1 /*
2 * i386 register context support
3 *
4 * Copyright (C) 1999 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22
23 #ifdef __i386__
24
25 #include <assert.h>
26 #include <errno.h>
27 #include <stdarg.h>
28 #include <unistd.h>
29
30 #include "windef.h"
31
32 #include "file.h"
33 #include "thread.h"
34 #include "request.h"
35
36 /* copy a context structure according to the flags */
37 void copy_context( CONTEXT *to, const CONTEXT *from, unsigned int flags )
38 {
39 flags &= ~CONTEXT_i386; /* get rid of CPU id */
40 if (flags & CONTEXT_CONTROL)
41 {
42 to->Ebp = from->Ebp;
43 to->Eip = from->Eip;
44 to->Esp = from->Esp;
45 to->SegCs = from->SegCs;
46 to->SegSs = from->SegSs;
47 to->EFlags = from->EFlags;
48 }
49 if (flags & CONTEXT_INTEGER)
50 {
51 to->Eax = from->Eax;
52 to->Ebx = from->Ebx;
53 to->Ecx = from->Ecx;
54 to->Edx = from->Edx;
55 to->Esi = from->Esi;
56 to->Edi = from->Edi;
57 }
58 if (flags & CONTEXT_SEGMENTS)
59 {
60 to->SegDs = from->SegDs;
61 to->SegEs = from->SegEs;
62 to->SegFs = from->SegFs;
63 to->SegGs = from->SegGs;
64 }
65 if (flags & CONTEXT_FLOATING_POINT)
66 {
67 to->FloatSave = from->FloatSave;
68 }
69 if (flags & CONTEXT_EXTENDED_REGISTERS)
70 {
71 memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
72 }
73 if (flags & CONTEXT_DEBUG_REGISTERS)
74 {
75 to->Dr0 = from->Dr0;
76 to->Dr1 = from->Dr1;
77 to->Dr2 = from->Dr2;
78 to->Dr3 = from->Dr3;
79 to->Dr6 = from->Dr6;
80 to->Dr7 = from->Dr7;
81 }
82 to->ContextFlags |= flags;
83 }
84
85 /* retrieve the current instruction pointer of a context */
86 void *get_context_ip( const CONTEXT *context )
87 {
88 return (void *)context->Eip;
89 }
90
91 /* return the context flag that contains the CPU id */
92 unsigned int get_context_cpu_flag(void)
93 {
94 return CONTEXT_i386;
95 }
96
97 /* return only the context flags that correspond to system regs */
98 /* (system regs are the ones we can't access on the client side) */
99 unsigned int get_context_system_regs( unsigned int flags )
100 {
101 return flags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386);
102 }
103
104 #endif /* __i386__ */
105
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