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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
|
using ChocolArm64.Exceptions;
using ChocolArm64.State;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
namespace ChocolArm64.Memory
{
public unsafe class AMemory
{
private const long ErgMask = (4 << AThreadState.ErgSizeLog2) - 1;
public AMemoryMgr Manager { get; private set; }
private struct ExMonitor
{
public long Position { get; private set; }
private bool ExState;
public ExMonitor(long Position, bool ExState)
{
this.Position = Position;
this.ExState = ExState;
}
public bool HasExclusiveAccess(long Position)
{
return this.Position == Position && ExState;
}
public void Reset()
{
ExState = false;
}
}
private Dictionary<int, ExMonitor> Monitors;
private HashSet<long> ExAddrs;
private byte* RamPtr;
public AMemory(IntPtr Ram, AMemoryAlloc Allocator)
{
Manager = new AMemoryMgr(Allocator);
Monitors = new Dictionary<int, ExMonitor>();
ExAddrs = new HashSet<long>();
RamPtr = (byte*)Ram;
}
public void RemoveMonitor(int ThreadId)
{
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadId, out ExMonitor Monitor))
{
ExAddrs.Remove(Monitor.Position);
}
Monitors.Remove(ThreadId);
}
}
public void SetExclusive(AThreadState ThreadState, long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
ExAddrs.Remove(Monitor.Position);
}
bool ExState = ExAddrs.Add(Position);
Monitor = new ExMonitor(Position, ExState);
if (!Monitors.TryAdd(ThreadState.ThreadId, Monitor))
{
Monitors[ThreadState.ThreadId] = Monitor;
}
}
}
public bool TestExclusive(AThreadState ThreadState, long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
if (!Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
return false;
}
return Monitor.HasExclusiveAccess(Position);
}
}
public void ClearExclusive(AThreadState ThreadState)
{
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
Monitor.Reset();
ExAddrs.Remove(Monitor.Position);
}
}
}
public bool AcquireAddress(long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
return ExAddrs.Add(Position);
}
}
public void ReleaseAddress(long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
ExAddrs.Remove(Position);
}
}
public sbyte ReadSByte(long Position) => (sbyte)ReadByte (Position);
public short ReadInt16(long Position) => (short)ReadUInt16(Position);
public int ReadInt32(long Position) => (int)ReadUInt32(Position);
public long ReadInt64(long Position) => (long)ReadUInt64(Position);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public byte ReadByte(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((byte*)(RamPtr + (uint)Position));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public ushort ReadUInt16(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((ushort*)(RamPtr + (uint)Position));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public uint ReadUInt32(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((uint*)(RamPtr + (uint)Position));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public ulong ReadUInt64(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return *((ulong*)(RamPtr + (uint)Position));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public AVec ReadVector8(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return new AVec() { B0 = ReadByte(Position) };
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public AVec ReadVector16(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return new AVec() { H0 = ReadUInt16(Position) };
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public AVec ReadVector32(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return new AVec() { W0 = ReadUInt32(Position) };
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public AVec ReadVector64(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return new AVec() { X0 = ReadUInt64(Position) };
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public AVec ReadVector128(long Position)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Read);
#endif
return new AVec()
{
X0 = ReadUInt64(Position + 0),
X1 = ReadUInt64(Position + 8)
};
}
public void WriteSByte(long Position, sbyte Value) => WriteByte (Position, (byte)Value);
public void WriteInt16(long Position, short Value) => WriteUInt16(Position, (ushort)Value);
public void WriteInt32(long Position, int Value) => WriteUInt32(Position, (uint)Value);
public void WriteInt64(long Position, long Value) => WriteUInt64(Position, (ulong)Value);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteByte(long Position, byte Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((byte*)(RamPtr + (uint)Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteUInt16(long Position, ushort Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((ushort*)(RamPtr + (uint)Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteUInt32(long Position, uint Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((uint*)(RamPtr + (uint)Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteUInt64(long Position, ulong Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
*((ulong*)(RamPtr + (uint)Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector8(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
WriteByte(Position, Value.B0);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector16(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
WriteUInt16(Position, Value.H0);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector32(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
WriteUInt32(Position, Value.W0);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector64(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
WriteUInt64(Position, Value.X0);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector128(long Position, AVec Value)
{
#if DEBUG
EnsureAccessIsValid(Position, AMemoryPerm.Write);
#endif
WriteUInt64(Position + 0, Value.X0);
WriteUInt64(Position + 8, Value.X1);
}
private void EnsureAccessIsValid(long Position, AMemoryPerm Perm)
{
if (!Manager.IsMapped(Position))
{
throw new VmmPageFaultException(Position);
}
if (!Manager.HasPermission(Position, Perm))
{
throw new VmmAccessViolationException(Position, Perm);
}
}
}
}
|
