mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
/*
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* Copyright (C) 2013-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CommonSlowPaths.h"
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#include "MacroAssemblerCodeRef.h"
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#if ENABLE(JIT)
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namespace JSC {
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class JITSlowPathCall {
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public:
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JITSlowPathCall(JIT* jit, const Instruction* pc, SlowPathFunction slowPathFunction)
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: m_jit(jit)
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, m_slowPathFunction(slowPathFunction)
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, m_pc(pc)
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{
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assertIsCFunctionPtr(slowPathFunction);
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}
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JIT::Call call()
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{
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#if ENABLE(OPCODE_SAMPLING)
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if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
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m_jit->sampleInstruction(&m_jit->m_codeBlock->instructions()[m_jit->m_bytecodeOffset], true);
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#endif
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m_jit->updateTopCallFrame();
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#if CPU(X86_64) && OS(WINDOWS)
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m_jit->addPtr(MacroAssembler::TrustedImm32(-16), MacroAssembler::stackPointerRegister);
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m_jit->move(MacroAssembler::stackPointerRegister, JIT::argumentGPR0);
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m_jit->move(JIT::callFrameRegister, JIT::argumentGPR1);
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m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR2);
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#else
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m_jit->move(JIT::callFrameRegister, JIT::argumentGPR0);
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m_jit->move(JIT::TrustedImmPtr(m_pc), JIT::argumentGPR1);
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#endif
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JIT::Call call = m_jit->appendCall(m_slowPathFunction);
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#if CPU(X86_64) && OS(WINDOWS)
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m_jit->pop(JIT::regT0); // vPC
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m_jit->pop(JIT::regT1); // callFrame register
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static_assert(JIT::regT0 == GPRInfo::returnValueGPR);
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static_assert(JIT::regT1 == GPRInfo::returnValueGPR2);
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#endif
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#if ENABLE(OPCODE_SAMPLING)
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if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
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m_jit->sampleInstruction(&m_jit->m_codeBlock->instructions()[m_jit->m_bytecodeOffset], false);
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#endif
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m_jit->exceptionCheck();
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return call;
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}
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private:
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JIT* m_jit;
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SlowPathFunction m_slowPathFunction;
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const Instruction* m_pc;
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};
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} // namespace JS
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#endif // ENABLE(JIT)
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