regis@google.com
1b274ff2cf
assemblers. Review URL: https://codereview.chromium.org//12398029 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@19434 260f80e4-7a28-3924-810f-c04153c831b5
483 lines
16 KiB
C++
483 lines
16 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_ARM)
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#include "vm/assembler.h"
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#include "vm/code_generator.h"
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#include "vm/dart_entry.h"
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#include "vm/instructions.h"
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#include "vm/stack_frame.h"
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#include "vm/stub_code.h"
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#define __ assembler->
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namespace dart {
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// Input parameters:
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// LR : return address.
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// SP : address of last argument in argument array.
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// SP + 4*R4 - 4 : address of first argument in argument array.
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// SP + 4*R4 : address of return value.
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// R5 : address of the runtime function to call.
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// R4 : number of arguments to the call.
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void StubCode::GenerateCallToRuntimeStub(Assembler* assembler) {
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const intptr_t isolate_offset = NativeArguments::isolate_offset();
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const intptr_t argc_tag_offset = NativeArguments::argc_tag_offset();
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const intptr_t argv_offset = NativeArguments::argv_offset();
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const intptr_t retval_offset = NativeArguments::retval_offset();
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__ EnterFrame((1 << FP) | (1 << LR), 0);
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// Load current Isolate pointer from Context structure into R0.
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__ ldr(R0, FieldAddress(CTX, Context::isolate_offset()));
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// Save exit frame information to enable stack walking as we are about
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// to transition to Dart VM C++ code.
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_exit_frame_info_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(IP, R0, offset12_hi);
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__ str(SP, Address(IP, offset12_lo));
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}
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// Save current Context pointer into Isolate structure.
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_context_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(IP, R0, offset12_hi);
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__ str(CTX, Address(IP, offset12_lo));
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}
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// Cache Isolate pointer into CTX while executing runtime code.
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__ mov(CTX, ShifterOperand(R0));
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// Reserve space for arguments and align frame before entering C++ world.
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// NativeArguments are passed in registers.
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ASSERT(sizeof(NativeArguments) == 4 * kWordSize);
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__ ReserveAlignedFrameSpace(0);
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// Pass NativeArguments structure by value and call runtime.
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// Registers R0, R1, R2, and R3 are used.
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ASSERT(isolate_offset == 0 * kWordSize);
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__ mov(R0, ShifterOperand(CTX)); // Set isolate in NativeArgs.
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// There are no runtime calls to closures, so we do not need to set the tag
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// bits kClosureFunctionBit and kInstanceFunctionBit in argc_tag_.
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ASSERT(argc_tag_offset == 1 * kWordSize);
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__ mov(R1, ShifterOperand(R4)); // Set argc in NativeArguments.
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ASSERT(argv_offset == 2 * kWordSize);
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__ add(R2, FP, ShifterOperand(R4, LSL, 2)); // Compute argv.
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__ AddImmediate(R2, kWordSize); // Set argv in NativeArguments.
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ASSERT(retval_offset == 3 * kWordSize);
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__ add(R3, R2, ShifterOperand(kWordSize)); // Retval is next to 1st argument.
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// Call runtime or redirection via simulator.
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__ blx(R5);
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// Reset exit frame information in Isolate structure.
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__ LoadImmediate(R2, 0);
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_exit_frame_info_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(IP, CTX, offset12_hi);
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__ str(R2, Address(IP, offset12_lo));
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}
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// Load Context pointer from Isolate structure into R2.
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_context_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(IP, CTX, offset12_hi);
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__ ldr(R2, Address(IP, offset12_lo));
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}
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// Reset Context pointer in Isolate structure.
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__ LoadImmediate(R3, reinterpret_cast<intptr_t>(Object::null()));
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_context_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(IP, CTX, offset12_hi);
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__ str(R3, Address(IP, offset12_lo));
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}
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// Cache Context pointer into CTX while executing Dart code.
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__ mov(CTX, ShifterOperand(R2));
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__ LeaveFrame((1 << FP) | (1 << LR));
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__ Ret();
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}
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void StubCode::GeneratePrintStopMessageStub(Assembler* assembler) {
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__ Unimplemented("PrintStopMessage stub");
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}
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void StubCode::GenerateCallNativeCFunctionStub(Assembler* assembler) {
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__ Unimplemented("CallNativeCFunction stub");
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}
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// Input parameters:
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// R4: arguments descriptor array.
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void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
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__ EnterStubFrame();
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// Setup space on stack for return value and preserve arguments descriptor.
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__ LoadImmediate(R0, reinterpret_cast<intptr_t>(Object::null()));
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__ PushList((1 << R0) | (1 << R4));
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__ CallRuntime(kPatchStaticCallRuntimeEntry);
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// Get Code object result and restore arguments descriptor array.
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__ PopList((1 << R0) | (1 << R4));
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// Remove the stub frame as we are about to jump to the dart function.
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__ LeaveStubFrame();
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__ ldr(R0, FieldAddress(R0, Code::instructions_offset()));
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__ AddImmediate(R0, R0, Instructions::HeaderSize() - kHeapObjectTag);
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__ bx(R0);
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}
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void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
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__ Unimplemented("FixCallersTarget stub");
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}
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void StubCode::GenerateInstanceFunctionLookupStub(Assembler* assembler) {
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__ Unimplemented("InstanceFunctionLookup stub");
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}
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void StubCode::GenerateDeoptimizeLazyStub(Assembler* assembler) {
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__ Unimplemented("DeoptimizeLazy stub");
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}
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void StubCode::GenerateDeoptimizeStub(Assembler* assembler) {
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__ Unimplemented("Deoptimize stub");
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}
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void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
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__ Unimplemented("MegamorphicMiss stub");
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}
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void StubCode::GenerateAllocateArrayStub(Assembler* assembler) {
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__ Unimplemented("AllocateArray stub");
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}
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void StubCode::GenerateCallClosureFunctionStub(Assembler* assembler) {
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__ Unimplemented("CallClosureFunction stub");
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}
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// Called when invoking Dart code from C++ (VM code).
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// Input parameters:
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// LR : points to return address.
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// R0 : entrypoint of the Dart function to call.
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// R1 : arguments descriptor array.
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// R2 : arguments array.
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// R3 : new context containing the current isolate pointer.
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void StubCode::GenerateInvokeDartCodeStub(Assembler* assembler) {
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// Save frame pointer coming in.
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__ EnterStubFrame();
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// Save new context and C++ ABI callee-saved registers.
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const intptr_t kNewContextOffset =
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-(1 + kAbiPreservedCpuRegCount) * kWordSize;
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__ PushList((1 << R3) | kAbiPreservedCpuRegs);
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// The new Context structure contains a pointer to the current Isolate
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// structure. Cache the Context pointer in the CTX register so that it is
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// available in generated code and calls to Isolate::Current() need not be
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// done. The assumption is that this register will never be clobbered by
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// compiled or runtime stub code.
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// Cache the new Context pointer into CTX while executing Dart code.
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__ ldr(CTX, Address(R3, VMHandles::kOffsetOfRawPtrInHandle));
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// Load Isolate pointer from Context structure into temporary register R8.
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__ ldr(R8, FieldAddress(CTX, Context::isolate_offset()));
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// Save the top exit frame info. Use R5 as a temporary register.
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// StackFrameIterator reads the top exit frame info saved in this frame.
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{
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// TODO(regis): Add assembler macro for {Load,Store}BasedOffset with no
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// restriction on the offset.
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const intptr_t offset = Isolate::top_exit_frame_info_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(R7, R8, offset12_hi);
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__ ldr(R5, Address(R7, offset12_lo));
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__ LoadImmediate(R6, 0);
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__ str(R6, Address(R7, offset12_lo));
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}
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// Save the old Context pointer. Use R4 as a temporary register.
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// Note that VisitObjectPointers will find this saved Context pointer during
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// GC marking, since it traverses any information between SP and
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// FP - kExitLinkOffsetInEntryFrame.
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// EntryFrame::SavedContext reads the context saved in this frame.
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{
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const intptr_t offset = Isolate::top_context_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(R7, R8, offset12_hi);
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__ ldr(R4, Address(R7, offset12_lo));
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}
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// The constants kSavedContextOffsetInEntryFrame and
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// kExitLinkOffsetInEntryFrame must be kept in sync with the code below.
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__ PushList((1 << R4) | (1 << R5));
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// The stack pointer is restore after the call to this location.
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const intptr_t kSavedContextOffsetInEntryFrame = -10 * kWordSize;
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// Load arguments descriptor array into R4, which is passed to Dart code.
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__ ldr(R4, Address(R1, VMHandles::kOffsetOfRawPtrInHandle));
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// Load number of arguments into R5.
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__ ldr(R5, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
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__ SmiUntag(R5);
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// Compute address of 'arguments array' data area into R2.
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__ ldr(R2, Address(R2, VMHandles::kOffsetOfRawPtrInHandle));
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__ AddImmediate(R2, R2, Array::data_offset() - kHeapObjectTag);
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// Set up arguments for the Dart call.
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Label push_arguments;
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Label done_push_arguments;
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__ CompareImmediate(R5, 0); // check if there are arguments.
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__ b(&done_push_arguments, EQ);
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__ LoadImmediate(R1, 0);
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__ Bind(&push_arguments);
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__ ldr(R3, Address(R2));
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__ Push(R3);
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__ AddImmediate(R2, kWordSize);
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__ AddImmediate(R1, 1);
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__ cmp(R1, ShifterOperand(R5));
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__ b(&push_arguments, LT);
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__ Bind(&done_push_arguments);
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// Call the Dart code entrypoint.
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__ blx(R0); // R4 is the arguments descriptor array.
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// Read the saved new Context pointer.
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__ ldr(CTX, Address(FP, kNewContextOffset));
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__ ldr(CTX, Address(CTX, VMHandles::kOffsetOfRawPtrInHandle));
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// Get rid of arguments pushed on the stack.
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__ AddImmediate(SP, FP, kSavedContextOffsetInEntryFrame);
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// Load Isolate pointer from Context structure into CTX. Drop Context.
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__ ldr(CTX, FieldAddress(CTX, Context::isolate_offset()));
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// Restore the saved Context pointer into the Isolate structure.
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// Uses R4 as a temporary register for this.
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// Restore the saved top exit frame info back into the Isolate structure.
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// Uses R5 as a temporary register for this.
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__ PopList((1 << R4) | (1 << R5));
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{
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const intptr_t offset = Isolate::top_context_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(R7, CTX, offset12_hi);
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__ str(R4, Address(R7, offset12_lo));
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}
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{
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const intptr_t offset = Isolate::top_exit_frame_info_offset();
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const int32_t offset12_hi = offset & ~kOffset12Mask; // signed
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const uint32_t offset12_lo = offset & kOffset12Mask; // unsigned
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__ AddImmediate(R7, CTX, offset12_hi);
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__ str(R5, Address(R7, offset12_lo));
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}
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// Restore C++ ABI callee-saved registers.
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__ PopList((1 << R3) | kAbiPreservedCpuRegs); // Ignore restored R3.
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// Restore the frame pointer and return.
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__ LeaveStubFrame();
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__ Ret();
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}
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void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
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__ Unimplemented("AllocateContext stub");
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}
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void StubCode::GenerateUpdateStoreBufferStub(Assembler* assembler) {
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__ Unimplemented("UpdateStoreBuffer stub");
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}
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void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
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const Class& cls) {
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__ Unimplemented("AllocateObject stub");
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}
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void StubCode::GenerateAllocationStubForClosure(Assembler* assembler,
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const Function& func) {
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__ Unimplemented("AllocateClosure stub");
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}
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void StubCode::GenerateCallNoSuchMethodFunctionStub(Assembler* assembler) {
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__ Unimplemented("CallNoSuchMethodFunction stub");
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}
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void StubCode::GenerateOptimizedUsageCounterIncrement(Assembler* assembler) {
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__ Unimplemented("OptimizedUsageCounterIncrement stub");
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}
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void StubCode::GenerateUsageCounterIncrement(Assembler* assembler,
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Register temp_reg) {
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__ Unimplemented("UsageCounterIncrement stub");
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}
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void StubCode::GenerateNArgsCheckInlineCacheStub(Assembler* assembler,
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intptr_t num_args) {
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__ Unimplemented("NArgsCheckInlineCache stub");
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}
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void StubCode::GenerateOneArgCheckInlineCacheStub(Assembler* assembler) {
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__ Unimplemented("GenerateOneArgCheckInlineCacheStub stub");
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}
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void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
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__ Unimplemented("GenerateTwoArgsCheckInlineCacheStub stub");
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}
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void StubCode::GenerateThreeArgsCheckInlineCacheStub(Assembler* assembler) {
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__ Unimplemented("GenerateThreeArgsCheckInlineCacheStub stub");
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}
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void StubCode::GenerateOneArgOptimizedCheckInlineCacheStub(
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Assembler* assembler) {
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GenerateOptimizedUsageCounterIncrement(assembler);
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GenerateNArgsCheckInlineCacheStub(assembler, 1);
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}
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void StubCode::GenerateTwoArgsOptimizedCheckInlineCacheStub(
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Assembler* assembler) {
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GenerateOptimizedUsageCounterIncrement(assembler);
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GenerateNArgsCheckInlineCacheStub(assembler, 2);
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}
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void StubCode::GenerateThreeArgsOptimizedCheckInlineCacheStub(
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Assembler* assembler) {
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GenerateOptimizedUsageCounterIncrement(assembler);
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GenerateNArgsCheckInlineCacheStub(assembler, 3);
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}
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void StubCode::GenerateClosureCallInlineCacheStub(Assembler* assembler) {
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GenerateNArgsCheckInlineCacheStub(assembler, 1);
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}
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void StubCode::GenerateMegamorphicCallStub(Assembler* assembler) {
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GenerateNArgsCheckInlineCacheStub(assembler, 1);
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}
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void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) {
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__ Unimplemented("BreakpointStatic stub");
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}
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void StubCode::GenerateBreakpointReturnStub(Assembler* assembler) {
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__ Unimplemented("BreakpointReturn stub");
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}
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void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) {
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__ Unimplemented("BreakpointDynamic stub");
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}
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void StubCode::GenerateSubtype1TestCacheStub(Assembler* assembler) {
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__ Unimplemented("Subtype1TestCache Stub");
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}
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void StubCode::GenerateSubtype2TestCacheStub(Assembler* assembler) {
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__ Unimplemented("Subtype2TestCache Stub");
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}
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void StubCode::GenerateSubtype3TestCacheStub(Assembler* assembler) {
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__ Unimplemented("Subtype3TestCache Stub");
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}
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// Return the current stack pointer address, used to stack alignment
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// checks.
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void StubCode::GenerateGetStackPointerStub(Assembler* assembler) {
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__ Unimplemented("GetStackPointer Stub");
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}
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// Jump to the exception handler.
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// No Result.
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void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
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__ Unimplemented("JumpToExceptionHandler Stub");
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}
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// Jump to the error handler.
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// No Result.
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void StubCode::GenerateJumpToErrorHandlerStub(Assembler* assembler) {
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__ Unimplemented("JumpToErrorHandler Stub");
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}
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void StubCode::GenerateEqualityWithNullArgStub(Assembler* assembler) {
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__ Unimplemented("EqualityWithNullArg stub");
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}
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void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
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__ Unimplemented("OptimizeFunction stub");
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}
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void StubCode::GenerateIdenticalWithNumberCheckStub(Assembler* assembler) {
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__ Unimplemented("IdenticalWithNumberCheck stub");
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM
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