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
|
/*
* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
using System;
class CodeElementJump : CodeElement {
uint jumpType;
CodeElement target;
internal CodeElementJump(uint jumpType)
{
this.jumpType = jumpType;
}
/* obsolete
internal override int Length {
get {
int len = Encode7EUnsigned(jumpType, null);
int joff = JumpOff;
if (joff == Int32.MinValue) {
len ++;
} else {
len += Encode7ESigned(joff, null);
}
return len;
}
}
*/
internal override int GetLength(bool oneByteCode)
{
int len = oneByteCode ? 1 : Encode7EUnsigned(jumpType, null);
int joff = JumpOff;
if (joff == Int32.MinValue) {
len ++;
} else {
len += Encode7ESigned(joff, null);
}
return len;
}
internal override void SetJumpTarget(CodeElement target)
{
this.target = target;
}
int JumpOff {
get {
if (target == null || Address < 0 || target.Address < 0)
{
return Int32.MinValue;
} else {
return target.Address - (Address + LastLength);
}
}
}
internal override int Encode(BlobWriter bw, bool oneByteCode)
{
if (bw == null) {
return GetLength(oneByteCode);
}
int len;
if (oneByteCode) {
len = EncodeOneByte(jumpType, bw);
} else {
len = Encode7EUnsigned(jumpType, bw);
}
int joff = JumpOff;
if (joff == Int32.MinValue) {
throw new Exception("Unresolved addresses");
}
return len + Encode7ESigned(joff, bw);
}
}
|
