| // Copyright 2013 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_ARM64 |
| |
| #include "src/arm64/frames-arm64.h" |
| #include "src/arm64/macro-assembler-arm64-inl.h" |
| #include "src/codegen.h" |
| #include "src/counters.h" |
| #include "src/debug/debug.h" |
| #include "src/deoptimizer.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/objects-inl.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| // Load the built-in Array function from the current context. |
| static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| // Load the InternalArray function from the native context. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| // Load the built-in InternalArray function from the current context. |
| static void GenerateLoadInternalArrayFunction(MacroAssembler* masm, |
| Register result) { |
| // Load the InternalArray function from the native context. |
| __ LoadNativeContextSlot(Context::INTERNAL_ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, Address address, |
| ExitFrameType exit_frame_type) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments excluding receiver |
| // -- x1 : target |
| // -- x3 : new target |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[4 * (argc - 1)] : first argument |
| // -- sp[4 * argc] : receiver |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // Make sure we operate in the context of the called function (for example |
| // ConstructStubs implemented in C++ will be run in the context of the caller |
| // instead of the callee, due to the way that [[Construct]] is defined for |
| // ordinary functions). |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // JumpToExternalReference expects x0 to contain the number of arguments |
| // including the receiver and the extra arguments. |
| const int num_extra_args = 3; |
| __ Add(x0, x0, num_extra_args + 1); |
| |
| // Insert extra arguments. |
| __ SmiTag(x0); |
| __ Push(x0, x1, x3); |
| __ SmiUntag(x0); |
| |
| __ JumpToExternalReference(ExternalReference(address, masm->isolate()), |
| exit_frame_type == BUILTIN_EXIT); |
| } |
| |
| void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_InternalArrayCode"); |
| Label generic_array_code; |
| |
| // Get the InternalArray function. |
| GenerateLoadInternalArrayFunction(masm, x1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin InternalArray functions should be maps. |
| __ Ldr(x10, FieldMemOperand(x1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ Tst(x10, kSmiTagMask); |
| __ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction); |
| __ CompareObjectType(x10, x11, x12, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction); |
| } |
| |
| // Run the native code for the InternalArray function called as a normal |
| // function. |
| InternalArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ArrayCode"); |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the Array function. |
| GenerateLoadArrayFunction(masm, x1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array functions should be maps. |
| __ Ldr(x10, FieldMemOperand(x1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ Tst(x10, kSmiTagMask); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| __ CompareObjectType(x10, x11, x12, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| // Run the native code for the Array function called as a normal function. |
| __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| __ Mov(x3, x1); |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_NumberConstructor"); |
| |
| // 1. Load the first argument into x0. |
| Label no_arguments; |
| { |
| __ Cbz(x0, &no_arguments); |
| __ Mov(x2, x0); // Store argc in x2. |
| __ Sub(x0, x0, 1); |
| __ Ldr(x0, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. Convert first argument to number. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x2); |
| __ EnterBuiltinFrame(cp, x1, x2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ LeaveBuiltinFrame(cp, x1, x2); |
| __ SmiUntag(x2); |
| } |
| |
| { |
| // Drop all arguments. |
| __ Drop(x2); |
| } |
| |
| // 2b. No arguments, return +0 (already in x0). |
| __ Bind(&no_arguments); |
| __ Drop(1); |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_NumberConstructor_ConstructStub"); |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into x2. |
| { |
| Label no_arguments, done; |
| __ Move(x6, x0); // Store argc in x6. |
| __ Cbz(x0, &no_arguments); |
| __ Sub(x0, x0, 1); |
| __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| __ B(&done); |
| __ Bind(&no_arguments); |
| __ Mov(x2, Smi::kZero); |
| __ Bind(&done); |
| } |
| |
| // 3. Make sure x2 is a number. |
| { |
| Label done_convert; |
| __ JumpIfSmi(x2, &done_convert); |
| __ JumpIfObjectType(x2, x4, x4, HEAP_NUMBER_TYPE, &done_convert, eq); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x3); |
| __ Move(x0, x2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ Move(x2, x0); |
| __ Pop(x3); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ Cmp(x1, x3); |
| __ B(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the number. |
| __ AllocateJSValue(x0, x1, x2, x4, x5, &new_object); |
| __ B(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x2); // first argument |
| __ Call(masm->isolate()->builtins()->FastNewObject(), |
| RelocInfo::CODE_TARGET); |
| __ Pop(x2); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Str(x2, FieldMemOperand(x0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x6); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_StringConstructor"); |
| |
| // 1. Load the first argument into x0. |
| Label no_arguments; |
| { |
| __ Cbz(x0, &no_arguments); |
| __ Mov(x2, x0); // Store argc in x2. |
| __ Sub(x0, x0, 1); |
| __ Ldr(x0, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. At least one argument, return x0 if it's a string, otherwise |
| // dispatch to appropriate conversion. |
| Label drop_frame_and_ret, to_string, symbol_descriptive_string; |
| { |
| __ JumpIfSmi(x0, &to_string); |
| STATIC_ASSERT(FIRST_NONSTRING_TYPE == SYMBOL_TYPE); |
| __ CompareObjectType(x0, x3, x3, FIRST_NONSTRING_TYPE); |
| __ B(hi, &to_string); |
| __ B(eq, &symbol_descriptive_string); |
| __ b(&drop_frame_and_ret); |
| } |
| |
| // 2b. No arguments, return the empty string (and pop the receiver). |
| __ Bind(&no_arguments); |
| { |
| __ LoadRoot(x0, Heap::kempty_stringRootIndex); |
| __ Drop(1); |
| __ Ret(); |
| } |
| |
| // 3a. Convert x0 to a string. |
| __ Bind(&to_string); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x2); |
| __ EnterBuiltinFrame(cp, x1, x2); |
| __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET); |
| __ LeaveBuiltinFrame(cp, x1, x2); |
| __ SmiUntag(x2); |
| } |
| __ b(&drop_frame_and_ret); |
| |
| // 3b. Convert symbol in x0 to a string. |
| __ Bind(&symbol_descriptive_string); |
| { |
| __ Drop(x2); |
| __ Drop(1); |
| __ Push(x0); |
| __ TailCallRuntime(Runtime::kSymbolDescriptiveString); |
| } |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x2); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_StringConstructor_ConstructStub"); |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into x2. |
| { |
| Label no_arguments, done; |
| __ mov(x6, x0); // Store argc in x6. |
| __ Cbz(x0, &no_arguments); |
| __ Sub(x0, x0, 1); |
| __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| __ B(&done); |
| __ Bind(&no_arguments); |
| __ LoadRoot(x2, Heap::kempty_stringRootIndex); |
| __ Bind(&done); |
| } |
| |
| // 3. Make sure x2 is a string. |
| { |
| Label convert, done_convert; |
| __ JumpIfSmi(x2, &convert); |
| __ JumpIfObjectType(x2, x4, x4, FIRST_NONSTRING_TYPE, &done_convert, lo); |
| __ Bind(&convert); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x3); |
| __ Move(x0, x2); |
| __ Call(masm->isolate()->builtins()->ToString(), RelocInfo::CODE_TARGET); |
| __ Move(x2, x0); |
| __ Pop(x3); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ Cmp(x1, x3); |
| __ B(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the string. |
| __ AllocateJSValue(x0, x1, x2, x4, x5, &new_object); |
| __ B(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x2); // first argument |
| __ Call(masm->isolate()->builtins()->FastNewObject(), |
| RelocInfo::CODE_TARGET); |
| __ Pop(x2); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Str(x2, FieldMemOperand(x0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x6); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x2, FieldMemOperand(x2, SharedFunctionInfo::kCodeOffset)); |
| __ Add(x2, x2, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x2); |
| } |
| |
| static void GenerateTailCallToReturnedCode(MacroAssembler* masm, |
| Runtime::FunctionId function_id) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x1 : target function (preserved for callee) |
| // -- x3 : new target (preserved for callee) |
| // ----------------------------------- |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the target function and the new target. |
| // Push another copy as a parameter to the runtime call. |
| __ SmiTag(x0); |
| __ Push(x0, x1, x3, x1); |
| |
| __ CallRuntime(function_id, 1); |
| __ Move(x2, x0); |
| |
| // Restore target function and new target. |
| __ Pop(x3, x1, x0); |
| __ SmiUntag(x0); |
| } |
| |
| __ Add(x2, x2, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x2); |
| } |
| |
| namespace { |
| |
| void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) { |
| Label post_instantiation_deopt_entry; |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| ASM_LOCATION("Builtins::Generate_JSConstructStubHelper"); |
| |
| // Enter a construct frame. |
| { |
| FrameScope scope(masm, StackFrame::CONSTRUCT); |
| |
| // Preserve the incoming parameters on the stack. |
| __ SmiTag(x0); |
| __ Push(cp, x0); |
| __ SmiUntag(x0); |
| |
| __ PushRoot(Heap::kTheHoleValueRootIndex); |
| |
| // Set up pointer to last argument. |
| __ Add(x2, fp, StandardFrameConstants::kCallerSPOffset); |
| |
| // Copy arguments and receiver to the expression stack. |
| // Copy 2 values every loop to use ldp/stp. |
| |
| // Compute pointer behind the first argument. |
| __ Add(x4, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| Label loop, entry, done_copying_arguments; |
| // ----------- S t a t e ------------- |
| // -- x0: number of arguments (untagged) |
| // -- x1: constructor function |
| // -- x3: new target |
| // -- x2: pointer to last argument (caller sp) |
| // -- x4: pointer to argument last copied |
| // -- sp[0*kPointerSize]: the hole (receiver) |
| // -- sp[1*kPointerSize]: number of arguments (tagged) |
| // -- sp[2*kPointerSize]: context |
| // ----------------------------------- |
| __ B(&entry); |
| __ Bind(&loop); |
| __ Ldp(x10, x11, MemOperand(x4, -2 * kPointerSize, PreIndex)); |
| __ Push(x11, x10); |
| __ Bind(&entry); |
| __ Cmp(x4, x2); |
| __ B(gt, &loop); |
| // Because we copied values 2 by 2 we may have copied one extra value. |
| // Drop it if that is the case. |
| __ B(eq, &done_copying_arguments); |
| __ Drop(1); |
| __ Bind(&done_copying_arguments); |
| |
| // Call the function. |
| // x0: number of arguments |
| // x1: constructor function |
| // x3: new target |
| ParameterCount actual(x0); |
| __ InvokeFunction(x1, x3, actual, CALL_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // Restore the context from the frame. |
| __ Ldr(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); |
| // Restore smi-tagged arguments count from the frame. |
| __ Peek(x1, 0); |
| // Leave construct frame. |
| } |
| |
| // Remove caller arguments from the stack and return. |
| __ DropBySMI(x1); |
| __ Drop(1); |
| __ Ret(); |
| } |
| |
| // The construct stub for ES5 constructor functions and ES6 class constructors. |
| void Generate_JSConstructStubGeneric(MacroAssembler* masm, |
| bool restrict_constructor_return) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- lr : return address |
| // -- cp : context pointer |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| ASM_LOCATION("Builtins::Generate_JSConstructStubHelper"); |
| |
| // Enter a construct frame. |
| { |
| FrameScope scope(masm, StackFrame::CONSTRUCT); |
| Label post_instantiation_deopt_entry, not_create_implicit_receiver; |
| |
| // Preserve the incoming parameters on the stack. |
| __ SmiTag(x0); |
| __ Push(cp, x0, x1, x3); |
| |
| // ----------- S t a t e ------------- |
| // -- sp[0*kPointerSize]: new target |
| // -- x1 and sp[1*kPointerSize]: constructor function |
| // -- sp[2*kPointerSize]: number of arguments (tagged) |
| // -- sp[3*kPointerSize]: context |
| // ----------------------------------- |
| |
| __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w4, FieldMemOperand(x4, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ tst(w4, Operand(SharedFunctionInfo::kDerivedConstructorMask)); |
| __ B(ne, ¬_create_implicit_receiver); |
| |
| // If not derived class constructor: Allocate the new receiver object. |
| __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1, |
| x4, x5); |
| __ Call(masm->isolate()->builtins()->FastNewObject(), |
| RelocInfo::CODE_TARGET); |
| __ B(&post_instantiation_deopt_entry); |
| |
| // Else: use TheHoleValue as receiver for constructor call |
| __ bind(¬_create_implicit_receiver); |
| __ LoadRoot(x0, Heap::kTheHoleValueRootIndex); |
| |
| // ----------- S t a t e ------------- |
| // -- x0: receiver |
| // -- Slot 3 / sp[0*kPointerSize]: new target |
| // -- Slot 2 / sp[1*kPointerSize]: constructor function |
| // -- Slot 1 / sp[2*kPointerSize]: number of arguments (tagged) |
| // -- Slot 0 / sp[3*kPointerSize]: context |
| // ----------------------------------- |
| // Deoptimizer enters here. |
| masm->isolate()->heap()->SetConstructStubCreateDeoptPCOffset( |
| masm->pc_offset()); |
| __ bind(&post_instantiation_deopt_entry); |
| |
| // Restore new target. |
| __ Pop(x3); |
| // Push the allocated receiver to the stack. 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. |
| __ Push(x0, x0); |
| |
| // ----------- S t a t e ------------- |
| // -- x3: new target |
| // -- sp[0*kPointerSize]: implicit receiver |
| // -- sp[1*kPointerSize]: implicit receiver |
| // -- sp[2*kPointerSize]: constructor function |
| // -- sp[3*kPointerSize]: number of arguments (tagged) |
| // -- sp[4*kPointerSize]: context |
| // ----------------------------------- |
| |
| // Restore constructor function and argument count. |
| __ Ldr(x1, MemOperand(fp, ConstructFrameConstants::kConstructorOffset)); |
| __ Ldr(x0, MemOperand(fp, ConstructFrameConstants::kLengthOffset)); |
| __ SmiUntag(x0); |
| |
| // Set up pointer to last argument. |
| __ Add(x2, fp, StandardFrameConstants::kCallerSPOffset); |
| |
| // Copy arguments and receiver to the expression stack. |
| // Copy 2 values every loop to use ldp/stp. |
| |
| // Compute pointer behind the first argument. |
| __ Add(x4, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| Label loop, entry, done_copying_arguments; |
| // ----------- S t a t e ------------- |
| // -- x0: number of arguments (untagged) |
| // -- x3: new target |
| // -- x2: pointer to last argument (caller sp) |
| // -- x4: pointer to argument last copied |
| // -- sp[0*kPointerSize]: implicit receiver |
| // -- sp[1*kPointerSize]: implicit receiver |
| // -- x1 and sp[2*kPointerSize]: constructor function |
| // -- sp[3*kPointerSize]: number of arguments (tagged) |
| // -- sp[4*kPointerSize]: context |
| // ----------------------------------- |
| __ B(&entry); |
| __ Bind(&loop); |
| __ Ldp(x10, x11, MemOperand(x4, -2 * kPointerSize, PreIndex)); |
| __ Push(x11, x10); |
| __ Bind(&entry); |
| __ Cmp(x4, x2); |
| __ B(gt, &loop); |
| // Because we copied values 2 by 2 we may have copied one extra value. |
| // Drop it if that is the case. |
| __ B(eq, &done_copying_arguments); |
| __ Drop(1); |
| __ Bind(&done_copying_arguments); |
| |
| // Call the function. |
| ParameterCount actual(x0); |
| __ InvokeFunction(x1, x3, actual, CALL_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // ----------- S t a t e ------------- |
| // -- x0: constructor result |
| // -- sp[0*kPointerSize]: implicit receiver |
| // -- sp[1*kPointerSize]: constructor function |
| // -- sp[2*kPointerSize]: number of arguments |
| // -- sp[3*kPointerSize]: context |
| // ----------------------------------- |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetConstructStubInvokeDeoptPCOffset( |
| masm->pc_offset()); |
| |
| // Restore the context from the frame. |
| __ Ldr(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, other_result, leave_frame; |
| |
| // If the result is undefined, we jump out to using the implicit receiver. |
| __ CompareRoot(x0, Heap::kUndefinedValueRootIndex); |
| __ B(eq, &use_receiver); |
| |
| // Otherwise we do a smi check and fall through to check if the return value |
| // is a valid receiver. |
| |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| __ JumpIfSmi(x0, &other_result); |
| |
| // 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. |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ JumpIfObjectType(x0, x4, x5, FIRST_JS_RECEIVER_TYPE, &leave_frame, ge); |
| |
| // The result is now neither undefined nor an object. |
| __ Bind(&other_result); |
| __ Ldr(x4, MemOperand(fp, ConstructFrameConstants::kConstructorOffset)); |
| __ Ldr(x4, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w4, FieldMemOperand(x4, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ tst(w4, Operand(SharedFunctionInfo::kClassConstructorMask)); |
| |
| if (restrict_constructor_return) { |
| // Throw if constructor function is a class constructor |
| __ B(eq, &use_receiver); |
| } else { |
| __ B(ne, &use_receiver); |
| __ CallRuntime( |
| Runtime::kIncrementUseCounterConstructorReturnNonUndefinedPrimitive); |
| __ B(&use_receiver); |
| } |
| |
| __ Bind(&do_throw); |
| __ CallRuntime(Runtime::kThrowConstructorReturnedNonObject); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ Bind(&use_receiver); |
| __ Peek(x0, 0 * kPointerSize); |
| __ CompareRoot(x0, Heap::kTheHoleValueRootIndex); |
| __ B(eq, &do_throw); |
| |
| __ Bind(&leave_frame); |
| // Restore smi-tagged arguments count from the frame. |
| __ Ldr(x1, MemOperand(fp, ConstructFrameConstants::kLengthOffset)); |
| // Leave construct frame. |
| } |
| // Remove caller arguments from the stack and return. |
| __ DropBySMI(x1); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } // namespace |
| |
| void Builtins::Generate_JSConstructStubGenericRestrictedReturn( |
| MacroAssembler* masm) { |
| Generate_JSConstructStubGeneric(masm, true); |
| } |
| void Builtins::Generate_JSConstructStubGenericUnrestrictedReturn( |
| MacroAssembler* masm) { |
| Generate_JSConstructStubGeneric(masm, false); |
| } |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSBuiltinsConstructStubHelper(masm); |
| } |
| void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) { |
| Generate_JSBuiltinsConstructStubHelper(masm); |
| } |
| |
| void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1); |
| __ CallRuntime(Runtime::kThrowConstructedNonConstructable); |
| } |
| |
| // static |
| void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the value to pass to the generator |
| // -- x1 : the JSGeneratorObject to resume |
| // -- x2 : the resume mode (tagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertGeneratorObject(x1); |
| |
| // Store input value into generator object. |
| __ Str(x0, FieldMemOperand(x1, JSGeneratorObject::kInputOrDebugPosOffset)); |
| __ RecordWriteField(x1, JSGeneratorObject::kInputOrDebugPosOffset, x0, x3, |
| kLRHasNotBeenSaved, kDontSaveFPRegs); |
| |
| // Store resume mode into generator object. |
| __ Str(x2, FieldMemOperand(x1, JSGeneratorObject::kResumeModeOffset)); |
| |
| // Load suspended function and context. |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| __ Ldr(cp, FieldMemOperand(x4, 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()); |
| __ Mov(x10, Operand(debug_hook)); |
| __ Ldrsb(x10, MemOperand(x10)); |
| __ CompareAndBranch(x10, Operand(0), ne, &prepare_step_in_if_stepping); |
| |
| // Flood function if we need to continue stepping in the suspended generator. |
| ExternalReference debug_suspended_generator = |
| ExternalReference::debug_suspended_generator_address(masm->isolate()); |
| __ Mov(x10, Operand(debug_suspended_generator)); |
| __ Ldr(x10, MemOperand(x10)); |
| __ CompareAndBranch(x10, Operand(x1), eq, |
| &prepare_step_in_suspended_generator); |
| __ Bind(&stepping_prepared); |
| |
| // Push receiver. |
| __ Ldr(x5, FieldMemOperand(x1, JSGeneratorObject::kReceiverOffset)); |
| __ Push(x5); |
| |
| // ----------- S t a t e ------------- |
| // -- x1 : the JSGeneratorObject to resume |
| // -- x2 : the resume mode (tagged) |
| // -- x4 : generator function |
| // -- cp : generator context |
| // -- lr : return address |
| // -- jssp[0] : generator receiver |
| // ----------------------------------- |
| |
| // 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. |
| __ Ldr(x10, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w10, |
| FieldMemOperand(x10, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ LoadRoot(x11, Heap::kTheHoleValueRootIndex); |
| __ PushMultipleTimes(x11, w10); |
| |
| // Underlying function needs to have bytecode available. |
| if (FLAG_debug_code) { |
| __ Ldr(x3, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x3, FieldMemOperand(x3, SharedFunctionInfo::kFunctionDataOffset)); |
| __ CompareObjectType(x3, x3, x3, BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kMissingBytecodeArray); |
| } |
| |
| // Resume (Ignition/TurboFan) generator object. |
| { |
| __ Ldr(x0, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w0, FieldMemOperand( |
| x0, 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(x3, x1); |
| __ Move(x1, x4); |
| __ Ldr(x5, FieldMemOperand(x1, JSFunction::kCodeEntryOffset)); |
| __ Jump(x5); |
| } |
| |
| __ Bind(&prepare_step_in_if_stepping); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1, x2, x4); |
| __ CallRuntime(Runtime::kDebugOnFunctionCall); |
| __ Pop(x2, x1); |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ B(&stepping_prepared); |
| |
| __ Bind(&prepare_step_in_suspended_generator); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1, x2); |
| __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator); |
| __ Pop(x2, x1); |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ B(&stepping_prepared); |
| } |
| |
| enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; |
| |
| // Clobbers x10, x15; preserves all other registers. |
| static void Generate_CheckStackOverflow(MacroAssembler* masm, Register argc, |
| IsTagged argc_is_tagged) { |
| // 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 enough_stack_space; |
| __ LoadRoot(x10, Heap::kRealStackLimitRootIndex); |
| // Make x10 the space we have left. The stack might already be overflowed |
| // here which will cause x10 to become negative. |
| // TODO(jbramley): Check that the stack usage here is safe. |
| __ Sub(x10, jssp, x10); |
| // Check if the arguments will overflow the stack. |
| if (argc_is_tagged == kArgcIsSmiTagged) { |
| __ Cmp(x10, Operand::UntagSmiAndScale(argc, kPointerSizeLog2)); |
| } else { |
| DCHECK(argc_is_tagged == kArgcIsUntaggedInt); |
| __ Cmp(x10, Operand(argc, LSL, kPointerSizeLog2)); |
| } |
| __ B(gt, &enough_stack_space); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| // We should never return from the APPLY_OVERFLOW builtin. |
| if (__ emit_debug_code()) { |
| __ Unreachable(); |
| } |
| |
| __ Bind(&enough_stack_space); |
| } |
| |
| // Input: |
| // x0: new.target. |
| // x1: function. |
| // x2: receiver. |
| // x3: argc. |
| // x4: argv. |
| // Output: |
| // x0: result. |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| // Called from JSEntryStub::GenerateBody(). |
| Register new_target = x0; |
| Register function = x1; |
| Register receiver = x2; |
| Register argc = x3; |
| Register argv = x4; |
| Register scratch = x10; |
| |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| { |
| // Enter an internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Setup the context (we need to use the caller context from the isolate). |
| __ Mov(scratch, Operand(ExternalReference(IsolateAddressId::kContextAddress, |
| masm->isolate()))); |
| __ Ldr(cp, MemOperand(scratch)); |
| |
| __ InitializeRootRegister(); |
| |
| // Push the function and the receiver onto the stack. |
| __ Push(function, receiver); |
| |
| // Check if we have enough stack space to push all arguments. |
| // Expects argument count in eax. Clobbers ecx, edx, edi. |
| Generate_CheckStackOverflow(masm, argc, kArgcIsUntaggedInt); |
| |
| // Copy arguments to the stack in a loop, in reverse order. |
| // x3: argc. |
| // x4: argv. |
| Label loop, entry; |
| // Compute the copy end address. |
| __ Add(scratch, argv, Operand(argc, LSL, kPointerSizeLog2)); |
| |
| __ B(&entry); |
| __ Bind(&loop); |
| __ Ldr(x11, MemOperand(argv, kPointerSize, PostIndex)); |
| __ Ldr(x12, MemOperand(x11)); // Dereference the handle. |
| __ Push(x12); // Push the argument. |
| __ Bind(&entry); |
| __ Cmp(scratch, argv); |
| __ B(ne, &loop); |
| |
| __ Mov(scratch, argc); |
| __ Mov(argc, new_target); |
| __ Mov(new_target, scratch); |
| // x0: argc. |
| // x3: new.target. |
| |
| // Initialize all JavaScript callee-saved registers, since they will be seen |
| // by the garbage collector as part of handlers. |
| // The original values have been saved in JSEntryStub::GenerateBody(). |
| __ LoadRoot(x19, Heap::kUndefinedValueRootIndex); |
| __ Mov(x20, x19); |
| __ Mov(x21, x19); |
| __ Mov(x22, x19); |
| __ Mov(x23, x19); |
| __ Mov(x24, x19); |
| __ Mov(x25, x19); |
| // Don't initialize the reserved registers. |
| // x26 : root register (root). |
| // x27 : context pointer (cp). |
| // x28 : JS stack pointer (jssp). |
| // x29 : frame pointer (fp). |
| |
| Handle<Code> builtin = is_construct |
| ? masm->isolate()->builtins()->Construct() |
| : masm->isolate()->builtins()->Call(); |
| __ Call(builtin, RelocInfo::CODE_TARGET); |
| |
| // Exit the JS internal frame and remove the parameters (except function), |
| // and return. |
| } |
| |
| // Result is in x0. Return. |
| __ Ret(); |
| } |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| static void ReplaceClosureEntryWithOptimizedCode( |
| MacroAssembler* masm, Register optimized_code_entry, Register closure, |
| Register scratch1, Register scratch2, Register scratch3) { |
| Register native_context = scratch1; |
| |
| // Store code entry in the closure. |
| __ Add(optimized_code_entry, optimized_code_entry, |
| Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Str(optimized_code_entry, |
| FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, optimized_code_entry, scratch2); |
| |
| // Link the closure into the optimized function list. |
| __ Ldr(native_context, NativeContextMemOperand()); |
| __ Ldr(scratch2, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| __ Str(scratch2, |
| FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset)); |
| __ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, scratch2, |
| scratch3, kLRHasNotBeenSaved, kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| const int function_list_offset = |
| Context::SlotOffset(Context::OPTIMIZED_FUNCTIONS_LIST); |
| __ Str(closure, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| __ Mov(scratch2, closure); |
| __ RecordWriteContextSlot(native_context, function_list_offset, scratch2, |
| scratch3, kLRHasNotBeenSaved, kDontSaveFPRegs); |
| } |
| |
| static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) { |
| Register args_count = scratch; |
| |
| // Get the arguments + receiver count. |
| __ ldr(args_count, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| __ Ldr(args_count.W(), |
| FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset)); |
| |
| // Leave the frame (also dropping the register file). |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| |
| // Drop receiver + arguments. |
| __ Drop(args_count, 1); |
| } |
| |
| // Tail-call |function_id| if |smi_entry| == |marker| |
| static void TailCallRuntimeIfMarkerEquals(MacroAssembler* masm, |
| Register smi_entry, |
| OptimizationMarker marker, |
| Runtime::FunctionId function_id) { |
| Label no_match; |
| __ CompareAndBranch(smi_entry, Operand(Smi::FromEnum(marker)), ne, &no_match); |
| GenerateTailCallToReturnedCode(masm, function_id); |
| __ bind(&no_match); |
| } |
| |
| static void MaybeTailCallOptimizedCodeSlot(MacroAssembler* masm, |
| Register feedback_vector, |
| Register scratch1, Register scratch2, |
| Register scratch3) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee if needed, and caller) |
| // -- x3 : new target (preserved for callee if needed, and caller) |
| // -- x1 : target function (preserved for callee if needed, and caller) |
| // -- feedback vector (preserved for caller if needed) |
| // ----------------------------------- |
| DCHECK( |
| !AreAliased(feedback_vector, x0, x1, x3, scratch1, scratch2, scratch3)); |
| |
| Label optimized_code_slot_is_cell, fallthrough; |
| |
| Register closure = x1; |
| Register optimized_code_entry = scratch1; |
| |
| const int kOptimizedCodeCellOffset = |
| FeedbackVector::kOptimizedCodeIndex * kPointerSize + |
| FeedbackVector::kHeaderSize; |
| __ Ldr(optimized_code_entry, |
| FieldMemOperand(feedback_vector, kOptimizedCodeCellOffset)); |
| |
| // Check if the code entry is a Smi. If yes, we interpret it as an |
| // optimisation marker. Otherwise, interpret is as a weak cell to a code |
| // object. |
| __ JumpIfNotSmi(optimized_code_entry, &optimized_code_slot_is_cell); |
| |
| { |
| // Optimized code slot is a Smi optimization marker. |
| |
| // Fall through if no optimization trigger. |
| __ CompareAndBranch(optimized_code_entry, |
| Operand(Smi::FromEnum(OptimizationMarker::kNone)), eq, |
| &fallthrough); |
| |
| TailCallRuntimeIfMarkerEquals(masm, optimized_code_entry, |
| OptimizationMarker::kCompileOptimized, |
| Runtime::kCompileOptimized_NotConcurrent); |
| TailCallRuntimeIfMarkerEquals( |
| masm, optimized_code_entry, |
| OptimizationMarker::kCompileOptimizedConcurrent, |
| Runtime::kCompileOptimized_Concurrent); |
| |
| { |
| // Otherwise, the marker is InOptimizationQueue. |
| if (FLAG_debug_code) { |
| __ Cmp( |
| optimized_code_entry, |
| Operand(Smi::FromEnum(OptimizationMarker::kInOptimizationQueue))); |
| __ Assert(eq, kExpectedOptimizationSentinel); |
| } |
| |
| // Checking whether the queued function is ready for install is optional, |
| // since we come across interrupts and stack checks elsewhere. However, |
| // not checking may delay installing ready functions, and always checking |
| // would be quite expensive. A good compromise is to first check against |
| // stack limit as a cue for an interrupt signal. |
| __ CompareRoot(masm->StackPointer(), Heap::kStackLimitRootIndex); |
| __ B(hs, &fallthrough); |
| GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode); |
| } |
| } |
| |
| { |
| // Optimized code slot is a WeakCell. |
| __ bind(&optimized_code_slot_is_cell); |
| |
| __ Ldr(optimized_code_entry, |
| FieldMemOperand(optimized_code_entry, WeakCell::kValueOffset)); |
| __ JumpIfSmi(optimized_code_entry, &fallthrough); |
| |
| // Check if the optimized code is marked for deopt. If it is, call the |
| // runtime to clear it. |
| Label found_deoptimized_code; |
| __ Ldr(scratch2, FieldMemOperand(optimized_code_entry, |
| Code::kKindSpecificFlags1Offset)); |
| __ TestAndBranchIfAnySet(scratch2, 1 << Code::kMarkedForDeoptimizationBit, |
| &found_deoptimized_code); |
| |
| // 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. |
| ReplaceClosureEntryWithOptimizedCode(masm, optimized_code_entry, closure, |
| scratch2, scratch3, feedback_vector); |
| __ Jump(optimized_code_entry); |
| |
| // Optimized code slot contains deoptimized code, evict it and re-enter the |
| // closure's code. |
| __ bind(&found_deoptimized_code); |
| GenerateTailCallToReturnedCode(masm, Runtime::kEvictOptimizedCodeSlot); |
| } |
| |
| // Fall-through if the optimized code cell is clear and there is no |
| // optimization marker. |
| __ bind(&fallthrough); |
| } |
| |
| // 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 actual argument count matches the formal parameter |
| // count expected by the function. |
| // |
| // The live registers are: |
| // - x1: the JS function object being called. |
| // - x3: the new target |
| // - cp: our context. |
| // - fp: our caller's frame pointer. |
| // - jssp: stack pointer. |
| // - lr: return address. |
| // |
| // The function builds an interpreter frame. See InterpreterFrameConstants in |
| // frames.h for its layout. |
| void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| Register closure = x1; |
| Register feedback_vector = x2; |
| |
| // Load the feedback vector from the closure. |
| __ Ldr(feedback_vector, |
| FieldMemOperand(closure, JSFunction::kFeedbackVectorOffset)); |
| __ Ldr(feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); |
| // Read off the optimized code slot in the feedback vector, and if there |
| // is optimized code or an optimization marker, call that instead. |
| MaybeTailCallOptimizedCodeSlot(masm, feedback_vector, x7, x4, x5); |
| |
| // 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). |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ Push(lr, fp, cp, closure); |
| __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp); |
| |
| // Get the bytecode array from the function object (or from the DebugInfo if |
| // it is present) and load it into kInterpreterBytecodeArrayRegister. |
| Label maybe_load_debug_bytecode_array, bytecode_array_loaded; |
| __ Ldr(x0, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(x0, SharedFunctionInfo::kFunctionDataOffset)); |
| __ Ldr(x11, FieldMemOperand(x0, SharedFunctionInfo::kDebugInfoOffset)); |
| __ JumpIfNotSmi(x11, &maybe_load_debug_bytecode_array); |
| __ Bind(&bytecode_array_loaded); |
| |
| // Check whether we should continue to use the interpreter. |
| // TODO(rmcilroy) Remove self healing once liveedit only has to deal with |
| // Ignition bytecode. |
| Label switch_to_different_code_kind; |
| __ Ldr(x0, FieldMemOperand(x0, SharedFunctionInfo::kCodeOffset)); |
| __ Cmp(x0, Operand(masm->CodeObject())); // Self-reference to this code. |
| __ B(ne, &switch_to_different_code_kind); |
| |
| // Increment invocation count for the function. |
| __ Ldr(x11, FieldMemOperand(closure, JSFunction::kFeedbackVectorOffset)); |
| __ Ldr(x11, FieldMemOperand(x11, Cell::kValueOffset)); |
| __ Ldr(x10, FieldMemOperand( |
| x11, FeedbackVector::kInvocationCountIndex * kPointerSize + |
| FeedbackVector::kHeaderSize)); |
| __ Add(x10, x10, Operand(Smi::FromInt(1))); |
| __ Str(x10, FieldMemOperand( |
| x11, FeedbackVector::kInvocationCountIndex * kPointerSize + |
| FeedbackVector::kHeaderSize)); |
| |
| // Check function data field is actually a BytecodeArray object. |
| if (FLAG_debug_code) { |
| __ AssertNotSmi(kInterpreterBytecodeArrayRegister, |
| kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, x0, x0, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Reset code age. |
| __ Mov(x10, Operand(BytecodeArray::kNoAgeBytecodeAge)); |
| __ Strb(x10, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kBytecodeAgeOffset)); |
| |
| // Load the initial bytecode offset. |
| __ Mov(kInterpreterBytecodeOffsetRegister, |
| Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); |
| |
| // Push new.target, bytecode array and Smi tagged bytecode array offset. |
| __ SmiTag(x0, kInterpreterBytecodeOffsetRegister); |
| __ Push(x3, kInterpreterBytecodeArrayRegister, x0); |
| |
| // Allocate the local and temporary register file on the stack. |
| { |
| // Load frame size from the BytecodeArray object. |
| __ Ldr(w11, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kFrameSizeOffset)); |
| |
| // Do a stack check to ensure we don't go over the limit. |
| Label ok; |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Sub(x10, jssp, Operand(x11)); |
| __ CompareRoot(x10, Heap::kRealStackLimitRootIndex); |
| __ B(hs, &ok); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ Bind(&ok); |
| |
| // If ok, push undefined as the initial value for all register file entries. |
| // Note: there should always be at least one stack slot for the return |
| // register in the register file. |
| Label loop_header; |
| __ LoadRoot(x10, Heap::kUndefinedValueRootIndex); |
| // TODO(rmcilroy): Ensure we always have an even number of registers to |
| // allow stack to be 16 bit aligned (and remove need for jssp). |
| __ Lsr(x11, x11, kPointerSizeLog2); |
| __ PushMultipleTimes(x10, x11); |
| __ Bind(&loop_header); |
| } |
| |
| // Load accumulator and dispatch table into registers. |
| __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); |
| __ Mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Dispatch to the first bytecode handler for the function. |
| __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2)); |
| __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1)); |
| __ Call(ip0); |
| masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset()); |
| |
| // The return value is in x0. |
| LeaveInterpreterFrame(masm, x2); |
| __ Ret(); |
| |
| // Load debug copy of the bytecode array if it exists. |
| // kInterpreterBytecodeArrayRegister is already loaded with |
| // SharedFunctionInfo::kFunctionDataOffset. |
| __ Bind(&maybe_load_debug_bytecode_array); |
| __ Ldr(x10, FieldMemOperand(x11, DebugInfo::kFlagsOffset)); |
| __ SmiUntag(x10); |
| __ TestAndBranchIfAllClear(x10, DebugInfo::kHasBreakInfo, |
| &bytecode_array_loaded); |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(x11, DebugInfo::kDebugBytecodeArrayOffset)); |
| __ B(&bytecode_array_loaded); |
| |
| // If the shared code is no longer this entry trampoline, then the underlying |
| // function has been switched to a different kind of code and we heal the |
| // closure by switching the code entry field over to the new code as well. |
| __ bind(&switch_to_different_code_kind); |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| __ Ldr(x7, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x7, FieldMemOperand(x7, SharedFunctionInfo::kCodeOffset)); |
| __ Add(x7, x7, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Str(x7, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, x7, x5); |
| __ Jump(x7); |
| } |
| |
| static void Generate_StackOverflowCheck(MacroAssembler* masm, Register num_args, |
| Register scratch, |
| Label* stack_overflow) { |
| // 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 enough_stack_space; |
| __ LoadRoot(scratch, Heap::kRealStackLimitRootIndex); |
| // Make scratch the space we have left. The stack might already be overflowed |
| // here which will cause scratch to become negative. |
| __ Sub(scratch, jssp, scratch); |
| // Check if the arguments will overflow the stack. |
| __ Cmp(scratch, Operand(num_args, LSL, kPointerSizeLog2)); |
| __ B(le, stack_overflow); |
| } |
| |
| static void Generate_InterpreterPushArgs(MacroAssembler* masm, |
| Register num_args, Register index, |
| Register last_arg, Register stack_addr, |
| Register scratch) { |
| __ Mov(scratch, num_args); |
| __ lsl(scratch, scratch, kPointerSizeLog2); |
| __ sub(last_arg, index, scratch); |
| |
| // Set stack pointer and where to stop. |
| __ Mov(stack_addr, jssp); |
| __ Claim(scratch, 1); |
| |
| // Push the arguments. |
| Label loop_header, loop_check; |
| __ B(&loop_check); |
| __ Bind(&loop_header); |
| // TODO(rmcilroy): Push two at a time once we ensure we keep stack aligned. |
| __ Ldr(scratch, MemOperand(index, -kPointerSize, PostIndex)); |
| __ Str(scratch, MemOperand(stack_addr, -kPointerSize, PreIndex)); |
| __ Bind(&loop_check); |
| __ Cmp(index, last_arg); |
| __ B(gt, &loop_header); |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsThenCallImpl( |
| MacroAssembler* masm, ConvertReceiverMode receiver_mode, |
| InterpreterPushArgsMode mode) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x2 : 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. |
| // -- x1 : the target to call (can be any Object). |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| // Add one for the receiver. |
| __ add(x3, x0, Operand(1)); |
| |
| // Add a stack check before pushing arguments. |
| Generate_StackOverflowCheck(masm, x3, x6, &stack_overflow); |
| |
| // Push "undefined" as the receiver arg if we need to. |
| if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) { |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| __ Mov(x3, x0); // Argument count is correct. |
| } |
| |
| // Push the arguments. x2, x4, x5, x6 will be modified. |
| Generate_InterpreterPushArgs(masm, x3, x2, x4, x5, x6); |
| |
| if (mode == InterpreterPushArgsMode::kWithFinalSpread) { |
| __ Pop(x2); // Pass the spread in a register |
| __ Sub(x0, x0, 1); // Subtract one for spread |
| } |
| |
| // Call the target. |
| if (mode == InterpreterPushArgsMode::kJSFunction) { |
| __ Jump( |
| masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny), |
| RelocInfo::CODE_TARGET); |
| } else if (mode == InterpreterPushArgsMode::kWithFinalSpread) { |
| __ Jump(masm->isolate()->builtins()->CallWithSpread(), |
| RelocInfo::CODE_TARGET); |
| } else { |
| __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Unreachable(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsThenConstructImpl( |
| MacroAssembler* masm, InterpreterPushArgsMode mode) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (not including receiver) |
| // -- x3 : new target |
| // -- x1 : constructor to call |
| // -- x2 : allocation site feedback if available, undefined otherwise |
| // -- x4 : address of the first argument |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| // Push a slot for the receiver. |
| __ Push(xzr); |
| |
| // Add a stack check before pushing arguments. |
| Generate_StackOverflowCheck(masm, x0, x7, &stack_overflow); |
| |
| // Push the arguments. x5, x4, x6, x7 will be modified. |
| Generate_InterpreterPushArgs(masm, x0, x4, x5, x6, x7); |
| |
| if (mode == InterpreterPushArgsMode::kWithFinalSpread) { |
| __ Pop(x2); // Pass the spread in a register |
| __ Sub(x0, x0, 1); // Subtract one for spread |
| } else { |
| __ AssertUndefinedOrAllocationSite(x2, x6); |
| } |
| |
| if (mode == InterpreterPushArgsMode::kJSFunction) { |
| __ AssertFunction(x1); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x4, FieldMemOperand(x4, SharedFunctionInfo::kConstructStubOffset)); |
| __ Add(x4, x4, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x4); |
| } else if (mode == InterpreterPushArgsMode::kWithFinalSpread) { |
| // Call the constructor with x0, x1, and x3 unmodified. |
| __ Jump(masm->isolate()->builtins()->ConstructWithSpread(), |
| RelocInfo::CODE_TARGET); |
| } else { |
| DCHECK_EQ(InterpreterPushArgsMode::kOther, mode); |
| // Call the constructor with x0, x1, and x3 unmodified. |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Unreachable(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsThenConstructArray( |
| MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (not including receiver) |
| // -- x1 : target to call verified to be Array function |
| // -- x2 : allocation site feedback if available, undefined otherwise. |
| // -- x3 : address of the first argument |
| // ----------------------------------- |
| Label stack_overflow; |
| |
| // Push a slot for the receiver. |
| __ Push(xzr); |
| |
| // Add a stack check before pushing arguments. |
| Generate_StackOverflowCheck(masm, x0, x7, &stack_overflow); |
| |
| // Push the arguments. x3, x5, x6, x7 will be modified. |
| Generate_InterpreterPushArgs(masm, x0, x3, x5, x6, x7); |
| |
| // Array constructor expects constructor in x3. It is same as call target. |
| __ mov(x3, x1); |
| |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| |
| __ bind(&stack_overflow); |
| { |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Unreachable(); |
| } |
| } |
| |
| static void Generate_InterpreterEnterBytecode(MacroAssembler* masm) { |
| // Set the return address to the correct point in the interpreter entry |
| // trampoline. |
| Smi* interpreter_entry_return_pc_offset( |
| masm->isolate()->heap()->interpreter_entry_return_pc_offset()); |
| DCHECK_NE(interpreter_entry_return_pc_offset, Smi::kZero); |
| __ LoadObject(x1, masm->isolate()->builtins()->InterpreterEntryTrampoline()); |
| __ Add(lr, x1, Operand(interpreter_entry_return_pc_offset->value() + |
| Code::kHeaderSize - kHeapObjectTag)); |
| |
| // Initialize the dispatch table register. |
| __ Mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Get the bytecode array pointer from the frame. |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| |
| if (FLAG_debug_code) { |
| // Check function data field is actually a BytecodeArray object. |
| __ AssertNotSmi(kInterpreterBytecodeArrayRegister, |
| kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, x1, x1, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Get the target bytecode offset from the frame. |
| __ Ldr(kInterpreterBytecodeOffsetRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| __ SmiUntag(kInterpreterBytecodeOffsetRegister); |
| |
| // Dispatch to the target bytecode. |
| __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2)); |
| __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1)); |
| __ Jump(ip0); |
| } |
| |
| void Builtins::Generate_InterpreterEnterBytecodeAdvance(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. |
| __ Ldr(x1, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| __ Ldr(x2, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(kInterpreterAccumulatorRegister, x1, x2); |
| __ CallRuntime(Runtime::kInterpreterAdvanceBytecodeOffset); |
| __ Mov(x2, x0); // Result is the new bytecode offset. |
| __ Pop(kInterpreterAccumulatorRegister); |
| } |
| __ Str(x2, MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| |
| Generate_InterpreterEnterBytecode(masm); |
| } |
| |
| void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) { |
| Generate_InterpreterEnterBytecode(masm); |
| } |
| |
| void Builtins::Generate_CheckOptimizationMarker(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x3 : new target (preserved for callee) |
| // -- x1 : target function (preserved for callee) |
| // ----------------------------------- |
| Register closure = x1; |
| |
| // Get the feedback vector. |
| Register feedback_vector = x2; |
| __ Ldr(feedback_vector, |
| FieldMemOperand(closure, JSFunction::kFeedbackVectorOffset)); |
| __ Ldr(feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); |
| |
| // The feedback vector must be defined. |
| if (FLAG_debug_code) { |
| __ CompareRoot(feedback_vector, Heap::kUndefinedValueRootIndex); |
| __ Assert(ne, BailoutReason::kExpectedFeedbackVector); |
| } |
| |
| // Is there an optimization marker or optimized code in the feedback vector? |
| MaybeTailCallOptimizedCodeSlot(masm, feedback_vector, x7, x4, x5); |
| |
| // Otherwise, tail call the SFI code. |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| void Builtins::Generate_CompileLazy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x3 : new target (preserved for callee) |
| // -- x1 : target function (preserved for callee) |
| // ----------------------------------- |
| // First lookup code, maybe we don't need to compile! |
| Label gotta_call_runtime; |
| |
| Register closure = x1; |
| Register feedback_vector = x2; |
| |
| // Do we have a valid feedback vector? |
| __ Ldr(feedback_vector, |
| FieldMemOperand(closure, JSFunction::kFeedbackVectorOffset)); |
| __ Ldr(feedback_vector, FieldMemOperand(feedback_vector, Cell::kValueOffset)); |
| __ JumpIfRoot(feedback_vector, Heap::kUndefinedValueRootIndex, |
| &gotta_call_runtime); |
| |
| // Is there an optimization marker or optimized code in the feedback vector? |
| MaybeTailCallOptimizedCodeSlot(masm, feedback_vector, x7, x4, x5); |
| |
| // We found no optimized code. |
| Register entry = x7; |
| __ Ldr(entry, |
| FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| |
| // If SFI points to anything other than CompileLazy, install that. |
| __ Ldr(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset)); |
| __ Move(x5, masm->CodeObject()); |
| __ Cmp(entry, x5); |
| __ B(eq, &gotta_call_runtime); |
| |
| // Install the SFI's code entry. |
| __ Add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Str(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, entry, x5); |
| __ Jump(entry); |
| |
| __ Bind(&gotta_call_runtime); |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x1 : new target (preserved for callee) |
| // -- x3 : target function (preserved for callee) |
| // ----------------------------------- |
| Label failed; |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Preserve argument count for later compare. |
| __ Move(x4, x0); |
| // Push a copy of the target function and the new target. |
| __ SmiTag(x0); |
| // Push another copy as a parameter to the runtime call. |
| __ Push(x0, x1, x3, x1); |
| |
| // Copy arguments from caller (stdlib, foreign, heap). |
| Label args_done; |
| for (int j = 0; j < 4; ++j) { |
| Label over; |
| if (j < 3) { |
| __ cmp(x4, Operand(j)); |
| __ B(ne, &over); |
| } |
| for (int i = j - 1; i >= 0; --i) { |
| __ ldr(x4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| i * kPointerSize)); |
| __ push(x4); |
| } |
| for (int i = 0; i < 3 - j; ++i) { |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| } |
| if (j < 3) { |
| __ jmp(&args_done); |
| __ bind(&over); |
| } |
| } |
| __ bind(&args_done); |
| |
| // Call runtime, on success unwind frame, and parent frame. |
| __ CallRuntime(Runtime::kInstantiateAsmJs, 4); |
| // A smi 0 is returned on failure, an object on success. |
| __ JumpIfSmi(x0, &failed); |
| |
| __ Drop(2); |
| __ pop(x4); |
| __ SmiUntag(x4); |
| scope.GenerateLeaveFrame(); |
| |
| __ add(x4, x4, Operand(1)); |
| __ Drop(x4); |
| __ Ret(); |
| |
| __ bind(&failed); |
| // Restore target function and new target. |
| __ Pop(x3, x1, x0); |
| __ SmiUntag(x0); |
| } |
| // On failure, tail call back to regular js. |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| // For now, we are relying on the fact that make_code_young doesn't do any |
| // garbage collection which allows us to save/restore the registers without |
| // worrying about which of them contain pointers. We also don't build an |
| // internal frame to make the code fast, since we shouldn't have to do stack |
| // crawls in MakeCodeYoung. This seems a bit fragile. |
| |
| // The following caller-saved registers must be saved and restored when |
| // calling through to the runtime: |
| // x0 - The address from which to resume execution. |
| // x1 - isolate |
| // x3 - new target |
| // lr - The return address for the JSFunction itself. It has not yet been |
| // preserved on the stack because the frame setup code was replaced |
| // with a call to this stub, to handle code ageing. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(x0, x1, x3, fp, lr); |
| __ Mov(x1, ExternalReference::isolate_address(masm->isolate())); |
| __ CallCFunction( |
| ExternalReference::get_make_code_young_function(masm->isolate()), 2); |
| __ Pop(lr, fp, x3, x1, x0); |
| } |
| |
| // The calling function has been made young again, so return to execute the |
| // real frame set-up code. |
| __ Br(x0); |
| } |
| |
| #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| void Builtins::Generate_Make##C##CodeYoungAgain(MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } |
| CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| |
| void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| // that make_code_young doesn't do any garbage collection which allows us to |
| // save/restore the registers without worrying about which of them contain |
| // pointers. |
| |
| // The following caller-saved registers must be saved and restored when |
| // calling through to the runtime: |
| // x0 - The address from which to resume execution. |
| // x1 - isolate |
| // x3 - new target |
| // lr - The return address for the JSFunction itself. It has not yet been |
| // preserved on the stack because the frame setup code was replaced |
| // with a call to this stub, to handle code ageing. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(x0, x1, x3, fp, lr); |
| __ Mov(x1, ExternalReference::isolate_address(masm->isolate())); |
| __ CallCFunction( |
| ExternalReference::get_mark_code_as_executed_function(masm->isolate()), |
| 2); |
| __ Pop(lr, fp, x3, x1, x0); |
| |
| // Perform prologue operations usually performed by the young code stub. |
| __ EmitFrameSetupForCodeAgePatching(masm); |
| } |
| |
| // Jump to point after the code-age stub. |
| __ Add(x0, x0, kNoCodeAgeSequenceLength); |
| __ Br(x0); |
| } |
| |
| void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { |
| GenerateMakeCodeYoungAgainCommon(masm); |
| } |
| |
| void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) { |
| Generate_MarkCodeAsExecutedOnce(masm); |
| } |
| |
| void Builtins::Generate_NotifyBuiltinContinuation(MacroAssembler* masm) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Preserve possible return result from lazy deopt. |
| __ Push(x0); |
| // Pass the function and deoptimization type to the runtime system. |
| __ CallRuntime(Runtime::kNotifyStubFailure, false); |
| __ Pop(x0); |
| } |
| |
| // Ignore state (pushed by Deoptimizer::EntryGenerator::Generate). |
| __ Drop(1); |
| |
| // Jump to the ContinueToBuiltin stub. Deoptimizer::EntryGenerator::Generate |
| // loads this into lr before it jumps here. |
| __ Br(lr); |
| } |
| |
| namespace { |
| void Generate_ContinueToBuiltinHelper(MacroAssembler* masm, |
| bool java_script_builtin, |
| bool with_result) { |
| const RegisterConfiguration* config(RegisterConfiguration::Turbofan()); |
| int allocatable_register_count = config->num_allocatable_general_registers(); |
| if (with_result) { |
| // Overwrite the hole inserted by the deoptimizer with the return value from |
| // the LAZY deopt point. |
| __ Str(x0, MemOperand( |
| jssp, |
| config->num_allocatable_general_registers() * kPointerSize + |
| 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)); |
| } |
| } |
| __ ldr(fp, |
| MemOperand(jssp, |
| BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp)); |
| __ Pop(ip0); |
| __ Add(jssp, jssp, |
| Operand(BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp)); |
| __ Pop(lr); |
| __ Add(ip0, ip0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Br(ip0); |
| } |
| } // 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); |
| } |
| |
| static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| Deoptimizer::BailoutType type) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Pass the deoptimization type to the runtime system. |
| __ Mov(x0, Smi::FromInt(static_cast<int>(type))); |
| __ Push(x0); |
| __ CallRuntime(Runtime::kNotifyDeoptimized); |
| } |
| |
| // Get the full codegen state from the stack and untag it. |
| Register state = x6; |
| __ Peek(state, 0); |
| __ SmiUntag(state); |
| |
| // Switch on the state. |
| Label with_tos_register, unknown_state; |
| __ CompareAndBranch(state, |
| static_cast<int>(Deoptimizer::BailoutState::NO_REGISTERS), |
| ne, &with_tos_register); |
| __ Drop(1); // Remove state. |
| __ Ret(); |
| |
| __ Bind(&with_tos_register); |
| // Reload TOS register. |
| DCHECK_EQ(kInterpreterAccumulatorRegister.code(), x0.code()); |
| __ Peek(x0, kPointerSize); |
| __ CompareAndBranch(state, |
| static_cast<int>(Deoptimizer::BailoutState::TOS_REGISTER), |
| ne, &unknown_state); |
| __ Drop(2); // Remove state and TOS. |
| __ Ret(); |
| |
| __ Bind(&unknown_state); |
| __ Abort(kInvalidFullCodegenState); |
| } |
| |
| void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| } |
| |
| void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| } |
| |
| void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| } |
| |
| static void Generate_OnStackReplacementHelper(MacroAssembler* masm, |
| bool has_handler_frame) { |
| // Lookup the function in the JavaScript frame. |
| if (has_handler_frame) { |
| __ Ldr(x0, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(x0, MemOperand(x0, JavaScriptFrameConstants::kFunctionOffset)); |
| } else { |
| __ Ldr(x0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Pass function as argument. |
| __ Push(x0); |
| __ CallRuntime(Runtime::kCompileForOnStackReplacement); |
| } |
| |
| // If the code object is null, just return to the caller. |
| Label skip; |
| __ CompareAndBranch(x0, Smi::kZero, ne, &skip); |
| __ Ret(); |
| |
| __ Bind(&skip); |
| |
| // Drop any potential handler frame that is be sitting on top of the actual |
| // JavaScript frame. This is the case then OSR is triggered from bytecode. |
| if (has_handler_frame) { |
| __ LeaveFrame(StackFrame::STUB); |
| } |
| |
| // Load deoptimization data from the code object. |
| // <deopt_data> = <code>[#deoptimization_data_offset] |
| __ Ldr(x1, MemOperand(x0, Code::kDeoptimizationDataOffset - kHeapObjectTag)); |
| |
| // Load the OSR entrypoint offset from the deoptimization data. |
| // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset] |
| __ Ldrsw(w1, UntagSmiFieldMemOperand( |
| x1, FixedArray::OffsetOfElementAt( |
| DeoptimizationInputData::kOsrPcOffsetIndex))); |
| |
| // Compute the target address = code_obj + header_size + osr_offset |
| // <entry_addr> = <code_obj> + #header_size + <osr_offset> |
| __ Add(x0, x0, x1); |
| __ Add(lr, x0, Code::kHeaderSize - kHeapObjectTag); |
| |
| // And "return" to the OSR entry point of the function. |
| __ Ret(); |
| } |
| |
| void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, false); |
| } |
| |
| void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, true); |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argArray (if argc == 2) |
| // -- jssp[8] : thisArg (if argc >= 1) |
| // -- jssp[16] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_FunctionPrototypeApply"); |
| |
| Register argc = x0; |
| Register arg_array = x2; |
| Register receiver = x1; |
| Register this_arg = x0; |
| Register undefined_value = x3; |
| Register null_value = x4; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| __ LoadRoot(null_value, Heap::kNullValueRootIndex); |
| |
| // 1. Load receiver into x1, argArray into x2 (if present), remove all |
| // arguments from the stack (including the receiver), and push thisArg (if |
| // present) instead. |
| { |
| // Claim (2 - argc) dummy arguments from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(2); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argArray (dummy value if argc <= 1) |
| // -- jssp[8] : thisArg (dummy value if argc == 0) |
| // -- jssp[16] : receiver |
| // ----------------------------------- |
| __ Cmp(argc, 1); |
| __ Pop(arg_array, this_arg); // Overwrites argc. |
| __ CmovX(this_arg, undefined_value, lo); // undefined if argc == 0. |
| __ CmovX(arg_array, undefined_value, ls); // undefined if argc <= 1. |
| |
| __ Peek(receiver, 0); |
| __ Poke(this_arg, 0); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x2 : argArray |
| // -- x1 : receiver |
| // -- jssp[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; |
| __ Cmp(arg_array, null_value); |
| __ Ccmp(arg_array, undefined_value, ZFlag, ne); |
| __ B(eq, &no_arguments); |
| |
| // 4a. Apply the receiver to the given argArray. |
| __ Jump(masm->isolate()->builtins()->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); |
| { |
| __ Mov(x0, 0); |
| DCHECK(receiver.Is(x1)); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { |
| Register argc = x0; |
| Register function = x1; |
| Register scratch1 = x10; |
| Register scratch2 = x11; |
| |
| ASM_LOCATION("Builtins::Generate_FunctionPrototypeCall"); |
| |
| // 1. Make sure we have at least one argument. |
| { |
| Label done; |
| __ Cbnz(argc, &done); |
| __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex); |
| __ Push(scratch1); |
| __ Mov(argc, 1); |
| __ Bind(&done); |
| } |
| |
| // 2. Get the callable to call (passed as receiver) from the stack. |
| __ Peek(function, Operand(argc, LSL, kXRegSizeLog2)); |
| |
| // 3. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| { |
| Label loop; |
| // Calculate the copy start address (destination). Copy end address is jssp. |
| __ Add(scratch2, jssp, Operand(argc, LSL, kPointerSizeLog2)); |
| __ Sub(scratch1, scratch2, kPointerSize); |
| |
| __ Bind(&loop); |
| __ Ldr(x12, MemOperand(scratch1, -kPointerSize, PostIndex)); |
| __ Str(x12, MemOperand(scratch2, -kPointerSize, PostIndex)); |
| __ Cmp(scratch1, jssp); |
| __ B(ge, &loop); |
| // Adjust the actual number of arguments and remove the top element |
| // (which is a copy of the last argument). |
| __ Sub(argc, argc, 1); |
| __ Drop(1); |
| } |
| |
| // 4. Call the callable. |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_ReflectApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argumentsList (if argc == 3) |
| // -- jssp[8] : thisArgument (if argc >= 2) |
| // -- jssp[16] : target (if argc >= 1) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ReflectApply"); |
| |
| Register argc = x0; |
| Register arguments_list = x2; |
| Register target = x1; |
| Register this_argument = x4; |
| Register undefined_value = x3; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| |
| // 1. Load target into x1 (if present), argumentsList into x2 (if present), |
| // remove all arguments from the stack (including the receiver), and push |
| // thisArgument (if present) instead. |
| { |
| // Claim (3 - argc) dummy arguments from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(3); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argumentsList (dummy value if argc <= 2) |
| // -- jssp[8] : thisArgument (dummy value if argc <= 1) |
| // -- jssp[16] : target (dummy value if argc == 0) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| __ Adds(x10, argc, 0); // Preserve argc, and set the Z flag if it is zero. |
| __ Pop(arguments_list, this_argument, target); // Overwrites argc. |
| __ CmovX(target, undefined_value, eq); // undefined if argc == 0. |
| __ Cmp(x10, 2); |
| __ CmovX(this_argument, undefined_value, lo); // undefined if argc <= 1. |
| __ CmovX(arguments_list, undefined_value, ls); // undefined if argc <= 2. |
| |
| __ Poke(this_argument, 0); // Overwrite receiver. |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x2 : argumentsList |
| // -- x1 : target |
| // -- jssp[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(masm->isolate()->builtins()->CallWithArrayLike(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : new.target (optional) |
| // -- jssp[8] : argumentsList |
| // -- jssp[16] : target |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ReflectConstruct"); |
| |
| Register argc = x0; |
| Register arguments_list = x2; |
| Register target = x1; |
| Register new_target = x3; |
| Register undefined_value = x4; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| |
| // 1. Load target into x1 (if present), argumentsList into x2 (if present), |
| // new.target into x3 (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 from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(3); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : new.target (dummy value if argc <= 2) |
| // -- jssp[8] : argumentsList (dummy value if argc <= 1) |
| // -- jssp[16] : target (dummy value if argc == 0) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| __ Adds(x10, argc, 0); // Preserve argc, and set the Z flag if it is zero. |
| __ Pop(new_target, arguments_list, target); // Overwrites argc. |
| __ CmovX(target, undefined_value, eq); // undefined if argc == 0. |
| __ Cmp(x10, 2); |
| __ CmovX(arguments_list, undefined_value, lo); // undefined if argc <= 1. |
| __ CmovX(new_target, target, ls); // target if argc <= 2. |
| |
| __ Poke(undefined_value, 0); // Overwrite receiver. |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x2 : argumentsList |
| // -- x1 : target |
| // -- x3 : new.target |
| // -- jssp[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(masm->isolate()->builtins()->ConstructWithArrayLike(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ Push(lr, fp); |
| __ Mov(x11, StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ Push(x11, x1); // x1: function |
| // We do not yet push the number of arguments, to maintain a 16-byte aligned |
| // stack pointer. This is done in step (3) in |
| // Generate_ArgumentsAdaptorTrampoline. |
| __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp); |
| } |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : result being passed through |
| // ----------------------------------- |
| // Get the number of arguments passed (as a smi), tear down the frame and |
| // then drop the parameters and the receiver. |
| __ Ldr(x10, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp + |
| kPointerSize))); |
| __ Mov(jssp, fp); |
| __ Pop(fp, lr); |
| |
| // Drop actual parameters and receiver. |
| // TODO(all): This will need to be rounded up to a multiple of two when using |
| // the CSP, as we will have claimed an even number of slots in total for the |
| // parameters. |
| __ DropBySMI(x10, kXRegSize); |
| __ Drop(1); |
| } |
| |
| // static |
| void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm, |
| Handle<Code> code) { |
| // ----------- S t a t e ------------- |
| // -- x1 : target |
| // -- x0 : number of parameters on the stack (not including the receiver) |
| // -- x2 : arguments list (a FixedArray) |
| // -- x4 : len (number of elements to push from args) |
| // -- x3 : new.target (for [[Construct]]) |
| // ----------------------------------- |
| __ AssertFixedArray(x2); |
| |
| Register arguments_list = x2; |
| Register argc = x0; |
| Register len = x4; |
| |
| // Check for stack overflow. |
| { |
| // 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 done; |
| __ LoadRoot(x10, Heap::kRealStackLimitRootIndex); |
| // Make x10 the space we have left. The stack might already be overflowed |
| // here which will cause x10 to become negative. |
| __ Sub(x10, masm->StackPointer(), x10); |
| // Check if the arguments will overflow the stack. |
| __ Cmp(x10, Operand(len, LSL, kPointerSizeLog2)); |
| __ B(gt, &done); // Signed comparison. |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Bind(&done); |
| } |
| |
| // Push arguments onto the stack (thisArgument is already on the stack). |
| { |
| Label done, push, loop; |
| Register src = x5; |
| |
| __ Add(src, arguments_list, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Add(argc, argc, len); // The 'len' argument for Call() or Construct(). |
| __ Cbz(len, &done); |
| Register the_hole_value = x11; |
| Register undefined_value = x12; |
| // We do not use the CompareRoot macro as it would do a LoadRoot behind the |
| // scenes and we want to avoid that in a loop. |
| __ LoadRoot(the_hole_value, Heap::kTheHoleValueRootIndex); |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| __ Claim(len); |
| __ Bind(&loop); |
| __ Sub(len, len, 1); |
| __ Ldr(x10, MemOperand(src, kPointerSize, PostIndex)); |
| __ Cmp(x10, the_hole_value); |
| __ Csel(x10, x10, undefined_value, ne); |
| __ Poke(x10, Operand(len, LSL, kPointerSizeLog2)); |
| __ Cbnz(len, &loop); |
| __ Bind(&done); |
| } |
| |
| // Tail-call to the actual Call or Construct builtin. |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| } |
| |
| // static |
| void Builtins::Generate_CallOrConstructForwardVarargs(MacroAssembler* masm, |
| Handle<Code> code) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x3 : the new.target (for [[Construct]] calls) |
| // -- x1 : the target to call (can be any Object) |
| // -- x2 : start index (to support rest parameters) |
| // ----------------------------------- |
| |
| // Check if we have an arguments adaptor frame below the function frame. |
| Label arguments_adaptor, arguments_done; |
| __ Ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(x4, MemOperand(x5, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ Cmp(x4, StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ B(eq, &arguments_adaptor); |
| { |
| __ Ldr(x6, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Ldr(x6, FieldMemOperand(x6, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldrsw(x6, FieldMemOperand( |
| x6, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ Mov(x5, fp); |
| } |
| __ B(&arguments_done); |
| __ Bind(&arguments_adaptor); |
| { |
| // Just load the length from ArgumentsAdaptorFrame. |
| __ Ldrsw(x6, UntagSmiMemOperand( |
| x5, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| } |
| __ Bind(&arguments_done); |
| |
| Label stack_done, stack_overflow; |
| __ Subs(x6, x6, x2); |
| __ B(le, &stack_done); |
| { |
| // Check for stack overflow. |
| Generate_StackOverflowCheck(masm, x6, x2, &stack_overflow); |
| |
| // Forward the arguments from the caller frame. |
| { |
| Label loop; |
| __ Add(x5, x5, kPointerSize); |
| __ Add(x0, x0, x6); |
| __ bind(&loop); |
| { |
| __ Ldr(x4, MemOperand(x5, x6, LSL, kPointerSizeLog2)); |
| __ Push(x4); |
| __ Subs(x6, x6, 1); |
| __ B(ne, &loop); |
| } |
| } |
| } |
| __ B(&stack_done); |
| __ Bind(&stack_overflow); |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Bind(&stack_done); |
| |
| __ Jump(code, RelocInfo::CODE_TARGET); |
| } |
| |
| // static |
| void Builtins::Generate_CallFunction(MacroAssembler* masm, |
| ConvertReceiverMode mode) { |
| ASM_LOCATION("Builtins::Generate_CallFunction"); |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| // Check that function is not a "classConstructor". |
| Label class_constructor; |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w3, FieldMemOperand(x2, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ TestAndBranchIfAnySet(w3, SharedFunctionInfo::kClassConstructorMask, |
| &class_constructor); |
| |
| // 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. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| // We need to convert the receiver for non-native sloppy mode functions. |
| Label done_convert; |
| __ TestAndBranchIfAnySet(w3, |
| SharedFunctionInfo::IsNativeBit::kMask | |
| SharedFunctionInfo::IsStrictBit::kMask, |
| &done_convert); |
| { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // -- x2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| if (mode == ConvertReceiverMode::kNullOrUndefined) { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(x3); |
| } else { |
| Label convert_to_object, convert_receiver; |
| __ Peek(x3, Operand(x0, LSL, kXRegSizeLog2)); |
| __ JumpIfSmi(x3, &convert_to_object); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CompareObjectType(x3, x4, x4, FIRST_JS_RECEIVER_TYPE); |
| __ B(hs, &done_convert); |
| if (mode != ConvertReceiverMode::kNotNullOrUndefined) { |
| Label convert_global_proxy; |
| __ JumpIfRoot(x3, Heap::kUndefinedValueRootIndex, |
| &convert_global_proxy); |
| __ JumpIfNotRoot(x3, Heap::kNullValueRootIndex, &convert_to_object); |
| __ Bind(&convert_global_proxy); |
| { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(x3); |
| } |
| __ B(&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(x0); |
| __ Push(x0, x1); |
| __ Mov(x0, x3); |
| __ Push(cp); |
| __ Call(masm->isolate()->builtins()->ToObject(), |
| RelocInfo::CODE_TARGET); |
| __ Pop(cp); |
| __ Mov(x3, x0); |
| __ Pop(x1, x0); |
| __ SmiUntag(x0); |
| } |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Bind(&convert_receiver); |
| } |
| __ Poke(x3, Operand(x0, LSL, kXRegSizeLog2)); |
| } |
| __ Bind(&done_convert); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // -- x2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| __ Ldrsw( |
| x2, FieldMemOperand(x2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| ParameterCount actual(x0); |
| ParameterCount expected(x2); |
| __ InvokeFunctionCode(x1, no_reg, expected, actual, JUMP_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // The function is a "classConstructor", need to raise an exception. |
| __ bind(&class_constructor); |
| { |
| FrameScope frame(masm, StackFrame::INTERNAL); |
| __ Push(x1); |
| __ CallRuntime(Runtime::kThrowConstructorNonCallableError); |
| } |
| } |
| |
| namespace { |
| |
| void Generate_PushBoundArguments(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : target (checked to be a JSBoundFunction) |
| // -- x3 : new.target (only in case of [[Construct]]) |
| // ----------------------------------- |
| |
| // Load [[BoundArguments]] into x2 and length of that into x4. |
| Label no_bound_arguments; |
| __ Ldr(x2, FieldMemOperand(x1, JSBoundFunction::kBoundArgumentsOffset)); |
| __ Ldrsw(x4, UntagSmiFieldMemOperand(x2, FixedArray::kLengthOffset)); |
| __ Cmp(x4, 0); |
| __ B(eq, &no_bound_arguments); |
| { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : target (checked to be a JSBoundFunction) |
| // -- x2 : the [[BoundArguments]] (implemented as FixedArray) |
| // -- x3 : new.target (only in case of [[Construct]]) |
| // -- x4 : the number of [[BoundArguments]] |
| // ----------------------------------- |
| |
| // Reserve stack space for the [[BoundArguments]]. |
| { |
| Label done; |
| __ Claim(x4); |
| // 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". |
| __ CompareRoot(jssp, Heap::kRealStackLimitRootIndex); |
| __ B(gt, &done); // Signed comparison. |
| // Restore the stack pointer. |
| __ Drop(x4); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ EnterFrame(StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| } |
| __ Bind(&done); |
| } |
| |
| // Relocate arguments down the stack. |
| { |
| Label loop, done_loop; |
| __ Mov(x5, 0); |
| __ Bind(&loop); |
| __ Cmp(x5, x0); |
| __ B(gt, &done_loop); |
| __ Peek(x10, Operand(x4, LSL, kPointerSizeLog2)); |
| __ Poke(x10, Operand(x5, LSL, kPointerSizeLog2)); |
| __ Add(x4, x4, 1); |
| __ Add(x5, x5, 1); |
| __ B(&loop); |
| __ Bind(&done_loop); |
| } |
| |
| // Copy [[BoundArguments]] to the stack (below the arguments). |
| { |
| Label loop; |
| __ Ldrsw(x4, UntagSmiFieldMemOperand(x2, FixedArray::kLengthOffset)); |
| __ Add(x2, x2, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Bind(&loop); |
| __ Sub(x4, x4, 1); |
| __ Ldr(x10, MemOperand(x2, x4, LSL, kPointerSizeLog2)); |
| __ Poke(x10, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x0, x0, 1); |
| __ Cmp(x4, 0); |
| __ B(gt, &loop); |
| } |
| } |
| __ Bind(&no_bound_arguments); |
| } |
| |
| } // namespace |
| |
| // static |
| void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSBoundFunction) |
| // ----------------------------------- |
| __ AssertBoundFunction(x1); |
| |
| // Patch the receiver to [[BoundThis]]. |
| __ Ldr(x10, FieldMemOperand(x1, JSBoundFunction::kBoundThisOffset)); |
| __ Poke(x10, Operand(x0, LSL, kPointerSizeLog2)); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Call the [[BoundTargetFunction]] via the Call builtin. |
| __ Ldr(x1, FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Mov(x10, |
| ExternalReference(Builtins::kCall_ReceiverIsAny, masm->isolate())); |
| __ Ldr(x11, MemOperand(x10)); |
| __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x12); |
| } |
| |
| // static |
| void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| Label non_callable, non_function, non_smi; |
| __ JumpIfSmi(x1, &non_callable); |
| __ Bind(&non_smi); |
| __ CompareObjectType(x1, x4, x5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallFunction(mode), |
| RelocInfo::CODE_TARGET, eq); |
| __ Cmp(x5, JS_BOUND_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallBoundFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Call]] internal method. |
| __ Ldrb(x4, FieldMemOperand(x4, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x4, 1 << Map::kIsCallable, &non_callable); |
| |
| // Check if target is a proxy and call CallProxy external builtin |
| __ Cmp(x5, JS_PROXY_TYPE); |
| __ B(ne, &non_function); |
| |
| __ Mov(x5, ExternalReference(Builtins::kCallProxy, masm->isolate())); |
| __ Ldr(x5, MemOperand(x5)); |
| __ Add(x6, x5, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x6); |
| |
| // 2. Call to something else, which might have a [[Call]] internal method (if |
| // not we raise an exception). |
| __ Bind(&non_function); |
| // Overwrite the original receiver with the (original) target. |
| __ Poke(x1, Operand(x0, LSL, kXRegSizeLog2)); |
| // Let the "call_as_function_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_FUNCTION_DELEGATE_INDEX, x1); |
| __ 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(x1); |
| __ CallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_ConstructFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (checked to be a JSFunction) |
| // -- x3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // Calling convention for function specific ConstructStubs require |
| // x2 to contain either an AllocationSite or undefined. |
| __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x4, FieldMemOperand(x4, SharedFunctionInfo::kConstructStubOffset)); |
| __ Add(x4, x4, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x4); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSBoundFunction) |
| // -- x3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertBoundFunction(x1); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Patch new.target to [[BoundTargetFunction]] if new.target equals target. |
| { |
| Label done; |
| __ Cmp(x1, x3); |
| __ B(ne, &done); |
| __ Ldr(x3, |
| FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Bind(&done); |
| } |
| |
| // Construct the [[BoundTargetFunction]] via the Construct builtin. |
| __ Ldr(x1, FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Mov(x10, ExternalReference(Builtins::kConstruct, masm->isolate())); |
| __ Ldr(x11, MemOperand(x10)); |
| __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x12); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructProxy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (checked to be a JSProxy) |
| // -- x3 : the new target (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Call into the Runtime for Proxy [[Construct]]. |
| __ Push(x1); |
| __ Push(x3); |
| // Include the pushed new_target, constructor and the receiver. |
| __ Add(x0, x0, 3); |
| // Tail-call to the runtime. |
| __ JumpToExternalReference( |
| ExternalReference(Runtime::kJSProxyConstruct, masm->isolate())); |
| } |
| |
| // static |
| void Builtins::Generate_Construct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (can be any Object) |
| // -- x3 : 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; |
| __ JumpIfSmi(x1, &non_constructor); |
| |
| // Dispatch based on instance type. |
| __ CompareObjectType(x1, x4, x5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Construct]] internal method. |
| __ Ldrb(x2, FieldMemOperand(x4, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x2, 1 << Map::kIsConstructor, &non_constructor); |
| |
| // Only dispatch to bound functions after checking whether they are |
| // constructors. |
| __ Cmp(x5, JS_BOUND_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructBoundFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Only dispatch to proxies after checking whether they are constructors. |
| __ Cmp(x5, JS_PROXY_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET, |
| eq); |
| |
| // Called Construct on an exotic Object with a [[Construct]] internal method. |
| { |
| // Overwrite the original receiver with the (original) target. |
| __ Poke(x1, Operand(x0, LSL, kXRegSizeLog2)); |
| // Let the "call_as_constructor_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, x1); |
| __ 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(masm->isolate()->builtins()->ConstructedNonConstructable(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_AllocateInNewSpace"); |
| // ----------- S t a t e ------------- |
| // -- x1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(x1); |
| __ Push(x1); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAllocateInNewSpace); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_AllocateInOldSpace"); |
| // ----------- S t a t e ------------- |
| // -- x1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(x1); |
| __ Move(x2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE))); |
| __ Push(x1, x2); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAllocateInTargetSpace); |
| } |
| |
| // static |
| void Builtins::Generate_Abort(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_Abort"); |
| // ----------- S t a t e ------------- |
| // -- x1 : message_id as Smi |
| // -- lr : return address |
| // ----------------------------------- |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| __ Push(x1); |
| __ Move(cp, Smi::kZero); |
| __ TailCallRuntime(Runtime::kAbort); |
| } |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_ArgumentsAdaptorTrampoline"); |
| // ----------- S t a t e ------------- |
| // -- x0 : actual number of arguments |
| // -- x1 : function (passed through to callee) |
| // -- x2 : expected number of arguments |
| // -- x3 : new target (passed through to callee) |
| // ----------------------------------- |
| |
| // The frame we are about to construct will look like: |
| // |
| // slot Adaptor frame |
| // +-----------------+-------------------------------- |
| // -n-1 | receiver | ^ |
| // | (parameter 0) | | |
| // |- - - - - - - - -| | |
| // -n | | Caller |
| // ... | ... | frame slots --> actual args |
| // -2 | parameter n-1 | | |
| // |- - - - - - - - -| | |
| // -1 | parameter n | v |
| // -----+-----------------+-------------------------------- |
| // 0 | return addr | ^ |
| // |- - - - - - - - -| | |
| // 1 | saved frame ptr | <-- frame ptr | |
| // |- - - - - - - - -| | |
| // 2 |Frame Type Marker| | |
| // |- - - - - - - - -| | |
| // 3 | function | Callee |
| // |- - - - - - - - -| frame slots |
| // 4 | num of | | |
| // | actual args | | |
| // |- - - - - - - - -| | |
| // [5] | [padding] | | |
| // |-----------------+---- | |
| // 5+pad | receiver | ^ | |
| // | (parameter 0) | | | |
| // |- - - - - - - - -| | | |
| // 6+pad | parameter 1 | | | |
| // |- - - - - - - - -| Frame slots ----> expected args |
| // 7+pad | parameter 2 | | | |
| // |- - - - - - - - -| | | |
| // | | | | |
| // ... | ... | | | |
| // | parameter m | | | |
| // |- - - - - - - - -| | | |
| // | [undefined] | | | |
| // |- - - - - - - - -| | | |
| // | | | | |
| // | ... | | | |
| // | [undefined] | v <-- stack ptr v |
| // -----+-----------------+--------------------------------- |
| // |
| // There is an optional slot of padding to ensure stack alignment. |
| // If the number of expected arguments is larger than the number of actual |
| // arguments, the remaining expected slots will be filled with undefined. |
| |
| Register argc_actual = x0; // Excluding the receiver. |
| Register argc_expected = x2; // Excluding the receiver. |
| Register function = x1; |
| Register code_entry = x10; |
| |
| Label dont_adapt_arguments, stack_overflow; |
| |
| Label enough_arguments; |
| __ Cmp(argc_expected, SharedFunctionInfo::kDontAdaptArgumentsSentinel); |
| __ B(eq, &dont_adapt_arguments); |
| |
| EnterArgumentsAdaptorFrame(masm); |
| |
| Register copy_from = x10; |
| Register copy_end = x11; |
| Register copy_to = x12; |
| Register argc_to_copy = x13; |
| Register argc_unused_actual = x14; |
| Register scratch1 = x15, scratch2 = x16; |
| |
| // We need slots for the expected arguments, with two extra slots for the |
| // number of actual arguments and the receiver. |
| __ RecordComment("-- Stack check --"); |
| __ Add(scratch1, argc_expected, 2); |
| Generate_StackOverflowCheck(masm, scratch1, scratch2, &stack_overflow); |
| |
| // Round up number of slots to be even, to maintain stack alignment. |
| __ RecordComment("-- Allocate callee frame slots --"); |
| __ Add(scratch1, scratch1, 1); |
| __ Bic(scratch1, scratch1, 1); |
| __ Claim(scratch1, kPointerSize); |
| |
| __ Mov(copy_to, jssp); |
| |
| // Preparing the expected arguments is done in four steps, the order of |
| // which is chosen so we can use LDP/STP and avoid conditional branches as |
| // much as possible. |
| |
| // (1) If we don't have enough arguments, fill the remaining expected |
| // arguments with undefined, otherwise skip this step. |
| __ Subs(scratch1, argc_actual, argc_expected); |
| __ Csel(argc_unused_actual, xzr, scratch1, lt); |
| __ Csel(argc_to_copy, argc_expected, argc_actual, ge); |
| __ B(ge, &enough_arguments); |
| |
| // Fill the remaining expected arguments with undefined. |
| __ RecordComment("-- Fill slots with undefined --"); |
| __ Sub(copy_end, copy_to, Operand(scratch1, LSL, kPointerSizeLog2)); |
| __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex); |
| |
| Label fill; |
| __ Bind(&fill); |
| __ Stp(scratch1, scratch1, MemOperand(copy_to, 2 * kPointerSize, PostIndex)); |
| // We might write one slot extra, but that is ok because we'll overwrite it |
| // below. |
| __ Cmp(copy_end, copy_to); |
| __ B(hi, &fill); |
| |
| // Correct copy_to, for the case where we wrote one additional slot. |
| __ Mov(copy_to, copy_end); |
| |
| __ Bind(&enough_arguments); |
| // (2) Copy all of the actual arguments, or as many as we need. |
| __ RecordComment("-- Copy actual arguments --"); |
| __ Add(copy_end, copy_to, Operand(argc_to_copy, LSL, kPointerSizeLog2)); |
| __ Add(copy_from, fp, 2 * kPointerSize); |
| // Adjust for difference between actual and expected arguments. |
| __ Add(copy_from, copy_from, |
| Operand(argc_unused_actual, LSL, kPointerSizeLog2)); |
| |
| // Copy arguments. We use load/store pair instructions, so we might overshoot |
| // by one slot, but since we copy the arguments starting from the last one, if |
| // we do overshoot, the extra slot will be overwritten later by the receiver. |
| Label copy_2_by_2; |
| __ Bind(©_2_by_2); |
| __ Ldp(scratch1, scratch2, |
| MemOperand(copy_from, 2 * kPointerSize, PostIndex)); |
| __ Stp(scratch1, scratch2, MemOperand(copy_to, 2 * kPointerSize, PostIndex)); |
| __ Cmp(copy_end, copy_to); |
| __ B(hi, ©_2_by_2); |
| |
| // (3) Store number of actual arguments and padding. The padding might be |
| // unnecessary, in which case it will be overwritten by the receiver. |
| __ RecordComment("-- Store number of args and padding --"); |
| __ SmiTag(scratch1, argc_actual); |
| __ Stp(xzr, scratch1, MemOperand(fp, -4 * kPointerSize)); |
| |
| // (4) Store receiver. Calculate target address from jssp to avoid checking |
| // for padding. Storing the receiver will overwrite either the extra slot |
| // we copied with the actual arguments, if we did copy one, or the padding we |
| // stored above. |
| __ RecordComment("-- Store receiver --"); |
| __ Add(copy_from, fp, 2 * kPointerSize); |
| __ Ldr(scratch1, MemOperand(copy_from, argc_actual, LSL, kPointerSizeLog2)); |
| __ Str(scratch1, MemOperand(jssp, argc_expected, LSL, kPointerSizeLog2)); |
| |
| // Arguments have been adapted. Now call the entry point. |
| __ RecordComment("-- Call entry point --"); |
| __ Mov(argc_actual, argc_expected); |
| // x0 : expected number of arguments |
| // x1 : function (passed through to callee) |
| // x3 : new target (passed through to callee) |
| __ Ldr(code_entry, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
| __ Call(code_entry); |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| |
| // Exit frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ Ret(); |
| |
| // Call the entry point without adapting the arguments. |
| __ RecordComment("-- Call without adapting args --"); |
| __ Bind(&dont_adapt_arguments); |
| __ Ldr(code_entry, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
| __ Jump(code_entry); |
| |
| __ Bind(&stack_overflow); |
| __ RecordComment("-- Stack overflow --"); |
| { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ Unreachable(); |
| } |
| } |
| |
| void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) { |
| // Wasm code uses the csp. This builtin excepts to use the jssp. |
| // Thus, move csp to jssp when entering this builtin (called from wasm). |
| DCHECK(masm->StackPointer().is(jssp)); |
| __ Move(jssp, csp); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Save all parameter registers (see wasm-linkage.cc). They might be |
| // overwritten in the runtime call below. We don't have any callee-saved |
| // registers in wasm, so no need to store anything else. |
| const RegList gp_regs = x0.Bit() | x1.Bit() | x2.Bit() | x3.Bit() | |
| x4.Bit() | x5.Bit() | x6.Bit() | x7.Bit(); |
| const RegList fp_regs = d0.Bit() | d1.Bit() | d2.Bit() | d3.Bit() | |
| d4.Bit() | d5.Bit() | d6.Bit() | d7.Bit(); |
| __ PushXRegList(gp_regs); |
| __ PushDRegList(fp_regs); |
| |
| // Initialize cp register with kZero, CEntryStub will use it to set the |
| // current context on the isolate. |
| __ Move(cp, Smi::kZero); |
| __ CallRuntime(Runtime::kWasmCompileLazy); |
| // Store returned instruction start in x8. |
| __ Add(x8, x0, Code::kHeaderSize - kHeapObjectTag); |
| |
| // Restore registers. |
| __ PopDRegList(fp_regs); |
| __ PopXRegList(gp_regs); |
| } |
| // Move back to csp land. jssp now has the same value as when entering this |
| // function, but csp might have changed in the runtime call. |
| __ Move(csp, jssp); |
| // Now jump to the instructions of the returned code object. |
| __ Jump(x8); |
| } |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_ARM |
