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
|
using System;
using System.Runtime.InteropServices;
namespace Ryujinx.Memory
{
public static class MemoryManagerUnixHelper
{
[Flags]
public enum MmapProts : uint
{
PROT_NONE = 0,
PROT_READ = 1,
PROT_WRITE = 2,
PROT_EXEC = 4
}
[Flags]
public enum MmapFlags : uint
{
MAP_SHARED = 1,
MAP_PRIVATE = 2,
MAP_ANONYMOUS = 4,
MAP_NORESERVE = 8,
MAP_FIXED = 16,
MAP_UNLOCKED = 32
}
[Flags]
public enum OpenFlags : uint
{
O_RDONLY = 0,
O_WRONLY = 1,
O_RDWR = 2,
O_CREAT = 4,
O_EXCL = 8,
O_NOCTTY = 16,
O_TRUNC = 32,
O_APPEND = 64,
O_NONBLOCK = 128,
O_SYNC = 256,
}
private const int MAP_ANONYMOUS_LINUX_GENERIC = 0x20;
private const int MAP_NORESERVE_LINUX_GENERIC = 0x4000;
private const int MAP_UNLOCKED_LINUX_GENERIC = 0x80000;
private const int MAP_NORESERVE_DARWIN = 0x40;
private const int MAP_JIT_DARWIN = 0x800;
private const int MAP_ANONYMOUS_DARWIN = 0x1000;
public const int MADV_DONTNEED = 4;
public const int MADV_REMOVE = 9;
[DllImport("libc", EntryPoint = "mmap", SetLastError = true)]
private static extern IntPtr Internal_mmap(IntPtr address, ulong length, MmapProts prot, int flags, int fd, long offset);
[DllImport("libc", SetLastError = true)]
public static extern int mprotect(IntPtr address, ulong length, MmapProts prot);
[DllImport("libc", SetLastError = true)]
public static extern int munmap(IntPtr address, ulong length);
[DllImport("libc", SetLastError = true)]
public static extern IntPtr mremap(IntPtr old_address, ulong old_size, ulong new_size, int flags, IntPtr new_address);
[DllImport("libc", SetLastError = true)]
public static extern int madvise(IntPtr address, ulong size, int advice);
[DllImport("libc", SetLastError = true)]
public static extern int mkstemp(IntPtr template);
[DllImport("libc", SetLastError = true)]
public static extern int unlink(IntPtr pathname);
[DllImport("libc", SetLastError = true)]
public static extern int ftruncate(int fildes, IntPtr length);
[DllImport("libc", SetLastError = true)]
public static extern int close(int fd);
[DllImport("libc", SetLastError = true)]
public static extern int shm_open(IntPtr name, int oflag, uint mode);
[DllImport("libc", SetLastError = true)]
public static extern int shm_unlink(IntPtr name);
private static int MmapFlagsToSystemFlags(MmapFlags flags)
{
int result = 0;
if (flags.HasFlag(MmapFlags.MAP_SHARED))
{
result |= (int)MmapFlags.MAP_SHARED;
}
if (flags.HasFlag(MmapFlags.MAP_PRIVATE))
{
result |= (int)MmapFlags.MAP_PRIVATE;
}
if (flags.HasFlag(MmapFlags.MAP_FIXED))
{
result |= (int)MmapFlags.MAP_FIXED;
}
if (flags.HasFlag(MmapFlags.MAP_ANONYMOUS))
{
if (OperatingSystem.IsLinux())
{
result |= MAP_ANONYMOUS_LINUX_GENERIC;
}
else if (OperatingSystem.IsMacOS())
{
result |= MAP_ANONYMOUS_DARWIN;
}
else
{
throw new NotImplementedException();
}
}
if (flags.HasFlag(MmapFlags.MAP_NORESERVE))
{
if (OperatingSystem.IsLinux())
{
result |= MAP_NORESERVE_LINUX_GENERIC;
}
else if (OperatingSystem.IsMacOS())
{
result |= MAP_NORESERVE_DARWIN;
}
else
{
throw new NotImplementedException();
}
}
if (flags.HasFlag(MmapFlags.MAP_UNLOCKED))
{
if (OperatingSystem.IsLinux())
{
result |= MAP_UNLOCKED_LINUX_GENERIC;
}
else if (OperatingSystem.IsMacOS())
{
// FIXME: Doesn't exist on Darwin
}
else
{
throw new NotImplementedException();
}
}
if (OperatingSystem.IsMacOSVersionAtLeast(10, 14))
{
result |= MAP_JIT_DARWIN;
}
return result;
}
public static IntPtr mmap(IntPtr address, ulong length, MmapProts prot, MmapFlags flags, int fd, long offset)
{
return Internal_mmap(address, length, prot, MmapFlagsToSystemFlags(flags), fd, offset);
}
}
}
|
