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>
42 /* retrieve a thread context */
43 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
45 int pid = get_ptrace_pid(thread);
46 if (flags & CONTEXT_FULL)
48 if (flags & CONTEXT_INTEGER)
50 #define XREG(x,y) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
51 #define IREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
52 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
53 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
54 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
55 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
56 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
61 if (flags & CONTEXT_CONTROL)
66 XREG(36,Lr); /* 36 is LNK ... probably Lr ? */
69 if (flags & CONTEXT_FLOATING_POINT)
71 #define FREG(x) if (ptrace( PTRACE_PEEKUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
104 XREG((48+32*2),Fpscr);
114 #define XREG(x,y) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->y) == -1) goto error;
115 #define IREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)(x<<2), &context->Gpr##x) == -1) goto error;
116 #define FREG(x) if (ptrace( PTRACE_POKEUSER, pid, (void*)((48+x*2)<<2), &context->Fpr##x) == -1) goto error;
117 /* set a thread context */
118 static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
120 int pid = get_ptrace_pid(thread);
121 if (flags & CONTEXT_FULL)
123 if (flags & CONTEXT_INTEGER)
125 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
126 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
127 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
128 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
129 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
134 if (flags & CONTEXT_CONTROL)
142 if (flags & CONTEXT_FLOATING_POINT)
177 XREG((48+32*2),Fpscr);
187 #define IREG(x) to->Gpr##x = from->Gpr##x;
188 #define FREG(x) to->Fpr##x = from->Fpr##x;
189 #define CREG(x) to->x = from->x;
190 /* copy a context structure according to the flags */
191 static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
193 if (flags & CONTEXT_CONTROL)
199 if (flags & CONTEXT_INTEGER)
201 IREG(0); IREG(1); IREG(2); IREG(3); IREG(4); IREG(5); IREG(6);
202 IREG(7); IREG(8); IREG(9); IREG(10); IREG(11); IREG(12); IREG(13);
203 IREG(14); IREG(15); IREG(16); IREG(17); IREG(18); IREG(19);
204 IREG(20); IREG(21); IREG(22); IREG(23); IREG(24); IREG(25);
205 IREG(26); IREG(27); IREG(28); IREG(29); IREG(30); IREG(31);
209 if (flags & CONTEXT_FLOATING_POINT)
247 /* retrieve the current instruction pointer of a thread */
248 void *get_thread_ip( struct thread *thread )
252 if (suspend_for_ptrace( thread ))
254 get_thread_context( thread, CONTEXT_CONTROL, &context );
255 resume_after_ptrace( thread );
257 return (void *)context.Iar;
260 /* determine if we should continue the thread in single-step mode */
261 int get_thread_single_step( struct thread *thread )
264 if (thread->context) return 0;
265 get_thread_context( thread, CONTEXT_CONTROL, &context );
267 # define MSR_SE (1<<10)
269 return (context.Msr & MSR_SE) != 0;
272 /* send a signal to a specific thread */
273 int tkill( int pid, int sig )
275 /* FIXME: should do something here */
280 /* retrieve the current context of a thread */
281 DECL_HANDLER(get_thread_context)
283 struct thread *thread;
285 int flags = req->flags;
287 if (get_reply_max_size() < sizeof(CONTEXT))
289 set_error( STATUS_INVALID_PARAMETER );
292 if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
294 if ((data = set_reply_data_size( sizeof(CONTEXT) )))
296 if (thread->context) /* thread is inside an exception event */
298 copy_context( data, thread->context, flags );
301 if (flags && suspend_for_ptrace( thread ))
303 get_thread_context( thread, flags, data );
304 resume_after_ptrace( thread );
307 release_object( thread );
311 /* set the current context of a thread */
312 DECL_HANDLER(set_thread_context)
314 struct thread *thread;
315 int flags = req->flags;
317 if (get_req_data_size() < sizeof(CONTEXT))
319 set_error( STATUS_INVALID_PARAMETER );
322 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
324 if (thread->context) /* thread is inside an exception event */
326 copy_context( thread->context, get_req_data(), flags );
329 if (flags && suspend_for_ptrace( thread ))
331 set_thread_context( thread, flags, get_req_data() );
332 resume_after_ptrace( thread );
334 release_object( thread );
338 #endif /* __powerpc__ */