// Copyright 2021 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #if V8_TARGET_ARCH_RISCV64 #include "src/api/api-arguments.h" #include "src/codegen/code-factory.h" #include "src/codegen/interface-descriptors-inl.h" #include "src/debug/debug.h" #include "src/deoptimizer/deoptimizer.h" #include "src/execution/frame-constants.h" #include "src/execution/frames.h" #include "src/logging/counters.h" // For interpreter_entry_return_pc_offset. TODO(jkummerow): Drop. #include "src/codegen/macro-assembler-inl.h" #include "src/codegen/register-configuration.h" #include "src/codegen/riscv64/constants-riscv64.h" #include "src/heap/heap-inl.h" #include "src/objects/cell.h" #include "src/objects/foreign.h" #include "src/objects/heap-number.h" #include "src/objects/js-generator.h" #include "src/objects/objects-inl.h" #include "src/objects/smi.h" #include "src/runtime/runtime.h" #include "src/wasm/wasm-linkage.h" #include "src/wasm/wasm-objects.h" namespace v8 { namespace internal { #define __ ACCESS_MASM(masm) void Builtins::Generate_Adaptor(MacroAssembler* masm, Address address) { ASM_CODE_COMMENT(masm); __ li(kJavaScriptCallExtraArg1Register, ExternalReference::Create(address)); __ Jump(BUILTIN_CODE(masm->isolate(), AdaptorWithBuiltinExitFrame), RelocInfo::CODE_TARGET); } static void GenerateTailCallToReturnedCode(MacroAssembler* masm, Runtime::FunctionId function_id) { // ----------- S t a t e ------------- // -- a0 : actual argument count // -- a1 : target function (preserved for callee) // -- a3 : new target (preserved for callee) // ----------------------------------- { FrameScope scope(masm, StackFrame::INTERNAL); // Push a copy of the target function, the new target and the actual // argument count. // Push function as parameter to the runtime call. __ SmiTag(kJavaScriptCallArgCountRegister); __ Push(kJavaScriptCallTargetRegister, kJavaScriptCallNewTargetRegister, kJavaScriptCallArgCountRegister, kJavaScriptCallTargetRegister); __ CallRuntime(function_id, 1); // Use the return value before restoring a0 __ Add64(a2, a0, Operand(Code::kHeaderSize - kHeapObjectTag)); // Restore target function, new target and actual argument count. __ Pop(kJavaScriptCallTargetRegister, kJavaScriptCallNewTargetRegister, kJavaScriptCallArgCountRegister); __ SmiUntag(kJavaScriptCallArgCountRegister); } static_assert(kJavaScriptCallCodeStartRegister == a2, "ABI mismatch"); __ Jump(a2); } namespace { enum class ArgumentsElementType { kRaw, // Push arguments as they are. kHandle // Dereference arguments before pushing. }; void Generate_PushArguments(MacroAssembler* masm, Register array, Register argc, Register scratch, Register scratch2, ArgumentsElementType element_type) { DCHECK(!AreAliased(array, argc, scratch)); Label loop, entry; __ Sub64(scratch, argc, Operand(kJSArgcReceiverSlots)); __ Branch(&entry); __ bind(&loop); __ CalcScaledAddress(scratch2, array, scratch, kSystemPointerSizeLog2); __ Ld(scratch2, MemOperand(scratch2)); if (element_type == ArgumentsElementType::kHandle) { __ Ld(scratch2, MemOperand(scratch2)); } __ push(scratch2); __ bind(&entry); __ Add64(scratch, scratch, Operand(-1)); __ Branch(&loop, greater_equal, scratch, Operand(zero_reg)); } void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : number of arguments // -- a1 : constructor function // -- a3 : new target // -- cp : context // -- ra : return address // -- sp[...]: constructor arguments // ----------------------------------- // Enter a construct frame. { FrameScope scope(masm, StackFrame::CONSTRUCT); // Preserve the incoming parameters on the stack. __ SmiTag(a0); __ Push(cp, a0); __ SmiUntag(a0); // Set up pointer to first argument (skip receiver). __ Add64( t2, fp, Operand(StandardFrameConstants::kCallerSPOffset + kSystemPointerSize)); // t2: Pointer to start of arguments. // a0: Number of arguments. { UseScratchRegisterScope temps(masm); temps.Include(t0); Generate_PushArguments(masm, t2, a0, temps.Acquire(), temps.Acquire(), ArgumentsElementType::kRaw); } // The receiver for the builtin/api call. __ PushRoot(RootIndex::kTheHoleValue); // Call the function. // a0: number of arguments (untagged) // a1: constructor function // a3: new target __ InvokeFunctionWithNewTarget(a1, a3, a0, InvokeType::kCall); // Restore context from the frame. __ Ld(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); // Restore smi-tagged arguments count from the frame. __ Ld(kScratchReg, MemOperand(fp, ConstructFrameConstants::kLengthOffset)); // Leave construct frame. } // Remove caller arguments from the stack and return. __ DropArguments(kScratchReg, MacroAssembler::kCountIsSmi, MacroAssembler::kCountIncludesReceiver, kScratchReg); __ Ret(); } } // namespace // The construct stub for ES5 constructor functions and ES6 class constructors. void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0: number of arguments (untagged) // -- a1: constructor function // -- a3: new target // -- cp: context // -- ra: return address // -- sp[...]: constructor arguments // ----------------------------------- UseScratchRegisterScope temps(masm); temps.Include(t0, t1); // Enter a construct frame. FrameScope scope(masm, StackFrame::MANUAL); Label post_instantiation_deopt_entry, not_create_implicit_receiver; __ EnterFrame(StackFrame::CONSTRUCT); // Preserve the incoming parameters on the stack. __ SmiTag(a0); __ Push(cp, a0, a1); __ PushRoot(RootIndex::kUndefinedValue); __ Push(a3); // ----------- S t a t e ------------- // -- sp[0*kSystemPointerSize]: new target // -- sp[1*kSystemPointerSize]: padding // -- a1 and sp[2*kSystemPointerSize]: constructor function // -- sp[3*kSystemPointerSize]: number of arguments (tagged) // -- sp[4*kSystemPointerSize]: context // ----------------------------------- { UseScratchRegisterScope temps(masm); Register func_info = temps.Acquire(); __ LoadTaggedPointerField( func_info, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); __ Lwu(func_info, FieldMemOperand(func_info, SharedFunctionInfo::kFlagsOffset)); __ DecodeField(func_info); __ JumpIfIsInRange( func_info, static_cast(FunctionKind::kDefaultDerivedConstructor), static_cast(FunctionKind::kDerivedConstructor), ¬_create_implicit_receiver); Register scratch = func_info; Register scratch2 = temps.Acquire(); // If not derived class constructor: Allocate the new receiver object. __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1, scratch, scratch2); __ Call(BUILTIN_CODE(masm->isolate(), FastNewObject), RelocInfo::CODE_TARGET); __ BranchShort(&post_instantiation_deopt_entry); // Else: use TheHoleValue as receiver for constructor call __ bind(¬_create_implicit_receiver); __ LoadRoot(a0, RootIndex::kTheHoleValue); } // ----------- S t a t e ------------- // -- a0: receiver // -- Slot 4 / sp[0*kSystemPointerSize]: new target // -- Slot 3 / sp[1*kSystemPointerSize]: padding // -- Slot 2 / sp[2*kSystemPointerSize]: constructor function // -- Slot 1 / sp[3*kSystemPointerSize]: number of arguments (tagged) // -- Slot 0 / sp[4*kSystemPointerSize]: context // ----------------------------------- // Deoptimizer enters here. masm->isolate()->heap()->SetConstructStubCreateDeoptPCOffset( masm->pc_offset()); __ bind(&post_instantiation_deopt_entry); // Restore new target. __ Pop(a3); // Push the allocated receiver to the stack. __ Push(a0); // We need two copies because we may have to return the original one // and the calling conventions dictate that the called function pops the // receiver. The second copy is pushed after the arguments, we saved in a6 // since a0 will store the return value of callRuntime. __ Move(a6, a0); // Set up pointer to first argument (skip receiver).. __ Add64( t2, fp, Operand(StandardFrameConstants::kCallerSPOffset + kSystemPointerSize)); // ----------- S t a t e ------------- // -- a3: new target // -- sp[0*kSystemPointerSize]: implicit receiver // -- sp[1*kSystemPointerSize]: implicit receiver // -- sp[2*kSystemPointerSize]: padding // -- sp[3*kSystemPointerSize]: constructor function // -- sp[4*kSystemPointerSize]: number of arguments (tagged) // -- sp[5*kSystemPointerSize]: context // ----------------------------------- // Restore constructor function and argument count. __ Ld(a1, MemOperand(fp, ConstructFrameConstants::kConstructorOffset)); __ Ld(a0, MemOperand(fp, ConstructFrameConstants::kLengthOffset)); __ SmiUntag(a0); Label stack_overflow; { UseScratchRegisterScope temps(masm); __ StackOverflowCheck(a0, temps.Acquire(), temps.Acquire(), &stack_overflow); } // TODO(victorgomes): When the arguments adaptor is completely removed, we // should get the formal parameter count and copy the arguments in its // correct position (including any undefined), instead of delaying this to // InvokeFunction. // Copy arguments and receiver to the expression stack. // t2: Pointer to start of argument. // a0: Number of arguments. { UseScratchRegisterScope temps(masm); Generate_PushArguments(masm, t2, a0, temps.Acquire(), temps.Acquire(), ArgumentsElementType::kRaw); } // We need two copies because we may have to return the original one // and the calling conventions dictate that the called function pops the // receiver. The second copy is pushed after the arguments, __ Push(a6); // Call the function. __ InvokeFunctionWithNewTarget(a1, a3, a0, InvokeType::kCall); // ----------- S t a t e ------------- // -- a0: constructor result // -- sp[0*kSystemPointerSize]: implicit receiver // -- sp[1*kSystemPointerSize]: padding // -- sp[2*kSystemPointerSize]: constructor function // -- sp[3*kSystemPointerSize]: number of arguments // -- sp[4*kSystemPointerSize]: context // ----------------------------------- // Store offset of return address for deoptimizer. masm->isolate()->heap()->SetConstructStubInvokeDeoptPCOffset( masm->pc_offset()); // Restore the context from the frame. __ Ld(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); // If the result is an object (in the ECMA sense), we should get rid // of the receiver and use the result; see ECMA-262 section 13.2.2-7 // on page 74. Label use_receiver, do_throw, leave_and_return, check_receiver; // If the result is undefined, we jump out to using the implicit receiver. __ JumpIfNotRoot(a0, RootIndex::kUndefinedValue, &check_receiver); // Otherwise we do a smi check and fall through to check if the return value // is a valid receiver. // Throw away the result of the constructor invocation and use the // on-stack receiver as the result. __ bind(&use_receiver); __ Ld(a0, MemOperand(sp, 0 * kSystemPointerSize)); __ JumpIfRoot(a0, RootIndex::kTheHoleValue, &do_throw); __ bind(&leave_and_return); // Restore smi-tagged arguments count from the frame. __ Ld(a1, MemOperand(fp, ConstructFrameConstants::kLengthOffset)); // Leave construct frame. __ LeaveFrame(StackFrame::CONSTRUCT); // Remove caller arguments from the stack and return. __ DropArguments(a1, MacroAssembler::kCountIsSmi, MacroAssembler::kCountIncludesReceiver, a4); __ Ret(); __ bind(&check_receiver); __ JumpIfSmi(a0, &use_receiver); // If the type of the result (stored in its map) is less than // FIRST_JS_RECEIVER_TYPE, it is not an object in the ECMA sense. { UseScratchRegisterScope temps(masm); Register map = temps.Acquire(), type = temps.Acquire(); __ GetObjectType(a0, map, type); STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); __ Branch(&leave_and_return, greater_equal, type, Operand(FIRST_JS_RECEIVER_TYPE)); __ Branch(&use_receiver); } __ bind(&do_throw); // Restore the context from the frame. __ Ld(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); __ CallRuntime(Runtime::kThrowConstructorReturnedNonObject); __ break_(0xCC); __ bind(&stack_overflow); // Restore the context from the frame. __ Ld(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); __ CallRuntime(Runtime::kThrowStackOverflow); __ break_(0xCC); } void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) { Generate_JSBuiltinsConstructStubHelper(masm); } static void AssertCodeIsBaseline(MacroAssembler* masm, Register code, Register scratch) { DCHECK(!AreAliased(code, scratch)); // Verify that the code kind is baseline code via the CodeKind. __ Ld(scratch, FieldMemOperand(code, Code::kFlagsOffset)); __ DecodeField(scratch); __ Assert(eq, AbortReason::kExpectedBaselineData, scratch, Operand(static_cast(CodeKind::BASELINE))); } // TODO(v8:11429): Add a path for "not_compiled" and unify the two uses under // the more general dispatch. static void GetSharedFunctionInfoBytecodeOrBaseline(MacroAssembler* masm, Register sfi_data, Register scratch1, Label* is_baseline) { ASM_CODE_COMMENT(masm); Label done; __ GetObjectType(sfi_data, scratch1, scratch1); __ Branch(is_baseline, eq, scratch1, Operand(CODET_TYPE)); __ Branch(&done, ne, scratch1, Operand(INTERPRETER_DATA_TYPE), Label::Distance::kNear); __ LoadTaggedPointerField( sfi_data, FieldMemOperand(sfi_data, InterpreterData::kBytecodeArrayOffset)); __ bind(&done); } // static void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the value to pass to the generator // -- a1 : the JSGeneratorObject to resume // -- ra : return address // ----------------------------------- // Store input value into generator object. __ StoreTaggedField( a0, FieldMemOperand(a1, JSGeneratorObject::kInputOrDebugPosOffset)); __ RecordWriteField(a1, JSGeneratorObject::kInputOrDebugPosOffset, a0, kRAHasNotBeenSaved, SaveFPRegsMode::kIgnore); // Check that a1 is still valid, RecordWrite might have clobbered it. __ AssertGeneratorObject(a1); // Load suspended function and context. __ LoadTaggedPointerField( a4, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset)); __ LoadTaggedPointerField(cp, FieldMemOperand(a4, JSFunction::kContextOffset)); // Flood function if we are stepping. Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator; Label stepping_prepared; ExternalReference debug_hook = ExternalReference::debug_hook_on_function_call_address(masm->isolate()); __ li(a5, debug_hook); __ Lb(a5, MemOperand(a5)); __ Branch(&prepare_step_in_if_stepping, ne, a5, Operand(zero_reg)); // Flood function if we need to continue stepping in the suspended generator. ExternalReference debug_suspended_generator = ExternalReference::debug_suspended_generator_address(masm->isolate()); __ li(a5, debug_suspended_generator); __ Ld(a5, MemOperand(a5)); __ Branch(&prepare_step_in_suspended_generator, eq, a1, Operand(a5)); __ bind(&stepping_prepared); // Check the stack for overflow. We are not trying to catch interruptions // (i.e. debug break and preemption) here, so check the "real stack limit". Label stack_overflow; __ LoadStackLimit(kScratchReg, MacroAssembler::StackLimitKind::kRealStackLimit); __ Branch(&stack_overflow, Uless, sp, Operand(kScratchReg)); // ----------- S t a t e ------------- // -- a1 : the JSGeneratorObject to resume // -- a4 : generator function // -- cp : generator context // -- ra : return address // ----------------------------------- // Push holes for arguments to generator function. Since the parser forced // context allocation for any variables in generators, the actual argument // values have already been copied into the context and these dummy values // will never be used. __ LoadTaggedPointerField( a3, FieldMemOperand(a4, JSFunction::kSharedFunctionInfoOffset)); __ Lhu(a3, FieldMemOperand(a3, SharedFunctionInfo::kFormalParameterCountOffset)); __ Sub64(a3, a3, Operand(kJSArgcReceiverSlots)); __ LoadTaggedPointerField( t1, FieldMemOperand(a1, JSGeneratorObject::kParametersAndRegistersOffset)); { Label done_loop, loop; __ bind(&loop); __ Sub64(a3, a3, Operand(1)); __ Branch(&done_loop, lt, a3, Operand(zero_reg), Label::Distance::kNear); __ CalcScaledAddress(kScratchReg, t1, a3, kTaggedSizeLog2); __ LoadAnyTaggedField( kScratchReg, FieldMemOperand(kScratchReg, FixedArray::kHeaderSize)); __ Push(kScratchReg); __ Branch(&loop); __ bind(&done_loop); // Push receiver. __ LoadAnyTaggedField( kScratchReg, FieldMemOperand(a1, JSGeneratorObject::kReceiverOffset)); __ Push(kScratchReg); } // Underlying function needs to have bytecode available. if (FLAG_debug_code) { Label is_baseline; __ LoadTaggedPointerField( a3, FieldMemOperand(a4, JSFunction::kSharedFunctionInfoOffset)); __ LoadTaggedPointerField( a3, FieldMemOperand(a3, SharedFunctionInfo::kFunctionDataOffset)); GetSharedFunctionInfoBytecodeOrBaseline(masm, a3, a0, &is_baseline); __ GetObjectType(a3, a3, a3); __ Assert(eq, AbortReason::kMissingBytecodeArray, a3, Operand(BYTECODE_ARRAY_TYPE)); __ bind(&is_baseline); } // Resume (Ignition/TurboFan) generator object. { __ LoadTaggedPointerField( a0, FieldMemOperand(a4, JSFunction::kSharedFunctionInfoOffset)); __ Lhu(a0, FieldMemOperand( a0, SharedFunctionInfo::kFormalParameterCountOffset)); // We abuse new.target both to indicate that this is a resume call and to // pass in the generator object. In ordinary calls, new.target is always // undefined because generator functions are non-constructable. __ Move(a3, a1); __ Move(a1, a4); static_assert(kJavaScriptCallCodeStartRegister == a2, "ABI mismatch"); __ LoadTaggedPointerField(a2, FieldMemOperand(a1, JSFunction::kCodeOffset)); __ JumpCodeObject(a2); } __ bind(&prepare_step_in_if_stepping); { FrameScope scope(masm, StackFrame::INTERNAL); __ Push(a1, a4); // Push hole as receiver since we do not use it for stepping. __ PushRoot(RootIndex::kTheHoleValue); __ CallRuntime(Runtime::kDebugOnFunctionCall); __ Pop(a1); } __ LoadTaggedPointerField( a4, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset)); __ Branch(&stepping_prepared); __ bind(&prepare_step_in_suspended_generator); { FrameScope scope(masm, StackFrame::INTERNAL); __ Push(a1); __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator); __ Pop(a1); } __ LoadTaggedPointerField( a4, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset)); __ Branch(&stepping_prepared); __ bind(&stack_overflow); { FrameScope scope(masm, StackFrame::INTERNAL); __ CallRuntime(Runtime::kThrowStackOverflow); __ break_(0xCC); // This should be unreachable. } } void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { FrameScope scope(masm, StackFrame::INTERNAL); __ Push(a1); __ CallRuntime(Runtime::kThrowConstructedNonConstructable); } // Clobbers scratch1 and scratch2; preserves all other registers. static void Generate_CheckStackOverflow(MacroAssembler* masm, Register argc, Register scratch1, Register scratch2) { // Check the stack for overflow. We are not trying to catch // interruptions (e.g. debug break and preemption) here, so the "real stack // limit" is checked. Label okay; __ LoadStackLimit(scratch1, MacroAssembler::StackLimitKind::kRealStackLimit); // Make a2 the space we have left. The stack might already be overflowed // here which will cause r2 to become negative. __ Sub64(scratch1, sp, scratch1); // Check if the arguments will overflow the stack. __ Sll64(scratch2, argc, kSystemPointerSizeLog2); __ Branch(&okay, gt, scratch1, Operand(scratch2), Label::Distance::kNear); // Signed comparison. // Out of stack space. __ CallRuntime(Runtime::kThrowStackOverflow); __ bind(&okay); } namespace { // Called with the native C calling convention. The corresponding function // signature is either: // // using JSEntryFunction = GeneratedCode; // or // using JSEntryFunction = GeneratedCode; void Generate_JSEntryVariant(MacroAssembler* masm, StackFrame::Type type, Builtin entry_trampoline) { Label invoke, handler_entry, exit; { NoRootArrayScope no_root_array(masm); // TODO(plind): unify the ABI description here. // Registers: // either // a0: root register value // a1: entry address // a2: function // a3: receiver // a4: argc // a5: argv // or // a0: root register value // a1: microtask_queue // Save callee saved registers on the stack. __ MultiPush(kCalleeSaved | ra); // Save callee-saved FPU registers. __ MultiPushFPU(kCalleeSavedFPU); // Set up the reserved register for 0.0. __ LoadFPRImmediate(kDoubleRegZero, 0.0); // Initialize the root register. // C calling convention. The first argument is passed in a0. __ Move(kRootRegister, a0); #ifdef V8_COMPRESS_POINTERS_IN_SHARED_CAGE // Initialize the pointer cage base register. __ LoadRootRelative(kPtrComprCageBaseRegister, IsolateData::cage_base_offset()); #endif } // a1: entry address // a2: function // a3: receiver // a4: argc // a5: argv // We build an EntryFrame. __ li(s1, Operand(-1)); // Push a bad frame pointer to fail if it is used. __ li(s2, Operand(StackFrame::TypeToMarker(type))); __ li(s3, Operand(StackFrame::TypeToMarker(type))); ExternalReference c_entry_fp = ExternalReference::Create( IsolateAddressId::kCEntryFPAddress, masm->isolate()); __ li(s5, c_entry_fp); __ Ld(s4, MemOperand(s5)); __ Push(s1, s2, s3, s4); // Clear c_entry_fp, now we've pushed its previous value to the stack. // If the c_entry_fp is not already zero and we don't clear it, the // SafeStackFrameIterator will assume we are executing C++ and miss the JS // frames on top. __ Sd(zero_reg, MemOperand(s5)); // Set up frame pointer for the frame to be pushed. __ Add64(fp, sp, -EntryFrameConstants::kCallerFPOffset); // Registers: // either // a1: entry address // a2: function // a3: receiver // a4: argc // a5: argv // or // a1: microtask_queue // // Stack: // caller fp | // function slot | entry frame // context slot | // bad fp (0xFF...F) | // callee saved registers + ra // [ O32: 4 args slots] // args // If this is the outermost JS call, set js_entry_sp value. Label non_outermost_js; ExternalReference js_entry_sp = ExternalReference::Create( IsolateAddressId::kJSEntrySPAddress, masm->isolate()); __ li(s1, js_entry_sp); __ Ld(s2, MemOperand(s1)); __ Branch(&non_outermost_js, ne, s2, Operand(zero_reg), Label::Distance::kNear); __ Sd(fp, MemOperand(s1)); __ li(s3, Operand(StackFrame::OUTERMOST_JSENTRY_FRAME)); Label cont; __ Branch(&cont); __ bind(&non_outermost_js); __ li(s3, Operand(StackFrame::INNER_JSENTRY_FRAME)); __ bind(&cont); __ push(s3); // Jump to a faked try block that does the invoke, with a faked catch // block that sets the pending exception. __ BranchShort(&invoke); __ bind(&handler_entry); // Store the current pc as the handler offset. It's used later to create the // handler table. masm->isolate()->builtins()->SetJSEntryHandlerOffset(handler_entry.pos()); // Caught exception: Store result (exception) in the pending exception // field in the JSEnv and return a failure sentinel. Coming in here the // fp will be invalid because the PushStackHandler below sets it to 0 to // signal the existence of the JSEntry frame. __ li(s1, ExternalReference::Create( IsolateAddressId::kPendingExceptionAddress, masm->isolate())); __ Sd(a0, MemOperand(s1)); // We come back from 'invoke'. result is in a0. __ LoadRoot(a0, RootIndex::kException); __ BranchShort(&exit); // Invoke: Link this frame into the handler chain. __ bind(&invoke); __ PushStackHandler(); // If an exception not caught by another handler occurs, this handler // returns control to the code after the bal(&invoke) above, which // restores all kCalleeSaved registers (including cp and fp) to their // saved values before returning a failure to C. // // Registers: // either // a0: root register value // a1: entry address // a2: function // a3: receiver // a4: argc // a5: argv // or // a0: root register value // a1: microtask_queue // // Stack: // handler frame // entry frame // callee saved registers + ra // [ O32: 4 args slots] // args // // Invoke the function by calling through JS entry trampoline builtin and // pop the faked function when we return. Handle trampoline_code = masm->isolate()->builtins()->code_handle(entry_trampoline); __ Call(trampoline_code, RelocInfo::CODE_TARGET); // Unlink this frame from the handler chain. __ PopStackHandler(); __ bind(&exit); // a0 holds result // Check if the current stack frame is marked as the outermost JS frame. Label non_outermost_js_2; __ pop(a5); __ Branch(&non_outermost_js_2, ne, a5, Operand(StackFrame::OUTERMOST_JSENTRY_FRAME), Label::Distance::kNear); __ li(a5, js_entry_sp); __ Sd(zero_reg, MemOperand(a5)); __ bind(&non_outermost_js_2); // Restore the top frame descriptors from the stack. __ pop(a5); __ li(a4, ExternalReference::Create(IsolateAddressId::kCEntryFPAddress, masm->isolate())); __ Sd(a5, MemOperand(a4)); // Reset the stack to the callee saved registers. __ Add64(sp, sp, -EntryFrameConstants::kCallerFPOffset); // Restore callee-saved fpu registers. __ MultiPopFPU(kCalleeSavedFPU); // Restore callee saved registers from the stack. __ MultiPop(kCalleeSaved | ra); // Return. __ Jump(ra); } } // namespace void Builtins::Generate_JSEntry(MacroAssembler* masm) { Generate_JSEntryVariant(masm, StackFrame::ENTRY, Builtin::kJSEntryTrampoline); } void Builtins::Generate_JSConstructEntry(MacroAssembler* masm) { Generate_JSEntryVariant(masm, StackFrame::CONSTRUCT_ENTRY, Builtin::kJSConstructEntryTrampoline); } void Builtins::Generate_JSRunMicrotasksEntry(MacroAssembler* masm) { Generate_JSEntryVariant(masm, StackFrame::ENTRY, Builtin::kRunMicrotasksTrampoline); } static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, bool is_construct) { // ----------- S t a t e ------------- // -- a1: new.target // -- a2: function // -- a3: receiver_pointer // -- a4: argc // -- a5: argv // ----------------------------------- // Enter an internal frame. { FrameScope scope(masm, StackFrame::INTERNAL); // Setup the context (we need to use the caller context from the isolate). ExternalReference context_address = ExternalReference::Create( IsolateAddressId::kContextAddress, masm->isolate()); __ li(cp, context_address); __ Ld(cp, MemOperand(cp)); // Push the function onto the stack. __ Push(a2); // Check if we have enough stack space to push all arguments. __ mv(a6, a4); Generate_CheckStackOverflow(masm, a6, a0, s2); // Copy arguments to the stack. // a4: argc // a5: argv, i.e. points to first arg { UseScratchRegisterScope temps(masm); Generate_PushArguments(masm, a5, a4, temps.Acquire(), temps.Acquire(), ArgumentsElementType::kHandle); } // Push the receive. __ Push(a3); // a0: argc // a1: function // a3: new.target __ Move(a3, a1); __ Move(a1, a2); __ Move(a0, a4); // Initialize all JavaScript callee-saved registers, since they will be seen // by the garbage collector as part of handlers. __ LoadRoot(a4, RootIndex::kUndefinedValue); __ Move(a5, a4); __ Move(s1, a4); __ Move(s2, a4); __ Move(s3, a4); __ Move(s4, a4); __ Move(s5, a4); #ifndef V8_COMPRESS_POINTERS_IN_SHARED_CAGE __ Move(s11, a4); #endif // s6 holds the root address. Do not clobber. // s7 is cp. Do not init. // Invoke the code. Handle builtin = is_construct ? BUILTIN_CODE(masm->isolate(), Construct) : masm->isolate()->builtins()->Call(); __ Call(builtin, RelocInfo::CODE_TARGET); // Leave internal frame. } __ Jump(ra); } void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { Generate_JSEntryTrampolineHelper(masm, false); } void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { Generate_JSEntryTrampolineHelper(masm, true); } void Builtins::Generate_RunMicrotasksTrampoline(MacroAssembler* masm) { // a1: microtask_queue __ Move(RunMicrotasksDescriptor::MicrotaskQueueRegister(), a1); __ Jump(BUILTIN_CODE(masm->isolate(), RunMicrotasks), RelocInfo::CODE_TARGET); } static void ReplaceClosureCodeWithOptimizedCode(MacroAssembler* masm, Register optimized_code, Register closure, Register scratch1, Register scratch2) { ASM_CODE_COMMENT(masm); DCHECK(!AreAliased(optimized_code, closure)); // Store code entry in the closure. __ StoreTaggedField(optimized_code, FieldMemOperand(closure, JSFunction::kCodeOffset)); __ Move(scratch1, optimized_code); // Write barrier clobbers scratch1 below. __ RecordWriteField(closure, JSFunction::kCodeOffset, scratch1, kRAHasNotBeenSaved, SaveFPRegsMode::kIgnore, RememberedSetAction::kOmit, SmiCheck::kOmit); } static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch1, Register scratch2) { ASM_CODE_COMMENT(masm); Register params_size = scratch1; // Get the size of the formal parameters + receiver (in bytes). __ Ld(params_size, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); __ Lw(params_size, FieldMemOperand(params_size, BytecodeArray::kParameterSizeOffset)); Register actual_params_size = scratch2; Label L1; // Compute the size of the actual parameters + receiver (in bytes). __ Ld(actual_params_size, MemOperand(fp, StandardFrameConstants::kArgCOffset)); __ Sll64(actual_params_size, actual_params_size, kSystemPointerSizeLog2); // If actual is bigger than formal, then we should use it to free up the stack // arguments. __ Branch(&L1, le, actual_params_size, Operand(params_size), Label::Distance::kNear); __ Move(params_size, actual_params_size); __ bind(&L1); // Leave the frame (also dropping the register file). __ LeaveFrame(StackFrame::INTERPRETED); // Drop receiver + arguments. __ DropArguments(params_size, MacroAssembler::kCountIsBytes, MacroAssembler::kCountIncludesReceiver); } // Tail-call |function_id| if |actual_state| == |expected_state| static void TailCallRuntimeIfStateEquals(MacroAssembler* masm, Register actual_state, TieringState expected_state, Runtime::FunctionId function_id) { ASM_CODE_COMMENT(masm); Label no_match; __ Branch(&no_match, ne, actual_state, Operand(static_cast(expected_state)), Label::Distance::kNear); GenerateTailCallToReturnedCode(masm, function_id); __ bind(&no_match); } static void TailCallOptimizedCodeSlot(MacroAssembler* masm, Register optimized_code_entry, Register scratch1, Register scratch2) { // ----------- S t a t e ------------- // -- a0 : actual argument count // -- a3 : new target (preserved for callee if needed, and caller) // -- a1 : target function (preserved for callee if needed, and caller) // ----------------------------------- ASM_CODE_COMMENT(masm); DCHECK(!AreAliased(optimized_code_entry, a1, a3, scratch1, scratch2)); Register closure = a1; Label heal_optimized_code_slot; // If the optimized code is cleared, go to runtime to update the optimization // marker field. __ LoadWeakValue(optimized_code_entry, optimized_code_entry, &heal_optimized_code_slot); // Check if the optimized code is marked for deopt. If it is, call the // runtime to clear it. __ LoadTaggedPointerField( a5, FieldMemOperand(optimized_code_entry, Code::kCodeDataContainerOffset)); __ Lw(a5, FieldMemOperand(a5, CodeDataContainer::kKindSpecificFlagsOffset)); __ And(a5, a5, Operand(1 << Code::kMarkedForDeoptimizationBit)); __ Branch(&heal_optimized_code_slot, ne, a5, Operand(zero_reg), Label::Distance::kNear); // Optimized code is good, get it into the closure and link the closure into // the optimized functions list, then tail call the optimized code. // The feedback vector is no longer used, so re-use it as a scratch // register. ReplaceClosureCodeWithOptimizedCode(masm, optimized_code_entry, closure, scratch1, scratch2); static_assert(kJavaScriptCallCodeStartRegister == a2, "ABI mismatch"); __ LoadCodeObjectEntry(a2, optimized_code_entry); __ Jump(a2); // Optimized code slot contains deoptimized code or code is cleared and // optimized code marker isn't updated. Evict the code, update the marker // and re-enter the closure's code. __ bind(&heal_optimized_code_slot); GenerateTailCallToReturnedCode(masm, Runtime::kHealOptimizedCodeSlot); } static void MaybeOptimizeCode(MacroAssembler* masm, Register feedback_vector, Register tiering_state) { // ----------- S t a t e ------------- // -- a0 : actual argument count // -- a3 : new target (preserved for callee if needed, and caller) // -- a1 : target function (preserved for callee if needed, and caller) // -- feedback vector (preserved for caller if needed) // -- tiering_state : a int32 containing a non-zero optimization // marker. // ----------------------------------- ASM_CODE_COMMENT(masm); DCHECK(!AreAliased(feedback_vector, a1, a3, tiering_state)); // TODO(v8:8394): The logging of first execution will break if // feedback vectors are not allocated. We need to find a different way of // logging these events if required. TailCallRuntimeIfStateEquals(masm, tiering_state, TieringState::kRequestTurbofan_Synchronous, Runtime::kCompileTurbofan_Synchronous); TailCallRuntimeIfStateEquals(masm, tiering_state, TieringState::kRequestTurbofan_Concurrent, Runtime::kCompileTurbofan_Concurrent); __ stop(); } // Advance the current bytecode offset. This simulates what all bytecode // handlers do upon completion of the underlying operation. Will bail out to a // label if the bytecode (without prefix) is a return bytecode. Will not advance // the bytecode offset if the current bytecode is a JumpLoop, instead just // re-executing the JumpLoop to jump to the correct bytecode. static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm, Register bytecode_array, Register bytecode_offset, Register bytecode, Register scratch1, Register scratch2, Register scratch3, Label* if_return) { ASM_CODE_COMMENT(masm); Register bytecode_size_table = scratch1; // The bytecode offset value will be increased by one in wide and extra wide // cases. In the case of having a wide or extra wide JumpLoop bytecode, we // will restore the original bytecode. In order to simplify the code, we have // a backup of it. Register original_bytecode_offset = scratch3; DCHECK(!AreAliased(bytecode_array, bytecode_offset, bytecode, bytecode_size_table, original_bytecode_offset)); __ Move(original_bytecode_offset, bytecode_offset); __ li(bytecode_size_table, ExternalReference::bytecode_size_table_address()); // Check if the bytecode is a Wide or ExtraWide prefix bytecode. Label process_bytecode, extra_wide; STATIC_ASSERT(0 == static_cast(interpreter::Bytecode::kWide)); STATIC_ASSERT(1 == static_cast(interpreter::Bytecode::kExtraWide)); STATIC_ASSERT(2 == static_cast(interpreter::Bytecode::kDebugBreakWide)); STATIC_ASSERT(3 == static_cast(interpreter::Bytecode::kDebugBreakExtraWide)); __ Branch(&process_bytecode, Ugreater, bytecode, Operand(3), Label::Distance::kNear); __ And(scratch2, bytecode, Operand(1)); __ Branch(&extra_wide, ne, scratch2, Operand(zero_reg), Label::Distance::kNear); // Load the next bytecode and update table to the wide scaled table. __ Add64(bytecode_offset, bytecode_offset, Operand(1)); __ Add64(scratch2, bytecode_array, bytecode_offset); __ Lbu(bytecode, MemOperand(scratch2)); __ Add64(bytecode_size_table, bytecode_size_table, Operand(kByteSize * interpreter::Bytecodes::kBytecodeCount)); __ BranchShort(&process_bytecode); __ bind(&extra_wide); // Load the next bytecode and update table to the extra wide scaled table. __ Add64(bytecode_offset, bytecode_offset, Operand(1)); __ Add64(scratch2, bytecode_array, bytecode_offset); __ Lbu(bytecode, MemOperand(scratch2)); __ Add64(bytecode_size_table, bytecode_size_table, Operand(2 * kByteSize * interpreter::Bytecodes::kBytecodeCount)); __ bind(&process_bytecode); // Bailout to the return label if this is a return bytecode. #define JUMP_IF_EQUAL(NAME) \ __ Branch(if_return, eq, bytecode, \ Operand(static_cast(interpreter::Bytecode::k##NAME))); RETURN_BYTECODE_LIST(JUMP_IF_EQUAL) #undef JUMP_IF_EQUAL // If this is a JumpLoop, re-execute it to perform the jump to the beginning // of the loop. Label end, not_jump_loop; __ Branch(¬_jump_loop, ne, bytecode, Operand(static_cast(interpreter::Bytecode::kJumpLoop)), Label::Distance::kNear); // We need to restore the original bytecode_offset since we might have // increased it to skip the wide / extra-wide prefix bytecode. __ Move(bytecode_offset, original_bytecode_offset); __ BranchShort(&end); __ bind(¬_jump_loop); // Otherwise, load the size of the current bytecode and advance the offset. __ Add64(scratch2, bytecode_size_table, bytecode); __ Lb(scratch2, MemOperand(scratch2)); __ Add64(bytecode_offset, bytecode_offset, scratch2); __ bind(&end); } // Read off the optimization state in the feedback vector and check if there // is optimized code or a tiering state that needs to be processed. static void LoadTieringStateAndJumpIfNeedsProcessing( MacroAssembler* masm, Register optimization_state, Register feedback_vector, Label* has_optimized_code_or_state) { ASM_CODE_COMMENT(masm); DCHECK(!AreAliased(optimization_state, feedback_vector)); UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ Lw(optimization_state, FieldMemOperand(feedback_vector, FeedbackVector::kFlagsOffset)); __ And( scratch, optimization_state, Operand(FeedbackVector::kHasOptimizedCodeOrTieringStateIsAnyRequestMask)); __ Branch(has_optimized_code_or_state, ne, scratch, Operand(zero_reg)); } static void MaybeOptimizeCodeOrTailCallOptimizedCodeSlot( MacroAssembler* masm, Register optimization_state, Register feedback_vector) { ASM_CODE_COMMENT(masm); DCHECK(!AreAliased(optimization_state, feedback_vector)); UseScratchRegisterScope temps(masm); temps.Include(t0, t1); Label maybe_has_optimized_code; // Check if optimized code marker is available { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ And(scratch, optimization_state, Operand(FeedbackVector::kTieringStateIsAnyRequestMask)); __ Branch(&maybe_has_optimized_code, eq, scratch, Operand(zero_reg), Label::Distance::kNear); } Register tiering_state = optimization_state; __ DecodeField(tiering_state); MaybeOptimizeCode(masm, feedback_vector, tiering_state); __ bind(&maybe_has_optimized_code); Register optimized_code_entry = optimization_state; __ LoadAnyTaggedField( tiering_state, FieldMemOperand(feedback_vector, FeedbackVector::kMaybeOptimizedCodeOffset)); TailCallOptimizedCodeSlot(masm, optimized_code_entry, temps.Acquire(), temps.Acquire()); } namespace { void ResetBytecodeAgeAndOsrState(MacroAssembler* masm, Register bytecode_array) { // Reset code age and the OSR state (optimized to a single write). static_assert(BytecodeArray::kOsrStateAndBytecodeAgeAreContiguous32Bits); STATIC_ASSERT(BytecodeArray::kNoAgeBytecodeAge == 0); __ Sw(zero_reg, FieldMemOperand(bytecode_array, BytecodeArray::kOsrUrgencyAndInstallTargetOffset)); } } // namespace // static void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) { UseScratchRegisterScope temps(masm); temps.Include({kScratchReg, kScratchReg2}); auto descriptor = Builtins::CallInterfaceDescriptorFor(Builtin::kBaselineOutOfLinePrologue); Register closure = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kClosure); // Load the feedback vector from the closure. Register feedback_vector = temps.Acquire(); __ Ld(feedback_vector, FieldMemOperand(closure, JSFunction::kFeedbackCellOffset)); __ Ld(feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); if (FLAG_debug_code) { UseScratchRegisterScope temps(masm); Register type = temps.Acquire(); __ GetObjectType(feedback_vector, type, type); __ Assert(eq, AbortReason::kExpectedFeedbackVector, type, Operand(FEEDBACK_VECTOR_TYPE)); } // Check for an tiering state. Label has_optimized_code_or_state; Register optimization_state = temps.Acquire(); LoadTieringStateAndJumpIfNeedsProcessing( masm, optimization_state, feedback_vector, &has_optimized_code_or_state); // Increment invocation count for the function. { UseScratchRegisterScope temps(masm); Register invocation_count = temps.Acquire(); __ Lw(invocation_count, FieldMemOperand(feedback_vector, FeedbackVector::kInvocationCountOffset)); __ Add32(invocation_count, invocation_count, Operand(1)); __ Sw(invocation_count, FieldMemOperand(feedback_vector, FeedbackVector::kInvocationCountOffset)); } FrameScope frame_scope(masm, StackFrame::MANUAL); { ASM_CODE_COMMENT_STRING(masm, "Frame Setup"); // Normally the first thing we'd do here is Push(lr, fp), but we already // entered the frame in BaselineCompiler::Prologue, as we had to use the // value lr before the call to this BaselineOutOfLinePrologue builtin. Register callee_context = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kCalleeContext); Register callee_js_function = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kClosure); __ Push(callee_context, callee_js_function); DCHECK_EQ(callee_js_function, kJavaScriptCallTargetRegister); DCHECK_EQ(callee_js_function, kJSFunctionRegister); Register argc = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kJavaScriptCallArgCount); // We'll use the bytecode for both code age/OSR resetting, and pushing onto // the frame, so load it into a register. Register bytecode_array = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kInterpreterBytecodeArray); ResetBytecodeAgeAndOsrState(masm, bytecode_array); __ Push(argc, bytecode_array); // Baseline code frames store the feedback vector where interpreter would // store the bytecode offset. if (FLAG_debug_code) { UseScratchRegisterScope temps(masm); Register invocation_count = temps.Acquire(); __ GetObjectType(feedback_vector, invocation_count, invocation_count); __ Assert(eq, AbortReason::kExpectedFeedbackVector, invocation_count, Operand(FEEDBACK_VECTOR_TYPE)); } // Our stack is currently aligned. We have have to push something along with // the feedback vector to keep it that way -- we may as well start // initialising the register frame. // TODO(v8:11429,leszeks): Consider guaranteeing that this call leaves // `undefined` in the accumulator register, to skip the load in the baseline // code. __ Push(feedback_vector); } Label call_stack_guard; Register frame_size = descriptor.GetRegisterParameter( BaselineOutOfLinePrologueDescriptor::kStackFrameSize); { ASM_CODE_COMMENT_STRING(masm, "Stack/interrupt check"); // Stack check. This folds the checks for both the interrupt stack limit // check and the real stack limit into one by just checking for the // interrupt limit. The interrupt limit is either equal to the real stack // limit or tighter. By ensuring we have space until that limit after // building the frame we can quickly precheck both at once. UseScratchRegisterScope temps(masm); Register sp_minus_frame_size = temps.Acquire(); __ Sub64(sp_minus_frame_size, sp, frame_size); Register interrupt_limit = temps.Acquire(); __ LoadStackLimit(interrupt_limit, MacroAssembler::StackLimitKind::kInterruptStackLimit); __ Branch(&call_stack_guard, Uless, sp_minus_frame_size, Operand(interrupt_limit)); } // Do "fast" return to the caller pc in lr. // TODO(v8:11429): Document this frame setup better. __ Ret(); __ bind(&has_optimized_code_or_state); { ASM_CODE_COMMENT_STRING(masm, "Optimized marker check"); // Drop the frame created by the baseline call. __ Pop(ra, fp); MaybeOptimizeCodeOrTailCallOptimizedCodeSlot(masm, optimization_state, feedback_vector); __ Trap(); } __ bind(&call_stack_guard); { ASM_CODE_COMMENT_STRING(masm, "Stack/interrupt call"); FrameScope frame_scope(masm, StackFrame::INTERNAL); // Save incoming new target or generator __ Push(kJavaScriptCallNewTargetRegister); __ SmiTag(frame_size); __ Push(frame_size); __ CallRuntime(Runtime::kStackGuardWithGap); __ Pop(kJavaScriptCallNewTargetRegister); } __ Ret(); temps.Exclude({kScratchReg, kScratchReg2}); } // Generate code for entering a JS function with the interpreter. // On entry to the function the receiver and arguments have been pushed on the // stack left to right. // // The live registers are: // o a0 : actual argument count // o a1: the JS function object being called. // o a3: the incoming new target or generator object // o cp: our context // o fp: the caller's frame pointer // o sp: stack pointer // o ra: return address // // The function builds an interpreter frame. See InterpreterFrameConstants in // frames-constants.h for its layout. void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { Register closure = a1; Register feedback_vector = a2; UseScratchRegisterScope temps(masm); temps.Include(t0, t1); Register scratch = temps.Acquire(); Register scratch2 = temps.Acquire(); // Get the bytecode array from the function object and load it into // kInterpreterBytecodeArrayRegister. __ LoadTaggedPointerField( kScratchReg, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); __ LoadTaggedPointerField( kInterpreterBytecodeArrayRegister, FieldMemOperand(kScratchReg, SharedFunctionInfo::kFunctionDataOffset)); Label is_baseline; GetSharedFunctionInfoBytecodeOrBaseline( masm, kInterpreterBytecodeArrayRegister, kScratchReg, &is_baseline); // The bytecode array could have been flushed from the shared function info, // if so, call into CompileLazy. Label compile_lazy; __ GetObjectType(kInterpreterBytecodeArrayRegister, kScratchReg, kScratchReg); __ Branch(&compile_lazy, ne, kScratchReg, Operand(BYTECODE_ARRAY_TYPE)); // Load the feedback vector from the closure. __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(closure, JSFunction::kFeedbackCellOffset)); __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); Label push_stack_frame; // Check if feedback vector is valid. If valid, check for optimized code // and update invocation count. Otherwise, setup the stack frame. __ LoadTaggedPointerField( a4, FieldMemOperand(feedback_vector, HeapObject::kMapOffset)); __ Lhu(a4, FieldMemOperand(a4, Map::kInstanceTypeOffset)); __ Branch(&push_stack_frame, ne, a4, Operand(FEEDBACK_VECTOR_TYPE), Label::Distance::kNear); // Read off the optimization state in the feedback vector, and if there // is optimized code or an tiering state, call that instead. Register optimization_state = a4; __ Lw(optimization_state, FieldMemOperand(feedback_vector, FeedbackVector::kFlagsOffset)); // Check if the optimized code slot is not empty or has a tiering state. Label has_optimized_code_or_state; __ And(scratch, optimization_state, FeedbackVector::kHasOptimizedCodeOrTieringStateIsAnyRequestMask); __ Branch(&has_optimized_code_or_state, ne, scratch, Operand(zero_reg)); Label not_optimized; __ bind(¬_optimized); // Increment invocation count for the function. __ Lw(a4, FieldMemOperand(feedback_vector, FeedbackVector::kInvocationCountOffset)); __ Add32(a4, a4, Operand(1)); __ Sw(a4, FieldMemOperand(feedback_vector, FeedbackVector::kInvocationCountOffset)); // Open a frame scope to indicate that there is a frame on the stack. The // MANUAL indicates that the scope shouldn't actually generate code to set up // the frame (that is done below). __ bind(&push_stack_frame); FrameScope frame_scope(masm, StackFrame::MANUAL); __ PushStandardFrame(closure); ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister); // Load initial bytecode offset. __ li(kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); // Push bytecode array and Smi tagged bytecode array offset. __ SmiTag(a4, kInterpreterBytecodeOffsetRegister); __ Push(kInterpreterBytecodeArrayRegister, a4); // Allocate the local and temporary register file on the stack. Label stack_overflow; { // Load frame size (word) from the BytecodeArray object. __ Lw(a4, FieldMemOperand(kInterpreterBytecodeArrayRegister, BytecodeArray::kFrameSizeOffset)); // Do a stack check to ensure we don't go over the limit. __ Sub64(a5, sp, Operand(a4)); __ LoadStackLimit(a2, MacroAssembler::StackLimitKind::kRealStackLimit); __ Branch(&stack_overflow, Uless, a5, Operand(a2)); // If ok, push undefined as the initial value for all register file entries. Label loop_header; Label loop_check; __ LoadRoot(a5, RootIndex::kUndefinedValue); __ BranchShort(&loop_check); __ bind(&loop_header); // TODO(rmcilroy): Consider doing more than one push per loop iteration. __ push(a5); // Continue loop if not done. __ bind(&loop_check); __ Sub64(a4, a4, Operand(kSystemPointerSize)); __ Branch(&loop_header, ge, a4, Operand(zero_reg)); } // If the bytecode array has a valid incoming new target or generator object // register, initialize it with incoming value which was passed in a3. Label no_incoming_new_target_or_generator_register; __ Lw(a5, FieldMemOperand( kInterpreterBytecodeArrayRegister, BytecodeArray::kIncomingNewTargetOrGeneratorRegisterOffset)); __ Branch(&no_incoming_new_target_or_generator_register, eq, a5, Operand(zero_reg), Label::Distance::kNear); __ CalcScaledAddress(a5, fp, a5, kSystemPointerSizeLog2); __ Sd(a3, MemOperand(a5)); __ bind(&no_incoming_new_target_or_generator_register); // Perform interrupt stack check. // TODO(solanes): Merge with the real stack limit check above. Label stack_check_interrupt, after_stack_check_interrupt; __ LoadStackLimit(a5, MacroAssembler::StackLimitKind::kInterruptStackLimit); __ Branch(&stack_check_interrupt, Uless, sp, Operand(a5), Label::Distance::kNear); __ bind(&after_stack_check_interrupt); // Load accumulator as undefined. __ LoadRoot(kInterpreterAccumulatorRegister, RootIndex::kUndefinedValue); // Load the dispatch table into a register and dispatch to the bytecode // handler at the current bytecode offset. Label do_dispatch; __ bind(&do_dispatch); __ li(kInterpreterDispatchTableRegister, ExternalReference::interpreter_dispatch_table_address(masm->isolate())); __ Add64(a1, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister); __ Lbu(a7, MemOperand(a1)); __ CalcScaledAddress(kScratchReg, kInterpreterDispatchTableRegister, a7, kSystemPointerSizeLog2); __ Ld(kJavaScriptCallCodeStartRegister, MemOperand(kScratchReg)); __ Call(kJavaScriptCallCodeStartRegister); masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset()); // Any returns to the entry trampoline are either due to the return bytecode // or the interpreter tail calling a builtin and then a dispatch. // Get bytecode array and bytecode offset from the stack frame. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); __ Ld(kInterpreterBytecodeOffsetRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); __ SmiUntag(kInterpreterBytecodeOffsetRegister); // Either return, or advance to the next bytecode and dispatch. Label do_return; __ Add64(a1, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister); __ Lbu(a1, MemOperand(a1)); AdvanceBytecodeOffsetOrReturn(masm, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister, a1, a2, a3, a4, &do_return); __ Branch(&do_dispatch); __ bind(&do_return); // The return value is in a0. LeaveInterpreterFrame(masm, scratch, scratch2); __ Jump(ra); __ bind(&stack_check_interrupt); // Modify the bytecode offset in the stack to be kFunctionEntryBytecodeOffset // for the call to the StackGuard. __ li(kInterpreterBytecodeOffsetRegister, Operand(Smi::FromInt(BytecodeArray::kHeaderSize - kHeapObjectTag + kFunctionEntryBytecodeOffset))); __ Sd(kInterpreterBytecodeOffsetRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); __ CallRuntime(Runtime::kStackGuard); // After the call, restore the bytecode array, bytecode offset and accumulator // registers again. Also, restore the bytecode offset in the stack to its // previous value. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); __ li(kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); __ LoadRoot(kInterpreterAccumulatorRegister, RootIndex::kUndefinedValue); __ SmiTag(a5, kInterpreterBytecodeOffsetRegister); __ Sd(a5, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); __ Branch(&after_stack_check_interrupt); __ bind(&has_optimized_code_or_state); MaybeOptimizeCodeOrTailCallOptimizedCodeSlot(masm, optimization_state, feedback_vector); __ bind(&is_baseline); { // Load the feedback vector from the closure. __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(closure, JSFunction::kFeedbackCellOffset)); __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); Label install_baseline_code; // Check if feedback vector is valid. If not, call prepare for baseline to // allocate it. __ LoadTaggedPointerField( scratch, FieldMemOperand(feedback_vector, HeapObject::kMapOffset)); __ Lhu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); __ Branch(&install_baseline_code, ne, scratch, Operand(FEEDBACK_VECTOR_TYPE)); // Check for an tiering state. LoadTieringStateAndJumpIfNeedsProcessing(masm, optimization_state, feedback_vector, &has_optimized_code_or_state); // Load the baseline code into the closure. __ Move(a2, kInterpreterBytecodeArrayRegister); static_assert(kJavaScriptCallCodeStartRegister == a2, "ABI mismatch"); ReplaceClosureCodeWithOptimizedCode(masm, a2, closure, scratch, scratch2); __ JumpCodeObject(a2); __ bind(&install_baseline_code); GenerateTailCallToReturnedCode(masm, Runtime::kInstallBaselineCode); } __ bind(&compile_lazy); GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); // Unreachable code. __ break_(0xCC); __ bind(&stack_overflow); __ CallRuntime(Runtime::kThrowStackOverflow); // Unreachable code. __ break_(0xCC); } static void GenerateInterpreterPushArgs(MacroAssembler* masm, Register num_args, Register start_address, Register scratch) { ASM_CODE_COMMENT(masm); // Find the address of the last argument. __ Sub64(scratch, num_args, Operand(1)); __ Sll64(scratch, scratch, kSystemPointerSizeLog2); __ Sub64(start_address, start_address, scratch); // Push the arguments. __ PushArray(start_address, num_args, TurboAssembler::PushArrayOrder::kReverse); } // static void Builtins::Generate_InterpreterPushArgsThenCallImpl( MacroAssembler* masm, ConvertReceiverMode receiver_mode, InterpreterPushArgsMode mode) { DCHECK(mode != InterpreterPushArgsMode::kArrayFunction); // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a2 : the address of the first argument to be pushed. Subsequent // arguments should be consecutive above this, in the same order as // they are to be pushed onto the stack. // -- a1 : the target to call (can be any Object). // ----------------------------------- Label stack_overflow; if (mode == InterpreterPushArgsMode::kWithFinalSpread) { // The spread argument should not be pushed. __ Sub64(a0, a0, Operand(1)); } if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) { __ Sub64(a3, a0, Operand(kJSArgcReceiverSlots)); } else { __ Move(a3, a0); } __ StackOverflowCheck(a3, a4, t0, &stack_overflow); // This function modifies a2 and a4. GenerateInterpreterPushArgs(masm, a3, a2, a4); if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) { __ PushRoot(RootIndex::kUndefinedValue); } if (mode == InterpreterPushArgsMode::kWithFinalSpread) { // Pass the spread in the register a2. // a2 already points to the penultime argument, the spread // is below that. __ Ld(a2, MemOperand(a2, -kSystemPointerSize)); } // Call the target. if (mode == InterpreterPushArgsMode::kWithFinalSpread) { __ Jump(BUILTIN_CODE(masm->isolate(), CallWithSpread), RelocInfo::CODE_TARGET); } else { __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny), RelocInfo::CODE_TARGET); } __ bind(&stack_overflow); { __ TailCallRuntime(Runtime::kThrowStackOverflow); // Unreachable code. __ break_(0xCC); } } // static void Builtins::Generate_InterpreterPushArgsThenConstructImpl( MacroAssembler* masm, InterpreterPushArgsMode mode) { // ----------- S t a t e ------------- // -- a0 : argument count // -- a3 : new target // -- a1 : constructor to call // -- a2 : allocation site feedback if available, undefined otherwise. // -- a4 : address of the first argument // ----------------------------------- Label stack_overflow; __ StackOverflowCheck(a0, a5, t0, &stack_overflow); if (mode == InterpreterPushArgsMode::kWithFinalSpread) { // The spread argument should not be pushed. __ Sub64(a0, a0, Operand(1)); } Register argc_without_receiver = a6; __ Sub64(argc_without_receiver, a0, Operand(kJSArgcReceiverSlots)); // Push the arguments, This function modifies a4 and a5. GenerateInterpreterPushArgs(masm, argc_without_receiver, a4, a5); // Push a slot for the receiver. __ push(zero_reg); if (mode == InterpreterPushArgsMode::kWithFinalSpread) { // Pass the spread in the register a2. // a4 already points to the penultimate argument, the spread // lies in the next interpreter register. __ Ld(a2, MemOperand(a4, -kSystemPointerSize)); } else { __ AssertUndefinedOrAllocationSite(a2, t0); } if (mode == InterpreterPushArgsMode::kArrayFunction) { __ AssertFunction(a1); // Tail call to the function-specific construct stub (still in the caller // context at this point). __ Jump(BUILTIN_CODE(masm->isolate(), ArrayConstructorImpl), RelocInfo::CODE_TARGET); } else if (mode == InterpreterPushArgsMode::kWithFinalSpread) { // Call the constructor with a0, a1, and a3 unmodified. __ Jump(BUILTIN_CODE(masm->isolate(), ConstructWithSpread), RelocInfo::CODE_TARGET); } else { DCHECK_EQ(InterpreterPushArgsMode::kOther, mode); // Call the constructor with a0, a1, and a3 unmodified. __ Jump(BUILTIN_CODE(masm->isolate(), Construct), RelocInfo::CODE_TARGET); } __ bind(&stack_overflow); { __ TailCallRuntime(Runtime::kThrowStackOverflow); // Unreachable code. __ break_(0xCC); } } static void Generate_InterpreterEnterBytecode(MacroAssembler* masm) { // Set the return address to the correct point in the interpreter entry // trampoline. Label builtin_trampoline, trampoline_loaded; Smi interpreter_entry_return_pc_offset( masm->isolate()->heap()->interpreter_entry_return_pc_offset()); DCHECK_NE(interpreter_entry_return_pc_offset, Smi::zero()); // If the SFI function_data is an InterpreterData, the function will have a // custom copy of the interpreter entry trampoline for profiling. If so, // get the custom trampoline, otherwise grab the entry address of the global // trampoline. __ Ld(t0, MemOperand(fp, StandardFrameConstants::kFunctionOffset)); __ LoadTaggedPointerField( t0, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset)); __ LoadTaggedPointerField( t0, FieldMemOperand(t0, SharedFunctionInfo::kFunctionDataOffset)); __ GetObjectType(t0, kInterpreterDispatchTableRegister, kInterpreterDispatchTableRegister); __ Branch(&builtin_trampoline, ne, kInterpreterDispatchTableRegister, Operand(INTERPRETER_DATA_TYPE), Label::Distance::kNear); __ LoadTaggedPointerField( t0, FieldMemOperand(t0, InterpreterData::kInterpreterTrampolineOffset)); __ Add64(t0, t0, Operand(Code::kHeaderSize - kHeapObjectTag)); __ BranchShort(&trampoline_loaded); __ bind(&builtin_trampoline); __ li(t0, ExternalReference:: address_of_interpreter_entry_trampoline_instruction_start( masm->isolate())); __ Ld(t0, MemOperand(t0)); __ bind(&trampoline_loaded); __ Add64(ra, t0, Operand(interpreter_entry_return_pc_offset.value())); // Initialize the dispatch table register. __ li(kInterpreterDispatchTableRegister, ExternalReference::interpreter_dispatch_table_address(masm->isolate())); // Get the bytecode array pointer from the frame. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); if (FLAG_debug_code) { // Check function data field is actually a BytecodeArray object. __ SmiTst(kInterpreterBytecodeArrayRegister, kScratchReg); __ Assert(ne, AbortReason::kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, kScratchReg, Operand(zero_reg)); __ GetObjectType(kInterpreterBytecodeArrayRegister, a1, a1); __ Assert(eq, AbortReason::kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, a1, Operand(BYTECODE_ARRAY_TYPE)); } // Get the target bytecode offset from the frame. __ SmiUntag(kInterpreterBytecodeOffsetRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); if (FLAG_debug_code) { Label okay; __ Branch(&okay, ge, kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag), Label::Distance::kNear); // Unreachable code. __ break_(0xCC); __ bind(&okay); } // Dispatch to the target bytecode. __ Add64(a1, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister); __ Lbu(a7, MemOperand(a1)); __ CalcScaledAddress(a1, kInterpreterDispatchTableRegister, a7, kSystemPointerSizeLog2); __ Ld(kJavaScriptCallCodeStartRegister, MemOperand(a1)); __ Jump(kJavaScriptCallCodeStartRegister); } void Builtins::Generate_InterpreterEnterAtNextBytecode(MacroAssembler* masm) { // Advance the current bytecode offset stored within the given interpreter // stack frame. This simulates what all bytecode handlers do upon completion // of the underlying operation. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); __ Ld(kInterpreterBytecodeOffsetRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); __ SmiUntag(kInterpreterBytecodeOffsetRegister); Label enter_bytecode, function_entry_bytecode; __ Branch(&function_entry_bytecode, eq, kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag + kFunctionEntryBytecodeOffset)); // Load the current bytecode. __ Add64(a1, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister); __ Lbu(a1, MemOperand(a1)); // Advance to the next bytecode. Label if_return; AdvanceBytecodeOffsetOrReturn(masm, kInterpreterBytecodeArrayRegister, kInterpreterBytecodeOffsetRegister, a1, a2, a3, a4, &if_return); __ bind(&enter_bytecode); // Convert new bytecode offset to a Smi and save in the stackframe. __ SmiTag(a2, kInterpreterBytecodeOffsetRegister); __ Sd(a2, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); Generate_InterpreterEnterBytecode(masm); __ bind(&function_entry_bytecode); // If the code deoptimizes during the implicit function entry stack interrupt // check, it will have a bailout ID of kFunctionEntryBytecodeOffset, which is // not a valid bytecode offset. Detect this case and advance to the first // actual bytecode. __ li(kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); __ Branch(&enter_bytecode); // We should never take the if_return path. __ bind(&if_return); __ Abort(AbortReason::kInvalidBytecodeAdvance); } void Builtins::Generate_InterpreterEnterAtBytecode(MacroAssembler* masm) { Generate_InterpreterEnterBytecode(masm); } namespace { void Generate_ContinueToBuiltinHelper(MacroAssembler* masm, bool java_script_builtin, bool with_result) { const RegisterConfiguration* config(RegisterConfiguration::Default()); int allocatable_register_count = config->num_allocatable_general_registers(); UseScratchRegisterScope temp(masm); Register scratch = temp.Acquire(); if (with_result) { if (java_script_builtin) { __ Move(scratch, a0); } else { // Overwrite the hole inserted by the deoptimizer with the return value // from the LAZY deopt point. __ Sd(a0, MemOperand(sp, config->num_allocatable_general_registers() * kSystemPointerSize + BuiltinContinuationFrameConstants::kFixedFrameSize)); } } for (int i = allocatable_register_count - 1; i >= 0; --i) { int code = config->GetAllocatableGeneralCode(i); __ Pop(Register::from_code(code)); if (java_script_builtin && code == kJavaScriptCallArgCountRegister.code()) { __ SmiUntag(Register::from_code(code)); } } if (with_result && java_script_builtin) { // Overwrite the hole inserted by the deoptimizer with the return value from // the LAZY deopt point. t0 contains the arguments count, the return value // from LAZY is always the last argument. constexpr int return_value_offset = BuiltinContinuationFrameConstants::kFixedSlotCount - kJSArgcReceiverSlots; __ Add64(a0, a0, Operand(return_value_offset)); __ CalcScaledAddress(t0, sp, a0, kSystemPointerSizeLog2); __ Sd(scratch, MemOperand(t0)); // Recover arguments count. __ Sub64(a0, a0, Operand(return_value_offset)); } __ Ld(fp, MemOperand( sp, BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp)); // Load builtin index (stored as a Smi) and use it to get the builtin start // address from the builtins table. __ Pop(t6); __ Add64(sp, sp, Operand(BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp)); __ Pop(ra); __ LoadEntryFromBuiltinIndex(t6); __ Jump(t6); } } // namespace void Builtins::Generate_ContinueToCodeStubBuiltin(MacroAssembler* masm) { Generate_ContinueToBuiltinHelper(masm, false, false); } void Builtins::Generate_ContinueToCodeStubBuiltinWithResult( MacroAssembler* masm) { Generate_ContinueToBuiltinHelper(masm, false, true); } void Builtins::Generate_ContinueToJavaScriptBuiltin(MacroAssembler* masm) { Generate_ContinueToBuiltinHelper(masm, true, false); } void Builtins::Generate_ContinueToJavaScriptBuiltinWithResult( MacroAssembler* masm) { Generate_ContinueToBuiltinHelper(masm, true, true); } void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { { FrameScope scope(masm, StackFrame::INTERNAL); __ CallRuntime(Runtime::kNotifyDeoptimized); } DCHECK_EQ(kInterpreterAccumulatorRegister.code(), a0.code()); __ Ld(a0, MemOperand(sp, 0 * kSystemPointerSize)); __ Add64(sp, sp, Operand(1 * kSystemPointerSize)); // Remove state. __ Ret(); } namespace { void Generate_OSREntry(MacroAssembler* masm, Register entry_address, Operand offset = Operand(int64_t(0))) { __ Add64(ra, entry_address, offset); // And "return" to the OSR entry point of the function. __ Ret(); } void OnStackReplacement(MacroAssembler* masm, bool is_interpreter) { ASM_CODE_COMMENT(masm); { FrameScope scope(masm, StackFrame::INTERNAL); __ CallRuntime(Runtime::kCompileOptimizedOSR); } // If the code object is null, just return to the caller. __ Ret(eq, a0, Operand(Smi::zero())); if (is_interpreter) { // Drop the handler frame that is be sitting on top of the actual // JavaScript frame. This is the case then OSR is triggered from bytecode. __ LeaveFrame(StackFrame::STUB); } // Load deoptimization data from the code object. // = [#deoptimization_data_offset] __ LoadTaggedPointerField( a1, MemOperand(a0, Code::kDeoptimizationDataOrInterpreterDataOffset - kHeapObjectTag)); // Load the OSR entrypoint offset from the deoptimization data. // = [#header_size + #osr_pc_offset] __ SmiUntag(a1, MemOperand(a1, FixedArray::OffsetOfElementAt( DeoptimizationData::kOsrPcOffsetIndex) - kHeapObjectTag)); // Compute the target address = code_obj + header_size + osr_offset // = + #header_size + __ Add64(a0, a0, a1); Generate_OSREntry(masm, a0, Operand(Code::kHeaderSize - kHeapObjectTag)); } } // namespace void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) { return OnStackReplacement(masm, true); } void Builtins::Generate_BaselineOnStackReplacement(MacroAssembler* masm) { __ Ld(kContextRegister, MemOperand(fp, StandardFrameConstants::kContextOffset)); return OnStackReplacement(masm, false); } // static void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : argc // -- sp[0] : receiver // -- sp[4] : thisArg // -- sp[8] : argArray // ----------------------------------- Register argc = a0; Register arg_array = a2; Register receiver = a1; Register this_arg = a5; Register undefined_value = a3; __ LoadRoot(undefined_value, RootIndex::kUndefinedValue); // 1. Load receiver into a1, argArray into a2 (if present), remove all // arguments from the stack (including the receiver), and push thisArg (if // present) instead. { // Claim (2 - argc) dummy arguments form the stack, to put the stack in a // consistent state for a simple pop operation. __ Ld(this_arg, MemOperand(sp, kSystemPointerSize)); __ Ld(arg_array, MemOperand(sp, 2 * kSystemPointerSize)); Label done0, done1; UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ Sub64(scratch, argc, JSParameterCount(0)); __ Branch(&done0, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ Move(arg_array, undefined_value); // if argc == 0 __ Move(this_arg, undefined_value); // if argc == 0 __ bind(&done0); // else (i.e., argc > 0) __ Branch(&done1, ne, scratch, Operand(1), Label::Distance::kNear); __ Move(arg_array, undefined_value); // if argc == 1 __ bind(&done1); // else (i.e., argc > 1) __ Ld(receiver, MemOperand(sp)); __ DropArgumentsAndPushNewReceiver(argc, this_arg, MacroAssembler::kCountIsInteger, MacroAssembler::kCountIncludesReceiver); } // ----------- S t a t e ------------- // -- a2 : argArray // -- a1 : receiver // -- a3 : undefined root value // -- sp[0] : thisArg // ----------------------------------- // 2. We don't need to check explicitly for callable receiver here, // since that's the first thing the Call/CallWithArrayLike builtins // will do. // 3. Tail call with no arguments if argArray is null or undefined. Label no_arguments; __ JumpIfRoot(arg_array, RootIndex::kNullValue, &no_arguments); __ Branch(&no_arguments, eq, arg_array, Operand(undefined_value), Label::Distance::kNear); // 4a. Apply the receiver to the given argArray. __ Jump(BUILTIN_CODE(masm->isolate(), CallWithArrayLike), RelocInfo::CODE_TARGET); // 4b. The argArray is either null or undefined, so we tail call without any // arguments to the receiver. __ bind(&no_arguments); { __ li(a0, JSParameterCount(0)); DCHECK(receiver == a1); __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); } } // static void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { // 1. Get the callable to call (passed as receiver) from the stack. { __ Pop(a1); } // 2. Make sure we have at least one argument. // a0: actual number of arguments { Label done; __ Branch(&done, ne, a0, Operand(JSParameterCount(0)), Label::Distance::kNear); __ PushRoot(RootIndex::kUndefinedValue); __ Add64(a0, a0, Operand(1)); __ bind(&done); } // 3. Adjust the actual number of arguments. __ Add64(a0, a0, -1); // 4. Call the callable. __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); } void Builtins::Generate_ReflectApply(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : argc // -- sp[0] : receiver // -- sp[8] : target (if argc >= 1) // -- sp[16] : thisArgument (if argc >= 2) // -- sp[24] : argumentsList (if argc == 3) // ----------------------------------- Register argc = a0; Register arguments_list = a2; Register target = a1; Register this_argument = a5; Register undefined_value = a3; __ LoadRoot(undefined_value, RootIndex::kUndefinedValue); // 1. Load target into a1 (if present), argumentsList into a2 (if present), // remove all arguments from the stack (including the receiver), and push // thisArgument (if present) instead. { // Claim (3 - argc) dummy arguments form the stack, to put the stack in a // consistent state for a simple pop operation. __ Ld(target, MemOperand(sp, kSystemPointerSize)); __ Ld(this_argument, MemOperand(sp, 2 * kSystemPointerSize)); __ Ld(arguments_list, MemOperand(sp, 3 * kSystemPointerSize)); Label done0, done1, done2; UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ Sub64(scratch, argc, Operand(JSParameterCount(0))); __ Branch(&done0, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ Move(arguments_list, undefined_value); // if argc == 0 __ Move(this_argument, undefined_value); // if argc == 0 __ Move(target, undefined_value); // if argc == 0 __ bind(&done0); // argc != 0 __ Branch(&done1, ne, scratch, Operand(1), Label::Distance::kNear); __ Move(arguments_list, undefined_value); // if argc == 1 __ Move(this_argument, undefined_value); // if argc == 1 __ bind(&done1); // argc > 1 __ Branch(&done2, ne, scratch, Operand(2), Label::Distance::kNear); __ Move(arguments_list, undefined_value); // if argc == 2 __ bind(&done2); // argc > 2 __ DropArgumentsAndPushNewReceiver(argc, this_argument, MacroAssembler::kCountIsInteger, MacroAssembler::kCountIncludesReceiver); } // ----------- S t a t e ------------- // -- a2 : argumentsList // -- a1 : target // -- a3 : undefined root value // -- sp[0] : thisArgument // ----------------------------------- // 2. We don't need to check explicitly for callable target here, // since that's the first thing the Call/CallWithArrayLike builtins // will do. // 3. Apply the target to the given argumentsList. __ Jump(BUILTIN_CODE(masm->isolate(), CallWithArrayLike), RelocInfo::CODE_TARGET); } void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : argc // -- sp[0] : receiver // -- sp[8] : target // -- sp[16] : argumentsList // -- sp[24] : new.target (optional) // ----------------------------------- Register argc = a0; Register arguments_list = a2; Register target = a1; Register new_target = a3; Register undefined_value = a4; __ LoadRoot(undefined_value, RootIndex::kUndefinedValue); // 1. Load target into a1 (if present), argumentsList into a2 (if present), // new.target into a3 (if present, otherwise use target), remove all // arguments from the stack (including the receiver), and push thisArgument // (if present) instead. { // Claim (3 - argc) dummy arguments form the stack, to put the stack in a // consistent state for a simple pop operation. __ Ld(target, MemOperand(sp, kSystemPointerSize)); __ Ld(arguments_list, MemOperand(sp, 2 * kSystemPointerSize)); __ Ld(new_target, MemOperand(sp, 3 * kSystemPointerSize)); Label done0, done1, done2; UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ Sub64(scratch, argc, Operand(JSParameterCount(0))); __ Branch(&done0, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ Move(arguments_list, undefined_value); // if argc == 0 __ Move(new_target, undefined_value); // if argc == 0 __ Move(target, undefined_value); // if argc == 0 __ bind(&done0); __ Branch(&done1, ne, scratch, Operand(1), Label::Distance::kNear); __ Move(arguments_list, undefined_value); // if argc == 1 __ Move(new_target, target); // if argc == 1 __ bind(&done1); __ Branch(&done2, ne, scratch, Operand(2), Label::Distance::kNear); __ Move(new_target, target); // if argc == 2 __ bind(&done2); __ DropArgumentsAndPushNewReceiver(argc, undefined_value, MacroAssembler::kCountIsInteger, MacroAssembler::kCountIncludesReceiver); } // ----------- S t a t e ------------- // -- a2 : argumentsList // -- a1 : target // -- a3 : new.target // -- sp[0] : receiver (undefined) // ----------------------------------- // 2. We don't need to check explicitly for constructor target here, // since that's the first thing the Construct/ConstructWithArrayLike // builtins will do. // 3. We don't need to check explicitly for constructor new.target here, // since that's the second thing the Construct/ConstructWithArrayLike // builtins will do. // 4. Construct the target with the given new.target and argumentsList. __ Jump(BUILTIN_CODE(masm->isolate(), ConstructWithArrayLike), RelocInfo::CODE_TARGET); } namespace { // Allocate new stack space for |count| arguments and shift all existing // arguments already on the stack. |pointer_to_new_space_out| points to the // first free slot on the stack to copy additional arguments to and // |argc_in_out| is updated to include |count|. void Generate_AllocateSpaceAndShiftExistingArguments( MacroAssembler* masm, Register count, Register argc_in_out, Register pointer_to_new_space_out) { UseScratchRegisterScope temps(masm); Register scratch1 = temps.Acquire(); Register scratch2 = temps.Acquire(); Register scratch3 = temps.Acquire(); DCHECK(!AreAliased(count, argc_in_out, pointer_to_new_space_out, scratch1, scratch2)); Register old_sp = scratch1; Register new_space = scratch2; __ mv(old_sp, sp); __ slli(new_space, count, kPointerSizeLog2); __ Sub64(sp, sp, Operand(new_space)); Register end = scratch2; Register value = scratch3; Register dest = pointer_to_new_space_out; __ mv(dest, sp); __ CalcScaledAddress(end, old_sp, argc_in_out, kSystemPointerSizeLog2); Label loop, done; __ Branch(&done, ge, old_sp, Operand(end)); __ bind(&loop); __ Ld(value, MemOperand(old_sp, 0)); __ Sd(value, MemOperand(dest, 0)); __ Add64(old_sp, old_sp, Operand(kSystemPointerSize)); __ Add64(dest, dest, Operand(kSystemPointerSize)); __ Branch(&loop, lt, old_sp, Operand(end)); __ bind(&done); // Update total number of arguments. __ Add64(argc_in_out, argc_in_out, count); } } // namespace // static void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm, Handle code) { UseScratchRegisterScope temps(masm); temps.Include(t1, t0); // ----------- S t a t e ------------- // -- a1 : target // -- a0 : number of parameters on the stack // -- a2 : arguments list (a FixedArray) // -- a4 : len (number of elements to push from args) // -- a3 : new.target (for [[Construct]]) // ----------------------------------- if (FLAG_debug_code) { // Allow a2 to be a FixedArray, or a FixedDoubleArray if a4 == 0. Label ok, fail; __ AssertNotSmi(a2); __ GetObjectType(a2, kScratchReg, kScratchReg); __ Branch(&ok, eq, kScratchReg, Operand(FIXED_ARRAY_TYPE), Label::Distance::kNear); __ Branch(&fail, ne, kScratchReg, Operand(FIXED_DOUBLE_ARRAY_TYPE), Label::Distance::kNear); __ Branch(&ok, eq, a4, Operand(zero_reg), Label::Distance::kNear); // Fall through. __ bind(&fail); __ Abort(AbortReason::kOperandIsNotAFixedArray); __ bind(&ok); } Register args = a2; Register len = a4; // Check for stack overflow. Label stack_overflow; __ StackOverflowCheck(len, kScratchReg, a5, &stack_overflow); // Move the arguments already in the stack, // including the receiver and the return address. // a4: Number of arguments to make room for. // a0: Number of arguments already on the stack. // a7: Points to first free slot on the stack after arguments were shifted. Generate_AllocateSpaceAndShiftExistingArguments(masm, a4, a0, a7); // Push arguments onto the stack (thisArgument is already on the stack). { Label done, push, loop; Register src = a6; Register scratch = len; UseScratchRegisterScope temps(masm); Register hole_value = temps.Acquire(); __ Add64(src, args, FixedArray::kHeaderSize - kHeapObjectTag); __ Branch(&done, eq, len, Operand(zero_reg), Label::Distance::kNear); __ Sll64(scratch, len, kTaggedSizeLog2); __ Sub64(scratch, sp, Operand(scratch)); __ LoadRoot(hole_value, RootIndex::kTheHoleValue); __ bind(&loop); __ LoadTaggedPointerField(a5, MemOperand(src)); __ Add64(src, src, kTaggedSize); __ Branch(&push, ne, a5, Operand(hole_value), Label::Distance::kNear); __ LoadRoot(a5, RootIndex::kUndefinedValue); __ bind(&push); __ Sd(a5, MemOperand(a7, 0)); __ Add64(a7, a7, Operand(kSystemPointerSize)); __ Add64(scratch, scratch, Operand(kTaggedSize)); __ Branch(&loop, ne, scratch, Operand(sp)); __ bind(&done); } // Tail-call to the actual Call or Construct builtin. __ Jump(code, RelocInfo::CODE_TARGET); __ bind(&stack_overflow); __ TailCallRuntime(Runtime::kThrowStackOverflow); } // static void Builtins::Generate_CallOrConstructForwardVarargs(MacroAssembler* masm, CallOrConstructMode mode, Handle code) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a3 : the new.target (for [[Construct]] calls) // -- a1 : the target to call (can be any Object) // -- a2 : start index (to support rest parameters) // ----------------------------------- UseScratchRegisterScope temps(masm); temps.Include(t0, t1); temps.Include(t2); // Check if new.target has a [[Construct]] internal method. if (mode == CallOrConstructMode::kConstruct) { Label new_target_constructor, new_target_not_constructor; UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ JumpIfSmi(a3, &new_target_not_constructor); __ LoadTaggedPointerField(scratch, FieldMemOperand(a3, HeapObject::kMapOffset)); __ Lbu(scratch, FieldMemOperand(scratch, Map::kBitFieldOffset)); __ And(scratch, scratch, Operand(Map::Bits1::IsConstructorBit::kMask)); __ Branch(&new_target_constructor, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ bind(&new_target_not_constructor); { FrameScope scope(masm, StackFrame::MANUAL); __ EnterFrame(StackFrame::INTERNAL); __ Push(a3); __ CallRuntime(Runtime::kThrowNotConstructor); } __ bind(&new_target_constructor); } // TODO(victorgomes): Remove this copy when all the arguments adaptor frame // code is erased. __ Move(a6, fp); __ Ld(a7, MemOperand(fp, StandardFrameConstants::kArgCOffset)); Label stack_done, stack_overflow; __ Sub64(a7, a7, Operand(kJSArgcReceiverSlots)); __ Sub64(a7, a7, a2); __ Branch(&stack_done, le, a7, Operand(zero_reg)); { // Check for stack overflow. __ StackOverflowCheck(a7, a4, a5, &stack_overflow); // Forward the arguments from the caller frame. // Point to the first argument to copy (skipping the receiver). __ Add64(a6, a6, Operand(CommonFrameConstants::kFixedFrameSizeAboveFp + kSystemPointerSize)); __ CalcScaledAddress(a6, a6, a2, kSystemPointerSizeLog2); // Move the arguments already in the stack, // including the receiver and the return address. // a7: Number of arguments to make room for. // a0: Number of arguments already on the stack. // a2: Points to first free slot on the stack after arguments were shifted. Generate_AllocateSpaceAndShiftExistingArguments(masm, a7, a0, a2); // Copy arguments from the caller frame. // TODO(victorgomes): Consider using forward order as potentially more cache // friendly. { Label loop; __ bind(&loop); { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(), addr = temps.Acquire(); __ Sub32(a7, a7, Operand(1)); __ CalcScaledAddress(addr, a6, a7, kSystemPointerSizeLog2); __ Ld(scratch, MemOperand(addr)); __ CalcScaledAddress(addr, a2, a7, kSystemPointerSizeLog2); __ Sd(scratch, MemOperand(addr)); __ Branch(&loop, ne, a7, Operand(zero_reg)); } } } __ BranchShort(&stack_done); __ bind(&stack_overflow); __ TailCallRuntime(Runtime::kThrowStackOverflow); __ bind(&stack_done); // Tail-call to the {code} handler. __ Jump(code, RelocInfo::CODE_TARGET); } // static void Builtins::Generate_CallFunction(MacroAssembler* masm, ConvertReceiverMode mode) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the function to call (checked to be a JSFunction) // ----------------------------------- __ AssertCallableFunction(a1); Label class_constructor; __ LoadTaggedPointerField( a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); __ Lwu(a3, FieldMemOperand(a2, SharedFunctionInfo::kFlagsOffset)); __ And(kScratchReg, a3, Operand(SharedFunctionInfo::IsClassConstructorBit::kMask)); __ Branch(&class_constructor, ne, kScratchReg, Operand(zero_reg)); // Enter the context of the function; ToObject has to run in the function // context, and we also need to take the global proxy from the function // context in case of conversion. __ LoadTaggedPointerField(cp, FieldMemOperand(a1, JSFunction::kContextOffset)); // We need to convert the receiver for non-native sloppy mode functions. Label done_convert; __ Lwu(a3, FieldMemOperand(a2, SharedFunctionInfo::kFlagsOffset)); __ And(kScratchReg, a3, Operand(SharedFunctionInfo::IsNativeBit::kMask | SharedFunctionInfo::IsStrictBit::kMask)); __ Branch(&done_convert, ne, kScratchReg, Operand(zero_reg)); { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the function to call (checked to be a JSFunction) // -- a2 : the shared function info. // -- cp : the function context. // ----------------------------------- if (mode == ConvertReceiverMode::kNullOrUndefined) { // Patch receiver to global proxy. __ LoadGlobalProxy(a3); } else { Label convert_to_object, convert_receiver; __ LoadReceiver(a3, a0); __ JumpIfSmi(a3, &convert_to_object); STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); __ GetObjectType(a3, a4, a4); __ Branch(&done_convert, Ugreater_equal, a4, Operand(FIRST_JS_RECEIVER_TYPE)); if (mode != ConvertReceiverMode::kNotNullOrUndefined) { Label convert_global_proxy; __ JumpIfRoot(a3, RootIndex::kUndefinedValue, &convert_global_proxy); __ JumpIfNotRoot(a3, RootIndex::kNullValue, &convert_to_object); __ bind(&convert_global_proxy); { // Patch receiver to global proxy. __ LoadGlobalProxy(a3); } __ Branch(&convert_receiver); } __ bind(&convert_to_object); { // Convert receiver using ToObject. // TODO(bmeurer): Inline the allocation here to avoid building the frame // in the fast case? (fall back to AllocateInNewSpace?) FrameScope scope(masm, StackFrame::INTERNAL); __ SmiTag(a0); __ Push(a0, a1); __ Move(a0, a3); __ Push(cp); __ Call(BUILTIN_CODE(masm->isolate(), ToObject), RelocInfo::CODE_TARGET); __ Pop(cp); __ Move(a3, a0); __ Pop(a0, a1); __ SmiUntag(a0); } __ LoadTaggedPointerField( a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); __ bind(&convert_receiver); } __ StoreReceiver(a3, a0, kScratchReg); } __ bind(&done_convert); // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the function to call (checked to be a JSFunction) // -- a2 : the shared function info. // -- cp : the function context. // ----------------------------------- __ Lhu(a2, FieldMemOperand(a2, SharedFunctionInfo::kFormalParameterCountOffset)); __ InvokeFunctionCode(a1, no_reg, a2, a0, InvokeType::kJump); // The function is a "classConstructor", need to raise an exception. __ bind(&class_constructor); { FrameScope frame(masm, StackFrame::INTERNAL); __ Push(a1); __ CallRuntime(Runtime::kThrowConstructorNonCallableError); } } namespace { void Generate_PushBoundArguments(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : target (checked to be a JSBoundFunction) // -- a3 : new.target (only in case of [[Construct]]) // ----------------------------------- UseScratchRegisterScope temps(masm); temps.Include(t0, t1); Register bound_argc = a4; Register bound_argv = a2; // Load [[BoundArguments]] into a2 and length of that into a4. Label no_bound_arguments; __ LoadTaggedPointerField( bound_argv, FieldMemOperand(a1, JSBoundFunction::kBoundArgumentsOffset)); __ SmiUntagField(bound_argc, FieldMemOperand(bound_argv, FixedArray::kLengthOffset)); __ Branch(&no_bound_arguments, eq, bound_argc, Operand(zero_reg)); { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : target (checked to be a JSBoundFunction) // -- a2 : the [[BoundArguments]] (implemented as FixedArray) // -- a3 : new.target (only in case of [[Construct]]) // -- a4: the number of [[BoundArguments]] // ----------------------------------- UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); Label done; // Reserve stack space for the [[BoundArguments]]. { // Check the stack for overflow. We are not trying to catch interruptions // (i.e. debug break and preemption) here, so check the "real stack // limit". __ StackOverflowCheck(a4, temps.Acquire(), temps.Acquire(), nullptr, &done); { FrameScope scope(masm, StackFrame::MANUAL); __ EnterFrame(StackFrame::INTERNAL); __ CallRuntime(Runtime::kThrowStackOverflow); } __ bind(&done); } // Pop receiver. __ Pop(scratch); // Push [[BoundArguments]]. { Label loop, done_loop; __ SmiUntag(a4, FieldMemOperand(a2, FixedArray::kLengthOffset)); __ Add64(a0, a0, Operand(a4)); __ Add64(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); __ bind(&loop); __ Sub64(a4, a4, Operand(1)); __ Branch(&done_loop, lt, a4, Operand(zero_reg), Label::Distance::kNear); __ CalcScaledAddress(a5, a2, a4, kTaggedSizeLog2); __ LoadAnyTaggedField(kScratchReg, MemOperand(a5)); __ Push(kScratchReg); __ Branch(&loop); __ bind(&done_loop); } // Push receiver. __ Push(scratch); } __ bind(&no_bound_arguments); } } // namespace // static void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the function to call (checked to be a JSBoundFunction) // ----------------------------------- __ AssertBoundFunction(a1); // Patch the receiver to [[BoundThis]]. { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ LoadAnyTaggedField( scratch, FieldMemOperand(a1, JSBoundFunction::kBoundThisOffset)); __ StoreReceiver(scratch, a0, kScratchReg); } // Push the [[BoundArguments]] onto the stack. Generate_PushBoundArguments(masm); // Call the [[BoundTargetFunction]] via the Call builtin. __ LoadTaggedPointerField( a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset)); __ Jump(BUILTIN_CODE(masm->isolate(), Call_ReceiverIsAny), RelocInfo::CODE_TARGET); } // static void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the target to call (can be any Object). // ----------------------------------- Label non_callable, class_constructor; UseScratchRegisterScope temps(masm); temps.Include(t1, t2); temps.Include(t4); Register map = temps.Acquire(), type = temps.Acquire(), range = temps.Acquire(); __ JumpIfSmi(a1, &non_callable); __ LoadMap(map, a1); __ GetInstanceTypeRange(map, type, FIRST_CALLABLE_JS_FUNCTION_TYPE, range); __ Jump(masm->isolate()->builtins()->CallFunction(mode), RelocInfo::CODE_TARGET, Uless_equal, range, Operand(LAST_CALLABLE_JS_FUNCTION_TYPE - FIRST_CALLABLE_JS_FUNCTION_TYPE)); __ Jump(BUILTIN_CODE(masm->isolate(), CallBoundFunction), RelocInfo::CODE_TARGET, eq, type, Operand(JS_BOUND_FUNCTION_TYPE)); Register scratch = map; // Check if target has a [[Call]] internal method. __ Lbu(scratch, FieldMemOperand(map, Map::kBitFieldOffset)); __ And(scratch, scratch, Operand(Map::Bits1::IsCallableBit::kMask)); __ Branch(&non_callable, eq, scratch, Operand(zero_reg), Label::Distance::kNear); __ Jump(BUILTIN_CODE(masm->isolate(), CallProxy), RelocInfo::CODE_TARGET, eq, type, Operand(JS_PROXY_TYPE)); // Check if target is a wrapped function and call CallWrappedFunction external // builtin __ Jump(BUILTIN_CODE(masm->isolate(), CallWrappedFunction), RelocInfo::CODE_TARGET, eq, type, Operand(JS_WRAPPED_FUNCTION_TYPE)); // ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList) // Check that the function is not a "classConstructor". __ Branch(&class_constructor, eq, type, Operand(JS_CLASS_CONSTRUCTOR_TYPE)); // 2. Call to something else, which might have a [[Call]] internal method (if // not we raise an exception). // Overwrite the original receiver with the (original) target. __ StoreReceiver(a1, a0, kScratchReg); // Let the "call_as_function_delegate" take care of the rest. __ LoadNativeContextSlot(a1, Context::CALL_AS_FUNCTION_DELEGATE_INDEX); __ Jump(masm->isolate()->builtins()->CallFunction( ConvertReceiverMode::kNotNullOrUndefined), RelocInfo::CODE_TARGET); // 3. Call to something that is not callable. __ bind(&non_callable); { FrameScope scope(masm, StackFrame::INTERNAL); __ Push(a1); __ CallRuntime(Runtime::kThrowCalledNonCallable); } // 4. The function is a "classConstructor", need to raise an exception. __ bind(&class_constructor); { FrameScope frame(masm, StackFrame::INTERNAL); __ Push(a1); __ CallRuntime(Runtime::kThrowConstructorNonCallableError); __ ebreak(); } } void Builtins::Generate_ConstructFunction(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the constructor to call (checked to be a JSFunction) // -- a3 : the new target (checked to be a constructor) // ----------------------------------- __ AssertConstructor(a1); __ AssertFunction(a1); // Calling convention for function specific ConstructStubs require // a2 to contain either an AllocationSite or undefined. __ LoadRoot(a2, RootIndex::kUndefinedValue); Label call_generic_stub; // Jump to JSBuiltinsConstructStub or JSConstructStubGeneric. __ LoadTaggedPointerField( a4, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); __ Lwu(a4, FieldMemOperand(a4, SharedFunctionInfo::kFlagsOffset)); __ And(a4, a4, Operand(SharedFunctionInfo::ConstructAsBuiltinBit::kMask)); __ Branch(&call_generic_stub, eq, a4, Operand(zero_reg), Label::Distance::kNear); __ Jump(BUILTIN_CODE(masm->isolate(), JSBuiltinsConstructStub), RelocInfo::CODE_TARGET); __ bind(&call_generic_stub); __ Jump(BUILTIN_CODE(masm->isolate(), JSConstructStubGeneric), RelocInfo::CODE_TARGET); } // static void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the function to call (checked to be a JSBoundFunction) // -- a3 : the new target (checked to be a constructor) // ----------------------------------- __ AssertBoundFunction(a1); // Push the [[BoundArguments]] onto the stack. Generate_PushBoundArguments(masm); // Patch new.target to [[BoundTargetFunction]] if new.target equals target. Label skip; { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ CmpTagged(scratch, a1, a3); __ Branch(&skip, ne, scratch, Operand(zero_reg), Label::Distance::kNear); } __ LoadTaggedPointerField( a3, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset)); __ bind(&skip); // Construct the [[BoundTargetFunction]] via the Construct builtin. __ LoadTaggedPointerField( a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset)); __ Jump(BUILTIN_CODE(masm->isolate(), Construct), RelocInfo::CODE_TARGET); } // static void Builtins::Generate_Construct(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- a0 : the number of arguments // -- a1 : the constructor to call (can be any Object) // -- a3 : the new target (either the same as the constructor or // the JSFunction on which new was invoked initially) // ----------------------------------- // Check if target is a Smi. Label non_constructor, non_proxy; __ JumpIfSmi(a1, &non_constructor); // Check if target has a [[Construct]] internal method. UseScratchRegisterScope temps(masm); temps.Include(t0, t1); Register map = temps.Acquire(); Register scratch = temps.Acquire(); __ LoadTaggedPointerField(map, FieldMemOperand(a1, HeapObject::kMapOffset)); __ Lbu(scratch, FieldMemOperand(map, Map::kBitFieldOffset)); __ And(scratch, scratch, Operand(Map::Bits1::IsConstructorBit::kMask)); __ Branch(&non_constructor, eq, scratch, Operand(zero_reg)); Register range = temps.Acquire(); // Dispatch based on instance type. __ GetInstanceTypeRange(map, scratch, FIRST_JS_FUNCTION_TYPE, range); __ Jump(BUILTIN_CODE(masm->isolate(), ConstructFunction), RelocInfo::CODE_TARGET, Uless_equal, range, Operand(LAST_JS_FUNCTION_TYPE - FIRST_JS_FUNCTION_TYPE)); // Only dispatch to bound functions after checking whether they are // constructors. __ Jump(BUILTIN_CODE(masm->isolate(), ConstructBoundFunction), RelocInfo::CODE_TARGET, eq, scratch, Operand(JS_BOUND_FUNCTION_TYPE)); // Only dispatch to proxies after checking whether they are constructors. __ Branch(&non_proxy, ne, scratch, Operand(JS_PROXY_TYPE), Label::Distance::kNear); __ Jump(BUILTIN_CODE(masm->isolate(), ConstructProxy), RelocInfo::CODE_TARGET); // Called Construct on an exotic Object with a [[Construct]] internal method. __ bind(&non_proxy); { // Overwrite the original receiver with the (original) target. __ StoreReceiver(a1, a0, kScratchReg); // Let the "call_as_constructor_delegate" take care of the rest. __ LoadNativeContextSlot(a1, Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX); __ Jump(masm->isolate()->builtins()->CallFunction(), RelocInfo::CODE_TARGET); } // Called Construct on an Object that doesn't have a [[Construct]] internal // method. __ bind(&non_constructor); __ Jump(BUILTIN_CODE(masm->isolate(), ConstructedNonConstructable), RelocInfo::CODE_TARGET); } #if V8_ENABLE_WEBASSEMBLY void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) { // The function index was put in t0 by the jump table trampoline. // Convert to Smi for the runtime call __ SmiTag(kWasmCompileLazyFuncIndexRegister); RegList kSavedGpRegs = ([]() constexpr { RegList saved_gp_regs; for (Register gp_param_reg : wasm::kGpParamRegisters) { saved_gp_regs.set(gp_param_reg); } // All set registers were unique. CHECK_EQ(saved_gp_regs.Count(), arraysize(wasm::kGpParamRegisters)); // The Wasm instance must be part of the saved registers. CHECK(saved_gp_regs.has(kWasmInstanceRegister)); CHECK_EQ(WasmCompileLazyFrameConstants::kNumberOfSavedGpParamRegs, saved_gp_regs.Count()); return saved_gp_regs; })(); DoubleRegList kSavedFpRegs = ([]() constexpr { DoubleRegList saved_fp_regs; for (DoubleRegister fp_param_reg : wasm::kFpParamRegisters) { saved_fp_regs.set(fp_param_reg); } CHECK_EQ(saved_fp_regs.Count(), arraysize(wasm::kFpParamRegisters)); CHECK_EQ(WasmCompileLazyFrameConstants::kNumberOfSavedFpParamRegs, saved_fp_regs.Count()); return saved_fp_regs; })(); { HardAbortScope hard_abort(masm); // Avoid calls to Abort. FrameScope scope(masm, StackFrame::WASM_COMPILE_LAZY); __ MultiPush(kSavedGpRegs); __ MultiPushFPU(kSavedFpRegs); // Pass instance and function index as an explicit arguments to the runtime // function. __ Push(kWasmInstanceRegister, kWasmCompileLazyFuncIndexRegister); // Initialize the JavaScript context with 0. CEntry will use it to // set the current context on the isolate. __ Move(kContextRegister, Smi::zero()); __ CallRuntime(Runtime::kWasmCompileLazy, 2); __ SmiUntag(s1, a0); // move return value to s1 since a0 will be restored // to the value before the call CHECK(!kSavedGpRegs.has(s1)); // Restore registers. __ MultiPopFPU(kSavedFpRegs); __ MultiPop(kSavedGpRegs); } // The runtime function returned the jump table slot offset as a Smi (now in // x17). Use that to compute the jump target. __ Ld(kScratchReg, MemOperand(kWasmInstanceRegister, WasmInstanceObject::kJumpTableStartOffset - kHeapObjectTag)); __ Add64(s1, s1, Operand(kScratchReg)); // Finally, jump to the entrypoint. __ Jump(s1); } void Builtins::Generate_WasmDebugBreak(MacroAssembler* masm) { HardAbortScope hard_abort(masm); // Avoid calls to Abort. { FrameScope scope(masm, StackFrame::WASM_DEBUG_BREAK); // Save all parameter registers. They might hold live values, we restore // them after the runtime call. __ MultiPush(WasmDebugBreakFrameConstants::kPushedGpRegs); __ MultiPushFPU(WasmDebugBreakFrameConstants::kPushedFpRegs); // Initialize the JavaScript context with 0. CEntry will use it to // set the current context on the isolate. __ Move(cp, Smi::zero()); __ CallRuntime(Runtime::kWasmDebugBreak, 0); // Restore registers. __ MultiPopFPU(WasmDebugBreakFrameConstants::kPushedFpRegs); __ MultiPop(WasmDebugBreakFrameConstants::kPushedGpRegs); } __ Ret(); } #endif // V8_ENABLE_WEBASSEMBLY void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size, SaveFPRegsMode save_doubles, ArgvMode argv_mode, bool builtin_exit_frame) { // Called from JavaScript; parameters are on stack as if calling JS function // a0: number of arguments including receiver // a1: pointer to builtin function // fp: frame pointer (restored after C call) // sp: stack pointer (restored as callee's sp after C call) // cp: current context (C callee-saved) // // If argv_mode == ArgvMode::kRegister: // a2: pointer to the first argument if (argv_mode == ArgvMode::kRegister) { // Move argv into the correct register. __ Move(s1, a2); } else { // Compute the argv pointer in a callee-saved register. __ CalcScaledAddress(s1, sp, a0, kSystemPointerSizeLog2); __ Sub64(s1, s1, kSystemPointerSize); } // Enter the exit frame that transitions from JavaScript to C++. FrameScope scope(masm, StackFrame::MANUAL); __ EnterExitFrame( save_doubles == SaveFPRegsMode::kSave, 0, builtin_exit_frame ? StackFrame::BUILTIN_EXIT : StackFrame::EXIT); // s3: number of arguments including receiver (C callee-saved) // s1: pointer to first argument (C callee-saved) // s2: pointer to builtin function (C callee-saved) // Prepare arguments for C routine. // a0 = argc __ Move(s3, a0); __ Move(s2, a1); // We are calling compiled C/C++ code. a0 and a1 hold our two arguments. We // also need to reserve the 4 argument slots on the stack. __ AssertStackIsAligned(); // a0 = argc, a1 = argv, a2 = isolate __ li(a2, ExternalReference::isolate_address(masm->isolate())); __ Move(a1, s1); __ StoreReturnAddressAndCall(s2); // Result returned in a0 or a1:a0 - do not destroy these registers! // Check result for exception sentinel. Label exception_returned; __ LoadRoot(a4, RootIndex::kException); __ Branch(&exception_returned, eq, a4, Operand(a0)); // Check that there is no pending exception, otherwise we // should have returned the exception sentinel. if (FLAG_debug_code) { Label okay; ExternalReference pending_exception_address = ExternalReference::Create( IsolateAddressId::kPendingExceptionAddress, masm->isolate()); __ li(a2, pending_exception_address); __ Ld(a2, MemOperand(a2)); __ LoadRoot(a4, RootIndex::kTheHoleValue); // Cannot use check here as it attempts to generate call into runtime. __ Branch(&okay, eq, a4, Operand(a2), Label::Distance::kNear); __ stop(); __ bind(&okay); } // Exit C frame and return. // a0:a1: result // sp: stack pointer // fp: frame pointer Register argc = argv_mode == ArgvMode::kRegister // We don't want to pop arguments so set argc to no_reg. ? no_reg // s3: still holds argc (callee-saved). : s3; __ LeaveExitFrame(save_doubles == SaveFPRegsMode::kSave, argc, EMIT_RETURN); // Handling of exception. __ bind(&exception_returned); ExternalReference pending_handler_context_address = ExternalReference::Create( IsolateAddressId::kPendingHandlerContextAddress, masm->isolate()); ExternalReference pending_handler_entrypoint_address = ExternalReference::Create( IsolateAddressId::kPendingHandlerEntrypointAddress, masm->isolate()); ExternalReference pending_handler_fp_address = ExternalReference::Create( IsolateAddressId::kPendingHandlerFPAddress, masm->isolate()); ExternalReference pending_handler_sp_address = ExternalReference::Create( IsolateAddressId::kPendingHandlerSPAddress, masm->isolate()); // Ask the runtime for help to determine the handler. This will set a0 to // contain the current pending exception, don't clobber it. ExternalReference find_handler = ExternalReference::Create(Runtime::kUnwindAndFindExceptionHandler); { FrameScope scope(masm, StackFrame::MANUAL); __ PrepareCallCFunction(3, 0, a0); __ Move(a0, zero_reg); __ Move(a1, zero_reg); __ li(a2, ExternalReference::isolate_address(masm->isolate())); __ CallCFunction(find_handler, 3); } // Retrieve the handler context, SP and FP. __ li(cp, pending_handler_context_address); __ Ld(cp, MemOperand(cp)); __ li(sp, pending_handler_sp_address); __ Ld(sp, MemOperand(sp)); __ li(fp, pending_handler_fp_address); __ Ld(fp, MemOperand(fp)); // If the handler is a JS frame, restore the context to the frame. Note that // the context will be set to (cp == 0) for non-JS frames. Label zero; __ Branch(&zero, eq, cp, Operand(zero_reg), Label::Distance::kNear); __ Sd(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); __ bind(&zero); // Compute the handler entry address and jump to it. UseScratchRegisterScope temp(masm); Register scratch = temp.Acquire(); __ li(scratch, pending_handler_entrypoint_address); __ Ld(scratch, MemOperand(scratch)); __ Jump(scratch); } void Builtins::Generate_DoubleToI(MacroAssembler* masm) { Label done; Register result_reg = t0; Register scratch = GetRegisterThatIsNotOneOf(result_reg); Register scratch2 = GetRegisterThatIsNotOneOf(result_reg, scratch); Register scratch3 = GetRegisterThatIsNotOneOf(result_reg, scratch, scratch2); DoubleRegister double_scratch = kScratchDoubleReg; // Account for saved regs. const int kArgumentOffset = 4 * kSystemPointerSize; __ Push(result_reg); __ Push(scratch, scratch2, scratch3); // Load double input. __ LoadDouble(double_scratch, MemOperand(sp, kArgumentOffset)); // Try a conversion to a signed integer, if exception occurs, scratch is // set to 0 __ Trunc_w_d(scratch3, double_scratch, scratch); // If we had no exceptions then set result_reg and we are done. Label error; __ Branch(&error, eq, scratch, Operand(zero_reg), Label::Distance::kNear); __ Move(result_reg, scratch3); __ Branch(&done); __ bind(&error); // Load the double value and perform a manual truncation. Register input_high = scratch2; Register input_low = scratch3; __ Lw(input_low, MemOperand(sp, kArgumentOffset + Register::kMantissaOffset)); __ Lw(input_high, MemOperand(sp, kArgumentOffset + Register::kExponentOffset)); Label normal_exponent; // Extract the biased exponent in result. __ ExtractBits(result_reg, input_high, HeapNumber::kExponentShift, HeapNumber::kExponentBits); // Check for Infinity and NaNs, which should return 0. __ Sub32(scratch, result_reg, HeapNumber::kExponentMask); __ LoadZeroIfConditionZero( result_reg, scratch); // result_reg = scratch == 0 ? 0 : result_reg __ Branch(&done, eq, scratch, Operand(zero_reg)); // Express exponent as delta to (number of mantissa bits + 31). __ Sub32(result_reg, result_reg, Operand(HeapNumber::kExponentBias + HeapNumber::kMantissaBits + 31)); // If the delta is strictly positive, all bits would be shifted away, // which means that we can return 0. __ Branch(&normal_exponent, le, result_reg, Operand(zero_reg), Label::Distance::kNear); __ Move(result_reg, zero_reg); __ Branch(&done); __ bind(&normal_exponent); const int kShiftBase = HeapNumber::kNonMantissaBitsInTopWord - 1; // Calculate shift. __ Add32(scratch, result_reg, Operand(kShiftBase + HeapNumber::kMantissaBits)); // Save the sign. Register sign = result_reg; result_reg = no_reg; __ And(sign, input_high, Operand(HeapNumber::kSignMask)); // We must specially handle shifts greater than 31. Label high_shift_needed, high_shift_done; __ Branch(&high_shift_needed, lt, scratch, Operand(32), Label::Distance::kNear); __ Move(input_high, zero_reg); __ BranchShort(&high_shift_done); __ bind(&high_shift_needed); // Set the implicit 1 before the mantissa part in input_high. __ Or(input_high, input_high, Operand(1 << HeapNumber::kMantissaBitsInTopWord)); // Shift the mantissa bits to the correct position. // We don't need to clear non-mantissa bits as they will be shifted away. // If they weren't, it would mean that the answer is in the 32bit range. __ Sll32(input_high, input_high, scratch); __ bind(&high_shift_done); // Replace the shifted bits with bits from the lower mantissa word. Label pos_shift, shift_done, sign_negative; __ li(kScratchReg, 32); __ subw(scratch, kScratchReg, scratch); __ Branch(&pos_shift, ge, scratch, Operand(zero_reg), Label::Distance::kNear); // Negate scratch. __ Sub32(scratch, zero_reg, scratch); __ Sll32(input_low, input_low, scratch); __ BranchShort(&shift_done); __ bind(&pos_shift); __ srlw(input_low, input_low, scratch); __ bind(&shift_done); __ Or(input_high, input_high, Operand(input_low)); // Restore sign if necessary. __ Move(scratch, sign); result_reg = sign; sign = no_reg; __ Sub32(result_reg, zero_reg, input_high); __ Branch(&sign_negative, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ Move(result_reg, input_high); __ bind(&sign_negative); __ bind(&done); __ Sd(result_reg, MemOperand(sp, kArgumentOffset)); __ Pop(scratch, scratch2, scratch3); __ Pop(result_reg); __ Ret(); } void Builtins::Generate_GenericJSToWasmWrapper(MacroAssembler* masm) { // TODO(v8:10701): Implement for this platform. __ Trap(); } void Builtins::Generate_WasmReturnPromiseOnSuspend(MacroAssembler* masm) { // TODO(v8:12191): Implement for this platform. __ Trap(); } void Builtins::Generate_WasmSuspend(MacroAssembler* masm) { // TODO(v8:12191): Implement for this platform. __ Trap(); } void Builtins::Generate_WasmResume(MacroAssembler* masm) { // TODO(v8:12191): Implement for this platform. __ Trap(); } void Builtins::Generate_WasmOnStackReplace(MacroAssembler* masm) { // Only needed on x64. __ Trap(); } namespace { int AddressOffset(ExternalReference ref0, ExternalReference ref1) { int64_t offset = (ref0.address() - ref1.address()); DCHECK(static_cast(offset) == offset); return static_cast(offset); } // Calls an API function. Allocates HandleScope, extracts returned value // from handle and propagates exceptions. Restores context. stack_space // - space to be unwound on exit (includes the call JS arguments space and // the additional space allocated for the fast call). void CallApiFunctionAndReturn(MacroAssembler* masm, Register function_address, ExternalReference thunk_ref, int stack_space, MemOperand* stack_space_operand, MemOperand return_value_operand) { ASM_CODE_COMMENT(masm); Isolate* isolate = masm->isolate(); ExternalReference next_address = ExternalReference::handle_scope_next_address(isolate); const int kNextOffset = 0; const int kLimitOffset = AddressOffset( ExternalReference::handle_scope_limit_address(isolate), next_address); const int kLevelOffset = AddressOffset( ExternalReference::handle_scope_level_address(isolate), next_address); DCHECK(function_address == a1 || function_address == a2); Label profiler_enabled, end_profiler_check; { UseScratchRegisterScope temp(masm); Register scratch = temp.Acquire(); __ li(scratch, ExternalReference::is_profiling_address(isolate)); __ Lb(scratch, MemOperand(scratch, 0)); __ Branch(&profiler_enabled, ne, scratch, Operand(zero_reg), Label::Distance::kNear); __ li(scratch, ExternalReference::address_of_runtime_stats_flag()); __ Lw(scratch, MemOperand(scratch, 0)); __ Branch(&profiler_enabled, ne, scratch, Operand(zero_reg), Label::Distance::kNear); { // Call the api function directly. __ Move(scratch, function_address); __ BranchShort(&end_profiler_check); } __ bind(&profiler_enabled); { // Additional parameter is the address of the actual callback. __ li(scratch, thunk_ref); } __ bind(&end_profiler_check); // Allocate HandleScope in callee-save registers. __ li(s5, next_address); __ Ld(s3, MemOperand(s5, kNextOffset)); __ Ld(s1, MemOperand(s5, kLimitOffset)); __ Lw(s2, MemOperand(s5, kLevelOffset)); __ Add32(s2, s2, Operand(1)); __ Sw(s2, MemOperand(s5, kLevelOffset)); __ StoreReturnAddressAndCall(scratch); } Label promote_scheduled_exception; Label delete_allocated_handles; Label leave_exit_frame; Label return_value_loaded; // Load value from ReturnValue. __ Ld(a0, return_value_operand); __ bind(&return_value_loaded); // No more valid handles (the result handle was the last one). Restore // previous handle scope. __ Sd(s3, MemOperand(s5, kNextOffset)); if (FLAG_debug_code) { __ Lw(a1, MemOperand(s5, kLevelOffset)); __ Check(eq, AbortReason::kUnexpectedLevelAfterReturnFromApiCall, a1, Operand(s2)); } __ Sub32(s2, s2, Operand(1)); __ Sw(s2, MemOperand(s5, kLevelOffset)); __ Ld(kScratchReg, MemOperand(s5, kLimitOffset)); __ Branch(&delete_allocated_handles, ne, s1, Operand(kScratchReg)); // Leave the API exit frame. __ bind(&leave_exit_frame); if (stack_space_operand == nullptr) { DCHECK_NE(stack_space, 0); __ li(s3, Operand(stack_space)); } else { DCHECK_EQ(stack_space, 0); STATIC_ASSERT(kCArgSlotCount == 0); __ Ld(s3, *stack_space_operand); } static constexpr bool kDontSaveDoubles = false; static constexpr bool kRegisterContainsSlotCount = false; __ LeaveExitFrame(kDontSaveDoubles, s3, NO_EMIT_RETURN, kRegisterContainsSlotCount); // Check if the function scheduled an exception. __ LoadRoot(a4, RootIndex::kTheHoleValue); __ li(kScratchReg, ExternalReference::scheduled_exception_address(isolate)); __ Ld(a5, MemOperand(kScratchReg)); __ Branch(&promote_scheduled_exception, ne, a4, Operand(a5), Label::Distance::kNear); __ Ret(); // Re-throw by promoting a scheduled exception. __ bind(&promote_scheduled_exception); __ TailCallRuntime(Runtime::kPromoteScheduledException); // HandleScope limit has changed. Delete allocated extensions. __ bind(&delete_allocated_handles); __ Sd(s1, MemOperand(s5, kLimitOffset)); __ Move(s3, a0); __ PrepareCallCFunction(1, s1); __ li(a0, ExternalReference::isolate_address(isolate)); __ CallCFunction(ExternalReference::delete_handle_scope_extensions(), 1); __ Move(a0, s3); __ Branch(&leave_exit_frame); } } // namespace void Builtins::Generate_CallApiCallback(MacroAssembler* masm) { // ----------- S t a t e ------------- // -- cp : context // -- a1 : api function address // -- a2 : arguments count // -- a3 : call data // -- a0 : holder // -- // -- sp[0] : receiver // -- sp[8] : first argument // -- ... // -- sp[(argc) * 8] : last argument // ----------------------------------- UseScratchRegisterScope temps(masm); temps.Include(t0, t1); Register api_function_address = a1; Register argc = a2; Register call_data = a3; Register holder = a0; Register scratch = temps.Acquire(); Register base = temps.Acquire(); // For addressing MemOperands on the stack. DCHECK(!AreAliased(api_function_address, argc, call_data, holder, scratch, base)); using FCA = FunctionCallbackArguments; STATIC_ASSERT(FCA::kArgsLength == 6); STATIC_ASSERT(FCA::kNewTargetIndex == 5); STATIC_ASSERT(FCA::kDataIndex == 4); STATIC_ASSERT(FCA::kReturnValueOffset == 3); STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); STATIC_ASSERT(FCA::kIsolateIndex == 1); STATIC_ASSERT(FCA::kHolderIndex == 0); // Set up FunctionCallbackInfo's implicit_args on the stack as follows: // // Target state: // sp[0 * kSystemPointerSize]: kHolder // sp[1 * kSystemPointerSize]: kIsolate // sp[2 * kSystemPointerSize]: undefined (kReturnValueDefaultValue) // sp[3 * kSystemPointerSize]: undefined (kReturnValue) // sp[4 * kSystemPointerSize]: kData // sp[5 * kSystemPointerSize]: undefined (kNewTarget) // Set up the base register for addressing through MemOperands. It will point // at the receiver (located at sp + argc * kSystemPointerSize). __ CalcScaledAddress(base, sp, argc, kSystemPointerSizeLog2); // Reserve space on the stack. __ Sub64(sp, sp, Operand(FCA::kArgsLength * kSystemPointerSize)); // kHolder. __ Sd(holder, MemOperand(sp, 0 * kSystemPointerSize)); // kIsolate. __ li(scratch, ExternalReference::isolate_address(masm->isolate())); __ Sd(scratch, MemOperand(sp, 1 * kSystemPointerSize)); // kReturnValueDefaultValue and kReturnValue. __ LoadRoot(scratch, RootIndex::kUndefinedValue); __ Sd(scratch, MemOperand(sp, 2 * kSystemPointerSize)); __ Sd(scratch, MemOperand(sp, 3 * kSystemPointerSize)); // kData. __ Sd(call_data, MemOperand(sp, 4 * kSystemPointerSize)); // kNewTarget. __ Sd(scratch, MemOperand(sp, 5 * kSystemPointerSize)); // Keep a pointer to kHolder (= implicit_args) in a scratch register. // We use it below to set up the FunctionCallbackInfo object. __ Move(scratch, sp); // Allocate the v8::Arguments structure in the arguments' space since // it's not controlled by GC. static constexpr int kApiStackSpace = 4; static constexpr bool kDontSaveDoubles = false; FrameScope frame_scope(masm, StackFrame::MANUAL); __ EnterExitFrame(kDontSaveDoubles, kApiStackSpace); // EnterExitFrame may align the sp. // FunctionCallbackInfo::implicit_args_ (points at kHolder as set up above). // Arguments are after the return address (pushed by EnterExitFrame()). __ Sd(scratch, MemOperand(sp, 1 * kSystemPointerSize)); // FunctionCallbackInfo::values_ (points at the first varargs argument passed // on the stack). __ Add64(scratch, scratch, Operand((FCA::kArgsLength + 1) * kSystemPointerSize)); __ Sd(scratch, MemOperand(sp, 2 * kSystemPointerSize)); // FunctionCallbackInfo::length_. // Stored as int field, 32-bit integers within struct on stack always left // justified by n64 ABI. __ Sw(argc, MemOperand(sp, 3 * kSystemPointerSize)); // We also store the number of bytes to drop from the stack after returning // from the API function here. // Note: Unlike on other architectures, this stores the number of slots to // drop, not the number of bytes. __ Add64(scratch, argc, Operand(FCA::kArgsLength + 1 /* receiver */)); __ Sd(scratch, MemOperand(sp, 4 * kSystemPointerSize)); // v8::InvocationCallback's argument. DCHECK(!AreAliased(api_function_address, scratch, a0)); __ Add64(a0, sp, Operand(1 * kSystemPointerSize)); ExternalReference thunk_ref = ExternalReference::invoke_function_callback(); // There are two stack slots above the arguments we constructed on the stack. // TODO(jgruber): Document what these arguments are. static constexpr int kStackSlotsAboveFCA = 2; MemOperand return_value_operand( fp, (kStackSlotsAboveFCA + FCA::kReturnValueOffset) * kSystemPointerSize); static constexpr int kUseStackSpaceOperand = 0; MemOperand stack_space_operand(sp, 4 * kSystemPointerSize); AllowExternalCallThatCantCauseGC scope(masm); CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, kUseStackSpaceOperand, &stack_space_operand, return_value_operand); } void Builtins::Generate_CallApiGetter(MacroAssembler* masm) { // Build v8::PropertyCallbackInfo::args_ array on the stack and push property // name below the exit frame to make GC aware of them. STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0); STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1); STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2); STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3); STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4); STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5); STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6); STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7); Register receiver = ApiGetterDescriptor::ReceiverRegister(); Register holder = ApiGetterDescriptor::HolderRegister(); Register callback = ApiGetterDescriptor::CallbackRegister(); Register scratch = a4; DCHECK(!AreAliased(receiver, holder, callback, scratch)); Register api_function_address = a2; // Here and below +1 is for name() pushed after the args_ array. using PCA = PropertyCallbackArguments; __ Sub64(sp, sp, (PCA::kArgsLength + 1) * kSystemPointerSize); __ Sd(receiver, MemOperand(sp, (PCA::kThisIndex + 1) * kSystemPointerSize)); __ LoadAnyTaggedField(scratch, FieldMemOperand(callback, AccessorInfo::kDataOffset)); __ Sd(scratch, MemOperand(sp, (PCA::kDataIndex + 1) * kSystemPointerSize)); __ LoadRoot(scratch, RootIndex::kUndefinedValue); __ Sd(scratch, MemOperand(sp, (PCA::kReturnValueOffset + 1) * kSystemPointerSize)); __ Sd(scratch, MemOperand(sp, (PCA::kReturnValueDefaultValueIndex + 1) * kSystemPointerSize)); __ li(scratch, ExternalReference::isolate_address(masm->isolate())); __ Sd(scratch, MemOperand(sp, (PCA::kIsolateIndex + 1) * kSystemPointerSize)); __ Sd(holder, MemOperand(sp, (PCA::kHolderIndex + 1) * kSystemPointerSize)); // should_throw_on_error -> false DCHECK_EQ(0, Smi::zero().ptr()); __ Sd(zero_reg, MemOperand(sp, (PCA::kShouldThrowOnErrorIndex + 1) * kSystemPointerSize)); __ LoadTaggedPointerField( scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset)); __ Sd(scratch, MemOperand(sp, 0 * kSystemPointerSize)); // v8::PropertyCallbackInfo::args_ array and name handle. const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; // Load address of v8::PropertyAccessorInfo::args_ array and name handle. __ Move(a0, sp); // a0 = Handle __ Add64(a1, a0, Operand(1 * kSystemPointerSize)); // a1 = v8::PCI::args_ const int kApiStackSpace = 1; FrameScope frame_scope(masm, StackFrame::MANUAL); __ EnterExitFrame(false, kApiStackSpace); // Create v8::PropertyCallbackInfo object on the stack and initialize // it's args_ field. __ Sd(a1, MemOperand(sp, 1 * kSystemPointerSize)); __ Add64(a1, sp, Operand(1 * kSystemPointerSize)); // a1 = v8::PropertyCallbackInfo& ExternalReference thunk_ref = ExternalReference::invoke_accessor_getter_callback(); __ LoadTaggedPointerField( scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset)); __ Ld(api_function_address, FieldMemOperand(scratch, Foreign::kForeignAddressOffset)); // +3 is to skip prolog, return address and name handle. MemOperand return_value_operand( fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kSystemPointerSize); MemOperand* const kUseStackSpaceConstant = nullptr; CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, kStackUnwindSpace, kUseStackSpaceConstant, return_value_operand); } void Builtins::Generate_DirectCEntry(MacroAssembler* masm) { // The sole purpose of DirectCEntry is for movable callers (e.g. any general // purpose Code object) to be able to call into C functions that may trigger // GC and thus move the caller. // // DirectCEntry places the return address on the stack (updated by the GC), // making the call GC safe. The irregexp backend relies on this. // Make place for arguments to fit C calling convention. Callers use // EnterExitFrame/LeaveExitFrame so they handle stack restoring and we don't // have to do that here. Any caller must drop kCArgsSlotsSize stack space // after the call. __ Add64(sp, sp, -kCArgsSlotsSize); __ Sd(ra, MemOperand(sp, kCArgsSlotsSize)); // Store the return address. __ Call(t6); // Call the C++ function. __ Ld(t6, MemOperand(sp, kCArgsSlotsSize)); // Return to calling code. if (FLAG_debug_code && FLAG_enable_slow_asserts) { // In case of an error the return address may point to a memory area // filled with kZapValue by the GC. Dereference the address and check for // this. __ Uld(a4, MemOperand(t6)); __ Assert(ne, AbortReason::kReceivedInvalidReturnAddress, a4, Operand(reinterpret_cast(kZapValue))); } __ Jump(t6); } namespace { // This code tries to be close to ia32 code so that any changes can be // easily ported. void Generate_DeoptimizationEntry(MacroAssembler* masm, DeoptimizeKind deopt_kind) { Isolate* isolate = masm->isolate(); // Unlike on ARM we don't save all the registers, just the useful ones. // For the rest, there are gaps on the stack, so the offsets remain the same. const int kNumberOfRegisters = Register::kNumRegisters; RegList restored_regs = kJSCallerSaved | kCalleeSaved; RegList saved_regs = restored_regs | sp | ra; const int kDoubleRegsSize = kDoubleSize * DoubleRegister::kNumRegisters; // Save all double FPU registers before messing with them. __ Sub64(sp, sp, Operand(kDoubleRegsSize)); const RegisterConfiguration* config = RegisterConfiguration::Default(); for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { int code = config->GetAllocatableDoubleCode(i); const DoubleRegister fpu_reg = DoubleRegister::from_code(code); int offset = code * kDoubleSize; __ StoreDouble(fpu_reg, MemOperand(sp, offset)); } // Push saved_regs (needed to populate FrameDescription::registers_). // Leave gaps for other registers. __ Sub64(sp, sp, kNumberOfRegisters * kSystemPointerSize); for (int16_t i = kNumberOfRegisters - 1; i >= 0; i--) { if ((saved_regs.bits() & (1 << i)) != 0) { __ Sd(ToRegister(i), MemOperand(sp, kSystemPointerSize * i)); } } __ li(a2, ExternalReference::Create(IsolateAddressId::kCEntryFPAddress, isolate)); __ Sd(fp, MemOperand(a2)); const int kSavedRegistersAreaSize = (kNumberOfRegisters * kSystemPointerSize) + kDoubleRegsSize; // Get the address of the location in the code object (a3) (return // address for lazy deoptimization) and compute the fp-to-sp delta in // register a4. __ Move(a2, ra); __ Add64(a3, sp, Operand(kSavedRegistersAreaSize)); __ Sub64(a3, fp, a3); // Allocate a new deoptimizer object. __ PrepareCallCFunction(5, a4); // Pass five arguments, according to n64 ABI. __ Move(a0, zero_reg); Label context_check; __ Ld(a1, MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); __ JumpIfSmi(a1, &context_check); __ Ld(a0, MemOperand(fp, StandardFrameConstants::kFunctionOffset)); __ bind(&context_check); __ li(a1, Operand(static_cast(deopt_kind))); // a2: code object address // a3: fp-to-sp delta __ li(a4, ExternalReference::isolate_address(isolate)); // Call Deoptimizer::New(). { AllowExternalCallThatCantCauseGC scope(masm); __ CallCFunction(ExternalReference::new_deoptimizer_function(), 5); } // Preserve "deoptimizer" object in register a0 and get the input // frame descriptor pointer to a1 (deoptimizer->input_); __ Ld(a1, MemOperand(a0, Deoptimizer::input_offset())); // Copy core registers into FrameDescription::registers_[kNumRegisters]. DCHECK_EQ(Register::kNumRegisters, kNumberOfRegisters); for (int i = 0; i < kNumberOfRegisters; i++) { int offset = (i * kSystemPointerSize) + FrameDescription::registers_offset(); if ((saved_regs.bits() & (1 << i)) != 0) { __ Ld(a2, MemOperand(sp, i * kSystemPointerSize)); __ Sd(a2, MemOperand(a1, offset)); } else if (FLAG_debug_code) { __ li(a2, kDebugZapValue); __ Sd(a2, MemOperand(a1, offset)); } } int double_regs_offset = FrameDescription::double_registers_offset(); // Copy FPU registers to // double_registers_[DoubleRegister::kNumAllocatableRegisters] for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { int code = config->GetAllocatableDoubleCode(i); int dst_offset = code * kDoubleSize + double_regs_offset; int src_offset = code * kDoubleSize + kNumberOfRegisters * kSystemPointerSize; __ LoadDouble(ft0, MemOperand(sp, src_offset)); __ StoreDouble(ft0, MemOperand(a1, dst_offset)); } // Remove the saved registers from the stack. __ Add64(sp, sp, Operand(kSavedRegistersAreaSize)); // Compute a pointer to the unwinding limit in register a2; that is // the first stack slot not part of the input frame. __ Ld(a2, MemOperand(a1, FrameDescription::frame_size_offset())); __ Add64(a2, a2, sp); // Unwind the stack down to - but not including - the unwinding // limit and copy the contents of the activation frame to the input // frame description. __ Add64(a3, a1, Operand(FrameDescription::frame_content_offset())); Label pop_loop; Label pop_loop_header; __ BranchShort(&pop_loop_header); __ bind(&pop_loop); __ pop(a4); __ Sd(a4, MemOperand(a3, 0)); __ Add64(a3, a3, sizeof(uint64_t)); __ bind(&pop_loop_header); __ Branch(&pop_loop, ne, a2, Operand(sp), Label::Distance::kNear); // Compute the output frame in the deoptimizer. __ push(a0); // Preserve deoptimizer object across call. // a0: deoptimizer object; a1: scratch. __ PrepareCallCFunction(1, a1); // Call Deoptimizer::ComputeOutputFrames(). { AllowExternalCallThatCantCauseGC scope(masm); __ CallCFunction(ExternalReference::compute_output_frames_function(), 1); } __ pop(a0); // Restore deoptimizer object (class Deoptimizer). __ Ld(sp, MemOperand(a0, Deoptimizer::caller_frame_top_offset())); // Replace the current (input) frame with the output frames. Label outer_push_loop, inner_push_loop, outer_loop_header, inner_loop_header; // Outer loop state: a4 = current "FrameDescription** output_", // a1 = one past the last FrameDescription**. __ Lw(a1, MemOperand(a0, Deoptimizer::output_count_offset())); __ Ld(a4, MemOperand(a0, Deoptimizer::output_offset())); // a4 is output_. __ CalcScaledAddress(a1, a4, a1, kSystemPointerSizeLog2); __ BranchShort(&outer_loop_header); __ bind(&outer_push_loop); // Inner loop state: a2 = current FrameDescription*, a3 = loop index. __ Ld(a2, MemOperand(a4, 0)); // output_[ix] __ Ld(a3, MemOperand(a2, FrameDescription::frame_size_offset())); __ BranchShort(&inner_loop_header); __ bind(&inner_push_loop); __ Sub64(a3, a3, Operand(sizeof(uint64_t))); __ Add64(a6, a2, Operand(a3)); __ Ld(a7, MemOperand(a6, FrameDescription::frame_content_offset())); __ push(a7); __ bind(&inner_loop_header); __ Branch(&inner_push_loop, ne, a3, Operand(zero_reg)); __ Add64(a4, a4, Operand(kSystemPointerSize)); __ bind(&outer_loop_header); __ Branch(&outer_push_loop, lt, a4, Operand(a1)); __ Ld(a1, MemOperand(a0, Deoptimizer::input_offset())); for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { int code = config->GetAllocatableDoubleCode(i); const DoubleRegister fpu_reg = DoubleRegister::from_code(code); int src_offset = code * kDoubleSize + double_regs_offset; __ LoadDouble(fpu_reg, MemOperand(a1, src_offset)); } // Push pc and continuation from the last output frame. __ Ld(a6, MemOperand(a2, FrameDescription::pc_offset())); __ push(a6); __ Ld(a6, MemOperand(a2, FrameDescription::continuation_offset())); __ push(a6); // Technically restoring 't3' should work unless zero_reg is also restored // but it's safer to check for this. DCHECK(!(restored_regs.has(t3))); // Restore the registers from the last output frame. __ Move(t3, a2); for (int i = kNumberOfRegisters - 1; i >= 0; i--) { int offset = (i * kSystemPointerSize) + FrameDescription::registers_offset(); if ((restored_regs.bits() & (1 << i)) != 0) { __ Ld(ToRegister(i), MemOperand(t3, offset)); } } __ pop(t6); // Get continuation, leave pc on stack. __ pop(ra); __ Jump(t6); __ stop(); } } // namespace void Builtins::Generate_DeoptimizationEntry_Eager(MacroAssembler* masm) { Generate_DeoptimizationEntry(masm, DeoptimizeKind::kEager); } void Builtins::Generate_DeoptimizationEntry_Lazy(MacroAssembler* masm) { Generate_DeoptimizationEntry(masm, DeoptimizeKind::kLazy); } void Builtins::Generate_DeoptimizationEntry_Unused(MacroAssembler* masm) { Generate_DeoptimizationEntry(masm, DeoptimizeKind::kUnused); } namespace { // Restarts execution either at the current or next (in execution order) // bytecode. If there is baseline code on the shared function info, converts an // interpreter frame into a baseline frame and continues execution in baseline // code. Otherwise execution continues with bytecode. void Generate_BaselineOrInterpreterEntry(MacroAssembler* masm, bool next_bytecode, bool is_osr = false) { Label start; __ bind(&start); // Get function from the frame. Register closure = a1; __ Ld(closure, MemOperand(fp, StandardFrameConstants::kFunctionOffset)); // Get the Code object from the shared function info. Register code_obj = s1; __ LoadTaggedPointerField( code_obj, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); __ LoadTaggedPointerField( code_obj, FieldMemOperand(code_obj, SharedFunctionInfo::kFunctionDataOffset)); // Check if we have baseline code. For OSR entry it is safe to assume we // always have baseline code. if (!is_osr) { Label start_with_baseline; UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ GetObjectType(code_obj, scratch, scratch); __ Branch(&start_with_baseline, eq, scratch, Operand(CODET_TYPE)); // Start with bytecode as there is no baseline code. Builtin builtin_id = next_bytecode ? Builtin::kInterpreterEnterAtNextBytecode : Builtin::kInterpreterEnterAtBytecode; __ Jump(masm->isolate()->builtins()->code_handle(builtin_id), RelocInfo::CODE_TARGET); // Start with baseline code. __ bind(&start_with_baseline); } else if (FLAG_debug_code) { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); __ GetObjectType(code_obj, scratch, scratch); __ Assert(eq, AbortReason::kExpectedBaselineData, scratch, Operand(CODET_TYPE)); } if (FLAG_debug_code) { UseScratchRegisterScope temps(masm); Register scratch = temps.Acquire(); AssertCodeIsBaseline(masm, code_obj, scratch); } // Replace BytecodeOffset with the feedback vector. Register feedback_vector = a2; __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(closure, JSFunction::kFeedbackCellOffset)); __ LoadTaggedPointerField( feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); Label install_baseline_code; // Check if feedback vector is valid. If not, call prepare for baseline to // allocate it. UseScratchRegisterScope temps(masm); Register type = temps.Acquire(); __ GetObjectType(feedback_vector, type, type); __ Branch(&install_baseline_code, ne, type, Operand(FEEDBACK_VECTOR_TYPE)); // Save BytecodeOffset from the stack frame. __ SmiUntag(kInterpreterBytecodeOffsetRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); // Replace BytecodeOffset with the feedback vector. __ Sd(feedback_vector, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); feedback_vector = no_reg; // Compute baseline pc for bytecode offset. ExternalReference get_baseline_pc_extref; if (next_bytecode || is_osr) { get_baseline_pc_extref = ExternalReference::baseline_pc_for_next_executed_bytecode(); } else { get_baseline_pc_extref = ExternalReference::baseline_pc_for_bytecode_offset(); } Register get_baseline_pc = a3; __ li(get_baseline_pc, get_baseline_pc_extref); // If the code deoptimizes during the implicit function entry stack interrupt // check, it will have a bailout ID of kFunctionEntryBytecodeOffset, which is // not a valid bytecode offset. // TODO(pthier): Investigate if it is feasible to handle this special case // in TurboFan instead of here. Label valid_bytecode_offset, function_entry_bytecode; if (!is_osr) { __ Branch(&function_entry_bytecode, eq, kInterpreterBytecodeOffsetRegister, Operand(BytecodeArray::kHeaderSize - kHeapObjectTag + kFunctionEntryBytecodeOffset)); } __ Sub64(kInterpreterBytecodeOffsetRegister, kInterpreterBytecodeOffsetRegister, (BytecodeArray::kHeaderSize - kHeapObjectTag)); __ bind(&valid_bytecode_offset); // Get bytecode array from the stack frame. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); __ Push(kInterpreterAccumulatorRegister); { Register arg_reg_1 = a0; Register arg_reg_2 = a1; Register arg_reg_3 = a2; __ Move(arg_reg_1, code_obj); __ Move(arg_reg_2, kInterpreterBytecodeOffsetRegister); __ Move(arg_reg_3, kInterpreterBytecodeArrayRegister); FrameScope scope(masm, StackFrame::INTERNAL); __ CallCFunction(get_baseline_pc, 3, 0); } __ Add64(code_obj, code_obj, kReturnRegister0); __ Pop(kInterpreterAccumulatorRegister); if (is_osr) { // TODO(pthier): Separate baseline Sparkplug from TF arming and don't disarm // Sparkplug here. __ Ld(kInterpreterBytecodeArrayRegister, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister); Generate_OSREntry(masm, code_obj, Operand(Code::kHeaderSize - kHeapObjectTag)); } else { __ Add64(code_obj, code_obj, Code::kHeaderSize - kHeapObjectTag); __ Jump(code_obj); } __ Trap(); // Unreachable. if (!is_osr) { __ bind(&function_entry_bytecode); // If the bytecode offset is kFunctionEntryOffset, get the start address of // the first bytecode. __ li(kInterpreterBytecodeOffsetRegister, Operand(int64_t(0))); if (next_bytecode) { __ li(get_baseline_pc, ExternalReference::baseline_pc_for_bytecode_offset()); } __ Branch(&valid_bytecode_offset); } __ bind(&install_baseline_code); { FrameScope scope(masm, StackFrame::INTERNAL); __ Push(kInterpreterAccumulatorRegister); __ Push(closure); __ CallRuntime(Runtime::kInstallBaselineCode, 1); __ Pop(kInterpreterAccumulatorRegister); } // Retry from the start after installing baseline code. __ Branch(&start); } } // namespace void Builtins::Generate_BaselineOrInterpreterEnterAtBytecode( MacroAssembler* masm) { Generate_BaselineOrInterpreterEntry(masm, false); } void Builtins::Generate_BaselineOrInterpreterEnterAtNextBytecode( MacroAssembler* masm) { Generate_BaselineOrInterpreterEntry(masm, true); } void Builtins::Generate_InterpreterOnStackReplacement_ToBaseline( MacroAssembler* masm) { Generate_BaselineOrInterpreterEntry(masm, false, true); } #undef __ } // namespace internal } // namespace v8 #endif // V8_TARGET_ARCH_RISCV64