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>
40 #ifdef HAVE_SYS_SYSCALL_H
41 # include <sys/syscall.h>
44 # include <sys/ucontext.h>
50 #define WIN32_NO_STATUS
60 #define PTRACE_CONT PT_CONTINUE
62 #ifndef PTRACE_SINGLESTEP
63 #define PTRACE_SINGLESTEP PT_STEP
66 #define PTRACE_ATTACH PT_ATTACH
69 #define PTRACE_DETACH PT_DETACH
71 #ifndef PTRACE_PEEKDATA
72 #define PTRACE_PEEKDATA PT_READ_D
74 #ifndef PTRACE_POKEDATA
75 #define PTRACE_POKEDATA PT_WRITE_D
77 #ifndef PTRACE_PEEKUSER
78 #define PTRACE_PEEKUSER PT_READ_U
80 #ifndef PTRACE_POKEUSER
81 #define PTRACE_POKEUSER PT_WRITE_U
85 #define PTRACE_GETDBREGS PT_GETDBREGS
88 #define PTRACE_SETDBREGS PT_SETDBREGS
91 #ifndef HAVE_SYS_PTRACE_H
98 static inline int ptrace(int req
, ...) { errno
= EPERM
; return -1; /*FAIL*/ }
99 #endif /* HAVE_SYS_PTRACE_H */
105 /* handle a status returned by waitpid */
106 static int handle_child_status( struct thread
*thread
, int pid
, int status
, int want_sig
)
108 if (WIFSTOPPED(status
))
110 int sig
= WSTOPSIG(status
);
111 if (debug_level
&& thread
)
112 fprintf( stderr
, "%04x: *signal* signal=%d\n", thread
->id
, sig
);
115 /* ignore other signals for now */
116 ptrace( PTRACE_CONT
, pid
, (caddr_t
)1, sig
);
120 if (thread
&& (WIFSIGNALED(status
) || WIFEXITED(status
)))
122 thread
->unix_pid
= -1;
123 thread
->unix_tid
= -1;
126 if (WIFSIGNALED(status
))
127 fprintf( stderr
, "%04x: *exited* signal=%d\n",
128 thread
->id
, WTERMSIG(status
) );
130 fprintf( stderr
, "%04x: *exited* status=%d\n",
131 thread
->id
, WEXITSTATUS(status
) );
137 /* handle a SIGCHLD signal */
138 void sigchld_callback(void)
144 if (!(pid
= waitpid( -1, &status
, WUNTRACED
| WNOHANG
| __WALL
))) break;
147 struct thread
*thread
= get_thread_from_tid( pid
);
148 if (!thread
) thread
= get_thread_from_pid( pid
);
149 handle_child_status( thread
, pid
, status
, -1 );
155 /* return the Unix pid to use in ptrace calls for a given process */
156 static int get_ptrace_pid( struct thread
*thread
)
158 #ifdef linux /* linux always uses thread id */
159 if (thread
->unix_tid
!= -1) return thread
->unix_tid
;
161 return thread
->unix_pid
;
164 /* return the Unix tid to use in ptrace calls for a given thread */
165 static int get_ptrace_tid( struct thread
*thread
)
167 if (thread
->unix_tid
!= -1) return thread
->unix_tid
;
168 return thread
->unix_pid
;
171 /* wait for a ptraced child to get a certain signal */
172 static int waitpid_thread( struct thread
*thread
, int signal
)
179 if ((res
= waitpid( get_ptrace_pid(thread
), &status
, WUNTRACED
| __WALL
)) == -1)
183 if (!watchdog_triggered()) continue;
184 if (debug_level
) fprintf( stderr
, "%04x: *watchdog* waitpid aborted\n", thread
->id
);
186 else if (errno
== ECHILD
) /* must have died */
188 thread
->unix_pid
= -1;
189 thread
->unix_tid
= -1;
191 else perror( "waitpid" );
195 res
= handle_child_status( thread
, res
, status
, signal
);
196 if (!res
|| res
== signal
) break;
199 return (thread
->unix_pid
!= -1);
202 /* send a signal to a specific thread */
203 static inline int tkill( int tgid
, int pid
, int sig
)
206 int ret
= syscall( __NR_tgkill
, tgid
, pid
, sig
);
207 if (ret
< 0 && errno
== ENOSYS
) ret
= syscall( __NR_tkill
, pid
, sig
);
209 #elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__)) && defined(HAVE_THR_KILL2)
210 return thr_kill2( tgid
, pid
, sig
);
217 /* initialize the process tracing mechanism */
218 void init_tracing_mechanism(void)
220 /* no initialization needed for ptrace */
223 /* initialize the per-process tracing mechanism */
224 void init_process_tracing( struct process
*process
)
226 /* ptrace setup is done on-demand */
229 /* terminate the per-process tracing mechanism */
230 void finish_process_tracing( struct process
*process
)
234 /* send a Unix signal to a specific thread */
235 int send_thread_signal( struct thread
*thread
, int sig
)
239 if (thread
->unix_pid
!= -1)
241 if (thread
->unix_tid
!= -1)
243 ret
= tkill( thread
->unix_pid
, thread
->unix_tid
, sig
);
244 if (ret
== -1 && errno
== ENOSYS
) ret
= kill( thread
->unix_pid
, sig
);
246 else ret
= kill( thread
->unix_pid
, sig
);
248 if (ret
== -1 && errno
== ESRCH
) /* thread got killed */
250 thread
->unix_pid
= -1;
251 thread
->unix_tid
= -1;
254 if (debug_level
&& ret
!= -1)
255 fprintf( stderr
, "%04x: *sent signal* signal=%d\n", thread
->id
, sig
);
259 /* resume a thread after we have used ptrace on it */
260 static void resume_after_ptrace( struct thread
*thread
)
262 if (thread
->unix_pid
== -1) return;
263 if (ptrace( PTRACE_DETACH
, get_ptrace_pid(thread
), (caddr_t
)1, 0 ) == -1)
265 if (errno
== ESRCH
) thread
->unix_pid
= thread
->unix_tid
= -1; /* thread got killed */
269 /* suspend a thread to allow using ptrace on it */
270 /* you must do a resume_after_ptrace when finished with the thread */
271 static int suspend_for_ptrace( struct thread
*thread
)
273 /* can't stop a thread while initialisation is in progress */
274 if (thread
->unix_pid
== -1 || !is_process_init_done(thread
->process
)) goto error
;
276 /* this may fail if the client is already being debugged */
277 if (ptrace( PTRACE_ATTACH
, get_ptrace_pid(thread
), 0, 0 ) == -1)
279 if (errno
== ESRCH
) thread
->unix_pid
= thread
->unix_tid
= -1; /* thread got killed */
282 if (waitpid_thread( thread
, SIGSTOP
)) return 1;
283 resume_after_ptrace( thread
);
285 set_error( STATUS_ACCESS_DENIED
);
289 /* read a long from a thread address space */
290 static long read_thread_long( struct thread
*thread
, long *addr
, long *data
)
293 *data
= ptrace( PTRACE_PEEKDATA
, get_ptrace_pid(thread
), (caddr_t
)addr
, 0 );
294 if ( *data
== -1 && errno
)
302 /* write a long to a thread address space */
303 static long write_thread_long( struct thread
*thread
, long *addr
, long data
, unsigned long mask
)
308 if (read_thread_long( thread
, addr
, &res
) == -1) return -1;
309 data
= (data
& mask
) | (res
& ~mask
);
311 if ((res
= ptrace( PTRACE_POKEDATA
, get_ptrace_pid(thread
), (caddr_t
)addr
, data
)) == -1)
316 /* return a thread of the process suitable for ptracing */
317 static struct thread
*get_ptrace_thread( struct process
*process
)
319 struct thread
*thread
;
321 LIST_FOR_EACH_ENTRY( thread
, &process
->thread_list
, struct thread
, proc_entry
)
323 if (thread
->unix_pid
!= -1) return thread
;
325 set_error( STATUS_ACCESS_DENIED
); /* process is dead */
329 /* read data from a process memory space */
330 int read_process_memory( struct process
*process
, client_ptr_t ptr
, data_size_t size
, char *dest
)
332 struct thread
*thread
= get_ptrace_thread( process
);
333 unsigned int first_offset
, last_offset
, len
;
336 if (!thread
) return 0;
338 if ((unsigned long)ptr
!= ptr
)
340 set_error( STATUS_ACCESS_DENIED
);
344 first_offset
= ptr
% sizeof(long);
345 last_offset
= (size
+ first_offset
) % sizeof(long);
346 if (!last_offset
) last_offset
= sizeof(long);
348 addr
= (long *)(unsigned long)(ptr
- first_offset
);
349 len
= (size
+ first_offset
+ sizeof(long) - 1) / sizeof(long);
351 if (suspend_for_ptrace( thread
))
353 if (len
> 3) /* /proc/pid/mem should be faster for large sizes */
358 sprintf( procmem
, "/proc/%u/mem", process
->unix_pid
);
359 if ((fd
= open( procmem
, O_RDONLY
)) != -1)
361 ssize_t ret
= pread( fd
, dest
, size
, ptr
);
373 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
374 memcpy( dest
, (char *)&data
+ first_offset
, sizeof(long) - first_offset
);
375 dest
+= sizeof(long) - first_offset
;
382 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
383 memcpy( dest
, &data
, sizeof(long) );
384 dest
+= sizeof(long);
388 if (read_thread_long( thread
, addr
++, &data
) == -1) goto done
;
389 memcpy( dest
, (char *)&data
+ first_offset
, last_offset
- first_offset
);
393 resume_after_ptrace( thread
);
398 /* make sure we can write to the whole address range */
399 /* len is the total size (in ints) */
400 static int check_process_write_access( struct thread
*thread
, long *addr
, data_size_t len
)
402 int page
= get_page_size() / sizeof(int);
406 if (write_thread_long( thread
, addr
, 0, 0 ) == -1) return 0;
407 if (len
<= page
) break;
411 return (write_thread_long( thread
, addr
+ len
- 1, 0, 0 ) != -1);
414 /* write data to a process memory space */
415 int write_process_memory( struct process
*process
, client_ptr_t ptr
, data_size_t size
, const char *src
)
417 struct thread
*thread
= get_ptrace_thread( process
);
422 unsigned long first_mask
, first_offset
, last_mask
, last_offset
;
424 if (!thread
) return 0;
426 if ((unsigned long)ptr
!= ptr
)
428 set_error( STATUS_ACCESS_DENIED
);
432 /* compute the mask for the first long */
434 first_offset
= ptr
% sizeof(long);
435 memset( &first_mask
, 0, first_offset
);
437 /* compute the mask for the last long */
438 last_offset
= (size
+ first_offset
) % sizeof(long);
439 if (!last_offset
) last_offset
= sizeof(long);
441 memset( &last_mask
, 0xff, last_offset
);
443 addr
= (long *)(unsigned long)(ptr
- first_offset
);
444 len
= (size
+ first_offset
+ sizeof(long) - 1) / sizeof(long);
446 if (suspend_for_ptrace( thread
))
448 if (!check_process_write_access( thread
, addr
, len
))
450 set_error( STATUS_ACCESS_DENIED
);
459 sprintf( procmem
, "/proc/%u/mem", process
->unix_pid
);
460 if ((fd
= open( procmem
, O_WRONLY
)) != -1)
462 ssize_t r
= pwrite( fd
, src
, size
, ptr
);
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(HAVE_SYS_USER_H) && (defined(__i386__) || defined(__x86_64__))
533 #include <sys/user.h>
535 /* debug register offset in struct user */
536 #define DR_OFFSET(dr) ((((struct user *)0)->u_debugreg) + (dr))
538 /* retrieve the thread x86 registers */
539 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
541 int i
, pid
= get_ptrace_tid(thread
);
544 /* all other regs are handled on the client side */
545 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
547 if (!suspend_for_ptrace( thread
)) return;
549 for (i
= 0; i
< 8; i
++)
551 if (i
== 4 || i
== 5) continue;
553 data
[i
] = ptrace( PTRACE_PEEKUSER
, pid
, DR_OFFSET(i
), 0 );
554 if ((data
[i
] == -1) && errno
)
560 switch (context
->cpu
)
563 context
->debug
.i386_regs
.dr0
= data
[0];
564 context
->debug
.i386_regs
.dr1
= data
[1];
565 context
->debug
.i386_regs
.dr2
= data
[2];
566 context
->debug
.i386_regs
.dr3
= data
[3];
567 context
->debug
.i386_regs
.dr6
= data
[6];
568 context
->debug
.i386_regs
.dr7
= data
[7];
571 context
->debug
.x86_64_regs
.dr0
= data
[0];
572 context
->debug
.x86_64_regs
.dr1
= data
[1];
573 context
->debug
.x86_64_regs
.dr2
= data
[2];
574 context
->debug
.x86_64_regs
.dr3
= data
[3];
575 context
->debug
.x86_64_regs
.dr6
= data
[6];
576 context
->debug
.x86_64_regs
.dr7
= data
[7];
579 set_error( STATUS_INVALID_PARAMETER
);
582 context
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
584 resume_after_ptrace( thread
);
587 /* set the thread x86 registers */
588 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
590 int pid
= get_ptrace_tid( thread
);
592 /* all other regs are handled on the client side */
593 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
595 if (!suspend_for_ptrace( thread
)) return;
597 switch (context
->cpu
)
600 /* Linux 2.6.33+ does DR0-DR3 alignment validation, so it has to know LEN bits first */
601 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.i386_regs
.dr7
& 0xffff0000 ) == -1) goto error
;
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 /* Linux 2.6.33+ needs enable bits set briefly to update value returned by PEEKUSER later */
613 ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.i386_regs
.dr7
| 0x55 );
614 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.i386_regs
.dr7
) == -1) goto error
;
615 if (thread
->context
) thread
->context
->debug
.i386_regs
.dr7
= context
->debug
.i386_regs
.dr7
;
618 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.x86_64_regs
.dr7
& 0xffff0000 ) == -1) goto error
;
619 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(0), context
->debug
.x86_64_regs
.dr0
) == -1) goto error
;
620 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr0
= context
->debug
.x86_64_regs
.dr0
;
621 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(1), context
->debug
.x86_64_regs
.dr1
) == -1) goto error
;
622 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr1
= context
->debug
.x86_64_regs
.dr1
;
623 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(2), context
->debug
.x86_64_regs
.dr2
) == -1) goto error
;
624 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr2
= context
->debug
.x86_64_regs
.dr2
;
625 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(3), context
->debug
.x86_64_regs
.dr3
) == -1) goto error
;
626 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr3
= context
->debug
.x86_64_regs
.dr3
;
627 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(6), context
->debug
.x86_64_regs
.dr6
) == -1) goto error
;
628 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr6
= context
->debug
.x86_64_regs
.dr6
;
629 ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.x86_64_regs
.dr7
| 0x55 );
630 if (ptrace( PTRACE_POKEUSER
, pid
, DR_OFFSET(7), context
->debug
.x86_64_regs
.dr7
) == -1) goto error
;
631 if (thread
->context
) thread
->context
->debug
.x86_64_regs
.dr7
= context
->debug
.x86_64_regs
.dr7
;
634 set_error( STATUS_INVALID_PARAMETER
);
636 resume_after_ptrace( thread
);
640 resume_after_ptrace( thread
);
643 #elif defined(__i386__) && defined(PTRACE_GETDBREGS) && defined(PTRACE_SETDBREGS) && \
644 (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__))
646 #include <machine/reg.h>
648 /* retrieve the thread x86 registers */
649 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
651 int pid
= get_ptrace_tid(thread
);
654 /* all other regs are handled on the client side */
655 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
657 if (!suspend_for_ptrace( thread
)) return;
659 if (ptrace( PTRACE_GETDBREGS
, pid
, (caddr_t
) &dbregs
, 0 ) == -1) file_set_error();
663 /* needed for FreeBSD, the structure fields have changed under 5.x */
664 context
->debug
.i386_regs
.dr0
= DBREG_DRX((&dbregs
), 0);
665 context
->debug
.i386_regs
.dr1
= DBREG_DRX((&dbregs
), 1);
666 context
->debug
.i386_regs
.dr2
= DBREG_DRX((&dbregs
), 2);
667 context
->debug
.i386_regs
.dr3
= DBREG_DRX((&dbregs
), 3);
668 context
->debug
.i386_regs
.dr6
= DBREG_DRX((&dbregs
), 6);
669 context
->debug
.i386_regs
.dr7
= DBREG_DRX((&dbregs
), 7);
671 context
->debug
.i386_regs
.dr0
= dbregs
.dr0
;
672 context
->debug
.i386_regs
.dr1
= dbregs
.dr1
;
673 context
->debug
.i386_regs
.dr2
= dbregs
.dr2
;
674 context
->debug
.i386_regs
.dr3
= dbregs
.dr3
;
675 context
->debug
.i386_regs
.dr6
= dbregs
.dr6
;
676 context
->debug
.i386_regs
.dr7
= dbregs
.dr7
;
678 context
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
680 resume_after_ptrace( thread
);
683 /* set the thread x86 registers */
684 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
686 int pid
= get_ptrace_tid(thread
);
689 /* all other regs are handled on the client side */
690 assert( flags
== SERVER_CTX_DEBUG_REGISTERS
);
692 if (!suspend_for_ptrace( thread
)) return;
695 /* needed for FreeBSD, the structure fields have changed under 5.x */
696 DBREG_DRX((&dbregs
), 0) = context
->debug
.i386_regs
.dr0
;
697 DBREG_DRX((&dbregs
), 1) = context
->debug
.i386_regs
.dr1
;
698 DBREG_DRX((&dbregs
), 2) = context
->debug
.i386_regs
.dr2
;
699 DBREG_DRX((&dbregs
), 3) = context
->debug
.i386_regs
.dr3
;
700 DBREG_DRX((&dbregs
), 4) = 0;
701 DBREG_DRX((&dbregs
), 5) = 0;
702 DBREG_DRX((&dbregs
), 6) = context
->debug
.i386_regs
.dr6
;
703 DBREG_DRX((&dbregs
), 7) = context
->debug
.i386_regs
.dr7
;
705 dbregs
.dr0
= context
->debug
.i386_regs
.dr0
;
706 dbregs
.dr1
= context
->debug
.i386_regs
.dr1
;
707 dbregs
.dr2
= context
->debug
.i386_regs
.dr2
;
708 dbregs
.dr3
= context
->debug
.i386_regs
.dr3
;
711 dbregs
.dr6
= context
->debug
.i386_regs
.dr6
;
712 dbregs
.dr7
= context
->debug
.i386_regs
.dr7
;
714 if (ptrace( PTRACE_SETDBREGS
, pid
, (caddr_t
) &dbregs
, 0 ) == -1) file_set_error();
715 else if (thread
->context
)
716 thread
->context
->debug
.i386_regs
= context
->debug
.i386_regs
; /* update the cached values */
717 resume_after_ptrace( thread
);
720 #else /* linux || __FreeBSD__ */
722 /* retrieve the thread x86 registers */
723 void get_thread_context( struct thread
*thread
, context_t
*context
, unsigned int flags
)
727 /* set the thread x86 debug registers */
728 void set_thread_context( struct thread
*thread
, const context_t
*context
, unsigned int flags
)
732 #endif /* linux || __FreeBSD__ */
734 #endif /* USE_PTRACE */