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) 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JITCode_h
#define JITCode_h
#include <wtf/Platform.h>
#if ENABLE(JIT)
#include "CallFrame.h"
#include "JSValue.h"
#include "Profiler.h"
namespace JSC {
class JSGlobalData;
class RegisterFile;
extern "C" {
JSValueEncodedAsPointer* ctiTrampoline(
#if PLATFORM(X86_64)
// FIXME: (bug #22910) this will force all arguments onto the stack (regparm(0) does not appear to have any effect).
// We can allow register passing here, and move the writes of these values into the trampoline.
void*, void*, void*, void*, void*, void*,
#endif
void* code, RegisterFile*, CallFrame*, JSValuePtr* exception, Profiler**, JSGlobalData*);
};
class JITCode {
public:
JITCode(void* code)
: code(code)
{
}
operator bool()
{
return code != 0;
}
void* addressForCall()
{
return code;
}
// This function returns the offset in bytes of 'pointerIntoCode' into
// this block of code. The pointer provided must be a pointer into this
// block of code. It is ASSERTed that no codeblock >4gb in size.
unsigned offsetOf(void* pointerIntoCode)
{
intptr_t result = reinterpret_cast<intptr_t>(pointerIntoCode) - reinterpret_cast<intptr_t>(code);
ASSERT(static_cast<intptr_t>(static_cast<unsigned>(result)) == result);
return static_cast<unsigned>(result);
}
// Execute the code!
inline JSValuePtr execute(RegisterFile* registerFile, CallFrame* callFrame, JSGlobalData* globalData, JSValuePtr* exception)
{
return JSValuePtr::decode(ctiTrampoline(
#if PLATFORM(X86_64)
0, 0, 0, 0, 0, 0,
#endif
code, registerFile, callFrame, exception, Profiler::enabledProfilerReference(), globalData));
}
private:
void* code;
};
};
#endif
#endif
|
