2 * i386 register context 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
36 /* copy a context structure according to the flags */
37 void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
39 flags &= ~CONTEXT_i386; /* get rid of CPU id */
40 if (flags & CONTEXT_CONTROL)
45 to->SegCs = from->SegCs;
46 to->SegSs = from->SegSs;
47 to->EFlags = from->EFlags;
49 if (flags & CONTEXT_INTEGER)
58 if (flags & CONTEXT_SEGMENTS)
60 to->SegDs = from->SegDs;
61 to->SegEs = from->SegEs;
62 to->SegFs = from->SegFs;
63 to->SegGs = from->SegGs;
65 if (flags & CONTEXT_FLOATING_POINT)
67 to->FloatSave = from->FloatSave;
69 if (flags & CONTEXT_DEBUG_REGISTERS)
78 to->ContextFlags |= flags;
81 /* retrieve the current instruction pointer of a context */
82 void *get_context_ip( const CONTEXT *context )
84 return (void *)context->Eip;
87 /* return the context flag that contains the CPU id */
88 unsigned int get_context_cpu_flag(void)
93 /* return only the context flags that correspond to system regs */
94 /* (system regs are the ones we can't access on the client side) */
95 unsigned int get_context_system_regs( unsigned int flags )
97 return flags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386);
100 #endif /* __i386__ */