| // Copyright 2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "bootstrapper.h" |
| #include "codegen-inl.h" |
| #include "assembler-x64.h" |
| #include "macro-assembler-x64.h" |
| #include "debug.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| MacroAssembler::MacroAssembler(void* buffer, int size) |
| : Assembler(buffer, size), |
| unresolved_(0), |
| generating_stub_(false), |
| allow_stub_calls_(true), |
| code_object_(Heap::undefined_value()) { |
| } |
| |
| |
| // TODO(x64): For now, the write barrier is disabled on x64 and we |
| // therefore generate no code. This should be fixed when the write |
| // barrier is enabled. |
| void MacroAssembler::RecordWrite(Register object, int offset, |
| Register value, Register scratch) { |
| } |
| |
| |
| void MacroAssembler::Assert(Condition cc, const char* msg) { |
| if (FLAG_debug_code) Check(cc, msg); |
| } |
| |
| |
| void MacroAssembler::Check(Condition cc, const char* msg) { |
| Label L; |
| j(cc, &L); |
| Abort(msg); |
| // will not return here |
| bind(&L); |
| } |
| |
| |
| void MacroAssembler::NegativeZeroTest(Register result, |
| Register op, |
| Label* then_label) { |
| Label ok; |
| testq(result, result); |
| j(not_zero, &ok); |
| testq(op, op); |
| j(sign, then_label); |
| bind(&ok); |
| } |
| |
| |
| void MacroAssembler::Abort(const char* msg) { |
| // We want to pass the msg string like a smi to avoid GC |
| // problems, however msg is not guaranteed to be aligned |
| // properly. Instead, we pass an aligned pointer that is |
| // a proper v8 smi, but also pass the alignment difference |
| // from the real pointer as a smi. |
| intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| #ifdef DEBUG |
| if (msg != NULL) { |
| RecordComment("Abort message: "); |
| RecordComment(msg); |
| } |
| #endif |
| push(rax); |
| movq(kScratchRegister, p0, RelocInfo::NONE); |
| push(kScratchRegister); |
| movq(kScratchRegister, |
| reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0)), |
| RelocInfo::NONE); |
| push(kScratchRegister); |
| CallRuntime(Runtime::kAbort, 2); |
| // will not return here |
| } |
| |
| |
| void MacroAssembler::CallStub(CodeStub* stub) { |
| ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
| movq(kScratchRegister, stub->GetCode(), RelocInfo::CODE_TARGET); |
| call(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::StubReturn(int argc) { |
| ASSERT(argc >= 1 && generating_stub()); |
| ret((argc - 1) * kPointerSize); |
| } |
| |
| |
| void MacroAssembler::IllegalOperation(int num_arguments) { |
| if (num_arguments > 0) { |
| addq(rsp, Immediate(num_arguments * kPointerSize)); |
| } |
| movq(rax, Factory::undefined_value(), RelocInfo::EMBEDDED_OBJECT); |
| } |
| |
| |
| void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| } |
| |
| |
| void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| // If the expected number of arguments of the runtime function is |
| // constant, we check that the actual number of arguments match the |
| // expectation. |
| if (f->nargs >= 0 && f->nargs != num_arguments) { |
| IllegalOperation(num_arguments); |
| return; |
| } |
| |
| Runtime::FunctionId function_id = |
| static_cast<Runtime::FunctionId>(f->stub_id); |
| RuntimeStub stub(function_id, num_arguments); |
| CallStub(&stub); |
| } |
| |
| |
| void MacroAssembler::TailCallRuntime(ExternalReference const& ext, |
| int num_arguments) { |
| // TODO(1236192): Most runtime routines don't need the number of |
| // arguments passed in because it is constant. At some point we |
| // should remove this need and make the runtime routine entry code |
| // smarter. |
| movq(rax, Immediate(num_arguments)); |
| JumpToBuiltin(ext); |
| } |
| |
| |
| void MacroAssembler::JumpToBuiltin(const ExternalReference& ext) { |
| // Set the entry point and jump to the C entry runtime stub. |
| movq(rbx, ext); |
| CEntryStub ces; |
| movq(kScratchRegister, ces.GetCode(), RelocInfo::CODE_TARGET); |
| jmp(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| bool resolved; |
| Handle<Code> code = ResolveBuiltin(id, &resolved); |
| |
| const char* name = Builtins::GetName(id); |
| int argc = Builtins::GetArgumentsCount(id); |
| |
| movq(target, code, RelocInfo::EXTERNAL_REFERENCE); // Is external reference? |
| if (!resolved) { |
| uint32_t flags = |
| Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
| Bootstrapper::FixupFlagsIsPCRelative::encode(false) | |
| Bootstrapper::FixupFlagsUseCodeObject::encode(true); |
| Unresolved entry = { pc_offset() - sizeof(intptr_t), flags, name }; |
| unresolved_.Add(entry); |
| } |
| addq(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| |
| Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id, |
| bool* resolved) { |
| // Move the builtin function into the temporary function slot by |
| // reading it from the builtins object. NOTE: We should be able to |
| // reduce this to two instructions by putting the function table in |
| // the global object instead of the "builtins" object and by using a |
| // real register for the function. |
| movq(rdx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| movq(rdx, FieldOperand(rdx, GlobalObject::kBuiltinsOffset)); |
| int builtins_offset = |
| JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize); |
| movq(rdi, FieldOperand(rdx, builtins_offset)); |
| |
| |
| return Builtins::GetCode(id, resolved); |
| } |
| |
| |
| void MacroAssembler::Set(Register dst, int64_t x) { |
| if (is_int32(x)) { |
| movq(dst, Immediate(x)); |
| } else if (is_uint32(x)) { |
| movl(dst, Immediate(x)); |
| } else { |
| movq(dst, x, RelocInfo::NONE); |
| } |
| } |
| |
| |
| void MacroAssembler::Set(const Operand& dst, int64_t x) { |
| if (is_int32(x)) { |
| movq(kScratchRegister, Immediate(x)); |
| } else if (is_uint32(x)) { |
| movl(kScratchRegister, Immediate(x)); |
| } else { |
| movq(kScratchRegister, x, RelocInfo::NONE); |
| } |
| movq(dst, kScratchRegister); |
| } |
| |
| |
| bool MacroAssembler::IsUnsafeSmi(Smi* value) { |
| return false; |
| } |
| |
| void MacroAssembler::LoadUnsafeSmi(Register dst, Smi* source) { |
| UNIMPLEMENTED(); |
| } |
| |
| |
| void MacroAssembler::Move(Register dst, Handle<Object> source) { |
| if (source->IsSmi()) { |
| if (IsUnsafeSmi(source)) { |
| LoadUnsafeSmi(dst, source); |
| } else { |
| movq(dst, source, RelocInfo::NONE); |
| } |
| } else { |
| movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| } |
| } |
| |
| |
| void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
| Move(kScratchRegister, source); |
| movq(dst, kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
| Move(kScratchRegister, source); |
| cmpq(dst, kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
| Move(kScratchRegister, source); |
| cmpq(dst, kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Push(Handle<Object> source) { |
| Move(kScratchRegister, source); |
| push(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Jump(ExternalReference ext) { |
| movq(kScratchRegister, ext); |
| jmp(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| movq(kScratchRegister, destination, rmode); |
| jmp(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
| WriteRecordedPositions(); |
| ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| movq(kScratchRegister, code_object, rmode); |
| #ifdef DEBUG |
| Label target; |
| bind(&target); |
| #endif |
| jmp(kScratchRegister); |
| #ifdef DEBUG |
| ASSERT_EQ(kTargetAddrToReturnAddrDist, |
| SizeOfCodeGeneratedSince(&target) + kPointerSize); |
| #endif |
| } |
| |
| |
| void MacroAssembler::Call(ExternalReference ext) { |
| movq(kScratchRegister, ext); |
| call(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| movq(kScratchRegister, destination, rmode); |
| call(kScratchRegister); |
| } |
| |
| |
| void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
| WriteRecordedPositions(); |
| ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| movq(kScratchRegister, code_object, rmode); |
| #ifdef DEBUG |
| Label target; |
| bind(&target); |
| #endif |
| call(kScratchRegister); |
| #ifdef DEBUG |
| ASSERT_EQ(kTargetAddrToReturnAddrDist, |
| SizeOfCodeGeneratedSince(&target) + kPointerSize); |
| #endif |
| } |
| |
| |
| void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| HandlerType type) { |
| // Adjust this code if not the case. |
| ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| |
| // The pc (return address) is already on TOS. This code pushes state, |
| // frame pointer and current handler. Check that they are expected |
| // next on the stack, in that order. |
| ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| StackHandlerConstants::kPCOffset - kPointerSize); |
| ASSERT_EQ(StackHandlerConstants::kFPOffset, |
| StackHandlerConstants::kStateOffset - kPointerSize); |
| ASSERT_EQ(StackHandlerConstants::kNextOffset, |
| StackHandlerConstants::kFPOffset - kPointerSize); |
| |
| if (try_location == IN_JAVASCRIPT) { |
| if (type == TRY_CATCH_HANDLER) { |
| push(Immediate(StackHandler::TRY_CATCH)); |
| } else { |
| push(Immediate(StackHandler::TRY_FINALLY)); |
| } |
| push(rbp); |
| } else { |
| ASSERT(try_location == IN_JS_ENTRY); |
| // The frame pointer does not point to a JS frame so we save NULL |
| // for rbp. We expect the code throwing an exception to check rbp |
| // before dereferencing it to restore the context. |
| push(Immediate(StackHandler::ENTRY)); |
| push(Immediate(0)); // NULL frame pointer. |
| } |
| // Save the current handler. |
| movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
| push(Operand(kScratchRegister, 0)); |
| // Link this handler. |
| movq(Operand(kScratchRegister, 0), rsp); |
| } |
| |
| |
| void MacroAssembler::Ret() { |
| ret(0); |
| } |
| |
| |
| void MacroAssembler::FCmp() { |
| fcompp(); |
| push(rax); |
| fnstsw_ax(); |
| // TODO(X64): Check that sahf is safe to use, using CPUProbe. |
| sahf(); |
| pop(rax); |
| } |
| |
| |
| void MacroAssembler::CmpObjectType(Register heap_object, |
| InstanceType type, |
| Register map) { |
| movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| CmpInstanceType(map, type); |
| } |
| |
| |
| void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| Immediate(static_cast<int8_t>(type))); |
| } |
| |
| |
| void MacroAssembler::TryGetFunctionPrototype(Register function, |
| Register result, |
| Label* miss) { |
| // Check that the receiver isn't a smi. |
| testl(function, Immediate(kSmiTagMask)); |
| j(zero, miss); |
| |
| // Check that the function really is a function. |
| CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| j(not_equal, miss); |
| |
| // Make sure that the function has an instance prototype. |
| Label non_instance; |
| testb(FieldOperand(result, Map::kBitFieldOffset), |
| Immediate(1 << Map::kHasNonInstancePrototype)); |
| j(not_zero, &non_instance); |
| |
| // Get the prototype or initial map from the function. |
| movq(result, |
| FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // If the prototype or initial map is the hole, don't return it and |
| // simply miss the cache instead. This will allow us to allocate a |
| // prototype object on-demand in the runtime system. |
| Cmp(result, Factory::the_hole_value()); |
| j(equal, miss); |
| |
| // If the function does not have an initial map, we're done. |
| Label done; |
| CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| j(not_equal, &done); |
| |
| // Get the prototype from the initial map. |
| movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| jmp(&done); |
| |
| // Non-instance prototype: Fetch prototype from constructor field |
| // in initial map. |
| bind(&non_instance); |
| movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| |
| // All done. |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| movq(kScratchRegister, ExternalReference(counter)); |
| movl(Operand(kScratchRegister, 0), Immediate(value)); |
| } |
| } |
| |
| |
| void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| ASSERT(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| movq(kScratchRegister, ExternalReference(counter)); |
| Operand operand(kScratchRegister, 0); |
| if (value == 1) { |
| incl(operand); |
| } else { |
| addl(operand, Immediate(value)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| ASSERT(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| movq(kScratchRegister, ExternalReference(counter)); |
| Operand operand(kScratchRegister, 0); |
| if (value == 1) { |
| decl(operand); |
| } else { |
| subl(operand, Immediate(value)); |
| } |
| } |
| } |
| |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| |
| void MacroAssembler::PushRegistersFromMemory(RegList regs) { |
| ASSERT((regs & ~kJSCallerSaved) == 0); |
| // Push the content of the memory location to the stack. |
| for (int i = 0; i < kNumJSCallerSaved; i++) { |
| int r = JSCallerSavedCode(i); |
| if ((regs & (1 << r)) != 0) { |
| ExternalReference reg_addr = |
| ExternalReference(Debug_Address::Register(i)); |
| movq(kScratchRegister, reg_addr); |
| push(Operand(kScratchRegister, 0)); |
| } |
| } |
| } |
| |
| void MacroAssembler::SaveRegistersToMemory(RegList regs) { |
| ASSERT((regs & ~kJSCallerSaved) == 0); |
| // Copy the content of registers to memory location. |
| for (int i = 0; i < kNumJSCallerSaved; i++) { |
| int r = JSCallerSavedCode(i); |
| if ((regs & (1 << r)) != 0) { |
| Register reg = { r }; |
| ExternalReference reg_addr = |
| ExternalReference(Debug_Address::Register(i)); |
| movq(kScratchRegister, reg_addr); |
| movq(Operand(kScratchRegister, 0), reg); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::RestoreRegistersFromMemory(RegList regs) { |
| ASSERT((regs & ~kJSCallerSaved) == 0); |
| // Copy the content of memory location to registers. |
| for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| int r = JSCallerSavedCode(i); |
| if ((regs & (1 << r)) != 0) { |
| Register reg = { r }; |
| ExternalReference reg_addr = |
| ExternalReference(Debug_Address::Register(i)); |
| movq(kScratchRegister, reg_addr); |
| movq(reg, Operand(kScratchRegister, 0)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::PopRegistersToMemory(RegList regs) { |
| ASSERT((regs & ~kJSCallerSaved) == 0); |
| // Pop the content from the stack to the memory location. |
| for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| int r = JSCallerSavedCode(i); |
| if ((regs & (1 << r)) != 0) { |
| ExternalReference reg_addr = |
| ExternalReference(Debug_Address::Register(i)); |
| movq(kScratchRegister, reg_addr); |
| pop(Operand(kScratchRegister, 0)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::CopyRegistersFromStackToMemory(Register base, |
| Register scratch, |
| RegList regs) { |
| ASSERT(!scratch.is(kScratchRegister)); |
| ASSERT(!base.is(kScratchRegister)); |
| ASSERT(!base.is(scratch)); |
| ASSERT((regs & ~kJSCallerSaved) == 0); |
| // Copy the content of the stack to the memory location and adjust base. |
| for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| int r = JSCallerSavedCode(i); |
| if ((regs & (1 << r)) != 0) { |
| movq(scratch, Operand(base, 0)); |
| ExternalReference reg_addr = |
| ExternalReference(Debug_Address::Register(i)); |
| movq(kScratchRegister, reg_addr); |
| movq(Operand(kScratchRegister, 0), scratch); |
| lea(base, Operand(base, kPointerSize)); |
| } |
| } |
| } |
| |
| #endif // ENABLE_DEBUGGER_SUPPORT |
| |
| |
| void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| bool resolved; |
| Handle<Code> code = ResolveBuiltin(id, &resolved); |
| |
| // Calls are not allowed in some stubs. |
| ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
| |
| // Rely on the assertion to check that the number of provided |
| // arguments match the expected number of arguments. Fake a |
| // parameter count to avoid emitting code to do the check. |
| ParameterCount expected(0); |
| InvokeCode(Handle<Code>(code), expected, expected, |
| RelocInfo::CODE_TARGET, flag); |
| |
| const char* name = Builtins::GetName(id); |
| int argc = Builtins::GetArgumentsCount(id); |
| // The target address for the jump is stored as an immediate at offset |
| // kInvokeCodeAddressOffset. |
| if (!resolved) { |
| uint32_t flags = |
| Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
| Bootstrapper::FixupFlagsIsPCRelative::encode(true) | |
| Bootstrapper::FixupFlagsUseCodeObject::encode(false); |
| Unresolved entry = |
| { pc_offset() - kTargetAddrToReturnAddrDist, flags, name }; |
| unresolved_.Add(entry); |
| } |
| } |
| |
| |
| void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| const ParameterCount& actual, |
| Handle<Code> code_constant, |
| Register code_register, |
| Label* done, |
| InvokeFlag flag) { |
| bool definitely_matches = false; |
| Label invoke; |
| if (expected.is_immediate()) { |
| ASSERT(actual.is_immediate()); |
| if (expected.immediate() == actual.immediate()) { |
| definitely_matches = true; |
| } else { |
| movq(rax, Immediate(actual.immediate())); |
| if (expected.immediate() == |
| SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| // Don't worry about adapting arguments for built-ins that |
| // don't want that done. Skip adaption code by making it look |
| // like we have a match between expected and actual number of |
| // arguments. |
| definitely_matches = true; |
| } else { |
| movq(rbx, Immediate(expected.immediate())); |
| } |
| } |
| } else { |
| if (actual.is_immediate()) { |
| // Expected is in register, actual is immediate. This is the |
| // case when we invoke function values without going through the |
| // IC mechanism. |
| cmpq(expected.reg(), Immediate(actual.immediate())); |
| j(equal, &invoke); |
| ASSERT(expected.reg().is(rbx)); |
| movq(rax, Immediate(actual.immediate())); |
| } else if (!expected.reg().is(actual.reg())) { |
| // Both expected and actual are in (different) registers. This |
| // is the case when we invoke functions using call and apply. |
| cmpq(expected.reg(), actual.reg()); |
| j(equal, &invoke); |
| ASSERT(actual.reg().is(rax)); |
| ASSERT(expected.reg().is(rbx)); |
| } |
| } |
| |
| if (!definitely_matches) { |
| Handle<Code> adaptor = |
| Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| if (!code_constant.is_null()) { |
| movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| } else if (!code_register.is(rdx)) { |
| movq(rdx, code_register); |
| } |
| |
| movq(kScratchRegister, adaptor, RelocInfo::CODE_TARGET); |
| if (flag == CALL_FUNCTION) { |
| call(kScratchRegister); |
| jmp(done); |
| } else { |
| jmp(kScratchRegister); |
| } |
| bind(&invoke); |
| } |
| } |
| |
| |
| void MacroAssembler::InvokeCode(Register code, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| InvokeFlag flag) { |
| Label done; |
| InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| if (flag == CALL_FUNCTION) { |
| call(code); |
| } else { |
| ASSERT(flag == JUMP_FUNCTION); |
| jmp(code); |
| } |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::InvokeCode(Handle<Code> code, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| RelocInfo::Mode rmode, |
| InvokeFlag flag) { |
| Label done; |
| Register dummy = rax; |
| InvokePrologue(expected, actual, code, dummy, &done, flag); |
| if (flag == CALL_FUNCTION) { |
| Call(code, rmode); |
| } else { |
| ASSERT(flag == JUMP_FUNCTION); |
| Jump(code, rmode); |
| } |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Register function, |
| const ParameterCount& actual, |
| InvokeFlag flag) { |
| ASSERT(function.is(rdi)); |
| movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
| movsxlq(rbx, |
| FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
| movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
| // Advances rdx to the end of the Code object header, to the start of |
| // the executable code. |
| lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| |
| ParameterCount expected(rbx); |
| InvokeCode(rdx, expected, actual, flag); |
| } |
| |
| |
| void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| push(rbp); |
| movq(rbp, rsp); |
| push(rsi); // Context. |
| push(Immediate(Smi::FromInt(type))); |
| movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| push(kScratchRegister); |
| if (FLAG_debug_code) { |
| movq(kScratchRegister, |
| Factory::undefined_value(), |
| RelocInfo::EMBEDDED_OBJECT); |
| cmpq(Operand(rsp, 0), kScratchRegister); |
| Check(not_equal, "code object not properly patched"); |
| } |
| } |
| |
| |
| void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| if (FLAG_debug_code) { |
| movq(kScratchRegister, Immediate(Smi::FromInt(type))); |
| cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| Check(equal, "stack frame types must match"); |
| } |
| movq(rsp, rbp); |
| pop(rbp); |
| } |
| |
| |
| |
| void MacroAssembler::EnterExitFrame(StackFrame::Type type) { |
| ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG); |
| |
| // Setup the frame structure on the stack. |
| // All constants are relative to the frame pointer of the exit frame. |
| ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| push(rbp); |
| movq(rbp, rsp); |
| |
| // Reserve room for entry stack pointer and push the debug marker. |
| ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
| push(Immediate(0)); // saved entry sp, patched before call |
| push(Immediate(type == StackFrame::EXIT_DEBUG ? 1 : 0)); |
| |
| // Save the frame pointer and the context in top. |
| ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| ExternalReference context_address(Top::k_context_address); |
| movq(r14, rax); // Backup rax before we use it. |
| |
| movq(rax, rbp); |
| store_rax(c_entry_fp_address); |
| movq(rax, rsi); |
| store_rax(context_address); |
| |
| // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
| // so it must be retained across the C-call. |
| int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // Save the state of all registers to the stack from the memory |
| // location. This is needed to allow nested break points. |
| if (type == StackFrame::EXIT_DEBUG) { |
| // TODO(1243899): This should be symmetric to |
| // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
| // correct here, but computed for the other call. Very error |
| // prone! FIX THIS. Actually there are deeper problems with |
| // register saving than this asymmetry (see the bug report |
| // associated with this issue). |
| PushRegistersFromMemory(kJSCallerSaved); |
| } |
| #endif |
| |
| // Reserve space for two arguments: argc and argv |
| subq(rsp, Immediate(2 * kPointerSize)); |
| |
| // Get the required frame alignment for the OS. |
| static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| if (kFrameAlignment > 0) { |
| ASSERT(IsPowerOf2(kFrameAlignment)); |
| movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| and_(rsp, kScratchRegister); |
| } |
| |
| // Patch the saved entry sp. |
| movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| } |
| |
| |
| void MacroAssembler::LeaveExitFrame(StackFrame::Type type) { |
| // Registers: |
| // r15 : argv |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // Restore the memory copy of the registers by digging them out from |
| // the stack. This is needed to allow nested break points. |
| if (type == StackFrame::EXIT_DEBUG) { |
| // It's okay to clobber register ebx below because we don't need |
| // the function pointer after this. |
| const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
| int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize; |
| lea(rbx, Operand(rbp, kOffset)); |
| CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved); |
| } |
| #endif |
| |
| // Get the return address from the stack and restore the frame pointer. |
| movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| |
| // Pop the arguments and the receiver from the caller stack. |
| lea(rsp, Operand(r15, 1 * kPointerSize)); |
| |
| // Restore current context from top and clear it in debug mode. |
| ExternalReference context_address(Top::k_context_address); |
| movq(kScratchRegister, context_address); |
| movq(rsi, Operand(kScratchRegister, 0)); |
| #ifdef DEBUG |
| movq(Operand(kScratchRegister, 0), Immediate(0)); |
| #endif |
| |
| // Push the return address to get ready to return. |
| push(rcx); |
| |
| // Clear the top frame. |
| ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| movq(kScratchRegister, c_entry_fp_address); |
| movq(Operand(kScratchRegister, 0), Immediate(0)); |
| } |
| |
| |
| } } // namespace v8::internal |