/*
- * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2009, 2010, 2014 Apple Inc. All rights reserved.
* Copyright (C) 2010 University of Szeged
*
* Redistribution and use in source and binary forms, with or without
namespace JSC {
-class MacroAssemblerARMv7 : public AbstractMacroAssembler<ARMv7Assembler> {
- // FIXME: switch dataTempRegister & addressTempRegister, or possibly use r7?
- // - dTR is likely used more than aTR, and we'll get better instruction
- // encoding if it's in the low 8 registers.
+class MacroAssemblerARMv7 : public AbstractMacroAssembler<ARMv7Assembler, MacroAssemblerARMv7> {
static const RegisterID dataTempRegister = ARMRegisters::ip;
- static const RegisterID addressTempRegister = ARMRegisters::r3;
+ static const RegisterID addressTempRegister = ARMRegisters::r6;
static const ARMRegisters::FPDoubleRegisterID fpTempRegister = ARMRegisters::d7;
inline ARMRegisters::FPSingleRegisterID fpTempRegisterAsSingle() { return ARMRegisters::asSingle(fpTempRegister); }
typedef ARMv7Assembler::LinkRecord LinkRecord;
typedef ARMv7Assembler::JumpType JumpType;
typedef ARMv7Assembler::JumpLinkType JumpLinkType;
- // Magic number is the biggest useful offset we can get on ARMv7 with
- // a LDR_imm_T2 encoding
- static const int MaximumCompactPtrAlignedAddressOffset = 124;
-
- Vector<LinkRecord>& jumpsToLink() { return m_assembler.jumpsToLink(); }
+ typedef ARMv7Assembler::Condition Condition;
+
+ static const ARMv7Assembler::Condition DefaultCondition = ARMv7Assembler::ConditionInvalid;
+ static const ARMv7Assembler::JumpType DefaultJump = ARMv7Assembler::JumpNoConditionFixedSize;
+
+ static bool isCompactPtrAlignedAddressOffset(ptrdiff_t value)
+ {
+ return value >= -255 && value <= 255;
+ }
+
+ Vector<LinkRecord, 0, UnsafeVectorOverflow>& jumpsToLink() { return m_assembler.jumpsToLink(); }
void* unlinkedCode() { return m_assembler.unlinkedCode(); }
- bool canCompact(JumpType jumpType) { return m_assembler.canCompact(jumpType); }
- JumpLinkType computeJumpType(JumpType jumpType, const uint8_t* from, const uint8_t* to) { return m_assembler.computeJumpType(jumpType, from, to); }
- JumpLinkType computeJumpType(LinkRecord& record, const uint8_t* from, const uint8_t* to) { return m_assembler.computeJumpType(record, from, to); }
- void recordLinkOffsets(int32_t regionStart, int32_t regionEnd, int32_t offset) {return m_assembler.recordLinkOffsets(regionStart, regionEnd, offset); }
- int jumpSizeDelta(JumpType jumpType, JumpLinkType jumpLinkType) { return m_assembler.jumpSizeDelta(jumpType, jumpLinkType); }
- void link(LinkRecord& record, uint8_t* from, uint8_t* to) { return m_assembler.link(record, from, to); }
+ static bool canCompact(JumpType jumpType) { return ARMv7Assembler::canCompact(jumpType); }
+ static JumpLinkType computeJumpType(JumpType jumpType, const uint8_t* from, const uint8_t* to) { return ARMv7Assembler::computeJumpType(jumpType, from, to); }
+ static JumpLinkType computeJumpType(LinkRecord& record, const uint8_t* from, const uint8_t* to) { return ARMv7Assembler::computeJumpType(record, from, to); }
+ static int jumpSizeDelta(JumpType jumpType, JumpLinkType jumpLinkType) { return ARMv7Assembler::jumpSizeDelta(jumpType, jumpLinkType); }
+ static void link(LinkRecord& record, uint8_t* from, uint8_t* to) { return ARMv7Assembler::link(record, from, to); }
struct ArmAddress {
enum AddressType {
};
public:
- typedef ARMRegisters::FPDoubleRegisterID FPRegisterID;
-
static const Scale ScalePtr = TimesFour;
enum RelationalCondition {
enum ResultCondition {
Overflow = ARMv7Assembler::ConditionVS,
Signed = ARMv7Assembler::ConditionMI,
+ PositiveOrZero = ARMv7Assembler::ConditionPL,
Zero = ARMv7Assembler::ConditionEQ,
NonZero = ARMv7Assembler::ConditionNE
};
};
static const RegisterID stackPointerRegister = ARMRegisters::sp;
+ static const RegisterID framePointerRegister = ARMRegisters::fp;
static const RegisterID linkRegister = ARMRegisters::lr;
// Integer arithmetic operations:
{
add32(imm, dest, dest);
}
+
+ void add32(AbsoluteAddress src, RegisterID dest)
+ {
+ load32(src.m_ptr, dataTempRegister);
+ add32(dataTempRegister, dest);
+ }
void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
{
ARMThumbImmediate armImm = ARMThumbImmediate::makeUInt12OrEncodedImm(imm.m_value);
+
+ // For adds with stack pointer destination, moving the src first to sp is
+ // needed to avoid unpredictable instruction
+ if (dest == ARMRegisters::sp && src != dest) {
+ move(src, ARMRegisters::sp);
+ src = ARMRegisters::sp;
+ }
+
if (armImm.isValid())
m_assembler.add(dest, src, armImm);
else {
store32(dataTempRegister, address.m_ptr);
}
+ void addPtrNoFlags(TrustedImm32 imm, RegisterID srcDest)
+ {
+ add32(imm, srcDest);
+ }
+
void add64(TrustedImm32 imm, AbsoluteAddress address)
{
move(TrustedImmPtr(address.m_ptr), addressTempRegister);
and32(imm, dest, dest);
}
+ void and32(Address src, RegisterID dest)
+ {
+ load32(src, dataTempRegister);
+ and32(dataTempRegister, dest);
+ }
+
void countLeadingZeros32(RegisterID src, RegisterID dest)
{
m_assembler.clz(dest, src);
{
m_assembler.orr(dest, dest, src);
}
+
+ void or32(RegisterID src, AbsoluteAddress dest)
+ {
+ move(TrustedImmPtr(dest.m_ptr), addressTempRegister);
+ load32(addressTempRegister, dataTempRegister);
+ or32(src, dataTempRegister);
+ store32(dataTempRegister, addressTempRegister);
+ }
+
+ void or32(TrustedImm32 imm, Address address)
+ {
+ load32(address, dataTempRegister);
+ or32(imm, dataTempRegister, dataTempRegister);
+ store32(dataTempRegister, address);
+ }
void or32(TrustedImm32 imm, RegisterID dest)
{
}
}
- void load16Signed(ArmAddress address, RegisterID dest)
+ void load16SignedExtendTo32(ArmAddress address, RegisterID dest)
{
ASSERT(address.type == ArmAddress::HasIndex);
m_assembler.ldrsh(dest, address.base, address.u.index, address.u.scale);
}
}
- void load8Signed(ArmAddress address, RegisterID dest)
+ void load8SignedExtendTo32(ArmAddress address, RegisterID dest)
{
ASSERT(address.type == ArmAddress::HasIndex);
m_assembler.ldrsb(dest, address.base, address.u.index, address.u.scale);
move(TrustedImmPtr(address), addressTempRegister);
m_assembler.ldr(dest, addressTempRegister, ARMThumbImmediate::makeUInt16(0));
}
+
+ void abortWithReason(AbortReason reason)
+ {
+ move(TrustedImm32(reason), dataTempRegister);
+ breakpoint();
+ }
+
+ void abortWithReason(AbortReason reason, intptr_t misc)
+ {
+ move(TrustedImm32(misc), addressTempRegister);
+ abortWithReason(reason);
+ }
+
+ ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest)
+ {
+ ConvertibleLoadLabel result(this);
+ ASSERT(address.offset >= 0 && address.offset <= 255);
+ m_assembler.ldrWide8BitImmediate(dest, address.base, address.offset);
+ return result;
+ }
void load8(ImplicitAddress address, RegisterID dest)
{
load8(setupArmAddress(address), dest);
}
- void load8Signed(ImplicitAddress, RegisterID)
+ void load8SignedExtendTo32(ImplicitAddress, RegisterID)
{
- unreachableForPlatform();
+ UNREACHABLE_FOR_PLATFORM();
}
void load8(BaseIndex address, RegisterID dest)
load8(setupArmAddress(address), dest);
}
- void load8Signed(BaseIndex address, RegisterID dest)
+ void load8SignedExtendTo32(BaseIndex address, RegisterID dest)
+ {
+ load8SignedExtendTo32(setupArmAddress(address), dest);
+ }
+
+ void load8(const void* address, RegisterID dest)
{
- load8Signed(setupArmAddress(address), dest);
+ move(TrustedImmPtr(address), dest);
+ load8(dest, dest);
}
DataLabel32 load32WithAddressOffsetPatch(Address address, RegisterID dest)
return label;
}
- // FIXME: we should be able to plant a compact load relative to/from any base/dest register.
DataLabelCompact load32WithCompactAddressOffsetPatch(Address address, RegisterID dest)
{
+ padBeforePatch();
+
RegisterID base = address.base;
- if (base >= ARMRegisters::r8) {
- move(base, addressTempRegister);
- base = addressTempRegister;
- }
-
DataLabelCompact label(this);
- ASSERT(address.offset >= 0);
- ASSERT(address.offset <= MaximumCompactPtrAlignedAddressOffset);
- ASSERT(ARMThumbImmediate::makeUInt12(address.offset).isUInt7());
+ ASSERT(isCompactPtrAlignedAddressOffset(address.offset));
- if (dest >= ARMRegisters::r8) {
- m_assembler.ldrCompact(addressTempRegister, base, ARMThumbImmediate::makeUInt12(address.offset));
- move(addressTempRegister, dest);
- } else
- m_assembler.ldrCompact(dest, base, ARMThumbImmediate::makeUInt12(address.offset));
+ m_assembler.ldr(dest, base, address.offset, true, false);
return label;
}
m_assembler.ldrh(dest, makeBaseIndexBase(address), address.index, address.scale);
}
- void load16Signed(BaseIndex address, RegisterID dest)
+ void load16SignedExtendTo32(BaseIndex address, RegisterID dest)
{
- load16Signed(setupArmAddress(address), dest);
+ load16SignedExtendTo32(setupArmAddress(address), dest);
}
void load16(ImplicitAddress address, RegisterID dest)
}
}
- void load16Signed(ImplicitAddress, RegisterID)
+ void load16SignedExtendTo32(ImplicitAddress, RegisterID)
{
- unreachableForPlatform();
+ UNREACHABLE_FOR_PLATFORM();
}
DataLabel32 store32WithAddressOffsetPatch(RegisterID src, Address address)
store32(dataTempRegister, address);
}
+ void store8(RegisterID src, Address address)
+ {
+ store8(src, setupArmAddress(address));
+ }
+
void store8(RegisterID src, BaseIndex address)
{
store8(src, setupArmAddress(address));
}
+ void store8(RegisterID src, void* address)
+ {
+ move(TrustedImmPtr(address), addressTempRegister);
+ store8(src, ArmAddress(addressTempRegister, 0));
+ }
+
+ void store8(TrustedImm32 imm, void* address)
+ {
+ move(imm, dataTempRegister);
+ store8(dataTempRegister, address);
+ }
+
+ void store8(TrustedImm32 imm, Address address)
+ {
+ move(imm, dataTempRegister);
+ store8(dataTempRegister, address);
+ }
+
void store16(RegisterID src, BaseIndex address)
{
store16(src, setupArmAddress(address));
}
-#if ENABLE(JIT_CONSTANT_BLINDING)
+ // Possibly clobbers src, but not on this architecture.
+ void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2)
+ {
+ m_assembler.vmov(dest1, dest2, src);
+ }
+
+ void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch)
+ {
+ UNUSED_PARAM(scratch);
+ m_assembler.vmov(dest, src1, src2);
+ }
+
static bool shouldBlindForSpecificArch(uint32_t value)
{
ARMThumbImmediate immediate = ARMThumbImmediate::makeEncodedImm(value);
// be controlled by an attacker.
return !immediate.isUInt12();
}
-#endif
// Floating-point operations:
m_assembler.vmov(dest, src);
}
- void loadDouble(const void* address, FPRegisterID dest)
+ void loadDouble(TrustedImmPtr address, FPRegisterID dest)
{
- move(TrustedImmPtr(address), addressTempRegister);
+ move(address, addressTempRegister);
m_assembler.vldr(dest, addressTempRegister, 0);
}
m_assembler.fsts(ARMRegisters::asSingle(src), base, offset);
}
- void storeDouble(FPRegisterID src, const void* address)
+ void storeDouble(FPRegisterID src, TrustedImmPtr address)
{
- move(TrustedImmPtr(address), addressTempRegister);
+ move(address, addressTempRegister);
storeDouble(src, addressTempRegister);
}
void addDouble(AbsoluteAddress address, FPRegisterID dest)
{
- loadDouble(address.m_ptr, fpTempRegister);
+ loadDouble(TrustedImmPtr(address.m_ptr), fpTempRegister);
m_assembler.vadd(dest, dest, fpTempRegister);
}
return failure;
}
- Jump branchTruncateDoubleToUint32(FPRegisterID src, RegisterID dest, BranchTruncateType branchType = BranchIfTruncateFailed)
- {
- m_assembler.vcvt_floatingPointToSigned(fpTempRegisterAsSingle(), src);
- m_assembler.vmov(dest, fpTempRegisterAsSingle());
-
- Jump overflow = branch32(Equal, dest, TrustedImm32(0x7fffffff));
- Jump success = branch32(GreaterThanOrEqual, dest, TrustedImm32(0));
- overflow.link(this);
-
- if (branchType == BranchIfTruncateSuccessful)
- return success;
-
- Jump failure = jump();
- success.link(this);
- return failure;
- }
-
// Result is undefined if the value is outside of the integer range.
void truncateDoubleToInt32(FPRegisterID src, RegisterID dest)
{
// If the result is not representable as a 32 bit value, branch.
// May also branch for some values that are representable in 32 bits
// (specifically, in this case, 0).
- void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID)
+ void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID, bool negZeroCheck = true)
{
m_assembler.vcvt_floatingPointToSigned(fpTempRegisterAsSingle(), src);
m_assembler.vmov(dest, fpTempRegisterAsSingle());
failureCases.append(branchDouble(DoubleNotEqualOrUnordered, src, fpTempRegister));
// If the result is zero, it might have been -0.0, and the double comparison won't catch this!
- failureCases.append(branchTest32(Zero, dest));
+ if (negZeroCheck)
+ failureCases.append(branchTest32(Zero, dest));
}
Jump branchDoubleNonZero(FPRegisterID reg, FPRegisterID)
void pop(RegisterID dest)
{
- // store postindexed with writeback
- m_assembler.ldr(dest, ARMRegisters::sp, sizeof(void*), false, true);
+ m_assembler.pop(dest);
}
void push(RegisterID src)
{
- // store preindexed with writeback
- m_assembler.str(src, ARMRegisters::sp, -sizeof(void*), true, true);
+ m_assembler.push(src);
}
void push(Address address)
push(dataTempRegister);
}
+ void popPair(RegisterID dest1, RegisterID dest2)
+ {
+ m_assembler.pop(1 << dest1 | 1 << dest2);
+ }
+
+ void pushPair(RegisterID src1, RegisterID src2)
+ {
+ m_assembler.push(1 << src1 | 1 << src2);
+ }
+
// Register move operations:
//
// Move values in registers.
{
uint32_t value = imm.m_value;
- if (imm.m_isPointer)
- moveFixedWidthEncoding(imm, dest);
- else {
- ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(value);
+ ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(value);
- if (armImm.isValid())
- m_assembler.mov(dest, armImm);
- else if ((armImm = ARMThumbImmediate::makeEncodedImm(~value)).isValid())
- m_assembler.mvn(dest, armImm);
- else {
- m_assembler.mov(dest, ARMThumbImmediate::makeUInt16(value));
- if (value & 0xffff0000)
- m_assembler.movt(dest, ARMThumbImmediate::makeUInt16(value >> 16));
- }
+ if (armImm.isValid())
+ m_assembler.mov(dest, armImm);
+ else if ((armImm = ARMThumbImmediate::makeEncodedImm(~value)).isValid())
+ m_assembler.mvn(dest, armImm);
+ else {
+ m_assembler.mov(dest, ARMThumbImmediate::makeUInt16(value));
+ if (value & 0xffff0000)
+ m_assembler.movt(dest, ARMThumbImmediate::makeUInt16(value >> 16));
}
}
{
m_assembler.nop();
}
+
+ void memoryFence()
+ {
+ m_assembler.dmbSY();
+ }
+
+ static void replaceWithJump(CodeLocationLabel instructionStart, CodeLocationLabel destination)
+ {
+ ARMv7Assembler::replaceWithJump(instructionStart.dataLocation(), destination.dataLocation());
+ }
+
+ static ptrdiff_t maxJumpReplacementSize()
+ {
+ return ARMv7Assembler::maxJumpReplacementSize();
+ }
// Forwards / external control flow operations:
//
void compare32(RegisterID left, TrustedImm32 right)
{
int32_t imm = right.m_value;
- if (!imm)
- m_assembler.tst(left, left);
+ ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(imm);
+ if (armImm.isValid())
+ m_assembler.cmp(left, armImm);
+ else if ((armImm = ARMThumbImmediate::makeEncodedImm(-imm)).isValid())
+ m_assembler.cmn(left, armImm);
else {
- ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(imm);
- if (armImm.isValid())
- m_assembler.cmp(left, armImm);
- else if ((armImm = ARMThumbImmediate::makeEncodedImm(-imm)).isValid())
- m_assembler.cmn(left, armImm);
- else {
- move(TrustedImm32(imm), dataTempRegister);
- m_assembler.cmp(left, dataTempRegister);
- }
+ move(TrustedImm32(imm), dataTempRegister);
+ m_assembler.cmp(left, dataTempRegister);
}
}
m_assembler.tst(reg, reg);
else {
ARMThumbImmediate armImm = ARMThumbImmediate::makeEncodedImm(imm);
- if (armImm.isValid())
- m_assembler.tst(reg, armImm);
- else {
+ if (armImm.isValid()) {
+ if (reg == ARMRegisters::sp) {
+ move(reg, addressTempRegister);
+ m_assembler.tst(addressTempRegister, armImm);
+ } else
+ m_assembler.tst(reg, armImm);
+ } else {
move(mask, dataTempRegister);
- m_assembler.tst(reg, dataTempRegister);
+ if (reg == ARMRegisters::sp) {
+ move(reg, addressTempRegister);
+ m_assembler.tst(addressTempRegister, dataTempRegister);
+ } else
+ m_assembler.tst(reg, dataTempRegister);
}
}
}
public:
+ void test32(ResultCondition, RegisterID reg, TrustedImm32 mask)
+ {
+ test32(reg, mask);
+ }
+
+ Jump branch(ResultCondition cond)
+ {
+ return Jump(makeBranch(cond));
+ }
+
Jump branch32(RelationalCondition cond, RegisterID left, RegisterID right)
{
m_assembler.cmp(left, right);
return branch32(cond, addressTempRegister, right);
}
+ Jump branchPtr(RelationalCondition cond, BaseIndex left, RegisterID right)
+ {
+ load32(left, dataTempRegister);
+ return branch32(cond, dataTempRegister, right);
+ }
+
Jump branch8(RelationalCondition cond, RegisterID left, TrustedImm32 right)
{
compare32(left, right);
return branch32(cond, addressTempRegister, right);
}
+ Jump branch8(RelationalCondition cond, AbsoluteAddress address, TrustedImm32 right)
+ {
+ // Use addressTempRegister instead of dataTempRegister, since branch32 uses dataTempRegister.
+ move(TrustedImmPtr(address.m_ptr), addressTempRegister);
+ load8(Address(addressTempRegister), addressTempRegister);
+ return branch32(cond, addressTempRegister, right);
+ }
+
Jump branchTest32(ResultCondition cond, RegisterID reg, RegisterID mask)
{
m_assembler.tst(reg, mask);
return branchTest32(cond, addressTempRegister, mask);
}
+ Jump branchTest8(ResultCondition cond, BaseIndex address, TrustedImm32 mask = TrustedImm32(-1))
+ {
+ // use addressTempRegister incase the branchTest8 we call uses dataTempRegister. :-/
+ load8(address, addressTempRegister);
+ return branchTest32(cond, addressTempRegister, mask);
+ }
+
Jump branchTest8(ResultCondition cond, Address address, TrustedImm32 mask = TrustedImm32(-1))
{
// use addressTempRegister incase the branchTest8 we call uses dataTempRegister. :-/
return branchTest32(cond, addressTempRegister, mask);
}
+ Jump branchTest8(ResultCondition cond, AbsoluteAddress address, TrustedImm32 mask = TrustedImm32(-1))
+ {
+ // use addressTempRegister incase the branchTest8 we call uses dataTempRegister. :-/
+ move(TrustedImmPtr(address.m_ptr), addressTempRegister);
+ load8(Address(addressTempRegister), addressTempRegister);
+ return branchTest32(cond, addressTempRegister, mask);
+ }
+
void jump(RegisterID target)
{
m_assembler.bx(target);
return branchAdd32(cond, dest, src, dest);
}
+ Jump branchAdd32(ResultCondition cond, Address src, RegisterID dest)
+ {
+ load32(src, dataTempRegister);
+ return branchAdd32(cond, dest, dataTempRegister, dest);
+ }
+
Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, RegisterID dest)
{
return branchAdd32(cond, dest, imm, dest);
ALWAYS_INLINE DataLabel32 moveWithPatch(TrustedImm32 imm, RegisterID dst)
{
+ padBeforePatch();
moveFixedWidthEncoding(imm, dst);
return DataLabel32(this);
}
ALWAYS_INLINE DataLabelPtr moveWithPatch(TrustedImmPtr imm, RegisterID dst)
{
+ padBeforePatch();
moveFixedWidthEncoding(TrustedImm32(imm), dst);
return DataLabelPtr(this);
}
dataLabel = moveWithPatch(initialRightValue, dataTempRegister);
return branch32(cond, addressTempRegister, dataTempRegister);
}
+
+ ALWAYS_INLINE Jump branch32WithPatch(RelationalCondition cond, Address left, DataLabel32& dataLabel, TrustedImm32 initialRightValue = TrustedImm32(0))
+ {
+ load32(left, addressTempRegister);
+ dataLabel = moveWithPatch(initialRightValue, dataTempRegister);
+ return branch32(cond, addressTempRegister, dataTempRegister);
+ }
+
+ PatchableJump patchableBranchPtr(RelationalCondition cond, Address left, TrustedImmPtr right = TrustedImmPtr(0))
+ {
+ m_makeJumpPatchable = true;
+ Jump result = branch32(cond, left, TrustedImm32(right));
+ m_makeJumpPatchable = false;
+ return PatchableJump(result);
+ }
+
+ PatchableJump patchableBranchTest32(ResultCondition cond, RegisterID reg, TrustedImm32 mask = TrustedImm32(-1))
+ {
+ m_makeJumpPatchable = true;
+ Jump result = branchTest32(cond, reg, mask);
+ m_makeJumpPatchable = false;
+ return PatchableJump(result);
+ }
+
+ PatchableJump patchableBranch32(RelationalCondition cond, RegisterID reg, TrustedImm32 imm)
+ {
+ m_makeJumpPatchable = true;
+ Jump result = branch32(cond, reg, imm);
+ m_makeJumpPatchable = false;
+ return PatchableJump(result);
+ }
PatchableJump patchableBranchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
{
return PatchableJump(result);
}
+ PatchableJump patchableBranch32WithPatch(RelationalCondition cond, Address left, DataLabel32& dataLabel, TrustedImm32 initialRightValue = TrustedImm32(0))
+ {
+ m_makeJumpPatchable = true;
+ Jump result = branch32WithPatch(cond, left, dataLabel, initialRightValue);
+ m_makeJumpPatchable = false;
+ return PatchableJump(result);
+ }
+
PatchableJump patchableJump()
{
+ padBeforePatch();
m_makeJumpPatchable = true;
Jump result = jump();
m_makeJumpPatchable = false;
}
- int executableOffsetFor(int location)
+ static FunctionPtr readCallTarget(CodeLocationCall call)
{
- return m_assembler.executableOffsetFor(location);
+ return FunctionPtr(reinterpret_cast<void(*)()>(ARMv7Assembler::readCallTarget(call.dataLocation())));
+ }
+
+ static bool canJumpReplacePatchableBranchPtrWithPatch() { return false; }
+ static bool canJumpReplacePatchableBranch32WithPatch() { return false; }
+
+ static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label)
+ {
+ const unsigned twoWordOpSize = 4;
+ return label.labelAtOffset(-twoWordOpSize * 2);
+ }
+
+ static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, RegisterID rd, void* initialValue)
+ {
+#if OS(LINUX)
+ ARMv7Assembler::revertJumpTo_movT3movtcmpT2(instructionStart.dataLocation(), rd, dataTempRegister, reinterpret_cast<uintptr_t>(initialValue));
+#else
+ UNUSED_PARAM(rd);
+ ARMv7Assembler::revertJumpTo_movT3(instructionStart.dataLocation(), dataTempRegister, ARMThumbImmediate::makeUInt16(reinterpret_cast<uintptr_t>(initialValue) & 0xffff));
+#endif
+ }
+
+ static CodeLocationLabel startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr)
+ {
+ UNREACHABLE_FOR_PLATFORM();
+ return CodeLocationLabel();
+ }
+
+ static CodeLocationLabel startOfPatchableBranch32WithPatchOnAddress(CodeLocationDataLabel32)
+ {
+ UNREACHABLE_FOR_PLATFORM();
+ return CodeLocationLabel();
+ }
+
+ static void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel, Address, void*)
+ {
+ UNREACHABLE_FOR_PLATFORM();
}
- static FunctionPtr readCallTarget(CodeLocationCall call)
+ static void revertJumpReplacementToPatchableBranch32WithPatch(CodeLocationLabel, Address, int32_t)
{
- return FunctionPtr(reinterpret_cast<void(*)()>(ARMv7Assembler::readCallTarget(call.dataLocation())));
+ UNREACHABLE_FOR_PLATFORM();
}
+#if ENABLE(MASM_PROBE)
+ // Methods required by the MASM_PROBE mechanism as defined in
+ // AbstractMacroAssembler.h.
+ static void printCPURegisters(CPUState&, int indentation = 0);
+ static void printRegister(CPUState&, RegisterID);
+ static void printRegister(CPUState&, FPRegisterID);
+ void probe(ProbeFunction, void* arg1 = 0, void* arg2 = 0);
+#endif // ENABLE(MASM_PROBE)
+
protected:
ALWAYS_INLINE Jump jump()
{
+ m_assembler.label(); // Force nop-padding if we're in the middle of a watchpoint.
moveFixedWidthEncoding(TrustedImm32(0), dataTempRegister);
return Jump(m_assembler.bx(dataTempRegister), m_makeJumpPatchable ? ARMv7Assembler::JumpNoConditionFixedSize : ARMv7Assembler::JumpNoCondition);
}
ALWAYS_INLINE Jump makeBranch(ARMv7Assembler::Condition cond)
{
+ m_assembler.label(); // Force nop-padding if we're in the middle of a watchpoint.
m_assembler.it(cond, true, true);
moveFixedWidthEncoding(TrustedImm32(0), dataTempRegister);
return Jump(m_assembler.bx(dataTempRegister), m_makeJumpPatchable ? ARMv7Assembler::JumpConditionFixedSize : ARMv7Assembler::JumpCondition, cond);
ARMv7Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
}
+#if ENABLE(MASM_PROBE)
+ inline TrustedImm32 trustedImm32FromPtr(void* ptr)
+ {
+ return TrustedImm32(TrustedImmPtr(ptr));
+ }
+
+ inline TrustedImm32 trustedImm32FromPtr(ProbeFunction function)
+ {
+ return TrustedImm32(TrustedImmPtr(reinterpret_cast<void*>(function)));
+ }
+
+ inline TrustedImm32 trustedImm32FromPtr(void (*function)())
+ {
+ return TrustedImm32(TrustedImmPtr(reinterpret_cast<void*>(function)));
+ }
+#endif
+
bool m_makeJumpPatchable;
};
projects / apple / javascriptcore.git / blobdiff