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/*
* Copyright (C) 2011-2018 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.
*/
#pragma once
#include "GPRInfo.h"
#include "Instruction.h"
#include "JSCJSValue.h"
#include "MacroAssemblerCodeRef.h"
#include "Opcode.h"
namespace JSC {
class VM;
#if ENABLE(C_LOOP)
typedef OpcodeID LLIntCode;
#else
typedef void (*LLIntCode)();
#endif
namespace LLInt {
extern "C" JS_EXPORT_PRIVATE Opcode g_opcodeMap[numOpcodeIDs];
extern "C" JS_EXPORT_PRIVATE Opcode g_opcodeMapWide16[numOpcodeIDs];
extern "C" JS_EXPORT_PRIVATE Opcode g_opcodeMapWide32[numOpcodeIDs];
class Data {
public:
static void performAssertions(VM&);
private:
static uint8_t s_exceptionInstructions[maxOpcodeLength + 1];
friend void initialize();
friend Instruction* exceptionInstructions();
friend Opcode* opcodeMap();
friend Opcode* opcodeMapWide16();
friend Opcode* opcodeMapWide32();
friend Opcode getOpcode(OpcodeID);
friend Opcode getOpcodeWide16(OpcodeID);
friend Opcode getOpcodeWide32(OpcodeID);
template<PtrTag tag> friend MacroAssemblerCodePtr<tag> getCodePtr(OpcodeID);
template<PtrTag tag> friend MacroAssemblerCodePtr<tag> getWide16CodePtr(OpcodeID);
template<PtrTag tag> friend MacroAssemblerCodePtr<tag> getWide32CodePtr(OpcodeID);
template<PtrTag tag> friend MacroAssemblerCodeRef<tag> getCodeRef(OpcodeID);
};
void initialize();
inline Instruction* exceptionInstructions()
{
return reinterpret_cast<Instruction*>(Data::s_exceptionInstructions);
}
inline Opcode* opcodeMap()
{
return g_opcodeMap;
}
inline Opcode* opcodeMapWide16()
{
return g_opcodeMapWide16;
}
inline Opcode* opcodeMapWide32()
{
return g_opcodeMapWide32;
}
inline Opcode getOpcode(OpcodeID id)
{
#if ENABLE(COMPUTED_GOTO_OPCODES)
return g_opcodeMap[id];
#else
return static_cast<Opcode>(id);
#endif
}
inline Opcode getOpcodeWide16(OpcodeID id)
{
#if ENABLE(COMPUTED_GOTO_OPCODES)
return g_opcodeMapWide16[id];
#else
UNUSED_PARAM(id);
RELEASE_ASSERT_NOT_REACHED();
#endif
}
inline Opcode getOpcodeWide32(OpcodeID id)
{
#if ENABLE(COMPUTED_GOTO_OPCODES)
return g_opcodeMapWide32[id];
#else
UNUSED_PARAM(id);
RELEASE_ASSERT_NOT_REACHED();
#endif
}
template<PtrTag tag>
ALWAYS_INLINE MacroAssemblerCodePtr<tag> getCodePtr(OpcodeID opcodeID)
{
void* address = reinterpret_cast<void*>(getOpcode(opcodeID));
address = retagCodePtr<BytecodePtrTag, tag>(address);
return MacroAssemblerCodePtr<tag>::createFromExecutableAddress(address);
}
template<PtrTag tag>
ALWAYS_INLINE MacroAssemblerCodePtr<tag> getWide16CodePtr(OpcodeID opcodeID)
{
void* address = reinterpret_cast<void*>(getOpcodeWide16(opcodeID));
address = retagCodePtr<BytecodePtrTag, tag>(address);
return MacroAssemblerCodePtr<tag>::createFromExecutableAddress(address);
}
template<PtrTag tag>
ALWAYS_INLINE MacroAssemblerCodePtr<tag> getWide32CodePtr(OpcodeID opcodeID)
{
void* address = reinterpret_cast<void*>(getOpcodeWide32(opcodeID));
address = retagCodePtr<BytecodePtrTag, tag>(address);
return MacroAssemblerCodePtr<tag>::createFromExecutableAddress(address);
}
template<PtrTag tag>
ALWAYS_INLINE MacroAssemblerCodePtr<tag> getCodePtr(const Instruction& instruction)
{
if (instruction.isWide16())
return getWide16CodePtr<tag>(instruction.opcodeID());
if (instruction.isWide32())
return getWide32CodePtr<tag>(instruction.opcodeID());
return getCodePtr<tag>(instruction.opcodeID());
}
template<PtrTag tag>
ALWAYS_INLINE MacroAssemblerCodeRef<tag> getCodeRef(OpcodeID opcodeID)
{
return MacroAssemblerCodeRef<tag>::createSelfManagedCodeRef(getCodePtr<tag>(opcodeID));
}
#if ENABLE(JIT)
template<PtrTag tag>
ALWAYS_INLINE LLIntCode getCodeFunctionPtr(OpcodeID opcodeID)
{
ASSERT(opcodeID >= NUMBER_OF_BYTECODE_IDS);
#if COMPILER(MSVC)
return reinterpret_cast<LLIntCode>(getCodePtr<tag>(opcodeID).executableAddress());
#else
return reinterpret_cast<LLIntCode>(getCodePtr<tag>(opcodeID).template executableAddress());
#endif
}
#else
ALWAYS_INLINE void* getCodePtr(OpcodeID id)
{
return reinterpret_cast<void*>(getOpcode(id));
}
ALWAYS_INLINE void* getWide16CodePtr(OpcodeID id)
{
return reinterpret_cast<void*>(getOpcodeWide16(id));
}
ALWAYS_INLINE void* getWide32CodePtr(OpcodeID id)
{
return reinterpret_cast<void*>(getOpcodeWide32(id));
}
#endif
ALWAYS_INLINE void* getCodePtr(JSC::EncodedJSValue glueHelper())
{
return bitwise_cast<void*>(glueHelper);
}
#if ENABLE(JIT)
struct Registers {
static const GPRReg pcGPR = GPRInfo::regT4;
#if CPU(X86_64) && !OS(WINDOWS)
static const GPRReg metadataTableGPR = GPRInfo::regCS1;
static const GPRReg pbGPR = GPRInfo::regCS2;
#elif CPU(X86_64) && OS(WINDOWS)
static const GPRReg metadataTableGPR = GPRInfo::regCS3;
static const GPRReg pbGPR = GPRInfo::regCS4;
#elif CPU(ARM64)
static const GPRReg metadataTableGPR = GPRInfo::regCS6;
static const GPRReg pbGPR = GPRInfo::regCS7;
#elif CPU(MIPS) || CPU(ARM_THUMB2)
static const GPRReg metadataTableGPR = GPRInfo::regCS0;
#endif
};
#endif
} } // namespace JSC::LLInt