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
|
using Ryujinx.Common;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Process;
using System;
using System.Diagnostics;
namespace Ryujinx.HLE.HOS.Kernel.Memory
{
class KCodeMemory : KAutoObject
{
public KProcess Owner { get; private set; }
private readonly KPageList _pageList;
private readonly object _lock;
private ulong _address;
private bool _isOwnerMapped;
private bool _isMapped;
public KCodeMemory(KernelContext context) : base(context)
{
_pageList = new KPageList();
_lock = new object();
}
public KernelResult Initialize(ulong address, ulong size)
{
Owner = KernelStatic.GetCurrentProcess();
KernelResult result = Owner.MemoryManager.BorrowCodeMemory(_pageList, address, size);
if (result != KernelResult.Success)
{
return result;
}
Owner.CpuMemory.Fill(address, size, 0xff);
Owner.IncrementReferenceCount();
_address = address;
_isMapped = false;
_isOwnerMapped = false;
return KernelResult.Success;
}
public KernelResult Map(ulong address, ulong size, KMemoryPermission perm)
{
if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
{
return KernelResult.InvalidSize;
}
lock (_lock)
{
if (_isMapped)
{
return KernelResult.InvalidState;
}
KProcess process = KernelStatic.GetCurrentProcess();
KernelResult result = process.MemoryManager.MapPages(address, _pageList, MemoryState.CodeWritable, KMemoryPermission.ReadAndWrite);
if (result != KernelResult.Success)
{
return result;
}
_isMapped = true;
}
return KernelResult.Success;
}
public KernelResult MapToOwner(ulong address, ulong size, KMemoryPermission permission)
{
if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
{
return KernelResult.InvalidSize;
}
lock (_lock)
{
if (_isOwnerMapped)
{
return KernelResult.InvalidState;
}
Debug.Assert(permission == KMemoryPermission.Read || permission == KMemoryPermission.ReadAndExecute);
KernelResult result = Owner.MemoryManager.MapPages(address, _pageList, MemoryState.CodeReadOnly, permission);
if (result != KernelResult.Success)
{
return result;
}
_isOwnerMapped = true;
}
return KernelResult.Success;
}
public KernelResult Unmap(ulong address, ulong size)
{
if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
{
return KernelResult.InvalidSize;
}
lock (_lock)
{
KProcess process = KernelStatic.GetCurrentProcess();
KernelResult result = process.MemoryManager.UnmapPages(address, _pageList, MemoryState.CodeWritable);
if (result != KernelResult.Success)
{
return result;
}
Debug.Assert(_isMapped);
_isMapped = false;
}
return KernelResult.Success;
}
public KernelResult UnmapFromOwner(ulong address, ulong size)
{
if (_pageList.GetPagesCount() != BitUtils.DivRoundUp(size, KPageTableBase.PageSize))
{
return KernelResult.InvalidSize;
}
lock (_lock)
{
KernelResult result = Owner.MemoryManager.UnmapPages(address, _pageList, MemoryState.CodeReadOnly);
if (result != KernelResult.Success)
{
return result;
}
Debug.Assert(_isOwnerMapped);
_isOwnerMapped = false;
}
return KernelResult.Success;
}
protected override void Destroy()
{
if (!_isMapped && !_isOwnerMapped)
{
ulong size = _pageList.GetPagesCount() * KPageTableBase.PageSize;
if (Owner.MemoryManager.UnborrowCodeMemory(_address, size, _pageList) != KernelResult.Success)
{
throw new InvalidOperationException("Unexpected failure restoring transfer memory attributes.");
}
}
Owner.DecrementReferenceCount();
}
}
}
|
