| // Copyright 2012 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_MIPS |
| |
| #include "src/api-arguments-inl.h" |
| #include "src/base/bits.h" |
| #include "src/bootstrapper.h" |
| #include "src/code-stubs.h" |
| #include "src/frame-constants.h" |
| #include "src/frames.h" |
| #include "src/ic/ic.h" |
| #include "src/ic/stub-cache.h" |
| #include "src/isolate.h" |
| #include "src/macro-assembler.h" |
| #include "src/objects/api-callbacks.h" |
| #include "src/regexp/jsregexp.h" |
| #include "src/regexp/regexp-macro-assembler.h" |
| #include "src/runtime/runtime.h" |
| |
| #include "src/mips/code-stubs-mips.h" // Cannot be the first include. |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| void JSEntryStub::Generate(MacroAssembler* masm) { |
| Label invoke, handler_entry, exit; |
| Isolate* isolate = masm->isolate(); |
| |
| { |
| NoRootArrayScope no_root_array(masm); |
| |
| // Registers: |
| // a0: entry address |
| // a1: function |
| // a2: receiver |
| // a3: argc |
| // |
| // Stack: |
| // 4 args slots |
| // args |
| |
| // Save callee saved registers on the stack. |
| __ MultiPush(kCalleeSaved | ra.bit()); |
| |
| // Save callee-saved FPU registers. |
| __ MultiPushFPU(kCalleeSavedFPU); |
| // Set up the reserved register for 0.0. |
| __ Move(kDoubleRegZero, 0.0); |
| |
| __ InitializeRootRegister(); |
| } |
| |
| // Load argv in s0 register. |
| int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize; |
| offset_to_argv += kNumCalleeSavedFPU * kDoubleSize; |
| |
| __ lw(s0, MemOperand(sp, offset_to_argv + kCArgsSlotsSize)); |
| |
| // We build an EntryFrame. |
| __ li(t3, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
| StackFrame::Type marker = type(); |
| __ li(t2, Operand(StackFrame::TypeToMarker(marker))); |
| __ li(t1, Operand(StackFrame::TypeToMarker(marker))); |
| __ li(t0, |
| ExternalReference::Create(IsolateAddressId::kCEntryFPAddress, isolate)); |
| __ lw(t0, MemOperand(t0)); |
| __ Push(t3, t2, t1, t0); |
| // Set up frame pointer for the frame to be pushed. |
| __ addiu(fp, sp, -EntryFrameConstants::kCallerFPOffset); |
| |
| // Registers: |
| // a0: entry_address |
| // a1: function |
| // a2: receiver_pointer |
| // a3: argc |
| // s0: argv |
| // |
| // Stack: |
| // caller fp | |
| // function slot | entry frame |
| // context slot | |
| // bad fp (0xFF...F) | |
| // callee saved registers + ra |
| // 4 args slots |
| // args |
| |
| // If this is the outermost JS call, set js_entry_sp value. |
| Label non_outermost_js; |
| ExternalReference js_entry_sp = |
| ExternalReference::Create(IsolateAddressId::kJSEntrySPAddress, isolate); |
| __ li(t1, js_entry_sp); |
| __ lw(t2, MemOperand(t1)); |
| __ Branch(&non_outermost_js, ne, t2, Operand(zero_reg)); |
| __ sw(fp, MemOperand(t1)); |
| __ li(t0, Operand(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| Label cont; |
| __ b(&cont); |
| __ nop(); // Branch delay slot nop. |
| __ bind(&non_outermost_js); |
| __ li(t0, Operand(StackFrame::INNER_JSENTRY_FRAME)); |
| __ bind(&cont); |
| __ push(t0); |
| |
| // Jump to a faked try block that does the invoke, with a faked catch |
| // block that sets the pending exception. |
| __ jmp(&invoke); |
| __ bind(&handler_entry); |
| handler_offset_ = handler_entry.pos(); |
| // Caught exception: Store result (exception) in the pending exception |
| // field in the JSEnv and return a failure sentinel. Coming in here the |
| // fp will be invalid because the PushStackHandler below sets it to 0 to |
| // signal the existence of the JSEntry frame. |
| __ li(t0, ExternalReference::Create( |
| IsolateAddressId::kPendingExceptionAddress, isolate)); |
| __ sw(v0, MemOperand(t0)); // We come back from 'invoke'. result is in v0. |
| __ LoadRoot(v0, RootIndex::kException); |
| __ b(&exit); // b exposes branch delay slot. |
| __ nop(); // Branch delay slot nop. |
| |
| // Invoke: Link this frame into the handler chain. |
| __ bind(&invoke); |
| __ PushStackHandler(); |
| // If an exception not caught by another handler occurs, this handler |
| // returns control to the code after the bal(&invoke) above, which |
| // restores all kCalleeSaved registers (including cp and fp) to their |
| // saved values before returning a failure to C. |
| |
| // Invoke the function by calling through JS entry trampoline builtin. |
| // Notice that we cannot store a reference to the trampoline code directly in |
| // this stub, because runtime stubs are not traversed when doing GC. |
| |
| // Registers: |
| // a0: entry_address |
| // a1: function |
| // a2: receiver_pointer |
| // a3: argc |
| // s0: argv |
| // |
| // Stack: |
| // handler frame |
| // entry frame |
| // callee saved registers + ra |
| // 4 args slots |
| // args |
| __ Call(EntryTrampoline(), RelocInfo::CODE_TARGET); |
| |
| // Unlink this frame from the handler chain. |
| __ PopStackHandler(); |
| |
| __ bind(&exit); // v0 holds result |
| // Check if the current stack frame is marked as the outermost JS frame. |
| Label non_outermost_js_2; |
| __ pop(t1); |
| __ Branch(&non_outermost_js_2, ne, t1, |
| Operand(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| __ li(t1, ExternalReference(js_entry_sp)); |
| __ sw(zero_reg, MemOperand(t1)); |
| __ bind(&non_outermost_js_2); |
| |
| // Restore the top frame descriptors from the stack. |
| __ pop(t1); |
| __ li(t0, |
| ExternalReference::Create(IsolateAddressId::kCEntryFPAddress, isolate)); |
| __ sw(t1, MemOperand(t0)); |
| |
| // Reset the stack to the callee saved registers. |
| __ addiu(sp, sp, -EntryFrameConstants::kCallerFPOffset); |
| |
| // Restore callee-saved fpu registers. |
| __ MultiPopFPU(kCalleeSavedFPU); |
| |
| // Restore callee saved registers from the stack. |
| __ MultiPop(kCalleeSaved | ra.bit()); |
| // Return. |
| __ Jump(ra); |
| } |
| |
| void DirectCEntryStub::Generate(MacroAssembler* masm) { |
| // Make place for arguments to fit C calling convention. Most of the callers |
| // of DirectCEntryStub::GenerateCall are using EnterExitFrame/LeaveExitFrame |
| // so they handle stack restoring and we don't have to do that here. |
| // Any caller of DirectCEntryStub::GenerateCall must take care of dropping |
| // kCArgsSlotsSize stack space after the call. |
| __ Subu(sp, sp, Operand(kCArgsSlotsSize)); |
| // Place the return address on the stack, making the call |
| // GC safe. The RegExp backend also relies on this. |
| __ sw(ra, MemOperand(sp, kCArgsSlotsSize)); |
| __ Call(t9); // Call the C++ function. |
| __ lw(t9, MemOperand(sp, kCArgsSlotsSize)); |
| |
| if (FLAG_debug_code && FLAG_enable_slow_asserts) { |
| // In case of an error the return address may point to a memory area |
| // filled with kZapValue by the GC. |
| // Dereference the address and check for this. |
| __ lw(t0, MemOperand(t9)); |
| __ Assert(ne, AbortReason::kReceivedInvalidReturnAddress, t0, |
| Operand(reinterpret_cast<uint32_t>(kZapValue))); |
| } |
| __ Jump(t9); |
| } |
| |
| |
| void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
| Register target) { |
| if (FLAG_embedded_builtins) { |
| if (masm->root_array_available() && |
| isolate()->ShouldLoadConstantsFromRootList()) { |
| // This is basically an inlined version of Call(Handle<Code>) that loads |
| // the code object into kScratchReg instead of t9. |
| __ Move(t9, target); |
| __ IndirectLoadConstant(kScratchReg, GetCode()); |
| __ Call(kScratchReg, Code::kHeaderSize - kHeapObjectTag); |
| return; |
| } |
| } |
| intptr_t loc = |
| reinterpret_cast<intptr_t>(GetCode().location()); |
| __ Move(t9, target); |
| __ li(kScratchReg, Operand(loc, RelocInfo::CODE_TARGET), CONSTANT_SIZE); |
| __ Call(kScratchReg); |
| } |
| |
| static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| return ref0.address() - ref1.address(); |
| } |
| |
| |
| // Calls an API function. Allocates HandleScope, extracts returned value |
| // from handle and propagates exceptions. Restores context. stack_space |
| // - space to be unwound on exit (includes the call JS arguments space and |
| // the additional space allocated for the fast call). |
| static void CallApiFunctionAndReturn(MacroAssembler* masm, |
| Register function_address, |
| ExternalReference thunk_ref, |
| int stack_space, |
| int32_t stack_space_offset, |
| MemOperand return_value_operand) { |
| Isolate* isolate = masm->isolate(); |
| ExternalReference next_address = |
| ExternalReference::handle_scope_next_address(isolate); |
| const int kNextOffset = 0; |
| const int kLimitOffset = AddressOffset( |
| ExternalReference::handle_scope_limit_address(isolate), next_address); |
| const int kLevelOffset = AddressOffset( |
| ExternalReference::handle_scope_level_address(isolate), next_address); |
| |
| DCHECK(function_address == a1 || function_address == a2); |
| |
| Label profiler_disabled; |
| Label end_profiler_check; |
| __ li(t9, ExternalReference::is_profiling_address(isolate)); |
| __ lb(t9, MemOperand(t9, 0)); |
| __ Branch(&profiler_disabled, eq, t9, Operand(zero_reg)); |
| |
| // Additional parameter is the address of the actual callback. |
| __ li(t9, thunk_ref); |
| __ jmp(&end_profiler_check); |
| |
| __ bind(&profiler_disabled); |
| __ mov(t9, function_address); |
| __ bind(&end_profiler_check); |
| |
| // Allocate HandleScope in callee-save registers. |
| __ li(s5, next_address); |
| __ lw(s0, MemOperand(s5, kNextOffset)); |
| __ lw(s1, MemOperand(s5, kLimitOffset)); |
| __ lw(s2, MemOperand(s5, kLevelOffset)); |
| __ Addu(s2, s2, Operand(1)); |
| __ sw(s2, MemOperand(s5, kLevelOffset)); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ PrepareCallCFunction(1, a0); |
| __ li(a0, ExternalReference::isolate_address(isolate)); |
| __ CallCFunction(ExternalReference::log_enter_external_function(), 1); |
| __ PopSafepointRegisters(); |
| } |
| |
| // Native call returns to the DirectCEntry stub which redirects to the |
| // return address pushed on stack (could have moved after GC). |
| // DirectCEntry stub itself is generated early and never moves. |
| DirectCEntryStub stub(isolate); |
| stub.GenerateCall(masm, t9); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ PrepareCallCFunction(1, a0); |
| __ li(a0, ExternalReference::isolate_address(isolate)); |
| __ CallCFunction(ExternalReference::log_leave_external_function(), 1); |
| __ PopSafepointRegisters(); |
| } |
| |
| Label promote_scheduled_exception; |
| Label delete_allocated_handles; |
| Label leave_exit_frame; |
| Label return_value_loaded; |
| |
| // Load value from ReturnValue. |
| __ lw(v0, return_value_operand); |
| __ bind(&return_value_loaded); |
| |
| // No more valid handles (the result handle was the last one). Restore |
| // previous handle scope. |
| __ sw(s0, MemOperand(s5, kNextOffset)); |
| if (__ emit_debug_code()) { |
| __ lw(a1, MemOperand(s5, kLevelOffset)); |
| __ Check(eq, AbortReason::kUnexpectedLevelAfterReturnFromApiCall, a1, |
| Operand(s2)); |
| } |
| __ Subu(s2, s2, Operand(1)); |
| __ sw(s2, MemOperand(s5, kLevelOffset)); |
| __ lw(kScratchReg, MemOperand(s5, kLimitOffset)); |
| __ Branch(&delete_allocated_handles, ne, s1, Operand(kScratchReg)); |
| |
| // Leave the API exit frame. |
| __ bind(&leave_exit_frame); |
| |
| if (stack_space_offset != kInvalidStackOffset) { |
| // ExitFrame contains four MIPS argument slots after DirectCEntryStub call |
| // so this must be accounted for. |
| __ lw(s0, MemOperand(sp, stack_space_offset + kCArgsSlotsSize)); |
| } else { |
| __ li(s0, Operand(stack_space)); |
| } |
| __ LeaveExitFrame(false, s0, NO_EMIT_RETURN, |
| stack_space_offset != kInvalidStackOffset); |
| |
| // Check if the function scheduled an exception. |
| __ LoadRoot(t0, RootIndex::kTheHoleValue); |
| __ li(kScratchReg, ExternalReference::scheduled_exception_address(isolate)); |
| __ lw(t1, MemOperand(kScratchReg)); |
| __ Branch(&promote_scheduled_exception, ne, t0, Operand(t1)); |
| |
| __ Ret(); |
| |
| // Re-throw by promoting a scheduled exception. |
| __ bind(&promote_scheduled_exception); |
| __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| |
| // HandleScope limit has changed. Delete allocated extensions. |
| __ bind(&delete_allocated_handles); |
| __ sw(s1, MemOperand(s5, kLimitOffset)); |
| __ mov(s0, v0); |
| __ mov(a0, v0); |
| __ PrepareCallCFunction(1, s1); |
| __ li(a0, ExternalReference::isolate_address(isolate)); |
| __ CallCFunction(ExternalReference::delete_handle_scope_extensions(), 1); |
| __ mov(v0, s0); |
| __ jmp(&leave_exit_frame); |
| } |
| |
| void CallApiCallbackStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- t0 : call_data |
| // -- a2 : holder |
| // -- a1 : api_function_address |
| // -- cp : context |
| // -- |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[(argc - 1)* 4] : first argument |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| Register call_data = t0; |
| Register holder = a2; |
| Register api_function_address = a1; |
| |
| typedef FunctionCallbackArguments FCA; |
| |
| STATIC_ASSERT(FCA::kArgsLength == 6); |
| STATIC_ASSERT(FCA::kNewTargetIndex == 5); |
| STATIC_ASSERT(FCA::kDataIndex == 4); |
| STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| STATIC_ASSERT(FCA::kHolderIndex == 0); |
| |
| // new target |
| __ PushRoot(RootIndex::kUndefinedValue); |
| |
| // call data. |
| __ Push(call_data); |
| |
| Register scratch = call_data; |
| __ LoadRoot(scratch, RootIndex::kUndefinedValue); |
| // Push return value and default return value. |
| __ Push(scratch, scratch); |
| __ li(scratch, ExternalReference::isolate_address(masm->isolate())); |
| // Push isolate and holder. |
| __ Push(scratch, holder); |
| |
| // Prepare arguments. |
| __ mov(scratch, sp); |
| |
| // Allocate the v8::Arguments structure in the arguments' space since |
| // it's not controlled by GC. |
| const int kApiStackSpace = 3; |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, kApiStackSpace); |
| |
| DCHECK(api_function_address != a0 && scratch != a0); |
| // a0 = FunctionCallbackInfo& |
| // Arguments is after the return address. |
| __ Addu(a0, sp, Operand(1 * kPointerSize)); |
| // FunctionCallbackInfo::implicit_args_ |
| __ sw(scratch, MemOperand(a0, 0 * kPointerSize)); |
| // FunctionCallbackInfo::values_ |
| __ Addu(kScratchReg, scratch, |
| Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize)); |
| __ sw(kScratchReg, MemOperand(a0, 1 * kPointerSize)); |
| // FunctionCallbackInfo::length_ = argc |
| __ li(kScratchReg, Operand(argc())); |
| __ sw(kScratchReg, MemOperand(a0, 2 * kPointerSize)); |
| |
| ExternalReference thunk_ref = ExternalReference::invoke_function_callback(); |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| // Stores return the first js argument. |
| int return_value_offset = 2 + FCA::kReturnValueOffset; |
| MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
| const int stack_space = argc() + FCA::kArgsLength + 1; |
| // TODO(adamk): Why are we clobbering this immediately? |
| const int32_t stack_space_offset = kInvalidStackOffset; |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| stack_space_offset, return_value_operand); |
| } |
| |
| |
| void CallApiGetterStub::Generate(MacroAssembler* masm) { |
| // Build v8::PropertyCallbackInfo::args_ array on the stack and push property |
| // name below the exit frame to make GC aware of them. |
| STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0); |
| STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1); |
| STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2); |
| STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3); |
| STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4); |
| STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5); |
| STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6); |
| STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7); |
| |
| Register receiver = ApiGetterDescriptor::ReceiverRegister(); |
| Register holder = ApiGetterDescriptor::HolderRegister(); |
| Register callback = ApiGetterDescriptor::CallbackRegister(); |
| Register scratch = t0; |
| DCHECK(!AreAliased(receiver, holder, callback, scratch)); |
| |
| Register api_function_address = a2; |
| |
| // Here and below +1 is for name() pushed after the args_ array. |
| typedef PropertyCallbackArguments PCA; |
| __ Subu(sp, sp, (PCA::kArgsLength + 1) * kPointerSize); |
| __ sw(receiver, MemOperand(sp, (PCA::kThisIndex + 1) * kPointerSize)); |
| __ lw(scratch, FieldMemOperand(callback, AccessorInfo::kDataOffset)); |
| __ sw(scratch, MemOperand(sp, (PCA::kDataIndex + 1) * kPointerSize)); |
| __ LoadRoot(scratch, RootIndex::kUndefinedValue); |
| __ sw(scratch, MemOperand(sp, (PCA::kReturnValueOffset + 1) * kPointerSize)); |
| __ sw(scratch, MemOperand(sp, (PCA::kReturnValueDefaultValueIndex + 1) * |
| kPointerSize)); |
| __ li(scratch, ExternalReference::isolate_address(isolate())); |
| __ sw(scratch, MemOperand(sp, (PCA::kIsolateIndex + 1) * kPointerSize)); |
| __ sw(holder, MemOperand(sp, (PCA::kHolderIndex + 1) * kPointerSize)); |
| // should_throw_on_error -> false |
| DCHECK_NULL(Smi::kZero); |
| __ sw(zero_reg, |
| MemOperand(sp, (PCA::kShouldThrowOnErrorIndex + 1) * kPointerSize)); |
| __ lw(scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset)); |
| __ sw(scratch, MemOperand(sp, 0 * kPointerSize)); |
| |
| // v8::PropertyCallbackInfo::args_ array and name handle. |
| const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| |
| // Load address of v8::PropertyAccessorInfo::args_ array and name handle. |
| __ mov(a0, sp); // a0 = Handle<Name> |
| __ Addu(a1, a0, Operand(1 * kPointerSize)); // a1 = v8::PCI::args_ |
| |
| const int kApiStackSpace = 1; |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, kApiStackSpace); |
| |
| // Create v8::PropertyCallbackInfo object on the stack and initialize |
| // it's args_ field. |
| __ sw(a1, MemOperand(sp, 1 * kPointerSize)); |
| __ Addu(a1, sp, Operand(1 * kPointerSize)); // a1 = v8::PropertyCallbackInfo& |
| |
| ExternalReference thunk_ref = |
| ExternalReference::invoke_accessor_getter_callback(); |
| |
| __ lw(scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset)); |
| __ lw(api_function_address, |
| FieldMemOperand(scratch, Foreign::kForeignAddressOffset)); |
| |
| // +3 is to skip prolog, return address and name handle. |
| MemOperand return_value_operand( |
| fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize); |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
| kStackUnwindSpace, kInvalidStackOffset, |
| return_value_operand); |
| } |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_MIPS |