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Commit	Line	Data
81345200 A	1	/*
	2	* Copyright (C) 2013 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	#ifndef SlowPathCall_h
	27	#define SlowPathCall_h
	28
	29	#include "CommonSlowPaths.h"
	30	#include "MacroAssemblerCodeRef.h"
	31
	32	#if ENABLE(JIT)
	33
	34	namespace JSC {
	35
	36	class JITSlowPathCall {
	37	public:
	38	JITSlowPathCall(JIT* jit, Instruction* pc, SlowPathReturnType (SLOW_PATH stub)(ExecState exec, Instruction* pc))
	39	: m_jit(jit)
	40	, m_stub(stub)
	41	, m_pc(pc)
	42	{
	43	}
	44
	45	JIT::Call call()
	46	{
	47	#if ENABLE(OPCODE_SAMPLING)
ed1e77d3	48	if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
81345200 A	49	m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + 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();
	66	m_jit->m_calls.append(CallRecord(call, m_jit->m_bytecodeOffset, m_stub.value()));
	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)
ed1e77d3	76	if (m_jit->m_bytecodeOffset != std::numeric_limits<unsigned>::max())
81345200 A	77	m_jit->sampleInstruction(m_jit->m_codeBlock->instructions().begin() + m_jit->m_bytecodeOffset, false);
	78	#endif
	79
	80	m_jit->exceptionCheck();
	81	return call;
	82	}
	83
	84	private:
	85	JIT* m_jit;
	86	FunctionPtr m_stub;
	87	Instruction* m_pc;
	88	};
	89
	90	} // namespace JS
	91
	92	#endif // ENABLE(JIT)
	93
	94	#endif // SlowPathCall_h