2 * PowerPC register context support
4 * Copyright (C) 2002 Marcus Meissner, SuSE Linux AG.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <sys/types.h>
32 #ifdef HAVE_SYS_PTRACE_H
33 # include <sys/ptrace.h>
41 /* retrieve a thread context */
42 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
44 int pid = thread->unix_pid;
45 if (flags & CONTEXT_FULL)
47 if (flags & CONTEXT_INTEGER)
49 #define XREG(x,y) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
50 #define IREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
51 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
52 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
53 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
54 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
55 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
60 if (flags & CONTEXT_CONTROL)
65 XREG(36,Lr); /* 36 is LNK ... probably Lr ? */
68 if (flags & CONTEXT_FLOATING_POINT)
70 #define FREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
103 XREG((48+32*2),Fpscr);
113 #define XREG(x,y) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
114 #define IREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
115 #define FREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
116 /* set a thread context */
117 static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
119 int pid = thread->unix_pid;
120 if (flags & CONTEXT_FULL)
122 if (flags & CONTEXT_INTEGER)
124 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
125 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
126 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
127 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
128 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
133 if (flags & CONTEXT_CONTROL)
141 if (flags & CONTEXT_FLOATING_POINT)
176 XREG((48+32*2),Fpscr);
186 #define IREG(x) to->Gpr##x = from->Gpr##x;
187 #define FREG(x) to->Fpr##x = from->Fpr##x;
188 #define CREG(x) to->x = from->x;
189 /* copy a context structure according to the flags */
190 static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
192 if (flags & CONTEXT_CONTROL)
198 if (flags & CONTEXT_INTEGER)
200 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
201 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
202 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
203 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
204 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
208 if (flags & CONTEXT_FLOATING_POINT)
246 /* retrieve the current instruction pointer of a thread */
247 void *get_thread_ip( struct thread *thread )
251 if (suspend_for_ptrace( thread ))
253 get_thread_context( thread, CONTEXT_CONTROL, &context );
254 resume_thread( thread );
256 return (void *)context.Iar;
259 /* determine if we should continue the thread in single-step mode */
260 int get_thread_single_step( struct thread *thread )
263 if (thread->context) return 0;
264 get_thread_context( thread, CONTEXT_CONTROL, &context );
266 # define MSR_SE (1<<10)
268 return (context.Msr & MSR_SE) != 0;
271 /* retrieve the current context of a thread */
272 DECL_HANDLER(get_thread_context)
274 struct thread *thread;
276 int flags = req->flags;
278 if (get_reply_max_size() < sizeof(CONTEXT))
280 set_error( STATUS_INVALID_PARAMETER );
283 if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
285 if ((data = set_reply_data_size( sizeof(CONTEXT) )))
287 if (thread->context) /* thread is inside an exception event */
289 copy_context( data, thread->context, flags );
292 if (flags && suspend_for_ptrace( thread ))
294 get_thread_context( thread, flags, data );
295 resume_thread( thread );
298 release_object( thread );
302 /* set the current context of a thread */
303 DECL_HANDLER(set_thread_context)
305 struct thread *thread;
306 int flags = req->flags;
308 if (get_req_data_size() < sizeof(CONTEXT))
310 set_error( STATUS_INVALID_PARAMETER );
313 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
315 if (thread->context) /* thread is inside an exception event */
317 copy_context( thread->context, get_req_data(), flags );
320 if (flags && suspend_for_ptrace( thread ))
322 set_thread_context( thread, flags, get_req_data() );
323 resume_thread( thread );
325 release_object( thread );
329 #endif /* __powerpc__ */