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
|
// Copyright (c) 2017 Eric Mellino
// Copyright (c) 2019 Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
//
// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
using Mono.Cecil;
using Mono.Cecil.Cil;
using System;
using System.Linq;
using Mono.Collections.Generic;
using System.IO;
using System.Collections.Generic;
using System.Text;
namespace Vk.Rewrite
{
public class Program
{
const string mainVkNamespace = "Vulkan";
static TypeReference trefCalliRewrite;
static TypeReference trefPin;
static TypeReference trefStructureType;
public static int Main(string[] args)
{
if ((args.Length < 1) == true || args[0] == null) {
Console.WriteLine ("Error: argument 1 must be the path of VK.dll.");
return -1;
}
string vkDllPath = args[0];
string outputPath = null;
bool rewriteInPlace = false;
if (outputPath == null)
{
outputPath = Path.GetTempFileName ();
rewriteInPlace = true;
}
Rewrite(vkDllPath, outputPath);
if (rewriteInPlace) {
File.Delete (vkDllPath);
File.Copy (outputPath, vkDllPath);
File.Delete (outputPath);
outputPath = vkDllPath;
}
Console.WriteLine (outputPath + " rewrited.");
return 0;
}
private static void Rewrite(string vkDllPath, string outputPath)
{
using (AssemblyDefinition vkDll = AssemblyDefinition.ReadAssembly (vkDllPath))
{
ModuleDefinition mainModule = vkDll.Modules[0];
trefCalliRewrite = mainModule.GetType (mainVkNamespace+".Generator.CalliRewriteAttribute");
trefPin = mainModule.GetType (mainVkNamespace+".Generator.PinAttribute");
trefStructureType = mainModule.GetType (mainVkNamespace+".StructureTypeAttribute");
foreach (TypeDefinition type in mainModule.Types)
{
foreach (MethodDefinition method in type.Methods)
{
if (method.CustomAttributes.Any(ca => ca.AttributeType == trefCalliRewrite))
RewriteMethod (method);
}
}
vkDll.Write(outputPath);
}
}
static void RewriteMethod (MethodDefinition method)
{
ILProcessor il = method.Body.GetILProcessor();
il.Body.Instructions.Clear();
for (int i = 0; i < method.Parameters.Count; i++)
{
EmitLoadArgument (il, i, method.Parameters);
TypeReference parameterType = method.Parameters[i].ParameterType;
TypeDefinition td = parameterType.IsByReference ?
parameterType.GetElementType() as TypeDefinition :
parameterType as TypeDefinition;
PropertyDefinition pdSType = td?.Properties.FirstOrDefault (f=>f.Name == "sType");
CustomAttribute ca = td == null ? null : td.CustomAttributes.FirstOrDefault (ca => ca.AttributeType == trefStructureType);
int structType = 0;
if (ca != null) {
PropertyDefinition pd = (ca.AttributeType as TypeDefinition).Properties[0];
structType = (int)ca.ConstructorArguments[0].Value;
}
if (method.Parameters[i].CustomAttributes.Any(ca => ca.AttributeType == trefPin)) {
VariableDefinition variable = new VariableDefinition(parameterType);
method.Body.Variables.Add(variable);
il.Emit(OpCodes.Stloc, variable);
if (ca != null) {
il.Emit(OpCodes.Ldloca, variable);
il.Emit(OpCodes.Ldc_I4, structType);
il.Emit(OpCodes.Call, pdSType.SetMethod);
}
il.Emit(OpCodes.Ldloca, variable);
variable = new VariableDefinition(new PinnedType(new ByReferenceType(parameterType)));
method.Body.Variables.Add(variable);
il.Emit(OpCodes.Stloc, variable);
il.Emit(OpCodes.Ldloc, variable);
il.Emit(OpCodes.Conv_I);
} else if (parameterType.IsByReference) {
VariableDefinition byRefVariable = new VariableDefinition(new PinnedType(parameterType));
method.Body.Variables.Add(byRefVariable);
il.Emit(OpCodes.Stloc, byRefVariable);
if (pdSType != null) {
il.Emit(OpCodes.Ldloc, byRefVariable);
il.Emit(OpCodes.Ldc_I4, structType);
il.Emit(OpCodes.Call, pdSType.SetMethod);
}
il.Emit(OpCodes.Ldloc, byRefVariable);
il.Emit(OpCodes.Conv_I);
} else if (ca != null) {
VariableDefinition variable = new VariableDefinition(parameterType);
method.Body.Variables.Add(variable);
il.Emit(OpCodes.Stloc, variable);
il.Emit(OpCodes.Ldloca, variable);
il.Emit(OpCodes.Ldc_I4, structType);
il.Emit(OpCodes.Call, pdSType.SetMethod);
}
}
FieldDefinition field = method.DeclaringType.Fields.SingleOrDefault(fd => fd.Name == method.Name + "_ptr");
if (field == null)
throw new InvalidOperationException("Can't find function pointer field for " + method.Name);
il.Emit(OpCodes.Ldsfld, field);
CallSite callSite = new CallSite(method.ReturnType) {CallingConvention = MethodCallingConvention.StdCall};
foreach (ParameterDefinition pd in method.Parameters)
{
TypeReference parameterType;
if (pd.ParameterType.IsByReference || pd.CustomAttributes.Any(ca => ca.AttributeType == trefPin))
parameterType = new PointerType(pd.ParameterType.GetElementType());
else
parameterType = pd.ParameterType;
ParameterDefinition calliPD = new ParameterDefinition(pd.Name, pd.Attributes, parameterType);
callSite.Parameters.Add(calliPD);
}
il.Emit(OpCodes.Calli, callSite);
il.Emit(OpCodes.Ret);
if (method.Body.Variables.Count > 0)
method.Body.InitLocals = true;
}
static void EmitLoadArgument(ILProcessor il, int i, Collection<ParameterDefinition> parameters)
{
switch (i) {
case 0:
il.Emit(OpCodes.Ldarg_0);
break;
case 1:
il.Emit(OpCodes.Ldarg_1);
break;
case 2:
il.Emit(OpCodes.Ldarg_2);
break;
case 3:
il.Emit(OpCodes.Ldarg_3);
break;
default:
il.Emit(OpCodes.Ldarg, i);
break;
}
}
}
}
|
