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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
ecd75fc8 | 3 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
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 | 34 | #if defined (NEW_PROC_API) |
0df8b418 | 35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 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> | |
92107356 | 49 | #include "gdb_bfd.h" |
0e9f083f | 50 | #include <string.h> |
df8f7274 | 51 | #include "gdb_assert.h" |
44270758 | 52 | #include "inflow.h" |
4e73f23d | 53 | #include "auxv.h" |
d1a7880c | 54 | #include "procfs.h" |
27087a3d | 55 | #include "observer.h" |
0fda6bd2 | 56 | |
77382aee PA |
57 | /* This module provides the interface between GDB and the |
58 | /proc file system, which is used on many versions of Unix | |
59 | as a means for debuggers to control other processes. | |
60 | ||
61 | Examples of the systems that use this interface are: | |
62 | ||
63 | Irix | |
64 | Solaris | |
65 | OSF | |
77382aee PA |
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> |
2978b111 | 93 | #include <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" */ | |
53ce3c39 | 98 | #include <sys/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 | |
c0939df1 | 113 | static void procfs_attach (struct target_ops *, const char *, int); |
52554a0e | 114 | static void procfs_detach (struct target_ops *, const char *, int); |
28439f5e | 115 | static void procfs_resume (struct target_ops *, |
2ea28649 | 116 | ptid_t, int, enum gdb_signal); |
1eab8a48 | 117 | static void procfs_stop (struct target_ops *self, 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); | |
94bedb42 TT |
123 | static void procfs_pass_signals (struct target_ops *self, |
124 | int, unsigned char *); | |
7d85a9c0 | 125 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 126 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 127 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 128 | char *, char **, int); |
117de6a9 | 129 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 130 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
131 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
132 | const gdb_byte *, | |
133 | ULONGEST, ULONGEST, | |
134 | ULONGEST *); | |
4ac248ca | 135 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 136 | |
28439f5e | 137 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 138 | |
d3581e61 JB |
139 | static void procfs_find_new_threads (struct target_ops *ops); |
140 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); | |
c3f6f71d | 141 | |
2e73927c TT |
142 | static int proc_find_memory_regions (struct target_ops *self, |
143 | find_memory_region_ftype, void *); | |
be4d1333 | 144 | |
fc6691b2 TT |
145 | static char * procfs_make_note_section (struct target_ops *self, |
146 | bfd *, int *); | |
be4d1333 | 147 | |
5461485a TT |
148 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
149 | int, int, int); | |
1e03ad20 | 150 | |
7bc112c1 | 151 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
152 | enum info_proc_what); |
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 | { |
f5656ead | 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_create_inferior = procfs_create_inferior; |
189 | t->to_kill = procfs_kill_inferior; | |
190 | t->to_mourn_inferior = procfs_mourn_inferior; | |
191 | t->to_attach = procfs_attach; | |
192 | t->to_detach = procfs_detach; | |
193 | t->to_wait = procfs_wait; | |
194 | t->to_resume = procfs_resume; | |
195 | t->to_fetch_registers = procfs_fetch_registers; | |
196 | t->to_store_registers = procfs_store_registers; | |
197 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 198 | t->to_pass_signals = procfs_pass_signals; |
77382aee PA |
199 | t->to_files_info = procfs_files_info; |
200 | t->to_stop = procfs_stop; | |
28439f5e | 201 | |
77382aee PA |
202 | t->to_find_new_threads = procfs_find_new_threads; |
203 | t->to_thread_alive = procfs_thread_alive; | |
204 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 205 | |
77382aee | 206 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
207 | t->to_find_memory_regions = proc_find_memory_regions; |
208 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 209 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
210 | |
211 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 212 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
213 | #endif |
214 | ||
77382aee | 215 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
216 | |
217 | return t; | |
c3f6f71d | 218 | } |
c906108c | 219 | |
c3f6f71d JM |
220 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
221 | ||
77382aee PA |
222 | /* World Unification: |
223 | ||
224 | Put any typedefs, defines etc. here that are required for the | |
225 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
226 | |
227 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 228 | #ifdef WA_READ |
19958708 | 229 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
230 | WRITE_WATCHFLAG = WA_WRITE, |
231 | EXEC_WATCHFLAG = WA_EXEC, | |
232 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
233 | }; | |
234 | #endif | |
235 | #else /* Irix method for watchpoints */ | |
19958708 | 236 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
237 | WRITE_WATCHFLAG = MA_WRITE, |
238 | EXEC_WATCHFLAG = MA_EXEC, | |
239 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
240 | }; | |
241 | #endif | |
242 | ||
37de36c6 KB |
243 | /* gdb_sigset_t */ |
244 | #ifdef HAVE_PR_SIGSET_T | |
245 | typedef pr_sigset_t gdb_sigset_t; | |
246 | #else | |
247 | typedef sigset_t gdb_sigset_t; | |
248 | #endif | |
249 | ||
250 | /* sigaction */ | |
251 | #ifdef HAVE_PR_SIGACTION64_T | |
252 | typedef pr_sigaction64_t gdb_sigaction_t; | |
253 | #else | |
254 | typedef struct sigaction gdb_sigaction_t; | |
255 | #endif | |
256 | ||
257 | /* siginfo */ | |
258 | #ifdef HAVE_PR_SIGINFO64_T | |
259 | typedef pr_siginfo64_t gdb_siginfo_t; | |
260 | #else | |
a5362b9a | 261 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
262 | #endif |
263 | ||
3c95f01c JB |
264 | /* On mips-irix, praddset and prdelset are defined in such a way that |
265 | they return a value, which causes GCC to emit a -Wunused error | |
266 | because the returned value is not used. Prevent this warning | |
267 | by casting the return value to void. On sparc-solaris, this issue | |
268 | does not exist because the definition of these macros already include | |
269 | that cast to void. */ | |
270 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
271 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
272 | ||
37de36c6 KB |
273 | /* gdb_premptysysset */ |
274 | #ifdef premptysysset | |
275 | #define gdb_premptysysset premptysysset | |
276 | #else | |
277 | #define gdb_premptysysset premptyset | |
278 | #endif | |
279 | ||
280 | /* praddsysset */ | |
281 | #ifdef praddsysset | |
282 | #define gdb_praddsysset praddsysset | |
283 | #else | |
3c95f01c | 284 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
285 | #endif |
286 | ||
287 | /* prdelsysset */ | |
288 | #ifdef prdelsysset | |
289 | #define gdb_prdelsysset prdelsysset | |
290 | #else | |
3c95f01c | 291 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
292 | #endif |
293 | ||
294 | /* prissyssetmember */ | |
295 | #ifdef prissyssetmember | |
296 | #define gdb_pr_issyssetmember prissyssetmember | |
297 | #else | |
298 | #define gdb_pr_issyssetmember prismember | |
299 | #endif | |
300 | ||
301 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
302 | as intuitively descriptive as it could be, so we'll define | |
303 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
304 | this writing, this feature is only found on AIX5 systems and | |
305 | basically means that the set of syscalls is not fixed. I.e, | |
306 | there's no nice table that one can #include to get all of the | |
307 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
308 | for each process. We are at least guaranteed that they won't | |
309 | change over the lifetime of the process. But each process could | |
77382aee | 310 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
311 | #ifdef HAVE_PRSYSENT_T |
312 | #define DYNAMIC_SYSCALLS | |
313 | #endif | |
c3f6f71d JM |
314 | |
315 | ||
316 | ||
317 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
318 | ||
319 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
320 | ||
321 | /* The procinfo struct is a wrapper to hold all the state information | |
322 | concerning a /proc process. There should be exactly one procinfo | |
323 | for each process, and since GDB currently can debug only one | |
324 | process at a time, that means there should be only one procinfo. | |
325 | All of the LWP's of a process can be accessed indirectly thru the | |
326 | single process procinfo. | |
327 | ||
328 | However, against the day when GDB may debug more than one process, | |
329 | this data structure is kept in a list (which for now will hold no | |
330 | more than one member), and many functions will have a pointer to a | |
331 | procinfo as an argument. | |
332 | ||
333 | There will be a separate procinfo structure for use by the (not yet | |
334 | implemented) "info proc" command, so that we can print useful | |
335 | information about any random process without interfering with the | |
0df8b418 | 336 | inferior's procinfo information. */ |
c3f6f71d JM |
337 | |
338 | #ifdef NEW_PROC_API | |
339 | /* format strings for /proc paths */ | |
340 | # ifndef CTL_PROC_NAME_FMT | |
341 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
342 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
343 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
344 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
345 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
346 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
347 | # endif | |
348 | /* the name of the proc status struct depends on the implementation */ | |
349 | typedef pstatus_t gdb_prstatus_t; | |
350 | typedef lwpstatus_t gdb_lwpstatus_t; | |
351 | #else /* ! NEW_PROC_API */ | |
352 | /* format strings for /proc paths */ | |
353 | # ifndef CTL_PROC_NAME_FMT | |
354 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
355 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
356 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
357 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
358 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
359 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
360 | # endif | |
0df8b418 | 361 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 362 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
363 | typedef prstatus_t gdb_lwpstatus_t; |
364 | #endif /* NEW_PROC_API */ | |
c906108c | 365 | |
c3f6f71d JM |
366 | typedef struct procinfo { |
367 | struct procinfo *next; | |
368 | int pid; /* Process ID */ | |
369 | int tid; /* Thread/LWP id */ | |
c906108c | 370 | |
c3f6f71d JM |
371 | /* process state */ |
372 | int was_stopped; | |
373 | int ignore_next_sigstop; | |
c906108c | 374 | |
19958708 | 375 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
376 | several different fd's, depending on the version of /proc |
377 | (old ioctl or new read/write). */ | |
c906108c | 378 | |
c3f6f71d | 379 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
380 | |
381 | /* The next three file descriptors are actually only needed in the | |
382 | read/write, multiple-file-descriptor implemenation | |
383 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
384 | code, we will use them uniformly by (in the case of the ioctl | |
385 | single-file-descriptor implementation) filling them with copies | |
386 | of the control fd. */ | |
c3f6f71d JM |
387 | int status_fd; /* File descriptor for /proc status file */ |
388 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 389 | |
c3f6f71d | 390 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 391 | |
c3f6f71d | 392 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
393 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
394 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
395 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
396 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 397 | |
c3f6f71d | 398 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 399 | |
c3f6f71d JM |
400 | #ifndef NEW_PROC_API |
401 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 402 | #endif |
37de36c6 KB |
403 | |
404 | #ifdef DYNAMIC_SYSCALLS | |
405 | int num_syscalls; /* Total number of syscalls */ | |
406 | char **syscall_names; /* Syscall number to name map */ | |
407 | #endif | |
19958708 | 408 | |
c3f6f71d | 409 | struct procinfo *thread_list; |
c906108c | 410 | |
c3f6f71d JM |
411 | int status_valid : 1; |
412 | int gregs_valid : 1; | |
413 | int fpregs_valid : 1; | |
414 | int threads_valid: 1; | |
415 | } procinfo; | |
c906108c | 416 | |
c3f6f71d | 417 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 418 | |
c3f6f71d | 419 | /* Function prototypes for procinfo module: */ |
c906108c | 420 | |
a14ed312 KB |
421 | static procinfo *find_procinfo_or_die (int pid, int tid); |
422 | static procinfo *find_procinfo (int pid, int tid); | |
423 | static procinfo *create_procinfo (int pid, int tid); | |
424 | static void destroy_procinfo (procinfo * p); | |
004527cb | 425 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
426 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
427 | static int open_procinfo_files (procinfo * p, int which); | |
428 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
429 | static int sysset_t_size (procinfo *p); |
430 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
431 | #ifdef DYNAMIC_SYSCALLS | |
432 | static void load_syscalls (procinfo *pi); | |
433 | static void free_syscalls (procinfo *pi); | |
434 | static int find_syscall (procinfo *pi, char *name); | |
435 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 436 | |
e9ef4f39 | 437 | static int iterate_over_mappings |
b8edc417 JK |
438 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
439 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 440 | void *data)); |
e9ef4f39 | 441 | |
c3f6f71d JM |
442 | /* The head of the procinfo list: */ |
443 | static procinfo * procinfo_list; | |
c906108c | 444 | |
77382aee PA |
445 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
446 | not found. */ | |
c906108c | 447 | |
19958708 | 448 | static procinfo * |
fba45db2 | 449 | find_procinfo (int pid, int tid) |
c5aa993b | 450 | { |
c3f6f71d | 451 | procinfo *pi; |
c906108c | 452 | |
c3f6f71d JM |
453 | for (pi = procinfo_list; pi; pi = pi->next) |
454 | if (pi->pid == pid) | |
455 | break; | |
c906108c | 456 | |
c3f6f71d JM |
457 | if (pi) |
458 | if (tid) | |
459 | { | |
460 | /* Don't check threads_valid. If we're updating the | |
461 | thread_list, we want to find whatever threads are already | |
462 | here. This means that in general it is the caller's | |
463 | responsibility to check threads_valid and update before | |
464 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 465 | thread. */ |
c3f6f71d JM |
466 | |
467 | for (pi = pi->thread_list; pi; pi = pi->next) | |
468 | if (pi->tid == tid) | |
469 | break; | |
470 | } | |
c906108c | 471 | |
c3f6f71d JM |
472 | return pi; |
473 | } | |
c906108c | 474 | |
77382aee | 475 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 476 | |
c3f6f71d | 477 | static procinfo * |
fba45db2 | 478 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
479 | { |
480 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 481 | |
c3f6f71d | 482 | if (pi == NULL) |
0fda6bd2 JM |
483 | { |
484 | if (tid) | |
3e43a32a MS |
485 | error (_("procfs: couldn't find pid %d " |
486 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
487 | pid, tid); |
488 | else | |
8a3fe4f8 | 489 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 490 | } |
c3f6f71d JM |
491 | return pi; |
492 | } | |
c906108c | 493 | |
77382aee PA |
494 | /* Wrapper for `open'. The appropriate open call is attempted; if |
495 | unsuccessful, it will be retried as many times as needed for the | |
496 | EAGAIN and EINTR conditions. | |
19958708 | 497 | |
77382aee PA |
498 | For other conditions, retry the open a limited number of times. In |
499 | addition, a short sleep is imposed prior to retrying the open. The | |
500 | reason for this sleep is to give the kernel a chance to catch up | |
501 | and create the file in question in the event that GDB "wins" the | |
502 | race to open a file before the kernel has created it. */ | |
19958708 | 503 | |
4d1bcd09 KB |
504 | static int |
505 | open_with_retry (const char *pathname, int flags) | |
506 | { | |
507 | int retries_remaining, status; | |
508 | ||
509 | retries_remaining = 2; | |
510 | ||
511 | while (1) | |
512 | { | |
513 | status = open (pathname, flags); | |
514 | ||
515 | if (status >= 0 || retries_remaining == 0) | |
516 | break; | |
517 | else if (errno != EINTR && errno != EAGAIN) | |
518 | { | |
519 | retries_remaining--; | |
520 | sleep (1); | |
521 | } | |
522 | } | |
523 | ||
524 | return status; | |
525 | } | |
526 | ||
77382aee PA |
527 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
528 | is defined, we only open the control file descriptor; the others | |
529 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
530 | there is only one real file descriptor, but we keep multiple copies | |
531 | of it so that the code that uses them does not have to be #ifdef'd. | |
532 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 533 | |
c3f6f71d | 534 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 535 | |
c3f6f71d | 536 | static int |
fba45db2 | 537 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 538 | { |
0fda6bd2 | 539 | #ifdef NEW_PROC_API |
c3f6f71d | 540 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 541 | #endif |
c3f6f71d JM |
542 | int fd; |
543 | ||
77382aee PA |
544 | /* This function is getting ALMOST long enough to break up into |
545 | several. Here is some rationale: | |
546 | ||
05b4bd79 | 547 | NEW_PROC_API (Solaris 2.6, Solaris 2.7): |
77382aee PA |
548 | There are several file descriptors that may need to be open |
549 | for any given process or LWP. The ones we're intereted in are: | |
550 | - control (ctl) write-only change the state | |
551 | - status (status) read-only query the state | |
552 | - address space (as) read/write access memory | |
553 | - map (map) read-only virtual addr map | |
554 | Most of these are opened lazily as they are needed. | |
555 | The pathnames for the 'files' for an LWP look slightly | |
556 | different from those of a first-class process: | |
557 | Pathnames for a process (<proc-id>): | |
558 | /proc/<proc-id>/ctl | |
559 | /proc/<proc-id>/status | |
560 | /proc/<proc-id>/as | |
561 | /proc/<proc-id>/map | |
562 | Pathnames for an LWP (lwp-id): | |
563 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
564 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
565 | An LWP has no map or address space file descriptor, since | |
566 | the memory map and address space are shared by all LWPs. | |
567 | ||
568 | Everyone else (Solaris 2.5, Irix, OSF) | |
569 | There is only one file descriptor for each process or LWP. | |
570 | For convenience, we copy the same file descriptor into all | |
571 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
572 | as_fd, see NEW_PROC_API above) so that code that uses them | |
573 | doesn't need any #ifdef's. | |
574 | Pathname for all: | |
575 | /proc/<proc-id> | |
576 | ||
577 | Solaris 2.5 LWP's: | |
578 | Each LWP has an independent file descriptor, but these | |
579 | are not obtained via the 'open' system call like the rest: | |
580 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
581 | to the file descriptor of the parent process. | |
582 | ||
583 | OSF threads: | |
584 | These do not even have their own independent file descriptor. | |
585 | All operations are carried out on the file descriptor of the | |
586 | parent process. Therefore we just call open again for each | |
0df8b418 | 587 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
588 | |
589 | #ifdef NEW_PROC_API | |
77382aee PA |
590 | /* In this case, there are several different file descriptors that |
591 | we might be asked to open. The control file descriptor will be | |
592 | opened early, but the others will be opened lazily as they are | |
593 | needed. */ | |
c3f6f71d JM |
594 | |
595 | strcpy (tmp, pi->pathname); | |
0df8b418 | 596 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
597 | case FD_CTL: |
598 | if (pi->tid) | |
599 | strcat (tmp, "/lwpctl"); | |
600 | else | |
601 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 602 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 603 | if (fd < 0) |
c3f6f71d JM |
604 | return 0; /* fail */ |
605 | pi->ctl_fd = fd; | |
606 | break; | |
607 | case FD_AS: | |
608 | if (pi->tid) | |
0df8b418 | 609 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 610 | strcat (tmp, "/as"); |
4d1bcd09 | 611 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 612 | if (fd < 0) |
c3f6f71d JM |
613 | return 0; /* fail */ |
614 | pi->as_fd = fd; | |
615 | break; | |
616 | case FD_STATUS: | |
617 | if (pi->tid) | |
618 | strcat (tmp, "/lwpstatus"); | |
619 | else | |
620 | strcat (tmp, "/status"); | |
4d1bcd09 | 621 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 622 | if (fd < 0) |
c3f6f71d JM |
623 | return 0; /* fail */ |
624 | pi->status_fd = fd; | |
625 | break; | |
626 | default: | |
627 | return 0; /* unknown file descriptor */ | |
628 | } | |
629 | #else /* not NEW_PROC_API */ | |
77382aee PA |
630 | /* In this case, there is only one file descriptor for each procinfo |
631 | (ie. each process or LWP). In fact, only the file descriptor for | |
632 | the process can actually be opened by an 'open' system call. The | |
633 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
634 | process's file descriptor. | |
635 | ||
636 | For convenience, we copy each procinfo's single file descriptor | |
637 | into all of the fields occupied by the several file descriptors | |
638 | of the NEW_PROC_API implementation. That way, the code that uses | |
639 | them can be written without ifdefs. */ | |
c3f6f71d JM |
640 | |
641 | ||
642 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 643 | /* Only one FD; just open it. */ |
e28cade7 | 644 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 645 | return 0; |
0df8b418 | 646 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
647 | if (pi->tid == 0) /* Master procinfo for the process */ |
648 | { | |
4d1bcd09 | 649 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 650 | if (fd < 0) |
c3f6f71d JM |
651 | return 0; /* fail */ |
652 | } | |
653 | else /* LWP thread procinfo */ | |
654 | { | |
655 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
656 | procinfo *process; | |
657 | int lwpid = pi->tid; | |
658 | ||
0df8b418 | 659 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
660 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
661 | return 0; /* fail */ | |
662 | ||
0df8b418 | 663 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 664 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 665 | return 0; /* fail */ |
0df8b418 MS |
666 | #else /* Irix, other? */ |
667 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
668 | #endif /* Sol 2.5 PIOCOPENLWP */ |
669 | } | |
670 | #endif /* OSF PIOCTSTATUS */ | |
671 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
672 | #endif /* NEW_PROC_API */ | |
c906108c | 673 | |
c3f6f71d JM |
674 | return 1; /* success */ |
675 | } | |
c906108c | 676 | |
77382aee PA |
677 | /* Allocate a data structure and link it into the procinfo list. |
678 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
679 | pointer to new procinfo struct. */ | |
c906108c | 680 | |
c3f6f71d | 681 | static procinfo * |
fba45db2 | 682 | create_procinfo (int pid, int tid) |
c3f6f71d | 683 | { |
0b62613e | 684 | procinfo *pi, *parent = NULL; |
c906108c | 685 | |
0d06e24b | 686 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 687 | return pi; /* Already exists, nothing to do. */ |
c906108c | 688 | |
0df8b418 | 689 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
690 | if (tid != 0) |
691 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
692 | create it if it | |
0df8b418 | 693 | doesn't exist yet? */ |
c906108c | 694 | |
c3f6f71d JM |
695 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
696 | memset (pi, 0, sizeof (procinfo)); | |
697 | pi->pid = pid; | |
698 | pi->tid = tid; | |
c906108c | 699 | |
37de36c6 KB |
700 | #ifdef DYNAMIC_SYSCALLS |
701 | load_syscalls (pi); | |
702 | #endif | |
703 | ||
1d5e0602 KB |
704 | pi->saved_entryset = sysset_t_alloc (pi); |
705 | pi->saved_exitset = sysset_t_alloc (pi); | |
706 | ||
c3f6f71d JM |
707 | /* Chain into list. */ |
708 | if (tid == 0) | |
709 | { | |
710 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
711 | pi->next = procinfo_list; | |
712 | procinfo_list = pi; | |
713 | } | |
714 | else | |
715 | { | |
716 | #ifdef NEW_PROC_API | |
717 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
718 | #else | |
719 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
720 | #endif | |
721 | pi->next = parent->thread_list; | |
722 | parent->thread_list = pi; | |
723 | } | |
724 | return pi; | |
725 | } | |
c906108c | 726 | |
77382aee | 727 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 728 | |
c3f6f71d | 729 | static void |
fba45db2 | 730 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
731 | { |
732 | if (pi->ctl_fd > 0) | |
733 | close (pi->ctl_fd); | |
734 | #ifdef NEW_PROC_API | |
735 | if (pi->as_fd > 0) | |
736 | close (pi->as_fd); | |
737 | if (pi->status_fd > 0) | |
738 | close (pi->status_fd); | |
739 | #endif | |
740 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
741 | } | |
c906108c | 742 | |
77382aee | 743 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 744 | |
c3f6f71d | 745 | static void |
fba45db2 | 746 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
747 | { |
748 | procinfo *ptr; | |
749 | ||
77382aee | 750 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
751 | if (pi == *list) |
752 | *list = pi->next; | |
19958708 | 753 | else |
c3f6f71d JM |
754 | for (ptr = *list; ptr; ptr = ptr->next) |
755 | if (ptr->next == pi) | |
756 | { | |
757 | ptr->next = pi->next; | |
758 | break; | |
759 | } | |
7a292a7a | 760 | |
77382aee | 761 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 762 | close_procinfo_files (pi); |
7a292a7a | 763 | |
77382aee | 764 | /* Step three: free the memory. */ |
37de36c6 KB |
765 | #ifdef DYNAMIC_SYSCALLS |
766 | free_syscalls (pi); | |
767 | #endif | |
1d5e0602 KB |
768 | xfree (pi->saved_entryset); |
769 | xfree (pi->saved_exitset); | |
b8c9b27d | 770 | xfree (pi); |
c3f6f71d | 771 | } |
c906108c | 772 | |
c3f6f71d | 773 | static void |
fba45db2 | 774 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
775 | { |
776 | procinfo *tmp; | |
c906108c | 777 | |
0df8b418 | 778 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 779 | { |
0df8b418 | 780 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
781 | destroy_one_procinfo (&tmp->thread_list, pi); |
782 | } | |
0df8b418 | 783 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
784 | { |
785 | /* First destroy the children, if any; */ | |
786 | while (pi->thread_list != NULL) | |
787 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
788 | /* Then destroy the parent. Genocide!!! */ | |
789 | destroy_one_procinfo (&procinfo_list, pi); | |
790 | } | |
791 | } | |
c906108c | 792 | |
004527cb AC |
793 | static void |
794 | do_destroy_procinfo_cleanup (void *pi) | |
795 | { | |
796 | destroy_procinfo (pi); | |
797 | } | |
798 | ||
c3f6f71d | 799 | enum { NOKILL, KILL }; |
c906108c | 800 | |
77382aee PA |
801 | /* To be called on a non_recoverable error for a procinfo. Prints |
802 | error messages, optionally sends a SIGKILL to the process, then | |
803 | destroys the data structure. */ | |
c906108c | 804 | |
c3f6f71d | 805 | static void |
fba45db2 | 806 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
807 | { |
808 | char procfile[80]; | |
c906108c | 809 | |
c3f6f71d JM |
810 | if (pi->pathname) |
811 | { | |
812 | print_sys_errmsg (pi->pathname, errno); | |
813 | } | |
814 | else | |
815 | { | |
816 | sprintf (procfile, "process %d", pi->pid); | |
817 | print_sys_errmsg (procfile, errno); | |
818 | } | |
819 | if (kill_p == KILL) | |
820 | kill (pi->pid, SIGKILL); | |
c906108c | 821 | |
c3f6f71d | 822 | destroy_procinfo (pi); |
0b62613e | 823 | error ("%s", msg); |
c3f6f71d | 824 | } |
c906108c | 825 | |
77382aee PA |
826 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
827 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
828 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
829 | |
830 | static int | |
831 | sysset_t_size (procinfo * pi) | |
832 | { | |
833 | #ifndef DYNAMIC_SYSCALLS | |
834 | return sizeof (sysset_t); | |
835 | #else | |
836 | return sizeof (sysset_t) - sizeof (uint64_t) | |
837 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
838 | / (8 * sizeof (uint64_t))); | |
839 | #endif | |
840 | } | |
841 | ||
77382aee | 842 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
843 | |
844 | static sysset_t * | |
845 | sysset_t_alloc (procinfo * pi) | |
846 | { | |
847 | sysset_t *ret; | |
848 | int size = sysset_t_size (pi); | |
f4a14ae6 | 849 | |
37de36c6 KB |
850 | ret = xmalloc (size); |
851 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
852 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
853 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
854 | #endif |
855 | return ret; | |
856 | } | |
857 | ||
858 | #ifdef DYNAMIC_SYSCALLS | |
859 | ||
77382aee | 860 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
861 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
862 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 863 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
864 | |
865 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
866 | #define MAX_SYSCALLS 65536 | |
867 | ||
868 | static void | |
869 | load_syscalls (procinfo *pi) | |
870 | { | |
871 | char pathname[MAX_PROC_NAME_SIZE]; | |
872 | int sysent_fd; | |
873 | prsysent_t header; | |
874 | prsyscall_t *syscalls; | |
875 | int i, size, maxcall; | |
e28cade7 | 876 | struct cleanup *cleanups; |
37de36c6 KB |
877 | |
878 | pi->num_syscalls = 0; | |
879 | pi->syscall_names = 0; | |
880 | ||
77382aee | 881 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 882 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 883 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
884 | if (sysent_fd < 0) |
885 | { | |
8a3fe4f8 | 886 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 887 | } |
e28cade7 | 888 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
889 | |
890 | size = sizeof header - sizeof (prsyscall_t); | |
891 | if (read (sysent_fd, &header, size) != size) | |
892 | { | |
8a3fe4f8 | 893 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
894 | } |
895 | ||
896 | if (header.pr_nsyscalls == 0) | |
897 | { | |
3e43a32a MS |
898 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
899 | pi->pid); | |
37de36c6 KB |
900 | } |
901 | ||
902 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
903 | syscalls = xmalloc (size); | |
e28cade7 | 904 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
905 | |
906 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 907 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
908 | |
909 | /* Find maximum syscall number. This may not be the same as | |
910 | pr_nsyscalls since that value refers to the number of entries | |
911 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 912 | call numbers may be skipped.) */ |
37de36c6 KB |
913 | |
914 | maxcall = syscalls[0].pr_number; | |
915 | ||
916 | for (i = 1; i < header.pr_nsyscalls; i++) | |
917 | if (syscalls[i].pr_number > maxcall | |
77382aee | 918 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
919 | && syscalls[i].pr_number < MAX_SYSCALLS) |
920 | maxcall = syscalls[i].pr_number; | |
921 | ||
922 | pi->num_syscalls = maxcall+1; | |
923 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
924 | ||
925 | for (i = 0; i < pi->num_syscalls; i++) | |
926 | pi->syscall_names[i] = NULL; | |
927 | ||
77382aee | 928 | /* Read the syscall names in. */ |
37de36c6 KB |
929 | for (i = 0; i < header.pr_nsyscalls; i++) |
930 | { | |
931 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
932 | int nread; | |
933 | int callnum; | |
934 | ||
935 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 936 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
937 | || syscalls[i].pr_nameoff <= 0 |
938 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 939 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
940 | continue; |
941 | ||
942 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
943 | if (nread <= 0) | |
944 | continue; | |
945 | ||
946 | callnum = syscalls[i].pr_number; | |
947 | ||
948 | if (pi->syscall_names[callnum] != NULL) | |
949 | { | |
0df8b418 | 950 | /* FIXME: Generate warning. */ |
37de36c6 KB |
951 | continue; |
952 | } | |
953 | ||
954 | namebuf[nread-1] = '\0'; | |
955 | size = strlen (namebuf) + 1; | |
956 | pi->syscall_names[callnum] = xmalloc (size); | |
957 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
958 | pi->syscall_names[callnum][size-1] = '\0'; | |
959 | } | |
19958708 | 960 | |
e28cade7 | 961 | do_cleanups (cleanups); |
37de36c6 KB |
962 | } |
963 | ||
77382aee | 964 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
965 | structure. */ |
966 | ||
967 | static void | |
968 | free_syscalls (procinfo *pi) | |
969 | { | |
970 | if (pi->syscall_names) | |
971 | { | |
972 | int i; | |
973 | ||
974 | for (i = 0; i < pi->num_syscalls; i++) | |
975 | if (pi->syscall_names[i] != NULL) | |
976 | xfree (pi->syscall_names[i]); | |
977 | ||
978 | xfree (pi->syscall_names); | |
979 | pi->syscall_names = 0; | |
980 | } | |
981 | } | |
982 | ||
77382aee | 983 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 984 | If no match is found, return -1. */ |
19958708 | 985 | |
37de36c6 KB |
986 | static int |
987 | find_syscall (procinfo *pi, char *name) | |
988 | { | |
989 | int i; | |
f4a14ae6 | 990 | |
37de36c6 KB |
991 | for (i = 0; i < pi->num_syscalls; i++) |
992 | { | |
993 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
994 | return i; | |
995 | } | |
996 | return -1; | |
997 | } | |
998 | #endif | |
999 | ||
c3f6f71d | 1000 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1001 | |
c3f6f71d | 1002 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1003 | |
77382aee PA |
1004 | /* This "module" is the interface layer between the /proc system API |
1005 | and the gdb target vector functions. This layer consists of access | |
1006 | functions that encapsulate each of the basic operations that we | |
1007 | need to use from the /proc API. | |
1008 | ||
1009 | The main motivation for this layer is to hide the fact that there | |
1010 | are two very different implementations of the /proc API. Rather | |
1011 | than have a bunch of #ifdefs all thru the gdb target vector | |
1012 | functions, we do our best to hide them all in here. */ | |
c906108c | 1013 | |
d3581e61 JB |
1014 | static long proc_flags (procinfo * pi); |
1015 | static int proc_why (procinfo * pi); | |
1016 | static int proc_what (procinfo * pi); | |
1017 | static int proc_set_current_signal (procinfo * pi, int signo); | |
1018 | static int proc_get_current_thread (procinfo * pi); | |
1019 | static int proc_iterate_over_threads | |
1020 | (procinfo * pi, | |
1021 | int (*func) (procinfo *, procinfo *, void *), | |
1022 | void *ptr); | |
1023 | ||
1024 | static void | |
fba45db2 | 1025 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1026 | { |
1027 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1028 | print_sys_errmsg (errmsg, errno); | |
1029 | } | |
c906108c | 1030 | |
d3581e61 | 1031 | static void |
fba45db2 | 1032 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1033 | { |
1034 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1035 | perror_with_name (errmsg); | |
1036 | } | |
c906108c | 1037 | |
77382aee PA |
1038 | /* Updates the status struct in the procinfo. There is a 'valid' |
1039 | flag, to let other functions know when this function needs to be | |
1040 | called (so the status is only read when it is needed). The status | |
1041 | file descriptor is also only opened when it is needed. Returns | |
1042 | non-zero for success, zero for failure. */ | |
c906108c | 1043 | |
d3581e61 | 1044 | static int |
fba45db2 | 1045 | proc_get_status (procinfo *pi) |
c3f6f71d | 1046 | { |
0df8b418 | 1047 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1048 | if (pi->status_fd == 0 && |
1049 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1050 | { | |
1051 | pi->status_valid = 0; | |
1052 | return 0; | |
1053 | } | |
c906108c | 1054 | |
c3f6f71d JM |
1055 | #ifdef NEW_PROC_API |
1056 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1057 | pi->status_valid = 0; /* fail */ | |
1058 | else | |
1059 | { | |
19958708 | 1060 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1061 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1062 | if (pi->tid) |
19958708 RM |
1063 | pi->status_valid = (read (pi->status_fd, |
1064 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1065 | sizeof (lwpstatus_t)) |
1066 | == sizeof (lwpstatus_t)); | |
1067 | else | |
1068 | { | |
19958708 | 1069 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1070 | (char *) &pi->prstatus, |
1071 | sizeof (gdb_prstatus_t)) | |
1072 | == sizeof (gdb_prstatus_t)); | |
c3f6f71d JM |
1073 | } |
1074 | } | |
1075 | #else /* ioctl method */ | |
1076 | #ifdef PIOCTSTATUS /* osf */ | |
1077 | if (pi->tid == 0) /* main process */ | |
1078 | { | |
0df8b418 | 1079 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1080 | pi->status_valid = |
c3f6f71d JM |
1081 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | int win; | |
1086 | struct { | |
1087 | long pr_count; | |
1088 | tid_t pr_error_thread; | |
1089 | struct prstatus status; | |
1090 | } thread_status; | |
1091 | ||
1092 | thread_status.pr_count = 1; | |
1093 | thread_status.status.pr_tid = pi->tid; | |
1094 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1095 | if (win) | |
1096 | { | |
19958708 | 1097 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1098 | sizeof (pi->prstatus)); |
1099 | pi->status_valid = 1; | |
1100 | } | |
1101 | } | |
1102 | #else | |
77382aee | 1103 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1104 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1105 | #endif | |
1106 | #endif | |
c906108c | 1107 | |
c3f6f71d JM |
1108 | if (pi->status_valid) |
1109 | { | |
19958708 | 1110 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1111 | proc_why (pi), |
19958708 | 1112 | proc_what (pi), |
c3f6f71d JM |
1113 | proc_get_current_thread (pi)); |
1114 | } | |
c906108c | 1115 | |
77382aee | 1116 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1117 | pi->gregs_valid = pi->status_valid; |
1118 | #ifdef NEW_PROC_API | |
77382aee PA |
1119 | /* In the read/write multiple-fd model, the status struct includes |
1120 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1121 | pi->fpregs_valid = pi->status_valid; |
1122 | #endif | |
77382aee | 1123 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1124 | } |
c906108c | 1125 | |
77382aee | 1126 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 1127 | |
d3581e61 | 1128 | static long |
fba45db2 | 1129 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1130 | { |
1131 | if (!pi->status_valid) | |
1132 | if (!proc_get_status (pi)) | |
0df8b418 | 1133 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1134 | |
c3f6f71d JM |
1135 | #ifdef NEW_PROC_API |
1136 | return pi->prstatus.pr_lwp.pr_flags; | |
1137 | #else | |
1138 | return pi->prstatus.pr_flags; | |
1139 | #endif | |
1140 | } | |
c906108c | 1141 | |
77382aee | 1142 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1143 | |
d3581e61 | 1144 | static int |
fba45db2 | 1145 | proc_why (procinfo *pi) |
c3f6f71d JM |
1146 | { |
1147 | if (!pi->status_valid) | |
1148 | if (!proc_get_status (pi)) | |
0df8b418 | 1149 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1150 | |
c3f6f71d JM |
1151 | #ifdef NEW_PROC_API |
1152 | return pi->prstatus.pr_lwp.pr_why; | |
1153 | #else | |
1154 | return pi->prstatus.pr_why; | |
1155 | #endif | |
1156 | } | |
c906108c | 1157 | |
77382aee | 1158 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1159 | |
d3581e61 | 1160 | static int |
fba45db2 | 1161 | proc_what (procinfo *pi) |
c3f6f71d JM |
1162 | { |
1163 | if (!pi->status_valid) | |
1164 | if (!proc_get_status (pi)) | |
0df8b418 | 1165 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1166 | |
c3f6f71d JM |
1167 | #ifdef NEW_PROC_API |
1168 | return pi->prstatus.pr_lwp.pr_what; | |
1169 | #else | |
1170 | return pi->prstatus.pr_what; | |
c906108c | 1171 | #endif |
c3f6f71d | 1172 | } |
c906108c | 1173 | |
77382aee PA |
1174 | /* This function is only called when PI is stopped by a watchpoint. |
1175 | Assuming the OS supports it, write to *ADDR the data address which | |
1176 | triggered it and return 1. Return 0 if it is not possible to know | |
1177 | the address. */ | |
bf701c2c PM |
1178 | |
1179 | static int | |
1180 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1181 | { | |
1182 | if (!pi->status_valid) | |
1183 | if (!proc_get_status (pi)) | |
1184 | return 0; | |
1185 | ||
1186 | #ifdef NEW_PROC_API | |
f5656ead TT |
1187 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1188 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1189 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
1190 | #else | |
f5656ead TT |
1191 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1192 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1193 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); |
1194 | #endif | |
1195 | return 1; | |
1196 | } | |
1197 | ||
c3f6f71d | 1198 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1199 | |
1200 | /* Returns the pr_nsysarg field (number of args to the current | |
1201 | syscall). */ | |
c3f6f71d | 1202 | |
d3581e61 | 1203 | static int |
fba45db2 | 1204 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1205 | { |
1206 | if (!pi->status_valid) | |
1207 | if (!proc_get_status (pi)) | |
1208 | return 0; | |
19958708 | 1209 | |
c3f6f71d JM |
1210 | #ifdef NEW_PROC_API |
1211 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1212 | #else | |
1213 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1214 | #endif |
c3f6f71d | 1215 | } |
c906108c | 1216 | |
77382aee PA |
1217 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1218 | syscall). */ | |
c906108c | 1219 | |
d3581e61 | 1220 | static long * |
fba45db2 | 1221 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1222 | { |
1223 | if (!pi->status_valid) | |
1224 | if (!proc_get_status (pi)) | |
1225 | return NULL; | |
19958708 | 1226 | |
c3f6f71d JM |
1227 | #ifdef NEW_PROC_API |
1228 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1229 | #else | |
1230 | return (long *) &pi->prstatus.pr_sysarg; | |
1231 | #endif | |
1232 | } | |
c3f6f71d | 1233 | #endif /* PIOCSSPCACT */ |
c906108c | 1234 | |
d3581e61 | 1235 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
77382aee | 1236 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1237 | |
d3581e61 | 1238 | static long |
c3f6f71d JM |
1239 | proc_cursig (struct procinfo *pi) |
1240 | { | |
1241 | if (!pi->status_valid) | |
1242 | if (!proc_get_status (pi)) | |
0df8b418 | 1243 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1244 | |
c3f6f71d JM |
1245 | #ifdef NEW_PROC_API |
1246 | return pi->prstatus.pr_lwp.pr_cursig; | |
1247 | #else | |
1248 | return pi->prstatus.pr_cursig; | |
1249 | #endif | |
1250 | } | |
d3581e61 | 1251 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
c906108c | 1252 | |
77382aee PA |
1253 | /* === I appologize for the messiness of this function. |
1254 | === This is an area where the different versions of | |
1255 | === /proc are more inconsistent than usual. | |
1256 | ||
1257 | Set or reset any of the following process flags: | |
1258 | PR_FORK -- forked child will inherit trace flags | |
1259 | PR_RLC -- traced process runs when last /proc file closed. | |
1260 | PR_KLC -- traced process is killed when last /proc file closed. | |
1261 | PR_ASYNC -- LWP's get to run/stop independently. | |
1262 | ||
1263 | There are three methods for doing this function: | |
1264 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1265 | [Sol6, Sol7, UW] | |
1266 | 2) Middle: PIOCSET/PIOCRESET | |
1267 | [Irix, Sol5] | |
1268 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1269 | [OSF, Sol5] | |
1270 | ||
1271 | Note: Irix does not define PR_ASYNC. | |
1272 | Note: OSF does not define PR_KLC. | |
1273 | Note: OSF is the only one that can ONLY use the oldest method. | |
1274 | ||
1275 | Arguments: | |
1276 | pi -- the procinfo | |
1277 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1278 | mode -- 1 for set, 0 for reset. | |
1279 | ||
1280 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1281 | |
c3f6f71d | 1282 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1283 | |
c3f6f71d | 1284 | static int |
fba45db2 | 1285 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1286 | { |
1287 | long win = 0; /* default to fail */ | |
1288 | ||
77382aee PA |
1289 | /* These operations affect the process as a whole, and applying them |
1290 | to an individual LWP has the same meaning as applying them to the | |
1291 | main process. Therefore, if we're ever called with a pointer to | |
1292 | an LWP's procinfo, let's substitute the process's procinfo and | |
1293 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1294 | |
1295 | if (pi->pid != 0) | |
1296 | pi = find_procinfo_or_die (pi->pid, 0); | |
1297 | ||
05b4bd79 | 1298 | #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */ |
19958708 | 1299 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1300 | (which for no obvious reason has a different definition |
1301 | from one operating system to the next...) */ | |
1302 | #ifdef PCUNSET | |
1303 | #define GDBRESET PCUNSET | |
37de36c6 | 1304 | #else |
c3f6f71d JM |
1305 | #ifdef PCRESET |
1306 | #define GDBRESET PCRESET | |
37de36c6 | 1307 | #endif |
c906108c | 1308 | #endif |
c3f6f71d | 1309 | { |
37de36c6 | 1310 | procfs_ctl_t arg[2]; |
c906108c | 1311 | |
0df8b418 | 1312 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1313 | arg[0] = PCSET; |
0df8b418 | 1314 | else /* Reset the flag. */ |
c3f6f71d | 1315 | arg[0] = GDBRESET; |
c5aa993b | 1316 | |
c3f6f71d JM |
1317 | arg[1] = flag; |
1318 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1319 | } | |
1320 | #else | |
1321 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1322 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1323 | { |
1324 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1325 | } | |
0df8b418 | 1326 | else /* Reset the flag. */ |
c3f6f71d JM |
1327 | { |
1328 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1329 | } | |
c906108c | 1330 | |
c3f6f71d JM |
1331 | #else |
1332 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1333 | switch (flag) { | |
1334 | case PR_RLC: | |
1335 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1336 | { | |
1337 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1338 | } | |
1339 | else /* Clear run-on-last-close */ | |
1340 | { | |
1341 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1342 | } | |
1343 | break; | |
1344 | case PR_FORK: | |
1345 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1346 | { | |
1347 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1348 | } | |
1349 | else /* Clear inherit-on-fork */ | |
1350 | { | |
1351 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1352 | } | |
1353 | break; | |
1354 | default: | |
0df8b418 | 1355 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1356 | break; |
1357 | } | |
1358 | #endif | |
1359 | #endif | |
1360 | #endif | |
1361 | #undef GDBRESET | |
77382aee PA |
1362 | /* The above operation renders the procinfo's cached pstatus |
1363 | obsolete. */ | |
c3f6f71d | 1364 | pi->status_valid = 0; |
c906108c | 1365 | |
c3f6f71d | 1366 | if (!win) |
8a3fe4f8 | 1367 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1368 | flag == PR_FORK ? "PR_FORK" : |
1369 | flag == PR_RLC ? "PR_RLC" : | |
1370 | #ifdef PR_ASYNC | |
1371 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1372 | #endif |
1373 | #ifdef PR_KLC | |
1374 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1375 | #endif |
1376 | "<unknown flag>", | |
1377 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1378 | |
c3f6f71d JM |
1379 | return win; |
1380 | } | |
c906108c | 1381 | |
77382aee PA |
1382 | /* Set the run_on_last_close flag. Process with all threads will |
1383 | become runnable when debugger closes all /proc fds. Returns | |
1384 | non-zero for success, zero for failure. */ | |
c906108c | 1385 | |
d3581e61 | 1386 | static int |
fba45db2 | 1387 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1388 | { |
c3f6f71d JM |
1389 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1390 | } | |
c906108c | 1391 | |
77382aee PA |
1392 | /* Reset the run_on_last_close flag. The process will NOT become |
1393 | runnable when debugger closes its file handles. Returns non-zero | |
1394 | for success, zero for failure. */ | |
c906108c | 1395 | |
d3581e61 | 1396 | static int |
fba45db2 | 1397 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1398 | { |
1399 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1400 | } |
1401 | ||
77382aee PA |
1402 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1403 | are registered for events in the parent, then we will NOT recieve | |
1404 | events from the child. Returns non-zero for success, zero for | |
1405 | failure. */ | |
c906108c | 1406 | |
d3581e61 | 1407 | static int |
fba45db2 | 1408 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1409 | { |
1410 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1411 | } | |
c906108c | 1412 | |
c3f6f71d | 1413 | #ifdef PR_ASYNC |
77382aee PA |
1414 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1415 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1416 | non-zero for success, zero for failure. */ | |
c906108c | 1417 | |
d3581e61 | 1418 | static int |
fba45db2 | 1419 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1420 | { |
1421 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1422 | } | |
c906108c | 1423 | |
77382aee PA |
1424 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1425 | (signal etc.), then all other LWPs will stop as well. Returns | |
1426 | non-zero for success, zero for failure. */ | |
c906108c | 1427 | |
d3581e61 | 1428 | static int |
fba45db2 | 1429 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1430 | { |
1431 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1432 | } | |
1433 | #endif /* PR_ASYNC */ | |
c906108c | 1434 | |
77382aee PA |
1435 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1436 | for success, zero for failure. */ | |
c906108c | 1437 | |
d3581e61 | 1438 | static int |
fba45db2 | 1439 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1440 | { |
1441 | int win; | |
c906108c | 1442 | |
77382aee PA |
1443 | /* We might conceivably apply this operation to an LWP, and the |
1444 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1445 | |
c3f6f71d JM |
1446 | if (pi->ctl_fd == 0 && |
1447 | open_procinfo_files (pi, FD_CTL) == 0) | |
1448 | return 0; | |
1449 | else | |
1450 | { | |
1451 | #ifdef NEW_PROC_API | |
37de36c6 | 1452 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1453 | |
c3f6f71d JM |
1454 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1455 | #else /* ioctl method */ | |
1456 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1457 | /* Note: the call also reads the prstatus. */ | |
1458 | if (win) | |
1459 | { | |
1460 | pi->status_valid = 1; | |
19958708 | 1461 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1462 | proc_why (pi), |
19958708 | 1463 | proc_what (pi), |
c3f6f71d JM |
1464 | proc_get_current_thread (pi)); |
1465 | } | |
1466 | #endif | |
1467 | } | |
c906108c | 1468 | |
c3f6f71d JM |
1469 | return win; |
1470 | } | |
c5aa993b | 1471 | |
77382aee PA |
1472 | /* Wait for the process or LWP to stop (block until it does). Returns |
1473 | non-zero for success, zero for failure. */ | |
c906108c | 1474 | |
d3581e61 | 1475 | static int |
fba45db2 | 1476 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1477 | { |
c3f6f71d JM |
1478 | int win; |
1479 | ||
77382aee PA |
1480 | /* We should never have to apply this operation to any procinfo |
1481 | except the one for the main process. If that ever changes for | |
1482 | any reason, then take out the following clause and replace it | |
1483 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1484 | |
c3f6f71d JM |
1485 | if (pi->tid != 0) |
1486 | pi = find_procinfo_or_die (pi->pid, 0); | |
1487 | ||
1488 | #ifdef NEW_PROC_API | |
1489 | { | |
37de36c6 | 1490 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1491 | |
c3f6f71d JM |
1492 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1493 | /* We been runnin' and we stopped -- need to update status. */ | |
1494 | pi->status_valid = 0; | |
1495 | } | |
1496 | #else /* ioctl method */ | |
1497 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1498 | /* Above call also refreshes the prstatus. */ | |
1499 | if (win) | |
1500 | { | |
1501 | pi->status_valid = 1; | |
19958708 | 1502 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1503 | proc_why (pi), |
19958708 | 1504 | proc_what (pi), |
c3f6f71d JM |
1505 | proc_get_current_thread (pi)); |
1506 | } | |
c906108c SS |
1507 | #endif |
1508 | ||
c3f6f71d | 1509 | return win; |
c906108c SS |
1510 | } |
1511 | ||
77382aee PA |
1512 | /* Make the process or LWP runnable. |
1513 | ||
1514 | Options (not all are implemented): | |
1515 | - single-step | |
1516 | - clear current fault | |
1517 | - clear current signal | |
1518 | - abort the current system call | |
1519 | - stop as soon as finished with system call | |
1520 | - (ioctl): set traced signal set | |
1521 | - (ioctl): set held signal set | |
1522 | - (ioctl): set traced fault set | |
1523 | - (ioctl): set start pc (vaddr) | |
1524 | ||
1525 | Always clears the current fault. PI is the process or LWP to | |
1526 | operate on. If STEP is true, set the process or LWP to trap after | |
1527 | one instruction. If SIGNO is zero, clear the current signal if | |
1528 | any; if non-zero, set the current signal to this one. Returns | |
1529 | non-zero for success, zero for failure. */ | |
c3f6f71d | 1530 | |
d3581e61 | 1531 | static int |
fba45db2 | 1532 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1533 | { |
1534 | int win; | |
1535 | int runflags; | |
1536 | ||
77382aee PA |
1537 | /* We will probably have to apply this operation to individual |
1538 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1539 | |
c3f6f71d JM |
1540 | if (pi->ctl_fd == 0 && |
1541 | open_procinfo_files (pi, FD_CTL) == 0) | |
1542 | { | |
1543 | return 0; | |
1544 | } | |
c906108c | 1545 | |
0df8b418 | 1546 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1547 | if (step) |
1548 | runflags |= PRSTEP; | |
1549 | if (signo == 0) | |
1550 | runflags |= PRCSIG; | |
0df8b418 | 1551 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1552 | proc_set_current_signal (pi, signo); |
c5aa993b | 1553 | |
c3f6f71d JM |
1554 | #ifdef NEW_PROC_API |
1555 | { | |
37de36c6 | 1556 | procfs_ctl_t cmd[2]; |
c906108c | 1557 | |
c3f6f71d JM |
1558 | cmd[0] = PCRUN; |
1559 | cmd[1] = runflags; | |
1560 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1561 | } | |
1562 | #else /* ioctl method */ | |
1563 | { | |
1564 | prrun_t prrun; | |
c906108c | 1565 | |
c3f6f71d JM |
1566 | memset (&prrun, 0, sizeof (prrun)); |
1567 | prrun.pr_flags = runflags; | |
1568 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1569 | } | |
1570 | #endif | |
c906108c | 1571 | |
c3f6f71d JM |
1572 | return win; |
1573 | } | |
c906108c | 1574 | |
77382aee PA |
1575 | /* Register to trace signals in the process or LWP. Returns non-zero |
1576 | for success, zero for failure. */ | |
c906108c | 1577 | |
d3581e61 | 1578 | static int |
37de36c6 | 1579 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1580 | { |
c3f6f71d JM |
1581 | int win; |
1582 | ||
77382aee PA |
1583 | /* We should never have to apply this operation to any procinfo |
1584 | except the one for the main process. If that ever changes for | |
1585 | any reason, then take out the following clause and replace it | |
1586 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1587 | |
c3f6f71d JM |
1588 | if (pi->tid != 0) |
1589 | pi = find_procinfo_or_die (pi->pid, 0); | |
1590 | ||
1591 | #ifdef NEW_PROC_API | |
1592 | { | |
1593 | struct { | |
37de36c6 | 1594 | procfs_ctl_t cmd; |
c3f6f71d | 1595 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1596 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1597 | } arg; |
c906108c | 1598 | |
c3f6f71d | 1599 | arg.cmd = PCSTRACE; |
37de36c6 | 1600 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1601 | |
c3f6f71d JM |
1602 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1603 | } | |
1604 | #else /* ioctl method */ | |
1605 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1606 | #endif | |
0df8b418 | 1607 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1608 | pi->status_valid = 0; |
c906108c | 1609 | |
c3f6f71d | 1610 | if (!win) |
8a3fe4f8 | 1611 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1612 | return win; |
c906108c SS |
1613 | } |
1614 | ||
77382aee PA |
1615 | /* Register to trace hardware faults in the process or LWP. Returns |
1616 | non-zero for success, zero for failure. */ | |
c906108c | 1617 | |
d3581e61 | 1618 | static int |
fba45db2 | 1619 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1620 | { |
1621 | int win; | |
1622 | ||
77382aee PA |
1623 | /* We should never have to apply this operation to any procinfo |
1624 | except the one for the main process. If that ever changes for | |
1625 | any reason, then take out the following clause and replace it | |
1626 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1627 | |
c3f6f71d JM |
1628 | if (pi->tid != 0) |
1629 | pi = find_procinfo_or_die (pi->pid, 0); | |
1630 | ||
1631 | #ifdef NEW_PROC_API | |
1632 | { | |
1633 | struct { | |
37de36c6 | 1634 | procfs_ctl_t cmd; |
c3f6f71d JM |
1635 | /* Use char array to avoid alignment issues. */ |
1636 | char fltset[sizeof (fltset_t)]; | |
1637 | } arg; | |
c906108c | 1638 | |
c3f6f71d JM |
1639 | arg.cmd = PCSFAULT; |
1640 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1641 | |
c3f6f71d JM |
1642 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1643 | } | |
1644 | #else /* ioctl method */ | |
1645 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1646 | #endif | |
0df8b418 | 1647 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1648 | pi->status_valid = 0; |
c906108c | 1649 | |
c3f6f71d JM |
1650 | return win; |
1651 | } | |
c5aa993b | 1652 | |
77382aee PA |
1653 | /* Register to trace entry to system calls in the process or LWP. |
1654 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1655 | |
d3581e61 | 1656 | static int |
fba45db2 | 1657 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1658 | { |
c3f6f71d JM |
1659 | int win; |
1660 | ||
77382aee PA |
1661 | /* We should never have to apply this operation to any procinfo |
1662 | except the one for the main process. If that ever changes for | |
1663 | any reason, then take out the following clause and replace it | |
1664 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1665 | |
c3f6f71d JM |
1666 | if (pi->tid != 0) |
1667 | pi = find_procinfo_or_die (pi->pid, 0); | |
1668 | ||
1669 | #ifdef NEW_PROC_API | |
1670 | { | |
37de36c6 KB |
1671 | struct gdb_proc_ctl_pcsentry { |
1672 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1673 | /* Use char array to avoid alignment issues. */ |
1674 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1675 | } *argp; |
1676 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1677 | - sizeof (sysset_t) |
37de36c6 | 1678 | + sysset_t_size (pi); |
c3f6f71d | 1679 | |
37de36c6 | 1680 | argp = xmalloc (argp_size); |
c3f6f71d | 1681 | |
37de36c6 KB |
1682 | argp->cmd = PCSENTRY; |
1683 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1684 | ||
1685 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1686 | xfree (argp); | |
c3f6f71d JM |
1687 | } |
1688 | #else /* ioctl method */ | |
1689 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1690 | #endif | |
77382aee PA |
1691 | /* The above operation renders the procinfo's cached pstatus |
1692 | obsolete. */ | |
c3f6f71d | 1693 | pi->status_valid = 0; |
19958708 | 1694 | |
c3f6f71d | 1695 | return win; |
c906108c SS |
1696 | } |
1697 | ||
77382aee PA |
1698 | /* Register to trace exit from system calls in the process or LWP. |
1699 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1700 | |
d3581e61 | 1701 | static int |
fba45db2 | 1702 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1703 | { |
1704 | int win; | |
1705 | ||
77382aee PA |
1706 | /* We should never have to apply this operation to any procinfo |
1707 | except the one for the main process. If that ever changes for | |
1708 | any reason, then take out the following clause and replace it | |
1709 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1710 | |
c3f6f71d JM |
1711 | if (pi->tid != 0) |
1712 | pi = find_procinfo_or_die (pi->pid, 0); | |
1713 | ||
1714 | #ifdef NEW_PROC_API | |
1715 | { | |
37de36c6 KB |
1716 | struct gdb_proc_ctl_pcsexit { |
1717 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1718 | /* Use char array to avoid alignment issues. */ |
1719 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1720 | } *argp; |
1721 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1722 | - sizeof (sysset_t) |
37de36c6 | 1723 | + sysset_t_size (pi); |
c906108c | 1724 | |
37de36c6 | 1725 | argp = xmalloc (argp_size); |
c906108c | 1726 | |
37de36c6 KB |
1727 | argp->cmd = PCSEXIT; |
1728 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1729 | ||
1730 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1731 | xfree (argp); | |
c3f6f71d JM |
1732 | } |
1733 | #else /* ioctl method */ | |
1734 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1735 | #endif | |
77382aee PA |
1736 | /* The above operation renders the procinfo's cached pstatus |
1737 | obsolete. */ | |
c3f6f71d | 1738 | pi->status_valid = 0; |
c906108c | 1739 | |
c3f6f71d JM |
1740 | return win; |
1741 | } | |
c906108c | 1742 | |
77382aee PA |
1743 | /* Specify the set of blocked / held signals in the process or LWP. |
1744 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1745 | |
d3581e61 | 1746 | static int |
37de36c6 | 1747 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1748 | { |
c3f6f71d JM |
1749 | int win; |
1750 | ||
77382aee PA |
1751 | /* We should never have to apply this operation to any procinfo |
1752 | except the one for the main process. If that ever changes for | |
1753 | any reason, then take out the following clause and replace it | |
1754 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1755 | |
c3f6f71d JM |
1756 | if (pi->tid != 0) |
1757 | pi = find_procinfo_or_die (pi->pid, 0); | |
1758 | ||
1759 | #ifdef NEW_PROC_API | |
1760 | { | |
1761 | struct { | |
37de36c6 | 1762 | procfs_ctl_t cmd; |
c3f6f71d | 1763 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1764 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1765 | } arg; |
1766 | ||
1767 | arg.cmd = PCSHOLD; | |
37de36c6 | 1768 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1769 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1770 | } | |
c906108c | 1771 | #else |
c3f6f71d | 1772 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1773 | #endif |
77382aee PA |
1774 | /* The above operation renders the procinfo's cached pstatus |
1775 | obsolete. */ | |
c3f6f71d JM |
1776 | pi->status_valid = 0; |
1777 | ||
1778 | return win; | |
c906108c SS |
1779 | } |
1780 | ||
77382aee PA |
1781 | /* Returns the set of signals that are held / blocked. Will also copy |
1782 | the sigset if SAVE is non-zero. */ | |
c906108c | 1783 | |
d3581e61 | 1784 | static gdb_sigset_t * |
37de36c6 | 1785 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1786 | { |
37de36c6 | 1787 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1788 | |
77382aee PA |
1789 | /* We should never have to apply this operation to any procinfo |
1790 | except the one for the main process. If that ever changes for | |
1791 | any reason, then take out the following clause and replace it | |
1792 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1793 | |
c3f6f71d JM |
1794 | if (pi->tid != 0) |
1795 | pi = find_procinfo_or_die (pi->pid, 0); | |
1796 | ||
1797 | #ifdef NEW_PROC_API | |
1798 | if (!pi->status_valid) | |
1799 | if (!proc_get_status (pi)) | |
1800 | return NULL; | |
1801 | ||
c3f6f71d | 1802 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d JM |
1803 | #else /* not NEW_PROC_API */ |
1804 | { | |
37de36c6 | 1805 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1806 | |
1807 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1808 | ret = &sigheld; | |
1809 | } | |
1810 | #endif /* NEW_PROC_API */ | |
1811 | if (save && ret) | |
37de36c6 | 1812 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1813 | |
1814 | return ret; | |
c906108c SS |
1815 | } |
1816 | ||
77382aee PA |
1817 | /* Returns the set of signals that are traced / debugged. Will also |
1818 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1819 | |
d3581e61 | 1820 | static gdb_sigset_t * |
37de36c6 | 1821 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1822 | { |
37de36c6 | 1823 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1824 | |
77382aee PA |
1825 | /* We should never have to apply this operation to any procinfo |
1826 | except the one for the main process. If that ever changes for | |
1827 | any reason, then take out the following clause and replace it | |
1828 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1829 | |
c3f6f71d JM |
1830 | if (pi->tid != 0) |
1831 | pi = find_procinfo_or_die (pi->pid, 0); | |
1832 | ||
1833 | #ifdef NEW_PROC_API | |
1834 | if (!pi->status_valid) | |
1835 | if (!proc_get_status (pi)) | |
1836 | return NULL; | |
1837 | ||
1838 | ret = &pi->prstatus.pr_sigtrace; | |
1839 | #else | |
1840 | { | |
37de36c6 | 1841 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
1842 | |
1843 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1844 | ret = &sigtrace; | |
1845 | } | |
c906108c | 1846 | #endif |
c3f6f71d | 1847 | if (save && ret) |
37de36c6 | 1848 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1849 | |
c3f6f71d JM |
1850 | return ret; |
1851 | } | |
c906108c | 1852 | |
77382aee PA |
1853 | /* Returns the set of hardware faults that are traced /debugged. Will |
1854 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1855 | |
d3581e61 | 1856 | static fltset_t * |
fba45db2 | 1857 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1858 | { |
1859 | fltset_t *ret = NULL; | |
1860 | ||
77382aee PA |
1861 | /* We should never have to apply this operation to any procinfo |
1862 | except the one for the main process. If that ever changes for | |
1863 | any reason, then take out the following clause and replace it | |
1864 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1865 | |
c3f6f71d JM |
1866 | if (pi->tid != 0) |
1867 | pi = find_procinfo_or_die (pi->pid, 0); | |
1868 | ||
1869 | #ifdef NEW_PROC_API | |
1870 | if (!pi->status_valid) | |
1871 | if (!proc_get_status (pi)) | |
1872 | return NULL; | |
1873 | ||
1874 | ret = &pi->prstatus.pr_flttrace; | |
1875 | #else | |
1876 | { | |
1877 | static fltset_t flttrace; | |
1878 | ||
1879 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1880 | ret = &flttrace; | |
1881 | } | |
1882 | #endif | |
1883 | if (save && ret) | |
1884 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1885 | |
c3f6f71d JM |
1886 | return ret; |
1887 | } | |
c906108c | 1888 | |
77382aee PA |
1889 | /* Returns the set of syscalls that are traced /debugged on entry. |
1890 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1891 | |
d3581e61 | 1892 | static sysset_t * |
fba45db2 | 1893 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1894 | { |
1895 | sysset_t *ret = NULL; | |
1896 | ||
77382aee PA |
1897 | /* We should never have to apply this operation to any procinfo |
1898 | except the one for the main process. If that ever changes for | |
1899 | any reason, then take out the following clause and replace it | |
1900 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1901 | |
c3f6f71d JM |
1902 | if (pi->tid != 0) |
1903 | pi = find_procinfo_or_die (pi->pid, 0); | |
1904 | ||
1905 | #ifdef NEW_PROC_API | |
1906 | if (!pi->status_valid) | |
1907 | if (!proc_get_status (pi)) | |
1908 | return NULL; | |
1909 | ||
37de36c6 | 1910 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1911 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
1912 | #else /* DYNAMIC_SYSCALLS */ |
1913 | { | |
1914 | static sysset_t *sysentry; | |
1915 | size_t size; | |
1916 | ||
1917 | if (!sysentry) | |
1918 | sysentry = sysset_t_alloc (pi); | |
1919 | ret = sysentry; | |
1920 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1921 | return NULL; | |
1922 | if (pi->prstatus.pr_sysentry_offset == 0) | |
1923 | { | |
1924 | gdb_premptysysset (sysentry); | |
1925 | } | |
1926 | else | |
1927 | { | |
1928 | int rsize; | |
1929 | ||
1930 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 1931 | SEEK_SET) |
37de36c6 KB |
1932 | != (off_t) pi->prstatus.pr_sysentry_offset) |
1933 | return NULL; | |
1934 | size = sysset_t_size (pi); | |
1935 | gdb_premptysysset (sysentry); | |
1936 | rsize = read (pi->status_fd, sysentry, size); | |
1937 | if (rsize < 0) | |
1938 | return NULL; | |
1939 | } | |
1940 | } | |
1941 | #endif /* DYNAMIC_SYSCALLS */ | |
1942 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
1943 | { |
1944 | static sysset_t sysentry; | |
c906108c | 1945 | |
c3f6f71d JM |
1946 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1947 | ret = &sysentry; | |
1948 | } | |
37de36c6 | 1949 | #endif /* NEW_PROC_API */ |
c3f6f71d | 1950 | if (save && ret) |
37de36c6 | 1951 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 1952 | |
c3f6f71d JM |
1953 | return ret; |
1954 | } | |
c5aa993b | 1955 | |
77382aee PA |
1956 | /* Returns the set of syscalls that are traced /debugged on exit. |
1957 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1958 | |
d3581e61 | 1959 | static sysset_t * |
fba45db2 | 1960 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1961 | { |
c3f6f71d JM |
1962 | sysset_t * ret = NULL; |
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 | ||
37de36c6 | 1977 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1978 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
1979 | #else /* DYNAMIC_SYSCALLS */ |
1980 | { | |
1981 | static sysset_t *sysexit; | |
1982 | size_t size; | |
1983 | ||
1984 | if (!sysexit) | |
1985 | sysexit = sysset_t_alloc (pi); | |
1986 | ret = sysexit; | |
1987 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1988 | return NULL; | |
1989 | if (pi->prstatus.pr_sysexit_offset == 0) | |
1990 | { | |
1991 | gdb_premptysysset (sysexit); | |
1992 | } | |
1993 | else | |
1994 | { | |
1995 | int rsize; | |
1996 | ||
77382aee PA |
1997 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
1998 | SEEK_SET) | |
37de36c6 KB |
1999 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2000 | return NULL; | |
2001 | size = sysset_t_size (pi); | |
2002 | gdb_premptysysset (sysexit); | |
2003 | rsize = read (pi->status_fd, sysexit, size); | |
2004 | if (rsize < 0) | |
2005 | return NULL; | |
2006 | } | |
2007 | } | |
2008 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2009 | #else |
2010 | { | |
2011 | static sysset_t sysexit; | |
c5aa993b | 2012 | |
c3f6f71d JM |
2013 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2014 | ret = &sysexit; | |
2015 | } | |
2016 | #endif | |
2017 | if (save && ret) | |
37de36c6 | 2018 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2019 | |
2020 | return ret; | |
2021 | } | |
c906108c | 2022 | |
77382aee PA |
2023 | /* The current fault (if any) is cleared; the associated signal will |
2024 | not be sent to the process or LWP when it resumes. Returns | |
2025 | non-zero for success, zero for failure. */ | |
c906108c | 2026 | |
d3581e61 | 2027 | static int |
fba45db2 | 2028 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2029 | { |
2030 | int win; | |
2031 | ||
77382aee PA |
2032 | /* We should never have to apply this operation to any procinfo |
2033 | except the one for the main process. If that ever changes for | |
2034 | any reason, then take out the following clause and replace it | |
2035 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2036 | |
c3f6f71d JM |
2037 | if (pi->tid != 0) |
2038 | pi = find_procinfo_or_die (pi->pid, 0); | |
2039 | ||
2040 | #ifdef NEW_PROC_API | |
2041 | { | |
37de36c6 | 2042 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2043 | |
c3f6f71d JM |
2044 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2045 | } | |
2046 | #else | |
2047 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2048 | #endif | |
2049 | ||
2050 | return win; | |
c906108c SS |
2051 | } |
2052 | ||
77382aee PA |
2053 | /* Set the "current signal" that will be delivered next to the |
2054 | process. NOTE: semantics are different from those of KILL. This | |
2055 | signal will be delivered to the process or LWP immediately when it | |
2056 | is resumed (even if the signal is held/blocked); it will NOT | |
2057 | immediately cause another event of interest, and will NOT first | |
2058 | trap back to the debugger. Returns non-zero for success, zero for | |
2059 | failure. */ | |
c3f6f71d | 2060 | |
d3581e61 | 2061 | static int |
fba45db2 | 2062 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2063 | { |
2064 | int win; | |
2065 | struct { | |
37de36c6 | 2066 | procfs_ctl_t cmd; |
c3f6f71d | 2067 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2068 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2069 | } arg; |
73930d4d | 2070 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2071 | ptid_t wait_ptid; |
2072 | struct target_waitstatus wait_status; | |
c3f6f71d | 2073 | |
77382aee PA |
2074 | /* We should never have to apply this operation to any procinfo |
2075 | except the one for the main process. If that ever changes for | |
2076 | any reason, then take out the following clause and replace it | |
2077 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2078 | |
c3f6f71d JM |
2079 | if (pi->tid != 0) |
2080 | pi = find_procinfo_or_die (pi->pid, 0); | |
2081 | ||
2082 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2083 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2084 | receives a PIOCSSIG with a signal identical to the current |
2085 | signal, it messes up the current signal. Work around the kernel | |
2086 | bug. */ | |
c3f6f71d JM |
2087 | if (signo > 0 && |
2088 | signo == proc_cursig (pi)) | |
0df8b418 | 2089 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2090 | #endif |
2091 | ||
2092 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2093 | get_last_target_status (&wait_ptid, &wait_status); |
2094 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2095 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 2096 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 JM |
2097 | && proc_get_status (pi) |
2098 | #ifdef NEW_PROC_API | |
2099 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2100 | #else | |
2101 | && pi->prstatus.pr_info.si_signo == signo | |
2102 | #endif | |
2103 | ) | |
2104 | /* Use the siginfo associated with the signal being | |
2105 | redelivered. */ | |
2106 | #ifdef NEW_PROC_API | |
73930d4d | 2107 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2108 | #else |
73930d4d | 2109 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2110 | #endif |
2111 | else | |
2112 | { | |
73930d4d KH |
2113 | mysinfo.si_signo = signo; |
2114 | mysinfo.si_code = 0; | |
2115 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2116 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2117 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2118 | } |
c3f6f71d JM |
2119 | |
2120 | #ifdef NEW_PROC_API | |
2121 | arg.cmd = PCSSIG; | |
2122 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2123 | #else | |
2124 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2125 | #endif | |
c906108c | 2126 | |
c3f6f71d JM |
2127 | return win; |
2128 | } | |
c906108c | 2129 | |
77382aee PA |
2130 | /* The current signal (if any) is cleared, and is not sent to the |
2131 | process or LWP when it resumes. Returns non-zero for success, zero | |
2132 | for failure. */ | |
c906108c | 2133 | |
d3581e61 | 2134 | static int |
fba45db2 | 2135 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2136 | { |
2137 | int win; | |
2138 | ||
77382aee PA |
2139 | /* We should never have to apply this operation to any procinfo |
2140 | except the one for the main process. If that ever changes for | |
2141 | any reason, then take out the following clause and replace it | |
2142 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2143 | |
c3f6f71d JM |
2144 | if (pi->tid != 0) |
2145 | pi = find_procinfo_or_die (pi->pid, 0); | |
2146 | ||
2147 | #ifdef NEW_PROC_API | |
2148 | { | |
2149 | struct { | |
37de36c6 | 2150 | procfs_ctl_t cmd; |
c3f6f71d | 2151 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2152 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2153 | } arg; |
73930d4d | 2154 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2155 | |
2156 | arg.cmd = PCSSIG; | |
2157 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2158 | mysinfo.si_signo = 0; |
2159 | mysinfo.si_code = 0; | |
2160 | mysinfo.si_errno = 0; | |
2161 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2162 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2163 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2164 | |
2165 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2166 | } | |
2167 | #else | |
2168 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2169 | #endif | |
c906108c | 2170 | |
c3f6f71d JM |
2171 | return win; |
2172 | } | |
c906108c | 2173 | |
772cf8be MK |
2174 | /* Return the general-purpose registers for the process or LWP |
2175 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2176 | |
d3581e61 | 2177 | static gdb_gregset_t * |
fba45db2 | 2178 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2179 | { |
2180 | if (!pi->status_valid || !pi->gregs_valid) | |
2181 | if (!proc_get_status (pi)) | |
2182 | return NULL; | |
2183 | ||
c3f6f71d | 2184 | #ifdef NEW_PROC_API |
c3f6f71d | 2185 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be | 2186 | #else |
c3f6f71d | 2187 | return &pi->prstatus.pr_reg; |
772cf8be | 2188 | #endif |
c3f6f71d | 2189 | } |
c5aa993b | 2190 | |
772cf8be MK |
2191 | /* Return the general-purpose registers for the process or LWP |
2192 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2193 | |
d3581e61 | 2194 | static gdb_fpregset_t * |
fba45db2 | 2195 | proc_get_fpregs (procinfo *pi) |
c906108c | 2196 | { |
c3f6f71d JM |
2197 | #ifdef NEW_PROC_API |
2198 | if (!pi->status_valid || !pi->fpregs_valid) | |
2199 | if (!proc_get_status (pi)) | |
2200 | return NULL; | |
2201 | ||
c3f6f71d | 2202 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c5aa993b | 2203 | |
772cf8be | 2204 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2205 | if (pi->fpregs_valid) |
772cf8be | 2206 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2207 | else |
c906108c | 2208 | { |
772cf8be | 2209 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2210 | { |
c3f6f71d | 2211 | return NULL; |
c906108c | 2212 | } |
c3f6f71d | 2213 | else |
c906108c | 2214 | { |
772cf8be | 2215 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2216 | struct { |
2217 | long pr_count; | |
2218 | tid_t pr_error_thread; | |
2219 | tfpregset_t thread_1; | |
2220 | } thread_fpregs; | |
2221 | ||
2222 | thread_fpregs.pr_count = 1; | |
2223 | thread_fpregs.thread_1.tid = pi->tid; | |
2224 | ||
772cf8be MK |
2225 | if (pi->tid == 0 |
2226 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2227 | { |
2228 | pi->fpregs_valid = 1; | |
772cf8be | 2229 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2230 | } |
772cf8be MK |
2231 | else if (pi->tid != 0 |
2232 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2233 | { |
2234 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2235 | sizeof (pi->fpregset)); | |
2236 | pi->fpregs_valid = 1; | |
772cf8be | 2237 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2238 | } |
2239 | else | |
2240 | { | |
2241 | return NULL; | |
2242 | } | |
772cf8be | 2243 | # else |
c3f6f71d JM |
2244 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2245 | { | |
2246 | pi->fpregs_valid = 1; | |
772cf8be | 2247 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2248 | } |
2249 | else | |
2250 | { | |
2251 | return NULL; | |
2252 | } | |
772cf8be | 2253 | # endif |
c906108c | 2254 | } |
c906108c | 2255 | } |
772cf8be | 2256 | #endif /* NEW_PROC_API */ |
c906108c SS |
2257 | } |
2258 | ||
772cf8be MK |
2259 | /* Write the general-purpose registers back to the process or LWP |
2260 | corresponding to PI. Return non-zero for success, zero for | |
2261 | failure. */ | |
c3f6f71d | 2262 | |
d3581e61 | 2263 | static int |
fba45db2 | 2264 | proc_set_gregs (procinfo *pi) |
c906108c | 2265 | { |
c3f6f71d JM |
2266 | gdb_gregset_t *gregs; |
2267 | int win; | |
c5aa993b | 2268 | |
772cf8be MK |
2269 | gregs = proc_get_gregs (pi); |
2270 | if (gregs == NULL) | |
2271 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2272 | |
772cf8be | 2273 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2274 | { |
c3f6f71d | 2275 | return 0; |
c906108c | 2276 | } |
c3f6f71d | 2277 | else |
c906108c | 2278 | { |
c3f6f71d JM |
2279 | #ifdef NEW_PROC_API |
2280 | struct { | |
37de36c6 | 2281 | procfs_ctl_t cmd; |
c3f6f71d JM |
2282 | /* Use char array to avoid alignment issues. */ |
2283 | char gregs[sizeof (gdb_gregset_t)]; | |
2284 | } arg; | |
2285 | ||
772cf8be | 2286 | arg.cmd = PCSREG; |
c3f6f71d JM |
2287 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2288 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2289 | #else | |
2290 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2291 | #endif | |
c906108c | 2292 | } |
c3f6f71d | 2293 | |
772cf8be | 2294 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2295 | pi->gregs_valid = 0; |
2296 | return win; | |
c906108c SS |
2297 | } |
2298 | ||
772cf8be MK |
2299 | /* Write the floating-pointer registers back to the process or LWP |
2300 | corresponding to PI. Return non-zero for success, zero for | |
2301 | failure. */ | |
c3f6f71d | 2302 | |
d3581e61 | 2303 | static int |
fba45db2 | 2304 | proc_set_fpregs (procinfo *pi) |
c906108c | 2305 | { |
c3f6f71d JM |
2306 | gdb_fpregset_t *fpregs; |
2307 | int win; | |
2308 | ||
772cf8be MK |
2309 | fpregs = proc_get_fpregs (pi); |
2310 | if (fpregs == NULL) | |
2311 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2312 | |
772cf8be | 2313 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2314 | { |
c3f6f71d | 2315 | return 0; |
c906108c | 2316 | } |
c3f6f71d | 2317 | else |
c906108c | 2318 | { |
c3f6f71d JM |
2319 | #ifdef NEW_PROC_API |
2320 | struct { | |
37de36c6 | 2321 | procfs_ctl_t cmd; |
c3f6f71d JM |
2322 | /* Use char array to avoid alignment issues. */ |
2323 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2324 | } arg; | |
2325 | ||
772cf8be | 2326 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2327 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2328 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2329 | #else | |
772cf8be | 2330 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2331 | if (pi->tid == 0) |
2332 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2333 | else | |
2334 | { | |
2335 | struct { | |
2336 | long pr_count; | |
2337 | tid_t pr_error_thread; | |
2338 | tfpregset_t thread_1; | |
2339 | } thread_fpregs; | |
2340 | ||
2341 | thread_fpregs.pr_count = 1; | |
2342 | thread_fpregs.thread_1.tid = pi->tid; | |
2343 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2344 | sizeof (*fpregs)); | |
2345 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2346 | } | |
772cf8be | 2347 | # else |
c3f6f71d | 2348 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2349 | # endif |
2350 | #endif /* NEW_PROC_API */ | |
c906108c | 2351 | } |
c3f6f71d | 2352 | |
772cf8be | 2353 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2354 | pi->fpregs_valid = 0; |
2355 | return win; | |
c906108c SS |
2356 | } |
2357 | ||
77382aee PA |
2358 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2359 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2360 | |
d3581e61 | 2361 | static int |
fba45db2 | 2362 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2363 | { |
2364 | int win; | |
c906108c | 2365 | |
77382aee PA |
2366 | /* We might conceivably apply this operation to an LWP, and the |
2367 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2368 | |
c3f6f71d JM |
2369 | if (pi->ctl_fd == 0 && |
2370 | open_procinfo_files (pi, FD_CTL) == 0) | |
2371 | { | |
2372 | return 0; | |
2373 | } | |
2374 | else | |
2375 | { | |
2376 | #ifdef NEW_PROC_API | |
37de36c6 | 2377 | procfs_ctl_t cmd[2]; |
c906108c | 2378 | |
c3f6f71d JM |
2379 | cmd[0] = PCKILL; |
2380 | cmd[1] = signo; | |
2381 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2382 | #else /* ioctl method */ | |
2383 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2384 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2385 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2386 | #endif | |
2387 | } | |
c906108c | 2388 | |
c3f6f71d JM |
2389 | return win; |
2390 | } | |
c906108c | 2391 | |
77382aee PA |
2392 | /* Find the pid of the process that started this one. Returns the |
2393 | parent process pid, or zero. */ | |
c906108c | 2394 | |
d3581e61 | 2395 | static int |
fba45db2 | 2396 | proc_parent_pid (procinfo *pi) |
c906108c | 2397 | { |
77382aee PA |
2398 | /* We should never have to apply this operation to any procinfo |
2399 | except the one for the main process. If that ever changes for | |
2400 | any reason, then take out the following clause and replace it | |
2401 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2402 | |
c3f6f71d JM |
2403 | if (pi->tid != 0) |
2404 | pi = find_procinfo_or_die (pi->pid, 0); | |
2405 | ||
2406 | if (!pi->status_valid) | |
2407 | if (!proc_get_status (pi)) | |
2408 | return 0; | |
c5aa993b | 2409 | |
c3f6f71d JM |
2410 | return pi->prstatus.pr_ppid; |
2411 | } | |
2412 | ||
9a043c1d AC |
2413 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2414 | (a.k.a void pointer)! */ | |
2415 | ||
1ca8fce0 | 2416 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
05b4bd79 | 2417 | && !(defined (PIOCOPENLWP)) |
9a043c1d AC |
2418 | static void * |
2419 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2420 | { | |
f5656ead | 2421 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
2422 | void *ptr; |
2423 | ||
4e906f53 | 2424 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 2425 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 2426 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
2427 | return ptr; |
2428 | } | |
1ca8fce0 | 2429 | #endif |
9a043c1d | 2430 | |
a0911fd0 | 2431 | static int |
fba45db2 | 2432 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2433 | { |
d1a7880c PA |
2434 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2435 | /* If neither or these is defined, we can't support watchpoints. | |
2436 | This just avoids possibly failing to compile the below on such | |
2437 | systems. */ | |
c3f6f71d JM |
2438 | return 0; |
2439 | #else | |
0df8b418 | 2440 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
05b4bd79 | 2441 | #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */ |
c3f6f71d JM |
2442 | return 0; |
2443 | #else | |
2444 | struct { | |
37de36c6 | 2445 | procfs_ctl_t cmd; |
c3f6f71d JM |
2446 | char watch[sizeof (prwatch_t)]; |
2447 | } arg; | |
73930d4d | 2448 | prwatch_t pwatch; |
c3f6f71d | 2449 | |
9a043c1d AC |
2450 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2451 | convert a target address into something that can be stored in a | |
2452 | native data structure. */ | |
831e682e | 2453 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2454 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2455 | #else |
73930d4d | 2456 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2457 | #endif |
73930d4d KH |
2458 | pwatch.pr_size = len; |
2459 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2460 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2461 | arg.cmd = PCWATCH; | |
73930d4d | 2462 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2463 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2464 | #else | |
2465 | #if defined (PIOCSWATCH) | |
73930d4d | 2466 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2467 | #else |
2468 | return 0; /* Fail */ | |
2469 | #endif | |
2470 | #endif | |
2471 | #endif | |
2472 | #endif | |
c906108c SS |
2473 | } |
2474 | ||
965b60ee | 2475 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2476 | |
c3f6f71d | 2477 | #include <sys/sysi86.h> |
c906108c | 2478 | |
77382aee PA |
2479 | /* The KEY is actually the value of the lower 16 bits of the GS |
2480 | register for the LWP that we're interested in. Returns the | |
2481 | matching ssh struct (LDT entry). */ | |
c906108c | 2482 | |
337c776f | 2483 | static struct ssd * |
fba45db2 | 2484 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2485 | { |
c3f6f71d JM |
2486 | static struct ssd *ldt_entry = NULL; |
2487 | #ifdef NEW_PROC_API | |
2488 | char pathname[MAX_PROC_NAME_SIZE]; | |
2489 | struct cleanup *old_chain = NULL; | |
2490 | int fd; | |
2491 | ||
2492 | /* Allocate space for one LDT entry. | |
2493 | This alloc must persist, because we return a pointer to it. */ | |
2494 | if (ldt_entry == NULL) | |
2495 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2496 | ||
2497 | /* Open the file descriptor for the LDT table. */ | |
2498 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2499 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2500 | { |
c3f6f71d JM |
2501 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2502 | return NULL; | |
c906108c | 2503 | } |
0df8b418 | 2504 | /* Make sure it gets closed again! */ |
004527cb | 2505 | old_chain = make_cleanup_close (fd); |
c906108c | 2506 | |
c3f6f71d JM |
2507 | /* Now 'read' thru the table, find a match and return it. */ |
2508 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2509 | { |
c3f6f71d JM |
2510 | if (ldt_entry->sel == 0 && |
2511 | ldt_entry->bo == 0 && | |
2512 | ldt_entry->acc1 == 0 && | |
2513 | ldt_entry->acc2 == 0) | |
2514 | break; /* end of table */ | |
0df8b418 | 2515 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2516 | if (ldt_entry->sel == key) |
2517 | return ldt_entry; | |
c906108c | 2518 | } |
0df8b418 | 2519 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2520 | return NULL; |
2521 | #else | |
2522 | int nldt, i; | |
2523 | static int nalloc = 0; | |
c906108c | 2524 | |
c3f6f71d JM |
2525 | /* Get the number of LDT entries. */ |
2526 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2527 | { |
c3f6f71d JM |
2528 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2529 | return NULL; | |
c906108c SS |
2530 | } |
2531 | ||
0df8b418 MS |
2532 | /* Allocate space for the number of LDT entries. */ |
2533 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2534 | if (nldt > nalloc) |
c906108c | 2535 | { |
19958708 | 2536 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2537 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2538 | nalloc = nldt; | |
2539 | } | |
19958708 | 2540 | |
c3f6f71d JM |
2541 | /* Read the whole table in one gulp. */ |
2542 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2543 | { | |
2544 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2545 | return NULL; | |
c906108c SS |
2546 | } |
2547 | ||
0df8b418 | 2548 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2549 | for (i = 0; i < nldt; i++) |
2550 | if (ldt_entry[i].sel == key) | |
2551 | return &ldt_entry[i]; | |
c906108c | 2552 | |
0df8b418 | 2553 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2554 | return NULL; |
2555 | #endif | |
2556 | } | |
c906108c | 2557 | |
77382aee | 2558 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2559 | |
2560 | struct ssd * | |
2561 | procfs_find_LDT_entry (ptid_t ptid) | |
2562 | { | |
2563 | gdb_gregset_t *gregs; | |
2564 | int key; | |
2565 | procinfo *pi; | |
2566 | ||
0df8b418 | 2567 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 2568 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 2569 | { |
0b62613e | 2570 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 2571 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2572 | return NULL; |
2573 | } | |
0df8b418 | 2574 | /* get its general registers. */ |
965b60ee JB |
2575 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2576 | { | |
0b62613e | 2577 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 2578 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2579 | return NULL; |
2580 | } | |
0df8b418 | 2581 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2582 | key = (*gregs)[GS] & 0xffff; |
2583 | ||
0df8b418 | 2584 | /* Find the matching entry and return it. */ |
965b60ee JB |
2585 | return proc_get_LDT_entry (pi, key); |
2586 | } | |
2587 | ||
2588 | #endif | |
c906108c | 2589 | |
c3f6f71d | 2590 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2591 | |
c3f6f71d | 2592 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2593 | |
c3f6f71d JM |
2594 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2595 | since there is a different way to do threads on every OS. */ | |
c906108c | 2596 | |
77382aee | 2597 | /* Returns the number of threads for the process. */ |
c906108c | 2598 | |
c3f6f71d | 2599 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2600 | /* OSF version */ |
d3581e61 | 2601 | static int |
fba45db2 | 2602 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2603 | { |
2604 | int nthreads = 0; | |
c906108c | 2605 | |
c3f6f71d JM |
2606 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2607 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2608 | |
c3f6f71d | 2609 | return nthreads; |
c906108c SS |
2610 | } |
2611 | ||
c3f6f71d JM |
2612 | #else |
2613 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2614 | /* Solaris version */ |
d3581e61 | 2615 | static int |
fba45db2 | 2616 | proc_get_nthreads (procinfo *pi) |
c906108c | 2617 | { |
c3f6f71d JM |
2618 | if (!pi->status_valid) |
2619 | if (!proc_get_status (pi)) | |
2620 | return 0; | |
c5aa993b | 2621 | |
77382aee PA |
2622 | /* NEW_PROC_API: only works for the process procinfo, because the |
2623 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2624 | #ifdef NEW_PROC_API |
0df8b418 | 2625 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2626 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2627 | #endif |
c3f6f71d | 2628 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2629 | } |
2630 | ||
c3f6f71d | 2631 | #else |
77382aee | 2632 | /* Default version */ |
d3581e61 | 2633 | static int |
fba45db2 | 2634 | proc_get_nthreads (procinfo *pi) |
c906108c | 2635 | { |
c3f6f71d JM |
2636 | return 0; |
2637 | } | |
2638 | #endif | |
2639 | #endif | |
2640 | ||
77382aee PA |
2641 | /* LWP version. |
2642 | ||
2643 | Return the ID of the thread that had an event of interest. | |
2644 | (ie. the one that hit a breakpoint or other traced event). All | |
2645 | other things being equal, this should be the ID of a thread that is | |
2646 | currently executing. */ | |
c3f6f71d JM |
2647 | |
2648 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2649 | /* Solaris version */ |
d3581e61 | 2650 | static int |
fba45db2 | 2651 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2652 | { |
77382aee PA |
2653 | /* Note: this should be applied to the root procinfo for the |
2654 | process, not to the procinfo for an LWP. If applied to the | |
2655 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2656 | that case, find the parent process procinfo. */ | |
19958708 | 2657 | |
c3f6f71d JM |
2658 | if (pi->tid != 0) |
2659 | pi = find_procinfo_or_die (pi->pid, 0); | |
2660 | ||
2661 | if (!pi->status_valid) | |
2662 | if (!proc_get_status (pi)) | |
2663 | return 0; | |
2664 | ||
2665 | #ifdef NEW_PROC_API | |
2666 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2667 | #else |
c3f6f71d | 2668 | return pi->prstatus.pr_who; |
c906108c | 2669 | #endif |
c3f6f71d | 2670 | } |
c906108c | 2671 | |
c3f6f71d JM |
2672 | #else |
2673 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2674 | /* OSF version */ |
d3581e61 | 2675 | static int |
fba45db2 | 2676 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2677 | { |
0df8b418 | 2678 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2679 | return pi->prstatus.pr_tid; |
2680 | #else | |
2681 | return 0; | |
2682 | #endif | |
c906108c SS |
2683 | } |
2684 | ||
c3f6f71d | 2685 | #else |
77382aee | 2686 | /* Default version */ |
d3581e61 | 2687 | static int |
fba45db2 | 2688 | proc_get_current_thread (procinfo *pi) |
c906108c | 2689 | { |
c3f6f71d JM |
2690 | return 0; |
2691 | } | |
2692 | ||
2693 | #endif | |
2694 | #endif | |
c906108c | 2695 | |
77382aee PA |
2696 | /* Discover the IDs of all the threads within the process, and create |
2697 | a procinfo for each of them (chained to the parent). This | |
2698 | unfortunately requires a different method on every OS. Returns | |
2699 | non-zero for success, zero for failure. */ | |
c906108c | 2700 | |
a0911fd0 | 2701 | static int |
fba45db2 | 2702 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2703 | { |
2704 | if (thread && parent) /* sanity */ | |
c906108c | 2705 | { |
c3f6f71d JM |
2706 | thread->status_valid = 0; |
2707 | if (!proc_get_status (thread)) | |
2708 | destroy_one_procinfo (&parent->thread_list, thread); | |
2709 | } | |
2710 | return 0; /* keep iterating */ | |
2711 | } | |
c5aa993b | 2712 | |
c3f6f71d | 2713 | #if defined (PIOCLSTATUS) |
77382aee | 2714 | /* Solaris 2.5 (ioctl) version */ |
d3581e61 | 2715 | static int |
fba45db2 | 2716 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2717 | { |
2718 | gdb_prstatus_t *prstatus; | |
2719 | struct cleanup *old_chain = NULL; | |
2720 | procinfo *thread; | |
2721 | int nlwp, i; | |
2722 | ||
77382aee PA |
2723 | /* We should never have to apply this operation to any procinfo |
2724 | except the one for the main process. If that ever changes for | |
2725 | any reason, then take out the following clause and replace it | |
2726 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2727 | |
c3f6f71d JM |
2728 | if (pi->tid != 0) |
2729 | pi = find_procinfo_or_die (pi->pid, 0); | |
2730 | ||
2731 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2732 | ||
2733 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2734 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2735 | ||
3c37485b | 2736 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2737 | |
b8c9b27d | 2738 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2739 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2740 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2741 | ||
77382aee | 2742 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2743 | for (i = 1; i < nlwp + 1; i++) |
2744 | { | |
2745 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2746 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2747 | |
c3f6f71d JM |
2748 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2749 | thread->status_valid = 1; | |
2750 | } | |
2751 | pi->threads_valid = 1; | |
2752 | do_cleanups (old_chain); | |
2753 | return 1; | |
2754 | } | |
2755 | #else | |
2756 | #ifdef NEW_PROC_API | |
05b4bd79 | 2757 | /* Solaris 6 (and later) version. */ |
004527cb AC |
2758 | static void |
2759 | do_closedir_cleanup (void *dir) | |
2760 | { | |
2761 | closedir (dir); | |
2762 | } | |
2763 | ||
d3581e61 | 2764 | static int |
fba45db2 | 2765 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2766 | { |
2767 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2768 | struct dirent *direntry; | |
2769 | struct cleanup *old_chain = NULL; | |
2770 | procinfo *thread; | |
2771 | DIR *dirp; | |
2772 | int lwpid; | |
2773 | ||
77382aee PA |
2774 | /* We should never have to apply this operation to any procinfo |
2775 | except the one for the main process. If that ever changes for | |
2776 | any reason, then take out the following clause and replace it | |
2777 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2778 | |
c3f6f71d JM |
2779 | if (pi->tid != 0) |
2780 | pi = find_procinfo_or_die (pi->pid, 0); | |
2781 | ||
2782 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2783 | ||
05b4bd79 PA |
2784 | /* Note: this brute-force method was originally devised for Unixware |
2785 | (support removed since), and will also work on Solaris 2.6 and | |
2786 | 2.7. The original comment mentioned the existence of a much | |
2787 | simpler and more elegant way to do this on Solaris, but didn't | |
2788 | point out what that was. */ | |
c3f6f71d JM |
2789 | |
2790 | strcpy (pathname, pi->pathname); | |
2791 | strcat (pathname, "/lwp"); | |
2792 | if ((dirp = opendir (pathname)) == NULL) | |
2793 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2794 | ||
004527cb | 2795 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2796 | while ((direntry = readdir (dirp)) != NULL) |
2797 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2798 | { | |
2799 | lwpid = atoi (&direntry->d_name[0]); | |
2800 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2801 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2802 | } | |
2803 | pi->threads_valid = 1; | |
2804 | do_cleanups (old_chain); | |
2805 | return 1; | |
2806 | } | |
2807 | #else | |
2808 | #ifdef PIOCTLIST | |
77382aee | 2809 | /* OSF version */ |
d3581e61 | 2810 | static int |
fba45db2 | 2811 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2812 | { |
2813 | int nthreads, i; | |
2814 | tid_t *threads; | |
2815 | ||
77382aee PA |
2816 | /* We should never have to apply this operation to any procinfo |
2817 | except the one for the main process. If that ever changes for | |
2818 | any reason, then take out the following clause and replace it | |
2819 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2820 | |
c3f6f71d JM |
2821 | if (pi->tid != 0) |
2822 | pi = find_procinfo_or_die (pi->pid, 0); | |
2823 | ||
2824 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2825 | ||
2826 | nthreads = proc_get_nthreads (pi); | |
2827 | if (nthreads < 2) | |
0df8b418 | 2828 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 2829 | |
3c37485b | 2830 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 2831 | |
c3f6f71d JM |
2832 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
2833 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2834 | ||
2835 | for (i = 0; i < nthreads; i++) | |
2836 | { | |
2837 | if (!find_procinfo (pi->pid, threads[i])) | |
2838 | if (!create_procinfo (pi->pid, threads[i])) | |
2839 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2840 | } |
c3f6f71d JM |
2841 | pi->threads_valid = 1; |
2842 | return 1; | |
c906108c | 2843 | } |
c3f6f71d | 2844 | #else |
77382aee | 2845 | /* Default version */ |
d3581e61 | 2846 | static int |
fba45db2 | 2847 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2848 | { |
2849 | return 0; | |
2850 | } | |
2851 | #endif /* OSF PIOCTLIST */ | |
2852 | #endif /* NEW_PROC_API */ | |
2853 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 2854 | |
77382aee PA |
2855 | /* Given a pointer to a function, call that function once for each lwp |
2856 | in the procinfo list, until the function returns non-zero, in which | |
2857 | event return the value returned by the function. | |
2858 | ||
2859 | Note: this function does NOT call update_threads. If you want to | |
2860 | discover new threads first, you must call that function explicitly. | |
2861 | This function just makes a quick pass over the currently-known | |
2862 | procinfos. | |
2863 | ||
2864 | PI is the parent process procinfo. FUNC is the per-thread | |
2865 | function. PTR is an opaque parameter for function. Returns the | |
2866 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 2867 | |
d3581e61 | 2868 | static int |
d0849a9a KB |
2869 | proc_iterate_over_threads (procinfo *pi, |
2870 | int (*func) (procinfo *, procinfo *, void *), | |
2871 | void *ptr) | |
c906108c | 2872 | { |
c3f6f71d JM |
2873 | procinfo *thread, *next; |
2874 | int retval = 0; | |
c906108c | 2875 | |
77382aee PA |
2876 | /* We should never have to apply this operation to any procinfo |
2877 | except the one for the main process. If that ever changes for | |
2878 | any reason, then take out the following clause and replace it | |
2879 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2880 | |
c3f6f71d JM |
2881 | if (pi->tid != 0) |
2882 | pi = find_procinfo_or_die (pi->pid, 0); | |
2883 | ||
2884 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 2885 | { |
0df8b418 | 2886 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
2887 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
2888 | break; | |
c906108c | 2889 | } |
c3f6f71d JM |
2890 | |
2891 | return retval; | |
c906108c SS |
2892 | } |
2893 | ||
c3f6f71d JM |
2894 | /* =================== END, Thread "MODULE" =================== */ |
2895 | ||
2896 | /* =================== END, /proc "MODULE" =================== */ | |
2897 | ||
2898 | /* =================== GDB "MODULE" =================== */ | |
2899 | ||
77382aee PA |
2900 | /* Here are all of the gdb target vector functions and their |
2901 | friends. */ | |
c3f6f71d | 2902 | |
39f77062 | 2903 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 2904 | static void do_detach (int signo); |
9185ddce | 2905 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 2906 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
2907 | |
2908 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
2909 | the startup phase. The following two variables are used to record | |
2910 | the address of the breakpoint, and the code that was replaced by | |
2911 | a breakpoint. */ | |
2912 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 2913 | static void *dbx_link_bpt; |
c3f6f71d | 2914 | |
77382aee PA |
2915 | /* Sets up the inferior to be debugged. Registers to trace signals, |
2916 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
2917 | may want to customize that. Returns zero for success (note! | |
2918 | unlike most functions in this module); on failure, returns the LINE | |
2919 | NUMBER where it failed! */ | |
c3f6f71d JM |
2920 | |
2921 | static int | |
fba45db2 | 2922 | procfs_debug_inferior (procinfo *pi) |
c906108c | 2923 | { |
c3f6f71d | 2924 | fltset_t traced_faults; |
37de36c6 KB |
2925 | gdb_sigset_t traced_signals; |
2926 | sysset_t *traced_syscall_entries; | |
2927 | sysset_t *traced_syscall_exits; | |
2928 | int status; | |
c906108c | 2929 | |
c3f6f71d JM |
2930 | #ifdef PROCFS_DONT_TRACE_FAULTS |
2931 | /* On some systems (OSF), we don't trace hardware faults. | |
2932 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
2933 | Wonder why we don't just do that in general? */ |
2934 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 2935 | #else |
0df8b418 MS |
2936 | /* Register to trace hardware faults in the child. */ |
2937 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 2938 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
2939 | #endif |
2940 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
2941 | return __LINE__; | |
c906108c | 2942 | |
2455069d UW |
2943 | /* Initially, register to trace all signals in the child. */ |
2944 | prfillset (&traced_signals); | |
2945 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
2946 | return __LINE__; |
2947 | ||
37de36c6 | 2948 | |
c3f6f71d | 2949 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
2950 | traced_syscall_entries = sysset_t_alloc (pi); |
2951 | gdb_premptysysset (traced_syscall_entries); | |
2952 | #ifdef SYS_exit | |
2953 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
2954 | #endif | |
c3f6f71d | 2955 | #ifdef SYS_lwpexit |
0df8b418 | 2956 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
2957 | #endif |
2958 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
2959 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
2960 | #endif | |
2961 | #ifdef DYNAMIC_SYSCALLS | |
2962 | { | |
2963 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 2964 | |
37de36c6 KB |
2965 | if (callnum >= 0) |
2966 | gdb_praddsysset (traced_syscall_entries, callnum); | |
2967 | } | |
c906108c SS |
2968 | #endif |
2969 | ||
37de36c6 KB |
2970 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
2971 | xfree (traced_syscall_entries); | |
2972 | if (!status) | |
c3f6f71d JM |
2973 | return __LINE__; |
2974 | ||
2975 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
2976 | /* OSF method for tracing exec syscalls. Quoting: | |
2977 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
2978 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 2979 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
2980 | { |
2981 | int prfs_flags; | |
2982 | ||
2983 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
2984 | return __LINE__; | |
2985 | ||
2986 | prfs_flags |= PRFS_STOPEXEC; | |
2987 | ||
2988 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
2989 | return __LINE__; | |
2990 | } | |
2991 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 2992 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
2993 | /* GW: Rationale... |
2994 | Not all systems with /proc have all the exec* syscalls with the same | |
2995 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 2996 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 2997 | |
37de36c6 KB |
2998 | traced_syscall_exits = sysset_t_alloc (pi); |
2999 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3000 | #ifdef SYS_exec |
37de36c6 | 3001 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3002 | #endif |
3003 | #ifdef SYS_execve | |
37de36c6 | 3004 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3005 | #endif |
3006 | #ifdef SYS_execv | |
37de36c6 | 3007 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3008 | #endif |
c5aa993b | 3009 | |
c3f6f71d | 3010 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3011 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3012 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3013 | #endif |
c5aa993b | 3014 | |
0df8b418 | 3015 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3016 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3017 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3018 | #endif |
c5aa993b | 3019 | |
37de36c6 KB |
3020 | #ifdef DYNAMIC_SYSCALLS |
3021 | { | |
3022 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3023 | |
37de36c6 KB |
3024 | if (callnum >= 0) |
3025 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3026 | callnum = find_syscall (pi, "ra_execve"); | |
3027 | if (callnum >= 0) | |
3028 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3029 | } | |
3030 | #endif | |
c906108c | 3031 | |
37de36c6 KB |
3032 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3033 | xfree (traced_syscall_exits); | |
3034 | if (!status) | |
c3f6f71d JM |
3035 | return __LINE__; |
3036 | ||
3037 | #endif /* PRFS_STOPEXEC */ | |
3038 | return 0; | |
c906108c SS |
3039 | } |
3040 | ||
19958708 | 3041 | static void |
c0939df1 | 3042 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 3043 | { |
c3f6f71d JM |
3044 | char *exec_file; |
3045 | int pid; | |
3046 | ||
74164c56 | 3047 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3048 | |
c3f6f71d | 3049 | if (pid == getpid ()) |
8a3fe4f8 | 3050 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3051 | |
c3f6f71d | 3052 | if (from_tty) |
c906108c | 3053 | { |
c3f6f71d JM |
3054 | exec_file = get_exec_file (0); |
3055 | ||
3056 | if (exec_file) | |
a3f17187 | 3057 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3058 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3059 | else |
a3f17187 | 3060 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3061 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3062 | |
3063 | fflush (stdout); | |
c906108c | 3064 | } |
39f77062 | 3065 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
3066 | if (!target_is_pushed (ops)) |
3067 | push_target (ops); | |
c3f6f71d JM |
3068 | } |
3069 | ||
19958708 | 3070 | static void |
52554a0e | 3071 | procfs_detach (struct target_ops *ops, const char *args, int from_tty) |
c3f6f71d | 3072 | { |
cc377e6b | 3073 | int sig = 0; |
dfd4cc63 | 3074 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b MK |
3075 | |
3076 | if (args) | |
3077 | sig = atoi (args); | |
c3f6f71d JM |
3078 | |
3079 | if (from_tty) | |
c906108c | 3080 | { |
cc377e6b MK |
3081 | char *exec_file; |
3082 | ||
c3f6f71d | 3083 | exec_file = get_exec_file (0); |
cc377e6b | 3084 | if (exec_file == NULL) |
c3f6f71d | 3085 | exec_file = ""; |
cc377e6b | 3086 | |
a3f17187 | 3087 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3088 | target_pid_to_str (pid_to_ptid (pid))); |
3089 | gdb_flush (gdb_stdout); | |
c906108c | 3090 | } |
19958708 | 3091 | |
cc377e6b MK |
3092 | do_detach (sig); |
3093 | ||
39f77062 | 3094 | inferior_ptid = null_ptid; |
7f9f62ba | 3095 | detach_inferior (pid); |
6a3cb8e8 | 3096 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
3097 | } |
3098 | ||
39f77062 KB |
3099 | static ptid_t |
3100 | do_attach (ptid_t ptid) | |
c906108c | 3101 | { |
c3f6f71d | 3102 | procinfo *pi; |
181e7f93 | 3103 | struct inferior *inf; |
c3f6f71d | 3104 | int fail; |
2689673f | 3105 | int lwpid; |
c3f6f71d | 3106 | |
dfd4cc63 | 3107 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 3108 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3109 | |
3110 | if (!open_procinfo_files (pi, FD_CTL)) | |
3111 | { | |
3112 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3113 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 3114 | ptid_get_pid (ptid)); |
c3f6f71d JM |
3115 | dead_procinfo (pi, errmsg, NOKILL); |
3116 | } | |
c906108c | 3117 | |
c3f6f71d JM |
3118 | /* Stop the process (if it isn't already stopped). */ |
3119 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3120 | { |
c3f6f71d JM |
3121 | pi->was_stopped = 1; |
3122 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3123 | } |
3124 | else | |
3125 | { | |
c3f6f71d JM |
3126 | pi->was_stopped = 0; |
3127 | /* Set the process to run again when we close it. */ | |
3128 | if (!proc_set_run_on_last_close (pi)) | |
3129 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3130 | ||
0df8b418 | 3131 | /* Now stop the process. */ |
c3f6f71d JM |
3132 | if (!proc_stop_process (pi)) |
3133 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3134 | pi->ignore_next_sigstop = 1; | |
c906108c | 3135 | } |
c3f6f71d JM |
3136 | /* Save some of the /proc state to be restored if we detach. */ |
3137 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3138 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3139 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3140 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3141 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3142 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3143 | NOKILL); | |
37de36c6 | 3144 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3145 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3146 | NOKILL); |
3147 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3148 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3149 | ||
3150 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3151 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3152 | ||
6c95b8df PA |
3153 | inf = current_inferior (); |
3154 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3155 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3156 | inf->attach_flag = 1; |
2689673f PA |
3157 | |
3158 | /* Create a procinfo for the current lwp. */ | |
3159 | lwpid = proc_get_current_thread (pi); | |
3160 | create_procinfo (pi->pid, lwpid); | |
3161 | ||
3162 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 3163 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
3164 | add_thread (ptid); |
3165 | ||
3166 | return ptid; | |
c906108c SS |
3167 | } |
3168 | ||
3169 | static void | |
fba45db2 | 3170 | do_detach (int signo) |
c906108c | 3171 | { |
c3f6f71d | 3172 | procinfo *pi; |
c906108c | 3173 | |
0df8b418 | 3174 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
3175 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
3176 | 0); /* FIXME: threads */ | |
c3f6f71d JM |
3177 | if (signo) |
3178 | if (!proc_set_current_signal (pi, signo)) | |
3179 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3180 | |
c3f6f71d JM |
3181 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3182 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3183 | |
c3f6f71d JM |
3184 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3185 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3186 | ||
37de36c6 | 3187 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3188 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3189 | ||
37de36c6 | 3190 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3191 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3192 | ||
3193 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3194 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3195 | ||
3196 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3197 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3198 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3199 | { |
3200 | /* Clear any pending signal. */ | |
3201 | if (!proc_clear_current_fault (pi)) | |
3202 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3203 | ||
1a303dec MS |
3204 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3205 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3206 | ||
c3f6f71d JM |
3207 | if (!proc_set_run_on_last_close (pi)) |
3208 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3209 | } | |
3210 | ||
c3f6f71d | 3211 | destroy_procinfo (pi); |
c906108c SS |
3212 | } |
3213 | ||
772cf8be MK |
3214 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3215 | for all registers. | |
3216 | ||
3217 | ??? Is the following note still relevant? We can't get individual | |
3218 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3219 | don't bother with caching at all in that case. | |
3220 | ||
3221 | NOTE: Since the /proc interface cannot give us individual | |
3222 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3223 | This results in the possibility that we will do unnecessarily many | |
3224 | fetches, since we may be called repeatedly for individual | |
3225 | registers. So we cache the results, and mark the cache invalid | |
3226 | when the process is resumed. */ | |
c3f6f71d | 3227 | |
c906108c | 3228 | static void |
28439f5e PA |
3229 | procfs_fetch_registers (struct target_ops *ops, |
3230 | struct regcache *regcache, int regnum) | |
c906108c | 3231 | { |
772cf8be MK |
3232 | gdb_gregset_t *gregs; |
3233 | procinfo *pi; | |
dfd4cc63 LM |
3234 | int pid = ptid_get_pid (inferior_ptid); |
3235 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3236 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3237 | |
2689673f | 3238 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3239 | |
3240 | if (pi == NULL) | |
8a3fe4f8 | 3241 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3242 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3243 | |
772cf8be MK |
3244 | gregs = proc_get_gregs (pi); |
3245 | if (gregs == NULL) | |
c3f6f71d JM |
3246 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3247 | ||
56be3814 | 3248 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3249 | |
40a6adc1 | 3250 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3251 | { |
772cf8be MK |
3252 | gdb_fpregset_t *fpregs; |
3253 | ||
40a6adc1 MD |
3254 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3255 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3256 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3257 | return; /* Not a floating point register. */ |
c5aa993b | 3258 | |
772cf8be MK |
3259 | fpregs = proc_get_fpregs (pi); |
3260 | if (fpregs == NULL) | |
60054393 | 3261 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3262 | |
56be3814 | 3263 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3264 | } |
c906108c SS |
3265 | } |
3266 | ||
772cf8be MK |
3267 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3268 | this for all registers. | |
3269 | ||
3270 | NOTE: Since the /proc interface will not read individual registers, | |
3271 | we will cache these requests until the process is resumed, and only | |
3272 | then write them back to the inferior process. | |
77382aee | 3273 | |
772cf8be MK |
3274 | FIXME: is that a really bad idea? Have to think about cases where |
3275 | writing one register might affect the value of others, etc. */ | |
c906108c | 3276 | |
c3f6f71d | 3277 | static void |
28439f5e PA |
3278 | procfs_store_registers (struct target_ops *ops, |
3279 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3280 | { |
772cf8be MK |
3281 | gdb_gregset_t *gregs; |
3282 | procinfo *pi; | |
dfd4cc63 LM |
3283 | int pid = ptid_get_pid (inferior_ptid); |
3284 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3285 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3286 | |
2689673f | 3287 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3288 | |
3289 | if (pi == NULL) | |
8a3fe4f8 | 3290 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3291 | target_pid_to_str (inferior_ptid)); |
c906108c | 3292 | |
772cf8be MK |
3293 | gregs = proc_get_gregs (pi); |
3294 | if (gregs == NULL) | |
c3f6f71d | 3295 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3296 | |
56be3814 | 3297 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3298 | if (!proc_set_gregs (pi)) |
3299 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3300 | |
40a6adc1 | 3301 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3302 | { |
772cf8be MK |
3303 | gdb_fpregset_t *fpregs; |
3304 | ||
40a6adc1 MD |
3305 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3306 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3307 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3308 | return; /* Not a floating point register. */ |
60054393 | 3309 | |
772cf8be MK |
3310 | fpregs = proc_get_fpregs (pi); |
3311 | if (fpregs == NULL) | |
60054393 MS |
3312 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3313 | ||
56be3814 | 3314 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3315 | if (!proc_set_fpregs (pi)) |
3316 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3317 | } | |
c3f6f71d | 3318 | } |
c906108c | 3319 | |
37de36c6 KB |
3320 | static int |
3321 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3322 | { | |
37de36c6 KB |
3323 | #ifdef SYS_lwp_exit |
3324 | if (scall == SYS_lwp_exit) | |
3325 | return 1; | |
3326 | #endif | |
3327 | #ifdef SYS_lwpexit | |
3328 | if (scall == SYS_lwpexit) | |
3329 | return 1; | |
3330 | #endif | |
3331 | return 0; | |
3332 | } | |
3333 | ||
3334 | static int | |
3335 | syscall_is_exit (procinfo *pi, int scall) | |
3336 | { | |
3337 | #ifdef SYS_exit | |
3338 | if (scall == SYS_exit) | |
3339 | return 1; | |
3340 | #endif | |
3341 | #ifdef DYNAMIC_SYSCALLS | |
3342 | if (find_syscall (pi, "_exit") == scall) | |
3343 | return 1; | |
3344 | #endif | |
3345 | return 0; | |
3346 | } | |
3347 | ||
3348 | static int | |
3349 | syscall_is_exec (procinfo *pi, int scall) | |
3350 | { | |
3351 | #ifdef SYS_exec | |
3352 | if (scall == SYS_exec) | |
3353 | return 1; | |
3354 | #endif | |
3355 | #ifdef SYS_execv | |
3356 | if (scall == SYS_execv) | |
3357 | return 1; | |
3358 | #endif | |
3359 | #ifdef SYS_execve | |
3360 | if (scall == SYS_execve) | |
3361 | return 1; | |
3362 | #endif | |
3363 | #ifdef DYNAMIC_SYSCALLS | |
3364 | if (find_syscall (pi, "_execve")) | |
3365 | return 1; | |
3366 | if (find_syscall (pi, "ra_execve")) | |
3367 | return 1; | |
3368 | #endif | |
3369 | return 0; | |
3370 | } | |
3371 | ||
3372 | static int | |
3373 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3374 | { | |
3375 | #ifdef SYS_lwp_create | |
3376 | if (scall == SYS_lwp_create) | |
3377 | return 1; | |
3378 | #endif | |
3379 | #ifdef SYS_lwpcreate | |
3380 | if (scall == SYS_lwpcreate) | |
3381 | return 1; | |
3382 | #endif | |
3383 | return 0; | |
3384 | } | |
3385 | ||
7434dadd JB |
3386 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3387 | Does nothing if the breakpoint hasn't been inserted or has already | |
3388 | been removed. */ | |
3389 | ||
3390 | static void | |
3391 | remove_dbx_link_breakpoint (void) | |
3392 | { | |
3393 | if (dbx_link_bpt_addr == 0) | |
3394 | return; | |
3395 | ||
f5656ead | 3396 | if (deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt) != 0) |
7434dadd JB |
3397 | warning (_("Unable to remove __dbx_link breakpoint.")); |
3398 | ||
3399 | dbx_link_bpt_addr = 0; | |
3400 | dbx_link_bpt = NULL; | |
3401 | } | |
3402 | ||
3403 | #ifdef SYS_syssgi | |
3404 | /* Return the address of the __dbx_link() function in the file | |
3405 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3406 | the symbol was not found. */ | |
3407 | ||
3408 | static CORE_ADDR | |
3409 | dbx_link_addr (bfd *abfd) | |
3410 | { | |
3411 | long storage_needed; | |
3412 | asymbol **symbol_table; | |
3413 | long number_of_symbols; | |
3414 | long i; | |
3415 | ||
3416 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3417 | if (storage_needed <= 0) | |
3418 | return 0; | |
3419 | ||
3420 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3421 | make_cleanup (xfree, symbol_table); | |
3422 | ||
3423 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3424 | ||
3425 | for (i = 0; i < number_of_symbols; i++) | |
3426 | { | |
3427 | asymbol *sym = symbol_table[i]; | |
3428 | ||
3429 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3430 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3431 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3432 | } |
3433 | ||
3434 | /* Symbol not found, return NULL. */ | |
3435 | return 0; | |
3436 | } | |
3437 | ||
3438 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3439 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3440 | and return nonzero. Return zero otherwise. */ |
3441 | ||
3442 | static int | |
3443 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3444 | { | |
3445 | bfd *abfd; | |
3446 | long storage_needed; | |
3447 | CORE_ADDR sym_addr; | |
3448 | ||
64c31149 | 3449 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
7434dadd JB |
3450 | if (abfd == NULL) |
3451 | { | |
3452 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3453 | return 0; | |
3454 | } | |
3455 | ||
3456 | if (!bfd_check_format (abfd, bfd_object)) | |
3457 | { | |
3458 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3459 | symbol in it. */ |
cbb099e8 | 3460 | gdb_bfd_unref (abfd); |
7434dadd JB |
3461 | return 0; |
3462 | } | |
3463 | ||
3464 | sym_addr = dbx_link_addr (abfd); | |
3465 | if (sym_addr != 0) | |
3466 | { | |
3467 | /* Insert the breakpoint. */ | |
3468 | dbx_link_bpt_addr = sym_addr; | |
f5656ead | 3469 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch (), NULL, |
7434dadd JB |
3470 | sym_addr); |
3471 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3472 | { |
3473 | warning (_("Failed to insert dbx_link breakpoint.")); | |
cbb099e8 | 3474 | gdb_bfd_unref (abfd); |
77382aee PA |
3475 | return 0; |
3476 | } | |
cbb099e8 | 3477 | gdb_bfd_unref (abfd); |
7434dadd JB |
3478 | return 1; |
3479 | } | |
3480 | ||
cbb099e8 | 3481 | gdb_bfd_unref (abfd); |
7434dadd JB |
3482 | return 0; |
3483 | } | |
3484 | ||
e294797a | 3485 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3486 | space in the process. The callback function receives an open file |
3487 | descriptor for the file corresponding to that mapped address space | |
3488 | (if there is one), and the base address of the mapped space. Quit | |
3489 | when the callback function returns a nonzero value, or at teh end | |
3490 | of the mappings. Returns the first non-zero return value of the | |
3491 | callback function, or zero. */ | |
e294797a JB |
3492 | |
3493 | static int | |
3494 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3495 | void *data) | |
3496 | { | |
3497 | procinfo *pi = data; | |
3498 | int fd; | |
3499 | ||
3500 | #ifdef NEW_PROC_API | |
3501 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3502 | ||
3503 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3504 | return -1; /* sanity */ | |
3505 | ||
3506 | if (map->pr_mapname[0] == 0) | |
3507 | { | |
3508 | fd = -1; /* no map file */ | |
3509 | } | |
3510 | else | |
3511 | { | |
3512 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3513 | /* Note: caller's responsibility to close this fd! */ | |
3514 | fd = open_with_retry (name, O_RDONLY); | |
3515 | /* Note: we don't test the above call for failure; | |
3516 | we just pass the FD on as given. Sometimes there is | |
3517 | no file, so the open may return failure, but that's | |
3518 | not a problem. */ | |
3519 | } | |
3520 | #else | |
3521 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3522 | /* Note: we don't test the above call for failure; | |
3523 | we just pass the FD on as given. Sometimes there is | |
3524 | no file, so the ioctl may return failure, but that's | |
3525 | not a problem. */ | |
3526 | #endif | |
3527 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3528 | } | |
3529 | ||
7434dadd JB |
3530 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3531 | insert a breakpoint at this location and return nonzero. Return | |
3532 | zero otherwise. */ | |
3533 | ||
3534 | static int | |
3535 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3536 | find_memory_region_ftype child_func, |
77382aee | 3537 | void *data) |
7434dadd JB |
3538 | { |
3539 | procinfo *pi = (procinfo *) data; | |
3540 | ||
3541 | /* We know the symbol we're looking for is in a text region, so | |
3542 | only look for it if the region is a text one. */ | |
3543 | if (map->pr_mflags & MA_EXEC) | |
3544 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3545 | ||
3546 | return 0; | |
3547 | } | |
3548 | ||
3549 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3550 | insert a breakpoint at its location, and return nonzero. Return zero | |
3551 | otherwise. */ | |
3552 | ||
3553 | static int | |
3554 | insert_dbx_link_breakpoint (procinfo *pi) | |
3555 | { | |
3556 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3557 | } | |
3558 | #endif | |
3559 | ||
77382aee PA |
3560 | /* Retrieve the next stop event from the child process. If child has |
3561 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3562 | (or possibly wait eventcodes) into gdb internal event codes. | |
3563 | Returns the id of process (and possibly thread) that incurred the | |
3564 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3565 | |
39f77062 | 3566 | static ptid_t |
117de6a9 | 3567 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3568 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3569 | { |
0df8b418 | 3570 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3571 | procinfo *pi; |
39f77062 KB |
3572 | int wstat; |
3573 | int temp_tid; | |
3574 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3575 | int why, what, flags; |
3576 | int retry = 0; | |
c906108c | 3577 | |
c3f6f71d | 3578 | wait_again: |
c906108c | 3579 | |
c3f6f71d JM |
3580 | retry++; |
3581 | wstat = 0; | |
39f77062 | 3582 | retval = pid_to_ptid (-1); |
c906108c | 3583 | |
0df8b418 | 3584 | /* Find procinfo for main process. */ |
dfd4cc63 | 3585 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 3586 | if (pi) |
c906108c | 3587 | { |
0df8b418 | 3588 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3589 | pi->status_valid = 0; |
3590 | pi->gregs_valid = 0; | |
3591 | pi->fpregs_valid = 0; | |
3592 | ||
0df8b418 | 3593 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3594 | flags = proc_flags (pi); |
3595 | why = proc_why (pi); | |
3596 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3597 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3598 | #endif |
3599 | /* If child is not stopped, wait for it to stop. */ | |
3600 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3601 | !proc_wait_for_stop (pi)) | |
c906108c | 3602 | { |
0df8b418 | 3603 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3604 | if (errno == ENOENT) |
c906108c | 3605 | { |
39f77062 KB |
3606 | int wait_retval; |
3607 | ||
0df8b418 MS |
3608 | /* /proc file not found; presumably child has terminated. */ |
3609 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3610 | |
dfd4cc63 LM |
3611 | /* Wrong child? */ |
3612 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
3613 | error (_("procfs: couldn't stop " |
3614 | "process %d: wait returned %d."), | |
dfd4cc63 | 3615 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 3616 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3617 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3618 | retval = pid_to_ptid (wait_retval); |
c906108c | 3619 | } |
d1566ff5 FN |
3620 | else if (errno == EINTR) |
3621 | goto wait_again; | |
c3f6f71d | 3622 | else |
c906108c | 3623 | { |
0df8b418 | 3624 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3625 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3626 | } |
c3f6f71d JM |
3627 | } |
3628 | else | |
3629 | { | |
3630 | /* This long block is reached if either: | |
3631 | a) the child was already stopped, or | |
3632 | b) we successfully waited for the child with wait_for_stop. | |
3633 | This block will analyze the /proc status, and translate it | |
3634 | into a waitstatus for GDB. | |
3635 | ||
3636 | If we actually had to call wait because the /proc file | |
19958708 | 3637 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3638 | because we already have a waitstatus. */ |
3639 | ||
3640 | flags = proc_flags (pi); | |
3641 | why = proc_why (pi); | |
3642 | what = proc_what (pi); | |
3643 | ||
c3f6f71d | 3644 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3645 | { |
c3f6f71d JM |
3646 | #ifdef PR_ASYNC |
3647 | /* If it's running async (for single_thread control), | |
3648 | set it back to normal again. */ | |
3649 | if (flags & PR_ASYNC) | |
3650 | if (!proc_unset_async (pi)) | |
3651 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3652 | #endif | |
3653 | ||
3654 | if (info_verbose) | |
3655 | proc_prettyprint_why (why, what, 1); | |
3656 | ||
3657 | /* The 'pid' we will return to GDB is composed of | |
3658 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 3659 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
3660 | |
3661 | switch (why) { | |
3662 | case PR_SIGNALLED: | |
3663 | wstat = (what << 8) | 0177; | |
3664 | break; | |
3665 | case PR_SYSENTRY: | |
37de36c6 | 3666 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3667 | { |
17faa917 DJ |
3668 | if (print_thread_events) |
3669 | printf_unfiltered (_("[%s exited]\n"), | |
3670 | target_pid_to_str (retval)); | |
37de36c6 KB |
3671 | delete_thread (retval); |
3672 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3673 | return retval; | |
3674 | } | |
3675 | else if (syscall_is_exit (pi, what)) | |
3676 | { | |
181e7f93 PA |
3677 | struct inferior *inf; |
3678 | ||
0df8b418 | 3679 | /* Handle SYS_exit call only. */ |
37de36c6 | 3680 | /* Stopped at entry to SYS_exit. |
19958708 | 3681 | Make it runnable, resume it, then use |
37de36c6 | 3682 | the wait system call to get its exit code. |
19958708 | 3683 | Proc_run_process always clears the current |
37de36c6 KB |
3684 | fault and signal. |
3685 | Then return its exit status. */ | |
3686 | pi->status_valid = 0; | |
3687 | wstat = 0; | |
19958708 | 3688 | /* FIXME: what we should do is return |
37de36c6 KB |
3689 | TARGET_WAITKIND_SPURIOUS. */ |
3690 | if (!proc_run_process (pi, 0, 0)) | |
3691 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3692 | |
3693 | inf = find_inferior_pid (pi->pid); | |
3694 | if (inf->attach_flag) | |
c3f6f71d | 3695 | { |
19958708 | 3696 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3697 | return a "success" exit code. Bogus: what if |
3698 | it returns something else? */ | |
3699 | wstat = 0; | |
39f77062 | 3700 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3701 | } |
3702 | else | |
3703 | { | |
3704 | int temp = wait (&wstat); | |
3705 | ||
3706 | /* FIXME: shouldn't I make sure I get the right | |
3707 | event from the right process? If (for | |
3708 | instance) I have killed an earlier inferior | |
3709 | process but failed to clean up after it | |
3710 | somehow, I could get its termination event | |
3711 | here. */ | |
3712 | ||
0df8b418 MS |
3713 | /* If wait returns -1, that's what we return |
3714 | to GDB. */ | |
37de36c6 | 3715 | if (temp < 0) |
39f77062 | 3716 | retval = pid_to_ptid (temp); |
c3f6f71d | 3717 | } |
c3f6f71d | 3718 | } |
37de36c6 KB |
3719 | else |
3720 | { | |
a3f17187 | 3721 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3722 | proc_prettyprint_syscall (proc_what (pi), 0); |
3723 | printf_filtered ("\n"); | |
3724 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3725 | { |
37de36c6 | 3726 | long i, nsysargs, *sysargs; |
c3f6f71d | 3727 | |
37de36c6 KB |
3728 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3729 | (sysargs = proc_sysargs (pi)) != NULL) | |
3730 | { | |
3e43a32a MS |
3731 | printf_filtered (_("%ld syscall arguments:\n"), |
3732 | nsysargs); | |
37de36c6 | 3733 | for (i = 0; i < nsysargs; i++) |
19958708 | 3734 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3735 | i, sysargs[i]); |
3736 | } | |
c3f6f71d | 3737 | |
c3f6f71d | 3738 | } |
c3f6f71d | 3739 | #endif |
37de36c6 KB |
3740 | if (status) |
3741 | { | |
0df8b418 MS |
3742 | /* How to exit gracefully, returning "unknown |
3743 | event". */ | |
37de36c6 | 3744 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3745 | return inferior_ptid; |
37de36c6 KB |
3746 | } |
3747 | else | |
3748 | { | |
3749 | /* How to keep going without returning to wfi: */ | |
a493e3e2 | 3750 | target_resume (ptid, 0, GDB_SIGNAL_0); |
37de36c6 KB |
3751 | goto wait_again; |
3752 | } | |
3753 | } | |
3754 | break; | |
3755 | case PR_SYSEXIT: | |
3756 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3757 | { |
37de36c6 KB |
3758 | /* Hopefully this is our own "fork-child" execing |
3759 | the real child. Hoax this event into a trap, and | |
3760 | GDB will see the child about to execute its start | |
0df8b418 | 3761 | address. */ |
37de36c6 KB |
3762 | wstat = (SIGTRAP << 8) | 0177; |
3763 | } | |
9185ddce | 3764 | #ifdef SYS_syssgi |
77382aee PA |
3765 | else if (what == SYS_syssgi) |
3766 | { | |
3767 | /* see if we can break on dbx_link(). If yes, then | |
3768 | we no longer need the SYS_syssgi notifications. */ | |
3769 | if (insert_dbx_link_breakpoint (pi)) | |
3770 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
3771 | FLAG_RESET, 0); | |
3772 | ||
3773 | /* This is an internal event and should be transparent | |
3774 | to wfi, so resume the execution and wait again. See | |
3775 | comment in procfs_init_inferior() for more details. */ | |
a493e3e2 | 3776 | target_resume (ptid, 0, GDB_SIGNAL_0); |
77382aee PA |
3777 | goto wait_again; |
3778 | } | |
9185ddce | 3779 | #endif |
37de36c6 KB |
3780 | else if (syscall_is_lwp_create (pi, what)) |
3781 | { | |
77382aee PA |
3782 | /* This syscall is somewhat like fork/exec. We |
3783 | will get the event twice: once for the parent | |
3784 | LWP, and once for the child. We should already | |
3785 | know about the parent LWP, but the child will | |
3786 | be new to us. So, whenever we get this event, | |
3787 | if it represents a new thread, simply add the | |
3788 | thread to the list. */ | |
c3f6f71d | 3789 | |
37de36c6 | 3790 | /* If not in procinfo list, add it. */ |
39f77062 KB |
3791 | temp_tid = proc_get_current_thread (pi); |
3792 | if (!find_procinfo (pi->pid, temp_tid)) | |
3793 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 3794 | |
dfd4cc63 | 3795 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 3796 | /* If not in GDB's thread list, add it. */ |
39f77062 | 3797 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
3798 | add_thread (temp_ptid); |
3799 | ||
0df8b418 | 3800 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 3801 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3802 | return inferior_ptid; |
37de36c6 KB |
3803 | } |
3804 | else if (syscall_is_lwp_exit (pi, what)) | |
3805 | { | |
17faa917 DJ |
3806 | if (print_thread_events) |
3807 | printf_unfiltered (_("[%s exited]\n"), | |
3808 | target_pid_to_str (retval)); | |
37de36c6 KB |
3809 | delete_thread (retval); |
3810 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3811 | return retval; | |
c3f6f71d | 3812 | } |
37de36c6 KB |
3813 | else if (0) |
3814 | { | |
3815 | /* FIXME: Do we need to handle SYS_sproc, | |
3816 | SYS_fork, or SYS_vfork here? The old procfs | |
3817 | seemed to use this event to handle threads on | |
3818 | older (non-LWP) systems, where I'm assuming | |
19958708 | 3819 | that threads were actually separate processes. |
37de36c6 KB |
3820 | Irix, maybe? Anyway, low priority for now. */ |
3821 | } | |
3822 | else | |
3823 | { | |
a3f17187 | 3824 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
3825 | proc_prettyprint_syscall (proc_what (pi), 0); |
3826 | printf_filtered ("\n"); | |
3827 | #ifndef PIOCSSPCACT | |
3828 | { | |
3829 | long i, nsysargs, *sysargs; | |
3830 | ||
3831 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3832 | (sysargs = proc_sysargs (pi)) != NULL) | |
3833 | { | |
77382aee PA |
3834 | printf_filtered (_("%ld syscall arguments:\n"), |
3835 | nsysargs); | |
37de36c6 | 3836 | for (i = 0; i < nsysargs; i++) |
19958708 | 3837 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3838 | i, sysargs[i]); |
3839 | } | |
3840 | } | |
c3f6f71d | 3841 | #endif |
37de36c6 | 3842 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3843 | return inferior_ptid; |
37de36c6 | 3844 | } |
c3f6f71d JM |
3845 | break; |
3846 | case PR_REQUESTED: | |
3847 | #if 0 /* FIXME */ | |
3848 | wstat = (SIGSTOP << 8) | 0177; | |
3849 | break; | |
3850 | #else | |
3851 | if (retry < 5) | |
3852 | { | |
a3f17187 | 3853 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
3854 | pi->status_valid = 0; |
3855 | goto wait_again; | |
3856 | } | |
3857 | else | |
3858 | { | |
3859 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
3860 | temp_tid = proc_get_current_thread (pi); |
3861 | if (!find_procinfo (pi->pid, temp_tid)) | |
3862 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
3863 | |
3864 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 3865 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 3866 | if (!in_thread_list (temp_ptid)) |
93815fbf | 3867 | add_thread (temp_ptid); |
c3f6f71d JM |
3868 | |
3869 | status->kind = TARGET_WAITKIND_STOPPED; | |
3870 | status->value.sig = 0; | |
3871 | return retval; | |
3872 | } | |
3873 | #endif | |
3874 | case PR_JOBCONTROL: | |
3875 | wstat = (what << 8) | 0177; | |
3876 | break; | |
3877 | case PR_FAULTED: | |
7af6341f | 3878 | switch (what) { |
c3f6f71d JM |
3879 | #ifdef FLTWATCH |
3880 | case FLTWATCH: | |
3881 | wstat = (SIGTRAP << 8) | 0177; | |
3882 | break; | |
3883 | #endif | |
3884 | #ifdef FLTKWATCH | |
3885 | case FLTKWATCH: | |
3886 | wstat = (SIGTRAP << 8) | 0177; | |
3887 | break; | |
3888 | #endif | |
0df8b418 | 3889 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 3890 | case FLTPRIV: |
0df8b418 | 3891 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3892 | case FLTILL: |
3893 | #endif | |
3894 | wstat = (SIGILL << 8) | 0177; | |
3895 | break; | |
3896 | case FLTBPT: | |
0df8b418 | 3897 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3898 | case FLTTRACE: |
3899 | #endif | |
77382aee PA |
3900 | /* If we hit our __dbx_link() internal breakpoint, |
3901 | then remove it. See comments in procfs_init_inferior() | |
3902 | for more details. */ | |
3903 | if (dbx_link_bpt_addr != 0 | |
3904 | && dbx_link_bpt_addr | |
fb14de7b | 3905 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 3906 | remove_dbx_link_breakpoint (); |
9185ddce | 3907 | |
c3f6f71d JM |
3908 | wstat = (SIGTRAP << 8) | 0177; |
3909 | break; | |
3910 | case FLTSTACK: | |
3911 | case FLTACCESS: | |
0df8b418 | 3912 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3913 | case FLTBOUNDS: |
3914 | #endif | |
3915 | wstat = (SIGSEGV << 8) | 0177; | |
3916 | break; | |
3917 | case FLTIOVF: | |
3918 | case FLTIZDIV: | |
0df8b418 | 3919 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3920 | case FLTFPE: |
3921 | #endif | |
3922 | wstat = (SIGFPE << 8) | 0177; | |
3923 | break; | |
3e43a32a | 3924 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
3925 | default: /* FIXME: use si_signo if possible for |
3926 | fault. */ | |
39f77062 | 3927 | retval = pid_to_ptid (-1); |
c3f6f71d | 3928 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 3929 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3930 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3931 | error (_("... giving up...")); |
c3f6f71d JM |
3932 | break; |
3933 | } | |
3934 | break; /* case PR_FAULTED: */ | |
3935 | default: /* switch (why) unmatched */ | |
3936 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 3937 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3938 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3939 | error (_("... giving up...")); |
c3f6f71d JM |
3940 | break; |
3941 | } | |
77382aee PA |
3942 | /* Got this far without error: If retval isn't in the |
3943 | threads database, add it. */ | |
dfd4cc63 | 3944 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 3945 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 3946 | !in_thread_list (retval)) |
c906108c | 3947 | { |
77382aee PA |
3948 | /* We have a new thread. We need to add it both to |
3949 | GDB's list and to our own. If we don't create a | |
3950 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 3951 | add_thread (retval); |
dfd4cc63 LM |
3952 | if (find_procinfo (ptid_get_pid (retval), |
3953 | ptid_get_lwp (retval)) == NULL) | |
3954 | create_procinfo (ptid_get_pid (retval), | |
3955 | ptid_get_lwp (retval)); | |
c906108c | 3956 | } |
c906108c | 3957 | } |
0df8b418 | 3958 | else /* Flags do not indicate STOPPED. */ |
c906108c | 3959 | { |
0df8b418 | 3960 | /* surely this can't happen... */ |
c3f6f71d JM |
3961 | printf_filtered ("procfs:%d -- process not stopped.\n", |
3962 | __LINE__); | |
3963 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 3964 | error (_("procfs: ...giving up...")); |
c906108c | 3965 | } |
c906108c | 3966 | } |
c906108c | 3967 | |
c3f6f71d JM |
3968 | if (status) |
3969 | store_waitstatus (status, wstat); | |
c906108c SS |
3970 | } |
3971 | ||
c3f6f71d JM |
3972 | return retval; |
3973 | } | |
c906108c | 3974 | |
4e73f23d RM |
3975 | /* Perform a partial transfer to/from the specified object. For |
3976 | memory transfers, fall back to the old memory xfer functions. */ | |
3977 | ||
9b409511 | 3978 | static enum target_xfer_status |
4e73f23d | 3979 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 3980 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
3981 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
3982 | ULONGEST *xfered_len) | |
4e73f23d RM |
3983 | { |
3984 | switch (object) | |
3985 | { | |
3986 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 3987 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d RM |
3988 | |
3989 | #ifdef NEW_PROC_API | |
3990 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 3991 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 3992 | offset, len, xfered_len); |
4e73f23d RM |
3993 | #endif |
3994 | ||
3995 | default: | |
e75fdfca TT |
3996 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
3997 | readbuf, writebuf, offset, len, | |
3998 | xfered_len); | |
4e73f23d RM |
3999 | } |
4000 | } | |
4001 | ||
e96027e0 PA |
4002 | /* Helper for procfs_xfer_partial that handles memory transfers. |
4003 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 4004 | |
e96027e0 PA |
4005 | static enum target_xfer_status |
4006 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
4007 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
4008 | { |
4009 | procinfo *pi; | |
e96027e0 | 4010 | int nbytes; |
c906108c | 4011 | |
0df8b418 | 4012 | /* Find procinfo for main process. */ |
dfd4cc63 | 4013 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4014 | if (pi->as_fd == 0 && |
4015 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4016 | { |
c3f6f71d | 4017 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 4018 | return TARGET_XFER_E_IO; |
c906108c | 4019 | } |
c906108c | 4020 | |
e96027e0 PA |
4021 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
4022 | return TARGET_XFER_E_IO; | |
4023 | ||
4024 | if (writebuf != NULL) | |
c906108c | 4025 | { |
e96027e0 PA |
4026 | PROCFS_NOTE ("write memory:\n"); |
4027 | nbytes = write (pi->as_fd, writebuf, len); | |
4028 | } | |
4029 | else | |
4030 | { | |
4031 | PROCFS_NOTE ("read memory:\n"); | |
4032 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 4033 | } |
e96027e0 PA |
4034 | if (nbytes <= 0) |
4035 | return TARGET_XFER_E_IO; | |
4036 | *xfered_len = nbytes; | |
4037 | return TARGET_XFER_OK; | |
c906108c SS |
4038 | } |
4039 | ||
77382aee PA |
4040 | /* Called by target_resume before making child runnable. Mark cached |
4041 | registers and status's invalid. If there are "dirty" caches that | |
4042 | need to be written back to the child process, do that. | |
c906108c | 4043 | |
77382aee PA |
4044 | File descriptors are also cached. As they are a limited resource, |
4045 | we cannot hold onto them indefinitely. However, as they are | |
4046 | expensive to open, we don't want to throw them away | |
4047 | indescriminately either. As a compromise, we will keep the file | |
4048 | descriptors for the parent process, but discard any file | |
4049 | descriptors we may have accumulated for the threads. | |
4050 | ||
4051 | As this function is called by iterate_over_threads, it always | |
4052 | returns zero (so that iterate_over_threads will keep | |
4053 | iterating). */ | |
c3f6f71d JM |
4054 | |
4055 | static int | |
fba45db2 | 4056 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4057 | { |
77382aee PA |
4058 | /* About to run the child; invalidate caches and do any other |
4059 | cleanup. */ | |
c906108c | 4060 | |
c3f6f71d JM |
4061 | #if 0 |
4062 | if (pi->gregs_dirty) | |
4063 | if (parent == NULL || | |
4064 | proc_get_current_thread (parent) != pi->tid) | |
4065 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4066 | proc_warn (pi, "target_resume, set_gregs", | |
4067 | __LINE__); | |
f5656ead | 4068 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
4069 | if (pi->fpregs_dirty) |
4070 | if (parent == NULL || | |
4071 | proc_get_current_thread (parent) != pi->tid) | |
4072 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4073 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4074 | __LINE__); |
c906108c | 4075 | #endif |
c906108c | 4076 | |
c3f6f71d | 4077 | if (parent != NULL) |
c906108c | 4078 | { |
c3f6f71d | 4079 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4080 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4081 | We don't do this to the master (parent) procinfo. */ |
4082 | ||
4083 | close_procinfo_files (pi); | |
c906108c | 4084 | } |
c3f6f71d JM |
4085 | pi->gregs_valid = 0; |
4086 | pi->fpregs_valid = 0; | |
4087 | #if 0 | |
4088 | pi->gregs_dirty = 0; | |
4089 | pi->fpregs_dirty = 0; | |
c906108c | 4090 | #endif |
c3f6f71d JM |
4091 | pi->status_valid = 0; |
4092 | pi->threads_valid = 0; | |
c906108c | 4093 | |
c3f6f71d | 4094 | return 0; |
c906108c SS |
4095 | } |
4096 | ||
0fda6bd2 | 4097 | #if 0 |
77382aee PA |
4098 | /* A callback function for iterate_over_threads. Find the |
4099 | asynchronous signal thread, and make it runnable. See if that | |
4100 | helps matters any. */ | |
c906108c | 4101 | |
c3f6f71d | 4102 | static int |
fba45db2 | 4103 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4104 | { |
c3f6f71d JM |
4105 | #ifdef PR_ASLWP |
4106 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4107 | { |
c3f6f71d JM |
4108 | if (!proc_run_process (pi, 0, -1)) |
4109 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4110 | return 1; | |
c906108c | 4111 | } |
c906108c | 4112 | #endif |
c3f6f71d | 4113 | return 0; |
c906108c | 4114 | } |
0fda6bd2 | 4115 | #endif |
c906108c | 4116 | |
77382aee PA |
4117 | /* Make the child process runnable. Normally we will then call |
4118 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4119 | ||
4120 | If STEP is true, then arrange for the child to stop again after | |
4121 | executing a single instruction. If SIGNO is zero, then cancel any | |
4122 | pending signal; if non-zero, then arrange for the indicated signal | |
4123 | to be delivered to the child when it runs. If PID is -1, then | |
4124 | allow any child thread to run; if non-zero, then allow only the | |
4125 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4126 | |
4127 | static void | |
28439f5e | 4128 | procfs_resume (struct target_ops *ops, |
2ea28649 | 4129 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 4130 | { |
c3f6f71d JM |
4131 | procinfo *pi, *thread; |
4132 | int native_signo; | |
4133 | ||
19958708 | 4134 | /* 2.1: |
c3f6f71d | 4135 | prrun.prflags |= PRSVADDR; |
19958708 | 4136 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4137 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4138 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4139 | prrun.prflags |= PRCFAULT; clear current fault. |
4140 | ||
4141 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4142 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4143 | PRSVADDR is unnecessary. |
4144 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4145 | This basically leaves PRSTEP and PRCSIG. | |
4146 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4147 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4148 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4149 | |
0df8b418 | 4150 | /* Find procinfo for main process. */ |
dfd4cc63 | 4151 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 4152 | |
77382aee | 4153 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4154 | errno = 0; |
c906108c | 4155 | |
c3f6f71d JM |
4156 | /* Convert signal to host numbering. */ |
4157 | if (signo == 0 || | |
a493e3e2 | 4158 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4159 | native_signo = 0; |
4160 | else | |
2ea28649 | 4161 | native_signo = gdb_signal_to_host (signo); |
c906108c | 4162 | |
c3f6f71d | 4163 | pi->ignore_next_sigstop = 0; |
c906108c | 4164 | |
77382aee PA |
4165 | /* Running the process voids all cached registers and status. */ |
4166 | /* Void the threads' caches first. */ | |
19958708 | 4167 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4168 | /* Void the process procinfo's caches. */ |
4169 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4170 | |
dfd4cc63 | 4171 | if (ptid_get_pid (ptid) != -1) |
c906108c | 4172 | { |
77382aee PA |
4173 | /* Resume a specific thread, presumably suppressing the |
4174 | others. */ | |
dfd4cc63 | 4175 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 4176 | if (thread != NULL) |
c906108c | 4177 | { |
c3f6f71d JM |
4178 | if (thread->tid != 0) |
4179 | { | |
77382aee PA |
4180 | /* We're to resume a specific thread, and not the |
4181 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4182 | #ifdef PR_ASYNC |
4183 | if (!proc_set_async (pi)) | |
4184 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4185 | #endif | |
4186 | #if 0 | |
19958708 | 4187 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4188 | make_signal_thread_runnable, |
4189 | NULL); | |
4190 | #endif | |
0df8b418 MS |
4191 | pi = thread; /* Substitute the thread's procinfo |
4192 | for run. */ | |
c3f6f71d | 4193 | } |
c906108c SS |
4194 | } |
4195 | } | |
c906108c | 4196 | |
c3f6f71d | 4197 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4198 | { |
c3f6f71d | 4199 | if (errno == EBUSY) |
77382aee PA |
4200 | warning (_("resume: target already running. " |
4201 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4202 | else |
4203 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4204 | } |
c3f6f71d | 4205 | } |
c906108c | 4206 | |
77382aee | 4207 | /* Set up to trace signals in the child process. */ |
c906108c | 4208 | |
c3f6f71d | 4209 | static void |
94bedb42 TT |
4210 | procfs_pass_signals (struct target_ops *self, |
4211 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 4212 | { |
37de36c6 | 4213 | gdb_sigset_t signals; |
dfd4cc63 | 4214 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 4215 | int signo; |
c906108c | 4216 | |
2455069d UW |
4217 | prfillset (&signals); |
4218 | ||
4219 | for (signo = 0; signo < NSIG; signo++) | |
4220 | { | |
2ea28649 | 4221 | int target_signo = gdb_signal_from_host (signo); |
2455069d UW |
4222 | if (target_signo < numsigs && pass_signals[target_signo]) |
4223 | gdb_prdelset (&signals, signo); | |
4224 | } | |
4225 | ||
4226 | if (!proc_set_traced_signals (pi, &signals)) | |
4227 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4228 | } |
c906108c | 4229 | |
77382aee | 4230 | /* Print status information about the child process. */ |
c906108c | 4231 | |
c3f6f71d | 4232 | static void |
fba45db2 | 4233 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4234 | { |
181e7f93 | 4235 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4236 | |
a3f17187 | 4237 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4238 | inf->attach_flag? "attached": "child", |
39f77062 | 4239 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4240 | } |
c906108c | 4241 | |
77382aee PA |
4242 | /* Stop the child process asynchronously, as when the gdb user types |
4243 | control-c or presses a "stop" button. Works by sending | |
4244 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4245 | |
c3f6f71d | 4246 | static void |
1eab8a48 | 4247 | procfs_stop (struct target_ops *self, ptid_t ptid) |
c3f6f71d | 4248 | { |
7e1789f5 | 4249 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4250 | } |
4251 | ||
77382aee PA |
4252 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4253 | should only be applied to the real process, not to an LWP, because | |
4254 | of the check for parent-process. If we need this to work for an | |
4255 | LWP, it needs some more logic. */ | |
c906108c | 4256 | |
c3f6f71d | 4257 | static void |
fba45db2 | 4258 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4259 | { |
4260 | int parent_pid; | |
c906108c | 4261 | |
c3f6f71d JM |
4262 | parent_pid = proc_parent_pid (pi); |
4263 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4264 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4265 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4266 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4267 | file for the inferior. */ | |
4268 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4269 | { | |
4270 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4271 | } | |
4272 | #endif | |
4273 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4274 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4275 | to kill the inferior, otherwise it might remain stopped with a | |
4276 | pending SIGKILL. | |
4277 | We do not check the result of the PIOCSSIG, the inferior might have | |
4278 | died already. */ | |
4279 | { | |
37de36c6 | 4280 | gdb_siginfo_t newsiginfo; |
c906108c | 4281 | |
c3f6f71d JM |
4282 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4283 | newsiginfo.si_signo = SIGKILL; | |
4284 | newsiginfo.si_code = 0; | |
4285 | newsiginfo.si_errno = 0; | |
4286 | newsiginfo.si_pid = getpid (); | |
4287 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4288 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4289 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4290 | } | |
4291 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4292 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4293 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4294 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4295 | destroy_procinfo (pi); | |
c906108c | 4296 | |
c3f6f71d JM |
4297 | /* If pi is GDB's child, wait for it to die. */ |
4298 | if (parent_pid == getpid ()) | |
19958708 | 4299 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4300 | Should we check the returned event? */ |
4301 | { | |
0d06e24b | 4302 | #if 0 |
c3f6f71d | 4303 | int status, ret; |
c906108c | 4304 | |
c3f6f71d JM |
4305 | ret = waitpid (pi->pid, &status, 0); |
4306 | #else | |
4307 | wait (NULL); | |
4308 | #endif | |
4309 | } | |
4310 | } | |
c906108c | 4311 | |
77382aee PA |
4312 | /* We're done debugging it, and we want it to go away. Then we want |
4313 | GDB to forget all about it. */ | |
c906108c | 4314 | |
19958708 | 4315 | static void |
7d85a9c0 | 4316 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4317 | { |
39f77062 | 4318 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4319 | { |
0df8b418 | 4320 | /* Find procinfo for main process. */ |
dfd4cc63 | 4321 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 4322 | |
c3f6f71d JM |
4323 | if (pi) |
4324 | unconditionally_kill_inferior (pi); | |
4325 | target_mourn_inferior (); | |
c906108c | 4326 | } |
c3f6f71d JM |
4327 | } |
4328 | ||
77382aee | 4329 | /* Forget we ever debugged this thing! */ |
c906108c | 4330 | |
19958708 | 4331 | static void |
136d6dae | 4332 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4333 | { |
4334 | procinfo *pi; | |
c906108c | 4335 | |
39f77062 | 4336 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4337 | { |
0df8b418 | 4338 | /* Find procinfo for main process. */ |
dfd4cc63 | 4339 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4340 | if (pi) |
4341 | destroy_procinfo (pi); | |
c906108c | 4342 | } |
6a3cb8e8 PA |
4343 | |
4344 | generic_mourn_inferior (); | |
8181d85f DJ |
4345 | |
4346 | if (dbx_link_bpt != NULL) | |
4347 | { | |
f5656ead | 4348 | deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt); |
8181d85f DJ |
4349 | dbx_link_bpt_addr = 0; |
4350 | dbx_link_bpt = NULL; | |
4351 | } | |
4352 | ||
6a3cb8e8 | 4353 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 4354 | } |
c906108c | 4355 | |
77382aee PA |
4356 | /* When GDB forks to create a runnable inferior process, this function |
4357 | is called on the parent side of the fork. It's job is to do | |
4358 | whatever is necessary to make the child ready to be debugged, and | |
4359 | then wait for the child to synchronize. */ | |
c906108c | 4360 | |
19958708 | 4361 | static void |
28439f5e | 4362 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4363 | { |
4364 | procinfo *pi; | |
37de36c6 | 4365 | gdb_sigset_t signals; |
c3f6f71d | 4366 | int fail; |
2689673f | 4367 | int lwpid; |
c906108c | 4368 | |
c3f6f71d JM |
4369 | /* This routine called on the parent side (GDB side) |
4370 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
4371 | if (!target_is_pushed (ops)) |
4372 | push_target (ops); | |
c906108c | 4373 | |
c3f6f71d | 4374 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4375 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4376 | |
4377 | if (!open_procinfo_files (pi, FD_CTL)) | |
4378 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4379 | ||
4380 | /* | |
4381 | xmalloc // done | |
4382 | open_procinfo_files // done | |
4383 | link list // done | |
4384 | prfillset (trace) | |
4385 | procfs_notice_signals | |
4386 | prfillset (fault) | |
4387 | prdelset (FLTPAGE) | |
4388 | PIOCWSTOP | |
4389 | PIOCSFAULT | |
4390 | */ | |
4391 | ||
77382aee | 4392 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4393 | if (!(proc_flags (pi) & PR_STOPPED) && |
4394 | !(proc_wait_for_stop (pi))) | |
4395 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4396 | ||
4397 | /* Save some of the /proc state to be restored if we detach. */ | |
4398 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4399 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4400 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4401 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4402 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4403 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4404 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4405 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4406 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4407 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4408 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4409 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4410 | ||
c3f6f71d JM |
4411 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4412 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4413 | ||
0d06e24b JM |
4414 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4415 | and possibly even turning ON kill-on-last-close at this point. But | |
4416 | I can't make that change without careful testing which I don't have | |
4417 | time to do right now... */ | |
c3f6f71d JM |
4418 | /* Turn on run-on-last-close flag so that the child |
4419 | will die if GDB goes away for some reason. */ | |
4420 | if (!proc_set_run_on_last_close (pi)) | |
4421 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4422 | ||
2689673f PA |
4423 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4424 | lwpid = proc_get_current_thread (pi); | |
4425 | ||
4426 | /* Create a procinfo for the main lwp. */ | |
4427 | create_procinfo (pid, lwpid); | |
4428 | ||
4429 | /* We already have a main thread registered in the thread table at | |
4430 | this point, but it didn't have any lwp info yet. Notify the core | |
4431 | about it. This changes inferior_ptid as well. */ | |
4432 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 4433 | ptid_build (pid, lwpid, 0)); |
c906108c | 4434 | |
c3f6f71d | 4435 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4436 | |
4437 | #ifdef SYS_syssgi | |
4438 | /* On mips-irix, we need to stop the inferior early enough during | |
4439 | the startup phase in order to be able to load the shared library | |
4440 | symbols and insert the breakpoints that are located in these shared | |
4441 | libraries. Stopping at the program entry point is not good enough | |
4442 | because the -init code is executed before the execution reaches | |
4443 | that point. | |
4444 | ||
4445 | So what we need to do is to insert a breakpoint in the runtime | |
4446 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4447 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4448 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4449 | as rld is not part of the executable we are running, and thus we need |
4450 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4451 | |
9185ddce JB |
4452 | For this, we trace all syssgi() syscall exit events. Each time |
4453 | we detect such an event, we iterate over each text memory maps, | |
4454 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4455 | When found, we know that rld has been mapped, and that we can insert | |
4456 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4457 | has been inserted, the syssgi() notifications are no longer necessary, | |
4458 | so they should be canceled. */ | |
4459 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4460 | #endif |
c3f6f71d | 4461 | } |
c906108c | 4462 | |
77382aee PA |
4463 | /* When GDB forks to create a new process, this function is called on |
4464 | the child side of the fork before GDB exec's the user program. Its | |
4465 | job is to make the child minimally debuggable, so that the parent | |
4466 | GDB process can connect to the child and take over. This function | |
4467 | should do only the minimum to make that possible, and to | |
4468 | synchronize with the parent process. The parent process should | |
4469 | take care of the details. */ | |
c3f6f71d JM |
4470 | |
4471 | static void | |
fba45db2 | 4472 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4473 | { |
4474 | /* This routine called on the child side (inferior side) | |
4475 | after GDB forks the inferior. It must use only local variables, | |
4476 | because it may be sharing data space with its parent. */ | |
c906108c | 4477 | |
c3f6f71d | 4478 | procinfo *pi; |
37de36c6 | 4479 | sysset_t *exitset; |
c906108c | 4480 | |
c3f6f71d | 4481 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4482 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4483 | |
c3f6f71d JM |
4484 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4485 | { | |
4486 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4487 | gdb_flush (gdb_stderr); | |
77382aee PA |
4488 | /* No need to call "dead_procinfo", because we're going to |
4489 | exit. */ | |
c3f6f71d JM |
4490 | _exit (127); |
4491 | } | |
c906108c | 4492 | |
c3f6f71d JM |
4493 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4494 | /* OSF method for tracing exec syscalls. Quoting: | |
4495 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4496 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4497 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4498 | { |
4499 | int prfs_flags; | |
c906108c | 4500 | |
c3f6f71d JM |
4501 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4502 | { | |
4503 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4504 | gdb_flush (gdb_stderr); | |
4505 | _exit (127); | |
4506 | } | |
4507 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4508 | |
c3f6f71d JM |
4509 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4510 | { | |
4511 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4512 | gdb_flush (gdb_stderr); | |
4513 | _exit (127); | |
4514 | } | |
4515 | } | |
4516 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4517 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4518 | /* GW: Rationale... |
4519 | Not all systems with /proc have all the exec* syscalls with the same | |
4520 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4521 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4522 | |
37de36c6 KB |
4523 | exitset = sysset_t_alloc (pi); |
4524 | gdb_premptysysset (exitset); | |
c3f6f71d | 4525 | #ifdef SYS_exec |
37de36c6 | 4526 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4527 | #endif |
4528 | #ifdef SYS_execve | |
37de36c6 | 4529 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4530 | #endif |
4531 | #ifdef SYS_execv | |
37de36c6 | 4532 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4533 | #endif |
37de36c6 KB |
4534 | #ifdef DYNAMIC_SYSCALLS |
4535 | { | |
4536 | int callnum = find_syscall (pi, "execve"); | |
4537 | ||
4538 | if (callnum >= 0) | |
4539 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4540 | |
37de36c6 KB |
4541 | callnum = find_syscall (pi, "ra_execve"); |
4542 | if (callnum >= 0) | |
4543 | gdb_praddsysset (exitset, callnum); | |
4544 | } | |
4545 | #endif /* DYNAMIC_SYSCALLS */ | |
4546 | ||
4547 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4548 | { |
c3f6f71d JM |
4549 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4550 | gdb_flush (gdb_stderr); | |
4551 | _exit (127); | |
c906108c | 4552 | } |
c3f6f71d JM |
4553 | #endif /* PRFS_STOPEXEC */ |
4554 | ||
0df8b418 | 4555 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4556 | /* Turn off inherit on fork flag so that all grand-children |
4557 | of gdb start with tracing flags cleared. */ | |
4558 | if (!proc_unset_inherit_on_fork (pi)) | |
4559 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4560 | ||
4561 | /* Turn off run on last close flag, so that the child process | |
4562 | cannot run away just because we close our handle on it. | |
4563 | We want it to wait for the parent to attach. */ | |
4564 | if (!proc_unset_run_on_last_close (pi)) | |
4565 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4566 | ||
19958708 | 4567 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4568 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4569 | /*destroy_procinfo (pi);*/ |
c906108c | 4570 | } |
c906108c | 4571 | |
77382aee PA |
4572 | /* This function is called BEFORE gdb forks the inferior process. Its |
4573 | only real responsibility is to set things up for the fork, and tell | |
4574 | GDB which two functions to call after the fork (one for the parent, | |
4575 | and one for the child). | |
4576 | ||
4577 | This function does a complicated search for a unix shell program, | |
4578 | which it then uses to parse arguments and environment variables to | |
4579 | be sent to the child. I wonder whether this code could not be | |
4580 | abstracted out and shared with other unix targets such as | |
4581 | inf-ptrace? */ | |
c906108c SS |
4582 | |
4583 | static void | |
136d6dae VP |
4584 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4585 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4586 | { |
4587 | char *shell_file = getenv ("SHELL"); | |
4588 | char *tryname; | |
28439f5e PA |
4589 | int pid; |
4590 | ||
c906108c SS |
4591 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4592 | { | |
4593 | ||
4594 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4595 | just do this the normal way (via execlp, which operates by |
4596 | attempting an exec for each element of the PATH until it | |
4597 | finds one which succeeds), then there will be an exec for | |
4598 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4599 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4600 | for these failed execs with the ones for successful execs | |
4601 | (whether the exec has succeeded is stored at that time in the | |
4602 | carry bit or some such architecture-specific and | |
4603 | non-ABI-specified place). | |
4604 | ||
4605 | So I can't think of anything better than to search the PATH | |
4606 | now. This has several disadvantages: (1) There is a race | |
4607 | condition; if we find a file now and it is deleted before we | |
4608 | exec it, we lose, even if the deletion leaves a valid file | |
4609 | further down in the PATH, (2) there is no way to know exactly | |
4610 | what an executable (in the sense of "capable of being | |
4611 | exec'd") file is. Using access() loses because it may lose | |
4612 | if the caller is the superuser; failing to use it loses if | |
4613 | there are ACLs or some such. */ | |
c906108c SS |
4614 | |
4615 | char *p; | |
4616 | char *p1; | |
4617 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4618 | path is used from within GDB. */ |
c906108c SS |
4619 | char *path = getenv ("PATH"); |
4620 | int len; | |
4621 | struct stat statbuf; | |
4622 | ||
4623 | if (path == NULL) | |
4624 | path = "/bin:/usr/bin"; | |
4625 | ||
4626 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4627 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4628 | { |
4629 | p1 = strchr (p, ':'); | |
4630 | if (p1 != NULL) | |
4631 | len = p1 - p; | |
4632 | else | |
4633 | len = strlen (p); | |
4634 | strncpy (tryname, p, len); | |
4635 | tryname[len] = '\0'; | |
4636 | strcat (tryname, "/"); | |
4637 | strcat (tryname, shell_file); | |
4638 | if (access (tryname, X_OK) < 0) | |
4639 | continue; | |
4640 | if (stat (tryname, &statbuf) < 0) | |
4641 | continue; | |
4642 | if (!S_ISREG (statbuf.st_mode)) | |
4643 | /* We certainly need to reject directories. I'm not quite | |
4644 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4645 | that people want to exec() these things. */ | |
4646 | continue; | |
4647 | break; | |
4648 | } | |
4649 | if (p == NULL) | |
4650 | /* Not found. This must be an error rather than merely passing | |
4651 | the file to execlp(), because execlp() would try all the | |
4652 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4653 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4654 | __LINE__, shell_file); |
c906108c SS |
4655 | |
4656 | shell_file = tryname; | |
4657 | } | |
4658 | ||
28439f5e | 4659 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4660 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4661 | |
4662 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4663 | } |
4664 | ||
4665 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4666 | |
27087a3d JB |
4667 | static void |
4668 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4669 | { | |
9185ddce | 4670 | #ifdef SYS_syssgi |
77382aee | 4671 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4672 | They should normally have been removed by now, but they may still |
4673 | be activated if the inferior doesn't use shared libraries, or if | |
4674 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4675 | See procfs_init_inferior() for more details. |
4676 | ||
4677 | Since these notifications are only ever enabled when we spawned | |
4678 | the inferior ourselves, there is nothing to do when the inferior | |
4679 | was created by attaching to an already running process, or when | |
4680 | debugging a core file. */ | |
4681 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4682 | return; | |
4683 | ||
dfd4cc63 LM |
4684 | proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
4685 | 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
9185ddce | 4686 | #endif |
c906108c SS |
4687 | } |
4688 | ||
77382aee | 4689 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4690 | |
c3f6f71d | 4691 | static int |
fba45db2 | 4692 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4693 | { |
dfd4cc63 | 4694 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 4695 | |
2689673f | 4696 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4697 | add_thread (gdb_threadid); |
c906108c | 4698 | |
c3f6f71d JM |
4699 | return 0; |
4700 | } | |
4701 | ||
77382aee PA |
4702 | /* Query all the threads that the target knows about, and give them |
4703 | back to GDB to add to its list. */ | |
c3f6f71d | 4704 | |
d3581e61 | 4705 | static void |
28439f5e | 4706 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4707 | { |
4708 | procinfo *pi; | |
4709 | ||
0df8b418 | 4710 | /* Find procinfo for main process. */ |
dfd4cc63 | 4711 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4712 | proc_update_threads (pi); |
4713 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4714 | } |
4715 | ||
77382aee PA |
4716 | /* Return true if the thread is still 'alive'. This guy doesn't |
4717 | really seem to be doing his job. Got to investigate how to tell | |
4718 | when a thread is really gone. */ | |
c906108c | 4719 | |
c906108c | 4720 | static int |
28439f5e | 4721 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4722 | { |
c3f6f71d JM |
4723 | int proc, thread; |
4724 | procinfo *pi; | |
c906108c | 4725 | |
dfd4cc63 LM |
4726 | proc = ptid_get_pid (ptid); |
4727 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 4728 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4729 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4730 | return 0; | |
4731 | ||
4732 | /* If I can't get its status, it ain't alive! | |
4733 | What's more, I need to forget about it! */ | |
4734 | if (!proc_get_status (pi)) | |
4735 | { | |
4736 | destroy_procinfo (pi); | |
4737 | return 0; | |
4738 | } | |
77382aee PA |
4739 | /* I couldn't have got its status if it weren't alive, so it's |
4740 | alive. */ | |
c3f6f71d | 4741 | return 1; |
c906108c | 4742 | } |
c3f6f71d | 4743 | |
77382aee PA |
4744 | /* Convert PTID to a string. Returns the string in a static |
4745 | buffer. */ | |
c3f6f71d | 4746 | |
d3581e61 | 4747 | static char * |
117de6a9 | 4748 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
4749 | { |
4750 | static char buf[80]; | |
c3f6f71d | 4751 | |
dfd4cc63 LM |
4752 | if (ptid_get_lwp (ptid) == 0) |
4753 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 4754 | else |
dfd4cc63 | 4755 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
4756 | |
4757 | return buf; | |
c3f6f71d JM |
4758 | } |
4759 | ||
77382aee | 4760 | /* Insert a watchpoint. */ |
c3f6f71d | 4761 | |
a0911fd0 | 4762 | static int |
39f77062 | 4763 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 4764 | int after) |
c906108c | 4765 | { |
37de36c6 | 4766 | #ifndef AIX5 |
c3f6f71d | 4767 | int pflags = 0; |
19958708 | 4768 | procinfo *pi; |
c3f6f71d | 4769 | |
dfd4cc63 LM |
4770 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
4771 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
4772 | 0); | |
c3f6f71d | 4773 | |
0df8b418 MS |
4774 | /* Translate from GDB's flags to /proc's. */ |
4775 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 4776 | { |
0df8b418 | 4777 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
4778 | case hw_write: /* default watchpoint (write) */ |
4779 | pflags = WRITE_WATCHFLAG; | |
4780 | break; | |
4781 | case hw_read: /* read watchpoint */ | |
4782 | pflags = READ_WATCHFLAG; | |
4783 | break; | |
4784 | case hw_access: /* access watchpoint */ | |
4785 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4786 | break; | |
4787 | case hw_execute: /* execution HW breakpoint */ | |
4788 | pflags = EXEC_WATCHFLAG; | |
4789 | break; | |
0df8b418 | 4790 | default: /* Something weird. Return error. */ |
c906108c | 4791 | return -1; |
c3f6f71d | 4792 | } |
0df8b418 | 4793 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
4794 | pflags |= AFTER_WATCHFLAG; |
4795 | } | |
4796 | ||
4797 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4798 | { | |
0df8b418 | 4799 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
4800 | return -1; /* fail */ |
4801 | /* GDB may try to remove the same watchpoint twice. | |
4802 | If a remove request returns no match, don't error. */ | |
c906108c | 4803 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4804 | return 0; /* ignore */ |
4805 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4806 | } |
37de36c6 | 4807 | #endif /* AIX5 */ |
c906108c SS |
4808 | return 0; |
4809 | } | |
4810 | ||
1e03ad20 KB |
4811 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
4812 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
4813 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
4814 | far. | |
19958708 | 4815 | |
1e03ad20 KB |
4816 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
4817 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 4818 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
4819 | |
4820 | static int | |
5461485a TT |
4821 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
4822 | int type, int cnt, int othertype) | |
1e03ad20 | 4823 | { |
1e03ad20 KB |
4824 | /* Due to the way that proc_set_watchpoint() is implemented, host |
4825 | and target pointers must be of the same size. If they are not, | |
4826 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
4827 | fact that proc_set_watchpoint() calls |
4828 | procfs_address_to_host_pointer(); a close inspection of | |
4829 | procfs_address_to_host_pointer will reveal that an internal error | |
4830 | will be generated when the host and target pointer sizes are | |
4831 | different. */ | |
f5656ead | 4832 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 4833 | |
4e906f53 | 4834 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
4835 | return 0; |
4836 | ||
4837 | /* Other tests here??? */ | |
4838 | ||
4839 | return 1; | |
1e03ad20 KB |
4840 | } |
4841 | ||
77382aee PA |
4842 | /* Returns non-zero if process is stopped on a hardware watchpoint |
4843 | fault, else returns zero. */ | |
c3f6f71d | 4844 | |
25513619 | 4845 | static int |
6a109b6b | 4846 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 4847 | { |
c3f6f71d | 4848 | procinfo *pi; |
c906108c | 4849 | |
dfd4cc63 | 4850 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 4851 | |
c3f6f71d | 4852 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4853 | { |
c3f6f71d | 4854 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 4855 | { |
c906108c | 4856 | #ifdef FLTWATCH |
c3f6f71d JM |
4857 | if (proc_what (pi) == FLTWATCH) |
4858 | return 1; | |
c906108c SS |
4859 | #endif |
4860 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4861 | if (proc_what (pi) == FLTKWATCH) |
4862 | return 1; | |
c906108c | 4863 | #endif |
c3f6f71d | 4864 | } |
c906108c SS |
4865 | } |
4866 | return 0; | |
4867 | } | |
c906108c | 4868 | |
77382aee PA |
4869 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
4870 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
4871 | address. This function is only called if | |
4872 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
4873 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
4874 | |
4875 | static int | |
4876 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
4877 | { | |
4878 | procinfo *pi; | |
4879 | ||
dfd4cc63 | 4880 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
4881 | return proc_watchpoint_address (pi, addr); |
4882 | } | |
4883 | ||
25513619 | 4884 | static int |
7bb99c53 TT |
4885 | procfs_insert_watchpoint (struct target_ops *self, |
4886 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 4887 | struct expression *cond) |
25513619 | 4888 | { |
d92524f1 | 4889 | if (!target_have_steppable_watchpoint |
f5656ead | 4890 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
4891 | { |
4892 | /* When a hardware watchpoint fires off the PC will be left at | |
4893 | the instruction following the one which caused the | |
4894 | watchpoint. It will *NOT* be necessary for GDB to step over | |
4895 | the watchpoint. */ | |
4896 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
4897 | } | |
4898 | else | |
4899 | { | |
4900 | /* When a hardware watchpoint fires off the PC will be left at | |
4901 | the instruction which caused the watchpoint. It will be | |
4902 | necessary for GDB to step over the watchpoint. */ | |
4903 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
4904 | } | |
4905 | } | |
4906 | ||
4907 | static int | |
11b5219a TT |
4908 | procfs_remove_watchpoint (struct target_ops *self, |
4909 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 4910 | struct expression *cond) |
25513619 PA |
4911 | { |
4912 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
4913 | } | |
4914 | ||
4915 | static int | |
31568a15 TT |
4916 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
4917 | CORE_ADDR addr, int len) | |
25513619 PA |
4918 | { |
4919 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
4920 | system can support "thousands" of hardware watchpoints, but gives | |
4921 | no method for finding out how many; It doesn't say anything about | |
4922 | the allowed size for the watched area either. So we just tell | |
4923 | GDB 'yes'. */ | |
4924 | return 1; | |
4925 | } | |
4926 | ||
4927 | void | |
4928 | procfs_use_watchpoints (struct target_ops *t) | |
4929 | { | |
4930 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
4931 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
4932 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
4933 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 4934 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 4935 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
4936 | } |
4937 | ||
77382aee PA |
4938 | /* Memory Mappings Functions: */ |
4939 | ||
4940 | /* Call a callback function once for each mapping, passing it the | |
4941 | mapping, an optional secondary callback function, and some optional | |
4942 | opaque data. Quit and return the first non-zero value returned | |
4943 | from the callback. | |
4944 | ||
4945 | PI is the procinfo struct for the process to be mapped. FUNC is | |
4946 | the callback function to be called by this iterator. DATA is the | |
4947 | optional opaque data to be passed to the callback function. | |
4948 | CHILD_FUNC is the optional secondary function pointer to be passed | |
4949 | to the child function. Returns the first non-zero return value | |
4950 | from the callback function, or zero. */ | |
831e682e MS |
4951 | |
4952 | static int | |
b8edc417 | 4953 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 4954 | void *data, |
19958708 | 4955 | int (*func) (struct prmap *map, |
b8edc417 | 4956 | find_memory_region_ftype child_func, |
831e682e MS |
4957 | void *data)) |
4958 | { | |
4959 | char pathname[MAX_PROC_NAME_SIZE]; | |
4960 | struct prmap *prmaps; | |
4961 | struct prmap *prmap; | |
4962 | int funcstat; | |
4963 | int map_fd; | |
4964 | int nmap; | |
0a86f364 | 4965 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
4966 | #ifdef NEW_PROC_API |
4967 | struct stat sbuf; | |
4968 | #endif | |
4969 | ||
19958708 | 4970 | /* Get the number of mappings, allocate space, |
831e682e MS |
4971 | and read the mappings into prmaps. */ |
4972 | #ifdef NEW_PROC_API | |
0df8b418 | 4973 | /* Open map fd. */ |
831e682e MS |
4974 | sprintf (pathname, "/proc/%d/map", pi->pid); |
4975 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
4976 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
4977 | ||
0df8b418 | 4978 | /* Make sure it gets closed again. */ |
831e682e MS |
4979 | make_cleanup_close (map_fd); |
4980 | ||
19958708 | 4981 | /* Use stat to determine the file size, and compute |
831e682e MS |
4982 | the number of prmap_t objects it contains. */ |
4983 | if (fstat (map_fd, &sbuf) != 0) | |
4984 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
4985 | ||
4986 | nmap = sbuf.st_size / sizeof (prmap_t); | |
4987 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4988 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
4989 | != (nmap * sizeof (*prmaps))) | |
4990 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
4991 | #else | |
4992 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
4993 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
4994 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
4995 | ||
4996 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4997 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
4998 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
4999 | #endif | |
5000 | ||
5001 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5002 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5003 | { |
5004 | do_cleanups (cleanups); | |
5005 | return funcstat; | |
5006 | } | |
831e682e | 5007 | |
0a86f364 | 5008 | do_cleanups (cleanups); |
831e682e MS |
5009 | return 0; |
5010 | } | |
5011 | ||
77382aee | 5012 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5013 | function for each memory region. |
77382aee | 5014 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5015 | |
5016 | static int | |
19958708 | 5017 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5018 | find_memory_region_ftype func, void *data) |
be4d1333 | 5019 | { |
bf75638e | 5020 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5021 | map->pr_size, |
be4d1333 MS |
5022 | (map->pr_mflags & MA_READ) != 0, |
5023 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5024 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 5025 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
5026 | data); |
5027 | } | |
5028 | ||
77382aee PA |
5029 | /* External interface. Calls a callback function once for each |
5030 | mapped memory region in the child process, passing as arguments: | |
5031 | ||
5032 | CORE_ADDR virtual_address, | |
5033 | unsigned long size, | |
5034 | int read, TRUE if region is readable by the child | |
5035 | int write, TRUE if region is writable by the child | |
5036 | int execute TRUE if region is executable by the child. | |
5037 | ||
5038 | Stops iterating and returns the first non-zero value returned by | |
5039 | the callback. */ | |
be4d1333 MS |
5040 | |
5041 | static int | |
2e73927c TT |
5042 | proc_find_memory_regions (struct target_ops *self, |
5043 | find_memory_region_ftype func, void *data) | |
be4d1333 | 5044 | { |
dfd4cc63 | 5045 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5046 | |
19958708 | 5047 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5048 | find_memory_regions_callback); |
5049 | } | |
5050 | ||
77382aee | 5051 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5052 | |
388faa48 | 5053 | static char * |
5ae5f592 | 5054 | mappingflags (long flags) |
388faa48 MS |
5055 | { |
5056 | static char asciiflags[8]; | |
5057 | ||
5058 | strcpy (asciiflags, "-------"); | |
5059 | #if defined (MA_PHYS) | |
5060 | if (flags & MA_PHYS) | |
5061 | asciiflags[0] = 'd'; | |
5062 | #endif | |
5063 | if (flags & MA_STACK) | |
5064 | asciiflags[1] = 's'; | |
5065 | if (flags & MA_BREAK) | |
5066 | asciiflags[2] = 'b'; | |
5067 | if (flags & MA_SHARED) | |
5068 | asciiflags[3] = 's'; | |
5069 | if (flags & MA_READ) | |
5070 | asciiflags[4] = 'r'; | |
5071 | if (flags & MA_WRITE) | |
5072 | asciiflags[5] = 'w'; | |
5073 | if (flags & MA_EXEC) | |
5074 | asciiflags[6] = 'x'; | |
5075 | return (asciiflags); | |
5076 | } | |
5077 | ||
77382aee PA |
5078 | /* Callback function, does the actual work for 'info proc |
5079 | mappings'. */ | |
831e682e | 5080 | |
831e682e | 5081 | static int |
b8edc417 | 5082 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5083 | void *unused) |
831e682e | 5084 | { |
0b62613e | 5085 | unsigned int pr_off; |
831e682e | 5086 | |
831e682e | 5087 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5088 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5089 | #else |
0b62613e | 5090 | pr_off = map->pr_off; |
831e682e | 5091 | #endif |
0b62613e | 5092 | |
f5656ead | 5093 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 5094 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5095 | (unsigned long) map->pr_vaddr, |
5096 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5097 | (unsigned long) map->pr_size, |
0b62613e PA |
5098 | pr_off, |
5099 | mappingflags (map->pr_mflags)); | |
5100 | else | |
f6a96b83 | 5101 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5102 | (unsigned long) map->pr_vaddr, |
5103 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5104 | (unsigned long) map->pr_size, |
0b62613e PA |
5105 | pr_off, |
5106 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5107 | |
5108 | return 0; | |
5109 | } | |
5110 | ||
77382aee | 5111 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5112 | |
5113 | static void | |
5114 | info_proc_mappings (procinfo *pi, int summary) | |
5115 | { | |
388faa48 | 5116 | if (summary) |
0df8b418 | 5117 | return; /* No output for summary mode. */ |
388faa48 | 5118 | |
a3f17187 | 5119 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 5120 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
5121 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5122 | "Start Addr", | |
5123 | " End Addr", | |
5124 | " Size", | |
5125 | " Offset", | |
5126 | "Flags"); | |
5127 | else | |
5128 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5129 | "Start Addr", | |
5130 | " End Addr", | |
5131 | " Size", | |
5132 | " Offset", | |
5133 | "Flags"); | |
388faa48 | 5134 | |
831e682e | 5135 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5136 | printf_filtered ("\n"); |
5137 | } | |
5138 | ||
77382aee | 5139 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5140 | |
5141 | static void | |
7bc112c1 | 5142 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 5143 | enum info_proc_what what) |
c906108c | 5144 | { |
c3f6f71d | 5145 | struct cleanup *old_chain; |
388faa48 MS |
5146 | procinfo *process = NULL; |
5147 | procinfo *thread = NULL; | |
5148 | char **argv = NULL; | |
5149 | char *tmp = NULL; | |
5150 | int pid = 0; | |
5151 | int tid = 0; | |
5152 | int mappings = 0; | |
c906108c | 5153 | |
145b16a9 UW |
5154 | switch (what) |
5155 | { | |
5156 | case IP_MINIMAL: | |
5157 | break; | |
5158 | ||
5159 | case IP_MAPPINGS: | |
5160 | case IP_ALL: | |
5161 | mappings = 1; | |
5162 | break; | |
5163 | ||
5164 | default: | |
5165 | error (_("Not supported on this target.")); | |
5166 | } | |
5167 | ||
c3f6f71d JM |
5168 | old_chain = make_cleanup (null_cleanup, 0); |
5169 | if (args) | |
0fda6bd2 | 5170 | { |
d1a41061 PP |
5171 | argv = gdb_buildargv (args); |
5172 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5173 | } |
c3f6f71d JM |
5174 | while (argv != NULL && *argv != NULL) |
5175 | { | |
5176 | if (isdigit (argv[0][0])) | |
5177 | { | |
5178 | pid = strtoul (argv[0], &tmp, 10); | |
5179 | if (*tmp == '/') | |
5180 | tid = strtoul (++tmp, NULL, 10); | |
5181 | } | |
5182 | else if (argv[0][0] == '/') | |
5183 | { | |
5184 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5185 | } | |
c3f6f71d JM |
5186 | argv++; |
5187 | } | |
5188 | if (pid == 0) | |
dfd4cc63 | 5189 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 5190 | if (pid == 0) |
8a3fe4f8 | 5191 | error (_("No current process: you must name one.")); |
c3f6f71d | 5192 | else |
c906108c | 5193 | { |
c3f6f71d | 5194 | /* Have pid, will travel. |
0df8b418 | 5195 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5196 | process = find_procinfo (pid, 0); |
5197 | if (process == NULL) | |
5198 | { | |
19958708 | 5199 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5200 | remember to close it again when finished. */ |
5201 | process = create_procinfo (pid, 0); | |
004527cb | 5202 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5203 | if (!open_procinfo_files (process, FD_CTL)) |
5204 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5205 | } | |
c906108c | 5206 | } |
c3f6f71d JM |
5207 | if (tid != 0) |
5208 | thread = create_procinfo (pid, tid); | |
5209 | ||
5210 | if (process) | |
5211 | { | |
a3f17187 | 5212 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5213 | proc_prettyprint_flags (proc_flags (process), 1); |
5214 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5215 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5216 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5217 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5218 | proc_get_nthreads (process)); |
5219 | } | |
5220 | if (thread) | |
5221 | { | |
a3f17187 | 5222 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5223 | proc_prettyprint_flags (proc_flags (thread), 1); |
5224 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5225 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5226 | } | |
5227 | ||
388faa48 MS |
5228 | if (mappings) |
5229 | { | |
5230 | info_proc_mappings (process, 0); | |
5231 | } | |
5232 | ||
c3f6f71d | 5233 | do_cleanups (old_chain); |
c906108c SS |
5234 | } |
5235 | ||
9185ddce JB |
5236 | /* Modify the status of the system call identified by SYSCALLNUM in |
5237 | the set of syscalls that are currently traced/debugged. | |
5238 | ||
5239 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5240 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5241 | |
0df8b418 | 5242 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5243 | will be disabled. */ |
5244 | ||
5245 | static void | |
5246 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5247 | int mode, int from_tty) |
9185ddce JB |
5248 | { |
5249 | sysset_t *sysset; | |
77382aee | 5250 | |
9185ddce JB |
5251 | if (entry_or_exit == PR_SYSENTRY) |
5252 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5253 | else | |
5254 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5255 | ||
5256 | if (sysset == NULL) | |
5257 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5258 | ||
5259 | if (mode == FLAG_SET) | |
5260 | gdb_praddsysset (sysset, syscallnum); | |
5261 | else | |
5262 | gdb_prdelsysset (sysset, syscallnum); | |
5263 | ||
5264 | if (entry_or_exit == PR_SYSENTRY) | |
5265 | { | |
5266 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5267 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5268 | } |
5269 | else | |
5270 | { | |
5271 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5272 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5273 | } |
5274 | } | |
5275 | ||
c3f6f71d | 5276 | static void |
fba45db2 | 5277 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5278 | { |
c3f6f71d | 5279 | procinfo *pi; |
c906108c | 5280 | |
dfd4cc63 | 5281 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 5282 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5283 | |
c3f6f71d | 5284 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5285 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5286 | |
dfd4cc63 | 5287 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
5288 | if (isdigit (args[0])) |
5289 | { | |
9185ddce | 5290 | const int syscallnum = atoi (args); |
c906108c | 5291 | |
9185ddce | 5292 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5293 | } |
5294 | } | |
5295 | ||
19958708 | 5296 | static void |
fba45db2 | 5297 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5298 | { |
c3f6f71d JM |
5299 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5300 | } | |
c906108c | 5301 | |
19958708 | 5302 | static void |
fba45db2 | 5303 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5304 | { |
5305 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5306 | } |
c906108c | 5307 | |
19958708 | 5308 | static void |
fba45db2 | 5309 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5310 | { |
5311 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5312 | } | |
5313 | ||
19958708 | 5314 | static void |
fba45db2 | 5315 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5316 | { |
c3f6f71d JM |
5317 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5318 | } | |
c906108c | 5319 | |
c906108c | 5320 | |
a0911fd0 MR |
5321 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5322 | extern void _initialize_procfs (void); | |
5323 | ||
c906108c | 5324 | void |
fba45db2 | 5325 | _initialize_procfs (void) |
c906108c | 5326 | { |
27087a3d JB |
5327 | observer_attach_inferior_created (procfs_inferior_created); |
5328 | ||
19958708 | 5329 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5330 | _("Give a trace of entries into the syscall.")); |
19958708 | 5331 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5332 | _("Give a trace of exits from the syscall.")); |
19958708 | 5333 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5334 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5335 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5336 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5337 | } |
5338 | ||
5339 | /* =================== END, GDB "MODULE" =================== */ | |
5340 | ||
5341 | ||
5342 | ||
77382aee PA |
5343 | /* miscellaneous stubs: */ |
5344 | ||
5345 | /* The following satisfy a few random symbols mostly created by the | |
5346 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5347 | |
77382aee PA |
5348 | /* Return a pid for which we guarantee we will be able to find a |
5349 | 'live' procinfo. */ | |
c3f6f71d | 5350 | |
39f77062 | 5351 | ptid_t |
fba45db2 | 5352 | procfs_first_available (void) |
c3f6f71d | 5353 | { |
39f77062 | 5354 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5355 | } |
be4d1333 MS |
5356 | |
5357 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
05b4bd79 PA |
5358 | #if defined (PIOCOPENLWP) || defined (PCAGENT) |
5359 | /* gcore only implemented on solaris (so far) */ | |
be4d1333 MS |
5360 | |
5361 | static char * | |
19958708 | 5362 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 5363 | char *note_data, int *note_size, |
2ea28649 | 5364 | enum gdb_signal stop_signal) |
be4d1333 | 5365 | { |
594f7785 | 5366 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5367 | gdb_gregset_t gregs; |
5368 | gdb_fpregset_t fpregs; | |
5369 | unsigned long merged_pid; | |
75125405 | 5370 | struct cleanup *old_chain; |
be4d1333 | 5371 | |
dfd4cc63 | 5372 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 5373 | |
75125405 DJ |
5374 | /* This part is the old method for fetching registers. |
5375 | It should be replaced by the newer one using regsets | |
5376 | once it is implemented in this platform: | |
0df8b418 | 5377 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5378 | |
5379 | old_chain = save_inferior_ptid (); | |
5380 | inferior_ptid = ptid; | |
5381 | target_fetch_registers (regcache, -1); | |
5382 | ||
594f7785 | 5383 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5384 | #if defined (NEW_PROC_API) |
65554fef MS |
5385 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5386 | note_data, | |
5387 | note_size, | |
19958708 | 5388 | merged_pid, |
65554fef MS |
5389 | stop_signal, |
5390 | &gregs); | |
5391 | #else | |
be4d1333 | 5392 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5393 | note_data, |
5394 | note_size, | |
19958708 | 5395 | merged_pid, |
be4d1333 | 5396 | stop_signal, |
65554fef MS |
5397 | &gregs); |
5398 | #endif | |
594f7785 | 5399 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5400 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5401 | note_data, | |
5402 | note_size, | |
5403 | &fpregs, | |
5404 | sizeof (fpregs)); | |
75125405 DJ |
5405 | |
5406 | do_cleanups (old_chain); | |
5407 | ||
be4d1333 MS |
5408 | return note_data; |
5409 | } | |
5410 | ||
5411 | struct procfs_corefile_thread_data { | |
5412 | bfd *obfd; | |
5413 | char *note_data; | |
5414 | int *note_size; | |
2ea28649 | 5415 | enum gdb_signal stop_signal; |
be4d1333 MS |
5416 | }; |
5417 | ||
5418 | static int | |
65554fef | 5419 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5420 | { |
5421 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5422 | |
2689673f | 5423 | if (pi != NULL) |
be4d1333 | 5424 | { |
dfd4cc63 | 5425 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 5426 | |
75125405 | 5427 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5428 | args->note_data, |
2020b7ab PA |
5429 | args->note_size, |
5430 | args->stop_signal); | |
be4d1333 MS |
5431 | } |
5432 | return 0; | |
5433 | } | |
5434 | ||
a223f1e7 JB |
5435 | static int |
5436 | find_signalled_thread (struct thread_info *info, void *data) | |
5437 | { | |
a493e3e2 | 5438 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
5439 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5440 | return 1; | |
5441 | ||
5442 | return 0; | |
5443 | } | |
5444 | ||
2ea28649 | 5445 | static enum gdb_signal |
a223f1e7 JB |
5446 | find_stop_signal (void) |
5447 | { | |
5448 | struct thread_info *info = | |
5449 | iterate_over_threads (find_signalled_thread, NULL); | |
5450 | ||
5451 | if (info) | |
16c381f0 | 5452 | return info->suspend.stop_signal; |
a223f1e7 | 5453 | else |
a493e3e2 | 5454 | return GDB_SIGNAL_0; |
a223f1e7 JB |
5455 | } |
5456 | ||
be4d1333 | 5457 | static char * |
fc6691b2 | 5458 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
5459 | { |
5460 | struct cleanup *old_chain; | |
5461 | gdb_gregset_t gregs; | |
5462 | gdb_fpregset_t fpregs; | |
5463 | char fname[16] = {'\0'}; | |
5464 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 5465 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5466 | char *note_data = NULL; |
6dbdc4a3 | 5467 | char *inf_args; |
be4d1333 | 5468 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5469 | gdb_byte *auxv; |
4e73f23d | 5470 | int auxv_len; |
2ea28649 | 5471 | enum gdb_signal stop_signal; |
be4d1333 MS |
5472 | |
5473 | if (get_exec_file (0)) | |
5474 | { | |
9f37bbcc | 5475 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5476 | fname[sizeof (fname) - 1] = 0; |
5477 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5478 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5479 | |
5480 | inf_args = get_inferior_args (); | |
5481 | if (inf_args && *inf_args && | |
5482 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5483 | { |
19958708 | 5484 | strncat (psargs, " ", |
be4d1333 | 5485 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5486 | strncat (psargs, inf_args, |
be4d1333 MS |
5487 | sizeof (psargs) - strlen (psargs)); |
5488 | } | |
5489 | } | |
5490 | ||
19958708 RM |
5491 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5492 | note_data, | |
5493 | note_size, | |
5494 | fname, | |
be4d1333 MS |
5495 | psargs); |
5496 | ||
651c8d2d PA |
5497 | stop_signal = find_stop_signal (); |
5498 | ||
3e3420f6 PA |
5499 | #ifdef NEW_PROC_API |
5500 | fill_gregset (get_current_regcache (), &gregs, -1); | |
5501 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 5502 | ptid_get_pid (inferior_ptid), |
3e3420f6 PA |
5503 | stop_signal, &gregs); |
5504 | #endif | |
5505 | ||
be4d1333 MS |
5506 | thread_args.obfd = obfd; |
5507 | thread_args.note_data = note_data; | |
5508 | thread_args.note_size = note_size; | |
651c8d2d | 5509 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5510 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5511 | &thread_args); | |
2689673f | 5512 | note_data = thread_args.note_data; |
be4d1333 | 5513 | |
13547ab6 DJ |
5514 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5515 | NULL, &auxv); | |
4e73f23d RM |
5516 | if (auxv_len > 0) |
5517 | { | |
5518 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5519 | "CORE", NT_AUXV, auxv, auxv_len); | |
5520 | xfree (auxv); | |
5521 | } | |
5522 | ||
be4d1333 MS |
5523 | return note_data; |
5524 | } | |
05b4bd79 | 5525 | #else /* !Solaris */ |
65554fef | 5526 | static char * |
fc6691b2 | 5527 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
65554fef | 5528 | { |
8a3fe4f8 | 5529 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5530 | return NULL; /* lint */ |
5531 | } | |
05b4bd79 | 5532 | #endif /* Solaris */ |
be4d1333 | 5533 | /* =================== END GCORE .NOTE "MODULE" =================== */ |