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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
Derived from source code of TrueCrypt 7.1a, which is
Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
by the TrueCrypt License 3.0.
Modifications and additions to the original source code (contained in this file)
and all other portions of this file are Copyright (c) 2013-2016 IDRIX
and are governed by the Apache License 2.0 the full text of which is
contained in the file License.txt included in VeraCrypt binary and source
code distribution packages.
*/
#include "Platform.h"
#include "BootConsoleIo.h"
uint64 operator+ (const uint64 &a, const uint64 &b)
{
int carry = 0;
uint64 r;
r.LowPart = a.LowPart + b.LowPart;
__asm
{
jnc nocarry
mov carry, 1
nocarry:
}
r.HighPart = a.HighPart + b.HighPart + carry;
return r;
}
uint64 operator+ (const uint64 &a, uint32 b)
{
uint64 b64;
b64.HighPart = 0;
b64.LowPart = b;
return a + b64;
}
uint64 &operator+= (uint64 &a, const uint64 &b)
{
return a = a + b;
}
uint64 operator- (const uint64 &a, const uint64 &b)
{
int carry = 0;
uint64 r;
r.LowPart = a.LowPart - b.LowPart;
__asm
{
jnc nocarry
mov carry, 1
nocarry:
}
r.HighPart = a.HighPart - b.HighPart - carry;
return r;
}
uint64 operator- (const uint64 &a, uint32 b)
{
uint64 b64;
b64.HighPart = 0;
b64.LowPart = b;
return a - b64;
}
uint64 &operator-= (uint64 &a, const uint64 &b)
{
return a = a - b;
}
uint64 operator>> (const uint64 &a, int shiftCount)
{
uint64 r = a;
while (shiftCount--)
{
r.LowPart >>= 1;
if ((byte) r.HighPart & 1)
r.LowPart |= 0x80000000UL;
r.HighPart >>= 1;
}
return r;
}
uint64 operator<< (const uint64 &a, int shiftCount)
{
uint64 r = a;
while (shiftCount--)
r += r;
return r;
}
uint64 &operator++ (uint64 &a)
{
uint64 b;
b.HighPart = 0;
b.LowPart = 1;
return a += b;
}
bool operator== (const uint64 &a, const uint64 &b)
{
return a.HighPart == b.HighPart && a.LowPart == b.LowPart;
}
bool operator> (const uint64 &a, const uint64 &b)
{
return (a.HighPart > b.HighPart) || (a.HighPart == b.HighPart && a.LowPart > b.LowPart);
}
bool operator< (const uint64 &a, const uint64 &b)
{
return (a.HighPart < b.HighPart) || (a.HighPart == b.HighPart && a.LowPart < b.LowPart);
}
bool operator>= (const uint64 &a, const uint64 &b)
{
return a > b || a == b;
}
bool operator<= (const uint64 &a, const uint64 &b)
{
return a < b || a == b;
}
bool TestInt64 ()
{
uint64 a, b, c;
a.HighPart = 0x00112233UL;
a.LowPart = 0xabcd1234UL;
b.HighPart = 0x00ffeeddUL;
b.LowPart = 0xffffFFFFUL;
a += b;
a -= b;
++a;
b = b + (uint32) 1UL;
c = (a - ((a + b) >> 32) - (uint32) 1UL);
if (c.HighPart != 0x112233UL || c.LowPart != 0xAABC0123UL)
return false;
c = c << 9;
return c.HighPart == 0x22446755UL && c.LowPart == 0x78024600UL;
}
void CopyMemory (void *source, uint16 destSegment, uint16 destOffset, uint16 blockSize)
{
__asm
{
push es
mov si, ss:source
mov es, ss:destSegment
mov di, ss:destOffset
mov cx, ss:blockSize
cld
rep movsb
pop es
}
}
void CopyMemory (uint16 sourceSegment, uint16 sourceOffset, void *destination, uint16 blockSize)
{
__asm
{
push ds
push es
mov ax, ds
mov es, ax
mov di, ss:destination
mov si, ss:sourceOffset
mov cx, ss:blockSize
mov ds, ss:sourceSegment
cld
rep movsb
pop es
pop ds
}
}
void EraseMemory (void *memory, int size)
{
memset (memory, 0, size);
}
uint32 GetLinearAddress (uint16 segment, uint16 offset)
{
return (uint32 (segment) << 4) + offset;
}
bool RegionsIntersect (const uint64 &start1, uint32 length1, const uint64 &start2, const uint64 &end2)
{
uint64 end1 = start1 + length1 - 1UL;
uint64 intersectEnd = (end1 <= end2) ? end1 : end2;
uint64 intersectStart = (start1 >= start2) ? start1 : start2;
if (intersectStart > intersectEnd)
return false;
return (intersectEnd + 1UL - intersectStart).LowPart != 0;
}
void ThrowFatalException (int line)
{
PrintChar ('#'); Print (line);
while (1);
}
|
