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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 | |
e9ef4f39 JB |
448 | /* A function type used as a callback back iterate_over_mappings. */ |
449 | typedef int (iterate_over_mappings_cb_ftype) | |
450 | (CORE_ADDR vaddr, unsigned long size, int read, int write, int execute, | |
451 | void *data); | |
452 | ||
453 | static int iterate_over_mappings | |
454 | (procinfo *pi, | |
455 | iterate_over_mappings_cb_ftype *child_func, | |
456 | void *data, | |
457 | int (*func) (struct prmap *map, | |
458 | iterate_over_mappings_cb_ftype *child_func, | |
459 | void *data)); | |
460 | ||
c3f6f71d JM |
461 | /* The head of the procinfo list: */ |
462 | static procinfo * procinfo_list; | |
c906108c | 463 | |
c3f6f71d JM |
464 | /* |
465 | * Function: find_procinfo | |
466 | * | |
467 | * Search the procinfo list. | |
468 | * | |
469 | * Returns: pointer to procinfo, or NULL if not found. | |
470 | */ | |
c906108c | 471 | |
19958708 | 472 | static procinfo * |
fba45db2 | 473 | find_procinfo (int pid, int tid) |
c5aa993b | 474 | { |
c3f6f71d | 475 | procinfo *pi; |
c906108c | 476 | |
c3f6f71d JM |
477 | for (pi = procinfo_list; pi; pi = pi->next) |
478 | if (pi->pid == pid) | |
479 | break; | |
c906108c | 480 | |
c3f6f71d JM |
481 | if (pi) |
482 | if (tid) | |
483 | { | |
484 | /* Don't check threads_valid. If we're updating the | |
485 | thread_list, we want to find whatever threads are already | |
486 | here. This means that in general it is the caller's | |
487 | responsibility to check threads_valid and update before | |
488 | calling find_procinfo, if the caller wants to find a new | |
489 | thread. */ | |
490 | ||
491 | for (pi = pi->thread_list; pi; pi = pi->next) | |
492 | if (pi->tid == tid) | |
493 | break; | |
494 | } | |
c906108c | 495 | |
c3f6f71d JM |
496 | return pi; |
497 | } | |
c906108c | 498 | |
c3f6f71d JM |
499 | /* |
500 | * Function: find_procinfo_or_die | |
501 | * | |
502 | * Calls find_procinfo, but errors on failure. | |
503 | */ | |
c906108c | 504 | |
c3f6f71d | 505 | static procinfo * |
fba45db2 | 506 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
507 | { |
508 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 509 | |
c3f6f71d | 510 | if (pi == NULL) |
0fda6bd2 JM |
511 | { |
512 | if (tid) | |
8a3fe4f8 | 513 | error (_("procfs: couldn't find pid %d (kernel thread %d) in procinfo list."), |
0fda6bd2 JM |
514 | pid, tid); |
515 | else | |
8a3fe4f8 | 516 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 517 | } |
c3f6f71d JM |
518 | return pi; |
519 | } | |
c906108c | 520 | |
4d1bcd09 KB |
521 | /* open_with_retry() is a wrapper for open(). The appropriate |
522 | open() call is attempted; if unsuccessful, it will be retried as | |
523 | many times as needed for the EAGAIN and EINTR conditions. | |
19958708 | 524 | |
4d1bcd09 KB |
525 | For other conditions, open_with_retry() will retry the open() a |
526 | limited number of times. In addition, a short sleep is imposed | |
527 | prior to retrying the open(). The reason for this sleep is to give | |
528 | the kernel a chance to catch up and create the file in question in | |
529 | the event that GDB "wins" the race to open a file before the kernel | |
530 | has created it. */ | |
19958708 | 531 | |
4d1bcd09 KB |
532 | static int |
533 | open_with_retry (const char *pathname, int flags) | |
534 | { | |
535 | int retries_remaining, status; | |
536 | ||
537 | retries_remaining = 2; | |
538 | ||
539 | while (1) | |
540 | { | |
541 | status = open (pathname, flags); | |
542 | ||
543 | if (status >= 0 || retries_remaining == 0) | |
544 | break; | |
545 | else if (errno != EINTR && errno != EAGAIN) | |
546 | { | |
547 | retries_remaining--; | |
548 | sleep (1); | |
549 | } | |
550 | } | |
551 | ||
552 | return status; | |
553 | } | |
554 | ||
c3f6f71d JM |
555 | /* |
556 | * Function: open_procinfo_files | |
557 | * | |
558 | * Open the file descriptor for the process or LWP. | |
559 | * ifdef NEW_PROC_API, we only open the control file descriptor; | |
560 | * the others are opened lazily as needed. | |
561 | * else (if not NEW_PROC_API), there is only one real | |
562 | * file descriptor, but we keep multiple copies of it so that | |
563 | * the code that uses them does not have to be #ifdef'd. | |
564 | * | |
565 | * Return: file descriptor, or zero for failure. | |
566 | */ | |
c906108c | 567 | |
c3f6f71d | 568 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 569 | |
c3f6f71d | 570 | static int |
fba45db2 | 571 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 572 | { |
0fda6bd2 | 573 | #ifdef NEW_PROC_API |
c3f6f71d | 574 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 575 | #endif |
c3f6f71d JM |
576 | int fd; |
577 | ||
19958708 | 578 | /* |
c3f6f71d JM |
579 | * This function is getting ALMOST long enough to break up into several. |
580 | * Here is some rationale: | |
581 | * | |
582 | * NEW_PROC_API (Solaris 2.6, Solaris 2.7, Unixware): | |
19958708 | 583 | * There are several file descriptors that may need to be open |
c3f6f71d JM |
584 | * for any given process or LWP. The ones we're intereted in are: |
585 | * - control (ctl) write-only change the state | |
586 | * - status (status) read-only query the state | |
587 | * - address space (as) read/write access memory | |
588 | * - map (map) read-only virtual addr map | |
589 | * Most of these are opened lazily as they are needed. | |
19958708 | 590 | * The pathnames for the 'files' for an LWP look slightly |
c3f6f71d JM |
591 | * different from those of a first-class process: |
592 | * Pathnames for a process (<proc-id>): | |
593 | * /proc/<proc-id>/ctl | |
594 | * /proc/<proc-id>/status | |
595 | * /proc/<proc-id>/as | |
596 | * /proc/<proc-id>/map | |
597 | * Pathnames for an LWP (lwp-id): | |
598 | * /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
599 | * /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
600 | * An LWP has no map or address space file descriptor, since | |
601 | * the memory map and address space are shared by all LWPs. | |
602 | * | |
603 | * Everyone else (Solaris 2.5, Irix, OSF) | |
604 | * There is only one file descriptor for each process or LWP. | |
605 | * For convenience, we copy the same file descriptor into all | |
606 | * three fields of the procinfo struct (ctl_fd, status_fd, and | |
607 | * as_fd, see NEW_PROC_API above) so that code that uses them | |
19958708 | 608 | * doesn't need any #ifdef's. |
c3f6f71d JM |
609 | * Pathname for all: |
610 | * /proc/<proc-id> | |
611 | * | |
612 | * Solaris 2.5 LWP's: | |
19958708 | 613 | * Each LWP has an independent file descriptor, but these |
c3f6f71d JM |
614 | * are not obtained via the 'open' system call like the rest: |
615 | * instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
616 | * to the file descriptor of the parent process. | |
617 | * | |
618 | * OSF threads: | |
619 | * These do not even have their own independent file descriptor. | |
620 | * All operations are carried out on the file descriptor of the | |
621 | * parent process. Therefore we just call open again for each | |
622 | * thread, getting a new handle for the same 'file'. | |
623 | */ | |
624 | ||
625 | #ifdef NEW_PROC_API | |
626 | /* | |
627 | * In this case, there are several different file descriptors that | |
628 | * we might be asked to open. The control file descriptor will be | |
629 | * opened early, but the others will be opened lazily as they are | |
630 | * needed. | |
631 | */ | |
632 | ||
633 | strcpy (tmp, pi->pathname); | |
634 | switch (which) { /* which file descriptor to open? */ | |
635 | case FD_CTL: | |
636 | if (pi->tid) | |
637 | strcat (tmp, "/lwpctl"); | |
638 | else | |
639 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 640 | fd = open_with_retry (tmp, O_WRONLY); |
c3f6f71d JM |
641 | if (fd <= 0) |
642 | return 0; /* fail */ | |
643 | pi->ctl_fd = fd; | |
644 | break; | |
645 | case FD_AS: | |
646 | if (pi->tid) | |
647 | return 0; /* there is no 'as' file descriptor for an lwp */ | |
648 | strcat (tmp, "/as"); | |
4d1bcd09 | 649 | fd = open_with_retry (tmp, O_RDWR); |
c3f6f71d JM |
650 | if (fd <= 0) |
651 | return 0; /* fail */ | |
652 | pi->as_fd = fd; | |
653 | break; | |
654 | case FD_STATUS: | |
655 | if (pi->tid) | |
656 | strcat (tmp, "/lwpstatus"); | |
657 | else | |
658 | strcat (tmp, "/status"); | |
4d1bcd09 | 659 | fd = open_with_retry (tmp, O_RDONLY); |
c3f6f71d JM |
660 | if (fd <= 0) |
661 | return 0; /* fail */ | |
662 | pi->status_fd = fd; | |
663 | break; | |
664 | default: | |
665 | return 0; /* unknown file descriptor */ | |
666 | } | |
667 | #else /* not NEW_PROC_API */ | |
668 | /* | |
669 | * In this case, there is only one file descriptor for each procinfo | |
670 | * (ie. each process or LWP). In fact, only the file descriptor for | |
671 | * the process can actually be opened by an 'open' system call. | |
19958708 RM |
672 | * The ones for the LWPs have to be obtained thru an IOCTL call |
673 | * on the process's file descriptor. | |
c3f6f71d JM |
674 | * |
675 | * For convenience, we copy each procinfo's single file descriptor | |
19958708 | 676 | * into all of the fields occupied by the several file descriptors |
c3f6f71d JM |
677 | * of the NEW_PROC_API implementation. That way, the code that uses |
678 | * them can be written without ifdefs. | |
679 | */ | |
680 | ||
681 | ||
682 | #ifdef PIOCTSTATUS /* OSF */ | |
4d1bcd09 KB |
683 | /* Only one FD; just open it. */ |
684 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) == 0) | |
c3f6f71d JM |
685 | return 0; |
686 | #else /* Sol 2.5, Irix, other? */ | |
687 | if (pi->tid == 0) /* Master procinfo for the process */ | |
688 | { | |
4d1bcd09 | 689 | fd = open_with_retry (pi->pathname, O_RDWR); |
c3f6f71d JM |
690 | if (fd <= 0) |
691 | return 0; /* fail */ | |
692 | } | |
693 | else /* LWP thread procinfo */ | |
694 | { | |
695 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
696 | procinfo *process; | |
697 | int lwpid = pi->tid; | |
698 | ||
699 | /* Find the procinfo for the entire process. */ | |
700 | if ((process = find_procinfo (pi->pid, 0)) == NULL) | |
701 | return 0; /* fail */ | |
702 | ||
703 | /* Now obtain the file descriptor for the LWP. */ | |
704 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) <= 0) | |
705 | return 0; /* fail */ | |
706 | #else /* Irix, other? */ | |
707 | return 0; /* Don't know how to open threads */ | |
708 | #endif /* Sol 2.5 PIOCOPENLWP */ | |
709 | } | |
710 | #endif /* OSF PIOCTSTATUS */ | |
711 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
712 | #endif /* NEW_PROC_API */ | |
c906108c | 713 | |
c3f6f71d JM |
714 | return 1; /* success */ |
715 | } | |
c906108c | 716 | |
c3f6f71d JM |
717 | /* |
718 | * Function: create_procinfo | |
719 | * | |
720 | * Allocate a data structure and link it into the procinfo list. | |
02d5252f | 721 | * (First tries to find a pre-existing one (FIXME: why?) |
c3f6f71d JM |
722 | * |
723 | * Return: pointer to new procinfo struct. | |
724 | */ | |
c906108c | 725 | |
c3f6f71d | 726 | static procinfo * |
fba45db2 | 727 | create_procinfo (int pid, int tid) |
c3f6f71d | 728 | { |
0b62613e | 729 | procinfo *pi, *parent = NULL; |
c906108c | 730 | |
0d06e24b | 731 | if ((pi = find_procinfo (pid, tid))) |
c3f6f71d | 732 | return pi; /* Already exists, nothing to do. */ |
c906108c | 733 | |
c3f6f71d JM |
734 | /* find parent before doing malloc, to save having to cleanup */ |
735 | if (tid != 0) | |
736 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
737 | create it if it | |
738 | doesn't exist yet? */ | |
c906108c | 739 | |
c3f6f71d JM |
740 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
741 | memset (pi, 0, sizeof (procinfo)); | |
742 | pi->pid = pid; | |
743 | pi->tid = tid; | |
c906108c | 744 | |
37de36c6 KB |
745 | #ifdef DYNAMIC_SYSCALLS |
746 | load_syscalls (pi); | |
747 | #endif | |
748 | ||
1d5e0602 KB |
749 | pi->saved_entryset = sysset_t_alloc (pi); |
750 | pi->saved_exitset = sysset_t_alloc (pi); | |
751 | ||
c3f6f71d JM |
752 | /* Chain into list. */ |
753 | if (tid == 0) | |
754 | { | |
755 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
756 | pi->next = procinfo_list; | |
757 | procinfo_list = pi; | |
758 | } | |
759 | else | |
760 | { | |
761 | #ifdef NEW_PROC_API | |
762 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
763 | #else | |
764 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
765 | #endif | |
766 | pi->next = parent->thread_list; | |
767 | parent->thread_list = pi; | |
768 | } | |
769 | return pi; | |
770 | } | |
c906108c | 771 | |
c3f6f71d JM |
772 | /* |
773 | * Function: close_procinfo_files | |
774 | * | |
775 | * Close all file descriptors associated with the procinfo | |
776 | */ | |
c906108c | 777 | |
c3f6f71d | 778 | static void |
fba45db2 | 779 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
780 | { |
781 | if (pi->ctl_fd > 0) | |
782 | close (pi->ctl_fd); | |
783 | #ifdef NEW_PROC_API | |
784 | if (pi->as_fd > 0) | |
785 | close (pi->as_fd); | |
786 | if (pi->status_fd > 0) | |
787 | close (pi->status_fd); | |
788 | #endif | |
789 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
790 | } | |
c906108c | 791 | |
c3f6f71d JM |
792 | /* |
793 | * Function: destroy_procinfo | |
794 | * | |
795 | * Destructor function. Close, unlink and deallocate the object. | |
796 | */ | |
c906108c | 797 | |
c3f6f71d | 798 | static void |
fba45db2 | 799 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
800 | { |
801 | procinfo *ptr; | |
802 | ||
803 | /* Step one: unlink the procinfo from its list */ | |
804 | if (pi == *list) | |
805 | *list = pi->next; | |
19958708 | 806 | else |
c3f6f71d JM |
807 | for (ptr = *list; ptr; ptr = ptr->next) |
808 | if (ptr->next == pi) | |
809 | { | |
810 | ptr->next = pi->next; | |
811 | break; | |
812 | } | |
7a292a7a | 813 | |
c3f6f71d JM |
814 | /* Step two: close any open file descriptors */ |
815 | close_procinfo_files (pi); | |
7a292a7a | 816 | |
c3f6f71d | 817 | /* Step three: free the memory. */ |
37de36c6 KB |
818 | #ifdef DYNAMIC_SYSCALLS |
819 | free_syscalls (pi); | |
820 | #endif | |
1d5e0602 KB |
821 | xfree (pi->saved_entryset); |
822 | xfree (pi->saved_exitset); | |
b8c9b27d | 823 | xfree (pi); |
c3f6f71d | 824 | } |
c906108c | 825 | |
c3f6f71d | 826 | static void |
fba45db2 | 827 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
828 | { |
829 | procinfo *tmp; | |
c906108c | 830 | |
c3f6f71d JM |
831 | if (pi->tid != 0) /* destroy a thread procinfo */ |
832 | { | |
833 | tmp = find_procinfo (pi->pid, 0); /* find the parent process */ | |
834 | destroy_one_procinfo (&tmp->thread_list, pi); | |
835 | } | |
836 | else /* destroy a process procinfo and all its threads */ | |
837 | { | |
838 | /* First destroy the children, if any; */ | |
839 | while (pi->thread_list != NULL) | |
840 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
841 | /* Then destroy the parent. Genocide!!! */ | |
842 | destroy_one_procinfo (&procinfo_list, pi); | |
843 | } | |
844 | } | |
c906108c | 845 | |
004527cb AC |
846 | static void |
847 | do_destroy_procinfo_cleanup (void *pi) | |
848 | { | |
849 | destroy_procinfo (pi); | |
850 | } | |
851 | ||
c3f6f71d | 852 | enum { NOKILL, KILL }; |
c906108c | 853 | |
c3f6f71d JM |
854 | /* |
855 | * Function: dead_procinfo | |
856 | * | |
857 | * To be called on a non_recoverable error for a procinfo. | |
858 | * Prints error messages, optionally sends a SIGKILL to the process, | |
859 | * then destroys the data structure. | |
860 | */ | |
c906108c | 861 | |
c3f6f71d | 862 | static void |
fba45db2 | 863 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
864 | { |
865 | char procfile[80]; | |
c906108c | 866 | |
c3f6f71d JM |
867 | if (pi->pathname) |
868 | { | |
869 | print_sys_errmsg (pi->pathname, errno); | |
870 | } | |
871 | else | |
872 | { | |
873 | sprintf (procfile, "process %d", pi->pid); | |
874 | print_sys_errmsg (procfile, errno); | |
875 | } | |
876 | if (kill_p == KILL) | |
877 | kill (pi->pid, SIGKILL); | |
c906108c | 878 | |
c3f6f71d | 879 | destroy_procinfo (pi); |
0b62613e | 880 | error ("%s", msg); |
c3f6f71d | 881 | } |
c906108c | 882 | |
37de36c6 KB |
883 | /* |
884 | * Function: sysset_t_size | |
885 | * | |
886 | * Returns the (complete) size of a sysset_t struct. Normally, this | |
887 | * is just sizeof (syset_t), but in the case of Monterey/64, the actual | |
888 | * size of sysset_t isn't known until runtime. | |
889 | */ | |
890 | ||
891 | static int | |
892 | sysset_t_size (procinfo * pi) | |
893 | { | |
894 | #ifndef DYNAMIC_SYSCALLS | |
895 | return sizeof (sysset_t); | |
896 | #else | |
897 | return sizeof (sysset_t) - sizeof (uint64_t) | |
898 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
899 | / (8 * sizeof (uint64_t))); | |
900 | #endif | |
901 | } | |
902 | ||
903 | /* Function: sysset_t_alloc | |
19958708 | 904 | |
37de36c6 KB |
905 | Allocate and (partially) initialize a sysset_t struct. */ |
906 | ||
907 | static sysset_t * | |
908 | sysset_t_alloc (procinfo * pi) | |
909 | { | |
910 | sysset_t *ret; | |
911 | int size = sysset_t_size (pi); | |
912 | ret = xmalloc (size); | |
913 | #ifdef DYNAMIC_SYSCALLS | |
914 | ret->pr_size = (pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
915 | / (8 * sizeof (uint64_t)); | |
916 | #endif | |
917 | return ret; | |
918 | } | |
919 | ||
920 | #ifdef DYNAMIC_SYSCALLS | |
921 | ||
922 | /* Function: load_syscalls | |
19958708 | 923 | |
37de36c6 KB |
924 | Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
925 | pi->num_syscalls with the number of syscalls and pi->syscall_names | |
926 | with the names. (Certain numbers may be skipped in which case the | |
927 | names for these numbers will be left as NULL.) */ | |
928 | ||
929 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
930 | #define MAX_SYSCALLS 65536 | |
931 | ||
932 | static void | |
933 | load_syscalls (procinfo *pi) | |
934 | { | |
935 | char pathname[MAX_PROC_NAME_SIZE]; | |
936 | int sysent_fd; | |
937 | prsysent_t header; | |
938 | prsyscall_t *syscalls; | |
939 | int i, size, maxcall; | |
940 | ||
941 | pi->num_syscalls = 0; | |
942 | pi->syscall_names = 0; | |
943 | ||
944 | /* Open the file descriptor for the sysent file */ | |
945 | sprintf (pathname, "/proc/%d/sysent", pi->pid); | |
4d1bcd09 | 946 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
947 | if (sysent_fd < 0) |
948 | { | |
8a3fe4f8 | 949 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
950 | } |
951 | ||
952 | size = sizeof header - sizeof (prsyscall_t); | |
953 | if (read (sysent_fd, &header, size) != size) | |
954 | { | |
8a3fe4f8 | 955 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
956 | } |
957 | ||
958 | if (header.pr_nsyscalls == 0) | |
959 | { | |
8a3fe4f8 | 960 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), pi->pid); |
37de36c6 KB |
961 | } |
962 | ||
963 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
964 | syscalls = xmalloc (size); | |
965 | ||
966 | if (read (sysent_fd, syscalls, size) != size) | |
967 | { | |
968 | xfree (syscalls); | |
8a3fe4f8 | 969 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
970 | } |
971 | ||
972 | /* Find maximum syscall number. This may not be the same as | |
973 | pr_nsyscalls since that value refers to the number of entries | |
974 | in the table. (Also, the docs indicate that some system | |
975 | call numbers may be skipped.) */ | |
976 | ||
977 | maxcall = syscalls[0].pr_number; | |
978 | ||
979 | for (i = 1; i < header.pr_nsyscalls; i++) | |
980 | if (syscalls[i].pr_number > maxcall | |
981 | && syscalls[i].pr_nameoff > 0 | |
982 | && syscalls[i].pr_number < MAX_SYSCALLS) | |
983 | maxcall = syscalls[i].pr_number; | |
984 | ||
985 | pi->num_syscalls = maxcall+1; | |
986 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
987 | ||
988 | for (i = 0; i < pi->num_syscalls; i++) | |
989 | pi->syscall_names[i] = NULL; | |
990 | ||
991 | /* Read the syscall names in */ | |
992 | for (i = 0; i < header.pr_nsyscalls; i++) | |
993 | { | |
994 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
995 | int nread; | |
996 | int callnum; | |
997 | ||
998 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
999 | || syscalls[i].pr_number < 0 | |
1000 | || syscalls[i].pr_nameoff <= 0 | |
1001 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
1002 | != (off_t) syscalls[i].pr_nameoff)) | |
1003 | continue; | |
1004 | ||
1005 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
1006 | if (nread <= 0) | |
1007 | continue; | |
1008 | ||
1009 | callnum = syscalls[i].pr_number; | |
1010 | ||
1011 | if (pi->syscall_names[callnum] != NULL) | |
1012 | { | |
1013 | /* FIXME: Generate warning */ | |
1014 | continue; | |
1015 | } | |
1016 | ||
1017 | namebuf[nread-1] = '\0'; | |
1018 | size = strlen (namebuf) + 1; | |
1019 | pi->syscall_names[callnum] = xmalloc (size); | |
1020 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
1021 | pi->syscall_names[callnum][size-1] = '\0'; | |
1022 | } | |
19958708 | 1023 | |
37de36c6 KB |
1024 | close (sysent_fd); |
1025 | xfree (syscalls); | |
1026 | } | |
1027 | ||
1028 | /* Function: free_syscalls | |
19958708 | 1029 | |
37de36c6 KB |
1030 | Free the space allocated for the syscall names from the procinfo |
1031 | structure. */ | |
1032 | ||
1033 | static void | |
1034 | free_syscalls (procinfo *pi) | |
1035 | { | |
1036 | if (pi->syscall_names) | |
1037 | { | |
1038 | int i; | |
1039 | ||
1040 | for (i = 0; i < pi->num_syscalls; i++) | |
1041 | if (pi->syscall_names[i] != NULL) | |
1042 | xfree (pi->syscall_names[i]); | |
1043 | ||
1044 | xfree (pi->syscall_names); | |
1045 | pi->syscall_names = 0; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | /* Function: find_syscall | |
1050 | ||
1051 | Given a name, look up (and return) the corresponding syscall number. | |
1052 | If no match is found, return -1. */ | |
19958708 | 1053 | |
37de36c6 KB |
1054 | static int |
1055 | find_syscall (procinfo *pi, char *name) | |
1056 | { | |
1057 | int i; | |
1058 | for (i = 0; i < pi->num_syscalls; i++) | |
1059 | { | |
1060 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
1061 | return i; | |
1062 | } | |
1063 | return -1; | |
1064 | } | |
1065 | #endif | |
1066 | ||
c3f6f71d | 1067 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1068 | |
c3f6f71d | 1069 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1070 | |
c3f6f71d JM |
1071 | /* |
1072 | * This "module" is the interface layer between the /proc system API | |
19958708 | 1073 | * and the gdb target vector functions. This layer consists of |
c3f6f71d JM |
1074 | * access functions that encapsulate each of the basic operations |
1075 | * that we need to use from the /proc API. | |
1076 | * | |
1077 | * The main motivation for this layer is to hide the fact that | |
1078 | * there are two very different implementations of the /proc API. | |
1079 | * Rather than have a bunch of #ifdefs all thru the gdb target vector | |
1080 | * functions, we do our best to hide them all in here. | |
1081 | */ | |
c906108c | 1082 | |
a14ed312 KB |
1083 | int proc_get_status (procinfo * pi); |
1084 | long proc_flags (procinfo * pi); | |
1085 | int proc_why (procinfo * pi); | |
1086 | int proc_what (procinfo * pi); | |
1087 | int proc_set_run_on_last_close (procinfo * pi); | |
1088 | int proc_unset_run_on_last_close (procinfo * pi); | |
1089 | int proc_set_inherit_on_fork (procinfo * pi); | |
1090 | int proc_unset_inherit_on_fork (procinfo * pi); | |
1091 | int proc_set_async (procinfo * pi); | |
1092 | int proc_unset_async (procinfo * pi); | |
1093 | int proc_stop_process (procinfo * pi); | |
1094 | int proc_trace_signal (procinfo * pi, int signo); | |
1095 | int proc_ignore_signal (procinfo * pi, int signo); | |
1096 | int proc_clear_current_fault (procinfo * pi); | |
1097 | int proc_set_current_signal (procinfo * pi, int signo); | |
1098 | int proc_clear_current_signal (procinfo * pi); | |
1099 | int proc_set_gregs (procinfo * pi); | |
1100 | int proc_set_fpregs (procinfo * pi); | |
1101 | int proc_wait_for_stop (procinfo * pi); | |
1102 | int proc_run_process (procinfo * pi, int step, int signo); | |
1103 | int proc_kill (procinfo * pi, int signo); | |
1104 | int proc_parent_pid (procinfo * pi); | |
1105 | int proc_get_nthreads (procinfo * pi); | |
1106 | int proc_get_current_thread (procinfo * pi); | |
37de36c6 | 1107 | int proc_set_held_signals (procinfo * pi, gdb_sigset_t * sighold); |
a14ed312 KB |
1108 | int proc_set_traced_sysexit (procinfo * pi, sysset_t * sysset); |
1109 | int proc_set_traced_sysentry (procinfo * pi, sysset_t * sysset); | |
1110 | int proc_set_traced_faults (procinfo * pi, fltset_t * fltset); | |
37de36c6 | 1111 | int proc_set_traced_signals (procinfo * pi, gdb_sigset_t * sigset); |
a14ed312 KB |
1112 | |
1113 | int proc_update_threads (procinfo * pi); | |
1114 | int proc_iterate_over_threads (procinfo * pi, | |
8ab86381 KB |
1115 | int (*func) (procinfo *, procinfo *, void *), |
1116 | void *ptr); | |
a14ed312 KB |
1117 | |
1118 | gdb_gregset_t *proc_get_gregs (procinfo * pi); | |
1119 | gdb_fpregset_t *proc_get_fpregs (procinfo * pi); | |
1120 | sysset_t *proc_get_traced_sysexit (procinfo * pi, sysset_t * save); | |
1121 | sysset_t *proc_get_traced_sysentry (procinfo * pi, sysset_t * save); | |
1122 | fltset_t *proc_get_traced_faults (procinfo * pi, fltset_t * save); | |
37de36c6 KB |
1123 | gdb_sigset_t *proc_get_traced_signals (procinfo * pi, gdb_sigset_t * save); |
1124 | gdb_sigset_t *proc_get_held_signals (procinfo * pi, gdb_sigset_t * save); | |
1125 | gdb_sigset_t *proc_get_pending_signals (procinfo * pi, gdb_sigset_t * save); | |
1126 | gdb_sigaction_t *proc_get_signal_actions (procinfo * pi, gdb_sigaction_t *save); | |
a14ed312 KB |
1127 | |
1128 | void proc_warn (procinfo * pi, char *func, int line); | |
1129 | void proc_error (procinfo * pi, char *func, int line); | |
c906108c | 1130 | |
c3f6f71d | 1131 | void |
fba45db2 | 1132 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1133 | { |
1134 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1135 | print_sys_errmsg (errmsg, errno); | |
1136 | } | |
c906108c | 1137 | |
c3f6f71d | 1138 | void |
fba45db2 | 1139 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1140 | { |
1141 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1142 | perror_with_name (errmsg); | |
1143 | } | |
c906108c | 1144 | |
c3f6f71d JM |
1145 | /* |
1146 | * Function: proc_get_status | |
1147 | * | |
1148 | * Updates the status struct in the procinfo. | |
1149 | * There is a 'valid' flag, to let other functions know when | |
1150 | * this function needs to be called (so the status is only | |
1151 | * read when it is needed). The status file descriptor is | |
1152 | * also only opened when it is needed. | |
1153 | * | |
1154 | * Return: non-zero for success, zero for failure. | |
1155 | */ | |
c906108c | 1156 | |
c3f6f71d | 1157 | int |
fba45db2 | 1158 | proc_get_status (procinfo *pi) |
c3f6f71d JM |
1159 | { |
1160 | /* Status file descriptor is opened "lazily" */ | |
1161 | if (pi->status_fd == 0 && | |
1162 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1163 | { | |
1164 | pi->status_valid = 0; | |
1165 | return 0; | |
1166 | } | |
c906108c | 1167 | |
c3f6f71d JM |
1168 | #ifdef NEW_PROC_API |
1169 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1170 | pi->status_valid = 0; /* fail */ | |
1171 | else | |
1172 | { | |
19958708 | 1173 | /* Sigh... I have to read a different data structure, |
c3f6f71d JM |
1174 | depending on whether this is a main process or an LWP. */ |
1175 | if (pi->tid) | |
19958708 RM |
1176 | pi->status_valid = (read (pi->status_fd, |
1177 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1178 | sizeof (lwpstatus_t)) |
1179 | == sizeof (lwpstatus_t)); | |
1180 | else | |
1181 | { | |
19958708 | 1182 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1183 | (char *) &pi->prstatus, |
1184 | sizeof (gdb_prstatus_t)) | |
1185 | == sizeof (gdb_prstatus_t)); | |
1186 | #if 0 /*def UNIXWARE*/ | |
1187 | if (pi->status_valid && | |
1188 | (pi->prstatus.pr_lwp.pr_flags & PR_ISTOP) && | |
1189 | pi->prstatus.pr_lwp.pr_why == PR_REQUESTED) | |
1190 | /* Unixware peculiarity -- read the damn thing again! */ | |
19958708 | 1191 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1192 | (char *) &pi->prstatus, |
1193 | sizeof (gdb_prstatus_t)) | |
1194 | == sizeof (gdb_prstatus_t)); | |
1195 | #endif /* UNIXWARE */ | |
1196 | } | |
1197 | } | |
1198 | #else /* ioctl method */ | |
1199 | #ifdef PIOCTSTATUS /* osf */ | |
1200 | if (pi->tid == 0) /* main process */ | |
1201 | { | |
1202 | /* Just read the danged status. Now isn't that simple? */ | |
19958708 | 1203 | pi->status_valid = |
c3f6f71d JM |
1204 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1205 | } | |
1206 | else | |
1207 | { | |
1208 | int win; | |
1209 | struct { | |
1210 | long pr_count; | |
1211 | tid_t pr_error_thread; | |
1212 | struct prstatus status; | |
1213 | } thread_status; | |
1214 | ||
1215 | thread_status.pr_count = 1; | |
1216 | thread_status.status.pr_tid = pi->tid; | |
1217 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1218 | if (win) | |
1219 | { | |
19958708 | 1220 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1221 | sizeof (pi->prstatus)); |
1222 | pi->status_valid = 1; | |
1223 | } | |
1224 | } | |
1225 | #else | |
1226 | /* Just read the danged status. Now isn't that simple? */ | |
1227 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); | |
1228 | #endif | |
1229 | #endif | |
c906108c | 1230 | |
c3f6f71d JM |
1231 | if (pi->status_valid) |
1232 | { | |
19958708 | 1233 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1234 | proc_why (pi), |
19958708 | 1235 | proc_what (pi), |
c3f6f71d JM |
1236 | proc_get_current_thread (pi)); |
1237 | } | |
c906108c | 1238 | |
c3f6f71d JM |
1239 | /* The status struct includes general regs, so mark them valid too */ |
1240 | pi->gregs_valid = pi->status_valid; | |
1241 | #ifdef NEW_PROC_API | |
19958708 | 1242 | /* In the read/write multiple-fd model, |
c3f6f71d JM |
1243 | the status struct includes the fp regs too, so mark them valid too */ |
1244 | pi->fpregs_valid = pi->status_valid; | |
1245 | #endif | |
1246 | return pi->status_valid; /* True if success, false if failure. */ | |
1247 | } | |
c906108c | 1248 | |
c3f6f71d JM |
1249 | /* |
1250 | * Function: proc_flags | |
1251 | * | |
1252 | * returns the process flags (pr_flags field). | |
19958708 | 1253 | */ |
c3f6f71d JM |
1254 | |
1255 | long | |
fba45db2 | 1256 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1257 | { |
1258 | if (!pi->status_valid) | |
1259 | if (!proc_get_status (pi)) | |
1260 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1261 | |
c3f6f71d | 1262 | #ifdef NEW_PROC_API |
0d06e24b JM |
1263 | # ifdef UNIXWARE |
1264 | /* UnixWare 7.1 puts process status flags, e.g. PR_ASYNC, in | |
1265 | pstatus_t and LWP status flags, e.g. PR_STOPPED, in lwpstatus_t. | |
1266 | The two sets of flags don't overlap. */ | |
1267 | return pi->prstatus.pr_flags | pi->prstatus.pr_lwp.pr_flags; | |
1268 | # else | |
c3f6f71d | 1269 | return pi->prstatus.pr_lwp.pr_flags; |
0d06e24b | 1270 | # endif |
c3f6f71d JM |
1271 | #else |
1272 | return pi->prstatus.pr_flags; | |
1273 | #endif | |
1274 | } | |
c906108c | 1275 | |
c3f6f71d JM |
1276 | /* |
1277 | * Function: proc_why | |
1278 | * | |
1279 | * returns the pr_why field (why the process stopped). | |
1280 | */ | |
c906108c | 1281 | |
c3f6f71d | 1282 | int |
fba45db2 | 1283 | proc_why (procinfo *pi) |
c3f6f71d JM |
1284 | { |
1285 | if (!pi->status_valid) | |
1286 | if (!proc_get_status (pi)) | |
1287 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1288 | |
c3f6f71d JM |
1289 | #ifdef NEW_PROC_API |
1290 | return pi->prstatus.pr_lwp.pr_why; | |
1291 | #else | |
1292 | return pi->prstatus.pr_why; | |
1293 | #endif | |
1294 | } | |
c906108c | 1295 | |
c3f6f71d JM |
1296 | /* |
1297 | * Function: proc_what | |
1298 | * | |
1299 | * returns the pr_what field (details of why the process stopped). | |
1300 | */ | |
c906108c | 1301 | |
c3f6f71d | 1302 | int |
fba45db2 | 1303 | proc_what (procinfo *pi) |
c3f6f71d JM |
1304 | { |
1305 | if (!pi->status_valid) | |
1306 | if (!proc_get_status (pi)) | |
1307 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1308 | |
c3f6f71d JM |
1309 | #ifdef NEW_PROC_API |
1310 | return pi->prstatus.pr_lwp.pr_what; | |
1311 | #else | |
1312 | return pi->prstatus.pr_what; | |
c906108c | 1313 | #endif |
c3f6f71d | 1314 | } |
c906108c | 1315 | |
c3f6f71d JM |
1316 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
1317 | /* | |
1318 | * Function: proc_nsysarg | |
1319 | * | |
1320 | * returns the pr_nsysarg field (number of args to the current syscall). | |
1321 | */ | |
1322 | ||
1323 | int | |
fba45db2 | 1324 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1325 | { |
1326 | if (!pi->status_valid) | |
1327 | if (!proc_get_status (pi)) | |
1328 | return 0; | |
19958708 | 1329 | |
c3f6f71d JM |
1330 | #ifdef NEW_PROC_API |
1331 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1332 | #else | |
1333 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1334 | #endif |
c3f6f71d | 1335 | } |
c906108c | 1336 | |
c3f6f71d JM |
1337 | /* |
1338 | * Function: proc_sysargs | |
1339 | * | |
1340 | * returns the pr_sysarg field (pointer to the arguments of current syscall). | |
1341 | */ | |
c906108c | 1342 | |
c3f6f71d | 1343 | long * |
fba45db2 | 1344 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1345 | { |
1346 | if (!pi->status_valid) | |
1347 | if (!proc_get_status (pi)) | |
1348 | return NULL; | |
19958708 | 1349 | |
c3f6f71d JM |
1350 | #ifdef NEW_PROC_API |
1351 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1352 | #else | |
1353 | return (long *) &pi->prstatus.pr_sysarg; | |
1354 | #endif | |
1355 | } | |
c906108c | 1356 | |
c3f6f71d JM |
1357 | /* |
1358 | * Function: proc_syscall | |
1359 | * | |
1360 | * returns the pr_syscall field (id of current syscall if we are in one). | |
1361 | */ | |
c906108c | 1362 | |
c3f6f71d | 1363 | int |
fba45db2 | 1364 | proc_syscall (procinfo *pi) |
c3f6f71d JM |
1365 | { |
1366 | if (!pi->status_valid) | |
1367 | if (!proc_get_status (pi)) | |
1368 | return 0; | |
19958708 | 1369 | |
c3f6f71d JM |
1370 | #ifdef NEW_PROC_API |
1371 | return pi->prstatus.pr_lwp.pr_syscall; | |
1372 | #else | |
1373 | return pi->prstatus.pr_syscall; | |
1374 | #endif | |
1375 | } | |
1376 | #endif /* PIOCSSPCACT */ | |
c906108c | 1377 | |
c3f6f71d JM |
1378 | /* |
1379 | * Function: proc_cursig: | |
1380 | * | |
1381 | * returns the pr_cursig field (current signal). | |
1382 | */ | |
c906108c | 1383 | |
c3f6f71d JM |
1384 | long |
1385 | proc_cursig (struct procinfo *pi) | |
1386 | { | |
1387 | if (!pi->status_valid) | |
1388 | if (!proc_get_status (pi)) | |
1389 | return 0; /* FIXME: not a good failure value (but what is?) */ | |
c906108c | 1390 | |
c3f6f71d JM |
1391 | #ifdef NEW_PROC_API |
1392 | return pi->prstatus.pr_lwp.pr_cursig; | |
1393 | #else | |
1394 | return pi->prstatus.pr_cursig; | |
1395 | #endif | |
1396 | } | |
c906108c | 1397 | |
c3f6f71d | 1398 | /* |
19958708 | 1399 | * Function: proc_modify_flag |
c3f6f71d | 1400 | * |
19958708 | 1401 | * === I appologize for the messiness of this function. |
c3f6f71d JM |
1402 | * === This is an area where the different versions of |
1403 | * === /proc are more inconsistent than usual. MVS | |
1404 | * | |
1405 | * Set or reset any of the following process flags: | |
1406 | * PR_FORK -- forked child will inherit trace flags | |
1407 | * PR_RLC -- traced process runs when last /proc file closed. | |
0d06e24b | 1408 | * PR_KLC -- traced process is killed when last /proc file closed. |
c3f6f71d JM |
1409 | * PR_ASYNC -- LWP's get to run/stop independently. |
1410 | * | |
1411 | * There are three methods for doing this function: | |
1412 | * 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1413 | * [Sol6, Sol7, UW] | |
1414 | * 2) Middle: PIOCSET/PIOCRESET | |
1415 | * [Irix, Sol5] | |
1416 | * 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1417 | * [OSF, Sol5] | |
1418 | * | |
1419 | * Note: Irix does not define PR_ASYNC. | |
0d06e24b JM |
1420 | * Note: OSF does not define PR_KLC. |
1421 | * Note: OSF is the only one that can ONLY use the oldest method. | |
c3f6f71d | 1422 | * |
19958708 | 1423 | * Arguments: |
c3f6f71d JM |
1424 | * pi -- the procinfo |
1425 | * flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1426 | * mode -- 1 for set, 0 for reset. | |
1427 | * | |
1428 | * Returns non-zero for success, zero for failure. | |
1429 | */ | |
c906108c | 1430 | |
c3f6f71d | 1431 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1432 | |
c3f6f71d | 1433 | static int |
fba45db2 | 1434 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1435 | { |
1436 | long win = 0; /* default to fail */ | |
1437 | ||
19958708 RM |
1438 | /* |
1439 | * These operations affect the process as a whole, and applying | |
1440 | * them to an individual LWP has the same meaning as applying them | |
1441 | * to the main process. Therefore, if we're ever called with a | |
1442 | * pointer to an LWP's procinfo, let's substitute the process's | |
1443 | * procinfo and avoid opening the LWP's file descriptor | |
1444 | * unnecessarily. | |
c3f6f71d JM |
1445 | */ |
1446 | ||
1447 | if (pi->pid != 0) | |
1448 | pi = find_procinfo_or_die (pi->pid, 0); | |
1449 | ||
1450 | #ifdef NEW_PROC_API /* Newest method: UnixWare and newer Solarii */ | |
19958708 | 1451 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1452 | (which for no obvious reason has a different definition |
1453 | from one operating system to the next...) */ | |
1454 | #ifdef PCUNSET | |
1455 | #define GDBRESET PCUNSET | |
37de36c6 | 1456 | #else |
c3f6f71d JM |
1457 | #ifdef PCRESET |
1458 | #define GDBRESET PCRESET | |
37de36c6 | 1459 | #endif |
c906108c | 1460 | #endif |
c3f6f71d | 1461 | { |
37de36c6 | 1462 | procfs_ctl_t arg[2]; |
c906108c | 1463 | |
c3f6f71d JM |
1464 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC) */ |
1465 | arg[0] = PCSET; | |
1466 | else /* Reset the flag */ | |
1467 | arg[0] = GDBRESET; | |
c5aa993b | 1468 | |
c3f6f71d JM |
1469 | arg[1] = flag; |
1470 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1471 | } | |
1472 | #else | |
1473 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
1474 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC) */ | |
1475 | { | |
1476 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1477 | } | |
1478 | else /* Reset the flag */ | |
1479 | { | |
1480 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1481 | } | |
c906108c | 1482 | |
c3f6f71d JM |
1483 | #else |
1484 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1485 | switch (flag) { | |
1486 | case PR_RLC: | |
1487 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1488 | { | |
1489 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1490 | } | |
1491 | else /* Clear run-on-last-close */ | |
1492 | { | |
1493 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1494 | } | |
1495 | break; | |
1496 | case PR_FORK: | |
1497 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1498 | { | |
1499 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1500 | } | |
1501 | else /* Clear inherit-on-fork */ | |
1502 | { | |
1503 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1504 | } | |
1505 | break; | |
1506 | default: | |
1507 | win = 0; /* fail -- unknown flag (can't do PR_ASYNC) */ | |
1508 | break; | |
1509 | } | |
1510 | #endif | |
1511 | #endif | |
1512 | #endif | |
1513 | #undef GDBRESET | |
1514 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1515 | pi->status_valid = 0; | |
c906108c | 1516 | |
c3f6f71d | 1517 | if (!win) |
8a3fe4f8 | 1518 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1519 | flag == PR_FORK ? "PR_FORK" : |
1520 | flag == PR_RLC ? "PR_RLC" : | |
1521 | #ifdef PR_ASYNC | |
1522 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1523 | #endif |
1524 | #ifdef PR_KLC | |
1525 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1526 | #endif |
1527 | "<unknown flag>", | |
1528 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1529 | |
c3f6f71d JM |
1530 | return win; |
1531 | } | |
c906108c | 1532 | |
c3f6f71d JM |
1533 | /* |
1534 | * Function: proc_set_run_on_last_close | |
1535 | * | |
1536 | * Set the run_on_last_close flag. | |
1537 | * Process with all threads will become runnable | |
1538 | * when debugger closes all /proc fds. | |
1539 | * | |
1540 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1541 | */ |
1542 | ||
c3f6f71d | 1543 | int |
fba45db2 | 1544 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1545 | { |
c3f6f71d JM |
1546 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1547 | } | |
c906108c | 1548 | |
c3f6f71d JM |
1549 | /* |
1550 | * Function: proc_unset_run_on_last_close | |
1551 | * | |
1552 | * Reset the run_on_last_close flag. | |
1553 | * Process will NOT become runnable | |
1554 | * when debugger closes its file handles. | |
1555 | * | |
1556 | * Returns non-zero for success, zero for failure. | |
1557 | */ | |
c906108c | 1558 | |
c3f6f71d | 1559 | int |
fba45db2 | 1560 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1561 | { |
1562 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1563 | } |
1564 | ||
0d06e24b JM |
1565 | #ifdef PR_KLC |
1566 | /* | |
1567 | * Function: proc_set_kill_on_last_close | |
1568 | * | |
1569 | * Set the kill_on_last_close flag. | |
1570 | * Process with all threads will be killed when debugger | |
1571 | * closes all /proc fds (or debugger exits or dies). | |
1572 | * | |
1573 | * Returns non-zero for success, zero for failure. | |
1574 | */ | |
1575 | ||
1576 | int | |
fba45db2 | 1577 | proc_set_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1578 | { |
1579 | return proc_modify_flag (pi, PR_KLC, FLAG_SET); | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Function: proc_unset_kill_on_last_close | |
1584 | * | |
1585 | * Reset the kill_on_last_close flag. | |
19958708 | 1586 | * Process will NOT be killed when debugger |
0d06e24b JM |
1587 | * closes its file handles (or exits or dies). |
1588 | * | |
1589 | * Returns non-zero for success, zero for failure. | |
1590 | */ | |
1591 | ||
1592 | int | |
fba45db2 | 1593 | proc_unset_kill_on_last_close (procinfo *pi) |
0d06e24b JM |
1594 | { |
1595 | return proc_modify_flag (pi, PR_KLC, FLAG_RESET); | |
1596 | } | |
1597 | #endif /* PR_KLC */ | |
1598 | ||
c906108c | 1599 | /* |
c3f6f71d JM |
1600 | * Function: proc_set_inherit_on_fork |
1601 | * | |
1602 | * Set inherit_on_fork flag. | |
1603 | * If the process forks a child while we are registered for events | |
1604 | * in the parent, then we will also recieve events from the child. | |
1605 | * | |
1606 | * Returns non-zero for success, zero for failure. | |
1607 | */ | |
c906108c | 1608 | |
c3f6f71d | 1609 | int |
fba45db2 | 1610 | proc_set_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1611 | { |
1612 | return proc_modify_flag (pi, PR_FORK, FLAG_SET); | |
1613 | } | |
c5aa993b | 1614 | |
c3f6f71d JM |
1615 | /* |
1616 | * Function: proc_unset_inherit_on_fork | |
1617 | * | |
1618 | * Reset inherit_on_fork flag. | |
1619 | * If the process forks a child while we are registered for events | |
1620 | * in the parent, then we will NOT recieve events from the child. | |
1621 | * | |
1622 | * Returns non-zero for success, zero for failure. | |
1623 | */ | |
c906108c | 1624 | |
c3f6f71d | 1625 | int |
fba45db2 | 1626 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1627 | { |
1628 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1629 | } | |
c906108c | 1630 | |
c3f6f71d JM |
1631 | #ifdef PR_ASYNC |
1632 | /* | |
1633 | * Function: proc_set_async | |
1634 | * | |
1635 | * Set PR_ASYNC flag. | |
19958708 | 1636 | * If one LWP stops because of a debug event (signal etc.), |
c3f6f71d JM |
1637 | * the remaining LWPs will continue to run. |
1638 | * | |
1639 | * Returns non-zero for success, zero for failure. | |
1640 | */ | |
c906108c | 1641 | |
c3f6f71d | 1642 | int |
fba45db2 | 1643 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1644 | { |
1645 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1646 | } | |
c906108c | 1647 | |
c3f6f71d JM |
1648 | /* |
1649 | * Function: proc_unset_async | |
1650 | * | |
1651 | * Reset PR_ASYNC flag. | |
1652 | * If one LWP stops because of a debug event (signal etc.), | |
1653 | * then all other LWPs will stop as well. | |
1654 | * | |
1655 | * Returns non-zero for success, zero for failure. | |
c906108c SS |
1656 | */ |
1657 | ||
c3f6f71d | 1658 | int |
fba45db2 | 1659 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1660 | { |
1661 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1662 | } | |
1663 | #endif /* PR_ASYNC */ | |
c906108c SS |
1664 | |
1665 | /* | |
c3f6f71d JM |
1666 | * Function: proc_stop_process |
1667 | * | |
1668 | * Request the process/LWP to stop. Does not wait. | |
19958708 | 1669 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1670 | */ |
c906108c | 1671 | |
c3f6f71d | 1672 | int |
fba45db2 | 1673 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1674 | { |
1675 | int win; | |
c906108c | 1676 | |
c3f6f71d JM |
1677 | /* |
1678 | * We might conceivably apply this operation to an LWP, and | |
1679 | * the LWP's ctl file descriptor might not be open. | |
1680 | */ | |
c906108c | 1681 | |
c3f6f71d JM |
1682 | if (pi->ctl_fd == 0 && |
1683 | open_procinfo_files (pi, FD_CTL) == 0) | |
1684 | return 0; | |
1685 | else | |
1686 | { | |
1687 | #ifdef NEW_PROC_API | |
37de36c6 | 1688 | procfs_ctl_t cmd = PCSTOP; |
c3f6f71d JM |
1689 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1690 | #else /* ioctl method */ | |
1691 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1692 | /* Note: the call also reads the prstatus. */ | |
1693 | if (win) | |
1694 | { | |
1695 | pi->status_valid = 1; | |
19958708 | 1696 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1697 | proc_why (pi), |
19958708 | 1698 | proc_what (pi), |
c3f6f71d JM |
1699 | proc_get_current_thread (pi)); |
1700 | } | |
1701 | #endif | |
1702 | } | |
c906108c | 1703 | |
c3f6f71d JM |
1704 | return win; |
1705 | } | |
c5aa993b | 1706 | |
c3f6f71d JM |
1707 | /* |
1708 | * Function: proc_wait_for_stop | |
1709 | * | |
1710 | * Wait for the process or LWP to stop (block until it does). | |
19958708 | 1711 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1712 | */ |
1713 | ||
c3f6f71d | 1714 | int |
fba45db2 | 1715 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1716 | { |
c3f6f71d JM |
1717 | int win; |
1718 | ||
1719 | /* | |
1720 | * We should never have to apply this operation to any procinfo | |
1721 | * except the one for the main process. If that ever changes | |
19958708 | 1722 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1723 | * replace it with one that makes sure the ctl_fd is open. |
1724 | */ | |
19958708 | 1725 | |
c3f6f71d JM |
1726 | if (pi->tid != 0) |
1727 | pi = find_procinfo_or_die (pi->pid, 0); | |
1728 | ||
1729 | #ifdef NEW_PROC_API | |
1730 | { | |
37de36c6 | 1731 | procfs_ctl_t cmd = PCWSTOP; |
c3f6f71d JM |
1732 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1733 | /* We been runnin' and we stopped -- need to update status. */ | |
1734 | pi->status_valid = 0; | |
1735 | } | |
1736 | #else /* ioctl method */ | |
1737 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1738 | /* Above call also refreshes the prstatus. */ | |
1739 | if (win) | |
1740 | { | |
1741 | pi->status_valid = 1; | |
19958708 | 1742 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1743 | proc_why (pi), |
19958708 | 1744 | proc_what (pi), |
c3f6f71d JM |
1745 | proc_get_current_thread (pi)); |
1746 | } | |
c906108c SS |
1747 | #endif |
1748 | ||
c3f6f71d | 1749 | return win; |
c906108c SS |
1750 | } |
1751 | ||
1752 | /* | |
c3f6f71d JM |
1753 | * Function: proc_run_process |
1754 | * | |
1755 | * Make the process or LWP runnable. | |
1756 | * Options (not all are implemented): | |
1757 | * - single-step | |
1758 | * - clear current fault | |
1759 | * - clear current signal | |
1760 | * - abort the current system call | |
1761 | * - stop as soon as finished with system call | |
1762 | * - (ioctl): set traced signal set | |
1763 | * - (ioctl): set held signal set | |
1764 | * - (ioctl): set traced fault set | |
1765 | * - (ioctl): set start pc (vaddr) | |
1766 | * Always clear the current fault. | |
1767 | * Clear the current signal if 'signo' is zero. | |
1768 | * | |
1769 | * Arguments: | |
1770 | * pi the process or LWP to operate on. | |
1771 | * step if true, set the process or LWP to trap after one instr. | |
1772 | * signo if zero, clear the current signal if any. | |
1773 | * if non-zero, set the current signal to this one. | |
1774 | * | |
19958708 | 1775 | * Returns non-zero for success, zero for failure. |
c3f6f71d JM |
1776 | */ |
1777 | ||
1778 | int | |
fba45db2 | 1779 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1780 | { |
1781 | int win; | |
1782 | int runflags; | |
1783 | ||
1784 | /* | |
1785 | * We will probably have to apply this operation to individual threads, | |
1786 | * so make sure the control file descriptor is open. | |
1787 | */ | |
19958708 | 1788 | |
c3f6f71d JM |
1789 | if (pi->ctl_fd == 0 && |
1790 | open_procinfo_files (pi, FD_CTL) == 0) | |
1791 | { | |
1792 | return 0; | |
1793 | } | |
c906108c | 1794 | |
c3f6f71d JM |
1795 | runflags = PRCFAULT; /* always clear current fault */ |
1796 | if (step) | |
1797 | runflags |= PRSTEP; | |
1798 | if (signo == 0) | |
1799 | runflags |= PRCSIG; | |
1800 | else if (signo != -1) /* -1 means do nothing W.R.T. signals */ | |
1801 | proc_set_current_signal (pi, signo); | |
c5aa993b | 1802 | |
c3f6f71d JM |
1803 | #ifdef NEW_PROC_API |
1804 | { | |
37de36c6 | 1805 | procfs_ctl_t cmd[2]; |
c906108c | 1806 | |
c3f6f71d JM |
1807 | cmd[0] = PCRUN; |
1808 | cmd[1] = runflags; | |
1809 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1810 | } | |
1811 | #else /* ioctl method */ | |
1812 | { | |
1813 | prrun_t prrun; | |
c906108c | 1814 | |
c3f6f71d JM |
1815 | memset (&prrun, 0, sizeof (prrun)); |
1816 | prrun.pr_flags = runflags; | |
1817 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1818 | } | |
1819 | #endif | |
c906108c | 1820 | |
c3f6f71d JM |
1821 | return win; |
1822 | } | |
c906108c | 1823 | |
c3f6f71d JM |
1824 | /* |
1825 | * Function: proc_set_traced_signals | |
1826 | * | |
1827 | * Register to trace signals in the process or LWP. | |
19958708 | 1828 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1829 | */ |
1830 | ||
c3f6f71d | 1831 | int |
37de36c6 | 1832 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1833 | { |
c3f6f71d JM |
1834 | int win; |
1835 | ||
1836 | /* | |
1837 | * We should never have to apply this operation to any procinfo | |
1838 | * except the one for the main process. If that ever changes | |
19958708 | 1839 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1840 | * replace it with one that makes sure the ctl_fd is open. |
1841 | */ | |
19958708 | 1842 | |
c3f6f71d JM |
1843 | if (pi->tid != 0) |
1844 | pi = find_procinfo_or_die (pi->pid, 0); | |
1845 | ||
1846 | #ifdef NEW_PROC_API | |
1847 | { | |
1848 | struct { | |
37de36c6 | 1849 | procfs_ctl_t cmd; |
c3f6f71d | 1850 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1851 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1852 | } arg; |
c906108c | 1853 | |
c3f6f71d | 1854 | arg.cmd = PCSTRACE; |
37de36c6 | 1855 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1856 | |
c3f6f71d JM |
1857 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1858 | } | |
1859 | #else /* ioctl method */ | |
1860 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1861 | #endif | |
1862 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1863 | pi->status_valid = 0; | |
c906108c | 1864 | |
c3f6f71d | 1865 | if (!win) |
8a3fe4f8 | 1866 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1867 | return win; |
c906108c SS |
1868 | } |
1869 | ||
1870 | /* | |
c3f6f71d JM |
1871 | * Function: proc_set_traced_faults |
1872 | * | |
1873 | * Register to trace hardware faults in the process or LWP. | |
19958708 | 1874 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1875 | */ |
c906108c | 1876 | |
c3f6f71d | 1877 | int |
fba45db2 | 1878 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1879 | { |
1880 | int win; | |
1881 | ||
1882 | /* | |
1883 | * We should never have to apply this operation to any procinfo | |
1884 | * except the one for the main process. If that ever changes | |
19958708 | 1885 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1886 | * replace it with one that makes sure the ctl_fd is open. |
1887 | */ | |
19958708 | 1888 | |
c3f6f71d JM |
1889 | if (pi->tid != 0) |
1890 | pi = find_procinfo_or_die (pi->pid, 0); | |
1891 | ||
1892 | #ifdef NEW_PROC_API | |
1893 | { | |
1894 | struct { | |
37de36c6 | 1895 | procfs_ctl_t cmd; |
c3f6f71d JM |
1896 | /* Use char array to avoid alignment issues. */ |
1897 | char fltset[sizeof (fltset_t)]; | |
1898 | } arg; | |
c906108c | 1899 | |
c3f6f71d JM |
1900 | arg.cmd = PCSFAULT; |
1901 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1902 | |
c3f6f71d JM |
1903 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1904 | } | |
1905 | #else /* ioctl method */ | |
1906 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1907 | #endif | |
1908 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1909 | pi->status_valid = 0; | |
c906108c | 1910 | |
c3f6f71d JM |
1911 | return win; |
1912 | } | |
c5aa993b | 1913 | |
c3f6f71d JM |
1914 | /* |
1915 | * Function: proc_set_traced_sysentry | |
1916 | * | |
1917 | * Register to trace entry to system calls in the process or LWP. | |
19958708 | 1918 | * Returns non-zero for success, zero for failure. |
c906108c SS |
1919 | */ |
1920 | ||
c3f6f71d | 1921 | int |
fba45db2 | 1922 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1923 | { |
c3f6f71d JM |
1924 | int win; |
1925 | ||
1926 | /* | |
1927 | * We should never have to apply this operation to any procinfo | |
1928 | * except the one for the main process. If that ever changes | |
19958708 | 1929 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1930 | * replace it with one that makes sure the ctl_fd is open. |
1931 | */ | |
19958708 | 1932 | |
c3f6f71d JM |
1933 | if (pi->tid != 0) |
1934 | pi = find_procinfo_or_die (pi->pid, 0); | |
1935 | ||
1936 | #ifdef NEW_PROC_API | |
1937 | { | |
37de36c6 KB |
1938 | struct gdb_proc_ctl_pcsentry { |
1939 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1940 | /* Use char array to avoid alignment issues. */ |
1941 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1942 | } *argp; |
1943 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
1944 | - sizeof (sysset_t) | |
1945 | + sysset_t_size (pi); | |
c3f6f71d | 1946 | |
37de36c6 | 1947 | argp = xmalloc (argp_size); |
c3f6f71d | 1948 | |
37de36c6 KB |
1949 | argp->cmd = PCSENTRY; |
1950 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1951 | ||
1952 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1953 | xfree (argp); | |
c3f6f71d JM |
1954 | } |
1955 | #else /* ioctl method */ | |
1956 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1957 | #endif | |
1958 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
1959 | pi->status_valid = 0; | |
19958708 | 1960 | |
c3f6f71d | 1961 | return win; |
c906108c SS |
1962 | } |
1963 | ||
1964 | /* | |
c3f6f71d JM |
1965 | * Function: proc_set_traced_sysexit |
1966 | * | |
1967 | * Register to trace exit from system calls in the process or LWP. | |
19958708 | 1968 | * Returns non-zero for success, zero for failure. |
c3f6f71d | 1969 | */ |
c906108c | 1970 | |
c3f6f71d | 1971 | int |
fba45db2 | 1972 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1973 | { |
1974 | int win; | |
1975 | ||
1976 | /* | |
1977 | * We should never have to apply this operation to any procinfo | |
1978 | * except the one for the main process. If that ever changes | |
19958708 | 1979 | * for any reason, then take out the following clause and |
c3f6f71d JM |
1980 | * replace it with one that makes sure the ctl_fd is open. |
1981 | */ | |
19958708 | 1982 | |
c3f6f71d JM |
1983 | if (pi->tid != 0) |
1984 | pi = find_procinfo_or_die (pi->pid, 0); | |
1985 | ||
1986 | #ifdef NEW_PROC_API | |
1987 | { | |
37de36c6 KB |
1988 | struct gdb_proc_ctl_pcsexit { |
1989 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1990 | /* Use char array to avoid alignment issues. */ |
1991 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1992 | } *argp; |
1993 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
1994 | - sizeof (sysset_t) | |
1995 | + sysset_t_size (pi); | |
c906108c | 1996 | |
37de36c6 | 1997 | argp = xmalloc (argp_size); |
c906108c | 1998 | |
37de36c6 KB |
1999 | argp->cmd = PCSEXIT; |
2000 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
2001 | ||
2002 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
2003 | xfree (argp); | |
c3f6f71d JM |
2004 | } |
2005 | #else /* ioctl method */ | |
2006 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
2007 | #endif | |
2008 | /* The above operation renders the procinfo's cached pstatus obsolete. */ | |
2009 | pi->status_valid = 0; | |
c906108c | 2010 | |
c3f6f71d JM |
2011 | return win; |
2012 | } | |
c906108c | 2013 | |
c3f6f71d JM |
2014 | /* |
2015 | * Function: proc_set_held_signals | |
2016 | * | |
2017 | * Specify the set of blocked / held signals in the process or LWP. | |
19958708 | 2018 | * Returns non-zero for success, zero for failure. |
c906108c SS |
2019 | */ |
2020 | ||
c3f6f71d | 2021 | int |
37de36c6 | 2022 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 2023 | { |
c3f6f71d JM |
2024 | int win; |
2025 | ||
2026 | /* | |
2027 | * We should never have to apply this operation to any procinfo | |
2028 | * except the one for the main process. If that ever changes | |
19958708 | 2029 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2030 | * replace it with one that makes sure the ctl_fd is open. |
2031 | */ | |
19958708 | 2032 | |
c3f6f71d JM |
2033 | if (pi->tid != 0) |
2034 | pi = find_procinfo_or_die (pi->pid, 0); | |
2035 | ||
2036 | #ifdef NEW_PROC_API | |
2037 | { | |
2038 | struct { | |
37de36c6 | 2039 | procfs_ctl_t cmd; |
c3f6f71d | 2040 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2041 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
2042 | } arg; |
2043 | ||
2044 | arg.cmd = PCSHOLD; | |
37de36c6 | 2045 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2046 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
2047 | } | |
c906108c | 2048 | #else |
c3f6f71d | 2049 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 2050 | #endif |
c3f6f71d JM |
2051 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
2052 | pi->status_valid = 0; | |
2053 | ||
2054 | return win; | |
c906108c SS |
2055 | } |
2056 | ||
2057 | /* | |
c3f6f71d JM |
2058 | * Function: proc_get_pending_signals |
2059 | * | |
2060 | * returns the set of signals that are pending in the process or LWP. | |
2061 | * Will also copy the sigset if 'save' is non-zero. | |
2062 | */ | |
c906108c | 2063 | |
37de36c6 KB |
2064 | gdb_sigset_t * |
2065 | proc_get_pending_signals (procinfo *pi, gdb_sigset_t *save) | |
c3f6f71d | 2066 | { |
37de36c6 | 2067 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2068 | |
2069 | /* | |
2070 | * We should never have to apply this operation to any procinfo | |
2071 | * except the one for the main process. If that ever changes | |
19958708 | 2072 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2073 | * replace it with one that makes sure the ctl_fd is open. |
2074 | */ | |
19958708 | 2075 | |
c3f6f71d JM |
2076 | if (pi->tid != 0) |
2077 | pi = find_procinfo_or_die (pi->pid, 0); | |
2078 | ||
2079 | if (!pi->status_valid) | |
2080 | if (!proc_get_status (pi)) | |
2081 | return NULL; | |
2082 | ||
2083 | #ifdef NEW_PROC_API | |
2084 | ret = &pi->prstatus.pr_lwp.pr_lwppend; | |
2085 | #else | |
2086 | ret = &pi->prstatus.pr_sigpend; | |
2087 | #endif | |
2088 | if (save && ret) | |
37de36c6 | 2089 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2090 | |
c3f6f71d JM |
2091 | return ret; |
2092 | } | |
c906108c | 2093 | |
c3f6f71d JM |
2094 | /* |
2095 | * Function: proc_get_signal_actions | |
2096 | * | |
2097 | * returns the set of signal actions. | |
2098 | * Will also copy the sigactionset if 'save' is non-zero. | |
2099 | */ | |
c906108c | 2100 | |
37de36c6 KB |
2101 | gdb_sigaction_t * |
2102 | proc_get_signal_actions (procinfo *pi, gdb_sigaction_t *save) | |
c3f6f71d | 2103 | { |
37de36c6 | 2104 | gdb_sigaction_t *ret = NULL; |
c3f6f71d JM |
2105 | |
2106 | /* | |
2107 | * We should never have to apply this operation to any procinfo | |
2108 | * except the one for the main process. If that ever changes | |
19958708 | 2109 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2110 | * replace it with one that makes sure the ctl_fd is open. |
2111 | */ | |
19958708 | 2112 | |
c3f6f71d JM |
2113 | if (pi->tid != 0) |
2114 | pi = find_procinfo_or_die (pi->pid, 0); | |
2115 | ||
2116 | if (!pi->status_valid) | |
2117 | if (!proc_get_status (pi)) | |
2118 | return NULL; | |
2119 | ||
2120 | #ifdef NEW_PROC_API | |
2121 | ret = &pi->prstatus.pr_lwp.pr_action; | |
2122 | #else | |
2123 | ret = &pi->prstatus.pr_action; | |
2124 | #endif | |
2125 | if (save && ret) | |
37de36c6 | 2126 | memcpy (save, ret, sizeof (gdb_sigaction_t)); |
c906108c | 2127 | |
c3f6f71d JM |
2128 | return ret; |
2129 | } | |
c5aa993b | 2130 | |
c3f6f71d JM |
2131 | /* |
2132 | * Function: proc_get_held_signals | |
2133 | * | |
2134 | * returns the set of signals that are held / blocked. | |
2135 | * Will also copy the sigset if 'save' is non-zero. | |
c906108c SS |
2136 | */ |
2137 | ||
37de36c6 KB |
2138 | gdb_sigset_t * |
2139 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2140 | { |
37de36c6 | 2141 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2142 | |
2143 | /* | |
2144 | * We should never have to apply this operation to any procinfo | |
2145 | * except the one for the main process. If that ever changes | |
19958708 | 2146 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2147 | * replace it with one that makes sure the ctl_fd is open. |
2148 | */ | |
19958708 | 2149 | |
c3f6f71d JM |
2150 | if (pi->tid != 0) |
2151 | pi = find_procinfo_or_die (pi->pid, 0); | |
2152 | ||
2153 | #ifdef NEW_PROC_API | |
2154 | if (!pi->status_valid) | |
2155 | if (!proc_get_status (pi)) | |
2156 | return NULL; | |
2157 | ||
2158 | #ifdef UNIXWARE | |
2159 | ret = &pi->prstatus.pr_lwp.pr_context.uc_sigmask; | |
c906108c | 2160 | #else |
c3f6f71d JM |
2161 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
2162 | #endif /* UNIXWARE */ | |
2163 | #else /* not NEW_PROC_API */ | |
2164 | { | |
37de36c6 | 2165 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
2166 | |
2167 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
2168 | ret = &sigheld; | |
2169 | } | |
2170 | #endif /* NEW_PROC_API */ | |
2171 | if (save && ret) | |
37de36c6 | 2172 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
2173 | |
2174 | return ret; | |
c906108c SS |
2175 | } |
2176 | ||
c3f6f71d JM |
2177 | /* |
2178 | * Function: proc_get_traced_signals | |
2179 | * | |
2180 | * returns the set of signals that are traced / debugged. | |
2181 | * Will also copy the sigset if 'save' is non-zero. | |
2182 | */ | |
2183 | ||
37de36c6 KB |
2184 | gdb_sigset_t * |
2185 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) | |
c906108c | 2186 | { |
37de36c6 | 2187 | gdb_sigset_t *ret = NULL; |
c3f6f71d JM |
2188 | |
2189 | /* | |
2190 | * We should never have to apply this operation to any procinfo | |
2191 | * except the one for the main process. If that ever changes | |
19958708 | 2192 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2193 | * replace it with one that makes sure the ctl_fd is open. |
2194 | */ | |
19958708 | 2195 | |
c3f6f71d JM |
2196 | if (pi->tid != 0) |
2197 | pi = find_procinfo_or_die (pi->pid, 0); | |
2198 | ||
2199 | #ifdef NEW_PROC_API | |
2200 | if (!pi->status_valid) | |
2201 | if (!proc_get_status (pi)) | |
2202 | return NULL; | |
2203 | ||
2204 | ret = &pi->prstatus.pr_sigtrace; | |
2205 | #else | |
2206 | { | |
37de36c6 | 2207 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
2208 | |
2209 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
2210 | ret = &sigtrace; | |
2211 | } | |
c906108c | 2212 | #endif |
c3f6f71d | 2213 | if (save && ret) |
37de36c6 | 2214 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 2215 | |
c3f6f71d JM |
2216 | return ret; |
2217 | } | |
c906108c | 2218 | |
c3f6f71d JM |
2219 | /* |
2220 | * Function: proc_trace_signal | |
2221 | * | |
2222 | * Add 'signo' to the set of signals that are traced. | |
2223 | * Returns non-zero for success, zero for failure. | |
2224 | */ | |
c906108c | 2225 | |
c3f6f71d | 2226 | int |
fba45db2 | 2227 | proc_trace_signal (procinfo *pi, int signo) |
c3f6f71d | 2228 | { |
37de36c6 | 2229 | gdb_sigset_t temp; |
c3f6f71d JM |
2230 | |
2231 | /* | |
2232 | * We should never have to apply this operation to any procinfo | |
2233 | * except the one for the main process. If that ever changes | |
19958708 | 2234 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2235 | * replace it with one that makes sure the ctl_fd is open. |
2236 | */ | |
19958708 | 2237 | |
c3f6f71d JM |
2238 | if (pi->tid != 0) |
2239 | pi = find_procinfo_or_die (pi->pid, 0); | |
2240 | ||
2241 | if (pi) | |
c906108c | 2242 | { |
c3f6f71d | 2243 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2244 | { |
3c95f01c | 2245 | gdb_praddset (&temp, signo); |
c3f6f71d | 2246 | return proc_set_traced_signals (pi, &temp); |
c906108c SS |
2247 | } |
2248 | } | |
c5aa993b | 2249 | |
c3f6f71d JM |
2250 | return 0; /* failure */ |
2251 | } | |
c906108c | 2252 | |
c3f6f71d JM |
2253 | /* |
2254 | * Function: proc_ignore_signal | |
2255 | * | |
2256 | * Remove 'signo' from the set of signals that are traced. | |
2257 | * Returns non-zero for success, zero for failure. | |
2258 | */ | |
c906108c | 2259 | |
c3f6f71d | 2260 | int |
fba45db2 | 2261 | proc_ignore_signal (procinfo *pi, int signo) |
c3f6f71d | 2262 | { |
37de36c6 | 2263 | gdb_sigset_t temp; |
c3f6f71d JM |
2264 | |
2265 | /* | |
2266 | * We should never have to apply this operation to any procinfo | |
2267 | * except the one for the main process. If that ever changes | |
19958708 | 2268 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2269 | * replace it with one that makes sure the ctl_fd is open. |
2270 | */ | |
19958708 | 2271 | |
c3f6f71d JM |
2272 | if (pi->tid != 0) |
2273 | pi = find_procinfo_or_die (pi->pid, 0); | |
2274 | ||
2275 | if (pi) | |
c906108c | 2276 | { |
c3f6f71d | 2277 | if (proc_get_traced_signals (pi, &temp)) |
c906108c | 2278 | { |
3c95f01c | 2279 | gdb_prdelset (&temp, signo); |
c3f6f71d | 2280 | return proc_set_traced_signals (pi, &temp); |
c906108c | 2281 | } |
c906108c | 2282 | } |
c906108c | 2283 | |
c3f6f71d | 2284 | return 0; /* failure */ |
c906108c SS |
2285 | } |
2286 | ||
2287 | /* | |
c3f6f71d JM |
2288 | * Function: proc_get_traced_faults |
2289 | * | |
2290 | * returns the set of hardware faults that are traced /debugged. | |
2291 | * Will also copy the faultset if 'save' is non-zero. | |
2292 | */ | |
2293 | ||
2294 | fltset_t * | |
fba45db2 | 2295 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
2296 | { |
2297 | fltset_t *ret = NULL; | |
2298 | ||
2299 | /* | |
2300 | * We should never have to apply this operation to any procinfo | |
2301 | * except the one for the main process. If that ever changes | |
19958708 | 2302 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2303 | * replace it with one that makes sure the ctl_fd is open. |
2304 | */ | |
19958708 | 2305 | |
c3f6f71d JM |
2306 | if (pi->tid != 0) |
2307 | pi = find_procinfo_or_die (pi->pid, 0); | |
2308 | ||
2309 | #ifdef NEW_PROC_API | |
2310 | if (!pi->status_valid) | |
2311 | if (!proc_get_status (pi)) | |
2312 | return NULL; | |
2313 | ||
2314 | ret = &pi->prstatus.pr_flttrace; | |
2315 | #else | |
2316 | { | |
2317 | static fltset_t flttrace; | |
2318 | ||
2319 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
2320 | ret = &flttrace; | |
2321 | } | |
2322 | #endif | |
2323 | if (save && ret) | |
2324 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 2325 | |
c3f6f71d JM |
2326 | return ret; |
2327 | } | |
c906108c | 2328 | |
c3f6f71d JM |
2329 | /* |
2330 | * Function: proc_get_traced_sysentry | |
2331 | * | |
2332 | * returns the set of syscalls that are traced /debugged on entry. | |
2333 | * Will also copy the syscall set if 'save' is non-zero. | |
2334 | */ | |
c906108c | 2335 | |
c3f6f71d | 2336 | sysset_t * |
fba45db2 | 2337 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
2338 | { |
2339 | sysset_t *ret = NULL; | |
2340 | ||
2341 | /* | |
2342 | * We should never have to apply this operation to any procinfo | |
2343 | * except the one for the main process. If that ever changes | |
19958708 | 2344 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2345 | * replace it with one that makes sure the ctl_fd is open. |
2346 | */ | |
19958708 | 2347 | |
c3f6f71d JM |
2348 | if (pi->tid != 0) |
2349 | pi = find_procinfo_or_die (pi->pid, 0); | |
2350 | ||
2351 | #ifdef NEW_PROC_API | |
2352 | if (!pi->status_valid) | |
2353 | if (!proc_get_status (pi)) | |
2354 | return NULL; | |
2355 | ||
37de36c6 | 2356 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2357 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
2358 | #else /* DYNAMIC_SYSCALLS */ |
2359 | { | |
2360 | static sysset_t *sysentry; | |
2361 | size_t size; | |
2362 | ||
2363 | if (!sysentry) | |
2364 | sysentry = sysset_t_alloc (pi); | |
2365 | ret = sysentry; | |
2366 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2367 | return NULL; | |
2368 | if (pi->prstatus.pr_sysentry_offset == 0) | |
2369 | { | |
2370 | gdb_premptysysset (sysentry); | |
2371 | } | |
2372 | else | |
2373 | { | |
2374 | int rsize; | |
2375 | ||
2376 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
2377 | SEEK_SET) | |
2378 | != (off_t) pi->prstatus.pr_sysentry_offset) | |
2379 | return NULL; | |
2380 | size = sysset_t_size (pi); | |
2381 | gdb_premptysysset (sysentry); | |
2382 | rsize = read (pi->status_fd, sysentry, size); | |
2383 | if (rsize < 0) | |
2384 | return NULL; | |
2385 | } | |
2386 | } | |
2387 | #endif /* DYNAMIC_SYSCALLS */ | |
2388 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
2389 | { |
2390 | static sysset_t sysentry; | |
c906108c | 2391 | |
c3f6f71d JM |
2392 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
2393 | ret = &sysentry; | |
2394 | } | |
37de36c6 | 2395 | #endif /* NEW_PROC_API */ |
c3f6f71d | 2396 | if (save && ret) |
37de36c6 | 2397 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 2398 | |
c3f6f71d JM |
2399 | return ret; |
2400 | } | |
c5aa993b | 2401 | |
c3f6f71d JM |
2402 | /* |
2403 | * Function: proc_get_traced_sysexit | |
2404 | * | |
2405 | * returns the set of syscalls that are traced /debugged on exit. | |
2406 | * Will also copy the syscall set if 'save' is non-zero. | |
c906108c SS |
2407 | */ |
2408 | ||
c3f6f71d | 2409 | sysset_t * |
fba45db2 | 2410 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 2411 | { |
c3f6f71d JM |
2412 | sysset_t * ret = NULL; |
2413 | ||
2414 | /* | |
2415 | * We should never have to apply this operation to any procinfo | |
2416 | * except the one for the main process. If that ever changes | |
19958708 | 2417 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2418 | * replace it with one that makes sure the ctl_fd is open. |
2419 | */ | |
19958708 | 2420 | |
c3f6f71d JM |
2421 | if (pi->tid != 0) |
2422 | pi = find_procinfo_or_die (pi->pid, 0); | |
2423 | ||
2424 | #ifdef NEW_PROC_API | |
2425 | if (!pi->status_valid) | |
2426 | if (!proc_get_status (pi)) | |
2427 | return NULL; | |
2428 | ||
37de36c6 | 2429 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 2430 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
2431 | #else /* DYNAMIC_SYSCALLS */ |
2432 | { | |
2433 | static sysset_t *sysexit; | |
2434 | size_t size; | |
2435 | ||
2436 | if (!sysexit) | |
2437 | sysexit = sysset_t_alloc (pi); | |
2438 | ret = sysexit; | |
2439 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
2440 | return NULL; | |
2441 | if (pi->prstatus.pr_sysexit_offset == 0) | |
2442 | { | |
2443 | gdb_premptysysset (sysexit); | |
2444 | } | |
2445 | else | |
2446 | { | |
2447 | int rsize; | |
2448 | ||
2449 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, SEEK_SET) | |
2450 | != (off_t) pi->prstatus.pr_sysexit_offset) | |
2451 | return NULL; | |
2452 | size = sysset_t_size (pi); | |
2453 | gdb_premptysysset (sysexit); | |
2454 | rsize = read (pi->status_fd, sysexit, size); | |
2455 | if (rsize < 0) | |
2456 | return NULL; | |
2457 | } | |
2458 | } | |
2459 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2460 | #else |
2461 | { | |
2462 | static sysset_t sysexit; | |
c5aa993b | 2463 | |
c3f6f71d JM |
2464 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2465 | ret = &sysexit; | |
2466 | } | |
2467 | #endif | |
2468 | if (save && ret) | |
37de36c6 | 2469 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2470 | |
2471 | return ret; | |
2472 | } | |
c906108c | 2473 | |
c3f6f71d JM |
2474 | /* |
2475 | * Function: proc_clear_current_fault | |
2476 | * | |
2477 | * The current fault (if any) is cleared; the associated signal | |
2478 | * will not be sent to the process or LWP when it resumes. | |
2479 | * Returns non-zero for success, zero for failure. | |
2480 | */ | |
c906108c | 2481 | |
c3f6f71d | 2482 | int |
fba45db2 | 2483 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2484 | { |
2485 | int win; | |
2486 | ||
2487 | /* | |
2488 | * We should never have to apply this operation to any procinfo | |
2489 | * except the one for the main process. If that ever changes | |
19958708 | 2490 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2491 | * replace it with one that makes sure the ctl_fd is open. |
2492 | */ | |
19958708 | 2493 | |
c3f6f71d JM |
2494 | if (pi->tid != 0) |
2495 | pi = find_procinfo_or_die (pi->pid, 0); | |
2496 | ||
2497 | #ifdef NEW_PROC_API | |
2498 | { | |
37de36c6 | 2499 | procfs_ctl_t cmd = PCCFAULT; |
c3f6f71d JM |
2500 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2501 | } | |
2502 | #else | |
2503 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2504 | #endif | |
2505 | ||
2506 | return win; | |
c906108c SS |
2507 | } |
2508 | ||
2509 | /* | |
c3f6f71d JM |
2510 | * Function: proc_set_current_signal |
2511 | * | |
2512 | * Set the "current signal" that will be delivered next to the process. | |
2513 | * NOTE: semantics are different from those of KILL. | |
2514 | * This signal will be delivered to the process or LWP | |
2515 | * immediately when it is resumed (even if the signal is held/blocked); | |
2516 | * it will NOT immediately cause another event of interest, and will NOT | |
2517 | * first trap back to the debugger. | |
2518 | * | |
2519 | * Returns non-zero for success, zero for failure. | |
2520 | */ | |
2521 | ||
2522 | int | |
fba45db2 | 2523 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2524 | { |
2525 | int win; | |
2526 | struct { | |
37de36c6 | 2527 | procfs_ctl_t cmd; |
c3f6f71d | 2528 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2529 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2530 | } arg; |
73930d4d | 2531 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2532 | ptid_t wait_ptid; |
2533 | struct target_waitstatus wait_status; | |
c3f6f71d JM |
2534 | |
2535 | /* | |
2536 | * We should never have to apply this operation to any procinfo | |
2537 | * except the one for the main process. If that ever changes | |
19958708 | 2538 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2539 | * replace it with one that makes sure the ctl_fd is open. |
2540 | */ | |
19958708 | 2541 | |
c3f6f71d JM |
2542 | if (pi->tid != 0) |
2543 | pi = find_procinfo_or_die (pi->pid, 0); | |
2544 | ||
2545 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2546 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
2547 | * receives a PIOCSSIG with a signal identical to the current signal, | |
19958708 | 2548 | * it messes up the current signal. Work around the kernel bug. |
c3f6f71d JM |
2549 | */ |
2550 | if (signo > 0 && | |
2551 | signo == proc_cursig (pi)) | |
2552 | return 1; /* I assume this is a success? */ | |
2553 | #endif | |
2554 | ||
2555 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2556 | get_last_target_status (&wait_ptid, &wait_status); |
2557 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2558 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2559 | && wait_status.value.sig == target_signal_from_host (signo) | |
2560 | && proc_get_status (pi) | |
2561 | #ifdef NEW_PROC_API | |
2562 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2563 | #else | |
2564 | && pi->prstatus.pr_info.si_signo == signo | |
2565 | #endif | |
2566 | ) | |
2567 | /* Use the siginfo associated with the signal being | |
2568 | redelivered. */ | |
2569 | #ifdef NEW_PROC_API | |
73930d4d | 2570 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2571 | #else |
73930d4d | 2572 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2573 | #endif |
2574 | else | |
2575 | { | |
73930d4d KH |
2576 | mysinfo.si_signo = signo; |
2577 | mysinfo.si_code = 0; | |
2578 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2579 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2580 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2581 | } |
c3f6f71d JM |
2582 | |
2583 | #ifdef NEW_PROC_API | |
2584 | arg.cmd = PCSSIG; | |
2585 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2586 | #else | |
2587 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2588 | #endif | |
c906108c | 2589 | |
c3f6f71d JM |
2590 | return win; |
2591 | } | |
c906108c | 2592 | |
c3f6f71d JM |
2593 | /* |
2594 | * Function: proc_clear_current_signal | |
2595 | * | |
2596 | * The current signal (if any) is cleared, and | |
2597 | * is not sent to the process or LWP when it resumes. | |
2598 | * Returns non-zero for success, zero for failure. | |
2599 | */ | |
c906108c | 2600 | |
c3f6f71d | 2601 | int |
fba45db2 | 2602 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2603 | { |
2604 | int win; | |
2605 | ||
2606 | /* | |
2607 | * We should never have to apply this operation to any procinfo | |
2608 | * except the one for the main process. If that ever changes | |
19958708 | 2609 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2610 | * replace it with one that makes sure the ctl_fd is open. |
2611 | */ | |
19958708 | 2612 | |
c3f6f71d JM |
2613 | if (pi->tid != 0) |
2614 | pi = find_procinfo_or_die (pi->pid, 0); | |
2615 | ||
2616 | #ifdef NEW_PROC_API | |
2617 | { | |
2618 | struct { | |
37de36c6 | 2619 | procfs_ctl_t cmd; |
c3f6f71d | 2620 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2621 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2622 | } arg; |
73930d4d | 2623 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2624 | |
2625 | arg.cmd = PCSSIG; | |
2626 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2627 | mysinfo.si_signo = 0; |
2628 | mysinfo.si_code = 0; | |
2629 | mysinfo.si_errno = 0; | |
2630 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2631 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2632 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2633 | |
2634 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2635 | } | |
2636 | #else | |
2637 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2638 | #endif | |
c906108c | 2639 | |
c3f6f71d JM |
2640 | return win; |
2641 | } | |
c906108c | 2642 | |
772cf8be MK |
2643 | /* Return the general-purpose registers for the process or LWP |
2644 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2645 | |
c3f6f71d | 2646 | gdb_gregset_t * |
fba45db2 | 2647 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2648 | { |
2649 | if (!pi->status_valid || !pi->gregs_valid) | |
2650 | if (!proc_get_status (pi)) | |
2651 | return NULL; | |
2652 | ||
772cf8be MK |
2653 | /* OK, sorry about the ifdef's. There's three cases instead of two, |
2654 | because in this case Unixware and Solaris/RW differ. */ | |
c3f6f71d JM |
2655 | |
2656 | #ifdef NEW_PROC_API | |
772cf8be | 2657 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2658 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.gregs; |
772cf8be | 2659 | # else |
c3f6f71d | 2660 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be MK |
2661 | # endif |
2662 | #else | |
c3f6f71d | 2663 | return &pi->prstatus.pr_reg; |
772cf8be | 2664 | #endif |
c3f6f71d | 2665 | } |
c5aa993b | 2666 | |
772cf8be MK |
2667 | /* Return the general-purpose registers for the process or LWP |
2668 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2669 | |
c3f6f71d | 2670 | gdb_fpregset_t * |
fba45db2 | 2671 | proc_get_fpregs (procinfo *pi) |
c906108c | 2672 | { |
c3f6f71d JM |
2673 | #ifdef NEW_PROC_API |
2674 | if (!pi->status_valid || !pi->fpregs_valid) | |
2675 | if (!proc_get_status (pi)) | |
2676 | return NULL; | |
2677 | ||
772cf8be | 2678 | # ifdef UNIXWARE /* FIXME: Should be autoconfigured. */ |
c3f6f71d | 2679 | return &pi->prstatus.pr_lwp.pr_context.uc_mcontext.fpregs; |
772cf8be | 2680 | # else |
c3f6f71d | 2681 | return &pi->prstatus.pr_lwp.pr_fpreg; |
772cf8be | 2682 | # endif |
c5aa993b | 2683 | |
772cf8be | 2684 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2685 | if (pi->fpregs_valid) |
772cf8be | 2686 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2687 | else |
c906108c | 2688 | { |
772cf8be | 2689 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2690 | { |
c3f6f71d | 2691 | return NULL; |
c906108c | 2692 | } |
c3f6f71d | 2693 | else |
c906108c | 2694 | { |
772cf8be | 2695 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2696 | struct { |
2697 | long pr_count; | |
2698 | tid_t pr_error_thread; | |
2699 | tfpregset_t thread_1; | |
2700 | } thread_fpregs; | |
2701 | ||
2702 | thread_fpregs.pr_count = 1; | |
2703 | thread_fpregs.thread_1.tid = pi->tid; | |
2704 | ||
772cf8be MK |
2705 | if (pi->tid == 0 |
2706 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2707 | { |
2708 | pi->fpregs_valid = 1; | |
772cf8be | 2709 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2710 | } |
772cf8be MK |
2711 | else if (pi->tid != 0 |
2712 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2713 | { |
2714 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2715 | sizeof (pi->fpregset)); | |
2716 | pi->fpregs_valid = 1; | |
772cf8be | 2717 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2718 | } |
2719 | else | |
2720 | { | |
2721 | return NULL; | |
2722 | } | |
772cf8be | 2723 | # else |
c3f6f71d JM |
2724 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2725 | { | |
2726 | pi->fpregs_valid = 1; | |
772cf8be | 2727 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2728 | } |
2729 | else | |
2730 | { | |
2731 | return NULL; | |
2732 | } | |
772cf8be | 2733 | # endif |
c906108c | 2734 | } |
c906108c | 2735 | } |
772cf8be | 2736 | #endif /* NEW_PROC_API */ |
c906108c SS |
2737 | } |
2738 | ||
772cf8be MK |
2739 | /* Write the general-purpose registers back to the process or LWP |
2740 | corresponding to PI. Return non-zero for success, zero for | |
2741 | failure. */ | |
c3f6f71d JM |
2742 | |
2743 | int | |
fba45db2 | 2744 | proc_set_gregs (procinfo *pi) |
c906108c | 2745 | { |
c3f6f71d JM |
2746 | gdb_gregset_t *gregs; |
2747 | int win; | |
c5aa993b | 2748 | |
772cf8be MK |
2749 | gregs = proc_get_gregs (pi); |
2750 | if (gregs == NULL) | |
2751 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2752 | |
772cf8be | 2753 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2754 | { |
c3f6f71d | 2755 | return 0; |
c906108c | 2756 | } |
c3f6f71d | 2757 | else |
c906108c | 2758 | { |
c3f6f71d JM |
2759 | #ifdef NEW_PROC_API |
2760 | struct { | |
37de36c6 | 2761 | procfs_ctl_t cmd; |
c3f6f71d JM |
2762 | /* Use char array to avoid alignment issues. */ |
2763 | char gregs[sizeof (gdb_gregset_t)]; | |
2764 | } arg; | |
2765 | ||
772cf8be | 2766 | arg.cmd = PCSREG; |
c3f6f71d JM |
2767 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2768 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2769 | #else | |
2770 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2771 | #endif | |
c906108c | 2772 | } |
c3f6f71d | 2773 | |
772cf8be | 2774 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2775 | pi->gregs_valid = 0; |
2776 | return win; | |
c906108c SS |
2777 | } |
2778 | ||
772cf8be MK |
2779 | /* Write the floating-pointer registers back to the process or LWP |
2780 | corresponding to PI. Return non-zero for success, zero for | |
2781 | failure. */ | |
c3f6f71d JM |
2782 | |
2783 | int | |
fba45db2 | 2784 | proc_set_fpregs (procinfo *pi) |
c906108c | 2785 | { |
c3f6f71d JM |
2786 | gdb_fpregset_t *fpregs; |
2787 | int win; | |
2788 | ||
772cf8be MK |
2789 | fpregs = proc_get_fpregs (pi); |
2790 | if (fpregs == NULL) | |
2791 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2792 | |
772cf8be | 2793 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2794 | { |
c3f6f71d | 2795 | return 0; |
c906108c | 2796 | } |
c3f6f71d | 2797 | else |
c906108c | 2798 | { |
c3f6f71d JM |
2799 | #ifdef NEW_PROC_API |
2800 | struct { | |
37de36c6 | 2801 | procfs_ctl_t cmd; |
c3f6f71d JM |
2802 | /* Use char array to avoid alignment issues. */ |
2803 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2804 | } arg; | |
2805 | ||
772cf8be | 2806 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2807 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2808 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2809 | #else | |
772cf8be | 2810 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2811 | if (pi->tid == 0) |
2812 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2813 | else | |
2814 | { | |
2815 | struct { | |
2816 | long pr_count; | |
2817 | tid_t pr_error_thread; | |
2818 | tfpregset_t thread_1; | |
2819 | } thread_fpregs; | |
2820 | ||
2821 | thread_fpregs.pr_count = 1; | |
2822 | thread_fpregs.thread_1.tid = pi->tid; | |
2823 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2824 | sizeof (*fpregs)); | |
2825 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2826 | } | |
772cf8be | 2827 | # else |
c3f6f71d | 2828 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2829 | # endif |
2830 | #endif /* NEW_PROC_API */ | |
c906108c | 2831 | } |
c3f6f71d | 2832 | |
772cf8be | 2833 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2834 | pi->fpregs_valid = 0; |
2835 | return win; | |
c906108c SS |
2836 | } |
2837 | ||
2838 | /* | |
c3f6f71d JM |
2839 | * Function: proc_kill |
2840 | * | |
2841 | * Send a signal to the proc or lwp with the semantics of "kill()". | |
2842 | * Returns non-zero for success, zero for failure. | |
2843 | */ | |
c906108c | 2844 | |
c3f6f71d | 2845 | int |
fba45db2 | 2846 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2847 | { |
2848 | int win; | |
c906108c | 2849 | |
c3f6f71d JM |
2850 | /* |
2851 | * We might conceivably apply this operation to an LWP, and | |
2852 | * the LWP's ctl file descriptor might not be open. | |
2853 | */ | |
c906108c | 2854 | |
c3f6f71d JM |
2855 | if (pi->ctl_fd == 0 && |
2856 | open_procinfo_files (pi, FD_CTL) == 0) | |
2857 | { | |
2858 | return 0; | |
2859 | } | |
2860 | else | |
2861 | { | |
2862 | #ifdef NEW_PROC_API | |
37de36c6 | 2863 | procfs_ctl_t cmd[2]; |
c906108c | 2864 | |
c3f6f71d JM |
2865 | cmd[0] = PCKILL; |
2866 | cmd[1] = signo; | |
2867 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2868 | #else /* ioctl method */ | |
2869 | /* FIXME: do I need the Alpha OSF fixups present in | |
2870 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ | |
2871 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); | |
2872 | #endif | |
2873 | } | |
c906108c | 2874 | |
c3f6f71d JM |
2875 | return win; |
2876 | } | |
c906108c | 2877 | |
c3f6f71d JM |
2878 | /* |
2879 | * Function: proc_parent_pid | |
2880 | * | |
2881 | * Find the pid of the process that started this one. | |
2882 | * Returns the parent process pid, or zero. | |
c906108c SS |
2883 | */ |
2884 | ||
c3f6f71d | 2885 | int |
fba45db2 | 2886 | proc_parent_pid (procinfo *pi) |
c906108c | 2887 | { |
c3f6f71d JM |
2888 | /* |
2889 | * We should never have to apply this operation to any procinfo | |
2890 | * except the one for the main process. If that ever changes | |
19958708 | 2891 | * for any reason, then take out the following clause and |
c3f6f71d JM |
2892 | * replace it with one that makes sure the ctl_fd is open. |
2893 | */ | |
19958708 | 2894 | |
c3f6f71d JM |
2895 | if (pi->tid != 0) |
2896 | pi = find_procinfo_or_die (pi->pid, 0); | |
2897 | ||
2898 | if (!pi->status_valid) | |
2899 | if (!proc_get_status (pi)) | |
2900 | return 0; | |
c5aa993b | 2901 | |
c3f6f71d JM |
2902 | return pi->prstatus.pr_ppid; |
2903 | } | |
2904 | ||
2905 | ||
9a043c1d AC |
2906 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2907 | (a.k.a void pointer)! */ | |
2908 | ||
2909 | static void * | |
2910 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2911 | { | |
4e906f53 | 2912 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
9a043c1d AC |
2913 | void *ptr; |
2914 | ||
4e906f53 | 2915 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
0b62613e PA |
2916 | gdbarch_address_to_pointer (target_gdbarch, ptr_type, |
2917 | (gdb_byte *) &ptr, addr); | |
9a043c1d AC |
2918 | return ptr; |
2919 | } | |
2920 | ||
c3f6f71d JM |
2921 | /* |
2922 | * Function: proc_set_watchpoint | |
2923 | * | |
2924 | */ | |
2925 | ||
2926 | int | |
fba45db2 | 2927 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2928 | { |
d1a7880c PA |
2929 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2930 | /* If neither or these is defined, we can't support watchpoints. | |
2931 | This just avoids possibly failing to compile the below on such | |
2932 | systems. */ | |
c3f6f71d JM |
2933 | return 0; |
2934 | #else | |
2935 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5 */ | |
2936 | #if defined (PIOCOPENLWP) || defined (UNIXWARE) /* Solaris 2.5: bail out */ | |
2937 | return 0; | |
2938 | #else | |
2939 | struct { | |
37de36c6 | 2940 | procfs_ctl_t cmd; |
c3f6f71d JM |
2941 | char watch[sizeof (prwatch_t)]; |
2942 | } arg; | |
73930d4d | 2943 | prwatch_t pwatch; |
c3f6f71d | 2944 | |
9a043c1d AC |
2945 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2946 | convert a target address into something that can be stored in a | |
2947 | native data structure. */ | |
831e682e | 2948 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2949 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2950 | #else |
73930d4d | 2951 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2952 | #endif |
73930d4d KH |
2953 | pwatch.pr_size = len; |
2954 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2955 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2956 | arg.cmd = PCWATCH; | |
73930d4d | 2957 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2958 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2959 | #else | |
2960 | #if defined (PIOCSWATCH) | |
73930d4d | 2961 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2962 | #else |
2963 | return 0; /* Fail */ | |
2964 | #endif | |
2965 | #endif | |
2966 | #endif | |
2967 | #endif | |
c906108c SS |
2968 | } |
2969 | ||
965b60ee | 2970 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2971 | |
c3f6f71d | 2972 | #include <sys/sysi86.h> |
c906108c | 2973 | |
c3f6f71d JM |
2974 | /* |
2975 | * Function: proc_get_LDT_entry | |
2976 | * | |
2977 | * Inputs: | |
2978 | * procinfo *pi; | |
2979 | * int key; | |
2980 | * | |
2981 | * The 'key' is actually the value of the lower 16 bits of | |
2982 | * the GS register for the LWP that we're interested in. | |
2983 | * | |
2984 | * Return: matching ssh struct (LDT entry). | |
c906108c SS |
2985 | */ |
2986 | ||
c3f6f71d | 2987 | struct ssd * |
fba45db2 | 2988 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2989 | { |
c3f6f71d JM |
2990 | static struct ssd *ldt_entry = NULL; |
2991 | #ifdef NEW_PROC_API | |
2992 | char pathname[MAX_PROC_NAME_SIZE]; | |
2993 | struct cleanup *old_chain = NULL; | |
2994 | int fd; | |
2995 | ||
2996 | /* Allocate space for one LDT entry. | |
2997 | This alloc must persist, because we return a pointer to it. */ | |
2998 | if (ldt_entry == NULL) | |
2999 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
3000 | ||
3001 | /* Open the file descriptor for the LDT table. */ | |
3002 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 3003 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 3004 | { |
c3f6f71d JM |
3005 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
3006 | return NULL; | |
c906108c | 3007 | } |
c3f6f71d | 3008 | /* Make sure it gets closed again! */ |
004527cb | 3009 | old_chain = make_cleanup_close (fd); |
c906108c | 3010 | |
c3f6f71d JM |
3011 | /* Now 'read' thru the table, find a match and return it. */ |
3012 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 3013 | { |
c3f6f71d JM |
3014 | if (ldt_entry->sel == 0 && |
3015 | ldt_entry->bo == 0 && | |
3016 | ldt_entry->acc1 == 0 && | |
3017 | ldt_entry->acc2 == 0) | |
3018 | break; /* end of table */ | |
3019 | /* If key matches, return this entry. */ | |
3020 | if (ldt_entry->sel == key) | |
3021 | return ldt_entry; | |
c906108c | 3022 | } |
c3f6f71d JM |
3023 | /* Loop ended, match not found. */ |
3024 | return NULL; | |
3025 | #else | |
3026 | int nldt, i; | |
3027 | static int nalloc = 0; | |
c906108c | 3028 | |
c3f6f71d JM |
3029 | /* Get the number of LDT entries. */ |
3030 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 3031 | { |
c3f6f71d JM |
3032 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
3033 | return NULL; | |
c906108c SS |
3034 | } |
3035 | ||
c3f6f71d JM |
3036 | /* Allocate space for the number of LDT entries. */ |
3037 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
3038 | if (nldt > nalloc) | |
c906108c | 3039 | { |
19958708 | 3040 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
3041 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
3042 | nalloc = nldt; | |
3043 | } | |
19958708 | 3044 | |
c3f6f71d JM |
3045 | /* Read the whole table in one gulp. */ |
3046 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
3047 | { | |
3048 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
3049 | return NULL; | |
c906108c SS |
3050 | } |
3051 | ||
c3f6f71d JM |
3052 | /* Search the table and return the (first) entry matching 'key'. */ |
3053 | for (i = 0; i < nldt; i++) | |
3054 | if (ldt_entry[i].sel == key) | |
3055 | return &ldt_entry[i]; | |
c906108c | 3056 | |
c3f6f71d JM |
3057 | /* Loop ended, match not found. */ |
3058 | return NULL; | |
3059 | #endif | |
3060 | } | |
c906108c | 3061 | |
965b60ee JB |
3062 | /* |
3063 | * Function: procfs_find_LDT_entry | |
3064 | * | |
3065 | * Input: | |
3066 | * ptid_t ptid; // The GDB-style pid-plus-LWP. | |
3067 | * | |
3068 | * Return: | |
3069 | * pointer to the corresponding LDT entry. | |
3070 | */ | |
3071 | ||
3072 | struct ssd * | |
3073 | procfs_find_LDT_entry (ptid_t ptid) | |
3074 | { | |
3075 | gdb_gregset_t *gregs; | |
3076 | int key; | |
3077 | procinfo *pi; | |
3078 | ||
3079 | /* Find procinfo for the lwp. */ | |
3080 | if ((pi = find_procinfo (PIDGET (ptid), TIDGET (ptid))) == NULL) | |
3081 | { | |
0b62613e | 3082 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
965b60ee JB |
3083 | PIDGET (ptid), TIDGET (ptid)); |
3084 | return NULL; | |
3085 | } | |
3086 | /* get its general registers. */ | |
3087 | if ((gregs = proc_get_gregs (pi)) == NULL) | |
3088 | { | |
0b62613e | 3089 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
965b60ee JB |
3090 | PIDGET (ptid), TIDGET (ptid)); |
3091 | return NULL; | |
3092 | } | |
3093 | /* Now extract the GS register's lower 16 bits. */ | |
3094 | key = (*gregs)[GS] & 0xffff; | |
3095 | ||
3096 | /* Find the matching entry and return it. */ | |
3097 | return proc_get_LDT_entry (pi, key); | |
3098 | } | |
3099 | ||
3100 | #endif | |
c906108c | 3101 | |
c3f6f71d | 3102 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 3103 | |
c3f6f71d | 3104 | /* =================== Thread "MODULE" =================== */ |
c906108c | 3105 | |
c3f6f71d JM |
3106 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
3107 | since there is a different way to do threads on every OS. */ | |
c906108c | 3108 | |
c3f6f71d | 3109 | /* |
19958708 | 3110 | * Function: proc_get_nthreads |
c3f6f71d | 3111 | * |
19958708 | 3112 | * Return the number of threads for the process |
c3f6f71d | 3113 | */ |
c906108c | 3114 | |
c3f6f71d JM |
3115 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
3116 | /* | |
3117 | * OSF version | |
3118 | */ | |
19958708 | 3119 | int |
fba45db2 | 3120 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
3121 | { |
3122 | int nthreads = 0; | |
c906108c | 3123 | |
c3f6f71d JM |
3124 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
3125 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 3126 | |
c3f6f71d | 3127 | return nthreads; |
c906108c SS |
3128 | } |
3129 | ||
c3f6f71d JM |
3130 | #else |
3131 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3132 | /* | |
3133 | * Solaris and Unixware version | |
3134 | */ | |
3135 | int | |
fba45db2 | 3136 | proc_get_nthreads (procinfo *pi) |
c906108c | 3137 | { |
c3f6f71d JM |
3138 | if (!pi->status_valid) |
3139 | if (!proc_get_status (pi)) | |
3140 | return 0; | |
c5aa993b | 3141 | |
c3f6f71d | 3142 | /* |
19958708 | 3143 | * NEW_PROC_API: only works for the process procinfo, |
c3f6f71d JM |
3144 | * because the LWP procinfos do not get prstatus filled in. |
3145 | */ | |
19958708 | 3146 | #ifdef NEW_PROC_API |
c3f6f71d JM |
3147 | if (pi->tid != 0) /* find the parent process procinfo */ |
3148 | pi = find_procinfo_or_die (pi->pid, 0); | |
c5aa993b | 3149 | #endif |
c3f6f71d | 3150 | return pi->prstatus.pr_nlwp; |
c906108c SS |
3151 | } |
3152 | ||
c3f6f71d JM |
3153 | #else |
3154 | /* | |
3155 | * Default version | |
3156 | */ | |
3157 | int | |
fba45db2 | 3158 | proc_get_nthreads (procinfo *pi) |
c906108c | 3159 | { |
c3f6f71d JM |
3160 | return 0; |
3161 | } | |
3162 | #endif | |
3163 | #endif | |
3164 | ||
3165 | /* | |
3166 | * Function: proc_get_current_thread (LWP version) | |
3167 | * | |
3168 | * Return the ID of the thread that had an event of interest. | |
3169 | * (ie. the one that hit a breakpoint or other traced event). | |
3170 | * All other things being equal, this should be the ID of a | |
3171 | * thread that is currently executing. | |
3172 | */ | |
3173 | ||
3174 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
3175 | /* | |
3176 | * Solaris and Unixware version | |
3177 | */ | |
3178 | int | |
fba45db2 | 3179 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3180 | { |
3181 | /* | |
3182 | * Note: this should be applied to the root procinfo for the process, | |
3183 | * not to the procinfo for an LWP. If applied to the procinfo for | |
19958708 | 3184 | * an LWP, it will simply return that LWP's ID. In that case, |
c3f6f71d JM |
3185 | * find the parent process procinfo. |
3186 | */ | |
19958708 | 3187 | |
c3f6f71d JM |
3188 | if (pi->tid != 0) |
3189 | pi = find_procinfo_or_die (pi->pid, 0); | |
3190 | ||
3191 | if (!pi->status_valid) | |
3192 | if (!proc_get_status (pi)) | |
3193 | return 0; | |
3194 | ||
3195 | #ifdef NEW_PROC_API | |
3196 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 3197 | #else |
c3f6f71d | 3198 | return pi->prstatus.pr_who; |
c906108c | 3199 | #endif |
c3f6f71d | 3200 | } |
c906108c | 3201 | |
c3f6f71d JM |
3202 | #else |
3203 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
3204 | /* | |
3205 | * OSF version | |
3206 | */ | |
19958708 | 3207 | int |
fba45db2 | 3208 | proc_get_current_thread (procinfo *pi) |
c3f6f71d JM |
3209 | { |
3210 | #if 0 /* FIXME: not ready for prime time? */ | |
3211 | return pi->prstatus.pr_tid; | |
3212 | #else | |
3213 | return 0; | |
3214 | #endif | |
c906108c SS |
3215 | } |
3216 | ||
c3f6f71d JM |
3217 | #else |
3218 | /* | |
3219 | * Default version | |
3220 | */ | |
19958708 | 3221 | int |
fba45db2 | 3222 | proc_get_current_thread (procinfo *pi) |
c906108c | 3223 | { |
c3f6f71d JM |
3224 | return 0; |
3225 | } | |
3226 | ||
3227 | #endif | |
3228 | #endif | |
c906108c | 3229 | |
c3f6f71d | 3230 | /* |
19958708 | 3231 | * Function: proc_update_threads |
c3f6f71d JM |
3232 | * |
3233 | * Discover the IDs of all the threads within the process, and | |
3234 | * create a procinfo for each of them (chained to the parent). | |
3235 | * | |
3236 | * This unfortunately requires a different method on every OS. | |
3237 | * | |
3238 | * Return: non-zero for success, zero for failure. | |
3239 | */ | |
c906108c | 3240 | |
c3f6f71d | 3241 | int |
fba45db2 | 3242 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
3243 | { |
3244 | if (thread && parent) /* sanity */ | |
c906108c | 3245 | { |
c3f6f71d JM |
3246 | thread->status_valid = 0; |
3247 | if (!proc_get_status (thread)) | |
3248 | destroy_one_procinfo (&parent->thread_list, thread); | |
3249 | } | |
3250 | return 0; /* keep iterating */ | |
3251 | } | |
c5aa993b | 3252 | |
c3f6f71d JM |
3253 | #if defined (PIOCLSTATUS) |
3254 | /* | |
3255 | * Solaris 2.5 (ioctl) version | |
3256 | */ | |
3257 | int | |
fba45db2 | 3258 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3259 | { |
3260 | gdb_prstatus_t *prstatus; | |
3261 | struct cleanup *old_chain = NULL; | |
3262 | procinfo *thread; | |
3263 | int nlwp, i; | |
3264 | ||
3265 | /* | |
3266 | * We should never have to apply this operation to any procinfo | |
3267 | * except the one for the main process. If that ever changes | |
19958708 | 3268 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3269 | * replace it with one that makes sure the ctl_fd is open. |
3270 | */ | |
19958708 | 3271 | |
c3f6f71d JM |
3272 | if (pi->tid != 0) |
3273 | pi = find_procinfo_or_die (pi->pid, 0); | |
3274 | ||
3275 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3276 | ||
3277 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
3278 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
3279 | ||
3c37485b | 3280 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 3281 | |
b8c9b27d | 3282 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
3283 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
3284 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
3285 | ||
3286 | /* Skip element zero, which represents the process as a whole. */ | |
3287 | for (i = 1; i < nlwp + 1; i++) | |
3288 | { | |
3289 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
3290 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 3291 | |
c3f6f71d JM |
3292 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
3293 | thread->status_valid = 1; | |
3294 | } | |
3295 | pi->threads_valid = 1; | |
3296 | do_cleanups (old_chain); | |
3297 | return 1; | |
3298 | } | |
3299 | #else | |
3300 | #ifdef NEW_PROC_API | |
3301 | /* | |
3302 | * Unixware and Solaris 6 (and later) version | |
3303 | */ | |
004527cb AC |
3304 | static void |
3305 | do_closedir_cleanup (void *dir) | |
3306 | { | |
3307 | closedir (dir); | |
3308 | } | |
3309 | ||
c3f6f71d | 3310 | int |
fba45db2 | 3311 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3312 | { |
3313 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
3314 | struct dirent *direntry; | |
3315 | struct cleanup *old_chain = NULL; | |
3316 | procinfo *thread; | |
3317 | DIR *dirp; | |
3318 | int lwpid; | |
3319 | ||
3320 | /* | |
3321 | * We should never have to apply this operation to any procinfo | |
3322 | * except the one for the main process. If that ever changes | |
19958708 | 3323 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3324 | * replace it with one that makes sure the ctl_fd is open. |
3325 | */ | |
19958708 | 3326 | |
c3f6f71d JM |
3327 | if (pi->tid != 0) |
3328 | pi = find_procinfo_or_die (pi->pid, 0); | |
3329 | ||
3330 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3331 | ||
3332 | /* | |
3333 | * Unixware | |
3334 | * | |
19958708 RM |
3335 | * Note: this brute-force method is the only way I know of |
3336 | * to accomplish this task on Unixware. This method will | |
c3f6f71d JM |
3337 | * also work on Solaris 2.6 and 2.7. There is a much simpler |
3338 | * and more elegant way to do this on Solaris, but the margins | |
3339 | * of this manuscript are too small to write it here... ;-) | |
3340 | */ | |
3341 | ||
3342 | strcpy (pathname, pi->pathname); | |
3343 | strcat (pathname, "/lwp"); | |
3344 | if ((dirp = opendir (pathname)) == NULL) | |
3345 | proc_error (pi, "update_threads, opendir", __LINE__); | |
3346 | ||
004527cb | 3347 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
3348 | while ((direntry = readdir (dirp)) != NULL) |
3349 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
3350 | { | |
3351 | lwpid = atoi (&direntry->d_name[0]); | |
3352 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
3353 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
3354 | } | |
3355 | pi->threads_valid = 1; | |
3356 | do_cleanups (old_chain); | |
3357 | return 1; | |
3358 | } | |
3359 | #else | |
3360 | #ifdef PIOCTLIST | |
3361 | /* | |
3362 | * OSF version | |
3363 | */ | |
19958708 | 3364 | int |
fba45db2 | 3365 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3366 | { |
3367 | int nthreads, i; | |
3368 | tid_t *threads; | |
3369 | ||
3370 | /* | |
3371 | * We should never have to apply this operation to any procinfo | |
3372 | * except the one for the main process. If that ever changes | |
19958708 | 3373 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3374 | * replace it with one that makes sure the ctl_fd is open. |
3375 | */ | |
19958708 | 3376 | |
c3f6f71d JM |
3377 | if (pi->tid != 0) |
3378 | pi = find_procinfo_or_die (pi->pid, 0); | |
3379 | ||
3380 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
3381 | ||
3382 | nthreads = proc_get_nthreads (pi); | |
3383 | if (nthreads < 2) | |
3384 | return 0; /* nothing to do for 1 or fewer threads */ | |
3385 | ||
3c37485b | 3386 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 3387 | |
c3f6f71d JM |
3388 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
3389 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
3390 | ||
3391 | for (i = 0; i < nthreads; i++) | |
3392 | { | |
3393 | if (!find_procinfo (pi->pid, threads[i])) | |
3394 | if (!create_procinfo (pi->pid, threads[i])) | |
3395 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 3396 | } |
c3f6f71d JM |
3397 | pi->threads_valid = 1; |
3398 | return 1; | |
c906108c | 3399 | } |
c3f6f71d JM |
3400 | #else |
3401 | /* | |
3402 | * Default version | |
3403 | */ | |
3404 | int | |
fba45db2 | 3405 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
3406 | { |
3407 | return 0; | |
3408 | } | |
3409 | #endif /* OSF PIOCTLIST */ | |
3410 | #endif /* NEW_PROC_API */ | |
3411 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 3412 | |
c3f6f71d JM |
3413 | /* |
3414 | * Function: proc_iterate_over_threads | |
3415 | * | |
3416 | * Description: | |
3417 | * Given a pointer to a function, call that function once | |
3418 | * for each lwp in the procinfo list, until the function | |
3419 | * returns non-zero, in which event return the value | |
3420 | * returned by the function. | |
3421 | * | |
3422 | * Note: this function does NOT call update_threads. | |
3423 | * If you want to discover new threads first, you must | |
3424 | * call that function explicitly. This function just makes | |
19958708 RM |
3425 | * a quick pass over the currently-known procinfos. |
3426 | * | |
c3f6f71d JM |
3427 | * Arguments: |
3428 | * pi - parent process procinfo | |
3429 | * func - per-thread function | |
3430 | * ptr - opaque parameter for function. | |
3431 | * | |
3432 | * Return: | |
3433 | * First non-zero return value from the callee, or zero. | |
3434 | */ | |
3435 | ||
3436 | int | |
d0849a9a KB |
3437 | proc_iterate_over_threads (procinfo *pi, |
3438 | int (*func) (procinfo *, procinfo *, void *), | |
3439 | void *ptr) | |
c906108c | 3440 | { |
c3f6f71d JM |
3441 | procinfo *thread, *next; |
3442 | int retval = 0; | |
c906108c | 3443 | |
c3f6f71d JM |
3444 | /* |
3445 | * We should never have to apply this operation to any procinfo | |
3446 | * except the one for the main process. If that ever changes | |
19958708 | 3447 | * for any reason, then take out the following clause and |
c3f6f71d JM |
3448 | * replace it with one that makes sure the ctl_fd is open. |
3449 | */ | |
19958708 | 3450 | |
c3f6f71d JM |
3451 | if (pi->tid != 0) |
3452 | pi = find_procinfo_or_die (pi->pid, 0); | |
3453 | ||
3454 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 3455 | { |
c3f6f71d JM |
3456 | next = thread->next; /* in case thread is destroyed */ |
3457 | if ((retval = (*func) (pi, thread, ptr)) != 0) | |
3458 | break; | |
c906108c | 3459 | } |
c3f6f71d JM |
3460 | |
3461 | return retval; | |
c906108c SS |
3462 | } |
3463 | ||
c3f6f71d JM |
3464 | /* =================== END, Thread "MODULE" =================== */ |
3465 | ||
3466 | /* =================== END, /proc "MODULE" =================== */ | |
3467 | ||
3468 | /* =================== GDB "MODULE" =================== */ | |
3469 | ||
3470 | /* | |
3471 | * Here are all of the gdb target vector functions and their friends. | |
3472 | */ | |
3473 | ||
39f77062 | 3474 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 3475 | static void do_detach (int signo); |
37de36c6 | 3476 | static int register_gdb_signals (procinfo *, gdb_sigset_t *); |
9185ddce JB |
3477 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
3478 | int entry_or_exit, int mode, int from_tty); | |
9185ddce JB |
3479 | |
3480 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
3481 | the startup phase. The following two variables are used to record | |
3482 | the address of the breakpoint, and the code that was replaced by | |
3483 | a breakpoint. */ | |
3484 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 3485 | static void *dbx_link_bpt; |
c3f6f71d JM |
3486 | |
3487 | /* | |
3488 | * Function: procfs_debug_inferior | |
3489 | * | |
3490 | * Sets up the inferior to be debugged. | |
3491 | * Registers to trace signals, hardware faults, and syscalls. | |
3492 | * Note: does not set RLC flag: caller may want to customize that. | |
3493 | * | |
3494 | * Returns: zero for success (note! unlike most functions in this module) | |
3495 | * On failure, returns the LINE NUMBER where it failed! | |
3496 | */ | |
3497 | ||
3498 | static int | |
fba45db2 | 3499 | procfs_debug_inferior (procinfo *pi) |
c906108c | 3500 | { |
c3f6f71d | 3501 | fltset_t traced_faults; |
37de36c6 KB |
3502 | gdb_sigset_t traced_signals; |
3503 | sysset_t *traced_syscall_entries; | |
3504 | sysset_t *traced_syscall_exits; | |
3505 | int status; | |
c906108c | 3506 | |
c3f6f71d JM |
3507 | #ifdef PROCFS_DONT_TRACE_FAULTS |
3508 | /* On some systems (OSF), we don't trace hardware faults. | |
3509 | Apparently it's enough that we catch them as signals. | |
3510 | Wonder why we don't just do that in general? */ | |
3511 | premptyset (&traced_faults); /* don't trace faults. */ | |
3512 | #else | |
3513 | /* Register to trace hardware faults in the child. */ | |
3514 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 3515 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
3516 | #endif |
3517 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
3518 | return __LINE__; | |
c906108c | 3519 | |
c3f6f71d JM |
3520 | /* Register to trace selected signals in the child. */ |
3521 | premptyset (&traced_signals); | |
3522 | if (!register_gdb_signals (pi, &traced_signals)) | |
3523 | return __LINE__; | |
3524 | ||
37de36c6 | 3525 | |
c3f6f71d | 3526 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
3527 | traced_syscall_entries = sysset_t_alloc (pi); |
3528 | gdb_premptysysset (traced_syscall_entries); | |
3529 | #ifdef SYS_exit | |
3530 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
3531 | #endif | |
c3f6f71d | 3532 | #ifdef SYS_lwpexit |
37de36c6 | 3533 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit); /* And _lwp_exit... */ |
c3f6f71d JM |
3534 | #endif |
3535 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
3536 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
3537 | #endif | |
3538 | #ifdef DYNAMIC_SYSCALLS | |
3539 | { | |
3540 | int callnum = find_syscall (pi, "_exit"); | |
3541 | if (callnum >= 0) | |
3542 | gdb_praddsysset (traced_syscall_entries, callnum); | |
3543 | } | |
c906108c SS |
3544 | #endif |
3545 | ||
37de36c6 KB |
3546 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
3547 | xfree (traced_syscall_entries); | |
3548 | if (!status) | |
c3f6f71d JM |
3549 | return __LINE__; |
3550 | ||
3551 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
3552 | /* OSF method for tracing exec syscalls. Quoting: | |
3553 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
3554 | exits from exec system calls because of the user level loader. */ | |
3555 | /* FIXME: make nice and maybe move into an access function. */ | |
3556 | { | |
3557 | int prfs_flags; | |
3558 | ||
3559 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
3560 | return __LINE__; | |
3561 | ||
3562 | prfs_flags |= PRFS_STOPEXEC; | |
3563 | ||
3564 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
3565 | return __LINE__; | |
3566 | } | |
3567 | #else /* not PRFS_STOPEXEC */ | |
3568 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
3569 | /* GW: Rationale... | |
3570 | Not all systems with /proc have all the exec* syscalls with the same | |
3571 | names. On the SGI, for example, there is no SYS_exec, but there | |
3572 | *is* a SYS_execv. So, we try to account for that. */ | |
3573 | ||
37de36c6 KB |
3574 | traced_syscall_exits = sysset_t_alloc (pi); |
3575 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3576 | #ifdef SYS_exec |
37de36c6 | 3577 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3578 | #endif |
3579 | #ifdef SYS_execve | |
37de36c6 | 3580 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3581 | #endif |
3582 | #ifdef SYS_execv | |
37de36c6 | 3583 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3584 | #endif |
c5aa993b | 3585 | |
c3f6f71d | 3586 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3587 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3588 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3589 | #endif |
c5aa993b | 3590 | |
c3f6f71d | 3591 | #ifdef SYS_lwp_create /* FIXME: once only, please */ |
37de36c6 KB |
3592 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3593 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3594 | #endif |
c5aa993b | 3595 | |
37de36c6 KB |
3596 | #ifdef DYNAMIC_SYSCALLS |
3597 | { | |
3598 | int callnum = find_syscall (pi, "execve"); | |
3599 | if (callnum >= 0) | |
3600 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3601 | callnum = find_syscall (pi, "ra_execve"); | |
3602 | if (callnum >= 0) | |
3603 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3604 | } | |
3605 | #endif | |
c906108c | 3606 | |
37de36c6 KB |
3607 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3608 | xfree (traced_syscall_exits); | |
3609 | if (!status) | |
c3f6f71d JM |
3610 | return __LINE__; |
3611 | ||
3612 | #endif /* PRFS_STOPEXEC */ | |
3613 | return 0; | |
c906108c SS |
3614 | } |
3615 | ||
19958708 | 3616 | static void |
136d6dae | 3617 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3618 | { |
c3f6f71d JM |
3619 | char *exec_file; |
3620 | int pid; | |
3621 | ||
74164c56 | 3622 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3623 | |
c3f6f71d | 3624 | if (pid == getpid ()) |
8a3fe4f8 | 3625 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3626 | |
c3f6f71d | 3627 | if (from_tty) |
c906108c | 3628 | { |
c3f6f71d JM |
3629 | exec_file = get_exec_file (0); |
3630 | ||
3631 | if (exec_file) | |
a3f17187 | 3632 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3633 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3634 | else |
a3f17187 | 3635 | printf_filtered (_("Attaching to %s\n"), |
39f77062 | 3636 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3637 | |
3638 | fflush (stdout); | |
c906108c | 3639 | } |
39f77062 | 3640 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3641 | push_target (ops); |
c3f6f71d JM |
3642 | } |
3643 | ||
19958708 | 3644 | static void |
136d6dae | 3645 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3646 | { |
cc377e6b | 3647 | int sig = 0; |
7f9f62ba | 3648 | int pid = PIDGET (inferior_ptid); |
cc377e6b MK |
3649 | |
3650 | if (args) | |
3651 | sig = atoi (args); | |
c3f6f71d JM |
3652 | |
3653 | if (from_tty) | |
c906108c | 3654 | { |
cc377e6b MK |
3655 | char *exec_file; |
3656 | ||
c3f6f71d | 3657 | exec_file = get_exec_file (0); |
cc377e6b | 3658 | if (exec_file == NULL) |
c3f6f71d | 3659 | exec_file = ""; |
cc377e6b | 3660 | |
a3f17187 | 3661 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3662 | target_pid_to_str (pid_to_ptid (pid))); |
3663 | gdb_flush (gdb_stdout); | |
c906108c | 3664 | } |
19958708 | 3665 | |
cc377e6b MK |
3666 | do_detach (sig); |
3667 | ||
39f77062 | 3668 | inferior_ptid = null_ptid; |
7f9f62ba | 3669 | detach_inferior (pid); |
28439f5e | 3670 | unpush_target (ops); |
c906108c SS |
3671 | } |
3672 | ||
39f77062 KB |
3673 | static ptid_t |
3674 | do_attach (ptid_t ptid) | |
c906108c | 3675 | { |
c3f6f71d | 3676 | procinfo *pi; |
181e7f93 | 3677 | struct inferior *inf; |
c3f6f71d | 3678 | int fail; |
2689673f | 3679 | int lwpid; |
c3f6f71d | 3680 | |
39f77062 | 3681 | if ((pi = create_procinfo (PIDGET (ptid), 0)) == NULL) |
8a3fe4f8 | 3682 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3683 | |
3684 | if (!open_procinfo_files (pi, FD_CTL)) | |
3685 | { | |
3686 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3687 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
39f77062 | 3688 | PIDGET (ptid)); |
c3f6f71d JM |
3689 | dead_procinfo (pi, errmsg, NOKILL); |
3690 | } | |
c906108c | 3691 | |
c3f6f71d JM |
3692 | /* Stop the process (if it isn't already stopped). */ |
3693 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3694 | { |
c3f6f71d JM |
3695 | pi->was_stopped = 1; |
3696 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3697 | } |
3698 | else | |
3699 | { | |
c3f6f71d JM |
3700 | pi->was_stopped = 0; |
3701 | /* Set the process to run again when we close it. */ | |
3702 | if (!proc_set_run_on_last_close (pi)) | |
3703 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3704 | ||
3705 | /* Now stop the process. */ | |
3706 | if (!proc_stop_process (pi)) | |
3707 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3708 | pi->ignore_next_sigstop = 1; | |
c906108c | 3709 | } |
c3f6f71d JM |
3710 | /* Save some of the /proc state to be restored if we detach. */ |
3711 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3712 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3713 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3714 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3715 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3716 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3717 | NOKILL); | |
37de36c6 | 3718 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3719 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3720 | NOKILL); |
3721 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3722 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3723 | ||
3724 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3725 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3726 | ||
6c95b8df PA |
3727 | inf = current_inferior (); |
3728 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3729 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3730 | inf->attach_flag = 1; |
2689673f PA |
3731 | |
3732 | /* Create a procinfo for the current lwp. */ | |
3733 | lwpid = proc_get_current_thread (pi); | |
3734 | create_procinfo (pi->pid, lwpid); | |
3735 | ||
3736 | /* Add it to gdb's thread list. */ | |
3737 | ptid = MERGEPID (pi->pid, lwpid); | |
3738 | add_thread (ptid); | |
3739 | ||
3740 | return ptid; | |
c906108c SS |
3741 | } |
3742 | ||
3743 | static void | |
fba45db2 | 3744 | do_detach (int signo) |
c906108c | 3745 | { |
c3f6f71d | 3746 | procinfo *pi; |
c906108c | 3747 | |
c3f6f71d | 3748 | /* Find procinfo for the main process */ |
39f77062 | 3749 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); /* FIXME: threads */ |
c3f6f71d JM |
3750 | if (signo) |
3751 | if (!proc_set_current_signal (pi, signo)) | |
3752 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3753 | |
c3f6f71d JM |
3754 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3755 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3756 | |
c3f6f71d JM |
3757 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3758 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3759 | ||
37de36c6 | 3760 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3761 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3762 | ||
37de36c6 | 3763 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3764 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3765 | ||
3766 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3767 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3768 | ||
3769 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3770 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3771 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3772 | { |
3773 | /* Clear any pending signal. */ | |
3774 | if (!proc_clear_current_fault (pi)) | |
3775 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3776 | ||
1a303dec MS |
3777 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3778 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3779 | ||
c3f6f71d JM |
3780 | if (!proc_set_run_on_last_close (pi)) |
3781 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3782 | } | |
3783 | ||
c3f6f71d | 3784 | destroy_procinfo (pi); |
c906108c SS |
3785 | } |
3786 | ||
772cf8be MK |
3787 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3788 | for all registers. | |
3789 | ||
3790 | ??? Is the following note still relevant? We can't get individual | |
3791 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3792 | don't bother with caching at all in that case. | |
3793 | ||
3794 | NOTE: Since the /proc interface cannot give us individual | |
3795 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3796 | This results in the possibility that we will do unnecessarily many | |
3797 | fetches, since we may be called repeatedly for individual | |
3798 | registers. So we cache the results, and mark the cache invalid | |
3799 | when the process is resumed. */ | |
c3f6f71d | 3800 | |
c906108c | 3801 | static void |
28439f5e PA |
3802 | procfs_fetch_registers (struct target_ops *ops, |
3803 | struct regcache *regcache, int regnum) | |
c906108c | 3804 | { |
772cf8be MK |
3805 | gdb_gregset_t *gregs; |
3806 | procinfo *pi; | |
3807 | int pid = PIDGET (inferior_ptid); | |
3808 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3809 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3810 | |
2689673f | 3811 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3812 | |
3813 | if (pi == NULL) | |
8a3fe4f8 | 3814 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3815 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3816 | |
772cf8be MK |
3817 | gregs = proc_get_gregs (pi); |
3818 | if (gregs == NULL) | |
c3f6f71d JM |
3819 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3820 | ||
56be3814 | 3821 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3822 | |
40a6adc1 | 3823 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3824 | { |
772cf8be MK |
3825 | gdb_fpregset_t *fpregs; |
3826 | ||
40a6adc1 MD |
3827 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3828 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3829 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3830 | return; /* Not a floating point register. */ |
c5aa993b | 3831 | |
772cf8be MK |
3832 | fpregs = proc_get_fpregs (pi); |
3833 | if (fpregs == NULL) | |
60054393 | 3834 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3835 | |
56be3814 | 3836 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3837 | } |
c906108c SS |
3838 | } |
3839 | ||
772cf8be MK |
3840 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3841 | this for all registers. | |
3842 | ||
3843 | NOTE: Since the /proc interface will not read individual registers, | |
3844 | we will cache these requests until the process is resumed, and only | |
3845 | then write them back to the inferior process. | |
3846 | ||
3847 | FIXME: is that a really bad idea? Have to think about cases where | |
3848 | writing one register might affect the value of others, etc. */ | |
c906108c | 3849 | |
c3f6f71d | 3850 | static void |
28439f5e PA |
3851 | procfs_store_registers (struct target_ops *ops, |
3852 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3853 | { |
772cf8be MK |
3854 | gdb_gregset_t *gregs; |
3855 | procinfo *pi; | |
3856 | int pid = PIDGET (inferior_ptid); | |
3857 | int tid = TIDGET (inferior_ptid); | |
40a6adc1 | 3858 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3859 | |
2689673f | 3860 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3861 | |
3862 | if (pi == NULL) | |
8a3fe4f8 | 3863 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3864 | target_pid_to_str (inferior_ptid)); |
c906108c | 3865 | |
772cf8be MK |
3866 | gregs = proc_get_gregs (pi); |
3867 | if (gregs == NULL) | |
c3f6f71d | 3868 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3869 | |
56be3814 | 3870 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3871 | if (!proc_set_gregs (pi)) |
3872 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3873 | |
40a6adc1 | 3874 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3875 | { |
772cf8be MK |
3876 | gdb_fpregset_t *fpregs; |
3877 | ||
40a6adc1 MD |
3878 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3879 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3880 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3881 | return; /* Not a floating point register. */ |
60054393 | 3882 | |
772cf8be MK |
3883 | fpregs = proc_get_fpregs (pi); |
3884 | if (fpregs == NULL) | |
60054393 MS |
3885 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3886 | ||
56be3814 | 3887 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3888 | if (!proc_set_fpregs (pi)) |
3889 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3890 | } | |
c3f6f71d | 3891 | } |
c906108c | 3892 | |
37de36c6 KB |
3893 | static int |
3894 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3895 | { | |
3896 | ||
3897 | #ifdef SYS_lwp_exit | |
3898 | if (scall == SYS_lwp_exit) | |
3899 | return 1; | |
3900 | #endif | |
3901 | #ifdef SYS_lwpexit | |
3902 | if (scall == SYS_lwpexit) | |
3903 | return 1; | |
3904 | #endif | |
3905 | return 0; | |
3906 | } | |
3907 | ||
3908 | static int | |
3909 | syscall_is_exit (procinfo *pi, int scall) | |
3910 | { | |
3911 | #ifdef SYS_exit | |
3912 | if (scall == SYS_exit) | |
3913 | return 1; | |
3914 | #endif | |
3915 | #ifdef DYNAMIC_SYSCALLS | |
3916 | if (find_syscall (pi, "_exit") == scall) | |
3917 | return 1; | |
3918 | #endif | |
3919 | return 0; | |
3920 | } | |
3921 | ||
3922 | static int | |
3923 | syscall_is_exec (procinfo *pi, int scall) | |
3924 | { | |
3925 | #ifdef SYS_exec | |
3926 | if (scall == SYS_exec) | |
3927 | return 1; | |
3928 | #endif | |
3929 | #ifdef SYS_execv | |
3930 | if (scall == SYS_execv) | |
3931 | return 1; | |
3932 | #endif | |
3933 | #ifdef SYS_execve | |
3934 | if (scall == SYS_execve) | |
3935 | return 1; | |
3936 | #endif | |
3937 | #ifdef DYNAMIC_SYSCALLS | |
3938 | if (find_syscall (pi, "_execve")) | |
3939 | return 1; | |
3940 | if (find_syscall (pi, "ra_execve")) | |
3941 | return 1; | |
3942 | #endif | |
3943 | return 0; | |
3944 | } | |
3945 | ||
3946 | static int | |
3947 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3948 | { | |
3949 | #ifdef SYS_lwp_create | |
3950 | if (scall == SYS_lwp_create) | |
3951 | return 1; | |
3952 | #endif | |
3953 | #ifdef SYS_lwpcreate | |
3954 | if (scall == SYS_lwpcreate) | |
3955 | return 1; | |
3956 | #endif | |
3957 | return 0; | |
3958 | } | |
3959 | ||
7434dadd JB |
3960 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3961 | Does nothing if the breakpoint hasn't been inserted or has already | |
3962 | been removed. */ | |
3963 | ||
3964 | static void | |
3965 | remove_dbx_link_breakpoint (void) | |
3966 | { | |
3967 | if (dbx_link_bpt_addr == 0) | |
3968 | return; | |
3969 | ||
3970 | if (deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt) != 0) | |
3971 | warning (_("Unable to remove __dbx_link breakpoint.")); | |
3972 | ||
3973 | dbx_link_bpt_addr = 0; | |
3974 | dbx_link_bpt = NULL; | |
3975 | } | |
3976 | ||
3977 | #ifdef SYS_syssgi | |
3978 | /* Return the address of the __dbx_link() function in the file | |
3979 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3980 | the symbol was not found. */ | |
3981 | ||
3982 | static CORE_ADDR | |
3983 | dbx_link_addr (bfd *abfd) | |
3984 | { | |
3985 | long storage_needed; | |
3986 | asymbol **symbol_table; | |
3987 | long number_of_symbols; | |
3988 | long i; | |
3989 | ||
3990 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3991 | if (storage_needed <= 0) | |
3992 | return 0; | |
3993 | ||
3994 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3995 | make_cleanup (xfree, symbol_table); | |
3996 | ||
3997 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3998 | ||
3999 | for (i = 0; i < number_of_symbols; i++) | |
4000 | { | |
4001 | asymbol *sym = symbol_table[i]; | |
4002 | ||
4003 | if ((sym->flags & BSF_GLOBAL) | |
4004 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) | |
4005 | return (sym->value + sym->section->vma); | |
4006 | } | |
4007 | ||
4008 | /* Symbol not found, return NULL. */ | |
4009 | return 0; | |
4010 | } | |
4011 | ||
4012 | /* Search the symbol table of the file referenced by FD for a symbol | |
4013 | named __dbx_link(). If found, then insert a breakpoint at this location, | |
4014 | and return nonzero. Return zero otherwise. */ | |
4015 | ||
4016 | static int | |
4017 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
4018 | { | |
4019 | bfd *abfd; | |
4020 | long storage_needed; | |
4021 | CORE_ADDR sym_addr; | |
4022 | ||
4023 | abfd = bfd_fdopenr ("unamed", 0, fd); | |
4024 | if (abfd == NULL) | |
4025 | { | |
4026 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
4027 | return 0; | |
4028 | } | |
4029 | ||
4030 | if (!bfd_check_format (abfd, bfd_object)) | |
4031 | { | |
4032 | /* Not the correct format, so we can not possibly find the dbx_link | |
4033 | symbol in it. */ | |
4034 | bfd_close (abfd); | |
4035 | return 0; | |
4036 | } | |
4037 | ||
4038 | sym_addr = dbx_link_addr (abfd); | |
4039 | if (sym_addr != 0) | |
4040 | { | |
4041 | /* Insert the breakpoint. */ | |
4042 | dbx_link_bpt_addr = sym_addr; | |
4043 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch, NULL, | |
4044 | sym_addr); | |
4045 | if (dbx_link_bpt == NULL) | |
4046 | { | |
4047 | warning (_("Failed to insert dbx_link breakpoint.")); | |
4048 | bfd_close (abfd); | |
4049 | return 0; | |
4050 | } | |
4051 | bfd_close (abfd); | |
4052 | return 1; | |
4053 | } | |
4054 | ||
4055 | bfd_close (abfd); | |
4056 | return 0; | |
4057 | } | |
4058 | ||
e294797a JB |
4059 | /* Calls the supplied callback function once for each mapped address |
4060 | space in the process. The callback function receives an open | |
4061 | file descriptor for the file corresponding to that mapped | |
4062 | address space (if there is one), and the base address of the | |
4063 | mapped space. Quit when the callback function returns a | |
4064 | nonzero value, or at teh end of the mappings. | |
4065 | ||
4066 | Returns: the first non-zero return value of the callback function, | |
4067 | or zero. */ | |
4068 | ||
4069 | static int | |
4070 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
4071 | void *data) | |
4072 | { | |
4073 | procinfo *pi = data; | |
4074 | int fd; | |
4075 | ||
4076 | #ifdef NEW_PROC_API | |
4077 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
4078 | ||
4079 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
4080 | return -1; /* sanity */ | |
4081 | ||
4082 | if (map->pr_mapname[0] == 0) | |
4083 | { | |
4084 | fd = -1; /* no map file */ | |
4085 | } | |
4086 | else | |
4087 | { | |
4088 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
4089 | /* Note: caller's responsibility to close this fd! */ | |
4090 | fd = open_with_retry (name, O_RDONLY); | |
4091 | /* Note: we don't test the above call for failure; | |
4092 | we just pass the FD on as given. Sometimes there is | |
4093 | no file, so the open may return failure, but that's | |
4094 | not a problem. */ | |
4095 | } | |
4096 | #else | |
4097 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
4098 | /* Note: we don't test the above call for failure; | |
4099 | we just pass the FD on as given. Sometimes there is | |
4100 | no file, so the ioctl may return failure, but that's | |
4101 | not a problem. */ | |
4102 | #endif | |
4103 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
4104 | } | |
4105 | ||
7434dadd JB |
4106 | /* If the given memory region MAP contains a symbol named __dbx_link, |
4107 | insert a breakpoint at this location and return nonzero. Return | |
4108 | zero otherwise. */ | |
4109 | ||
4110 | static int | |
4111 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
e9ef4f39 | 4112 | iterate_over_mappings_cb_ftype *child_func, |
7434dadd JB |
4113 | void *data) |
4114 | { | |
4115 | procinfo *pi = (procinfo *) data; | |
4116 | ||
4117 | /* We know the symbol we're looking for is in a text region, so | |
4118 | only look for it if the region is a text one. */ | |
4119 | if (map->pr_mflags & MA_EXEC) | |
4120 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
4121 | ||
4122 | return 0; | |
4123 | } | |
4124 | ||
4125 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
4126 | insert a breakpoint at its location, and return nonzero. Return zero | |
4127 | otherwise. */ | |
4128 | ||
4129 | static int | |
4130 | insert_dbx_link_breakpoint (procinfo *pi) | |
4131 | { | |
4132 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
4133 | } | |
4134 | #endif | |
4135 | ||
c3f6f71d JM |
4136 | /* |
4137 | * Function: target_wait | |
4138 | * | |
4139 | * Retrieve the next stop event from the child process. | |
4140 | * If child has not stopped yet, wait for it to stop. | |
4141 | * Translate /proc eventcodes (or possibly wait eventcodes) | |
4142 | * into gdb internal event codes. | |
4143 | * | |
4144 | * Return: id of process (and possibly thread) that incurred the event. | |
4145 | * event codes are returned thru a pointer parameter. | |
c906108c SS |
4146 | */ |
4147 | ||
39f77062 | 4148 | static ptid_t |
117de6a9 | 4149 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 4150 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 4151 | { |
c3f6f71d JM |
4152 | /* First cut: loosely based on original version 2.1 */ |
4153 | procinfo *pi; | |
39f77062 KB |
4154 | int wstat; |
4155 | int temp_tid; | |
4156 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
4157 | int why, what, flags; |
4158 | int retry = 0; | |
c906108c | 4159 | |
c3f6f71d | 4160 | wait_again: |
c906108c | 4161 | |
c3f6f71d JM |
4162 | retry++; |
4163 | wstat = 0; | |
39f77062 | 4164 | retval = pid_to_ptid (-1); |
c906108c | 4165 | |
c3f6f71d | 4166 | /* Find procinfo for main process */ |
39f77062 | 4167 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d | 4168 | if (pi) |
c906108c | 4169 | { |
c3f6f71d JM |
4170 | /* We must assume that the status is stale now... */ |
4171 | pi->status_valid = 0; | |
4172 | pi->gregs_valid = 0; | |
4173 | pi->fpregs_valid = 0; | |
4174 | ||
4175 | #if 0 /* just try this out... */ | |
4176 | flags = proc_flags (pi); | |
4177 | why = proc_why (pi); | |
4178 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
4179 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ | |
4180 | #endif | |
4181 | /* If child is not stopped, wait for it to stop. */ | |
4182 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
4183 | !proc_wait_for_stop (pi)) | |
c906108c | 4184 | { |
c3f6f71d JM |
4185 | /* wait_for_stop failed: has the child terminated? */ |
4186 | if (errno == ENOENT) | |
c906108c | 4187 | { |
39f77062 KB |
4188 | int wait_retval; |
4189 | ||
c3f6f71d | 4190 | /* /proc file not found; presumably child has terminated. */ |
39f77062 | 4191 | wait_retval = wait (&wstat); /* "wait" for the child's exit */ |
c3f6f71d | 4192 | |
39f77062 | 4193 | if (wait_retval != PIDGET (inferior_ptid)) /* wrong child? */ |
8a3fe4f8 | 4194 | error (_("procfs: couldn't stop process %d: wait returned %d."), |
39f77062 | 4195 | PIDGET (inferior_ptid), wait_retval); |
c3f6f71d JM |
4196 | /* FIXME: might I not just use waitpid? |
4197 | Or try find_procinfo to see if I know about this child? */ | |
39f77062 | 4198 | retval = pid_to_ptid (wait_retval); |
c906108c | 4199 | } |
d1566ff5 FN |
4200 | else if (errno == EINTR) |
4201 | goto wait_again; | |
c3f6f71d | 4202 | else |
c906108c | 4203 | { |
c3f6f71d JM |
4204 | /* Unknown error from wait_for_stop. */ |
4205 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); | |
c906108c | 4206 | } |
c3f6f71d JM |
4207 | } |
4208 | else | |
4209 | { | |
4210 | /* This long block is reached if either: | |
4211 | a) the child was already stopped, or | |
4212 | b) we successfully waited for the child with wait_for_stop. | |
4213 | This block will analyze the /proc status, and translate it | |
4214 | into a waitstatus for GDB. | |
4215 | ||
4216 | If we actually had to call wait because the /proc file | |
19958708 | 4217 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
4218 | because we already have a waitstatus. */ |
4219 | ||
4220 | flags = proc_flags (pi); | |
4221 | why = proc_why (pi); | |
4222 | what = proc_what (pi); | |
4223 | ||
c3f6f71d | 4224 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4225 | { |
c3f6f71d JM |
4226 | #ifdef PR_ASYNC |
4227 | /* If it's running async (for single_thread control), | |
4228 | set it back to normal again. */ | |
4229 | if (flags & PR_ASYNC) | |
4230 | if (!proc_unset_async (pi)) | |
4231 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
4232 | #endif | |
4233 | ||
4234 | if (info_verbose) | |
4235 | proc_prettyprint_why (why, what, 1); | |
4236 | ||
4237 | /* The 'pid' we will return to GDB is composed of | |
4238 | the process ID plus the lwp ID. */ | |
4239 | retval = MERGEPID (pi->pid, proc_get_current_thread (pi)); | |
4240 | ||
4241 | switch (why) { | |
4242 | case PR_SIGNALLED: | |
4243 | wstat = (what << 8) | 0177; | |
4244 | break; | |
4245 | case PR_SYSENTRY: | |
37de36c6 | 4246 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 4247 | { |
17faa917 DJ |
4248 | if (print_thread_events) |
4249 | printf_unfiltered (_("[%s exited]\n"), | |
4250 | target_pid_to_str (retval)); | |
37de36c6 KB |
4251 | delete_thread (retval); |
4252 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4253 | return retval; | |
4254 | } | |
4255 | else if (syscall_is_exit (pi, what)) | |
4256 | { | |
181e7f93 PA |
4257 | struct inferior *inf; |
4258 | ||
37de36c6 KB |
4259 | /* Handle SYS_exit call only */ |
4260 | /* Stopped at entry to SYS_exit. | |
19958708 | 4261 | Make it runnable, resume it, then use |
37de36c6 | 4262 | the wait system call to get its exit code. |
19958708 | 4263 | Proc_run_process always clears the current |
37de36c6 KB |
4264 | fault and signal. |
4265 | Then return its exit status. */ | |
4266 | pi->status_valid = 0; | |
4267 | wstat = 0; | |
19958708 | 4268 | /* FIXME: what we should do is return |
37de36c6 KB |
4269 | TARGET_WAITKIND_SPURIOUS. */ |
4270 | if (!proc_run_process (pi, 0, 0)) | |
4271 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
4272 | |
4273 | inf = find_inferior_pid (pi->pid); | |
4274 | if (inf->attach_flag) | |
c3f6f71d | 4275 | { |
19958708 | 4276 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
4277 | return a "success" exit code. Bogus: what if |
4278 | it returns something else? */ | |
4279 | wstat = 0; | |
39f77062 | 4280 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
4281 | } |
4282 | else | |
4283 | { | |
4284 | int temp = wait (&wstat); | |
4285 | ||
4286 | /* FIXME: shouldn't I make sure I get the right | |
4287 | event from the right process? If (for | |
4288 | instance) I have killed an earlier inferior | |
4289 | process but failed to clean up after it | |
4290 | somehow, I could get its termination event | |
4291 | here. */ | |
4292 | ||
4293 | /* If wait returns -1, that's what we return to GDB. */ | |
4294 | if (temp < 0) | |
39f77062 | 4295 | retval = pid_to_ptid (temp); |
c3f6f71d | 4296 | } |
c3f6f71d | 4297 | } |
37de36c6 KB |
4298 | else |
4299 | { | |
a3f17187 | 4300 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
4301 | proc_prettyprint_syscall (proc_what (pi), 0); |
4302 | printf_filtered ("\n"); | |
4303 | #ifndef PIOCSSPCACT | |
c3f6f71d | 4304 | { |
37de36c6 | 4305 | long i, nsysargs, *sysargs; |
c3f6f71d | 4306 | |
37de36c6 KB |
4307 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
4308 | (sysargs = proc_sysargs (pi)) != NULL) | |
4309 | { | |
a3f17187 | 4310 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4311 | for (i = 0; i < nsysargs; i++) |
19958708 | 4312 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4313 | i, sysargs[i]); |
4314 | } | |
c3f6f71d | 4315 | |
c3f6f71d | 4316 | } |
c3f6f71d | 4317 | #endif |
37de36c6 KB |
4318 | if (status) |
4319 | { | |
4320 | /* How to exit gracefully, returning "unknown event" */ | |
4321 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4322 | return inferior_ptid; |
37de36c6 KB |
4323 | } |
4324 | else | |
4325 | { | |
4326 | /* How to keep going without returning to wfi: */ | |
39f77062 | 4327 | target_resume (ptid, 0, TARGET_SIGNAL_0); |
37de36c6 KB |
4328 | goto wait_again; |
4329 | } | |
4330 | } | |
4331 | break; | |
4332 | case PR_SYSEXIT: | |
4333 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 4334 | { |
37de36c6 KB |
4335 | /* Hopefully this is our own "fork-child" execing |
4336 | the real child. Hoax this event into a trap, and | |
4337 | GDB will see the child about to execute its start | |
4338 | address. */ | |
4339 | wstat = (SIGTRAP << 8) | 0177; | |
4340 | } | |
9185ddce JB |
4341 | #ifdef SYS_syssgi |
4342 | else if (what == SYS_syssgi) | |
4343 | { | |
4344 | /* see if we can break on dbx_link(). If yes, then | |
4345 | we no longer need the SYS_syssgi notifications. */ | |
4346 | if (insert_dbx_link_breakpoint (pi)) | |
4347 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
4348 | FLAG_RESET, 0); | |
4349 | ||
4350 | /* This is an internal event and should be transparent | |
4351 | to wfi, so resume the execution and wait again. See | |
4352 | comment in procfs_init_inferior() for more details. */ | |
4353 | target_resume (ptid, 0, TARGET_SIGNAL_0); | |
4354 | goto wait_again; | |
4355 | } | |
4356 | #endif | |
37de36c6 KB |
4357 | else if (syscall_is_lwp_create (pi, what)) |
4358 | { | |
4359 | /* | |
4360 | * This syscall is somewhat like fork/exec. | |
4361 | * We will get the event twice: once for the parent LWP, | |
4362 | * and once for the child. We should already know about | |
4363 | * the parent LWP, but the child will be new to us. So, | |
4364 | * whenever we get this event, if it represents a new | |
4365 | * thread, simply add the thread to the list. | |
4366 | */ | |
c3f6f71d | 4367 | |
37de36c6 | 4368 | /* If not in procinfo list, add it. */ |
39f77062 KB |
4369 | temp_tid = proc_get_current_thread (pi); |
4370 | if (!find_procinfo (pi->pid, temp_tid)) | |
4371 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 4372 | |
39f77062 | 4373 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
37de36c6 | 4374 | /* If not in GDB's thread list, add it. */ |
39f77062 | 4375 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
4376 | add_thread (temp_ptid); |
4377 | ||
37de36c6 KB |
4378 | /* Return to WFI, but tell it to immediately resume. */ |
4379 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
39f77062 | 4380 | return inferior_ptid; |
37de36c6 KB |
4381 | } |
4382 | else if (syscall_is_lwp_exit (pi, what)) | |
4383 | { | |
17faa917 DJ |
4384 | if (print_thread_events) |
4385 | printf_unfiltered (_("[%s exited]\n"), | |
4386 | target_pid_to_str (retval)); | |
37de36c6 KB |
4387 | delete_thread (retval); |
4388 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
4389 | return retval; | |
c3f6f71d | 4390 | } |
37de36c6 KB |
4391 | else if (0) |
4392 | { | |
4393 | /* FIXME: Do we need to handle SYS_sproc, | |
4394 | SYS_fork, or SYS_vfork here? The old procfs | |
4395 | seemed to use this event to handle threads on | |
4396 | older (non-LWP) systems, where I'm assuming | |
19958708 | 4397 | that threads were actually separate processes. |
37de36c6 KB |
4398 | Irix, maybe? Anyway, low priority for now. */ |
4399 | } | |
4400 | else | |
4401 | { | |
a3f17187 | 4402 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
4403 | proc_prettyprint_syscall (proc_what (pi), 0); |
4404 | printf_filtered ("\n"); | |
4405 | #ifndef PIOCSSPCACT | |
4406 | { | |
4407 | long i, nsysargs, *sysargs; | |
4408 | ||
4409 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
4410 | (sysargs = proc_sysargs (pi)) != NULL) | |
4411 | { | |
a3f17187 | 4412 | printf_filtered (_("%ld syscall arguments:\n"), nsysargs); |
37de36c6 | 4413 | for (i = 0; i < nsysargs; i++) |
19958708 | 4414 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
4415 | i, sysargs[i]); |
4416 | } | |
4417 | } | |
c3f6f71d | 4418 | #endif |
37de36c6 | 4419 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 4420 | return inferior_ptid; |
37de36c6 | 4421 | } |
c3f6f71d JM |
4422 | break; |
4423 | case PR_REQUESTED: | |
4424 | #if 0 /* FIXME */ | |
4425 | wstat = (SIGSTOP << 8) | 0177; | |
4426 | break; | |
4427 | #else | |
4428 | if (retry < 5) | |
4429 | { | |
a3f17187 | 4430 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
4431 | pi->status_valid = 0; |
4432 | goto wait_again; | |
4433 | } | |
4434 | else | |
4435 | { | |
4436 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
4437 | temp_tid = proc_get_current_thread (pi); |
4438 | if (!find_procinfo (pi->pid, temp_tid)) | |
4439 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
4440 | |
4441 | /* If not in GDB's thread list, add it. */ | |
39f77062 KB |
4442 | temp_ptid = MERGEPID (pi->pid, temp_tid); |
4443 | if (!in_thread_list (temp_ptid)) | |
93815fbf | 4444 | add_thread (temp_ptid); |
c3f6f71d JM |
4445 | |
4446 | status->kind = TARGET_WAITKIND_STOPPED; | |
4447 | status->value.sig = 0; | |
4448 | return retval; | |
4449 | } | |
4450 | #endif | |
4451 | case PR_JOBCONTROL: | |
4452 | wstat = (what << 8) | 0177; | |
4453 | break; | |
4454 | case PR_FAULTED: | |
7af6341f | 4455 | switch (what) { |
c3f6f71d JM |
4456 | #ifdef FLTWATCH |
4457 | case FLTWATCH: | |
4458 | wstat = (SIGTRAP << 8) | 0177; | |
4459 | break; | |
4460 | #endif | |
4461 | #ifdef FLTKWATCH | |
4462 | case FLTKWATCH: | |
4463 | wstat = (SIGTRAP << 8) | 0177; | |
4464 | break; | |
4465 | #endif | |
4466 | /* FIXME: use si_signo where possible. */ | |
4467 | case FLTPRIV: | |
4468 | #if (FLTILL != FLTPRIV) /* avoid "duplicate case" error */ | |
4469 | case FLTILL: | |
4470 | #endif | |
4471 | wstat = (SIGILL << 8) | 0177; | |
4472 | break; | |
4473 | case FLTBPT: | |
4474 | #if (FLTTRACE != FLTBPT) /* avoid "duplicate case" error */ | |
4475 | case FLTTRACE: | |
4476 | #endif | |
9185ddce JB |
4477 | /* If we hit our __dbx_link() internal breakpoint, |
4478 | then remove it. See comments in procfs_init_inferior() | |
4479 | for more details. */ | |
4480 | if (dbx_link_bpt_addr != 0 | |
fb14de7b UW |
4481 | && dbx_link_bpt_addr |
4482 | == regcache_read_pc (get_current_regcache ())) | |
9185ddce JB |
4483 | remove_dbx_link_breakpoint (); |
4484 | ||
c3f6f71d JM |
4485 | wstat = (SIGTRAP << 8) | 0177; |
4486 | break; | |
4487 | case FLTSTACK: | |
4488 | case FLTACCESS: | |
4489 | #if (FLTBOUNDS != FLTSTACK) /* avoid "duplicate case" error */ | |
4490 | case FLTBOUNDS: | |
4491 | #endif | |
4492 | wstat = (SIGSEGV << 8) | 0177; | |
4493 | break; | |
4494 | case FLTIOVF: | |
4495 | case FLTIZDIV: | |
4496 | #if (FLTFPE != FLTIOVF) /* avoid "duplicate case" error */ | |
4497 | case FLTFPE: | |
4498 | #endif | |
4499 | wstat = (SIGFPE << 8) | 0177; | |
4500 | break; | |
4501 | case FLTPAGE: /* Recoverable page fault */ | |
4502 | default: /* FIXME: use si_signo if possible for fault */ | |
39f77062 | 4503 | retval = pid_to_ptid (-1); |
c3f6f71d | 4504 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 4505 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4506 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4507 | error (_("... giving up...")); |
c3f6f71d JM |
4508 | break; |
4509 | } | |
4510 | break; /* case PR_FAULTED: */ | |
4511 | default: /* switch (why) unmatched */ | |
4512 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 4513 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 4514 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 4515 | error (_("... giving up...")); |
c3f6f71d JM |
4516 | break; |
4517 | } | |
4518 | /* | |
4519 | * Got this far without error: | |
4520 | * If retval isn't in the threads database, add it. | |
4521 | */ | |
39f77062 KB |
4522 | if (PIDGET (retval) > 0 && |
4523 | !ptid_equal (retval, inferior_ptid) && | |
c3f6f71d | 4524 | !in_thread_list (retval)) |
c906108c | 4525 | { |
c3f6f71d | 4526 | /* |
19958708 | 4527 | * We have a new thread. |
c3f6f71d | 4528 | * We need to add it both to GDB's list and to our own. |
19958708 | 4529 | * If we don't create a procinfo, resume may be unhappy |
c3f6f71d JM |
4530 | * later. |
4531 | */ | |
c3f6f71d JM |
4532 | add_thread (retval); |
4533 | if (find_procinfo (PIDGET (retval), TIDGET (retval)) == NULL) | |
4534 | create_procinfo (PIDGET (retval), TIDGET (retval)); | |
c906108c | 4535 | } |
c906108c | 4536 | } |
c3f6f71d | 4537 | else /* flags do not indicate STOPPED */ |
c906108c | 4538 | { |
c3f6f71d JM |
4539 | /* surely this can't happen... */ |
4540 | printf_filtered ("procfs:%d -- process not stopped.\n", | |
4541 | __LINE__); | |
4542 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 4543 | error (_("procfs: ...giving up...")); |
c906108c | 4544 | } |
c906108c | 4545 | } |
c906108c | 4546 | |
c3f6f71d JM |
4547 | if (status) |
4548 | store_waitstatus (status, wstat); | |
c906108c SS |
4549 | } |
4550 | ||
c3f6f71d JM |
4551 | return retval; |
4552 | } | |
c906108c | 4553 | |
4e73f23d RM |
4554 | /* Perform a partial transfer to/from the specified object. For |
4555 | memory transfers, fall back to the old memory xfer functions. */ | |
4556 | ||
4557 | static LONGEST | |
4558 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
4559 | const char *annex, gdb_byte *readbuf, |
4560 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
4561 | { |
4562 | switch (object) | |
4563 | { | |
4564 | case TARGET_OBJECT_MEMORY: | |
4565 | if (readbuf) | |
0b62613e PA |
4566 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
4567 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 4568 | if (writebuf) |
0b62613e PA |
4569 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
4570 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
4571 | return -1; |
4572 | ||
4573 | #ifdef NEW_PROC_API | |
4574 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 4575 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4576 | offset, len); |
4577 | #endif | |
4578 | ||
4579 | default: | |
4580 | if (ops->beneath != NULL) | |
4581 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4582 | readbuf, writebuf, offset, len); | |
4583 | return -1; | |
4584 | } | |
4585 | } | |
4586 | ||
4587 | ||
d0849a9a KB |
4588 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4589 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4590 | otherwise transfer them from the target. TARGET is unused. | |
4591 | ||
4592 | The return value is 0 if an error occurred or no bytes were | |
4593 | transferred. Otherwise, it will be a positive value which | |
4594 | indicates the number of bytes transferred between gdb and the | |
4595 | target. (Note that the interface also makes provisions for | |
4596 | negative values, but this capability isn't implemented here.) */ | |
4597 | ||
c3f6f71d | 4598 | static int |
0b62613e | 4599 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4600 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4601 | { |
4602 | procinfo *pi; | |
4603 | int nbytes = 0; | |
c906108c | 4604 | |
c3f6f71d | 4605 | /* Find procinfo for main process */ |
39f77062 | 4606 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4607 | if (pi->as_fd == 0 && |
4608 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4609 | { |
c3f6f71d JM |
4610 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4611 | return 0; | |
c906108c | 4612 | } |
c906108c | 4613 | |
c3f6f71d | 4614 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4615 | { |
c3f6f71d | 4616 | if (dowrite) |
c906108c | 4617 | { |
c3f6f71d JM |
4618 | #ifdef NEW_PROC_API |
4619 | PROCFS_NOTE ("write memory: "); | |
c906108c | 4620 | #else |
c3f6f71d | 4621 | PROCFS_NOTE ("write memory: \n"); |
c906108c | 4622 | #endif |
c3f6f71d | 4623 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4624 | } |
c3f6f71d | 4625 | else |
c906108c | 4626 | { |
c3f6f71d JM |
4627 | PROCFS_NOTE ("read memory: \n"); |
4628 | nbytes = read (pi->as_fd, myaddr, len); | |
c906108c | 4629 | } |
c3f6f71d | 4630 | if (nbytes < 0) |
c906108c | 4631 | { |
c3f6f71d | 4632 | nbytes = 0; |
c906108c | 4633 | } |
c906108c | 4634 | } |
c3f6f71d | 4635 | return nbytes; |
c906108c SS |
4636 | } |
4637 | ||
4638 | /* | |
c3f6f71d JM |
4639 | * Function: invalidate_cache |
4640 | * | |
4641 | * Called by target_resume before making child runnable. | |
4642 | * Mark cached registers and status's invalid. | |
4643 | * If there are "dirty" caches that need to be written back | |
4644 | * to the child process, do that. | |
4645 | * | |
19958708 | 4646 | * File descriptors are also cached. |
c3f6f71d JM |
4647 | * As they are a limited resource, we cannot hold onto them indefinitely. |
4648 | * However, as they are expensive to open, we don't want to throw them | |
4649 | * away indescriminately either. As a compromise, we will keep the | |
4650 | * file descriptors for the parent process, but discard any file | |
4651 | * descriptors we may have accumulated for the threads. | |
4652 | * | |
4653 | * Return value: | |
19958708 | 4654 | * As this function is called by iterate_over_threads, it always |
c3f6f71d | 4655 | * returns zero (so that iterate_over_threads will keep iterating). |
c906108c SS |
4656 | */ |
4657 | ||
c3f6f71d JM |
4658 | |
4659 | static int | |
fba45db2 | 4660 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4661 | { |
c3f6f71d JM |
4662 | /* |
4663 | * About to run the child; invalidate caches and do any other cleanup. | |
4664 | */ | |
c906108c | 4665 | |
c3f6f71d JM |
4666 | #if 0 |
4667 | if (pi->gregs_dirty) | |
4668 | if (parent == NULL || | |
4669 | proc_get_current_thread (parent) != pi->tid) | |
4670 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4671 | proc_warn (pi, "target_resume, set_gregs", | |
4672 | __LINE__); | |
a97b0ac8 | 4673 | if (gdbarch_fp0_regnum (target_gdbarch) >= 0) |
60054393 MS |
4674 | if (pi->fpregs_dirty) |
4675 | if (parent == NULL || | |
4676 | proc_get_current_thread (parent) != pi->tid) | |
4677 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4678 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4679 | __LINE__); |
c906108c | 4680 | #endif |
c906108c | 4681 | |
c3f6f71d | 4682 | if (parent != NULL) |
c906108c | 4683 | { |
c3f6f71d | 4684 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4685 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4686 | We don't do this to the master (parent) procinfo. */ |
4687 | ||
4688 | close_procinfo_files (pi); | |
c906108c | 4689 | } |
c3f6f71d JM |
4690 | pi->gregs_valid = 0; |
4691 | pi->fpregs_valid = 0; | |
4692 | #if 0 | |
4693 | pi->gregs_dirty = 0; | |
4694 | pi->fpregs_dirty = 0; | |
c906108c | 4695 | #endif |
c3f6f71d JM |
4696 | pi->status_valid = 0; |
4697 | pi->threads_valid = 0; | |
c906108c | 4698 | |
c3f6f71d | 4699 | return 0; |
c906108c SS |
4700 | } |
4701 | ||
0fda6bd2 | 4702 | #if 0 |
c906108c | 4703 | /* |
c3f6f71d JM |
4704 | * Function: make_signal_thread_runnable |
4705 | * | |
4706 | * A callback function for iterate_over_threads. | |
4707 | * Find the asynchronous signal thread, and make it runnable. | |
4708 | * See if that helps matters any. | |
c906108c SS |
4709 | */ |
4710 | ||
c3f6f71d | 4711 | static int |
fba45db2 | 4712 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4713 | { |
c3f6f71d JM |
4714 | #ifdef PR_ASLWP |
4715 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4716 | { |
c3f6f71d JM |
4717 | if (!proc_run_process (pi, 0, -1)) |
4718 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4719 | return 1; | |
c906108c | 4720 | } |
c906108c | 4721 | #endif |
c3f6f71d | 4722 | return 0; |
c906108c | 4723 | } |
0fda6bd2 | 4724 | #endif |
c906108c SS |
4725 | |
4726 | /* | |
c3f6f71d JM |
4727 | * Function: target_resume |
4728 | * | |
4729 | * Make the child process runnable. Normally we will then call | |
4730 | * procfs_wait and wait for it to stop again (unles gdb is async). | |
4731 | * | |
4732 | * Arguments: | |
19958708 | 4733 | * step: if true, then arrange for the child to stop again |
c3f6f71d JM |
4734 | * after executing a single instruction. |
4735 | * signo: if zero, then cancel any pending signal. | |
19958708 | 4736 | * If non-zero, then arrange for the indicated signal |
c3f6f71d JM |
4737 | * to be delivered to the child when it runs. |
4738 | * pid: if -1, then allow any child thread to run. | |
4739 | * if non-zero, then allow only the indicated thread to run. | |
4740 | ******* (not implemented yet) | |
c906108c SS |
4741 | */ |
4742 | ||
4743 | static void | |
28439f5e PA |
4744 | procfs_resume (struct target_ops *ops, |
4745 | ptid_t ptid, int step, enum target_signal signo) | |
c906108c | 4746 | { |
c3f6f71d JM |
4747 | procinfo *pi, *thread; |
4748 | int native_signo; | |
4749 | ||
19958708 | 4750 | /* 2.1: |
c3f6f71d | 4751 | prrun.prflags |= PRSVADDR; |
19958708 | 4752 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4753 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4754 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4755 | prrun.prflags |= PRCFAULT; clear current fault. |
4756 | ||
4757 | PRSTRACE and PRSFAULT can be done by other means | |
4758 | (proc_trace_signals, proc_trace_faults) | |
4759 | PRSVADDR is unnecessary. | |
4760 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4761 | This basically leaves PRSTEP and PRCSIG. | |
4762 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4763 | So basically PR_STEP is the sole argument that must be passed | |
4764 | to proc_run_process (for use in the prrun struct by ioctl). */ | |
4765 | ||
4766 | /* Find procinfo for main process */ | |
39f77062 | 4767 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4768 | |
4769 | /* First cut: ignore pid argument */ | |
4770 | errno = 0; | |
c906108c | 4771 | |
c3f6f71d JM |
4772 | /* Convert signal to host numbering. */ |
4773 | if (signo == 0 || | |
0fda6bd2 | 4774 | (signo == TARGET_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4775 | native_signo = 0; |
4776 | else | |
4777 | native_signo = target_signal_to_host (signo); | |
c906108c | 4778 | |
c3f6f71d | 4779 | pi->ignore_next_sigstop = 0; |
c906108c | 4780 | |
c3f6f71d JM |
4781 | /* Running the process voids all cached registers and status. */ |
4782 | /* Void the threads' caches first */ | |
19958708 | 4783 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4784 | /* Void the process procinfo's caches. */ |
4785 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4786 | |
39f77062 | 4787 | if (PIDGET (ptid) != -1) |
c906108c | 4788 | { |
c3f6f71d | 4789 | /* Resume a specific thread, presumably suppressing the others. */ |
39f77062 | 4790 | thread = find_procinfo (PIDGET (ptid), TIDGET (ptid)); |
7de45904 | 4791 | if (thread != NULL) |
c906108c | 4792 | { |
c3f6f71d JM |
4793 | if (thread->tid != 0) |
4794 | { | |
4795 | /* We're to resume a specific thread, and not the others. | |
4796 | * Set the child process's PR_ASYNC flag. | |
4797 | */ | |
4798 | #ifdef PR_ASYNC | |
4799 | if (!proc_set_async (pi)) | |
4800 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4801 | #endif | |
4802 | #if 0 | |
19958708 | 4803 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4804 | make_signal_thread_runnable, |
4805 | NULL); | |
4806 | #endif | |
4807 | pi = thread; /* substitute the thread's procinfo for run */ | |
4808 | } | |
c906108c SS |
4809 | } |
4810 | } | |
c906108c | 4811 | |
c3f6f71d | 4812 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4813 | { |
c3f6f71d | 4814 | if (errno == EBUSY) |
8a3fe4f8 | 4815 | warning (_("resume: target already running. Pretend to resume, and hope for the best!")); |
c3f6f71d JM |
4816 | else |
4817 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4818 | } |
c3f6f71d | 4819 | } |
c906108c | 4820 | |
c3f6f71d JM |
4821 | /* |
4822 | * Function: register_gdb_signals | |
4823 | * | |
19958708 | 4824 | * Traverse the list of signals that GDB knows about |
c3f6f71d JM |
4825 | * (see "handle" command), and arrange for the target |
4826 | * to be stopped or not, according to these settings. | |
4827 | * | |
4828 | * Returns non-zero for success, zero for failure. | |
4829 | */ | |
c906108c | 4830 | |
c3f6f71d | 4831 | static int |
37de36c6 | 4832 | register_gdb_signals (procinfo *pi, gdb_sigset_t *signals) |
c3f6f71d JM |
4833 | { |
4834 | int signo; | |
c906108c | 4835 | |
c3f6f71d JM |
4836 | for (signo = 0; signo < NSIG; signo ++) |
4837 | if (signal_stop_state (target_signal_from_host (signo)) == 0 && | |
4838 | signal_print_state (target_signal_from_host (signo)) == 0 && | |
4839 | signal_pass_state (target_signal_from_host (signo)) == 1) | |
3c95f01c | 4840 | gdb_prdelset (signals, signo); |
c3f6f71d | 4841 | else |
3c95f01c | 4842 | gdb_praddset (signals, signo); |
c906108c | 4843 | |
c3f6f71d | 4844 | return proc_set_traced_signals (pi, signals); |
c906108c SS |
4845 | } |
4846 | ||
4847 | /* | |
c3f6f71d JM |
4848 | * Function: target_notice_signals |
4849 | * | |
4850 | * Set up to trace signals in the child process. | |
4851 | */ | |
c906108c | 4852 | |
c3f6f71d | 4853 | static void |
39f77062 | 4854 | procfs_notice_signals (ptid_t ptid) |
c3f6f71d | 4855 | { |
37de36c6 | 4856 | gdb_sigset_t signals; |
39f77062 | 4857 | procinfo *pi = find_procinfo_or_die (PIDGET (ptid), 0); |
c906108c | 4858 | |
c3f6f71d JM |
4859 | if (proc_get_traced_signals (pi, &signals) && |
4860 | register_gdb_signals (pi, &signals)) | |
4861 | return; | |
4862 | else | |
4863 | proc_error (pi, "notice_signals", __LINE__); | |
4864 | } | |
c906108c | 4865 | |
c3f6f71d JM |
4866 | /* |
4867 | * Function: target_files_info | |
4868 | * | |
4869 | * Print status information about the child process. | |
4870 | */ | |
c906108c | 4871 | |
c3f6f71d | 4872 | static void |
fba45db2 | 4873 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4874 | { |
181e7f93 | 4875 | struct inferior *inf = current_inferior (); |
a3f17187 | 4876 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4877 | inf->attach_flag? "attached": "child", |
39f77062 | 4878 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4879 | } |
c906108c | 4880 | |
c3f6f71d JM |
4881 | /* |
4882 | * Function: target_stop | |
4883 | * | |
4884 | * Stop the child process asynchronously, as when the | |
4885 | * gdb user types control-c or presses a "stop" button. | |
4886 | * | |
4887 | * Works by sending kill(SIGINT) to the child's process group. | |
4888 | */ | |
c906108c | 4889 | |
c3f6f71d | 4890 | static void |
f9c72d52 | 4891 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4892 | { |
7e1789f5 | 4893 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4894 | } |
4895 | ||
c906108c | 4896 | /* |
c3f6f71d JM |
4897 | * Function: unconditionally_kill_inferior |
4898 | * | |
4899 | * Make it die. Wait for it to die. Clean up after it. | |
19958708 | 4900 | * Note: this should only be applied to the real process, |
c3f6f71d JM |
4901 | * not to an LWP, because of the check for parent-process. |
4902 | * If we need this to work for an LWP, it needs some more logic. | |
4903 | */ | |
c906108c | 4904 | |
c3f6f71d | 4905 | static void |
fba45db2 | 4906 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4907 | { |
4908 | int parent_pid; | |
c906108c | 4909 | |
c3f6f71d JM |
4910 | parent_pid = proc_parent_pid (pi); |
4911 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
4912 | /* FIXME: use access functions */ | |
4913 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal | |
4914 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4915 | file for the inferior. */ | |
4916 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4917 | { | |
4918 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4919 | } | |
4920 | #endif | |
4921 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4922 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4923 | to kill the inferior, otherwise it might remain stopped with a | |
4924 | pending SIGKILL. | |
4925 | We do not check the result of the PIOCSSIG, the inferior might have | |
4926 | died already. */ | |
4927 | { | |
37de36c6 | 4928 | gdb_siginfo_t newsiginfo; |
c906108c | 4929 | |
c3f6f71d JM |
4930 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4931 | newsiginfo.si_signo = SIGKILL; | |
4932 | newsiginfo.si_code = 0; | |
4933 | newsiginfo.si_errno = 0; | |
4934 | newsiginfo.si_pid = getpid (); | |
4935 | newsiginfo.si_uid = getuid (); | |
4936 | /* FIXME: use proc_set_current_signal */ | |
4937 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); | |
4938 | } | |
4939 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4940 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4941 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4942 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4943 | destroy_procinfo (pi); | |
c906108c | 4944 | |
c3f6f71d JM |
4945 | /* If pi is GDB's child, wait for it to die. */ |
4946 | if (parent_pid == getpid ()) | |
19958708 | 4947 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4948 | Should we check the returned event? */ |
4949 | { | |
0d06e24b | 4950 | #if 0 |
c3f6f71d | 4951 | int status, ret; |
c906108c | 4952 | |
c3f6f71d JM |
4953 | ret = waitpid (pi->pid, &status, 0); |
4954 | #else | |
4955 | wait (NULL); | |
4956 | #endif | |
4957 | } | |
4958 | } | |
c906108c | 4959 | |
c3f6f71d JM |
4960 | /* |
4961 | * Function: target_kill_inferior | |
4962 | * | |
4963 | * We're done debugging it, and we want it to go away. | |
4964 | * Then we want GDB to forget all about it. | |
c906108c SS |
4965 | */ |
4966 | ||
19958708 | 4967 | static void |
7d85a9c0 | 4968 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4969 | { |
39f77062 | 4970 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d JM |
4971 | { |
4972 | /* Find procinfo for main process */ | |
39f77062 | 4973 | procinfo *pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c906108c | 4974 | |
c3f6f71d JM |
4975 | if (pi) |
4976 | unconditionally_kill_inferior (pi); | |
4977 | target_mourn_inferior (); | |
c906108c | 4978 | } |
c3f6f71d JM |
4979 | } |
4980 | ||
4981 | /* | |
4982 | * Function: target_mourn_inferior | |
4983 | * | |
4984 | * Forget we ever debugged this thing! | |
4985 | */ | |
c906108c | 4986 | |
19958708 | 4987 | static void |
136d6dae | 4988 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4989 | { |
4990 | procinfo *pi; | |
c906108c | 4991 | |
39f77062 | 4992 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d JM |
4993 | { |
4994 | /* Find procinfo for main process */ | |
39f77062 | 4995 | pi = find_procinfo (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
4996 | if (pi) |
4997 | destroy_procinfo (pi); | |
c906108c | 4998 | } |
28439f5e | 4999 | unpush_target (ops); |
8181d85f DJ |
5000 | |
5001 | if (dbx_link_bpt != NULL) | |
5002 | { | |
a6d9a66e | 5003 | deprecated_remove_raw_breakpoint (target_gdbarch, dbx_link_bpt); |
8181d85f DJ |
5004 | dbx_link_bpt_addr = 0; |
5005 | dbx_link_bpt = NULL; | |
5006 | } | |
5007 | ||
c3f6f71d JM |
5008 | generic_mourn_inferior (); |
5009 | } | |
c906108c | 5010 | |
c3f6f71d JM |
5011 | /* |
5012 | * Function: init_inferior | |
5013 | * | |
19958708 | 5014 | * When GDB forks to create a runnable inferior process, |
c3f6f71d JM |
5015 | * this function is called on the parent side of the fork. |
5016 | * It's job is to do whatever is necessary to make the child | |
5017 | * ready to be debugged, and then wait for the child to synchronize. | |
5018 | */ | |
c906108c | 5019 | |
19958708 | 5020 | static void |
28439f5e | 5021 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
5022 | { |
5023 | procinfo *pi; | |
37de36c6 | 5024 | gdb_sigset_t signals; |
c3f6f71d | 5025 | int fail; |
2689673f | 5026 | int lwpid; |
c906108c | 5027 | |
c3f6f71d JM |
5028 | /* This routine called on the parent side (GDB side) |
5029 | after GDB forks the inferior. */ | |
28439f5e | 5030 | push_target (ops); |
c906108c | 5031 | |
c3f6f71d JM |
5032 | if ((pi = create_procinfo (pid, 0)) == NULL) |
5033 | perror ("procfs: out of memory in 'init_inferior'"); | |
5034 | ||
5035 | if (!open_procinfo_files (pi, FD_CTL)) | |
5036 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
5037 | ||
5038 | /* | |
5039 | xmalloc // done | |
5040 | open_procinfo_files // done | |
5041 | link list // done | |
5042 | prfillset (trace) | |
5043 | procfs_notice_signals | |
5044 | prfillset (fault) | |
5045 | prdelset (FLTPAGE) | |
5046 | PIOCWSTOP | |
5047 | PIOCSFAULT | |
5048 | */ | |
5049 | ||
5050 | /* If not stopped yet, wait for it to stop. */ | |
5051 | if (!(proc_flags (pi) & PR_STOPPED) && | |
5052 | !(proc_wait_for_stop (pi))) | |
5053 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
5054 | ||
5055 | /* Save some of the /proc state to be restored if we detach. */ | |
5056 | /* FIXME: Why? In case another debugger was debugging it? | |
5057 | We're it's parent, for Ghu's sake! */ | |
5058 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
5059 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
5060 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
5061 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
5062 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
5063 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 5064 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 5065 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 5066 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
5067 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
5068 | ||
5069 | /* Register to trace selected signals in the child. */ | |
5070 | prfillset (&signals); | |
5071 | if (!register_gdb_signals (pi, &signals)) | |
5072 | proc_error (pi, "init_inferior, register_signals", __LINE__); | |
5073 | ||
5074 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
5075 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
5076 | ||
0d06e24b JM |
5077 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
5078 | and possibly even turning ON kill-on-last-close at this point. But | |
5079 | I can't make that change without careful testing which I don't have | |
5080 | time to do right now... */ | |
c3f6f71d JM |
5081 | /* Turn on run-on-last-close flag so that the child |
5082 | will die if GDB goes away for some reason. */ | |
5083 | if (!proc_set_run_on_last_close (pi)) | |
5084 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
5085 | ||
2689673f PA |
5086 | /* We now have have access to the lwpid of the main thread/lwp. */ |
5087 | lwpid = proc_get_current_thread (pi); | |
5088 | ||
5089 | /* Create a procinfo for the main lwp. */ | |
5090 | create_procinfo (pid, lwpid); | |
5091 | ||
5092 | /* We already have a main thread registered in the thread table at | |
5093 | this point, but it didn't have any lwp info yet. Notify the core | |
5094 | about it. This changes inferior_ptid as well. */ | |
5095 | thread_change_ptid (pid_to_ptid (pid), | |
5096 | MERGEPID (pid, lwpid)); | |
c906108c | 5097 | |
46ac7a5d AC |
5098 | /* Typically two, one trap to exec the shell, one to exec the |
5099 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 5100 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
5101 | |
5102 | #ifdef SYS_syssgi | |
5103 | /* On mips-irix, we need to stop the inferior early enough during | |
5104 | the startup phase in order to be able to load the shared library | |
5105 | symbols and insert the breakpoints that are located in these shared | |
5106 | libraries. Stopping at the program entry point is not good enough | |
5107 | because the -init code is executed before the execution reaches | |
5108 | that point. | |
5109 | ||
5110 | So what we need to do is to insert a breakpoint in the runtime | |
5111 | loader (rld), more precisely in __dbx_link(). This procedure is | |
5112 | called by rld once all shared libraries have been mapped, but before | |
5113 | the -init code is executed. Unfortuantely, this is not straightforward, | |
5114 | as rld is not part of the executable we are running, and thus we need | |
5115 | the inferior to run until rld itself has been mapped in memory. | |
5116 | ||
5117 | For this, we trace all syssgi() syscall exit events. Each time | |
5118 | we detect such an event, we iterate over each text memory maps, | |
5119 | get its associated fd, and scan the symbol table for __dbx_link(). | |
5120 | When found, we know that rld has been mapped, and that we can insert | |
5121 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
5122 | has been inserted, the syssgi() notifications are no longer necessary, | |
5123 | so they should be canceled. */ | |
5124 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 5125 | #endif |
c3f6f71d | 5126 | } |
c906108c | 5127 | |
c3f6f71d JM |
5128 | /* |
5129 | * Function: set_exec_trap | |
5130 | * | |
5131 | * When GDB forks to create a new process, this function is called | |
5132 | * on the child side of the fork before GDB exec's the user program. | |
5133 | * Its job is to make the child minimally debuggable, so that the | |
5134 | * parent GDB process can connect to the child and take over. | |
5135 | * This function should do only the minimum to make that possible, | |
5136 | * and to synchronize with the parent process. The parent process | |
5137 | * should take care of the details. | |
5138 | */ | |
5139 | ||
5140 | static void | |
fba45db2 | 5141 | procfs_set_exec_trap (void) |
c3f6f71d JM |
5142 | { |
5143 | /* This routine called on the child side (inferior side) | |
5144 | after GDB forks the inferior. It must use only local variables, | |
5145 | because it may be sharing data space with its parent. */ | |
c906108c | 5146 | |
c3f6f71d | 5147 | procinfo *pi; |
37de36c6 | 5148 | sysset_t *exitset; |
c906108c | 5149 | |
c3f6f71d | 5150 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 5151 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 5152 | |
c3f6f71d JM |
5153 | if (open_procinfo_files (pi, FD_CTL) == 0) |
5154 | { | |
5155 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
5156 | gdb_flush (gdb_stderr); | |
5157 | /* no need to call "dead_procinfo", because we're going to exit. */ | |
5158 | _exit (127); | |
5159 | } | |
c906108c | 5160 | |
c3f6f71d JM |
5161 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
5162 | /* OSF method for tracing exec syscalls. Quoting: | |
5163 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
5164 | exits from exec system calls because of the user level loader. */ | |
5165 | /* FIXME: make nice and maybe move into an access function. */ | |
5166 | { | |
5167 | int prfs_flags; | |
c906108c | 5168 | |
c3f6f71d JM |
5169 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
5170 | { | |
5171 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
5172 | gdb_flush (gdb_stderr); | |
5173 | _exit (127); | |
5174 | } | |
5175 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 5176 | |
c3f6f71d JM |
5177 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
5178 | { | |
5179 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
5180 | gdb_flush (gdb_stderr); | |
5181 | _exit (127); | |
5182 | } | |
5183 | } | |
5184 | #else /* not PRFS_STOPEXEC */ | |
5185 | /* Everyone else's (except OSF) method for tracing exec syscalls */ | |
5186 | /* GW: Rationale... | |
5187 | Not all systems with /proc have all the exec* syscalls with the same | |
5188 | names. On the SGI, for example, there is no SYS_exec, but there | |
5189 | *is* a SYS_execv. So, we try to account for that. */ | |
c906108c | 5190 | |
37de36c6 KB |
5191 | exitset = sysset_t_alloc (pi); |
5192 | gdb_premptysysset (exitset); | |
c3f6f71d | 5193 | #ifdef SYS_exec |
37de36c6 | 5194 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
5195 | #endif |
5196 | #ifdef SYS_execve | |
37de36c6 | 5197 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
5198 | #endif |
5199 | #ifdef SYS_execv | |
37de36c6 | 5200 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 5201 | #endif |
37de36c6 KB |
5202 | #ifdef DYNAMIC_SYSCALLS |
5203 | { | |
5204 | int callnum = find_syscall (pi, "execve"); | |
5205 | ||
5206 | if (callnum >= 0) | |
5207 | gdb_praddsysset (exitset, callnum); | |
c906108c | 5208 | |
37de36c6 KB |
5209 | callnum = find_syscall (pi, "ra_execve"); |
5210 | if (callnum >= 0) | |
5211 | gdb_praddsysset (exitset, callnum); | |
5212 | } | |
5213 | #endif /* DYNAMIC_SYSCALLS */ | |
5214 | ||
5215 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 5216 | { |
c3f6f71d JM |
5217 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
5218 | gdb_flush (gdb_stderr); | |
5219 | _exit (127); | |
c906108c | 5220 | } |
c3f6f71d JM |
5221 | #endif /* PRFS_STOPEXEC */ |
5222 | ||
5223 | /* FIXME: should this be done in the parent instead? */ | |
5224 | /* Turn off inherit on fork flag so that all grand-children | |
5225 | of gdb start with tracing flags cleared. */ | |
5226 | if (!proc_unset_inherit_on_fork (pi)) | |
5227 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
5228 | ||
5229 | /* Turn off run on last close flag, so that the child process | |
5230 | cannot run away just because we close our handle on it. | |
5231 | We want it to wait for the parent to attach. */ | |
5232 | if (!proc_unset_run_on_last_close (pi)) | |
5233 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
5234 | ||
19958708 | 5235 | /* FIXME: No need to destroy the procinfo -- |
c3f6f71d JM |
5236 | we have our own address space, and we're about to do an exec! */ |
5237 | /*destroy_procinfo (pi);*/ | |
c906108c | 5238 | } |
c906108c | 5239 | |
c3f6f71d JM |
5240 | /* |
5241 | * Function: create_inferior | |
5242 | * | |
5243 | * This function is called BEFORE gdb forks the inferior process. | |
19958708 | 5244 | * Its only real responsibility is to set things up for the fork, |
c3f6f71d JM |
5245 | * and tell GDB which two functions to call after the fork (one |
5246 | * for the parent, and one for the child). | |
19958708 | 5247 | * |
c3f6f71d JM |
5248 | * This function does a complicated search for a unix shell program, |
5249 | * which it then uses to parse arguments and environment variables | |
5250 | * to be sent to the child. I wonder whether this code could not | |
5251 | * be abstracted out and shared with other unix targets such as | |
5252 | * infptrace? | |
5253 | */ | |
c906108c SS |
5254 | |
5255 | static void | |
136d6dae VP |
5256 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
5257 | char *allargs, char **env, int from_tty) | |
c906108c SS |
5258 | { |
5259 | char *shell_file = getenv ("SHELL"); | |
5260 | char *tryname; | |
28439f5e PA |
5261 | int pid; |
5262 | ||
c906108c SS |
5263 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
5264 | { | |
5265 | ||
5266 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
5267 | just do this the normal way (via execlp, which operates by |
5268 | attempting an exec for each element of the PATH until it | |
5269 | finds one which succeeds), then there will be an exec for | |
5270 | each failed attempt, each of which will cause a PR_SYSEXIT | |
5271 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
5272 | for these failed execs with the ones for successful execs | |
5273 | (whether the exec has succeeded is stored at that time in the | |
5274 | carry bit or some such architecture-specific and | |
5275 | non-ABI-specified place). | |
5276 | ||
5277 | So I can't think of anything better than to search the PATH | |
5278 | now. This has several disadvantages: (1) There is a race | |
5279 | condition; if we find a file now and it is deleted before we | |
5280 | exec it, we lose, even if the deletion leaves a valid file | |
5281 | further down in the PATH, (2) there is no way to know exactly | |
5282 | what an executable (in the sense of "capable of being | |
5283 | exec'd") file is. Using access() loses because it may lose | |
5284 | if the caller is the superuser; failing to use it loses if | |
5285 | there are ACLs or some such. */ | |
c906108c SS |
5286 | |
5287 | char *p; | |
5288 | char *p1; | |
5289 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 5290 | path is used from within GDB. */ |
c906108c SS |
5291 | char *path = getenv ("PATH"); |
5292 | int len; | |
5293 | struct stat statbuf; | |
5294 | ||
5295 | if (path == NULL) | |
5296 | path = "/bin:/usr/bin"; | |
5297 | ||
5298 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 5299 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
5300 | { |
5301 | p1 = strchr (p, ':'); | |
5302 | if (p1 != NULL) | |
5303 | len = p1 - p; | |
5304 | else | |
5305 | len = strlen (p); | |
5306 | strncpy (tryname, p, len); | |
5307 | tryname[len] = '\0'; | |
5308 | strcat (tryname, "/"); | |
5309 | strcat (tryname, shell_file); | |
5310 | if (access (tryname, X_OK) < 0) | |
5311 | continue; | |
5312 | if (stat (tryname, &statbuf) < 0) | |
5313 | continue; | |
5314 | if (!S_ISREG (statbuf.st_mode)) | |
5315 | /* We certainly need to reject directories. I'm not quite | |
5316 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
5317 | that people want to exec() these things. */ | |
5318 | continue; | |
5319 | break; | |
5320 | } | |
5321 | if (p == NULL) | |
5322 | /* Not found. This must be an error rather than merely passing | |
5323 | the file to execlp(), because execlp() would try all the | |
5324 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 5325 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 5326 | __LINE__, shell_file); |
c906108c SS |
5327 | |
5328 | shell_file = tryname; | |
5329 | } | |
5330 | ||
28439f5e PA |
5331 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
5332 | NULL, NULL, shell_file); | |
5333 | ||
5334 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
5335 | } |
5336 | ||
5337 | /* An observer for the "inferior_created" event. */ | |
c906108c | 5338 | |
27087a3d JB |
5339 | static void |
5340 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
5341 | { | |
9185ddce JB |
5342 | #ifdef SYS_syssgi |
5343 | /* Make sure to cancel the syssgi() syscall-exit notifications. | |
5344 | They should normally have been removed by now, but they may still | |
5345 | be activated if the inferior doesn't use shared libraries, or if | |
5346 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
5347 | See procfs_init_inferior() for more details. |
5348 | ||
5349 | Since these notifications are only ever enabled when we spawned | |
5350 | the inferior ourselves, there is nothing to do when the inferior | |
5351 | was created by attaching to an already running process, or when | |
5352 | debugging a core file. */ | |
5353 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
5354 | return; | |
5355 | ||
9185ddce JB |
5356 | proc_trace_syscalls_1 (find_procinfo_or_die (PIDGET (inferior_ptid), 0), |
5357 | SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
5358 | #endif | |
c906108c SS |
5359 | } |
5360 | ||
c3f6f71d JM |
5361 | /* |
5362 | * Function: notice_thread | |
5363 | * | |
5364 | * Callback for find_new_threads. | |
5365 | * Calls "add_thread". | |
5366 | */ | |
c906108c | 5367 | |
c3f6f71d | 5368 | static int |
fba45db2 | 5369 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 5370 | { |
39f77062 | 5371 | ptid_t gdb_threadid = MERGEPID (pi->pid, thread->tid); |
c906108c | 5372 | |
2689673f | 5373 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 5374 | add_thread (gdb_threadid); |
c906108c | 5375 | |
c3f6f71d JM |
5376 | return 0; |
5377 | } | |
5378 | ||
5379 | /* | |
5380 | * Function: target_find_new_threads | |
5381 | * | |
19958708 | 5382 | * Query all the threads that the target knows about, |
c3f6f71d JM |
5383 | * and give them back to GDB to add to its list. |
5384 | */ | |
5385 | ||
5386 | void | |
28439f5e | 5387 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
5388 | { |
5389 | procinfo *pi; | |
5390 | ||
5391 | /* Find procinfo for main process */ | |
39f77062 | 5392 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5393 | proc_update_threads (pi); |
5394 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
5395 | } |
5396 | ||
19958708 | 5397 | /* |
c3f6f71d JM |
5398 | * Function: target_thread_alive |
5399 | * | |
5400 | * Return true if the thread is still 'alive'. | |
5401 | * | |
5402 | * This guy doesn't really seem to be doing his job. | |
5403 | * Got to investigate how to tell when a thread is really gone. | |
5404 | */ | |
c906108c | 5405 | |
c906108c | 5406 | static int |
28439f5e | 5407 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 5408 | { |
c3f6f71d JM |
5409 | int proc, thread; |
5410 | procinfo *pi; | |
c906108c | 5411 | |
39f77062 KB |
5412 | proc = PIDGET (ptid); |
5413 | thread = TIDGET (ptid); | |
c3f6f71d JM |
5414 | /* If I don't know it, it ain't alive! */ |
5415 | if ((pi = find_procinfo (proc, thread)) == NULL) | |
5416 | return 0; | |
5417 | ||
5418 | /* If I can't get its status, it ain't alive! | |
5419 | What's more, I need to forget about it! */ | |
5420 | if (!proc_get_status (pi)) | |
5421 | { | |
5422 | destroy_procinfo (pi); | |
5423 | return 0; | |
5424 | } | |
5425 | /* I couldn't have got its status if it weren't alive, so it's alive. */ | |
5426 | return 1; | |
c906108c | 5427 | } |
c3f6f71d | 5428 | |
5240ceac | 5429 | /* Convert PTID to a string. Returns the string in a static buffer. */ |
c3f6f71d JM |
5430 | |
5431 | char * | |
117de6a9 | 5432 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
5433 | { |
5434 | static char buf[80]; | |
c3f6f71d | 5435 | |
5240ceac MK |
5436 | if (TIDGET (ptid) == 0) |
5437 | sprintf (buf, "process %d", PIDGET (ptid)); | |
c3f6f71d | 5438 | else |
21749010 | 5439 | sprintf (buf, "LWP %ld", TIDGET (ptid)); |
5240ceac MK |
5440 | |
5441 | return buf; | |
c3f6f71d JM |
5442 | } |
5443 | ||
5444 | /* | |
5445 | * Function: procfs_set_watchpoint | |
5446 | * Insert a watchpoint | |
5447 | */ | |
5448 | ||
19958708 | 5449 | int |
39f77062 KB |
5450 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
5451 | int after) | |
c906108c | 5452 | { |
c3f6f71d | 5453 | #ifndef UNIXWARE |
37de36c6 | 5454 | #ifndef AIX5 |
c3f6f71d | 5455 | int pflags = 0; |
19958708 | 5456 | procinfo *pi; |
c3f6f71d | 5457 | |
19958708 | 5458 | pi = find_procinfo_or_die (PIDGET (ptid) == -1 ? |
39f77062 | 5459 | PIDGET (inferior_ptid) : PIDGET (ptid), 0); |
c3f6f71d JM |
5460 | |
5461 | /* Translate from GDB's flags to /proc's */ | |
5462 | if (len > 0) /* len == 0 means delete watchpoint */ | |
c906108c | 5463 | { |
c3f6f71d JM |
5464 | switch (rwflag) { /* FIXME: need an enum! */ |
5465 | case hw_write: /* default watchpoint (write) */ | |
5466 | pflags = WRITE_WATCHFLAG; | |
5467 | break; | |
5468 | case hw_read: /* read watchpoint */ | |
5469 | pflags = READ_WATCHFLAG; | |
5470 | break; | |
5471 | case hw_access: /* access watchpoint */ | |
5472 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
5473 | break; | |
5474 | case hw_execute: /* execution HW breakpoint */ | |
5475 | pflags = EXEC_WATCHFLAG; | |
5476 | break; | |
5477 | default: /* Something weird. Return error. */ | |
c906108c | 5478 | return -1; |
c3f6f71d JM |
5479 | } |
5480 | if (after) /* Stop after r/w access is completed. */ | |
5481 | pflags |= AFTER_WATCHFLAG; | |
5482 | } | |
5483 | ||
5484 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
5485 | { | |
5486 | if (errno == E2BIG) /* Typical error for no resources */ | |
5487 | return -1; /* fail */ | |
5488 | /* GDB may try to remove the same watchpoint twice. | |
5489 | If a remove request returns no match, don't error. */ | |
c906108c | 5490 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
5491 | return 0; /* ignore */ |
5492 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 5493 | } |
37de36c6 KB |
5494 | #endif /* AIX5 */ |
5495 | #endif /* UNIXWARE */ | |
c906108c SS |
5496 | return 0; |
5497 | } | |
5498 | ||
1e03ad20 KB |
5499 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
5500 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
5501 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
5502 | far. | |
19958708 | 5503 | |
1e03ad20 KB |
5504 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
5505 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 5506 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
5507 | |
5508 | static int | |
5509 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
5510 | { | |
1e03ad20 KB |
5511 | /* Due to the way that proc_set_watchpoint() is implemented, host |
5512 | and target pointers must be of the same size. If they are not, | |
5513 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
5514 | fact that proc_set_watchpoint() calls |
5515 | procfs_address_to_host_pointer(); a close inspection of | |
5516 | procfs_address_to_host_pointer will reveal that an internal error | |
5517 | will be generated when the host and target pointer sizes are | |
5518 | different. */ | |
4e906f53 UW |
5519 | struct type *ptr_type = builtin_type (target_gdbarch)->builtin_data_ptr; |
5520 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) | |
1e03ad20 KB |
5521 | return 0; |
5522 | ||
5523 | /* Other tests here??? */ | |
5524 | ||
5525 | return 1; | |
1e03ad20 KB |
5526 | } |
5527 | ||
c3f6f71d JM |
5528 | /* |
5529 | * Function: stopped_by_watchpoint | |
5530 | * | |
5531 | * Returns non-zero if process is stopped on a hardware watchpoint fault, | |
5532 | * else returns zero. | |
5533 | */ | |
5534 | ||
25513619 PA |
5535 | static int |
5536 | procfs_stopped_by_watchpoint (void) | |
c906108c | 5537 | { |
c3f6f71d | 5538 | procinfo *pi; |
c906108c | 5539 | |
25513619 | 5540 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
aaeb7efa MS |
5541 | |
5542 | if (!pi) /* If no process, then not stopped by watchpoint! */ | |
5543 | return 0; | |
5544 | ||
c3f6f71d | 5545 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 5546 | { |
c3f6f71d | 5547 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 5548 | { |
c906108c | 5549 | #ifdef FLTWATCH |
c3f6f71d JM |
5550 | if (proc_what (pi) == FLTWATCH) |
5551 | return 1; | |
c906108c SS |
5552 | #endif |
5553 | #ifdef FLTKWATCH | |
c3f6f71d JM |
5554 | if (proc_what (pi) == FLTKWATCH) |
5555 | return 1; | |
c906108c | 5556 | #endif |
c3f6f71d | 5557 | } |
c906108c SS |
5558 | } |
5559 | return 0; | |
5560 | } | |
c906108c | 5561 | |
25513619 PA |
5562 | static int |
5563 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type) | |
5564 | { | |
d92524f1 | 5565 | if (!target_have_steppable_watchpoint |
a97b0ac8 | 5566 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch)) |
25513619 PA |
5567 | { |
5568 | /* When a hardware watchpoint fires off the PC will be left at | |
5569 | the instruction following the one which caused the | |
5570 | watchpoint. It will *NOT* be necessary for GDB to step over | |
5571 | the watchpoint. */ | |
5572 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
5573 | } | |
5574 | else | |
5575 | { | |
5576 | /* When a hardware watchpoint fires off the PC will be left at | |
5577 | the instruction which caused the watchpoint. It will be | |
5578 | necessary for GDB to step over the watchpoint. */ | |
5579 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
5580 | } | |
5581 | } | |
5582 | ||
5583 | static int | |
5584 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type) | |
5585 | { | |
5586 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
5587 | } | |
5588 | ||
5589 | static int | |
5590 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
5591 | { | |
5592 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
5593 | system can support "thousands" of hardware watchpoints, but gives | |
5594 | no method for finding out how many; It doesn't say anything about | |
5595 | the allowed size for the watched area either. So we just tell | |
5596 | GDB 'yes'. */ | |
5597 | return 1; | |
5598 | } | |
5599 | ||
5600 | void | |
5601 | procfs_use_watchpoints (struct target_ops *t) | |
5602 | { | |
5603 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
5604 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
5605 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
5606 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 5607 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
25513619 PA |
5608 | } |
5609 | ||
831e682e MS |
5610 | /* |
5611 | * Memory Mappings Functions: | |
5612 | */ | |
5613 | ||
19958708 | 5614 | /* |
831e682e MS |
5615 | * Function: iterate_over_mappings |
5616 | * | |
5617 | * Call a callback function once for each mapping, passing it the mapping, | |
5618 | * an optional secondary callback function, and some optional opaque data. | |
5619 | * Quit and return the first non-zero value returned from the callback. | |
5620 | * | |
5621 | * Arguments: | |
5622 | * pi -- procinfo struct for the process to be mapped. | |
5623 | * func -- callback function to be called by this iterator. | |
5624 | * data -- optional opaque data to be passed to the callback function. | |
5625 | * child_func -- optional secondary function pointer to be passed | |
5626 | * to the child function. | |
5627 | * | |
19958708 | 5628 | * Return: First non-zero return value from the callback function, |
831e682e MS |
5629 | * or zero. |
5630 | */ | |
5631 | ||
5632 | static int | |
e9ef4f39 JB |
5633 | iterate_over_mappings (procinfo *pi, |
5634 | iterate_over_mappings_cb_ftype *child_func, | |
5635 | void *data, | |
19958708 | 5636 | int (*func) (struct prmap *map, |
e9ef4f39 | 5637 | iterate_over_mappings_cb_ftype *child_func, |
831e682e MS |
5638 | void *data)) |
5639 | { | |
5640 | char pathname[MAX_PROC_NAME_SIZE]; | |
5641 | struct prmap *prmaps; | |
5642 | struct prmap *prmap; | |
5643 | int funcstat; | |
5644 | int map_fd; | |
5645 | int nmap; | |
5646 | #ifdef NEW_PROC_API | |
5647 | struct stat sbuf; | |
5648 | #endif | |
5649 | ||
19958708 | 5650 | /* Get the number of mappings, allocate space, |
831e682e MS |
5651 | and read the mappings into prmaps. */ |
5652 | #ifdef NEW_PROC_API | |
5653 | /* Open map fd. */ | |
5654 | sprintf (pathname, "/proc/%d/map", pi->pid); | |
5655 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
5656 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
5657 | ||
5658 | /* Make sure it gets closed again. */ | |
5659 | make_cleanup_close (map_fd); | |
5660 | ||
19958708 | 5661 | /* Use stat to determine the file size, and compute |
831e682e MS |
5662 | the number of prmap_t objects it contains. */ |
5663 | if (fstat (map_fd, &sbuf) != 0) | |
5664 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5665 | ||
5666 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5667 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5668 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5669 | != (nmap * sizeof (*prmaps))) | |
5670 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5671 | #else | |
5672 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5673 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5674 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5675 | ||
5676 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5677 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5678 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5679 | #endif | |
5680 | ||
5681 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5682 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
5683 | return funcstat; | |
5684 | ||
5685 | return 0; | |
5686 | } | |
5687 | ||
be4d1333 MS |
5688 | /* |
5689 | * Function: find_memory_regions_callback | |
5690 | * | |
5691 | * Implements the to_find_memory_regions method. | |
5692 | * Calls an external function for each memory region. | |
5693 | * External function will have the signiture: | |
5694 | * | |
19958708 RM |
5695 | * int callback (CORE_ADDR vaddr, |
5696 | * unsigned long size, | |
5697 | * int read, int write, int execute, | |
be4d1333 MS |
5698 | * void *data); |
5699 | * | |
5700 | * Returns the integer value returned by the callback. | |
5701 | */ | |
5702 | ||
5703 | static int | |
19958708 RM |
5704 | find_memory_regions_callback (struct prmap *map, |
5705 | int (*func) (CORE_ADDR, | |
5706 | unsigned long, | |
5707 | int, int, int, | |
be4d1333 MS |
5708 | void *), |
5709 | void *data) | |
5710 | { | |
bf75638e | 5711 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5712 | map->pr_size, |
be4d1333 MS |
5713 | (map->pr_mflags & MA_READ) != 0, |
5714 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5715 | (map->pr_mflags & MA_EXEC) != 0, |
be4d1333 MS |
5716 | data); |
5717 | } | |
5718 | ||
5719 | /* | |
5720 | * Function: proc_find_memory_regions | |
5721 | * | |
5722 | * External interface. Calls a callback function once for each | |
5723 | * mapped memory region in the child process, passing as arguments | |
5724 | * CORE_ADDR virtual_address, | |
19958708 | 5725 | * unsigned long size, |
be4d1333 MS |
5726 | * int read, TRUE if region is readable by the child |
5727 | * int write, TRUE if region is writable by the child | |
5728 | * int execute TRUE if region is executable by the child. | |
19958708 | 5729 | * |
be4d1333 MS |
5730 | * Stops iterating and returns the first non-zero value |
5731 | * returned by the callback. | |
5732 | */ | |
5733 | ||
5734 | static int | |
19958708 RM |
5735 | proc_find_memory_regions (int (*func) (CORE_ADDR, |
5736 | unsigned long, | |
5737 | int, int, int, | |
5738 | void *), | |
be4d1333 MS |
5739 | void *data) |
5740 | { | |
5741 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
5742 | ||
19958708 | 5743 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5744 | find_memory_regions_callback); |
5745 | } | |
5746 | ||
388faa48 MS |
5747 | /* |
5748 | * Function: mappingflags | |
5749 | * | |
5750 | * Returns an ascii representation of a memory mapping's flags. | |
5751 | */ | |
c3f6f71d | 5752 | |
388faa48 | 5753 | static char * |
5ae5f592 | 5754 | mappingflags (long flags) |
388faa48 MS |
5755 | { |
5756 | static char asciiflags[8]; | |
5757 | ||
5758 | strcpy (asciiflags, "-------"); | |
5759 | #if defined (MA_PHYS) | |
5760 | if (flags & MA_PHYS) | |
5761 | asciiflags[0] = 'd'; | |
5762 | #endif | |
5763 | if (flags & MA_STACK) | |
5764 | asciiflags[1] = 's'; | |
5765 | if (flags & MA_BREAK) | |
5766 | asciiflags[2] = 'b'; | |
5767 | if (flags & MA_SHARED) | |
5768 | asciiflags[3] = 's'; | |
5769 | if (flags & MA_READ) | |
5770 | asciiflags[4] = 'r'; | |
5771 | if (flags & MA_WRITE) | |
5772 | asciiflags[5] = 'w'; | |
5773 | if (flags & MA_EXEC) | |
5774 | asciiflags[6] = 'x'; | |
5775 | return (asciiflags); | |
5776 | } | |
5777 | ||
831e682e MS |
5778 | /* |
5779 | * Function: info_mappings_callback | |
5780 | * | |
5781 | * Callback function, does the actual work for 'info proc mappings'. | |
5782 | */ | |
5783 | ||
831e682e | 5784 | static int |
e9ef4f39 JB |
5785 | info_mappings_callback (struct prmap *map, |
5786 | iterate_over_mappings_cb_ftype *ignore, | |
5787 | void *unused) | |
831e682e | 5788 | { |
0b62613e | 5789 | unsigned int pr_off; |
831e682e | 5790 | |
831e682e | 5791 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5792 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5793 | #else |
0b62613e | 5794 | pr_off = map->pr_off; |
831e682e | 5795 | #endif |
0b62613e | 5796 | |
a97b0ac8 | 5797 | if (gdbarch_addr_bit (target_gdbarch) == 32) |
f6a96b83 | 5798 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5799 | (unsigned long) map->pr_vaddr, |
5800 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5801 | (unsigned long) map->pr_size, |
0b62613e PA |
5802 | pr_off, |
5803 | mappingflags (map->pr_mflags)); | |
5804 | else | |
f6a96b83 | 5805 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5806 | (unsigned long) map->pr_vaddr, |
5807 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5808 | (unsigned long) map->pr_size, |
0b62613e PA |
5809 | pr_off, |
5810 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5811 | |
5812 | return 0; | |
5813 | } | |
5814 | ||
388faa48 MS |
5815 | /* |
5816 | * Function: info_proc_mappings | |
5817 | * | |
5818 | * Implement the "info proc mappings" subcommand. | |
5819 | */ | |
5820 | ||
5821 | static void | |
5822 | info_proc_mappings (procinfo *pi, int summary) | |
5823 | { | |
388faa48 MS |
5824 | if (summary) |
5825 | return; /* No output for summary mode. */ | |
5826 | ||
a3f17187 | 5827 | printf_filtered (_("Mapped address spaces:\n\n")); |
a97b0ac8 | 5828 | if (gdbarch_ptr_bit (target_gdbarch) == 32) |
0b62613e PA |
5829 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5830 | "Start Addr", | |
5831 | " End Addr", | |
5832 | " Size", | |
5833 | " Offset", | |
5834 | "Flags"); | |
5835 | else | |
5836 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5837 | "Start Addr", | |
5838 | " End Addr", | |
5839 | " Size", | |
5840 | " Offset", | |
5841 | "Flags"); | |
388faa48 | 5842 | |
831e682e | 5843 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5844 | printf_filtered ("\n"); |
5845 | } | |
5846 | ||
5847 | /* | |
5848 | * Function: info_proc_cmd | |
5849 | * | |
5850 | * Implement the "info proc" command. | |
5851 | */ | |
c3f6f71d JM |
5852 | |
5853 | static void | |
fba45db2 | 5854 | info_proc_cmd (char *args, int from_tty) |
c906108c | 5855 | { |
c3f6f71d | 5856 | struct cleanup *old_chain; |
388faa48 MS |
5857 | procinfo *process = NULL; |
5858 | procinfo *thread = NULL; | |
5859 | char **argv = NULL; | |
5860 | char *tmp = NULL; | |
5861 | int pid = 0; | |
5862 | int tid = 0; | |
5863 | int mappings = 0; | |
c906108c | 5864 | |
c3f6f71d JM |
5865 | old_chain = make_cleanup (null_cleanup, 0); |
5866 | if (args) | |
0fda6bd2 | 5867 | { |
d1a41061 PP |
5868 | argv = gdb_buildargv (args); |
5869 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5870 | } |
c3f6f71d JM |
5871 | while (argv != NULL && *argv != NULL) |
5872 | { | |
5873 | if (isdigit (argv[0][0])) | |
5874 | { | |
5875 | pid = strtoul (argv[0], &tmp, 10); | |
5876 | if (*tmp == '/') | |
5877 | tid = strtoul (++tmp, NULL, 10); | |
5878 | } | |
5879 | else if (argv[0][0] == '/') | |
5880 | { | |
5881 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5882 | } | |
388faa48 MS |
5883 | else if (strncmp (argv[0], "mappings", strlen (argv[0])) == 0) |
5884 | { | |
5885 | mappings = 1; | |
5886 | } | |
c3f6f71d JM |
5887 | else |
5888 | { | |
5889 | /* [...] */ | |
5890 | } | |
5891 | argv++; | |
5892 | } | |
5893 | if (pid == 0) | |
39f77062 | 5894 | pid = PIDGET (inferior_ptid); |
c3f6f71d | 5895 | if (pid == 0) |
8a3fe4f8 | 5896 | error (_("No current process: you must name one.")); |
c3f6f71d | 5897 | else |
c906108c | 5898 | { |
c3f6f71d JM |
5899 | /* Have pid, will travel. |
5900 | First see if it's a process we're already debugging. */ | |
5901 | process = find_procinfo (pid, 0); | |
5902 | if (process == NULL) | |
5903 | { | |
19958708 | 5904 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5905 | remember to close it again when finished. */ |
5906 | process = create_procinfo (pid, 0); | |
004527cb | 5907 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5908 | if (!open_procinfo_files (process, FD_CTL)) |
5909 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5910 | } | |
c906108c | 5911 | } |
c3f6f71d JM |
5912 | if (tid != 0) |
5913 | thread = create_procinfo (pid, tid); | |
5914 | ||
5915 | if (process) | |
5916 | { | |
a3f17187 | 5917 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5918 | proc_prettyprint_flags (proc_flags (process), 1); |
5919 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5920 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5921 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5922 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5923 | proc_get_nthreads (process)); |
5924 | } | |
5925 | if (thread) | |
5926 | { | |
a3f17187 | 5927 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5928 | proc_prettyprint_flags (proc_flags (thread), 1); |
5929 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5930 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5931 | } | |
5932 | ||
388faa48 MS |
5933 | if (mappings) |
5934 | { | |
5935 | info_proc_mappings (process, 0); | |
5936 | } | |
5937 | ||
c3f6f71d | 5938 | do_cleanups (old_chain); |
c906108c SS |
5939 | } |
5940 | ||
9185ddce JB |
5941 | /* Modify the status of the system call identified by SYSCALLNUM in |
5942 | the set of syscalls that are currently traced/debugged. | |
5943 | ||
5944 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
5945 | will be updated. Otherwise, the exit syscalls set will be updated. | |
5946 | ||
5947 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they | |
5948 | will be disabled. */ | |
5949 | ||
5950 | static void | |
5951 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
5952 | int mode, int from_tty) | |
5953 | { | |
5954 | sysset_t *sysset; | |
5955 | ||
5956 | if (entry_or_exit == PR_SYSENTRY) | |
5957 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5958 | else | |
5959 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5960 | ||
5961 | if (sysset == NULL) | |
5962 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5963 | ||
5964 | if (mode == FLAG_SET) | |
5965 | gdb_praddsysset (sysset, syscallnum); | |
5966 | else | |
5967 | gdb_prdelsysset (sysset, syscallnum); | |
5968 | ||
5969 | if (entry_or_exit == PR_SYSENTRY) | |
5970 | { | |
5971 | if (!proc_set_traced_sysentry (pi, sysset)) | |
5972 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); | |
5973 | } | |
5974 | else | |
5975 | { | |
5976 | if (!proc_set_traced_sysexit (pi, sysset)) | |
5977 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); | |
5978 | } | |
5979 | } | |
5980 | ||
c3f6f71d | 5981 | static void |
fba45db2 | 5982 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5983 | { |
c3f6f71d | 5984 | procinfo *pi; |
c906108c | 5985 | |
39f77062 | 5986 | if (PIDGET (inferior_ptid) <= 0) |
8a3fe4f8 | 5987 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5988 | |
c3f6f71d | 5989 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5990 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5991 | |
39f77062 | 5992 | pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); |
c3f6f71d JM |
5993 | if (isdigit (args[0])) |
5994 | { | |
9185ddce | 5995 | const int syscallnum = atoi (args); |
c906108c | 5996 | |
9185ddce | 5997 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5998 | } |
5999 | } | |
6000 | ||
19958708 | 6001 | static void |
fba45db2 | 6002 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 6003 | { |
c3f6f71d JM |
6004 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
6005 | } | |
c906108c | 6006 | |
19958708 | 6007 | static void |
fba45db2 | 6008 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
6009 | { |
6010 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 6011 | } |
c906108c | 6012 | |
19958708 | 6013 | static void |
fba45db2 | 6014 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
6015 | { |
6016 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
6017 | } | |
6018 | ||
19958708 | 6019 | static void |
fba45db2 | 6020 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 6021 | { |
c3f6f71d JM |
6022 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
6023 | } | |
c906108c | 6024 | |
c906108c | 6025 | |
c906108c | 6026 | void |
fba45db2 | 6027 | _initialize_procfs (void) |
c906108c | 6028 | { |
27087a3d JB |
6029 | observer_attach_inferior_created (procfs_inferior_created); |
6030 | ||
1bedd215 AC |
6031 | add_info ("proc", info_proc_cmd, _("\ |
6032 | Show /proc process information about any running process.\n\ | |
388faa48 | 6033 | Specify process id, or use the program being debugged by default.\n\ |
1bedd215 | 6034 | Specify keyword 'mappings' for detailed info on memory mappings.")); |
19958708 | 6035 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 6036 | _("Give a trace of entries into the syscall.")); |
19958708 | 6037 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 6038 | _("Give a trace of exits from the syscall.")); |
19958708 | 6039 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 6040 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 6041 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 6042 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
6043 | } |
6044 | ||
6045 | /* =================== END, GDB "MODULE" =================== */ | |
6046 | ||
6047 | ||
6048 | ||
65554fef | 6049 | /* miscellaneous stubs: */ |
c3f6f71d JM |
6050 | /* The following satisfy a few random symbols mostly created by */ |
6051 | /* the solaris threads implementation, which I will chase down */ | |
6052 | /* later. */ | |
6053 | ||
6054 | /* | |
6055 | * Return a pid for which we guarantee | |
6056 | * we will be able to find a 'live' procinfo. | |
6057 | */ | |
6058 | ||
39f77062 | 6059 | ptid_t |
fba45db2 | 6060 | procfs_first_available (void) |
c3f6f71d | 6061 | { |
39f77062 | 6062 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 6063 | } |
be4d1333 MS |
6064 | |
6065 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
65554fef MS |
6066 | #if defined (UNIXWARE) || defined (PIOCOPENLWP) || defined (PCAGENT) |
6067 | /* gcore only implemented on solaris and unixware (so far) */ | |
be4d1333 MS |
6068 | |
6069 | static char * | |
19958708 | 6070 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab PA |
6071 | char *note_data, int *note_size, |
6072 | enum target_signal stop_signal) | |
be4d1333 | 6073 | { |
594f7785 | 6074 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
6075 | gdb_gregset_t gregs; |
6076 | gdb_fpregset_t fpregs; | |
6077 | unsigned long merged_pid; | |
75125405 | 6078 | struct cleanup *old_chain; |
be4d1333 MS |
6079 | |
6080 | merged_pid = TIDGET (ptid) << 16 | PIDGET (ptid); | |
6081 | ||
75125405 DJ |
6082 | /* This part is the old method for fetching registers. |
6083 | It should be replaced by the newer one using regsets | |
6084 | once it is implemented in this platform: | |
6085 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ | |
6086 | ||
6087 | old_chain = save_inferior_ptid (); | |
6088 | inferior_ptid = ptid; | |
6089 | target_fetch_registers (regcache, -1); | |
6090 | ||
594f7785 | 6091 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 6092 | #if defined (NEW_PROC_API) |
65554fef MS |
6093 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
6094 | note_data, | |
6095 | note_size, | |
19958708 | 6096 | merged_pid, |
65554fef MS |
6097 | stop_signal, |
6098 | &gregs); | |
6099 | #else | |
be4d1333 | 6100 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
6101 | note_data, |
6102 | note_size, | |
19958708 | 6103 | merged_pid, |
be4d1333 | 6104 | stop_signal, |
65554fef MS |
6105 | &gregs); |
6106 | #endif | |
594f7785 | 6107 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
6108 | note_data = (char *) elfcore_write_prfpreg (obfd, |
6109 | note_data, | |
6110 | note_size, | |
6111 | &fpregs, | |
6112 | sizeof (fpregs)); | |
75125405 DJ |
6113 | |
6114 | do_cleanups (old_chain); | |
6115 | ||
be4d1333 MS |
6116 | return note_data; |
6117 | } | |
6118 | ||
6119 | struct procfs_corefile_thread_data { | |
6120 | bfd *obfd; | |
6121 | char *note_data; | |
6122 | int *note_size; | |
2020b7ab | 6123 | enum target_signal stop_signal; |
be4d1333 MS |
6124 | }; |
6125 | ||
6126 | static int | |
65554fef | 6127 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
6128 | { |
6129 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 6130 | |
2689673f | 6131 | if (pi != NULL) |
be4d1333 | 6132 | { |
75125405 DJ |
6133 | ptid_t ptid = MERGEPID (pi->pid, thread->tid); |
6134 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, | |
19958708 | 6135 | args->note_data, |
2020b7ab PA |
6136 | args->note_size, |
6137 | args->stop_signal); | |
be4d1333 MS |
6138 | } |
6139 | return 0; | |
6140 | } | |
6141 | ||
a223f1e7 JB |
6142 | static int |
6143 | find_signalled_thread (struct thread_info *info, void *data) | |
6144 | { | |
6145 | if (info->stop_signal != TARGET_SIGNAL_0 | |
6146 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) | |
6147 | return 1; | |
6148 | ||
6149 | return 0; | |
6150 | } | |
6151 | ||
6152 | static enum target_signal | |
6153 | find_stop_signal (void) | |
6154 | { | |
6155 | struct thread_info *info = | |
6156 | iterate_over_threads (find_signalled_thread, NULL); | |
6157 | ||
6158 | if (info) | |
6159 | return info->stop_signal; | |
6160 | else | |
6161 | return TARGET_SIGNAL_0; | |
6162 | } | |
6163 | ||
be4d1333 MS |
6164 | static char * |
6165 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6166 | { | |
6167 | struct cleanup *old_chain; | |
6168 | gdb_gregset_t gregs; | |
6169 | gdb_fpregset_t fpregs; | |
6170 | char fname[16] = {'\0'}; | |
6171 | char psargs[80] = {'\0'}; | |
6172 | procinfo *pi = find_procinfo_or_die (PIDGET (inferior_ptid), 0); | |
6173 | char *note_data = NULL; | |
6dbdc4a3 | 6174 | char *inf_args; |
be4d1333 | 6175 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 6176 | gdb_byte *auxv; |
4e73f23d | 6177 | int auxv_len; |
651c8d2d | 6178 | enum target_signal stop_signal; |
be4d1333 MS |
6179 | |
6180 | if (get_exec_file (0)) | |
6181 | { | |
6182 | strncpy (fname, strrchr (get_exec_file (0), '/') + 1, sizeof (fname)); | |
19958708 | 6183 | strncpy (psargs, get_exec_file (0), |
be4d1333 | 6184 | sizeof (psargs)); |
6dbdc4a3 MS |
6185 | |
6186 | inf_args = get_inferior_args (); | |
6187 | if (inf_args && *inf_args && | |
6188 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 6189 | { |
19958708 | 6190 | strncat (psargs, " ", |
be4d1333 | 6191 | sizeof (psargs) - strlen (psargs)); |
19958708 | 6192 | strncat (psargs, inf_args, |
be4d1333 MS |
6193 | sizeof (psargs) - strlen (psargs)); |
6194 | } | |
6195 | } | |
6196 | ||
19958708 RM |
6197 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
6198 | note_data, | |
6199 | note_size, | |
6200 | fname, | |
be4d1333 MS |
6201 | psargs); |
6202 | ||
651c8d2d PA |
6203 | stop_signal = find_stop_signal (); |
6204 | ||
8903eff6 | 6205 | #ifdef UNIXWARE |
594f7785 | 6206 | fill_gregset (get_current_regcache (), &gregs, -1); |
19958708 RM |
6207 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, |
6208 | PIDGET (inferior_ptid), | |
65554fef MS |
6209 | stop_signal, &gregs); |
6210 | #endif | |
6211 | ||
be4d1333 MS |
6212 | thread_args.obfd = obfd; |
6213 | thread_args.note_data = note_data; | |
6214 | thread_args.note_size = note_size; | |
651c8d2d | 6215 | thread_args.stop_signal = stop_signal; |
65554fef MS |
6216 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, &thread_args); |
6217 | ||
2689673f PA |
6218 | /* There should be always at least one thread. */ |
6219 | gdb_assert (thread_args.note_data != note_data); | |
6220 | note_data = thread_args.note_data; | |
be4d1333 | 6221 | |
13547ab6 DJ |
6222 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
6223 | NULL, &auxv); | |
4e73f23d RM |
6224 | if (auxv_len > 0) |
6225 | { | |
6226 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
6227 | "CORE", NT_AUXV, auxv, auxv_len); | |
6228 | xfree (auxv); | |
6229 | } | |
6230 | ||
be4d1333 MS |
6231 | make_cleanup (xfree, note_data); |
6232 | return note_data; | |
6233 | } | |
65554fef MS |
6234 | #else /* !(Solaris or Unixware) */ |
6235 | static char * | |
6236 | procfs_make_note_section (bfd *obfd, int *note_size) | |
6237 | { | |
8a3fe4f8 | 6238 | error (_("gcore not implemented for this host.")); |
65554fef MS |
6239 | return NULL; /* lint */ |
6240 | } | |
6241 | #endif /* Solaris or Unixware */ | |
be4d1333 | 6242 | /* =================== END GCORE .NOTE "MODULE" =================== */ |