void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction) { unsigned result = currentInstruction[1].u.operand; unsigned thisReg = currentInstruction[2].u.operand; emitLoad(result, regT1, regT0); Jump notJSCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)); loadPtr(Address(regT0, JSCell::structureOffset()), regT2); Jump notObject = emitJumpIfNotObject(regT2); emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); notJSCell.link(this); notObject.link(this); emitLoad(thisReg, regT1, regT0); emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); }
void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction) { unsigned result = currentInstruction[1].u.operand; unsigned thisReg = currentInstruction[2].u.operand; // We could JIT generate the deref, only calling out to C when the refcount hits zero. if (m_codeBlock->needsFullScopeChain()) JITStubCall(this, cti_op_ret_scopeChain).call(); emitLoad(result, regT1, regT0); Jump notJSCell = branch32(NotEqual, regT1, Imm32(JSValue::CellTag)); loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2); Jump notObject = branch8(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo) + OBJECT_OFFSETOF(TypeInfo, m_type)), Imm32(ObjectType)); emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); notJSCell.link(this); notObject.link(this); emitLoad(thisReg, regT1, regT0); emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); }
void JIT::emit_op_ret(Instruction* currentInstruction) { unsigned dst = currentInstruction[1].u.operand; emitLoad(dst, regT1, regT0); emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); }
void JIT::emit_op_ret(Instruction* currentInstruction) { unsigned dst = currentInstruction[1].u.operand; // We could JIT generate the deref, only calling out to C when the refcount hits zero. if (m_codeBlock->needsFullScopeChain()) JITStubCall(this, cti_op_ret_scopeChain).call(); emitLoad(dst, regT1, regT0); emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); ret(); }
void JIT::privateCompileClosureCall(CallLinkInfo* callLinkInfo, CodeBlock* calleeCodeBlock, Structure* expectedStructure, ExecutableBase* expectedExecutable, MacroAssemblerCodePtr codePtr) { JumpList slowCases; slowCases.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag))); slowCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(expectedStructure))); slowCases.append(branchPtr(NotEqual, Address(regT0, JSFunction::offsetOfExecutable()), TrustedImmPtr(expectedExecutable))); loadPtr(Address(regT0, JSFunction::offsetOfScopeChain()), regT1); emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain); Call call = nearCall(); Jump done = jump(); slowCases.link(this); move(TrustedImmPtr(callLinkInfo->callReturnLocation.executableAddress()), regT2); restoreReturnAddressBeforeReturn(regT2); Jump slow = jump(); LinkBuffer patchBuffer(*m_vm, this, m_codeBlock); patchBuffer.link(call, FunctionPtr(codePtr.executableAddress())); patchBuffer.link(done, callLinkInfo->hotPathOther.labelAtOffset(0)); patchBuffer.link(slow, CodeLocationLabel(m_vm->getCTIStub(virtualCallThunkGenerator).code())); RefPtr<ClosureCallStubRoutine> stubRoutine = adoptRef(new ClosureCallStubRoutine( FINALIZE_CODE( patchBuffer, ("Baseline closure call stub for %s, return point %p, target %p (%s)", toCString(*m_codeBlock).data(), callLinkInfo->hotPathOther.labelAtOffset(0).executableAddress(), codePtr.executableAddress(), toCString(pointerDump(calleeCodeBlock)).data())), *m_vm, m_codeBlock->ownerExecutable(), expectedStructure, expectedExecutable, callLinkInfo->codeOrigin)); RepatchBuffer repatchBuffer(m_codeBlock); repatchBuffer.replaceWithJump( RepatchBuffer::startOfBranchPtrWithPatchOnRegister(callLinkInfo->hotPathBegin), CodeLocationLabel(stubRoutine->code().code())); repatchBuffer.relink(callLinkInfo->callReturnLocation, m_vm->getCTIStub(virtualCallThunkGenerator).code()); callLinkInfo->stub = stubRoutine.release(); }
void JIT::emit_op_ret(Instruction* currentInstruction) { unsigned dst = currentInstruction[1].u.operand; // We could JIT generate the deref, only calling out to C when the refcount hits zero. if (m_codeBlock->needsFullScopeChain()) { Jump activationNotCreated = branch32(Equal, tagFor(m_codeBlock->activationRegister()), Imm32(JSValue::EmptyValueTag)); JITStubCall(this, cti_op_ret_scopeChain).call(); activationNotCreated.link(this); } emitLoad(dst, regT1, regT0); #ifdef OPT_SCHED emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regLink); emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister); #else emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2); emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister); restoreReturnAddressBeforeReturn(regT2); #endif ret(); }