13ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// Copyright 2012 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/codegen.h" 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/deoptimizer.h" 7014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/full-codegen/full-codegen.h" 8014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/register-configuration.h" 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/safepoint-table.h" 10b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 11b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdochnamespace v8 { 12b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdochnamespace internal { 13b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 14b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochconst int Deoptimizer::table_entry_size_ = 8; 15b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 161e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block 171e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockint Deoptimizer::patch_size() { 181e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block const int kCallInstructionSizeInWords = 3; 191e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block return kCallInstructionSizeInWords * Assembler::kInstrSize; 201e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block} 211e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block 221e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block 23958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Berniervoid Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(Handle<Code> code) { 24958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Empty because there is no need for relocation information for the code 25958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // patching in Deoptimizer::PatchCodeForDeoptimization below. 26958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 27958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 28958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 29b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid Deoptimizer::PatchCodeForDeoptimization(Isolate* isolate, Code* code) { 302b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch Address code_start_address = code->instruction_start(); 31b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Invalidate the relocation information, as it will become invalid by the 32b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // code patching below, and is not needed any more. 33b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch code->InvalidateRelocation(); 34b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 35b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (FLAG_zap_code_space) { 36b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Fail hard and early if we enter this code object again. 37b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch byte* pointer = code->FindCodeAgeSequence(); 38b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (pointer != NULL) { 39b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch pointer += kNoCodeAgeSequenceLength; 40b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else { 41b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch pointer = code->instruction_start(); 42b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 43014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CodePatcher patcher(isolate, pointer, 1); 44b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch patcher.masm()->bkpt(0); 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 46b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DeoptimizationInputData* data = 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DeoptimizationInputData::cast(code->deoptimization_data()); 48b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int osr_offset = data->OsrPcOffset()->value(); 49b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (osr_offset > 0) { 50014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CodePatcher osr_patcher(isolate, code->instruction_start() + osr_offset, 51014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1); 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch osr_patcher.masm()->bkpt(0); 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 54b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 562b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch DeoptimizationInputData* deopt_data = 572b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch DeoptimizationInputData::cast(code->deoptimization_data()); 58b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch#ifdef DEBUG 592b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch Address prev_call_address = NULL; 60b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch#endif 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For each LLazyBailout instruction insert a call to the corresponding 62b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // deoptimization entry. 632b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch for (int i = 0; i < deopt_data->DeoptCount(); i++) { 642b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch if (deopt_data->Pc(i)->value() == -1) continue; 652b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch Address call_address = code_start_address + deopt_data->Pc(i)->value(); 66b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address deopt_entry = GetDeoptimizationEntry(isolate, i, LAZY); 67b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // We need calls to have a predictable size in the unoptimized code, but 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // this is optimized code, so we don't have to have a predictable size. 69b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int call_size_in_bytes = 70b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MacroAssembler::CallSizeNotPredictableCodeSize(isolate, 71b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch deopt_entry, 72b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RelocInfo::NONE32); 732b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch int call_size_in_words = call_size_in_bytes / Assembler::kInstrSize; 74b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(call_size_in_bytes % Assembler::kInstrSize == 0); 75b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(call_size_in_bytes <= patch_size()); 76014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CodePatcher patcher(isolate, call_address, call_size_in_words); 77b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch patcher.masm()->Call(deopt_entry, RelocInfo::NONE32); 78b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(prev_call_address == NULL || 792b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch call_address >= prev_call_address + patch_size()); 80b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(call_address + patch_size() <= code->instruction_end()); 81b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch#ifdef DEBUG 822b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch prev_call_address = call_address; 83b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch#endif 842b4ba1175df6a5a6b9b5cda034189197bf6565ecBen Murdoch } 85b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch} 86b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 87b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) { 893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Set the register values. The values are not important as there are no 903fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // callee saved registers in JavaScript frames, so all registers are 913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // spilled. Registers fp and sp are set to the correct values though. 923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < Register::kNumRegisters; i++) { 943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch input_->SetRegister(i, i * 4); 953fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch input_->SetRegister(sp.code(), reinterpret_cast<intptr_t>(frame->sp())); 973fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch input_->SetRegister(fp.code(), reinterpret_cast<intptr_t>(frame->fp())); 98014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < DoubleRegister::kMaxNumRegisters; i++) { 993fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch input_->SetDoubleRegister(i, 0.0); 1003fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 101b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 1023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Fill the frame content from the actual data on the frame. 1033fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (unsigned i = 0; i < input_->GetFrameSize(); i += kPointerSize) { 1043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch input_->SetFrameSlot(i, Memory::uint32_at(tos + i)); 1053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 1073fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1083fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 109b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid Deoptimizer::SetPlatformCompiledStubRegisters( 110b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FrameDescription* output_frame, CodeStubDescriptor* descriptor) { 111b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ApiFunction function(descriptor->deoptimization_handler()); 112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_); 113b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t handler = reinterpret_cast<intptr_t>(xref.address()); 114b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int params = descriptor->GetHandlerParameterCount(); 115b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch output_frame->SetRegister(r0.code(), params); 116b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch output_frame->SetRegister(r1.code(), handler); 117b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 118b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 119b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 120b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) { 121b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < DwVfpRegister::kMaxNumRegisters; ++i) { 122b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double double_value = input_->GetDoubleRegister(i); 123b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch output_frame->SetDoubleRegister(i, double_value); 124b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 126b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 127b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 128b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool Deoptimizer::HasAlignmentPadding(JSFunction* function) { 129b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // There is no dynamic alignment padding on ARM in the input frame. 130b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return false; 131b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1343fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch#define __ masm()-> 135b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 136b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch// This code tries to be close to ia32 code so that any changes can be 137b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch// easily ported. 138014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid Deoptimizer::TableEntryGenerator::Generate() { 139b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch GeneratePrologue(); 14044f0eee88ff00398ff7f715fab053374d808c90dSteve Block 141b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Save all general purpose registers before messing with them. 142b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch const int kNumberOfRegisters = Register::kNumRegisters; 143b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 144b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Everything but pc, lr and ip which will be saved but not restored. 145b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch RegList restored_regs = kJSCallerSaved | kCalleeSaved | ip.bit(); 146b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 147014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch const int kDoubleRegsSize = kDoubleSize * DwVfpRegister::kMaxNumRegisters; 148b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 149b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Save all allocatable VFP registers before messing with them. 150b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(kDoubleRegZero.code() == 14); 151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(kScratchDoubleReg.code() == 15); 152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Check CPU flags for number of registers, setting the Z condition flag. 154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ CheckFor32DRegs(ip); 155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 156014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Push registers d0-d15, and possibly d16-d31, on the stack. 157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If d16-d31 are not pushed, decrease the stack pointer instead. 158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ vstm(db_w, sp, d16, d31, ne); 159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ sub(sp, sp, Operand(16 * kDoubleSize), LeaveCC, eq); 160014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch __ vstm(db_w, sp, d0, d15); 161b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 162b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Push all 16 registers (needed to populate FrameDescription::registers_). 16369a99ed0b2b2ef69d393c371b03db3a98aaf880eBen Murdoch // TODO(1588) Note that using pc with stm is deprecated, so we should perhaps 16469a99ed0b2b2ef69d393c371b03db3a98aaf880eBen Murdoch // handle this a bit differently. 165b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ stm(db_w, sp, restored_regs | sp.bit() | lr.bit() | pc.bit()); 166b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 167014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch __ mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); 168014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch __ str(fp, MemOperand(ip)); 169014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 170b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch const int kSavedRegistersAreaSize = 171b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch (kNumberOfRegisters * kPointerSize) + kDoubleRegsSize; 172b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 173b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Get the bailout id from the stack. 174b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r2, MemOperand(sp, kSavedRegistersAreaSize)); 175b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Get the address of the location in the code object (r3) (return 177b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // address for lazy deoptimization) and compute the fp-to-sp delta in 178b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // register r4. 179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ mov(r3, lr); 180b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Correct one word for bailout id. 181b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ add(r4, sp, Operand(kSavedRegistersAreaSize + (1 * kPointerSize))); 182b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ sub(r4, fp, r4); 183b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 184b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Allocate a new deoptimizer object. 185b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Pass four arguments in r0 to r3 and fifth argument on stack. 1868b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch __ PrepareCallCFunction(6, r5); 187b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); 188b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ mov(r1, Operand(type())); // bailout type, 189b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // r2: bailout id already loaded. 190b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // r3: code address or 0 already loaded. 191b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ str(r4, MemOperand(sp, 0 * kPointerSize)); // Fp-to-sp delta. 192b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ mov(r5, Operand(ExternalReference::isolate_address(isolate()))); 1938b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch __ str(r5, MemOperand(sp, 1 * kPointerSize)); // Isolate. 194b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Call Deoptimizer::New(). 1953ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch { 1963ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch AllowExternalCallThatCantCauseGC scope(masm()); 197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ CallCFunction(ExternalReference::new_deoptimizer_function(isolate()), 6); 1983ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 199b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 200b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Preserve "deoptimizer" object in register r0 and get the input 201b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // frame descriptor pointer to r1 (deoptimizer->input_); 202b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r1, MemOperand(r0, Deoptimizer::input_offset())); 203b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 204b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Copy core registers into FrameDescription::registers_[kNumRegisters]. 205b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(Register::kNumRegisters == kNumberOfRegisters); 206b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch for (int i = 0; i < kNumberOfRegisters; i++) { 2071e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 208b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r2, MemOperand(sp, i * kPointerSize)); 209b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ str(r2, MemOperand(r1, offset)); 210b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 211b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 212b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Copy VFP registers to 213b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // double_registers_[DoubleRegister::kMaxNumAllocatableRegisters] 214b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch int double_regs_offset = FrameDescription::double_registers_offset(); 215014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch const RegisterConfiguration* config = 216014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT); 217014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < config->num_allocatable_double_registers(); ++i) { 218014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch int code = config->GetAllocatableDoubleCode(i); 219014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch int dst_offset = code * kDoubleSize + double_regs_offset; 220014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch int src_offset = code * kDoubleSize + kNumberOfRegisters * kPointerSize; 221b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ vldr(d0, sp, src_offset); 222b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ vstr(d0, r1, dst_offset); 223b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 224b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 225b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Remove the bailout id and the saved registers from the stack. 226b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ add(sp, sp, Operand(kSavedRegistersAreaSize + (1 * kPointerSize))); 227b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 228b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Compute a pointer to the unwinding limit in register r2; that is 229b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // the first stack slot not part of the input frame. 230b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r2, MemOperand(r1, FrameDescription::frame_size_offset())); 231b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ add(r2, r2, sp); 232b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 233b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Unwind the stack down to - but not including - the unwinding 234b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // limit and copy the contents of the activation frame to the input 235b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // frame description. 236b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ add(r3, r1, Operand(FrameDescription::frame_content_offset())); 237b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch Label pop_loop; 238b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Label pop_loop_header; 239b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ b(&pop_loop_header); 240b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ bind(&pop_loop); 241b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(r4); 242b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ str(r4, MemOperand(r3, 0)); 243b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ add(r3, r3, Operand(sizeof(uint32_t))); 244b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ bind(&pop_loop_header); 245b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ cmp(r2, sp); 246b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ b(ne, &pop_loop); 247b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 248b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Compute the output frame in the deoptimizer. 249b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ push(r0); // Preserve deoptimizer object across call. 250b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // r0: deoptimizer object; r1: scratch. 251b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ PrepareCallCFunction(1, r1); 252b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Call Deoptimizer::ComputeOutputFrames(). 2533ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch { 2543ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch AllowExternalCallThatCantCauseGC scope(masm()); 2553ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch __ CallCFunction( 256b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalReference::compute_output_frames_function(isolate()), 1); 2573ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 258b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(r0); // Restore deoptimizer object (class Deoptimizer). 259b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 260b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Replace the current (input) frame with the output frames. 261b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Label outer_push_loop, inner_push_loop, 262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch outer_loop_header, inner_loop_header; 263b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Outer loop state: r4 = current "FrameDescription** output_", 264b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // r1 = one past the last FrameDescription**. 265b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r1, MemOperand(r0, Deoptimizer::output_count_offset())); 266b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ ldr(r4, MemOperand(r0, Deoptimizer::output_offset())); // r4 is output_. 267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ add(r1, r4, Operand(r1, LSL, 2)); 268b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ jmp(&outer_loop_header); 269b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ bind(&outer_push_loop); 270b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Inner loop state: r2 = current FrameDescription*, r3 = loop index. 271b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ ldr(r2, MemOperand(r4, 0)); // output_[ix] 272b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r3, MemOperand(r2, FrameDescription::frame_size_offset())); 273b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ jmp(&inner_loop_header); 274b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ bind(&inner_push_loop); 275b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ sub(r3, r3, Operand(sizeof(uint32_t))); 276b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ add(r6, r2, Operand(r3)); 277b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ ldr(r6, MemOperand(r6, FrameDescription::frame_content_offset())); 278b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ push(r6); 279b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ bind(&inner_loop_header); 280b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ cmp(r3, Operand::Zero()); 281b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ b(ne, &inner_push_loop); // test for gt? 282b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ add(r4, r4, Operand(kPointerSize)); 283b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ bind(&outer_loop_header); 284b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ cmp(r4, r1); 285b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ b(lt, &outer_push_loop); 286b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 287b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Check CPU flags for number of registers, setting the Z condition flag. 288b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ CheckFor32DRegs(ip); 289b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 290b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ ldr(r1, MemOperand(r0, Deoptimizer::input_offset())); 291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int src_offset = FrameDescription::double_registers_offset(); 292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < DwVfpRegister::kMaxNumRegisters; ++i) { 293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == kDoubleRegZero.code()) continue; 294b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == kScratchDoubleReg.code()) continue; 295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 296b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const DwVfpRegister reg = DwVfpRegister::from_code(i); 297b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ vldr(reg, r1, src_offset, i < 16 ? al : ne); 298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch src_offset += kDoubleSize; 299b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 300b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Push state, pc, and continuation from the last output frame. 302b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ ldr(r6, MemOperand(r2, FrameDescription::state_offset())); 303b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ push(r6); 304b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r6, MemOperand(r2, FrameDescription::pc_offset())); 305b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ push(r6); 306b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r6, MemOperand(r2, FrameDescription::continuation_offset())); 307b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ push(r6); 308b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 309b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Push the registers from the last output frame. 310b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch for (int i = kNumberOfRegisters - 1; i >= 0; i--) { 3111e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 312b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldr(r6, MemOperand(r2, offset)); 313b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ push(r6); 314b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 315b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 316b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch // Restore the registers from the stack. 317b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ ldm(ia_w, sp, restored_regs); // all but pc registers. 318b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(ip); // remove sp 319b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(ip); // remove lr 320b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 321c7cc028aaeedbbfa11c11d0b7b243b3d9e837ed9Ben Murdoch __ InitializeRootRegister(); 322b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 323b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(ip); // remove pc 324b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ pop(ip); // get continuation, leave pc on stack 325b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ pop(lr); 326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ Jump(ip); 327b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ stop("Unreachable."); 328b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch} 329b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 330b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 331b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdochvoid Deoptimizer::TableEntryGenerator::GeneratePrologue() { 332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Create a sequence of deoptimization entries. 333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Note that registers are still live when jumping to an entry. 334b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch Label done; 335b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch for (int i = 0; i < count(); i++) { 336b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch int start = masm()->pc_offset(); 337b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch USE(start); 338b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ mov(ip, Operand(i)); 339b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ b(&done); 340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(masm()->pc_offset() - start == table_entry_size_); 341b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 342b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch __ bind(&done); 343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch __ push(ip); 344b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch} 345b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 346b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 347b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid FrameDescription::SetCallerPc(unsigned offset, intptr_t value) { 348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SetFrameSlot(offset, value); 349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 350b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { 353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SetFrameSlot(offset, value); 354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) { 358014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(FLAG_enable_embedded_constant_pool); 359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SetFrameSlot(offset, value); 360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 363b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch#undef __ 364b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 365014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace internal 366014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace v8 367