Commit | Line | Data |
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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
4c38e0a4 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2008, 2009, 2010 |
6aba47ca | 4 | Free Software Foundation, Inc. |
2555fe1a | 5 | |
c3f6f71d JM |
6 | Written by Michael Snyder at Cygnus Solutions. |
7 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 8 | |
a9762ec7 JB |
9 | This file is part of GDB. |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 3 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 23 | |
c3f6f71d JM |
24 | #include "defs.h" |
25 | #include "inferior.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
c906108c | 33 | |
c3f6f71d JM |
34 | #if defined (NEW_PROC_API) |
35 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ | |
36 | #endif | |
c906108c | 37 | |
c3f6f71d | 38 | #include <sys/procfs.h> |
37de36c6 | 39 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 40 | #include <sys/fault.h> |
37de36c6 KB |
41 | #endif |
42 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 43 | #include <sys/syscall.h> |
37de36c6 | 44 | #endif |
c3f6f71d | 45 | #include <sys/errno.h> |
2555fe1a | 46 | #include "gdb_wait.h" |
0fda6bd2 JM |
47 | #include <signal.h> |
48 | #include <ctype.h> | |
19958708 | 49 | #include "gdb_string.h" |
df8f7274 | 50 | #include "gdb_assert.h" |
44270758 | 51 | #include "inflow.h" |
4e73f23d | 52 | #include "auxv.h" |
d1a7880c | 53 | #include "procfs.h" |
27087a3d | 54 | #include "observer.h" |
0fda6bd2 | 55 | |
19958708 | 56 | /* |
c3f6f71d JM |
57 | * PROCFS.C |
58 | * | |
59 | * This module provides the interface between GDB and the | |
60 | * /proc file system, which is used on many versions of Unix | |
61 | * as a means for debuggers to control other processes. | |
62 | * Examples of the systems that use this interface are: | |
63 | * Irix | |
64 | * Solaris | |
65 | * OSF | |
66 | * Unixware | |
37de36c6 | 67 | * AIX5 |
c3f6f71d | 68 | * |
65554fef | 69 | * /proc works by imitating a file system: you open a simulated file |
c3f6f71d JM |
70 | * that represents the process you wish to interact with, and |
71 | * perform operations on that "file" in order to examine or change | |
72 | * the state of the other process. | |
73 | * | |
74 | * The most important thing to know about /proc and this module | |
75 | * is that there are two very different interfaces to /proc: | |
76 | * One that uses the ioctl system call, and | |
77 | * another that uses read and write system calls. | |
78 | * This module has to support both /proc interfaces. This means | |
79 | * that there are two different ways of doing every basic operation. | |
80 | * | |
19958708 | 81 | * In order to keep most of the code simple and clean, I have |
c3f6f71d JM |
82 | * defined an interface "layer" which hides all these system calls. |
83 | * An ifdef (NEW_PROC_API) determines which interface we are using, | |
84 | * and most or all occurrances of this ifdef should be confined to | |
85 | * this interface layer. | |
c906108c SS |
86 | */ |
87 | ||
88 | ||
c3f6f71d | 89 | /* Determine which /proc API we are using: |
19958708 | 90 | The ioctl API defines PIOCSTATUS, while |
c3f6f71d | 91 | the read/write (multiple fd) API never does. */ |
c906108c | 92 | |
c3f6f71d | 93 | #ifdef NEW_PROC_API |
c906108c | 94 | #include <sys/types.h> |
4b14d3e4 | 95 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 96 | #endif |
c906108c | 97 | |
c3f6f71d JM |
98 | #include <fcntl.h> /* for O_RDONLY */ |
99 | #include <unistd.h> /* for "X_OK" */ | |
100 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 101 | |
103b3ef5 MS |
102 | /* Note: procfs-utils.h must be included after the above system header |
103 | files, because it redefines various system calls using macros. | |
104 | This may be incompatible with the prototype declarations. */ | |
105 | ||
103b3ef5 MS |
106 | #include "proc-utils.h" |
107 | ||
c60c0f5f MS |
108 | /* Prototypes for supply_gregset etc. */ |
109 | #include "gregset.h" | |
110 | ||
c3f6f71d | 111 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 112 | |
c3f6f71d JM |
113 | /* |
114 | * This module defines the GDB target vector and its methods. | |
115 | */ | |
c906108c | 116 | |
136d6dae VP |
117 | static void procfs_attach (struct target_ops *, char *, int); |
118 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e PA |
119 | static void procfs_resume (struct target_ops *, |
120 | ptid_t, int, enum target_signal); | |
f9c72d52 | 121 | static void procfs_stop (ptid_t); |
a14ed312 | 122 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
123 | static void procfs_fetch_registers (struct target_ops *, |
124 | struct regcache *, int); | |
125 | static void procfs_store_registers (struct target_ops *, | |
126 | struct regcache *, int); | |
39f77062 | 127 | static void procfs_notice_signals (ptid_t); |
7d85a9c0 | 128 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae VP |
129 | static void procfs_mourn_inferior (struct target_ops *ops); |
130 | static void procfs_create_inferior (struct target_ops *, char *, | |
131 | char *, char **, int); | |
117de6a9 | 132 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 133 | ptid_t, struct target_waitstatus *, int); |
0b62613e | 134 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
135 | struct mem_attrib *attrib, |
136 | struct target_ops *); | |
4e73f23d RM |
137 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
138 | enum target_object object, | |
139 | const char *annex, | |
0b62613e | 140 | gdb_byte *readbuf, const gdb_byte *writebuf, |
4e73f23d | 141 | ULONGEST offset, LONGEST len); |
a14ed312 | 142 | |
28439f5e | 143 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 144 | |
28439f5e | 145 | void procfs_find_new_threads (struct target_ops *ops); |
117de6a9 | 146 | char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 147 | |
19958708 RM |
148 | static int proc_find_memory_regions (int (*) (CORE_ADDR, |
149 | unsigned long, | |
150 | int, int, int, | |
151 | void *), | |
be4d1333 MS |
152 | void *); |
153 | ||
154 | static char * procfs_make_note_section (bfd *, int *); | |
155 | ||
1e03ad20 KB |
156 | static int procfs_can_use_hw_breakpoint (int, int, int); |
157 | ||
c47ffbe3 VP |
158 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
159 | /* When GDB is built as 64-bit application on Solaris, the auxv data is | |
160 | presented in 64-bit format. We need to provide a custom parser to handle | |
161 | that. */ | |
162 | static int | |
163 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
164 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) | |
165 | { | |
e17a4113 | 166 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); |
c47ffbe3 VP |
167 | gdb_byte *ptr = *readptr; |
168 | ||
169 | if (endptr == ptr) | |
170 | return 0; | |
171 | ||
172 | if (endptr - ptr < 8 * 2) | |
173 | return -1; | |
174 | ||
e17a4113 | 175 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
176 | ptr += 8; |
177 | /* The size of data is always 64-bit. If the application is 32-bit, | |
178 | it will be zero extended, as expected. */ | |
e17a4113 | 179 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
180 | ptr += 8; |
181 | ||
182 | *readptr = ptr; | |
183 | return 1; | |
184 | } | |
185 | #endif | |
186 | ||
d1a7880c | 187 | struct target_ops * |
28439f5e | 188 | procfs_target (void) |
c3f6f71d | 189 | { |
28439f5e PA |
190 | struct target_ops *t = inf_child_target (); |
191 | ||
192 | t->to_shortname = "procfs"; | |
193 | t->to_longname = "Unix /proc child process"; | |
194 | t->to_doc = | |
c3f6f71d | 195 | "Unix /proc child process (started by the \"run\" command)."; |
28439f5e PA |
196 | t->to_create_inferior = procfs_create_inferior; |
197 | t->to_kill = procfs_kill_inferior; | |
198 | t->to_mourn_inferior = procfs_mourn_inferior; | |
199 | t->to_attach = procfs_attach; | |
200 | t->to_detach = procfs_detach; | |
201 | t->to_wait = procfs_wait; | |
202 | t->to_resume = procfs_resume; | |
203 | t->to_fetch_registers = procfs_fetch_registers; | |
204 | t->to_store_registers = procfs_store_registers; | |
205 | t->to_xfer_partial = procfs_xfer_partial; | |
206 | t->deprecated_xfer_memory = procfs_xfer_memory; | |
207 | t->to_notice_signals = procfs_notice_signals; | |
208 | t->to_files_info = procfs_files_info; | |
209 | t->to_stop = procfs_stop; | |
210 | ||
211 | t->to_find_new_threads = procfs_find_new_threads; | |
212 | t->to_thread_alive = procfs_thread_alive; | |
213 | t->to_pid_to_str = procfs_pid_to_str; | |
214 | ||
215 | t->to_has_thread_control = tc_schedlock; | |
216 | t->to_find_memory_regions = proc_find_memory_regions; | |
217 | t->to_make_corefile_notes = procfs_make_note_section; | |
c47ffbe3 VP |
218 | |
219 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 220 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
221 | #endif |
222 | ||
28439f5e PA |
223 | t->to_magic = OPS_MAGIC; |
224 | ||
225 | return t; | |
c3f6f71d | 226 | } |
c906108c | 227 | |
c3f6f71d JM |
228 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
229 | ||
c3f6f71d JM |
230 | /* |
231 | * World Unification: | |
232 | * | |
233 | * Put any typedefs, defines etc. here that are required for | |
234 | * the unification of code that handles different versions of /proc. | |
235 | */ | |
236 | ||
237 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 238 | #ifdef WA_READ |
19958708 | 239 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
240 | WRITE_WATCHFLAG = WA_WRITE, |
241 | EXEC_WATCHFLAG = WA_EXEC, | |
242 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
243 | }; | |
244 | #endif | |
245 | #else /* Irix method for watchpoints */ | |
19958708 | 246 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
247 | WRITE_WATCHFLAG = MA_WRITE, |
248 | EXEC_WATCHFLAG = MA_EXEC, | |
249 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
250 | }; | |
251 | #endif | |
252 | ||
37de36c6 KB |
253 | /* gdb_sigset_t */ |
254 | #ifdef HAVE_PR_SIGSET_T | |
255 | typedef pr_sigset_t gdb_sigset_t; | |
256 | #else | |
257 | typedef sigset_t gdb_sigset_t; | |
258 | #endif | |
259 | ||
260 | /* sigaction */ | |
261 | #ifdef HAVE_PR_SIGACTION64_T | |
262 | typedef pr_sigaction64_t gdb_sigaction_t; | |
263 | #else | |
264 | typedef struct sigaction gdb_sigaction_t; | |
265 | #endif | |
266 | ||
267 | /* siginfo */ | |
268 | #ifdef HAVE_PR_SIGINFO64_T | |
269 | typedef pr_siginfo64_t gdb_siginfo_t; | |
270 | #else | |
271 | typedef struct siginfo gdb_siginfo_t; | |
272 | #endif | |
273 | ||
3c95f01c JB |
274 | /* On mips-irix, praddset and prdelset are defined in such a way that |
275 | they return a value, which causes GCC to emit a -Wunused error | |
276 | because the returned value is not used. Prevent this warning | |
277 | by casting the return value to void. On sparc-solaris, this issue | |
278 | does not exist because the definition of these macros already include | |
279 | that cast to void. */ | |
280 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
281 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
282 | ||
37de36c6 KB |
283 | /* gdb_premptysysset */ |
284 | #ifdef premptysysset | |
285 | #define gdb_premptysysset premptysysset | |
286 | #else | |
287 | #define gdb_premptysysset premptyset | |
288 | #endif | |
289 | ||
290 | /* praddsysset */ | |
291 | #ifdef praddsysset | |
292 | #define gdb_praddsysset praddsysset | |
293 | #else | |
3c95f01c | 294 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
295 | #endif |
296 | ||
297 | /* prdelsysset */ | |
298 | #ifdef prdelsysset | |
299 | #define gdb_prdelsysset prdelsysset | |
300 | #else | |
3c95f01c | 301 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
302 | #endif |
303 | ||
304 | /* prissyssetmember */ | |
305 | #ifdef prissyssetmember | |
306 | #define gdb_pr_issyssetmember prissyssetmember | |
307 | #else | |
308 | #define gdb_pr_issyssetmember prismember | |
309 | #endif | |
310 | ||
311 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
312 | as intuitively descriptive as it could be, so we'll define | |
313 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
314 | this writing, this feature is only found on AIX5 systems and | |
315 | basically means that the set of syscalls is not fixed. I.e, | |
316 | there's no nice table that one can #include to get all of the | |
317 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
318 | for each process. We are at least guaranteed that they won't | |
319 | change over the lifetime of the process. But each process could | |
320 | (in theory) have different syscall numbers. | |
321 | */ | |
322 | #ifdef HAVE_PRSYSENT_T | |
323 | #define DYNAMIC_SYSCALLS | |
324 | #endif | |
c3f6f71d JM |
325 | |
326 | ||
327 | ||
328 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
329 | ||
330 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
331 | ||
332 | /* The procinfo struct is a wrapper to hold all the state information | |
333 | concerning a /proc process. There should be exactly one procinfo | |
334 | for each process, and since GDB currently can debug only one | |
335 | process at a time, that means there should be only one procinfo. | |
336 | All of the LWP's of a process can be accessed indirectly thru the | |
337 | single process procinfo. | |
338 | ||
339 | However, against the day when GDB may debug more than one process, | |
340 | this data structure is kept in a list (which for now will hold no | |
341 | more than one member), and many functions will have a pointer to a | |
342 | procinfo as an argument. | |
343 | ||
344 | There will be a separate procinfo structure for use by the (not yet | |
345 | implemented) "info proc" command, so that we can print useful | |
346 | information about any random process without interfering with the | |
347 | inferior's procinfo information. */ | |
348 | ||
349 | #ifdef NEW_PROC_API | |
350 | /* format strings for /proc paths */ | |
351 | # ifndef CTL_PROC_NAME_FMT | |
352 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
353 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
354 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
355 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
356 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
357 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
358 | # endif | |
359 | /* the name of the proc status struct depends on the implementation */ | |
360 | typedef pstatus_t gdb_prstatus_t; | |
361 | typedef lwpstatus_t gdb_lwpstatus_t; | |
362 | #else /* ! NEW_PROC_API */ | |
363 | /* format strings for /proc paths */ | |
364 | # ifndef CTL_PROC_NAME_FMT | |
365 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
366 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
367 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
368 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
369 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
370 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
371 | # endif | |
c906108c | 372 | /* the name of the proc status struct depends on the implementation */ |
c5aa993b | 373 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
374 | typedef prstatus_t gdb_lwpstatus_t; |
375 | #endif /* NEW_PROC_API */ | |
c906108c | 376 | |
c3f6f71d JM |
377 | typedef struct procinfo { |
378 | struct procinfo *next; | |
379 | int pid; /* Process ID */ | |
380 | int tid; /* Thread/LWP id */ | |
c906108c | 381 | |
c3f6f71d JM |
382 | /* process state */ |
383 | int was_stopped; | |
384 | int ignore_next_sigstop; | |
c906108c | 385 | |
19958708 | 386 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
387 | several different fd's, depending on the version of /proc |
388 | (old ioctl or new read/write). */ | |
c906108c | 389 | |
c3f6f71d JM |
390 | int ctl_fd; /* File descriptor for /proc control file */ |
391 | /* | |
392 | * The next three file descriptors are actually only needed in the | |
393 | * read/write, multiple-file-descriptor implemenation (NEW_PROC_API). | |
19958708 | 394 | * However, to avoid a bunch of #ifdefs in the code, we will use |
c3f6f71d JM |
395 | * them uniformly by (in the case of the ioctl single-file-descriptor |
396 | * implementation) filling them with copies of the control fd. | |
397 | */ | |
398 | int status_fd; /* File descriptor for /proc status file */ | |
399 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 400 | |
c3f6f71d | 401 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 402 | |
c3f6f71d | 403 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
404 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
405 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
406 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
407 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 408 | |
c3f6f71d | 409 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 410 | |
c3f6f71d JM |
411 | #ifndef NEW_PROC_API |
412 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 413 | #endif |
37de36c6 KB |
414 | |
415 | #ifdef DYNAMIC_SYSCALLS | |
416 | int num_syscalls; /* Total number of syscalls */ | |
417 | char **syscall_names; /* Syscall number to name map */ | |
418 | #endif | |
19958708 | 419 | |
c3f6f71d | 420 | struct procinfo *thread_list; |
c906108c | 421 | |
c3f6f71d JM |
422 | int status_valid : 1; |
423 | int gregs_valid : 1; | |
424 | int fpregs_valid : 1; | |
425 | int threads_valid: 1; | |
426 | } procinfo; | |
c906108c | 427 | |
c3f6f71d | 428 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 429 | |
c3f6f71d | 430 | /* Function prototypes for procinfo module: */ |
c906108c | 431 | |
a14ed312 KB |
432 | static procinfo *find_procinfo_or_die (int pid, int tid); |
433 | static procinfo *find_procinfo (int pid, int tid); | |
434 | static procinfo *create_procinfo (int pid, int tid); | |
435 | static void destroy_procinfo (procinfo * p); | |
004527cb | 436 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
437 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
438 | static int open_procinfo_files (procinfo * p, int which); | |
439 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
440 | static int sysset_t_size (procinfo *p); |
441 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
442 | #ifdef DYNAMIC_SYSCALLS | |
443 | static void load_syscalls (procinfo *pi); | |
444 | static void free_syscalls (procinfo *pi); | |
445 | static int find_syscall (procinfo *pi, char *name); | |
446 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 447 | |
c3f6f71d JM |
448 | /* The head of the procinfo list: */ |
449 | static procinfo * procinfo_list; | |
c906108c | 450 | |
c3f6f71d JM |
451 | /* |
452 | * Function: find_procinfo | |
453 | * | |
454 | * Search the procinfo list. | |
455 | * | |
456 | * Returns: pointer to procinfo, or NULL if not found. | |
457 | */ | |
c906108c | 458 | |
19958708 | 459 | static procinfo * |
fba45db2 | 460 | find_procinfo (int pid, int tid) |
c5aa993b | 461 | { |
c3f6f71d | 462 | procinfo *pi; |
c906108c | 463 | |
c3f6f71d JM |
464 | for (pi = procinfo_list; pi; pi = pi->next) |
465 | if (pi->pid == pid) | |
466 | break; | |
c906108c | 467 | |
c3f6f71d JM |
468 | if (pi) |
469 | if (tid) | |
470 | { | |
471 | /* Don't check threads_valid. If we're updating the | |
472 | thread_list, we want to find whatever threads are already | |
473 | here. This means that in general it is the caller's | |
474 | responsibility to check threads_valid and update before | |
475 | calling find_procinfo, if the caller wants to find a new | |
476 | thread. */ | |
477 | ||
478 | for (pi = pi->thread_list; pi; pi = pi->next) | |
479 | if (pi->tid == tid) | |
480 | break; | |
481 | } | |
c906108c | 482 | |
c3f6f71d JM |
483 | return pi; |
484 | } | |
c906108c | 485 | |
c3f6f71d JM |
486 | /* |
487 | * Function: find_procinfo_or_die | |
488 | * | |
489 | * Calls find_procinfo, but errors on failure. | |
490 | */ | |
c906108c | 491 | |
c3f6f71d | 492 | static procinfo * |
fba45db2 | 493 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
494 | { |
495 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 496 | |
c3f6f71d | 497 | if (pi == NULL) |
0fda6bd2 JM |
498 | { |
499 | if (tid) | |
8a3fe4f8 | 500 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), |
0fda6bd2 JM |
501 | pid, tid); |
502 | else | |
8a3fe4f8 | 503 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 504 | } |
c3f6f71d JM |
505 | return pi; |
506 | } | |
c906108c | 507 | |
4d1bcd09 KB |
508 | /* open_with_retry() is a wrapper for open(). The appropriate |
509 | open() call is attempted; if unsuccessful, it will be retried as | |
510 | many times as needed for the EAGAIN and EINTR conditions. | |
19958708 | 511 | |
4d1bcd09 KB |
512 | For other conditions, open_with_retry() will retry the open() a |
513 | limited number of times. In addition, a short sleep is imposed | |
514 | prior to retrying the open(). The reason for this sleep is to give | |
515 | the kernel a chance to catch up and create the file in question in | |
516 | the event that GDB "wins" the race to open a file before the kernel | |
517 | has created it. */ | |
19958708 | 518 | |
4d1bcd09 KB |
519 | static int |
520 | open_with_retry (const char *pathname, int flags) | |
521 | { | |
522 | int retries_remaining, status; | |
523 | ||
524 | retries_remaining = 2; | |
525 | ||
526 | while (1) | |
527 | { | |
528 | status = open (pathname, flags); | |
529 | ||
530 | if (status >= 0 || retries_remaining == 0) | |
531 | break; | |
532 | else if (errno != EINTR && errno != EAGAIN) | |
533 | { | |
534 | retries_remaining--; | |
535 | sleep (1); | |
536 | } | |
537 | } | |
538 | ||
539 | return status; | |
540 | } | |
541 | ||
c3f6f71d JM |
542 | /* |
543 | * Function: open_procinfo_files | |
544 | * | |
545 | * Open the file descriptor for the process or LWP. | |
546 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
547 | * the others are opened lazily as needed. | |
548 | * else (if not NEW_PROC_API), there is only one real | |
549 | * file descriptor, but we keep multiple copies of it so that | |
550 | * the code that uses them does not have to be #ifdef'd. | |
551 | * | |
552 | * Return: file descriptor, or zero for failure. | |
553 | */ | |
c906108c | 554 | |
c3f6f71d | 555 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 556 | |
c3f6f71d | 557 | static int |
fba45db2 | 558 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 559 | { |
0fda6bd2 | 560 | #ifdef NEW_PROC_API |
c3f6f71d | 561 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 562 | #endif |
c3f6f71d JM |
563 | int fd; |
564 | ||
19958708 | 565 | /* |
c3f6f71d JM |
566 | * This function is getting ALMOST long enough to break up into several. |
567 | * Here is some rationale: | |
568 | * | |
569 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
19958708 | 570 | * There are several file descriptors that may need to be open |
c3f6f71d JM |
571 | * for any given process or LWP. The ones we're intereted in are: |
572 | * - control (ctl) write-only change the state | |
573 | * - status (status) read-only query the state | |
574 | * - address space (as) read/write access memory | |
575 | * - map (map) read-only virtual addr map | |
576 | * Most of these are opened lazily as they are needed. | |
19958708 | 577 | * The pathnames for the 'files' for an LWP look slightly |
c3f6f71d JM |
578 | * different from those of a first-class process: |
579 | * Pathnames for a process (<proc-id>): | |
580 | * /proc/<proc-id>/ctl | |
581 | * /proc/<proc-id>/status | |
582 | * /proc/<proc-id>/as | |
583 | * /proc/<proc-id>/map | |
584 | * Pathnames for an LWP (lwp-id): | |
585 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
586 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
587 | * An LWP has no map or address space file descriptor, since | |
588 | * the memory map and address space are shared by all LWPs. | |
589 | * | |
590 | * Everyone else (Solaris 2.5, Irix, OSF) | |
591 | * There is only one file descriptor for each process or LWP. | |
592 | * For convenience, we copy the same file descriptor into all | |
593 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
594 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
19958708 | 595 | * doesn't need any #ifdef's. |
c3f6f71d JM |
596 | * Pathname for all: |
597 | * /proc/<proc-id> | |
598 | * | |
599 | * Solaris 2.5 LWP's: | |
19958708 | 600 | * Each LWP has an independent file descriptor, but these |
c3f6f71d JM |
601 | * are not obtained via the 'open' system call like the rest: |
602 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
603 | * to the file descriptor of the parent process. | |
604 | * | |
605 | * OSF threads: | |
606 | * These do not even have their own independent file descriptor. | |
607 | * All operations are carried out on the file descriptor of the | |
608 | * parent process. Therefore we just call open again for each | |
609 | * thread, getting a new handle for the same 'file'. | |
610 | */ | |
611 | ||
612 | #ifdef NEW_PROC_API | |
613 | /* | |
614 | * In this case, there are several different file descriptors that | |
615 | * we might be asked to open. The control file descriptor will be | |
616 | * opened early, but the others will be opened lazily as they are | |
617 | * needed. | |
618 | */ | |
619 | ||
620 | strcpy (tmp, pi->pathname); | |
621 | switch (which) { /* which file descriptor to open? */ | |
622 | case FD_CTL: | |
623 | if (pi->tid) | |
624 | strcat (tmp, "/lwpctl"); | |
625 | else | |
626 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 627 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
628 | if (fd <= 0) |
629 | return 0; /* fail */ | |
630 | pi->ctl_fd = fd; | |
631 | break; | |
632 | case FD_AS: | |
633 | if (pi->tid) | |
634 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
635 | strcat (tmp, "/as"); | |
4d1bcd09 | 636 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
637 | if (fd <= 0) |
638 | return 0; /* fail */ | |
639 | pi->as_fd = fd; | |
640 | break; | |
641 | case FD_STATUS: | |
642 | if (pi->tid) | |
643 | strcat (tmp, "/lwpstatus"); | |
644 | else | |
645 | strcat (tmp, "/status"); | |
4d1bcd09 | 646 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
647 | if (fd <= 0) |
648 | return 0; /* fail */ | |
649 | pi->status_fd = fd; | |
650 | break; | |
651 | default: | |
652 | return 0; /* unknown file descriptor */ | |
653 | } | |
654 | #else /* not NEW_PROC_API */ | |
655 | /* | |
656 | * In this case, there is only one file descriptor for each procinfo | |
657 | * (ie. each process or LWP). In fact, only the file descriptor for | |
658 | * the process can actually be opened by an 'open' system call. | |
19958708 RM |
659 | * The ones for the LWPs have to be obtained thru an IOCTL call |
660 | * on the process's file descriptor. | |
c3f6f71d JM |
661 | * |
662 | * For convenience, we copy each procinfo's single file descriptor | |
19958708 | 663 | * into all of the fields occupied by the several file descriptors |
c3f6f71d JM |
664 | * of the NEW_PROC_API implementation. That way, the code that uses |
665 | * them can be written without ifdefs. | |
666 | */ | |
667 | ||
668 | ||
669 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
670 | /* Only one FD; just open it. */ |
671 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
672 | return 0; |
673 | #else /* Sol 2.5, Irix, other? */ | |
674 | if (pi->tid == 0) /* Master procinfo for the process */ | |
675 | { | |
4d1bcd09 | 676 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
677 | if (fd <= 0) |
678 | return 0; /* fail */ | |
679 | } | |
680 | else /* LWP thread procinfo */ | |
681 | { | |
682 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
683 | procinfo *process; | |
684 | int lwpid = pi->tid; | |
685 | ||
686 | /* Find the procinfo for the entire process. */ | |
687 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
688 | return 0; /* fail */ | |
689 | ||
690 | /* Now obtain the file descriptor for the LWP. */ | |
691 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
692 | return 0; /* fail */ | |
693 | #else /* Irix, other? */ | |
694 | return 0; /* Don't know how to open threads */ | |
695 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
696 | } | |
697 | #endif /* OSF PIOCTSTATUS */ | |
698 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
699 | #endif /* NEW_PROC_API */ | |
c906108c | 700 | |
c3f6f71d JM |
701 | return 1; /* success */ |
702 | } | |
c906108c | 703 | |
c3f6f71d JM |
704 | /* |
705 | * Function: create_procinfo | |
706 | * | |
707 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 708 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
709 | * |
710 | * Return: pointer to new procinfo struct. | |
711 | */ | |
c906108c | 712 | |
c3f6f71d | 713 | static procinfo * |
fba45db2 | 714 | create_procinfo (int pid, int tid) |
c3f6f71d | 715 | { |
0b62613e | 716 | procinfo *pi, *parent = NULL; |
c906108c | 717 | |
0d06e24b | 718 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 719 | return pi; /* Already exists, nothing to do. */ |
c906108c | 720 | |
c3f6f71d JM |
721 | /* find parent before doing malloc, to save having to cleanup */ |
722 | if (tid != 0) | |
723 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
724 | create it if it | |
725 | doesn't exist yet? */ | |
c906108c | 726 | |
c3f6f71d JM |
727 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
728 | memset (pi, 0, sizeof (procinfo)); | |
729 | pi->pid = pid; | |
730 | pi->tid = tid; | |
c906108c | 731 | |
37de36c6 KB |
732 | #ifdef DYNAMIC_SYSCALLS |
733 | load_syscalls (pi); | |
734 | #endif | |
735 | ||
1d5e0602 KB |
736 | pi->saved_entryset = sysset_t_alloc (pi); |
737 | pi->saved_exitset = sysset_t_alloc (pi); | |
738 | ||
c3f6f71d JM |
739 | /* Chain into list. */ |
740 | if (tid == 0) | |
741 | { | |
742 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
743 | pi->next = procinfo_list; | |
744 | procinfo_list = pi; | |
745 | } | |
746 | else | |
747 | { | |
748 | #ifdef NEW_PROC_API | |
749 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
750 | #else | |
751 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
752 | #endif | |
753 | pi->next = parent->thread_list; | |
754 | parent->thread_list = pi; | |
755 | } | |
756 | return pi; | |
757 | } | |
c906108c | 758 | |
c3f6f71d JM |
759 | /* |
760 | * Function: close_procinfo_files | |
761 | * | |
762 | * Close all file descriptors associated with the procinfo | |
763 | */ | |
c906108c | 764 | |
c3f6f71d | 765 | static void |
fba45db2 | 766 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
767 | { |
768 | if (pi->ctl_fd > 0) | |
769 | close (pi->ctl_fd); | |
770 | #ifdef NEW_PROC_API | |
771 | if (pi->as_fd > 0) | |
772 | close (pi->as_fd); | |
773 | if (pi->status_fd > 0) | |
774 | close (pi->status_fd); | |
775 | #endif | |
776 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
777 | } | |
c906108c | 778 | |
c3f6f71d JM |
779 | /* |
780 | * Function: destroy_procinfo | |
781 | * | |
782 | * Destructor function. Close, unlink and deallocate the object. | |
783 | */ | |
c906108c | 784 | |
c3f6f71d | 785 | static void |
fba45db2 | 786 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
787 | { |
788 | procinfo *ptr; | |
789 | ||
790 | /* Step one: unlink the procinfo from its list */ | |
791 | if (pi == *list) | |
792 | *list = pi->next; | |
19958708 | 793 | else |
c3f6f71d JM |
794 | for (ptr = *list; ptr; ptr = ptr->next) |
795 | if (ptr->next == pi) | |
796 | { | |
797 | ptr->next = pi->next; | |
798 | break; | |
799 | } | |
7a292a7a | 800 | |
c3f6f71d JM |
801 | /* Step two: close any open file descriptors */ |
802 | close_procinfo_files (pi); | |
7a292a7a | 803 | |
c3f6f71d | 804 | /* Step three: free the memory. */ |
37de36c6 KB |
805 | #ifdef DYNAMIC_SYSCALLS |
806 | free_syscalls (pi); | |
807 | #endif | |
1d5e0602 KB |
808 | xfree (pi->saved_entryset); |
809 | xfree (pi->saved_exitset); | |
b8c9b27d | 810 | xfree (pi); |
c3f6f71d | 811 | } |
c906108c | 812 | |
c3f6f71d | 813 | static void |
fba45db2 | 814 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
815 | { |
816 | procinfo *tmp; | |
c906108c | 817 | |
c3f6f71d JM |
818 | if (pi->tid != 0) /* destroy a thread procinfo */ |
819 | { | |
820 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
821 | destroy_one_procinfo (&tmp->thread_list, pi); | |
822 | } | |
823 | else /* destroy a process procinfo and all its threads */ | |
824 | { | |
825 | /* First destroy the children, if any; */ | |
826 | while (pi->thread_list != NULL) | |
827 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
828 | /* Then destroy the parent. Genocide!!! */ | |
829 | destroy_one_procinfo (&procinfo_list, pi); | |
830 | } | |
831 | } | |
c906108c | 832 | |
004527cb AC |
833 | static void |
834 | do_destroy_procinfo_cleanup (void *pi) | |
835 | { | |
836 | destroy_procinfo (pi); | |
837 | } | |
838 | ||
c3f6f71d | 839 | enum { NOKILL, KILL }; |
c906108c | 840 | |
c3f6f71d JM |
841 | /* |
842 | * Function: dead_procinfo | |
843 | * | |
844 | * To be called on a non_recoverable error for a procinfo. | |
845 | * Prints error messages, optionally sends a SIGKILL to the process, | |
846 | * then destroys the data structure. | |
847 | */ | |
c906108c | 848 | |
c3f6f71d | 849 | static void |
fba45db2 | 850 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
851 | { |
852 | char procfile[80]; | |
c906108c | 853 | |
c3f6f71d JM |
854 | if (pi->pathname) |
855 | { | |
856 | print_sys_errmsg (pi->pathname, errno); | |
857 | } | |
858 | else | |
859 | { | |
860 | sprintf (procfile, "process %d", pi->pid); | |
861 | print_sys_errmsg (procfile, errno); | |
862 | } | |
863 | if (kill_p == KILL) | |
864 | kill (pi->pid, SIGKILL); | |
c906108c | 865 | |
c3f6f71d | 866 | destroy_procinfo (pi); |
0b62613e | 867 | error ("%s", msg); |
c3f6f71d | 868 | } |
c906108c | 869 | |
37de36c6 KB |
870 | /* |
871 | * Function: sysset_t_size | |
872 | * | |
873 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
874 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
875 | * size of sysset_t isn't known until runtime. | |
876 | */ | |
877 | ||
878 | static int | |
879 | sysset_t_size (procinfo * pi) | |
880 | { | |
881 | #ifndef DYNAMIC_SYSCALLS | |
882 | return sizeof (sysset_t); | |
883 | #else | |
884 | return sizeof (sysset_t) - sizeof (uint64_t) | |
885 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
886 | / (8 * sizeof (uint64_t))); | |
887 | #endif | |
888 | } | |
889 | ||
890 | /* Function: sysset_t_alloc | |
19958708 | 891 | |
37de36c6 KB |
892 | Allocate and (partially) initialize a sysset_t struct. */ |
893 | ||
894 | static sysset_t * | |
895 | sysset_t_alloc (procinfo * pi) | |
896 | { | |
897 | sysset_t *ret; | |
898 | int size = sysset_t_size (pi); | |
899 | ret = xmalloc (size); | |
900 | #ifdef DYNAMIC_SYSCALLS | |
901 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
902 | / (8 * sizeof (uint64_t)); | |
903 | #endif | |
904 | return ret; | |
905 | } | |
906 | ||
907 | #ifdef DYNAMIC_SYSCALLS | |
908 | ||
909 | /* Function: load_syscalls | |
19958708 | 910 | |
37de36c6 KB |
911 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
912 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
913 | with the names. (Certain numbers may be skipped in which case the | |
914 | names for these numbers will be left as NULL.) */ | |
915 | ||
916 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
917 | #define MAX_SYSCALLS 65536 | |
918 | ||
919 | static void | |
920 | load_syscalls (procinfo *pi) | |
921 | { | |
922 | char pathname[MAX_PROC_NAME_SIZE]; | |
923 | int sysent_fd; | |
924 | prsysent_t header; | |
925 | prsyscall_t *syscalls; | |
926 | int i, size, maxcall; | |
927 | ||
928 | pi->num_syscalls = 0; | |
929 | pi->syscall_names = 0; | |
930 | ||
931 | /* Open the file descriptor for the sysent file */ | |
932 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 933 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
934 | if (sysent_fd < 0) |
935 | { | |
8a3fe4f8 | 936 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
937 | } |
938 | ||
939 | size = sizeof header - sizeof (prsyscall_t); | |
940 | if (read (sysent_fd, &header, size) != size) | |
941 | { | |
8a3fe4f8 | 942 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
943 | } |
944 | ||
945 | if (header.pr_nsyscalls == 0) | |
946 | { | |
8a3fe4f8 | 947 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); |
37de36c6 KB |
948 | } |
949 | ||
950 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
951 | syscalls = xmalloc (size); | |
952 | ||
953 | if (read (sysent_fd, syscalls, size) != size) | |
954 | { | |
955 | xfree (syscalls); | |
8a3fe4f8 | 956 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
957 | } |
958 | ||
959 | /* Find maximum syscall number. This may not be the same as | |
960 | pr_nsyscalls since that value refers to the number of entries | |
961 | in the table. (Also, the docs indicate that some system | |
962 | call numbers may be skipped.) */ | |
963 | ||
964 | maxcall = syscalls[0].pr_number; | |
965 | ||
966 | for (i = 1; i < header.pr_nsyscalls; i++) | |
967 | if (syscalls[i].pr_number > maxcall | |
968 | && syscalls[i].pr_nameoff > 0 | |
969 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
970 | maxcall = syscalls[i].pr_number; | |
971 | ||
972 | pi->num_syscalls = maxcall+1; | |
973 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
974 | ||
975 | for (i = 0; i < pi->num_syscalls; i++) | |
976 | pi->syscall_names[i] = NULL; | |
977 | ||
978 | /* Read the syscall names in */ | |
979 | for (i = 0; i < header.pr_nsyscalls; i++) | |
980 | { | |
981 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
982 | int nread; | |
983 | int callnum; | |
984 | ||
985 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
986 | || syscalls[i].pr_number < 0 | |
987 | || syscalls[i].pr_nameoff <= 0 | |
988 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
989 | != (off_t) syscalls[i].pr_nameoff)) | |
990 | continue; | |
991 | ||
992 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
993 | if (nread <= 0) | |
994 | continue; | |
995 | ||
996 | callnum = syscalls[i].pr_number; | |
997 | ||
998 | if (pi->syscall_names[callnum] != NULL) | |
999 | { | |
1000 | /* FIXME: Generate warning */ | |
1001 | continue; | |
1002 | } | |
1003 | ||
1004 | namebuf[nread-1] = '\0'; | |
1005 | size = strlen (namebuf) + 1; | |
1006 | pi->syscall_names[callnum] = xmalloc (size); | |
1007 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
1008 | pi->syscall_names[callnum][size-1] = '\0'; | |
1009 | } | |
19958708 | 1010 | |
37de36c6 KB |
1011 | close (sysent_fd); |
1012 | xfree (syscalls); | |
1013 | } | |
1014 | ||
1015 | /* Function: free_syscalls | |
19958708 | 1016 | |
37de36c6 KB |
1017 | Free the space allocated for the syscall names from the procinfo |
1018 | structure. */ | |
1019 | ||
1020 | static void | |
1021 | free_syscalls (procinfo *pi) | |
1022 | { | |
1023 | if (pi->syscall_names) | |
1024 | { | |
1025 | int i; | |
1026 | ||
1027 | for (i = 0; i < pi->num_syscalls; i++) | |
1028 | if (pi->syscall_names[i] != NULL) | |
1029 | xfree (pi->syscall_names[i]); | |
1030 | ||
1031 | xfree (pi->syscall_names); | |
1032 | pi->syscall_names = 0; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | /* Function: find_syscall | |
1037 | ||
1038 | Given a name, look up (and return) the corresponding syscall number. | |
1039 | If no match is found, return -1. */ | |
19958708 | 1040 | |
37de36c6 KB |
1041 | static int |
1042 | find_syscall (procinfo *pi, char *name) | |
1043 | { | |
1044 | int i; | |
1045 | for (i = 0; i < pi->num_syscalls; i++) | |
1046 | { | |
1047 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1048 | return i; | |
1049 | } | |
1050 | return -1; | |
1051 | } | |
1052 | #endif | |
1053 | ||
c3f6f71d | 1054 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1055 | |
c3f6f71d | 1056 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1057 | |
c3f6f71d JM |
1058 | /* |
1059 | * This "module" is the interface layer between the /proc system API | |
19958708 | 1060 | * and the gdb target vector functions. This layer consists of |
c3f6f71d JM |
1061 | * access functions that encapsulate each of the basic operations |
1062 | * that we need to use from the /proc API. | |
1063 | * | |
1064 | * The main motivation for this layer is to hide the fact that | |
1065 | * there are two very different implementations of the /proc API. | |
1066 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1067 | * functions, we do our best to hide them all in here. | |
1068 | */ | |
c906108c | 1069 | |
a14ed312 KB |
1070 | int proc_get_status (procinfo * pi); |
1071 | long proc_flags (procinfo * pi); | |
1072 | int proc_why (procinfo * pi); | |
1073 | int proc_what (procinfo * pi); | |
1074 | int proc_set_run_on_last_close (procinfo * pi); | |
1075 | int proc_unset_run_on_last_close (procinfo * pi); | |
1076 | int proc_set_inherit_on_fork (procinfo * pi); | |
1077 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1078 | int proc_set_async (procinfo * pi); | |
1079 | int proc_unset_async (procinfo * pi); | |
1080 | int proc_stop_process (procinfo * pi); | |
1081 | int proc_trace_signal (procinfo * pi, int signo); | |
1082 | int proc_ignore_signal (procinfo * pi, int signo); | |
1083 | int proc_clear_current_fault (procinfo * pi); | |
1084 | int proc_set_current_signal (procinfo * pi, int signo); | |
1085 | int proc_clear_current_signal (procinfo * pi); | |
1086 | int proc_set_gregs (procinfo * pi); | |
1087 | int proc_set_fpregs (procinfo * pi); | |
1088 | int proc_wait_for_stop (procinfo * pi); | |
1089 | int proc_run_process (procinfo * pi, int step, int signo); | |
1090 | int proc_kill (procinfo * pi, int signo); | |
1091 | int proc_parent_pid (procinfo * pi); | |
1092 | int proc_get_nthreads (procinfo * pi); | |
1093 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1094 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1095 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1096 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1097 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1098 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1099 | |
1100 | int proc_update_threads (procinfo * pi); | |
1101 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1102 | int (*func) (procinfo *, procinfo *, void *), |
1103 | void *ptr); | |
a14ed312 KB |
1104 | |
1105 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1106 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1107 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1108 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1109 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1110 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1111 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1112 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1113 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1114 | |
1115 | void proc_warn (procinfo * pi, char *func, int line); | |
1116 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1117 | |
c3f6f71d | 1118 | void |
fba45db2 | 1119 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1120 | { |
1121 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1122 | print_sys_errmsg (errmsg, errno); | |
1123 | } | |
c906108c | 1124 | |
c3f6f71d | 1125 | void |
fba45db2 | 1126 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1127 | { |
1128 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1129 | perror_with_name (errmsg); | |
1130 | } | |
c906108c | 1131 | |
c3f6f71d JM |
1132 | /* |
1133 | * Function: proc_get_status | |
1134 | * | |
1135 | * Updates the status struct in the procinfo. | |
1136 | * There is a 'valid' flag, to let other functions know when | |
1137 | * this function needs to be called (so the status is only | |
1138 | * read when it is needed). The status file descriptor is | |
1139 | * also only opened when it is needed. | |
1140 | * | |
1141 | * Return: non-zero for success, zero for failure. | |
1142 | */ | |
c906108c | 1143 | |
c3f6f71d | 1144 | int |
fba45db2 | 1145 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1146 | { |
1147 | /* Status file descriptor is opened "lazily" */ | |
1148 | if (pi->status_fd == 0 && | |
1149 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1150 | { | |
1151 | pi->status_valid = 0; | |
1152 | return 0; | |
1153 | } | |
c906108c | 1154 | |
c3f6f71d JM |
1155 | #ifdef NEW_PROC_API |
1156 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1157 | pi->status_valid = 0; /* fail */ | |
1158 | else | |
1159 | { | |
19958708 | 1160 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1161 | depending on whether this is a main process or an LWP. */ |
1162 | if (pi->tid) | |
19958708 RM |
1163 | pi->status_valid = (read (pi->status_fd, |
1164 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1165 | sizeof (lwpstatus_t)) |
1166 | == sizeof (lwpstatus_t)); | |
1167 | else | |
1168 | { | |
19958708 | 1169 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1170 | (char *) &pi->prstatus, |
1171 | sizeof (gdb_prstatus_t)) | |
1172 | == sizeof (gdb_prstatus_t)); | |
1173 | #if 0 /*def UNIXWARE*/ | |
1174 | if (pi->status_valid && | |
1175 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1176 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1177 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1178 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1179 | (char *) &pi->prstatus, |
1180 | sizeof (gdb_prstatus_t)) | |
1181 | == sizeof (gdb_prstatus_t)); | |
1182 | #endif /* UNIXWARE */ | |
1183 | } | |
1184 | } | |
1185 | #else /* ioctl method */ | |
1186 | #ifdef PIOCTSTATUS /* osf */ | |
1187 | if (pi->tid == 0) /* main process */ | |
1188 | { | |
1189 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1190 | pi->status_valid = |
c3f6f71d JM |
1191 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | int win; | |
1196 | struct { | |
1197 | long pr_count; | |
1198 | tid_t pr_error_thread; | |
1199 | struct prstatus status; | |
1200 | } thread_status; | |
1201 | ||
1202 | thread_status.pr_count = 1; | |
1203 | thread_status.status.pr_tid = pi->tid; | |
1204 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1205 | if (win) | |
1206 | { | |
19958708 | 1207 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1208 | sizeof (pi->prstatus)); |
1209 | pi->status_valid = 1; | |
1210 | } | |
1211 | } | |
1212 | #else | |
1213 | /* Just read the danged status. Now isn't that simple? */ | |
1214 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1215 | #endif | |
1216 | #endif | |
c906108c | 1217 | |
c3f6f71d JM |
1218 | if (pi->status_valid) |
1219 | { | |
19958708 | 1220 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1221 | proc_why (pi), |
19958708 | 1222 | proc_what (pi), |
c3f6f71d JM |
1223 | proc_get_current_thread (pi)); |
1224 | } | |
c906108c | 1225 | |
c3f6f71d JM |
1226 | /* The status struct includes general regs, so mark them valid too */ |
1227 | pi->gregs_valid = pi->status_valid; | |
1228 | #ifdef NEW_PROC_API | |
19958708 | 1229 | /* In the read/write multiple-fd model, |
c3f6f71d JM |
1230 | the status struct includes the fp regs too, so mark them valid too */ |
1231 | pi->fpregs_valid = pi->status_valid; | |
1232 | #endif | |
1233 | return pi->status_valid; /* True if success, false if failure. */ | |
1234 | } | |
c906108c | 1235 | |
c3f6f71d JM |
1236 | /* |
1237 | * Function: proc_flags | |
1238 | * | |
1239 | * returns the process flags (pr_flags field). | |
19958708 | 1240 | */ |
c3f6f71d JM |
1241 | |
1242 | long | |
fba45db2 | 1243 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1244 | { |
1245 | if (!pi->status_valid) | |
1246 | if (!proc_get_status (pi)) | |
1247 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1248 | |
c3f6f71d | 1249 | #ifdef NEW_PROC_API |
0d06e24b JM |
1250 | # ifdef UNIXWARE |
1251 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1252 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1253 | The two sets of flags don't overlap. */ | |
1254 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1255 | # else | |
c3f6f71d | 1256 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1257 | # endif |
c3f6f71d JM |
1258 | #else |
1259 | return pi->prstatus.pr_flags; | |
1260 | #endif | |
1261 | } | |
c906108c | 1262 | |
c3f6f71d JM |
1263 | /* |
1264 | * Function: proc_why | |
1265 | * | |
1266 | * returns the pr_why field (why the process stopped). | |
1267 | */ | |
c906108c | 1268 | |
c3f6f71d | 1269 | int |
fba45db2 | 1270 | proc_why (procinfo *pi) |
c3f6f71d JM |
1271 | { |
1272 | if (!pi->status_valid) | |
1273 | if (!proc_get_status (pi)) | |
1274 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1275 | |
c3f6f71d JM |
1276 | #ifdef NEW_PROC_API |
1277 | return pi->prstatus.pr_lwp.pr_why; | |
1278 | #else | |
1279 | return pi->prstatus.pr_why; | |
1280 | #endif | |
1281 | } | |
c906108c | 1282 | |
c3f6f71d JM |
1283 | /* |
1284 | * Function: proc_what | |
1285 | * | |
1286 | * returns the pr_what field (details of why the process stopped). | |
1287 | */ | |
c906108c | 1288 | |
c3f6f71d | 1289 | int |
fba45db2 | 1290 | proc_what (procinfo *pi) |
c3f6f71d JM |
1291 | { |
1292 | if (!pi->status_valid) | |
1293 | if (!proc_get_status (pi)) | |
1294 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1295 | |
c3f6f71d JM |
1296 | #ifdef NEW_PROC_API |
1297 | return pi->prstatus.pr_lwp.pr_what; | |
1298 | #else | |
1299 | return pi->prstatus.pr_what; | |
c906108c | 1300 | #endif |
c3f6f71d | 1301 | } |
c906108c | 1302 | |
c3f6f71d JM |
1303 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1304 | /* | |
1305 | * Function: proc_nsysarg | |
1306 | * | |
1307 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1308 | */ | |
1309 | ||
1310 | int | |
fba45db2 | 1311 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1312 | { |
1313 | if (!pi->status_valid) | |
1314 | if (!proc_get_status (pi)) | |
1315 | return 0; | |
19958708 | 1316 | |
c3f6f71d JM |
1317 | #ifdef NEW_PROC_API |
1318 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1319 | #else | |
1320 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1321 | #endif |
c3f6f71d | 1322 | } |
c906108c | 1323 | |
c3f6f71d JM |
1324 | /* |
1325 | * Function: proc_sysargs | |
1326 | * | |
1327 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1328 | */ | |
c906108c | 1329 | |
c3f6f71d | 1330 | long * |
fba45db2 | 1331 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1332 | { |
1333 | if (!pi->status_valid) | |
1334 | if (!proc_get_status (pi)) | |
1335 | return NULL; | |
19958708 | 1336 | |
c3f6f71d JM |
1337 | #ifdef NEW_PROC_API |
1338 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1339 | #else | |
1340 | return (long *) &pi->prstatus.pr_sysarg; | |
1341 | #endif | |
1342 | } | |
c906108c | 1343 | |
c3f6f71d JM |
1344 | /* |
1345 | * Function: proc_syscall | |
1346 | * | |
1347 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1348 | */ | |
c906108c | 1349 | |
c3f6f71d | 1350 | int |
fba45db2 | 1351 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1352 | { |
1353 | if (!pi->status_valid) | |
1354 | if (!proc_get_status (pi)) | |
1355 | return 0; | |
19958708 | 1356 | |
c3f6f71d JM |
1357 | #ifdef NEW_PROC_API |
1358 | return pi->prstatus.pr_lwp.pr_syscall; | |
1359 | #else | |
1360 | return pi->prstatus.pr_syscall; | |
1361 | #endif | |
1362 | } | |
1363 | #endif /* PIOCSSPCACT */ | |
c906108c | 1364 | |
c3f6f71d JM |
1365 | /* |
1366 | * Function: proc_cursig: | |
1367 | * | |
1368 | * returns the pr_cursig field (current signal). | |
1369 | */ | |
c906108c | 1370 | |
c3f6f71d JM |
1371 | long |
1372 | proc_cursig (struct procinfo *pi) | |
1373 | { | |
1374 | if (!pi->status_valid) | |
1375 | if (!proc_get_status (pi)) | |
1376 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1377 | |
c3f6f71d JM |
1378 | #ifdef NEW_PROC_API |
1379 | return pi->prstatus.pr_lwp.pr_cursig; | |
1380 | #else | |
1381 | return pi->prstatus.pr_cursig; | |
1382 | #endif | |
1383 | } | |
c906108c | 1384 | |
c3f6f71d | 1385 | /* |
19958708 | 1386 | * Function: proc_modify_flag |
c3f6f71d | 1387 | * |
19958708 | 1388 | * === I appologize for the messiness of this function. |
c3f6f71d JM |
1389 | * === This is an area where the different versions of |
1390 | * === /proc are more inconsistent than usual. MVS | |
1391 | * | |
1392 | * Set or reset any of the following process flags: | |
1393 | * PR_FORK -- forked child will inherit trace flags | |
1394 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1395 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1396 | * PR_ASYNC -- LWP's get to run/stop independently. |
1397 | * | |
1398 | * There are three methods for doing this function: | |
1399 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1400 | * [Sol6, Sol7, UW] | |
1401 | * 2) Middle: PIOCSET/PIOCRESET | |
1402 | * [Irix, Sol5] | |
1403 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1404 | * [OSF, Sol5] | |
1405 | * | |
1406 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1407 | * Note: OSF does not define PR_KLC. |
1408 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d | 1409 | * |
19958708 | 1410 | * Arguments: |
c3f6f71d JM |
1411 | * pi -- the procinfo |
1412 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1413 | * mode -- 1 for set, 0 for reset. | |
1414 | * | |
1415 | * Returns non-zero for success, zero for failure. | |
1416 | */ | |
c906108c | 1417 | |
c3f6f71d | 1418 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1419 | |
c3f6f71d | 1420 | static int |
fba45db2 | 1421 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1422 | { |
1423 | long win = 0; /* default to fail */ | |
1424 | ||
19958708 RM |
1425 | /* |
1426 | * These operations affect the process as a whole, and applying | |
1427 | * them to an individual LWP has the same meaning as applying them | |
1428 | * to the main process. Therefore, if we're ever called with a | |
1429 | * pointer to an LWP's procinfo, let's substitute the process's | |
1430 | * procinfo and avoid opening the LWP's file descriptor | |
1431 | * unnecessarily. | |
c3f6f71d JM |
1432 | */ |
1433 | ||
1434 | if (pi->pid != 0) | |
1435 | pi = find_procinfo_or_die (pi->pid, 0); | |
1436 | ||
1437 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1438 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1439 | (which for no obvious reason has a different definition |
1440 | from one operating system to the next...) */ | |
1441 | #ifdef PCUNSET | |
1442 | #define GDBRESET PCUNSET | |
37de36c6 | 1443 | #else |
c3f6f71d JM |
1444 | #ifdef PCRESET |
1445 | #define GDBRESET PCRESET | |
37de36c6 | 1446 | #endif |
c906108c | 1447 | #endif |
c3f6f71d | 1448 | { |
37de36c6 | 1449 | procfs_ctl_t arg[2]; |
c906108c | 1450 | |
c3f6f71d JM |
1451 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1452 | arg[0] = PCSET; | |
1453 | else /* Reset the flag */ | |
1454 | arg[0] = GDBRESET; | |
c5aa993b | 1455 | |
c3f6f71d JM |
1456 | arg[1] = flag; |
1457 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1458 | } | |
1459 | #else | |
1460 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1461 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1462 | { | |
1463 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1464 | } | |
1465 | else /* Reset the flag */ | |
1466 | { | |
1467 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1468 | } | |
c906108c | 1469 | |
c3f6f71d JM |
1470 | #else |
1471 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1472 | switch (flag) { | |
1473 | case PR_RLC: | |
1474 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1475 | { | |
1476 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1477 | } | |
1478 | else /* Clear run-on-last-close */ | |
1479 | { | |
1480 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1481 | } | |
1482 | break; | |
1483 | case PR_FORK: | |
1484 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1485 | { | |
1486 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1487 | } | |
1488 | else /* Clear inherit-on-fork */ | |
1489 | { | |
1490 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1491 | } | |
1492 | break; | |
1493 | default: | |
1494 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1495 | break; | |
1496 | } | |
1497 | #endif | |
1498 | #endif | |
1499 | #endif | |
1500 | #undef GDBRESET | |
1501 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1502 | pi->status_valid = 0; | |
c906108c | 1503 | |
c3f6f71d | 1504 | if (!win) |
8a3fe4f8 | 1505 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1506 | flag == PR_FORK ? "PR_FORK" : |
1507 | flag == PR_RLC ? "PR_RLC" : | |
1508 | #ifdef PR_ASYNC | |
1509 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1510 | #endif |
1511 | #ifdef PR_KLC | |
1512 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1513 | #endif |
1514 | "<unknown flag>", | |
1515 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1516 | |
c3f6f71d JM |
1517 | return win; |
1518 | } | |
c906108c | 1519 | |
c3f6f71d JM |
1520 | /* |
1521 | * Function: proc_set_run_on_last_close | |
1522 | * | |
1523 | * Set the run_on_last_close flag. | |
1524 | * Process with all threads will become runnable | |
1525 | * when debugger closes all /proc fds. | |
1526 | * | |
1527 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1528 | */ |
1529 | ||
c3f6f71d | 1530 | int |
fba45db2 | 1531 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1532 | { |
c3f6f71d JM |
1533 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1534 | } | |
c906108c | 1535 | |
c3f6f71d JM |
1536 | /* |
1537 | * Function: proc_unset_run_on_last_close | |
1538 | * | |
1539 | * Reset the run_on_last_close flag. | |
1540 | * Process will NOT become runnable | |
1541 | * when debugger closes its file handles. | |
1542 | * | |
1543 | * Returns non-zero for success, zero for failure. | |
1544 | */ | |
c906108c | 1545 | |
c3f6f71d | 1546 | int |
fba45db2 | 1547 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1548 | { |
1549 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1550 | } |
1551 | ||
0d06e24b JM |
1552 | #ifdef PR_KLC |
1553 | /* | |
1554 | * Function: proc_set_kill_on_last_close | |
1555 | * | |
1556 | * Set the kill_on_last_close flag. | |
1557 | * Process with all threads will be killed when debugger | |
1558 | * closes all /proc fds (or debugger exits or dies). | |
1559 | * | |
1560 | * Returns non-zero for success, zero for failure. | |
1561 | */ | |
1562 | ||
1563 | int | |
fba45db2 | 1564 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1565 | { |
1566 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * Function: proc_unset_kill_on_last_close | |
1571 | * | |
1572 | * Reset the kill_on_last_close flag. | |
19958708 | 1573 | * Process will NOT be killed when debugger |
0d06e24b JM |
1574 | * closes its file handles (or exits or dies). |
1575 | * | |
1576 | * Returns non-zero for success, zero for failure. | |
1577 | */ | |
1578 | ||
1579 | int | |
fba45db2 | 1580 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1581 | { |
1582 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1583 | } | |
1584 | #endif /* PR_KLC */ | |
1585 | ||
c906108c | 1586 | /* |
c3f6f71d JM |
1587 | * Function: proc_set_inherit_on_fork |
1588 | * | |
1589 | * Set inherit_on_fork flag. | |
1590 | * If the process forks a child while we are registered for events | |
1591 | * in the parent, then we will also recieve events from the child. | |
1592 | * | |
1593 | * Returns non-zero for success, zero for failure. | |
1594 | */ | |
c906108c | 1595 | |
c3f6f71d | 1596 | int |
fba45db2 | 1597 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1598 | { |
1599 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1600 | } | |
c5aa993b | 1601 | |
c3f6f71d JM |
1602 | /* |
1603 | * Function: proc_unset_inherit_on_fork | |
1604 | * | |
1605 | * Reset inherit_on_fork flag. | |
1606 | * If the process forks a child while we are registered for events | |
1607 | * in the parent, then we will NOT recieve events from the child. | |
1608 | * | |
1609 | * Returns non-zero for success, zero for failure. | |
1610 | */ | |
c906108c | 1611 | |
c3f6f71d | 1612 | int |
fba45db2 | 1613 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1614 | { |
1615 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1616 | } | |
c906108c | 1617 | |
c3f6f71d JM |
1618 | #ifdef PR_ASYNC |
1619 | /* | |
1620 | * Function: proc_set_async | |
1621 | * | |
1622 | * Set PR_ASYNC flag. | |
19958708 | 1623 | * If one LWP stops because of a debug event (signal etc.), |
c3f6f71d JM |
1624 | * the remaining LWPs will continue to run. |
1625 | * | |
1626 | * Returns non-zero for success, zero for failure. | |
1627 | */ | |
c906108c | 1628 | |
c3f6f71d | 1629 | int |
fba45db2 | 1630 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1631 | { |
1632 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1633 | } | |
c906108c | 1634 | |
c3f6f71d JM |
1635 | /* |
1636 | * Function: proc_unset_async | |
1637 | * | |
1638 | * Reset PR_ASYNC flag. | |
1639 | * If one LWP stops because of a debug event (signal etc.), | |
1640 | * then all other LWPs will stop as well. | |
1641 | * | |
1642 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1643 | */ |
1644 | ||
c3f6f71d | 1645 | int |
fba45db2 | 1646 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1647 | { |
1648 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1649 | } | |
1650 | #endif /* PR_ASYNC */ | |
c906108c SS |
1651 | |
1652 | /* | |
c3f6f71d JM |
1653 | * Function: proc_stop_process |
1654 | * | |
1655 | * Request the process/LWP to stop. Does not wait. | |
19958708 | 1656 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1657 | */ |
c906108c | 1658 | |
c3f6f71d | 1659 | int |
fba45db2 | 1660 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1661 | { |
1662 | int win; | |
c906108c | 1663 | |
c3f6f71d JM |
1664 | /* |
1665 | * We might conceivably apply this operation to an LWP, and | |
1666 | * the LWP's ctl file descriptor might not be open. | |
1667 | */ | |
c906108c | 1668 | |
c3f6f71d JM |
1669 | if (pi->ctl_fd == 0 && |
1670 | open_procinfo_files (pi, FD_CTL) == 0) | |
1671 | return 0; | |
1672 | else | |
1673 | { | |
1674 | #ifdef NEW_PROC_API | |
37de36c6 | 1675 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1676 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1677 | #else /* ioctl method */ | |
1678 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1679 | /* Note: the call also reads the prstatus. */ | |
1680 | if (win) | |
1681 | { | |
1682 | pi->status_valid = 1; | |
19958708 | 1683 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1684 | proc_why (pi), |
19958708 | 1685 | proc_what (pi), |
c3f6f71d JM |
1686 | proc_get_current_thread (pi)); |
1687 | } | |
1688 | #endif | |
1689 | } | |
c906108c | 1690 | |
c3f6f71d JM |
1691 | return win; |
1692 | } | |
c5aa993b | 1693 | |
c3f6f71d JM |
1694 | /* |
1695 | * Function: proc_wait_for_stop | |
1696 | * | |
1697 | * Wait for the process or LWP to stop (block until it does). | |
19958708 | 1698 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1699 | */ |
1700 | ||
c3f6f71d | 1701 | int |
fba45db2 | 1702 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1703 | { |
c3f6f71d JM |
1704 | int win; |
1705 | ||
1706 | /* | |
1707 | * We should never have to apply this operation to any procinfo | |
1708 | * except the one for the main process. If that ever changes | |
19958708 | 1709 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1710 | * replace it with one that makes sure the ctl_fd is open. |
1711 | */ | |
19958708 | 1712 | |
c3f6f71d JM |
1713 | if (pi->tid != 0) |
1714 | pi = find_procinfo_or_die (pi->pid, 0); | |
1715 | ||
1716 | #ifdef NEW_PROC_API | |
1717 | { | |
37de36c6 | 1718 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1719 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1720 | /* We been runnin' and we stopped -- need to update status. */ | |
1721 | pi->status_valid = 0; | |
1722 | } | |
1723 | #else /* ioctl method */ | |
1724 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1725 | /* Above call also refreshes the prstatus. */ | |
1726 | if (win) | |
1727 | { | |
1728 | pi->status_valid = 1; | |
19958708 | 1729 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1730 | proc_why (pi), |
19958708 | 1731 | proc_what (pi), |
c3f6f71d JM |
1732 | proc_get_current_thread (pi)); |
1733 | } | |
c906108c SS |
1734 | #endif |
1735 | ||
c3f6f71d | 1736 | return win; |
c906108c SS |
1737 | } |
1738 | ||
1739 | /* | |
c3f6f71d JM |
1740 | * Function: proc_run_process |
1741 | * | |
1742 | * Make the process or LWP runnable. | |
1743 | * Options (not all are implemented): | |
1744 | * - single-step | |
1745 | * - clear current fault | |
1746 | * - clear current signal | |
1747 | * - abort the current system call | |
1748 | * - stop as soon as finished with system call | |
1749 | * - (ioctl): set traced signal set | |
1750 | * - (ioctl): set held signal set | |
1751 | * - (ioctl): set traced fault set | |
1752 | * - (ioctl): set start pc (vaddr) | |
1753 | * Always clear the current fault. | |
1754 | * Clear the current signal if 'signo' is zero. | |
1755 | * | |
1756 | * Arguments: | |
1757 | * pi the process or LWP to operate on. | |
1758 | * step if true, set the process or LWP to trap after one instr. | |
1759 | * signo if zero, clear the current signal if any. | |
1760 | * if non-zero, set the current signal to this one. | |
1761 | * | |
19958708 | 1762 | * Returns non-zero for success, zero for failure. |
c3f6f71d JM |
1763 | */ |
1764 | ||
1765 | int | |
fba45db2 | 1766 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1767 | { |
1768 | int win; | |
1769 | int runflags; | |
1770 | ||
1771 | /* | |
1772 | * We will probably have to apply this operation to individual threads, | |
1773 | * so make sure the control file descriptor is open. | |
1774 | */ | |
19958708 | 1775 | |
c3f6f71d JM |
1776 | if (pi->ctl_fd == 0 && |
1777 | open_procinfo_files (pi, FD_CTL) == 0) | |
1778 | { | |
1779 | return 0; | |
1780 | } | |
c906108c | 1781 | |
c3f6f71d JM |
1782 | runflags = PRCFAULT; /* always clear current fault */ |
1783 | if (step) | |
1784 | runflags |= PRSTEP; | |
1785 | if (signo == 0) | |
1786 | runflags |= PRCSIG; | |
1787 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1788 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1789 | |
c3f6f71d JM |
1790 | #ifdef NEW_PROC_API |
1791 | { | |
37de36c6 | 1792 | procfs_ctl_t cmd[2]; |
c906108c | 1793 | |
c3f6f71d JM |
1794 | cmd[0] = PCRUN; |
1795 | cmd[1] = runflags; | |
1796 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1797 | } | |
1798 | #else /* ioctl method */ | |
1799 | { | |
1800 | prrun_t prrun; | |
c906108c | 1801 | |
c3f6f71d JM |
1802 | memset (&prrun, 0, sizeof (prrun)); |
1803 | prrun.pr_flags = runflags; | |
1804 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1805 | } | |
1806 | #endif | |
c906108c | 1807 | |
c3f6f71d JM |
1808 | return win; |
1809 | } | |
c906108c | 1810 | |
c3f6f71d JM |
1811 | /* |
1812 | * Function: proc_set_traced_signals | |
1813 | * | |
1814 | * Register to trace signals in the process or LWP. | |
19958708 | 1815 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1816 | */ |
1817 | ||
c3f6f71d | 1818 | int |
37de36c6 | 1819 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1820 | { |
c3f6f71d JM |
1821 | int win; |
1822 | ||
1823 | /* | |
1824 | * We should never have to apply this operation to any procinfo | |
1825 | * except the one for the main process. If that ever changes | |
19958708 | 1826 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1827 | * replace it with one that makes sure the ctl_fd is open. |
1828 | */ | |
19958708 | 1829 | |
c3f6f71d JM |
1830 | if (pi->tid != 0) |
1831 | pi = find_procinfo_or_die (pi->pid, 0); | |
1832 | ||
1833 | #ifdef NEW_PROC_API | |
1834 | { | |
1835 | struct { | |
37de36c6 | 1836 | procfs_ctl_t cmd; |
c3f6f71d | 1837 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1838 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1839 | } arg; |
c906108c | 1840 | |
c3f6f71d | 1841 | arg.cmd = PCSTRACE; |
37de36c6 | 1842 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1843 | |
c3f6f71d JM |
1844 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1845 | } | |
1846 | #else /* ioctl method */ | |
1847 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1848 | #endif | |
1849 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1850 | pi->status_valid = 0; | |
c906108c | 1851 | |
c3f6f71d | 1852 | if (!win) |
8a3fe4f8 | 1853 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1854 | return win; |
c906108c SS |
1855 | } |
1856 | ||
1857 | /* | |
c3f6f71d JM |
1858 | * Function: proc_set_traced_faults |
1859 | * | |
1860 | * Register to trace hardware faults in the process or LWP. | |
19958708 | 1861 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1862 | */ |
c906108c | 1863 | |
c3f6f71d | 1864 | int |
fba45db2 | 1865 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1866 | { |
1867 | int win; | |
1868 | ||
1869 | /* | |
1870 | * We should never have to apply this operation to any procinfo | |
1871 | * except the one for the main process. If that ever changes | |
19958708 | 1872 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1873 | * replace it with one that makes sure the ctl_fd is open. |
1874 | */ | |
19958708 | 1875 | |
c3f6f71d JM |
1876 | if (pi->tid != 0) |
1877 | pi = find_procinfo_or_die (pi->pid, 0); | |
1878 | ||
1879 | #ifdef NEW_PROC_API | |
1880 | { | |
1881 | struct { | |
37de36c6 | 1882 | procfs_ctl_t cmd; |
c3f6f71d JM |
1883 | /* Use char array to avoid alignment issues. */ |
1884 | char fltset[sizeof (fltset_t)]; | |
1885 | } arg; | |
c906108c | 1886 | |
c3f6f71d JM |
1887 | arg.cmd = PCSFAULT; |
1888 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1889 | |
c3f6f71d JM |
1890 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1891 | } | |
1892 | #else /* ioctl method */ | |
1893 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1894 | #endif | |
1895 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1896 | pi->status_valid = 0; | |
c906108c | 1897 | |
c3f6f71d JM |
1898 | return win; |
1899 | } | |
c5aa993b | 1900 | |
c3f6f71d JM |
1901 | /* |
1902 | * Function: proc_set_traced_sysentry | |
1903 | * | |
1904 | * Register to trace entry to system calls in the process or LWP. | |
19958708 | 1905 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1906 | */ |
1907 | ||
c3f6f71d | 1908 | int |
fba45db2 | 1909 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1910 | { |
c3f6f71d JM |
1911 | int win; |
1912 | ||
1913 | /* | |
1914 | * We should never have to apply this operation to any procinfo | |
1915 | * except the one for the main process. If that ever changes | |
19958708 | 1916 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1917 | * replace it with one that makes sure the ctl_fd is open. |
1918 | */ | |
19958708 | 1919 | |
c3f6f71d JM |
1920 | if (pi->tid != 0) |
1921 | pi = find_procinfo_or_die (pi->pid, 0); | |
1922 | ||
1923 | #ifdef NEW_PROC_API | |
1924 | { | |
37de36c6 KB |
1925 | struct gdb_proc_ctl_pcsentry { |
1926 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1927 | /* Use char array to avoid alignment issues. */ |
1928 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1929 | } *argp; |
1930 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1931 | - sizeof (sysset_t) | |
1932 | + sysset_t_size (pi); | |
c3f6f71d | 1933 | |
37de36c6 | 1934 | argp = xmalloc (argp_size); |
c3f6f71d | 1935 | |
37de36c6 KB |
1936 | argp->cmd = PCSENTRY; |
1937 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1938 | ||
1939 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1940 | xfree (argp); | |
c3f6f71d JM |
1941 | } |
1942 | #else /* ioctl method */ | |
1943 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1944 | #endif | |
1945 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1946 | pi->status_valid = 0; | |
19958708 | 1947 | |
c3f6f71d | 1948 | return win; |
c906108c SS |
1949 | } |
1950 | ||
1951 | /* | |
c3f6f71d JM |
1952 | * Function: proc_set_traced_sysexit |
1953 | * | |
1954 | * Register to trace exit from system calls in the process or LWP. | |
19958708 | 1955 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1956 | */ |
c906108c | 1957 | |
c3f6f71d | 1958 | int |
fba45db2 | 1959 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1960 | { |
1961 | int win; | |
1962 | ||
1963 | /* | |
1964 | * We should never have to apply this operation to any procinfo | |
1965 | * except the one for the main process. If that ever changes | |
19958708 | 1966 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1967 | * replace it with one that makes sure the ctl_fd is open. |
1968 | */ | |
19958708 | 1969 | |
c3f6f71d JM |
1970 | if (pi->tid != 0) |
1971 | pi = find_procinfo_or_die (pi->pid, 0); | |
1972 | ||
1973 | #ifdef NEW_PROC_API | |
1974 | { | |
37de36c6 KB |
1975 | struct gdb_proc_ctl_pcsexit { |
1976 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1977 | /* Use char array to avoid alignment issues. */ |
1978 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1979 | } *argp; |
1980 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1981 | - sizeof (sysset_t) | |
1982 | + sysset_t_size (pi); | |
c906108c | 1983 | |
37de36c6 | 1984 | argp = xmalloc (argp_size); |
c906108c | 1985 | |
37de36c6 KB |
1986 | argp->cmd = PCSEXIT; |
1987 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1988 | ||
1989 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1990 | xfree (argp); | |
c3f6f71d JM |
1991 | } |
1992 | #else /* ioctl method */ | |
1993 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1994 | #endif | |
1995 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1996 | pi->status_valid = 0; | |
c906108c | 1997 | |
c3f6f71d JM |
1998 | return win; |
1999 | } | |
c906108c | 2000 | |
c3f6f71d JM |
2001 | /* |
2002 | * Function: proc_set_held_signals | |
2003 | * | |
2004 | * Specify the set of blocked / held signals in the process or LWP. | |
19958708 | 2005 | * Returns non-zero for success, zero for failure. |
c906108c SS |
2006 | */ |
2007 | ||
c3f6f71d | 2008 | int |
37de36c6 | 2009 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 2010 | { |
c3f6f71d JM |
2011 | int win; |
2012 | ||
2013 | /* | |
2014 | * We should never have to apply this operation to any procinfo | |
2015 | * except the one for the main process. If that ever changes | |
19958708 | 2016 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2017 | * replace it with one that makes sure the ctl_fd is open. |
2018 | */ | |
19958708 | 2019 | |
c3f6f71d JM |
2020 | if (pi->tid != 0) |
2021 | pi = find_procinfo_or_die (pi->pid, 0); | |
2022 | ||
2023 | #ifdef NEW_PROC_API | |
2024 | { | |
2025 | struct { | |
37de36c6 | 2026 | procfs_ctl_t cmd; |
c3f6f71d | 2027 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2028 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
2029 | } arg; |
2030 | ||
2031 | arg.cmd = PCSHOLD; | |
37de36c6 | 2032 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2033 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
2034 | } | |
c906108c | 2035 | #else |
c3f6f71d | 2036 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 2037 | #endif |
c3f6f71d JM |
2038 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
2039 | pi->status_valid = 0; | |
2040 | ||
2041 | return win; | |
c906108c SS |
2042 | } |
2043 | ||
2044 | /* | |
c3f6f71d JM |
2045 | * Function: proc_get_pending_signals |
2046 | * | |
2047 | * returns the set of signals that are pending in the process or LWP. | |
2048 | * Will also copy the sigset if 'save' is non-zero. | |
2049 | */ | |
c906108c | 2050 | |
37de36c6 KB |
2051 | gdb_sigset_t * |
2052 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2053 | { |
37de36c6 | 2054 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2055 | |
2056 | /* | |
2057 | * We should never have to apply this operation to any procinfo | |
2058 | * except the one for the main process. If that ever changes | |
19958708 | 2059 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2060 | * replace it with one that makes sure the ctl_fd is open. |
2061 | */ | |
19958708 | 2062 | |
c3f6f71d JM |
2063 | if (pi->tid != 0) |
2064 | pi = find_procinfo_or_die (pi->pid, 0); | |
2065 | ||
2066 | if (!pi->status_valid) | |
2067 | if (!proc_get_status (pi)) | |
2068 | return NULL; | |
2069 | ||
2070 | #ifdef NEW_PROC_API | |
2071 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2072 | #else | |
2073 | ret = &pi->prstatus.pr_sigpend; | |
2074 | #endif | |
2075 | if (save && ret) | |
37de36c6 | 2076 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2077 | |
c3f6f71d JM |
2078 | return ret; |
2079 | } | |
c906108c | 2080 | |
c3f6f71d JM |
2081 | /* |
2082 | * Function: proc_get_signal_actions | |
2083 | * | |
2084 | * returns the set of signal actions. | |
2085 | * Will also copy the sigactionset if 'save' is non-zero. | |
2086 | */ | |
c906108c | 2087 | |
37de36c6 KB |
2088 | gdb_sigaction_t * |
2089 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2090 | { |
37de36c6 | 2091 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2092 | |
2093 | /* | |
2094 | * We should never have to apply this operation to any procinfo | |
2095 | * except the one for the main process. If that ever changes | |
19958708 | 2096 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2097 | * replace it with one that makes sure the ctl_fd is open. |
2098 | */ | |
19958708 | 2099 | |
c3f6f71d JM |
2100 | if (pi->tid != 0) |
2101 | pi = find_procinfo_or_die (pi->pid, 0); | |
2102 | ||
2103 | if (!pi->status_valid) | |
2104 | if (!proc_get_status (pi)) | |
2105 | return NULL; | |
2106 | ||
2107 | #ifdef NEW_PROC_API | |
2108 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2109 | #else | |
2110 | ret = &pi->prstatus.pr_action; | |
2111 | #endif | |
2112 | if (save && ret) | |
37de36c6 | 2113 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2114 | |
c3f6f71d JM |
2115 | return ret; |
2116 | } | |
c5aa993b | 2117 | |
c3f6f71d JM |
2118 | /* |
2119 | * Function: proc_get_held_signals | |
2120 | * | |
2121 | * returns the set of signals that are held / blocked. | |
2122 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2123 | */ |
2124 | ||
37de36c6 KB |
2125 | gdb_sigset_t * |
2126 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2127 | { |
37de36c6 | 2128 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2129 | |
2130 | /* | |
2131 | * We should never have to apply this operation to any procinfo | |
2132 | * except the one for the main process. If that ever changes | |
19958708 | 2133 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2134 | * replace it with one that makes sure the ctl_fd is open. |
2135 | */ | |
19958708 | 2136 | |
c3f6f71d JM |
2137 | if (pi->tid != 0) |
2138 | pi = find_procinfo_or_die (pi->pid, 0); | |
2139 | ||
2140 | #ifdef NEW_PROC_API | |
2141 | if (!pi->status_valid) | |
2142 | if (!proc_get_status (pi)) | |
2143 | return NULL; | |
2144 | ||
2145 | #ifdef UNIXWARE | |
2146 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2147 | #else |
c3f6f71d JM |
2148 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2149 | #endif /* UNIXWARE */ | |
2150 | #else /* not NEW_PROC_API */ | |
2151 | { | |
37de36c6 | 2152 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2153 | |
2154 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2155 | ret = &sigheld; | |
2156 | } | |
2157 | #endif /* NEW_PROC_API */ | |
2158 | if (save && ret) | |
37de36c6 | 2159 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2160 | |
2161 | return ret; | |
c906108c SS |
2162 | } |
2163 | ||
c3f6f71d JM |
2164 | /* |
2165 | * Function: proc_get_traced_signals | |
2166 | * | |
2167 | * returns the set of signals that are traced / debugged. | |
2168 | * Will also copy the sigset if 'save' is non-zero. | |
2169 | */ | |
2170 | ||
37de36c6 KB |
2171 | gdb_sigset_t * |
2172 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2173 | { |
37de36c6 | 2174 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2175 | |
2176 | /* | |
2177 | * We should never have to apply this operation to any procinfo | |
2178 | * except the one for the main process. If that ever changes | |
19958708 | 2179 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2180 | * replace it with one that makes sure the ctl_fd is open. |
2181 | */ | |
19958708 | 2182 | |
c3f6f71d JM |
2183 | if (pi->tid != 0) |
2184 | pi = find_procinfo_or_die (pi->pid, 0); | |
2185 | ||
2186 | #ifdef NEW_PROC_API | |
2187 | if (!pi->status_valid) | |
2188 | if (!proc_get_status (pi)) | |
2189 | return NULL; | |
2190 | ||
2191 | ret = &pi->prstatus.pr_sigtrace; | |
2192 | #else | |
2193 | { | |
37de36c6 | 2194 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2195 | |
2196 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2197 | ret = &sigtrace; | |
2198 | } | |
c906108c | 2199 | #endif |
c3f6f71d | 2200 | if (save && ret) |
37de36c6 | 2201 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2202 | |
c3f6f71d JM |
2203 | return ret; |
2204 | } | |
c906108c | 2205 | |
c3f6f71d JM |
2206 | /* |
2207 | * Function: proc_trace_signal | |
2208 | * | |
2209 | * Add 'signo' to the set of signals that are traced. | |
2210 | * Returns non-zero for success, zero for failure. | |
2211 | */ | |
c906108c | 2212 | |
c3f6f71d | 2213 | int |
fba45db2 | 2214 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2215 | { |
37de36c6 | 2216 | gdb_sigset_t temp; |
c3f6f71d JM |
2217 | |
2218 | /* | |
2219 | * We should never have to apply this operation to any procinfo | |
2220 | * except the one for the main process. If that ever changes | |
19958708 | 2221 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2222 | * replace it with one that makes sure the ctl_fd is open. |
2223 | */ | |
19958708 | 2224 | |
c3f6f71d JM |
2225 | if (pi->tid != 0) |
2226 | pi = find_procinfo_or_die (pi->pid, 0); | |
2227 | ||
2228 | if (pi) | |
c906108c | 2229 | { |
c3f6f71d | 2230 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2231 | { |
3c95f01c | 2232 | gdb_praddset (&temp, signo); |
c3f6f71d | 2233 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2234 | } |
2235 | } | |
c5aa993b | 2236 | |
c3f6f71d JM |
2237 | return 0; /* failure */ |
2238 | } | |
c906108c | 2239 | |
c3f6f71d JM |
2240 | /* |
2241 | * Function: proc_ignore_signal | |
2242 | * | |
2243 | * Remove 'signo' from the set of signals that are traced. | |
2244 | * Returns non-zero for success, zero for failure. | |
2245 | */ | |
c906108c | 2246 | |
c3f6f71d | 2247 | int |
fba45db2 | 2248 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2249 | { |
37de36c6 | 2250 | gdb_sigset_t temp; |
c3f6f71d JM |
2251 | |
2252 | /* | |
2253 | * We should never have to apply this operation to any procinfo | |
2254 | * except the one for the main process. If that ever changes | |
19958708 | 2255 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2256 | * replace it with one that makes sure the ctl_fd is open. |
2257 | */ | |
19958708 | 2258 | |
c3f6f71d JM |
2259 | if (pi->tid != 0) |
2260 | pi = find_procinfo_or_die (pi->pid, 0); | |
2261 | ||
2262 | if (pi) | |
c906108c | 2263 | { |
c3f6f71d | 2264 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2265 | { |
3c95f01c | 2266 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2267 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2268 | } |
c906108c | 2269 | } |
c906108c | 2270 | |
c3f6f71d | 2271 | return 0; /* failure */ |
c906108c SS |
2272 | } |
2273 | ||
2274 | /* | |
c3f6f71d JM |
2275 | * Function: proc_get_traced_faults |
2276 | * | |
2277 | * returns the set of hardware faults that are traced /debugged. | |
2278 | * Will also copy the faultset if 'save' is non-zero. | |
2279 | */ | |
2280 | ||
2281 | fltset_t * | |
fba45db2 | 2282 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2283 | { |
2284 | fltset_t *ret = NULL; | |
2285 | ||
2286 | /* | |
2287 | * We should never have to apply this operation to any procinfo | |
2288 | * except the one for the main process. If that ever changes | |
19958708 | 2289 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2290 | * replace it with one that makes sure the ctl_fd is open. |
2291 | */ | |
19958708 | 2292 | |
c3f6f71d JM |
2293 | if (pi->tid != 0) |
2294 | pi = find_procinfo_or_die (pi->pid, 0); | |
2295 | ||
2296 | #ifdef NEW_PROC_API | |
2297 | if (!pi->status_valid) | |
2298 | if (!proc_get_status (pi)) | |
2299 | return NULL; | |
2300 | ||
2301 | ret = &pi->prstatus.pr_flttrace; | |
2302 | #else | |
2303 | { | |
2304 | static fltset_t flttrace; | |
2305 | ||
2306 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2307 | ret = &flttrace; | |
2308 | } | |
2309 | #endif | |
2310 | if (save && ret) | |
2311 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2312 | |
c3f6f71d JM |
2313 | return ret; |
2314 | } | |
c906108c | 2315 | |
c3f6f71d JM |
2316 | /* |
2317 | * Function: proc_get_traced_sysentry | |
2318 | * | |
2319 | * returns the set of syscalls that are traced /debugged on entry. | |
2320 | * Will also copy the syscall set if 'save' is non-zero. | |
2321 | */ | |
c906108c | 2322 | |
c3f6f71d | 2323 | sysset_t * |
fba45db2 | 2324 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2325 | { |
2326 | sysset_t *ret = NULL; | |
2327 | ||
2328 | /* | |
2329 | * We should never have to apply this operation to any procinfo | |
2330 | * except the one for the main process. If that ever changes | |
19958708 | 2331 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2332 | * replace it with one that makes sure the ctl_fd is open. |
2333 | */ | |
19958708 | 2334 | |
c3f6f71d JM |
2335 | if (pi->tid != 0) |
2336 | pi = find_procinfo_or_die (pi->pid, 0); | |
2337 | ||
2338 | #ifdef NEW_PROC_API | |
2339 | if (!pi->status_valid) | |
2340 | if (!proc_get_status (pi)) | |
2341 | return NULL; | |
2342 | ||
37de36c6 | 2343 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2344 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2345 | #else /* DYNAMIC_SYSCALLS */ |
2346 | { | |
2347 | static sysset_t *sysentry; | |
2348 | size_t size; | |
2349 | ||
2350 | if (!sysentry) | |
2351 | sysentry = sysset_t_alloc (pi); | |
2352 | ret = sysentry; | |
2353 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2354 | return NULL; | |
2355 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2356 | { | |
2357 | gdb_premptysysset (sysentry); | |
2358 | } | |
2359 | else | |
2360 | { | |
2361 | int rsize; | |
2362 | ||
2363 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2364 | SEEK_SET) | |
2365 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2366 | return NULL; | |
2367 | size = sysset_t_size (pi); | |
2368 | gdb_premptysysset (sysentry); | |
2369 | rsize = read (pi->status_fd, sysentry, size); | |
2370 | if (rsize < 0) | |
2371 | return NULL; | |
2372 | } | |
2373 | } | |
2374 | #endif /* DYNAMIC_SYSCALLS */ | |
2375 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2376 | { |
2377 | static sysset_t sysentry; | |
c906108c | 2378 | |
c3f6f71d JM |
2379 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2380 | ret = &sysentry; | |
2381 | } | |
37de36c6 | 2382 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2383 | if (save && ret) |
37de36c6 | 2384 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2385 | |
c3f6f71d JM |
2386 | return ret; |
2387 | } | |
c5aa993b | 2388 | |
c3f6f71d JM |
2389 | /* |
2390 | * Function: proc_get_traced_sysexit | |
2391 | * | |
2392 | * returns the set of syscalls that are traced /debugged on exit. | |
2393 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2394 | */ |
2395 | ||
c3f6f71d | 2396 | sysset_t * |
fba45db2 | 2397 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2398 | { |
c3f6f71d JM |
2399 | sysset_t * ret = NULL; |
2400 | ||
2401 | /* | |
2402 | * We should never have to apply this operation to any procinfo | |
2403 | * except the one for the main process. If that ever changes | |
19958708 | 2404 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2405 | * replace it with one that makes sure the ctl_fd is open. |
2406 | */ | |
19958708 | 2407 | |
c3f6f71d JM |
2408 | if (pi->tid != 0) |
2409 | pi = find_procinfo_or_die (pi->pid, 0); | |
2410 | ||
2411 | #ifdef NEW_PROC_API | |
2412 | if (!pi->status_valid) | |
2413 | if (!proc_get_status (pi)) | |
2414 | return NULL; | |
2415 | ||
37de36c6 | 2416 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2417 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2418 | #else /* DYNAMIC_SYSCALLS */ |
2419 | { | |
2420 | static sysset_t *sysexit; | |
2421 | size_t size; | |
2422 | ||
2423 | if (!sysexit) | |
2424 | sysexit = sysset_t_alloc (pi); | |
2425 | ret = sysexit; | |
2426 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2427 | return NULL; | |
2428 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2429 | { | |
2430 | gdb_premptysysset (sysexit); | |
2431 | } | |
2432 | else | |
2433 | { | |
2434 | int rsize; | |
2435 | ||
2436 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2437 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2438 | return NULL; | |
2439 | size = sysset_t_size (pi); | |
2440 | gdb_premptysysset (sysexit); | |
2441 | rsize = read (pi->status_fd, sysexit, size); | |
2442 | if (rsize < 0) | |
2443 | return NULL; | |
2444 | } | |
2445 | } | |
2446 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2447 | #else |
2448 | { | |
2449 | static sysset_t sysexit; | |
c5aa993b | 2450 | |
c3f6f71d JM |
2451 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2452 | ret = &sysexit; | |
2453 | } | |
2454 | #endif | |
2455 | if (save && ret) | |
37de36c6 | 2456 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2457 | |
2458 | return ret; | |
2459 | } | |
c906108c | 2460 | |
c3f6f71d JM |
2461 | /* |
2462 | * Function: proc_clear_current_fault | |
2463 | * | |
2464 | * The current fault (if any) is cleared; the associated signal | |
2465 | * will not be sent to the process or LWP when it resumes. | |
2466 | * Returns non-zero for success, zero for failure. | |
2467 | */ | |
c906108c | 2468 | |
c3f6f71d | 2469 | int |
fba45db2 | 2470 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2471 | { |
2472 | int win; | |
2473 | ||
2474 | /* | |
2475 | * We should never have to apply this operation to any procinfo | |
2476 | * except the one for the main process. If that ever changes | |
19958708 | 2477 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2478 | * replace it with one that makes sure the ctl_fd is open. |
2479 | */ | |
19958708 | 2480 | |
c3f6f71d JM |
2481 | if (pi->tid != 0) |
2482 | pi = find_procinfo_or_die (pi->pid, 0); | |
2483 | ||
2484 | #ifdef NEW_PROC_API | |
2485 | { | |
37de36c6 | 2486 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2487 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2488 | } | |
2489 | #else | |
2490 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2491 | #endif | |
2492 | ||
2493 | return win; | |
c906108c SS |
2494 | } |
2495 | ||
2496 | /* | |
c3f6f71d JM |
2497 | * Function: proc_set_current_signal |
2498 | * | |
2499 | * Set the "current signal" that will be delivered next to the process. | |
2500 | * NOTE: semantics are different from those of KILL. | |
2501 | * This signal will be delivered to the process or LWP | |
2502 | * immediately when it is resumed (even if the signal is held/blocked); | |
2503 | * it will NOT immediately cause another event of interest, and will NOT | |
2504 | * first trap back to the debugger. | |
2505 | * | |
2506 | * Returns non-zero for success, zero for failure. | |
2507 | */ | |
2508 | ||
2509 | int | |
fba45db2 | 2510 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2511 | { |
2512 | int win; | |
2513 | struct { | |
37de36c6 | 2514 | procfs_ctl_t cmd; |
c3f6f71d | 2515 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2516 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2517 | } arg; |
73930d4d | 2518 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2519 | ptid_t wait_ptid; |
2520 | struct target_waitstatus wait_status; | |
c3f6f71d JM |
2521 | |
2522 | /* | |
2523 | * We should never have to apply this operation to any procinfo | |
2524 | * except the one for the main process. If that ever changes | |
19958708 | 2525 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2526 | * replace it with one that makes sure the ctl_fd is open. |
2527 | */ | |
19958708 | 2528 | |
c3f6f71d JM |
2529 | if (pi->tid != 0) |
2530 | pi = find_procinfo_or_die (pi->pid, 0); | |
2531 | ||
2532 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2533 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2534 | * receives a PIOCSSIG with a signal identical to the current signal, | |
19958708 | 2535 | * it messes up the current signal. Work around the kernel bug. |
c3f6f71d JM |
2536 | */ |
2537 | if (signo > 0 && | |
2538 | signo == proc_cursig (pi)) | |
2539 | return 1; /* I assume this is a success? */ | |
2540 | #endif | |
2541 | ||
2542 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2543 | get_last_target_status (&wait_ptid, &wait_status); |
2544 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2545 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2546 | && wait_status.value.sig == target_signal_from_host (signo) | |
2547 | && proc_get_status (pi) | |
2548 | #ifdef NEW_PROC_API | |
2549 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2550 | #else | |
2551 | && pi->prstatus.pr_info.si_signo == signo | |
2552 | #endif | |
2553 | ) | |
2554 | /* Use the siginfo associated with the signal being | |
2555 | redelivered. */ | |
2556 | #ifdef NEW_PROC_API | |
73930d4d | 2557 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2558 | #else |
73930d4d | 2559 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2560 | #endif |
2561 | else | |
2562 | { | |
73930d4d KH |
2563 | mysinfo.si_signo = signo; |
2564 | mysinfo.si_code = 0; | |
2565 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2566 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2567 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2568 | } |
c3f6f71d JM |
2569 | |
2570 | #ifdef NEW_PROC_API | |
2571 | arg.cmd = PCSSIG; | |
2572 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2573 | #else | |
2574 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2575 | #endif | |
c906108c | 2576 | |
c3f6f71d JM |
2577 | return win; |
2578 | } | |
c906108c | 2579 | |
c3f6f71d JM |
2580 | /* |
2581 | * Function: proc_clear_current_signal | |
2582 | * | |
2583 | * The current signal (if any) is cleared, and | |
2584 | * is not sent to the process or LWP when it resumes. | |
2585 | * Returns non-zero for success, zero for failure. | |
2586 | */ | |
c906108c | 2587 | |
c3f6f71d | 2588 | int |
fba45db2 | 2589 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2590 | { |
2591 | int win; | |
2592 | ||
2593 | /* | |
2594 | * We should never have to apply this operation to any procinfo | |
2595 | * except the one for the main process. If that ever changes | |
19958708 | 2596 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2597 | * replace it with one that makes sure the ctl_fd is open. |
2598 | */ | |
19958708 | 2599 | |
c3f6f71d JM |
2600 | if (pi->tid != 0) |
2601 | pi = find_procinfo_or_die (pi->pid, 0); | |
2602 | ||
2603 | #ifdef NEW_PROC_API | |
2604 | { | |
2605 | struct { | |
37de36c6 | 2606 | procfs_ctl_t cmd; |
c3f6f71d | 2607 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2608 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2609 | } arg; |
73930d4d | 2610 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2611 | |
2612 | arg.cmd = PCSSIG; | |
2613 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2614 | mysinfo.si_signo = 0; |
2615 | mysinfo.si_code = 0; | |
2616 | mysinfo.si_errno = 0; | |
2617 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2618 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2619 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2620 | |
2621 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2622 | } | |
2623 | #else | |
2624 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2625 | #endif | |
c906108c | 2626 | |
c3f6f71d JM |
2627 | return win; |
2628 | } | |
c906108c | 2629 | |
772cf8be MK |
2630 | /* Return the general-purpose registers for the process or LWP |
2631 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2632 | |
c3f6f71d | 2633 | gdb_gregset_t * |
fba45db2 | 2634 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2635 | { |
2636 | if (!pi->status_valid || !pi->gregs_valid) | |
2637 | if (!proc_get_status (pi)) | |
2638 | return NULL; | |
2639 | ||
772cf8be MK |
2640 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2641 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2642 | |
2643 | #ifdef NEW_PROC_API | |
772cf8be | 2644 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2645 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2646 | # else |
c3f6f71d | 2647 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2648 | # endif |
2649 | #else | |
c3f6f71d | 2650 | return &pi->prstatus.pr_reg; |
772cf8be | 2651 | #endif |
c3f6f71d | 2652 | } |
c5aa993b | 2653 | |
772cf8be MK |
2654 | /* Return the general-purpose registers for the process or LWP |
2655 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2656 | |
c3f6f71d | 2657 | gdb_fpregset_t * |
fba45db2 | 2658 | proc_get_fpregs (procinfo *pi) |
c906108c | 2659 | { |
c3f6f71d JM |
2660 | #ifdef NEW_PROC_API |
2661 | if (!pi->status_valid || !pi->fpregs_valid) | |
2662 | if (!proc_get_status (pi)) | |
2663 | return NULL; | |
2664 | ||
772cf8be | 2665 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2666 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2667 | # else |
c3f6f71d | 2668 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2669 | # endif |
c5aa993b | 2670 | |
772cf8be | 2671 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2672 | if (pi->fpregs_valid) |
772cf8be | 2673 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2674 | else |
c906108c | 2675 | { |
772cf8be | 2676 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2677 | { |
c3f6f71d | 2678 | return NULL; |
c906108c | 2679 | } |
c3f6f71d | 2680 | else |
c906108c | 2681 | { |
772cf8be | 2682 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2683 | struct { |
2684 | long pr_count; | |
2685 | tid_t pr_error_thread; | |
2686 | tfpregset_t thread_1; | |
2687 | } thread_fpregs; | |
2688 | ||
2689 | thread_fpregs.pr_count = 1; | |
2690 | thread_fpregs.thread_1.tid = pi->tid; | |
2691 | ||
772cf8be MK |
2692 | if (pi->tid == 0 |
2693 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2694 | { |
2695 | pi->fpregs_valid = 1; | |
772cf8be | 2696 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2697 | } |
772cf8be MK |
2698 | else if (pi->tid != 0 |
2699 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2700 | { |
2701 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2702 | sizeof (pi->fpregset)); | |
2703 | pi->fpregs_valid = 1; | |
772cf8be | 2704 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2705 | } |
2706 | else | |
2707 | { | |
2708 | return NULL; | |
2709 | } | |
772cf8be | 2710 | # else |
c3f6f71d JM |
2711 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2712 | { | |
2713 | pi->fpregs_valid = 1; | |
772cf8be | 2714 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2715 | } |
2716 | else | |
2717 | { | |
2718 | return NULL; | |
2719 | } | |
772cf8be | 2720 | # endif |
c906108c | 2721 | } |
c906108c | 2722 | } |
772cf8be | 2723 | #endif /* NEW_PROC_API */ |
c906108c SS |
2724 | } |
2725 | ||
772cf8be MK |
2726 | /* Write the general-purpose registers back to the process or LWP |
2727 | corresponding to PI. Return non-zero for success, zero for | |
2728 | failure. */ | |
c3f6f71d JM |
2729 | |
2730 | int | |
fba45db2 | 2731 | proc_set_gregs (procinfo *pi) |
c906108c | 2732 | { |
c3f6f71d JM |
2733 | gdb_gregset_t *gregs; |
2734 | int win; | |
c5aa993b | 2735 | |
772cf8be MK |
2736 | gregs = proc_get_gregs (pi); |
2737 | if (gregs == NULL) | |
2738 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2739 | |
772cf8be | 2740 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2741 | { |
c3f6f71d | 2742 | return 0; |
c906108c | 2743 | } |
c3f6f71d | 2744 | else |
c906108c | 2745 | { |
c3f6f71d JM |
2746 | #ifdef NEW_PROC_API |
2747 | struct { | |
37de36c6 | 2748 | procfs_ctl_t cmd; |
c3f6f71d JM |
2749 | /* Use char array to avoid alignment issues. */ |
2750 | char gregs[sizeof (gdb_gregset_t)]; | |
2751 | } arg; | |
2752 | ||
772cf8be | 2753 | arg.cmd = PCSREG; |
c3f6f71d JM |
2754 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2755 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2756 | #else | |
2757 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2758 | #endif | |
c906108c | 2759 | } |
c3f6f71d | 2760 | |
772cf8be | 2761 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2762 | pi->gregs_valid = 0; |
2763 | return win; | |
c906108c SS |
2764 | } |
2765 | ||
772cf8be MK |
2766 | /* Write the floating-pointer registers back to the process or LWP |
2767 | corresponding to PI. Return non-zero for success, zero for | |
2768 | failure. */ | |
c3f6f71d JM |
2769 | |
2770 | int | |
fba45db2 | 2771 | proc_set_fpregs (procinfo *pi) |
c906108c | 2772 | { |
c3f6f71d JM |
2773 | gdb_fpregset_t *fpregs; |
2774 | int win; | |
2775 | ||
772cf8be MK |
2776 | fpregs = proc_get_fpregs (pi); |
2777 | if (fpregs == NULL) | |
2778 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2779 | |
772cf8be | 2780 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2781 | { |
c3f6f71d | 2782 | return 0; |
c906108c | 2783 | } |
c3f6f71d | 2784 | else |
c906108c | 2785 | { |
c3f6f71d JM |
2786 | #ifdef NEW_PROC_API |
2787 | struct { | |
37de36c6 | 2788 | procfs_ctl_t cmd; |
c3f6f71d JM |
2789 | /* Use char array to avoid alignment issues. */ |
2790 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2791 | } arg; | |
2792 | ||
772cf8be | 2793 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2794 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2795 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2796 | #else | |
772cf8be | 2797 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2798 | if (pi->tid == 0) |
2799 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2800 | else | |
2801 | { | |
2802 | struct { | |
2803 | long pr_count; | |
2804 | tid_t pr_error_thread; | |
2805 | tfpregset_t thread_1; | |
2806 | } thread_fpregs; | |
2807 | ||
2808 | thread_fpregs.pr_count = 1; | |
2809 | thread_fpregs.thread_1.tid = pi->tid; | |
2810 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2811 | sizeof (*fpregs)); | |
2812 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2813 | } | |
772cf8be | 2814 | # else |
c3f6f71d | 2815 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2816 | # endif |
2817 | #endif /* NEW_PROC_API */ | |
c906108c | 2818 | } |
c3f6f71d | 2819 | |
772cf8be | 2820 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2821 | pi->fpregs_valid = 0; |
2822 | return win; | |
c906108c SS |
2823 | } |
2824 | ||
2825 | /* | |
c3f6f71d JM |
2826 | * Function: proc_kill |
2827 | * | |
2828 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2829 | * Returns non-zero for success, zero for failure. | |
2830 | */ | |
c906108c | 2831 | |
c3f6f71d | 2832 | int |
fba45db2 | 2833 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2834 | { |
2835 | int win; | |
c906108c | 2836 | |
c3f6f71d JM |
2837 | /* |
2838 | * We might conceivably apply this operation to an LWP, and | |
2839 | * the LWP's ctl file descriptor might not be open. | |
2840 | */ | |
c906108c | 2841 | |
c3f6f71d JM |
2842 | if (pi->ctl_fd == 0 && |
2843 | open_procinfo_files (pi, FD_CTL) == 0) | |
2844 | { | |
2845 | return 0; | |
2846 | } | |
2847 | else | |
2848 | { | |
2849 | #ifdef NEW_PROC_API | |
37de36c6 | 2850 | procfs_ctl_t cmd[2]; |
c906108c | 2851 | |
c3f6f71d JM |
2852 | cmd[0] = PCKILL; |
2853 | cmd[1] = signo; | |
2854 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2855 | #else /* ioctl method */ | |
2856 | /* FIXME: do I need the Alpha OSF fixups present in | |
2857 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2858 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2859 | #endif | |
2860 | } | |
c906108c | 2861 | |
c3f6f71d JM |
2862 | return win; |
2863 | } | |
c906108c | 2864 | |
c3f6f71d JM |
2865 | /* |
2866 | * Function: proc_parent_pid | |
2867 | * | |
2868 | * Find the pid of the process that started this one. | |
2869 | * Returns the parent process pid, or zero. | |
c906108c SS |
2870 | */ |
2871 | ||
c3f6f71d | 2872 | int |
fba45db2 | 2873 | proc_parent_pid (procinfo *pi) |
c906108c | 2874 | { |
c3f6f71d JM |
2875 | /* |
2876 | * We should never have to apply this operation to any procinfo | |
2877 | * except the one for the main process. If that ever changes | |
19958708 | 2878 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2879 | * replace it with one that makes sure the ctl_fd is open. |
2880 | */ | |
19958708 | 2881 | |
c3f6f71d JM |
2882 | if (pi->tid != 0) |
2883 | pi = find_procinfo_or_die (pi->pid, 0); | |
2884 | ||
2885 | if (!pi->status_valid) | |
2886 | if (!proc_get_status (pi)) | |
2887 | return 0; | |
c5aa993b | 2888 | |
c3f6f71d JM |
2889 | return pi->prstatus.pr_ppid; |
2890 | } | |
2891 | ||
2892 | ||
9a043c1d AC |
2893 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2894 | (a.k.a void pointer)! */ | |
2895 | ||
2896 | static void * | |
2897 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2898 | { | |
4e906f53 | 2899 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2900 | void *ptr; |
2901 | ||
4e906f53 | 2902 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2903 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2904 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2905 | return ptr; |
2906 | } | |
2907 | ||
c3f6f71d JM |
2908 | /* |
2909 | * Function: proc_set_watchpoint | |
2910 | * | |
2911 | */ | |
2912 | ||
2913 | int | |
fba45db2 | 2914 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2915 | { |
d1a7880c PA |
2916 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2917 | /* If neither or these is defined, we can't support watchpoints. | |
2918 | This just avoids possibly failing to compile the below on such | |
2919 | systems. */ | |
c3f6f71d JM |
2920 | return 0; |
2921 | #else | |
2922 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2923 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2924 | return 0; | |
2925 | #else | |
2926 | struct { | |
37de36c6 | 2927 | procfs_ctl_t cmd; |
c3f6f71d JM |
2928 | char watch[sizeof (prwatch_t)]; |
2929 | } arg; | |
73930d4d | 2930 | prwatch_t pwatch; |
c3f6f71d | 2931 | |
9a043c1d AC |
2932 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2933 | convert a target address into something that can be stored in a | |
2934 | native data structure. */ | |
831e682e | 2935 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2936 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2937 | #else |
73930d4d | 2938 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2939 | #endif |
73930d4d KH |
2940 | pwatch.pr_size = len; |
2941 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2942 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2943 | arg.cmd = PCWATCH; | |
73930d4d | 2944 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2945 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2946 | #else | |
2947 | #if defined (PIOCSWATCH) | |
73930d4d | 2948 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2949 | #else |
2950 | return 0; /* Fail */ | |
2951 | #endif | |
2952 | #endif | |
2953 | #endif | |
2954 | #endif | |
c906108c SS |
2955 | } |
2956 | ||
965b60ee | 2957 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2958 | |
c3f6f71d | 2959 | #include <sys/sysi86.h> |
c906108c | 2960 | |
c3f6f71d JM |
2961 | /* |
2962 | * Function: proc_get_LDT_entry | |
2963 | * | |
2964 | * Inputs: | |
2965 | * procinfo *pi; | |
2966 | * int key; | |
2967 | * | |
2968 | * The 'key' is actually the value of the lower 16 bits of | |
2969 | * the GS register for the LWP that we're interested in. | |
2970 | * | |
2971 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2972 | */ |
2973 | ||
c3f6f71d | 2974 | struct ssd * |
fba45db2 | 2975 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2976 | { |
c3f6f71d JM |
2977 | static struct ssd *ldt_entry = NULL; |
2978 | #ifdef NEW_PROC_API | |
2979 | char pathname[MAX_PROC_NAME_SIZE]; | |
2980 | struct cleanup *old_chain = NULL; | |
2981 | int fd; | |
2982 | ||
2983 | /* Allocate space for one LDT entry. | |
2984 | This alloc must persist, because we return a pointer to it. */ | |
2985 | if (ldt_entry == NULL) | |
2986 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2987 | ||
2988 | /* Open the file descriptor for the LDT table. */ | |
2989 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2990 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2991 | { |
c3f6f71d JM |
2992 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2993 | return NULL; | |
c906108c | 2994 | } |
c3f6f71d | 2995 | /* Make sure it gets closed again! */ |
004527cb | 2996 | old_chain = make_cleanup_close (fd); |
c906108c | 2997 | |
c3f6f71d JM |
2998 | /* Now 'read' thru the table, find a match and return it. */ |
2999 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 3000 | { |
c3f6f71d JM |
3001 | if (ldt_entry->sel == 0 && |
3002 | ldt_entry->bo == 0 && | |
3003 | ldt_entry->acc1 == 0 && | |
3004 | ldt_entry->acc2 == 0) | |
3005 | break; /* end of table */ | |
3006 | /* If key matches, return this entry. */ | |
3007 | if (ldt_entry->sel == key) | |
3008 | return ldt_entry; | |
c906108c | 3009 | } |
c3f6f71d JM |
3010 | /* Loop ended, match not found. */ |
3011 | return NULL; | |
3012 | #else | |
3013 | int nldt, i; | |
3014 | static int nalloc = 0; | |
c906108c | 3015 | |
c3f6f71d JM |
3016 | /* Get the number of LDT entries. */ |
3017 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3018 | { |
c3f6f71d JM |
3019 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3020 | return NULL; | |
c906108c SS |
3021 | } |
3022 | ||
c3f6f71d JM |
3023 | /* Allocate space for the number of LDT entries. */ |
3024 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3025 | if (nldt > nalloc) | |
c906108c | 3026 | { |
19958708 | 3027 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
3028 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
3029 | nalloc = nldt; | |
3030 | } | |
19958708 | 3031 | |
c3f6f71d JM |
3032 | /* Read the whole table in one gulp. */ |
3033 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3034 | { | |
3035 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3036 | return NULL; | |
c906108c SS |
3037 | } |
3038 | ||
c3f6f71d JM |
3039 | /* Search the table and return the (first) entry matching 'key'. */ |
3040 | for (i = 0; i < nldt; i++) | |
3041 | if (ldt_entry[i].sel == key) | |
3042 | return &ldt_entry[i]; | |
c906108c | 3043 | |
c3f6f71d JM |
3044 | /* Loop ended, match not found. */ |
3045 | return NULL; | |
3046 | #endif | |
3047 | } | |
c906108c | 3048 | |
965b60ee JB |
3049 | /* |
3050 | * Function: procfs_find_LDT_entry | |
3051 | * | |
3052 | * Input: | |
3053 | * ptid_t ptid; // The GDB-style pid-plus-LWP. | |
3054 | * | |
3055 | * Return: | |
3056 | * pointer to the corresponding LDT entry. | |
3057 | */ | |
3058 | ||
3059 | struct ssd * | |
3060 | procfs_find_LDT_entry (ptid_t ptid) | |
3061 | { | |
3062 | gdb_gregset_t *gregs; | |
3063 | int key; | |
3064 | procinfo *pi; | |
3065 | ||
3066 | /* Find procinfo for the lwp. */ | |
3067 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
3068 | { | |
0b62613e | 3069 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
3070 | PIDGET (ptid), TIDGET (ptid)); |
3071 | return NULL; | |
3072 | } | |
3073 | /* get its general registers. */ | |
3074 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3075 | { | |
0b62613e | 3076 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
3077 | PIDGET (ptid), TIDGET (ptid)); |
3078 | return NULL; | |
3079 | } | |
3080 | /* Now extract the GS register's lower 16 bits. */ | |
3081 | key = (*gregs)[GS] & 0xffff; | |
3082 | ||
3083 | /* Find the matching entry and return it. */ | |
3084 | return proc_get_LDT_entry (pi, key); | |
3085 | } | |
3086 | ||
3087 | #endif | |
c906108c | 3088 | |
c3f6f71d | 3089 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3090 | |
c3f6f71d | 3091 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3092 | |
c3f6f71d JM |
3093 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3094 | since there is a different way to do threads on every OS. */ | |
c906108c | 3095 | |
c3f6f71d | 3096 | /* |
19958708 | 3097 | * Function: proc_get_nthreads |
c3f6f71d | 3098 | * |
19958708 | 3099 | * Return the number of threads for the process |
c3f6f71d | 3100 | */ |
c906108c | 3101 | |
c3f6f71d JM |
3102 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3103 | /* | |
3104 | * OSF version | |
3105 | */ | |
19958708 | 3106 | int |
fba45db2 | 3107 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3108 | { |
3109 | int nthreads = 0; | |
c906108c | 3110 | |
c3f6f71d JM |
3111 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3112 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3113 | |
c3f6f71d | 3114 | return nthreads; |
c906108c SS |
3115 | } |
3116 | ||
c3f6f71d JM |
3117 | #else |
3118 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3119 | /* | |
3120 | * Solaris and Unixware version | |
3121 | */ | |
3122 | int | |
fba45db2 | 3123 | proc_get_nthreads (procinfo *pi) |
c906108c | 3124 | { |
c3f6f71d JM |
3125 | if (!pi->status_valid) |
3126 | if (!proc_get_status (pi)) | |
3127 | return 0; | |
c5aa993b | 3128 | |
c3f6f71d | 3129 | /* |
19958708 | 3130 | * NEW_PROC_API: only works for the process procinfo, |
c3f6f71d JM |
3131 | * because the LWP procinfos do not get prstatus filled in. |
3132 | */ | |
19958708 | 3133 | #ifdef NEW_PROC_API |
c3f6f71d JM |
3134 | if (pi->tid != 0) /* find the parent process procinfo */ |
3135 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3136 | #endif |
c3f6f71d | 3137 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3138 | } |
3139 | ||
c3f6f71d JM |
3140 | #else |
3141 | /* | |
3142 | * Default version | |
3143 | */ | |
3144 | int | |
fba45db2 | 3145 | proc_get_nthreads (procinfo *pi) |
c906108c | 3146 | { |
c3f6f71d JM |
3147 | return 0; |
3148 | } | |
3149 | #endif | |
3150 | #endif | |
3151 | ||
3152 | /* | |
3153 | * Function: proc_get_current_thread (LWP version) | |
3154 | * | |
3155 | * Return the ID of the thread that had an event of interest. | |
3156 | * (ie. the one that hit a breakpoint or other traced event). | |
3157 | * All other things being equal, this should be the ID of a | |
3158 | * thread that is currently executing. | |
3159 | */ | |
3160 | ||
3161 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3162 | /* | |
3163 | * Solaris and Unixware version | |
3164 | */ | |
3165 | int | |
fba45db2 | 3166 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3167 | { |
3168 | /* | |
3169 | * Note: this should be applied to the root procinfo for the process, | |
3170 | * not to the procinfo for an LWP. If applied to the procinfo for | |
19958708 | 3171 | * an LWP, it will simply return that LWP's ID. In that case, |
c3f6f71d JM |
3172 | * find the parent process procinfo. |
3173 | */ | |
19958708 | 3174 | |
c3f6f71d JM |
3175 | if (pi->tid != 0) |
3176 | pi = find_procinfo_or_die (pi->pid, 0); | |
3177 | ||
3178 | if (!pi->status_valid) | |
3179 | if (!proc_get_status (pi)) | |
3180 | return 0; | |
3181 | ||
3182 | #ifdef NEW_PROC_API | |
3183 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3184 | #else |
c3f6f71d | 3185 | return pi->prstatus.pr_who; |
c906108c | 3186 | #endif |
c3f6f71d | 3187 | } |
c906108c | 3188 | |
c3f6f71d JM |
3189 | #else |
3190 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3191 | /* | |
3192 | * OSF version | |
3193 | */ | |
19958708 | 3194 | int |
fba45db2 | 3195 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3196 | { |
3197 | #if 0 /* FIXME: not ready for prime time? */ | |
3198 | return pi->prstatus.pr_tid; | |
3199 | #else | |
3200 | return 0; | |
3201 | #endif | |
c906108c SS |
3202 | } |
3203 | ||
c3f6f71d JM |
3204 | #else |
3205 | /* | |
3206 | * Default version | |
3207 | */ | |
19958708 | 3208 | int |
fba45db2 | 3209 | proc_get_current_thread (procinfo *pi) |
c906108c | 3210 | { |
c3f6f71d JM |
3211 | return 0; |
3212 | } | |
3213 | ||
3214 | #endif | |
3215 | #endif | |
c906108c | 3216 | |
c3f6f71d | 3217 | /* |
19958708 | 3218 | * Function: proc_update_threads |
c3f6f71d JM |
3219 | * |
3220 | * Discover the IDs of all the threads within the process, and | |
3221 | * create a procinfo for each of them (chained to the parent). | |
3222 | * | |
3223 | * This unfortunately requires a different method on every OS. | |
3224 | * | |
3225 | * Return: non-zero for success, zero for failure. | |
3226 | */ | |
c906108c | 3227 | |
c3f6f71d | 3228 | int |
fba45db2 | 3229 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3230 | { |
3231 | if (thread && parent) /* sanity */ | |
c906108c | 3232 | { |
c3f6f71d JM |
3233 | thread->status_valid = 0; |
3234 | if (!proc_get_status (thread)) | |
3235 | destroy_one_procinfo (&parent->thread_list, thread); | |
3236 | } | |
3237 | return 0; /* keep iterating */ | |
3238 | } | |
c5aa993b | 3239 | |
c3f6f71d JM |
3240 | #if defined (PIOCLSTATUS) |
3241 | /* | |
3242 | * Solaris 2.5 (ioctl) version | |
3243 | */ | |
3244 | int | |
fba45db2 | 3245 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3246 | { |
3247 | gdb_prstatus_t *prstatus; | |
3248 | struct cleanup *old_chain = NULL; | |
3249 | procinfo *thread; | |
3250 | int nlwp, i; | |
3251 | ||
3252 | /* | |
3253 | * We should never have to apply this operation to any procinfo | |
3254 | * except the one for the main process. If that ever changes | |
19958708 | 3255 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3256 | * replace it with one that makes sure the ctl_fd is open. |
3257 | */ | |
19958708 | 3258 | |
c3f6f71d JM |
3259 | if (pi->tid != 0) |
3260 | pi = find_procinfo_or_die (pi->pid, 0); | |
3261 | ||
3262 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3263 | ||
3264 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3265 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3266 | ||
3c37485b | 3267 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3268 | |
b8c9b27d | 3269 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3270 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3271 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3272 | ||
3273 | /* Skip element zero, which represents the process as a whole. */ | |
3274 | for (i = 1; i < nlwp + 1; i++) | |
3275 | { | |
3276 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3277 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3278 | |
c3f6f71d JM |
3279 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3280 | thread->status_valid = 1; | |
3281 | } | |
3282 | pi->threads_valid = 1; | |
3283 | do_cleanups (old_chain); | |
3284 | return 1; | |
3285 | } | |
3286 | #else | |
3287 | #ifdef NEW_PROC_API | |
3288 | /* | |
3289 | * Unixware and Solaris 6 (and later) version | |
3290 | */ | |
004527cb AC |
3291 | static void |
3292 | do_closedir_cleanup (void *dir) | |
3293 | { | |
3294 | closedir (dir); | |
3295 | } | |
3296 | ||
c3f6f71d | 3297 | int |
fba45db2 | 3298 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3299 | { |
3300 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3301 | struct dirent *direntry; | |
3302 | struct cleanup *old_chain = NULL; | |
3303 | procinfo *thread; | |
3304 | DIR *dirp; | |
3305 | int lwpid; | |
3306 | ||
3307 | /* | |
3308 | * We should never have to apply this operation to any procinfo | |
3309 | * except the one for the main process. If that ever changes | |
19958708 | 3310 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3311 | * replace it with one that makes sure the ctl_fd is open. |
3312 | */ | |
19958708 | 3313 | |
c3f6f71d JM |
3314 | if (pi->tid != 0) |
3315 | pi = find_procinfo_or_die (pi->pid, 0); | |
3316 | ||
3317 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3318 | ||
3319 | /* | |
3320 | * Unixware | |
3321 | * | |
19958708 RM |
3322 | * Note: this brute-force method is the only way I know of |
3323 | * to accomplish this task on Unixware. This method will | |
c3f6f71d JM |
3324 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
3325 | * and more elegant way to do this on Solaris, but the margins | |
3326 | * of this manuscript are too small to write it here... ;-) | |
3327 | */ | |
3328 | ||
3329 | strcpy (pathname, pi->pathname); | |
3330 | strcat (pathname, "/lwp"); | |
3331 | if ((dirp = opendir (pathname)) == NULL) | |
3332 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3333 | ||
004527cb | 3334 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3335 | while ((direntry = readdir (dirp)) != NULL) |
3336 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3337 | { | |
3338 | lwpid = atoi (&direntry->d_name[0]); | |
3339 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3340 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3341 | } | |
3342 | pi->threads_valid = 1; | |
3343 | do_cleanups (old_chain); | |
3344 | return 1; | |
3345 | } | |
3346 | #else | |
3347 | #ifdef PIOCTLIST | |
3348 | /* | |
3349 | * OSF version | |
3350 | */ | |
19958708 | 3351 | int |
fba45db2 | 3352 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3353 | { |
3354 | int nthreads, i; | |
3355 | tid_t *threads; | |
3356 | ||
3357 | /* | |
3358 | * We should never have to apply this operation to any procinfo | |
3359 | * except the one for the main process. If that ever changes | |
19958708 | 3360 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3361 | * replace it with one that makes sure the ctl_fd is open. |
3362 | */ | |
19958708 | 3363 | |
c3f6f71d JM |
3364 | if (pi->tid != 0) |
3365 | pi = find_procinfo_or_die (pi->pid, 0); | |
3366 | ||
3367 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3368 | ||
3369 | nthreads = proc_get_nthreads (pi); | |
3370 | if (nthreads < 2) | |
3371 | return 0; /* nothing to do for 1 or fewer threads */ | |
3372 | ||
3c37485b | 3373 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3374 | |
c3f6f71d JM |
3375 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3376 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3377 | ||
3378 | for (i = 0; i < nthreads; i++) | |
3379 | { | |
3380 | if (!find_procinfo (pi->pid, threads[i])) | |
3381 | if (!create_procinfo (pi->pid, threads[i])) | |
3382 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3383 | } |
c3f6f71d JM |
3384 | pi->threads_valid = 1; |
3385 | return 1; | |
c906108c | 3386 | } |
c3f6f71d JM |
3387 | #else |
3388 | /* | |
3389 | * Default version | |
3390 | */ | |
3391 | int | |
fba45db2 | 3392 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3393 | { |
3394 | return 0; | |
3395 | } | |
3396 | #endif /* OSF PIOCTLIST */ | |
3397 | #endif /* NEW_PROC_API */ | |
3398 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3399 | |
c3f6f71d JM |
3400 | /* |
3401 | * Function: proc_iterate_over_threads | |
3402 | * | |
3403 | * Description: | |
3404 | * Given a pointer to a function, call that function once | |
3405 | * for each lwp in the procinfo list, until the function | |
3406 | * returns non-zero, in which event return the value | |
3407 | * returned by the function. | |
3408 | * | |
3409 | * Note: this function does NOT call update_threads. | |
3410 | * If you want to discover new threads first, you must | |
3411 | * call that function explicitly. This function just makes | |
19958708 RM |
3412 | * a quick pass over the currently-known procinfos. |
3413 | * | |
c3f6f71d JM |
3414 | * Arguments: |
3415 | * pi - parent process procinfo | |
3416 | * func - per-thread function | |
3417 | * ptr - opaque parameter for function. | |
3418 | * | |
3419 | * Return: | |
3420 | * First non-zero return value from the callee, or zero. | |
3421 | */ | |
3422 | ||
3423 | int | |
d0849a9a KB |
3424 | proc_iterate_over_threads (procinfo *pi, |
3425 | int (*func) (procinfo *, procinfo *, void *), | |
3426 | void *ptr) | |
c906108c | 3427 | { |
c3f6f71d JM |
3428 | procinfo *thread, *next; |
3429 | int retval = 0; | |
c906108c | 3430 | |
c3f6f71d JM |
3431 | /* |
3432 | * We should never have to apply this operation to any procinfo | |
3433 | * except the one for the main process. If that ever changes | |
19958708 | 3434 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3435 | * replace it with one that makes sure the ctl_fd is open. |
3436 | */ | |
19958708 | 3437 | |
c3f6f71d JM |
3438 | if (pi->tid != 0) |
3439 | pi = find_procinfo_or_die (pi->pid, 0); | |
3440 | ||
3441 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3442 | { |
c3f6f71d JM |
3443 | next = thread->next; /* in case thread is destroyed */ |
3444 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3445 | break; | |
c906108c | 3446 | } |
c3f6f71d JM |
3447 | |
3448 | return retval; | |
c906108c SS |
3449 | } |
3450 | ||
c3f6f71d JM |
3451 | /* =================== END, Thread "MODULE" =================== */ |
3452 | ||
3453 | /* =================== END, /proc "MODULE" =================== */ | |
3454 | ||
3455 | /* =================== GDB "MODULE" =================== */ | |
3456 | ||
3457 | /* | |
3458 | * Here are all of the gdb target vector functions and their friends. | |
3459 | */ | |
3460 | ||
39f77062 | 3461 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3462 | static void do_detach (int signo); |
37de36c6 | 3463 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce JB |
3464 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
3465 | int entry_or_exit, int mode, int from_tty); | |
9185ddce JB |
3466 | |
3467 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3468 | the startup phase. The following two variables are used to record | |
3469 | the address of the breakpoint, and the code that was replaced by | |
3470 | a breakpoint. */ | |
3471 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3472 | static void *dbx_link_bpt; |
c3f6f71d JM |
3473 | |
3474 | /* | |
3475 | * Function: procfs_debug_inferior | |
3476 | * | |
3477 | * Sets up the inferior to be debugged. | |
3478 | * Registers to trace signals, hardware faults, and syscalls. | |
3479 | * Note: does not set RLC flag: caller may want to customize that. | |
3480 | * | |
3481 | * Returns: zero for success (note! unlike most functions in this module) | |
3482 | * On failure, returns the LINE NUMBER where it failed! | |
3483 | */ | |
3484 | ||
3485 | static int | |
fba45db2 | 3486 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3487 | { |
c3f6f71d | 3488 | fltset_t traced_faults; |
37de36c6 KB |
3489 | gdb_sigset_t traced_signals; |
3490 | sysset_t *traced_syscall_entries; | |
3491 | sysset_t *traced_syscall_exits; | |
3492 | int status; | |
c906108c | 3493 | |
c3f6f71d JM |
3494 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3495 | /* On some systems (OSF), we don't trace hardware faults. | |
3496 | Apparently it's enough that we catch them as signals. | |
3497 | Wonder why we don't just do that in general? */ | |
3498 | premptyset (&traced_faults); /* don't trace faults. */ | |
3499 | #else | |
3500 | /* Register to trace hardware faults in the child. */ | |
3501 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3502 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3503 | #endif |
3504 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3505 | return __LINE__; | |
c906108c | 3506 | |
c3f6f71d JM |
3507 | /* Register to trace selected signals in the child. */ |
3508 | premptyset (&traced_signals); | |
3509 | if (!register_gdb_signals (pi, &traced_signals)) | |
3510 | return __LINE__; | |
3511 | ||
37de36c6 | 3512 | |
c3f6f71d | 3513 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3514 | traced_syscall_entries = sysset_t_alloc (pi); |
3515 | gdb_premptysysset (traced_syscall_entries); | |
3516 | #ifdef SYS_exit | |
3517 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3518 | #endif | |
c3f6f71d | 3519 | #ifdef SYS_lwpexit |
37de36c6 | 3520 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3521 | #endif |
3522 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3523 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3524 | #endif | |
3525 | #ifdef DYNAMIC_SYSCALLS | |
3526 | { | |
3527 | int callnum = find_syscall (pi, "_exit"); | |
3528 | if (callnum >= 0) | |
3529 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3530 | } | |
c906108c SS |
3531 | #endif |
3532 | ||
37de36c6 KB |
3533 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3534 | xfree (traced_syscall_entries); | |
3535 | if (!status) | |
c3f6f71d JM |
3536 | return __LINE__; |
3537 | ||
3538 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3539 | /* OSF method for tracing exec syscalls. Quoting: | |
3540 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3541 | exits from exec system calls because of the user level loader. */ | |
3542 | /* FIXME: make nice and maybe move into an access function. */ | |
3543 | { | |
3544 | int prfs_flags; | |
3545 | ||
3546 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3547 | return __LINE__; | |
3548 | ||
3549 | prfs_flags |= PRFS_STOPEXEC; | |
3550 | ||
3551 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3552 | return __LINE__; | |
3553 | } | |
3554 | #else /* not PRFS_STOPEXEC */ | |
3555 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3556 | /* GW: Rationale... | |
3557 | Not all systems with /proc have all the exec* syscalls with the same | |
3558 | names. On the SGI, for example, there is no SYS_exec, but there | |
3559 | *is* a SYS_execv. So, we try to account for that. */ | |
3560 | ||
37de36c6 KB |
3561 | traced_syscall_exits = sysset_t_alloc (pi); |
3562 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3563 | #ifdef SYS_exec |
37de36c6 | 3564 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3565 | #endif |
3566 | #ifdef SYS_execve | |
37de36c6 | 3567 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3568 | #endif |
3569 | #ifdef SYS_execv | |
37de36c6 | 3570 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3571 | #endif |
c5aa993b | 3572 | |
c3f6f71d | 3573 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3574 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3575 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3576 | #endif |
c5aa993b | 3577 | |
c3f6f71d | 3578 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3579 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3580 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3581 | #endif |
c5aa993b | 3582 | |
37de36c6 KB |
3583 | #ifdef DYNAMIC_SYSCALLS |
3584 | { | |
3585 | int callnum = find_syscall (pi, "execve"); | |
3586 | if (callnum >= 0) | |
3587 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3588 | callnum = find_syscall (pi, "ra_execve"); | |
3589 | if (callnum >= 0) | |
3590 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3591 | } | |
3592 | #endif | |
c906108c | 3593 | |
37de36c6 KB |
3594 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3595 | xfree (traced_syscall_exits); | |
3596 | if (!status) | |
c3f6f71d JM |
3597 | return __LINE__; |
3598 | ||
3599 | #endif /* PRFS_STOPEXEC */ | |
3600 | return 0; | |
c906108c SS |
3601 | } |
3602 | ||
19958708 | 3603 | static void |
136d6dae | 3604 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3605 | { |
c3f6f71d JM |
3606 | char *exec_file; |
3607 | int pid; | |
3608 | ||
3609 | if (!args) | |
e2e0b3e5 | 3610 | error_no_arg (_("process-id to attach")); |
c3f6f71d JM |
3611 | |
3612 | pid = atoi (args); | |
3613 | if (pid == getpid ()) | |
8a3fe4f8 | 3614 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3615 | |
c3f6f71d | 3616 | if (from_tty) |
c906108c | 3617 | { |
c3f6f71d JM |
3618 | exec_file = get_exec_file (0); |
3619 | ||
3620 | if (exec_file) | |
a3f17187 | 3621 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3622 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3623 | else |
a3f17187 | 3624 | printf_filtered (_("Attaching to %s\n"), |
39f77062 | 3625 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3626 | |
3627 | fflush (stdout); | |
c906108c | 3628 | } |
39f77062 | 3629 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3630 | push_target (ops); |
c3f6f71d JM |
3631 | } |
3632 | ||
19958708 | 3633 | static void |
136d6dae | 3634 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3635 | { |
cc377e6b | 3636 | int sig = 0; |
7f9f62ba | 3637 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3638 | |
3639 | if (args) | |
3640 | sig = atoi (args); | |
c3f6f71d JM |
3641 | |
3642 | if (from_tty) | |
c906108c | 3643 | { |
cc377e6b MK |
3644 | char *exec_file; |
3645 | ||
c3f6f71d | 3646 | exec_file = get_exec_file (0); |
cc377e6b | 3647 | if (exec_file == NULL) |
c3f6f71d | 3648 | exec_file = ""; |
cc377e6b | 3649 | |
a3f17187 | 3650 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3651 | target_pid_to_str (pid_to_ptid (pid))); |
3652 | gdb_flush (gdb_stdout); | |
c906108c | 3653 | } |
19958708 | 3654 | |
cc377e6b MK |
3655 | do_detach (sig); |
3656 | ||
39f77062 | 3657 | inferior_ptid = null_ptid; |
7f9f62ba | 3658 | detach_inferior (pid); |
28439f5e | 3659 | unpush_target (ops); |
c906108c SS |
3660 | } |
3661 | ||
39f77062 KB |
3662 | static ptid_t |
3663 | do_attach (ptid_t ptid) | |
c906108c | 3664 | { |
c3f6f71d | 3665 | procinfo *pi; |
181e7f93 | 3666 | struct inferior *inf; |
c3f6f71d | 3667 | int fail; |
2689673f | 3668 | int lwpid; |
c3f6f71d | 3669 | |
39f77062 | 3670 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3671 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3672 | |
3673 | if (!open_procinfo_files (pi, FD_CTL)) | |
3674 | { | |
3675 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3676 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3677 | PIDGET (ptid)); |
c3f6f71d JM |
3678 | dead_procinfo (pi, errmsg, NOKILL); |
3679 | } | |
c906108c | 3680 | |
c3f6f71d JM |
3681 | /* Stop the process (if it isn't already stopped). */ |
3682 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3683 | { |
c3f6f71d JM |
3684 | pi->was_stopped = 1; |
3685 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3686 | } |
3687 | else | |
3688 | { | |
c3f6f71d JM |
3689 | pi->was_stopped = 0; |
3690 | /* Set the process to run again when we close it. */ | |
3691 | if (!proc_set_run_on_last_close (pi)) | |
3692 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3693 | ||
3694 | /* Now stop the process. */ | |
3695 | if (!proc_stop_process (pi)) | |
3696 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3697 | pi->ignore_next_sigstop = 1; | |
c906108c | 3698 | } |
c3f6f71d JM |
3699 | /* Save some of the /proc state to be restored if we detach. */ |
3700 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3701 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3702 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3703 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3704 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3705 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3706 | NOKILL); | |
37de36c6 | 3707 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3708 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3709 | NOKILL); |
3710 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3711 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3712 | ||
3713 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3714 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3715 | ||
6c95b8df PA |
3716 | inf = current_inferior (); |
3717 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3718 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3719 | inf->attach_flag = 1; |
2689673f PA |
3720 | |
3721 | /* Create a procinfo for the current lwp. */ | |
3722 | lwpid = proc_get_current_thread (pi); | |
3723 | create_procinfo (pi->pid, lwpid); | |
3724 | ||
3725 | /* Add it to gdb's thread list. */ | |
3726 | ptid = MERGEPID (pi->pid, lwpid); | |
3727 | add_thread (ptid); | |
3728 | ||
3729 | return ptid; | |
c906108c SS |
3730 | } |
3731 | ||
3732 | static void | |
fba45db2 | 3733 | do_detach (int signo) |
c906108c | 3734 | { |
c3f6f71d | 3735 | procinfo *pi; |
c906108c | 3736 | |
c3f6f71d | 3737 | /* Find procinfo for the main process */ |
39f77062 | 3738 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3739 | if (signo) |
3740 | if (!proc_set_current_signal (pi, signo)) | |
3741 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3742 | |
c3f6f71d JM |
3743 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3744 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3745 | |
c3f6f71d JM |
3746 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3747 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3748 | ||
37de36c6 | 3749 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3750 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3751 | ||
37de36c6 | 3752 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3753 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3754 | ||
3755 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3756 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3757 | ||
3758 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3759 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3760 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3761 | { |
3762 | /* Clear any pending signal. */ | |
3763 | if (!proc_clear_current_fault (pi)) | |
3764 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3765 | ||
1a303dec MS |
3766 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3767 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3768 | ||
c3f6f71d JM |
3769 | if (!proc_set_run_on_last_close (pi)) |
3770 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3771 | } | |
3772 | ||
c3f6f71d | 3773 | destroy_procinfo (pi); |
c906108c SS |
3774 | } |
3775 | ||
772cf8be MK |
3776 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3777 | for all registers. | |
3778 | ||
3779 | ??? Is the following note still relevant? We can't get individual | |
3780 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3781 | don't bother with caching at all in that case. | |
3782 | ||
3783 | NOTE: Since the /proc interface cannot give us individual | |
3784 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3785 | This results in the possibility that we will do unnecessarily many | |
3786 | fetches, since we may be called repeatedly for individual | |
3787 | registers. So we cache the results, and mark the cache invalid | |
3788 | when the process is resumed. */ | |
c3f6f71d | 3789 | |
c906108c | 3790 | static void |
28439f5e PA |
3791 | procfs_fetch_registers (struct target_ops *ops, |
3792 | struct regcache *regcache, int regnum) | |
c906108c | 3793 | { |
772cf8be MK |
3794 | gdb_gregset_t *gregs; |
3795 | procinfo *pi; | |
3796 | int pid = PIDGET (inferior_ptid); | |
3797 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3798 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3799 | |
2689673f | 3800 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3801 | |
3802 | if (pi == NULL) | |
8a3fe4f8 | 3803 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3804 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3805 | |
772cf8be MK |
3806 | gregs = proc_get_gregs (pi); |
3807 | if (gregs == NULL) | |
c3f6f71d JM |
3808 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3809 | ||
56be3814 | 3810 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3811 | |
40a6adc1 | 3812 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3813 | { |
772cf8be MK |
3814 | gdb_fpregset_t *fpregs; |
3815 | ||
40a6adc1 MD |
3816 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3817 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3818 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3819 | return; /* Not a floating point register. */ |
c5aa993b | 3820 | |
772cf8be MK |
3821 | fpregs = proc_get_fpregs (pi); |
3822 | if (fpregs == NULL) | |
60054393 | 3823 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3824 | |
56be3814 | 3825 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3826 | } |
c906108c SS |
3827 | } |
3828 | ||
772cf8be MK |
3829 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3830 | this for all registers. | |
3831 | ||
3832 | NOTE: Since the /proc interface will not read individual registers, | |
3833 | we will cache these requests until the process is resumed, and only | |
3834 | then write them back to the inferior process. | |
3835 | ||
3836 | FIXME: is that a really bad idea? Have to think about cases where | |
3837 | writing one register might affect the value of others, etc. */ | |
c906108c | 3838 | |
c3f6f71d | 3839 | static void |
28439f5e PA |
3840 | procfs_store_registers (struct target_ops *ops, |
3841 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3842 | { |
772cf8be MK |
3843 | gdb_gregset_t *gregs; |
3844 | procinfo *pi; | |
3845 | int pid = PIDGET (inferior_ptid); | |
3846 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3847 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3848 | |
2689673f | 3849 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3850 | |
3851 | if (pi == NULL) | |
8a3fe4f8 | 3852 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3853 | target_pid_to_str (inferior_ptid)); |
c906108c | 3854 | |
772cf8be MK |
3855 | gregs = proc_get_gregs (pi); |
3856 | if (gregs == NULL) | |
c3f6f71d | 3857 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3858 | |
56be3814 | 3859 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3860 | if (!proc_set_gregs (pi)) |
3861 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3862 | |
40a6adc1 | 3863 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3864 | { |
772cf8be MK |
3865 | gdb_fpregset_t *fpregs; |
3866 | ||
40a6adc1 MD |
3867 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3868 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3869 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3870 | return; /* Not a floating point register. */ |
60054393 | 3871 | |
772cf8be MK |
3872 | fpregs = proc_get_fpregs (pi); |
3873 | if (fpregs == NULL) | |
60054393 MS |
3874 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3875 | ||
56be3814 | 3876 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3877 | if (!proc_set_fpregs (pi)) |
3878 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3879 | } | |
c3f6f71d | 3880 | } |
c906108c | 3881 | |
37de36c6 KB |
3882 | static int |
3883 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3884 | { | |
3885 | ||
3886 | #ifdef SYS_lwp_exit | |
3887 | if (scall == SYS_lwp_exit) | |
3888 | return 1; | |
3889 | #endif | |
3890 | #ifdef SYS_lwpexit | |
3891 | if (scall == SYS_lwpexit) | |
3892 | return 1; | |
3893 | #endif | |
3894 | return 0; | |
3895 | } | |
3896 | ||
3897 | static int | |
3898 | syscall_is_exit (procinfo *pi, int scall) | |
3899 | { | |
3900 | #ifdef SYS_exit | |
3901 | if (scall == SYS_exit) | |
3902 | return 1; | |
3903 | #endif | |
3904 | #ifdef DYNAMIC_SYSCALLS | |
3905 | if (find_syscall (pi, "_exit") == scall) | |
3906 | return 1; | |
3907 | #endif | |
3908 | return 0; | |
3909 | } | |
3910 | ||
3911 | static int | |
3912 | syscall_is_exec (procinfo *pi, int scall) | |
3913 | { | |
3914 | #ifdef SYS_exec | |
3915 | if (scall == SYS_exec) | |
3916 | return 1; | |
3917 | #endif | |
3918 | #ifdef SYS_execv | |
3919 | if (scall == SYS_execv) | |
3920 | return 1; | |
3921 | #endif | |
3922 | #ifdef SYS_execve | |
3923 | if (scall == SYS_execve) | |
3924 | return 1; | |
3925 | #endif | |
3926 | #ifdef DYNAMIC_SYSCALLS | |
3927 | if (find_syscall (pi, "_execve")) | |
3928 | return 1; | |
3929 | if (find_syscall (pi, "ra_execve")) | |
3930 | return 1; | |
3931 | #endif | |
3932 | return 0; | |
3933 | } | |
3934 | ||
3935 | static int | |
3936 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3937 | { | |
3938 | #ifdef SYS_lwp_create | |
3939 | if (scall == SYS_lwp_create) | |
3940 | return 1; | |
3941 | #endif | |
3942 | #ifdef SYS_lwpcreate | |
3943 | if (scall == SYS_lwpcreate) | |
3944 | return 1; | |
3945 | #endif | |
3946 | return 0; | |
3947 | } | |
3948 | ||
7434dadd JB |
3949 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3950 | Does nothing if the breakpoint hasn't been inserted or has already | |
3951 | been removed. */ | |
3952 | ||
3953 | static void | |
3954 | remove_dbx_link_breakpoint (void) | |
3955 | { | |
3956 | if (dbx_link_bpt_addr == 0) | |
3957 | return; | |
3958 | ||
3959 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3960 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3961 | ||
3962 | dbx_link_bpt_addr = 0; | |
3963 | dbx_link_bpt = NULL; | |
3964 | } | |
3965 | ||
3966 | #ifdef SYS_syssgi | |
3967 | /* Return the address of the __dbx_link() function in the file | |
3968 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3969 | the symbol was not found. */ | |
3970 | ||
3971 | static CORE_ADDR | |
3972 | dbx_link_addr (bfd *abfd) | |
3973 | { | |
3974 | long storage_needed; | |
3975 | asymbol **symbol_table; | |
3976 | long number_of_symbols; | |
3977 | long i; | |
3978 | ||
3979 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3980 | if (storage_needed <= 0) | |
3981 | return 0; | |
3982 | ||
3983 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3984 | make_cleanup (xfree, symbol_table); | |
3985 | ||
3986 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3987 | ||
3988 | for (i = 0; i < number_of_symbols; i++) | |
3989 | { | |
3990 | asymbol *sym = symbol_table[i]; | |
3991 | ||
3992 | if ((sym->flags & BSF_GLOBAL) | |
3993 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) | |
3994 | return (sym->value + sym->section->vma); | |
3995 | } | |
3996 | ||
3997 | /* Symbol not found, return NULL. */ | |
3998 | return 0; | |
3999 | } | |
4000 | ||
4001 | /* Search the symbol table of the file referenced by FD for a symbol | |
4002 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
4003 | and return nonzero. Return zero otherwise. */ | |
4004 | ||
4005 | static int | |
4006 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
4007 | { | |
4008 | bfd *abfd; | |
4009 | long storage_needed; | |
4010 | CORE_ADDR sym_addr; | |
4011 | ||
4012 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
4013 | if (abfd == NULL) | |
4014 | { | |
4015 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
4016 | return 0; | |
4017 | } | |
4018 | ||
4019 | if (!bfd_check_format (abfd, bfd_object)) | |
4020 | { | |
4021 | /* Not the correct format, so we can not possibly find the dbx_link | |
4022 | symbol in it. */ | |
4023 | bfd_close (abfd); | |
4024 | return 0; | |
4025 | } | |
4026 | ||
4027 | sym_addr = dbx_link_addr (abfd); | |
4028 | if (sym_addr != 0) | |
4029 | { | |
4030 | /* Insert the breakpoint. */ | |
4031 | dbx_link_bpt_addr = sym_addr; | |
4032 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
4033 | sym_addr); | |
4034 | if (dbx_link_bpt == NULL) | |
4035 | { | |
4036 | warning (_("Failed to insert dbx_link breakpoint.")); | |
4037 | bfd_close (abfd); | |
4038 | return 0; | |
4039 | } | |
4040 | bfd_close (abfd); | |
4041 | return 1; | |
4042 | } | |
4043 | ||
4044 | bfd_close (abfd); | |
4045 | return 0; | |
4046 | } | |
4047 | ||
4048 | /* If the given memory region MAP contains a symbol named __dbx_link, | |
4049 | insert a breakpoint at this location and return nonzero. Return | |
4050 | zero otherwise. */ | |
4051 | ||
4052 | static int | |
4053 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
4054 | int (*child_func) (), | |
4055 | void *data) | |
4056 | { | |
4057 | procinfo *pi = (procinfo *) data; | |
4058 | ||
4059 | /* We know the symbol we're looking for is in a text region, so | |
4060 | only look for it if the region is a text one. */ | |
4061 | if (map->pr_mflags & MA_EXEC) | |
4062 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
4063 | ||
4064 | return 0; | |
4065 | } | |
4066 | ||
4067 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
4068 | insert a breakpoint at its location, and return nonzero. Return zero | |
4069 | otherwise. */ | |
4070 | ||
4071 | static int | |
4072 | insert_dbx_link_breakpoint (procinfo *pi) | |
4073 | { | |
4074 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
4075 | } | |
4076 | #endif | |
4077 | ||
c3f6f71d JM |
4078 | /* |
4079 | * Function: target_wait | |
4080 | * | |
4081 | * Retrieve the next stop event from the child process. | |
4082 | * If child has not stopped yet, wait for it to stop. | |
4083 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
4084 | * into gdb internal event codes. | |
4085 | * | |
4086 | * Return: id of process (and possibly thread) that incurred the event. | |
4087 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
4088 | */ |
4089 | ||
39f77062 | 4090 | static ptid_t |
117de6a9 | 4091 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 4092 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 4093 | { |
c3f6f71d JM |
4094 | /* First cut: loosely based on original version 2.1 */ |
4095 | procinfo *pi; | |
39f77062 KB |
4096 | int wstat; |
4097 | int temp_tid; | |
4098 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
4099 | int why, what, flags; |
4100 | int retry = 0; | |
c906108c | 4101 | |
c3f6f71d | 4102 | wait_again: |
c906108c | 4103 | |
c3f6f71d JM |
4104 | retry++; |
4105 | wstat = 0; | |
39f77062 | 4106 | retval = pid_to_ptid (-1); |
c906108c | 4107 | |
c3f6f71d | 4108 | /* Find procinfo for main process */ |
39f77062 | 4109 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4110 | if (pi) |
c906108c | 4111 | { |
c3f6f71d JM |
4112 | /* We must assume that the status is stale now... */ |
4113 | pi->status_valid = 0; | |
4114 | pi->gregs_valid = 0; | |
4115 | pi->fpregs_valid = 0; | |
4116 | ||
4117 | #if 0 /* just try this out... */ | |
4118 | flags = proc_flags (pi); | |
4119 | why = proc_why (pi); | |
4120 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
4121 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
4122 | #endif | |
4123 | /* If child is not stopped, wait for it to stop. */ | |
4124 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
4125 | !proc_wait_for_stop (pi)) | |
c906108c | 4126 | { |
c3f6f71d JM |
4127 | /* wait_for_stop failed: has the child terminated? */ |
4128 | if (errno == ENOENT) | |
c906108c | 4129 | { |
39f77062 KB |
4130 | int wait_retval; |
4131 | ||
c3f6f71d | 4132 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 4133 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 4134 | |
39f77062 | 4135 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 4136 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 4137 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
4138 | /* FIXME: might I not just use waitpid? |
4139 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 4140 | retval = pid_to_ptid (wait_retval); |
c906108c | 4141 | } |
d1566ff5 FN |
4142 | else if (errno == EINTR) |
4143 | goto wait_again; | |
c3f6f71d | 4144 | else |
c906108c | 4145 | { |
c3f6f71d JM |
4146 | /* Unknown error from wait_for_stop. */ |
4147 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 4148 | } |
c3f6f71d JM |
4149 | } |
4150 | else | |
4151 | { | |
4152 | /* This long block is reached if either: | |
4153 | a) the child was already stopped, or | |
4154 | b) we successfully waited for the child with wait_for_stop. | |
4155 | This block will analyze the /proc status, and translate it | |
4156 | into a waitstatus for GDB. | |
4157 | ||
4158 | If we actually had to call wait because the /proc file | |
19958708 | 4159 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
4160 | because we already have a waitstatus. */ |
4161 | ||
4162 | flags = proc_flags (pi); | |
4163 | why = proc_why (pi); | |
4164 | what = proc_what (pi); | |
4165 | ||
c3f6f71d | 4166 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4167 | { |
c3f6f71d JM |
4168 | #ifdef PR_ASYNC |
4169 | /* If it's running async (for single_thread control), | |
4170 | set it back to normal again. */ | |
4171 | if (flags & PR_ASYNC) | |
4172 | if (!proc_unset_async (pi)) | |
4173 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4174 | #endif | |
4175 | ||
4176 | if (info_verbose) | |
4177 | proc_prettyprint_why (why, what, 1); | |
4178 | ||
4179 | /* The 'pid' we will return to GDB is composed of | |
4180 | the process ID plus the lwp ID. */ | |
4181 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4182 | ||
4183 | switch (why) { | |
4184 | case PR_SIGNALLED: | |
4185 | wstat = (what << 8) | 0177; | |
4186 | break; | |
4187 | case PR_SYSENTRY: | |
37de36c6 | 4188 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4189 | { |
17faa917 DJ |
4190 | if (print_thread_events) |
4191 | printf_unfiltered (_("[%s exited]\n"), | |
4192 | target_pid_to_str (retval)); | |
37de36c6 KB |
4193 | delete_thread (retval); |
4194 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4195 | return retval; | |
4196 | } | |
4197 | else if (syscall_is_exit (pi, what)) | |
4198 | { | |
181e7f93 PA |
4199 | struct inferior *inf; |
4200 | ||
37de36c6 KB |
4201 | /* Handle SYS_exit call only */ |
4202 | /* Stopped at entry to SYS_exit. | |
19958708 | 4203 | Make it runnable, resume it, then use |
37de36c6 | 4204 | the wait system call to get its exit code. |
19958708 | 4205 | Proc_run_process always clears the current |
37de36c6 KB |
4206 | fault and signal. |
4207 | Then return its exit status. */ | |
4208 | pi->status_valid = 0; | |
4209 | wstat = 0; | |
19958708 | 4210 | /* FIXME: what we should do is return |
37de36c6 KB |
4211 | TARGET_WAITKIND_SPURIOUS. */ |
4212 | if (!proc_run_process (pi, 0, 0)) | |
4213 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
4214 | |
4215 | inf = find_inferior_pid (pi->pid); | |
4216 | if (inf->attach_flag) | |
c3f6f71d | 4217 | { |
19958708 | 4218 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
4219 | return a "success" exit code. Bogus: what if |
4220 | it returns something else? */ | |
4221 | wstat = 0; | |
39f77062 | 4222 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4223 | } |
4224 | else | |
4225 | { | |
4226 | int temp = wait (&wstat); | |
4227 | ||
4228 | /* FIXME: shouldn't I make sure I get the right | |
4229 | event from the right process? If (for | |
4230 | instance) I have killed an earlier inferior | |
4231 | process but failed to clean up after it | |
4232 | somehow, I could get its termination event | |
4233 | here. */ | |
4234 | ||
4235 | /* If wait returns -1, that's what we return to GDB. */ | |
4236 | if (temp < 0) | |
39f77062 | 4237 | retval = pid_to_ptid (temp); |
c3f6f71d | 4238 | } |
c3f6f71d | 4239 | } |
37de36c6 KB |
4240 | else |
4241 | { | |
a3f17187 | 4242 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
4243 | proc_prettyprint_syscall (proc_what (pi), 0); |
4244 | printf_filtered ("\n"); | |
4245 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4246 | { |
37de36c6 | 4247 | long i, nsysargs, *sysargs; |
c3f6f71d | 4248 | |
37de36c6 KB |
4249 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4250 | (sysargs = proc_sysargs (pi)) != NULL) | |
4251 | { | |
a3f17187 | 4252 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4253 | for (i = 0; i < nsysargs; i++) |
19958708 | 4254 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4255 | i, sysargs[i]); |
4256 | } | |
c3f6f71d | 4257 | |
c3f6f71d | 4258 | } |
c3f6f71d | 4259 | #endif |
37de36c6 KB |
4260 | if (status) |
4261 | { | |
4262 | /* How to exit gracefully, returning "unknown event" */ | |
4263 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4264 | return inferior_ptid; |
37de36c6 KB |
4265 | } |
4266 | else | |
4267 | { | |
4268 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4269 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4270 | goto wait_again; |
4271 | } | |
4272 | } | |
4273 | break; | |
4274 | case PR_SYSEXIT: | |
4275 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4276 | { |
37de36c6 KB |
4277 | /* Hopefully this is our own "fork-child" execing |
4278 | the real child. Hoax this event into a trap, and | |
4279 | GDB will see the child about to execute its start | |
4280 | address. */ | |
4281 | wstat = (SIGTRAP << 8) | 0177; | |
4282 | } | |
9185ddce JB |
4283 | #ifdef SYS_syssgi |
4284 | else if (what == SYS_syssgi) | |
4285 | { | |
4286 | /* see if we can break on dbx_link(). If yes, then | |
4287 | we no longer need the SYS_syssgi notifications. */ | |
4288 | if (insert_dbx_link_breakpoint (pi)) | |
4289 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4290 | FLAG_RESET, 0); | |
4291 | ||
4292 | /* This is an internal event and should be transparent | |
4293 | to wfi, so resume the execution and wait again. See | |
4294 | comment in procfs_init_inferior() for more details. */ | |
4295 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4296 | goto wait_again; | |
4297 | } | |
4298 | #endif | |
37de36c6 KB |
4299 | else if (syscall_is_lwp_create (pi, what)) |
4300 | { | |
4301 | /* | |
4302 | * This syscall is somewhat like fork/exec. | |
4303 | * We will get the event twice: once for the parent LWP, | |
4304 | * and once for the child. We should already know about | |
4305 | * the parent LWP, but the child will be new to us. So, | |
4306 | * whenever we get this event, if it represents a new | |
4307 | * thread, simply add the thread to the list. | |
4308 | */ | |
c3f6f71d | 4309 | |
37de36c6 | 4310 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4311 | temp_tid = proc_get_current_thread (pi); |
4312 | if (!find_procinfo (pi->pid, temp_tid)) | |
4313 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4314 | |
39f77062 | 4315 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4316 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4317 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4318 | add_thread (temp_ptid); |
4319 | ||
37de36c6 KB |
4320 | /* Return to WFI, but tell it to immediately resume. */ |
4321 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4322 | return inferior_ptid; |
37de36c6 KB |
4323 | } |
4324 | else if (syscall_is_lwp_exit (pi, what)) | |
4325 | { | |
17faa917 DJ |
4326 | if (print_thread_events) |
4327 | printf_unfiltered (_("[%s exited]\n"), | |
4328 | target_pid_to_str (retval)); | |
37de36c6 KB |
4329 | delete_thread (retval); |
4330 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4331 | return retval; | |
c3f6f71d | 4332 | } |
37de36c6 KB |
4333 | else if (0) |
4334 | { | |
4335 | /* FIXME: Do we need to handle SYS_sproc, | |
4336 | SYS_fork, or SYS_vfork here? The old procfs | |
4337 | seemed to use this event to handle threads on | |
4338 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4339 | that threads were actually separate processes. |
37de36c6 KB |
4340 | Irix, maybe? Anyway, low priority for now. */ |
4341 | } | |
4342 | else | |
4343 | { | |
a3f17187 | 4344 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4345 | proc_prettyprint_syscall (proc_what (pi), 0); |
4346 | printf_filtered ("\n"); | |
4347 | #ifndef PIOCSSPCACT | |
4348 | { | |
4349 | long i, nsysargs, *sysargs; | |
4350 | ||
4351 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4352 | (sysargs = proc_sysargs (pi)) != NULL) | |
4353 | { | |
a3f17187 | 4354 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4355 | for (i = 0; i < nsysargs; i++) |
19958708 | 4356 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4357 | i, sysargs[i]); |
4358 | } | |
4359 | } | |
c3f6f71d | 4360 | #endif |
37de36c6 | 4361 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4362 | return inferior_ptid; |
37de36c6 | 4363 | } |
c3f6f71d JM |
4364 | break; |
4365 | case PR_REQUESTED: | |
4366 | #if 0 /* FIXME */ | |
4367 | wstat = (SIGSTOP << 8) | 0177; | |
4368 | break; | |
4369 | #else | |
4370 | if (retry < 5) | |
4371 | { | |
a3f17187 | 4372 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4373 | pi->status_valid = 0; |
4374 | goto wait_again; | |
4375 | } | |
4376 | else | |
4377 | { | |
4378 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4379 | temp_tid = proc_get_current_thread (pi); |
4380 | if (!find_procinfo (pi->pid, temp_tid)) | |
4381 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4382 | |
4383 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4384 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4385 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4386 | add_thread (temp_ptid); |
c3f6f71d JM |
4387 | |
4388 | status->kind = TARGET_WAITKIND_STOPPED; | |
4389 | status->value.sig = 0; | |
4390 | return retval; | |
4391 | } | |
4392 | #endif | |
4393 | case PR_JOBCONTROL: | |
4394 | wstat = (what << 8) | 0177; | |
4395 | break; | |
4396 | case PR_FAULTED: | |
7af6341f | 4397 | switch (what) { |
c3f6f71d JM |
4398 | #ifdef FLTWATCH |
4399 | case FLTWATCH: | |
4400 | wstat = (SIGTRAP << 8) | 0177; | |
4401 | break; | |
4402 | #endif | |
4403 | #ifdef FLTKWATCH | |
4404 | case FLTKWATCH: | |
4405 | wstat = (SIGTRAP << 8) | 0177; | |
4406 | break; | |
4407 | #endif | |
4408 | /* FIXME: use si_signo where possible. */ | |
4409 | case FLTPRIV: | |
4410 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4411 | case FLTILL: | |
4412 | #endif | |
4413 | wstat = (SIGILL << 8) | 0177; | |
4414 | break; | |
4415 | case FLTBPT: | |
4416 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4417 | case FLTTRACE: | |
4418 | #endif | |
9185ddce JB |
4419 | /* If we hit our __dbx_link() internal breakpoint, |
4420 | then remove it. See comments in procfs_init_inferior() | |
4421 | for more details. */ | |
4422 | if (dbx_link_bpt_addr != 0 | |
fb14de7b UW |
4423 | && dbx_link_bpt_addr |
4424 | == regcache_read_pc (get_current_regcache ())) | |
9185ddce JB |
4425 | remove_dbx_link_breakpoint (); |
4426 | ||
c3f6f71d JM |
4427 | wstat = (SIGTRAP << 8) | 0177; |
4428 | break; | |
4429 | case FLTSTACK: | |
4430 | case FLTACCESS: | |
4431 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4432 | case FLTBOUNDS: | |
4433 | #endif | |
4434 | wstat = (SIGSEGV << 8) | 0177; | |
4435 | break; | |
4436 | case FLTIOVF: | |
4437 | case FLTIZDIV: | |
4438 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4439 | case FLTFPE: | |
4440 | #endif | |
4441 | wstat = (SIGFPE << 8) | 0177; | |
4442 | break; | |
4443 | case FLTPAGE: /* Recoverable page fault */ | |
4444 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4445 | retval = pid_to_ptid (-1); |
c3f6f71d | 4446 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4447 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4448 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4449 | error (_("... giving up...")); |
c3f6f71d JM |
4450 | break; |
4451 | } | |
4452 | break; /* case PR_FAULTED: */ | |
4453 | default: /* switch (why) unmatched */ | |
4454 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4455 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4456 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4457 | error (_("... giving up...")); |
c3f6f71d JM |
4458 | break; |
4459 | } | |
4460 | /* | |
4461 | * Got this far without error: | |
4462 | * If retval isn't in the threads database, add it. | |
4463 | */ | |
39f77062 KB |
4464 | if (PIDGET (retval) > 0 && |
4465 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4466 | !in_thread_list (retval)) |
c906108c | 4467 | { |
c3f6f71d | 4468 | /* |
19958708 | 4469 | * We have a new thread. |
c3f6f71d | 4470 | * We need to add it both to GDB's list and to our own. |
19958708 | 4471 | * If we don't create a procinfo, resume may be unhappy |
c3f6f71d JM |
4472 | * later. |
4473 | */ | |
c3f6f71d JM |
4474 | add_thread (retval); |
4475 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4476 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4477 | } |
c906108c | 4478 | } |
c3f6f71d | 4479 | else /* flags do not indicate STOPPED */ |
c906108c | 4480 | { |
c3f6f71d JM |
4481 | /* surely this can't happen... */ |
4482 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4483 | __LINE__); | |
4484 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4485 | error (_("procfs: ...giving up...")); |
c906108c | 4486 | } |
c906108c | 4487 | } |
c906108c | 4488 | |
c3f6f71d JM |
4489 | if (status) |
4490 | store_waitstatus (status, wstat); | |
c906108c SS |
4491 | } |
4492 | ||
c3f6f71d JM |
4493 | return retval; |
4494 | } | |
c906108c | 4495 | |
4e73f23d RM |
4496 | /* Perform a partial transfer to/from the specified object. For |
4497 | memory transfers, fall back to the old memory xfer functions. */ | |
4498 | ||
4499 | static LONGEST | |
4500 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4501 | const char *annex, gdb_byte *readbuf, |
4502 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4503 | { |
4504 | switch (object) | |
4505 | { | |
4506 | case TARGET_OBJECT_MEMORY: | |
4507 | if (readbuf) | |
0b62613e PA |
4508 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4509 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4510 | if (writebuf) |
0b62613e PA |
4511 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4512 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4513 | return -1; |
4514 | ||
4515 | #ifdef NEW_PROC_API | |
4516 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4517 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4518 | offset, len); |
4519 | #endif | |
4520 | ||
4521 | default: | |
4522 | if (ops->beneath != NULL) | |
4523 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4524 | readbuf, writebuf, offset, len); | |
4525 | return -1; | |
4526 | } | |
4527 | } | |
4528 | ||
4529 | ||
d0849a9a KB |
4530 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4531 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4532 | otherwise transfer them from the target. TARGET is unused. | |
4533 | ||
4534 | The return value is 0 if an error occurred or no bytes were | |
4535 | transferred. Otherwise, it will be a positive value which | |
4536 | indicates the number of bytes transferred between gdb and the | |
4537 | target. (Note that the interface also makes provisions for | |
4538 | negative values, but this capability isn't implemented here.) */ | |
4539 | ||
c3f6f71d | 4540 | static int |
0b62613e | 4541 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4542 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4543 | { |
4544 | procinfo *pi; | |
4545 | int nbytes = 0; | |
c906108c | 4546 | |
c3f6f71d | 4547 | /* Find procinfo for main process */ |
39f77062 | 4548 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4549 | if (pi->as_fd == 0 && |
4550 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4551 | { |
c3f6f71d JM |
4552 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4553 | return 0; | |
c906108c | 4554 | } |
c906108c | 4555 | |
c3f6f71d | 4556 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4557 | { |
c3f6f71d | 4558 | if (dowrite) |
c906108c | 4559 | { |
c3f6f71d JM |
4560 | #ifdef NEW_PROC_API |
4561 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4562 | #else |
c3f6f71d | 4563 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4564 | #endif |
c3f6f71d | 4565 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4566 | } |
c3f6f71d | 4567 | else |
c906108c | 4568 | { |
c3f6f71d JM |
4569 | PROCFS_NOTE ("read memory: \n"); |
4570 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4571 | } |
c3f6f71d | 4572 | if (nbytes < 0) |
c906108c | 4573 | { |
c3f6f71d | 4574 | nbytes = 0; |
c906108c | 4575 | } |
c906108c | 4576 | } |
c3f6f71d | 4577 | return nbytes; |
c906108c SS |
4578 | } |
4579 | ||
4580 | /* | |
c3f6f71d JM |
4581 | * Function: invalidate_cache |
4582 | * | |
4583 | * Called by target_resume before making child runnable. | |
4584 | * Mark cached registers and status's invalid. | |
4585 | * If there are "dirty" caches that need to be written back | |
4586 | * to the child process, do that. | |
4587 | * | |
19958708 | 4588 | * File descriptors are also cached. |
c3f6f71d JM |
4589 | * As they are a limited resource, we cannot hold onto them indefinitely. |
4590 | * However, as they are expensive to open, we don't want to throw them | |
4591 | * away indescriminately either. As a compromise, we will keep the | |
4592 | * file descriptors for the parent process, but discard any file | |
4593 | * descriptors we may have accumulated for the threads. | |
4594 | * | |
4595 | * Return value: | |
19958708 | 4596 | * As this function is called by iterate_over_threads, it always |
c3f6f71d | 4597 | * returns zero (so that iterate_over_threads will keep iterating). |
c906108c SS |
4598 | */ |
4599 | ||
c3f6f71d JM |
4600 | |
4601 | static int | |
fba45db2 | 4602 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4603 | { |
c3f6f71d JM |
4604 | /* |
4605 | * About to run the child; invalidate caches and do any other cleanup. | |
4606 | */ | |
c906108c | 4607 | |
c3f6f71d JM |
4608 | #if 0 |
4609 | if (pi->gregs_dirty) | |
4610 | if (parent == NULL || | |
4611 | proc_get_current_thread (parent) != pi->tid) | |
4612 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4613 | proc_warn (pi, "target_resume, set_gregs", | |
4614 | __LINE__); | |
a97b0ac8 | 4615 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4616 | if (pi->fpregs_dirty) |
4617 | if (parent == NULL || | |
4618 | proc_get_current_thread (parent) != pi->tid) | |
4619 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4620 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4621 | __LINE__); |
c906108c | 4622 | #endif |
c906108c | 4623 | |
c3f6f71d | 4624 | if (parent != NULL) |
c906108c | 4625 | { |
c3f6f71d | 4626 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4627 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4628 | We don't do this to the master (parent) procinfo. */ |
4629 | ||
4630 | close_procinfo_files (pi); | |
c906108c | 4631 | } |
c3f6f71d JM |
4632 | pi->gregs_valid = 0; |
4633 | pi->fpregs_valid = 0; | |
4634 | #if 0 | |
4635 | pi->gregs_dirty = 0; | |
4636 | pi->fpregs_dirty = 0; | |
c906108c | 4637 | #endif |
c3f6f71d JM |
4638 | pi->status_valid = 0; |
4639 | pi->threads_valid = 0; | |
c906108c | 4640 | |
c3f6f71d | 4641 | return 0; |
c906108c SS |
4642 | } |
4643 | ||
0fda6bd2 | 4644 | #if 0 |
c906108c | 4645 | /* |
c3f6f71d JM |
4646 | * Function: make_signal_thread_runnable |
4647 | * | |
4648 | * A callback function for iterate_over_threads. | |
4649 | * Find the asynchronous signal thread, and make it runnable. | |
4650 | * See if that helps matters any. | |
c906108c SS |
4651 | */ |
4652 | ||
c3f6f71d | 4653 | static int |
fba45db2 | 4654 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4655 | { |
c3f6f71d JM |
4656 | #ifdef PR_ASLWP |
4657 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4658 | { |
c3f6f71d JM |
4659 | if (!proc_run_process (pi, 0, -1)) |
4660 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4661 | return 1; | |
c906108c | 4662 | } |
c906108c | 4663 | #endif |
c3f6f71d | 4664 | return 0; |
c906108c | 4665 | } |
0fda6bd2 | 4666 | #endif |
c906108c SS |
4667 | |
4668 | /* | |
c3f6f71d JM |
4669 | * Function: target_resume |
4670 | * | |
4671 | * Make the child process runnable. Normally we will then call | |
4672 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4673 | * | |
4674 | * Arguments: | |
19958708 | 4675 | * step: if true, then arrange for the child to stop again |
c3f6f71d JM |
4676 | * after executing a single instruction. |
4677 | * signo: if zero, then cancel any pending signal. | |
19958708 | 4678 | * If non-zero, then arrange for the indicated signal |
c3f6f71d JM |
4679 | * to be delivered to the child when it runs. |
4680 | * pid: if -1, then allow any child thread to run. | |
4681 | * if non-zero, then allow only the indicated thread to run. | |
4682 | ******* (not implemented yet) | |
c906108c SS |
4683 | */ |
4684 | ||
4685 | static void | |
28439f5e PA |
4686 | procfs_resume (struct target_ops *ops, |
4687 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4688 | { |
c3f6f71d JM |
4689 | procinfo *pi, *thread; |
4690 | int native_signo; | |
4691 | ||
19958708 | 4692 | /* 2.1: |
c3f6f71d | 4693 | prrun.prflags |= PRSVADDR; |
19958708 | 4694 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4695 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4696 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4697 | prrun.prflags |= PRCFAULT; clear current fault. |
4698 | ||
4699 | PRSTRACE and PRSFAULT can be done by other means | |
4700 | (proc_trace_signals, proc_trace_faults) | |
4701 | PRSVADDR is unnecessary. | |
4702 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4703 | This basically leaves PRSTEP and PRCSIG. | |
4704 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4705 | So basically PR_STEP is the sole argument that must be passed | |
4706 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4707 | ||
4708 | /* Find procinfo for main process */ | |
39f77062 | 4709 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4710 | |
4711 | /* First cut: ignore pid argument */ | |
4712 | errno = 0; | |
c906108c | 4713 | |
c3f6f71d JM |
4714 | /* Convert signal to host numbering. */ |
4715 | if (signo == 0 || | |
0fda6bd2 | 4716 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4717 | native_signo = 0; |
4718 | else | |
4719 | native_signo = target_signal_to_host (signo); | |
c906108c | 4720 | |
c3f6f71d | 4721 | pi->ignore_next_sigstop = 0; |
c906108c | 4722 | |
c3f6f71d JM |
4723 | /* Running the process voids all cached registers and status. */ |
4724 | /* Void the threads' caches first */ | |
19958708 | 4725 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4726 | /* Void the process procinfo's caches. */ |
4727 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4728 | |
39f77062 | 4729 | if (PIDGET (ptid) != -1) |
c906108c | 4730 | { |
c3f6f71d | 4731 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4732 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4733 | if (thread != NULL) |
c906108c | 4734 | { |
c3f6f71d JM |
4735 | if (thread->tid != 0) |
4736 | { | |
4737 | /* We're to resume a specific thread, and not the others. | |
4738 | * Set the child process's PR_ASYNC flag. | |
4739 | */ | |
4740 | #ifdef PR_ASYNC | |
4741 | if (!proc_set_async (pi)) | |
4742 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4743 | #endif | |
4744 | #if 0 | |
19958708 | 4745 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4746 | make_signal_thread_runnable, |
4747 | NULL); | |
4748 | #endif | |
4749 | pi = thread; /* substitute the thread's procinfo for run */ | |
4750 | } | |
c906108c SS |
4751 | } |
4752 | } | |
c906108c | 4753 | |
c3f6f71d | 4754 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4755 | { |
c3f6f71d | 4756 | if (errno == EBUSY) |
8a3fe4f8 | 4757 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); |
c3f6f71d JM |
4758 | else |
4759 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4760 | } |
c3f6f71d | 4761 | } |
c906108c | 4762 | |
c3f6f71d JM |
4763 | /* |
4764 | * Function: register_gdb_signals | |
4765 | * | |
19958708 | 4766 | * Traverse the list of signals that GDB knows about |
c3f6f71d JM |
4767 | * (see "handle" command), and arrange for the target |
4768 | * to be stopped or not, according to these settings. | |
4769 | * | |
4770 | * Returns non-zero for success, zero for failure. | |
4771 | */ | |
c906108c | 4772 | |
c3f6f71d | 4773 | static int |
37de36c6 | 4774 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4775 | { |
4776 | int signo; | |
c906108c | 4777 | |
c3f6f71d JM |
4778 | for (signo = 0; signo < NSIG; signo ++) |
4779 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4780 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4781 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
3c95f01c | 4782 | gdb_prdelset (signals, signo); |
c3f6f71d | 4783 | else |
3c95f01c | 4784 | gdb_praddset (signals, signo); |
c906108c | 4785 | |
c3f6f71d | 4786 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4787 | } |
4788 | ||
4789 | /* | |
c3f6f71d JM |
4790 | * Function: target_notice_signals |
4791 | * | |
4792 | * Set up to trace signals in the child process. | |
4793 | */ | |
c906108c | 4794 | |
c3f6f71d | 4795 | static void |
39f77062 | 4796 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4797 | { |
37de36c6 | 4798 | gdb_sigset_t signals; |
39f77062 | 4799 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4800 | |
c3f6f71d JM |
4801 | if (proc_get_traced_signals (pi, &signals) && |
4802 | register_gdb_signals (pi, &signals)) | |
4803 | return; | |
4804 | else | |
4805 | proc_error (pi, "notice_signals", __LINE__); | |
4806 | } | |
c906108c | 4807 | |
c3f6f71d JM |
4808 | /* |
4809 | * Function: target_files_info | |
4810 | * | |
4811 | * Print status information about the child process. | |
4812 | */ | |
c906108c | 4813 | |
c3f6f71d | 4814 | static void |
fba45db2 | 4815 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4816 | { |
181e7f93 | 4817 | struct inferior *inf = current_inferior (); |
a3f17187 | 4818 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4819 | inf->attach_flag? "attached": "child", |
39f77062 | 4820 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4821 | } |
c906108c | 4822 | |
c3f6f71d JM |
4823 | /* |
4824 | * Function: target_stop | |
4825 | * | |
4826 | * Stop the child process asynchronously, as when the | |
4827 | * gdb user types control-c or presses a "stop" button. | |
4828 | * | |
4829 | * Works by sending kill(SIGINT) to the child's process group. | |
4830 | */ | |
c906108c | 4831 | |
c3f6f71d | 4832 | static void |
f9c72d52 | 4833 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4834 | { |
7e1789f5 | 4835 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4836 | } |
4837 | ||
c906108c | 4838 | /* |
c3f6f71d JM |
4839 | * Function: unconditionally_kill_inferior |
4840 | * | |
4841 | * Make it die. Wait for it to die. Clean up after it. | |
19958708 | 4842 | * Note: this should only be applied to the real process, |
c3f6f71d JM |
4843 | * not to an LWP, because of the check for parent-process. |
4844 | * If we need this to work for an LWP, it needs some more logic. | |
4845 | */ | |
c906108c | 4846 | |
c3f6f71d | 4847 | static void |
fba45db2 | 4848 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4849 | { |
4850 | int parent_pid; | |
c906108c | 4851 | |
c3f6f71d JM |
4852 | parent_pid = proc_parent_pid (pi); |
4853 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4854 | /* FIXME: use access functions */ | |
4855 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4856 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4857 | file for the inferior. */ | |
4858 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4859 | { | |
4860 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4861 | } | |
4862 | #endif | |
4863 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4864 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4865 | to kill the inferior, otherwise it might remain stopped with a | |
4866 | pending SIGKILL. | |
4867 | We do not check the result of the PIOCSSIG, the inferior might have | |
4868 | died already. */ | |
4869 | { | |
37de36c6 | 4870 | gdb_siginfo_t newsiginfo; |
c906108c | 4871 | |
c3f6f71d JM |
4872 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4873 | newsiginfo.si_signo = SIGKILL; | |
4874 | newsiginfo.si_code = 0; | |
4875 | newsiginfo.si_errno = 0; | |
4876 | newsiginfo.si_pid = getpid (); | |
4877 | newsiginfo.si_uid = getuid (); | |
4878 | /* FIXME: use proc_set_current_signal */ | |
4879 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4880 | } | |
4881 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4882 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4883 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4884 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4885 | destroy_procinfo (pi); | |
c906108c | 4886 | |
c3f6f71d JM |
4887 | /* If pi is GDB's child, wait for it to die. */ |
4888 | if (parent_pid == getpid ()) | |
19958708 | 4889 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4890 | Should we check the returned event? */ |
4891 | { | |
0d06e24b | 4892 | #if 0 |
c3f6f71d | 4893 | int status, ret; |
c906108c | 4894 | |
c3f6f71d JM |
4895 | ret = waitpid (pi->pid, &status, 0); |
4896 | #else | |
4897 | wait (NULL); | |
4898 | #endif | |
4899 | } | |
4900 | } | |
c906108c | 4901 | |
c3f6f71d JM |
4902 | /* |
4903 | * Function: target_kill_inferior | |
4904 | * | |
4905 | * We're done debugging it, and we want it to go away. | |
4906 | * Then we want GDB to forget all about it. | |
c906108c SS |
4907 | */ |
4908 | ||
19958708 | 4909 | static void |
7d85a9c0 | 4910 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4911 | { |
39f77062 | 4912 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4913 | { |
4914 | /* Find procinfo for main process */ | |
39f77062 | 4915 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4916 | |
c3f6f71d JM |
4917 | if (pi) |
4918 | unconditionally_kill_inferior (pi); | |
4919 | target_mourn_inferior (); | |
c906108c | 4920 | } |
c3f6f71d JM |
4921 | } |
4922 | ||
4923 | /* | |
4924 | * Function: target_mourn_inferior | |
4925 | * | |
4926 | * Forget we ever debugged this thing! | |
4927 | */ | |
c906108c | 4928 | |
19958708 | 4929 | static void |
136d6dae | 4930 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4931 | { |
4932 | procinfo *pi; | |
c906108c | 4933 | |
39f77062 | 4934 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4935 | { |
4936 | /* Find procinfo for main process */ | |
39f77062 | 4937 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4938 | if (pi) |
4939 | destroy_procinfo (pi); | |
c906108c | 4940 | } |
28439f5e | 4941 | unpush_target (ops); |
8181d85f DJ |
4942 | |
4943 | if (dbx_link_bpt != NULL) | |
4944 | { | |
a6d9a66e | 4945 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
4946 | dbx_link_bpt_addr = 0; |
4947 | dbx_link_bpt = NULL; | |
4948 | } | |
4949 | ||
c3f6f71d JM |
4950 | generic_mourn_inferior (); |
4951 | } | |
c906108c | 4952 | |
c3f6f71d JM |
4953 | /* |
4954 | * Function: init_inferior | |
4955 | * | |
19958708 | 4956 | * When GDB forks to create a runnable inferior process, |
c3f6f71d JM |
4957 | * this function is called on the parent side of the fork. |
4958 | * It's job is to do whatever is necessary to make the child | |
4959 | * ready to be debugged, and then wait for the child to synchronize. | |
4960 | */ | |
c906108c | 4961 | |
19958708 | 4962 | static void |
28439f5e | 4963 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4964 | { |
4965 | procinfo *pi; | |
37de36c6 | 4966 | gdb_sigset_t signals; |
c3f6f71d | 4967 | int fail; |
2689673f | 4968 | int lwpid; |
c906108c | 4969 | |
c3f6f71d JM |
4970 | /* This routine called on the parent side (GDB side) |
4971 | after GDB forks the inferior. */ | |
28439f5e | 4972 | push_target (ops); |
c906108c | 4973 | |
c3f6f71d JM |
4974 | if ((pi = create_procinfo (pid, 0)) == NULL) |
4975 | perror ("procfs: out of memory in 'init_inferior'"); | |
4976 | ||
4977 | if (!open_procinfo_files (pi, FD_CTL)) | |
4978 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4979 | ||
4980 | /* | |
4981 | xmalloc // done | |
4982 | open_procinfo_files // done | |
4983 | link list // done | |
4984 | prfillset (trace) | |
4985 | procfs_notice_signals | |
4986 | prfillset (fault) | |
4987 | prdelset (FLTPAGE) | |
4988 | PIOCWSTOP | |
4989 | PIOCSFAULT | |
4990 | */ | |
4991 | ||
4992 | /* If not stopped yet, wait for it to stop. */ | |
4993 | if (!(proc_flags (pi) & PR_STOPPED) && | |
4994 | !(proc_wait_for_stop (pi))) | |
4995 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4996 | ||
4997 | /* Save some of the /proc state to be restored if we detach. */ | |
4998 | /* FIXME: Why? In case another debugger was debugging it? | |
4999 | We're it's parent, for Ghu's sake! */ | |
5000 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
5001 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
5002 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
5003 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
5004 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
5005 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 5006 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 5007 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 5008 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
5009 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
5010 | ||
5011 | /* Register to trace selected signals in the child. */ | |
5012 | prfillset (&signals); | |
5013 | if (!register_gdb_signals (pi, &signals)) | |
5014 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
5015 | ||
5016 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
5017 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
5018 | ||
0d06e24b JM |
5019 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
5020 | and possibly even turning ON kill-on-last-close at this point. But | |
5021 | I can't make that change without careful testing which I don't have | |
5022 | time to do right now... */ | |
c3f6f71d JM |
5023 | /* Turn on run-on-last-close flag so that the child |
5024 | will die if GDB goes away for some reason. */ | |
5025 | if (!proc_set_run_on_last_close (pi)) | |
5026 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
5027 | ||
2689673f PA |
5028 | /* We now have have access to the lwpid of the main thread/lwp. */ |
5029 | lwpid = proc_get_current_thread (pi); | |
5030 | ||
5031 | /* Create a procinfo for the main lwp. */ | |
5032 | create_procinfo (pid, lwpid); | |
5033 | ||
5034 | /* We already have a main thread registered in the thread table at | |
5035 | this point, but it didn't have any lwp info yet. Notify the core | |
5036 | about it. This changes inferior_ptid as well. */ | |
5037 | thread_change_ptid (pid_to_ptid (pid), | |
5038 | MERGEPID (pid, lwpid)); | |
c906108c | 5039 | |
46ac7a5d AC |
5040 | /* Typically two, one trap to exec the shell, one to exec the |
5041 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 5042 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
5043 | |
5044 | #ifdef SYS_syssgi | |
5045 | /* On mips-irix, we need to stop the inferior early enough during | |
5046 | the startup phase in order to be able to load the shared library | |
5047 | symbols and insert the breakpoints that are located in these shared | |
5048 | libraries. Stopping at the program entry point is not good enough | |
5049 | because the -init code is executed before the execution reaches | |
5050 | that point. | |
5051 | ||
5052 | So what we need to do is to insert a breakpoint in the runtime | |
5053 | loader (rld), more precisely in __dbx_link(). This procedure is | |
5054 | called by rld once all shared libraries have been mapped, but before | |
5055 | the -init code is executed. Unfortuantely, this is not straightforward, | |
5056 | as rld is not part of the executable we are running, and thus we need | |
5057 | the inferior to run until rld itself has been mapped in memory. | |
5058 | ||
5059 | For this, we trace all syssgi() syscall exit events. Each time | |
5060 | we detect such an event, we iterate over each text memory maps, | |
5061 | get its associated fd, and scan the symbol table for __dbx_link(). | |
5062 | When found, we know that rld has been mapped, and that we can insert | |
5063 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
5064 | has been inserted, the syssgi() notifications are no longer necessary, | |
5065 | so they should be canceled. */ | |
5066 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 5067 | #endif |
c3f6f71d | 5068 | } |
c906108c | 5069 | |
c3f6f71d JM |
5070 | /* |
5071 | * Function: set_exec_trap | |
5072 | * | |
5073 | * When GDB forks to create a new process, this function is called | |
5074 | * on the child side of the fork before GDB exec's the user program. | |
5075 | * Its job is to make the child minimally debuggable, so that the | |
5076 | * parent GDB process can connect to the child and take over. | |
5077 | * This function should do only the minimum to make that possible, | |
5078 | * and to synchronize with the parent process. The parent process | |
5079 | * should take care of the details. | |
5080 | */ | |
5081 | ||
5082 | static void | |
fba45db2 | 5083 | procfs_set_exec_trap (void) |
c3f6f71d JM |
5084 | { |
5085 | /* This routine called on the child side (inferior side) | |
5086 | after GDB forks the inferior. It must use only local variables, | |
5087 | because it may be sharing data space with its parent. */ | |
c906108c | 5088 | |
c3f6f71d | 5089 | procinfo *pi; |
37de36c6 | 5090 | sysset_t *exitset; |
c906108c | 5091 | |
c3f6f71d | 5092 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 5093 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 5094 | |
c3f6f71d JM |
5095 | if (open_procinfo_files (pi, FD_CTL) == 0) |
5096 | { | |
5097 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
5098 | gdb_flush (gdb_stderr); | |
5099 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
5100 | _exit (127); | |
5101 | } | |
c906108c | 5102 | |
c3f6f71d JM |
5103 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
5104 | /* OSF method for tracing exec syscalls. Quoting: | |
5105 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
5106 | exits from exec system calls because of the user level loader. */ | |
5107 | /* FIXME: make nice and maybe move into an access function. */ | |
5108 | { | |
5109 | int prfs_flags; | |
c906108c | 5110 | |
c3f6f71d JM |
5111 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
5112 | { | |
5113 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
5114 | gdb_flush (gdb_stderr); | |
5115 | _exit (127); | |
5116 | } | |
5117 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 5118 | |
c3f6f71d JM |
5119 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
5120 | { | |
5121 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
5122 | gdb_flush (gdb_stderr); | |
5123 | _exit (127); | |
5124 | } | |
5125 | } | |
5126 | #else /* not PRFS_STOPEXEC */ | |
5127 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
5128 | /* GW: Rationale... | |
5129 | Not all systems with /proc have all the exec* syscalls with the same | |
5130 | names. On the SGI, for example, there is no SYS_exec, but there | |
5131 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 5132 | |
37de36c6 KB |
5133 | exitset = sysset_t_alloc (pi); |
5134 | gdb_premptysysset (exitset); | |
c3f6f71d | 5135 | #ifdef SYS_exec |
37de36c6 | 5136 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
5137 | #endif |
5138 | #ifdef SYS_execve | |
37de36c6 | 5139 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
5140 | #endif |
5141 | #ifdef SYS_execv | |
37de36c6 | 5142 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 5143 | #endif |
37de36c6 KB |
5144 | #ifdef DYNAMIC_SYSCALLS |
5145 | { | |
5146 | int callnum = find_syscall (pi, "execve"); | |
5147 | ||
5148 | if (callnum >= 0) | |
5149 | gdb_praddsysset (exitset, callnum); | |
c906108c | 5150 | |
37de36c6 KB |
5151 | callnum = find_syscall (pi, "ra_execve"); |
5152 | if (callnum >= 0) | |
5153 | gdb_praddsysset (exitset, callnum); | |
5154 | } | |
5155 | #endif /* DYNAMIC_SYSCALLS */ | |
5156 | ||
5157 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 5158 | { |
c3f6f71d JM |
5159 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
5160 | gdb_flush (gdb_stderr); | |
5161 | _exit (127); | |
c906108c | 5162 | } |
c3f6f71d JM |
5163 | #endif /* PRFS_STOPEXEC */ |
5164 | ||
5165 | /* FIXME: should this be done in the parent instead? */ | |
5166 | /* Turn off inherit on fork flag so that all grand-children | |
5167 | of gdb start with tracing flags cleared. */ | |
5168 | if (!proc_unset_inherit_on_fork (pi)) | |
5169 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
5170 | ||
5171 | /* Turn off run on last close flag, so that the child process | |
5172 | cannot run away just because we close our handle on it. | |
5173 | We want it to wait for the parent to attach. */ | |
5174 | if (!proc_unset_run_on_last_close (pi)) | |
5175 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
5176 | ||
19958708 | 5177 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
5178 | we have our own address space, and we're about to do an exec! */ |
5179 | /*destroy_procinfo (pi);*/ | |
c906108c | 5180 | } |
c906108c | 5181 | |
c3f6f71d JM |
5182 | /* |
5183 | * Function: create_inferior | |
5184 | * | |
5185 | * This function is called BEFORE gdb forks the inferior process. | |
19958708 | 5186 | * Its only real responsibility is to set things up for the fork, |
c3f6f71d JM |
5187 | * and tell GDB which two functions to call after the fork (one |
5188 | * for the parent, and one for the child). | |
19958708 | 5189 | * |
c3f6f71d JM |
5190 | * This function does a complicated search for a unix shell program, |
5191 | * which it then uses to parse arguments and environment variables | |
5192 | * to be sent to the child. I wonder whether this code could not | |
5193 | * be abstracted out and shared with other unix targets such as | |
5194 | * infptrace? | |
5195 | */ | |
c906108c SS |
5196 | |
5197 | static void | |
136d6dae VP |
5198 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
5199 | char *allargs, char **env, int from_tty) | |
c906108c SS |
5200 | { |
5201 | char *shell_file = getenv ("SHELL"); | |
5202 | char *tryname; | |
28439f5e PA |
5203 | int pid; |
5204 | ||
c906108c SS |
5205 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
5206 | { | |
5207 | ||
5208 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5209 | just do this the normal way (via execlp, which operates by |
5210 | attempting an exec for each element of the PATH until it | |
5211 | finds one which succeeds), then there will be an exec for | |
5212 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5213 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5214 | for these failed execs with the ones for successful execs | |
5215 | (whether the exec has succeeded is stored at that time in the | |
5216 | carry bit or some such architecture-specific and | |
5217 | non-ABI-specified place). | |
5218 | ||
5219 | So I can't think of anything better than to search the PATH | |
5220 | now. This has several disadvantages: (1) There is a race | |
5221 | condition; if we find a file now and it is deleted before we | |
5222 | exec it, we lose, even if the deletion leaves a valid file | |
5223 | further down in the PATH, (2) there is no way to know exactly | |
5224 | what an executable (in the sense of "capable of being | |
5225 | exec'd") file is. Using access() loses because it may lose | |
5226 | if the caller is the superuser; failing to use it loses if | |
5227 | there are ACLs or some such. */ | |
c906108c SS |
5228 | |
5229 | char *p; | |
5230 | char *p1; | |
5231 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5232 | path is used from within GDB. */ |
c906108c SS |
5233 | char *path = getenv ("PATH"); |
5234 | int len; | |
5235 | struct stat statbuf; | |
5236 | ||
5237 | if (path == NULL) | |
5238 | path = "/bin:/usr/bin"; | |
5239 | ||
5240 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5241 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5242 | { |
5243 | p1 = strchr (p, ':'); | |
5244 | if (p1 != NULL) | |
5245 | len = p1 - p; | |
5246 | else | |
5247 | len = strlen (p); | |
5248 | strncpy (tryname, p, len); | |
5249 | tryname[len] = '\0'; | |
5250 | strcat (tryname, "/"); | |
5251 | strcat (tryname, shell_file); | |
5252 | if (access (tryname, X_OK) < 0) | |
5253 | continue; | |
5254 | if (stat (tryname, &statbuf) < 0) | |
5255 | continue; | |
5256 | if (!S_ISREG (statbuf.st_mode)) | |
5257 | /* We certainly need to reject directories. I'm not quite | |
5258 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5259 | that people want to exec() these things. */ | |
5260 | continue; | |
5261 | break; | |
5262 | } | |
5263 | if (p == NULL) | |
5264 | /* Not found. This must be an error rather than merely passing | |
5265 | the file to execlp(), because execlp() would try all the | |
5266 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 5267 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 5268 | __LINE__, shell_file); |
c906108c SS |
5269 | |
5270 | shell_file = tryname; | |
5271 | } | |
5272 | ||
28439f5e PA |
5273 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5274 | NULL, NULL, shell_file); | |
5275 | ||
5276 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
5277 | } |
5278 | ||
5279 | /* An observer for the "inferior_created" event. */ | |
c906108c | 5280 | |
27087a3d JB |
5281 | static void |
5282 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
5283 | { | |
9185ddce JB |
5284 | #ifdef SYS_syssgi |
5285 | /* Make sure to cancel the syssgi() syscall-exit notifications. | |
5286 | They should normally have been removed by now, but they may still | |
5287 | be activated if the inferior doesn't use shared libraries, or if | |
5288 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
5289 | See procfs_init_inferior() for more details. |
5290 | ||
5291 | Since these notifications are only ever enabled when we spawned | |
5292 | the inferior ourselves, there is nothing to do when the inferior | |
5293 | was created by attaching to an already running process, or when | |
5294 | debugging a core file. */ | |
5295 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
5296 | return; | |
5297 | ||
9185ddce JB |
5298 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
5299 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
5300 | #endif | |
c906108c SS |
5301 | } |
5302 | ||
c3f6f71d JM |
5303 | /* |
5304 | * Function: notice_thread | |
5305 | * | |
5306 | * Callback for find_new_threads. | |
5307 | * Calls "add_thread". | |
5308 | */ | |
c906108c | 5309 | |
c3f6f71d | 5310 | static int |
fba45db2 | 5311 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5312 | { |
39f77062 | 5313 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5314 | |
2689673f | 5315 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 5316 | add_thread (gdb_threadid); |
c906108c | 5317 | |
c3f6f71d JM |
5318 | return 0; |
5319 | } | |
5320 | ||
5321 | /* | |
5322 | * Function: target_find_new_threads | |
5323 | * | |
19958708 | 5324 | * Query all the threads that the target knows about, |
c3f6f71d JM |
5325 | * and give them back to GDB to add to its list. |
5326 | */ | |
5327 | ||
5328 | void | |
28439f5e | 5329 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
5330 | { |
5331 | procinfo *pi; | |
5332 | ||
5333 | /* Find procinfo for main process */ | |
39f77062 | 5334 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5335 | proc_update_threads (pi); |
5336 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5337 | } |
5338 | ||
19958708 | 5339 | /* |
c3f6f71d JM |
5340 | * Function: target_thread_alive |
5341 | * | |
5342 | * Return true if the thread is still 'alive'. | |
5343 | * | |
5344 | * This guy doesn't really seem to be doing his job. | |
5345 | * Got to investigate how to tell when a thread is really gone. | |
5346 | */ | |
c906108c | 5347 | |
c906108c | 5348 | static int |
28439f5e | 5349 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 5350 | { |
c3f6f71d JM |
5351 | int proc, thread; |
5352 | procinfo *pi; | |
c906108c | 5353 | |
39f77062 KB |
5354 | proc = PIDGET (ptid); |
5355 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5356 | /* If I don't know it, it ain't alive! */ |
5357 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5358 | return 0; | |
5359 | ||
5360 | /* If I can't get its status, it ain't alive! | |
5361 | What's more, I need to forget about it! */ | |
5362 | if (!proc_get_status (pi)) | |
5363 | { | |
5364 | destroy_procinfo (pi); | |
5365 | return 0; | |
5366 | } | |
5367 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5368 | return 1; | |
c906108c | 5369 | } |
c3f6f71d | 5370 | |
5240ceac | 5371 | /* Convert PTID to a string. Returns the string in a static buffer. */ |
c3f6f71d JM |
5372 | |
5373 | char * | |
117de6a9 | 5374 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5375 | { |
5376 | static char buf[80]; | |
c3f6f71d | 5377 | |
5240ceac MK |
5378 | if (TIDGET (ptid) == 0) |
5379 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5380 | else |
21749010 | 5381 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5382 | |
5383 | return buf; | |
c3f6f71d JM |
5384 | } |
5385 | ||
5386 | /* | |
5387 | * Function: procfs_set_watchpoint | |
5388 | * Insert a watchpoint | |
5389 | */ | |
5390 | ||
19958708 | 5391 | int |
39f77062 KB |
5392 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5393 | int after) | |
c906108c | 5394 | { |
c3f6f71d | 5395 | #ifndef UNIXWARE |
37de36c6 | 5396 | #ifndef AIX5 |
c3f6f71d | 5397 | int pflags = 0; |
19958708 | 5398 | procinfo *pi; |
c3f6f71d | 5399 | |
19958708 | 5400 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5401 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5402 | |
5403 | /* Translate from GDB's flags to /proc's */ | |
5404 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5405 | { |
c3f6f71d JM |
5406 | switch (rwflag) { /* FIXME: need an enum! */ |
5407 | case hw_write: /* default watchpoint (write) */ | |
5408 | pflags = WRITE_WATCHFLAG; | |
5409 | break; | |
5410 | case hw_read: /* read watchpoint */ | |
5411 | pflags = READ_WATCHFLAG; | |
5412 | break; | |
5413 | case hw_access: /* access watchpoint */ | |
5414 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5415 | break; | |
5416 | case hw_execute: /* execution HW breakpoint */ | |
5417 | pflags = EXEC_WATCHFLAG; | |
5418 | break; | |
5419 | default: /* Something weird. Return error. */ | |
c906108c | 5420 | return -1; |
c3f6f71d JM |
5421 | } |
5422 | if (after) /* Stop after r/w access is completed. */ | |
5423 | pflags |= AFTER_WATCHFLAG; | |
5424 | } | |
5425 | ||
5426 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5427 | { | |
5428 | if (errno == E2BIG) /* Typical error for no resources */ | |
5429 | return -1; /* fail */ | |
5430 | /* GDB may try to remove the same watchpoint twice. | |
5431 | If a remove request returns no match, don't error. */ | |
c906108c | 5432 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5433 | return 0; /* ignore */ |
5434 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5435 | } |
37de36c6 KB |
5436 | #endif /* AIX5 */ |
5437 | #endif /* UNIXWARE */ | |
c906108c SS |
5438 | return 0; |
5439 | } | |
5440 | ||
1e03ad20 KB |
5441 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5442 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5443 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5444 | far. | |
19958708 | 5445 | |
1e03ad20 KB |
5446 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5447 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5448 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5449 | |
5450 | static int | |
5451 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5452 | { | |
1e03ad20 KB |
5453 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5454 | and target pointers must be of the same size. If they are not, | |
5455 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5456 | fact that proc_set_watchpoint() calls |
5457 | procfs_address_to_host_pointer(); a close inspection of | |
5458 | procfs_address_to_host_pointer will reveal that an internal error | |
5459 | will be generated when the host and target pointer sizes are | |
5460 | different. */ | |
4e906f53 UW |
5461 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
5462 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) | |
1e03ad20 KB |
5463 | return 0; |
5464 | ||
5465 | /* Other tests here??? */ | |
5466 | ||
5467 | return 1; | |
1e03ad20 KB |
5468 | } |
5469 | ||
c3f6f71d JM |
5470 | /* |
5471 | * Function: stopped_by_watchpoint | |
5472 | * | |
5473 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5474 | * else returns zero. | |
5475 | */ | |
5476 | ||
25513619 PA |
5477 | static int |
5478 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5479 | { |
c3f6f71d | 5480 | procinfo *pi; |
c906108c | 5481 | |
25513619 | 5482 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa MS |
5483 | |
5484 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5485 | return 0; | |
5486 | ||
c3f6f71d | 5487 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5488 | { |
c3f6f71d | 5489 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5490 | { |
c906108c | 5491 | #ifdef FLTWATCH |
c3f6f71d JM |
5492 | if (proc_what (pi) == FLTWATCH) |
5493 | return 1; | |
c906108c SS |
5494 | #endif |
5495 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5496 | if (proc_what (pi) == FLTKWATCH) |
5497 | return 1; | |
c906108c | 5498 | #endif |
c3f6f71d | 5499 | } |
c906108c SS |
5500 | } |
5501 | return 0; | |
5502 | } | |
c906108c | 5503 | |
25513619 PA |
5504 | static int |
5505 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type) | |
5506 | { | |
d92524f1 | 5507 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5508 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5509 | { |
5510 | /* When a hardware watchpoint fires off the PC will be left at | |
5511 | the instruction following the one which caused the | |
5512 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5513 | the watchpoint. */ | |
5514 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5515 | } | |
5516 | else | |
5517 | { | |
5518 | /* When a hardware watchpoint fires off the PC will be left at | |
5519 | the instruction which caused the watchpoint. It will be | |
5520 | necessary for GDB to step over the watchpoint. */ | |
5521 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5522 | } | |
5523 | } | |
5524 | ||
5525 | static int | |
5526 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type) | |
5527 | { | |
5528 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5529 | } | |
5530 | ||
5531 | static int | |
5532 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5533 | { | |
5534 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5535 | system can support "thousands" of hardware watchpoints, but gives | |
5536 | no method for finding out how many; It doesn't say anything about | |
5537 | the allowed size for the watched area either. So we just tell | |
5538 | GDB 'yes'. */ | |
5539 | return 1; | |
5540 | } | |
5541 | ||
5542 | void | |
5543 | procfs_use_watchpoints (struct target_ops *t) | |
5544 | { | |
5545 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5546 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5547 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5548 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5549 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
25513619 PA |
5550 | } |
5551 | ||
831e682e MS |
5552 | /* |
5553 | * Memory Mappings Functions: | |
5554 | */ | |
5555 | ||
19958708 | 5556 | /* |
831e682e MS |
5557 | * Function: iterate_over_mappings |
5558 | * | |
5559 | * Call a callback function once for each mapping, passing it the mapping, | |
5560 | * an optional secondary callback function, and some optional opaque data. | |
5561 | * Quit and return the first non-zero value returned from the callback. | |
5562 | * | |
5563 | * Arguments: | |
5564 | * pi -- procinfo struct for the process to be mapped. | |
5565 | * func -- callback function to be called by this iterator. | |
5566 | * data -- optional opaque data to be passed to the callback function. | |
5567 | * child_func -- optional secondary function pointer to be passed | |
5568 | * to the child function. | |
5569 | * | |
19958708 | 5570 | * Return: First non-zero return value from the callback function, |
831e682e MS |
5571 | * or zero. |
5572 | */ | |
5573 | ||
5574 | static int | |
19958708 RM |
5575 | iterate_over_mappings (procinfo *pi, int (*child_func) (), void *data, |
5576 | int (*func) (struct prmap *map, | |
5577 | int (*child_func) (), | |
831e682e MS |
5578 | void *data)) |
5579 | { | |
5580 | char pathname[MAX_PROC_NAME_SIZE]; | |
5581 | struct prmap *prmaps; | |
5582 | struct prmap *prmap; | |
5583 | int funcstat; | |
5584 | int map_fd; | |
5585 | int nmap; | |
5586 | #ifdef NEW_PROC_API | |
5587 | struct stat sbuf; | |
5588 | #endif | |
5589 | ||
19958708 | 5590 | /* Get the number of mappings, allocate space, |
831e682e MS |
5591 | and read the mappings into prmaps. */ |
5592 | #ifdef NEW_PROC_API | |
5593 | /* Open map fd. */ | |
5594 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5595 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5596 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5597 | ||
5598 | /* Make sure it gets closed again. */ | |
5599 | make_cleanup_close (map_fd); | |
5600 | ||
19958708 | 5601 | /* Use stat to determine the file size, and compute |
831e682e MS |
5602 | the number of prmap_t objects it contains. */ |
5603 | if (fstat (map_fd, &sbuf) != 0) | |
5604 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5605 | ||
5606 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5607 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5608 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5609 | != (nmap * sizeof (*prmaps))) | |
5610 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5611 | #else | |
5612 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5613 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5614 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5615 | ||
5616 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5617 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5618 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5619 | #endif | |
5620 | ||
5621 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5622 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5623 | return funcstat; | |
5624 | ||
5625 | return 0; | |
5626 | } | |
5627 | ||
5628 | /* | |
5629 | * Function: solib_mappings_callback | |
5630 | * | |
19958708 RM |
5631 | * Calls the supplied callback function once for each mapped address |
5632 | * space in the process. The callback function receives an open | |
5633 | * file descriptor for the file corresponding to that mapped | |
5634 | * address space (if there is one), and the base address of the | |
831e682e MS |
5635 | * mapped space. Quit when the callback function returns a |
5636 | * nonzero value, or at teh end of the mappings. | |
5637 | * | |
5638 | * Returns: the first non-zero return value of the callback function, | |
5639 | * or zero. | |
5640 | */ | |
5641 | ||
19958708 | 5642 | int solib_mappings_callback (struct prmap *map, |
831e682e MS |
5643 | int (*func) (int, CORE_ADDR), |
5644 | void *data) | |
5645 | { | |
5646 | procinfo *pi = data; | |
5647 | int fd; | |
5648 | ||
5649 | #ifdef NEW_PROC_API | |
5650 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
5651 | ||
5652 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
5653 | return -1; /* sanity */ | |
5654 | ||
5655 | if (map->pr_mapname[0] == 0) | |
5656 | { | |
5657 | fd = -1; /* no map file */ | |
5658 | } | |
5659 | else | |
5660 | { | |
5661 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
5662 | /* Note: caller's responsibility to close this fd! */ | |
5663 | fd = open_with_retry (name, O_RDONLY); | |
5664 | /* Note: we don't test the above call for failure; | |
19958708 | 5665 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5666 | no file, so the open may return failure, but that's |
5667 | not a problem. */ | |
5668 | } | |
5669 | #else | |
5670 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
5671 | /* Note: we don't test the above call for failure; | |
19958708 | 5672 | we just pass the FD on as given. Sometimes there is |
831e682e MS |
5673 | no file, so the ioctl may return failure, but that's |
5674 | not a problem. */ | |
5675 | #endif | |
bf75638e | 5676 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); |
831e682e MS |
5677 | } |
5678 | ||
be4d1333 MS |
5679 | /* |
5680 | * Function: find_memory_regions_callback | |
5681 | * | |
5682 | * Implements the to_find_memory_regions method. | |
5683 | * Calls an external function for each memory region. | |
5684 | * External function will have the signiture: | |
5685 | * | |
19958708 RM |
5686 | * int callback (CORE_ADDR vaddr, |
5687 | * unsigned long size, | |
5688 | * int read, int write, int execute, | |
be4d1333 MS |
5689 | * void *data); |
5690 | * | |
5691 | * Returns the integer value returned by the callback. | |
5692 | */ | |
5693 | ||
5694 | static int | |
19958708 RM |
5695 | find_memory_regions_callback (struct prmap *map, |
5696 | int (*func) (CORE_ADDR, | |
5697 | unsigned long, | |
5698 | int, int, int, | |
be4d1333 MS |
5699 | void *), |
5700 | void *data) | |
5701 | { | |
bf75638e | 5702 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5703 | map->pr_size, |
be4d1333 MS |
5704 | (map->pr_mflags & MA_READ) != 0, |
5705 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5706 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5707 | data); |
5708 | } | |
5709 | ||
5710 | /* | |
5711 | * Function: proc_find_memory_regions | |
5712 | * | |
5713 | * External interface. Calls a callback function once for each | |
5714 | * mapped memory region in the child process, passing as arguments | |
5715 | * CORE_ADDR virtual_address, | |
19958708 | 5716 | * unsigned long size, |
be4d1333 MS |
5717 | * int read, TRUE if region is readable by the child |
5718 | * int write, TRUE if region is writable by the child | |
5719 | * int execute TRUE if region is executable by the child. | |
19958708 | 5720 | * |
be4d1333 MS |
5721 | * Stops iterating and returns the first non-zero value |
5722 | * returned by the callback. | |
5723 | */ | |
5724 | ||
5725 | static int | |
19958708 RM |
5726 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5727 | unsigned long, | |
5728 | int, int, int, | |
5729 | void *), | |
be4d1333 MS |
5730 | void *data) |
5731 | { | |
5732 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5733 | ||
19958708 | 5734 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5735 | find_memory_regions_callback); |
5736 | } | |
5737 | ||
388faa48 MS |
5738 | /* |
5739 | * Function: mappingflags | |
5740 | * | |
5741 | * Returns an ascii representation of a memory mapping's flags. | |
5742 | */ | |
c3f6f71d | 5743 | |
388faa48 | 5744 | static char * |
5ae5f592 | 5745 | mappingflags (long flags) |
388faa48 MS |
5746 | { |
5747 | static char asciiflags[8]; | |
5748 | ||
5749 | strcpy (asciiflags, "-------"); | |
5750 | #if defined (MA_PHYS) | |
5751 | if (flags & MA_PHYS) | |
5752 | asciiflags[0] = 'd'; | |
5753 | #endif | |
5754 | if (flags & MA_STACK) | |
5755 | asciiflags[1] = 's'; | |
5756 | if (flags & MA_BREAK) | |
5757 | asciiflags[2] = 'b'; | |
5758 | if (flags & MA_SHARED) | |
5759 | asciiflags[3] = 's'; | |
5760 | if (flags & MA_READ) | |
5761 | asciiflags[4] = 'r'; | |
5762 | if (flags & MA_WRITE) | |
5763 | asciiflags[5] = 'w'; | |
5764 | if (flags & MA_EXEC) | |
5765 | asciiflags[6] = 'x'; | |
5766 | return (asciiflags); | |
5767 | } | |
5768 | ||
831e682e MS |
5769 | /* |
5770 | * Function: info_mappings_callback | |
5771 | * | |
5772 | * Callback function, does the actual work for 'info proc mappings'. | |
5773 | */ | |
5774 | ||
831e682e MS |
5775 | static int |
5776 | info_mappings_callback (struct prmap *map, int (*ignore) (), void *unused) | |
5777 | { | |
0b62613e | 5778 | unsigned int pr_off; |
831e682e | 5779 | |
831e682e | 5780 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5781 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5782 | #else |
0b62613e | 5783 | pr_off = map->pr_off; |
831e682e | 5784 | #endif |
0b62613e | 5785 | |
a97b0ac8 | 5786 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5787 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5788 | (unsigned long) map->pr_vaddr, |
5789 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5790 | (unsigned long) map->pr_size, |
0b62613e PA |
5791 | pr_off, |
5792 | mappingflags (map->pr_mflags)); | |
5793 | else | |
f6a96b83 | 5794 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5795 | (unsigned long) map->pr_vaddr, |
5796 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5797 | (unsigned long) map->pr_size, |
0b62613e PA |
5798 | pr_off, |
5799 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5800 | |
5801 | return 0; | |
5802 | } | |
5803 | ||
388faa48 MS |
5804 | /* |
5805 | * Function: info_proc_mappings | |
5806 | * | |
5807 | * Implement the "info proc mappings" subcommand. | |
5808 | */ | |
5809 | ||
5810 | static void | |
5811 | info_proc_mappings (procinfo *pi, int summary) | |
5812 | { | |
388faa48 MS |
5813 | if (summary) |
5814 | return; /* No output for summary mode. */ | |
5815 | ||
a3f17187 | 5816 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5817 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5818 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5819 | "Start Addr", | |
5820 | " End Addr", | |
5821 | " Size", | |
5822 | " Offset", | |
5823 | "Flags"); | |
5824 | else | |
5825 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5826 | "Start Addr", | |
5827 | " End Addr", | |
5828 | " Size", | |
5829 | " Offset", | |
5830 | "Flags"); | |
388faa48 | 5831 | |
831e682e | 5832 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5833 | printf_filtered ("\n"); |
5834 | } | |
5835 | ||
5836 | /* | |
5837 | * Function: info_proc_cmd | |
5838 | * | |
5839 | * Implement the "info proc" command. | |
5840 | */ | |
c3f6f71d JM |
5841 | |
5842 | static void | |
fba45db2 | 5843 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5844 | { |
c3f6f71d | 5845 | struct cleanup *old_chain; |
388faa48 MS |
5846 | procinfo *process = NULL; |
5847 | procinfo *thread = NULL; | |
5848 | char **argv = NULL; | |
5849 | char *tmp = NULL; | |
5850 | int pid = 0; | |
5851 | int tid = 0; | |
5852 | int mappings = 0; | |
c906108c | 5853 | |
c3f6f71d JM |
5854 | old_chain = make_cleanup (null_cleanup, 0); |
5855 | if (args) | |
0fda6bd2 | 5856 | { |
d1a41061 PP |
5857 | argv = gdb_buildargv (args); |
5858 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5859 | } |
c3f6f71d JM |
5860 | while (argv != NULL && *argv != NULL) |
5861 | { | |
5862 | if (isdigit (argv[0][0])) | |
5863 | { | |
5864 | pid = strtoul (argv[0], &tmp, 10); | |
5865 | if (*tmp == '/') | |
5866 | tid = strtoul (++tmp, NULL, 10); | |
5867 | } | |
5868 | else if (argv[0][0] == '/') | |
5869 | { | |
5870 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5871 | } | |
388faa48 MS |
5872 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5873 | { | |
5874 | mappings = 1; | |
5875 | } | |
c3f6f71d JM |
5876 | else |
5877 | { | |
5878 | /* [...] */ | |
5879 | } | |
5880 | argv++; | |
5881 | } | |
5882 | if (pid == 0) | |
39f77062 | 5883 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5884 | if (pid == 0) |
8a3fe4f8 | 5885 | error (_("No current process: you must name one.")); |
c3f6f71d | 5886 | else |
c906108c | 5887 | { |
c3f6f71d JM |
5888 | /* Have pid, will travel. |
5889 | First see if it's a process we're already debugging. */ | |
5890 | process = find_procinfo (pid, 0); | |
5891 | if (process == NULL) | |
5892 | { | |
19958708 | 5893 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5894 | remember to close it again when finished. */ |
5895 | process = create_procinfo (pid, 0); | |
004527cb | 5896 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5897 | if (!open_procinfo_files (process, FD_CTL)) |
5898 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5899 | } | |
c906108c | 5900 | } |
c3f6f71d JM |
5901 | if (tid != 0) |
5902 | thread = create_procinfo (pid, tid); | |
5903 | ||
5904 | if (process) | |
5905 | { | |
a3f17187 | 5906 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5907 | proc_prettyprint_flags (proc_flags (process), 1); |
5908 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5909 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5910 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5911 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5912 | proc_get_nthreads (process)); |
5913 | } | |
5914 | if (thread) | |
5915 | { | |
a3f17187 | 5916 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5917 | proc_prettyprint_flags (proc_flags (thread), 1); |
5918 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5919 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5920 | } | |
5921 | ||
388faa48 MS |
5922 | if (mappings) |
5923 | { | |
5924 | info_proc_mappings (process, 0); | |
5925 | } | |
5926 | ||
c3f6f71d | 5927 | do_cleanups (old_chain); |
c906108c SS |
5928 | } |
5929 | ||
9185ddce JB |
5930 | /* Modify the status of the system call identified by SYSCALLNUM in |
5931 | the set of syscalls that are currently traced/debugged. | |
5932 | ||
5933 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5934 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5935 | ||
5936 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5937 | will be disabled. */ | |
5938 | ||
5939 | static void | |
5940 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
5941 | int mode, int from_tty) | |
5942 | { | |
5943 | sysset_t *sysset; | |
5944 | ||
5945 | if (entry_or_exit == PR_SYSENTRY) | |
5946 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5947 | else | |
5948 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5949 | ||
5950 | if (sysset == NULL) | |
5951 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5952 | ||
5953 | if (mode == FLAG_SET) | |
5954 | gdb_praddsysset (sysset, syscallnum); | |
5955 | else | |
5956 | gdb_prdelsysset (sysset, syscallnum); | |
5957 | ||
5958 | if (entry_or_exit == PR_SYSENTRY) | |
5959 | { | |
5960 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5961 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5962 | } | |
5963 | else | |
5964 | { | |
5965 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5966 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5967 | } | |
5968 | } | |
5969 | ||
c3f6f71d | 5970 | static void |
fba45db2 | 5971 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5972 | { |
c3f6f71d | 5973 | procinfo *pi; |
c906108c | 5974 | |
39f77062 | 5975 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5976 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5977 | |
c3f6f71d | 5978 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5979 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5980 | |
39f77062 | 5981 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5982 | if (isdigit (args[0])) |
5983 | { | |
9185ddce | 5984 | const int syscallnum = atoi (args); |
c906108c | 5985 | |
9185ddce | 5986 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5987 | } |
5988 | } | |
5989 | ||
19958708 | 5990 | static void |
fba45db2 | 5991 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5992 | { |
c3f6f71d JM |
5993 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5994 | } | |
c906108c | 5995 | |
19958708 | 5996 | static void |
fba45db2 | 5997 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5998 | { |
5999 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 6000 | } |
c906108c | 6001 | |
19958708 | 6002 | static void |
fba45db2 | 6003 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
6004 | { |
6005 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
6006 | } | |
6007 | ||
19958708 | 6008 | static void |
fba45db2 | 6009 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 6010 | { |
c3f6f71d JM |
6011 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
6012 | } | |
c906108c | 6013 | |
c906108c | 6014 | |
c906108c | 6015 | void |
fba45db2 | 6016 | _initialize_procfs (void) |
c906108c | 6017 | { |
27087a3d JB |
6018 | observer_attach_inferior_created (procfs_inferior_created); |
6019 | ||
1bedd215 AC |
6020 | add_info ("proc", info_proc_cmd, _("\ |
6021 | Show /proc process information about any running process.\n\ | |
388faa48 | 6022 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 6023 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 6024 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 6025 | _("Give a trace of entries into the syscall.")); |
19958708 | 6026 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 6027 | _("Give a trace of exits from the syscall.")); |
19958708 | 6028 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 6029 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 6030 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 6031 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
6032 | } |
6033 | ||
6034 | /* =================== END, GDB "MODULE" =================== */ | |
6035 | ||
6036 | ||
6037 | ||
65554fef | 6038 | /* miscellaneous stubs: */ |
c3f6f71d JM |
6039 | /* The following satisfy a few random symbols mostly created by */ |
6040 | /* the solaris threads implementation, which I will chase down */ | |
6041 | /* later. */ | |
6042 | ||
6043 | /* | |
6044 | * Return a pid for which we guarantee | |
6045 | * we will be able to find a 'live' procinfo. | |
6046 | */ | |
6047 | ||
39f77062 | 6048 | ptid_t |
fba45db2 | 6049 | procfs_first_available (void) |
c3f6f71d | 6050 | { |
39f77062 | 6051 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 6052 | } |
be4d1333 | 6053 | |
2020b7ab PA |
6054 | static int |
6055 | find_signalled_thread (struct thread_info *info, void *data) | |
6056 | { | |
6057 | if (info->stop_signal != TARGET_SIGNAL_0 | |
6058 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
6059 | return 1; | |
6060 | ||
6061 | return 0; | |
6062 | } | |
6063 | ||
6064 | static enum target_signal | |
6065 | find_stop_signal (void) | |
6066 | { | |
6067 | struct thread_info *info = | |
6068 | iterate_over_threads (find_signalled_thread, NULL); | |
6069 | ||
6070 | if (info) | |
6071 | return info->stop_signal; | |
6072 | else | |
6073 | return TARGET_SIGNAL_0; | |
6074 | } | |
6075 | ||
be4d1333 | 6076 | /* =================== GCORE .NOTE "MODULE" =================== */ |
65554fef MS |
6077 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
6078 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
6079 | |
6080 | static char * | |
19958708 | 6081 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
6082 | char *note_data, int *note_size, |
6083 | enum target_signal stop_signal) | |
be4d1333 | 6084 | { |
594f7785 | 6085 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
6086 | gdb_gregset_t gregs; |
6087 | gdb_fpregset_t fpregs; | |
6088 | unsigned long merged_pid; | |
75125405 | 6089 | struct cleanup *old_chain; |
be4d1333 MS |
6090 | |
6091 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
6092 | ||
75125405 DJ |
6093 | /* This part is the old method for fetching registers. |
6094 | It should be replaced by the newer one using regsets | |
6095 | once it is implemented in this platform: | |
6096 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ | |
6097 | ||
6098 | old_chain = save_inferior_ptid (); | |
6099 | inferior_ptid = ptid; | |
6100 | target_fetch_registers (regcache, -1); | |
6101 | ||
594f7785 | 6102 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 6103 | #if defined (NEW_PROC_API) |
65554fef MS |
6104 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
6105 | note_data, | |
6106 | note_size, | |
19958708 | 6107 | merged_pid, |
65554fef MS |
6108 | stop_signal, |
6109 | &gregs); | |
6110 | #else | |
be4d1333 | 6111 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
6112 | note_data, |
6113 | note_size, | |
19958708 | 6114 | merged_pid, |
be4d1333 | 6115 | stop_signal, |
65554fef MS |
6116 | &gregs); |
6117 | #endif | |
594f7785 | 6118 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
6119 | note_data = (char *) elfcore_write_prfpreg (obfd, |
6120 | note_data, | |
6121 | note_size, | |
6122 | &fpregs, | |
6123 | sizeof (fpregs)); | |
75125405 DJ |
6124 | |
6125 | do_cleanups (old_chain); | |
6126 | ||
be4d1333 MS |
6127 | return note_data; |
6128 | } | |
6129 | ||
6130 | struct procfs_corefile_thread_data { | |
6131 | bfd *obfd; | |
6132 | char *note_data; | |
6133 | int *note_size; | |
2020b7ab | 6134 | enum target_signal stop_signal; |
be4d1333 MS |
6135 | }; |
6136 | ||
6137 | static int | |
65554fef | 6138 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
6139 | { |
6140 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 6141 | |
2689673f | 6142 | if (pi != NULL) |
be4d1333 | 6143 | { |
75125405 DJ |
6144 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
6145 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, | |
19958708 | 6146 | args->note_data, |
2020b7ab PA |
6147 | args->note_size, |
6148 | args->stop_signal); | |
be4d1333 MS |
6149 | } |
6150 | return 0; | |
6151 | } | |
6152 | ||
6153 | static char * | |
6154 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6155 | { | |
6156 | struct cleanup *old_chain; | |
6157 | gdb_gregset_t gregs; | |
6158 | gdb_fpregset_t fpregs; | |
6159 | char fname[16] = {'\0'}; | |
6160 | char psargs[80] = {'\0'}; | |
6161 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
6162 | char *note_data = NULL; | |
6dbdc4a3 | 6163 | char *inf_args; |
be4d1333 | 6164 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 6165 | gdb_byte *auxv; |
4e73f23d | 6166 | int auxv_len; |
651c8d2d | 6167 | enum target_signal stop_signal; |
be4d1333 MS |
6168 | |
6169 | if (get_exec_file (0)) | |
6170 | { | |
6171 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 6172 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 6173 | sizeof (psargs)); |
6dbdc4a3 MS |
6174 | |
6175 | inf_args = get_inferior_args (); | |
6176 | if (inf_args && *inf_args && | |
6177 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 6178 | { |
19958708 | 6179 | strncat (psargs, " ", |
be4d1333 | 6180 | sizeof (psargs) - strlen (psargs)); |
19958708 | 6181 | strncat (psargs, inf_args, |
be4d1333 MS |
6182 | sizeof (psargs) - strlen (psargs)); |
6183 | } | |
6184 | } | |
6185 | ||
19958708 RM |
6186 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
6187 | note_data, | |
6188 | note_size, | |
6189 | fname, | |
be4d1333 MS |
6190 | psargs); |
6191 | ||
651c8d2d PA |
6192 | stop_signal = find_stop_signal (); |
6193 | ||
8903eff6 | 6194 | #ifdef UNIXWARE |
594f7785 | 6195 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
6196 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
6197 | PIDGET (inferior_ptid), | |
65554fef MS |
6198 | stop_signal, &gregs); |
6199 | #endif | |
6200 | ||
be4d1333 MS |
6201 | thread_args.obfd = obfd; |
6202 | thread_args.note_data = note_data; | |
6203 | thread_args.note_size = note_size; | |
651c8d2d | 6204 | thread_args.stop_signal = stop_signal; |
65554fef MS |
6205 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
6206 | ||
2689673f PA |
6207 | /* There should be always at least one thread. */ |
6208 | gdb_assert (thread_args.note_data != note_data); | |
6209 | note_data = thread_args.note_data; | |
be4d1333 | 6210 | |
13547ab6 DJ |
6211 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
6212 | NULL, &auxv); | |
4e73f23d RM |
6213 | if (auxv_len > 0) |
6214 | { | |
6215 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
6216 | "CORE", NT_AUXV, auxv, auxv_len); | |
6217 | xfree (auxv); | |
6218 | } | |
6219 | ||
be4d1333 MS |
6220 | make_cleanup (xfree, note_data); |
6221 | return note_data; | |
6222 | } | |
65554fef MS |
6223 | #else /* !(Solaris or Unixware) */ |
6224 | static char * | |
6225 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6226 | { | |
8a3fe4f8 | 6227 | error (_("gcore not implemented for this host.")); |
65554fef MS |
6228 | return NULL; /* lint */ |
6229 | } | |
6230 | #endif /* Solaris or Unixware */ | |
be4d1333 | 6231 | /* =================== END GCORE .NOTE "MODULE" =================== */ |