2 * Server-side ptrace support
4 * Copyright (C) 1999 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
30 #include <sys/types.h>
31 #ifdef HAVE_SYS_PTRACE_H
32 # include <sys/ptrace.h>
34 #ifdef HAVE_SYS_PARAM_H
35 # include <sys/param.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 # include <sys/ucontext.h>
47 #define WIN32_NO_STATUS
57 #define PTRACE_CONT PT_CONTINUE
59 #ifndef PTRACE_SINGLESTEP
60 #define PTRACE_SINGLESTEP PT_STEP
63 #define PTRACE_ATTACH PT_ATTACH
66 #define PTRACE_DETACH PT_DETACH
68 #ifndef PTRACE_PEEKDATA
69 #define PTRACE_PEEKDATA PT_READ_D
71 #ifndef PTRACE_POKEDATA
72 #define PTRACE_POKEDATA PT_WRITE_D
74 #ifndef PTRACE_PEEKUSER
75 #define PTRACE_PEEKUSER PT_READ_U
77 #ifndef PTRACE_POKEUSER
78 #define PTRACE_POKEUSER PT_WRITE_U
82 #define PTRACE_GETDBREGS PT_GETDBREGS
85 #define PTRACE_SETDBREGS PT_SETDBREGS
88 #ifndef HAVE_SYS_PTRACE_H
95 static inline int ptrace(int req
, ...) { errno
= EPERM
; return -1; /*FAIL*/ }
96 #endif /* HAVE_SYS_PTRACE_H */
98 /* handle a status returned by wait4 */
99 static int handle_child_status( struct thread
*thread
, int pid
, int status
, int want_sig
)
101 if (WIFSTOPPED(status
))
103 int sig
= WSTOPSIG(status
);
104 if (debug_level
&& thread
)
105 fprintf( stderr
, "%04x: *signal* signal=%d\n", thread
->id
, sig
);
108 /* ignore other signals for now */
109 ptrace( PTRACE_CONT
, pid
, (caddr_t
)1, sig
);
113 if (thread
&& (WIFSIGNALED(status
) || WIFEXITED(status
)))
115 thread
->unix_pid
= -1;
116 thread
->unix_tid
= -1;
119 if (WIFSIGNALED(status
))
120 fprintf( stderr
, "%04x: *exited* signal=%d\n",
121 thread
->id
, WTERMSIG(status
) );
123 fprintf( stderr
, "%04x: *exited* status=%d\n",
124 thread
->id
, WEXITSTATUS(status
) );
130 /* wait4 wrapper to handle missing __WALL flag in older kernels */
131 static inline pid_t
wait4_wrapper( pid_t pid
, int *status
, int options
, struct rusage
*usage
)
134 static int wall_flag
= __WALL
;
138 pid_t ret
= wait4( pid
, status
, options
| wall_flag
, usage
);
139 if (ret
!= -1 || !wall_flag
|| errno
!= EINVAL
) return ret
;
143 return wait4( pid
, status
, options
, usage
);
147 /* handle a SIGCHLD signal */
148 void sigchld_callback(void)
154 if (!(pid
= wait4_wrapper( -1, &status
, WUNTRACED
| WNOHANG
, NULL
))) break;
157 struct thread
*thread
= get_thread_from_tid( pid
);
158 if (!thread
) thread
= get_thread_from_pid( pid
);
159 handle_child_status( thread
, pid
, status
, -1 );
165 /* return the Unix pid to use in ptrace calls for a given process */
166 static int get_ptrace_pid( struct thread
*thread
)
168 #ifdef linux /* linux always uses thread id */
169 if (thread
->unix_tid
!= -1) return thread
->unix_tid
;
171 return thread
->unix_pid
;
174 /* return the Unix tid to use in ptrace calls for a given thread */
175 static int get_ptrace_tid( struct thread
*thread
)
177 if (thread
->unix_tid
!= -1) return thread
->unix_tid
;
178 return thread
->unix_pid
;
181 /* wait for a ptraced child to get a certain signal */
182 static int wait4_thread( struct thread
*thread
, int signal
)
189 if ((res
= wait4_wrapper( get_ptrace_pid(thread
), &status
, WUNTRACED
, NULL
)) == -1)
193 if (!watchdog_triggered()) continue;
194 if (debug_level
) fprintf( stderr
, "%04x: *watchdog* wait4 aborted\n", thread
->id
);
196 else if (errno
== ECHILD
) /* must have died */
198 thread
->unix_pid
= -1;
199 thread
->unix_tid
= -1;
201 else perror( "wait4" );
205 res
= handle_child_status( thread
, res
, status
, signal
);
206 if (!res
|| res
== signal
) break;
209 return (thread
->unix_pid
!= -1);
212 /* send a signal to a specific thread */
213 static inline int tkill( int tgid
, int pid
, int sig
)
218 ret
= syscall(270 /*SYS_tgkill*/, tgid
, pid
, sig
);
219 if (ret
< 0 && errno
== -ENOSYS
)
220 ret
= syscall(238 /*SYS_tkill*/, pid
, sig
);
222 # elif defined(__x86_64__)
223 return syscall(200 /*SYS_tkill*/, pid
, sig
);
225 if (ret
>= 0) return ret
;
228 #elif defined(__FreeBSD__) && defined(HAVE_THR_KILL2)
229 return thr_kill2( tgid
, pid
, sig
);
236 /* initialize the process tracing mechanism */
237 void init_tracing_mechanism(void)
239 /* no initialization needed for ptrace */
242 /* initialize the per-process tracing mechanism */
243 void init_process_tracing( struct process
*process
)
245 /* ptrace setup is done on-demand */
248 /* terminate the per-process tracing mechanism */
249 void finish_process_tracing( struct process
*process
)
253 /* send a Unix signal to a specific thread */
254 int send_thread_signal( struct thread
*thread
, int sig
)
258 if (thread
->unix_pid
!= -1)
260 if (thread
->unix_tid
!= -1)
262 ret
= tkill( thread
->unix_pid
, thread
->unix_tid
, sig
);
263 if (ret
== -1 && errno
== ENOSYS
) ret
= kill( thread
->unix_pid
, sig
);
265 else ret
= kill( thread
->unix_pid
, sig
);
267 if (ret
== -1 && errno
== ESRCH
) /* thread got killed */
269 thread
->unix_pid
= -1;
270 thread
->unix_tid
= -1;
273 if (debug_level
&& ret
!= -1)
274 fprintf( stderr
, "%04x: *sent signal* signal=%d\n", thread
->id
, sig
);
278 /* resume a thread after we have used ptrace on it */
279 static void resume_after_ptrace( struct thread
*thread
)
281 if (thread
->unix_pid
== -1) return;
282 if (ptrace( PTRACE_DETACH
, get_ptrace_pid(thread
), (caddr_t
)1, 0 ) == -1)
284 if (errno
== ESRCH
) thread
->unix_pid
= thread
->unix_tid
= -1; /* thread got killed */
288 /* suspend a thread to allow using ptrace on it */
289 /* you must do a resume_after_ptrace when finished with the thread */
290 static int suspend_for_ptrace( struct thread
*thread
)
292 /* can't stop a thread while initialisation is in progress */
293 if (thread
->unix_pid
== -1 || !is_process_init_done(thread
->process
)) goto error
;
295 /* this may fail if the client is already being debugged */
296 if (ptrace( PTRACE_ATTACH
, get_ptrace_pid(thread
), 0, 0 ) == -1)
298 if (errno
== ESRCH
) thread
->unix_pid
= thread
->unix_tid
= -1; /* thread got killed */
301 if (wait4_thread( thread
, SIGSTOP
)) return 1;
302 resume_after_ptrace( thread
);
304 set_error( STATUS_ACCESS_DENIED
);
308 /* read a long from a thread address space */
309 static long read_thread_long( struct thread
*thread
, long *addr
, long *data
)
312 *data
= ptrace( PTRACE_PEEKDATA
, get_ptrace_pid(thread
), (caddr_t
)addr
, 0 );
313 if ( *data
== -1 && errno
)
321 /* write a long to a thread address space */
322 static long write_thread_long( struct thread
*thread
, long *addr
, long data
, unsigned long mask
)
327 if (read_thread_long( thread
, addr
, &res
) == -1) return -1;
328 data
= (data
& mask
) | (res
& ~mask
);
330 if ((res
= ptrace( PTRACE_POKEDATA
, get_ptrace_pid(thread
), (caddr_t
)addr
, data
)) == -1)
335 /* return a thread of the process suitable for ptracing */
336 static struct thread
*get_ptrace_thread( struct process
*process
)
338 struct thread
*thread
;
340 LIST_FOR_EACH_ENTRY( thread
, &process
->thread_list
, struct thread
, proc_entry
)
342 if (thread
->unix_pid
!= -1) return thread
;
344 set_error( STATUS_ACCESS_DENIED
); /* process is dead */
348 /* read data from a process memory space */
349 int read_process_memory( struct process
*process
, client_ptr_t ptr
, data_size_t size
, char *dest
)
351 struct thread
*thread
= get_ptrace_thread( process
);
352 unsigned int first_offset
, last_offset
, len
;
355 if (!thread
) return 0;
357 if ((unsigned long)ptr
!= ptr
)
359 set_error( STATUS_ACCESS_DENIED
);
363 first_offset
= ptr
% sizeof(long);
364 last_offset
= (size
+ first_offset
) % sizeof(long);
365 if (!last_offset
) last_offset
= sizeof(long);
367 addr
= (long *)(unsigned long)(ptr
- first_offset
);
368 len
= (size
+ first_offset
+ sizeof(long) - 1) / sizeof(long);
370 if (suspend_for_ptrace( thread
))
372 if (len
> 3) /* /proc/pid/mem should be faster for large sizes */
377 sprintf( procmem
, "/proc/%u/mem", process
->unix_pid
);
378 if ((fd
= open( procmem
, O_RDONLY
)) != -1)
380 ssize_t ret
= pread( fd
, dest
, size
, ptr
);
392 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
393 memcpy( dest
, (char *)&data
+ first_offset
, sizeof(long) - first_offset
);
394 dest
+= sizeof(long) - first_offset
;
401 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
402 memcpy( dest
, &data
, sizeof(long) );
403 dest
+= sizeof(long);
407 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
408 memcpy( dest
, (char *)&data
+ first_offset
, last_offset
- first_offset
);
412 resume_after_ptrace( thread
);
417 /* make sure we can write to the whole address range */
418 /* len is the total size (in ints) */
419 static int check_process_write_access( struct thread
*thread
, long *addr
, data_size_t len
)
421 int page
= get_page_size() / sizeof(int);
425 if (write_thread_long( thread
, addr
, 0, 0 ) == -1) return 0;
426 if (len
<= page
) break;
430 return (write_thread_long( thread
, addr
+ len
- 1, 0, 0 ) != -1);
433 /* write data to a process memory space */
434 int write_process_memory( struct process
*process
, client_ptr_t ptr
, data_size_t size
, const char *src
)
436 struct thread
*thread
= get_ptrace_thread( process
);
441 unsigned long first_mask
, first_offset
, last_mask
, last_offset
;
443 if (!thread
) return 0;
445 if ((unsigned long)ptr
!= ptr
)
447 set_error( STATUS_ACCESS_DENIED
);
451 /* compute the mask for the first long */
453 first_offset
= ptr
% sizeof(long);
454 memset( &first_mask
, 0, first_offset
);
456 /* compute the mask for the last long */
457 last_offset
= (size
+ first_offset
) % sizeof(long);
458 if (!last_offset
) last_offset
= sizeof(long);
460 memset( &last_mask
, 0xff, last_offset
);
462 addr
= (long *)(unsigned long)(ptr
- first_offset
);
463 len
= (size
+ first_offset
+ sizeof(long) - 1) / sizeof(long);
465 if (suspend_for_ptrace( thread
))
467 if (!check_process_write_access( thread
, addr
, len
))
469 set_error( STATUS_ACCESS_DENIED
);
472 /* first word is special */
475 memcpy( (char *)&data
+ first_offset
, src
, sizeof(long) - first_offset
);
476 src
+= sizeof(long) - first_offset
;
477 if (write_thread_long( thread
, addr
++, data
, first_mask
) == -1) goto done
;
481 else last_mask
&= first_mask
;
485 memcpy( &data
, src
, sizeof(long) );
487 if (write_thread_long( thread
, addr
++, data
, ~0ul ) == -1) goto done
;
491 /* last word is special too */
492 memcpy( (char *)&data
+ first_offset
, src
, last_offset
- first_offset
);
493 if (write_thread_long( thread
, addr
, data
, last_mask
) == -1) goto done
;
497 resume_after_ptrace( thread
);
502 /* retrieve an LDT selector entry */
503 void get_selector_entry( struct thread
*thread
, int entry
, unsigned int *base
,
504 unsigned int *limit
, unsigned char *flags
)
506 if (!thread
->process
->ldt_copy
)
508 set_error( STATUS_ACCESS_DENIED
);
513 set_error( STATUS_ACCESS_VIOLATION
);
516 if (suspend_for_ptrace( thread
))
518 unsigned char flags_buf
[sizeof(long)];
519 long *addr
= (long *)(unsigned long)thread
->process
->ldt_copy
+ entry
;
520 if (read_thread_long( thread
, addr
, (long *)base
) == -1) goto done
;
521 if (read_thread_long( thread
, addr
+ 8192, (long *)limit
) == -1) goto done
;
522 addr
= (long *)(unsigned long)thread
->process
->ldt_copy
+ 2*8192 + (entry
/ sizeof(long));
523 if (read_thread_long( thread
, addr
, (long *)flags_buf
) == -1) goto done
;
524 *flags
= flags_buf
[entry
% sizeof(long)];
526 resume_after_ptrace( thread
);
531 #if defined(linux) && (defined(__i386__) || defined(__x86_64__))
533 #ifdef HAVE_SYS_USER_H
534 # include <sys/user.h>
537 /* debug register offset in struct user */
538 #define DR_OFFSET(dr) ((((struct user *)0)->u_debugreg) + (dr))
540 /* retrieve the thread x86 registers */
541 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
543 int i
, pid
= get_ptrace_tid(thread
);
546 /* all other regs are handled on the client side */
547 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
549 if (!suspend_for_ptrace( thread
)) return;
551 for (i
= 0; i
< 8; i
++)
553 if (i
== 4 || i
== 5) continue;
555 data
[i
] = ptrace( PTRACE_PEEKUSER
, pid
, DR_OFFSET(i
), 0 );
556 if ((data
[i
] == -1) && errno
)
562 switch (context
->cpu
)
565 context
->debug
.i386_regs
.dr0
= data
[0];
566 context
->debug
.i386_regs
.dr1
= data
[1];
567 context
->debug
.i386_regs
.dr2
= data
[2];
568 context
->debug
.i386_regs
.dr3
= data
[3];
569 context
->debug
.i386_regs
.dr6
= data
[6];
570 context
->debug
.i386_regs
.dr7
= data
[7];
573 context
->debug
.x86_64_regs
.dr0
= data
[0];
574 context
->debug
.x86_64_regs
.dr1
= data
[1];
575 context
->debug
.x86_64_regs
.dr2
= data
[2];
576 context
->debug
.x86_64_regs
.dr3
= data
[3];
577 context
->debug
.x86_64_regs
.dr6
= data
[6];
578 context
->debug
.x86_64_regs
.dr7
= data
[7];
581 set_error( STATUS_INVALID_PARAMETER
);
584 context
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
586 resume_after_ptrace( thread
);
589 /* set the thread x86 registers */
590 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
592 int pid
= get_ptrace_tid( thread
);
594 /* all other regs are handled on the client side */
595 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
597 if (!suspend_for_ptrace( thread
)) return;
599 switch (context
->cpu
)
602 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(0), context
->debug
.i386_regs
.dr0
) == -1) goto error
;
603 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr0
= context
->debug
.i386_regs
.dr0
;
604 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(1), context
->debug
.i386_regs
.dr1
) == -1) goto error
;
605 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr1
= context
->debug
.i386_regs
.dr1
;
606 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(2), context
->debug
.i386_regs
.dr2
) == -1) goto error
;
607 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr2
= context
->debug
.i386_regs
.dr2
;
608 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(3), context
->debug
.i386_regs
.dr3
) == -1) goto error
;
609 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr3
= context
->debug
.i386_regs
.dr3
;
610 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(6), context
->debug
.i386_regs
.dr6
) == -1) goto error
;
611 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr6
= context
->debug
.i386_regs
.dr6
;
612 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.i386_regs
.dr7
) == -1) goto error
;
613 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr7
= context
->debug
.i386_regs
.dr7
;
616 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(0), context
->debug
.x86_64_regs
.dr0
) == -1) goto error
;
617 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr0
= context
->debug
.x86_64_regs
.dr0
;
618 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(1), context
->debug
.x86_64_regs
.dr1
) == -1) goto error
;
619 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr1
= context
->debug
.x86_64_regs
.dr1
;
620 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(2), context
->debug
.x86_64_regs
.dr2
) == -1) goto error
;
621 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr2
= context
->debug
.x86_64_regs
.dr2
;
622 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(3), context
->debug
.x86_64_regs
.dr3
) == -1) goto error
;
623 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr3
= context
->debug
.x86_64_regs
.dr3
;
624 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(6), context
->debug
.x86_64_regs
.dr6
) == -1) goto error
;
625 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr6
= context
->debug
.x86_64_regs
.dr6
;
626 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.x86_64_regs
.dr7
) == -1) goto error
;
627 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr7
= context
->debug
.x86_64_regs
.dr7
;
630 set_error( STATUS_INVALID_PARAMETER
);
632 resume_after_ptrace( thread
);
636 resume_after_ptrace( thread
);
639 #elif defined(__i386__) && defined(PTRACE_GETDBREGS) && defined(PTRACE_SETDBREGS) && \
640 (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__NetBSD__))
642 #include <machine/reg.h>
644 /* retrieve the thread x86 registers */
645 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
647 int pid
= get_ptrace_tid(thread
);
650 /* all other regs are handled on the client side */
651 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
653 if (!suspend_for_ptrace( thread
)) return;
655 if (ptrace( PTRACE_GETDBREGS
, pid
, (caddr_t
) &dbregs
, 0 ) == -1) file_set_error();
659 /* needed for FreeBSD, the structure fields have changed under 5.x */
660 context
->debug
.i386_regs
.dr0
= DBREG_DRX((&dbregs
), 0);
661 context
->debug
.i386_regs
.dr1
= DBREG_DRX((&dbregs
), 1);
662 context
->debug
.i386_regs
.dr2
= DBREG_DRX((&dbregs
), 2);
663 context
->debug
.i386_regs
.dr3
= DBREG_DRX((&dbregs
), 3);
664 context
->debug
.i386_regs
.dr6
= DBREG_DRX((&dbregs
), 6);
665 context
->debug
.i386_regs
.dr7
= DBREG_DRX((&dbregs
), 7);
667 context
->debug
.i386_regs
.dr0
= dbregs
.dr0
;
668 context
->debug
.i386_regs
.dr1
= dbregs
.dr1
;
669 context
->debug
.i386_regs
.dr2
= dbregs
.dr2
;
670 context
->debug
.i386_regs
.dr3
= dbregs
.dr3
;
671 context
->debug
.i386_regs
.dr6
= dbregs
.dr6
;
672 context
->debug
.i386_regs
.dr7
= dbregs
.dr7
;
674 context
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
676 resume_after_ptrace( thread
);
679 /* set the thread x86 registers */
680 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
682 int pid
= get_ptrace_tid(thread
);
685 /* all other regs are handled on the client side */
686 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
688 if (!suspend_for_ptrace( thread
)) return;
691 /* needed for FreeBSD, the structure fields have changed under 5.x */
692 DBREG_DRX((&dbregs
), 0) = context
->debug
.i386_regs
.dr0
;
693 DBREG_DRX((&dbregs
), 1) = context
->debug
.i386_regs
.dr1
;
694 DBREG_DRX((&dbregs
), 2) = context
->debug
.i386_regs
.dr2
;
695 DBREG_DRX((&dbregs
), 3) = context
->debug
.i386_regs
.dr3
;
696 DBREG_DRX((&dbregs
), 4) = 0;
697 DBREG_DRX((&dbregs
), 5) = 0;
698 DBREG_DRX((&dbregs
), 6) = context
->debug
.i386_regs
.dr6
;
699 DBREG_DRX((&dbregs
), 7) = context
->debug
.i386_regs
.dr7
;
701 dbregs
.dr0
= context
->debug
.i386_regs
.dr0
;
702 dbregs
.dr1
= context
->debug
.i386_regs
.dr1
;
703 dbregs
.dr2
= context
->debug
.i386_regs
.dr2
;
704 dbregs
.dr3
= context
->debug
.i386_regs
.dr3
;
707 dbregs
.dr6
= context
->debug
.i386_regs
.dr6
;
708 dbregs
.dr7
= context
->debug
.i386_regs
.dr7
;
710 if (ptrace( PTRACE_SETDBREGS
, pid
, (caddr_t
) &dbregs
, 0 ) == -1) file_set_error();
711 else if (thread
->context
)
712 thread
->context
->debug
.i386_regs
= context
->debug
.i386_regs
; /* update the cached values */
713 resume_after_ptrace( thread
);
716 #else /* linux || __FreeBSD__ */
718 /* retrieve the thread x86 registers */
719 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
723 /* set the thread x86 debug registers */
724 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
728 #endif /* linux || __FreeBSD__ */
730 #endif /* USE_PTRACE */