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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
28e7fd62 | 3 | Copyright (C) 1999-2013 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "gdbcore.h" | |
65554fef | 27 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 28 | #include "gdbcmd.h" |
0fda6bd2 | 29 | #include "gdbthread.h" |
7f7fe91e | 30 | #include "regcache.h" |
28439f5e | 31 | #include "inf-child.h" |
c906108c | 32 | |
c3f6f71d | 33 | #if defined (NEW_PROC_API) |
0df8b418 | 34 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 35 | #endif |
c906108c | 36 | |
c3f6f71d | 37 | #include <sys/procfs.h> |
37de36c6 | 38 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 39 | #include <sys/fault.h> |
37de36c6 KB |
40 | #endif |
41 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 42 | #include <sys/syscall.h> |
37de36c6 | 43 | #endif |
c3f6f71d | 44 | #include <sys/errno.h> |
2555fe1a | 45 | #include "gdb_wait.h" |
0fda6bd2 JM |
46 | #include <signal.h> |
47 | #include <ctype.h> | |
92107356 | 48 | #include "gdb_bfd.h" |
19958708 | 49 | #include "gdb_string.h" |
df8f7274 | 50 | #include "gdb_assert.h" |
44270758 | 51 | #include "inflow.h" |
4e73f23d | 52 | #include "auxv.h" |
d1a7880c | 53 | #include "procfs.h" |
27087a3d | 54 | #include "observer.h" |
0fda6bd2 | 55 | |
77382aee PA |
56 | /* This module provides the interface between GDB and the |
57 | /proc file system, which is used on many versions of Unix | |
58 | as a means for debuggers to control other processes. | |
59 | ||
60 | Examples of the systems that use this interface are: | |
61 | ||
62 | Irix | |
63 | Solaris | |
64 | OSF | |
77382aee PA |
65 | AIX5 |
66 | ||
67 | /proc works by imitating a file system: you open a simulated file | |
68 | that represents the process you wish to interact with, and perform | |
69 | operations on that "file" in order to examine or change the state | |
70 | of the other process. | |
71 | ||
72 | The most important thing to know about /proc and this module is | |
73 | that there are two very different interfaces to /proc: | |
74 | ||
75 | One that uses the ioctl system call, and another that uses read | |
76 | and write system calls. | |
77 | ||
78 | This module has to support both /proc interfaces. This means that | |
79 | there are two different ways of doing every basic operation. | |
80 | ||
81 | In order to keep most of the code simple and clean, I have defined | |
82 | an interface "layer" which hides all these system calls. An ifdef | |
83 | (NEW_PROC_API) determines which interface we are using, and most or | |
84 | all occurrances of this ifdef should be confined to this interface | |
85 | layer. */ | |
86 | ||
87 | /* Determine which /proc API we are using: The ioctl API defines | |
88 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 89 | |
c3f6f71d | 90 | #ifdef NEW_PROC_API |
c906108c | 91 | #include <sys/types.h> |
4b14d3e4 | 92 | #include "gdb_dirent.h" /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 93 | #endif |
c906108c | 94 | |
c3f6f71d JM |
95 | #include <fcntl.h> /* for O_RDONLY */ |
96 | #include <unistd.h> /* for "X_OK" */ | |
97 | #include "gdb_stat.h" /* for struct stat */ | |
c906108c | 98 | |
103b3ef5 MS |
99 | /* Note: procfs-utils.h must be included after the above system header |
100 | files, because it redefines various system calls using macros. | |
101 | This may be incompatible with the prototype declarations. */ | |
102 | ||
103b3ef5 MS |
103 | #include "proc-utils.h" |
104 | ||
77382aee | 105 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
106 | #include "gregset.h" |
107 | ||
c3f6f71d | 108 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 109 | |
77382aee | 110 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 111 | |
136d6dae VP |
112 | static void procfs_attach (struct target_ops *, char *, int); |
113 | static void procfs_detach (struct target_ops *, char *, int); | |
28439f5e | 114 | static void procfs_resume (struct target_ops *, |
2ea28649 | 115 | ptid_t, int, enum gdb_signal); |
f9c72d52 | 116 | static void procfs_stop (ptid_t); |
a14ed312 | 117 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
118 | static void procfs_fetch_registers (struct target_ops *, |
119 | struct regcache *, int); | |
120 | static void procfs_store_registers (struct target_ops *, | |
121 | struct regcache *, int); | |
13bdd2e7 | 122 | static void procfs_pass_signals (int, unsigned char *); |
7d85a9c0 | 123 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 124 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 125 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 126 | char *, char **, int); |
117de6a9 | 127 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 128 | ptid_t, struct target_waitstatus *, int); |
0b62613e | 129 | static int procfs_xfer_memory (CORE_ADDR, gdb_byte *, int, int, |
043780a1 AC |
130 | struct mem_attrib *attrib, |
131 | struct target_ops *); | |
4e73f23d RM |
132 | static LONGEST procfs_xfer_partial (struct target_ops *ops, |
133 | enum target_object object, | |
134 | const char *annex, | |
3e43a32a MS |
135 | gdb_byte *readbuf, |
136 | const gdb_byte *writebuf, | |
4e73f23d | 137 | ULONGEST offset, LONGEST len); |
a14ed312 | 138 | |
28439f5e | 139 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 140 | |
d3581e61 JB |
141 | static void procfs_find_new_threads (struct target_ops *ops); |
142 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); | |
c3f6f71d | 143 | |
1a04d88f | 144 | static int proc_find_memory_regions (find_memory_region_ftype, void *); |
be4d1333 MS |
145 | |
146 | static char * procfs_make_note_section (bfd *, int *); | |
147 | ||
1e03ad20 KB |
148 | static int procfs_can_use_hw_breakpoint (int, int, int); |
149 | ||
145b16a9 UW |
150 | static void procfs_info_proc (struct target_ops *, char *, |
151 | enum info_proc_what); | |
152 | ||
c47ffbe3 | 153 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
154 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
155 | is presented in 64-bit format. We need to provide a custom parser | |
156 | to handle that. */ | |
c47ffbe3 VP |
157 | static int |
158 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 159 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 160 | { |
f5656ead | 161 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
162 | gdb_byte *ptr = *readptr; |
163 | ||
164 | if (endptr == ptr) | |
165 | return 0; | |
77382aee | 166 | |
c47ffbe3 VP |
167 | if (endptr - ptr < 8 * 2) |
168 | return -1; | |
169 | ||
e17a4113 | 170 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
171 | ptr += 8; |
172 | /* The size of data is always 64-bit. If the application is 32-bit, | |
173 | it will be zero extended, as expected. */ | |
e17a4113 | 174 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
175 | ptr += 8; |
176 | ||
177 | *readptr = ptr; | |
178 | return 1; | |
179 | } | |
180 | #endif | |
181 | ||
d1a7880c | 182 | struct target_ops * |
28439f5e | 183 | procfs_target (void) |
c3f6f71d | 184 | { |
28439f5e PA |
185 | struct target_ops *t = inf_child_target (); |
186 | ||
77382aee PA |
187 | t->to_shortname = "procfs"; |
188 | t->to_longname = "Unix /proc child process"; | |
189 | t->to_doc = | |
c3f6f71d | 190 | "Unix /proc child process (started by the \"run\" command)."; |
77382aee PA |
191 | t->to_create_inferior = procfs_create_inferior; |
192 | t->to_kill = procfs_kill_inferior; | |
193 | t->to_mourn_inferior = procfs_mourn_inferior; | |
194 | t->to_attach = procfs_attach; | |
195 | t->to_detach = procfs_detach; | |
196 | t->to_wait = procfs_wait; | |
197 | t->to_resume = procfs_resume; | |
198 | t->to_fetch_registers = procfs_fetch_registers; | |
199 | t->to_store_registers = procfs_store_registers; | |
200 | t->to_xfer_partial = procfs_xfer_partial; | |
28439f5e | 201 | t->deprecated_xfer_memory = procfs_xfer_memory; |
2455069d | 202 | t->to_pass_signals = procfs_pass_signals; |
77382aee PA |
203 | t->to_files_info = procfs_files_info; |
204 | t->to_stop = procfs_stop; | |
28439f5e | 205 | |
77382aee PA |
206 | t->to_find_new_threads = procfs_find_new_threads; |
207 | t->to_thread_alive = procfs_thread_alive; | |
208 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 209 | |
77382aee | 210 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
211 | t->to_find_memory_regions = proc_find_memory_regions; |
212 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 213 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
214 | |
215 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 216 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
217 | #endif |
218 | ||
77382aee | 219 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
220 | |
221 | return t; | |
c3f6f71d | 222 | } |
c906108c | 223 | |
c3f6f71d JM |
224 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
225 | ||
77382aee PA |
226 | /* World Unification: |
227 | ||
228 | Put any typedefs, defines etc. here that are required for the | |
229 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
230 | |
231 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 232 | #ifdef WA_READ |
19958708 | 233 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
234 | WRITE_WATCHFLAG = WA_WRITE, |
235 | EXEC_WATCHFLAG = WA_EXEC, | |
236 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
237 | }; | |
238 | #endif | |
239 | #else /* Irix method for watchpoints */ | |
19958708 | 240 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
241 | WRITE_WATCHFLAG = MA_WRITE, |
242 | EXEC_WATCHFLAG = MA_EXEC, | |
243 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
244 | }; | |
245 | #endif | |
246 | ||
37de36c6 KB |
247 | /* gdb_sigset_t */ |
248 | #ifdef HAVE_PR_SIGSET_T | |
249 | typedef pr_sigset_t gdb_sigset_t; | |
250 | #else | |
251 | typedef sigset_t gdb_sigset_t; | |
252 | #endif | |
253 | ||
254 | /* sigaction */ | |
255 | #ifdef HAVE_PR_SIGACTION64_T | |
256 | typedef pr_sigaction64_t gdb_sigaction_t; | |
257 | #else | |
258 | typedef struct sigaction gdb_sigaction_t; | |
259 | #endif | |
260 | ||
261 | /* siginfo */ | |
262 | #ifdef HAVE_PR_SIGINFO64_T | |
263 | typedef pr_siginfo64_t gdb_siginfo_t; | |
264 | #else | |
a5362b9a | 265 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
266 | #endif |
267 | ||
3c95f01c JB |
268 | /* On mips-irix, praddset and prdelset are defined in such a way that |
269 | they return a value, which causes GCC to emit a -Wunused error | |
270 | because the returned value is not used. Prevent this warning | |
271 | by casting the return value to void. On sparc-solaris, this issue | |
272 | does not exist because the definition of these macros already include | |
273 | that cast to void. */ | |
274 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
275 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
276 | ||
37de36c6 KB |
277 | /* gdb_premptysysset */ |
278 | #ifdef premptysysset | |
279 | #define gdb_premptysysset premptysysset | |
280 | #else | |
281 | #define gdb_premptysysset premptyset | |
282 | #endif | |
283 | ||
284 | /* praddsysset */ | |
285 | #ifdef praddsysset | |
286 | #define gdb_praddsysset praddsysset | |
287 | #else | |
3c95f01c | 288 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
289 | #endif |
290 | ||
291 | /* prdelsysset */ | |
292 | #ifdef prdelsysset | |
293 | #define gdb_prdelsysset prdelsysset | |
294 | #else | |
3c95f01c | 295 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
296 | #endif |
297 | ||
298 | /* prissyssetmember */ | |
299 | #ifdef prissyssetmember | |
300 | #define gdb_pr_issyssetmember prissyssetmember | |
301 | #else | |
302 | #define gdb_pr_issyssetmember prismember | |
303 | #endif | |
304 | ||
305 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
306 | as intuitively descriptive as it could be, so we'll define | |
307 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
308 | this writing, this feature is only found on AIX5 systems and | |
309 | basically means that the set of syscalls is not fixed. I.e, | |
310 | there's no nice table that one can #include to get all of the | |
311 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
312 | for each process. We are at least guaranteed that they won't | |
313 | change over the lifetime of the process. But each process could | |
77382aee | 314 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
315 | #ifdef HAVE_PRSYSENT_T |
316 | #define DYNAMIC_SYSCALLS | |
317 | #endif | |
c3f6f71d JM |
318 | |
319 | ||
320 | ||
321 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
322 | ||
323 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
324 | ||
325 | /* The procinfo struct is a wrapper to hold all the state information | |
326 | concerning a /proc process. There should be exactly one procinfo | |
327 | for each process, and since GDB currently can debug only one | |
328 | process at a time, that means there should be only one procinfo. | |
329 | All of the LWP's of a process can be accessed indirectly thru the | |
330 | single process procinfo. | |
331 | ||
332 | However, against the day when GDB may debug more than one process, | |
333 | this data structure is kept in a list (which for now will hold no | |
334 | more than one member), and many functions will have a pointer to a | |
335 | procinfo as an argument. | |
336 | ||
337 | There will be a separate procinfo structure for use by the (not yet | |
338 | implemented) "info proc" command, so that we can print useful | |
339 | information about any random process without interfering with the | |
0df8b418 | 340 | inferior's procinfo information. */ |
c3f6f71d JM |
341 | |
342 | #ifdef NEW_PROC_API | |
343 | /* format strings for /proc paths */ | |
344 | # ifndef CTL_PROC_NAME_FMT | |
345 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
346 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
347 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
348 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
349 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
350 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
351 | # endif | |
352 | /* the name of the proc status struct depends on the implementation */ | |
353 | typedef pstatus_t gdb_prstatus_t; | |
354 | typedef lwpstatus_t gdb_lwpstatus_t; | |
355 | #else /* ! NEW_PROC_API */ | |
356 | /* format strings for /proc paths */ | |
357 | # ifndef CTL_PROC_NAME_FMT | |
358 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
359 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
360 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
361 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
362 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
363 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
364 | # endif | |
0df8b418 | 365 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 366 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
367 | typedef prstatus_t gdb_lwpstatus_t; |
368 | #endif /* NEW_PROC_API */ | |
c906108c | 369 | |
c3f6f71d JM |
370 | typedef struct procinfo { |
371 | struct procinfo *next; | |
372 | int pid; /* Process ID */ | |
373 | int tid; /* Thread/LWP id */ | |
c906108c | 374 | |
c3f6f71d JM |
375 | /* process state */ |
376 | int was_stopped; | |
377 | int ignore_next_sigstop; | |
c906108c | 378 | |
19958708 | 379 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
380 | several different fd's, depending on the version of /proc |
381 | (old ioctl or new read/write). */ | |
c906108c | 382 | |
c3f6f71d | 383 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
384 | |
385 | /* The next three file descriptors are actually only needed in the | |
386 | read/write, multiple-file-descriptor implemenation | |
387 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
388 | code, we will use them uniformly by (in the case of the ioctl | |
389 | single-file-descriptor implementation) filling them with copies | |
390 | of the control fd. */ | |
c3f6f71d JM |
391 | int status_fd; /* File descriptor for /proc status file */ |
392 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 393 | |
c3f6f71d | 394 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 395 | |
c3f6f71d | 396 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
397 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
398 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
399 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
400 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 401 | |
c3f6f71d | 402 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 403 | |
c3f6f71d JM |
404 | #ifndef NEW_PROC_API |
405 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 406 | #endif |
37de36c6 KB |
407 | |
408 | #ifdef DYNAMIC_SYSCALLS | |
409 | int num_syscalls; /* Total number of syscalls */ | |
410 | char **syscall_names; /* Syscall number to name map */ | |
411 | #endif | |
19958708 | 412 | |
c3f6f71d | 413 | struct procinfo *thread_list; |
c906108c | 414 | |
c3f6f71d JM |
415 | int status_valid : 1; |
416 | int gregs_valid : 1; | |
417 | int fpregs_valid : 1; | |
418 | int threads_valid: 1; | |
419 | } procinfo; | |
c906108c | 420 | |
c3f6f71d | 421 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 422 | |
c3f6f71d | 423 | /* Function prototypes for procinfo module: */ |
c906108c | 424 | |
a14ed312 KB |
425 | static procinfo *find_procinfo_or_die (int pid, int tid); |
426 | static procinfo *find_procinfo (int pid, int tid); | |
427 | static procinfo *create_procinfo (int pid, int tid); | |
428 | static void destroy_procinfo (procinfo * p); | |
004527cb | 429 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
430 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
431 | static int open_procinfo_files (procinfo * p, int which); | |
432 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
433 | static int sysset_t_size (procinfo *p); |
434 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
435 | #ifdef DYNAMIC_SYSCALLS | |
436 | static void load_syscalls (procinfo *pi); | |
437 | static void free_syscalls (procinfo *pi); | |
438 | static int find_syscall (procinfo *pi, char *name); | |
439 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 440 | |
e9ef4f39 | 441 | static int iterate_over_mappings |
b8edc417 JK |
442 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
443 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 444 | void *data)); |
e9ef4f39 | 445 | |
c3f6f71d JM |
446 | /* The head of the procinfo list: */ |
447 | static procinfo * procinfo_list; | |
c906108c | 448 | |
77382aee PA |
449 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
450 | not found. */ | |
c906108c | 451 | |
19958708 | 452 | static procinfo * |
fba45db2 | 453 | find_procinfo (int pid, int tid) |
c5aa993b | 454 | { |
c3f6f71d | 455 | procinfo *pi; |
c906108c | 456 | |
c3f6f71d JM |
457 | for (pi = procinfo_list; pi; pi = pi->next) |
458 | if (pi->pid == pid) | |
459 | break; | |
c906108c | 460 | |
c3f6f71d JM |
461 | if (pi) |
462 | if (tid) | |
463 | { | |
464 | /* Don't check threads_valid. If we're updating the | |
465 | thread_list, we want to find whatever threads are already | |
466 | here. This means that in general it is the caller's | |
467 | responsibility to check threads_valid and update before | |
468 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 469 | thread. */ |
c3f6f71d JM |
470 | |
471 | for (pi = pi->thread_list; pi; pi = pi->next) | |
472 | if (pi->tid == tid) | |
473 | break; | |
474 | } | |
c906108c | 475 | |
c3f6f71d JM |
476 | return pi; |
477 | } | |
c906108c | 478 | |
77382aee | 479 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 480 | |
c3f6f71d | 481 | static procinfo * |
fba45db2 | 482 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
483 | { |
484 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 485 | |
c3f6f71d | 486 | if (pi == NULL) |
0fda6bd2 JM |
487 | { |
488 | if (tid) | |
3e43a32a MS |
489 | error (_("procfs: couldn't find pid %d " |
490 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
491 | pid, tid); |
492 | else | |
8a3fe4f8 | 493 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 494 | } |
c3f6f71d JM |
495 | return pi; |
496 | } | |
c906108c | 497 | |
77382aee PA |
498 | /* Wrapper for `open'. The appropriate open call is attempted; if |
499 | unsuccessful, it will be retried as many times as needed for the | |
500 | EAGAIN and EINTR conditions. | |
19958708 | 501 | |
77382aee PA |
502 | For other conditions, retry the open a limited number of times. In |
503 | addition, a short sleep is imposed prior to retrying the open. The | |
504 | reason for this sleep is to give the kernel a chance to catch up | |
505 | and create the file in question in the event that GDB "wins" the | |
506 | race to open a file before the kernel has created it. */ | |
19958708 | 507 | |
4d1bcd09 KB |
508 | static int |
509 | open_with_retry (const char *pathname, int flags) | |
510 | { | |
511 | int retries_remaining, status; | |
512 | ||
513 | retries_remaining = 2; | |
514 | ||
515 | while (1) | |
516 | { | |
517 | status = open (pathname, flags); | |
518 | ||
519 | if (status >= 0 || retries_remaining == 0) | |
520 | break; | |
521 | else if (errno != EINTR && errno != EAGAIN) | |
522 | { | |
523 | retries_remaining--; | |
524 | sleep (1); | |
525 | } | |
526 | } | |
527 | ||
528 | return status; | |
529 | } | |
530 | ||
77382aee PA |
531 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
532 | is defined, we only open the control file descriptor; the others | |
533 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
534 | there is only one real file descriptor, but we keep multiple copies | |
535 | of it so that the code that uses them does not have to be #ifdef'd. | |
536 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 537 | |
c3f6f71d | 538 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 539 | |
c3f6f71d | 540 | static int |
fba45db2 | 541 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 542 | { |
0fda6bd2 | 543 | #ifdef NEW_PROC_API |
c3f6f71d | 544 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 545 | #endif |
c3f6f71d JM |
546 | int fd; |
547 | ||
77382aee PA |
548 | /* This function is getting ALMOST long enough to break up into |
549 | several. Here is some rationale: | |
550 | ||
05b4bd79 | 551 | NEW_PROC_API (Solaris 2.6, Solaris 2.7): |
77382aee PA |
552 | There are several file descriptors that may need to be open |
553 | for any given process or LWP. The ones we're intereted in are: | |
554 | - control (ctl) write-only change the state | |
555 | - status (status) read-only query the state | |
556 | - address space (as) read/write access memory | |
557 | - map (map) read-only virtual addr map | |
558 | Most of these are opened lazily as they are needed. | |
559 | The pathnames for the 'files' for an LWP look slightly | |
560 | different from those of a first-class process: | |
561 | Pathnames for a process (<proc-id>): | |
562 | /proc/<proc-id>/ctl | |
563 | /proc/<proc-id>/status | |
564 | /proc/<proc-id>/as | |
565 | /proc/<proc-id>/map | |
566 | Pathnames for an LWP (lwp-id): | |
567 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
568 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
569 | An LWP has no map or address space file descriptor, since | |
570 | the memory map and address space are shared by all LWPs. | |
571 | ||
572 | Everyone else (Solaris 2.5, Irix, OSF) | |
573 | There is only one file descriptor for each process or LWP. | |
574 | For convenience, we copy the same file descriptor into all | |
575 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
576 | as_fd, see NEW_PROC_API above) so that code that uses them | |
577 | doesn't need any #ifdef's. | |
578 | Pathname for all: | |
579 | /proc/<proc-id> | |
580 | ||
581 | Solaris 2.5 LWP's: | |
582 | Each LWP has an independent file descriptor, but these | |
583 | are not obtained via the 'open' system call like the rest: | |
584 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
585 | to the file descriptor of the parent process. | |
586 | ||
587 | OSF threads: | |
588 | These do not even have their own independent file descriptor. | |
589 | All operations are carried out on the file descriptor of the | |
590 | parent process. Therefore we just call open again for each | |
0df8b418 | 591 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
592 | |
593 | #ifdef NEW_PROC_API | |
77382aee PA |
594 | /* In this case, there are several different file descriptors that |
595 | we might be asked to open. The control file descriptor will be | |
596 | opened early, but the others will be opened lazily as they are | |
597 | needed. */ | |
c3f6f71d JM |
598 | |
599 | strcpy (tmp, pi->pathname); | |
0df8b418 | 600 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
601 | case FD_CTL: |
602 | if (pi->tid) | |
603 | strcat (tmp, "/lwpctl"); | |
604 | else | |
605 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 606 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 607 | if (fd < 0) |
c3f6f71d JM |
608 | return 0; /* fail */ |
609 | pi->ctl_fd = fd; | |
610 | break; | |
611 | case FD_AS: | |
612 | if (pi->tid) | |
0df8b418 | 613 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 614 | strcat (tmp, "/as"); |
4d1bcd09 | 615 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 616 | if (fd < 0) |
c3f6f71d JM |
617 | return 0; /* fail */ |
618 | pi->as_fd = fd; | |
619 | break; | |
620 | case FD_STATUS: | |
621 | if (pi->tid) | |
622 | strcat (tmp, "/lwpstatus"); | |
623 | else | |
624 | strcat (tmp, "/status"); | |
4d1bcd09 | 625 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 626 | if (fd < 0) |
c3f6f71d JM |
627 | return 0; /* fail */ |
628 | pi->status_fd = fd; | |
629 | break; | |
630 | default: | |
631 | return 0; /* unknown file descriptor */ | |
632 | } | |
633 | #else /* not NEW_PROC_API */ | |
77382aee PA |
634 | /* In this case, there is only one file descriptor for each procinfo |
635 | (ie. each process or LWP). In fact, only the file descriptor for | |
636 | the process can actually be opened by an 'open' system call. The | |
637 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
638 | process's file descriptor. | |
639 | ||
640 | For convenience, we copy each procinfo's single file descriptor | |
641 | into all of the fields occupied by the several file descriptors | |
642 | of the NEW_PROC_API implementation. That way, the code that uses | |
643 | them can be written without ifdefs. */ | |
c3f6f71d JM |
644 | |
645 | ||
646 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 647 | /* Only one FD; just open it. */ |
e28cade7 | 648 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 649 | return 0; |
0df8b418 | 650 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
651 | if (pi->tid == 0) /* Master procinfo for the process */ |
652 | { | |
4d1bcd09 | 653 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 654 | if (fd < 0) |
c3f6f71d JM |
655 | return 0; /* fail */ |
656 | } | |
657 | else /* LWP thread procinfo */ | |
658 | { | |
659 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
660 | procinfo *process; | |
661 | int lwpid = pi->tid; | |
662 | ||
0df8b418 | 663 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
664 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
665 | return 0; /* fail */ | |
666 | ||
0df8b418 | 667 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 668 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 669 | return 0; /* fail */ |
0df8b418 MS |
670 | #else /* Irix, other? */ |
671 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
672 | #endif /* Sol 2.5 PIOCOPENLWP */ |
673 | } | |
674 | #endif /* OSF PIOCTSTATUS */ | |
675 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
676 | #endif /* NEW_PROC_API */ | |
c906108c | 677 | |
c3f6f71d JM |
678 | return 1; /* success */ |
679 | } | |
c906108c | 680 | |
77382aee PA |
681 | /* Allocate a data structure and link it into the procinfo list. |
682 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
683 | pointer to new procinfo struct. */ | |
c906108c | 684 | |
c3f6f71d | 685 | static procinfo * |
fba45db2 | 686 | create_procinfo (int pid, int tid) |
c3f6f71d | 687 | { |
0b62613e | 688 | procinfo *pi, *parent = NULL; |
c906108c | 689 | |
0d06e24b | 690 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 691 | return pi; /* Already exists, nothing to do. */ |
c906108c | 692 | |
0df8b418 | 693 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
694 | if (tid != 0) |
695 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
696 | create it if it | |
0df8b418 | 697 | doesn't exist yet? */ |
c906108c | 698 | |
c3f6f71d JM |
699 | pi = (procinfo *) xmalloc (sizeof (procinfo)); |
700 | memset (pi, 0, sizeof (procinfo)); | |
701 | pi->pid = pid; | |
702 | pi->tid = tid; | |
c906108c | 703 | |
37de36c6 KB |
704 | #ifdef DYNAMIC_SYSCALLS |
705 | load_syscalls (pi); | |
706 | #endif | |
707 | ||
1d5e0602 KB |
708 | pi->saved_entryset = sysset_t_alloc (pi); |
709 | pi->saved_exitset = sysset_t_alloc (pi); | |
710 | ||
c3f6f71d JM |
711 | /* Chain into list. */ |
712 | if (tid == 0) | |
713 | { | |
714 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
715 | pi->next = procinfo_list; | |
716 | procinfo_list = pi; | |
717 | } | |
718 | else | |
719 | { | |
720 | #ifdef NEW_PROC_API | |
721 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
722 | #else | |
723 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
724 | #endif | |
725 | pi->next = parent->thread_list; | |
726 | parent->thread_list = pi; | |
727 | } | |
728 | return pi; | |
729 | } | |
c906108c | 730 | |
77382aee | 731 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 732 | |
c3f6f71d | 733 | static void |
fba45db2 | 734 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
735 | { |
736 | if (pi->ctl_fd > 0) | |
737 | close (pi->ctl_fd); | |
738 | #ifdef NEW_PROC_API | |
739 | if (pi->as_fd > 0) | |
740 | close (pi->as_fd); | |
741 | if (pi->status_fd > 0) | |
742 | close (pi->status_fd); | |
743 | #endif | |
744 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
745 | } | |
c906108c | 746 | |
77382aee | 747 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 748 | |
c3f6f71d | 749 | static void |
fba45db2 | 750 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
751 | { |
752 | procinfo *ptr; | |
753 | ||
77382aee | 754 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
755 | if (pi == *list) |
756 | *list = pi->next; | |
19958708 | 757 | else |
c3f6f71d JM |
758 | for (ptr = *list; ptr; ptr = ptr->next) |
759 | if (ptr->next == pi) | |
760 | { | |
761 | ptr->next = pi->next; | |
762 | break; | |
763 | } | |
7a292a7a | 764 | |
77382aee | 765 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 766 | close_procinfo_files (pi); |
7a292a7a | 767 | |
77382aee | 768 | /* Step three: free the memory. */ |
37de36c6 KB |
769 | #ifdef DYNAMIC_SYSCALLS |
770 | free_syscalls (pi); | |
771 | #endif | |
1d5e0602 KB |
772 | xfree (pi->saved_entryset); |
773 | xfree (pi->saved_exitset); | |
b8c9b27d | 774 | xfree (pi); |
c3f6f71d | 775 | } |
c906108c | 776 | |
c3f6f71d | 777 | static void |
fba45db2 | 778 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
779 | { |
780 | procinfo *tmp; | |
c906108c | 781 | |
0df8b418 | 782 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 783 | { |
0df8b418 | 784 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
785 | destroy_one_procinfo (&tmp->thread_list, pi); |
786 | } | |
0df8b418 | 787 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
788 | { |
789 | /* First destroy the children, if any; */ | |
790 | while (pi->thread_list != NULL) | |
791 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
792 | /* Then destroy the parent. Genocide!!! */ | |
793 | destroy_one_procinfo (&procinfo_list, pi); | |
794 | } | |
795 | } | |
c906108c | 796 | |
004527cb AC |
797 | static void |
798 | do_destroy_procinfo_cleanup (void *pi) | |
799 | { | |
800 | destroy_procinfo (pi); | |
801 | } | |
802 | ||
c3f6f71d | 803 | enum { NOKILL, KILL }; |
c906108c | 804 | |
77382aee PA |
805 | /* To be called on a non_recoverable error for a procinfo. Prints |
806 | error messages, optionally sends a SIGKILL to the process, then | |
807 | destroys the data structure. */ | |
c906108c | 808 | |
c3f6f71d | 809 | static void |
fba45db2 | 810 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
811 | { |
812 | char procfile[80]; | |
c906108c | 813 | |
c3f6f71d JM |
814 | if (pi->pathname) |
815 | { | |
816 | print_sys_errmsg (pi->pathname, errno); | |
817 | } | |
818 | else | |
819 | { | |
820 | sprintf (procfile, "process %d", pi->pid); | |
821 | print_sys_errmsg (procfile, errno); | |
822 | } | |
823 | if (kill_p == KILL) | |
824 | kill (pi->pid, SIGKILL); | |
c906108c | 825 | |
c3f6f71d | 826 | destroy_procinfo (pi); |
0b62613e | 827 | error ("%s", msg); |
c3f6f71d | 828 | } |
c906108c | 829 | |
77382aee PA |
830 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
831 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
832 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
833 | |
834 | static int | |
835 | sysset_t_size (procinfo * pi) | |
836 | { | |
837 | #ifndef DYNAMIC_SYSCALLS | |
838 | return sizeof (sysset_t); | |
839 | #else | |
840 | return sizeof (sysset_t) - sizeof (uint64_t) | |
841 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
842 | / (8 * sizeof (uint64_t))); | |
843 | #endif | |
844 | } | |
845 | ||
77382aee | 846 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
847 | |
848 | static sysset_t * | |
849 | sysset_t_alloc (procinfo * pi) | |
850 | { | |
851 | sysset_t *ret; | |
852 | int size = sysset_t_size (pi); | |
f4a14ae6 | 853 | |
37de36c6 KB |
854 | ret = xmalloc (size); |
855 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
856 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
857 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
858 | #endif |
859 | return ret; | |
860 | } | |
861 | ||
862 | #ifdef DYNAMIC_SYSCALLS | |
863 | ||
77382aee | 864 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
865 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
866 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 867 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
868 | |
869 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
870 | #define MAX_SYSCALLS 65536 | |
871 | ||
872 | static void | |
873 | load_syscalls (procinfo *pi) | |
874 | { | |
875 | char pathname[MAX_PROC_NAME_SIZE]; | |
876 | int sysent_fd; | |
877 | prsysent_t header; | |
878 | prsyscall_t *syscalls; | |
879 | int i, size, maxcall; | |
e28cade7 | 880 | struct cleanup *cleanups; |
37de36c6 KB |
881 | |
882 | pi->num_syscalls = 0; | |
883 | pi->syscall_names = 0; | |
884 | ||
77382aee | 885 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 886 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 887 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
888 | if (sysent_fd < 0) |
889 | { | |
8a3fe4f8 | 890 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 891 | } |
e28cade7 | 892 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
893 | |
894 | size = sizeof header - sizeof (prsyscall_t); | |
895 | if (read (sysent_fd, &header, size) != size) | |
896 | { | |
8a3fe4f8 | 897 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
898 | } |
899 | ||
900 | if (header.pr_nsyscalls == 0) | |
901 | { | |
3e43a32a MS |
902 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
903 | pi->pid); | |
37de36c6 KB |
904 | } |
905 | ||
906 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
907 | syscalls = xmalloc (size); | |
e28cade7 | 908 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
909 | |
910 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 911 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
912 | |
913 | /* Find maximum syscall number. This may not be the same as | |
914 | pr_nsyscalls since that value refers to the number of entries | |
915 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 916 | call numbers may be skipped.) */ |
37de36c6 KB |
917 | |
918 | maxcall = syscalls[0].pr_number; | |
919 | ||
920 | for (i = 1; i < header.pr_nsyscalls; i++) | |
921 | if (syscalls[i].pr_number > maxcall | |
77382aee | 922 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
923 | && syscalls[i].pr_number < MAX_SYSCALLS) |
924 | maxcall = syscalls[i].pr_number; | |
925 | ||
926 | pi->num_syscalls = maxcall+1; | |
927 | pi->syscall_names = xmalloc (pi->num_syscalls * sizeof (char *)); | |
928 | ||
929 | for (i = 0; i < pi->num_syscalls; i++) | |
930 | pi->syscall_names[i] = NULL; | |
931 | ||
77382aee | 932 | /* Read the syscall names in. */ |
37de36c6 KB |
933 | for (i = 0; i < header.pr_nsyscalls; i++) |
934 | { | |
935 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
936 | int nread; | |
937 | int callnum; | |
938 | ||
939 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 940 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
941 | || syscalls[i].pr_nameoff <= 0 |
942 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 943 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
944 | continue; |
945 | ||
946 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
947 | if (nread <= 0) | |
948 | continue; | |
949 | ||
950 | callnum = syscalls[i].pr_number; | |
951 | ||
952 | if (pi->syscall_names[callnum] != NULL) | |
953 | { | |
0df8b418 | 954 | /* FIXME: Generate warning. */ |
37de36c6 KB |
955 | continue; |
956 | } | |
957 | ||
958 | namebuf[nread-1] = '\0'; | |
959 | size = strlen (namebuf) + 1; | |
960 | pi->syscall_names[callnum] = xmalloc (size); | |
961 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
962 | pi->syscall_names[callnum][size-1] = '\0'; | |
963 | } | |
19958708 | 964 | |
e28cade7 | 965 | do_cleanups (cleanups); |
37de36c6 KB |
966 | } |
967 | ||
77382aee | 968 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
969 | structure. */ |
970 | ||
971 | static void | |
972 | free_syscalls (procinfo *pi) | |
973 | { | |
974 | if (pi->syscall_names) | |
975 | { | |
976 | int i; | |
977 | ||
978 | for (i = 0; i < pi->num_syscalls; i++) | |
979 | if (pi->syscall_names[i] != NULL) | |
980 | xfree (pi->syscall_names[i]); | |
981 | ||
982 | xfree (pi->syscall_names); | |
983 | pi->syscall_names = 0; | |
984 | } | |
985 | } | |
986 | ||
77382aee | 987 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 988 | If no match is found, return -1. */ |
19958708 | 989 | |
37de36c6 KB |
990 | static int |
991 | find_syscall (procinfo *pi, char *name) | |
992 | { | |
993 | int i; | |
f4a14ae6 | 994 | |
37de36c6 KB |
995 | for (i = 0; i < pi->num_syscalls; i++) |
996 | { | |
997 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
998 | return i; | |
999 | } | |
1000 | return -1; | |
1001 | } | |
1002 | #endif | |
1003 | ||
c3f6f71d | 1004 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 1005 | |
c3f6f71d | 1006 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1007 | |
77382aee PA |
1008 | /* This "module" is the interface layer between the /proc system API |
1009 | and the gdb target vector functions. This layer consists of access | |
1010 | functions that encapsulate each of the basic operations that we | |
1011 | need to use from the /proc API. | |
1012 | ||
1013 | The main motivation for this layer is to hide the fact that there | |
1014 | are two very different implementations of the /proc API. Rather | |
1015 | than have a bunch of #ifdefs all thru the gdb target vector | |
1016 | functions, we do our best to hide them all in here. */ | |
c906108c | 1017 | |
d3581e61 JB |
1018 | static long proc_flags (procinfo * pi); |
1019 | static int proc_why (procinfo * pi); | |
1020 | static int proc_what (procinfo * pi); | |
1021 | static int proc_set_current_signal (procinfo * pi, int signo); | |
1022 | static int proc_get_current_thread (procinfo * pi); | |
1023 | static int proc_iterate_over_threads | |
1024 | (procinfo * pi, | |
1025 | int (*func) (procinfo *, procinfo *, void *), | |
1026 | void *ptr); | |
1027 | ||
1028 | static void | |
fba45db2 | 1029 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1030 | { |
1031 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1032 | print_sys_errmsg (errmsg, errno); | |
1033 | } | |
c906108c | 1034 | |
d3581e61 | 1035 | static void |
fba45db2 | 1036 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1037 | { |
1038 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1039 | perror_with_name (errmsg); | |
1040 | } | |
c906108c | 1041 | |
77382aee PA |
1042 | /* Updates the status struct in the procinfo. There is a 'valid' |
1043 | flag, to let other functions know when this function needs to be | |
1044 | called (so the status is only read when it is needed). The status | |
1045 | file descriptor is also only opened when it is needed. Returns | |
1046 | non-zero for success, zero for failure. */ | |
c906108c | 1047 | |
d3581e61 | 1048 | static int |
fba45db2 | 1049 | proc_get_status (procinfo *pi) |
c3f6f71d | 1050 | { |
0df8b418 | 1051 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1052 | if (pi->status_fd == 0 && |
1053 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1054 | { | |
1055 | pi->status_valid = 0; | |
1056 | return 0; | |
1057 | } | |
c906108c | 1058 | |
c3f6f71d JM |
1059 | #ifdef NEW_PROC_API |
1060 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1061 | pi->status_valid = 0; /* fail */ | |
1062 | else | |
1063 | { | |
19958708 | 1064 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1065 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1066 | if (pi->tid) |
19958708 RM |
1067 | pi->status_valid = (read (pi->status_fd, |
1068 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1069 | sizeof (lwpstatus_t)) |
1070 | == sizeof (lwpstatus_t)); | |
1071 | else | |
1072 | { | |
19958708 | 1073 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1074 | (char *) &pi->prstatus, |
1075 | sizeof (gdb_prstatus_t)) | |
1076 | == sizeof (gdb_prstatus_t)); | |
c3f6f71d JM |
1077 | } |
1078 | } | |
1079 | #else /* ioctl method */ | |
1080 | #ifdef PIOCTSTATUS /* osf */ | |
1081 | if (pi->tid == 0) /* main process */ | |
1082 | { | |
0df8b418 | 1083 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1084 | pi->status_valid = |
c3f6f71d JM |
1085 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | int win; | |
1090 | struct { | |
1091 | long pr_count; | |
1092 | tid_t pr_error_thread; | |
1093 | struct prstatus status; | |
1094 | } thread_status; | |
1095 | ||
1096 | thread_status.pr_count = 1; | |
1097 | thread_status.status.pr_tid = pi->tid; | |
1098 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1099 | if (win) | |
1100 | { | |
19958708 | 1101 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1102 | sizeof (pi->prstatus)); |
1103 | pi->status_valid = 1; | |
1104 | } | |
1105 | } | |
1106 | #else | |
77382aee | 1107 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1108 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1109 | #endif | |
1110 | #endif | |
c906108c | 1111 | |
c3f6f71d JM |
1112 | if (pi->status_valid) |
1113 | { | |
19958708 | 1114 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1115 | proc_why (pi), |
19958708 | 1116 | proc_what (pi), |
c3f6f71d JM |
1117 | proc_get_current_thread (pi)); |
1118 | } | |
c906108c | 1119 | |
77382aee | 1120 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1121 | pi->gregs_valid = pi->status_valid; |
1122 | #ifdef NEW_PROC_API | |
77382aee PA |
1123 | /* In the read/write multiple-fd model, the status struct includes |
1124 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1125 | pi->fpregs_valid = pi->status_valid; |
1126 | #endif | |
77382aee | 1127 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1128 | } |
c906108c | 1129 | |
77382aee | 1130 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 1131 | |
d3581e61 | 1132 | static long |
fba45db2 | 1133 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1134 | { |
1135 | if (!pi->status_valid) | |
1136 | if (!proc_get_status (pi)) | |
0df8b418 | 1137 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1138 | |
c3f6f71d JM |
1139 | #ifdef NEW_PROC_API |
1140 | return pi->prstatus.pr_lwp.pr_flags; | |
1141 | #else | |
1142 | return pi->prstatus.pr_flags; | |
1143 | #endif | |
1144 | } | |
c906108c | 1145 | |
77382aee | 1146 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1147 | |
d3581e61 | 1148 | static int |
fba45db2 | 1149 | proc_why (procinfo *pi) |
c3f6f71d JM |
1150 | { |
1151 | if (!pi->status_valid) | |
1152 | if (!proc_get_status (pi)) | |
0df8b418 | 1153 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1154 | |
c3f6f71d JM |
1155 | #ifdef NEW_PROC_API |
1156 | return pi->prstatus.pr_lwp.pr_why; | |
1157 | #else | |
1158 | return pi->prstatus.pr_why; | |
1159 | #endif | |
1160 | } | |
c906108c | 1161 | |
77382aee | 1162 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1163 | |
d3581e61 | 1164 | static int |
fba45db2 | 1165 | proc_what (procinfo *pi) |
c3f6f71d JM |
1166 | { |
1167 | if (!pi->status_valid) | |
1168 | if (!proc_get_status (pi)) | |
0df8b418 | 1169 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1170 | |
c3f6f71d JM |
1171 | #ifdef NEW_PROC_API |
1172 | return pi->prstatus.pr_lwp.pr_what; | |
1173 | #else | |
1174 | return pi->prstatus.pr_what; | |
c906108c | 1175 | #endif |
c3f6f71d | 1176 | } |
c906108c | 1177 | |
77382aee PA |
1178 | /* This function is only called when PI is stopped by a watchpoint. |
1179 | Assuming the OS supports it, write to *ADDR the data address which | |
1180 | triggered it and return 1. Return 0 if it is not possible to know | |
1181 | the address. */ | |
bf701c2c PM |
1182 | |
1183 | static int | |
1184 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1185 | { | |
1186 | if (!pi->status_valid) | |
1187 | if (!proc_get_status (pi)) | |
1188 | return 0; | |
1189 | ||
1190 | #ifdef NEW_PROC_API | |
f5656ead TT |
1191 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1192 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1193 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
1194 | #else | |
f5656ead TT |
1195 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1196 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1197 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); |
1198 | #endif | |
1199 | return 1; | |
1200 | } | |
1201 | ||
c3f6f71d | 1202 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1203 | |
1204 | /* Returns the pr_nsysarg field (number of args to the current | |
1205 | syscall). */ | |
c3f6f71d | 1206 | |
d3581e61 | 1207 | static int |
fba45db2 | 1208 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1209 | { |
1210 | if (!pi->status_valid) | |
1211 | if (!proc_get_status (pi)) | |
1212 | return 0; | |
19958708 | 1213 | |
c3f6f71d JM |
1214 | #ifdef NEW_PROC_API |
1215 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1216 | #else | |
1217 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1218 | #endif |
c3f6f71d | 1219 | } |
c906108c | 1220 | |
77382aee PA |
1221 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1222 | syscall). */ | |
c906108c | 1223 | |
d3581e61 | 1224 | static long * |
fba45db2 | 1225 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1226 | { |
1227 | if (!pi->status_valid) | |
1228 | if (!proc_get_status (pi)) | |
1229 | return NULL; | |
19958708 | 1230 | |
c3f6f71d JM |
1231 | #ifdef NEW_PROC_API |
1232 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1233 | #else | |
1234 | return (long *) &pi->prstatus.pr_sysarg; | |
1235 | #endif | |
1236 | } | |
c3f6f71d | 1237 | #endif /* PIOCSSPCACT */ |
c906108c | 1238 | |
d3581e61 | 1239 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
77382aee | 1240 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1241 | |
d3581e61 | 1242 | static long |
c3f6f71d JM |
1243 | proc_cursig (struct procinfo *pi) |
1244 | { | |
1245 | if (!pi->status_valid) | |
1246 | if (!proc_get_status (pi)) | |
0df8b418 | 1247 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1248 | |
c3f6f71d JM |
1249 | #ifdef NEW_PROC_API |
1250 | return pi->prstatus.pr_lwp.pr_cursig; | |
1251 | #else | |
1252 | return pi->prstatus.pr_cursig; | |
1253 | #endif | |
1254 | } | |
d3581e61 | 1255 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
c906108c | 1256 | |
77382aee PA |
1257 | /* === I appologize for the messiness of this function. |
1258 | === This is an area where the different versions of | |
1259 | === /proc are more inconsistent than usual. | |
1260 | ||
1261 | Set or reset any of the following process flags: | |
1262 | PR_FORK -- forked child will inherit trace flags | |
1263 | PR_RLC -- traced process runs when last /proc file closed. | |
1264 | PR_KLC -- traced process is killed when last /proc file closed. | |
1265 | PR_ASYNC -- LWP's get to run/stop independently. | |
1266 | ||
1267 | There are three methods for doing this function: | |
1268 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1269 | [Sol6, Sol7, UW] | |
1270 | 2) Middle: PIOCSET/PIOCRESET | |
1271 | [Irix, Sol5] | |
1272 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1273 | [OSF, Sol5] | |
1274 | ||
1275 | Note: Irix does not define PR_ASYNC. | |
1276 | Note: OSF does not define PR_KLC. | |
1277 | Note: OSF is the only one that can ONLY use the oldest method. | |
1278 | ||
1279 | Arguments: | |
1280 | pi -- the procinfo | |
1281 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1282 | mode -- 1 for set, 0 for reset. | |
1283 | ||
1284 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1285 | |
c3f6f71d | 1286 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1287 | |
c3f6f71d | 1288 | static int |
fba45db2 | 1289 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1290 | { |
1291 | long win = 0; /* default to fail */ | |
1292 | ||
77382aee PA |
1293 | /* These operations affect the process as a whole, and applying them |
1294 | to an individual LWP has the same meaning as applying them to the | |
1295 | main process. Therefore, if we're ever called with a pointer to | |
1296 | an LWP's procinfo, let's substitute the process's procinfo and | |
1297 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1298 | |
1299 | if (pi->pid != 0) | |
1300 | pi = find_procinfo_or_die (pi->pid, 0); | |
1301 | ||
05b4bd79 | 1302 | #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */ |
19958708 | 1303 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1304 | (which for no obvious reason has a different definition |
1305 | from one operating system to the next...) */ | |
1306 | #ifdef PCUNSET | |
1307 | #define GDBRESET PCUNSET | |
37de36c6 | 1308 | #else |
c3f6f71d JM |
1309 | #ifdef PCRESET |
1310 | #define GDBRESET PCRESET | |
37de36c6 | 1311 | #endif |
c906108c | 1312 | #endif |
c3f6f71d | 1313 | { |
37de36c6 | 1314 | procfs_ctl_t arg[2]; |
c906108c | 1315 | |
0df8b418 | 1316 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1317 | arg[0] = PCSET; |
0df8b418 | 1318 | else /* Reset the flag. */ |
c3f6f71d | 1319 | arg[0] = GDBRESET; |
c5aa993b | 1320 | |
c3f6f71d JM |
1321 | arg[1] = flag; |
1322 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1323 | } | |
1324 | #else | |
1325 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1326 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1327 | { |
1328 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1329 | } | |
0df8b418 | 1330 | else /* Reset the flag. */ |
c3f6f71d JM |
1331 | { |
1332 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1333 | } | |
c906108c | 1334 | |
c3f6f71d JM |
1335 | #else |
1336 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1337 | switch (flag) { | |
1338 | case PR_RLC: | |
1339 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1340 | { | |
1341 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1342 | } | |
1343 | else /* Clear run-on-last-close */ | |
1344 | { | |
1345 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1346 | } | |
1347 | break; | |
1348 | case PR_FORK: | |
1349 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1350 | { | |
1351 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1352 | } | |
1353 | else /* Clear inherit-on-fork */ | |
1354 | { | |
1355 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1356 | } | |
1357 | break; | |
1358 | default: | |
0df8b418 | 1359 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1360 | break; |
1361 | } | |
1362 | #endif | |
1363 | #endif | |
1364 | #endif | |
1365 | #undef GDBRESET | |
77382aee PA |
1366 | /* The above operation renders the procinfo's cached pstatus |
1367 | obsolete. */ | |
c3f6f71d | 1368 | pi->status_valid = 0; |
c906108c | 1369 | |
c3f6f71d | 1370 | if (!win) |
8a3fe4f8 | 1371 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1372 | flag == PR_FORK ? "PR_FORK" : |
1373 | flag == PR_RLC ? "PR_RLC" : | |
1374 | #ifdef PR_ASYNC | |
1375 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1376 | #endif |
1377 | #ifdef PR_KLC | |
1378 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1379 | #endif |
1380 | "<unknown flag>", | |
1381 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1382 | |
c3f6f71d JM |
1383 | return win; |
1384 | } | |
c906108c | 1385 | |
77382aee PA |
1386 | /* Set the run_on_last_close flag. Process with all threads will |
1387 | become runnable when debugger closes all /proc fds. Returns | |
1388 | non-zero for success, zero for failure. */ | |
c906108c | 1389 | |
d3581e61 | 1390 | static int |
fba45db2 | 1391 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1392 | { |
c3f6f71d JM |
1393 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1394 | } | |
c906108c | 1395 | |
77382aee PA |
1396 | /* Reset the run_on_last_close flag. The process will NOT become |
1397 | runnable when debugger closes its file handles. Returns non-zero | |
1398 | for success, zero for failure. */ | |
c906108c | 1399 | |
d3581e61 | 1400 | static int |
fba45db2 | 1401 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1402 | { |
1403 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1404 | } |
1405 | ||
77382aee PA |
1406 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1407 | are registered for events in the parent, then we will NOT recieve | |
1408 | events from the child. Returns non-zero for success, zero for | |
1409 | failure. */ | |
c906108c | 1410 | |
d3581e61 | 1411 | static int |
fba45db2 | 1412 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1413 | { |
1414 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1415 | } | |
c906108c | 1416 | |
c3f6f71d | 1417 | #ifdef PR_ASYNC |
77382aee PA |
1418 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1419 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1420 | non-zero for success, zero for failure. */ | |
c906108c | 1421 | |
d3581e61 | 1422 | static int |
fba45db2 | 1423 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1424 | { |
1425 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1426 | } | |
c906108c | 1427 | |
77382aee PA |
1428 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1429 | (signal etc.), then all other LWPs will stop as well. Returns | |
1430 | non-zero for success, zero for failure. */ | |
c906108c | 1431 | |
d3581e61 | 1432 | static int |
fba45db2 | 1433 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1434 | { |
1435 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1436 | } | |
1437 | #endif /* PR_ASYNC */ | |
c906108c | 1438 | |
77382aee PA |
1439 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1440 | for success, zero for failure. */ | |
c906108c | 1441 | |
d3581e61 | 1442 | static int |
fba45db2 | 1443 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1444 | { |
1445 | int win; | |
c906108c | 1446 | |
77382aee PA |
1447 | /* We might conceivably apply this operation to an LWP, and the |
1448 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1449 | |
c3f6f71d JM |
1450 | if (pi->ctl_fd == 0 && |
1451 | open_procinfo_files (pi, FD_CTL) == 0) | |
1452 | return 0; | |
1453 | else | |
1454 | { | |
1455 | #ifdef NEW_PROC_API | |
37de36c6 | 1456 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1457 | |
c3f6f71d JM |
1458 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1459 | #else /* ioctl method */ | |
1460 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1461 | /* Note: the call also reads the prstatus. */ | |
1462 | if (win) | |
1463 | { | |
1464 | pi->status_valid = 1; | |
19958708 | 1465 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1466 | proc_why (pi), |
19958708 | 1467 | proc_what (pi), |
c3f6f71d JM |
1468 | proc_get_current_thread (pi)); |
1469 | } | |
1470 | #endif | |
1471 | } | |
c906108c | 1472 | |
c3f6f71d JM |
1473 | return win; |
1474 | } | |
c5aa993b | 1475 | |
77382aee PA |
1476 | /* Wait for the process or LWP to stop (block until it does). Returns |
1477 | non-zero for success, zero for failure. */ | |
c906108c | 1478 | |
d3581e61 | 1479 | static int |
fba45db2 | 1480 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1481 | { |
c3f6f71d JM |
1482 | int win; |
1483 | ||
77382aee PA |
1484 | /* We should never have to apply this operation to any procinfo |
1485 | except the one for the main process. If that ever changes for | |
1486 | any reason, then take out the following clause and replace it | |
1487 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1488 | |
c3f6f71d JM |
1489 | if (pi->tid != 0) |
1490 | pi = find_procinfo_or_die (pi->pid, 0); | |
1491 | ||
1492 | #ifdef NEW_PROC_API | |
1493 | { | |
37de36c6 | 1494 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1495 | |
c3f6f71d JM |
1496 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1497 | /* We been runnin' and we stopped -- need to update status. */ | |
1498 | pi->status_valid = 0; | |
1499 | } | |
1500 | #else /* ioctl method */ | |
1501 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1502 | /* Above call also refreshes the prstatus. */ | |
1503 | if (win) | |
1504 | { | |
1505 | pi->status_valid = 1; | |
19958708 | 1506 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1507 | proc_why (pi), |
19958708 | 1508 | proc_what (pi), |
c3f6f71d JM |
1509 | proc_get_current_thread (pi)); |
1510 | } | |
c906108c SS |
1511 | #endif |
1512 | ||
c3f6f71d | 1513 | return win; |
c906108c SS |
1514 | } |
1515 | ||
77382aee PA |
1516 | /* Make the process or LWP runnable. |
1517 | ||
1518 | Options (not all are implemented): | |
1519 | - single-step | |
1520 | - clear current fault | |
1521 | - clear current signal | |
1522 | - abort the current system call | |
1523 | - stop as soon as finished with system call | |
1524 | - (ioctl): set traced signal set | |
1525 | - (ioctl): set held signal set | |
1526 | - (ioctl): set traced fault set | |
1527 | - (ioctl): set start pc (vaddr) | |
1528 | ||
1529 | Always clears the current fault. PI is the process or LWP to | |
1530 | operate on. If STEP is true, set the process or LWP to trap after | |
1531 | one instruction. If SIGNO is zero, clear the current signal if | |
1532 | any; if non-zero, set the current signal to this one. Returns | |
1533 | non-zero for success, zero for failure. */ | |
c3f6f71d | 1534 | |
d3581e61 | 1535 | static int |
fba45db2 | 1536 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1537 | { |
1538 | int win; | |
1539 | int runflags; | |
1540 | ||
77382aee PA |
1541 | /* We will probably have to apply this operation to individual |
1542 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1543 | |
c3f6f71d JM |
1544 | if (pi->ctl_fd == 0 && |
1545 | open_procinfo_files (pi, FD_CTL) == 0) | |
1546 | { | |
1547 | return 0; | |
1548 | } | |
c906108c | 1549 | |
0df8b418 | 1550 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1551 | if (step) |
1552 | runflags |= PRSTEP; | |
1553 | if (signo == 0) | |
1554 | runflags |= PRCSIG; | |
0df8b418 | 1555 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1556 | proc_set_current_signal (pi, signo); |
c5aa993b | 1557 | |
c3f6f71d JM |
1558 | #ifdef NEW_PROC_API |
1559 | { | |
37de36c6 | 1560 | procfs_ctl_t cmd[2]; |
c906108c | 1561 | |
c3f6f71d JM |
1562 | cmd[0] = PCRUN; |
1563 | cmd[1] = runflags; | |
1564 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1565 | } | |
1566 | #else /* ioctl method */ | |
1567 | { | |
1568 | prrun_t prrun; | |
c906108c | 1569 | |
c3f6f71d JM |
1570 | memset (&prrun, 0, sizeof (prrun)); |
1571 | prrun.pr_flags = runflags; | |
1572 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1573 | } | |
1574 | #endif | |
c906108c | 1575 | |
c3f6f71d JM |
1576 | return win; |
1577 | } | |
c906108c | 1578 | |
77382aee PA |
1579 | /* Register to trace signals in the process or LWP. Returns non-zero |
1580 | for success, zero for failure. */ | |
c906108c | 1581 | |
d3581e61 | 1582 | static int |
37de36c6 | 1583 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1584 | { |
c3f6f71d JM |
1585 | int win; |
1586 | ||
77382aee PA |
1587 | /* We should never have to apply this operation to any procinfo |
1588 | except the one for the main process. If that ever changes for | |
1589 | any reason, then take out the following clause and replace it | |
1590 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1591 | |
c3f6f71d JM |
1592 | if (pi->tid != 0) |
1593 | pi = find_procinfo_or_die (pi->pid, 0); | |
1594 | ||
1595 | #ifdef NEW_PROC_API | |
1596 | { | |
1597 | struct { | |
37de36c6 | 1598 | procfs_ctl_t cmd; |
c3f6f71d | 1599 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1600 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1601 | } arg; |
c906108c | 1602 | |
c3f6f71d | 1603 | arg.cmd = PCSTRACE; |
37de36c6 | 1604 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1605 | |
c3f6f71d JM |
1606 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1607 | } | |
1608 | #else /* ioctl method */ | |
1609 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1610 | #endif | |
0df8b418 | 1611 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1612 | pi->status_valid = 0; |
c906108c | 1613 | |
c3f6f71d | 1614 | if (!win) |
8a3fe4f8 | 1615 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1616 | return win; |
c906108c SS |
1617 | } |
1618 | ||
77382aee PA |
1619 | /* Register to trace hardware faults in the process or LWP. Returns |
1620 | non-zero for success, zero for failure. */ | |
c906108c | 1621 | |
d3581e61 | 1622 | static int |
fba45db2 | 1623 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1624 | { |
1625 | int win; | |
1626 | ||
77382aee PA |
1627 | /* We should never have to apply this operation to any procinfo |
1628 | except the one for the main process. If that ever changes for | |
1629 | any reason, then take out the following clause and replace it | |
1630 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1631 | |
c3f6f71d JM |
1632 | if (pi->tid != 0) |
1633 | pi = find_procinfo_or_die (pi->pid, 0); | |
1634 | ||
1635 | #ifdef NEW_PROC_API | |
1636 | { | |
1637 | struct { | |
37de36c6 | 1638 | procfs_ctl_t cmd; |
c3f6f71d JM |
1639 | /* Use char array to avoid alignment issues. */ |
1640 | char fltset[sizeof (fltset_t)]; | |
1641 | } arg; | |
c906108c | 1642 | |
c3f6f71d JM |
1643 | arg.cmd = PCSFAULT; |
1644 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1645 | |
c3f6f71d JM |
1646 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1647 | } | |
1648 | #else /* ioctl method */ | |
1649 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1650 | #endif | |
0df8b418 | 1651 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1652 | pi->status_valid = 0; |
c906108c | 1653 | |
c3f6f71d JM |
1654 | return win; |
1655 | } | |
c5aa993b | 1656 | |
77382aee PA |
1657 | /* Register to trace entry to system calls in the process or LWP. |
1658 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1659 | |
d3581e61 | 1660 | static int |
fba45db2 | 1661 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1662 | { |
c3f6f71d JM |
1663 | int win; |
1664 | ||
77382aee PA |
1665 | /* We should never have to apply this operation to any procinfo |
1666 | except the one for the main process. If that ever changes for | |
1667 | any reason, then take out the following clause and replace it | |
1668 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1669 | |
c3f6f71d JM |
1670 | if (pi->tid != 0) |
1671 | pi = find_procinfo_or_die (pi->pid, 0); | |
1672 | ||
1673 | #ifdef NEW_PROC_API | |
1674 | { | |
37de36c6 KB |
1675 | struct gdb_proc_ctl_pcsentry { |
1676 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1677 | /* Use char array to avoid alignment issues. */ |
1678 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1679 | } *argp; |
1680 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1681 | - sizeof (sysset_t) |
37de36c6 | 1682 | + sysset_t_size (pi); |
c3f6f71d | 1683 | |
37de36c6 | 1684 | argp = xmalloc (argp_size); |
c3f6f71d | 1685 | |
37de36c6 KB |
1686 | argp->cmd = PCSENTRY; |
1687 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1688 | ||
1689 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1690 | xfree (argp); | |
c3f6f71d JM |
1691 | } |
1692 | #else /* ioctl method */ | |
1693 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1694 | #endif | |
77382aee PA |
1695 | /* The above operation renders the procinfo's cached pstatus |
1696 | obsolete. */ | |
c3f6f71d | 1697 | pi->status_valid = 0; |
19958708 | 1698 | |
c3f6f71d | 1699 | return win; |
c906108c SS |
1700 | } |
1701 | ||
77382aee PA |
1702 | /* Register to trace exit from system calls in the process or LWP. |
1703 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1704 | |
d3581e61 | 1705 | static int |
fba45db2 | 1706 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1707 | { |
1708 | int win; | |
1709 | ||
77382aee PA |
1710 | /* We should never have to apply this operation to any procinfo |
1711 | except the one for the main process. If that ever changes for | |
1712 | any reason, then take out the following clause and replace it | |
1713 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1714 | |
c3f6f71d JM |
1715 | if (pi->tid != 0) |
1716 | pi = find_procinfo_or_die (pi->pid, 0); | |
1717 | ||
1718 | #ifdef NEW_PROC_API | |
1719 | { | |
37de36c6 KB |
1720 | struct gdb_proc_ctl_pcsexit { |
1721 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1722 | /* Use char array to avoid alignment issues. */ |
1723 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1724 | } *argp; |
1725 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1726 | - sizeof (sysset_t) |
37de36c6 | 1727 | + sysset_t_size (pi); |
c906108c | 1728 | |
37de36c6 | 1729 | argp = xmalloc (argp_size); |
c906108c | 1730 | |
37de36c6 KB |
1731 | argp->cmd = PCSEXIT; |
1732 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1733 | ||
1734 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1735 | xfree (argp); | |
c3f6f71d JM |
1736 | } |
1737 | #else /* ioctl method */ | |
1738 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1739 | #endif | |
77382aee PA |
1740 | /* The above operation renders the procinfo's cached pstatus |
1741 | obsolete. */ | |
c3f6f71d | 1742 | pi->status_valid = 0; |
c906108c | 1743 | |
c3f6f71d JM |
1744 | return win; |
1745 | } | |
c906108c | 1746 | |
77382aee PA |
1747 | /* Specify the set of blocked / held signals in the process or LWP. |
1748 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1749 | |
d3581e61 | 1750 | static int |
37de36c6 | 1751 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1752 | { |
c3f6f71d JM |
1753 | int win; |
1754 | ||
77382aee PA |
1755 | /* We should never have to apply this operation to any procinfo |
1756 | except the one for the main process. If that ever changes for | |
1757 | any reason, then take out the following clause and replace it | |
1758 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1759 | |
c3f6f71d JM |
1760 | if (pi->tid != 0) |
1761 | pi = find_procinfo_or_die (pi->pid, 0); | |
1762 | ||
1763 | #ifdef NEW_PROC_API | |
1764 | { | |
1765 | struct { | |
37de36c6 | 1766 | procfs_ctl_t cmd; |
c3f6f71d | 1767 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1768 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1769 | } arg; |
1770 | ||
1771 | arg.cmd = PCSHOLD; | |
37de36c6 | 1772 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1773 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1774 | } | |
c906108c | 1775 | #else |
c3f6f71d | 1776 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1777 | #endif |
77382aee PA |
1778 | /* The above operation renders the procinfo's cached pstatus |
1779 | obsolete. */ | |
c3f6f71d JM |
1780 | pi->status_valid = 0; |
1781 | ||
1782 | return win; | |
c906108c SS |
1783 | } |
1784 | ||
77382aee PA |
1785 | /* Returns the set of signals that are held / blocked. Will also copy |
1786 | the sigset if SAVE is non-zero. */ | |
c906108c | 1787 | |
d3581e61 | 1788 | static gdb_sigset_t * |
37de36c6 | 1789 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1790 | { |
37de36c6 | 1791 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1792 | |
77382aee PA |
1793 | /* We should never have to apply this operation to any procinfo |
1794 | except the one for the main process. If that ever changes for | |
1795 | any reason, then take out the following clause and replace it | |
1796 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1797 | |
c3f6f71d JM |
1798 | if (pi->tid != 0) |
1799 | pi = find_procinfo_or_die (pi->pid, 0); | |
1800 | ||
1801 | #ifdef NEW_PROC_API | |
1802 | if (!pi->status_valid) | |
1803 | if (!proc_get_status (pi)) | |
1804 | return NULL; | |
1805 | ||
c3f6f71d | 1806 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d JM |
1807 | #else /* not NEW_PROC_API */ |
1808 | { | |
37de36c6 | 1809 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1810 | |
1811 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1812 | ret = &sigheld; | |
1813 | } | |
1814 | #endif /* NEW_PROC_API */ | |
1815 | if (save && ret) | |
37de36c6 | 1816 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1817 | |
1818 | return ret; | |
c906108c SS |
1819 | } |
1820 | ||
77382aee PA |
1821 | /* Returns the set of signals that are traced / debugged. Will also |
1822 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1823 | |
d3581e61 | 1824 | static gdb_sigset_t * |
37de36c6 | 1825 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1826 | { |
37de36c6 | 1827 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1828 | |
77382aee PA |
1829 | /* We should never have to apply this operation to any procinfo |
1830 | except the one for the main process. If that ever changes for | |
1831 | any reason, then take out the following clause and replace it | |
1832 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1833 | |
c3f6f71d JM |
1834 | if (pi->tid != 0) |
1835 | pi = find_procinfo_or_die (pi->pid, 0); | |
1836 | ||
1837 | #ifdef NEW_PROC_API | |
1838 | if (!pi->status_valid) | |
1839 | if (!proc_get_status (pi)) | |
1840 | return NULL; | |
1841 | ||
1842 | ret = &pi->prstatus.pr_sigtrace; | |
1843 | #else | |
1844 | { | |
37de36c6 | 1845 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
1846 | |
1847 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1848 | ret = &sigtrace; | |
1849 | } | |
c906108c | 1850 | #endif |
c3f6f71d | 1851 | if (save && ret) |
37de36c6 | 1852 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1853 | |
c3f6f71d JM |
1854 | return ret; |
1855 | } | |
c906108c | 1856 | |
77382aee PA |
1857 | /* Returns the set of hardware faults that are traced /debugged. Will |
1858 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1859 | |
d3581e61 | 1860 | static fltset_t * |
fba45db2 | 1861 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1862 | { |
1863 | fltset_t *ret = NULL; | |
1864 | ||
77382aee PA |
1865 | /* We should never have to apply this operation to any procinfo |
1866 | except the one for the main process. If that ever changes for | |
1867 | any reason, then take out the following clause and replace it | |
1868 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1869 | |
c3f6f71d JM |
1870 | if (pi->tid != 0) |
1871 | pi = find_procinfo_or_die (pi->pid, 0); | |
1872 | ||
1873 | #ifdef NEW_PROC_API | |
1874 | if (!pi->status_valid) | |
1875 | if (!proc_get_status (pi)) | |
1876 | return NULL; | |
1877 | ||
1878 | ret = &pi->prstatus.pr_flttrace; | |
1879 | #else | |
1880 | { | |
1881 | static fltset_t flttrace; | |
1882 | ||
1883 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1884 | ret = &flttrace; | |
1885 | } | |
1886 | #endif | |
1887 | if (save && ret) | |
1888 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1889 | |
c3f6f71d JM |
1890 | return ret; |
1891 | } | |
c906108c | 1892 | |
77382aee PA |
1893 | /* Returns the set of syscalls that are traced /debugged on entry. |
1894 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1895 | |
d3581e61 | 1896 | static sysset_t * |
fba45db2 | 1897 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1898 | { |
1899 | sysset_t *ret = NULL; | |
1900 | ||
77382aee PA |
1901 | /* We should never have to apply this operation to any procinfo |
1902 | except the one for the main process. If that ever changes for | |
1903 | any reason, then take out the following clause and replace it | |
1904 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1905 | |
c3f6f71d JM |
1906 | if (pi->tid != 0) |
1907 | pi = find_procinfo_or_die (pi->pid, 0); | |
1908 | ||
1909 | #ifdef NEW_PROC_API | |
1910 | if (!pi->status_valid) | |
1911 | if (!proc_get_status (pi)) | |
1912 | return NULL; | |
1913 | ||
37de36c6 | 1914 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1915 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
1916 | #else /* DYNAMIC_SYSCALLS */ |
1917 | { | |
1918 | static sysset_t *sysentry; | |
1919 | size_t size; | |
1920 | ||
1921 | if (!sysentry) | |
1922 | sysentry = sysset_t_alloc (pi); | |
1923 | ret = sysentry; | |
1924 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1925 | return NULL; | |
1926 | if (pi->prstatus.pr_sysentry_offset == 0) | |
1927 | { | |
1928 | gdb_premptysysset (sysentry); | |
1929 | } | |
1930 | else | |
1931 | { | |
1932 | int rsize; | |
1933 | ||
1934 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 1935 | SEEK_SET) |
37de36c6 KB |
1936 | != (off_t) pi->prstatus.pr_sysentry_offset) |
1937 | return NULL; | |
1938 | size = sysset_t_size (pi); | |
1939 | gdb_premptysysset (sysentry); | |
1940 | rsize = read (pi->status_fd, sysentry, size); | |
1941 | if (rsize < 0) | |
1942 | return NULL; | |
1943 | } | |
1944 | } | |
1945 | #endif /* DYNAMIC_SYSCALLS */ | |
1946 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
1947 | { |
1948 | static sysset_t sysentry; | |
c906108c | 1949 | |
c3f6f71d JM |
1950 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1951 | ret = &sysentry; | |
1952 | } | |
37de36c6 | 1953 | #endif /* NEW_PROC_API */ |
c3f6f71d | 1954 | if (save && ret) |
37de36c6 | 1955 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 1956 | |
c3f6f71d JM |
1957 | return ret; |
1958 | } | |
c5aa993b | 1959 | |
77382aee PA |
1960 | /* Returns the set of syscalls that are traced /debugged on exit. |
1961 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1962 | |
d3581e61 | 1963 | static sysset_t * |
fba45db2 | 1964 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1965 | { |
c3f6f71d JM |
1966 | sysset_t * ret = NULL; |
1967 | ||
77382aee PA |
1968 | /* We should never have to apply this operation to any procinfo |
1969 | except the one for the main process. If that ever changes for | |
1970 | any reason, then take out the following clause and replace it | |
1971 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1972 | |
c3f6f71d JM |
1973 | if (pi->tid != 0) |
1974 | pi = find_procinfo_or_die (pi->pid, 0); | |
1975 | ||
1976 | #ifdef NEW_PROC_API | |
1977 | if (!pi->status_valid) | |
1978 | if (!proc_get_status (pi)) | |
1979 | return NULL; | |
1980 | ||
37de36c6 | 1981 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1982 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
1983 | #else /* DYNAMIC_SYSCALLS */ |
1984 | { | |
1985 | static sysset_t *sysexit; | |
1986 | size_t size; | |
1987 | ||
1988 | if (!sysexit) | |
1989 | sysexit = sysset_t_alloc (pi); | |
1990 | ret = sysexit; | |
1991 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1992 | return NULL; | |
1993 | if (pi->prstatus.pr_sysexit_offset == 0) | |
1994 | { | |
1995 | gdb_premptysysset (sysexit); | |
1996 | } | |
1997 | else | |
1998 | { | |
1999 | int rsize; | |
2000 | ||
77382aee PA |
2001 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
2002 | SEEK_SET) | |
37de36c6 KB |
2003 | != (off_t) pi->prstatus.pr_sysexit_offset) |
2004 | return NULL; | |
2005 | size = sysset_t_size (pi); | |
2006 | gdb_premptysysset (sysexit); | |
2007 | rsize = read (pi->status_fd, sysexit, size); | |
2008 | if (rsize < 0) | |
2009 | return NULL; | |
2010 | } | |
2011 | } | |
2012 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2013 | #else |
2014 | { | |
2015 | static sysset_t sysexit; | |
c5aa993b | 2016 | |
c3f6f71d JM |
2017 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2018 | ret = &sysexit; | |
2019 | } | |
2020 | #endif | |
2021 | if (save && ret) | |
37de36c6 | 2022 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2023 | |
2024 | return ret; | |
2025 | } | |
c906108c | 2026 | |
77382aee PA |
2027 | /* The current fault (if any) is cleared; the associated signal will |
2028 | not be sent to the process or LWP when it resumes. Returns | |
2029 | non-zero for success, zero for failure. */ | |
c906108c | 2030 | |
d3581e61 | 2031 | static int |
fba45db2 | 2032 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2033 | { |
2034 | int win; | |
2035 | ||
77382aee PA |
2036 | /* We should never have to apply this operation to any procinfo |
2037 | except the one for the main process. If that ever changes for | |
2038 | any reason, then take out the following clause and replace it | |
2039 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2040 | |
c3f6f71d JM |
2041 | if (pi->tid != 0) |
2042 | pi = find_procinfo_or_die (pi->pid, 0); | |
2043 | ||
2044 | #ifdef NEW_PROC_API | |
2045 | { | |
37de36c6 | 2046 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2047 | |
c3f6f71d JM |
2048 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2049 | } | |
2050 | #else | |
2051 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2052 | #endif | |
2053 | ||
2054 | return win; | |
c906108c SS |
2055 | } |
2056 | ||
77382aee PA |
2057 | /* Set the "current signal" that will be delivered next to the |
2058 | process. NOTE: semantics are different from those of KILL. This | |
2059 | signal will be delivered to the process or LWP immediately when it | |
2060 | is resumed (even if the signal is held/blocked); it will NOT | |
2061 | immediately cause another event of interest, and will NOT first | |
2062 | trap back to the debugger. Returns non-zero for success, zero for | |
2063 | failure. */ | |
c3f6f71d | 2064 | |
d3581e61 | 2065 | static int |
fba45db2 | 2066 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2067 | { |
2068 | int win; | |
2069 | struct { | |
37de36c6 | 2070 | procfs_ctl_t cmd; |
c3f6f71d | 2071 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2072 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2073 | } arg; |
73930d4d | 2074 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2075 | ptid_t wait_ptid; |
2076 | struct target_waitstatus wait_status; | |
c3f6f71d | 2077 | |
77382aee PA |
2078 | /* We should never have to apply this operation to any procinfo |
2079 | except the one for the main process. If that ever changes for | |
2080 | any reason, then take out the following clause and replace it | |
2081 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2082 | |
c3f6f71d JM |
2083 | if (pi->tid != 0) |
2084 | pi = find_procinfo_or_die (pi->pid, 0); | |
2085 | ||
2086 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2087 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2088 | receives a PIOCSSIG with a signal identical to the current |
2089 | signal, it messes up the current signal. Work around the kernel | |
2090 | bug. */ | |
c3f6f71d JM |
2091 | if (signo > 0 && |
2092 | signo == proc_cursig (pi)) | |
0df8b418 | 2093 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2094 | #endif |
2095 | ||
2096 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2097 | get_last_target_status (&wait_ptid, &wait_status); |
2098 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2099 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 2100 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 JM |
2101 | && proc_get_status (pi) |
2102 | #ifdef NEW_PROC_API | |
2103 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2104 | #else | |
2105 | && pi->prstatus.pr_info.si_signo == signo | |
2106 | #endif | |
2107 | ) | |
2108 | /* Use the siginfo associated with the signal being | |
2109 | redelivered. */ | |
2110 | #ifdef NEW_PROC_API | |
73930d4d | 2111 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2112 | #else |
73930d4d | 2113 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2114 | #endif |
2115 | else | |
2116 | { | |
73930d4d KH |
2117 | mysinfo.si_signo = signo; |
2118 | mysinfo.si_code = 0; | |
2119 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2120 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2121 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2122 | } |
c3f6f71d JM |
2123 | |
2124 | #ifdef NEW_PROC_API | |
2125 | arg.cmd = PCSSIG; | |
2126 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2127 | #else | |
2128 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2129 | #endif | |
c906108c | 2130 | |
c3f6f71d JM |
2131 | return win; |
2132 | } | |
c906108c | 2133 | |
77382aee PA |
2134 | /* The current signal (if any) is cleared, and is not sent to the |
2135 | process or LWP when it resumes. Returns non-zero for success, zero | |
2136 | for failure. */ | |
c906108c | 2137 | |
d3581e61 | 2138 | static int |
fba45db2 | 2139 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2140 | { |
2141 | int win; | |
2142 | ||
77382aee PA |
2143 | /* We should never have to apply this operation to any procinfo |
2144 | except the one for the main process. If that ever changes for | |
2145 | any reason, then take out the following clause and replace it | |
2146 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2147 | |
c3f6f71d JM |
2148 | if (pi->tid != 0) |
2149 | pi = find_procinfo_or_die (pi->pid, 0); | |
2150 | ||
2151 | #ifdef NEW_PROC_API | |
2152 | { | |
2153 | struct { | |
37de36c6 | 2154 | procfs_ctl_t cmd; |
c3f6f71d | 2155 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2156 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2157 | } arg; |
73930d4d | 2158 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2159 | |
2160 | arg.cmd = PCSSIG; | |
2161 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2162 | mysinfo.si_signo = 0; |
2163 | mysinfo.si_code = 0; | |
2164 | mysinfo.si_errno = 0; | |
2165 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2166 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2167 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2168 | |
2169 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2170 | } | |
2171 | #else | |
2172 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2173 | #endif | |
c906108c | 2174 | |
c3f6f71d JM |
2175 | return win; |
2176 | } | |
c906108c | 2177 | |
772cf8be MK |
2178 | /* Return the general-purpose registers for the process or LWP |
2179 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2180 | |
d3581e61 | 2181 | static gdb_gregset_t * |
fba45db2 | 2182 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2183 | { |
2184 | if (!pi->status_valid || !pi->gregs_valid) | |
2185 | if (!proc_get_status (pi)) | |
2186 | return NULL; | |
2187 | ||
c3f6f71d | 2188 | #ifdef NEW_PROC_API |
c3f6f71d | 2189 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be | 2190 | #else |
c3f6f71d | 2191 | return &pi->prstatus.pr_reg; |
772cf8be | 2192 | #endif |
c3f6f71d | 2193 | } |
c5aa993b | 2194 | |
772cf8be MK |
2195 | /* Return the general-purpose registers for the process or LWP |
2196 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2197 | |
d3581e61 | 2198 | static gdb_fpregset_t * |
fba45db2 | 2199 | proc_get_fpregs (procinfo *pi) |
c906108c | 2200 | { |
c3f6f71d JM |
2201 | #ifdef NEW_PROC_API |
2202 | if (!pi->status_valid || !pi->fpregs_valid) | |
2203 | if (!proc_get_status (pi)) | |
2204 | return NULL; | |
2205 | ||
c3f6f71d | 2206 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c5aa993b | 2207 | |
772cf8be | 2208 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2209 | if (pi->fpregs_valid) |
772cf8be | 2210 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2211 | else |
c906108c | 2212 | { |
772cf8be | 2213 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2214 | { |
c3f6f71d | 2215 | return NULL; |
c906108c | 2216 | } |
c3f6f71d | 2217 | else |
c906108c | 2218 | { |
772cf8be | 2219 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2220 | struct { |
2221 | long pr_count; | |
2222 | tid_t pr_error_thread; | |
2223 | tfpregset_t thread_1; | |
2224 | } thread_fpregs; | |
2225 | ||
2226 | thread_fpregs.pr_count = 1; | |
2227 | thread_fpregs.thread_1.tid = pi->tid; | |
2228 | ||
772cf8be MK |
2229 | if (pi->tid == 0 |
2230 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2231 | { |
2232 | pi->fpregs_valid = 1; | |
772cf8be | 2233 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2234 | } |
772cf8be MK |
2235 | else if (pi->tid != 0 |
2236 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2237 | { |
2238 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2239 | sizeof (pi->fpregset)); | |
2240 | pi->fpregs_valid = 1; | |
772cf8be | 2241 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2242 | } |
2243 | else | |
2244 | { | |
2245 | return NULL; | |
2246 | } | |
772cf8be | 2247 | # else |
c3f6f71d JM |
2248 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2249 | { | |
2250 | pi->fpregs_valid = 1; | |
772cf8be | 2251 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2252 | } |
2253 | else | |
2254 | { | |
2255 | return NULL; | |
2256 | } | |
772cf8be | 2257 | # endif |
c906108c | 2258 | } |
c906108c | 2259 | } |
772cf8be | 2260 | #endif /* NEW_PROC_API */ |
c906108c SS |
2261 | } |
2262 | ||
772cf8be MK |
2263 | /* Write the general-purpose registers back to the process or LWP |
2264 | corresponding to PI. Return non-zero for success, zero for | |
2265 | failure. */ | |
c3f6f71d | 2266 | |
d3581e61 | 2267 | static int |
fba45db2 | 2268 | proc_set_gregs (procinfo *pi) |
c906108c | 2269 | { |
c3f6f71d JM |
2270 | gdb_gregset_t *gregs; |
2271 | int win; | |
c5aa993b | 2272 | |
772cf8be MK |
2273 | gregs = proc_get_gregs (pi); |
2274 | if (gregs == NULL) | |
2275 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2276 | |
772cf8be | 2277 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2278 | { |
c3f6f71d | 2279 | return 0; |
c906108c | 2280 | } |
c3f6f71d | 2281 | else |
c906108c | 2282 | { |
c3f6f71d JM |
2283 | #ifdef NEW_PROC_API |
2284 | struct { | |
37de36c6 | 2285 | procfs_ctl_t cmd; |
c3f6f71d JM |
2286 | /* Use char array to avoid alignment issues. */ |
2287 | char gregs[sizeof (gdb_gregset_t)]; | |
2288 | } arg; | |
2289 | ||
772cf8be | 2290 | arg.cmd = PCSREG; |
c3f6f71d JM |
2291 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2292 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2293 | #else | |
2294 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2295 | #endif | |
c906108c | 2296 | } |
c3f6f71d | 2297 | |
772cf8be | 2298 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2299 | pi->gregs_valid = 0; |
2300 | return win; | |
c906108c SS |
2301 | } |
2302 | ||
772cf8be MK |
2303 | /* Write the floating-pointer registers back to the process or LWP |
2304 | corresponding to PI. Return non-zero for success, zero for | |
2305 | failure. */ | |
c3f6f71d | 2306 | |
d3581e61 | 2307 | static int |
fba45db2 | 2308 | proc_set_fpregs (procinfo *pi) |
c906108c | 2309 | { |
c3f6f71d JM |
2310 | gdb_fpregset_t *fpregs; |
2311 | int win; | |
2312 | ||
772cf8be MK |
2313 | fpregs = proc_get_fpregs (pi); |
2314 | if (fpregs == NULL) | |
2315 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2316 | |
772cf8be | 2317 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2318 | { |
c3f6f71d | 2319 | return 0; |
c906108c | 2320 | } |
c3f6f71d | 2321 | else |
c906108c | 2322 | { |
c3f6f71d JM |
2323 | #ifdef NEW_PROC_API |
2324 | struct { | |
37de36c6 | 2325 | procfs_ctl_t cmd; |
c3f6f71d JM |
2326 | /* Use char array to avoid alignment issues. */ |
2327 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2328 | } arg; | |
2329 | ||
772cf8be | 2330 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2331 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2332 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2333 | #else | |
772cf8be | 2334 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2335 | if (pi->tid == 0) |
2336 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2337 | else | |
2338 | { | |
2339 | struct { | |
2340 | long pr_count; | |
2341 | tid_t pr_error_thread; | |
2342 | tfpregset_t thread_1; | |
2343 | } thread_fpregs; | |
2344 | ||
2345 | thread_fpregs.pr_count = 1; | |
2346 | thread_fpregs.thread_1.tid = pi->tid; | |
2347 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2348 | sizeof (*fpregs)); | |
2349 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2350 | } | |
772cf8be | 2351 | # else |
c3f6f71d | 2352 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2353 | # endif |
2354 | #endif /* NEW_PROC_API */ | |
c906108c | 2355 | } |
c3f6f71d | 2356 | |
772cf8be | 2357 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2358 | pi->fpregs_valid = 0; |
2359 | return win; | |
c906108c SS |
2360 | } |
2361 | ||
77382aee PA |
2362 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2363 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2364 | |
d3581e61 | 2365 | static int |
fba45db2 | 2366 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2367 | { |
2368 | int win; | |
c906108c | 2369 | |
77382aee PA |
2370 | /* We might conceivably apply this operation to an LWP, and the |
2371 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2372 | |
c3f6f71d JM |
2373 | if (pi->ctl_fd == 0 && |
2374 | open_procinfo_files (pi, FD_CTL) == 0) | |
2375 | { | |
2376 | return 0; | |
2377 | } | |
2378 | else | |
2379 | { | |
2380 | #ifdef NEW_PROC_API | |
37de36c6 | 2381 | procfs_ctl_t cmd[2]; |
c906108c | 2382 | |
c3f6f71d JM |
2383 | cmd[0] = PCKILL; |
2384 | cmd[1] = signo; | |
2385 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2386 | #else /* ioctl method */ | |
2387 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2388 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2389 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2390 | #endif | |
2391 | } | |
c906108c | 2392 | |
c3f6f71d JM |
2393 | return win; |
2394 | } | |
c906108c | 2395 | |
77382aee PA |
2396 | /* Find the pid of the process that started this one. Returns the |
2397 | parent process pid, or zero. */ | |
c906108c | 2398 | |
d3581e61 | 2399 | static int |
fba45db2 | 2400 | proc_parent_pid (procinfo *pi) |
c906108c | 2401 | { |
77382aee PA |
2402 | /* We should never have to apply this operation to any procinfo |
2403 | except the one for the main process. If that ever changes for | |
2404 | any reason, then take out the following clause and replace it | |
2405 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2406 | |
c3f6f71d JM |
2407 | if (pi->tid != 0) |
2408 | pi = find_procinfo_or_die (pi->pid, 0); | |
2409 | ||
2410 | if (!pi->status_valid) | |
2411 | if (!proc_get_status (pi)) | |
2412 | return 0; | |
c5aa993b | 2413 | |
c3f6f71d JM |
2414 | return pi->prstatus.pr_ppid; |
2415 | } | |
2416 | ||
9a043c1d AC |
2417 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2418 | (a.k.a void pointer)! */ | |
2419 | ||
1ca8fce0 | 2420 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
05b4bd79 | 2421 | && !(defined (PIOCOPENLWP)) |
9a043c1d AC |
2422 | static void * |
2423 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2424 | { | |
f5656ead | 2425 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
2426 | void *ptr; |
2427 | ||
4e906f53 | 2428 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 2429 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 2430 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
2431 | return ptr; |
2432 | } | |
1ca8fce0 | 2433 | #endif |
9a043c1d | 2434 | |
a0911fd0 | 2435 | static int |
fba45db2 | 2436 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2437 | { |
d1a7880c PA |
2438 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2439 | /* If neither or these is defined, we can't support watchpoints. | |
2440 | This just avoids possibly failing to compile the below on such | |
2441 | systems. */ | |
c3f6f71d JM |
2442 | return 0; |
2443 | #else | |
0df8b418 | 2444 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
05b4bd79 | 2445 | #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */ |
c3f6f71d JM |
2446 | return 0; |
2447 | #else | |
2448 | struct { | |
37de36c6 | 2449 | procfs_ctl_t cmd; |
c3f6f71d JM |
2450 | char watch[sizeof (prwatch_t)]; |
2451 | } arg; | |
73930d4d | 2452 | prwatch_t pwatch; |
c3f6f71d | 2453 | |
9a043c1d AC |
2454 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2455 | convert a target address into something that can be stored in a | |
2456 | native data structure. */ | |
831e682e | 2457 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2458 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2459 | #else |
73930d4d | 2460 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2461 | #endif |
73930d4d KH |
2462 | pwatch.pr_size = len; |
2463 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2464 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2465 | arg.cmd = PCWATCH; | |
73930d4d | 2466 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2467 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2468 | #else | |
2469 | #if defined (PIOCSWATCH) | |
73930d4d | 2470 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2471 | #else |
2472 | return 0; /* Fail */ | |
2473 | #endif | |
2474 | #endif | |
2475 | #endif | |
2476 | #endif | |
c906108c SS |
2477 | } |
2478 | ||
965b60ee | 2479 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2480 | |
c3f6f71d | 2481 | #include <sys/sysi86.h> |
c906108c | 2482 | |
77382aee PA |
2483 | /* The KEY is actually the value of the lower 16 bits of the GS |
2484 | register for the LWP that we're interested in. Returns the | |
2485 | matching ssh struct (LDT entry). */ | |
c906108c | 2486 | |
337c776f | 2487 | static struct ssd * |
fba45db2 | 2488 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2489 | { |
c3f6f71d JM |
2490 | static struct ssd *ldt_entry = NULL; |
2491 | #ifdef NEW_PROC_API | |
2492 | char pathname[MAX_PROC_NAME_SIZE]; | |
2493 | struct cleanup *old_chain = NULL; | |
2494 | int fd; | |
2495 | ||
2496 | /* Allocate space for one LDT entry. | |
2497 | This alloc must persist, because we return a pointer to it. */ | |
2498 | if (ldt_entry == NULL) | |
2499 | ldt_entry = (struct ssd *) xmalloc (sizeof (struct ssd)); | |
2500 | ||
2501 | /* Open the file descriptor for the LDT table. */ | |
2502 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2503 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2504 | { |
c3f6f71d JM |
2505 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2506 | return NULL; | |
c906108c | 2507 | } |
0df8b418 | 2508 | /* Make sure it gets closed again! */ |
004527cb | 2509 | old_chain = make_cleanup_close (fd); |
c906108c | 2510 | |
c3f6f71d JM |
2511 | /* Now 'read' thru the table, find a match and return it. */ |
2512 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2513 | { |
c3f6f71d JM |
2514 | if (ldt_entry->sel == 0 && |
2515 | ldt_entry->bo == 0 && | |
2516 | ldt_entry->acc1 == 0 && | |
2517 | ldt_entry->acc2 == 0) | |
2518 | break; /* end of table */ | |
0df8b418 | 2519 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2520 | if (ldt_entry->sel == key) |
2521 | return ldt_entry; | |
c906108c | 2522 | } |
0df8b418 | 2523 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2524 | return NULL; |
2525 | #else | |
2526 | int nldt, i; | |
2527 | static int nalloc = 0; | |
c906108c | 2528 | |
c3f6f71d JM |
2529 | /* Get the number of LDT entries. */ |
2530 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2531 | { |
c3f6f71d JM |
2532 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2533 | return NULL; | |
c906108c SS |
2534 | } |
2535 | ||
0df8b418 MS |
2536 | /* Allocate space for the number of LDT entries. */ |
2537 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2538 | if (nldt > nalloc) |
c906108c | 2539 | { |
19958708 | 2540 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2541 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2542 | nalloc = nldt; | |
2543 | } | |
19958708 | 2544 | |
c3f6f71d JM |
2545 | /* Read the whole table in one gulp. */ |
2546 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2547 | { | |
2548 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2549 | return NULL; | |
c906108c SS |
2550 | } |
2551 | ||
0df8b418 | 2552 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2553 | for (i = 0; i < nldt; i++) |
2554 | if (ldt_entry[i].sel == key) | |
2555 | return &ldt_entry[i]; | |
c906108c | 2556 | |
0df8b418 | 2557 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2558 | return NULL; |
2559 | #endif | |
2560 | } | |
c906108c | 2561 | |
77382aee | 2562 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2563 | |
2564 | struct ssd * | |
2565 | procfs_find_LDT_entry (ptid_t ptid) | |
2566 | { | |
2567 | gdb_gregset_t *gregs; | |
2568 | int key; | |
2569 | procinfo *pi; | |
2570 | ||
0df8b418 | 2571 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 2572 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 2573 | { |
0b62613e | 2574 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 2575 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2576 | return NULL; |
2577 | } | |
0df8b418 | 2578 | /* get its general registers. */ |
965b60ee JB |
2579 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2580 | { | |
0b62613e | 2581 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 2582 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2583 | return NULL; |
2584 | } | |
0df8b418 | 2585 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2586 | key = (*gregs)[GS] & 0xffff; |
2587 | ||
0df8b418 | 2588 | /* Find the matching entry and return it. */ |
965b60ee JB |
2589 | return proc_get_LDT_entry (pi, key); |
2590 | } | |
2591 | ||
2592 | #endif | |
c906108c | 2593 | |
c3f6f71d | 2594 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2595 | |
c3f6f71d | 2596 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2597 | |
c3f6f71d JM |
2598 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2599 | since there is a different way to do threads on every OS. */ | |
c906108c | 2600 | |
77382aee | 2601 | /* Returns the number of threads for the process. */ |
c906108c | 2602 | |
c3f6f71d | 2603 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2604 | /* OSF version */ |
d3581e61 | 2605 | static int |
fba45db2 | 2606 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2607 | { |
2608 | int nthreads = 0; | |
c906108c | 2609 | |
c3f6f71d JM |
2610 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2611 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2612 | |
c3f6f71d | 2613 | return nthreads; |
c906108c SS |
2614 | } |
2615 | ||
c3f6f71d JM |
2616 | #else |
2617 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2618 | /* Solaris version */ |
d3581e61 | 2619 | static int |
fba45db2 | 2620 | proc_get_nthreads (procinfo *pi) |
c906108c | 2621 | { |
c3f6f71d JM |
2622 | if (!pi->status_valid) |
2623 | if (!proc_get_status (pi)) | |
2624 | return 0; | |
c5aa993b | 2625 | |
77382aee PA |
2626 | /* NEW_PROC_API: only works for the process procinfo, because the |
2627 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2628 | #ifdef NEW_PROC_API |
0df8b418 | 2629 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2630 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2631 | #endif |
c3f6f71d | 2632 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2633 | } |
2634 | ||
c3f6f71d | 2635 | #else |
77382aee | 2636 | /* Default version */ |
d3581e61 | 2637 | static int |
fba45db2 | 2638 | proc_get_nthreads (procinfo *pi) |
c906108c | 2639 | { |
c3f6f71d JM |
2640 | return 0; |
2641 | } | |
2642 | #endif | |
2643 | #endif | |
2644 | ||
77382aee PA |
2645 | /* LWP version. |
2646 | ||
2647 | Return the ID of the thread that had an event of interest. | |
2648 | (ie. the one that hit a breakpoint or other traced event). All | |
2649 | other things being equal, this should be the ID of a thread that is | |
2650 | currently executing. */ | |
c3f6f71d JM |
2651 | |
2652 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2653 | /* Solaris version */ |
d3581e61 | 2654 | static int |
fba45db2 | 2655 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2656 | { |
77382aee PA |
2657 | /* Note: this should be applied to the root procinfo for the |
2658 | process, not to the procinfo for an LWP. If applied to the | |
2659 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2660 | that case, find the parent process procinfo. */ | |
19958708 | 2661 | |
c3f6f71d JM |
2662 | if (pi->tid != 0) |
2663 | pi = find_procinfo_or_die (pi->pid, 0); | |
2664 | ||
2665 | if (!pi->status_valid) | |
2666 | if (!proc_get_status (pi)) | |
2667 | return 0; | |
2668 | ||
2669 | #ifdef NEW_PROC_API | |
2670 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2671 | #else |
c3f6f71d | 2672 | return pi->prstatus.pr_who; |
c906108c | 2673 | #endif |
c3f6f71d | 2674 | } |
c906108c | 2675 | |
c3f6f71d JM |
2676 | #else |
2677 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2678 | /* OSF version */ |
d3581e61 | 2679 | static int |
fba45db2 | 2680 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2681 | { |
0df8b418 | 2682 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2683 | return pi->prstatus.pr_tid; |
2684 | #else | |
2685 | return 0; | |
2686 | #endif | |
c906108c SS |
2687 | } |
2688 | ||
c3f6f71d | 2689 | #else |
77382aee | 2690 | /* Default version */ |
d3581e61 | 2691 | static int |
fba45db2 | 2692 | proc_get_current_thread (procinfo *pi) |
c906108c | 2693 | { |
c3f6f71d JM |
2694 | return 0; |
2695 | } | |
2696 | ||
2697 | #endif | |
2698 | #endif | |
c906108c | 2699 | |
77382aee PA |
2700 | /* Discover the IDs of all the threads within the process, and create |
2701 | a procinfo for each of them (chained to the parent). This | |
2702 | unfortunately requires a different method on every OS. Returns | |
2703 | non-zero for success, zero for failure. */ | |
c906108c | 2704 | |
a0911fd0 | 2705 | static int |
fba45db2 | 2706 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2707 | { |
2708 | if (thread && parent) /* sanity */ | |
c906108c | 2709 | { |
c3f6f71d JM |
2710 | thread->status_valid = 0; |
2711 | if (!proc_get_status (thread)) | |
2712 | destroy_one_procinfo (&parent->thread_list, thread); | |
2713 | } | |
2714 | return 0; /* keep iterating */ | |
2715 | } | |
c5aa993b | 2716 | |
c3f6f71d | 2717 | #if defined (PIOCLSTATUS) |
77382aee | 2718 | /* Solaris 2.5 (ioctl) version */ |
d3581e61 | 2719 | static int |
fba45db2 | 2720 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2721 | { |
2722 | gdb_prstatus_t *prstatus; | |
2723 | struct cleanup *old_chain = NULL; | |
2724 | procinfo *thread; | |
2725 | int nlwp, i; | |
2726 | ||
77382aee PA |
2727 | /* We should never have to apply this operation to any procinfo |
2728 | except the one for the main process. If that ever changes for | |
2729 | any reason, then take out the following clause and replace it | |
2730 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2731 | |
c3f6f71d JM |
2732 | if (pi->tid != 0) |
2733 | pi = find_procinfo_or_die (pi->pid, 0); | |
2734 | ||
2735 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2736 | ||
2737 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2738 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2739 | ||
3c37485b | 2740 | prstatus = xmalloc (sizeof (gdb_prstatus_t) * (nlwp + 1)); |
c3f6f71d | 2741 | |
b8c9b27d | 2742 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2743 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2744 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2745 | ||
77382aee | 2746 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2747 | for (i = 1; i < nlwp + 1; i++) |
2748 | { | |
2749 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2750 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2751 | |
c3f6f71d JM |
2752 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2753 | thread->status_valid = 1; | |
2754 | } | |
2755 | pi->threads_valid = 1; | |
2756 | do_cleanups (old_chain); | |
2757 | return 1; | |
2758 | } | |
2759 | #else | |
2760 | #ifdef NEW_PROC_API | |
05b4bd79 | 2761 | /* Solaris 6 (and later) version. */ |
004527cb AC |
2762 | static void |
2763 | do_closedir_cleanup (void *dir) | |
2764 | { | |
2765 | closedir (dir); | |
2766 | } | |
2767 | ||
d3581e61 | 2768 | static int |
fba45db2 | 2769 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2770 | { |
2771 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2772 | struct dirent *direntry; | |
2773 | struct cleanup *old_chain = NULL; | |
2774 | procinfo *thread; | |
2775 | DIR *dirp; | |
2776 | int lwpid; | |
2777 | ||
77382aee PA |
2778 | /* We should never have to apply this operation to any procinfo |
2779 | except the one for the main process. If that ever changes for | |
2780 | any reason, then take out the following clause and replace it | |
2781 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2782 | |
c3f6f71d JM |
2783 | if (pi->tid != 0) |
2784 | pi = find_procinfo_or_die (pi->pid, 0); | |
2785 | ||
2786 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2787 | ||
05b4bd79 PA |
2788 | /* Note: this brute-force method was originally devised for Unixware |
2789 | (support removed since), and will also work on Solaris 2.6 and | |
2790 | 2.7. The original comment mentioned the existence of a much | |
2791 | simpler and more elegant way to do this on Solaris, but didn't | |
2792 | point out what that was. */ | |
c3f6f71d JM |
2793 | |
2794 | strcpy (pathname, pi->pathname); | |
2795 | strcat (pathname, "/lwp"); | |
2796 | if ((dirp = opendir (pathname)) == NULL) | |
2797 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2798 | ||
004527cb | 2799 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2800 | while ((direntry = readdir (dirp)) != NULL) |
2801 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2802 | { | |
2803 | lwpid = atoi (&direntry->d_name[0]); | |
2804 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2805 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2806 | } | |
2807 | pi->threads_valid = 1; | |
2808 | do_cleanups (old_chain); | |
2809 | return 1; | |
2810 | } | |
2811 | #else | |
2812 | #ifdef PIOCTLIST | |
77382aee | 2813 | /* OSF version */ |
d3581e61 | 2814 | static int |
fba45db2 | 2815 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2816 | { |
2817 | int nthreads, i; | |
2818 | tid_t *threads; | |
2819 | ||
77382aee PA |
2820 | /* We should never have to apply this operation to any procinfo |
2821 | except the one for the main process. If that ever changes for | |
2822 | any reason, then take out the following clause and replace it | |
2823 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2824 | |
c3f6f71d JM |
2825 | if (pi->tid != 0) |
2826 | pi = find_procinfo_or_die (pi->pid, 0); | |
2827 | ||
2828 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2829 | ||
2830 | nthreads = proc_get_nthreads (pi); | |
2831 | if (nthreads < 2) | |
0df8b418 | 2832 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 2833 | |
3c37485b | 2834 | threads = xmalloc (nthreads * sizeof (tid_t)); |
19958708 | 2835 | |
c3f6f71d JM |
2836 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
2837 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2838 | ||
2839 | for (i = 0; i < nthreads; i++) | |
2840 | { | |
2841 | if (!find_procinfo (pi->pid, threads[i])) | |
2842 | if (!create_procinfo (pi->pid, threads[i])) | |
2843 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2844 | } |
c3f6f71d JM |
2845 | pi->threads_valid = 1; |
2846 | return 1; | |
c906108c | 2847 | } |
c3f6f71d | 2848 | #else |
77382aee | 2849 | /* Default version */ |
d3581e61 | 2850 | static int |
fba45db2 | 2851 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2852 | { |
2853 | return 0; | |
2854 | } | |
2855 | #endif /* OSF PIOCTLIST */ | |
2856 | #endif /* NEW_PROC_API */ | |
2857 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 2858 | |
77382aee PA |
2859 | /* Given a pointer to a function, call that function once for each lwp |
2860 | in the procinfo list, until the function returns non-zero, in which | |
2861 | event return the value returned by the function. | |
2862 | ||
2863 | Note: this function does NOT call update_threads. If you want to | |
2864 | discover new threads first, you must call that function explicitly. | |
2865 | This function just makes a quick pass over the currently-known | |
2866 | procinfos. | |
2867 | ||
2868 | PI is the parent process procinfo. FUNC is the per-thread | |
2869 | function. PTR is an opaque parameter for function. Returns the | |
2870 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 2871 | |
d3581e61 | 2872 | static int |
d0849a9a KB |
2873 | proc_iterate_over_threads (procinfo *pi, |
2874 | int (*func) (procinfo *, procinfo *, void *), | |
2875 | void *ptr) | |
c906108c | 2876 | { |
c3f6f71d JM |
2877 | procinfo *thread, *next; |
2878 | int retval = 0; | |
c906108c | 2879 | |
77382aee PA |
2880 | /* We should never have to apply this operation to any procinfo |
2881 | except the one for the main process. If that ever changes for | |
2882 | any reason, then take out the following clause and replace it | |
2883 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2884 | |
c3f6f71d JM |
2885 | if (pi->tid != 0) |
2886 | pi = find_procinfo_or_die (pi->pid, 0); | |
2887 | ||
2888 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 2889 | { |
0df8b418 | 2890 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
2891 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
2892 | break; | |
c906108c | 2893 | } |
c3f6f71d JM |
2894 | |
2895 | return retval; | |
c906108c SS |
2896 | } |
2897 | ||
c3f6f71d JM |
2898 | /* =================== END, Thread "MODULE" =================== */ |
2899 | ||
2900 | /* =================== END, /proc "MODULE" =================== */ | |
2901 | ||
2902 | /* =================== GDB "MODULE" =================== */ | |
2903 | ||
77382aee PA |
2904 | /* Here are all of the gdb target vector functions and their |
2905 | friends. */ | |
c3f6f71d | 2906 | |
39f77062 | 2907 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 2908 | static void do_detach (int signo); |
9185ddce | 2909 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 2910 | int entry_or_exit, int mode, int from_tty); |
9185ddce JB |
2911 | |
2912 | /* On mips-irix, we need to insert a breakpoint at __dbx_link during | |
2913 | the startup phase. The following two variables are used to record | |
2914 | the address of the breakpoint, and the code that was replaced by | |
2915 | a breakpoint. */ | |
2916 | static int dbx_link_bpt_addr = 0; | |
8181d85f | 2917 | static void *dbx_link_bpt; |
c3f6f71d | 2918 | |
77382aee PA |
2919 | /* Sets up the inferior to be debugged. Registers to trace signals, |
2920 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
2921 | may want to customize that. Returns zero for success (note! | |
2922 | unlike most functions in this module); on failure, returns the LINE | |
2923 | NUMBER where it failed! */ | |
c3f6f71d JM |
2924 | |
2925 | static int | |
fba45db2 | 2926 | procfs_debug_inferior (procinfo *pi) |
c906108c | 2927 | { |
c3f6f71d | 2928 | fltset_t traced_faults; |
37de36c6 KB |
2929 | gdb_sigset_t traced_signals; |
2930 | sysset_t *traced_syscall_entries; | |
2931 | sysset_t *traced_syscall_exits; | |
2932 | int status; | |
c906108c | 2933 | |
c3f6f71d JM |
2934 | #ifdef PROCFS_DONT_TRACE_FAULTS |
2935 | /* On some systems (OSF), we don't trace hardware faults. | |
2936 | Apparently it's enough that we catch them as signals. | |
0df8b418 MS |
2937 | Wonder why we don't just do that in general? */ |
2938 | premptyset (&traced_faults); /* don't trace faults. */ | |
c3f6f71d | 2939 | #else |
0df8b418 MS |
2940 | /* Register to trace hardware faults in the child. */ |
2941 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 2942 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
2943 | #endif |
2944 | if (!proc_set_traced_faults (pi, &traced_faults)) | |
2945 | return __LINE__; | |
c906108c | 2946 | |
2455069d UW |
2947 | /* Initially, register to trace all signals in the child. */ |
2948 | prfillset (&traced_signals); | |
2949 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
2950 | return __LINE__; |
2951 | ||
37de36c6 | 2952 | |
c3f6f71d | 2953 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
2954 | traced_syscall_entries = sysset_t_alloc (pi); |
2955 | gdb_premptysysset (traced_syscall_entries); | |
2956 | #ifdef SYS_exit | |
2957 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
2958 | #endif | |
c3f6f71d | 2959 | #ifdef SYS_lwpexit |
0df8b418 | 2960 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
2961 | #endif |
2962 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
2963 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
2964 | #endif | |
2965 | #ifdef DYNAMIC_SYSCALLS | |
2966 | { | |
2967 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 2968 | |
37de36c6 KB |
2969 | if (callnum >= 0) |
2970 | gdb_praddsysset (traced_syscall_entries, callnum); | |
2971 | } | |
c906108c SS |
2972 | #endif |
2973 | ||
37de36c6 KB |
2974 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
2975 | xfree (traced_syscall_entries); | |
2976 | if (!status) | |
c3f6f71d JM |
2977 | return __LINE__; |
2978 | ||
2979 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
2980 | /* OSF method for tracing exec syscalls. Quoting: | |
2981 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
2982 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 2983 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
2984 | { |
2985 | int prfs_flags; | |
2986 | ||
2987 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
2988 | return __LINE__; | |
2989 | ||
2990 | prfs_flags |= PRFS_STOPEXEC; | |
2991 | ||
2992 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
2993 | return __LINE__; | |
2994 | } | |
2995 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 2996 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
2997 | /* GW: Rationale... |
2998 | Not all systems with /proc have all the exec* syscalls with the same | |
2999 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 3000 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 3001 | |
37de36c6 KB |
3002 | traced_syscall_exits = sysset_t_alloc (pi); |
3003 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 3004 | #ifdef SYS_exec |
37de36c6 | 3005 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
3006 | #endif |
3007 | #ifdef SYS_execve | |
37de36c6 | 3008 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
3009 | #endif |
3010 | #ifdef SYS_execv | |
37de36c6 | 3011 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 3012 | #endif |
c5aa993b | 3013 | |
c3f6f71d | 3014 | #ifdef SYS_lwpcreate |
37de36c6 KB |
3015 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
3016 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 3017 | #endif |
c5aa993b | 3018 | |
0df8b418 | 3019 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3020 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3021 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3022 | #endif |
c5aa993b | 3023 | |
37de36c6 KB |
3024 | #ifdef DYNAMIC_SYSCALLS |
3025 | { | |
3026 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3027 | |
37de36c6 KB |
3028 | if (callnum >= 0) |
3029 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3030 | callnum = find_syscall (pi, "ra_execve"); | |
3031 | if (callnum >= 0) | |
3032 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3033 | } | |
3034 | #endif | |
c906108c | 3035 | |
37de36c6 KB |
3036 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3037 | xfree (traced_syscall_exits); | |
3038 | if (!status) | |
c3f6f71d JM |
3039 | return __LINE__; |
3040 | ||
3041 | #endif /* PRFS_STOPEXEC */ | |
3042 | return 0; | |
c906108c SS |
3043 | } |
3044 | ||
19958708 | 3045 | static void |
136d6dae | 3046 | procfs_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 3047 | { |
c3f6f71d JM |
3048 | char *exec_file; |
3049 | int pid; | |
3050 | ||
74164c56 | 3051 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3052 | |
c3f6f71d | 3053 | if (pid == getpid ()) |
8a3fe4f8 | 3054 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3055 | |
c3f6f71d | 3056 | if (from_tty) |
c906108c | 3057 | { |
c3f6f71d JM |
3058 | exec_file = get_exec_file (0); |
3059 | ||
3060 | if (exec_file) | |
a3f17187 | 3061 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3062 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3063 | else |
a3f17187 | 3064 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3065 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3066 | |
3067 | fflush (stdout); | |
c906108c | 3068 | } |
39f77062 | 3069 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
28439f5e | 3070 | push_target (ops); |
c3f6f71d JM |
3071 | } |
3072 | ||
19958708 | 3073 | static void |
136d6dae | 3074 | procfs_detach (struct target_ops *ops, char *args, int from_tty) |
c3f6f71d | 3075 | { |
cc377e6b | 3076 | int sig = 0; |
dfd4cc63 | 3077 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b MK |
3078 | |
3079 | if (args) | |
3080 | sig = atoi (args); | |
c3f6f71d JM |
3081 | |
3082 | if (from_tty) | |
c906108c | 3083 | { |
cc377e6b MK |
3084 | char *exec_file; |
3085 | ||
c3f6f71d | 3086 | exec_file = get_exec_file (0); |
cc377e6b | 3087 | if (exec_file == NULL) |
c3f6f71d | 3088 | exec_file = ""; |
cc377e6b | 3089 | |
a3f17187 | 3090 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3091 | target_pid_to_str (pid_to_ptid (pid))); |
3092 | gdb_flush (gdb_stdout); | |
c906108c | 3093 | } |
19958708 | 3094 | |
cc377e6b MK |
3095 | do_detach (sig); |
3096 | ||
39f77062 | 3097 | inferior_ptid = null_ptid; |
7f9f62ba | 3098 | detach_inferior (pid); |
28439f5e | 3099 | unpush_target (ops); |
c906108c SS |
3100 | } |
3101 | ||
39f77062 KB |
3102 | static ptid_t |
3103 | do_attach (ptid_t ptid) | |
c906108c | 3104 | { |
c3f6f71d | 3105 | procinfo *pi; |
181e7f93 | 3106 | struct inferior *inf; |
c3f6f71d | 3107 | int fail; |
2689673f | 3108 | int lwpid; |
c3f6f71d | 3109 | |
dfd4cc63 | 3110 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 3111 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3112 | |
3113 | if (!open_procinfo_files (pi, FD_CTL)) | |
3114 | { | |
3115 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3116 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 3117 | ptid_get_pid (ptid)); |
c3f6f71d JM |
3118 | dead_procinfo (pi, errmsg, NOKILL); |
3119 | } | |
c906108c | 3120 | |
c3f6f71d JM |
3121 | /* Stop the process (if it isn't already stopped). */ |
3122 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3123 | { |
c3f6f71d JM |
3124 | pi->was_stopped = 1; |
3125 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3126 | } |
3127 | else | |
3128 | { | |
c3f6f71d JM |
3129 | pi->was_stopped = 0; |
3130 | /* Set the process to run again when we close it. */ | |
3131 | if (!proc_set_run_on_last_close (pi)) | |
3132 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3133 | ||
0df8b418 | 3134 | /* Now stop the process. */ |
c3f6f71d JM |
3135 | if (!proc_stop_process (pi)) |
3136 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3137 | pi->ignore_next_sigstop = 1; | |
c906108c | 3138 | } |
c3f6f71d JM |
3139 | /* Save some of the /proc state to be restored if we detach. */ |
3140 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3141 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3142 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3143 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3144 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3145 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3146 | NOKILL); | |
37de36c6 | 3147 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3148 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3149 | NOKILL); |
3150 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3151 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3152 | ||
3153 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3154 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3155 | ||
6c95b8df PA |
3156 | inf = current_inferior (); |
3157 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3158 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3159 | inf->attach_flag = 1; |
2689673f PA |
3160 | |
3161 | /* Create a procinfo for the current lwp. */ | |
3162 | lwpid = proc_get_current_thread (pi); | |
3163 | create_procinfo (pi->pid, lwpid); | |
3164 | ||
3165 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 3166 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
3167 | add_thread (ptid); |
3168 | ||
3169 | return ptid; | |
c906108c SS |
3170 | } |
3171 | ||
3172 | static void | |
fba45db2 | 3173 | do_detach (int signo) |
c906108c | 3174 | { |
c3f6f71d | 3175 | procinfo *pi; |
c906108c | 3176 | |
0df8b418 | 3177 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
3178 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
3179 | 0); /* FIXME: threads */ | |
c3f6f71d JM |
3180 | if (signo) |
3181 | if (!proc_set_current_signal (pi, signo)) | |
3182 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3183 | |
c3f6f71d JM |
3184 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3185 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3186 | |
c3f6f71d JM |
3187 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3188 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3189 | ||
37de36c6 | 3190 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3191 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3192 | ||
37de36c6 | 3193 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3194 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3195 | ||
3196 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3197 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3198 | ||
3199 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3200 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3201 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3202 | { |
3203 | /* Clear any pending signal. */ | |
3204 | if (!proc_clear_current_fault (pi)) | |
3205 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3206 | ||
1a303dec MS |
3207 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3208 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3209 | ||
c3f6f71d JM |
3210 | if (!proc_set_run_on_last_close (pi)) |
3211 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3212 | } | |
3213 | ||
c3f6f71d | 3214 | destroy_procinfo (pi); |
c906108c SS |
3215 | } |
3216 | ||
772cf8be MK |
3217 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3218 | for all registers. | |
3219 | ||
3220 | ??? Is the following note still relevant? We can't get individual | |
3221 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3222 | don't bother with caching at all in that case. | |
3223 | ||
3224 | NOTE: Since the /proc interface cannot give us individual | |
3225 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3226 | This results in the possibility that we will do unnecessarily many | |
3227 | fetches, since we may be called repeatedly for individual | |
3228 | registers. So we cache the results, and mark the cache invalid | |
3229 | when the process is resumed. */ | |
c3f6f71d | 3230 | |
c906108c | 3231 | static void |
28439f5e PA |
3232 | procfs_fetch_registers (struct target_ops *ops, |
3233 | struct regcache *regcache, int regnum) | |
c906108c | 3234 | { |
772cf8be MK |
3235 | gdb_gregset_t *gregs; |
3236 | procinfo *pi; | |
dfd4cc63 LM |
3237 | int pid = ptid_get_pid (inferior_ptid); |
3238 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3239 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3240 | |
2689673f | 3241 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3242 | |
3243 | if (pi == NULL) | |
8a3fe4f8 | 3244 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3245 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3246 | |
772cf8be MK |
3247 | gregs = proc_get_gregs (pi); |
3248 | if (gregs == NULL) | |
c3f6f71d JM |
3249 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3250 | ||
56be3814 | 3251 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3252 | |
40a6adc1 | 3253 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3254 | { |
772cf8be MK |
3255 | gdb_fpregset_t *fpregs; |
3256 | ||
40a6adc1 MD |
3257 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3258 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3259 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3260 | return; /* Not a floating point register. */ |
c5aa993b | 3261 | |
772cf8be MK |
3262 | fpregs = proc_get_fpregs (pi); |
3263 | if (fpregs == NULL) | |
60054393 | 3264 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3265 | |
56be3814 | 3266 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3267 | } |
c906108c SS |
3268 | } |
3269 | ||
772cf8be MK |
3270 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3271 | this for all registers. | |
3272 | ||
3273 | NOTE: Since the /proc interface will not read individual registers, | |
3274 | we will cache these requests until the process is resumed, and only | |
3275 | then write them back to the inferior process. | |
77382aee | 3276 | |
772cf8be MK |
3277 | FIXME: is that a really bad idea? Have to think about cases where |
3278 | writing one register might affect the value of others, etc. */ | |
c906108c | 3279 | |
c3f6f71d | 3280 | static void |
28439f5e PA |
3281 | procfs_store_registers (struct target_ops *ops, |
3282 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3283 | { |
772cf8be MK |
3284 | gdb_gregset_t *gregs; |
3285 | procinfo *pi; | |
dfd4cc63 LM |
3286 | int pid = ptid_get_pid (inferior_ptid); |
3287 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3288 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3289 | |
2689673f | 3290 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3291 | |
3292 | if (pi == NULL) | |
8a3fe4f8 | 3293 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3294 | target_pid_to_str (inferior_ptid)); |
c906108c | 3295 | |
772cf8be MK |
3296 | gregs = proc_get_gregs (pi); |
3297 | if (gregs == NULL) | |
c3f6f71d | 3298 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3299 | |
56be3814 | 3300 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3301 | if (!proc_set_gregs (pi)) |
3302 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3303 | |
40a6adc1 | 3304 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3305 | { |
772cf8be MK |
3306 | gdb_fpregset_t *fpregs; |
3307 | ||
40a6adc1 MD |
3308 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3309 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3310 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3311 | return; /* Not a floating point register. */ |
60054393 | 3312 | |
772cf8be MK |
3313 | fpregs = proc_get_fpregs (pi); |
3314 | if (fpregs == NULL) | |
60054393 MS |
3315 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3316 | ||
56be3814 | 3317 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3318 | if (!proc_set_fpregs (pi)) |
3319 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3320 | } | |
c3f6f71d | 3321 | } |
c906108c | 3322 | |
37de36c6 KB |
3323 | static int |
3324 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3325 | { | |
37de36c6 KB |
3326 | #ifdef SYS_lwp_exit |
3327 | if (scall == SYS_lwp_exit) | |
3328 | return 1; | |
3329 | #endif | |
3330 | #ifdef SYS_lwpexit | |
3331 | if (scall == SYS_lwpexit) | |
3332 | return 1; | |
3333 | #endif | |
3334 | return 0; | |
3335 | } | |
3336 | ||
3337 | static int | |
3338 | syscall_is_exit (procinfo *pi, int scall) | |
3339 | { | |
3340 | #ifdef SYS_exit | |
3341 | if (scall == SYS_exit) | |
3342 | return 1; | |
3343 | #endif | |
3344 | #ifdef DYNAMIC_SYSCALLS | |
3345 | if (find_syscall (pi, "_exit") == scall) | |
3346 | return 1; | |
3347 | #endif | |
3348 | return 0; | |
3349 | } | |
3350 | ||
3351 | static int | |
3352 | syscall_is_exec (procinfo *pi, int scall) | |
3353 | { | |
3354 | #ifdef SYS_exec | |
3355 | if (scall == SYS_exec) | |
3356 | return 1; | |
3357 | #endif | |
3358 | #ifdef SYS_execv | |
3359 | if (scall == SYS_execv) | |
3360 | return 1; | |
3361 | #endif | |
3362 | #ifdef SYS_execve | |
3363 | if (scall == SYS_execve) | |
3364 | return 1; | |
3365 | #endif | |
3366 | #ifdef DYNAMIC_SYSCALLS | |
3367 | if (find_syscall (pi, "_execve")) | |
3368 | return 1; | |
3369 | if (find_syscall (pi, "ra_execve")) | |
3370 | return 1; | |
3371 | #endif | |
3372 | return 0; | |
3373 | } | |
3374 | ||
3375 | static int | |
3376 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3377 | { | |
3378 | #ifdef SYS_lwp_create | |
3379 | if (scall == SYS_lwp_create) | |
3380 | return 1; | |
3381 | #endif | |
3382 | #ifdef SYS_lwpcreate | |
3383 | if (scall == SYS_lwpcreate) | |
3384 | return 1; | |
3385 | #endif | |
3386 | return 0; | |
3387 | } | |
3388 | ||
7434dadd JB |
3389 | /* Remove the breakpoint that we inserted in __dbx_link(). |
3390 | Does nothing if the breakpoint hasn't been inserted or has already | |
3391 | been removed. */ | |
3392 | ||
3393 | static void | |
3394 | remove_dbx_link_breakpoint (void) | |
3395 | { | |
3396 | if (dbx_link_bpt_addr == 0) | |
3397 | return; | |
3398 | ||
f5656ead | 3399 | if (deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt) != 0) |
7434dadd JB |
3400 | warning (_("Unable to remove __dbx_link breakpoint.")); |
3401 | ||
3402 | dbx_link_bpt_addr = 0; | |
3403 | dbx_link_bpt = NULL; | |
3404 | } | |
3405 | ||
3406 | #ifdef SYS_syssgi | |
3407 | /* Return the address of the __dbx_link() function in the file | |
3408 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3409 | the symbol was not found. */ | |
3410 | ||
3411 | static CORE_ADDR | |
3412 | dbx_link_addr (bfd *abfd) | |
3413 | { | |
3414 | long storage_needed; | |
3415 | asymbol **symbol_table; | |
3416 | long number_of_symbols; | |
3417 | long i; | |
3418 | ||
3419 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3420 | if (storage_needed <= 0) | |
3421 | return 0; | |
3422 | ||
3423 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3424 | make_cleanup (xfree, symbol_table); | |
3425 | ||
3426 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3427 | ||
3428 | for (i = 0; i < number_of_symbols; i++) | |
3429 | { | |
3430 | asymbol *sym = symbol_table[i]; | |
3431 | ||
3432 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3433 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3434 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3435 | } |
3436 | ||
3437 | /* Symbol not found, return NULL. */ | |
3438 | return 0; | |
3439 | } | |
3440 | ||
3441 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3442 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3443 | and return nonzero. Return zero otherwise. */ |
3444 | ||
3445 | static int | |
3446 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3447 | { | |
3448 | bfd *abfd; | |
3449 | long storage_needed; | |
3450 | CORE_ADDR sym_addr; | |
3451 | ||
64c31149 | 3452 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
7434dadd JB |
3453 | if (abfd == NULL) |
3454 | { | |
3455 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3456 | return 0; | |
3457 | } | |
3458 | ||
3459 | if (!bfd_check_format (abfd, bfd_object)) | |
3460 | { | |
3461 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3462 | symbol in it. */ |
cbb099e8 | 3463 | gdb_bfd_unref (abfd); |
7434dadd JB |
3464 | return 0; |
3465 | } | |
3466 | ||
3467 | sym_addr = dbx_link_addr (abfd); | |
3468 | if (sym_addr != 0) | |
3469 | { | |
3470 | /* Insert the breakpoint. */ | |
3471 | dbx_link_bpt_addr = sym_addr; | |
f5656ead | 3472 | dbx_link_bpt = deprecated_insert_raw_breakpoint (target_gdbarch (), NULL, |
7434dadd JB |
3473 | sym_addr); |
3474 | if (dbx_link_bpt == NULL) | |
77382aee PA |
3475 | { |
3476 | warning (_("Failed to insert dbx_link breakpoint.")); | |
cbb099e8 | 3477 | gdb_bfd_unref (abfd); |
77382aee PA |
3478 | return 0; |
3479 | } | |
cbb099e8 | 3480 | gdb_bfd_unref (abfd); |
7434dadd JB |
3481 | return 1; |
3482 | } | |
3483 | ||
cbb099e8 | 3484 | gdb_bfd_unref (abfd); |
7434dadd JB |
3485 | return 0; |
3486 | } | |
3487 | ||
e294797a | 3488 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3489 | space in the process. The callback function receives an open file |
3490 | descriptor for the file corresponding to that mapped address space | |
3491 | (if there is one), and the base address of the mapped space. Quit | |
3492 | when the callback function returns a nonzero value, or at teh end | |
3493 | of the mappings. Returns the first non-zero return value of the | |
3494 | callback function, or zero. */ | |
e294797a JB |
3495 | |
3496 | static int | |
3497 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3498 | void *data) | |
3499 | { | |
3500 | procinfo *pi = data; | |
3501 | int fd; | |
3502 | ||
3503 | #ifdef NEW_PROC_API | |
3504 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3505 | ||
3506 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3507 | return -1; /* sanity */ | |
3508 | ||
3509 | if (map->pr_mapname[0] == 0) | |
3510 | { | |
3511 | fd = -1; /* no map file */ | |
3512 | } | |
3513 | else | |
3514 | { | |
3515 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3516 | /* Note: caller's responsibility to close this fd! */ | |
3517 | fd = open_with_retry (name, O_RDONLY); | |
3518 | /* Note: we don't test the above call for failure; | |
3519 | we just pass the FD on as given. Sometimes there is | |
3520 | no file, so the open may return failure, but that's | |
3521 | not a problem. */ | |
3522 | } | |
3523 | #else | |
3524 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3525 | /* Note: we don't test the above call for failure; | |
3526 | we just pass the FD on as given. Sometimes there is | |
3527 | no file, so the ioctl may return failure, but that's | |
3528 | not a problem. */ | |
3529 | #endif | |
3530 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3531 | } | |
3532 | ||
7434dadd JB |
3533 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3534 | insert a breakpoint at this location and return nonzero. Return | |
3535 | zero otherwise. */ | |
3536 | ||
3537 | static int | |
3538 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3539 | find_memory_region_ftype child_func, |
77382aee | 3540 | void *data) |
7434dadd JB |
3541 | { |
3542 | procinfo *pi = (procinfo *) data; | |
3543 | ||
3544 | /* We know the symbol we're looking for is in a text region, so | |
3545 | only look for it if the region is a text one. */ | |
3546 | if (map->pr_mflags & MA_EXEC) | |
3547 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3548 | ||
3549 | return 0; | |
3550 | } | |
3551 | ||
3552 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3553 | insert a breakpoint at its location, and return nonzero. Return zero | |
3554 | otherwise. */ | |
3555 | ||
3556 | static int | |
3557 | insert_dbx_link_breakpoint (procinfo *pi) | |
3558 | { | |
3559 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3560 | } | |
3561 | #endif | |
3562 | ||
77382aee PA |
3563 | /* Retrieve the next stop event from the child process. If child has |
3564 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3565 | (or possibly wait eventcodes) into gdb internal event codes. | |
3566 | Returns the id of process (and possibly thread) that incurred the | |
3567 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3568 | |
39f77062 | 3569 | static ptid_t |
117de6a9 | 3570 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3571 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3572 | { |
0df8b418 | 3573 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3574 | procinfo *pi; |
39f77062 KB |
3575 | int wstat; |
3576 | int temp_tid; | |
3577 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3578 | int why, what, flags; |
3579 | int retry = 0; | |
c906108c | 3580 | |
c3f6f71d | 3581 | wait_again: |
c906108c | 3582 | |
c3f6f71d JM |
3583 | retry++; |
3584 | wstat = 0; | |
39f77062 | 3585 | retval = pid_to_ptid (-1); |
c906108c | 3586 | |
0df8b418 | 3587 | /* Find procinfo for main process. */ |
dfd4cc63 | 3588 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 3589 | if (pi) |
c906108c | 3590 | { |
0df8b418 | 3591 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3592 | pi->status_valid = 0; |
3593 | pi->gregs_valid = 0; | |
3594 | pi->fpregs_valid = 0; | |
3595 | ||
0df8b418 | 3596 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3597 | flags = proc_flags (pi); |
3598 | why = proc_why (pi); | |
3599 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3600 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3601 | #endif |
3602 | /* If child is not stopped, wait for it to stop. */ | |
3603 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3604 | !proc_wait_for_stop (pi)) | |
c906108c | 3605 | { |
0df8b418 | 3606 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3607 | if (errno == ENOENT) |
c906108c | 3608 | { |
39f77062 KB |
3609 | int wait_retval; |
3610 | ||
0df8b418 MS |
3611 | /* /proc file not found; presumably child has terminated. */ |
3612 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3613 | |
dfd4cc63 LM |
3614 | /* Wrong child? */ |
3615 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
3616 | error (_("procfs: couldn't stop " |
3617 | "process %d: wait returned %d."), | |
dfd4cc63 | 3618 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 3619 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3620 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3621 | retval = pid_to_ptid (wait_retval); |
c906108c | 3622 | } |
d1566ff5 FN |
3623 | else if (errno == EINTR) |
3624 | goto wait_again; | |
c3f6f71d | 3625 | else |
c906108c | 3626 | { |
0df8b418 | 3627 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3628 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3629 | } |
c3f6f71d JM |
3630 | } |
3631 | else | |
3632 | { | |
3633 | /* This long block is reached if either: | |
3634 | a) the child was already stopped, or | |
3635 | b) we successfully waited for the child with wait_for_stop. | |
3636 | This block will analyze the /proc status, and translate it | |
3637 | into a waitstatus for GDB. | |
3638 | ||
3639 | If we actually had to call wait because the /proc file | |
19958708 | 3640 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3641 | because we already have a waitstatus. */ |
3642 | ||
3643 | flags = proc_flags (pi); | |
3644 | why = proc_why (pi); | |
3645 | what = proc_what (pi); | |
3646 | ||
c3f6f71d | 3647 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3648 | { |
c3f6f71d JM |
3649 | #ifdef PR_ASYNC |
3650 | /* If it's running async (for single_thread control), | |
3651 | set it back to normal again. */ | |
3652 | if (flags & PR_ASYNC) | |
3653 | if (!proc_unset_async (pi)) | |
3654 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3655 | #endif | |
3656 | ||
3657 | if (info_verbose) | |
3658 | proc_prettyprint_why (why, what, 1); | |
3659 | ||
3660 | /* The 'pid' we will return to GDB is composed of | |
3661 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 3662 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
3663 | |
3664 | switch (why) { | |
3665 | case PR_SIGNALLED: | |
3666 | wstat = (what << 8) | 0177; | |
3667 | break; | |
3668 | case PR_SYSENTRY: | |
37de36c6 | 3669 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3670 | { |
17faa917 DJ |
3671 | if (print_thread_events) |
3672 | printf_unfiltered (_("[%s exited]\n"), | |
3673 | target_pid_to_str (retval)); | |
37de36c6 KB |
3674 | delete_thread (retval); |
3675 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3676 | return retval; | |
3677 | } | |
3678 | else if (syscall_is_exit (pi, what)) | |
3679 | { | |
181e7f93 PA |
3680 | struct inferior *inf; |
3681 | ||
0df8b418 | 3682 | /* Handle SYS_exit call only. */ |
37de36c6 | 3683 | /* Stopped at entry to SYS_exit. |
19958708 | 3684 | Make it runnable, resume it, then use |
37de36c6 | 3685 | the wait system call to get its exit code. |
19958708 | 3686 | Proc_run_process always clears the current |
37de36c6 KB |
3687 | fault and signal. |
3688 | Then return its exit status. */ | |
3689 | pi->status_valid = 0; | |
3690 | wstat = 0; | |
19958708 | 3691 | /* FIXME: what we should do is return |
37de36c6 KB |
3692 | TARGET_WAITKIND_SPURIOUS. */ |
3693 | if (!proc_run_process (pi, 0, 0)) | |
3694 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3695 | |
3696 | inf = find_inferior_pid (pi->pid); | |
3697 | if (inf->attach_flag) | |
c3f6f71d | 3698 | { |
19958708 | 3699 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3700 | return a "success" exit code. Bogus: what if |
3701 | it returns something else? */ | |
3702 | wstat = 0; | |
39f77062 | 3703 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3704 | } |
3705 | else | |
3706 | { | |
3707 | int temp = wait (&wstat); | |
3708 | ||
3709 | /* FIXME: shouldn't I make sure I get the right | |
3710 | event from the right process? If (for | |
3711 | instance) I have killed an earlier inferior | |
3712 | process but failed to clean up after it | |
3713 | somehow, I could get its termination event | |
3714 | here. */ | |
3715 | ||
0df8b418 MS |
3716 | /* If wait returns -1, that's what we return |
3717 | to GDB. */ | |
37de36c6 | 3718 | if (temp < 0) |
39f77062 | 3719 | retval = pid_to_ptid (temp); |
c3f6f71d | 3720 | } |
c3f6f71d | 3721 | } |
37de36c6 KB |
3722 | else |
3723 | { | |
a3f17187 | 3724 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3725 | proc_prettyprint_syscall (proc_what (pi), 0); |
3726 | printf_filtered ("\n"); | |
3727 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3728 | { |
37de36c6 | 3729 | long i, nsysargs, *sysargs; |
c3f6f71d | 3730 | |
37de36c6 KB |
3731 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3732 | (sysargs = proc_sysargs (pi)) != NULL) | |
3733 | { | |
3e43a32a MS |
3734 | printf_filtered (_("%ld syscall arguments:\n"), |
3735 | nsysargs); | |
37de36c6 | 3736 | for (i = 0; i < nsysargs; i++) |
19958708 | 3737 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3738 | i, sysargs[i]); |
3739 | } | |
c3f6f71d | 3740 | |
c3f6f71d | 3741 | } |
c3f6f71d | 3742 | #endif |
37de36c6 KB |
3743 | if (status) |
3744 | { | |
0df8b418 MS |
3745 | /* How to exit gracefully, returning "unknown |
3746 | event". */ | |
37de36c6 | 3747 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3748 | return inferior_ptid; |
37de36c6 KB |
3749 | } |
3750 | else | |
3751 | { | |
3752 | /* How to keep going without returning to wfi: */ | |
a493e3e2 | 3753 | target_resume (ptid, 0, GDB_SIGNAL_0); |
37de36c6 KB |
3754 | goto wait_again; |
3755 | } | |
3756 | } | |
3757 | break; | |
3758 | case PR_SYSEXIT: | |
3759 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3760 | { |
37de36c6 KB |
3761 | /* Hopefully this is our own "fork-child" execing |
3762 | the real child. Hoax this event into a trap, and | |
3763 | GDB will see the child about to execute its start | |
0df8b418 | 3764 | address. */ |
37de36c6 KB |
3765 | wstat = (SIGTRAP << 8) | 0177; |
3766 | } | |
9185ddce | 3767 | #ifdef SYS_syssgi |
77382aee PA |
3768 | else if (what == SYS_syssgi) |
3769 | { | |
3770 | /* see if we can break on dbx_link(). If yes, then | |
3771 | we no longer need the SYS_syssgi notifications. */ | |
3772 | if (insert_dbx_link_breakpoint (pi)) | |
3773 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
3774 | FLAG_RESET, 0); | |
3775 | ||
3776 | /* This is an internal event and should be transparent | |
3777 | to wfi, so resume the execution and wait again. See | |
3778 | comment in procfs_init_inferior() for more details. */ | |
a493e3e2 | 3779 | target_resume (ptid, 0, GDB_SIGNAL_0); |
77382aee PA |
3780 | goto wait_again; |
3781 | } | |
9185ddce | 3782 | #endif |
37de36c6 KB |
3783 | else if (syscall_is_lwp_create (pi, what)) |
3784 | { | |
77382aee PA |
3785 | /* This syscall is somewhat like fork/exec. We |
3786 | will get the event twice: once for the parent | |
3787 | LWP, and once for the child. We should already | |
3788 | know about the parent LWP, but the child will | |
3789 | be new to us. So, whenever we get this event, | |
3790 | if it represents a new thread, simply add the | |
3791 | thread to the list. */ | |
c3f6f71d | 3792 | |
37de36c6 | 3793 | /* If not in procinfo list, add it. */ |
39f77062 KB |
3794 | temp_tid = proc_get_current_thread (pi); |
3795 | if (!find_procinfo (pi->pid, temp_tid)) | |
3796 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 3797 | |
dfd4cc63 | 3798 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 3799 | /* If not in GDB's thread list, add it. */ |
39f77062 | 3800 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
3801 | add_thread (temp_ptid); |
3802 | ||
0df8b418 | 3803 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 3804 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3805 | return inferior_ptid; |
37de36c6 KB |
3806 | } |
3807 | else if (syscall_is_lwp_exit (pi, what)) | |
3808 | { | |
17faa917 DJ |
3809 | if (print_thread_events) |
3810 | printf_unfiltered (_("[%s exited]\n"), | |
3811 | target_pid_to_str (retval)); | |
37de36c6 KB |
3812 | delete_thread (retval); |
3813 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3814 | return retval; | |
c3f6f71d | 3815 | } |
37de36c6 KB |
3816 | else if (0) |
3817 | { | |
3818 | /* FIXME: Do we need to handle SYS_sproc, | |
3819 | SYS_fork, or SYS_vfork here? The old procfs | |
3820 | seemed to use this event to handle threads on | |
3821 | older (non-LWP) systems, where I'm assuming | |
19958708 | 3822 | that threads were actually separate processes. |
37de36c6 KB |
3823 | Irix, maybe? Anyway, low priority for now. */ |
3824 | } | |
3825 | else | |
3826 | { | |
a3f17187 | 3827 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
3828 | proc_prettyprint_syscall (proc_what (pi), 0); |
3829 | printf_filtered ("\n"); | |
3830 | #ifndef PIOCSSPCACT | |
3831 | { | |
3832 | long i, nsysargs, *sysargs; | |
3833 | ||
3834 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3835 | (sysargs = proc_sysargs (pi)) != NULL) | |
3836 | { | |
77382aee PA |
3837 | printf_filtered (_("%ld syscall arguments:\n"), |
3838 | nsysargs); | |
37de36c6 | 3839 | for (i = 0; i < nsysargs; i++) |
19958708 | 3840 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3841 | i, sysargs[i]); |
3842 | } | |
3843 | } | |
c3f6f71d | 3844 | #endif |
37de36c6 | 3845 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3846 | return inferior_ptid; |
37de36c6 | 3847 | } |
c3f6f71d JM |
3848 | break; |
3849 | case PR_REQUESTED: | |
3850 | #if 0 /* FIXME */ | |
3851 | wstat = (SIGSTOP << 8) | 0177; | |
3852 | break; | |
3853 | #else | |
3854 | if (retry < 5) | |
3855 | { | |
a3f17187 | 3856 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
3857 | pi->status_valid = 0; |
3858 | goto wait_again; | |
3859 | } | |
3860 | else | |
3861 | { | |
3862 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
3863 | temp_tid = proc_get_current_thread (pi); |
3864 | if (!find_procinfo (pi->pid, temp_tid)) | |
3865 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
3866 | |
3867 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 3868 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 3869 | if (!in_thread_list (temp_ptid)) |
93815fbf | 3870 | add_thread (temp_ptid); |
c3f6f71d JM |
3871 | |
3872 | status->kind = TARGET_WAITKIND_STOPPED; | |
3873 | status->value.sig = 0; | |
3874 | return retval; | |
3875 | } | |
3876 | #endif | |
3877 | case PR_JOBCONTROL: | |
3878 | wstat = (what << 8) | 0177; | |
3879 | break; | |
3880 | case PR_FAULTED: | |
7af6341f | 3881 | switch (what) { |
c3f6f71d JM |
3882 | #ifdef FLTWATCH |
3883 | case FLTWATCH: | |
3884 | wstat = (SIGTRAP << 8) | 0177; | |
3885 | break; | |
3886 | #endif | |
3887 | #ifdef FLTKWATCH | |
3888 | case FLTKWATCH: | |
3889 | wstat = (SIGTRAP << 8) | 0177; | |
3890 | break; | |
3891 | #endif | |
0df8b418 | 3892 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 3893 | case FLTPRIV: |
0df8b418 | 3894 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3895 | case FLTILL: |
3896 | #endif | |
3897 | wstat = (SIGILL << 8) | 0177; | |
3898 | break; | |
3899 | case FLTBPT: | |
0df8b418 | 3900 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3901 | case FLTTRACE: |
3902 | #endif | |
77382aee PA |
3903 | /* If we hit our __dbx_link() internal breakpoint, |
3904 | then remove it. See comments in procfs_init_inferior() | |
3905 | for more details. */ | |
3906 | if (dbx_link_bpt_addr != 0 | |
3907 | && dbx_link_bpt_addr | |
fb14de7b | 3908 | == regcache_read_pc (get_current_regcache ())) |
77382aee | 3909 | remove_dbx_link_breakpoint (); |
9185ddce | 3910 | |
c3f6f71d JM |
3911 | wstat = (SIGTRAP << 8) | 0177; |
3912 | break; | |
3913 | case FLTSTACK: | |
3914 | case FLTACCESS: | |
0df8b418 | 3915 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3916 | case FLTBOUNDS: |
3917 | #endif | |
3918 | wstat = (SIGSEGV << 8) | 0177; | |
3919 | break; | |
3920 | case FLTIOVF: | |
3921 | case FLTIZDIV: | |
0df8b418 | 3922 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3923 | case FLTFPE: |
3924 | #endif | |
3925 | wstat = (SIGFPE << 8) | 0177; | |
3926 | break; | |
3e43a32a | 3927 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
3928 | default: /* FIXME: use si_signo if possible for |
3929 | fault. */ | |
39f77062 | 3930 | retval = pid_to_ptid (-1); |
c3f6f71d | 3931 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 3932 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3933 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3934 | error (_("... giving up...")); |
c3f6f71d JM |
3935 | break; |
3936 | } | |
3937 | break; /* case PR_FAULTED: */ | |
3938 | default: /* switch (why) unmatched */ | |
3939 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 3940 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3941 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3942 | error (_("... giving up...")); |
c3f6f71d JM |
3943 | break; |
3944 | } | |
77382aee PA |
3945 | /* Got this far without error: If retval isn't in the |
3946 | threads database, add it. */ | |
dfd4cc63 | 3947 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 3948 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 3949 | !in_thread_list (retval)) |
c906108c | 3950 | { |
77382aee PA |
3951 | /* We have a new thread. We need to add it both to |
3952 | GDB's list and to our own. If we don't create a | |
3953 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 3954 | add_thread (retval); |
dfd4cc63 LM |
3955 | if (find_procinfo (ptid_get_pid (retval), |
3956 | ptid_get_lwp (retval)) == NULL) | |
3957 | create_procinfo (ptid_get_pid (retval), | |
3958 | ptid_get_lwp (retval)); | |
c906108c | 3959 | } |
c906108c | 3960 | } |
0df8b418 | 3961 | else /* Flags do not indicate STOPPED. */ |
c906108c | 3962 | { |
0df8b418 | 3963 | /* surely this can't happen... */ |
c3f6f71d JM |
3964 | printf_filtered ("procfs:%d -- process not stopped.\n", |
3965 | __LINE__); | |
3966 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 3967 | error (_("procfs: ...giving up...")); |
c906108c | 3968 | } |
c906108c | 3969 | } |
c906108c | 3970 | |
c3f6f71d JM |
3971 | if (status) |
3972 | store_waitstatus (status, wstat); | |
c906108c SS |
3973 | } |
3974 | ||
c3f6f71d JM |
3975 | return retval; |
3976 | } | |
c906108c | 3977 | |
4e73f23d RM |
3978 | /* Perform a partial transfer to/from the specified object. For |
3979 | memory transfers, fall back to the old memory xfer functions. */ | |
3980 | ||
3981 | static LONGEST | |
3982 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, | |
0b62613e PA |
3983 | const char *annex, gdb_byte *readbuf, |
3984 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
4e73f23d RM |
3985 | { |
3986 | switch (object) | |
3987 | { | |
3988 | case TARGET_OBJECT_MEMORY: | |
3989 | if (readbuf) | |
0b62613e PA |
3990 | return (*ops->deprecated_xfer_memory) (offset, readbuf, |
3991 | len, 0/*read*/, NULL, ops); | |
4e73f23d | 3992 | if (writebuf) |
0b62613e PA |
3993 | return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf, |
3994 | len, 1/*write*/, NULL, ops); | |
4e73f23d RM |
3995 | return -1; |
3996 | ||
3997 | #ifdef NEW_PROC_API | |
3998 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 3999 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
4e73f23d RM |
4000 | offset, len); |
4001 | #endif | |
4002 | ||
4003 | default: | |
4004 | if (ops->beneath != NULL) | |
4005 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
4006 | readbuf, writebuf, offset, len); | |
4007 | return -1; | |
4008 | } | |
4009 | } | |
4010 | ||
4011 | ||
d0849a9a KB |
4012 | /* Transfer LEN bytes between GDB address MYADDR and target address |
4013 | MEMADDR. If DOWRITE is non-zero, transfer them to the target, | |
4014 | otherwise transfer them from the target. TARGET is unused. | |
4015 | ||
4016 | The return value is 0 if an error occurred or no bytes were | |
4017 | transferred. Otherwise, it will be a positive value which | |
4018 | indicates the number of bytes transferred between gdb and the | |
4019 | target. (Note that the interface also makes provisions for | |
0df8b418 | 4020 | negative values, but this capability isn't implemented here.) */ |
d0849a9a | 4021 | |
c3f6f71d | 4022 | static int |
0b62613e | 4023 | procfs_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int dowrite, |
37de36c6 | 4024 | struct mem_attrib *attrib, struct target_ops *target) |
c3f6f71d JM |
4025 | { |
4026 | procinfo *pi; | |
4027 | int nbytes = 0; | |
c906108c | 4028 | |
0df8b418 | 4029 | /* Find procinfo for main process. */ |
dfd4cc63 | 4030 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4031 | if (pi->as_fd == 0 && |
4032 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 4033 | { |
c3f6f71d JM |
4034 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
4035 | return 0; | |
c906108c | 4036 | } |
c906108c | 4037 | |
c3f6f71d | 4038 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
c906108c | 4039 | { |
c3f6f71d | 4040 | if (dowrite) |
c906108c | 4041 | { |
c3f6f71d | 4042 | #ifdef NEW_PROC_API |
cce7e648 | 4043 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4044 | #else |
cce7e648 | 4045 | PROCFS_NOTE ("write memory:\n"); |
c906108c | 4046 | #endif |
c3f6f71d | 4047 | nbytes = write (pi->as_fd, myaddr, len); |
c906108c | 4048 | } |
c3f6f71d | 4049 | else |
c906108c | 4050 | { |
cce7e648 | 4051 | PROCFS_NOTE ("read memory:\n"); |
c3f6f71d | 4052 | nbytes = read (pi->as_fd, myaddr, len); |
c906108c | 4053 | } |
c3f6f71d | 4054 | if (nbytes < 0) |
c906108c | 4055 | { |
c3f6f71d | 4056 | nbytes = 0; |
c906108c | 4057 | } |
c906108c | 4058 | } |
c3f6f71d | 4059 | return nbytes; |
c906108c SS |
4060 | } |
4061 | ||
77382aee PA |
4062 | /* Called by target_resume before making child runnable. Mark cached |
4063 | registers and status's invalid. If there are "dirty" caches that | |
4064 | need to be written back to the child process, do that. | |
c906108c | 4065 | |
77382aee PA |
4066 | File descriptors are also cached. As they are a limited resource, |
4067 | we cannot hold onto them indefinitely. However, as they are | |
4068 | expensive to open, we don't want to throw them away | |
4069 | indescriminately either. As a compromise, we will keep the file | |
4070 | descriptors for the parent process, but discard any file | |
4071 | descriptors we may have accumulated for the threads. | |
4072 | ||
4073 | As this function is called by iterate_over_threads, it always | |
4074 | returns zero (so that iterate_over_threads will keep | |
4075 | iterating). */ | |
c3f6f71d JM |
4076 | |
4077 | static int | |
fba45db2 | 4078 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4079 | { |
77382aee PA |
4080 | /* About to run the child; invalidate caches and do any other |
4081 | cleanup. */ | |
c906108c | 4082 | |
c3f6f71d JM |
4083 | #if 0 |
4084 | if (pi->gregs_dirty) | |
4085 | if (parent == NULL || | |
4086 | proc_get_current_thread (parent) != pi->tid) | |
4087 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4088 | proc_warn (pi, "target_resume, set_gregs", | |
4089 | __LINE__); | |
f5656ead | 4090 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
4091 | if (pi->fpregs_dirty) |
4092 | if (parent == NULL || | |
4093 | proc_get_current_thread (parent) != pi->tid) | |
4094 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4095 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4096 | __LINE__); |
c906108c | 4097 | #endif |
c906108c | 4098 | |
c3f6f71d | 4099 | if (parent != NULL) |
c906108c | 4100 | { |
c3f6f71d | 4101 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4102 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4103 | We don't do this to the master (parent) procinfo. */ |
4104 | ||
4105 | close_procinfo_files (pi); | |
c906108c | 4106 | } |
c3f6f71d JM |
4107 | pi->gregs_valid = 0; |
4108 | pi->fpregs_valid = 0; | |
4109 | #if 0 | |
4110 | pi->gregs_dirty = 0; | |
4111 | pi->fpregs_dirty = 0; | |
c906108c | 4112 | #endif |
c3f6f71d JM |
4113 | pi->status_valid = 0; |
4114 | pi->threads_valid = 0; | |
c906108c | 4115 | |
c3f6f71d | 4116 | return 0; |
c906108c SS |
4117 | } |
4118 | ||
0fda6bd2 | 4119 | #if 0 |
77382aee PA |
4120 | /* A callback function for iterate_over_threads. Find the |
4121 | asynchronous signal thread, and make it runnable. See if that | |
4122 | helps matters any. */ | |
c906108c | 4123 | |
c3f6f71d | 4124 | static int |
fba45db2 | 4125 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4126 | { |
c3f6f71d JM |
4127 | #ifdef PR_ASLWP |
4128 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4129 | { |
c3f6f71d JM |
4130 | if (!proc_run_process (pi, 0, -1)) |
4131 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4132 | return 1; | |
c906108c | 4133 | } |
c906108c | 4134 | #endif |
c3f6f71d | 4135 | return 0; |
c906108c | 4136 | } |
0fda6bd2 | 4137 | #endif |
c906108c | 4138 | |
77382aee PA |
4139 | /* Make the child process runnable. Normally we will then call |
4140 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4141 | ||
4142 | If STEP is true, then arrange for the child to stop again after | |
4143 | executing a single instruction. If SIGNO is zero, then cancel any | |
4144 | pending signal; if non-zero, then arrange for the indicated signal | |
4145 | to be delivered to the child when it runs. If PID is -1, then | |
4146 | allow any child thread to run; if non-zero, then allow only the | |
4147 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4148 | |
4149 | static void | |
28439f5e | 4150 | procfs_resume (struct target_ops *ops, |
2ea28649 | 4151 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 4152 | { |
c3f6f71d JM |
4153 | procinfo *pi, *thread; |
4154 | int native_signo; | |
4155 | ||
19958708 | 4156 | /* 2.1: |
c3f6f71d | 4157 | prrun.prflags |= PRSVADDR; |
19958708 | 4158 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4159 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4160 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4161 | prrun.prflags |= PRCFAULT; clear current fault. |
4162 | ||
4163 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4164 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4165 | PRSVADDR is unnecessary. |
4166 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4167 | This basically leaves PRSTEP and PRCSIG. | |
4168 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4169 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4170 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4171 | |
0df8b418 | 4172 | /* Find procinfo for main process. */ |
dfd4cc63 | 4173 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 4174 | |
77382aee | 4175 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4176 | errno = 0; |
c906108c | 4177 | |
c3f6f71d JM |
4178 | /* Convert signal to host numbering. */ |
4179 | if (signo == 0 || | |
a493e3e2 | 4180 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4181 | native_signo = 0; |
4182 | else | |
2ea28649 | 4183 | native_signo = gdb_signal_to_host (signo); |
c906108c | 4184 | |
c3f6f71d | 4185 | pi->ignore_next_sigstop = 0; |
c906108c | 4186 | |
77382aee PA |
4187 | /* Running the process voids all cached registers and status. */ |
4188 | /* Void the threads' caches first. */ | |
19958708 | 4189 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4190 | /* Void the process procinfo's caches. */ |
4191 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4192 | |
dfd4cc63 | 4193 | if (ptid_get_pid (ptid) != -1) |
c906108c | 4194 | { |
77382aee PA |
4195 | /* Resume a specific thread, presumably suppressing the |
4196 | others. */ | |
dfd4cc63 | 4197 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 4198 | if (thread != NULL) |
c906108c | 4199 | { |
c3f6f71d JM |
4200 | if (thread->tid != 0) |
4201 | { | |
77382aee PA |
4202 | /* We're to resume a specific thread, and not the |
4203 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4204 | #ifdef PR_ASYNC |
4205 | if (!proc_set_async (pi)) | |
4206 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4207 | #endif | |
4208 | #if 0 | |
19958708 | 4209 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4210 | make_signal_thread_runnable, |
4211 | NULL); | |
4212 | #endif | |
0df8b418 MS |
4213 | pi = thread; /* Substitute the thread's procinfo |
4214 | for run. */ | |
c3f6f71d | 4215 | } |
c906108c SS |
4216 | } |
4217 | } | |
c906108c | 4218 | |
c3f6f71d | 4219 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4220 | { |
c3f6f71d | 4221 | if (errno == EBUSY) |
77382aee PA |
4222 | warning (_("resume: target already running. " |
4223 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4224 | else |
4225 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4226 | } |
c3f6f71d | 4227 | } |
c906108c | 4228 | |
77382aee | 4229 | /* Set up to trace signals in the child process. */ |
c906108c | 4230 | |
c3f6f71d | 4231 | static void |
2455069d | 4232 | procfs_pass_signals (int numsigs, unsigned char *pass_signals) |
c3f6f71d | 4233 | { |
37de36c6 | 4234 | gdb_sigset_t signals; |
dfd4cc63 | 4235 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 4236 | int signo; |
c906108c | 4237 | |
2455069d UW |
4238 | prfillset (&signals); |
4239 | ||
4240 | for (signo = 0; signo < NSIG; signo++) | |
4241 | { | |
2ea28649 | 4242 | int target_signo = gdb_signal_from_host (signo); |
2455069d UW |
4243 | if (target_signo < numsigs && pass_signals[target_signo]) |
4244 | gdb_prdelset (&signals, signo); | |
4245 | } | |
4246 | ||
4247 | if (!proc_set_traced_signals (pi, &signals)) | |
4248 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4249 | } |
c906108c | 4250 | |
77382aee | 4251 | /* Print status information about the child process. */ |
c906108c | 4252 | |
c3f6f71d | 4253 | static void |
fba45db2 | 4254 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4255 | { |
181e7f93 | 4256 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4257 | |
a3f17187 | 4258 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4259 | inf->attach_flag? "attached": "child", |
39f77062 | 4260 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4261 | } |
c906108c | 4262 | |
77382aee PA |
4263 | /* Stop the child process asynchronously, as when the gdb user types |
4264 | control-c or presses a "stop" button. Works by sending | |
4265 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4266 | |
c3f6f71d | 4267 | static void |
f9c72d52 | 4268 | procfs_stop (ptid_t ptid) |
c3f6f71d | 4269 | { |
7e1789f5 | 4270 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4271 | } |
4272 | ||
77382aee PA |
4273 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4274 | should only be applied to the real process, not to an LWP, because | |
4275 | of the check for parent-process. If we need this to work for an | |
4276 | LWP, it needs some more logic. */ | |
c906108c | 4277 | |
c3f6f71d | 4278 | static void |
fba45db2 | 4279 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4280 | { |
4281 | int parent_pid; | |
c906108c | 4282 | |
c3f6f71d JM |
4283 | parent_pid = proc_parent_pid (pi); |
4284 | #ifdef PROCFS_NEED_CLEAR_CURSIG_FOR_KILL | |
0df8b418 | 4285 | /* FIXME: use access functions. */ |
c3f6f71d JM |
4286 | /* Alpha OSF/1-3.x procfs needs a clear of the current signal |
4287 | before the PIOCKILL, otherwise it might generate a corrupted core | |
4288 | file for the inferior. */ | |
4289 | if (ioctl (pi->ctl_fd, PIOCSSIG, NULL) < 0) | |
4290 | { | |
4291 | printf_filtered ("unconditionally_kill: SSIG failed!\n"); | |
4292 | } | |
4293 | #endif | |
4294 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL | |
4295 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4296 | to kill the inferior, otherwise it might remain stopped with a | |
4297 | pending SIGKILL. | |
4298 | We do not check the result of the PIOCSSIG, the inferior might have | |
4299 | died already. */ | |
4300 | { | |
37de36c6 | 4301 | gdb_siginfo_t newsiginfo; |
c906108c | 4302 | |
c3f6f71d JM |
4303 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4304 | newsiginfo.si_signo = SIGKILL; | |
4305 | newsiginfo.si_code = 0; | |
4306 | newsiginfo.si_errno = 0; | |
4307 | newsiginfo.si_pid = getpid (); | |
4308 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4309 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4310 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4311 | } | |
4312 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4313 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4314 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4315 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4316 | destroy_procinfo (pi); | |
c906108c | 4317 | |
c3f6f71d JM |
4318 | /* If pi is GDB's child, wait for it to die. */ |
4319 | if (parent_pid == getpid ()) | |
19958708 | 4320 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4321 | Should we check the returned event? */ |
4322 | { | |
0d06e24b | 4323 | #if 0 |
c3f6f71d | 4324 | int status, ret; |
c906108c | 4325 | |
c3f6f71d JM |
4326 | ret = waitpid (pi->pid, &status, 0); |
4327 | #else | |
4328 | wait (NULL); | |
4329 | #endif | |
4330 | } | |
4331 | } | |
c906108c | 4332 | |
77382aee PA |
4333 | /* We're done debugging it, and we want it to go away. Then we want |
4334 | GDB to forget all about it. */ | |
c906108c | 4335 | |
19958708 | 4336 | static void |
7d85a9c0 | 4337 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4338 | { |
39f77062 | 4339 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4340 | { |
0df8b418 | 4341 | /* Find procinfo for main process. */ |
dfd4cc63 | 4342 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 4343 | |
c3f6f71d JM |
4344 | if (pi) |
4345 | unconditionally_kill_inferior (pi); | |
4346 | target_mourn_inferior (); | |
c906108c | 4347 | } |
c3f6f71d JM |
4348 | } |
4349 | ||
77382aee | 4350 | /* Forget we ever debugged this thing! */ |
c906108c | 4351 | |
19958708 | 4352 | static void |
136d6dae | 4353 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4354 | { |
4355 | procinfo *pi; | |
c906108c | 4356 | |
39f77062 | 4357 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4358 | { |
0df8b418 | 4359 | /* Find procinfo for main process. */ |
dfd4cc63 | 4360 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4361 | if (pi) |
4362 | destroy_procinfo (pi); | |
c906108c | 4363 | } |
28439f5e | 4364 | unpush_target (ops); |
8181d85f DJ |
4365 | |
4366 | if (dbx_link_bpt != NULL) | |
4367 | { | |
f5656ead | 4368 | deprecated_remove_raw_breakpoint (target_gdbarch (), dbx_link_bpt); |
8181d85f DJ |
4369 | dbx_link_bpt_addr = 0; |
4370 | dbx_link_bpt = NULL; | |
4371 | } | |
4372 | ||
c3f6f71d JM |
4373 | generic_mourn_inferior (); |
4374 | } | |
c906108c | 4375 | |
77382aee PA |
4376 | /* When GDB forks to create a runnable inferior process, this function |
4377 | is called on the parent side of the fork. It's job is to do | |
4378 | whatever is necessary to make the child ready to be debugged, and | |
4379 | then wait for the child to synchronize. */ | |
c906108c | 4380 | |
19958708 | 4381 | static void |
28439f5e | 4382 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4383 | { |
4384 | procinfo *pi; | |
37de36c6 | 4385 | gdb_sigset_t signals; |
c3f6f71d | 4386 | int fail; |
2689673f | 4387 | int lwpid; |
c906108c | 4388 | |
c3f6f71d JM |
4389 | /* This routine called on the parent side (GDB side) |
4390 | after GDB forks the inferior. */ | |
28439f5e | 4391 | push_target (ops); |
c906108c | 4392 | |
c3f6f71d | 4393 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4394 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4395 | |
4396 | if (!open_procinfo_files (pi, FD_CTL)) | |
4397 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4398 | ||
4399 | /* | |
4400 | xmalloc // done | |
4401 | open_procinfo_files // done | |
4402 | link list // done | |
4403 | prfillset (trace) | |
4404 | procfs_notice_signals | |
4405 | prfillset (fault) | |
4406 | prdelset (FLTPAGE) | |
4407 | PIOCWSTOP | |
4408 | PIOCSFAULT | |
4409 | */ | |
4410 | ||
77382aee | 4411 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4412 | if (!(proc_flags (pi) & PR_STOPPED) && |
4413 | !(proc_wait_for_stop (pi))) | |
4414 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4415 | ||
4416 | /* Save some of the /proc state to be restored if we detach. */ | |
4417 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4418 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4419 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4420 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4421 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4422 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4423 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4424 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4425 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4426 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4427 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4428 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4429 | ||
c3f6f71d JM |
4430 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4431 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4432 | ||
0d06e24b JM |
4433 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4434 | and possibly even turning ON kill-on-last-close at this point. But | |
4435 | I can't make that change without careful testing which I don't have | |
4436 | time to do right now... */ | |
c3f6f71d JM |
4437 | /* Turn on run-on-last-close flag so that the child |
4438 | will die if GDB goes away for some reason. */ | |
4439 | if (!proc_set_run_on_last_close (pi)) | |
4440 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4441 | ||
2689673f PA |
4442 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4443 | lwpid = proc_get_current_thread (pi); | |
4444 | ||
4445 | /* Create a procinfo for the main lwp. */ | |
4446 | create_procinfo (pid, lwpid); | |
4447 | ||
4448 | /* We already have a main thread registered in the thread table at | |
4449 | this point, but it didn't have any lwp info yet. Notify the core | |
4450 | about it. This changes inferior_ptid as well. */ | |
4451 | thread_change_ptid (pid_to_ptid (pid), | |
dfd4cc63 | 4452 | ptid_build (pid, lwpid), 0); |
c906108c | 4453 | |
46ac7a5d AC |
4454 | /* Typically two, one trap to exec the shell, one to exec the |
4455 | program being debugged. Defined by "inferior.h". */ | |
c3f6f71d | 4456 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4457 | |
4458 | #ifdef SYS_syssgi | |
4459 | /* On mips-irix, we need to stop the inferior early enough during | |
4460 | the startup phase in order to be able to load the shared library | |
4461 | symbols and insert the breakpoints that are located in these shared | |
4462 | libraries. Stopping at the program entry point is not good enough | |
4463 | because the -init code is executed before the execution reaches | |
4464 | that point. | |
4465 | ||
4466 | So what we need to do is to insert a breakpoint in the runtime | |
4467 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4468 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4469 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4470 | as rld is not part of the executable we are running, and thus we need |
4471 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4472 | |
9185ddce JB |
4473 | For this, we trace all syssgi() syscall exit events. Each time |
4474 | we detect such an event, we iterate over each text memory maps, | |
4475 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4476 | When found, we know that rld has been mapped, and that we can insert | |
4477 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4478 | has been inserted, the syssgi() notifications are no longer necessary, | |
4479 | so they should be canceled. */ | |
4480 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4481 | #endif |
c3f6f71d | 4482 | } |
c906108c | 4483 | |
77382aee PA |
4484 | /* When GDB forks to create a new process, this function is called on |
4485 | the child side of the fork before GDB exec's the user program. Its | |
4486 | job is to make the child minimally debuggable, so that the parent | |
4487 | GDB process can connect to the child and take over. This function | |
4488 | should do only the minimum to make that possible, and to | |
4489 | synchronize with the parent process. The parent process should | |
4490 | take care of the details. */ | |
c3f6f71d JM |
4491 | |
4492 | static void | |
fba45db2 | 4493 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4494 | { |
4495 | /* This routine called on the child side (inferior side) | |
4496 | after GDB forks the inferior. It must use only local variables, | |
4497 | because it may be sharing data space with its parent. */ | |
c906108c | 4498 | |
c3f6f71d | 4499 | procinfo *pi; |
37de36c6 | 4500 | sysset_t *exitset; |
c906108c | 4501 | |
c3f6f71d | 4502 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4503 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4504 | |
c3f6f71d JM |
4505 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4506 | { | |
4507 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4508 | gdb_flush (gdb_stderr); | |
77382aee PA |
4509 | /* No need to call "dead_procinfo", because we're going to |
4510 | exit. */ | |
c3f6f71d JM |
4511 | _exit (127); |
4512 | } | |
c906108c | 4513 | |
c3f6f71d JM |
4514 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4515 | /* OSF method for tracing exec syscalls. Quoting: | |
4516 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4517 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4518 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4519 | { |
4520 | int prfs_flags; | |
c906108c | 4521 | |
c3f6f71d JM |
4522 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4523 | { | |
4524 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4525 | gdb_flush (gdb_stderr); | |
4526 | _exit (127); | |
4527 | } | |
4528 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4529 | |
c3f6f71d JM |
4530 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4531 | { | |
4532 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4533 | gdb_flush (gdb_stderr); | |
4534 | _exit (127); | |
4535 | } | |
4536 | } | |
4537 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4538 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4539 | /* GW: Rationale... |
4540 | Not all systems with /proc have all the exec* syscalls with the same | |
4541 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4542 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4543 | |
37de36c6 KB |
4544 | exitset = sysset_t_alloc (pi); |
4545 | gdb_premptysysset (exitset); | |
c3f6f71d | 4546 | #ifdef SYS_exec |
37de36c6 | 4547 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4548 | #endif |
4549 | #ifdef SYS_execve | |
37de36c6 | 4550 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4551 | #endif |
4552 | #ifdef SYS_execv | |
37de36c6 | 4553 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4554 | #endif |
37de36c6 KB |
4555 | #ifdef DYNAMIC_SYSCALLS |
4556 | { | |
4557 | int callnum = find_syscall (pi, "execve"); | |
4558 | ||
4559 | if (callnum >= 0) | |
4560 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4561 | |
37de36c6 KB |
4562 | callnum = find_syscall (pi, "ra_execve"); |
4563 | if (callnum >= 0) | |
4564 | gdb_praddsysset (exitset, callnum); | |
4565 | } | |
4566 | #endif /* DYNAMIC_SYSCALLS */ | |
4567 | ||
4568 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4569 | { |
c3f6f71d JM |
4570 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4571 | gdb_flush (gdb_stderr); | |
4572 | _exit (127); | |
c906108c | 4573 | } |
c3f6f71d JM |
4574 | #endif /* PRFS_STOPEXEC */ |
4575 | ||
0df8b418 | 4576 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4577 | /* Turn off inherit on fork flag so that all grand-children |
4578 | of gdb start with tracing flags cleared. */ | |
4579 | if (!proc_unset_inherit_on_fork (pi)) | |
4580 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4581 | ||
4582 | /* Turn off run on last close flag, so that the child process | |
4583 | cannot run away just because we close our handle on it. | |
4584 | We want it to wait for the parent to attach. */ | |
4585 | if (!proc_unset_run_on_last_close (pi)) | |
4586 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4587 | ||
19958708 | 4588 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4589 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4590 | /*destroy_procinfo (pi);*/ |
c906108c | 4591 | } |
c906108c | 4592 | |
77382aee PA |
4593 | /* This function is called BEFORE gdb forks the inferior process. Its |
4594 | only real responsibility is to set things up for the fork, and tell | |
4595 | GDB which two functions to call after the fork (one for the parent, | |
4596 | and one for the child). | |
4597 | ||
4598 | This function does a complicated search for a unix shell program, | |
4599 | which it then uses to parse arguments and environment variables to | |
4600 | be sent to the child. I wonder whether this code could not be | |
4601 | abstracted out and shared with other unix targets such as | |
4602 | inf-ptrace? */ | |
c906108c SS |
4603 | |
4604 | static void | |
136d6dae VP |
4605 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4606 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4607 | { |
4608 | char *shell_file = getenv ("SHELL"); | |
4609 | char *tryname; | |
28439f5e PA |
4610 | int pid; |
4611 | ||
c906108c SS |
4612 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4613 | { | |
4614 | ||
4615 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4616 | just do this the normal way (via execlp, which operates by |
4617 | attempting an exec for each element of the PATH until it | |
4618 | finds one which succeeds), then there will be an exec for | |
4619 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4620 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4621 | for these failed execs with the ones for successful execs | |
4622 | (whether the exec has succeeded is stored at that time in the | |
4623 | carry bit or some such architecture-specific and | |
4624 | non-ABI-specified place). | |
4625 | ||
4626 | So I can't think of anything better than to search the PATH | |
4627 | now. This has several disadvantages: (1) There is a race | |
4628 | condition; if we find a file now and it is deleted before we | |
4629 | exec it, we lose, even if the deletion leaves a valid file | |
4630 | further down in the PATH, (2) there is no way to know exactly | |
4631 | what an executable (in the sense of "capable of being | |
4632 | exec'd") file is. Using access() loses because it may lose | |
4633 | if the caller is the superuser; failing to use it loses if | |
4634 | there are ACLs or some such. */ | |
c906108c SS |
4635 | |
4636 | char *p; | |
4637 | char *p1; | |
4638 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4639 | path is used from within GDB. */ |
c906108c SS |
4640 | char *path = getenv ("PATH"); |
4641 | int len; | |
4642 | struct stat statbuf; | |
4643 | ||
4644 | if (path == NULL) | |
4645 | path = "/bin:/usr/bin"; | |
4646 | ||
4647 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4648 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4649 | { |
4650 | p1 = strchr (p, ':'); | |
4651 | if (p1 != NULL) | |
4652 | len = p1 - p; | |
4653 | else | |
4654 | len = strlen (p); | |
4655 | strncpy (tryname, p, len); | |
4656 | tryname[len] = '\0'; | |
4657 | strcat (tryname, "/"); | |
4658 | strcat (tryname, shell_file); | |
4659 | if (access (tryname, X_OK) < 0) | |
4660 | continue; | |
4661 | if (stat (tryname, &statbuf) < 0) | |
4662 | continue; | |
4663 | if (!S_ISREG (statbuf.st_mode)) | |
4664 | /* We certainly need to reject directories. I'm not quite | |
4665 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4666 | that people want to exec() these things. */ | |
4667 | continue; | |
4668 | break; | |
4669 | } | |
4670 | if (p == NULL) | |
4671 | /* Not found. This must be an error rather than merely passing | |
4672 | the file to execlp(), because execlp() would try all the | |
4673 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4674 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4675 | __LINE__, shell_file); |
c906108c SS |
4676 | |
4677 | shell_file = tryname; | |
4678 | } | |
4679 | ||
28439f5e | 4680 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4681 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4682 | |
4683 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4684 | } |
4685 | ||
4686 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4687 | |
27087a3d JB |
4688 | static void |
4689 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4690 | { | |
9185ddce | 4691 | #ifdef SYS_syssgi |
77382aee | 4692 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4693 | They should normally have been removed by now, but they may still |
4694 | be activated if the inferior doesn't use shared libraries, or if | |
4695 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4696 | See procfs_init_inferior() for more details. |
4697 | ||
4698 | Since these notifications are only ever enabled when we spawned | |
4699 | the inferior ourselves, there is nothing to do when the inferior | |
4700 | was created by attaching to an already running process, or when | |
4701 | debugging a core file. */ | |
4702 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4703 | return; | |
4704 | ||
dfd4cc63 LM |
4705 | proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
4706 | 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
9185ddce | 4707 | #endif |
c906108c SS |
4708 | } |
4709 | ||
77382aee | 4710 | /* Callback for find_new_threads. Calls "add_thread". */ |
c906108c | 4711 | |
c3f6f71d | 4712 | static int |
fba45db2 | 4713 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4714 | { |
dfd4cc63 | 4715 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 4716 | |
2689673f | 4717 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4718 | add_thread (gdb_threadid); |
c906108c | 4719 | |
c3f6f71d JM |
4720 | return 0; |
4721 | } | |
4722 | ||
77382aee PA |
4723 | /* Query all the threads that the target knows about, and give them |
4724 | back to GDB to add to its list. */ | |
c3f6f71d | 4725 | |
d3581e61 | 4726 | static void |
28439f5e | 4727 | procfs_find_new_threads (struct target_ops *ops) |
c3f6f71d JM |
4728 | { |
4729 | procinfo *pi; | |
4730 | ||
0df8b418 | 4731 | /* Find procinfo for main process. */ |
dfd4cc63 | 4732 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4733 | proc_update_threads (pi); |
4734 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4735 | } |
4736 | ||
77382aee PA |
4737 | /* Return true if the thread is still 'alive'. This guy doesn't |
4738 | really seem to be doing his job. Got to investigate how to tell | |
4739 | when a thread is really gone. */ | |
c906108c | 4740 | |
c906108c | 4741 | static int |
28439f5e | 4742 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4743 | { |
c3f6f71d JM |
4744 | int proc, thread; |
4745 | procinfo *pi; | |
c906108c | 4746 | |
dfd4cc63 LM |
4747 | proc = ptid_get_pid (ptid); |
4748 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 4749 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4750 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4751 | return 0; | |
4752 | ||
4753 | /* If I can't get its status, it ain't alive! | |
4754 | What's more, I need to forget about it! */ | |
4755 | if (!proc_get_status (pi)) | |
4756 | { | |
4757 | destroy_procinfo (pi); | |
4758 | return 0; | |
4759 | } | |
77382aee PA |
4760 | /* I couldn't have got its status if it weren't alive, so it's |
4761 | alive. */ | |
c3f6f71d | 4762 | return 1; |
c906108c | 4763 | } |
c3f6f71d | 4764 | |
77382aee PA |
4765 | /* Convert PTID to a string. Returns the string in a static |
4766 | buffer. */ | |
c3f6f71d | 4767 | |
d3581e61 | 4768 | static char * |
117de6a9 | 4769 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
4770 | { |
4771 | static char buf[80]; | |
c3f6f71d | 4772 | |
dfd4cc63 LM |
4773 | if (ptid_get_lwp (ptid) == 0) |
4774 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 4775 | else |
dfd4cc63 | 4776 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
4777 | |
4778 | return buf; | |
c3f6f71d JM |
4779 | } |
4780 | ||
77382aee | 4781 | /* Insert a watchpoint. */ |
c3f6f71d | 4782 | |
a0911fd0 | 4783 | static int |
39f77062 | 4784 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 4785 | int after) |
c906108c | 4786 | { |
37de36c6 | 4787 | #ifndef AIX5 |
c3f6f71d | 4788 | int pflags = 0; |
19958708 | 4789 | procinfo *pi; |
c3f6f71d | 4790 | |
dfd4cc63 LM |
4791 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
4792 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
4793 | 0); | |
c3f6f71d | 4794 | |
0df8b418 MS |
4795 | /* Translate from GDB's flags to /proc's. */ |
4796 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 4797 | { |
0df8b418 | 4798 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
4799 | case hw_write: /* default watchpoint (write) */ |
4800 | pflags = WRITE_WATCHFLAG; | |
4801 | break; | |
4802 | case hw_read: /* read watchpoint */ | |
4803 | pflags = READ_WATCHFLAG; | |
4804 | break; | |
4805 | case hw_access: /* access watchpoint */ | |
4806 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4807 | break; | |
4808 | case hw_execute: /* execution HW breakpoint */ | |
4809 | pflags = EXEC_WATCHFLAG; | |
4810 | break; | |
0df8b418 | 4811 | default: /* Something weird. Return error. */ |
c906108c | 4812 | return -1; |
c3f6f71d | 4813 | } |
0df8b418 | 4814 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
4815 | pflags |= AFTER_WATCHFLAG; |
4816 | } | |
4817 | ||
4818 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4819 | { | |
0df8b418 | 4820 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
4821 | return -1; /* fail */ |
4822 | /* GDB may try to remove the same watchpoint twice. | |
4823 | If a remove request returns no match, don't error. */ | |
c906108c | 4824 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4825 | return 0; /* ignore */ |
4826 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4827 | } |
37de36c6 | 4828 | #endif /* AIX5 */ |
c906108c SS |
4829 | return 0; |
4830 | } | |
4831 | ||
1e03ad20 KB |
4832 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
4833 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
4834 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
4835 | far. | |
19958708 | 4836 | |
1e03ad20 KB |
4837 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
4838 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 4839 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
4840 | |
4841 | static int | |
4842 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
4843 | { | |
1e03ad20 KB |
4844 | /* Due to the way that proc_set_watchpoint() is implemented, host |
4845 | and target pointers must be of the same size. If they are not, | |
4846 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
4847 | fact that proc_set_watchpoint() calls |
4848 | procfs_address_to_host_pointer(); a close inspection of | |
4849 | procfs_address_to_host_pointer will reveal that an internal error | |
4850 | will be generated when the host and target pointer sizes are | |
4851 | different. */ | |
f5656ead | 4852 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 4853 | |
4e906f53 | 4854 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
4855 | return 0; |
4856 | ||
4857 | /* Other tests here??? */ | |
4858 | ||
4859 | return 1; | |
1e03ad20 KB |
4860 | } |
4861 | ||
77382aee PA |
4862 | /* Returns non-zero if process is stopped on a hardware watchpoint |
4863 | fault, else returns zero. */ | |
c3f6f71d | 4864 | |
25513619 PA |
4865 | static int |
4866 | procfs_stopped_by_watchpoint (void) | |
c906108c | 4867 | { |
c3f6f71d | 4868 | procinfo *pi; |
c906108c | 4869 | |
dfd4cc63 | 4870 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 4871 | |
c3f6f71d | 4872 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4873 | { |
c3f6f71d | 4874 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 4875 | { |
c906108c | 4876 | #ifdef FLTWATCH |
c3f6f71d JM |
4877 | if (proc_what (pi) == FLTWATCH) |
4878 | return 1; | |
c906108c SS |
4879 | #endif |
4880 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4881 | if (proc_what (pi) == FLTKWATCH) |
4882 | return 1; | |
c906108c | 4883 | #endif |
c3f6f71d | 4884 | } |
c906108c SS |
4885 | } |
4886 | return 0; | |
4887 | } | |
c906108c | 4888 | |
77382aee PA |
4889 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
4890 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
4891 | address. This function is only called if | |
4892 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
4893 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
4894 | |
4895 | static int | |
4896 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
4897 | { | |
4898 | procinfo *pi; | |
4899 | ||
dfd4cc63 | 4900 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
4901 | return proc_watchpoint_address (pi, addr); |
4902 | } | |
4903 | ||
25513619 | 4904 | static int |
0cf6dd15 TJB |
4905 | procfs_insert_watchpoint (CORE_ADDR addr, int len, int type, |
4906 | struct expression *cond) | |
25513619 | 4907 | { |
d92524f1 | 4908 | if (!target_have_steppable_watchpoint |
f5656ead | 4909 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
4910 | { |
4911 | /* When a hardware watchpoint fires off the PC will be left at | |
4912 | the instruction following the one which caused the | |
4913 | watchpoint. It will *NOT* be necessary for GDB to step over | |
4914 | the watchpoint. */ | |
4915 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
4916 | } | |
4917 | else | |
4918 | { | |
4919 | /* When a hardware watchpoint fires off the PC will be left at | |
4920 | the instruction which caused the watchpoint. It will be | |
4921 | necessary for GDB to step over the watchpoint. */ | |
4922 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
4923 | } | |
4924 | } | |
4925 | ||
4926 | static int | |
0cf6dd15 TJB |
4927 | procfs_remove_watchpoint (CORE_ADDR addr, int len, int type, |
4928 | struct expression *cond) | |
25513619 PA |
4929 | { |
4930 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
4931 | } | |
4932 | ||
4933 | static int | |
4934 | procfs_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len) | |
4935 | { | |
4936 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
4937 | system can support "thousands" of hardware watchpoints, but gives | |
4938 | no method for finding out how many; It doesn't say anything about | |
4939 | the allowed size for the watched area either. So we just tell | |
4940 | GDB 'yes'. */ | |
4941 | return 1; | |
4942 | } | |
4943 | ||
4944 | void | |
4945 | procfs_use_watchpoints (struct target_ops *t) | |
4946 | { | |
4947 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
4948 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
4949 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
4950 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 4951 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 4952 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
4953 | } |
4954 | ||
77382aee PA |
4955 | /* Memory Mappings Functions: */ |
4956 | ||
4957 | /* Call a callback function once for each mapping, passing it the | |
4958 | mapping, an optional secondary callback function, and some optional | |
4959 | opaque data. Quit and return the first non-zero value returned | |
4960 | from the callback. | |
4961 | ||
4962 | PI is the procinfo struct for the process to be mapped. FUNC is | |
4963 | the callback function to be called by this iterator. DATA is the | |
4964 | optional opaque data to be passed to the callback function. | |
4965 | CHILD_FUNC is the optional secondary function pointer to be passed | |
4966 | to the child function. Returns the first non-zero return value | |
4967 | from the callback function, or zero. */ | |
831e682e MS |
4968 | |
4969 | static int | |
b8edc417 | 4970 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 4971 | void *data, |
19958708 | 4972 | int (*func) (struct prmap *map, |
b8edc417 | 4973 | find_memory_region_ftype child_func, |
831e682e MS |
4974 | void *data)) |
4975 | { | |
4976 | char pathname[MAX_PROC_NAME_SIZE]; | |
4977 | struct prmap *prmaps; | |
4978 | struct prmap *prmap; | |
4979 | int funcstat; | |
4980 | int map_fd; | |
4981 | int nmap; | |
0a86f364 | 4982 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
4983 | #ifdef NEW_PROC_API |
4984 | struct stat sbuf; | |
4985 | #endif | |
4986 | ||
19958708 | 4987 | /* Get the number of mappings, allocate space, |
831e682e MS |
4988 | and read the mappings into prmaps. */ |
4989 | #ifdef NEW_PROC_API | |
0df8b418 | 4990 | /* Open map fd. */ |
831e682e MS |
4991 | sprintf (pathname, "/proc/%d/map", pi->pid); |
4992 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
4993 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
4994 | ||
0df8b418 | 4995 | /* Make sure it gets closed again. */ |
831e682e MS |
4996 | make_cleanup_close (map_fd); |
4997 | ||
19958708 | 4998 | /* Use stat to determine the file size, and compute |
831e682e MS |
4999 | the number of prmap_t objects it contains. */ |
5000 | if (fstat (map_fd, &sbuf) != 0) | |
5001 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
5002 | ||
5003 | nmap = sbuf.st_size / sizeof (prmap_t); | |
5004 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5005 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
5006 | != (nmap * sizeof (*prmaps))) | |
5007 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
5008 | #else | |
5009 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
5010 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
5011 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
5012 | ||
5013 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
5014 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
5015 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
5016 | #endif | |
5017 | ||
5018 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
5019 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
5020 | { |
5021 | do_cleanups (cleanups); | |
5022 | return funcstat; | |
5023 | } | |
831e682e | 5024 | |
0a86f364 | 5025 | do_cleanups (cleanups); |
831e682e MS |
5026 | return 0; |
5027 | } | |
5028 | ||
77382aee | 5029 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 5030 | function for each memory region. |
77382aee | 5031 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
5032 | |
5033 | static int | |
19958708 | 5034 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 5035 | find_memory_region_ftype func, void *data) |
be4d1333 | 5036 | { |
bf75638e | 5037 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 5038 | map->pr_size, |
be4d1333 MS |
5039 | (map->pr_mflags & MA_READ) != 0, |
5040 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 5041 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 5042 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
5043 | data); |
5044 | } | |
5045 | ||
77382aee PA |
5046 | /* External interface. Calls a callback function once for each |
5047 | mapped memory region in the child process, passing as arguments: | |
5048 | ||
5049 | CORE_ADDR virtual_address, | |
5050 | unsigned long size, | |
5051 | int read, TRUE if region is readable by the child | |
5052 | int write, TRUE if region is writable by the child | |
5053 | int execute TRUE if region is executable by the child. | |
5054 | ||
5055 | Stops iterating and returns the first non-zero value returned by | |
5056 | the callback. */ | |
be4d1333 MS |
5057 | |
5058 | static int | |
b8edc417 | 5059 | proc_find_memory_regions (find_memory_region_ftype func, void *data) |
be4d1333 | 5060 | { |
dfd4cc63 | 5061 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5062 | |
19958708 | 5063 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
5064 | find_memory_regions_callback); |
5065 | } | |
5066 | ||
77382aee | 5067 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5068 | |
388faa48 | 5069 | static char * |
5ae5f592 | 5070 | mappingflags (long flags) |
388faa48 MS |
5071 | { |
5072 | static char asciiflags[8]; | |
5073 | ||
5074 | strcpy (asciiflags, "-------"); | |
5075 | #if defined (MA_PHYS) | |
5076 | if (flags & MA_PHYS) | |
5077 | asciiflags[0] = 'd'; | |
5078 | #endif | |
5079 | if (flags & MA_STACK) | |
5080 | asciiflags[1] = 's'; | |
5081 | if (flags & MA_BREAK) | |
5082 | asciiflags[2] = 'b'; | |
5083 | if (flags & MA_SHARED) | |
5084 | asciiflags[3] = 's'; | |
5085 | if (flags & MA_READ) | |
5086 | asciiflags[4] = 'r'; | |
5087 | if (flags & MA_WRITE) | |
5088 | asciiflags[5] = 'w'; | |
5089 | if (flags & MA_EXEC) | |
5090 | asciiflags[6] = 'x'; | |
5091 | return (asciiflags); | |
5092 | } | |
5093 | ||
77382aee PA |
5094 | /* Callback function, does the actual work for 'info proc |
5095 | mappings'. */ | |
831e682e | 5096 | |
831e682e | 5097 | static int |
b8edc417 | 5098 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5099 | void *unused) |
831e682e | 5100 | { |
0b62613e | 5101 | unsigned int pr_off; |
831e682e | 5102 | |
831e682e | 5103 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5104 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5105 | #else |
0b62613e | 5106 | pr_off = map->pr_off; |
831e682e | 5107 | #endif |
0b62613e | 5108 | |
f5656ead | 5109 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 5110 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5111 | (unsigned long) map->pr_vaddr, |
5112 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5113 | (unsigned long) map->pr_size, |
0b62613e PA |
5114 | pr_off, |
5115 | mappingflags (map->pr_mflags)); | |
5116 | else | |
f6a96b83 | 5117 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5118 | (unsigned long) map->pr_vaddr, |
5119 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5120 | (unsigned long) map->pr_size, |
0b62613e PA |
5121 | pr_off, |
5122 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5123 | |
5124 | return 0; | |
5125 | } | |
5126 | ||
77382aee | 5127 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5128 | |
5129 | static void | |
5130 | info_proc_mappings (procinfo *pi, int summary) | |
5131 | { | |
388faa48 | 5132 | if (summary) |
0df8b418 | 5133 | return; /* No output for summary mode. */ |
388faa48 | 5134 | |
a3f17187 | 5135 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 5136 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
5137 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5138 | "Start Addr", | |
5139 | " End Addr", | |
5140 | " Size", | |
5141 | " Offset", | |
5142 | "Flags"); | |
5143 | else | |
5144 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5145 | "Start Addr", | |
5146 | " End Addr", | |
5147 | " Size", | |
5148 | " Offset", | |
5149 | "Flags"); | |
388faa48 | 5150 | |
831e682e | 5151 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5152 | printf_filtered ("\n"); |
5153 | } | |
5154 | ||
77382aee | 5155 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5156 | |
5157 | static void | |
145b16a9 UW |
5158 | procfs_info_proc (struct target_ops *ops, char *args, |
5159 | enum info_proc_what what) | |
c906108c | 5160 | { |
c3f6f71d | 5161 | struct cleanup *old_chain; |
388faa48 MS |
5162 | procinfo *process = NULL; |
5163 | procinfo *thread = NULL; | |
5164 | char **argv = NULL; | |
5165 | char *tmp = NULL; | |
5166 | int pid = 0; | |
5167 | int tid = 0; | |
5168 | int mappings = 0; | |
c906108c | 5169 | |
145b16a9 UW |
5170 | switch (what) |
5171 | { | |
5172 | case IP_MINIMAL: | |
5173 | break; | |
5174 | ||
5175 | case IP_MAPPINGS: | |
5176 | case IP_ALL: | |
5177 | mappings = 1; | |
5178 | break; | |
5179 | ||
5180 | default: | |
5181 | error (_("Not supported on this target.")); | |
5182 | } | |
5183 | ||
c3f6f71d JM |
5184 | old_chain = make_cleanup (null_cleanup, 0); |
5185 | if (args) | |
0fda6bd2 | 5186 | { |
d1a41061 PP |
5187 | argv = gdb_buildargv (args); |
5188 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5189 | } |
c3f6f71d JM |
5190 | while (argv != NULL && *argv != NULL) |
5191 | { | |
5192 | if (isdigit (argv[0][0])) | |
5193 | { | |
5194 | pid = strtoul (argv[0], &tmp, 10); | |
5195 | if (*tmp == '/') | |
5196 | tid = strtoul (++tmp, NULL, 10); | |
5197 | } | |
5198 | else if (argv[0][0] == '/') | |
5199 | { | |
5200 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5201 | } | |
c3f6f71d JM |
5202 | argv++; |
5203 | } | |
5204 | if (pid == 0) | |
dfd4cc63 | 5205 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 5206 | if (pid == 0) |
8a3fe4f8 | 5207 | error (_("No current process: you must name one.")); |
c3f6f71d | 5208 | else |
c906108c | 5209 | { |
c3f6f71d | 5210 | /* Have pid, will travel. |
0df8b418 | 5211 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5212 | process = find_procinfo (pid, 0); |
5213 | if (process == NULL) | |
5214 | { | |
19958708 | 5215 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5216 | remember to close it again when finished. */ |
5217 | process = create_procinfo (pid, 0); | |
004527cb | 5218 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5219 | if (!open_procinfo_files (process, FD_CTL)) |
5220 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5221 | } | |
c906108c | 5222 | } |
c3f6f71d JM |
5223 | if (tid != 0) |
5224 | thread = create_procinfo (pid, tid); | |
5225 | ||
5226 | if (process) | |
5227 | { | |
a3f17187 | 5228 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5229 | proc_prettyprint_flags (proc_flags (process), 1); |
5230 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5231 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5232 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5233 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5234 | proc_get_nthreads (process)); |
5235 | } | |
5236 | if (thread) | |
5237 | { | |
a3f17187 | 5238 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5239 | proc_prettyprint_flags (proc_flags (thread), 1); |
5240 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5241 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5242 | } | |
5243 | ||
388faa48 MS |
5244 | if (mappings) |
5245 | { | |
5246 | info_proc_mappings (process, 0); | |
5247 | } | |
5248 | ||
c3f6f71d | 5249 | do_cleanups (old_chain); |
c906108c SS |
5250 | } |
5251 | ||
9185ddce JB |
5252 | /* Modify the status of the system call identified by SYSCALLNUM in |
5253 | the set of syscalls that are currently traced/debugged. | |
5254 | ||
5255 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5256 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5257 | |
0df8b418 | 5258 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5259 | will be disabled. */ |
5260 | ||
5261 | static void | |
5262 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5263 | int mode, int from_tty) |
9185ddce JB |
5264 | { |
5265 | sysset_t *sysset; | |
77382aee | 5266 | |
9185ddce JB |
5267 | if (entry_or_exit == PR_SYSENTRY) |
5268 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5269 | else | |
5270 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5271 | ||
5272 | if (sysset == NULL) | |
5273 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5274 | ||
5275 | if (mode == FLAG_SET) | |
5276 | gdb_praddsysset (sysset, syscallnum); | |
5277 | else | |
5278 | gdb_prdelsysset (sysset, syscallnum); | |
5279 | ||
5280 | if (entry_or_exit == PR_SYSENTRY) | |
5281 | { | |
5282 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5283 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5284 | } |
5285 | else | |
5286 | { | |
5287 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5288 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5289 | } |
5290 | } | |
5291 | ||
c3f6f71d | 5292 | static void |
fba45db2 | 5293 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5294 | { |
c3f6f71d | 5295 | procinfo *pi; |
c906108c | 5296 | |
dfd4cc63 | 5297 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 5298 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5299 | |
c3f6f71d | 5300 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5301 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5302 | |
dfd4cc63 | 5303 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
5304 | if (isdigit (args[0])) |
5305 | { | |
9185ddce | 5306 | const int syscallnum = atoi (args); |
c906108c | 5307 | |
9185ddce | 5308 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5309 | } |
5310 | } | |
5311 | ||
19958708 | 5312 | static void |
fba45db2 | 5313 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5314 | { |
c3f6f71d JM |
5315 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5316 | } | |
c906108c | 5317 | |
19958708 | 5318 | static void |
fba45db2 | 5319 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5320 | { |
5321 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5322 | } |
c906108c | 5323 | |
19958708 | 5324 | static void |
fba45db2 | 5325 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5326 | { |
5327 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5328 | } | |
5329 | ||
19958708 | 5330 | static void |
fba45db2 | 5331 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5332 | { |
c3f6f71d JM |
5333 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5334 | } | |
c906108c | 5335 | |
c906108c | 5336 | |
a0911fd0 MR |
5337 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5338 | extern void _initialize_procfs (void); | |
5339 | ||
c906108c | 5340 | void |
fba45db2 | 5341 | _initialize_procfs (void) |
c906108c | 5342 | { |
27087a3d JB |
5343 | observer_attach_inferior_created (procfs_inferior_created); |
5344 | ||
19958708 | 5345 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5346 | _("Give a trace of entries into the syscall.")); |
19958708 | 5347 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5348 | _("Give a trace of exits from the syscall.")); |
19958708 | 5349 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5350 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5351 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5352 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5353 | } |
5354 | ||
5355 | /* =================== END, GDB "MODULE" =================== */ | |
5356 | ||
5357 | ||
5358 | ||
77382aee PA |
5359 | /* miscellaneous stubs: */ |
5360 | ||
5361 | /* The following satisfy a few random symbols mostly created by the | |
5362 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5363 | |
77382aee PA |
5364 | /* Return a pid for which we guarantee we will be able to find a |
5365 | 'live' procinfo. */ | |
c3f6f71d | 5366 | |
39f77062 | 5367 | ptid_t |
fba45db2 | 5368 | procfs_first_available (void) |
c3f6f71d | 5369 | { |
39f77062 | 5370 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5371 | } |
be4d1333 MS |
5372 | |
5373 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
05b4bd79 PA |
5374 | #if defined (PIOCOPENLWP) || defined (PCAGENT) |
5375 | /* gcore only implemented on solaris (so far) */ | |
be4d1333 MS |
5376 | |
5377 | static char * | |
19958708 | 5378 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 5379 | char *note_data, int *note_size, |
2ea28649 | 5380 | enum gdb_signal stop_signal) |
be4d1333 | 5381 | { |
594f7785 | 5382 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5383 | gdb_gregset_t gregs; |
5384 | gdb_fpregset_t fpregs; | |
5385 | unsigned long merged_pid; | |
75125405 | 5386 | struct cleanup *old_chain; |
be4d1333 | 5387 | |
dfd4cc63 | 5388 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 5389 | |
75125405 DJ |
5390 | /* This part is the old method for fetching registers. |
5391 | It should be replaced by the newer one using regsets | |
5392 | once it is implemented in this platform: | |
0df8b418 | 5393 | gdbarch_regset_from_core_section() and regset->collect_regset(). */ |
75125405 DJ |
5394 | |
5395 | old_chain = save_inferior_ptid (); | |
5396 | inferior_ptid = ptid; | |
5397 | target_fetch_registers (regcache, -1); | |
5398 | ||
594f7785 | 5399 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5400 | #if defined (NEW_PROC_API) |
65554fef MS |
5401 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5402 | note_data, | |
5403 | note_size, | |
19958708 | 5404 | merged_pid, |
65554fef MS |
5405 | stop_signal, |
5406 | &gregs); | |
5407 | #else | |
be4d1333 | 5408 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5409 | note_data, |
5410 | note_size, | |
19958708 | 5411 | merged_pid, |
be4d1333 | 5412 | stop_signal, |
65554fef MS |
5413 | &gregs); |
5414 | #endif | |
594f7785 | 5415 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5416 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5417 | note_data, | |
5418 | note_size, | |
5419 | &fpregs, | |
5420 | sizeof (fpregs)); | |
75125405 DJ |
5421 | |
5422 | do_cleanups (old_chain); | |
5423 | ||
be4d1333 MS |
5424 | return note_data; |
5425 | } | |
5426 | ||
5427 | struct procfs_corefile_thread_data { | |
5428 | bfd *obfd; | |
5429 | char *note_data; | |
5430 | int *note_size; | |
2ea28649 | 5431 | enum gdb_signal stop_signal; |
be4d1333 MS |
5432 | }; |
5433 | ||
5434 | static int | |
65554fef | 5435 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5436 | { |
5437 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5438 | |
2689673f | 5439 | if (pi != NULL) |
be4d1333 | 5440 | { |
dfd4cc63 | 5441 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 5442 | |
75125405 | 5443 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5444 | args->note_data, |
2020b7ab PA |
5445 | args->note_size, |
5446 | args->stop_signal); | |
be4d1333 MS |
5447 | } |
5448 | return 0; | |
5449 | } | |
5450 | ||
a223f1e7 JB |
5451 | static int |
5452 | find_signalled_thread (struct thread_info *info, void *data) | |
5453 | { | |
a493e3e2 | 5454 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
5455 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5456 | return 1; | |
5457 | ||
5458 | return 0; | |
5459 | } | |
5460 | ||
2ea28649 | 5461 | static enum gdb_signal |
a223f1e7 JB |
5462 | find_stop_signal (void) |
5463 | { | |
5464 | struct thread_info *info = | |
5465 | iterate_over_threads (find_signalled_thread, NULL); | |
5466 | ||
5467 | if (info) | |
16c381f0 | 5468 | return info->suspend.stop_signal; |
a223f1e7 | 5469 | else |
a493e3e2 | 5470 | return GDB_SIGNAL_0; |
a223f1e7 JB |
5471 | } |
5472 | ||
be4d1333 MS |
5473 | static char * |
5474 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5475 | { | |
5476 | struct cleanup *old_chain; | |
5477 | gdb_gregset_t gregs; | |
5478 | gdb_fpregset_t fpregs; | |
5479 | char fname[16] = {'\0'}; | |
5480 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 5481 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5482 | char *note_data = NULL; |
6dbdc4a3 | 5483 | char *inf_args; |
be4d1333 | 5484 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5485 | gdb_byte *auxv; |
4e73f23d | 5486 | int auxv_len; |
2ea28649 | 5487 | enum gdb_signal stop_signal; |
be4d1333 MS |
5488 | |
5489 | if (get_exec_file (0)) | |
5490 | { | |
9f37bbcc | 5491 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5492 | fname[sizeof (fname) - 1] = 0; |
5493 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5494 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5495 | |
5496 | inf_args = get_inferior_args (); | |
5497 | if (inf_args && *inf_args && | |
5498 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5499 | { |
19958708 | 5500 | strncat (psargs, " ", |
be4d1333 | 5501 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5502 | strncat (psargs, inf_args, |
be4d1333 MS |
5503 | sizeof (psargs) - strlen (psargs)); |
5504 | } | |
5505 | } | |
5506 | ||
19958708 RM |
5507 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5508 | note_data, | |
5509 | note_size, | |
5510 | fname, | |
be4d1333 MS |
5511 | psargs); |
5512 | ||
651c8d2d PA |
5513 | stop_signal = find_stop_signal (); |
5514 | ||
3e3420f6 PA |
5515 | #ifdef NEW_PROC_API |
5516 | fill_gregset (get_current_regcache (), &gregs, -1); | |
5517 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 5518 | ptid_get_pid (inferior_ptid), |
3e3420f6 PA |
5519 | stop_signal, &gregs); |
5520 | #endif | |
5521 | ||
be4d1333 MS |
5522 | thread_args.obfd = obfd; |
5523 | thread_args.note_data = note_data; | |
5524 | thread_args.note_size = note_size; | |
651c8d2d | 5525 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5526 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5527 | &thread_args); | |
65554fef | 5528 | |
2689673f PA |
5529 | /* There should be always at least one thread. */ |
5530 | gdb_assert (thread_args.note_data != note_data); | |
5531 | note_data = thread_args.note_data; | |
be4d1333 | 5532 | |
13547ab6 DJ |
5533 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5534 | NULL, &auxv); | |
4e73f23d RM |
5535 | if (auxv_len > 0) |
5536 | { | |
5537 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5538 | "CORE", NT_AUXV, auxv, auxv_len); | |
5539 | xfree (auxv); | |
5540 | } | |
5541 | ||
be4d1333 MS |
5542 | make_cleanup (xfree, note_data); |
5543 | return note_data; | |
5544 | } | |
05b4bd79 | 5545 | #else /* !Solaris */ |
65554fef MS |
5546 | static char * |
5547 | procfs_make_note_section (bfd *obfd, int *note_size) | |
5548 | { | |
8a3fe4f8 | 5549 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5550 | return NULL; /* lint */ |
5551 | } | |
05b4bd79 | 5552 | #endif /* Solaris */ |
be4d1333 | 5553 | /* =================== END GCORE .NOTE "MODULE" =================== */ |