628 | - single-step | |
1629 | - clear current fault | |
1630 | - clear current signal | |
1631 | - abort the current system call | |
1632 | - stop as soon as finished with system call | |
1633 | - (ioctl): set traced signal set | |
1634 | - (ioctl): set held signal set | |
1635 | - (ioctl): set traced fault set | |
1636 | - (ioctl): set start pc (vaddr) | |
1637 | ||
1638 | Always clears the current fault. PI is the process or LWP to | |
1639 | operate on. If STEP is true, set the process or LWP to trap after | |
1640 | one instruction. If SIGNO is zero, clear the current signal if | |
1641 | any; if non-zero, set the current signal to this one. Returns | |
1642 | non-zero for success, zero for failure. */ | |
c3f6f71d JM |
1643 | |
1644 | int | |
fba45db2 | 1645 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1646 | { |
1647 | int win; | |
1648 | int runflags; | |
1649 | ||
77382aee PA |
1650 | /* We will probably have to apply this operation to individual |
1651 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1652 | |
c3f6f71d JM |
1653 | if (pi->ctl_fd == 0 && |
1654 | open_procinfo_files (pi, FD_CTL) == 0) | |
1655 | { | |
1656 | return 0; | |
1657 | } | |
c906108c | 1658 | |
c3f6f71d JM |
1659 | runflags = PRCFAULT; /* always clear current fault */ |
1660 | if (step) | |
1661 | runflags |= PRSTEP; | |
1662 | if (signo == 0) | |
1663 | runflags |= PRCSIG; | |
1664 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1665 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1666 | |
c3f6f71d JM |
1667 | #ifdef NEW_PROC_API |
1668 | { | |
37de36c6 | 1669 | procfs_ctl_t cmd[2]; |
c906108c | 1670 | |
c3f6f71d JM |
1671 | cmd[0] = PCRUN; |
1672 | cmd[1] = runflags; | |
1673 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1674 | } | |
1675 | #else /* ioctl method */ | |
1676 | { | |
1677 | prrun_t prrun; | |
c906108c | 1678 | |
c3f6f71d JM |
1679 | memset (&prrun, 0, sizeof (prrun)); |
1680 | prrun.pr_flags = runflags; | |
1681 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1682 | } | |
1683 | #endif | |
c906108c | 1684 | |
c3f6f71d JM |
1685 | return win; |
1686 | } | |
c906108c | 1687 | |
77382aee PA |
1688 | /* Register to trace signals in the process or LWP. Returns non-zero |
1689 | for success, zero for failure. */ | |
c906108c | 1690 | |
c3f6f71d | 1691 | int |
37de36c6 | 1692 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1693 | { |
c3f6f71d JM |
1694 | int win; |
1695 | ||
77382aee PA |
1696 | /* We should never have to apply this operation to any procinfo |
1697 | except the one for the main process. If that ever changes for | |
1698 | any reason, then take out the following clause and replace it | |
1699 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1700 | |
c3f6f71d JM |
1701 | if (pi->tid != 0) |
1702 | pi = find_procinfo_or_die (pi->pid, 0); | |
1703 | ||
1704 | #ifdef NEW_PROC_API | |
1705 | { | |
1706 | struct { | |
37de36c6 | 1707 | procfs_ctl_t cmd; |
c3f6f71d | 1708 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1709 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1710 | } arg; |
c906108c | 1711 | |
c3f6f71d | 1712 | arg.cmd = PCSTRACE; |
37de36c6 | 1713 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1714 | |
c3f6f71d JM |
1715 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1716 | } | |
1717 | #else /* ioctl method */ | |
1718 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1719 | #endif | |
1720 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1721 | pi->status_valid = 0; | |
c906108c | 1722 | |
c3f6f71d | 1723 | if (!win) |
8a3fe4f8 | 1724 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1725 | return win; |
c906108c SS |
1726 | } |
1727 | ||
77382aee PA |
1728 | /* Register to trace hardware faults in the process or LWP. Returns |
1729 | non-zero for success, zero for failure. */ | |
c906108c | 1730 | |
c3f6f71d | 1731 | int |
fba45db2 | 1732 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1733 | { |
1734 | int win; | |
1735 | ||
77382aee PA |
1736 | /* We should never have to apply this operation to any procinfo |
1737 | except the one for the main process. If that ever changes for | |
1738 | any reason, then take out the following clause and replace it | |
1739 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1740 | |
c3f6f71d JM |
1741 | if (pi->tid != 0) |
1742 | pi = find_procinfo_or_die (pi->pid, 0); | |
1743 | ||
1744 | #ifdef NEW_PROC_API | |
1745 | { | |
1746 | struct { | |
37de36c6 | 1747 | procfs_ctl_t cmd; |
c3f6f71d JM |
1748 | /* Use char array to avoid alignment issues. */ |
1749 | char fltset[sizeof (fltset_t)]; | |
1750 | } arg; | |
c906108c | 1751 | |
c3f6f71d JM |
1752 | arg.cmd = PCSFAULT; |
1753 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1754 | |
c3f6f71d JM |
1755 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1756 | } | |
1757 | #else /* ioctl method */ | |
1758 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1759 | #endif | |
1760 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1761 | pi->status_valid = 0; | |
c906108c | 1762 | |
c3f6f71d JM |
1763 | return win; |
1764 | } | |
c5aa993b | 1765 | |
77382aee PA |
1766 | /* Register to trace entry to system calls in the process or LWP. |
1767 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1768 | |
c3f6f71d | 1769 | int |
fba45db2 | 1770 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1771 | { |
c3f6f71d JM |
1772 | int win; |
1773 | ||
77382aee PA |
1774 | /* We should never have to apply this operation to any procinfo |
1775 | except the one for the main process. If that ever changes for | |
1776 | any reason, then take out the following clause and replace it | |
1777 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1778 | |
c3f6f71d JM |
1779 | if (pi->tid != 0) |
1780 | pi = find_procinfo_or_die (pi->pid, 0); | |
1781 | ||
1782 | #ifdef NEW_PROC_API | |
1783 | { | |
37de36c6 KB |
1784 | struct gdb_proc_ctl_pcsentry { |
1785 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1786 | /* Use char array to avoid alignment issues. */ |
1787 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1788 | } *argp; |
1789 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1790 | - sizeof (sysset_t) |
37de36c6 | 1791 | + sysset_t_size (pi); |
c3f6f71d | 1792 | |
37de36c6 | 1793 | argp = xmalloc (argp_size); |
c3f6f71d | 1794 | |
37de36c6 KB |
1795 | argp->cmd = PCSENTRY; |
1796 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1797 | ||
1798 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1799 | xfree (argp); | |
c3f6f71d JM |
1800 | } |
1801 | #else /* ioctl method */ | |
1802 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1803 | #endif | |
77382aee PA |
1804 | /* The above operation renders the procinfo's cached pstatus |
1805 | obsolete. */ | |
c3f6f71d | 1806 | pi->status_valid = 0; |
19958708 | 1807 | |
c3f6f71d | 1808 | return win; |
c906108c SS |
1809 | } |
1810 | ||
77382aee PA |
1811 | /* Register to trace exit from system calls in the process or LWP. |
1812 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1813 | |
c3f6f71d | 1814 | int |
fba45db2 | 1815 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1816 | { |
1817 | int win; | |
1818 | ||
77382aee PA |
1819 | /* We should never have to apply this operation to any procinfo |
1820 | except the one for the main process. If that ever changes for | |
1821 | any reason, then take out the following clause and replace it | |
1822 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1823 | |
c3f6f71d JM |
1824 | if (pi->tid != 0) |
1825 | pi = find_procinfo_or_die (pi->pid, 0); | |
1826 | ||
1827 | #ifdef NEW_PROC_API | |
1828 | { | |
37de36c6 KB |
1829 | struct gdb_proc_ctl_pcsexit { |
1830 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1831 | /* Use char array to avoid alignment issues. */ |
1832 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1833 | } *argp; |
1834 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1835 | - sizeof (sysset_t) |
37de36c6 | 1836 | + sysset_t_size (pi); |
c906108c | 1837 | |
37de36c6 | 1838 | argp = xmalloc (argp_size); |
c906108c | 1839 | |
37de36c6 KB |
1840 | argp->cmd = PCSEXIT; |
1841 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1842 | ||
1843 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1844 | xfree (argp); | |
c3f6f71d JM |
1845 | } |
1846 | #else /* ioctl method */ | |
1847 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1848 | #endif | |
77382aee PA |
1849 | /* The above operation renders the procinfo's cached pstatus |
1850 | obsolete. */ | |
c3f6f71d | 1851 | pi->status_valid = 0; |
c906108c | 1852 | |
c3f6f71d JM |
1853 | return win; |
1854 | } | |
c906108c | 1855 | |
77382aee PA |
1856 | /* Specify the set of blocked / held signals in the process or LWP. |
1857 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1858 | |
c3f6f71d | 1859 | int |
37de36c6 | 1860 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1861 | { |
c3f6f71d JM |
1862 | int win; |
1863 | ||
77382aee PA |
1864 | /* We should never have to apply this operation to any procinfo |
1865 | except the one for the main process. If that ever changes for | |
1866 | any reason, then take out the following clause and replace it | |
1867 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1868 | |
c3f6f71d JM |
1869 | if (pi->tid != 0) |
1870 | pi = find_procinfo_or_die (pi->pid, 0); | |
1871 | ||
1872 | #ifdef NEW_PROC_API | |
1873 | { | |
1874 | struct { | |
37de36c6 | 1875 | procfs_ctl_t cmd; |
c3f6f71d | 1876 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1877 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1878 | } arg; |
1879 | ||
1880 | arg.cmd = PCSHOLD; | |
37de36c6 | 1881 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1882 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1883 | } | |
c906108c | 1884 | #else |
c3f6f71d | 1885 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1886 | #endif |
77382aee PA |
1887 | /* The above operation renders the procinfo's cached pstatus |
1888 | obsolete. */ | |
c3f6f71d JM |
1889 | pi->status_valid = 0; |
1890 | ||
1891 | return win; | |
c906108c SS |
1892 | } |
1893 | ||
77382aee PA |
1894 | /* Returns the set of signals that are pending in the process or LWP. |
1895 | Will also copy the sigset if SAVE is non-zero. */ | |
c906108c | 1896 | |
37de36c6 KB |
1897 | gdb_sigset_t * |
1898 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 1899 | { |
37de36c6 | 1900 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1901 | |
77382aee PA |
1902 | /* We should never have to apply this operation to any procinfo |
1903 | except the one for the main process. If that ever changes for | |
1904 | any reason, then take out the following clause and replace it | |
1905 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1906 | |
c3f6f71d JM |
1907 | if (pi->tid != 0) |
1908 | pi = find_procinfo_or_die (pi->pid, 0); | |
1909 | ||
1910 | if (!pi->status_valid) | |
1911 | if (!proc_get_status (pi)) | |
1912 | return NULL; | |
1913 | ||
1914 | #ifdef NEW_PROC_API | |
1915 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
1916 | #else | |
1917 | ret = &pi->prstatus.pr_sigpend; | |
1918 | #endif | |
1919 | if (save && ret) | |
37de36c6 | 1920 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1921 | |
c3f6f71d JM |
1922 | return ret; |
1923 | } | |
c906108c | 1924 | |
77382aee PA |
1925 | /* Returns the set of signal actions. Will also copy the sigactionset |
1926 | if SAVE is non-zero. */ | |
c906108c | 1927 | |
37de36c6 KB |
1928 | gdb_sigaction_t * |
1929 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 1930 | { |
37de36c6 | 1931 | gdb_sigaction_t *ret = NULL; |
c3f6f71d | 1932 | |
77382aee PA |
1933 | /* We should never have to apply this operation to any procinfo |
1934 | except the one for the main process. If that ever changes for | |
1935 | any reason, then take out the following clause and replace it | |
1936 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1937 | |
c3f6f71d JM |
1938 | if (pi->tid != 0) |
1939 | pi = find_procinfo_or_die (pi->pid, 0); | |
1940 | ||
1941 | if (!pi->status_valid) | |
1942 | if (!proc_get_status (pi)) | |
1943 | return NULL; | |
1944 | ||
1945 | #ifdef NEW_PROC_API | |
1946 | ret = &pi->prstatus.pr_lwp.pr_action; | |
1947 | #else | |
1948 | ret = &pi->prstatus.pr_action; | |
1949 | #endif | |
1950 | if (save && ret) | |
37de36c6 | 1951 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 1952 | |
c3f6f71d JM |
1953 | return ret; |
1954 | } | |
c5aa993b | 1955 | |
77382aee PA |
1956 | /* Returns the set of signals that are held / blocked. Will also copy |
1957 | the sigset if SAVE is non-zero. */ | |
c906108c | 1958 | |
37de36c6 KB |
1959 | gdb_sigset_t * |
1960 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 1961 | { |
37de36c6 | 1962 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1963 | |
77382aee PA |
1964 | /* We should never have to apply this operation to any procinfo |
1965 | except the one for the main process. If that ever changes for | |
1966 | any reason, then take out the following clause and replace it | |
1967 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1968 | |
c3f6f71d JM |
1969 | if (pi->tid != 0) |
1970 | pi = find_procinfo_or_die (pi->pid, 0); | |
1971 | ||
1972 | #ifdef NEW_PROC_API | |
1973 | if (!pi->status_valid) | |
1974 | if (!proc_get_status (pi)) | |
1975 | return NULL; | |
1976 | ||
1977 | #ifdef UNIXWARE | |
1978 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1979 | #else |
c3f6f71d JM |
1980 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1981 | #endif /* UNIXWARE */ | |
1982 | #else /* not NEW_PROC_API */ | |
1983 | { | |
37de36c6 | 1984 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1985 | |
1986 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1987 | ret = &sigheld; | |
1988 | } | |
1989 | #endif /* NEW_PROC_API */ | |
1990 | if (save && ret) | |
37de36c6 | 1991 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1992 | |
1993 | return ret; | |
c906108c SS |
1994 | } |
1995 | ||
77382aee PA |
1996 | /* Returns the set of signals that are traced / debugged. Will also |
1997 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1998 | |
37de36c6 KB |
1999 | gdb_sigset_t * |
2000 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2001 | { |
37de36c6 | 2002 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 2003 | |
77382aee PA |
2004 | /* We should never have to apply this operation to any procinfo |
2005 | except the one for the main process. If that ever changes for | |
2006 | any reason, then take out the following clause and replace it | |
2007 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2008 | |
c3f6f71d JM |
2009 | if (pi->tid != 0) |
2010 | pi = find_procinfo_or_die (pi->pid, 0); | |
2011 | ||
2012 | #ifdef NEW_PROC_API | |
2013 | if (!pi->status_valid) | |
2014 | if (!proc_get_status (pi)) | |
2015 | return NULL; | |
2016 | ||
2017 | ret = &pi->prstatus.pr_sigtrace; | |
2018 | #else | |
2019 | { | |
37de36c6 | 2020 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2021 | |
2022 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2023 | ret = &sigtrace; | |
2024 | } | |
c906108c | 2025 | #endif |
c3f6f71d | 2026 | if (save && ret) |
37de36c6 | 2027 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2028 | |
c3f6f71d JM |
2029 | return ret; |
2030 | } | |
c906108c | 2031 | |
77382aee PA |
2032 | /* Add SIGNO to the set of signals that are traced. Returns non-zero |
2033 | for success, zero for failure. */ | |
c906108c | 2034 | |
c3f6f71d | 2035 | int |
fba45db2 | 2036 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2037 | { |
37de36c6 | 2038 | gdb_sigset_t temp; |
c3f6f71d | 2039 | |
77382aee PA |
2040 | /* We should never have to apply this operation to any procinfo |
2041 | except the one for the main process. If that ever changes for | |
2042 | any reason, then take out the following clause and replace it | |
2043 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2044 | |
c3f6f71d JM |
2045 | if (pi->tid != 0) |
2046 | pi = find_procinfo_or_die (pi->pid, 0); | |
2047 | ||
2048 | if (pi) | |
c906108c | 2049 | { |
c3f6f71d | 2050 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2051 | { |
3c95f01c | 2052 | gdb_praddset (&temp, signo); |
c3f6f71d | 2053 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2054 | } |
2055 | } | |
c5aa993b | 2056 | |
c3f6f71d JM |
2057 | return 0; /* failure */ |
2058 | } | |
c906108c | 2059 | |
77382aee PA |
2060 | /* Remove SIGNO from the set of signals that are traced. Returns |
2061 | non-zero for success, zero for failure. */ | |
c906108c | 2062 | |
c3f6f71d | 2063 | int |
fba45db2 | 2064 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2065 | { |
37de36c6 | 2066 | gdb_sigset_t temp; |
c3f6f71d | 2067 | |
77382aee PA |
2068 | /* We should never have to apply this operation to any procinfo |
2069 | except the one for the main process. If that ever changes for | |
2070 | any reason, then take out the following clause and replace it | |
2071 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2072 | |
c3f6f71d JM |
2073 | if (pi->tid != 0) |
2074 | pi = find_procinfo_or_die (pi->pid, 0); | |
2075 | ||
2076 | if (pi) | |
c906108c | 2077 | { |
c3f6f71d | 2078 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2079 | { |
3c95f01c | 2080 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2081 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2082 | } |
c906108c | 2083 | } |
c906108c | 2084 | |
c3f6f71d | 2085 | return 0; /* failure */ |
c906108c SS |
2086 | } |
2087 | ||
77382aee PA |
2088 | /* Returns the set of hardware faults that are traced /debugged. Will |
2089 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d JM |
2090 | |
2091 | fltset_t * | |
fba45db2 | 2092 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2093 | { |
2094 | fltset_t *ret = NULL; | |
2095 | ||
77382aee PA |
2096 | /* We should never have to apply this operation to any procinfo |
2097 | except the one for the main process. If that ever changes for | |
2098 | any reason, then take out the following clause and replace it | |
2099 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2100 | |
c3f6f71d JM |
2101 | if (pi->tid != 0) |
2102 | pi = find_procinfo_or_die (pi->pid, 0); | |
2103 | ||
2104 | #ifdef NEW_PROC_API | |
2105 | if (!pi->status_valid) | |
2106 | if (!proc_get_status (pi)) | |
2107 | return NULL; | |
2108 | ||
2109 | ret = &pi->prstatus.pr_flttrace; | |
2110 | #else | |
2111 | { | |
2112 | static fltset_t flttrace; | |
2113 | ||
2114 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2115 | ret = &flttrace; | |
2116 | } | |
2117 | #endif | |
2118 | if (save && ret) | |
2119 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2120 | |
c3f6f71d JM |
2121 | return ret; |
2122 | } | |
c906108c | 2123 | |
77382aee PA |
2124 | /* Returns the set of syscalls that are traced /debugged on entry. |
2125 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2126 | |
c3f6f71d | 2127 | sysset_t * |
fba45db2 | 2128 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2129 | { |
2130 | sysset_t *ret = NULL; | |
2131 | ||
77382aee PA |
2132 | /* We should never have to apply this operation to any procinfo |
2133 | except the one for the main process. If that ever changes for | |
2134 | any reason, then take out the following clause and replace it | |
2135 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2136 | |
c3f6f71d JM |
2137 | if (pi->tid != 0) |
2138 | pi = find_procinfo_or_die (pi->pid, 0); | |
2139 | ||
2140 | #ifdef NEW_PROC_API | |
2141 | if (!pi->status_valid) | |
2142 | if (!proc_get_status (pi)) | |
2143 | return NULL; | |
2144 | ||
37de36c6 | 2145 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2146 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2147 | #else /* DYNAMIC_SYSCALLS */ |
2148 | { | |
2149 | static sysset_t *sysentry; | |
2150 | size_t size; | |
2151 | ||
2152 | if (!sysentry) | |
2153 | sysentry = sysset_t_alloc (pi); | |
2154 | ret = sysentry; | |
2155 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2156 | return NULL; | |
2157 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2158 | { | |
2159 | gdb_premptysysset (sysentry); | |
2160 | } | |
2161 | else | |
2162 | { | |
2163 | int rsize; | |
2164 | ||
2165 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 2166 | SEEK_SET) |
37de36c6 KB |
2167 | != (off_t) pi->prstatus.pr_sysentry_offset) |
2168 | return NULL; | |
2169 | size = sysset_t_size (pi); | |
2170 | gdb_premptysysset (sysentry); | |
2171 | rsize = read (pi->status_fd, sysentry, size); | |
2172 | if (rsize < 0) | |
2173 | return NULL; | |
2174 | } | |
2175 | } | |
2176 | #endif /* DYNAMIC_SYSCALLS */ | |
2177 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2178 | { |
2179 | static sysset_t sysentry; | |
c906108c | 2180 | |
c3f6f71d JM |
2181 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2182 | ret = &sysentry; | |
2183 | } | |
37de36c6 | 2184 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2185 | if (save && ret) |
37de36c6 | 2186 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2187 | |
c3f6f71d JM |
2188 | return ret; |
2189 | } | |
c5aa993b | 2190 | |
77382aee PA |
2191 | /* Returns the set of syscalls that are traced /debugged on exit. |
2192 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 2193 | |
c3f6f71d | 2194 | sysset_t * |
fba45db2 | 2195 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2196 | { |
c3f6f71d JM |
2197 | sysset_t * ret = NULL; |
2198 | ||
77382aee PA |
2199 | /* We should never have to apply this operation to any procinfo |
2200 | except the one for the main process. If that ever changes for | |
2201 | any reason, then take out the following clause and replace it | |
2202 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2203 | |
c3f6f71d JM |
2204 | if (pi->tid != 0) |
2205 | pi = find_procinfo_or_die (pi->pid, 0); | |
2206 | ||
2207 | #ifdef NEW_PROC_API | |
2208 | if (!pi->status_valid) | |
2209 | if (!proc_get_status (pi)) | |
2210 | return NULL; | |
2211 | ||
37de36c6 | 2212 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2213 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2214 | #else /* DYNAMIC_SYSCALLS */ |
2215 | { | |
2216 | static sysset_t *sysexit; | |
2217 | size_t size; | |
2218 | ||
2219 | if (!sysexit) | |
2220 | sysexit = sysset_t_alloc (pi); | |
2221 | ret = sysexit; | |
2222 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2223 | return NULL; | |
2224 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2225 | { | |
2226 | gdb_premptysysset (sysexit); | |
2227 | } | |
2228 | else | |
2229 | { | |
2230 | int rsize; | |
2231 | ||
77382aee PA |
2232 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2233 | SEEK_SET) | |
37de36c6 KB |
2234 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2235 | return NULL; | |
2236 | size = sysset_t_size (pi); | |
2237 | gdb_premptysysset (sysexit); | |
2238 | rsize = read (pi->status_fd, sysexit, size); | |
2239 | if (rsize < 0) | |
2240 | return NULL; | |
2241 | } | |
2242 | } | |
2243 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2244 | #else |
2245 | { | |
2246 | static sysset_t sysexit; | |
c5aa993b | 2247 | |
c3f6f71d JM |
2248 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2249 | ret = &sysexit; | |
2250 | } | |
2251 | #endif | |
2252 | if (save && ret) | |
37de36c6 | 2253 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2254 | |
2255 | return ret; | |
2256 | } | |
c906108c | 2257 | |
77382aee PA |
2258 | /* The current fault (if any) is cleared; the associated signal will |
2259 | not be sent to the process or LWP when it resumes. Returns | |
2260 | non-zero for success, zero for failure. */ | |
c906108c | 2261 | |
c3f6f71d | 2262 | int |
fba45db2 | 2263 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2264 | { |
2265 | int win; | |
2266 | ||
77382aee PA |
2267 | /* We should never have to apply this operation to any procinfo |
2268 | except the one for the main process. If that ever changes for | |
2269 | any reason, then take out the following clause and replace it | |
2270 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2271 | |
c3f6f71d JM |
2272 | if (pi->tid != 0) |
2273 | pi = find_procinfo_or_die (pi->pid, 0); | |
2274 | ||
2275 | #ifdef NEW_PROC_API | |
2276 | { | |
37de36c6 | 2277 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2278 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2279 | } | |
2280 | #else | |
2281 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2282 | #endif | |
2283 | ||
2284 | return win; | |
c906108c SS |
2285 | } |
2286 | ||
77382aee PA |
2287 | /* Set the "current signal" that will be delivered next to the |
2288 | process. NOTE: semantics are different from those of KILL. This | |
2289 | signal will be delivered to the process or LWP immediately when it | |
2290 | is resumed (even if the signal is held/blocked); it will NOT | |
2291 | immediately cause another event of interest, and will NOT first | |
2292 | trap back to the debugger. Returns non-zero for success, zero for | |
2293 | failure. */ | |
c3f6f71d JM |
2294 | |
2295 | int | |
fba45db2 | 2296 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2297 | { |
2298 | int win; | |
2299 | struct { | |
37de36c6 | 2300 | procfs_ctl_t cmd; |
c3f6f71d | 2301 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2302 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2303 | } arg; |
73930d4d | 2304 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2305 | ptid_t wait_ptid; |
2306 | struct target_waitstatus wait_status; | |
c3f6f71d | 2307 | |
77382aee PA |
2308 | /* We should never have to apply this operation to any procinfo |
2309 | except the one for the main process. If that ever changes for | |
2310 | any reason, then take out the following clause and replace it | |
2311 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2312 | |
c3f6f71d JM |
2313 | if (pi->tid != 0) |
2314 | pi = find_procinfo_or_die (pi->pid, 0); | |
2315 | ||
2316 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2317 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2318 | receives a PIOCSSIG with a signal identical to the current |
2319 | signal, it messes up the current signal. Work around the kernel | |
2320 | bug. */ | |
c3f6f71d JM |
2321 | if (signo > 0 && |
2322 | signo == proc_cursig (pi)) | |
2323 | return 1; /* I assume this is a success? */ | |
2324 | #endif | |
2325 | ||
2326 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2327 | get_last_target_status (&wait_ptid, &wait_status); |
2328 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2329 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2330 | && wait_status.value.sig == target_signal_from_host (signo) | |
2331 | && proc_get_status (pi) | |
2332 | #ifdef NEW_PROC_API | |
2333 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2334 | #else | |
2335 | && pi->prstatus.pr_info.si_signo == signo | |
2336 | #endif | |
2337 | ) | |
2338 | /* Use the siginfo associated with the signal being | |
2339 | redelivered. */ | |
2340 | #ifdef NEW_PROC_API | |
73930d4d | 2341 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2342 | #else |
73930d4d | 2343 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2344 | #endif |
2345 | else | |
2346 | { | |
73930d4d KH |
2347 | mysinfo.si_signo = signo; |
2348 | mysinfo.si_code = 0; | |
2349 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2350 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2351 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2352 | } |
c3f6f71d JM |
2353 | |
2354 | #ifdef NEW_PROC_API | |
2355 | arg.cmd = PCSSIG; | |
2356 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2357 | #else | |
2358 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2359 | #endif | |
c906108c | 2360 | |
c3f6f71d JM |
2361 | return win; |
2362 | } | |
c906108c | 2363 | |
77382aee PA |
2364 | /* The current signal (if any) is cleared, and is not sent to the |
2365 | process or LWP when it resumes. Returns non-zero for success, zero | |
2366 | for failure. */ | |
c906108c | 2367 | |
c3f6f71d | 2368 | int |
fba45db2 | 2369 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2370 | { |
2371 | int win; | |
2372 | ||
77382aee PA |
2373 | /* We should never have to apply this operation to any procinfo |
2374 | except the one for the main process. If that ever changes for | |
2375 | any reason, then take out the following clause and replace it | |
2376 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2377 | |
c3f6f71d JM |
2378 | if (pi->tid != 0) |
2379 | pi = find_procinfo_or_die (pi->pid, 0); | |
2380 | ||
2381 | #ifdef NEW_PROC_API | |
2382 | { | |
2383 | struct { | |
37de36c6 | 2384 | procfs_ctl_t cmd; |
c3f6f71d | 2385 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2386 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2387 | } arg; |
73930d4d | 2388 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2389 | |
2390 | arg.cmd = PCSSIG; | |
2391 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2392 | mysinfo.si_signo = 0; |
2393 | mysinfo.si_code = 0; | |
2394 | mysinfo.si_errno = 0; | |
2395 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2396 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2397 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2398 | |
2399 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2400 | } | |
2401 | #else | |
2402 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2403 | #endif | |
c906108c | 2404 | |
c3f6f71d JM |
2405 | return win; |
2406 | } | |
c906108c | 2407 | |
772cf8be MK |
2408 | /* Return the general-purpose registers for the process or LWP |
2409 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2410 | |
c3f6f71d | 2411 | gdb_gregset_t * |
fba45db2 | 2412 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2413 | { |
2414 | if (!pi->status_valid || !pi->gregs_valid) | |
2415 | if (!proc_get_status (pi)) | |
2416 | return NULL; | |
2417 | ||
772cf8be MK |
2418 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2419 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2420 | |
2421 | #ifdef NEW_PROC_API | |
772cf8be | 2422 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2423 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2424 | # else |
c3f6f71d | 2425 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2426 | # endif |
2427 | #else | |
c3f6f71d | 2428 | return &pi->prstatus.pr_reg; |
772cf8be | 2429 | #endif |
c3f6f71d | 2430 | } |
c5aa993b | 2431 | |
772cf8be MK |
2432 | /* Return the general-purpose registers for the process or LWP |
2433 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2434 | |
c3f6f71d | 2435 | gdb_fpregset_t * |
fba45db2 | 2436 | proc_get_fpregs (procinfo *pi) |
c906108c | 2437 | { |
c3f6f71d JM |
2438 | #ifdef NEW_PROC_API |
2439 | if (!pi->status_valid || !pi->fpregs_valid) | |
2440 | if (!proc_get_status (pi)) | |
2441 | return NULL; | |
2442 | ||
772cf8be | 2443 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2444 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2445 | # else |
c3f6f71d | 2446 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2447 | # endif |
c5aa993b | 2448 | |
772cf8be | 2449 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2450 | if (pi->fpregs_valid) |
772cf8be | 2451 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2452 | else |
c906108c | 2453 | { |
772cf8be | 2454 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2455 | { |
c3f6f71d | 2456 | return NULL; |
c906108c | 2457 | } |
c3f6f71d | 2458 | else |
c906108c | 2459 | { |
772cf8be | 2460 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2461 | struct { |
2462 | long pr_count; | |
2463 | tid_t pr_error_thread; | |
2464 | tfpregset_t thread_1; | |
2465 | } thread_fpregs; | |
2466 | ||
2467 | thread_fpregs.pr_count = 1; | |
2468 | thread_fpregs.thread_1.tid = pi->tid; | |
2469 | ||
772cf8be MK |
2470 | if (pi->tid == 0 |
2471 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2472 | { |
2473 | pi->fpregs_valid = 1; | |
772cf8be | 2474 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2475 | } |
772cf8be MK |
2476 | else if (pi->tid != 0 |
2477 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2478 | { |
2479 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2480 | sizeof (pi->fpregset)); | |
2481 | pi->fpregs_valid = 1; | |
772cf8be | 2482 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2483 | } |
2484 | else | |
2485 | { | |
2486 | return NULL; | |
2487 | } | |
772cf8be | 2488 | # else |
c3f6f71d JM |
2489 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2490 | { | |
2491 | pi->fpregs_valid = 1; | |
772cf8be | 2492 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2493 | } |
2494 | else | |
2495 | { | |
2496 | return NULL; | |
2497 | } | |
772cf8be | 2498 | # endif |
c906108c | 2499 | } |
c906108c | 2500 | } |
772cf8be | 2501 | #endif /* NEW_PROC_API */ |
c906108c SS |
2502 | } |
2503 | ||
772cf8be MK |
2504 | /* Write the general-purpose registers back to the process or LWP |
2505 | corresponding to PI. Return non-zero for success, zero for | |
2506 | failure. */ | |
c3f6f71d JM |
2507 | |
2508 | int | |
fba45db2 | 2509 | proc_set_gregs (procinfo *pi) |
c906108c | 2510 | { |
c3f6f71d JM |
2511 | gdb_gregset_t *gregs; |
2512 | int win; | |
c5aa993b | 2513 | |
772cf8be MK |
2514 | gregs = proc_get_gregs (pi); |
2515 | if (gregs == NULL) | |
2516 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2517 | |
772cf8be | 2518 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2519 | { |
c3f6f71d | 2520 | return 0; |
c906108c | 2521 | } |
c3f6f71d | 2522 | else |
c906108c | 2523 | { |
c3f6f71d JM |
2524 | #ifdef NEW_PROC_API |
2525 | struct { | |
37de36c6 | 2526 | procfs_ctl_t cmd; |
c3f6f71d JM |
2527 | /* Use char array to avoid alignment issues. */ |
2528 | char gregs[sizeof (gdb_gregset_t)]; | |
2529 | } arg; | |
2530 | ||
772cf8be | 2531 | arg.cmd = PCSREG; |
c3f6f71d JM |
2532 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2533 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2534 | #else | |
2535 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2536 | #endif | |
c906108c | 2537 | } |
c3f6f71d | 2538 | |
772cf8be | 2539 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2540 | pi->gregs_valid = 0; |
2541 | return win; | |
c906108c SS |
2542 | } |
2543 | ||
772cf8be MK |
2544 | /* Write the floating-pointer registers back to the process or LWP |
2545 | corresponding to PI. Return non-zero for success, zero for | |
2546 | failure. */ | |
c3f6f71d JM |
2547 | |
2548 | int | |
fba45db2 | 2549 | proc_set_fpregs (procinfo *pi) |
c906108c | 2550 | { |
c3f6f71d JM |
2551 | gdb_fpregset_t *fpregs; |
2552 | int win; | |
2553 | ||
772cf8be MK |
2554 | fpregs = proc_get_fpregs (pi); |
2555 | if (fpregs == NULL) | |
2556 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2557 | |
772cf8be | 2558 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2559 | { |
c3f6f71d | 2560 | return 0; |
c906108c | 2561 | } |
c3f6f71d | 2562 | else |
c906108c | 2563 | { |
c3f6f71d JM |
2564 | #ifdef NEW_PROC_API |
2565 | struct { | |
37de36c6 | 2566 | procfs_ctl_t cmd; |
c3f6f71d JM |
2567 | /* Use char array to avoid alignment issues. */ |
2568 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2569 | } arg; | |
2570 | ||
772cf8be | 2571 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2572 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2573 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2574 | #else | |
772cf8be | 2575 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2576 | if (pi->tid == 0) |
2577 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2578 | else | |
2579 | { | |
2580 | struct { | |
2581 | long pr_count; | |
2582 | tid_t pr_error_thread; | |
2583 | tfpregset_t thread_1; | |
2584 | } thread_fpregs; | |
2585 | ||
2586 | thread_fpregs.pr_count = 1; | |
2587 | thread_fpregs.thread_1.tid = pi->tid; | |
2588 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2589 | sizeof (*fpregs)); | |
2590 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2591 | } | |
772cf8be | 2592 | # else |
c3f6f71d | 2593 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2594 | # endif |
2595 | #endif /* NEW_PROC_API */ | |
c906108c | 2596 | } |
c3f6f71d | 2597 | |
772cf8be | 2598 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2599 | pi->fpregs_valid = 0; |
2600 | return win; | |
c906108c SS |
2601 | } |
2602 | ||
77382aee PA |
2603 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2604 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2605 | |
c3f6f71d | 2606 | int |
fba45db2 | 2607 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2608 | { |
2609 | int win; | |
c906108c | 2610 | |
77382aee PA |
2611 | /* We might conceivably apply this operation to an LWP, and the |
2612 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2613 | |
c3f6f71d JM |
2614 | if (pi->ctl_fd == 0 && |
2615 | open_procinfo_files (pi, FD_CTL) == 0) | |
2616 | { | |
2617 | return 0; | |
2618 | } | |
2619 | else | |
2620 | { | |
2621 | #ifdef NEW_PROC_API | |
37de36c6 | 2622 | procfs_ctl_t cmd[2]; |
c906108c | 2623 | |
c3f6f71d JM |
2624 | cmd[0] = PCKILL; |
2625 | cmd[1] = signo; | |
2626 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2627 | #else /* ioctl method */ | |
2628 | /* FIXME: do I need the Alpha OSF fixups present in | |
2629 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2630 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2631 | #endif | |
2632 | } | |
c906108c | 2633 | |
c3f6f71d JM |
2634 | return win; |
2635 | } | |
c906108c | 2636 | |
77382aee PA |
2637 | /* Find the pid of the process that started this one. Returns the |
2638 | parent process pid, or zero. */ | |
c906108c | 2639 | |
c3f6f71d | 2640 | int |
fba45db2 | 2641 | proc_parent_pid (procinfo *pi) |
c906108c | 2642 | { |
77382aee PA |
2643 | /* We should never have to apply this operation to any procinfo |
2644 | except the one for the main process. If that ever changes for | |
2645 | any reason, then take out the following clause and replace it | |
2646 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2647 | |
c3f6f71d JM |
2648 | if (pi->tid != 0) |
2649 | pi = find_procinfo_or_die (pi->pid, 0); | |
2650 | ||
2651 | if (!pi->status_valid) | |
2652 | if (!proc_get_status (pi)) | |
2653 | return 0; | |
c5aa993b | 2654 | |
c3f6f71d JM |
2655 | return pi->prstatus.pr_ppid; |
2656 | } | |
2657 | ||
9a043c1d AC |
2658 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2659 | (a.k.a void pointer)! */ | |
2660 | ||
1ca8fce0 JB |
2661 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2662 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2663 | static void * |
2664 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2665 | { | |
4e906f53 | 2666 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2667 | void *ptr; |
2668 | ||
4e906f53 | 2669 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2670 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2671 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2672 | return ptr; |
2673 | } | |
1ca8fce0 | 2674 | #endif |
9a043c1d | 2675 | |
c3f6f71d | 2676 | int |
fba45db2 | 2677 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2678 | { |
d1a7880c PA |
2679 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2680 | /* If neither or these is defined, we can't support watchpoints. | |
2681 | This just avoids possibly failing to compile the below on such | |
2682 | systems. */ | |
c3f6f71d JM |
2683 | return 0; |
2684 | #else | |
2685 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2686 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2687 | return 0; | |
2688 | #else | |
2689 | struct { | |
37de36c6 | 2690 | procfs_ctl_t cmd; |
c3f6f71d JM |
2691 | char watch[sizeof (prwatch_t)]; |
2692 | } arg; | |
73930d4d | 2693 | prwatch_t pwatch; |
c3f6f71d | 2694 | |
9a043c1d AC |
2695 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2696 | convert a target address into something that can be stored in a | |
2697 | native data structure. */ | |
831e682e | 2698 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2699 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2700 | #else |
73930d4d | 2701 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2702 | #endif |
73930d4d KH |
2703 | pwatch.pr_size = len; |
2704 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2705 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2706 | arg.cmd = PCWATCH; | |
73930d4d | 2707 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2708 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2709 | #else | |
2710 | #if defined (PIOCSWATCH) | |
73930d4d | 2711 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2712 | #else |
2713 | return 0; /* Fail */ | |
2714 | #endif | |
2715 | #endif | |
2716 | #endif | |
2717 | #endif | |
c906108c SS |
2718 | } |
2719 | ||
965b60ee | 2720 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2721 | |
c3f6f71d | 2722 | #include <sys/sysi86.h> |
c906108c | 2723 | |
77382aee PA |
2724 | /* The KEY is actually the value of the lower 16 bits of the GS |
2725 | register for the LWP that we're interested in. Returns the | |
2726 | matching ssh struct (LDT entry). */ | |
c906108c | 2727 | |
c3f6f71d | 2728 | struct ssd * |
fba45db2 | 2729 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2730 | { |
c3f6f71d JM |
2731 | static struct ssd *ldt_entry = NULL; |
2732 | #ifdef NEW_PROC_API | |
2733 | char pathname[MAX_PROC_NAME_SIZE]; | |
2734 | struct cleanup *old_chain = NULL; | |
2735 | int fd; | |
2736 | ||
2737 | /* Allocate space for one LDT entry. | |
2738 | This alloc must persist, because we return a pointer to it. */ | |
2739 | if (ldt_entry == NULL) | |
2740 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2741 | ||
2742 | /* Open the file descriptor for the LDT table. */ | |
2743 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2744 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2745 | { |
c3f6f71d JM |
2746 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2747 | return NULL; | |
c906108c | 2748 | } |
c3f6f71d | 2749 | /* Make sure it gets closed again! */ |
004527cb | 2750 | old_chain = make_cleanup_close (fd); |
c906108c | 2751 | |
c3f6f71d JM |
2752 | /* Now 'read' thru the table, find a match and return it. */ |
2753 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2754 | { |
c3f6f71d JM |
2755 | if (ldt_entry->sel == 0 && |
2756 | ldt_entry->bo == 0 && | |
2757 | ldt_entry->acc1 == 0 && | |
2758 | ldt_entry->acc2 == 0) | |
2759 | break; /* end of table */ | |
2760 | /* If key matches, return this entry. */ | |
2761 | if (ldt_entry->sel == key) | |
2762 | return ldt_entry; | |
c906108c | 2763 | } |
c3f6f71d JM |
2764 | /* Loop ended, match not found. */ |
2765 | return NULL; | |
2766 | #else | |
2767 | int nldt, i; | |
2768 | static int nalloc = 0; | |
c906108c | 2769 | |
c3f6f71d JM |
2770 | /* Get the number of LDT entries. */ |
2771 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2772 | { |
c3f6f71d JM |
2773 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2774 | return NULL; | |
c906108c SS |
2775 | } |
2776 | ||
c3f6f71d JM |
2777 | /* Allocate space for the number of LDT entries. */ |
2778 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
2779 | if (nldt > nalloc) | |
c906108c | 2780 | { |
19958708 | 2781 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2782 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2783 | nalloc = nldt; | |
2784 | } | |
19958708 | 2785 | |
c3f6f71d JM |
2786 | /* Read the whole table in one gulp. */ |
2787 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2788 | { | |
2789 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2790 | return NULL; | |
c906108c SS |
2791 | } |
2792 | ||
c3f6f71d JM |
2793 | /* Search the table and return the (first) entry matching 'key'. */ |
2794 | for (i = 0; i < nldt; i++) | |
2795 | if (ldt_entry[i].sel == key) | |
2796 | return &ldt_entry[i]; | |
c906108c | 2797 | |
c3f6f71d JM |
2798 | /* Loop ended, match not found. */ |
2799 | return NULL; | |
2800 | #endif | |
2801 | } | |
c906108c | 2802 | |
77382aee | 2803 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2804 | |
2805 | struct ssd * | |
2806 | procfs_find_LDT_entry (ptid_t ptid) | |
2807 | { | |
2808 | gdb_gregset_t *gregs; | |
2809 | int key; | |
2810 | procinfo *pi; | |
2811 | ||
2812 | /* Find procinfo for the lwp. */ | |
2813 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
2814 | { | |
0b62613e | 2815 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2816 | PIDGET (ptid), TIDGET (ptid)); |
2817 | return NULL; | |
2818 | } | |
2819 | /* get its general registers. */ | |
2820 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
2821 | { | |
0b62613e | 2822 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2823 | PIDGET (ptid), TIDGET (ptid)); |
2824 | return NULL; | |
2825 | } | |
2826 | /* Now extract the GS register's lower 16 bits. */ | |
2827 | key = (*gregs)[GS] & 0xffff; | |
2828 | ||
2829 | /* Find the matching entry and return it. */ | |
2830 | return proc_get_LDT_entry (pi, key); | |
2831 | } | |
2832 | ||
2833 | #endif | |
c906108c | 2834 | |
c3f6f71d | 2835 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2836 | |
c3f6f71d | 2837 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2838 | |
c3f6f71d JM |
2839 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2840 | since there is a different way to do threads on every OS. */ | |
c906108c | 2841 | |
77382aee | 2842 | /* Returns the number of threads for the process. */ |
c906108c | 2843 | |
c3f6f71d | 2844 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2845 | /* OSF version */ |
19958708 | 2846 | int |
fba45db2 | 2847 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2848 | { |
2849 | int nthreads = 0; | |
c906108c | 2850 | |
c3f6f71d JM |
2851 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2852 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2853 | |
c3f6f71d | 2854 | return nthreads; |
c906108c SS |
2855 | } |
2856 | ||
c3f6f71d JM |
2857 | #else |
2858 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2859 | /* Solaris and Unixware version */ |
c3f6f71d | 2860 | int |
fba45db2 | 2861 | proc_get_nthreads (procinfo *pi) |
c906108c | 2862 | { |
c3f6f71d JM |
2863 | if (!pi->status_valid) |
2864 | if (!proc_get_status (pi)) | |
2865 | return 0; | |
c5aa993b | 2866 | |
77382aee PA |
2867 | /* NEW_PROC_API: only works for the process procinfo, because the |
2868 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2869 | #ifdef NEW_PROC_API |
c3f6f71d JM |
2870 | if (pi->tid != 0) /* find the parent process procinfo */ |
2871 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 2872 | #endif |
c3f6f71d | 2873 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2874 | } |
2875 | ||
c3f6f71d | 2876 | #else |
77382aee | 2877 | /* Default version */ |
c3f6f71d | 2878 | int |
fba45db2 | 2879 | proc_get_nthreads (procinfo *pi) |
c906108c | 2880 | { |
c3f6f71d JM |
2881 | return 0; |
2882 | } | |
2883 | #endif | |
2884 | #endif | |
2885 | ||
77382aee PA |
2886 | /* LWP version. |
2887 | ||
2888 | Return the ID of the thread that had an event of interest. | |
2889 | (ie. the one that hit a breakpoint or other traced event). All | |
2890 | other things being equal, this should be the ID of a thread that is | |
2891 | currently executing. */ | |
c3f6f71d JM |
2892 | |
2893 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2894 | /* Solaris and Unixware version */ |
c3f6f71d | 2895 | int |
fba45db2 | 2896 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2897 | { |
77382aee PA |
2898 | /* Note: this should be applied to the root procinfo for the |
2899 | process, not to the procinfo for an LWP. If applied to the | |
2900 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2901 | that case, find the parent process procinfo. */ | |
19958708 | 2902 | |
c3f6f71d JM |
2903 | if (pi->tid != 0) |
2904 | pi = find_procinfo_or_die (pi->pid, 0); | |
2905 | ||
2906 | if (!pi->status_valid) | |
2907 | if (!proc_get_status (pi)) | |
2908 | return 0; | |
2909 | ||
2910 | #ifdef NEW_PROC_API | |
2911 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2912 | #else |
c3f6f71d | 2913 | return pi->prstatus.pr_who; |
c906108c | 2914 | #endif |
c3f6f71d | 2915 | } |
c906108c | 2916 | |
c3f6f71d JM |
2917 | #else |
2918 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2919 | /* OSF version */ |
19958708 | 2920 | int |
fba45db2 | 2921 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
2922 | { |
2923 | #if 0 /* FIXME: not ready for prime time? */ | |
2924 | return pi->prstatus.pr_tid; | |
2925 | #else | |
2926 | return 0; | |
2927 | #endif | |
c906108c SS |
2928 | } |
2929 | ||
c3f6f71d | 2930 | #else |
77382aee | 2931 | /* Default version */ |
19958708 | 2932 | int |
fba45db2 | 2933 | proc_get_current_thread (procinfo *pi) |
c906108c | 2934 | { |
c3f6f71d JM |
2935 | return 0; |
2936 | } | |
2937 | ||
2938 | #endif | |
2939 | #endif | |
c906108c | 2940 | |
77382aee PA |
2941 | /* Discover the IDs of all the threads within the process, and create |
2942 | a procinfo for each of them (chained to the parent). This | |
2943 | unfortunately requires a different method on every OS. Returns | |
2944 | non-zero for success, zero for failure. */ | |
c906108c | 2945 | |
c3f6f71d | 2946 | int |
fba45db2 | 2947 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2948 | { |
2949 | if (thread && parent) /* sanity */ | |
c906108c | 2950 | { |
c3f6f71d JM |
2951 | thread->status_valid = 0; |
2952 | if (!proc_get_status (thread)) | |
2953 | destroy_one_procinfo (&parent->thread_list, thread); | |
2954 | } | |
2955 | return 0; /* keep iterating */ | |
2956 | } | |
c5aa993b | 2957 | |
c3f6f71d | 2958 | #if defined (PIOCLSTATUS) |
77382aee | 2959 | /* Solaris 2.5 (ioctl) version */ |
c3f6f71d | 2960 | int |
fba45db2 | 2961 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2962 | { |
2963 | gdb_prstatus_t *prstatus; | |
2964 | struct cleanup *old_chain = NULL; | |
2965 | procinfo *thread; | |
2966 | int nlwp, i; | |
2967 | ||
77382aee PA |
2968 | /* We should never have to apply this operation to any procinfo |
2969 | except the one for the main process. If that ever changes for | |
2970 | any reason, then take out the following clause and replace it | |
2971 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2972 | |
c3f6f71d JM |
2973 | if (pi->tid != 0) |
2974 | pi = find_procinfo_or_die (pi->pid, 0); | |
2975 | ||
2976 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2977 | ||
2978 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2979 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2980 | ||
3c37485b | 2981 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2982 | |
b8c9b27d | 2983 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2984 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2985 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2986 | ||
77382aee | 2987 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2988 | for (i = 1; i < nlwp + 1; i++) |
2989 | { | |
2990 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2991 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2992 | |
c3f6f71d JM |
2993 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2994 | thread->status_valid = 1; | |
2995 | } | |
2996 | pi->threads_valid = 1; | |
2997 | do_cleanups (old_chain); | |
2998 | return 1; | |
2999 | } | |
3000 | #else | |
3001 | #ifdef NEW_PROC_API | |
77382aee | 3002 | /* Unixware and Solaris 6 (and later) version */ |
004527cb AC |
3003 | static void |
3004 | do_closedir_cleanup (void *dir) | |
3005 | { | |
3006 | closedir (dir); | |
3007 | } | |
3008 | ||
c3f6f71d | 3009 | int |
fba45db2 | 3010 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3011 | { |
3012 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3013 | struct dirent *direntry; | |
3014 | struct cleanup *old_chain = NULL; | |
3015 | procinfo *thread; | |
3016 | DIR *dirp; | |
3017 | int lwpid; | |
3018 | ||
77382aee PA |
3019 | /* We should never have to apply this operation to any procinfo |
3020 | except the one for the main process. If that ever changes for | |
3021 | any reason, then take out the following clause and replace it | |
3022 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3023 | |
c3f6f71d JM |
3024 | if (pi->tid != 0) |
3025 | pi = find_procinfo_or_die (pi->pid, 0); | |
3026 | ||
3027 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3028 | ||
77382aee PA |
3029 | /* Unixware |
3030 | ||
3031 | Note: this brute-force method is the only way I know of to | |
3032 | accomplish this task on Unixware. This method will also work on | |
3033 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
3034 | way to do this on Solaris, but the margins of this manuscript are | |
3035 | too small to write it here... ;-) */ | |
c3f6f71d JM |
3036 | |
3037 | strcpy (pathname, pi->pathname); | |
3038 | strcat (pathname, "/lwp"); | |
3039 | if ((dirp = opendir (pathname)) == NULL) | |
3040 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3041 | ||
004527cb | 3042 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3043 | while ((direntry = readdir (dirp)) != NULL) |
3044 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3045 | { | |
3046 | lwpid = atoi (&direntry->d_name[0]); | |
3047 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3048 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3049 | } | |
3050 | pi->threads_valid = 1; | |
3051 | do_cleanups (old_chain); | |
3052 | return 1; | |
3053 | } | |
3054 | #else | |
3055 | #ifdef PIOCTLIST | |
77382aee | 3056 | /* OSF version */ |
19958708 | 3057 | int |
fba45db2 | 3058 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3059 | { |
3060 | int nthreads, i; | |
3061 | tid_t *threads; | |
3062 | ||
77382aee PA |
3063 | /* We should never have to apply this operation to any procinfo |
3064 | except the one for the main process. If that ever changes for | |
3065 | any reason, then take out the following clause and replace it | |
3066 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3067 | |
c3f6f71d JM |
3068 | if (pi->tid != 0) |
3069 | pi = find_procinfo_or_die (pi->pid, 0); | |
3070 | ||
3071 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3072 | ||
3073 | nthreads = proc_get_nthreads (pi); | |
3074 | if (nthreads < 2) | |
3075 | return 0; /* nothing to do for 1 or fewer threads */ | |
3076 | ||
3c37485b | 3077 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3078 | |
c3f6f71d JM |
3079 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3080 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3081 | ||
3082 | for (i = 0; i < nthreads; i++) | |
3083 | { | |
3084 | if (!find_procinfo (pi->pid, threads[i])) | |
3085 | if (!create_procinfo (pi->pid, threads[i])) | |
3086 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3087 | } |
c3f6f71d JM |
3088 | pi->threads_valid = 1; |
3089 | return 1; | |
c906108c | 3090 | } |
c3f6f71d | 3091 | #else |
77382aee | 3092 | /* Default version */ |
c3f6f71d | 3093 | int |
fba45db2 | 3094 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3095 | { |
3096 | return 0; | |
3097 | } | |
3098 | #endif /* OSF PIOCTLIST */ | |
3099 | #endif /* NEW_PROC_API */ | |
3100 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3101 | |
77382aee PA |
3102 | /* Given a pointer to a function, call that function once for each lwp |
3103 | in the procinfo list, until the function returns non-zero, in which | |
3104 | event return the value returned by the function. | |
3105 | ||
3106 | Note: this function does NOT call update_threads. If you want to | |
3107 | discover new threads first, you must call that function explicitly. | |
3108 | This function just makes a quick pass over the currently-known | |
3109 | procinfos. | |
3110 | ||
3111 | PI is the parent process procinfo. FUNC is the per-thread | |
3112 | function. PTR is an opaque parameter for function. Returns the | |
3113 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d JM |
3114 | |
3115 | int | |
d0849a9a KB |
3116 | proc_iterate_over_threads (procinfo *pi, |
3117 | int (*func) (procinfo *, procinfo *, void *), | |
3118 | void *ptr) | |
c906108c | 3119 | { |
c3f6f71d JM |
3120 | procinfo *thread, *next; |
3121 | int retval = 0; | |
c906108c | 3122 | |
77382aee PA |
3123 | /* We should never have to apply this operation to any procinfo |
3124 | except the one for the main process. If that ever changes for | |
3125 | any reason, then take out the following clause and replace it | |
3126 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 3127 | |
c3f6f71d JM |
3128 | if (pi->tid != 0) |
3129 | pi = find_procinfo_or_die (pi->pid, 0); | |
3130 | ||
3131 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3132 | { |
c3f6f71d JM |
3133 | next = thread->next; /* in case thread is destroyed */ |
3134 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3135 | break; | |
c906108c | 3136 | } |
c3f6f71d JM |
3137 | |
3138 | return retval; | |
c906108c SS |
3139 | } |
3140 | ||
c3f6f71d JM |
3141 | /* =================== END, Thread "MODULE" =================== */ |
3142 | ||
3143 | /* =================== END, /proc "MODULE" =================== */ | |
3144 | ||
3145 | /* =================== GDB "MODULE" =================== */ | |
3146 | ||
77382aee PA |
3147 | /* Here are all of the gdb target vector functions and their |
3148 | friends. */ | |
c3f6f71d | 3149 | |
39f77062 | 3150 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3151 | static void do_detach (int signo); |
37de36c6 | 3152 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce | 3153 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 3154 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
3155 | |
3156 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3157 | the startup phase. The following two variables are used to record | |
3158 | the address of the breakpoint, and the code that was replaced by | |
3159 | a breakpoint. */ | |
3160 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3161 | static void *dbx_link_bpt; |
c3f6f71d | 3162 | |
77382aee PA |
3163 | /* Sets up the inferior to be debugged. Registers to trace signals, |
3164 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
3165 | may want to customize that. Returns zero for success (note! | |
3166 | unlike most functions in this module); on failure, returns the LINE | |
3167 | NUMBER where it failed! */ | |
c3f6f71d JM |
3168 | |
3169 | static int | |
fba45db2 | 3170 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3171 | { |
c3f6f71d | 3172 | fltset_t traced_faults; |
37de36c6 KB |
3173 | gdb_sigset_t traced_signals; |
3174 | sysset_t *traced_syscall_entries; | |
3175 | sysset_t *traced_syscall_exits; | |
3176 | int status; | |
c906108c | 3177 | |
c3f6f71d JM |
3178 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3179 | /* On some systems (OSF), we don't trace hardware faults. | |
3180 | Apparently it's enough that we catch them as signals. | |
3181 | Wonder why we don't just do that in general? */ | |
3182 | premptyset (&traced_faults); /* don't trace faults. */ | |
3183 | #else | |
3184 | /* Register to trace hardware faults in the child. */ | |
3185 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3186 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3187 | #endif |
3188 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3189 | return __LINE__; | |
c906108c | 3190 | |
c3f6f71d JM |
3191 | /* Register to trace selected signals in the child. */ |
3192 | premptyset (&traced_signals); | |
3193 | if (!register_gdb_signals (pi, &traced_signals)) | |
3194 | return __LINE__; | |
3195 | ||
37de36c6 | 3196 | |
c3f6f71d | 3197 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3198 | traced_syscall_entries = sysset_t_alloc (pi); |
3199 | gdb_premptysysset (traced_syscall_entries); | |
3200 | #ifdef SYS_exit | |
3201 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3202 | #endif | |
c3f6f71d | 3203 | #ifdef SYS_lwpexit |
37de36c6 | 3204 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3205 | #endif |
3206 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3207 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3208 | #endif | |
3209 | #ifdef DYNAMIC_SYSCALLS | |
3210 | { | |
3211 | int callnum = find_syscall (pi, "_exit"); | |
3212 | if (callnum >= 0) | |
3213 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3214 | } | |
c906108c SS |
3215 | #endif |
3216 | ||
37de36c6 KB |
3217 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3218 | xfree (traced_syscall_entries); | |
3219 | if (!status) | |
c3f6f71d JM |
3220 | return __LINE__; |
3221 | ||
3222 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3223 | /* OSF method for tracing exec syscalls. Quoting: | |
3224 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3225 | exits from exec system calls because of the user level loader. */ | |
3226 | /* FIXME: make nice and maybe move into an access function. */ | |
3227 | { | |
3228 | int prfs_flags; | |
3229 | ||
3230 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3231 | return __LINE__; | |
3232 | ||
3233 | prfs_flags |= PRFS_STOPEXEC; | |
3234 | ||
3235 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3236 | return __LINE__; | |
3237 | } | |
3238 | #else /* not PRFS_STOPEXEC */ | |
3239 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3240 | /* GW: Rationale... | |
3241 | Not all systems with /proc have all the exec* syscalls with the same | |
3242 | names. On the SGI, for example, there is no SYS_exec, but there | |
3243 | *is* a SYS_execv. So, we try to account for that. */ | |
3244 | ||
37de36c6 KB |
3245 | traced_syscall_exits = sysset_t_alloc (pi); |
3246 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3247 | #ifdef SYS_exec |
37de36c6 | 3248 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3249 | #endif |
3250 | #ifdef SYS_execve | |
37de36c6 | 3251 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3252 | #endif |
3253 | #ifdef SYS_execv | |
37de36c6 | 3254 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3255 | #endif |
c5aa993b | 3256 | |
c3f6f71d | 3257 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3258 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3259 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3260 | #endif |
c5aa993b | 3261 | |
c3f6f71d | 3262 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3263 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3264 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3265 | #endif |
c5aa993b | 3266 | |
37de36c6 KB |
3267 | #ifdef DYNAMIC_SYSCALLS |
3268 | { | |
3269 | int callnum = find_syscall (pi, "execve"); | |
3270 | if (callnum >= 0) | |
3271 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3272 | callnum = find_syscall (pi, "ra_execve"); | |
3273 | if (callnum >= 0) | |
3274 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3275 | } | |
3276 | #endif | |
c906108c | 3277 | |
37de36c6 KB |
3278 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3279 | xfree (traced_syscall_exits); | |
3280 | if (!status) | |
c3f6f71d JM |
3281 | return __LINE__; |
3282 | ||
3283 | #endif /* PRFS_STOPEXEC */ | |
3284 | return 0; | |
c906108c SS |
3285 | } |
3286 | ||
19958708 | 3287 | static void |
136d6dae | 3288 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3289 | { |
c3f6f71d JM |
3290 | char *exec_file; |
3291 | int pid; | |
3292 | ||
74164c56 | 3293 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3294 | |
c3f6f71d | 3295 | if (pid == getpid ()) |
8a3fe4f8 | 3296 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3297 | |
c3f6f71d | 3298 | if (from_tty) |
c906108c | 3299 | { |
c3f6f71d JM |
3300 | exec_file = get_exec_file (0); |
3301 | ||
3302 | if (exec_file) | |
a3f17187 | 3303 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3304 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3305 | else |
a3f17187 | 3306 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3307 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3308 | |
3309 | fflush (stdout); | |
c906108c | 3310 | } |
39f77062 | 3311 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3312 | push_target (ops); |
c3f6f71d JM |
3313 | } |
3314 | ||
19958708 | 3315 | static void |
136d6dae | 3316 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3317 | { |
cc377e6b | 3318 | int sig = 0; |
7f9f62ba | 3319 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3320 | |
3321 | if (args) | |
3322 | sig = atoi (args); | |
c3f6f71d JM |
3323 | |
3324 | if (from_tty) | |
c906108c | 3325 | { |
cc377e6b MK |
3326 | char *exec_file; |
3327 | ||
c3f6f71d | 3328 | exec_file = get_exec_file (0); |
cc377e6b | 3329 | if (exec_file == NULL) |
c3f6f71d | 3330 | exec_file = ""; |
cc377e6b | 3331 | |
a3f17187 | 3332 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3333 | target_pid_to_str (pid_to_ptid (pid))); |
3334 | gdb_flush (gdb_stdout); | |
c906108c | 3335 | } |
19958708 | 3336 | |
cc377e6b MK |
3337 | do_detach (sig); |
3338 | ||
39f77062 | 3339 | inferior_ptid = null_ptid; |
7f9f62ba | 3340 | detach_inferior (pid); |
28439f5e | 3341 | unpush_target (ops); |
c906108c SS |
3342 | } |
3343 | ||
39f77062 KB |
3344 | static ptid_t |
3345 | do_attach (ptid_t ptid) | |
c906108c | 3346 | { |
c3f6f71d | 3347 | procinfo *pi; |
181e7f93 | 3348 | struct inferior *inf; |
c3f6f71d | 3349 | int fail; |
2689673f | 3350 | int lwpid; |
c3f6f71d | 3351 | |
39f77062 | 3352 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3353 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3354 | |
3355 | if (!open_procinfo_files (pi, FD_CTL)) | |
3356 | { | |
3357 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3358 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3359 | PIDGET (ptid)); |
c3f6f71d JM |
3360 | dead_procinfo (pi, errmsg, NOKILL); |
3361 | } | |
c906108c | 3362 | |
c3f6f71d JM |
3363 | /* Stop the process (if it isn't already stopped). */ |
3364 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3365 | { |
c3f6f71d JM |
3366 | pi->was_stopped = 1; |
3367 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3368 | } |
3369 | else | |
3370 | { | |
c3f6f71d JM |
3371 | pi->was_stopped = 0; |
3372 | /* Set the process to run again when we close it. */ | |
3373 | if (!proc_set_run_on_last_close (pi)) | |
3374 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3375 | ||
3376 | /* Now stop the process. */ | |
3377 | if (!proc_stop_process (pi)) | |
3378 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3379 | pi->ignore_next_sigstop = 1; | |
c906108c | 3380 | } |
c3f6f71d JM |
3381 | /* Save some of the /proc state to be restored if we detach. */ |
3382 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3383 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3384 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3385 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3386 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3387 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3388 | NOKILL); | |
37de36c6 | 3389 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3390 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3391 | NOKILL); |
3392 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3393 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3394 | ||
3395 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3396 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3397 | ||
6c95b8df PA |
3398 | inf = current_inferior (); |
3399 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3400 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3401 | inf->attach_flag = 1; |
2689673f PA |
3402 | |
3403 | /* Create a procinfo for the current lwp. */ | |
3404 | lwpid = proc_get_current_thread (pi); | |
3405 | create_procinfo (pi->pid, lwpid); | |
3406 | ||
3407 | /* Add it to gdb's thread list. */ | |
3408 | ptid = MERGEPID (pi->pid, lwpid); | |
3409 | add_thread (ptid); | |
3410 | ||
3411 | return ptid; | |
c906108c SS |
3412 | } |
3413 | ||
3414 | static void | |
fba45db2 | 3415 | do_detach (int signo) |
c906108c | 3416 | { |
c3f6f71d | 3417 | procinfo *pi; |
c906108c | 3418 | |
c3f6f71d | 3419 | /* Find procinfo for the main process */ |
39f77062 | 3420 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3421 | if (signo) |
3422 | if (!proc_set_current_signal (pi, signo)) | |
3423 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3424 | |
c3f6f71d JM |
3425 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3426 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3427 | |
c3f6f71d JM |
3428 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3429 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3430 | ||
37de36c6 | 3431 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3432 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3433 | ||
37de36c6 | 3434 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3435 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3436 | ||
3437 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3438 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3439 | ||
3440 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3441 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3442 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3443 | { |
3444 | /* Clear any pending signal. */ | |
3445 | if (!proc_clear_current_fault (pi)) | |
3446 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3447 | ||
1a303dec MS |
3448 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3449 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3450 | ||
c3f6f71d JM |
3451 | if (!proc_set_run_on_last_close (pi)) |
3452 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3453 | } | |
3454 | ||
c3f6f71d | 3455 | destroy_procinfo (pi); |
c906108c SS |
3456 | } |
3457 | ||
772cf8be MK |
3458 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3459 | for all registers. | |
3460 | ||
3461 | ??? Is the following note still relevant? We can't get individual | |
3462 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3463 | don't bother with caching at all in that case. | |
3464 | ||
3465 | NOTE: Since the /proc interface cannot give us individual | |
3466 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3467 | This results in the possibility that we will do unnecessarily many | |
3468 | fetches, since we may be called repeatedly for individual | |
3469 | registers. So we cache the results, and mark the cache invalid | |
3470 | when the process is resumed. */ | |
c3f6f71d | 3471 | |
c906108c | 3472 | static void |
28439f5e PA |
3473 | procfs_fetch_registers (struct target_ops *ops, |
3474 | struct regcache *regcache, int regnum) | |
c906108c | 3475 | { |
772cf8be MK |
3476 | gdb_gregset_t *gregs; |
3477 | procinfo *pi; | |
3478 | int pid = PIDGET (inferior_ptid); | |
3479 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3480 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3481 | |
2689673f | 3482 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3483 | |
3484 | if (pi == NULL) | |
8a3fe4f8 | 3485 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3486 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3487 | |
772cf8be MK |
3488 | gregs = proc_get_gregs (pi); |
3489 | if (gregs == NULL) | |
c3f6f71d JM |
3490 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3491 | ||
56be3814 | 3492 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3493 | |
40a6adc1 | 3494 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3495 | { |
772cf8be MK |
3496 | gdb_fpregset_t *fpregs; |
3497 | ||
40a6adc1 MD |
3498 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3499 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3500 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3501 | return; /* Not a floating point register. */ |
c5aa993b | 3502 | |
772cf8be MK |
3503 | fpregs = proc_get_fpregs (pi); |
3504 | if (fpregs == NULL) | |
60054393 | 3505 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3506 | |
56be3814 | 3507 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3508 | } |
c906108c SS |
3509 | } |
3510 | ||
772cf8be MK |
3511 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3512 | this for all registers. | |
3513 | ||
3514 | NOTE: Since the /proc interface will not read individual registers, | |
3515 | we will cache these requests until the process is resumed, and only | |
3516 | then write them back to the inferior process. | |
77382aee | 3517 | |
772cf8be MK |
3518 | FIXME: is that a really bad idea? Have to think about cases where |
3519 | writing one register might affect the value of others, etc. */ | |
c906108c | 3520 | |
c3f6f71d | 3521 | static void |
28439f5e PA |
3522 | procfs_store_registers (struct target_ops *ops, |
3523 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3524 | { |
772cf8be MK |
3525 | gdb_gregset_t *gregs; |
3526 | procinfo *pi; | |
3527 | int pid = PIDGET (inferior_ptid); | |
3528 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3529 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3530 | |
2689673f | 3531 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3532 | |
3533 | if (pi == NULL) | |
8a3fe4f8 | 3534 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3535 | target_pid_to_str (inferior_ptid)); |
c906108c | 3536 | |
772cf8be MK |
3537 | gregs = proc_get_gregs (pi); |
3538 | if (gregs == NULL) | |
c3f6f71d | 3539 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3540 | |
56be3814 | 3541 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3542 | if (!proc_set_gregs (pi)) |
3543 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3544 | |
40a6adc1 | 3545 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3546 | { |
772cf8be MK |
3547 | gdb_fpregset_t *fpregs; |
3548 | ||
40a6adc1 MD |
3549 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3550 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3551 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3552 | return; /* Not a floating point register. */ |
60054393 | 3553 | |
772cf8be MK |
3554 | fpregs = proc_get_fpregs (pi); |
3555 | if (fpregs == NULL) | |
60054393 MS |
3556 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3557 | ||
56be3814 | 3558 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3559 | if (!proc_set_fpregs (pi)) |
3560 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3561 | } | |
c3f6f71d | 3562 | } |
c906108c | 3563 | |
37de36c6 KB |
3564 | static int |
3565 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3566 | { | |
3567 | ||
3568 | #ifdef SYS_lwp_exit | |
3569 | if (scall == SYS_lwp_exit) | |
3570 | return 1; | |
3571 | #endif | |
3572 | #ifdef SYS_lwpexit | |
3573 | if (scall == SYS_lwpexit) | |
3574 | return 1; | |
3575 | #endif | |
3576 | return 0; | |
3577 | } | |
3578 | ||
3579 | static int | |
3580 | syscall_is_exit (procinfo *pi, int scall) | |
3581 | { | |
3582 | #ifdef SYS_exit | |
3583 | if (scall == SYS_exit) | |
3584 | return 1; | |
3585 | #endif | |
3586 | #ifdef DYNAMIC_SYSCALLS | |
3587 | if (find_syscall (pi, "_exit") == scall) | |
3588 | return 1; | |
3589 | #endif | |
3590 | return 0; | |
3591 | } | |
3592 | ||
3593 | static int | |
3594 | syscall_is_exec (procinfo *pi, int scall) | |
3595 | { | |
3596 | #ifdef SYS_exec | |
3597 | if (scall == SYS_exec) | |
3598 | return 1; | |
3599 | #endif | |
3600 | #ifdef SYS_execv | |
3601 | if (scall == SYS_execv) | |
3602 | return 1; | |
3603 | #endif | |
3604 | #ifdef SYS_execve | |
3605 | if (scall == SYS_execve) | |
3606 | return 1; | |
3607 | #endif | |
3608 | #ifdef DYNAMIC_SYSCALLS | |
3609 | if (find_syscall (pi, "_execve")) | |
3610 | return 1; | |
3611 | if (find_syscall (pi, "ra_execve")) | |
3612 | return 1; | |
3613 | #endif | |
3614 | return 0; | |
3615 | } | |
3616 | ||
3617 | static int | |
3618 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3619 | { | |
3620 | #ifdef SYS_lwp_create | |
3621 | if (scall == SYS_lwp_create) | |
3622 | return 1; | |
3623 | #endif | |
3624 | #ifdef SYS_lwpcreate | |
3625 | if (scall == SYS_lwpcreate) | |
3626 | return 1; | |
3627 | #endif | |
3628 | return 0; | |
3629 | } | |
3630 | ||
7434dadd JB |
3631 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3632 | Does nothing if the breakpoint hasn't been inserted or has already | |
3633 | been removed. */ | |
3634 | ||
3635 | static void | |
3636 | remove_dbx_link_breakpoint (void) | |
3637 | { | |
3638 | if (dbx_link_bpt_addr == 0) | |
3639 | return; | |
3640 | ||
3641 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3642 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3643 | ||
3644 | dbx_link_bpt_addr = 0; | |
3645 | dbx_link_bpt = NULL; | |
3646 | } | |
3647 | ||
3648 | #ifdef SYS_syssgi | |
3649 | /* Return the address of the __dbx_link() function in the file | |
3650 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3651 | the symbol was not found. */ | |
3652 | ||
3653 | static CORE_ADDR | |
3654 | dbx_link_addr (bfd *abfd) | |
3655 | { | |
3656 | long storage_needed; | |
3657 | asymbol **symbol_table; | |
3658 | long number_of_symbols; | |
3659 | long i; | |
3660 | ||
3661 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3662 | if (storage_needed <= 0) | |
3663 | return 0; | |
3664 | ||
3665 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3666 | make_cleanup (xfree, symbol_table); | |
3667 | ||
3668 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3669 | ||
3670 | for (i = 0; i < number_of_symbols; i++) | |
3671 | { | |
3672 | asymbol *sym = symbol_table[i]; | |
3673 | ||
3674 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3675 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3676 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3677 | } |
3678 | ||
3679 | /* Symbol not found, return NULL. */ | |
3680 | return 0; | |
3681 | } | |
3682 | ||
3683 | /* Search the symbol table of the file referenced by FD for a symbol | |
3684 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
3685 | and return nonzero. Return zero otherwise. */ | |
3686 | ||
3687 | static int | |
3688 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3689 | { | |
3690 | bfd *abfd; | |
3691 | long storage_needed; | |
3692 | CORE_ADDR sym_addr; | |
3693 | ||
3694 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
3695 | if (abfd == NULL) | |
3696 | { | |
3697 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3698 | return 0; | |
3699 | } | |
3700 | ||
3701 | if (!bfd_check_format (abfd, bfd_object)) | |
3702 | { | |
3703 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3704 | symbol in it. */ |
7434dadd JB |
3705 | bfd_close (abfd); |
3706 | return 0; | |
3707 | } | |
3708 | ||
3709 | sym_addr = dbx_link_addr (abfd); | |
3710 | if (sym_addr != 0) | |
3711 | { | |
3712 | /* Insert the breakpoint. */ | |
3713 | dbx_link_bpt_addr = sym_addr; | |
3714 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3715 | sym_addr); | |
3716 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3717 | { |
3718 | warning (_("Failed to insert dbx_link breakpoint.")); | |
3719 | bfd_close (abfd); | |
3720 | return 0; | |
3721 | } | |
7434dadd JB |
3722 | bfd_close (abfd); |
3723 | return 1; | |
3724 | } | |
3725 | ||
3726 | bfd_close (abfd); | |
3727 | return 0; | |
3728 | } | |
3729 | ||
e294797a | 3730 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3731 | space in the process. The callback function receives an open file |
3732 | descriptor for the file corresponding to that mapped address space | |
3733 | (if there is one), and the base address of the mapped space. Quit | |
3734 | when the callback function returns a nonzero value, or at teh end | |
3735 | of the mappings. Returns the first non-zero return value of the | |
3736 | callback function, or zero. */ | |
e294797a JB |
3737 | |
3738 | static int | |
3739 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3740 | void *data) | |
3741 | { | |
3742 | procinfo *pi = data; | |
3743 | int fd; | |
3744 | ||
3745 | #ifdef NEW_PROC_API | |
3746 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3747 | ||
3748 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3749 | return -1; /* sanity */ | |
3750 | ||
3751 | if (map->pr_mapname[0] == 0) | |
3752 | { | |
3753 | fd = -1; /* no map file */ | |
3754 | } | |
3755 | else | |
3756 | { | |
3757 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3758 | /* Note: caller's responsibility to close this fd! */ | |
3759 | fd = open_with_retry (name, O_RDONLY); | |
3760 | /* Note: we don't test the above call for failure; | |
3761 | we just pass the FD on as given. Sometimes there is | |
3762 | no file, so the open may return failure, but that's | |
3763 | not a problem. */ | |
3764 | } | |
3765 | #else | |
3766 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3767 | /* Note: we don't test the above call for failure; | |
3768 | we just pass the FD on as given. Sometimes there is | |
3769 | no file, so the ioctl may return failure, but that's | |
3770 | not a problem. */ | |
3771 | #endif | |
3772 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3773 | } | |
3774 | ||
7434dadd JB |
3775 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3776 | insert a breakpoint at this location and return nonzero. Return | |
3777 | zero otherwise. */ | |
3778 | ||
3779 | static int | |
3780 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
77382aee PA |
3781 | iterate_over_mappings_cb_ftype *child_func, |
3782 | void *data) | |
7434dadd JB |
3783 | { |
3784 | procinfo *pi = (procinfo *) data; | |
3785 | ||
3786 | /* We know the symbol we're looking for is in a text region, so | |
3787 | only look for it if the region is a text one. */ | |
3788 | if (map->pr_mflags & MA_EXEC) | |
3789 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3790 | ||
3791 | return 0; | |
3792 | } | |
3793 | ||
3794 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3795 | insert a breakpoint at its location, and return nonzero. Return zero | |
3796 | otherwise. */ | |
3797 | ||
3798 | static int | |
3799 | insert_dbx_link_breakpoint (procinfo *pi) | |
3800 | { | |
3801 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3802 | } | |
3803 | #endif | |
3804 | ||
77382aee PA |
3805 | /* Retrieve the next stop event from the child process. If child has |
3806 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3807 | (or possibly wait eventcodes) into gdb internal event codes. | |
3808 | Returns the id of process (and possibly thread) that incurred the | |
3809 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3810 | |
39f77062 | 3811 | static ptid_t |
117de6a9 | 3812 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3813 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3814 | { |
c3f6f71d JM |
3815 | /* First cut: loosely based on original version 2.1 */ |
3816 | procinfo *pi; | |
39f77062 KB |
3817 | int wstat; |
3818 | int temp_tid; | |
3819 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3820 | int why, what, flags; |
3821 | int retry = 0; | |
c906108c | 3822 | |
c3f6f71d | 3823 | wait_again: |
c906108c | 3824 | |
c3f6f71d JM |
3825 | retry++; |
3826 | wstat = 0; | |
39f77062 | 3827 | retval = pid_to_ptid (-1); |
c906108c | 3828 | |
c3f6f71d | 3829 | /* Find procinfo for main process */ |
39f77062 | 3830 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3831 | if (pi) |
c906108c | 3832 | { |
c3f6f71d JM |
3833 | /* We must assume that the status is stale now... */ |
3834 | pi->status_valid = 0; | |
3835 | pi->gregs_valid = 0; | |
3836 | pi->fpregs_valid = 0; | |
3837 | ||
3838 | #if 0 /* just try this out... */ | |
3839 | flags = proc_flags (pi); | |
3840 | why = proc_why (pi); | |
3841 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
3842 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
3843 | #endif | |
3844 | /* If child is not stopped, wait for it to stop. */ | |
3845 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3846 | !proc_wait_for_stop (pi)) | |
c906108c | 3847 | { |
c3f6f71d JM |
3848 | /* wait_for_stop failed: has the child terminated? */ |
3849 | if (errno == ENOENT) | |
c906108c | 3850 | { |
39f77062 KB |
3851 | int wait_retval; |
3852 | ||
c3f6f71d | 3853 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 3854 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 3855 | |
39f77062 | 3856 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 3857 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 3858 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
3859 | /* FIXME: might I not just use waitpid? |
3860 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 3861 | retval = pid_to_ptid (wait_retval); |
c906108c | 3862 | } |
d1566ff5 FN |
3863 | else if (errno == EINTR) |
3864 | goto wait_again; | |
c3f6f71d | 3865 | else |
c906108c | 3866 | { |
c3f6f71d JM |
3867 | /* Unknown error from wait_for_stop. */ |
3868 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 3869 | } |
c3f6f71d JM |
3870 | } |
3871 | else | |
3872 | { | |
3873 | /* This long block is reached if either: | |
3874 | a) the child was already stopped, or | |
3875 | b) we successfully waited for the child with wait_for_stop. | |
3876 | This block will analyze the /proc status, and translate it | |
3877 | into a waitstatus for GDB. | |
3878 | ||
3879 | If we actually had to call wait because the /proc file | |
19958708 | 3880 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3881 | because we already have a waitstatus. */ |
3882 | ||
3883 | flags = proc_flags (pi); | |
3884 | why = proc_why (pi); | |
3885 | what = proc_what (pi); | |
3886 | ||
c3f6f71d | 3887 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3888 | { |
c3f6f71d JM |
3889 | #ifdef PR_ASYNC |
3890 | /* If it's running async (for single_thread control), | |
3891 | set it back to normal again. */ | |
3892 | if (flags & PR_ASYNC) | |
3893 | if (!proc_unset_async (pi)) | |
3894 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3895 | #endif | |
3896 | ||
3897 | if (info_verbose) | |
3898 | proc_prettyprint_why (why, what, 1); | |
3899 | ||
3900 | /* The 'pid' we will return to GDB is composed of | |
3901 | the process ID plus the lwp ID. */ | |
3902 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3903 | ||
3904 | switch (why) { | |
3905 | case PR_SIGNALLED: | |
3906 | wstat = (what << 8) | 0177; | |
3907 | break; | |
3908 | case PR_SYSENTRY: | |
37de36c6 | 3909 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3910 | { |
17faa917 DJ |
3911 | if (print_thread_events) |
3912 | printf_unfiltered (_("[%s exited]\n"), | |
3913 | target_pid_to_str (retval)); | |
37de36c6 KB |
3914 | delete_thread (retval); |
3915 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3916 | return retval; | |
3917 | } | |
3918 | else if (syscall_is_exit (pi, what)) | |
3919 | { | |
181e7f93 PA |
3920 | struct inferior *inf; |
3921 | ||
37de36c6 KB |
3922 | /* Handle SYS_exit call only */ |
3923 | /* Stopped at entry to SYS_exit. | |
19958708 | 3924 | Make it runnable, resume it, then use |
37de36c6 | 3925 | the wait system call to get its exit code. |
19958708 | 3926 | Proc_run_process always clears the current |
37de36c6 KB |
3927 | fault and signal. |
3928 | Then return its exit status. */ | |
3929 | pi->status_valid = 0; | |
3930 | wstat = 0; | |
19958708 | 3931 | /* FIXME: what we should do is return |
37de36c6 KB |
3932 | TARGET_WAITKIND_SPURIOUS. */ |
3933 | if (!proc_run_process (pi, 0, 0)) | |
3934 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3935 | |
3936 | inf = find_inferior_pid (pi->pid); | |
3937 | if (inf->attach_flag) | |
c3f6f71d | 3938 | { |
19958708 | 3939 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3940 | return a "success" exit code. Bogus: what if |
3941 | it returns something else? */ | |
3942 | wstat = 0; | |
39f77062 | 3943 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3944 | } |
3945 | else | |
3946 | { | |
3947 | int temp = wait (&wstat); | |
3948 | ||
3949 | /* FIXME: shouldn't I make sure I get the right | |
3950 | event from the right process? If (for | |
3951 | instance) I have killed an earlier inferior | |
3952 | process but failed to clean up after it | |
3953 | somehow, I could get its termination event | |
3954 | here. */ | |
3955 | ||
3956 | /* If wait returns -1, that's what we return to GDB. */ | |
3957 | if (temp < 0) | |
39f77062 | 3958 | retval = pid_to_ptid (temp); |
c3f6f71d | 3959 | } |
c3f6f71d | 3960 | } |
37de36c6 KB |
3961 | else |
3962 | { | |
a3f17187 | 3963 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3964 | proc_prettyprint_syscall (proc_what (pi), 0); |
3965 | printf_filtered ("\n"); | |
3966 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3967 | { |
37de36c6 | 3968 | long i, nsysargs, *sysargs; |
c3f6f71d | 3969 | |
37de36c6 KB |
3970 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3971 | (sysargs = proc_sysargs (pi)) != NULL) | |
3972 | { | |
a3f17187 | 3973 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 3974 | for (i = 0; i < nsysargs; i++) |
19958708 | 3975 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3976 | i, sysargs[i]); |
3977 | } | |
c3f6f71d | 3978 | |
c3f6f71d | 3979 | } |
c3f6f71d | 3980 | #endif |
37de36c6 KB |
3981 | if (status) |
3982 | { | |
3983 | /* How to exit gracefully, returning "unknown event" */ | |
3984 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 3985 | return inferior_ptid; |
37de36c6 KB |
3986 | } |
3987 | else | |
3988 | { | |
3989 | /* How to keep going without returning to wfi: */ | |
39f77062 | 3990 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
3991 | goto wait_again; |
3992 | } | |
3993 | } | |
3994 | break; | |
3995 | case PR_SYSEXIT: | |
3996 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3997 | { |
37de36c6 KB |
3998 | /* Hopefully this is our own "fork-child" execing |
3999 | the real child. Hoax this event into a trap, and | |
4000 | GDB will see the child about to execute its start | |
4001 | address. */ | |
4002 | wstat = (SIGTRAP << 8) | 0177; | |
4003 | } | |
9185ddce | 4004 | #ifdef SYS_syssgi |
77382aee PA |
4005 | else if (what == SYS_syssgi) |
4006 | { | |
4007 | /* see if we can break on dbx_link(). If yes, then | |
4008 | we no longer need the SYS_syssgi notifications. */ | |
4009 | if (insert_dbx_link_breakpoint (pi)) | |
4010 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4011 | FLAG_RESET, 0); | |
4012 | ||
4013 | /* This is an internal event and should be transparent | |
4014 | to wfi, so resume the execution and wait again. See | |
4015 | comment in procfs_init_inferior() for more details. */ | |
4016 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4017 | goto wait_again; | |
4018 | } | |
9185ddce | 4019 | #endif |
37de36c6 KB |
4020 | else if (syscall_is_lwp_create (pi, what)) |
4021 | { | |
77382aee PA |
4022 | /* This syscall is somewhat like fork/exec. We |
4023 | will get the event twice: once for the parent | |
4024 | LWP, and once for the child. We should already | |
4025 | know about the parent LWP, but the child will | |
4026 | be new to us. So, whenever we get this event, | |
4027 | if it represents a new thread, simply add the | |
4028 | thread to the list. */ | |
c3f6f71d | 4029 | |
37de36c6 | 4030 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4031 | temp_tid = proc_get_current_thread (pi); |
4032 | if (!find_procinfo (pi->pid, temp_tid)) | |
4033 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4034 | |
39f77062 | 4035 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4036 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4037 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4038 | add_thread (temp_ptid); |
4039 | ||
37de36c6 KB |
4040 | /* Return to WFI, but tell it to immediately resume. */ |
4041 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4042 | return inferior_ptid; |
37de36c6 KB |
4043 | } |
4044 | else if (syscall_is_lwp_exit (pi, what)) | |
4045 | { | |
17faa917 DJ |
4046 | if (print_thread_events) |
4047 | printf_unfiltered (_("[%s exited]\n"), | |
4048 | target_pid_to_str (retval)); | |
37de36c6 KB |
4049 | delete_thread (retval); |
4050 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4051 | return retval; | |
c3f6f71d | 4052 | } |
37de36c6 KB |
4053 | else if (0) |
4054 | { | |
4055 | /* FIXME: Do we need to handle SYS_sproc, | |
4056 | SYS_fork, or SYS_vfork here? The old procfs | |
4057 | seemed to use this event to handle threads on | |
4058 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4059 | that threads were actually separate processes. |
37de36c6 KB |
4060 | Irix, maybe? Anyway, low priority for now. */ |
4061 | } | |
4062 | else | |
4063 | { | |
a3f17187 | 4064 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4065 | proc_prettyprint_syscall (proc_what (pi), 0); |
4066 | printf_filtered ("\n"); | |
4067 | #ifndef PIOCSSPCACT | |
4068 | { | |
4069 | long i, nsysargs, *sysargs; | |
4070 | ||
4071 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4072 | (sysargs = proc_sysargs (pi)) != NULL) | |
4073 | { | |
77382aee PA |
4074 | printf_filtered (_("%ld syscall arguments:\n"), |
4075 | nsysargs); | |
37de36c6 | 4076 | for (i = 0; i < nsysargs; i++) |
19958708 | 4077 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4078 | i, sysargs[i]); |
4079 | } | |
4080 | } | |
c3f6f71d | 4081 | #endif |
37de36c6 | 4082 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4083 | return inferior_ptid; |
37de36c6 | 4084 | } |
c3f6f71d JM |
4085 | break; |
4086 | case PR_REQUESTED: | |
4087 | #if 0 /* FIXME */ | |
4088 | wstat = (SIGSTOP << 8) | 0177; | |
4089 | break; | |
4090 | #else | |
4091 | if (retry < 5) | |
4092 | { | |
a3f17187 | 4093 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4094 | pi->status_valid = 0; |
4095 | goto wait_again; | |
4096 | } | |
4097 | else | |
4098 | { | |
4099 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4100 | temp_tid = proc_get_current_thread (pi); |
4101 | if (!find_procinfo (pi->pid, temp_tid)) | |
4102 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4103 | |
4104 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4105 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4106 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4107 | add_thread (temp_ptid); |
c3f6f71d JM |
4108 | |
4109 | status->kind = TARGET_WAITKIND_STOPPED; | |
4110 | status->value.sig = 0; | |
4111 | return retval; | |
4112 | } | |
4113 | #endif | |
4114 | case PR_JOBCONTROL: | |
4115 | wstat = (what << 8) | 0177; | |
4116 | break; | |
4117 | case PR_FAULTED: | |
7af6341f | 4118 | switch (what) { |
c3f6f71d JM |
4119 | #ifdef FLTWATCH |
4120 | case FLTWATCH: | |
4121 | wstat = (SIGTRAP << 8) | 0177; | |
4122 | break; | |
4123 | #endif | |
4124 | #ifdef FLTKWATCH | |
4125 | case FLTKWATCH: | |
4126 | wstat = (SIGTRAP << 8) | 0177; | |
4127 | break; | |
4128 | #endif | |
4129 | /* FIXME: use si_signo where possible. */ | |
4130 | case FLTPRIV: | |
4131 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4132 | case FLTILL: | |
4133 | #endif | |
4134 | wstat = (SIGILL << 8) | 0177; | |
4135 | break; | |
4136 | case FLTBPT: | |
4137 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4138 | case FLTTRACE: | |
4139 | #endif | |
77382aee PA |
4140 | /* If we hit our __dbx_link() internal breakpoint, |
4141 | then remove it. See comments in procfs_init_inferior() | |
4142 | for more details. */ | |
4143 | if (dbx_link_bpt_addr != 0 | |
4144 | && dbx_link_bpt_addr | |
fb14de7b | 4145 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 4146 | remove_dbx_link_breakpoint (); |
9185ddce | 4147 | |
c3f6f71d JM |
4148 | wstat = (SIGTRAP << 8) | 0177; |
4149 | break; | |
4150 | case FLTSTACK: | |
4151 | case FLTACCESS: | |
4152 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4153 | case FLTBOUNDS: | |
4154 | #endif | |
4155 | wstat = (SIGSEGV << 8) | 0177; | |
4156 | break; | |
4157 | case FLTIOVF: | |
4158 | case FLTIZDIV: | |
4159 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4160 | case FLTFPE: | |
4161 | #endif | |
4162 | wstat = (SIGFPE << 8) | 0177; | |
4163 | break; | |
4164 | case FLTPAGE: /* Recoverable page fault */ | |
4165 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4166 | retval = pid_to_ptid (-1); |
c3f6f71d | 4167 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4168 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4169 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4170 | error (_("... giving up...")); |
c3f6f71d JM |
4171 | break; |
4172 | } | |
4173 | break; /* case PR_FAULTED: */ | |
4174 | default: /* switch (why) unmatched */ | |
4175 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4176 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4177 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4178 | error (_("... giving up...")); |
c3f6f71d JM |
4179 | break; |
4180 | } | |
77382aee PA |
4181 | /* Got this far without error: If retval isn't in the |
4182 | threads database, add it. */ | |
39f77062 KB |
4183 | if (PIDGET (retval) > 0 && |
4184 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4185 | !in_thread_list (retval)) |
c906108c | 4186 | { |
77382aee PA |
4187 | /* We have a new thread. We need to add it both to |
4188 | GDB's list and to our own. If we don't create a | |
4189 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
4190 | add_thread (retval); |
4191 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4192 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4193 | } |
c906108c | 4194 | } |
c3f6f71d | 4195 | else /* flags do not indicate STOPPED */ |
c906108c | 4196 | { |
c3f6f71d JM |
4197 | /* surely this can't happen... */ |
4198 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4199 | __LINE__); | |
4200 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4201 | error (_("procfs: ...giving up...")); |
c906108c | 4202 | } |
c906108c | 4203 | } |
c906108c | 4204 | |
c3f6f71d JM |
4205 | if (status) |
4206 | store_waitstatus (status, wstat); | |
c906108c SS |
4207 | } |
4208 | ||
c3f6f71d JM |
4209 | return retval; |
4210 | } | |
c906108c | 4211 | |
4e73f23d RM |
4212 | /* Perform a partial transfer to/from the specified object. For |
4213 | memory transfers, fall back to the old memory xfer functions. */ | |
4214 | ||
4215 | static LONGEST | |
4216 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4217 | const char *annex, gdb_byte *readbuf, |
4218 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4219 | { |
4220 | switch (object) | |
4221 | { | |
4222 | case TARGET_OBJECT_MEMORY: | |
4223 | if (readbuf) | |
0b62613e PA |
4224 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4225 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4226 | if (writebuf) |
0b62613e PA |
4227 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4228 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4229 | return -1; |
4230 | ||
4231 | #ifdef NEW_PROC_API | |
4232 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4233 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4234 | offset, len); |
4235 | #endif | |
4236 | ||
4237 | default: | |
4238 | if (ops->beneath != NULL) | |
4239 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4240 | readbuf, writebuf, offset, len); | |
4241 | return -1; | |
4242 | } | |
4243 | } | |
4244 | ||
4245 | ||
d0849a9a KB |
4246 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4247 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4248 | otherwise transfer them from the target. TARGET is unused. | |
4249 | ||
4250 | The return value is 0 if an error occurred or no bytes were | |
4251 | transferred. Otherwise, it will be a positive value which | |
4252 | indicates the number of bytes transferred between gdb and the | |
4253 | target. (Note that the interface also makes provisions for | |
4254 | negative values, but this capability isn't implemented here.) */ | |
4255 | ||
c3f6f71d | 4256 | static int |
0b62613e | 4257 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4258 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4259 | { |
4260 | procinfo *pi; | |
4261 | int nbytes = 0; | |
c906108c | 4262 | |
c3f6f71d | 4263 | /* Find procinfo for main process */ |
39f77062 | 4264 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4265 | if (pi->as_fd == 0 && |
4266 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4267 | { |
c3f6f71d JM |
4268 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4269 | return 0; | |
c906108c | 4270 | } |
c906108c | 4271 | |
c3f6f71d | 4272 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4273 | { |
c3f6f71d | 4274 | if (dowrite) |
c906108c | 4275 | { |
c3f6f71d JM |
4276 | #ifdef NEW_PROC_API |
4277 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4278 | #else |
c3f6f71d | 4279 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4280 | #endif |
c3f6f71d | 4281 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4282 | } |
c3f6f71d | 4283 | else |
c906108c | 4284 | { |
c3f6f71d JM |
4285 | PROCFS_NOTE ("read memory: \n"); |
4286 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4287 | } |
c3f6f71d | 4288 | if (nbytes < 0) |
c906108c | 4289 | { |
c3f6f71d | 4290 | nbytes = 0; |
c906108c | 4291 | } |
c906108c | 4292 | } |
c3f6f71d | 4293 | return nbytes; |
c906108c SS |
4294 | } |
4295 | ||
77382aee PA |
4296 | /* Called by target_resume before making child runnable. Mark cached |
4297 | registers and status's invalid. If there are "dirty" caches that | |
4298 | need to be written back to the child process, do that. | |
c906108c | 4299 | |
77382aee PA |
4300 | File descriptors are also cached. As they are a limited resource, |
4301 | we cannot hold onto them indefinitely. However, as they are | |
4302 | expensive to open, we don't want to throw them away | |
4303 | indescriminately either. As a compromise, we will keep the file | |
4304 | descriptors for the parent process, but discard any file | |
4305 | descriptors we may have accumulated for the threads. | |
4306 | ||
4307 | As this function is called by iterate_over_threads, it always | |
4308 | returns zero (so that iterate_over_threads will keep | |
4309 | iterating). */ | |
c3f6f71d JM |
4310 | |
4311 | static int | |
fba45db2 | 4312 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4313 | { |
77382aee PA |
4314 | /* About to run the child; invalidate caches and do any other |
4315 | cleanup. */ | |
c906108c | 4316 | |
c3f6f71d JM |
4317 | #if 0 |
4318 | if (pi->gregs_dirty) | |
4319 | if (parent == NULL || | |
4320 | proc_get_current_thread (parent) != pi->tid) | |
4321 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4322 | proc_warn (pi, "target_resume, set_gregs", | |
4323 | __LINE__); | |
a97b0ac8 | 4324 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4325 | if (pi->fpregs_dirty) |
4326 | if (parent == NULL || | |
4327 | proc_get_current_thread (parent) != pi->tid) | |
4328 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4329 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4330 | __LINE__); |
c906108c | 4331 | #endif |
c906108c | 4332 | |
c3f6f71d | 4333 | if (parent != NULL) |
c906108c | 4334 | { |
c3f6f71d | 4335 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4336 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4337 | We don't do this to the master (parent) procinfo. */ |
4338 | ||
4339 | close_procinfo_files (pi); | |
c906108c | 4340 | } |
c3f6f71d JM |
4341 | pi->gregs_valid = 0; |
4342 | pi->fpregs_valid = 0; | |
4343 | #if 0 | |
4344 | pi->gregs_dirty = 0; | |
4345 | pi->fpregs_dirty = 0; | |
c906108c | 4346 | #endif |
c3f6f71d JM |
4347 | pi->status_valid = 0; |
4348 | pi->threads_valid = 0; | |
c906108c | 4349 | |
c3f6f71d | 4350 | return 0; |
c906108c SS |
4351 | } |
4352 | ||
0fda6bd2 | 4353 | #if 0 |
77382aee PA |
4354 | /* A callback function for iterate_over_threads. Find the |
4355 | asynchronous signal thread, and make it runnable. See if that | |
4356 | helps matters any. */ | |
c906108c | 4357 | |
c3f6f71d | 4358 | static int |
fba45db2 | 4359 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4360 | { |
c3f6f71d JM |
4361 | #ifdef PR_ASLWP |
4362 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4363 | { |
c3f6f71d JM |
4364 | if (!proc_run_process (pi, 0, -1)) |
4365 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4366 | return 1; | |
c906108c | 4367 | } |
c906108c | 4368 | #endif |
c3f6f71d | 4369 | return 0; |
c906108c | 4370 | } |
0fda6bd2 | 4371 | #endif |
c906108c | 4372 | |
77382aee PA |
4373 | /* Make the child process runnable. Normally we will then call |
4374 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4375 | ||
4376 | If STEP is true, then arrange for the child to stop again after | |
4377 | executing a single instruction. If SIGNO is zero, then cancel any | |
4378 | pending signal; if non-zero, then arrange for the indicated signal | |
4379 | to be delivered to the child when it runs. If PID is -1, then | |
4380 | allow any child thread to run; if non-zero, then allow only the | |
4381 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4382 | |
4383 | static void | |
28439f5e PA |
4384 | procfs_resume (struct target_ops *ops, |
4385 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4386 | { |
c3f6f71d JM |
4387 | procinfo *pi, *thread; |
4388 | int native_signo; | |
4389 | ||
19958708 | 4390 | /* 2.1: |
c3f6f71d | 4391 | prrun.prflags |= PRSVADDR; |
19958708 | 4392 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4393 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4394 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4395 | prrun.prflags |= PRCFAULT; clear current fault. |
4396 | ||
4397 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4398 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4399 | PRSVADDR is unnecessary. |
4400 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4401 | This basically leaves PRSTEP and PRCSIG. | |
4402 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4403 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4404 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d JM |
4405 | |
4406 | /* Find procinfo for main process */ | |
39f77062 | 4407 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4408 | |
77382aee | 4409 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4410 | errno = 0; |
c906108c | 4411 | |
c3f6f71d JM |
4412 | /* Convert signal to host numbering. */ |
4413 | if (signo == 0 || | |
0fda6bd2 | 4414 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4415 | native_signo = 0; |
4416 | else | |
4417 | native_signo = target_signal_to_host (signo); | |
c906108c | 4418 | |
c3f6f71d | 4419 | pi->ignore_next_sigstop = 0; |
c906108c | 4420 | |
77382aee PA |
4421 | /* Running the process voids all cached registers and status. */ |
4422 | /* Void the threads' caches first. */ | |
19958708 | 4423 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4424 | /* Void the process procinfo's caches. */ |
4425 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4426 | |
39f77062 | 4427 | if (PIDGET (ptid) != -1) |
c906108c | 4428 | { |
77382aee PA |
4429 | /* Resume a specific thread, presumably suppressing the |
4430 | others. */ | |
39f77062 | 4431 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4432 | if (thread != NULL) |
c906108c | 4433 | { |
c3f6f71d JM |
4434 | if (thread->tid != 0) |
4435 | { | |
77382aee PA |
4436 | /* We're to resume a specific thread, and not the |
4437 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4438 | #ifdef PR_ASYNC |
4439 | if (!proc_set_async (pi)) | |
4440 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4441 | #endif | |
4442 | #if 0 | |
19958708 | 4443 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4444 | make_signal_thread_runnable, |
4445 | NULL); | |
4446 | #endif | |
4447 | pi = thread; /* substitute the thread's procinfo for run */ | |
4448 | } | |
c906108c SS |
4449 | } |
4450 | } | |
c906108c | 4451 | |
c3f6f71d | 4452 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4453 | { |
c3f6f71d | 4454 | if (errno == EBUSY) |
77382aee PA |
4455 | warning (_("resume: target already running. " |
4456 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4457 | else |
4458 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4459 | } |
c3f6f71d | 4460 | } |
c906108c | 4461 | |
77382aee PA |
4462 | /* Traverse the list of signals that GDB knows about (see "handle" |
4463 | command), and arrange for the target to be stopped or not, | |
4464 | according to these settings. Returns non-zero for success, zero | |
4465 | for failure. */ | |
c906108c | 4466 | |
c3f6f71d | 4467 | static int |
37de36c6 | 4468 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4469 | { |
4470 | int signo; | |
c906108c | 4471 | |
c3f6f71d JM |
4472 | for (signo = 0; signo < NSIG; signo ++) |
4473 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4474 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4475 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
3c95f01c | 4476 | gdb_prdelset (signals, signo); |
c3f6f71d | 4477 | else |
3c95f01c | 4478 | gdb_praddset (signals, signo); |
c906108c | 4479 | |
c3f6f71d | 4480 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4481 | } |
4482 | ||
77382aee | 4483 | /* Set up to trace signals in the child process. */ |
c906108c | 4484 | |
c3f6f71d | 4485 | static void |
39f77062 | 4486 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4487 | { |
37de36c6 | 4488 | gdb_sigset_t signals; |
39f77062 | 4489 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4490 | |
c3f6f71d JM |
4491 | if (proc_get_traced_signals (pi, &signals) && |
4492 | register_gdb_signals (pi, &signals)) | |
4493 | return; | |
4494 | else | |
4495 | proc_error (pi, "notice_signals", __LINE__); | |
4496 | } | |
c906108c | 4497 | |
77382aee | 4498 | /* Print status information about the child process. */ |
c906108c | 4499 | |
c3f6f71d | 4500 | static void |
fba45db2 | 4501 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4502 | { |
181e7f93 | 4503 | struct inferior *inf = current_inferior (); |
a3f17187 | 4504 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4505 | inf->attach_flag? "attached": "child", |
39f77062 | 4506 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4507 | } |
c906108c | 4508 | |
77382aee PA |
4509 | /* Stop the child process asynchronously, as when the gdb user types |
4510 | control-c or presses a "stop" button. Works by sending | |
4511 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4512 | |
c3f6f71d | 4513 | static void |
f9c72d52 | 4514 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4515 | { |
7e1789f5 | 4516 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4517 | } |
4518 | ||
77382aee PA |
4519 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4520 | should only be applied to the real process, not to an LWP, because | |
4521 | of the check for parent-process. If we need this to work for an | |
4522 | LWP, it needs some more logic. */ | |
c906108c | 4523 | |
c3f6f71d | 4524 | static void |
fba45db2 | 4525 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4526 | { |
4527 | int parent_pid; | |
c906108c | 4528 | |
c3f6f71d JM |
4529 | parent_pid = proc_parent_pid (pi); |
4530 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4531 | /* FIXME: use access functions */ | |
4532 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4533 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4534 | file for the inferior. */ | |
4535 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4536 | { | |
4537 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4538 | } | |
4539 | #endif | |
4540 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4541 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4542 | to kill the inferior, otherwise it might remain stopped with a | |
4543 | pending SIGKILL. | |
4544 | We do not check the result of the PIOCSSIG, the inferior might have | |
4545 | died already. */ | |
4546 | { | |
37de36c6 | 4547 | gdb_siginfo_t newsiginfo; |
c906108c | 4548 | |
c3f6f71d JM |
4549 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4550 | newsiginfo.si_signo = SIGKILL; | |
4551 | newsiginfo.si_code = 0; | |
4552 | newsiginfo.si_errno = 0; | |
4553 | newsiginfo.si_pid = getpid (); | |
4554 | newsiginfo.si_uid = getuid (); | |
4555 | /* FIXME: use proc_set_current_signal */ | |
4556 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4557 | } | |
4558 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4559 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4560 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4561 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4562 | destroy_procinfo (pi); | |
c906108c | 4563 | |
c3f6f71d JM |
4564 | /* If pi is GDB's child, wait for it to die. */ |
4565 | if (parent_pid == getpid ()) | |
19958708 | 4566 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4567 | Should we check the returned event? */ |
4568 | { | |
0d06e24b | 4569 | #if 0 |
c3f6f71d | 4570 | int status, ret; |
c906108c | 4571 | |
c3f6f71d JM |
4572 | ret = waitpid (pi->pid, &status, 0); |
4573 | #else | |
4574 | wait (NULL); | |
4575 | #endif | |
4576 | } | |
4577 | } | |
c906108c | 4578 | |
77382aee PA |
4579 | /* We're done debugging it, and we want it to go away. Then we want |
4580 | GDB to forget all about it. */ | |
c906108c | 4581 | |
19958708 | 4582 | static void |
7d85a9c0 | 4583 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4584 | { |
39f77062 | 4585 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4586 | { |
4587 | /* Find procinfo for main process */ | |
39f77062 | 4588 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4589 | |
c3f6f71d JM |
4590 | if (pi) |
4591 | unconditionally_kill_inferior (pi); | |
4592 | target_mourn_inferior (); | |
c906108c | 4593 | } |
c3f6f71d JM |
4594 | } |
4595 | ||
77382aee | 4596 | /* Forget we ever debugged this thing! */ |
c906108c | 4597 | |
19958708 | 4598 | static void |
136d6dae | 4599 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4600 | { |
4601 | procinfo *pi; | |
c906108c | 4602 | |
39f77062 | 4603 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4604 | { |
4605 | /* Find procinfo for main process */ | |
39f77062 | 4606 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4607 | if (pi) |
4608 | destroy_procinfo (pi); | |
c906108c | 4609 | } |
28439f5e | 4610 | unpush_target (ops); |
8181d85f DJ |
4611 | |
4612 | if (dbx_link_bpt != NULL) | |
4613 | { | |
a6d9a66e | 4614 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4615 | dbx_link_bpt_addr = 0; |
4616 | dbx_link_bpt = NULL; | |
4617 | } | |
4618 | ||
c3f6f71d JM |
4619 | generic_mourn_inferior (); |
4620 | } | |
c906108c | 4621 | |
77382aee PA |
4622 | /* When GDB forks to create a runnable inferior process, this function |
4623 | is called on the parent side of the fork. It's job is to do | |
4624 | whatever is necessary to make the child ready to be debugged, and | |
4625 | then wait for the child to synchronize. */ | |
c906108c | 4626 | |
19958708 | 4627 | static void |
28439f5e | 4628 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4629 | { |
4630 | procinfo *pi; | |
37de36c6 | 4631 | gdb_sigset_t signals; |
c3f6f71d | 4632 | int fail; |
2689673f | 4633 | int lwpid; |
c906108c | 4634 | |
c3f6f71d JM |
4635 | /* This routine called on the parent side (GDB side) |
4636 | after GDB forks the inferior. */ | |
28439f5e | 4637 | push_target (ops); |
c906108c | 4638 | |
c3f6f71d JM |
4639 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4640 | perror ("procfs: out of memory in 'init_inferior'"); | |
4641 | ||
4642 | if (!open_procinfo_files (pi, FD_CTL)) | |
4643 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4644 | ||
4645 | /* | |
4646 | xmalloc // done | |
4647 | open_procinfo_files // done | |
4648 | link list // done | |
4649 | prfillset (trace) | |
4650 | procfs_notice_signals | |
4651 | prfillset (fault) | |
4652 | prdelset (FLTPAGE) | |
4653 | PIOCWSTOP | |
4654 | PIOCSFAULT | |
4655 | */ | |
4656 | ||
77382aee | 4657 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4658 | if (!(proc_flags (pi) & PR_STOPPED) && |
4659 | !(proc_wait_for_stop (pi))) | |
4660 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4661 | ||
4662 | /* Save some of the /proc state to be restored if we detach. */ | |
4663 | /* FIXME: Why? In case another debugger was debugging it? | |
4664 | We're it's parent, for Ghu's sake! */ | |
4665 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
4666 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4667 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4668 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4669 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4670 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4671 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4672 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4673 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4674 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4675 | ||
77382aee | 4676 | /* Register to trace selected signals in the child. */ |
c3f6f71d JM |
4677 | prfillset (&signals); |
4678 | if (!register_gdb_signals (pi, &signals)) | |
4679 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
4680 | ||
4681 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
4682 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4683 | ||
0d06e24b JM |
4684 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4685 | and possibly even turning ON kill-on-last-close at this point. But | |
4686 | I can't make that change without careful testing which I don't have | |
4687 | time to do right now... */ | |
c3f6f71d JM |
4688 | /* Turn on run-on-last-close flag so that the child |
4689 | will die if GDB goes away for some reason. */ | |
4690 | if (!proc_set_run_on_last_close (pi)) | |
4691 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4692 | ||
2689673f PA |
4693 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4694 | lwpid = proc_get_current_thread (pi); | |
4695 | ||
4696 | /* Create a procinfo for the main lwp. */ | |
4697 | create_procinfo (pid, lwpid); | |
4698 | ||
4699 | /* We already have a main thread registered in the thread table at | |
4700 | this point, but it didn't have any lwp info yet. Notify the core | |
4701 | about it. This changes inferior_ptid as well. */ | |
4702 | thread_change_ptid (pid_to_ptid (pid), | |
4703 | MERGEPID (pid, lwpid)); | |
c906108c | 4704 | |
46ac7a5d AC |
4705 | /* Typically two, one trap to exec the shell, one to exec the |
4706 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4707 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4708 | |
4709 | #ifdef SYS_syssgi | |
4710 | /* On mips-irix, we need to stop the inferior early enough during | |
4711 | the startup phase in order to be able to load the shared library | |
4712 | symbols and insert the breakpoints that are located in these shared | |
4713 | libraries. Stopping at the program entry point is not good enough | |
4714 | because the -init code is executed before the execution reaches | |
4715 | that point. | |
4716 | ||
4717 | So what we need to do is to insert a breakpoint in the runtime | |
4718 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4719 | called by rld once all shared libraries have been mapped, but before | |
4720 | the -init code is executed. Unfortuantely, this is not straightforward, | |
4721 | as rld is not part of the executable we are running, and thus we need | |
4722 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4723 | |
9185ddce JB |
4724 | For this, we trace all syssgi() syscall exit events. Each time |
4725 | we detect such an event, we iterate over each text memory maps, | |
4726 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4727 | When found, we know that rld has been mapped, and that we can insert | |
4728 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4729 | has been inserted, the syssgi() notifications are no longer necessary, | |
4730 | so they should be canceled. */ | |
4731 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4732 | #endif |
c3f6f71d | 4733 | } |
c906108c | 4734 | |
77382aee PA |
4735 | /* When GDB forks to create a new process, this function is called on |
4736 | the child side of the fork before GDB exec's the user program. Its | |
4737 | job is to make the child minimally debuggable, so that the parent | |
4738 | GDB process can connect to the child and take over. This function | |
4739 | should do only the minimum to make that possible, and to | |
4740 | synchronize with the parent process. The parent process should | |
4741 | take care of the details. */ | |
c3f6f71d JM |
4742 | |
4743 | static void | |
fba45db2 | 4744 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4745 | { |
4746 | /* This routine called on the child side (inferior side) | |
4747 | after GDB forks the inferior. It must use only local variables, | |
4748 | because it may be sharing data space with its parent. */ | |
c906108c | 4749 | |
c3f6f71d | 4750 | procinfo *pi; |
37de36c6 | 4751 | sysset_t *exitset; |
c906108c | 4752 | |
c3f6f71d | 4753 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4754 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4755 | |
c3f6f71d JM |
4756 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4757 | { | |
4758 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4759 | gdb_flush (gdb_stderr); | |
77382aee PA |
4760 | /* No need to call "dead_procinfo", because we're going to |
4761 | exit. */ | |
c3f6f71d JM |
4762 | _exit (127); |
4763 | } | |
c906108c | 4764 | |
c3f6f71d JM |
4765 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4766 | /* OSF method for tracing exec syscalls. Quoting: | |
4767 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4768 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4769 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4770 | { |
4771 | int prfs_flags; | |
c906108c | 4772 | |
c3f6f71d JM |
4773 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4774 | { | |
4775 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4776 | gdb_flush (gdb_stderr); | |
4777 | _exit (127); | |
4778 | } | |
4779 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4780 | |
c3f6f71d JM |
4781 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4782 | { | |
4783 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4784 | gdb_flush (gdb_stderr); | |
4785 | _exit (127); | |
4786 | } | |
4787 | } | |
4788 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4789 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4790 | /* GW: Rationale... |
4791 | Not all systems with /proc have all the exec* syscalls with the same | |
4792 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4793 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4794 | |
37de36c6 KB |
4795 | exitset = sysset_t_alloc (pi); |
4796 | gdb_premptysysset (exitset); | |
c3f6f71d | 4797 | #ifdef SYS_exec |
37de36c6 | 4798 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4799 | #endif |
4800 | #ifdef SYS_execve | |
37de36c6 | 4801 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4802 | #endif |
4803 | #ifdef SYS_execv | |
37de36c6 | 4804 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4805 | #endif |
37de36c6 KB |
4806 | #ifdef DYNAMIC_SYSCALLS |
4807 | { | |
4808 | int callnum = find_syscall (pi, "execve"); | |
4809 | ||
4810 | if (callnum >= 0) | |
4811 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4812 | |
37de36c6 KB |
4813 | callnum = find_syscall (pi, "ra_execve"); |
4814 | if (callnum >= 0) | |
4815 | gdb_praddsysset (exitset, callnum); | |
4816 | } | |
4817 | #endif /* DYNAMIC_SYSCALLS */ | |
4818 | ||
4819 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4820 | { |
c3f6f71d JM |
4821 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4822 | gdb_flush (gdb_stderr); | |
4823 | _exit (127); | |
c906108c | 4824 | } |
c3f6f71d JM |
4825 | #endif /* PRFS_STOPEXEC */ |
4826 | ||
4827 | /* FIXME: should this be done in the parent instead? */ | |
4828 | /* Turn off inherit on fork flag so that all grand-children | |
4829 | of gdb start with tracing flags cleared. */ | |
4830 | if (!proc_unset_inherit_on_fork (pi)) | |
4831 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4832 | ||
4833 | /* Turn off run on last close flag, so that the child process | |
4834 | cannot run away just because we close our handle on it. | |
4835 | We want it to wait for the parent to attach. */ | |
4836 | if (!proc_unset_run_on_last_close (pi)) | |
4837 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4838 | ||
19958708 | 4839 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
4840 | we have our own address space, and we're about to do an exec! */ |
4841 | /*destroy_procinfo (pi);*/ | |
c906108c | 4842 | } |
c906108c | 4843 | |
77382aee PA |
4844 | /* This function is called BEFORE gdb forks the inferior process. Its |
4845 | only real responsibility is to set things up for the fork, and tell | |
4846 | GDB which two functions to call after the fork (one for the parent, | |
4847 | and one for the child). | |
4848 | ||
4849 | This function does a complicated search for a unix shell program, | |
4850 | which it then uses to parse arguments and environment variables to | |
4851 | be sent to the child. I wonder whether this code could not be | |
4852 | abstracted out and shared with other unix targets such as | |
4853 | inf-ptrace? */ | |
c906108c SS |
4854 | |
4855 | static void | |
136d6dae VP |
4856 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4857 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4858 | { |
4859 | char *shell_file = getenv ("SHELL"); | |
4860 | char *tryname; | |
28439f5e PA |
4861 | int pid; |
4862 | ||
c906108c SS |
4863 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4864 | { | |
4865 | ||
4866 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4867 | just do this the normal way (via execlp, which operates by |
4868 | attempting an exec for each element of the PATH until it | |
4869 | finds one which succeeds), then there will be an exec for | |
4870 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4871 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4872 | for these failed execs with the ones for successful execs | |
4873 | (whether the exec has succeeded is stored at that time in the | |
4874 | carry bit or some such architecture-specific and | |
4875 | non-ABI-specified place). | |
4876 | ||
4877 | So I can't think of anything better than to search the PATH | |
4878 | now. This has several disadvantages: (1) There is a race | |
4879 | condition; if we find a file now and it is deleted before we | |
4880 | exec it, we lose, even if the deletion leaves a valid file | |
4881 | further down in the PATH, (2) there is no way to know exactly | |
4882 | what an executable (in the sense of "capable of being | |
4883 | exec'd") file is. Using access() loses because it may lose | |
4884 | if the caller is the superuser; failing to use it loses if | |
4885 | there are ACLs or some such. */ | |
c906108c SS |
4886 | |
4887 | char *p; | |
4888 | char *p1; | |
4889 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4890 | path is used from within GDB. */ |
c906108c SS |
4891 | char *path = getenv ("PATH"); |
4892 | int len; | |
4893 | struct stat statbuf; | |
4894 | ||
4895 | if (path == NULL) | |
4896 | path = "/bin:/usr/bin"; | |
4897 | ||
4898 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4899 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4900 | { |
4901 | p1 = strchr (p, ':'); | |
4902 | if (p1 != NULL) | |
4903 | len = p1 - p; | |
4904 | else | |
4905 | len = strlen (p); | |
4906 | strncpy (tryname, p, len); | |
4907 | tryname[len] = '\0'; | |
4908 | strcat (tryname, "/"); | |
4909 | strcat (tryname, shell_file); | |
4910 | if (access (tryname, X_OK) < 0) | |
4911 | continue; | |
4912 | if (stat (tryname, &statbuf) < 0) | |
4913 | continue; | |
4914 | if (!S_ISREG (statbuf.st_mode)) | |
4915 | /* We certainly need to reject directories. I'm not quite | |
4916 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4917 | that people want to exec() these things. */ | |
4918 | continue; | |
4919 | break; | |
4920 | } | |
4921 | if (p == NULL) | |
4922 | /* Not found. This must be an error rather than merely passing | |
4923 | the file to execlp(), because execlp() would try all the | |
4924 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4925 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4926 | __LINE__, shell_file); |
c906108c SS |
4927 | |
4928 | shell_file = tryname; | |
4929 | } | |
4930 | ||
28439f5e PA |
4931 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
4932 | NULL, NULL, shell_file); | |
4933 | ||
4934 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4935 | } |
4936 | ||
4937 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4938 | |
27087a3d JB |
4939 | static void |
4940 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4941 | { | |
9185ddce | 4942 | #ifdef SYS_syssgi |
77382aee | 4943 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4944 | They should normally have been removed by now, but they may still |
4945 | be activated if the inferior doesn't use shared libraries, or if | |
4946 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4947 | See procfs_init_inferior() for more details. |
4948 | ||
4949 | Since these notifications are only ever enabled when we spawned | |
4950 | the inferior ourselves, there is nothing to do when the inferior | |
4951 | was created by attaching to an already running process, or when | |
4952 | debugging a core file. */ | |
4953 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4954 | return; | |
4955 | ||
9185ddce | 4956 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4957 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4958 | #endif |
c906108c SS |
4959 | } |
4960 | ||
77382aee | 4961 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4962 | |
c3f6f71d | 4963 | static int |
fba45db2 | 4964 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4965 | { |
39f77062 | 4966 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4967 | |
2689673f | 4968 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4969 | add_thread (gdb_threadid); |
c906108c | 4970 | |
c3f6f71d JM |
4971 | return 0; |
4972 | } | |
4973 | ||
77382aee PA |
4974 | /* Query all the threads that the target knows about, and give them |
4975 | back to GDB to add to its list. */ | |
c3f6f71d JM |
4976 | |
4977 | void | |
28439f5e | 4978 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4979 | { |
4980 | procinfo *pi; | |
4981 | ||
4982 | /* Find procinfo for main process */ | |
39f77062 | 4983 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4984 | proc_update_threads (pi); |
4985 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4986 | } |
4987 | ||
77382aee PA |
4988 | /* Return true if the thread is still 'alive'. This guy doesn't |
4989 | really seem to be doing his job. Got to investigate how to tell | |
4990 | when a thread is really gone. */ | |
c906108c | 4991 | |
c906108c | 4992 | static int |
28439f5e | 4993 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4994 | { |
c3f6f71d JM |
4995 | int proc, thread; |
4996 | procinfo *pi; | |
c906108c | 4997 | |
39f77062 KB |
4998 | proc = PIDGET (ptid); |
4999 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5000 | /* If I don't know it, it ain't alive! */ |
5001 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5002 | return 0; | |
5003 | ||
5004 | /* If I can't get its status, it ain't alive! | |
5005 | What's more, I need to forget about it! */ | |
5006 | if (!proc_get_status (pi)) | |
5007 | { | |
5008 | destroy_procinfo (pi); | |
5009 | return 0; | |
5010 | } | |
77382aee PA |
5011 | /* I couldn't have got its status if it weren't alive, so it's |
5012 | alive. */ | |
c3f6f71d | 5013 | return 1; |
c906108c | 5014 | } |
c3f6f71d | 5015 | |
77382aee PA |
5016 | /* Convert PTID to a string. Returns the string in a static |
5017 | buffer. */ | |
c3f6f71d JM |
5018 | |
5019 | char * | |
117de6a9 | 5020 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5021 | { |
5022 | static char buf[80]; | |
c3f6f71d | 5023 | |
5240ceac MK |
5024 | if (TIDGET (ptid) == 0) |
5025 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5026 | else |
21749010 | 5027 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5028 | |
5029 | return buf; | |
c3f6f71d JM |
5030 | } |
5031 | ||
77382aee | 5032 | /* Insert a watchpoint. */ |
c3f6f71d | 5033 | |
19958708 | 5034 | int |
39f77062 | 5035 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 5036 | int after) |
c906108c | 5037 | { |
c3f6f71d | 5038 | #ifndef UNIXWARE |
37de36c6 | 5039 | #ifndef AIX5 |
c3f6f71d | 5040 | int pflags = 0; |
19958708 | 5041 | procinfo *pi; |
c3f6f71d | 5042 | |
19958708 | 5043 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5044 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5045 | |
5046 | /* Translate from GDB's flags to /proc's */ | |
5047 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5048 | { |
c3f6f71d JM |
5049 | switch (rwflag) { /* FIXME: need an enum! */ |
5050 | case hw_write: /* default watchpoint (write) */ | |
5051 | pflags = WRITE_WATCHFLAG; | |
5052 | break; | |
5053 | case hw_read: /* read watchpoint */ | |
5054 | pflags = READ_WATCHFLAG; | |
5055 | break; | |
5056 | case hw_access: /* access watchpoint */ | |
5057 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5058 | break; | |
5059 | case hw_execute: /* execution HW breakpoint */ | |
5060 | pflags = EXEC_WATCHFLAG; | |
5061 | break; | |
5062 | default: /* Something weird. Return error. */ | |
c906108c | 5063 | return -1; |
c3f6f71d JM |
5064 | } |
5065 | if (after) /* Stop after r/w access is completed. */ | |
5066 | pflags |= AFTER_WATCHFLAG; | |
5067 | } | |
5068 | ||
5069 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5070 | { | |
5071 | if (errno == E2BIG) /* Typical error for no resources */ | |
5072 | return -1; /* fail */ | |
5073 | /* GDB may try to remove the same watchpoint twice. | |
5074 | If a remove request returns no match, don't error. */ | |
c906108c | 5075 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5076 | return 0; /* ignore */ |
5077 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5078 | } |
37de36c6 KB |
5079 | #endif /* AIX5 */ |
5080 | #endif /* UNIXWARE */ | |
c906108c SS |
5081 | return 0; |
5082 | } | |
5083 | ||
1e03ad20 KB |
5084 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5085 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5086 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5087 | far. | |
19958708 | 5088 | |
1e03ad20 KB |
5089 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5090 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5091 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5092 | |
5093 | static int | |
5094 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5095 | { | |
1e03ad20 KB |
5096 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5097 | and target pointers must be of the same size. If they are not, | |
5098 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5099 | fact that proc_set_watchpoint() calls |
5100 | procfs_address_to_host_pointer(); a close inspection of | |
5101 | procfs_address_to_host_pointer will reveal that an internal error | |
5102 | will be generated when the host and target pointer sizes are | |
5103 | different. */ | |
4e906f53 UW |
5104 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
5105 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) | |
1e03ad20 KB |
5106 | return 0; |
5107 | ||
5108 | /* Other tests here??? */ | |
5109 | ||
5110 | return 1; | |
1e03ad20 KB |
5111 | } |
5112 | ||
77382aee PA |
5113 | /* Returns non-zero if process is stopped on a hardware watchpoint |
5114 | fault, else returns zero. */ | |
c3f6f71d | 5115 | |
25513619 PA |
5116 | static int |
5117 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5118 | { |
c3f6f71d | 5119 | procinfo *pi; |
c906108c | 5120 | |
25513619 | 5121 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 5122 | |
c3f6f71d | 5123 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5124 | { |
c3f6f71d | 5125 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5126 | { |
c906108c | 5127 | #ifdef FLTWATCH |
c3f6f71d JM |
5128 | if (proc_what (pi) == FLTWATCH) |
5129 | return 1; | |
c906108c SS |
5130 | #endif |
5131 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5132 | if (proc_what (pi) == FLTKWATCH) |
5133 | return 1; | |
c906108c | 5134 | #endif |
c3f6f71d | 5135 | } |
c906108c SS |
5136 | } |
5137 | return 0; | |
5138 | } | |
c906108c | 5139 | |
77382aee PA |
5140 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
5141 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
5142 | address. This function is only called if | |
5143 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
5144 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
5145 | |
5146 | static int | |
5147 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
5148 | { | |
5149 | procinfo *pi; | |
5150 | ||
5151 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5152 | return proc_watchpoint_address (pi, addr); | |
5153 | } | |
5154 | ||
25513619 PA |
5155 | static int |
5156 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type) | |
5157 | { | |
d92524f1 | 5158 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5159 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5160 | { |
5161 | /* When a hardware watchpoint fires off the PC will be left at | |
5162 | the instruction following the one which caused the | |
5163 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5164 | the watchpoint. */ | |
5165 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5166 | } | |
5167 | else | |
5168 | { | |
5169 | /* When a hardware watchpoint fires off the PC will be left at | |
5170 | the instruction which caused the watchpoint. It will be | |
5171 | necessary for GDB to step over the watchpoint. */ | |
5172 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5173 | } | |
5174 | } | |
5175 | ||
5176 | static int | |
5177 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type) | |
5178 | { | |
5179 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5180 | } | |
5181 | ||
5182 | static int | |
5183 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5184 | { | |
5185 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5186 | system can support "thousands" of hardware watchpoints, but gives | |
5187 | no method for finding out how many; It doesn't say anything about | |
5188 | the allowed size for the watched area either. So we just tell | |
5189 | GDB 'yes'. */ | |
5190 | return 1; | |
5191 | } | |
5192 | ||
5193 | void | |
5194 | procfs_use_watchpoints (struct target_ops *t) | |
5195 | { | |
5196 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5197 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5198 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5199 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5200 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 5201 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
5202 | } |
5203 | ||
77382aee PA |
5204 | /* Memory Mappings Functions: */ |
5205 | ||
5206 | /* Call a callback function once for each mapping, passing it the | |
5207 | mapping, an optional secondary callback function, and some optional | |
5208 | opaque data. Quit and return the first non-zero value returned | |
5209 | from the callback. | |
5210 | ||
5211 | PI is the procinfo struct for the process to be mapped. FUNC is | |
5212 | the callback function to be called by this iterator. DATA is the | |
5213 | optional opaque data to be passed to the callback function. | |
5214 | CHILD_FUNC is the optional secondary function pointer to be passed | |
5215 | to the child function. Returns the first non-zero return value | |
5216 | from the callback function, or zero. */ | |
831e682e MS |
5217 | |
5218 | static int | |
e9ef4f39 JB |
5219 | iterate_over_mappings (procinfo *pi, |
5220 | iterate_over_mappings_cb_ftype *child_func, | |
5221 | void *data, | |
19958708 | 5222 | int (*func) (struct prmap *map, |
e9ef4f39 | 5223 | iterate_over_mappings_cb_ftype *child_func, |
831e682e MS |
5224 | void *data)) |
5225 | { | |
5226 | char pathname[MAX_PROC_NAME_SIZE]; | |
5227 | struct prmap *prmaps; | |
5228 | struct prmap *prmap; | |
5229 | int funcstat; | |
5230 | int map_fd; | |
5231 | int nmap; | |
5232 | #ifdef NEW_PROC_API | |
5233 | struct stat sbuf; | |
5234 | #endif | |
5235 | ||
19958708 | 5236 | /* Get the number of mappings, allocate space, |
831e682e MS |
5237 | and read the mappings into prmaps. */ |
5238 | #ifdef NEW_PROC_API | |
5239 | /* Open map fd. */ | |
5240 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5241 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5242 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5243 | ||
5244 | /* Make sure it gets closed again. */ | |
5245 | make_cleanup_close (map_fd); | |
5246 | ||
19958708 | 5247 | /* Use stat to determine the file size, and compute |
831e682e MS |
5248 | the number of prmap_t objects it contains. */ |
5249 | if (fstat (map_fd, &sbuf) != 0) | |
5250 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5251 | ||
5252 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5253 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5254 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5255 | != (nmap * sizeof (*prmaps))) | |
5256 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5257 | #else | |
5258 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5259 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5260 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5261 | ||
5262 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5263 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5264 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5265 | #endif | |
5266 | ||
5267 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5268 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5269 | return funcstat; | |
5270 | ||
5271 | return 0; | |
5272 | } | |
5273 | ||
77382aee PA |
5274 | /* Implements the to_find_memory_regions method. Calls an external |
5275 | function for each memory region. The external function will have | |
5276 | the signature: | |
5277 | ||
5278 | int callback (CORE_ADDR vaddr, | |
5279 | unsigned long size, | |
5280 | int read, int write, int execute, | |
5281 | void *data); | |
5282 | ||
5283 | Returns the integer value returned by the callback. */ | |
be4d1333 MS |
5284 | |
5285 | static int | |
19958708 RM |
5286 | find_memory_regions_callback (struct prmap *map, |
5287 | int (*func) (CORE_ADDR, | |
5288 | unsigned long, | |
5289 | int, int, int, | |
be4d1333 MS |
5290 | void *), |
5291 | void *data) | |
5292 | { | |
bf75638e | 5293 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5294 | map->pr_size, |
be4d1333 MS |
5295 | (map->pr_mflags & MA_READ) != 0, |
5296 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5297 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5298 | data); |
5299 | } | |
5300 | ||
77382aee PA |
5301 | /* External interface. Calls a callback function once for each |
5302 | mapped memory region in the child process, passing as arguments: | |
5303 | ||
5304 | CORE_ADDR virtual_address, | |
5305 | unsigned long size, | |
5306 | int read, TRUE if region is readable by the child | |
5307 | int write, TRUE if region is writable by the child | |
5308 | int execute TRUE if region is executable by the child. | |
5309 | ||
5310 | Stops iterating and returns the first non-zero value returned by | |
5311 | the callback. */ | |
be4d1333 MS |
5312 | |
5313 | static int | |
19958708 RM |
5314 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5315 | unsigned long, | |
5316 | int, int, int, | |
5317 | void *), | |
be4d1333 MS |
5318 | void *data) |
5319 | { | |
5320 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5321 | ||
19958708 | 5322 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5323 | find_memory_regions_callback); |
5324 | } | |
5325 | ||
77382aee | 5326 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5327 | |
388faa48 | 5328 | static char * |
5ae5f592 | 5329 | mappingflags (long flags) |
388faa48 MS |
5330 | { |
5331 | static char asciiflags[8]; | |
5332 | ||
5333 | strcpy (asciiflags, "-------"); | |
5334 | #if defined (MA_PHYS) | |
5335 | if (flags & MA_PHYS) | |
5336 | asciiflags[0] = 'd'; | |
5337 | #endif | |
5338 | if (flags & MA_STACK) | |
5339 | asciiflags[1] = 's'; | |
5340 | if (flags & MA_BREAK) | |
5341 | asciiflags[2] = 'b'; | |
5342 | if (flags & MA_SHARED) | |
5343 | asciiflags[3] = 's'; | |
5344 | if (flags & MA_READ) | |
5345 | asciiflags[4] = 'r'; | |
5346 | if (flags & MA_WRITE) | |
5347 | asciiflags[5] = 'w'; | |
5348 | if (flags & MA_EXEC) | |
5349 | asciiflags[6] = 'x'; | |
5350 | return (asciiflags); | |
5351 | } | |
5352 | ||
77382aee PA |
5353 | /* Callback function, does the actual work for 'info proc |
5354 | mappings'. */ | |
831e682e | 5355 | |
831e682e | 5356 | static int |
e9ef4f39 JB |
5357 | info_mappings_callback (struct prmap *map, |
5358 | iterate_over_mappings_cb_ftype *ignore, | |
5359 | void *unused) | |
831e682e | 5360 | { |
0b62613e | 5361 | unsigned int pr_off; |
831e682e | 5362 | |
831e682e | 5363 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5364 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5365 | #else |
0b62613e | 5366 | pr_off = map->pr_off; |
831e682e | 5367 | #endif |
0b62613e | 5368 | |
a97b0ac8 | 5369 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5370 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5371 | (unsigned long) map->pr_vaddr, |
5372 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5373 | (unsigned long) map->pr_size, |
0b62613e PA |
5374 | pr_off, |
5375 | mappingflags (map->pr_mflags)); | |
5376 | else | |
f6a96b83 | 5377 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5378 | (unsigned long) map->pr_vaddr, |
5379 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5380 | (unsigned long) map->pr_size, |
0b62613e PA |
5381 | pr_off, |
5382 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5383 | |
5384 | return 0; | |
5385 | } | |
5386 | ||
77382aee | 5387 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5388 | |
5389 | static void | |
5390 | info_proc_mappings (procinfo *pi, int summary) | |
5391 | { | |
388faa48 MS |
5392 | if (summary) |
5393 | return; /* No output for summary mode. */ | |
5394 | ||
a3f17187 | 5395 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5396 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5397 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5398 | "Start Addr", | |
5399 | " End Addr", | |
5400 | " Size", | |
5401 | " Offset", | |
5402 | "Flags"); | |
5403 | else | |
5404 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5405 | "Start Addr", | |
5406 | " End Addr", | |
5407 | " Size", | |
5408 | " Offset", | |
5409 | "Flags"); | |
388faa48 | 5410 | |
831e682e | 5411 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5412 | printf_filtered ("\n"); |
5413 | } | |
5414 | ||
77382aee | 5415 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5416 | |
5417 | static void | |
fba45db2 | 5418 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5419 | { |
c3f6f71d | 5420 | struct cleanup *old_chain; |
388faa48 MS |
5421 | procinfo *process = NULL; |
5422 | procinfo *thread = NULL; | |
5423 | char **argv = NULL; | |
5424 | char *tmp = NULL; | |
5425 | int pid = 0; | |
5426 | int tid = 0; | |
5427 | int mappings = 0; | |
c906108c | 5428 | |
c3f6f71d JM |
5429 | old_chain = make_cleanup (null_cleanup, 0); |
5430 | if (args) | |
0fda6bd2 | 5431 | { |
d1a41061 PP |
5432 | argv = gdb_buildargv (args); |
5433 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5434 | } |
c3f6f71d JM |
5435 | while (argv != NULL && *argv != NULL) |
5436 | { | |
5437 | if (isdigit (argv[0][0])) | |
5438 | { | |
5439 | pid = strtoul (argv[0], &tmp, 10); | |
5440 | if (*tmp == '/') | |
5441 | tid = strtoul (++tmp, NULL, 10); | |
5442 | } | |
5443 | else if (argv[0][0] == '/') | |
5444 | { | |
5445 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5446 | } | |
388faa48 MS |
5447 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5448 | { | |
5449 | mappings = 1; | |
5450 | } | |
c3f6f71d JM |
5451 | else |
5452 | { | |
5453 | /* [...] */ | |
5454 | } | |
5455 | argv++; | |
5456 | } | |
5457 | if (pid == 0) | |
39f77062 | 5458 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5459 | if (pid == 0) |
8a3fe4f8 | 5460 | error (_("No current process: you must name one.")); |
c3f6f71d | 5461 | else |
c906108c | 5462 | { |
c3f6f71d JM |
5463 | /* Have pid, will travel. |
5464 | First see if it's a process we're already debugging. */ | |
5465 | process = find_procinfo (pid, 0); | |
5466 | if (process == NULL) | |
5467 | { | |
19958708 | 5468 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5469 | remember to close it again when finished. */ |
5470 | process = create_procinfo (pid, 0); | |
004527cb | 5471 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5472 | if (!open_procinfo_files (process, FD_CTL)) |
5473 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5474 | } | |
c906108c | 5475 | } |
c3f6f71d JM |
5476 | if (tid != 0) |
5477 | thread = create_procinfo (pid, tid); | |
5478 | ||
5479 | if (process) | |
5480 | { | |
a3f17187 | 5481 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5482 | proc_prettyprint_flags (proc_flags (process), 1); |
5483 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5484 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5485 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5486 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5487 | proc_get_nthreads (process)); |
5488 | } | |
5489 | if (thread) | |
5490 | { | |
a3f17187 | 5491 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5492 | proc_prettyprint_flags (proc_flags (thread), 1); |
5493 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5494 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5495 | } | |
5496 | ||
388faa48 MS |
5497 | if (mappings) |
5498 | { | |
5499 | info_proc_mappings (process, 0); | |
5500 | } | |
5501 | ||
c3f6f71d | 5502 | do_cleanups (old_chain); |
c906108c SS |
5503 | } |
5504 | ||
9185ddce JB |
5505 | /* Modify the status of the system call identified by SYSCALLNUM in |
5506 | the set of syscalls that are currently traced/debugged. | |
5507 | ||
5508 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5509 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5510 | ||
5511 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5512 | will be disabled. */ | |
5513 | ||
5514 | static void | |
5515 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5516 | int mode, int from_tty) |
9185ddce JB |
5517 | { |
5518 | sysset_t *sysset; | |
77382aee | 5519 | |
9185ddce JB |
5520 | if (entry_or_exit == PR_SYSENTRY) |
5521 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5522 | else | |
5523 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5524 | ||
5525 | if (sysset == NULL) | |
5526 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5527 | ||
5528 | if (mode == FLAG_SET) | |
5529 | gdb_praddsysset (sysset, syscallnum); | |
5530 | else | |
5531 | gdb_prdelsysset (sysset, syscallnum); | |
5532 | ||
5533 | if (entry_or_exit == PR_SYSENTRY) | |
5534 | { | |
5535 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5536 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5537 | } |
5538 | else | |
5539 | { | |
5540 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5541 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5542 | } |
5543 | } | |
5544 | ||
c3f6f71d | 5545 | static void |
fba45db2 | 5546 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5547 | { |
c3f6f71d | 5548 | procinfo *pi; |
c906108c | 5549 | |
39f77062 | 5550 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5551 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5552 | |
c3f6f71d | 5553 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5554 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5555 | |
39f77062 | 5556 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5557 | if (isdigit (args[0])) |
5558 | { | |
9185ddce | 5559 | const int syscallnum = atoi (args); |
c906108c | 5560 | |
9185ddce | 5561 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5562 | } |
5563 | } | |
5564 | ||
19958708 | 5565 | static void |
fba45db2 | 5566 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5567 | { |
c3f6f71d JM |
5568 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5569 | } | |
c906108c | 5570 | |
19958708 | 5571 | static void |
fba45db2 | 5572 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5573 | { |
5574 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5575 | } |
c906108c | 5576 | |
19958708 | 5577 | static void |
fba45db2 | 5578 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5579 | { |
5580 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5581 | } | |
5582 | ||
19958708 | 5583 | static void |
fba45db2 | 5584 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5585 | { |
c3f6f71d JM |
5586 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5587 | } | |
c906108c | 5588 | |
c906108c | 5589 | |
c906108c | 5590 | void |
fba45db2 | 5591 | _initialize_procfs (void) |
c906108c | 5592 | { |
27087a3d JB |
5593 | observer_attach_inferior_created (procfs_inferior_created); |
5594 | ||
1bedd215 AC |
5595 | add_info ("proc", info_proc_cmd, _("\ |
5596 | Show /proc process information about any running process.\n\ | |
388faa48 | 5597 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 5598 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 5599 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5600 | _("Give a trace of entries into the syscall.")); |
19958708 | 5601 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5602 | _("Give a trace of exits from the syscall.")); |
19958708 | 5603 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5604 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5605 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5606 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5607 | } |
5608 | ||
5609 | /* =================== END, GDB "MODULE" =================== */ | |
5610 | ||
5611 | ||
5612 | ||
77382aee PA |
5613 | /* miscellaneous stubs: */ |
5614 | ||
5615 | /* The following satisfy a few random symbols mostly created by the | |
5616 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5617 | |
77382aee PA |
5618 | /* Return a pid for which we guarantee we will be able to find a |
5619 | 'live' procinfo. */ | |
c3f6f71d | 5620 | |
39f77062 | 5621 | ptid_t |
fba45db2 | 5622 | procfs_first_available (void) |
c3f6f71d | 5623 | { |
39f77062 | 5624 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5625 | } |
be4d1333 MS |
5626 | |
5627 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5628 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5629 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5630 | |
5631 | static char * | |
19958708 | 5632 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
5633 | char *note_data, int *note_size, |
5634 | enum target_signal stop_signal) | |
be4d1333 | 5635 | { |
594f7785 | 5636 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5637 | gdb_gregset_t gregs; |
5638 | gdb_fpregset_t fpregs; | |
5639 | unsigned long merged_pid; | |
75125405 | 5640 | struct cleanup *old_chain; |
be4d1333 MS |
5641 | |
5642 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5643 | ||
75125405 DJ |
5644 | /* This part is the old method for fetching registers. |
5645 | It should be replaced by the newer one using regsets | |
5646 | once it is implemented in this platform: | |
5647 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ | |
5648 | ||
5649 | old_chain = save_inferior_ptid (); | |
5650 | inferior_ptid = ptid; | |
5651 | target_fetch_registers (regcache, -1); | |
5652 | ||
594f7785 | 5653 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5654 | #if defined (NEW_PROC_API) |
65554fef MS |
5655 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5656 | note_data, | |
5657 | note_size, | |
19958708 | 5658 | merged_pid, |
65554fef MS |
5659 | stop_signal, |
5660 | &gregs); | |
5661 | #else | |
be4d1333 | 5662 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5663 | note_data, |
5664 | note_size, | |
19958708 | 5665 | merged_pid, |
be4d1333 | 5666 | stop_signal, |
65554fef MS |
5667 | &gregs); |
5668 | #endif | |
594f7785 | 5669 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5670 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5671 | note_data, | |
5672 | note_size, | |
5673 | &fpregs, | |
5674 | sizeof (fpregs)); | |
75125405 DJ |
5675 | |
5676 | do_cleanups (old_chain); | |
5677 | ||
be4d1333 MS |
5678 | return note_data; |
5679 | } | |
5680 | ||
5681 | struct procfs_corefile_thread_data { | |
5682 | bfd *obfd; | |
5683 | char *note_data; | |
5684 | int *note_size; | |
2020b7ab | 5685 | enum target_signal stop_signal; |
be4d1333 MS |
5686 | }; |
5687 | ||
5688 | static int | |
65554fef | 5689 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5690 | { |
5691 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5692 | |
2689673f | 5693 | if (pi != NULL) |
be4d1333 | 5694 | { |
75125405 DJ |
5695 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
5696 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, | |
19958708 | 5697 | args->note_data, |
2020b7ab PA |
5698 | args->note_size, |
5699 | args->stop_signal); | |
be4d1333 MS |
5700 | } |
5701 | return 0; | |
5702 | } | |
5703 | ||
a223f1e7 JB |
5704 | static int |
5705 | find_signalled_thread (struct thread_info *info, void *data) | |
5706 | { | |
5707 | if (info->stop_signal != TARGET_SIGNAL_0 | |
5708 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
5709 | return 1; | |
5710 | ||
5711 | return 0; | |
5712 | } | |
5713 | ||
5714 | static enum target_signal | |
5715 | find_stop_signal (void) | |
5716 | { | |
5717 | struct thread_info *info = | |
5718 | iterate_over_threads (find_signalled_thread, NULL); | |
5719 | ||
5720 | if (info) | |
5721 | return info->stop_signal; | |
5722 | else | |
5723 | return TARGET_SIGNAL_0; | |
5724 | } | |
5725 | ||
be4d1333 MS |
5726 | static char * |
5727 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5728 | { | |
5729 | struct cleanup *old_chain; | |
5730 | gdb_gregset_t gregs; | |
5731 | gdb_fpregset_t fpregs; | |
5732 | char fname[16] = {'\0'}; | |
5733 | char psargs[80] = {'\0'}; | |
5734 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5735 | char *note_data = NULL; | |
6dbdc4a3 | 5736 | char *inf_args; |
be4d1333 | 5737 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5738 | gdb_byte *auxv; |
4e73f23d | 5739 | int auxv_len; |
651c8d2d | 5740 | enum target_signal stop_signal; |
be4d1333 MS |
5741 | |
5742 | if (get_exec_file (0)) | |
5743 | { | |
5744 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 5745 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 5746 | sizeof (psargs)); |
6dbdc4a3 MS |
5747 | |
5748 | inf_args = get_inferior_args (); | |
5749 | if (inf_args && *inf_args && | |
5750 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5751 | { |
19958708 | 5752 | strncat (psargs, " ", |
be4d1333 | 5753 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5754 | strncat (psargs, inf_args, |
be4d1333 MS |
5755 | sizeof (psargs) - strlen (psargs)); |
5756 | } | |
5757 | } | |
5758 | ||
19958708 RM |
5759 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5760 | note_data, | |
5761 | note_size, | |
5762 | fname, | |
be4d1333 MS |
5763 | psargs); |
5764 | ||
651c8d2d PA |
5765 | stop_signal = find_stop_signal (); |
5766 | ||
8903eff6 | 5767 | #ifdef UNIXWARE |
594f7785 | 5768 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5769 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5770 | PIDGET (inferior_ptid), | |
65554fef MS |
5771 | stop_signal, &gregs); |
5772 | #endif | |
5773 | ||
be4d1333 MS |
5774 | thread_args.obfd = obfd; |
5775 | thread_args.note_data = note_data; | |
5776 | thread_args.note_size = note_size; | |
651c8d2d | 5777 | thread_args.stop_signal = stop_signal; |
65554fef MS |
5778 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
5779 | ||
2689673f PA |
5780 | /* There should be always at least one thread. */ |
5781 | gdb_assert (thread_args.note_data != note_data); | |
5782 | note_data = thread_args.note_data; | |
be4d1333 | 5783 | |
13547ab6 DJ |
5784 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5785 | NULL, &auxv); | |
4e73f23d RM |
5786 | if (auxv_len > 0) |
5787 | { | |
5788 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5789 | "CORE", NT_AUXV, auxv, auxv_len); | |
5790 | xfree (auxv); | |
5791 | } | |
5792 | ||
be4d1333 MS |
5793 | make_cleanup (xfree, note_data); |
5794 | return note_data; | |
5795 | } | |
65554fef MS |
5796 | #else /* !(Solaris or Unixware) */ |
5797 | static char * | |
5798 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5799 | { | |
8a3fe4f8 | 5800 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5801 | return NULL; /* lint */ |
5802 | } | |
5803 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5804 | /* =================== END GCORE .NOTE "MODULE" =================== */ |