1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* $OpenBSD: x86emu_util.c,v 1.6 2015/03/14 03:38:50 jsg Exp $ */
/* $NetBSD: x86emu_util.c,v 1.2 2007/12/04 17:32:22 joerg Exp $ */
/*
*
* Realmode X86 Emulator Library
*
* Copyright (C) 1996-1999 SciTech Software, Inc.
* Copyright (C) David Mosberger-Tang
* Copyright (C) 1999 Egbert Eich
* Copyright (C) 2007 Joerg Sonnenberger
*
* ========================================================================
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the authors not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The authors makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <sys/param.h>
#include <sys/endian.h>
#include <dev/x86emu/x86emu.h>
/*
* PARAMETERS:
* addr - Emulator memory address to read
*
* RETURNS:
* Byte value read from emulator memory.
*
* REMARKS:
* Reads a byte value from the emulator memory.
*/
static uint8_t
rdb(struct x86emu *emu, uint32_t addr)
{
if (addr > emu->mem_size - 1)
x86emu_halt_sys(emu);
return emu->mem_base[addr];
}
/*
* PARAMETERS:
* addr - Emulator memory address to read
*
* RETURNS:
* Word value read from emulator memory.
*
* REMARKS:
* Reads a word value from the emulator memory.
*/
static uint16_t
rdw(struct x86emu *emu, uint32_t addr)
{
if (addr > emu->mem_size - 2)
x86emu_halt_sys(emu);
#ifdef __STRICT_ALIGNMENT
if (addr & 1) {
u_int8_t *a = emu->mem_base + addr;
u_int16_t r;
r = ((*(a + 0) << 0) & 0x00ff) |
((*(a + 1) << 8) & 0xff00);
return r;
} else
return letoh32(*(u_int32_t *)(emu->mem_base + addr));
#else
return letoh16(*(u_int16_t *)(emu->mem_base + addr));
#endif
}
/*
* PARAMETERS:
* addr - Emulator memory address to read
*
* RETURNS:
* Long value read from emulator memory.
* REMARKS:
* Reads a long value from the emulator memory.
*/
static uint32_t
rdl(struct x86emu *emu, uint32_t addr)
{
if (addr > emu->mem_size - 4)
x86emu_halt_sys(emu);
#ifdef __STRICT_ALIGNMENT
if (addr & 3) {
u_int8_t *a = emu->mem_base + addr;
u_int32_t r;
r = ((*(a + 0) << 0) & 0x000000ff) |
((*(a + 1) << 8) & 0x0000ff00) |
((*(a + 2) << 16) & 0x00ff0000) |
((*(a + 3) << 24) & 0xff000000);
return r;
} else
return letoh32(*(u_int32_t *)(emu->mem_base + addr));
#else
return letoh32(*(u_int32_t *)(emu->mem_base + addr));
#endif
}
/*
* PARAMETERS:
* addr - Emulator memory address to read
* val - Value to store
*
* REMARKS:
* Writes a byte value to emulator memory.
*/
static void
wrb(struct x86emu *emu, uint32_t addr, uint8_t val)
{
if (addr > emu->mem_size - 1)
x86emu_halt_sys(emu);
emu->mem_base[addr] = val;
}
/*
* PARAMETERS:
* addr - Emulator memory address to read
* val - Value to store
*
* REMARKS:
* Writes a word value to emulator memory.
*/
static void
wrw(struct x86emu *emu, uint32_t addr, uint16_t val)
{
if (addr > emu->mem_size - 2)
x86emu_halt_sys(emu);
#ifdef __STRICT_ALIGNMENT
if (addr & 1) {
u_int8_t *a = emu->mem_base + addr;
*((a + 0)) = (val >> 0) & 0xff;
*((a + 1)) = (val >> 8) & 0xff;
} else
*((u_int16_t *)(emu->mem_base + addr)) = htole16(val);
#else
*((u_int16_t *)(emu->mem_base + addr)) = htole16(val);
#endif
}
/*
* PARAMETERS:
* addr - Emulator memory address to read
* val - Value to store
*
* REMARKS:
* Writes a long value to emulator memory.
*/
static void
wrl(struct x86emu *emu, uint32_t addr, uint32_t val)
{
if (addr > emu->mem_size - 4)
x86emu_halt_sys(emu);
#ifdef __STRICT_ALIGNMENT
if (addr & 3) {
u_int8_t *a = emu->mem_base + addr;
*((a + 0) = (val >> 0) & 0xff;
*((a + 1) = (val >> 8) & 0xff;
*((a + 2) = (val >> 16) & 0xff;
*((a + 3) = (val >> 24) & 0xff;
} else
*((u_int32_t *)(emu->mem_base + addr)) = htole32(val);
#else
*((u_int32_t *)(emu->mem_base + addr)) = htole32(val);
#endif
}
/* Setup */
void
x86emu_init_default(struct x86emu *emu)
{
int i;
emu->emu_rdb = rdb;
emu->emu_rdw = rdw;
emu->emu_rdl = rdl;
emu->emu_wrb = wrb;
emu->emu_wrw = wrw;
emu->emu_wrl = wrl;
for (i = 0; i < 256; i++)
emu->_x86emu_intrTab[i] = NULL;
}
|
