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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
0b302171 | 3 | Copyright (C) 1999-2003, 2006-2012 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "gdbcore.h" | |
65554fef | 27 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 28 | #include "gdbcmd.h" |
0fda6bd2 | 29 | #include "gdbthread.h" |
7f7fe91e | 30 | #include "regcache.h" |
28439f5e | 31 | #include "inf-child.h" |
c906108c | 32 | |
c3f6f71d | 33 | #if defined (NEW_PROC_API) |
0df8b418 | 34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 35 | #endif |
c906108c | 36 | |
c3f6f71d | 37 | #include <sys/procfs.h> |
37de36c6 | 38 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 39 | #include <sys/fault.h> |
37de36c6 KB |
40 | #endif |
41 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 42 | #include <sys/syscall.h> |
37de36c6 | 43 | #endif |
c3f6f71d | 44 | #include <sys/errno.h> |
2555fe1a | 45 | #include "gdb_wait.h" |
0fda6bd2 JM |
46 | #include <signal.h> |
47 | #include <ctype.h> | |
92107356 | 48 | #include "gdb_bfd.h" |
19958708 | 49 | #include "gdb_string.h" |
df8f7274 | 50 | #include "gdb_assert.h" |
44270758 | 51 | #include "inflow.h" |
4e73f23d | 52 | #include "auxv.h" |
d1a7880c | 53 | #include "procfs.h" |
27087a3d | 54 | #include "observer.h" |
0fda6bd2 | 55 | |
77382aee PA |
56 | /* This module provides the interface between GDB and the |
57 | /proc file system, which is used on many versions of Unix | |
58 | as a means for debuggers to control other processes. | |
59 | ||
60 | Examples of the systems that use this interface are: | |
61 | ||
62 | Irix | |
63 | Solaris | |
64 | OSF | |
65 | Unixware | |
66 | AIX5 | |
67 | ||
68 | /proc works by imitating a file system: you open a simulated file | |
69 | that represents the process you wish to interact with, and perform | |
70 | operations on that "file" in order to examine or change the state | |
71 | of the other process. | |
72 | ||
73 | The most important thing to know about /proc and this module is | |
74 | that there are two very different interfaces to /proc: | |
75 | ||
76 | One that uses the ioctl system call, and another that uses read | |
77 | and write system calls. | |
78 | ||
79 | This module has to support both /proc interfaces. This means that | |
80 | there are two different ways of doing every basic operation. | |
81 | ||
82 | In order to keep most of the code simple and clean, I have defined | |
83 | an interface "layer" which hides all these system calls. An ifdef | |
84 | (NEW_PROC_API) determines which interface we are using, and most or | |
85 | all occurrances of this ifdef should be confined to this interface | |
86 | layer. */ | |
87 | ||
88 | /* Determine which /proc API we are using: The ioctl API defines | |
89 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 90 | |
c3f6f71d | 91 | #ifdef NEW_PROC_API |
c906108c | 92 | #include <sys/types.h> |
4b14d3e4 | 93 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 94 | #endif |
c906108c | 95 | |
c3f6f71d JM |
96 | #include <fcntl.h> /* for O_RDONLY */ |
97 | #include <unistd.h> /* for "X_OK" */ | |
98 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 99 | |
103b3ef5 MS |
100 | /* Note: procfs-utils.h must be included after the above system header |
101 | files, because it redefines various system calls using macros. | |
102 | This may be incompatible with the prototype declarations. */ | |
103 | ||
103b3ef5 MS |
104 | #include "proc-utils.h" |
105 | ||
77382aee | 106 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
107 | #include "gregset.h" |
108 | ||
c3f6f71d | 109 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 110 | |
77382aee | 111 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 112 | |
136d6dae VP |
113 | static void procfs_attach (struct target_ops *, char *, int); |
114 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e | 115 | static void procfs_resume (struct target_ops *, |
2ea28649 | 116 | ptid_t, int, enum gdb_signal); |
f9c72d52 | 117 | static void procfs_stop (ptid_t); |
a14ed312 | 118 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
119 | static void procfs_fetch_registers (struct target_ops *, |
120 | struct regcache *, int); | |
121 | static void procfs_store_registers (struct target_ops *, | |
122 | struct regcache *, int); | |
13bdd2e7 | 123 | static void procfs_pass_signals (int, unsigned char *); |
7d85a9c0 | 124 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 125 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 126 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 127 | char *, char **, int); |
117de6a9 | 128 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 129 | ptid_t, struct target_waitstatus *, int); |
0b62613e | 130 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
131 | struct mem_attrib *attrib, |
132 | struct target_ops *); | |
4e73f23d RM |
133 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
134 | enum target_object object, | |
135 | const char *annex, | |
3e43a32a MS |
136 | gdb_byte *readbuf, |
137 | const gdb_byte *writebuf, | |
4e73f23d | 138 | ULONGEST offset, LONGEST len); |
a14ed312 | 139 | |
28439f5e | 140 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 141 | |
d3581e61 JB |
142 | static void procfs_find_new_threads (struct target_ops *ops); |
143 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); | |
c3f6f71d | 144 | |
1a04d88f | 145 | static int proc_find_memory_regions (find_memory_region_ftype, void *); |
be4d1333 MS |
146 | |
147 | static char * procfs_make_note_section (bfd *, int *); | |
148 | ||
1e03ad20 KB |
149 | static int procfs_can_use_hw_breakpoint (int, int, int); |
150 | ||
145b16a9 UW |
151 | static void procfs_info_proc (struct target_ops *, char *, |
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 | { |
e17a4113 | 162 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); |
c47ffbe3 VP |
163 | gdb_byte *ptr = *readptr; |
164 | ||
165 | if (endptr == ptr) | |
166 | return 0; | |
77382aee | 167 | |
c47ffbe3 VP |
168 | if (endptr - ptr < 8 * 2) |
169 | return -1; | |
170 | ||
e17a4113 | 171 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
172 | ptr += 8; |
173 | /* The size of data is always 64-bit. If the application is 32-bit, | |
174 | it will be zero extended, as expected. */ | |
e17a4113 | 175 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
176 | ptr += 8; |
177 | ||
178 | *readptr = ptr; | |
179 | return 1; | |
180 | } | |
181 | #endif | |
182 | ||
d1a7880c | 183 | struct target_ops * |
28439f5e | 184 | procfs_target (void) |
c3f6f71d | 185 | { |
28439f5e PA |
186 | struct target_ops *t = inf_child_target (); |
187 | ||
77382aee PA |
188 | t->to_shortname = "procfs"; |
189 | t->to_longname = "Unix /proc child process"; | |
190 | t->to_doc = | |
c3f6f71d | 191 | "Unix /proc child process (started by the \"run\" command)."; |
77382aee PA |
192 | t->to_create_inferior = procfs_create_inferior; |
193 | t->to_kill = procfs_kill_inferior; | |
194 | t->to_mourn_inferior = procfs_mourn_inferior; | |
195 | t->to_attach = procfs_attach; | |
196 | t->to_detach = procfs_detach; | |
197 | t->to_wait = procfs_wait; | |
198 | t->to_resume = procfs_resume; | |
199 | t->to_fetch_registers = procfs_fetch_registers; | |
200 | t->to_store_registers = procfs_store_registers; | |
201 | t->to_xfer_partial = procfs_xfer_partial; | |
28439f5e | 202 | t->deprecated_xfer_memory = procfs_xfer_memory; |
2455069d | 203 | t->to_pass_signals = procfs_pass_signals; |
77382aee PA |
204 | t->to_files_info = procfs_files_info; |
205 | t->to_stop = procfs_stop; | |
28439f5e | 206 | |
77382aee PA |
207 | t->to_find_new_threads = procfs_find_new_threads; |
208 | t->to_thread_alive = procfs_thread_alive; | |
209 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 210 | |
77382aee | 211 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
212 | t->to_find_memory_regions = proc_find_memory_regions; |
213 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 214 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
215 | |
216 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 217 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
218 | #endif |
219 | ||
77382aee | 220 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
221 | |
222 | return t; | |
c3f6f71d | 223 | } |
c906108c | 224 | |
c3f6f71d JM |
225 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
226 | ||
77382aee PA |
227 | /* World Unification: |
228 | ||
229 | Put any typedefs, defines etc. here that are required for the | |
230 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
231 | |
232 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 233 | #ifdef WA_READ |
19958708 | 234 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
235 | WRITE_WATCHFLAG = WA_WRITE, |
236 | EXEC_WATCHFLAG = WA_EXEC, | |
237 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
238 | }; | |
239 | #endif | |
240 | #else /* Irix method for watchpoints */ | |
19958708 | 241 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
242 | WRITE_WATCHFLAG = MA_WRITE, |
243 | EXEC_WATCHFLAG = MA_EXEC, | |
244 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
245 | }; | |
246 | #endif | |
247 | ||
37de36c6 KB |
248 | /* gdb_sigset_t */ |
249 | #ifdef HAVE_PR_SIGSET_T | |
250 | typedef pr_sigset_t gdb_sigset_t; | |
251 | #else | |
252 | typedef sigset_t gdb_sigset_t; | |
253 | #endif | |
254 | ||
255 | /* sigaction */ | |
256 | #ifdef HAVE_PR_SIGACTION64_T | |
257 | typedef pr_sigaction64_t gdb_sigaction_t; | |
258 | #else | |
259 | typedef struct sigaction gdb_sigaction_t; | |
260 | #endif | |
261 | ||
262 | /* siginfo */ | |
263 | #ifdef HAVE_PR_SIGINFO64_T | |
264 | typedef pr_siginfo64_t gdb_siginfo_t; | |
265 | #else | |
a5362b9a | 266 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
267 | #endif |
268 | ||
3c95f01c JB |
269 | /* On mips-irix, praddset and prdelset are defined in such a way that |
270 | they return a value, which causes GCC to emit a -Wunused error | |
271 | because the returned value is not used. Prevent this warning | |
272 | by casting the return value to void. On sparc-solaris, this issue | |
273 | does not exist because the definition of these macros already include | |
274 | that cast to void. */ | |
275 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
276 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
277 | ||
37de36c6 KB |
278 | /* gdb_premptysysset */ |
279 | #ifdef premptysysset | |
280 | #define gdb_premptysysset premptysysset | |
281 | #else | |
282 | #define gdb_premptysysset premptyset | |
283 | #endif | |
284 | ||
285 | /* praddsysset */ | |
286 | #ifdef praddsysset | |
287 | #define gdb_praddsysset praddsysset | |
288 | #else | |
3c95f01c | 289 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
290 | #endif |
291 | ||
292 | /* prdelsysset */ | |
293 | #ifdef prdelsysset | |
294 | #define gdb_prdelsysset prdelsysset | |
295 | #else | |
3c95f01c | 296 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
297 | #endif |
298 | ||
299 | /* prissyssetmember */ | |
300 | #ifdef prissyssetmember | |
301 | #define gdb_pr_issyssetmember prissyssetmember | |
302 | #else | |
303 | #define gdb_pr_issyssetmember prismember | |
304 | #endif | |
305 | ||
306 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
307 | as intuitively descriptive as it could be, so we'll define | |
308 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
309 | this writing, this feature is only found on AIX5 systems and | |
310 | basically means that the set of syscalls is not fixed. I.e, | |
311 | there's no nice table that one can #include to get all of the | |
312 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
313 | for each process. We are at least guaranteed that they won't | |
314 | change over the lifetime of the process. But each process could | |
77382aee | 315 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
316 | #ifdef HAVE_PRSYSENT_T |
317 | #define DYNAMIC_SYSCALLS | |
318 | #endif | |
c3f6f71d JM |
319 | |
320 | ||
321 | ||
322 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
323 | ||
324 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
325 | ||
326 | /* The procinfo struct is a wrapper to hold all the state information | |
327 | concerning a /proc process. There should be exactly one procinfo | |
328 | for each process, and since GDB currently can debug only one | |
329 | process at a time, that means there should be only one procinfo. | |
330 | All of the LWP's of a process can be accessed indirectly thru the | |
331 | single process procinfo. | |
332 | ||
333 | However, against the day when GDB may debug more than one process, | |
334 | this data structure is kept in a list (which for now will hold no | |
335 | more than one member), and many functions will have a pointer to a | |
336 | procinfo as an argument. | |
337 | ||
338 | There will be a separate procinfo structure for use by the (not yet | |
339 | implemented) "info proc" command, so that we can print useful | |
340 | information about any random process without interfering with the | |
0df8b418 | 341 | inferior's procinfo information. */ |
c3f6f71d JM |
342 | |
343 | #ifdef NEW_PROC_API | |
344 | /* format strings for /proc paths */ | |
345 | # ifndef CTL_PROC_NAME_FMT | |
346 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
347 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
348 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
349 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
350 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
351 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
352 | # endif | |
353 | /* the name of the proc status struct depends on the implementation */ | |
354 | typedef pstatus_t gdb_prstatus_t; | |
355 | typedef lwpstatus_t gdb_lwpstatus_t; | |
356 | #else /* ! NEW_PROC_API */ | |
357 | /* format strings for /proc paths */ | |
358 | # ifndef CTL_PROC_NAME_FMT | |
359 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
360 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
361 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
362 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
363 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
364 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
365 | # endif | |
0df8b418 | 366 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 367 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
368 | typedef prstatus_t gdb_lwpstatus_t; |
369 | #endif /* NEW_PROC_API */ | |
c906108c | 370 | |
c3f6f71d JM |
371 | typedef struct procinfo { |
372 | struct procinfo *next; | |
373 | int pid; /* Process ID */ | |
374 | int tid; /* Thread/LWP id */ | |
c906108c | 375 | |
c3f6f71d JM |
376 | /* process state */ |
377 | int was_stopped; | |
378 | int ignore_next_sigstop; | |
c906108c | 379 | |
19958708 | 380 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
381 | several different fd's, depending on the version of /proc |
382 | (old ioctl or new read/write). */ | |
c906108c | 383 | |
c3f6f71d | 384 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
385 | |
386 | /* The next three file descriptors are actually only needed in the | |
387 | read/write, multiple-file-descriptor implemenation | |
388 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
389 | code, we will use them uniformly by (in the case of the ioctl | |
390 | single-file-descriptor implementation) filling them with copies | |
391 | of the control fd. */ | |
c3f6f71d JM |
392 | int status_fd; /* File descriptor for /proc status file */ |
393 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 394 | |
c3f6f71d | 395 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 396 | |
c3f6f71d | 397 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
398 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
399 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
400 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
401 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 402 | |
c3f6f71d | 403 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 404 | |
c3f6f71d JM |
405 | #ifndef NEW_PROC_API |
406 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 407 | #endif |
37de36c6 KB |
408 | |
409 | #ifdef DYNAMIC_SYSCALLS | |
410 | int num_syscalls; /* Total number of syscalls */ | |
411 | char **syscall_names; /* Syscall number to name map */ | |
412 | #endif | |
19958708 | 413 | |
c3f6f71d | 414 | struct procinfo *thread_list; |
c906108c | 415 | |
c3f6f71d JM |
416 | int status_valid : 1; |
417 | int gregs_valid : 1; | |
418 | int fpregs_valid : 1; | |
419 | int threads_valid: 1; | |
420 | } procinfo; | |
c906108c | 421 | |
c3f6f71d | 422 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 423 | |
c3f6f71d | 424 | /* Function prototypes for procinfo module: */ |
c906108c | 425 | |
a14ed312 KB |
426 | static procinfo *find_procinfo_or_die (int pid, int tid); |
427 | static procinfo *find_procinfo (int pid, int tid); | |
428 | static procinfo *create_procinfo (int pid, int tid); | |
429 | static void destroy_procinfo (procinfo * p); | |
004527cb | 430 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
431 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
432 | static int open_procinfo_files (procinfo * p, int which); | |
433 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
434 | static int sysset_t_size (procinfo *p); |
435 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
436 | #ifdef DYNAMIC_SYSCALLS | |
437 | static void load_syscalls (procinfo *pi); | |
438 | static void free_syscalls (procinfo *pi); | |
439 | static int find_syscall (procinfo *pi, char *name); | |
440 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 441 | |
e9ef4f39 | 442 | static int iterate_over_mappings |
b8edc417 JK |
443 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
444 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 445 | void *data)); |
e9ef4f39 | 446 | |
c3f6f71d JM |
447 | /* The head of the procinfo list: */ |
448 | static procinfo * procinfo_list; | |
c906108c | 449 | |
77382aee PA |
450 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
451 | not found. */ | |
c906108c | 452 | |
19958708 | 453 | static procinfo * |
fba45db2 | 454 | find_procinfo (int pid, int tid) |
c5aa993b | 455 | { |
c3f6f71d | 456 | procinfo *pi; |
c906108c | 457 | |
c3f6f71d JM |
458 | for (pi = procinfo_list; pi; pi = pi->next) |
459 | if (pi->pid == pid) | |
460 | break; | |
c906108c | 461 | |
c3f6f71d JM |
462 | if (pi) |
463 | if (tid) | |
464 | { | |
465 | /* Don't check threads_valid. If we're updating the | |
466 | thread_list, we want to find whatever threads are already | |
467 | here. This means that in general it is the caller's | |
468 | responsibility to check threads_valid and update before | |
469 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 470 | thread. */ |
c3f6f71d JM |
471 | |
472 | for (pi = pi->thread_list; pi; pi = pi->next) | |
473 | if (pi->tid == tid) | |
474 | break; | |
475 | } | |
c906108c | 476 | |
c3f6f71d JM |
477 | return pi; |
478 | } | |
c906108c | 479 | |
77382aee | 480 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 481 | |
c3f6f71d | 482 | static procinfo * |
fba45db2 | 483 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
484 | { |
485 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 486 | |
c3f6f71d | 487 | if (pi == NULL) |
0fda6bd2 JM |
488 | { |
489 | if (tid) | |
3e43a32a MS |
490 | error (_("procfs: couldn't find pid %d " |
491 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
492 | pid, tid); |
493 | else | |
8a3fe4f8 | 494 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 495 | } |
c3f6f71d JM |
496 | return pi; |
497 | } | |
c906108c | 498 | |
77382aee PA |
499 | /* Wrapper for `open'. The appropriate open call is attempted; if |
500 | unsuccessful, it will be retried as many times as needed for the | |
501 | EAGAIN and EINTR conditions. | |
19958708 | 502 | |
77382aee PA |
503 | For other conditions, retry the open a limited number of times. In |
504 | addition, a short sleep is imposed prior to retrying the open. The | |
505 | reason for this sleep is to give the kernel a chance to catch up | |
506 | and create the file in question in the event that GDB "wins" the | |
507 | race to open a file before the kernel has created it. */ | |
19958708 | 508 | |
4d1bcd09 KB |
509 | static int |
510 | open_with_retry (const char *pathname, int flags) | |
511 | { | |
512 | int retries_remaining, status; | |
513 | ||
514 | retries_remaining = 2; | |
515 | ||
516 | while (1) | |
517 | { | |
518 | status = open (pathname, flags); | |
519 | ||
520 | if (status >= 0 || retries_remaining == 0) | |
521 | break; | |
522 | else if (errno != EINTR && errno != EAGAIN) | |
523 | { | |
524 | retries_remaining--; | |
525 | sleep (1); | |
526 | } | |
527 | } | |
528 | ||
529 | return status; | |
530 | } | |
531 | ||
77382aee PA |
532 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
533 | is defined, we only open the control file descriptor; the others | |
534 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
535 | there is only one real file descriptor, but we keep multiple copies | |
536 | of it so that the code that uses them does not have to be #ifdef'd. | |
537 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 538 | |
c3f6f71d | 539 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 540 | |
c3f6f71d | 541 | static int |
fba45db2 | 542 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 543 | { |
0fda6bd2 | 544 | #ifdef NEW_PROC_API |
c3f6f71d | 545 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 546 | #endif |
c3f6f71d JM |
547 | int fd; |
548 | ||
77382aee PA |
549 | /* This function is getting ALMOST long enough to break up into |
550 | several. Here is some rationale: | |
551 | ||
552 | NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
553 | There are several file descriptors that may need to be open | |
554 | for any given process or LWP. The ones we're intereted in are: | |
555 | - control (ctl) write-only change the state | |
556 | - status (status) read-only query the state | |
557 | - address space (as) read/write access memory | |
558 | - map (map) read-only virtual addr map | |
559 | Most of these are opened lazily as they are needed. | |
560 | The pathnames for the 'files' for an LWP look slightly | |
561 | different from those of a first-class process: | |
562 | Pathnames for a process (<proc-id>): | |
563 | /proc/<proc-id>/ctl | |
564 | /proc/<proc-id>/status | |
565 | /proc/<proc-id>/as | |
566 | /proc/<proc-id>/map | |
567 | Pathnames for an LWP (lwp-id): | |
568 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
569 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
570 | An LWP has no map or address space file descriptor, since | |
571 | the memory map and address space are shared by all LWPs. | |
572 | ||
573 | Everyone else (Solaris 2.5, Irix, OSF) | |
574 | There is only one file descriptor for each process or LWP. | |
575 | For convenience, we copy the same file descriptor into all | |
576 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
577 | as_fd, see NEW_PROC_API above) so that code that uses them | |
578 | doesn't need any #ifdef's. | |
579 | Pathname for all: | |
580 | /proc/<proc-id> | |
581 | ||
582 | Solaris 2.5 LWP's: | |
583 | Each LWP has an independent file descriptor, but these | |
584 | are not obtained via the 'open' system call like the rest: | |
585 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
586 | to the file descriptor of the parent process. | |
587 | ||
588 | OSF threads: | |
589 | These do not even have their own independent file descriptor. | |
590 | All operations are carried out on the file descriptor of the | |
591 | parent process. Therefore we just call open again for each | |
0df8b418 | 592 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
593 | |
594 | #ifdef NEW_PROC_API | |
77382aee PA |
595 | /* In this case, there are several different file descriptors that |
596 | we might be asked to open. The control file descriptor will be | |
597 | opened early, but the others will be opened lazily as they are | |
598 | needed. */ | |
c3f6f71d JM |
599 | |
600 | strcpy (tmp, pi->pathname); | |
0df8b418 | 601 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
602 | case FD_CTL: |
603 | if (pi->tid) | |
604 | strcat (tmp, "/lwpctl"); | |
605 | else | |
606 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 607 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 608 | if (fd < 0) |
c3f6f71d JM |
609 | return 0; /* fail */ |
610 | pi->ctl_fd = fd; | |
611 | break; | |
612 | case FD_AS: | |
613 | if (pi->tid) | |
0df8b418 | 614 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 615 | strcat (tmp, "/as"); |
4d1bcd09 | 616 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 617 | if (fd < 0) |
c3f6f71d JM |
618 | return 0; /* fail */ |
619 | pi->as_fd = fd; | |
620 | break; | |
621 | case FD_STATUS: | |
622 | if (pi->tid) | |
623 | strcat (tmp, "/lwpstatus"); | |
624 | else | |
625 | strcat (tmp, "/status"); | |
4d1bcd09 | 626 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 627 | if (fd < 0) |
c3f6f71d JM |
628 | return 0; /* fail */ |
629 | pi->status_fd = fd; | |
630 | break; | |
631 | default: | |
632 | return 0; /* unknown file descriptor */ | |
633 | } | |
634 | #else /* not NEW_PROC_API */ | |
77382aee PA |
635 | /* In this case, there is only one file descriptor for each procinfo |
636 | (ie. each process or LWP). In fact, only the file descriptor for | |
637 | the process can actually be opened by an 'open' system call. The | |
638 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
639 | process's file descriptor. | |
640 | ||
641 | For convenience, we copy each procinfo's single file descriptor | |
642 | into all of the fields occupied by the several file descriptors | |
643 | of the NEW_PROC_API implementation. That way, the code that uses | |
644 | them can be written without ifdefs. */ | |
c3f6f71d JM |
645 | |
646 | ||
647 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 648 | /* Only one FD; just open it. */ |
e28cade7 | 649 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 650 | return 0; |
0df8b418 | 651 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
652 | if (pi->tid == 0) /* Master procinfo for the process */ |
653 | { | |
4d1bcd09 | 654 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 655 | if (fd < 0) |
c3f6f71d JM |
656 | return 0; /* fail */ |
657 | } | |
658 | else /* LWP thread procinfo */ | |
659 | { | |
660 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
661 | procinfo *process; | |
662 | int lwpid = pi->tid; | |
663 | ||
0df8b418 | 664 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
665 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
666 | return 0; /* fail */ | |
667 | ||
0df8b418 | 668 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 669 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 670 | return 0; /* fail */ |
0df8b418 MS |
671 | #else /* Irix, other? */ |
672 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
673 | #endif /* Sol 2.5 PIOCOPENLWP */ |
674 | } | |
675 | #endif /* OSF PIOCTSTATUS */ | |
676 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
677 | #endif /* NEW_PROC_API */ | |
c906108c | 678 | |
c3f6f71d JM |
679 | return 1; /* success */ |
680 | } | |
c906108c | 681 | |
77382aee PA |
682 | /* Allocate a data structure and link it into the procinfo list. |
683 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
684 | pointer to new procinfo struct. */ | |
c906108c | 685 | |
c3f6f71d | 686 | static procinfo * |
fba45db2 | 687 | create_procinfo (int pid, int tid) |
c3f6f71d | 688 | { |
0b62613e | 689 | procinfo *pi, *parent = NULL; |
c906108c | 690 | |
0d06e24b | 691 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 692 | return pi; /* Already exists, nothing to do. */ |
c906108c | 693 | |
0df8b418 | 694 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
695 | if (tid != 0) |
696 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
697 | create it if it | |
0df8b418 | 698 | doesn't exist yet? */ |
c906108c | 699 | |
c3f6f71d JM |
700 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
701 | memset (pi, 0, sizeof (procinfo)); | |
702 | pi->pid = pid; | |
703 | pi->tid = tid; | |
c906108c | 704 | |
37de36c6 KB |
705 | #ifdef DYNAMIC_SYSCALLS |
706 | load_syscalls (pi); | |
707 | #endif | |
708 | ||
1d5e0602 KB |
709 | pi->saved_entryset = sysset_t_alloc (pi); |
710 | pi->saved_exitset = sysset_t_alloc (pi); | |
711 | ||
c3f6f71d JM |
712 | /* Chain into list. */ |
713 | if (tid == 0) | |
714 | { | |
715 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
716 | pi->next = procinfo_list; | |
717 | procinfo_list = pi; | |
718 | } | |
719 | else | |
720 | { | |
721 | #ifdef NEW_PROC_API | |
722 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
723 | #else | |
724 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
725 | #endif | |
726 | pi->next = parent->thread_list; | |
727 | parent->thread_list = pi; | |
728 | } | |
729 | return pi; | |
730 | } | |
c906108c | 731 | |
77382aee | 732 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 733 | |
c3f6f71d | 734 | static void |
fba45db2 | 735 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
736 | { |
737 | if (pi->ctl_fd > 0) | |
738 | close (pi->ctl_fd); | |
739 | #ifdef NEW_PROC_API | |
740 | if (pi->as_fd > 0) | |
741 | close (pi->as_fd); | |
742 | if (pi->status_fd > 0) | |
743 | close (pi->status_fd); | |
744 | #endif | |
745 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
746 | } | |
c906108c | 747 | |
77382aee | 748 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 749 | |
c3f6f71d | 750 | static void |
fba45db2 | 751 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
752 | { |
753 | procinfo *ptr; | |
754 | ||
77382aee | 755 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
756 | if (pi == *list) |
757 | *list = pi->next; | |
19958708 | 758 | else |
c3f6f71d JM |
759 | for (ptr = *list; ptr; ptr = ptr->next) |
760 | if (ptr->next == pi) | |
761 | { | |
762 | ptr->next = pi->next; | |
763 | break; | |
764 | } | |
7a292a7a | 765 | |
77382aee | 766 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 767 | close_procinfo_files (pi); |
7a292a7a | 768 | |
77382aee | 769 | /* Step three: free the memory. */ |
37de36c6 KB |
770 | #ifdef DYNAMIC_SYSCALLS |
771 | free_syscalls (pi); | |
772 | #endif | |
1d5e0602 KB |
773 | xfree (pi->saved_entryset); |
774 | xfree (pi->saved_exitset); | |
b8c9b27d | 775 | xfree (pi); |
c3f6f71d | 776 | } |
c906108c | 777 | |
c3f6f71d | 778 | static void |
fba45db2 | 779 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
780 | { |
781 | procinfo *tmp; | |
c906108c | 782 | |
0df8b418 | 783 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 784 | { |
0df8b418 | 785 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
786 | destroy_one_procinfo (&tmp->thread_list, pi); |
787 | } | |
0df8b418 | 788 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
789 | { |
790 | /* First destroy the children, if any; */ | |
791 | while (pi->thread_list != NULL) | |
792 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
793 | /* Then destroy the parent. Genocide!!! */ | |
794 | destroy_one_procinfo (&procinfo_list, pi); | |
795 | } | |
796 | } | |
c906108c | 797 | |
004527cb AC |
798 | static void |
799 | do_destroy_procinfo_cleanup (void *pi) | |
800 | { | |
801 | destroy_procinfo (pi); | |
802 | } | |
803 | ||
c3f6f71d | 804 | enum { NOKILL, KILL }; |
c906108c | 805 | |
77382aee PA |
806 | /* To be called on a non_recoverable error for a procinfo. Prints |
807 | error messages, optionally sends a SIGKILL to the process, then | |
808 | destroys the data structure. */ | |
c906108c | 809 | |
c3f6f71d | 810 | static void |
fba45db2 | 811 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
812 | { |
813 | char procfile[80]; | |
c906108c | 814 | |
c3f6f71d JM |
815 | if (pi->pathname) |
816 | { | |
817 | print_sys_errmsg (pi->pathname, errno); | |
818 | } | |
819 | else | |
820 | { | |
821 | sprintf (procfile, "process %d", pi->pid); | |
822 | print_sys_errmsg (procfile, errno); | |
823 | } | |
824 | if (kill_p == KILL) | |
825 | kill (pi->pid, SIGKILL); | |
c906108c | 826 | |
c3f6f71d | 827 | destroy_procinfo (pi); |
0b62613e | 828 | error ("%s", msg); |
c3f6f71d | 829 | } |
c906108c | 830 | |
77382aee PA |
831 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
832 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
833 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
834 | |
835 | static int | |
836 | sysset_t_size (procinfo * pi) | |
837 | { | |
838 | #ifndef DYNAMIC_SYSCALLS | |
839 | return sizeof (sysset_t); | |
840 | #else | |
841 | return sizeof (sysset_t) - sizeof (uint64_t) | |
842 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
843 | / (8 * sizeof (uint64_t))); | |
844 | #endif | |
845 | } | |
846 | ||
77382aee | 847 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
848 | |
849 | static sysset_t * | |
850 | sysset_t_alloc (procinfo * pi) | |
851 | { | |
852 | sysset_t *ret; | |
853 | int size = sysset_t_size (pi); | |
f4a14ae6 | 854 | |
37de36c6 KB |
855 | ret = xmalloc (size); |
856 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
857 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
858 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
859 | #endif |
860 | return ret; | |
861 | } | |
862 | ||
863 | #ifdef DYNAMIC_SYSCALLS | |
864 | ||
77382aee | 865 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
866 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
867 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 868 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
869 | |
870 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
871 | #define MAX_SYSCALLS 65536 | |
872 | ||
873 | static void | |
874 | load_syscalls (procinfo *pi) | |
875 | { | |
876 | char pathname[MAX_PROC_NAME_SIZE]; | |
877 | int sysent_fd; | |
878 | prsysent_t header; | |
879 | prsyscall_t *syscalls; | |
880 | int i, size, maxcall; | |
e28cade7 | 881 | struct cleanup *cleanups; |
37de36c6 KB |
882 | |
883 | pi->num_syscalls = 0; | |
884 | pi->syscall_names = 0; | |
885 | ||
77382aee | 886 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 887 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 888 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
889 | if (sysent_fd < 0) |
890 | { | |
8a3fe4f8 | 891 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 892 | } |
e28cade7 | 893 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
894 | |
895 | size = sizeof header - sizeof (prsyscall_t); | |
896 | if (read (sysent_fd, &header, size) != size) | |
897 | { | |
8a3fe4f8 | 898 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
899 | } |
900 | ||
901 | if (header.pr_nsyscalls == 0) | |
902 | { | |
3e43a32a MS |
903 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
904 | pi->pid); | |
37de36c6 KB |
905 | } |
906 | ||
907 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
908 | syscalls = xmalloc (size); | |
e28cade7 | 909 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
910 | |
911 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 912 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
913 | |
914 | /* Find maximum syscall number. This may not be the same as | |
915 | pr_nsyscalls since that value refers to the number of entries | |
916 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 917 | call numbers may be skipped.) */ |
37de36c6 KB |
918 | |
919 | maxcall = syscalls[0].pr_number; | |
920 | ||
921 | for (i = 1; i < header.pr_nsyscalls; i++) | |
922 | if (syscalls[i].pr_number > maxcall | |
77382aee | 923 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
924 | && syscalls[i].pr_number < MAX_SYSCALLS) |
925 | maxcall = syscalls[i].pr_number; | |
926 | ||
927 | pi->num_syscalls = maxcall+1; | |
928 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
929 | ||
930 | for (i = 0; i < pi->num_syscalls; i++) | |
931 | pi->syscall_names[i] = NULL; | |
932 | ||
77382aee | 933 | /* Read the syscall names in. */ |
37de36c6 KB |
934 | for (i = 0; i < header.pr_nsyscalls; i++) |
935 | { | |
936 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
937 | int nread; | |
938 | int callnum; | |
939 | ||
940 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 941 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
942 | || syscalls[i].pr_nameoff <= 0 |
943 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 944 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
945 | continue; |
946 | ||
947 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
948 | if (nread <= 0) | |
949 | continue; | |
950 | ||
951 | callnum = syscalls[i].pr_number; | |
952 | ||
953 | if (pi->syscall_names[callnum] != NULL) | |
954 | { | |
0df8b418 | 955 | /* FIXME: Generate warning. */ |
37de36c6 KB |
956 | continue; |
957 | } | |
958 | ||
959 | namebuf[nread-1] = '\0'; | |
960 | size = strlen (namebuf) + 1; | |
961 | pi->syscall_names[callnum] = xmalloc (size); | |
962 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
963 | pi->syscall_names[callnum][size-1] = '\0'; | |
964 | } | |
19958708 | 965 | |
e28cade7 | 966 | do_cleanups (cleanups); |
37de36c6 KB |
967 | } |
968 | ||
77382aee | 969 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
970 | structure. */ |
971 | ||
972 | static void | |
973 | free_syscalls (procinfo *pi) | |
974 | { | |
975 | if (pi->syscall_names) | |
976 | { | |
977 | int i; | |
978 | ||
979 | for (i = 0; i < pi->num_syscalls; i++) | |
980 | if (pi->syscall_names[i] != NULL) | |
981 | xfree (pi->syscall_names[i]); | |
982 | ||
983 | xfree (pi->syscall_names); | |
984 | pi->syscall_names = 0; | |
985 | } | |
986 | } | |
987 | ||
77382aee | 988 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 989 | If no match is found, return -1. */ |
19958708 | 990 | |
37de36c6 KB |
991 | static int |
992 | find_syscall (procinfo *pi, char *name) | |
993 | { | |
994 | int i; | |
f4a14ae6 | 995 | |
37de36c6 KB |
996 | for (i = 0; i < pi->num_syscalls; i++) |
997 | { | |
998 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
999 | return i; | |
1000 | } | |
1001 | return -1; | |
1002 | } | |
1003 | #endif | |
1004 | ||
c3f6f71d | 1005 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1006 | |
c3f6f71d | 1007 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1008 | |
77382aee PA |
1009 | /* This "module" is the interface layer between the /proc system API |
1010 | and the gdb target vector functions. This layer consists of access | |
1011 | functions that encapsulate each of the basic operations that we | |
1012 | need to use from the /proc API. | |
1013 | ||
1014 | The main motivation for this layer is to hide the fact that there | |
1015 | are two very different implementations of the /proc API. Rather | |
1016 | than have a bunch of #ifdefs all thru the gdb target vector | |
1017 | functions, we do our best to hide them all in here. */ | |
c906108c | 1018 | |
d3581e61 JB |
1019 | static long proc_flags (procinfo * pi); |
1020 | static int proc_why (procinfo * pi); | |
1021 | static int proc_what (procinfo * pi); | |
1022 | static int proc_set_current_signal (procinfo * pi, int signo); | |
1023 | static int proc_get_current_thread (procinfo * pi); | |
1024 | static int proc_iterate_over_threads | |
1025 | (procinfo * pi, | |
1026 | int (*func) (procinfo *, procinfo *, void *), | |
1027 | void *ptr); | |
1028 | ||
1029 | static void | |
fba45db2 | 1030 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1031 | { |
1032 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1033 | print_sys_errmsg (errmsg, errno); | |
1034 | } | |
c906108c | 1035 | |
d3581e61 | 1036 | static void |
fba45db2 | 1037 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1038 | { |
1039 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1040 | perror_with_name (errmsg); | |
1041 | } | |
c906108c | 1042 | |
77382aee PA |
1043 | /* Updates the status struct in the procinfo. There is a 'valid' |
1044 | flag, to let other functions know when this function needs to be | |
1045 | called (so the status is only read when it is needed). The status | |
1046 | file descriptor is also only opened when it is needed. Returns | |
1047 | non-zero for success, zero for failure. */ | |
c906108c | 1048 | |
d3581e61 | 1049 | static int |
fba45db2 | 1050 | proc_get_status (procinfo *pi) |
c3f6f71d | 1051 | { |
0df8b418 | 1052 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1053 | if (pi->status_fd == 0 && |
1054 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1055 | { | |
1056 | pi->status_valid = 0; | |
1057 | return 0; | |
1058 | } | |
c906108c | 1059 | |
c3f6f71d JM |
1060 | #ifdef NEW_PROC_API |
1061 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1062 | pi->status_valid = 0; /* fail */ | |
1063 | else | |
1064 | { | |
19958708 | 1065 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1066 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1067 | if (pi->tid) |
19958708 RM |
1068 | pi->status_valid = (read (pi->status_fd, |
1069 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1070 | sizeof (lwpstatus_t)) |
1071 | == sizeof (lwpstatus_t)); | |
1072 | else | |
1073 | { | |
19958708 | 1074 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1075 | (char *) &pi->prstatus, |
1076 | sizeof (gdb_prstatus_t)) | |
1077 | == sizeof (gdb_prstatus_t)); | |
1078 | #if 0 /*def UNIXWARE*/ | |
1079 | if (pi->status_valid && | |
1080 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1081 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
0df8b418 | 1082 | /* Unixware peculiarity -- read the damn thing again! */ |
19958708 | 1083 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1084 | (char *) &pi->prstatus, |
1085 | sizeof (gdb_prstatus_t)) | |
1086 | == sizeof (gdb_prstatus_t)); | |
1087 | #endif /* UNIXWARE */ | |
1088 | } | |
1089 | } | |
1090 | #else /* ioctl method */ | |
1091 | #ifdef PIOCTSTATUS /* osf */ | |
1092 | if (pi->tid == 0) /* main process */ | |
1093 | { | |
0df8b418 | 1094 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1095 | pi->status_valid = |
c3f6f71d JM |
1096 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | int win; | |
1101 | struct { | |
1102 | long pr_count; | |
1103 | tid_t pr_error_thread; | |
1104 | struct prstatus status; | |
1105 | } thread_status; | |
1106 | ||
1107 | thread_status.pr_count = 1; | |
1108 | thread_status.status.pr_tid = pi->tid; | |
1109 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1110 | if (win) | |
1111 | { | |
19958708 | 1112 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1113 | sizeof (pi->prstatus)); |
1114 | pi->status_valid = 1; | |
1115 | } | |
1116 | } | |
1117 | #else | |
77382aee | 1118 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1119 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1120 | #endif | |
1121 | #endif | |
c906108c | 1122 | |
c3f6f71d JM |
1123 | if (pi->status_valid) |
1124 | { | |
19958708 | 1125 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1126 | proc_why (pi), |
19958708 | 1127 | proc_what (pi), |
c3f6f71d JM |
1128 | proc_get_current_thread (pi)); |
1129 | } | |
c906108c | 1130 | |
77382aee | 1131 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1132 | pi->gregs_valid = pi->status_valid; |
1133 | #ifdef NEW_PROC_API | |
77382aee PA |
1134 | /* In the read/write multiple-fd model, the status struct includes |
1135 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1136 | pi->fpregs_valid = pi->status_valid; |
1137 | #endif | |
77382aee | 1138 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1139 | } |
c906108c | 1140 | |
77382aee | 1141 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 1142 | |
d3581e61 | 1143 | static long |
fba45db2 | 1144 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1145 | { |
1146 | if (!pi->status_valid) | |
1147 | if (!proc_get_status (pi)) | |
0df8b418 | 1148 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1149 | |
c3f6f71d | 1150 | #ifdef NEW_PROC_API |
0d06e24b JM |
1151 | # ifdef UNIXWARE |
1152 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1153 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
77382aee | 1154 | The two sets of flags don't overlap. */ |
0d06e24b JM |
1155 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; |
1156 | # else | |
c3f6f71d | 1157 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1158 | # endif |
c3f6f71d JM |
1159 | #else |
1160 | return pi->prstatus.pr_flags; | |
1161 | #endif | |
1162 | } | |
c906108c | 1163 | |
77382aee | 1164 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1165 | |
d3581e61 | 1166 | static int |
fba45db2 | 1167 | proc_why (procinfo *pi) |
c3f6f71d JM |
1168 | { |
1169 | if (!pi->status_valid) | |
1170 | if (!proc_get_status (pi)) | |
0df8b418 | 1171 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1172 | |
c3f6f71d JM |
1173 | #ifdef NEW_PROC_API |
1174 | return pi->prstatus.pr_lwp.pr_why; | |
1175 | #else | |
1176 | return pi->prstatus.pr_why; | |
1177 | #endif | |
1178 | } | |
c906108c | 1179 | |
77382aee | 1180 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1181 | |
d3581e61 | 1182 | static int |
fba45db2 | 1183 | proc_what (procinfo *pi) |
c3f6f71d JM |
1184 | { |
1185 | if (!pi->status_valid) | |
1186 | if (!proc_get_status (pi)) | |
0df8b418 | 1187 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1188 | |
c3f6f71d JM |
1189 | #ifdef NEW_PROC_API |
1190 | return pi->prstatus.pr_lwp.pr_what; | |
1191 | #else | |
1192 | return pi->prstatus.pr_what; | |
c906108c | 1193 | #endif |
c3f6f71d | 1194 | } |
c906108c | 1195 | |
77382aee PA |
1196 | /* This function is only called when PI is stopped by a watchpoint. |
1197 | Assuming the OS supports it, write to *ADDR the data address which | |
1198 | triggered it and return 1. Return 0 if it is not possible to know | |
1199 | the address. */ | |
bf701c2c PM |
1200 | |
1201 | static int | |
1202 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1203 | { | |
1204 | if (!pi->status_valid) | |
1205 | if (!proc_get_status (pi)) | |
1206 | return 0; | |
1207 | ||
1208 | #ifdef NEW_PROC_API | |
1209 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1210 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1211 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); | |
1212 | #else | |
1213 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch, | |
1214 | builtin_type (target_gdbarch)->builtin_data_ptr, | |
1215 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); | |
1216 | #endif | |
1217 | return 1; | |
1218 | } | |
1219 | ||
c3f6f71d | 1220 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1221 | |
1222 | /* Returns the pr_nsysarg field (number of args to the current | |
1223 | syscall). */ | |
c3f6f71d | 1224 | |
d3581e61 | 1225 | static int |
fba45db2 | 1226 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1227 | { |
1228 | if (!pi->status_valid) | |
1229 | if (!proc_get_status (pi)) | |
1230 | return 0; | |
19958708 | 1231 | |
c3f6f71d JM |
1232 | #ifdef NEW_PROC_API |
1233 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1234 | #else | |
1235 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1236 | #endif |
c3f6f71d | 1237 | } |
c906108c | 1238 | |
77382aee PA |
1239 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1240 | syscall). */ | |
c906108c | 1241 | |
d3581e61 | 1242 | static long * |
fba45db2 | 1243 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1244 | { |
1245 | if (!pi->status_valid) | |
1246 | if (!proc_get_status (pi)) | |
1247 | return NULL; | |
19958708 | 1248 | |
c3f6f71d JM |
1249 | #ifdef NEW_PROC_API |
1250 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1251 | #else | |
1252 | return (long *) &pi->prstatus.pr_sysarg; | |
1253 | #endif | |
1254 | } | |
c3f6f71d | 1255 | #endif /* PIOCSSPCACT */ |
c906108c | 1256 | |
d3581e61 | 1257 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
77382aee | 1258 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1259 | |
d3581e61 | 1260 | static long |
c3f6f71d JM |
1261 | proc_cursig (struct procinfo *pi) |
1262 | { | |
1263 | if (!pi->status_valid) | |
1264 | if (!proc_get_status (pi)) | |
0df8b418 | 1265 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1266 | |
c3f6f71d JM |
1267 | #ifdef NEW_PROC_API |
1268 | return pi->prstatus.pr_lwp.pr_cursig; | |
1269 | #else | |
1270 | return pi->prstatus.pr_cursig; | |
1271 | #endif | |
1272 | } | |
d3581e61 | 1273 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
c906108c | 1274 | |
77382aee PA |
1275 | /* === I appologize for the messiness of this function. |
1276 | === This is an area where the different versions of | |
1277 | === /proc are more inconsistent than usual. | |
1278 | ||
1279 | Set or reset any of the following process flags: | |
1280 | PR_FORK -- forked child will inherit trace flags | |
1281 | PR_RLC -- traced process runs when last /proc file closed. | |
1282 | PR_KLC -- traced process is killed when last /proc file closed. | |
1283 | PR_ASYNC -- LWP's get to run/stop independently. | |
1284 | ||
1285 | There are three methods for doing this function: | |
1286 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1287 | [Sol6, Sol7, UW] | |
1288 | 2) Middle: PIOCSET/PIOCRESET | |
1289 | [Irix, Sol5] | |
1290 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1291 | [OSF, Sol5] | |
1292 | ||
1293 | Note: Irix does not define PR_ASYNC. | |
1294 | Note: OSF does not define PR_KLC. | |
1295 | Note: OSF is the only one that can ONLY use the oldest method. | |
1296 | ||
1297 | Arguments: | |
1298 | pi -- the procinfo | |
1299 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1300 | mode -- 1 for set, 0 for reset. | |
1301 | ||
1302 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1303 | |
c3f6f71d | 1304 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1305 | |
c3f6f71d | 1306 | static int |
fba45db2 | 1307 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1308 | { |
1309 | long win = 0; /* default to fail */ | |
1310 | ||
77382aee PA |
1311 | /* These operations affect the process as a whole, and applying them |
1312 | to an individual LWP has the same meaning as applying them to the | |
1313 | main process. Therefore, if we're ever called with a pointer to | |
1314 | an LWP's procinfo, let's substitute the process's procinfo and | |
1315 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1316 | |
1317 | if (pi->pid != 0) | |
1318 | pi = find_procinfo_or_die (pi->pid, 0); | |
1319 | ||
0df8b418 | 1320 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii. */ |
19958708 | 1321 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1322 | (which for no obvious reason has a different definition |
1323 | from one operating system to the next...) */ | |
1324 | #ifdef PCUNSET | |
1325 | #define GDBRESET PCUNSET | |
37de36c6 | 1326 | #else |
c3f6f71d JM |
1327 | #ifdef PCRESET |
1328 | #define GDBRESET PCRESET | |
37de36c6 | 1329 | #endif |
c906108c | 1330 | #endif |
c3f6f71d | 1331 | { |
37de36c6 | 1332 | procfs_ctl_t arg[2]; |
c906108c | 1333 | |
0df8b418 | 1334 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1335 | arg[0] = PCSET; |
0df8b418 | 1336 | else /* Reset the flag. */ |
c3f6f71d | 1337 | arg[0] = GDBRESET; |
c5aa993b | 1338 | |
c3f6f71d JM |
1339 | arg[1] = flag; |
1340 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1341 | } | |
1342 | #else | |
1343 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1344 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1345 | { |
1346 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1347 | } | |
0df8b418 | 1348 | else /* Reset the flag. */ |
c3f6f71d JM |
1349 | { |
1350 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1351 | } | |
c906108c | 1352 | |
c3f6f71d JM |
1353 | #else |
1354 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1355 | switch (flag) { | |
1356 | case PR_RLC: | |
1357 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1358 | { | |
1359 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1360 | } | |
1361 | else /* Clear run-on-last-close */ | |
1362 | { | |
1363 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1364 | } | |
1365 | break; | |
1366 | case PR_FORK: | |
1367 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1368 | { | |
1369 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1370 | } | |
1371 | else /* Clear inherit-on-fork */ | |
1372 | { | |
1373 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1374 | } | |
1375 | break; | |
1376 | default: | |
0df8b418 | 1377 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1378 | break; |
1379 | } | |
1380 | #endif | |
1381 | #endif | |
1382 | #endif | |
1383 | #undef GDBRESET | |
77382aee PA |
1384 | /* The above operation renders the procinfo's cached pstatus |
1385 | obsolete. */ | |
c3f6f71d | 1386 | pi->status_valid = 0; |
c906108c | 1387 | |
c3f6f71d | 1388 | if (!win) |
8a3fe4f8 | 1389 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1390 | flag == PR_FORK ? "PR_FORK" : |
1391 | flag == PR_RLC ? "PR_RLC" : | |
1392 | #ifdef PR_ASYNC | |
1393 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1394 | #endif |
1395 | #ifdef PR_KLC | |
1396 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1397 | #endif |
1398 | "<unknown flag>", | |
1399 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1400 | |
c3f6f71d JM |
1401 | return win; |
1402 | } | |
c906108c | 1403 | |
77382aee PA |
1404 | /* Set the run_on_last_close flag. Process with all threads will |
1405 | become runnable when debugger closes all /proc fds. Returns | |
1406 | non-zero for success, zero for failure. */ | |
c906108c | 1407 | |
d3581e61 | 1408 | static int |
fba45db2 | 1409 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1410 | { |
c3f6f71d JM |
1411 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1412 | } | |
c906108c | 1413 | |
77382aee PA |
1414 | /* Reset the run_on_last_close flag. The process will NOT become |
1415 | runnable when debugger closes its file handles. Returns non-zero | |
1416 | for success, zero for failure. */ | |
c906108c | 1417 | |
d3581e61 | 1418 | static int |
fba45db2 | 1419 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1420 | { |
1421 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1422 | } |
1423 | ||
77382aee PA |
1424 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1425 | are registered for events in the parent, then we will NOT recieve | |
1426 | events from the child. Returns non-zero for success, zero for | |
1427 | failure. */ | |
c906108c | 1428 | |
d3581e61 | 1429 | static int |
fba45db2 | 1430 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1431 | { |
1432 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1433 | } | |
c906108c | 1434 | |
c3f6f71d | 1435 | #ifdef PR_ASYNC |
77382aee PA |
1436 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1437 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1438 | non-zero for success, zero for failure. */ | |
c906108c | 1439 | |
d3581e61 | 1440 | static int |
fba45db2 | 1441 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1442 | { |
1443 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1444 | } | |
c906108c | 1445 | |
77382aee PA |
1446 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1447 | (signal etc.), then all other LWPs will stop as well. Returns | |
1448 | non-zero for success, zero for failure. */ | |
c906108c | 1449 | |
d3581e61 | 1450 | static int |
fba45db2 | 1451 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1452 | { |
1453 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1454 | } | |
1455 | #endif /* PR_ASYNC */ | |
c906108c | 1456 | |
77382aee PA |
1457 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1458 | for success, zero for failure. */ | |
c906108c | 1459 | |
d3581e61 | 1460 | static int |
fba45db2 | 1461 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1462 | { |
1463 | int win; | |
c906108c | 1464 | |
77382aee PA |
1465 | /* We might conceivably apply this operation to an LWP, and the |
1466 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1467 | |
c3f6f71d JM |
1468 | if (pi->ctl_fd == 0 && |
1469 | open_procinfo_files (pi, FD_CTL) == 0) | |
1470 | return 0; | |
1471 | else | |
1472 | { | |
1473 | #ifdef NEW_PROC_API | |
37de36c6 | 1474 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1475 | |
c3f6f71d JM |
1476 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1477 | #else /* ioctl method */ | |
1478 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1479 | /* Note: the call also reads the prstatus. */ | |
1480 | if (win) | |
1481 | { | |
1482 | pi->status_valid = 1; | |
19958708 | 1483 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1484 | proc_why (pi), |
19958708 | 1485 | proc_what (pi), |
c3f6f71d JM |
1486 | proc_get_current_thread (pi)); |
1487 | } | |
1488 | #endif | |
1489 | } | |
c906108c | 1490 | |
c3f6f71d JM |
1491 | return win; |
1492 | } | |
c5aa993b | 1493 | |
77382aee PA |
1494 | /* Wait for the process or LWP to stop (block until it does). Returns |
1495 | non-zero for success, zero for failure. */ | |
c906108c | 1496 | |
d3581e61 | 1497 | static int |
fba45db2 | 1498 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1499 | { |
c3f6f71d JM |
1500 | int win; |
1501 | ||
77382aee PA |
1502 | /* We should never have to apply this operation to any procinfo |
1503 | except the one for the main process. If that ever changes for | |
1504 | any reason, then take out the following clause and replace it | |
1505 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1506 | |
c3f6f71d JM |
1507 | if (pi->tid != 0) |
1508 | pi = find_procinfo_or_die (pi->pid, 0); | |
1509 | ||
1510 | #ifdef NEW_PROC_API | |
1511 | { | |
37de36c6 | 1512 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1513 | |
c3f6f71d JM |
1514 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1515 | /* We been runnin' and we stopped -- need to update status. */ | |
1516 | pi->status_valid = 0; | |
1517 | } | |
1518 | #else /* ioctl method */ | |
1519 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1520 | /* Above call also refreshes the prstatus. */ | |
1521 | if (win) | |
1522 | { | |
1523 | pi->status_valid = 1; | |
19958708 | 1524 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1525 | proc_why (pi), |
19958708 | 1526 | proc_what (pi), |
c3f6f71d JM |
1527 | proc_get_current_thread (pi)); |
1528 | } | |
c906108c SS |
1529 | #endif |
1530 | ||
c3f6f71d | 1531 | return win; |
c906108c SS |
1532 | } |
1533 | ||
77382aee PA |
1534 | /* Make the process or LWP runnable. |
1535 | ||
1536 | Options (not all are implemented): | |
1537 | - single-step | |
1538 | - clear current fault | |
1539 | - clear current signal | |
1540 | - abort the current system call | |
1541 | - stop as soon as finished with system call | |
1542 | - (ioctl): set traced signal set | |
1543 | - (ioctl): set held signal set | |
1544 | - (ioctl): set traced fault set | |
1545 | - (ioctl): set start pc (vaddr) | |
1546 | ||
1547 | Always clears the current fault. PI is the process or LWP to | |
1548 | operate on. If STEP is true, set the process or LWP to trap after | |
1549 | one instruction. If SIGNO is zero, clear the current signal if | |
1550 | any; if non-zero, set the current signal to this one. Returns | |
1551 | non-zero for success, zero for failure. */ | |
c3f6f71d | 1552 | |
d3581e61 | 1553 | static int |
fba45db2 | 1554 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1555 | { |
1556 | int win; | |
1557 | int runflags; | |
1558 | ||
77382aee PA |
1559 | /* We will probably have to apply this operation to individual |
1560 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1561 | |
c3f6f71d JM |
1562 | if (pi->ctl_fd == 0 && |
1563 | open_procinfo_files (pi, FD_CTL) == 0) | |
1564 | { | |
1565 | return 0; | |
1566 | } | |
c906108c | 1567 | |
0df8b418 | 1568 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1569 | if (step) |
1570 | runflags |= PRSTEP; | |
1571 | if (signo == 0) | |
1572 | runflags |= PRCSIG; | |
0df8b418 | 1573 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1574 | proc_set_current_signal (pi, signo); |
c5aa993b | 1575 | |
c3f6f71d JM |
1576 | #ifdef NEW_PROC_API |
1577 | { | |
37de36c6 | 1578 | procfs_ctl_t cmd[2]; |
c906108c | 1579 | |
c3f6f71d JM |
1580 | cmd[0] = PCRUN; |
1581 | cmd[1] = runflags; | |
1582 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1583 | } | |
1584 | #else /* ioctl method */ | |
1585 | { | |
1586 | prrun_t prrun; | |
c906108c | 1587 | |
c3f6f71d JM |
1588 | memset (&prrun, 0, sizeof (prrun)); |
1589 | prrun.pr_flags = runflags; | |
1590 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1591 | } | |
1592 | #endif | |
c906108c | 1593 | |
c3f6f71d JM |
1594 | return win; |
1595 | } | |
c906108c | 1596 | |
77382aee PA |
1597 | /* Register to trace signals in the process or LWP. Returns non-zero |
1598 | for success, zero for failure. */ | |
c906108c | 1599 | |
d3581e61 | 1600 | static int |
37de36c6 | 1601 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1602 | { |
c3f6f71d JM |
1603 | int win; |
1604 | ||
77382aee PA |
1605 | /* We should never have to apply this operation to any procinfo |
1606 | except the one for the main process. If that ever changes for | |
1607 | any reason, then take out the following clause and replace it | |
1608 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1609 | |
c3f6f71d JM |
1610 | if (pi->tid != 0) |
1611 | pi = find_procinfo_or_die (pi->pid, 0); | |
1612 | ||
1613 | #ifdef NEW_PROC_API | |
1614 | { | |
1615 | struct { | |
37de36c6 | 1616 | procfs_ctl_t cmd; |
c3f6f71d | 1617 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1618 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1619 | } arg; |
c906108c | 1620 | |
c3f6f71d | 1621 | arg.cmd = PCSTRACE; |
37de36c6 | 1622 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1623 | |
c3f6f71d JM |
1624 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1625 | } | |
1626 | #else /* ioctl method */ | |
1627 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1628 | #endif | |
0df8b418 | 1629 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1630 | pi->status_valid = 0; |
c906108c | 1631 | |
c3f6f71d | 1632 | if (!win) |
8a3fe4f8 | 1633 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1634 | return win; |
c906108c SS |
1635 | } |
1636 | ||
77382aee PA |
1637 | /* Register to trace hardware faults in the process or LWP. Returns |
1638 | non-zero for success, zero for failure. */ | |
c906108c | 1639 | |
d3581e61 | 1640 | static int |
fba45db2 | 1641 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1642 | { |
1643 | int win; | |
1644 | ||
77382aee PA |
1645 | /* We should never have to apply this operation to any procinfo |
1646 | except the one for the main process. If that ever changes for | |
1647 | any reason, then take out the following clause and replace it | |
1648 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1649 | |
c3f6f71d JM |
1650 | if (pi->tid != 0) |
1651 | pi = find_procinfo_or_die (pi->pid, 0); | |
1652 | ||
1653 | #ifdef NEW_PROC_API | |
1654 | { | |
1655 | struct { | |
37de36c6 | 1656 | procfs_ctl_t cmd; |
c3f6f71d JM |
1657 | /* Use char array to avoid alignment issues. */ |
1658 | char fltset[sizeof (fltset_t)]; | |
1659 | } arg; | |
c906108c | 1660 | |
c3f6f71d JM |
1661 | arg.cmd = PCSFAULT; |
1662 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1663 | |
c3f6f71d JM |
1664 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1665 | } | |
1666 | #else /* ioctl method */ | |
1667 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1668 | #endif | |
0df8b418 | 1669 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1670 | pi->status_valid = 0; |
c906108c | 1671 | |
c3f6f71d JM |
1672 | return win; |
1673 | } | |
c5aa993b | 1674 | |
77382aee PA |
1675 | /* Register to trace entry to system calls in the process or LWP. |
1676 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1677 | |
d3581e61 | 1678 | static int |
fba45db2 | 1679 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1680 | { |
c3f6f71d JM |
1681 | int win; |
1682 | ||
77382aee PA |
1683 | /* We should never have to apply this operation to any procinfo |
1684 | except the one for the main process. If that ever changes for | |
1685 | any reason, then take out the following clause and replace it | |
1686 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1687 | |
c3f6f71d JM |
1688 | if (pi->tid != 0) |
1689 | pi = find_procinfo_or_die (pi->pid, 0); | |
1690 | ||
1691 | #ifdef NEW_PROC_API | |
1692 | { | |
37de36c6 KB |
1693 | struct gdb_proc_ctl_pcsentry { |
1694 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1695 | /* Use char array to avoid alignment issues. */ |
1696 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1697 | } *argp; |
1698 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1699 | - sizeof (sysset_t) |
37de36c6 | 1700 | + sysset_t_size (pi); |
c3f6f71d | 1701 | |
37de36c6 | 1702 | argp = xmalloc (argp_size); |
c3f6f71d | 1703 | |
37de36c6 KB |
1704 | argp->cmd = PCSENTRY; |
1705 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1706 | ||
1707 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1708 | xfree (argp); | |
c3f6f71d JM |
1709 | } |
1710 | #else /* ioctl method */ | |
1711 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1712 | #endif | |
77382aee PA |
1713 | /* The above operation renders the procinfo's cached pstatus |
1714 | obsolete. */ | |
c3f6f71d | 1715 | pi->status_valid = 0; |
19958708 | 1716 | |
c3f6f71d | 1717 | return win; |
c906108c SS |
1718 | } |
1719 | ||
77382aee PA |
1720 | /* Register to trace exit from system calls in the process or LWP. |
1721 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1722 | |
d3581e61 | 1723 | static int |
fba45db2 | 1724 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1725 | { |
1726 | int win; | |
1727 | ||
77382aee PA |
1728 | /* We should never have to apply this operation to any procinfo |
1729 | except the one for the main process. If that ever changes for | |
1730 | any reason, then take out the following clause and replace it | |
1731 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1732 | |
c3f6f71d JM |
1733 | if (pi->tid != 0) |
1734 | pi = find_procinfo_or_die (pi->pid, 0); | |
1735 | ||
1736 | #ifdef NEW_PROC_API | |
1737 | { | |
37de36c6 KB |
1738 | struct gdb_proc_ctl_pcsexit { |
1739 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1740 | /* Use char array to avoid alignment issues. */ |
1741 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1742 | } *argp; |
1743 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1744 | - sizeof (sysset_t) |
37de36c6 | 1745 | + sysset_t_size (pi); |
c906108c | 1746 | |
37de36c6 | 1747 | argp = xmalloc (argp_size); |
c906108c | 1748 | |
37de36c6 KB |
1749 | argp->cmd = PCSEXIT; |
1750 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1751 | ||
1752 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1753 | xfree (argp); | |
c3f6f71d JM |
1754 | } |
1755 | #else /* ioctl method */ | |
1756 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1757 | #endif | |
77382aee PA |
1758 | /* The above operation renders the procinfo's cached pstatus |
1759 | obsolete. */ | |
c3f6f71d | 1760 | pi->status_valid = 0; |
c906108c | 1761 | |
c3f6f71d JM |
1762 | return win; |
1763 | } | |
c906108c | 1764 | |
77382aee PA |
1765 | /* Specify the set of blocked / held signals in the process or LWP. |
1766 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1767 | |
d3581e61 | 1768 | static int |
37de36c6 | 1769 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1770 | { |
c3f6f71d JM |
1771 | int win; |
1772 | ||
77382aee PA |
1773 | /* We should never have to apply this operation to any procinfo |
1774 | except the one for the main process. If that ever changes for | |
1775 | any reason, then take out the following clause and replace it | |
1776 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1777 | |
c3f6f71d JM |
1778 | if (pi->tid != 0) |
1779 | pi = find_procinfo_or_die (pi->pid, 0); | |
1780 | ||
1781 | #ifdef NEW_PROC_API | |
1782 | { | |
1783 | struct { | |
37de36c6 | 1784 | procfs_ctl_t cmd; |
c3f6f71d | 1785 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1786 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1787 | } arg; |
1788 | ||
1789 | arg.cmd = PCSHOLD; | |
37de36c6 | 1790 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1791 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1792 | } | |
c906108c | 1793 | #else |
c3f6f71d | 1794 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1795 | #endif |
77382aee PA |
1796 | /* The above operation renders the procinfo's cached pstatus |
1797 | obsolete. */ | |
c3f6f71d JM |
1798 | pi->status_valid = 0; |
1799 | ||
1800 | return win; | |
c906108c SS |
1801 | } |
1802 | ||
77382aee PA |
1803 | /* Returns the set of signals that are held / blocked. Will also copy |
1804 | the sigset if SAVE is non-zero. */ | |
c906108c | 1805 | |
d3581e61 | 1806 | static gdb_sigset_t * |
37de36c6 | 1807 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1808 | { |
37de36c6 | 1809 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1810 | |
77382aee PA |
1811 | /* We should never have to apply this operation to any procinfo |
1812 | except the one for the main process. If that ever changes for | |
1813 | any reason, then take out the following clause and replace it | |
1814 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1815 | |
c3f6f71d JM |
1816 | if (pi->tid != 0) |
1817 | pi = find_procinfo_or_die (pi->pid, 0); | |
1818 | ||
1819 | #ifdef NEW_PROC_API | |
1820 | if (!pi->status_valid) | |
1821 | if (!proc_get_status (pi)) | |
1822 | return NULL; | |
1823 | ||
1824 | #ifdef UNIXWARE | |
1825 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 1826 | #else |
c3f6f71d JM |
1827 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
1828 | #endif /* UNIXWARE */ | |
1829 | #else /* not NEW_PROC_API */ | |
1830 | { | |
37de36c6 | 1831 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1832 | |
1833 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1834 | ret = &sigheld; | |
1835 | } | |
1836 | #endif /* NEW_PROC_API */ | |
1837 | if (save && ret) | |
37de36c6 | 1838 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1839 | |
1840 | return ret; | |
c906108c SS |
1841 | } |
1842 | ||
77382aee PA |
1843 | /* Returns the set of signals that are traced / debugged. Will also |
1844 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1845 | |
d3581e61 | 1846 | static gdb_sigset_t * |
37de36c6 | 1847 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1848 | { |
37de36c6 | 1849 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1850 | |
77382aee PA |
1851 | /* We should never have to apply this operation to any procinfo |
1852 | except the one for the main process. If that ever changes for | |
1853 | any reason, then take out the following clause and replace it | |
1854 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1855 | |
c3f6f71d JM |
1856 | if (pi->tid != 0) |
1857 | pi = find_procinfo_or_die (pi->pid, 0); | |
1858 | ||
1859 | #ifdef NEW_PROC_API | |
1860 | if (!pi->status_valid) | |
1861 | if (!proc_get_status (pi)) | |
1862 | return NULL; | |
1863 | ||
1864 | ret = &pi->prstatus.pr_sigtrace; | |
1865 | #else | |
1866 | { | |
37de36c6 | 1867 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
1868 | |
1869 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1870 | ret = &sigtrace; | |
1871 | } | |
c906108c | 1872 | #endif |
c3f6f71d | 1873 | if (save && ret) |
37de36c6 | 1874 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1875 | |
c3f6f71d JM |
1876 | return ret; |
1877 | } | |
c906108c | 1878 | |
77382aee PA |
1879 | /* Returns the set of hardware faults that are traced /debugged. Will |
1880 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1881 | |
d3581e61 | 1882 | static fltset_t * |
fba45db2 | 1883 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1884 | { |
1885 | fltset_t *ret = NULL; | |
1886 | ||
77382aee PA |
1887 | /* We should never have to apply this operation to any procinfo |
1888 | except the one for the main process. If that ever changes for | |
1889 | any reason, then take out the following clause and replace it | |
1890 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1891 | |
c3f6f71d JM |
1892 | if (pi->tid != 0) |
1893 | pi = find_procinfo_or_die (pi->pid, 0); | |
1894 | ||
1895 | #ifdef NEW_PROC_API | |
1896 | if (!pi->status_valid) | |
1897 | if (!proc_get_status (pi)) | |
1898 | return NULL; | |
1899 | ||
1900 | ret = &pi->prstatus.pr_flttrace; | |
1901 | #else | |
1902 | { | |
1903 | static fltset_t flttrace; | |
1904 | ||
1905 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1906 | ret = &flttrace; | |
1907 | } | |
1908 | #endif | |
1909 | if (save && ret) | |
1910 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1911 | |
c3f6f71d JM |
1912 | return ret; |
1913 | } | |
c906108c | 1914 | |
77382aee PA |
1915 | /* Returns the set of syscalls that are traced /debugged on entry. |
1916 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1917 | |
d3581e61 | 1918 | static sysset_t * |
fba45db2 | 1919 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1920 | { |
1921 | sysset_t *ret = NULL; | |
1922 | ||
77382aee PA |
1923 | /* We should never have to apply this operation to any procinfo |
1924 | except the one for the main process. If that ever changes for | |
1925 | any reason, then take out the following clause and replace it | |
1926 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1927 | |
c3f6f71d JM |
1928 | if (pi->tid != 0) |
1929 | pi = find_procinfo_or_die (pi->pid, 0); | |
1930 | ||
1931 | #ifdef NEW_PROC_API | |
1932 | if (!pi->status_valid) | |
1933 | if (!proc_get_status (pi)) | |
1934 | return NULL; | |
1935 | ||
37de36c6 | 1936 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1937 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
1938 | #else /* DYNAMIC_SYSCALLS */ |
1939 | { | |
1940 | static sysset_t *sysentry; | |
1941 | size_t size; | |
1942 | ||
1943 | if (!sysentry) | |
1944 | sysentry = sysset_t_alloc (pi); | |
1945 | ret = sysentry; | |
1946 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1947 | return NULL; | |
1948 | if (pi->prstatus.pr_sysentry_offset == 0) | |
1949 | { | |
1950 | gdb_premptysysset (sysentry); | |
1951 | } | |
1952 | else | |
1953 | { | |
1954 | int rsize; | |
1955 | ||
1956 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 1957 | SEEK_SET) |
37de36c6 KB |
1958 | != (off_t) pi->prstatus.pr_sysentry_offset) |
1959 | return NULL; | |
1960 | size = sysset_t_size (pi); | |
1961 | gdb_premptysysset (sysentry); | |
1962 | rsize = read (pi->status_fd, sysentry, size); | |
1963 | if (rsize < 0) | |
1964 | return NULL; | |
1965 | } | |
1966 | } | |
1967 | #endif /* DYNAMIC_SYSCALLS */ | |
1968 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
1969 | { |
1970 | static sysset_t sysentry; | |
c906108c | 1971 | |
c3f6f71d JM |
1972 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1973 | ret = &sysentry; | |
1974 | } | |
37de36c6 | 1975 | #endif /* NEW_PROC_API */ |
c3f6f71d | 1976 | if (save && ret) |
37de36c6 | 1977 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 1978 | |
c3f6f71d JM |
1979 | return ret; |
1980 | } | |
c5aa993b | 1981 | |
77382aee PA |
1982 | /* Returns the set of syscalls that are traced /debugged on exit. |
1983 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1984 | |
d3581e61 | 1985 | static sysset_t * |
fba45db2 | 1986 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1987 | { |
c3f6f71d JM |
1988 | sysset_t * ret = NULL; |
1989 | ||
77382aee PA |
1990 | /* We should never have to apply this operation to any procinfo |
1991 | except the one for the main process. If that ever changes for | |
1992 | any reason, then take out the following clause and replace it | |
1993 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1994 | |
c3f6f71d JM |
1995 | if (pi->tid != 0) |
1996 | pi = find_procinfo_or_die (pi->pid, 0); | |
1997 | ||
1998 | #ifdef NEW_PROC_API | |
1999 | if (!pi->status_valid) | |
2000 | if (!proc_get_status (pi)) | |
2001 | return NULL; | |
2002 | ||
37de36c6 | 2003 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2004 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2005 | #else /* DYNAMIC_SYSCALLS */ |
2006 | { | |
2007 | static sysset_t *sysexit; | |
2008 | size_t size; | |
2009 | ||
2010 | if (!sysexit) | |
2011 | sysexit = sysset_t_alloc (pi); | |
2012 | ret = sysexit; | |
2013 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2014 | return NULL; | |
2015 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2016 | { | |
2017 | gdb_premptysysset (sysexit); | |
2018 | } | |
2019 | else | |
2020 | { | |
2021 | int rsize; | |
2022 | ||
77382aee PA |
2023 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2024 | SEEK_SET) | |
37de36c6 KB |
2025 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2026 | return NULL; | |
2027 | size = sysset_t_size (pi); | |
2028 | gdb_premptysysset (sysexit); | |
2029 | rsize = read (pi->status_fd, sysexit, size); | |
2030 | if (rsize < 0) | |
2031 | return NULL; | |
2032 | } | |
2033 | } | |
2034 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2035 | #else |
2036 | { | |
2037 | static sysset_t sysexit; | |
c5aa993b | 2038 | |
c3f6f71d JM |
2039 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2040 | ret = &sysexit; | |
2041 | } | |
2042 | #endif | |
2043 | if (save && ret) | |
37de36c6 | 2044 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2045 | |
2046 | return ret; | |
2047 | } | |
c906108c | 2048 | |
77382aee PA |
2049 | /* The current fault (if any) is cleared; the associated signal will |
2050 | not be sent to the process or LWP when it resumes. Returns | |
2051 | non-zero for success, zero for failure. */ | |
c906108c | 2052 | |
d3581e61 | 2053 | static int |
fba45db2 | 2054 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2055 | { |
2056 | int win; | |
2057 | ||
77382aee PA |
2058 | /* We should never have to apply this operation to any procinfo |
2059 | except the one for the main process. If that ever changes for | |
2060 | any reason, then take out the following clause and replace it | |
2061 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2062 | |
c3f6f71d JM |
2063 | if (pi->tid != 0) |
2064 | pi = find_procinfo_or_die (pi->pid, 0); | |
2065 | ||
2066 | #ifdef NEW_PROC_API | |
2067 | { | |
37de36c6 | 2068 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2069 | |
c3f6f71d JM |
2070 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2071 | } | |
2072 | #else | |
2073 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2074 | #endif | |
2075 | ||
2076 | return win; | |
c906108c SS |
2077 | } |
2078 | ||
77382aee PA |
2079 | /* Set the "current signal" that will be delivered next to the |
2080 | process. NOTE: semantics are different from those of KILL. This | |
2081 | signal will be delivered to the process or LWP immediately when it | |
2082 | is resumed (even if the signal is held/blocked); it will NOT | |
2083 | immediately cause another event of interest, and will NOT first | |
2084 | trap back to the debugger. Returns non-zero for success, zero for | |
2085 | failure. */ | |
c3f6f71d | 2086 | |
d3581e61 | 2087 | static int |
fba45db2 | 2088 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2089 | { |
2090 | int win; | |
2091 | struct { | |
37de36c6 | 2092 | procfs_ctl_t cmd; |
c3f6f71d | 2093 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2094 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2095 | } arg; |
73930d4d | 2096 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2097 | ptid_t wait_ptid; |
2098 | struct target_waitstatus wait_status; | |
c3f6f71d | 2099 | |
77382aee PA |
2100 | /* We should never have to apply this operation to any procinfo |
2101 | except the one for the main process. If that ever changes for | |
2102 | any reason, then take out the following clause and replace it | |
2103 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2104 | |
c3f6f71d JM |
2105 | if (pi->tid != 0) |
2106 | pi = find_procinfo_or_die (pi->pid, 0); | |
2107 | ||
2108 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2109 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2110 | receives a PIOCSSIG with a signal identical to the current |
2111 | signal, it messes up the current signal. Work around the kernel | |
2112 | bug. */ | |
c3f6f71d JM |
2113 | if (signo > 0 && |
2114 | signo == proc_cursig (pi)) | |
0df8b418 | 2115 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2116 | #endif |
2117 | ||
2118 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2119 | get_last_target_status (&wait_ptid, &wait_status); |
2120 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2121 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 2122 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 JM |
2123 | && proc_get_status (pi) |
2124 | #ifdef NEW_PROC_API | |
2125 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2126 | #else | |
2127 | && pi->prstatus.pr_info.si_signo == signo | |
2128 | #endif | |
2129 | ) | |
2130 | /* Use the siginfo associated with the signal being | |
2131 | redelivered. */ | |
2132 | #ifdef NEW_PROC_API | |
73930d4d | 2133 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2134 | #else |
73930d4d | 2135 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2136 | #endif |
2137 | else | |
2138 | { | |
73930d4d KH |
2139 | mysinfo.si_signo = signo; |
2140 | mysinfo.si_code = 0; | |
2141 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2142 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2143 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2144 | } |
c3f6f71d JM |
2145 | |
2146 | #ifdef NEW_PROC_API | |
2147 | arg.cmd = PCSSIG; | |
2148 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2149 | #else | |
2150 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2151 | #endif | |
c906108c | 2152 | |
c3f6f71d JM |
2153 | return win; |
2154 | } | |
c906108c | 2155 | |
77382aee PA |
2156 | /* The current signal (if any) is cleared, and is not sent to the |
2157 | process or LWP when it resumes. Returns non-zero for success, zero | |
2158 | for failure. */ | |
c906108c | 2159 | |
d3581e61 | 2160 | static int |
fba45db2 | 2161 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2162 | { |
2163 | int win; | |
2164 | ||
77382aee PA |
2165 | /* We should never have to apply this operation to any procinfo |
2166 | except the one for the main process. If that ever changes for | |
2167 | any reason, then take out the following clause and replace it | |
2168 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2169 | |
c3f6f71d JM |
2170 | if (pi->tid != 0) |
2171 | pi = find_procinfo_or_die (pi->pid, 0); | |
2172 | ||
2173 | #ifdef NEW_PROC_API | |
2174 | { | |
2175 | struct { | |
37de36c6 | 2176 | procfs_ctl_t cmd; |
c3f6f71d | 2177 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2178 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2179 | } arg; |
73930d4d | 2180 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2181 | |
2182 | arg.cmd = PCSSIG; | |
2183 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2184 | mysinfo.si_signo = 0; |
2185 | mysinfo.si_code = 0; | |
2186 | mysinfo.si_errno = 0; | |
2187 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2188 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2189 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2190 | |
2191 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2192 | } | |
2193 | #else | |
2194 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2195 | #endif | |
c906108c | 2196 | |
c3f6f71d JM |
2197 | return win; |
2198 | } | |
c906108c | 2199 | |
772cf8be MK |
2200 | /* Return the general-purpose registers for the process or LWP |
2201 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2202 | |
d3581e61 | 2203 | static gdb_gregset_t * |
fba45db2 | 2204 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2205 | { |
2206 | if (!pi->status_valid || !pi->gregs_valid) | |
2207 | if (!proc_get_status (pi)) | |
2208 | return NULL; | |
2209 | ||
772cf8be MK |
2210 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2211 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2212 | |
2213 | #ifdef NEW_PROC_API | |
772cf8be | 2214 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2215 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2216 | # else |
c3f6f71d | 2217 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2218 | # endif |
2219 | #else | |
c3f6f71d | 2220 | return &pi->prstatus.pr_reg; |
772cf8be | 2221 | #endif |
c3f6f71d | 2222 | } |
c5aa993b | 2223 | |
772cf8be MK |
2224 | /* Return the general-purpose registers for the process or LWP |
2225 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2226 | |
d3581e61 | 2227 | static gdb_fpregset_t * |
fba45db2 | 2228 | proc_get_fpregs (procinfo *pi) |
c906108c | 2229 | { |
c3f6f71d JM |
2230 | #ifdef NEW_PROC_API |
2231 | if (!pi->status_valid || !pi->fpregs_valid) | |
2232 | if (!proc_get_status (pi)) | |
2233 | return NULL; | |
2234 | ||
772cf8be | 2235 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2236 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2237 | # else |
c3f6f71d | 2238 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2239 | # endif |
c5aa993b | 2240 | |
772cf8be | 2241 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2242 | if (pi->fpregs_valid) |
772cf8be | 2243 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2244 | else |
c906108c | 2245 | { |
772cf8be | 2246 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2247 | { |
c3f6f71d | 2248 | return NULL; |
c906108c | 2249 | } |
c3f6f71d | 2250 | else |
c906108c | 2251 | { |
772cf8be | 2252 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2253 | struct { |
2254 | long pr_count; | |
2255 | tid_t pr_error_thread; | |
2256 | tfpregset_t thread_1; | |
2257 | } thread_fpregs; | |
2258 | ||
2259 | thread_fpregs.pr_count = 1; | |
2260 | thread_fpregs.thread_1.tid = pi->tid; | |
2261 | ||
772cf8be MK |
2262 | if (pi->tid == 0 |
2263 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2264 | { |
2265 | pi->fpregs_valid = 1; | |
772cf8be | 2266 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2267 | } |
772cf8be MK |
2268 | else if (pi->tid != 0 |
2269 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2270 | { |
2271 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2272 | sizeof (pi->fpregset)); | |
2273 | pi->fpregs_valid = 1; | |
772cf8be | 2274 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2275 | } |
2276 | else | |
2277 | { | |
2278 | return NULL; | |
2279 | } | |
772cf8be | 2280 | # else |
c3f6f71d JM |
2281 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2282 | { | |
2283 | pi->fpregs_valid = 1; | |
772cf8be | 2284 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2285 | } |
2286 | else | |
2287 | { | |
2288 | return NULL; | |
2289 | } | |
772cf8be | 2290 | # endif |
c906108c | 2291 | } |
c906108c | 2292 | } |
772cf8be | 2293 | #endif /* NEW_PROC_API */ |
c906108c SS |
2294 | } |
2295 | ||
772cf8be MK |
2296 | /* Write the general-purpose registers back to the process or LWP |
2297 | corresponding to PI. Return non-zero for success, zero for | |
2298 | failure. */ | |
c3f6f71d | 2299 | |
d3581e61 | 2300 | static int |
fba45db2 | 2301 | proc_set_gregs (procinfo *pi) |
c906108c | 2302 | { |
c3f6f71d JM |
2303 | gdb_gregset_t *gregs; |
2304 | int win; | |
c5aa993b | 2305 | |
772cf8be MK |
2306 | gregs = proc_get_gregs (pi); |
2307 | if (gregs == NULL) | |
2308 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2309 | |
772cf8be | 2310 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2311 | { |
c3f6f71d | 2312 | return 0; |
c906108c | 2313 | } |
c3f6f71d | 2314 | else |
c906108c | 2315 | { |
c3f6f71d JM |
2316 | #ifdef NEW_PROC_API |
2317 | struct { | |
37de36c6 | 2318 | procfs_ctl_t cmd; |
c3f6f71d JM |
2319 | /* Use char array to avoid alignment issues. */ |
2320 | char gregs[sizeof (gdb_gregset_t)]; | |
2321 | } arg; | |
2322 | ||
772cf8be | 2323 | arg.cmd = PCSREG; |
c3f6f71d JM |
2324 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2325 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2326 | #else | |
2327 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2328 | #endif | |
c906108c | 2329 | } |
c3f6f71d | 2330 | |
772cf8be | 2331 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2332 | pi->gregs_valid = 0; |
2333 | return win; | |
c906108c SS |
2334 | } |
2335 | ||
772cf8be MK |
2336 | /* Write the floating-pointer registers back to the process or LWP |
2337 | corresponding to PI. Return non-zero for success, zero for | |
2338 | failure. */ | |
c3f6f71d | 2339 | |
d3581e61 | 2340 | static int |
fba45db2 | 2341 | proc_set_fpregs (procinfo *pi) |
c906108c | 2342 | { |
c3f6f71d JM |
2343 | gdb_fpregset_t *fpregs; |
2344 | int win; | |
2345 | ||
772cf8be MK |
2346 | fpregs = proc_get_fpregs (pi); |
2347 | if (fpregs == NULL) | |
2348 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2349 | |
772cf8be | 2350 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2351 | { |
c3f6f71d | 2352 | return 0; |
c906108c | 2353 | } |
c3f6f71d | 2354 | else |
c906108c | 2355 | { |
c3f6f71d JM |
2356 | #ifdef NEW_PROC_API |
2357 | struct { | |
37de36c6 | 2358 | procfs_ctl_t cmd; |
c3f6f71d JM |
2359 | /* Use char array to avoid alignment issues. */ |
2360 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2361 | } arg; | |
2362 | ||
772cf8be | 2363 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2364 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2365 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2366 | #else | |
772cf8be | 2367 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2368 | if (pi->tid == 0) |
2369 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2370 | else | |
2371 | { | |
2372 | struct { | |
2373 | long pr_count; | |
2374 | tid_t pr_error_thread; | |
2375 | tfpregset_t thread_1; | |
2376 | } thread_fpregs; | |
2377 | ||
2378 | thread_fpregs.pr_count = 1; | |
2379 | thread_fpregs.thread_1.tid = pi->tid; | |
2380 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2381 | sizeof (*fpregs)); | |
2382 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2383 | } | |
772cf8be | 2384 | # else |
c3f6f71d | 2385 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2386 | # endif |
2387 | #endif /* NEW_PROC_API */ | |
c906108c | 2388 | } |
c3f6f71d | 2389 | |
772cf8be | 2390 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2391 | pi->fpregs_valid = 0; |
2392 | return win; | |
c906108c SS |
2393 | } |
2394 | ||
77382aee PA |
2395 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2396 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2397 | |
d3581e61 | 2398 | static int |
fba45db2 | 2399 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2400 | { |
2401 | int win; | |
c906108c | 2402 | |
77382aee PA |
2403 | /* We might conceivably apply this operation to an LWP, and the |
2404 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2405 | |
c3f6f71d JM |
2406 | if (pi->ctl_fd == 0 && |
2407 | open_procinfo_files (pi, FD_CTL) == 0) | |
2408 | { | |
2409 | return 0; | |
2410 | } | |
2411 | else | |
2412 | { | |
2413 | #ifdef NEW_PROC_API | |
37de36c6 | 2414 | procfs_ctl_t cmd[2]; |
c906108c | 2415 | |
c3f6f71d JM |
2416 | cmd[0] = PCKILL; |
2417 | cmd[1] = signo; | |
2418 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2419 | #else /* ioctl method */ | |
2420 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2421 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2422 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2423 | #endif | |
2424 | } | |
c906108c | 2425 | |
c3f6f71d JM |
2426 | return win; |
2427 | } | |
c906108c | 2428 | |
77382aee PA |
2429 | /* Find the pid of the process that started this one. Returns the |
2430 | parent process pid, or zero. */ | |
c906108c | 2431 | |
d3581e61 | 2432 | static int |
fba45db2 | 2433 | proc_parent_pid (procinfo *pi) |
c906108c | 2434 | { |
77382aee PA |
2435 | /* We should never have to apply this operation to any procinfo |
2436 | except the one for the main process. If that ever changes for | |
2437 | any reason, then take out the following clause and replace it | |
2438 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2439 | |
c3f6f71d JM |
2440 | if (pi->tid != 0) |
2441 | pi = find_procinfo_or_die (pi->pid, 0); | |
2442 | ||
2443 | if (!pi->status_valid) | |
2444 | if (!proc_get_status (pi)) | |
2445 | return 0; | |
c5aa993b | 2446 | |
c3f6f71d JM |
2447 | return pi->prstatus.pr_ppid; |
2448 | } | |
2449 | ||
9a043c1d AC |
2450 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2451 | (a.k.a void pointer)! */ | |
2452 | ||
1ca8fce0 JB |
2453 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
2454 | && !(defined (PIOCOPENLWP) || defined (UNIXWARE)) | |
9a043c1d AC |
2455 | static void * |
2456 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2457 | { | |
4e906f53 | 2458 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2459 | void *ptr; |
2460 | ||
4e906f53 | 2461 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2462 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2463 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2464 | return ptr; |
2465 | } | |
1ca8fce0 | 2466 | #endif |
9a043c1d | 2467 | |
a0911fd0 | 2468 | static int |
fba45db2 | 2469 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2470 | { |
d1a7880c PA |
2471 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2472 | /* If neither or these is defined, we can't support watchpoints. | |
2473 | This just avoids possibly failing to compile the below on such | |
2474 | systems. */ | |
c3f6f71d JM |
2475 | return 0; |
2476 | #else | |
0df8b418 MS |
2477 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
2478 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out. */ | |
c3f6f71d JM |
2479 | return 0; |
2480 | #else | |
2481 | struct { | |
37de36c6 | 2482 | procfs_ctl_t cmd; |
c3f6f71d JM |
2483 | char watch[sizeof (prwatch_t)]; |
2484 | } arg; | |
73930d4d | 2485 | prwatch_t pwatch; |
c3f6f71d | 2486 | |
9a043c1d AC |
2487 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2488 | convert a target address into something that can be stored in a | |
2489 | native data structure. */ | |
831e682e | 2490 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2491 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2492 | #else |
73930d4d | 2493 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2494 | #endif |
73930d4d KH |
2495 | pwatch.pr_size = len; |
2496 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2497 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2498 | arg.cmd = PCWATCH; | |
73930d4d | 2499 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2500 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2501 | #else | |
2502 | #if defined (PIOCSWATCH) | |
73930d4d | 2503 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2504 | #else |
2505 | return 0; /* Fail */ | |
2506 | #endif | |
2507 | #endif | |
2508 | #endif | |
2509 | #endif | |
c906108c SS |
2510 | } |
2511 | ||
965b60ee | 2512 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2513 | |
c3f6f71d | 2514 | #include <sys/sysi86.h> |
c906108c | 2515 | |
77382aee PA |
2516 | /* The KEY is actually the value of the lower 16 bits of the GS |
2517 | register for the LWP that we're interested in. Returns the | |
2518 | matching ssh struct (LDT entry). */ | |
c906108c | 2519 | |
337c776f | 2520 | static struct ssd * |
fba45db2 | 2521 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2522 | { |
c3f6f71d JM |
2523 | static struct ssd *ldt_entry = NULL; |
2524 | #ifdef NEW_PROC_API | |
2525 | char pathname[MAX_PROC_NAME_SIZE]; | |
2526 | struct cleanup *old_chain = NULL; | |
2527 | int fd; | |
2528 | ||
2529 | /* Allocate space for one LDT entry. | |
2530 | This alloc must persist, because we return a pointer to it. */ | |
2531 | if (ldt_entry == NULL) | |
2532 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2533 | ||
2534 | /* Open the file descriptor for the LDT table. */ | |
2535 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2536 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2537 | { |
c3f6f71d JM |
2538 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2539 | return NULL; | |
c906108c | 2540 | } |
0df8b418 | 2541 | /* Make sure it gets closed again! */ |
004527cb | 2542 | old_chain = make_cleanup_close (fd); |
c906108c | 2543 | |
c3f6f71d JM |
2544 | /* Now 'read' thru the table, find a match and return it. */ |
2545 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2546 | { |
c3f6f71d JM |
2547 | if (ldt_entry->sel == 0 && |
2548 | ldt_entry->bo == 0 && | |
2549 | ldt_entry->acc1 == 0 && | |
2550 | ldt_entry->acc2 == 0) | |
2551 | break; /* end of table */ | |
0df8b418 | 2552 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2553 | if (ldt_entry->sel == key) |
2554 | return ldt_entry; | |
c906108c | 2555 | } |
0df8b418 | 2556 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2557 | return NULL; |
2558 | #else | |
2559 | int nldt, i; | |
2560 | static int nalloc = 0; | |
c906108c | 2561 | |
c3f6f71d JM |
2562 | /* Get the number of LDT entries. */ |
2563 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2564 | { |
c3f6f71d JM |
2565 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2566 | return NULL; | |
c906108c SS |
2567 | } |
2568 | ||
0df8b418 MS |
2569 | /* Allocate space for the number of LDT entries. */ |
2570 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2571 | if (nldt > nalloc) |
c906108c | 2572 | { |
19958708 | 2573 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2574 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2575 | nalloc = nldt; | |
2576 | } | |
19958708 | 2577 | |
c3f6f71d JM |
2578 | /* Read the whole table in one gulp. */ |
2579 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2580 | { | |
2581 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2582 | return NULL; | |
c906108c SS |
2583 | } |
2584 | ||
0df8b418 | 2585 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2586 | for (i = 0; i < nldt; i++) |
2587 | if (ldt_entry[i].sel == key) | |
2588 | return &ldt_entry[i]; | |
c906108c | 2589 | |
0df8b418 | 2590 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2591 | return NULL; |
2592 | #endif | |
2593 | } | |
c906108c | 2594 | |
77382aee | 2595 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2596 | |
2597 | struct ssd * | |
2598 | procfs_find_LDT_entry (ptid_t ptid) | |
2599 | { | |
2600 | gdb_gregset_t *gregs; | |
2601 | int key; | |
2602 | procinfo *pi; | |
2603 | ||
0df8b418 | 2604 | /* Find procinfo for the lwp. */ |
965b60ee JB |
2605 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) |
2606 | { | |
0b62613e | 2607 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
2608 | PIDGET (ptid), TIDGET (ptid)); |
2609 | return NULL; | |
2610 | } | |
0df8b418 | 2611 | /* get its general registers. */ |
965b60ee JB |
2612 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2613 | { | |
0b62613e | 2614 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
2615 | PIDGET (ptid), TIDGET (ptid)); |
2616 | return NULL; | |
2617 | } | |
0df8b418 | 2618 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2619 | key = (*gregs)[GS] & 0xffff; |
2620 | ||
0df8b418 | 2621 | /* Find the matching entry and return it. */ |
965b60ee JB |
2622 | return proc_get_LDT_entry (pi, key); |
2623 | } | |
2624 | ||
2625 | #endif | |
c906108c | 2626 | |
c3f6f71d | 2627 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2628 | |
c3f6f71d | 2629 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2630 | |
c3f6f71d JM |
2631 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2632 | since there is a different way to do threads on every OS. */ | |
c906108c | 2633 | |
77382aee | 2634 | /* Returns the number of threads for the process. */ |
c906108c | 2635 | |
c3f6f71d | 2636 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2637 | /* OSF version */ |
d3581e61 | 2638 | static int |
fba45db2 | 2639 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2640 | { |
2641 | int nthreads = 0; | |
c906108c | 2642 | |
c3f6f71d JM |
2643 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2644 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2645 | |
c3f6f71d | 2646 | return nthreads; |
c906108c SS |
2647 | } |
2648 | ||
c3f6f71d JM |
2649 | #else |
2650 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2651 | /* Solaris and Unixware version */ |
d3581e61 | 2652 | static int |
fba45db2 | 2653 | proc_get_nthreads (procinfo *pi) |
c906108c | 2654 | { |
c3f6f71d JM |
2655 | if (!pi->status_valid) |
2656 | if (!proc_get_status (pi)) | |
2657 | return 0; | |
c5aa993b | 2658 | |
77382aee PA |
2659 | /* NEW_PROC_API: only works for the process procinfo, because the |
2660 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2661 | #ifdef NEW_PROC_API |
0df8b418 | 2662 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2663 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2664 | #endif |
c3f6f71d | 2665 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2666 | } |
2667 | ||
c3f6f71d | 2668 | #else |
77382aee | 2669 | /* Default version */ |
d3581e61 | 2670 | static int |
fba45db2 | 2671 | proc_get_nthreads (procinfo *pi) |
c906108c | 2672 | { |
c3f6f71d JM |
2673 | return 0; |
2674 | } | |
2675 | #endif | |
2676 | #endif | |
2677 | ||
77382aee PA |
2678 | /* LWP version. |
2679 | ||
2680 | Return the ID of the thread that had an event of interest. | |
2681 | (ie. the one that hit a breakpoint or other traced event). All | |
2682 | other things being equal, this should be the ID of a thread that is | |
2683 | currently executing. */ | |
c3f6f71d JM |
2684 | |
2685 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
77382aee | 2686 | /* Solaris and Unixware version */ |
d3581e61 | 2687 | static int |
fba45db2 | 2688 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2689 | { |
77382aee PA |
2690 | /* Note: this should be applied to the root procinfo for the |
2691 | process, not to the procinfo for an LWP. If applied to the | |
2692 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2693 | that case, find the parent process procinfo. */ | |
19958708 | 2694 | |
c3f6f71d JM |
2695 | if (pi->tid != 0) |
2696 | pi = find_procinfo_or_die (pi->pid, 0); | |
2697 | ||
2698 | if (!pi->status_valid) | |
2699 | if (!proc_get_status (pi)) | |
2700 | return 0; | |
2701 | ||
2702 | #ifdef NEW_PROC_API | |
2703 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2704 | #else |
c3f6f71d | 2705 | return pi->prstatus.pr_who; |
c906108c | 2706 | #endif |
c3f6f71d | 2707 | } |
c906108c | 2708 | |
c3f6f71d JM |
2709 | #else |
2710 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2711 | /* OSF version */ |
d3581e61 | 2712 | static int |
fba45db2 | 2713 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2714 | { |
0df8b418 | 2715 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2716 | return pi->prstatus.pr_tid; |
2717 | #else | |
2718 | return 0; | |
2719 | #endif | |
c906108c SS |
2720 | } |
2721 | ||
c3f6f71d | 2722 | #else |
77382aee | 2723 | /* Default version */ |
d3581e61 | 2724 | static int |
fba45db2 | 2725 | proc_get_current_thread (procinfo *pi) |
c906108c | 2726 | { |
c3f6f71d JM |
2727 | return 0; |
2728 | } | |
2729 | ||
2730 | #endif | |
2731 | #endif | |
c906108c | 2732 | |
77382aee PA |
2733 | /* Discover the IDs of all the threads within the process, and create |
2734 | a procinfo for each of them (chained to the parent). This | |
2735 | unfortunately requires a different method on every OS. Returns | |
2736 | non-zero for success, zero for failure. */ | |
c906108c | 2737 | |
a0911fd0 | 2738 | static int |
fba45db2 | 2739 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2740 | { |
2741 | if (thread && parent) /* sanity */ | |
c906108c | 2742 | { |
c3f6f71d JM |
2743 | thread->status_valid = 0; |
2744 | if (!proc_get_status (thread)) | |
2745 | destroy_one_procinfo (&parent->thread_list, thread); | |
2746 | } | |
2747 | return 0; /* keep iterating */ | |
2748 | } | |
c5aa993b | 2749 | |
c3f6f71d | 2750 | #if defined (PIOCLSTATUS) |
77382aee | 2751 | /* Solaris 2.5 (ioctl) version */ |
d3581e61 | 2752 | static int |
fba45db2 | 2753 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2754 | { |
2755 | gdb_prstatus_t *prstatus; | |
2756 | struct cleanup *old_chain = NULL; | |
2757 | procinfo *thread; | |
2758 | int nlwp, i; | |
2759 | ||
77382aee PA |
2760 | /* We should never have to apply this operation to any procinfo |
2761 | except the one for the main process. If that ever changes for | |
2762 | any reason, then take out the following clause and replace it | |
2763 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2764 | |
c3f6f71d JM |
2765 | if (pi->tid != 0) |
2766 | pi = find_procinfo_or_die (pi->pid, 0); | |
2767 | ||
2768 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2769 | ||
2770 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2771 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2772 | ||
3c37485b | 2773 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2774 | |
b8c9b27d | 2775 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2776 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2777 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2778 | ||
77382aee | 2779 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2780 | for (i = 1; i < nlwp + 1; i++) |
2781 | { | |
2782 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2783 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2784 | |
c3f6f71d JM |
2785 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2786 | thread->status_valid = 1; | |
2787 | } | |
2788 | pi->threads_valid = 1; | |
2789 | do_cleanups (old_chain); | |
2790 | return 1; | |
2791 | } | |
2792 | #else | |
2793 | #ifdef NEW_PROC_API | |
0df8b418 | 2794 | /* Unixware and Solaris 6 (and later) version. */ |
004527cb AC |
2795 | static void |
2796 | do_closedir_cleanup (void *dir) | |
2797 | { | |
2798 | closedir (dir); | |
2799 | } | |
2800 | ||
d3581e61 | 2801 | static int |
fba45db2 | 2802 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2803 | { |
2804 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2805 | struct dirent *direntry; | |
2806 | struct cleanup *old_chain = NULL; | |
2807 | procinfo *thread; | |
2808 | DIR *dirp; | |
2809 | int lwpid; | |
2810 | ||
77382aee PA |
2811 | /* We should never have to apply this operation to any procinfo |
2812 | except the one for the main process. If that ever changes for | |
2813 | any reason, then take out the following clause and replace it | |
2814 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2815 | |
c3f6f71d JM |
2816 | if (pi->tid != 0) |
2817 | pi = find_procinfo_or_die (pi->pid, 0); | |
2818 | ||
2819 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2820 | ||
77382aee PA |
2821 | /* Unixware |
2822 | ||
2823 | Note: this brute-force method is the only way I know of to | |
2824 | accomplish this task on Unixware. This method will also work on | |
2825 | Solaris 2.6 and 2.7. There is a much simpler and more elegant | |
2826 | way to do this on Solaris, but the margins of this manuscript are | |
2827 | too small to write it here... ;-) */ | |
c3f6f71d JM |
2828 | |
2829 | strcpy (pathname, pi->pathname); | |
2830 | strcat (pathname, "/lwp"); | |
2831 | if ((dirp = opendir (pathname)) == NULL) | |
2832 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2833 | ||
004527cb | 2834 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2835 | while ((direntry = readdir (dirp)) != NULL) |
2836 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2837 | { | |
2838 | lwpid = atoi (&direntry->d_name[0]); | |
2839 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2840 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2841 | } | |
2842 | pi->threads_valid = 1; | |
2843 | do_cleanups (old_chain); | |
2844 | return 1; | |
2845 | } | |
2846 | #else | |
2847 | #ifdef PIOCTLIST | |
77382aee | 2848 | /* OSF version */ |
d3581e61 | 2849 | static int |
fba45db2 | 2850 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2851 | { |
2852 | int nthreads, i; | |
2853 | tid_t *threads; | |
2854 | ||
77382aee PA |
2855 | /* We should never have to apply this operation to any procinfo |
2856 | except the one for the main process. If that ever changes for | |
2857 | any reason, then take out the following clause and replace it | |
2858 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2859 | |
c3f6f71d JM |
2860 | if (pi->tid != 0) |
2861 | pi = find_procinfo_or_die (pi->pid, 0); | |
2862 | ||
2863 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2864 | ||
2865 | nthreads = proc_get_nthreads (pi); | |
2866 | if (nthreads < 2) | |
0df8b418 | 2867 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 2868 | |
3c37485b | 2869 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 2870 | |
c3f6f71d JM |
2871 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
2872 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2873 | ||
2874 | for (i = 0; i < nthreads; i++) | |
2875 | { | |
2876 | if (!find_procinfo (pi->pid, threads[i])) | |
2877 | if (!create_procinfo (pi->pid, threads[i])) | |
2878 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2879 | } |
c3f6f71d JM |
2880 | pi->threads_valid = 1; |
2881 | return 1; | |
c906108c | 2882 | } |
c3f6f71d | 2883 | #else |
77382aee | 2884 | /* Default version */ |
d3581e61 | 2885 | static int |
fba45db2 | 2886 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2887 | { |
2888 | return 0; | |
2889 | } | |
2890 | #endif /* OSF PIOCTLIST */ | |
2891 | #endif /* NEW_PROC_API */ | |
2892 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 2893 | |
77382aee PA |
2894 | /* Given a pointer to a function, call that function once for each lwp |
2895 | in the procinfo list, until the function returns non-zero, in which | |
2896 | event return the value returned by the function. | |
2897 | ||
2898 | Note: this function does NOT call update_threads. If you want to | |
2899 | discover new threads first, you must call that function explicitly. | |
2900 | This function just makes a quick pass over the currently-known | |
2901 | procinfos. | |
2902 | ||
2903 | PI is the parent process procinfo. FUNC is the per-thread | |
2904 | function. PTR is an opaque parameter for function. Returns the | |
2905 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 2906 | |
d3581e61 | 2907 | static int |
d0849a9a KB |
2908 | proc_iterate_over_threads (procinfo *pi, |
2909 | int (*func) (procinfo *, procinfo *, void *), | |
2910 | void *ptr) | |
c906108c | 2911 | { |
c3f6f71d JM |
2912 | procinfo *thread, *next; |
2913 | int retval = 0; | |
c906108c | 2914 | |
77382aee PA |
2915 | /* We should never have to apply this operation to any procinfo |
2916 | except the one for the main process. If that ever changes for | |
2917 | any reason, then take out the following clause and replace it | |
2918 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2919 | |
c3f6f71d JM |
2920 | if (pi->tid != 0) |
2921 | pi = find_procinfo_or_die (pi->pid, 0); | |
2922 | ||
2923 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 2924 | { |
0df8b418 | 2925 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
2926 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
2927 | break; | |
c906108c | 2928 | } |
c3f6f71d JM |
2929 | |
2930 | return retval; | |
c906108c SS |
2931 | } |
2932 | ||
c3f6f71d JM |
2933 | /* =================== END, Thread "MODULE" =================== */ |
2934 | ||
2935 | /* =================== END, /proc "MODULE" =================== */ | |
2936 | ||
2937 | /* =================== GDB "MODULE" =================== */ | |
2938 | ||
77382aee PA |
2939 | /* Here are all of the gdb target vector functions and their |
2940 | friends. */ | |
c3f6f71d | 2941 | |
39f77062 | 2942 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 2943 | static void do_detach (int signo); |
9185ddce | 2944 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 2945 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
2946 | |
2947 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
2948 | the startup phase. The following two variables are used to record | |
2949 | the address of the breakpoint, and the code that was replaced by | |
2950 | a breakpoint. */ | |
2951 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 2952 | static void *dbx_link_bpt; |
c3f6f71d | 2953 | |
77382aee PA |
2954 | /* Sets up the inferior to be debugged. Registers to trace signals, |
2955 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
2956 | may want to customize that. Returns zero for success (note! | |
2957 | unlike most functions in this module); on failure, returns the LINE | |
2958 | NUMBER where it failed! */ | |
c3f6f71d JM |
2959 | |
2960 | static int | |
fba45db2 | 2961 | procfs_debug_inferior (procinfo *pi) |
c906108c | 2962 | { |
c3f6f71d | 2963 | fltset_t traced_faults; |
37de36c6 KB |
2964 | gdb_sigset_t traced_signals; |
2965 | sysset_t *traced_syscall_entries; | |
2966 | sysset_t *traced_syscall_exits; | |
2967 | int status; | |
c906108c | 2968 | |
c3f6f71d JM |
2969 | #ifdef PROCFS_DONT_TRACE_FAULTS |
2970 | /* On some systems (OSF), we don't trace hardware faults. | |
2971 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
2972 | Wonder why we don't just do that in general? */ |
2973 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 2974 | #else |
0df8b418 MS |
2975 | /* Register to trace hardware faults in the child. */ |
2976 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 2977 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
2978 | #endif |
2979 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
2980 | return __LINE__; | |
c906108c | 2981 | |
2455069d UW |
2982 | /* Initially, register to trace all signals in the child. */ |
2983 | prfillset (&traced_signals); | |
2984 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
2985 | return __LINE__; |
2986 | ||
37de36c6 | 2987 | |
c3f6f71d | 2988 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
2989 | traced_syscall_entries = sysset_t_alloc (pi); |
2990 | gdb_premptysysset (traced_syscall_entries); | |
2991 | #ifdef SYS_exit | |
2992 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
2993 | #endif | |
c3f6f71d | 2994 | #ifdef SYS_lwpexit |
0df8b418 | 2995 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
2996 | #endif |
2997 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
2998 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
2999 | #endif | |
3000 | #ifdef DYNAMIC_SYSCALLS | |
3001 | { | |
3002 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 3003 | |
37de36c6 KB |
3004 | if (callnum >= 0) |
3005 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3006 | } | |
c906108c SS |
3007 | #endif |
3008 | ||
37de36c6 KB |
3009 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3010 | xfree (traced_syscall_entries); | |
3011 | if (!status) | |
c3f6f71d JM |
3012 | return __LINE__; |
3013 | ||
3014 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3015 | /* OSF method for tracing exec syscalls. Quoting: | |
3016 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3017 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 3018 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
3019 | { |
3020 | int prfs_flags; | |
3021 | ||
3022 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3023 | return __LINE__; | |
3024 | ||
3025 | prfs_flags |= PRFS_STOPEXEC; | |
3026 | ||
3027 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3028 | return __LINE__; | |
3029 | } | |
3030 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 3031 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
3032 | /* GW: Rationale... |
3033 | Not all systems with /proc have all the exec* syscalls with the same | |
3034 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 3035 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 3036 | |
37de36c6 KB |
3037 | traced_syscall_exits = sysset_t_alloc (pi); |
3038 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3039 | #ifdef SYS_exec |
37de36c6 | 3040 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3041 | #endif |
3042 | #ifdef SYS_execve | |
37de36c6 | 3043 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3044 | #endif |
3045 | #ifdef SYS_execv | |
37de36c6 | 3046 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3047 | #endif |
c5aa993b | 3048 | |
c3f6f71d | 3049 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3050 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3051 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3052 | #endif |
c5aa993b | 3053 | |
0df8b418 | 3054 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3055 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3056 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3057 | #endif |
c5aa993b | 3058 | |
37de36c6 KB |
3059 | #ifdef DYNAMIC_SYSCALLS |
3060 | { | |
3061 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3062 | |
37de36c6 KB |
3063 | if (callnum >= 0) |
3064 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3065 | callnum = find_syscall (pi, "ra_execve"); | |
3066 | if (callnum >= 0) | |
3067 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3068 | } | |
3069 | #endif | |
c906108c | 3070 | |
37de36c6 KB |
3071 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3072 | xfree (traced_syscall_exits); | |
3073 | if (!status) | |
c3f6f71d JM |
3074 | return __LINE__; |
3075 | ||
3076 | #endif /* PRFS_STOPEXEC */ | |
3077 | return 0; | |
c906108c SS |
3078 | } |
3079 | ||
19958708 | 3080 | static void |
136d6dae | 3081 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3082 | { |
c3f6f71d JM |
3083 | char *exec_file; |
3084 | int pid; | |
3085 | ||
74164c56 | 3086 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3087 | |
c3f6f71d | 3088 | if (pid == getpid ()) |
8a3fe4f8 | 3089 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3090 | |
c3f6f71d | 3091 | if (from_tty) |
c906108c | 3092 | { |
c3f6f71d JM |
3093 | exec_file = get_exec_file (0); |
3094 | ||
3095 | if (exec_file) | |
a3f17187 | 3096 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3097 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3098 | else |
a3f17187 | 3099 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3100 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3101 | |
3102 | fflush (stdout); | |
c906108c | 3103 | } |
39f77062 | 3104 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3105 | push_target (ops); |
c3f6f71d JM |
3106 | } |
3107 | ||
19958708 | 3108 | static void |
136d6dae | 3109 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3110 | { |
cc377e6b | 3111 | int sig = 0; |
7f9f62ba | 3112 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3113 | |
3114 | if (args) | |
3115 | sig = atoi (args); | |
c3f6f71d JM |
3116 | |
3117 | if (from_tty) | |
c906108c | 3118 | { |
cc377e6b MK |
3119 | char *exec_file; |
3120 | ||
c3f6f71d | 3121 | exec_file = get_exec_file (0); |
cc377e6b | 3122 | if (exec_file == NULL) |
c3f6f71d | 3123 | exec_file = ""; |
cc377e6b | 3124 | |
a3f17187 | 3125 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3126 | target_pid_to_str (pid_to_ptid (pid))); |
3127 | gdb_flush (gdb_stdout); | |
c906108c | 3128 | } |
19958708 | 3129 | |
cc377e6b MK |
3130 | do_detach (sig); |
3131 | ||
39f77062 | 3132 | inferior_ptid = null_ptid; |
7f9f62ba | 3133 | detach_inferior (pid); |
28439f5e | 3134 | unpush_target (ops); |
c906108c SS |
3135 | } |
3136 | ||
39f77062 KB |
3137 | static ptid_t |
3138 | do_attach (ptid_t ptid) | |
c906108c | 3139 | { |
c3f6f71d | 3140 | procinfo *pi; |
181e7f93 | 3141 | struct inferior *inf; |
c3f6f71d | 3142 | int fail; |
2689673f | 3143 | int lwpid; |
c3f6f71d | 3144 | |
39f77062 | 3145 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3146 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3147 | |
3148 | if (!open_procinfo_files (pi, FD_CTL)) | |
3149 | { | |
3150 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3151 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3152 | PIDGET (ptid)); |
c3f6f71d JM |
3153 | dead_procinfo (pi, errmsg, NOKILL); |
3154 | } | |
c906108c | 3155 | |
c3f6f71d JM |
3156 | /* Stop the process (if it isn't already stopped). */ |
3157 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3158 | { |
c3f6f71d JM |
3159 | pi->was_stopped = 1; |
3160 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3161 | } |
3162 | else | |
3163 | { | |
c3f6f71d JM |
3164 | pi->was_stopped = 0; |
3165 | /* Set the process to run again when we close it. */ | |
3166 | if (!proc_set_run_on_last_close (pi)) | |
3167 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3168 | ||
0df8b418 | 3169 | /* Now stop the process. */ |
c3f6f71d JM |
3170 | if (!proc_stop_process (pi)) |
3171 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3172 | pi->ignore_next_sigstop = 1; | |
c906108c | 3173 | } |
c3f6f71d JM |
3174 | /* Save some of the /proc state to be restored if we detach. */ |
3175 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3176 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3177 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3178 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3179 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3180 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3181 | NOKILL); | |
37de36c6 | 3182 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3183 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3184 | NOKILL); |
3185 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3186 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3187 | ||
3188 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3189 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3190 | ||
6c95b8df PA |
3191 | inf = current_inferior (); |
3192 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3193 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3194 | inf->attach_flag = 1; |
2689673f PA |
3195 | |
3196 | /* Create a procinfo for the current lwp. */ | |
3197 | lwpid = proc_get_current_thread (pi); | |
3198 | create_procinfo (pi->pid, lwpid); | |
3199 | ||
3200 | /* Add it to gdb's thread list. */ | |
3201 | ptid = MERGEPID (pi->pid, lwpid); | |
3202 | add_thread (ptid); | |
3203 | ||
3204 | return ptid; | |
c906108c SS |
3205 | } |
3206 | ||
3207 | static void | |
fba45db2 | 3208 | do_detach (int signo) |
c906108c | 3209 | { |
c3f6f71d | 3210 | procinfo *pi; |
c906108c | 3211 | |
0df8b418 | 3212 | /* Find procinfo for the main process. */ |
39f77062 | 3213 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3214 | if (signo) |
3215 | if (!proc_set_current_signal (pi, signo)) | |
3216 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3217 | |
c3f6f71d JM |
3218 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3219 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3220 | |
c3f6f71d JM |
3221 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3222 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3223 | ||
37de36c6 | 3224 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3225 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3226 | ||
37de36c6 | 3227 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3228 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3229 | ||
3230 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3231 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3232 | ||
3233 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3234 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3235 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3236 | { |
3237 | /* Clear any pending signal. */ | |
3238 | if (!proc_clear_current_fault (pi)) | |
3239 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3240 | ||
1a303dec MS |
3241 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3242 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3243 | ||
c3f6f71d JM |
3244 | if (!proc_set_run_on_last_close (pi)) |
3245 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3246 | } | |
3247 | ||
c3f6f71d | 3248 | destroy_procinfo (pi); |
c906108c SS |
3249 | } |
3250 | ||
772cf8be MK |
3251 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3252 | for all registers. | |
3253 | ||
3254 | ??? Is the following note still relevant? We can't get individual | |
3255 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3256 | don't bother with caching at all in that case. | |
3257 | ||
3258 | NOTE: Since the /proc interface cannot give us individual | |
3259 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3260 | This results in the possibility that we will do unnecessarily many | |
3261 | fetches, since we may be called repeatedly for individual | |
3262 | registers. So we cache the results, and mark the cache invalid | |
3263 | when the process is resumed. */ | |
c3f6f71d | 3264 | |
c906108c | 3265 | static void |
28439f5e PA |
3266 | procfs_fetch_registers (struct target_ops *ops, |
3267 | struct regcache *regcache, int regnum) | |
c906108c | 3268 | { |
772cf8be MK |
3269 | gdb_gregset_t *gregs; |
3270 | procinfo *pi; | |
3271 | int pid = PIDGET (inferior_ptid); | |
3272 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3273 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3274 | |
2689673f | 3275 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3276 | |
3277 | if (pi == NULL) | |
8a3fe4f8 | 3278 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3279 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3280 | |
772cf8be MK |
3281 | gregs = proc_get_gregs (pi); |
3282 | if (gregs == NULL) | |
c3f6f71d JM |
3283 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3284 | ||
56be3814 | 3285 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3286 | |
40a6adc1 | 3287 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3288 | { |
772cf8be MK |
3289 | gdb_fpregset_t *fpregs; |
3290 | ||
40a6adc1 MD |
3291 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3292 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3293 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3294 | return; /* Not a floating point register. */ |
c5aa993b | 3295 | |
772cf8be MK |
3296 | fpregs = proc_get_fpregs (pi); |
3297 | if (fpregs == NULL) | |
60054393 | 3298 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3299 | |
56be3814 | 3300 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3301 | } |
c906108c SS |
3302 | } |
3303 | ||
772cf8be MK |
3304 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3305 | this for all registers. | |
3306 | ||
3307 | NOTE: Since the /proc interface will not read individual registers, | |
3308 | we will cache these requests until the process is resumed, and only | |
3309 | then write them back to the inferior process. | |
77382aee | 3310 | |
772cf8be MK |
3311 | FIXME: is that a really bad idea? Have to think about cases where |
3312 | writing one register might affect the value of others, etc. */ | |
c906108c | 3313 | |
c3f6f71d | 3314 | static void |
28439f5e PA |
3315 | procfs_store_registers (struct target_ops *ops, |
3316 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3317 | { |
772cf8be MK |
3318 | gdb_gregset_t *gregs; |
3319 | procinfo *pi; | |
3320 | int pid = PIDGET (inferior_ptid); | |
3321 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3322 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3323 | |
2689673f | 3324 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3325 | |
3326 | if (pi == NULL) | |
8a3fe4f8 | 3327 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3328 | target_pid_to_str (inferior_ptid)); |
c906108c | 3329 | |
772cf8be MK |
3330 | gregs = proc_get_gregs (pi); |
3331 | if (gregs == NULL) | |
c3f6f71d | 3332 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3333 | |
56be3814 | 3334 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3335 | if (!proc_set_gregs (pi)) |
3336 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3337 | |
40a6adc1 | 3338 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3339 | { |
772cf8be MK |
3340 | gdb_fpregset_t *fpregs; |
3341 | ||
40a6adc1 MD |
3342 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3343 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3344 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3345 | return; /* Not a floating point register. */ |
60054393 | 3346 | |
772cf8be MK |
3347 | fpregs = proc_get_fpregs (pi); |
3348 | if (fpregs == NULL) | |
60054393 MS |
3349 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3350 | ||
56be3814 | 3351 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3352 | if (!proc_set_fpregs (pi)) |
3353 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3354 | } | |
c3f6f71d | 3355 | } |
c906108c | 3356 | |
37de36c6 KB |
3357 | static int |
3358 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3359 | { | |
37de36c6 KB |
3360 | #ifdef SYS_lwp_exit |
3361 | if (scall == SYS_lwp_exit) | |
3362 | return 1; | |
3363 | #endif | |
3364 | #ifdef SYS_lwpexit | |
3365 | if (scall == SYS_lwpexit) | |
3366 | return 1; | |
3367 | #endif | |
3368 | return 0; | |
3369 | } | |
3370 | ||
3371 | static int | |
3372 | syscall_is_exit (procinfo *pi, int scall) | |
3373 | { | |
3374 | #ifdef SYS_exit | |
3375 | if (scall == SYS_exit) | |
3376 | return 1; | |
3377 | #endif | |
3378 | #ifdef DYNAMIC_SYSCALLS | |
3379 | if (find_syscall (pi, "_exit") == scall) | |
3380 | return 1; | |
3381 | #endif | |
3382 | return 0; | |
3383 | } | |
3384 | ||
3385 | static int | |
3386 | syscall_is_exec (procinfo *pi, int scall) | |
3387 | { | |
3388 | #ifdef SYS_exec | |
3389 | if (scall == SYS_exec) | |
3390 | return 1; | |
3391 | #endif | |
3392 | #ifdef SYS_execv | |
3393 | if (scall == SYS_execv) | |
3394 | return 1; | |
3395 | #endif | |
3396 | #ifdef SYS_execve | |
3397 | if (scall == SYS_execve) | |
3398 | return 1; | |
3399 | #endif | |
3400 | #ifdef DYNAMIC_SYSCALLS | |
3401 | if (find_syscall (pi, "_execve")) | |
3402 | return 1; | |
3403 | if (find_syscall (pi, "ra_execve")) | |
3404 | return 1; | |
3405 | #endif | |
3406 | return 0; | |
3407 | } | |
3408 | ||
3409 | static int | |
3410 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3411 | { | |
3412 | #ifdef SYS_lwp_create | |
3413 | if (scall == SYS_lwp_create) | |
3414 | return 1; | |
3415 | #endif | |
3416 | #ifdef SYS_lwpcreate | |
3417 | if (scall == SYS_lwpcreate) | |
3418 | return 1; | |
3419 | #endif | |
3420 | return 0; | |
3421 | } | |
3422 | ||
7434dadd JB |
3423 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3424 | Does nothing if the breakpoint hasn't been inserted or has already | |
3425 | been removed. */ | |
3426 | ||
3427 | static void | |
3428 | remove_dbx_link_breakpoint (void) | |
3429 | { | |
3430 | if (dbx_link_bpt_addr == 0) | |
3431 | return; | |
3432 | ||
3433 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3434 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3435 | ||
3436 | dbx_link_bpt_addr = 0; | |
3437 | dbx_link_bpt = NULL; | |
3438 | } | |
3439 | ||
3440 | #ifdef SYS_syssgi | |
3441 | /* Return the address of the __dbx_link() function in the file | |
3442 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3443 | the symbol was not found. */ | |
3444 | ||
3445 | static CORE_ADDR | |
3446 | dbx_link_addr (bfd *abfd) | |
3447 | { | |
3448 | long storage_needed; | |
3449 | asymbol **symbol_table; | |
3450 | long number_of_symbols; | |
3451 | long i; | |
3452 | ||
3453 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3454 | if (storage_needed <= 0) | |
3455 | return 0; | |
3456 | ||
3457 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3458 | make_cleanup (xfree, symbol_table); | |
3459 | ||
3460 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3461 | ||
3462 | for (i = 0; i < number_of_symbols; i++) | |
3463 | { | |
3464 | asymbol *sym = symbol_table[i]; | |
3465 | ||
3466 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3467 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3468 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3469 | } |
3470 | ||
3471 | /* Symbol not found, return NULL. */ | |
3472 | return 0; | |
3473 | } | |
3474 | ||
3475 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3476 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3477 | and return nonzero. Return zero otherwise. */ |
3478 | ||
3479 | static int | |
3480 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3481 | { | |
3482 | bfd *abfd; | |
3483 | long storage_needed; | |
3484 | CORE_ADDR sym_addr; | |
3485 | ||
64c31149 | 3486 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
7434dadd JB |
3487 | if (abfd == NULL) |
3488 | { | |
3489 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3490 | return 0; | |
3491 | } | |
3492 | ||
3493 | if (!bfd_check_format (abfd, bfd_object)) | |
3494 | { | |
3495 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3496 | symbol in it. */ |
cbb099e8 | 3497 | gdb_bfd_unref (abfd); |
7434dadd JB |
3498 | return 0; |
3499 | } | |
3500 | ||
3501 | sym_addr = dbx_link_addr (abfd); | |
3502 | if (sym_addr != 0) | |
3503 | { | |
3504 | /* Insert the breakpoint. */ | |
3505 | dbx_link_bpt_addr = sym_addr; | |
3506 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
3507 | sym_addr); | |
3508 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3509 | { |
3510 | warning (_("Failed to insert dbx_link breakpoint.")); | |
cbb099e8 | 3511 | gdb_bfd_unref (abfd); |
77382aee PA |
3512 | return 0; |
3513 | } | |
cbb099e8 | 3514 | gdb_bfd_unref (abfd); |
7434dadd JB |
3515 | return 1; |
3516 | } | |
3517 | ||
cbb099e8 | 3518 | gdb_bfd_unref (abfd); |
7434dadd JB |
3519 | return 0; |
3520 | } | |
3521 | ||
e294797a | 3522 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3523 | space in the process. The callback function receives an open file |
3524 | descriptor for the file corresponding to that mapped address space | |
3525 | (if there is one), and the base address of the mapped space. Quit | |
3526 | when the callback function returns a nonzero value, or at teh end | |
3527 | of the mappings. Returns the first non-zero return value of the | |
3528 | callback function, or zero. */ | |
e294797a JB |
3529 | |
3530 | static int | |
3531 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3532 | void *data) | |
3533 | { | |
3534 | procinfo *pi = data; | |
3535 | int fd; | |
3536 | ||
3537 | #ifdef NEW_PROC_API | |
3538 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3539 | ||
3540 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3541 | return -1; /* sanity */ | |
3542 | ||
3543 | if (map->pr_mapname[0] == 0) | |
3544 | { | |
3545 | fd = -1; /* no map file */ | |
3546 | } | |
3547 | else | |
3548 | { | |
3549 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3550 | /* Note: caller's responsibility to close this fd! */ | |
3551 | fd = open_with_retry (name, O_RDONLY); | |
3552 | /* Note: we don't test the above call for failure; | |
3553 | we just pass the FD on as given. Sometimes there is | |
3554 | no file, so the open may return failure, but that's | |
3555 | not a problem. */ | |
3556 | } | |
3557 | #else | |
3558 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3559 | /* Note: we don't test the above call for failure; | |
3560 | we just pass the FD on as given. Sometimes there is | |
3561 | no file, so the ioctl may return failure, but that's | |
3562 | not a problem. */ | |
3563 | #endif | |
3564 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3565 | } | |
3566 | ||
7434dadd JB |
3567 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3568 | insert a breakpoint at this location and return nonzero. Return | |
3569 | zero otherwise. */ | |
3570 | ||
3571 | static int | |
3572 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3573 | find_memory_region_ftype child_func, |
77382aee | 3574 | void *data) |
7434dadd JB |
3575 | { |
3576 | procinfo *pi = (procinfo *) data; | |
3577 | ||
3578 | /* We know the symbol we're looking for is in a text region, so | |
3579 | only look for it if the region is a text one. */ | |
3580 | if (map->pr_mflags & MA_EXEC) | |
3581 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3582 | ||
3583 | return 0; | |
3584 | } | |
3585 | ||
3586 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3587 | insert a breakpoint at its location, and return nonzero. Return zero | |
3588 | otherwise. */ | |
3589 | ||
3590 | static int | |
3591 | insert_dbx_link_breakpoint (procinfo *pi) | |
3592 | { | |
3593 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3594 | } | |
3595 | #endif | |
3596 | ||
77382aee PA |
3597 | /* Retrieve the next stop event from the child process. If child has |
3598 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3599 | (or possibly wait eventcodes) into gdb internal event codes. | |
3600 | Returns the id of process (and possibly thread) that incurred the | |
3601 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3602 | |
39f77062 | 3603 | static ptid_t |
117de6a9 | 3604 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3605 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3606 | { |
0df8b418 | 3607 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3608 | procinfo *pi; |
39f77062 KB |
3609 | int wstat; |
3610 | int temp_tid; | |
3611 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3612 | int why, what, flags; |
3613 | int retry = 0; | |
c906108c | 3614 | |
c3f6f71d | 3615 | wait_again: |
c906108c | 3616 | |
c3f6f71d JM |
3617 | retry++; |
3618 | wstat = 0; | |
39f77062 | 3619 | retval = pid_to_ptid (-1); |
c906108c | 3620 | |
0df8b418 | 3621 | /* Find procinfo for main process. */ |
39f77062 | 3622 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 3623 | if (pi) |
c906108c | 3624 | { |
0df8b418 | 3625 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3626 | pi->status_valid = 0; |
3627 | pi->gregs_valid = 0; | |
3628 | pi->fpregs_valid = 0; | |
3629 | ||
0df8b418 | 3630 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3631 | flags = proc_flags (pi); |
3632 | why = proc_why (pi); | |
3633 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3634 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3635 | #endif |
3636 | /* If child is not stopped, wait for it to stop. */ | |
3637 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3638 | !proc_wait_for_stop (pi)) | |
c906108c | 3639 | { |
0df8b418 | 3640 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3641 | if (errno == ENOENT) |
c906108c | 3642 | { |
39f77062 KB |
3643 | int wait_retval; |
3644 | ||
0df8b418 MS |
3645 | /* /proc file not found; presumably child has terminated. */ |
3646 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3647 | |
0df8b418 | 3648 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
3e43a32a MS |
3649 | error (_("procfs: couldn't stop " |
3650 | "process %d: wait returned %d."), | |
39f77062 | 3651 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d | 3652 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3653 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3654 | retval = pid_to_ptid (wait_retval); |
c906108c | 3655 | } |
d1566ff5 FN |
3656 | else if (errno == EINTR) |
3657 | goto wait_again; | |
c3f6f71d | 3658 | else |
c906108c | 3659 | { |
0df8b418 | 3660 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3661 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3662 | } |
c3f6f71d JM |
3663 | } |
3664 | else | |
3665 | { | |
3666 | /* This long block is reached if either: | |
3667 | a) the child was already stopped, or | |
3668 | b) we successfully waited for the child with wait_for_stop. | |
3669 | This block will analyze the /proc status, and translate it | |
3670 | into a waitstatus for GDB. | |
3671 | ||
3672 | If we actually had to call wait because the /proc file | |
19958708 | 3673 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3674 | because we already have a waitstatus. */ |
3675 | ||
3676 | flags = proc_flags (pi); | |
3677 | why = proc_why (pi); | |
3678 | what = proc_what (pi); | |
3679 | ||
c3f6f71d | 3680 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3681 | { |
c3f6f71d JM |
3682 | #ifdef PR_ASYNC |
3683 | /* If it's running async (for single_thread control), | |
3684 | set it back to normal again. */ | |
3685 | if (flags & PR_ASYNC) | |
3686 | if (!proc_unset_async (pi)) | |
3687 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3688 | #endif | |
3689 | ||
3690 | if (info_verbose) | |
3691 | proc_prettyprint_why (why, what, 1); | |
3692 | ||
3693 | /* The 'pid' we will return to GDB is composed of | |
3694 | the process ID plus the lwp ID. */ | |
3695 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
3696 | ||
3697 | switch (why) { | |
3698 | case PR_SIGNALLED: | |
3699 | wstat = (what << 8) | 0177; | |
3700 | break; | |
3701 | case PR_SYSENTRY: | |
37de36c6 | 3702 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3703 | { |
17faa917 DJ |
3704 | if (print_thread_events) |
3705 | printf_unfiltered (_("[%s exited]\n"), | |
3706 | target_pid_to_str (retval)); | |
37de36c6 KB |
3707 | delete_thread (retval); |
3708 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3709 | return retval; | |
3710 | } | |
3711 | else if (syscall_is_exit (pi, what)) | |
3712 | { | |
181e7f93 PA |
3713 | struct inferior *inf; |
3714 | ||
0df8b418 | 3715 | /* Handle SYS_exit call only. */ |
37de36c6 | 3716 | /* Stopped at entry to SYS_exit. |
19958708 | 3717 | Make it runnable, resume it, then use |
37de36c6 | 3718 | the wait system call to get its exit code. |
19958708 | 3719 | Proc_run_process always clears the current |
37de36c6 KB |
3720 | fault and signal. |
3721 | Then return its exit status. */ | |
3722 | pi->status_valid = 0; | |
3723 | wstat = 0; | |
19958708 | 3724 | /* FIXME: what we should do is return |
37de36c6 KB |
3725 | TARGET_WAITKIND_SPURIOUS. */ |
3726 | if (!proc_run_process (pi, 0, 0)) | |
3727 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3728 | |
3729 | inf = find_inferior_pid (pi->pid); | |
3730 | if (inf->attach_flag) | |
c3f6f71d | 3731 | { |
19958708 | 3732 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3733 | return a "success" exit code. Bogus: what if |
3734 | it returns something else? */ | |
3735 | wstat = 0; | |
39f77062 | 3736 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3737 | } |
3738 | else | |
3739 | { | |
3740 | int temp = wait (&wstat); | |
3741 | ||
3742 | /* FIXME: shouldn't I make sure I get the right | |
3743 | event from the right process? If (for | |
3744 | instance) I have killed an earlier inferior | |
3745 | process but failed to clean up after it | |
3746 | somehow, I could get its termination event | |
3747 | here. */ | |
3748 | ||
0df8b418 MS |
3749 | /* If wait returns -1, that's what we return |
3750 | to GDB. */ | |
37de36c6 | 3751 | if (temp < 0) |
39f77062 | 3752 | retval = pid_to_ptid (temp); |
c3f6f71d | 3753 | } |
c3f6f71d | 3754 | } |
37de36c6 KB |
3755 | else |
3756 | { | |
a3f17187 | 3757 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3758 | proc_prettyprint_syscall (proc_what (pi), 0); |
3759 | printf_filtered ("\n"); | |
3760 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3761 | { |
37de36c6 | 3762 | long i, nsysargs, *sysargs; |
c3f6f71d | 3763 | |
37de36c6 KB |
3764 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3765 | (sysargs = proc_sysargs (pi)) != NULL) | |
3766 | { | |
3e43a32a MS |
3767 | printf_filtered (_("%ld syscall arguments:\n"), |
3768 | nsysargs); | |
37de36c6 | 3769 | for (i = 0; i < nsysargs; i++) |
19958708 | 3770 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3771 | i, sysargs[i]); |
3772 | } | |
c3f6f71d | 3773 | |
c3f6f71d | 3774 | } |
c3f6f71d | 3775 | #endif |
37de36c6 KB |
3776 | if (status) |
3777 | { | |
0df8b418 MS |
3778 | /* How to exit gracefully, returning "unknown |
3779 | event". */ | |
37de36c6 | 3780 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3781 | return inferior_ptid; |
37de36c6 KB |
3782 | } |
3783 | else | |
3784 | { | |
3785 | /* How to keep going without returning to wfi: */ | |
a493e3e2 | 3786 | target_resume (ptid, 0, GDB_SIGNAL_0); |
37de36c6 KB |
3787 | goto wait_again; |
3788 | } | |
3789 | } | |
3790 | break; | |
3791 | case PR_SYSEXIT: | |
3792 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3793 | { |
37de36c6 KB |
3794 | /* Hopefully this is our own "fork-child" execing |
3795 | the real child. Hoax this event into a trap, and | |
3796 | GDB will see the child about to execute its start | |
0df8b418 | 3797 | address. */ |
37de36c6 KB |
3798 | wstat = (SIGTRAP << 8) | 0177; |
3799 | } | |
9185ddce | 3800 | #ifdef SYS_syssgi |
77382aee PA |
3801 | else if (what == SYS_syssgi) |
3802 | { | |
3803 | /* see if we can break on dbx_link(). If yes, then | |
3804 | we no longer need the SYS_syssgi notifications. */ | |
3805 | if (insert_dbx_link_breakpoint (pi)) | |
3806 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
3807 | FLAG_RESET, 0); | |
3808 | ||
3809 | /* This is an internal event and should be transparent | |
3810 | to wfi, so resume the execution and wait again. See | |
3811 | comment in procfs_init_inferior() for more details. */ | |
a493e3e2 | 3812 | target_resume (ptid, 0, GDB_SIGNAL_0); |
77382aee PA |
3813 | goto wait_again; |
3814 | } | |
9185ddce | 3815 | #endif |
37de36c6 KB |
3816 | else if (syscall_is_lwp_create (pi, what)) |
3817 | { | |
77382aee PA |
3818 | /* This syscall is somewhat like fork/exec. We |
3819 | will get the event twice: once for the parent | |
3820 | LWP, and once for the child. We should already | |
3821 | know about the parent LWP, but the child will | |
3822 | be new to us. So, whenever we get this event, | |
3823 | if it represents a new thread, simply add the | |
3824 | thread to the list. */ | |
c3f6f71d | 3825 | |
37de36c6 | 3826 | /* If not in procinfo list, add it. */ |
39f77062 KB |
3827 | temp_tid = proc_get_current_thread (pi); |
3828 | if (!find_procinfo (pi->pid, temp_tid)) | |
3829 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 3830 | |
39f77062 | 3831 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 3832 | /* If not in GDB's thread list, add it. */ |
39f77062 | 3833 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
3834 | add_thread (temp_ptid); |
3835 | ||
0df8b418 | 3836 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 3837 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3838 | return inferior_ptid; |
37de36c6 KB |
3839 | } |
3840 | else if (syscall_is_lwp_exit (pi, what)) | |
3841 | { | |
17faa917 DJ |
3842 | if (print_thread_events) |
3843 | printf_unfiltered (_("[%s exited]\n"), | |
3844 | target_pid_to_str (retval)); | |
37de36c6 KB |
3845 | delete_thread (retval); |
3846 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3847 | return retval; | |
c3f6f71d | 3848 | } |
37de36c6 KB |
3849 | else if (0) |
3850 | { | |
3851 | /* FIXME: Do we need to handle SYS_sproc, | |
3852 | SYS_fork, or SYS_vfork here? The old procfs | |
3853 | seemed to use this event to handle threads on | |
3854 | older (non-LWP) systems, where I'm assuming | |
19958708 | 3855 | that threads were actually separate processes. |
37de36c6 KB |
3856 | Irix, maybe? Anyway, low priority for now. */ |
3857 | } | |
3858 | else | |
3859 | { | |
a3f17187 | 3860 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
3861 | proc_prettyprint_syscall (proc_what (pi), 0); |
3862 | printf_filtered ("\n"); | |
3863 | #ifndef PIOCSSPCACT | |
3864 | { | |
3865 | long i, nsysargs, *sysargs; | |
3866 | ||
3867 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3868 | (sysargs = proc_sysargs (pi)) != NULL) | |
3869 | { | |
77382aee PA |
3870 | printf_filtered (_("%ld syscall arguments:\n"), |
3871 | nsysargs); | |
37de36c6 | 3872 | for (i = 0; i < nsysargs; i++) |
19958708 | 3873 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3874 | i, sysargs[i]); |
3875 | } | |
3876 | } | |
c3f6f71d | 3877 | #endif |
37de36c6 | 3878 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3879 | return inferior_ptid; |
37de36c6 | 3880 | } |
c3f6f71d JM |
3881 | break; |
3882 | case PR_REQUESTED: | |
3883 | #if 0 /* FIXME */ | |
3884 | wstat = (SIGSTOP << 8) | 0177; | |
3885 | break; | |
3886 | #else | |
3887 | if (retry < 5) | |
3888 | { | |
a3f17187 | 3889 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
3890 | pi->status_valid = 0; |
3891 | goto wait_again; | |
3892 | } | |
3893 | else | |
3894 | { | |
3895 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
3896 | temp_tid = proc_get_current_thread (pi); |
3897 | if (!find_procinfo (pi->pid, temp_tid)) | |
3898 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
3899 | |
3900 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
3901 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
3902 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 3903 | add_thread (temp_ptid); |
c3f6f71d JM |
3904 | |
3905 | status->kind = TARGET_WAITKIND_STOPPED; | |
3906 | status->value.sig = 0; | |
3907 | return retval; | |
3908 | } | |
3909 | #endif | |
3910 | case PR_JOBCONTROL: | |
3911 | wstat = (what << 8) | 0177; | |
3912 | break; | |
3913 | case PR_FAULTED: | |
7af6341f | 3914 | switch (what) { |
c3f6f71d JM |
3915 | #ifdef FLTWATCH |
3916 | case FLTWATCH: | |
3917 | wstat = (SIGTRAP << 8) | 0177; | |
3918 | break; | |
3919 | #endif | |
3920 | #ifdef FLTKWATCH | |
3921 | case FLTKWATCH: | |
3922 | wstat = (SIGTRAP << 8) | 0177; | |
3923 | break; | |
3924 | #endif | |
0df8b418 | 3925 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 3926 | case FLTPRIV: |
0df8b418 | 3927 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3928 | case FLTILL: |
3929 | #endif | |
3930 | wstat = (SIGILL << 8) | 0177; | |
3931 | break; | |
3932 | case FLTBPT: | |
0df8b418 | 3933 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3934 | case FLTTRACE: |
3935 | #endif | |
77382aee PA |
3936 | /* If we hit our __dbx_link() internal breakpoint, |
3937 | then remove it. See comments in procfs_init_inferior() | |
3938 | for more details. */ | |
3939 | if (dbx_link_bpt_addr != 0 | |
3940 | && dbx_link_bpt_addr | |
fb14de7b | 3941 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 3942 | remove_dbx_link_breakpoint (); |
9185ddce | 3943 | |
c3f6f71d JM |
3944 | wstat = (SIGTRAP << 8) | 0177; |
3945 | break; | |
3946 | case FLTSTACK: | |
3947 | case FLTACCESS: | |
0df8b418 | 3948 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3949 | case FLTBOUNDS: |
3950 | #endif | |
3951 | wstat = (SIGSEGV << 8) | 0177; | |
3952 | break; | |
3953 | case FLTIOVF: | |
3954 | case FLTIZDIV: | |
0df8b418 | 3955 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3956 | case FLTFPE: |
3957 | #endif | |
3958 | wstat = (SIGFPE << 8) | 0177; | |
3959 | break; | |
3e43a32a | 3960 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
3961 | default: /* FIXME: use si_signo if possible for |
3962 | fault. */ | |
39f77062 | 3963 | retval = pid_to_ptid (-1); |
c3f6f71d | 3964 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 3965 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3966 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3967 | error (_("... giving up...")); |
c3f6f71d JM |
3968 | break; |
3969 | } | |
3970 | break; /* case PR_FAULTED: */ | |
3971 | default: /* switch (why) unmatched */ | |
3972 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 3973 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3974 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3975 | error (_("... giving up...")); |
c3f6f71d JM |
3976 | break; |
3977 | } | |
77382aee PA |
3978 | /* Got this far without error: If retval isn't in the |
3979 | threads database, add it. */ | |
39f77062 KB |
3980 | if (PIDGET (retval) > 0 && |
3981 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 3982 | !in_thread_list (retval)) |
c906108c | 3983 | { |
77382aee PA |
3984 | /* We have a new thread. We need to add it both to |
3985 | GDB's list and to our own. If we don't create a | |
3986 | procinfo, resume may be unhappy later. */ | |
c3f6f71d JM |
3987 | add_thread (retval); |
3988 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
3989 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 3990 | } |
c906108c | 3991 | } |
0df8b418 | 3992 | else /* Flags do not indicate STOPPED. */ |
c906108c | 3993 | { |
0df8b418 | 3994 | /* surely this can't happen... */ |
c3f6f71d JM |
3995 | printf_filtered ("procfs:%d -- process not stopped.\n", |
3996 | __LINE__); | |
3997 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 3998 | error (_("procfs: ...giving up...")); |
c906108c | 3999 | } |
c906108c | 4000 | } |
c906108c | 4001 | |
c3f6f71d JM |
4002 | if (status) |
4003 | store_waitstatus (status, wstat); | |
c906108c SS |
4004 | } |
4005 | ||
c3f6f71d JM |
4006 | return retval; |
4007 | } | |
c906108c | 4008 | |
4e73f23d RM |
4009 | /* Perform a partial transfer to/from the specified object. For |
4010 | memory transfers, fall back to the old memory xfer functions. */ | |
4011 | ||
4012 | static LONGEST | |
4013 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4014 | const char *annex, gdb_byte *readbuf, |
4015 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4016 | { |
4017 | switch (object) | |
4018 | { | |
4019 | case TARGET_OBJECT_MEMORY: | |
4020 | if (readbuf) | |
0b62613e PA |
4021 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4022 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4023 | if (writebuf) |
0b62613e PA |
4024 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4025 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4026 | return -1; |
4027 | ||
4028 | #ifdef NEW_PROC_API | |
4029 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4030 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4031 | offset, len); |
4032 | #endif | |
4033 | ||
4034 | default: | |
4035 | if (ops->beneath != NULL) | |
4036 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4037 | readbuf, writebuf, offset, len); | |
4038 | return -1; | |
4039 | } | |
4040 | } | |
4041 | ||
4042 | ||
d0849a9a KB |
4043 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4044 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4045 | otherwise transfer them from the target. TARGET is unused. | |
4046 | ||
4047 | The return value is 0 if an error occurred or no bytes were | |
4048 | transferred. Otherwise, it will be a positive value which | |
4049 | indicates the number of bytes transferred between gdb and the | |
4050 | target. (Note that the interface also makes provisions for | |
0df8b418 | 4051 | negative values, but this capability isn't implemented here.) */ |
d0849a9a | 4052 | |
c3f6f71d | 4053 | static int |
0b62613e | 4054 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4055 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4056 | { |
4057 | procinfo *pi; | |
4058 | int nbytes = 0; | |
c906108c | 4059 | |
0df8b418 | 4060 | /* Find procinfo for main process. */ |
39f77062 | 4061 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4062 | if (pi->as_fd == 0 && |
4063 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4064 | { |
c3f6f71d JM |
4065 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4066 | return 0; | |
c906108c | 4067 | } |
c906108c | 4068 | |
c3f6f71d | 4069 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4070 | { |
c3f6f71d | 4071 | if (dowrite) |
c906108c | 4072 | { |
c3f6f71d | 4073 | #ifdef NEW_PROC_API |
cce7e648 | 4074 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4075 | #else |
cce7e648 | 4076 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4077 | #endif |
c3f6f71d | 4078 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4079 | } |
c3f6f71d | 4080 | else |
c906108c | 4081 | { |
cce7e648 | 4082 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4083 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4084 | } |
c3f6f71d | 4085 | if (nbytes < 0) |
c906108c | 4086 | { |
c3f6f71d | 4087 | nbytes = 0; |
c906108c | 4088 | } |
c906108c | 4089 | } |
c3f6f71d | 4090 | return nbytes; |
c906108c SS |
4091 | } |
4092 | ||
77382aee PA |
4093 | /* Called by target_resume before making child runnable. Mark cached |
4094 | registers and status's invalid. If there are "dirty" caches that | |
4095 | need to be written back to the child process, do that. | |
c906108c | 4096 | |
77382aee PA |
4097 | File descriptors are also cached. As they are a limited resource, |
4098 | we cannot hold onto them indefinitely. However, as they are | |
4099 | expensive to open, we don't want to throw them away | |
4100 | indescriminately either. As a compromise, we will keep the file | |
4101 | descriptors for the parent process, but discard any file | |
4102 | descriptors we may have accumulated for the threads. | |
4103 | ||
4104 | As this function is called by iterate_over_threads, it always | |
4105 | returns zero (so that iterate_over_threads will keep | |
4106 | iterating). */ | |
c3f6f71d JM |
4107 | |
4108 | static int | |
fba45db2 | 4109 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4110 | { |
77382aee PA |
4111 | /* About to run the child; invalidate caches and do any other |
4112 | cleanup. */ | |
c906108c | 4113 | |
c3f6f71d JM |
4114 | #if 0 |
4115 | if (pi->gregs_dirty) | |
4116 | if (parent == NULL || | |
4117 | proc_get_current_thread (parent) != pi->tid) | |
4118 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4119 | proc_warn (pi, "target_resume, set_gregs", | |
4120 | __LINE__); | |
a97b0ac8 | 4121 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4122 | if (pi->fpregs_dirty) |
4123 | if (parent == NULL || | |
4124 | proc_get_current_thread (parent) != pi->tid) | |
4125 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4126 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4127 | __LINE__); |
c906108c | 4128 | #endif |
c906108c | 4129 | |
c3f6f71d | 4130 | if (parent != NULL) |
c906108c | 4131 | { |
c3f6f71d | 4132 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4133 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4134 | We don't do this to the master (parent) procinfo. */ |
4135 | ||
4136 | close_procinfo_files (pi); | |
c906108c | 4137 | } |
c3f6f71d JM |
4138 | pi->gregs_valid = 0; |
4139 | pi->fpregs_valid = 0; | |
4140 | #if 0 | |
4141 | pi->gregs_dirty = 0; | |
4142 | pi->fpregs_dirty = 0; | |
c906108c | 4143 | #endif |
c3f6f71d JM |
4144 | pi->status_valid = 0; |
4145 | pi->threads_valid = 0; | |
c906108c | 4146 | |
c3f6f71d | 4147 | return 0; |
c906108c SS |
4148 | } |
4149 | ||
0fda6bd2 | 4150 | #if 0 |
77382aee PA |
4151 | /* A callback function for iterate_over_threads. Find the |
4152 | asynchronous signal thread, and make it runnable. See if that | |
4153 | helps matters any. */ | |
c906108c | 4154 | |
c3f6f71d | 4155 | static int |
fba45db2 | 4156 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4157 | { |
c3f6f71d JM |
4158 | #ifdef PR_ASLWP |
4159 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4160 | { |
c3f6f71d JM |
4161 | if (!proc_run_process (pi, 0, -1)) |
4162 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4163 | return 1; | |
c906108c | 4164 | } |
c906108c | 4165 | #endif |
c3f6f71d | 4166 | return 0; |
c906108c | 4167 | } |
0fda6bd2 | 4168 | #endif |
c906108c | 4169 | |
77382aee PA |
4170 | /* Make the child process runnable. Normally we will then call |
4171 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4172 | ||
4173 | If STEP is true, then arrange for the child to stop again after | |
4174 | executing a single instruction. If SIGNO is zero, then cancel any | |
4175 | pending signal; if non-zero, then arrange for the indicated signal | |
4176 | to be delivered to the child when it runs. If PID is -1, then | |
4177 | allow any child thread to run; if non-zero, then allow only the | |
4178 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4179 | |
4180 | static void | |
28439f5e | 4181 | procfs_resume (struct target_ops *ops, |
2ea28649 | 4182 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 4183 | { |
c3f6f71d JM |
4184 | procinfo *pi, *thread; |
4185 | int native_signo; | |
4186 | ||
19958708 | 4187 | /* 2.1: |
c3f6f71d | 4188 | prrun.prflags |= PRSVADDR; |
19958708 | 4189 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4190 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4191 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4192 | prrun.prflags |= PRCFAULT; clear current fault. |
4193 | ||
4194 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4195 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4196 | PRSVADDR is unnecessary. |
4197 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4198 | This basically leaves PRSTEP and PRCSIG. | |
4199 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4200 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4201 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4202 | |
0df8b418 | 4203 | /* Find procinfo for main process. */ |
39f77062 | 4204 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4205 | |
77382aee | 4206 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4207 | errno = 0; |
c906108c | 4208 | |
c3f6f71d JM |
4209 | /* Convert signal to host numbering. */ |
4210 | if (signo == 0 || | |
a493e3e2 | 4211 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4212 | native_signo = 0; |
4213 | else | |
2ea28649 | 4214 | native_signo = gdb_signal_to_host (signo); |
c906108c | 4215 | |
c3f6f71d | 4216 | pi->ignore_next_sigstop = 0; |
c906108c | 4217 | |
77382aee PA |
4218 | /* Running the process voids all cached registers and status. */ |
4219 | /* Void the threads' caches first. */ | |
19958708 | 4220 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4221 | /* Void the process procinfo's caches. */ |
4222 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4223 | |
39f77062 | 4224 | if (PIDGET (ptid) != -1) |
c906108c | 4225 | { |
77382aee PA |
4226 | /* Resume a specific thread, presumably suppressing the |
4227 | others. */ | |
39f77062 | 4228 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4229 | if (thread != NULL) |
c906108c | 4230 | { |
c3f6f71d JM |
4231 | if (thread->tid != 0) |
4232 | { | |
77382aee PA |
4233 | /* We're to resume a specific thread, and not the |
4234 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4235 | #ifdef PR_ASYNC |
4236 | if (!proc_set_async (pi)) | |
4237 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4238 | #endif | |
4239 | #if 0 | |
19958708 | 4240 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4241 | make_signal_thread_runnable, |
4242 | NULL); | |
4243 | #endif | |
0df8b418 MS |
4244 | pi = thread; /* Substitute the thread's procinfo |
4245 | for run. */ | |
c3f6f71d | 4246 | } |
c906108c SS |
4247 | } |
4248 | } | |
c906108c | 4249 | |
c3f6f71d | 4250 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4251 | { |
c3f6f71d | 4252 | if (errno == EBUSY) |
77382aee PA |
4253 | warning (_("resume: target already running. " |
4254 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4255 | else |
4256 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4257 | } |
c3f6f71d | 4258 | } |
c906108c | 4259 | |
77382aee | 4260 | /* Set up to trace signals in the child process. */ |
c906108c | 4261 | |
c3f6f71d | 4262 | static void |
2455069d | 4263 | procfs_pass_signals (int numsigs, unsigned char *pass_signals) |
c3f6f71d | 4264 | { |
37de36c6 | 4265 | gdb_sigset_t signals; |
2455069d UW |
4266 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
4267 | int signo; | |
c906108c | 4268 | |
2455069d UW |
4269 | prfillset (&signals); |
4270 | ||
4271 | for (signo = 0; signo < NSIG; signo++) | |
4272 | { | |
2ea28649 | 4273 | int target_signo = gdb_signal_from_host (signo); |
2455069d UW |
4274 | if (target_signo < numsigs && pass_signals[target_signo]) |
4275 | gdb_prdelset (&signals, signo); | |
4276 | } | |
4277 | ||
4278 | if (!proc_set_traced_signals (pi, &signals)) | |
4279 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4280 | } |
c906108c | 4281 | |
77382aee | 4282 | /* Print status information about the child process. */ |
c906108c | 4283 | |
c3f6f71d | 4284 | static void |
fba45db2 | 4285 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4286 | { |
181e7f93 | 4287 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4288 | |
a3f17187 | 4289 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4290 | inf->attach_flag? "attached": "child", |
39f77062 | 4291 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4292 | } |
c906108c | 4293 | |
77382aee PA |
4294 | /* Stop the child process asynchronously, as when the gdb user types |
4295 | control-c or presses a "stop" button. Works by sending | |
4296 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4297 | |
c3f6f71d | 4298 | static void |
f9c72d52 | 4299 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4300 | { |
7e1789f5 | 4301 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4302 | } |
4303 | ||
77382aee PA |
4304 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4305 | should only be applied to the real process, not to an LWP, because | |
4306 | of the check for parent-process. If we need this to work for an | |
4307 | LWP, it needs some more logic. */ | |
c906108c | 4308 | |
c3f6f71d | 4309 | static void |
fba45db2 | 4310 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4311 | { |
4312 | int parent_pid; | |
c906108c | 4313 | |
c3f6f71d JM |
4314 | parent_pid = proc_parent_pid (pi); |
4315 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4316 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4317 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4318 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4319 | file for the inferior. */ | |
4320 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4321 | { | |
4322 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4323 | } | |
4324 | #endif | |
4325 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4326 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4327 | to kill the inferior, otherwise it might remain stopped with a | |
4328 | pending SIGKILL. | |
4329 | We do not check the result of the PIOCSSIG, the inferior might have | |
4330 | died already. */ | |
4331 | { | |
37de36c6 | 4332 | gdb_siginfo_t newsiginfo; |
c906108c | 4333 | |
c3f6f71d JM |
4334 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4335 | newsiginfo.si_signo = SIGKILL; | |
4336 | newsiginfo.si_code = 0; | |
4337 | newsiginfo.si_errno = 0; | |
4338 | newsiginfo.si_pid = getpid (); | |
4339 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4340 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4341 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4342 | } | |
4343 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4344 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4345 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4346 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4347 | destroy_procinfo (pi); | |
c906108c | 4348 | |
c3f6f71d JM |
4349 | /* If pi is GDB's child, wait for it to die. */ |
4350 | if (parent_pid == getpid ()) | |
19958708 | 4351 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4352 | Should we check the returned event? */ |
4353 | { | |
0d06e24b | 4354 | #if 0 |
c3f6f71d | 4355 | int status, ret; |
c906108c | 4356 | |
c3f6f71d JM |
4357 | ret = waitpid (pi->pid, &status, 0); |
4358 | #else | |
4359 | wait (NULL); | |
4360 | #endif | |
4361 | } | |
4362 | } | |
c906108c | 4363 | |
77382aee PA |
4364 | /* We're done debugging it, and we want it to go away. Then we want |
4365 | GDB to forget all about it. */ | |
c906108c | 4366 | |
19958708 | 4367 | static void |
7d85a9c0 | 4368 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4369 | { |
39f77062 | 4370 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4371 | { |
0df8b418 | 4372 | /* Find procinfo for main process. */ |
39f77062 | 4373 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4374 | |
c3f6f71d JM |
4375 | if (pi) |
4376 | unconditionally_kill_inferior (pi); | |
4377 | target_mourn_inferior (); | |
c906108c | 4378 | } |
c3f6f71d JM |
4379 | } |
4380 | ||
77382aee | 4381 | /* Forget we ever debugged this thing! */ |
c906108c | 4382 | |
19958708 | 4383 | static void |
136d6dae | 4384 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4385 | { |
4386 | procinfo *pi; | |
c906108c | 4387 | |
39f77062 | 4388 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4389 | { |
0df8b418 | 4390 | /* Find procinfo for main process. */ |
39f77062 | 4391 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4392 | if (pi) |
4393 | destroy_procinfo (pi); | |
c906108c | 4394 | } |
28439f5e | 4395 | unpush_target (ops); |
8181d85f DJ |
4396 | |
4397 | if (dbx_link_bpt != NULL) | |
4398 | { | |
a6d9a66e | 4399 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4400 | dbx_link_bpt_addr = 0; |
4401 | dbx_link_bpt = NULL; | |
4402 | } | |
4403 | ||
c3f6f71d JM |
4404 | generic_mourn_inferior (); |
4405 | } | |
c906108c | 4406 | |
77382aee PA |
4407 | /* When GDB forks to create a runnable inferior process, this function |
4408 | is called on the parent side of the fork. It's job is to do | |
4409 | whatever is necessary to make the child ready to be debugged, and | |
4410 | then wait for the child to synchronize. */ | |
c906108c | 4411 | |
19958708 | 4412 | static void |
28439f5e | 4413 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4414 | { |
4415 | procinfo *pi; | |
37de36c6 | 4416 | gdb_sigset_t signals; |
c3f6f71d | 4417 | int fail; |
2689673f | 4418 | int lwpid; |
c906108c | 4419 | |
c3f6f71d JM |
4420 | /* This routine called on the parent side (GDB side) |
4421 | after GDB forks the inferior. */ | |
28439f5e | 4422 | push_target (ops); |
c906108c | 4423 | |
c3f6f71d | 4424 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4425 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4426 | |
4427 | if (!open_procinfo_files (pi, FD_CTL)) | |
4428 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4429 | ||
4430 | /* | |
4431 | xmalloc // done | |
4432 | open_procinfo_files // done | |
4433 | link list // done | |
4434 | prfillset (trace) | |
4435 | procfs_notice_signals | |
4436 | prfillset (fault) | |
4437 | prdelset (FLTPAGE) | |
4438 | PIOCWSTOP | |
4439 | PIOCSFAULT | |
4440 | */ | |
4441 | ||
77382aee | 4442 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4443 | if (!(proc_flags (pi) & PR_STOPPED) && |
4444 | !(proc_wait_for_stop (pi))) | |
4445 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4446 | ||
4447 | /* Save some of the /proc state to be restored if we detach. */ | |
4448 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4449 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4450 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4451 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4452 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4453 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4454 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4455 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4456 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4457 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4458 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4459 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4460 | ||
c3f6f71d JM |
4461 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4462 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4463 | ||
0d06e24b JM |
4464 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4465 | and possibly even turning ON kill-on-last-close at this point. But | |
4466 | I can't make that change without careful testing which I don't have | |
4467 | time to do right now... */ | |
c3f6f71d JM |
4468 | /* Turn on run-on-last-close flag so that the child |
4469 | will die if GDB goes away for some reason. */ | |
4470 | if (!proc_set_run_on_last_close (pi)) | |
4471 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4472 | ||
2689673f PA |
4473 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4474 | lwpid = proc_get_current_thread (pi); | |
4475 | ||
4476 | /* Create a procinfo for the main lwp. */ | |
4477 | create_procinfo (pid, lwpid); | |
4478 | ||
4479 | /* We already have a main thread registered in the thread table at | |
4480 | this point, but it didn't have any lwp info yet. Notify the core | |
4481 | about it. This changes inferior_ptid as well. */ | |
4482 | thread_change_ptid (pid_to_ptid (pid), | |
4483 | MERGEPID (pid, lwpid)); | |
c906108c | 4484 | |
46ac7a5d AC |
4485 | /* Typically two, one trap to exec the shell, one to exec the |
4486 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4487 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4488 | |
4489 | #ifdef SYS_syssgi | |
4490 | /* On mips-irix, we need to stop the inferior early enough during | |
4491 | the startup phase in order to be able to load the shared library | |
4492 | symbols and insert the breakpoints that are located in these shared | |
4493 | libraries. Stopping at the program entry point is not good enough | |
4494 | because the -init code is executed before the execution reaches | |
4495 | that point. | |
4496 | ||
4497 | So what we need to do is to insert a breakpoint in the runtime | |
4498 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4499 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4500 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4501 | as rld is not part of the executable we are running, and thus we need |
4502 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4503 | |
9185ddce JB |
4504 | For this, we trace all syssgi() syscall exit events. Each time |
4505 | we detect such an event, we iterate over each text memory maps, | |
4506 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4507 | When found, we know that rld has been mapped, and that we can insert | |
4508 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4509 | has been inserted, the syssgi() notifications are no longer necessary, | |
4510 | so they should be canceled. */ | |
4511 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4512 | #endif |
c3f6f71d | 4513 | } |
c906108c | 4514 | |
77382aee PA |
4515 | /* When GDB forks to create a new process, this function is called on |
4516 | the child side of the fork before GDB exec's the user program. Its | |
4517 | job is to make the child minimally debuggable, so that the parent | |
4518 | GDB process can connect to the child and take over. This function | |
4519 | should do only the minimum to make that possible, and to | |
4520 | synchronize with the parent process. The parent process should | |
4521 | take care of the details. */ | |
c3f6f71d JM |
4522 | |
4523 | static void | |
fba45db2 | 4524 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4525 | { |
4526 | /* This routine called on the child side (inferior side) | |
4527 | after GDB forks the inferior. It must use only local variables, | |
4528 | because it may be sharing data space with its parent. */ | |
c906108c | 4529 | |
c3f6f71d | 4530 | procinfo *pi; |
37de36c6 | 4531 | sysset_t *exitset; |
c906108c | 4532 | |
c3f6f71d | 4533 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4534 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4535 | |
c3f6f71d JM |
4536 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4537 | { | |
4538 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4539 | gdb_flush (gdb_stderr); | |
77382aee PA |
4540 | /* No need to call "dead_procinfo", because we're going to |
4541 | exit. */ | |
c3f6f71d JM |
4542 | _exit (127); |
4543 | } | |
c906108c | 4544 | |
c3f6f71d JM |
4545 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4546 | /* OSF method for tracing exec syscalls. Quoting: | |
4547 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4548 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4549 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4550 | { |
4551 | int prfs_flags; | |
c906108c | 4552 | |
c3f6f71d JM |
4553 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4554 | { | |
4555 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4556 | gdb_flush (gdb_stderr); | |
4557 | _exit (127); | |
4558 | } | |
4559 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4560 | |
c3f6f71d JM |
4561 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4562 | { | |
4563 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4564 | gdb_flush (gdb_stderr); | |
4565 | _exit (127); | |
4566 | } | |
4567 | } | |
4568 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4569 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4570 | /* GW: Rationale... |
4571 | Not all systems with /proc have all the exec* syscalls with the same | |
4572 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4573 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4574 | |
37de36c6 KB |
4575 | exitset = sysset_t_alloc (pi); |
4576 | gdb_premptysysset (exitset); | |
c3f6f71d | 4577 | #ifdef SYS_exec |
37de36c6 | 4578 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4579 | #endif |
4580 | #ifdef SYS_execve | |
37de36c6 | 4581 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4582 | #endif |
4583 | #ifdef SYS_execv | |
37de36c6 | 4584 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4585 | #endif |
37de36c6 KB |
4586 | #ifdef DYNAMIC_SYSCALLS |
4587 | { | |
4588 | int callnum = find_syscall (pi, "execve"); | |
4589 | ||
4590 | if (callnum >= 0) | |
4591 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4592 | |
37de36c6 KB |
4593 | callnum = find_syscall (pi, "ra_execve"); |
4594 | if (callnum >= 0) | |
4595 | gdb_praddsysset (exitset, callnum); | |
4596 | } | |
4597 | #endif /* DYNAMIC_SYSCALLS */ | |
4598 | ||
4599 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4600 | { |
c3f6f71d JM |
4601 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4602 | gdb_flush (gdb_stderr); | |
4603 | _exit (127); | |
c906108c | 4604 | } |
c3f6f71d JM |
4605 | #endif /* PRFS_STOPEXEC */ |
4606 | ||
0df8b418 | 4607 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4608 | /* Turn off inherit on fork flag so that all grand-children |
4609 | of gdb start with tracing flags cleared. */ | |
4610 | if (!proc_unset_inherit_on_fork (pi)) | |
4611 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4612 | ||
4613 | /* Turn off run on last close flag, so that the child process | |
4614 | cannot run away just because we close our handle on it. | |
4615 | We want it to wait for the parent to attach. */ | |
4616 | if (!proc_unset_run_on_last_close (pi)) | |
4617 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4618 | ||
19958708 | 4619 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4620 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4621 | /*destroy_procinfo (pi);*/ |
c906108c | 4622 | } |
c906108c | 4623 | |
77382aee PA |
4624 | /* This function is called BEFORE gdb forks the inferior process. Its |
4625 | only real responsibility is to set things up for the fork, and tell | |
4626 | GDB which two functions to call after the fork (one for the parent, | |
4627 | and one for the child). | |
4628 | ||
4629 | This function does a complicated search for a unix shell program, | |
4630 | which it then uses to parse arguments and environment variables to | |
4631 | be sent to the child. I wonder whether this code could not be | |
4632 | abstracted out and shared with other unix targets such as | |
4633 | inf-ptrace? */ | |
c906108c SS |
4634 | |
4635 | static void | |
136d6dae VP |
4636 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4637 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4638 | { |
4639 | char *shell_file = getenv ("SHELL"); | |
4640 | char *tryname; | |
28439f5e PA |
4641 | int pid; |
4642 | ||
c906108c SS |
4643 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4644 | { | |
4645 | ||
4646 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4647 | just do this the normal way (via execlp, which operates by |
4648 | attempting an exec for each element of the PATH until it | |
4649 | finds one which succeeds), then there will be an exec for | |
4650 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4651 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4652 | for these failed execs with the ones for successful execs | |
4653 | (whether the exec has succeeded is stored at that time in the | |
4654 | carry bit or some such architecture-specific and | |
4655 | non-ABI-specified place). | |
4656 | ||
4657 | So I can't think of anything better than to search the PATH | |
4658 | now. This has several disadvantages: (1) There is a race | |
4659 | condition; if we find a file now and it is deleted before we | |
4660 | exec it, we lose, even if the deletion leaves a valid file | |
4661 | further down in the PATH, (2) there is no way to know exactly | |
4662 | what an executable (in the sense of "capable of being | |
4663 | exec'd") file is. Using access() loses because it may lose | |
4664 | if the caller is the superuser; failing to use it loses if | |
4665 | there are ACLs or some such. */ | |
c906108c SS |
4666 | |
4667 | char *p; | |
4668 | char *p1; | |
4669 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4670 | path is used from within GDB. */ |
c906108c SS |
4671 | char *path = getenv ("PATH"); |
4672 | int len; | |
4673 | struct stat statbuf; | |
4674 | ||
4675 | if (path == NULL) | |
4676 | path = "/bin:/usr/bin"; | |
4677 | ||
4678 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4679 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4680 | { |
4681 | p1 = strchr (p, ':'); | |
4682 | if (p1 != NULL) | |
4683 | len = p1 - p; | |
4684 | else | |
4685 | len = strlen (p); | |
4686 | strncpy (tryname, p, len); | |
4687 | tryname[len] = '\0'; | |
4688 | strcat (tryname, "/"); | |
4689 | strcat (tryname, shell_file); | |
4690 | if (access (tryname, X_OK) < 0) | |
4691 | continue; | |
4692 | if (stat (tryname, &statbuf) < 0) | |
4693 | continue; | |
4694 | if (!S_ISREG (statbuf.st_mode)) | |
4695 | /* We certainly need to reject directories. I'm not quite | |
4696 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4697 | that people want to exec() these things. */ | |
4698 | continue; | |
4699 | break; | |
4700 | } | |
4701 | if (p == NULL) | |
4702 | /* Not found. This must be an error rather than merely passing | |
4703 | the file to execlp(), because execlp() would try all the | |
4704 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4705 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4706 | __LINE__, shell_file); |
c906108c SS |
4707 | |
4708 | shell_file = tryname; | |
4709 | } | |
4710 | ||
28439f5e | 4711 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4712 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4713 | |
4714 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4715 | } |
4716 | ||
4717 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4718 | |
27087a3d JB |
4719 | static void |
4720 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4721 | { | |
9185ddce | 4722 | #ifdef SYS_syssgi |
77382aee | 4723 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4724 | They should normally have been removed by now, but they may still |
4725 | be activated if the inferior doesn't use shared libraries, or if | |
4726 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4727 | See procfs_init_inferior() for more details. |
4728 | ||
4729 | Since these notifications are only ever enabled when we spawned | |
4730 | the inferior ourselves, there is nothing to do when the inferior | |
4731 | was created by attaching to an already running process, or when | |
4732 | debugging a core file. */ | |
4733 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4734 | return; | |
4735 | ||
9185ddce | 4736 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
77382aee | 4737 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); |
9185ddce | 4738 | #endif |
c906108c SS |
4739 | } |
4740 | ||
77382aee | 4741 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4742 | |
c3f6f71d | 4743 | static int |
fba45db2 | 4744 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4745 | { |
39f77062 | 4746 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 4747 | |
2689673f | 4748 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4749 | add_thread (gdb_threadid); |
c906108c | 4750 | |
c3f6f71d JM |
4751 | return 0; |
4752 | } | |
4753 | ||
77382aee PA |
4754 | /* Query all the threads that the target knows about, and give them |
4755 | back to GDB to add to its list. */ | |
c3f6f71d | 4756 | |
d3581e61 | 4757 | static void |
28439f5e | 4758 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4759 | { |
4760 | procinfo *pi; | |
4761 | ||
0df8b418 | 4762 | /* Find procinfo for main process. */ |
39f77062 | 4763 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4764 | proc_update_threads (pi); |
4765 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4766 | } |
4767 | ||
77382aee PA |
4768 | /* Return true if the thread is still 'alive'. This guy doesn't |
4769 | really seem to be doing his job. Got to investigate how to tell | |
4770 | when a thread is really gone. */ | |
c906108c | 4771 | |
c906108c | 4772 | static int |
28439f5e | 4773 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4774 | { |
c3f6f71d JM |
4775 | int proc, thread; |
4776 | procinfo *pi; | |
c906108c | 4777 | |
39f77062 KB |
4778 | proc = PIDGET (ptid); |
4779 | thread = TIDGET (ptid); | |
0df8b418 | 4780 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4781 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4782 | return 0; | |
4783 | ||
4784 | /* If I can't get its status, it ain't alive! | |
4785 | What's more, I need to forget about it! */ | |
4786 | if (!proc_get_status (pi)) | |
4787 | { | |
4788 | destroy_procinfo (pi); | |
4789 | return 0; | |
4790 | } | |
77382aee PA |
4791 | /* I couldn't have got its status if it weren't alive, so it's |
4792 | alive. */ | |
c3f6f71d | 4793 | return 1; |
c906108c | 4794 | } |
c3f6f71d | 4795 | |
77382aee PA |
4796 | /* Convert PTID to a string. Returns the string in a static |
4797 | buffer. */ | |
c3f6f71d | 4798 | |
d3581e61 | 4799 | static char * |
117de6a9 | 4800 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
4801 | { |
4802 | static char buf[80]; | |
c3f6f71d | 4803 | |
5240ceac MK |
4804 | if (TIDGET (ptid) == 0) |
4805 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 4806 | else |
21749010 | 4807 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
4808 | |
4809 | return buf; | |
c3f6f71d JM |
4810 | } |
4811 | ||
77382aee | 4812 | /* Insert a watchpoint. */ |
c3f6f71d | 4813 | |
a0911fd0 | 4814 | static int |
39f77062 | 4815 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 4816 | int after) |
c906108c | 4817 | { |
c3f6f71d | 4818 | #ifndef UNIXWARE |
37de36c6 | 4819 | #ifndef AIX5 |
c3f6f71d | 4820 | int pflags = 0; |
19958708 | 4821 | procinfo *pi; |
c3f6f71d | 4822 | |
19958708 | 4823 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 4824 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d | 4825 | |
0df8b418 MS |
4826 | /* Translate from GDB's flags to /proc's. */ |
4827 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 4828 | { |
0df8b418 | 4829 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
4830 | case hw_write: /* default watchpoint (write) */ |
4831 | pflags = WRITE_WATCHFLAG; | |
4832 | break; | |
4833 | case hw_read: /* read watchpoint */ | |
4834 | pflags = READ_WATCHFLAG; | |
4835 | break; | |
4836 | case hw_access: /* access watchpoint */ | |
4837 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4838 | break; | |
4839 | case hw_execute: /* execution HW breakpoint */ | |
4840 | pflags = EXEC_WATCHFLAG; | |
4841 | break; | |
0df8b418 | 4842 | default: /* Something weird. Return error. */ |
c906108c | 4843 | return -1; |
c3f6f71d | 4844 | } |
0df8b418 | 4845 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
4846 | pflags |= AFTER_WATCHFLAG; |
4847 | } | |
4848 | ||
4849 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4850 | { | |
0df8b418 | 4851 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
4852 | return -1; /* fail */ |
4853 | /* GDB may try to remove the same watchpoint twice. | |
4854 | If a remove request returns no match, don't error. */ | |
c906108c | 4855 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4856 | return 0; /* ignore */ |
4857 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4858 | } |
37de36c6 KB |
4859 | #endif /* AIX5 */ |
4860 | #endif /* UNIXWARE */ | |
c906108c SS |
4861 | return 0; |
4862 | } | |
4863 | ||
1e03ad20 KB |
4864 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
4865 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
4866 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
4867 | far. | |
19958708 | 4868 | |
1e03ad20 KB |
4869 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
4870 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 4871 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
4872 | |
4873 | static int | |
4874 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
4875 | { | |
1e03ad20 KB |
4876 | /* Due to the way that proc_set_watchpoint() is implemented, host |
4877 | and target pointers must be of the same size. If they are not, | |
4878 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
4879 | fact that proc_set_watchpoint() calls |
4880 | procfs_address_to_host_pointer(); a close inspection of | |
4881 | procfs_address_to_host_pointer will reveal that an internal error | |
4882 | will be generated when the host and target pointer sizes are | |
4883 | different. */ | |
4e906f53 | 4884 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
f4a14ae6 | 4885 | |
4e906f53 | 4886 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
4887 | return 0; |
4888 | ||
4889 | /* Other tests here??? */ | |
4890 | ||
4891 | return 1; | |
1e03ad20 KB |
4892 | } |
4893 | ||
77382aee PA |
4894 | /* Returns non-zero if process is stopped on a hardware watchpoint |
4895 | fault, else returns zero. */ | |
c3f6f71d | 4896 | |
25513619 PA |
4897 | static int |
4898 | procfs_stopped_by_watchpoint (void) | |
c906108c | 4899 | { |
c3f6f71d | 4900 | procinfo *pi; |
c906108c | 4901 | |
25513619 | 4902 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa | 4903 | |
c3f6f71d | 4904 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4905 | { |
c3f6f71d | 4906 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 4907 | { |
c906108c | 4908 | #ifdef FLTWATCH |
c3f6f71d JM |
4909 | if (proc_what (pi) == FLTWATCH) |
4910 | return 1; | |
c906108c SS |
4911 | #endif |
4912 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4913 | if (proc_what (pi) == FLTKWATCH) |
4914 | return 1; | |
c906108c | 4915 | #endif |
c3f6f71d | 4916 | } |
c906108c SS |
4917 | } |
4918 | return 0; | |
4919 | } | |
c906108c | 4920 | |
77382aee PA |
4921 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
4922 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
4923 | address. This function is only called if | |
4924 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
4925 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
4926 | |
4927 | static int | |
4928 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
4929 | { | |
4930 | procinfo *pi; | |
4931 | ||
4932 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
4933 | return proc_watchpoint_address (pi, addr); | |
4934 | } | |
4935 | ||
25513619 | 4936 | static int |
0cf6dd15 TJB |
4937 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
4938 | struct expression *cond) | |
25513619 | 4939 | { |
d92524f1 | 4940 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 4941 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
4942 | { |
4943 | /* When a hardware watchpoint fires off the PC will be left at | |
4944 | the instruction following the one which caused the | |
4945 | watchpoint. It will *NOT* be necessary for GDB to step over | |
4946 | the watchpoint. */ | |
4947 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
4948 | } | |
4949 | else | |
4950 | { | |
4951 | /* When a hardware watchpoint fires off the PC will be left at | |
4952 | the instruction which caused the watchpoint. It will be | |
4953 | necessary for GDB to step over the watchpoint. */ | |
4954 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
4955 | } | |
4956 | } | |
4957 | ||
4958 | static int | |
0cf6dd15 TJB |
4959 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
4960 | struct expression *cond) | |
25513619 PA |
4961 | { |
4962 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
4963 | } | |
4964 | ||
4965 | static int | |
4966 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
4967 | { | |
4968 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
4969 | system can support "thousands" of hardware watchpoints, but gives | |
4970 | no method for finding out how many; It doesn't say anything about | |
4971 | the allowed size for the watched area either. So we just tell | |
4972 | GDB 'yes'. */ | |
4973 | return 1; | |
4974 | } | |
4975 | ||
4976 | void | |
4977 | procfs_use_watchpoints (struct target_ops *t) | |
4978 | { | |
4979 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
4980 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
4981 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
4982 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 4983 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 4984 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
4985 | } |
4986 | ||
77382aee PA |
4987 | /* Memory Mappings Functions: */ |
4988 | ||
4989 | /* Call a callback function once for each mapping, passing it the | |
4990 | mapping, an optional secondary callback function, and some optional | |
4991 | opaque data. Quit and return the first non-zero value returned | |
4992 | from the callback. | |
4993 | ||
4994 | PI is the procinfo struct for the process to be mapped. FUNC is | |
4995 | the callback function to be called by this iterator. DATA is the | |
4996 | optional opaque data to be passed to the callback function. | |
4997 | CHILD_FUNC is the optional secondary function pointer to be passed | |
4998 | to the child function. Returns the first non-zero return value | |
4999 | from the callback function, or zero. */ | |
831e682e MS |
5000 | |
5001 | static int | |
b8edc417 | 5002 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 5003 | void *data, |
19958708 | 5004 | int (*func) (struct prmap *map, |
b8edc417 | 5005 | find_memory_region_ftype child_func, |
831e682e MS |
5006 | void *data)) |
5007 | { | |
5008 | char pathname[MAX_PROC_NAME_SIZE]; | |
5009 | struct prmap *prmaps; | |
5010 | struct prmap *prmap; | |
5011 | int funcstat; | |
5012 | int map_fd; | |
5013 | int nmap; | |
0a86f364 | 5014 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
5015 | #ifdef NEW_PROC_API |
5016 | struct stat sbuf; | |
5017 | #endif | |
5018 | ||
19958708 | 5019 | /* Get the number of mappings, allocate space, |
831e682e MS |
5020 | and read the mappings into prmaps. */ |
5021 | #ifdef NEW_PROC_API | |
0df8b418 | 5022 | /* Open map fd. */ |
831e682e MS |
5023 | sprintf (pathname, "/proc/%d/map", pi->pid); |
5024 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5025 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5026 | ||
0df8b418 | 5027 | /* Make sure it gets closed again. */ |
831e682e MS |
5028 | make_cleanup_close (map_fd); |
5029 | ||
19958708 | 5030 | /* Use stat to determine the file size, and compute |
831e682e MS |
5031 | the number of prmap_t objects it contains. */ |
5032 | if (fstat (map_fd, &sbuf) != 0) | |
5033 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5034 | ||
5035 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5036 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5037 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5038 | != (nmap * sizeof (*prmaps))) | |
5039 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5040 | #else | |
5041 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5042 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5043 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5044 | ||
5045 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5046 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5047 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5048 | #endif | |
5049 | ||
5050 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5051 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5052 | { |
5053 | do_cleanups (cleanups); | |
5054 | return funcstat; | |
5055 | } | |
831e682e | 5056 | |
0a86f364 | 5057 | do_cleanups (cleanups); |
831e682e MS |
5058 | return 0; |
5059 | } | |
5060 | ||
77382aee | 5061 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5062 | function for each memory region. |
77382aee | 5063 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5064 | |
5065 | static int | |
19958708 | 5066 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5067 | find_memory_region_ftype func, void *data) |
be4d1333 | 5068 | { |
bf75638e | 5069 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5070 | map->pr_size, |
be4d1333 MS |
5071 | (map->pr_mflags & MA_READ) != 0, |
5072 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5073 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 5074 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
5075 | data); |
5076 | } | |
5077 | ||
77382aee PA |
5078 | /* External interface. Calls a callback function once for each |
5079 | mapped memory region in the child process, passing as arguments: | |
5080 | ||
5081 | CORE_ADDR virtual_address, | |
5082 | unsigned long size, | |
5083 | int read, TRUE if region is readable by the child | |
5084 | int write, TRUE if region is writable by the child | |
5085 | int execute TRUE if region is executable by the child. | |
5086 | ||
5087 | Stops iterating and returns the first non-zero value returned by | |
5088 | the callback. */ | |
be4d1333 MS |
5089 | |
5090 | static int | |
b8edc417 | 5091 | proc_find_memory_regions (find_memory_region_ftype func, void *data) |
be4d1333 MS |
5092 | { |
5093 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5094 | ||
19958708 | 5095 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5096 | find_memory_regions_callback); |
5097 | } | |
5098 | ||
77382aee | 5099 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5100 | |
388faa48 | 5101 | static char * |
5ae5f592 | 5102 | mappingflags (long flags) |
388faa48 MS |
5103 | { |
5104 | static char asciiflags[8]; | |
5105 | ||
5106 | strcpy (asciiflags, "-------"); | |
5107 | #if defined (MA_PHYS) | |
5108 | if (flags & MA_PHYS) | |
5109 | asciiflags[0] = 'd'; | |
5110 | #endif | |
5111 | if (flags & MA_STACK) | |
5112 | asciiflags[1] = 's'; | |
5113 | if (flags & MA_BREAK) | |
5114 | asciiflags[2] = 'b'; | |
5115 | if (flags & MA_SHARED) | |
5116 | asciiflags[3] = 's'; | |
5117 | if (flags & MA_READ) | |
5118 | asciiflags[4] = 'r'; | |
5119 | if (flags & MA_WRITE) | |
5120 | asciiflags[5] = 'w'; | |
5121 | if (flags & MA_EXEC) | |
5122 | asciiflags[6] = 'x'; | |
5123 | return (asciiflags); | |
5124 | } | |
5125 | ||
77382aee PA |
5126 | /* Callback function, does the actual work for 'info proc |
5127 | mappings'. */ | |
831e682e | 5128 | |
831e682e | 5129 | static int |
b8edc417 | 5130 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5131 | void *unused) |
831e682e | 5132 | { |
0b62613e | 5133 | unsigned int pr_off; |
831e682e | 5134 | |
831e682e | 5135 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5136 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5137 | #else |
0b62613e | 5138 | pr_off = map->pr_off; |
831e682e | 5139 | #endif |
0b62613e | 5140 | |
a97b0ac8 | 5141 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5142 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5143 | (unsigned long) map->pr_vaddr, |
5144 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5145 | (unsigned long) map->pr_size, |
0b62613e PA |
5146 | pr_off, |
5147 | mappingflags (map->pr_mflags)); | |
5148 | else | |
f6a96b83 | 5149 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5150 | (unsigned long) map->pr_vaddr, |
5151 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5152 | (unsigned long) map->pr_size, |
0b62613e PA |
5153 | pr_off, |
5154 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5155 | |
5156 | return 0; | |
5157 | } | |
5158 | ||
77382aee | 5159 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5160 | |
5161 | static void | |
5162 | info_proc_mappings (procinfo *pi, int summary) | |
5163 | { | |
388faa48 | 5164 | if (summary) |
0df8b418 | 5165 | return; /* No output for summary mode. */ |
388faa48 | 5166 | |
a3f17187 | 5167 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5168 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5169 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5170 | "Start Addr", | |
5171 | " End Addr", | |
5172 | " Size", | |
5173 | " Offset", | |
5174 | "Flags"); | |
5175 | else | |
5176 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5177 | "Start Addr", | |
5178 | " End Addr", | |
5179 | " Size", | |
5180 | " Offset", | |
5181 | "Flags"); | |
388faa48 | 5182 | |
831e682e | 5183 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5184 | printf_filtered ("\n"); |
5185 | } | |
5186 | ||
77382aee | 5187 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5188 | |
5189 | static void | |
145b16a9 UW |
5190 | procfs_info_proc (struct target_ops *ops, char *args, |
5191 | enum info_proc_what what) | |
c906108c | 5192 | { |
c3f6f71d | 5193 | struct cleanup *old_chain; |
388faa48 MS |
5194 | procinfo *process = NULL; |
5195 | procinfo *thread = NULL; | |
5196 | char **argv = NULL; | |
5197 | char *tmp = NULL; | |
5198 | int pid = 0; | |
5199 | int tid = 0; | |
5200 | int mappings = 0; | |
c906108c | 5201 | |
145b16a9 UW |
5202 | switch (what) |
5203 | { | |
5204 | case IP_MINIMAL: | |
5205 | break; | |
5206 | ||
5207 | case IP_MAPPINGS: | |
5208 | case IP_ALL: | |
5209 | mappings = 1; | |
5210 | break; | |
5211 | ||
5212 | default: | |
5213 | error (_("Not supported on this target.")); | |
5214 | } | |
5215 | ||
c3f6f71d JM |
5216 | old_chain = make_cleanup (null_cleanup, 0); |
5217 | if (args) | |
0fda6bd2 | 5218 | { |
d1a41061 PP |
5219 | argv = gdb_buildargv (args); |
5220 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5221 | } |
c3f6f71d JM |
5222 | while (argv != NULL && *argv != NULL) |
5223 | { | |
5224 | if (isdigit (argv[0][0])) | |
5225 | { | |
5226 | pid = strtoul (argv[0], &tmp, 10); | |
5227 | if (*tmp == '/') | |
5228 | tid = strtoul (++tmp, NULL, 10); | |
5229 | } | |
5230 | else if (argv[0][0] == '/') | |
5231 | { | |
5232 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5233 | } | |
c3f6f71d JM |
5234 | argv++; |
5235 | } | |
5236 | if (pid == 0) | |
39f77062 | 5237 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5238 | if (pid == 0) |
8a3fe4f8 | 5239 | error (_("No current process: you must name one.")); |
c3f6f71d | 5240 | else |
c906108c | 5241 | { |
c3f6f71d | 5242 | /* Have pid, will travel. |
0df8b418 | 5243 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5244 | process = find_procinfo (pid, 0); |
5245 | if (process == NULL) | |
5246 | { | |
19958708 | 5247 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5248 | remember to close it again when finished. */ |
5249 | process = create_procinfo (pid, 0); | |
004527cb | 5250 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5251 | if (!open_procinfo_files (process, FD_CTL)) |
5252 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5253 | } | |
c906108c | 5254 | } |
c3f6f71d JM |
5255 | if (tid != 0) |
5256 | thread = create_procinfo (pid, tid); | |
5257 | ||
5258 | if (process) | |
5259 | { | |
a3f17187 | 5260 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5261 | proc_prettyprint_flags (proc_flags (process), 1); |
5262 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5263 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5264 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5265 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5266 | proc_get_nthreads (process)); |
5267 | } | |
5268 | if (thread) | |
5269 | { | |
a3f17187 | 5270 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5271 | proc_prettyprint_flags (proc_flags (thread), 1); |
5272 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5273 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5274 | } | |
5275 | ||
388faa48 MS |
5276 | if (mappings) |
5277 | { | |
5278 | info_proc_mappings (process, 0); | |
5279 | } | |
5280 | ||
c3f6f71d | 5281 | do_cleanups (old_chain); |
c906108c SS |
5282 | } |
5283 | ||
9185ddce JB |
5284 | /* Modify the status of the system call identified by SYSCALLNUM in |
5285 | the set of syscalls that are currently traced/debugged. | |
5286 | ||
5287 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5288 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5289 | |
0df8b418 | 5290 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5291 | will be disabled. */ |
5292 | ||
5293 | static void | |
5294 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5295 | int mode, int from_tty) |
9185ddce JB |
5296 | { |
5297 | sysset_t *sysset; | |
77382aee | 5298 | |
9185ddce JB |
5299 | if (entry_or_exit == PR_SYSENTRY) |
5300 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5301 | else | |
5302 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5303 | ||
5304 | if (sysset == NULL) | |
5305 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5306 | ||
5307 | if (mode == FLAG_SET) | |
5308 | gdb_praddsysset (sysset, syscallnum); | |
5309 | else | |
5310 | gdb_prdelsysset (sysset, syscallnum); | |
5311 | ||
5312 | if (entry_or_exit == PR_SYSENTRY) | |
5313 | { | |
5314 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5315 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5316 | } |
5317 | else | |
5318 | { | |
5319 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5320 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5321 | } |
5322 | } | |
5323 | ||
c3f6f71d | 5324 | static void |
fba45db2 | 5325 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5326 | { |
c3f6f71d | 5327 | procinfo *pi; |
c906108c | 5328 | |
39f77062 | 5329 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5330 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5331 | |
c3f6f71d | 5332 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5333 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5334 | |
39f77062 | 5335 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5336 | if (isdigit (args[0])) |
5337 | { | |
9185ddce | 5338 | const int syscallnum = atoi (args); |
c906108c | 5339 | |
9185ddce | 5340 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5341 | } |
5342 | } | |
5343 | ||
19958708 | 5344 | static void |
fba45db2 | 5345 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5346 | { |
c3f6f71d JM |
5347 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5348 | } | |
c906108c | 5349 | |
19958708 | 5350 | static void |
fba45db2 | 5351 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5352 | { |
5353 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5354 | } |
c906108c | 5355 | |
19958708 | 5356 | static void |
fba45db2 | 5357 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5358 | { |
5359 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5360 | } | |
5361 | ||
19958708 | 5362 | static void |
fba45db2 | 5363 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5364 | { |
c3f6f71d JM |
5365 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5366 | } | |
c906108c | 5367 | |
c906108c | 5368 | |
a0911fd0 MR |
5369 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5370 | extern void _initialize_procfs (void); | |
5371 | ||
c906108c | 5372 | void |
fba45db2 | 5373 | _initialize_procfs (void) |
c906108c | 5374 | { |
27087a3d JB |
5375 | observer_attach_inferior_created (procfs_inferior_created); |
5376 | ||
19958708 | 5377 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5378 | _("Give a trace of entries into the syscall.")); |
19958708 | 5379 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5380 | _("Give a trace of exits from the syscall.")); |
19958708 | 5381 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5382 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5383 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5384 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5385 | } |
5386 | ||
5387 | /* =================== END, GDB "MODULE" =================== */ | |
5388 | ||
5389 | ||
5390 | ||
77382aee PA |
5391 | /* miscellaneous stubs: */ |
5392 | ||
5393 | /* The following satisfy a few random symbols mostly created by the | |
5394 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5395 | |
77382aee PA |
5396 | /* Return a pid for which we guarantee we will be able to find a |
5397 | 'live' procinfo. */ | |
c3f6f71d | 5398 | |
39f77062 | 5399 | ptid_t |
fba45db2 | 5400 | procfs_first_available (void) |
c3f6f71d | 5401 | { |
39f77062 | 5402 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5403 | } |
be4d1333 MS |
5404 | |
5405 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
5406 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
5407 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
5408 | |
5409 | static char * | |
19958708 | 5410 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 5411 | char *note_data, int *note_size, |
2ea28649 | 5412 | enum gdb_signal stop_signal) |
be4d1333 | 5413 | { |
594f7785 | 5414 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5415 | gdb_gregset_t gregs; |
5416 | gdb_fpregset_t fpregs; | |
5417 | unsigned long merged_pid; | |
75125405 | 5418 | struct cleanup *old_chain; |
be4d1333 MS |
5419 | |
5420 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
5421 | ||
75125405 DJ |
5422 | /* This part is the old method for fetching registers. |
5423 | It should be replaced by the newer one using regsets | |
5424 | once it is implemented in this platform: | |
0df8b418 | 5425 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5426 | |
5427 | old_chain = save_inferior_ptid (); | |
5428 | inferior_ptid = ptid; | |
5429 | target_fetch_registers (regcache, -1); | |
5430 | ||
594f7785 | 5431 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5432 | #if defined (NEW_PROC_API) |
65554fef MS |
5433 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5434 | note_data, | |
5435 | note_size, | |
19958708 | 5436 | merged_pid, |
65554fef MS |
5437 | stop_signal, |
5438 | &gregs); | |
5439 | #else | |
be4d1333 | 5440 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5441 | note_data, |
5442 | note_size, | |
19958708 | 5443 | merged_pid, |
be4d1333 | 5444 | stop_signal, |
65554fef MS |
5445 | &gregs); |
5446 | #endif | |
594f7785 | 5447 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5448 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5449 | note_data, | |
5450 | note_size, | |
5451 | &fpregs, | |
5452 | sizeof (fpregs)); | |
75125405 DJ |
5453 | |
5454 | do_cleanups (old_chain); | |
5455 | ||
be4d1333 MS |
5456 | return note_data; |
5457 | } | |
5458 | ||
5459 | struct procfs_corefile_thread_data { | |
5460 | bfd *obfd; | |
5461 | char *note_data; | |
5462 | int *note_size; | |
2ea28649 | 5463 | enum gdb_signal stop_signal; |
be4d1333 MS |
5464 | }; |
5465 | ||
5466 | static int | |
65554fef | 5467 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5468 | { |
5469 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5470 | |
2689673f | 5471 | if (pi != NULL) |
be4d1333 | 5472 | { |
75125405 | 5473 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
f4a14ae6 | 5474 | |
75125405 | 5475 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5476 | args->note_data, |
2020b7ab PA |
5477 | args->note_size, |
5478 | args->stop_signal); | |
be4d1333 MS |
5479 | } |
5480 | return 0; | |
5481 | } | |
5482 | ||
a223f1e7 JB |
5483 | static int |
5484 | find_signalled_thread (struct thread_info *info, void *data) | |
5485 | { | |
a493e3e2 | 5486 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
5487 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5488 | return 1; | |
5489 | ||
5490 | return 0; | |
5491 | } | |
5492 | ||
2ea28649 | 5493 | static enum gdb_signal |
a223f1e7 JB |
5494 | find_stop_signal (void) |
5495 | { | |
5496 | struct thread_info *info = | |
5497 | iterate_over_threads (find_signalled_thread, NULL); | |
5498 | ||
5499 | if (info) | |
16c381f0 | 5500 | return info->suspend.stop_signal; |
a223f1e7 | 5501 | else |
a493e3e2 | 5502 | return GDB_SIGNAL_0; |
a223f1e7 JB |
5503 | } |
5504 | ||
be4d1333 MS |
5505 | static char * |
5506 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5507 | { | |
5508 | struct cleanup *old_chain; | |
5509 | gdb_gregset_t gregs; | |
5510 | gdb_fpregset_t fpregs; | |
5511 | char fname[16] = {'\0'}; | |
5512 | char psargs[80] = {'\0'}; | |
5513 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5514 | char *note_data = NULL; | |
6dbdc4a3 | 5515 | char *inf_args; |
be4d1333 | 5516 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5517 | gdb_byte *auxv; |
4e73f23d | 5518 | int auxv_len; |
2ea28649 | 5519 | enum gdb_signal stop_signal; |
be4d1333 MS |
5520 | |
5521 | if (get_exec_file (0)) | |
5522 | { | |
9f37bbcc | 5523 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5524 | fname[sizeof (fname) - 1] = 0; |
5525 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5526 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5527 | |
5528 | inf_args = get_inferior_args (); | |
5529 | if (inf_args && *inf_args && | |
5530 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5531 | { |
19958708 | 5532 | strncat (psargs, " ", |
be4d1333 | 5533 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5534 | strncat (psargs, inf_args, |
be4d1333 MS |
5535 | sizeof (psargs) - strlen (psargs)); |
5536 | } | |
5537 | } | |
5538 | ||
19958708 RM |
5539 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5540 | note_data, | |
5541 | note_size, | |
5542 | fname, | |
be4d1333 MS |
5543 | psargs); |
5544 | ||
651c8d2d PA |
5545 | stop_signal = find_stop_signal (); |
5546 | ||
8903eff6 | 5547 | #ifdef UNIXWARE |
594f7785 | 5548 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
5549 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
5550 | PIDGET (inferior_ptid), | |
65554fef MS |
5551 | stop_signal, &gregs); |
5552 | #endif | |
5553 | ||
be4d1333 MS |
5554 | thread_args.obfd = obfd; |
5555 | thread_args.note_data = note_data; | |
5556 | thread_args.note_size = note_size; | |
651c8d2d | 5557 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5558 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5559 | &thread_args); | |
65554fef | 5560 | |
2689673f PA |
5561 | /* There should be always at least one thread. */ |
5562 | gdb_assert (thread_args.note_data != note_data); | |
5563 | note_data = thread_args.note_data; | |
be4d1333 | 5564 | |
13547ab6 DJ |
5565 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5566 | NULL, &auxv); | |
4e73f23d RM |
5567 | if (auxv_len > 0) |
5568 | { | |
5569 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5570 | "CORE", NT_AUXV, auxv, auxv_len); | |
5571 | xfree (auxv); | |
5572 | } | |
5573 | ||
be4d1333 MS |
5574 | make_cleanup (xfree, note_data); |
5575 | return note_data; | |
5576 | } | |
65554fef MS |
5577 | #else /* !(Solaris or Unixware) */ |
5578 | static char * | |
5579 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5580 | { | |
8a3fe4f8 | 5581 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5582 | return NULL; /* lint */ |
5583 | } | |
5584 | #endif /* Solaris or Unixware */ | |
be4d1333 | 5585 | /* =================== END GCORE .NOTE "MODULE" =================== */ |