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) && USE(JSVALUE32_64)
53 m_jit->addPtr(MacroAssembler::TrustedImm32(-8), MacroAssembler::stackPointerRegister);
54 m_jit->push(JIT::TrustedImm32(JIT::TrustedImmPtr(m_pc)));
55 m_jit->push(JIT::callFrameRegister);
56#elif CPU(X86_64) && OS(WINDOWS)
57 m_jit->addPtr(MacroAssembler::TrustedImm32(-16), MacroAssembler::stackPointerRegister);
58 m_jit->move(MacroAssembler::stackPointerRegister, JIT::argumentGPR0);
59 m_jit->move(JIT::callFrameRegister, JIT::argumentGPR1);
60 m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR2);
61#else
62 m_jit->move(JIT::callFrameRegister, JIT::argumentGPR0);
63 m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR1);
64#endif
65 JIT::Call call = m_jit->call(OperationPtrTag);
66 m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeOffset, FunctionPtr<OperationPtrTag>(m_slowPathFunction)));
67
68#if CPU(X86) && USE(JSVALUE32_64)
69 m_jit->addPtr(MacroAssembler::TrustedImm32(16), MacroAssembler::stackPointerRegister);
70#elif CPU(X86_64) && OS(WINDOWS)
71 m_jit->pop(JIT::regT0); // vPC
72 m_jit->pop(JIT::regT1); // callFrame register
73#endif
74
75#if ENABLE(OPCODE_SAMPLING)
76 if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
77 m_jit->sampleInstruction(&m_jit->m_codeBlock->instructions()[m_jit->m_bytecodeOffset], false);
78#endif
79
80 m_jit->exceptionCheck();
81 return call;
82 }
83
84private:
85 JIT* m_jit;
86 SlowPathFunction m_slowPathFunction;
87 const Instruction* m_pc;
88};
89
90} // namespace JS
91
92#endif // ENABLE(JIT)
93