1/*
2 * Copyright (C) 2013-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "CommonSlowPaths.h"
29#include "MacroAssemblerCodeRef.h"
30
31#if ENABLE(JIT)
32
33namespace JSC {
34
35class JITSlowPathCall {
36public:
37 JITSlowPathCall(JIT* jit, const Instruction* pc, SlowPathFunction slowPathFunction)
38 : m_jit(jit)
39 , m_slowPathFunction(slowPathFunction)
40 , m_pc(pc)
41 {
42 assertIsCFunctionPtr(slowPathFunction);
43 }
44
45 JIT::Call call()
46 {
47#if ENABLE(OPCODE_SAMPLING)
48 if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
49 m_jit->sampleInstruction(&m_jit->m_codeBlock->instructions()[m_jit->m_bytecodeOffset], true);
50#endif
51 m_jit->updateTopCallFrame();
52#if CPU(X86_64) && OS(WINDOWS)
53 m_jit->addPtr(MacroAssembler::TrustedImm32(-16), MacroAssembler::stackPointerRegister);
54 m_jit->move(MacroAssembler::stackPointerRegister, JIT::argumentGPR0);
55 m_jit->move(JIT::callFrameRegister, JIT::argumentGPR1);
56 m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR2);
57#else
58 m_jit->move(JIT::callFrameRegister, JIT::argumentGPR0);
59 m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR1);
60#endif
61 JIT::Call call = m_jit->call(OperationPtrTag);
62 m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeIndex, FunctionPtr<OperationPtrTag>(m_slowPathFunction)));
63
64#if CPU(X86_64) && OS(WINDOWS)
65 m_jit->pop(JIT::regT0); // vPC
66 m_jit->pop(JIT::regT1); // callFrame register
67#endif
68
69#if ENABLE(OPCODE_SAMPLING)
70 if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
71 m_jit->sampleInstruction(&m_jit->m_codeBlock->instructions()[m_jit->m_bytecodeOffset], false);
72#endif
73
74 m_jit->exceptionCheck();
75 return call;
76 }
77
78private:
79 JIT* m_jit;
80 SlowPathFunction m_slowPathFunction;
81 const Instruction* m_pc;
82};
83
84} // namespace JS
85
86#endif // ENABLE(JIT)
87