1864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org// Copyright 2012 the V8 project authors. All rights reserved. 2864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org// Use of this source code is governed by a BSD-style license that can be 3864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org// found in the LICENSE file. 4864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 5196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/v8.h" 6864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 7864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#if V8_TARGET_ARCH_X87 8864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 9196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/codegen.h" 10196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/deoptimizer.h" 11196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/full-codegen.h" 12196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/safepoint-table.h" 13864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 14864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgnamespace v8 { 15864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgnamespace internal { 16864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 17864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgconst int Deoptimizer::table_entry_size_ = 10; 18864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 19864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 20864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgint Deoptimizer::patch_size() { 21864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org return Assembler::kCallInstructionLength; 22864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 23864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 24864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 25864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(Handle<Code> code) { 26864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Isolate* isolate = code->GetIsolate(); 27864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org HandleScope scope(isolate); 28864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 29864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Compute the size of relocation information needed for the code 30864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // patching in Deoptimizer::DeoptimizeFunction. 31864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int min_reloc_size = 0; 32864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int prev_pc_offset = 0; 33864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData* deopt_data = 34864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 35864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < deopt_data->DeoptCount(); i++) { 36864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int pc_offset = deopt_data->Pc(i)->value(); 37864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (pc_offset == -1) continue; 38e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK_GE(pc_offset, prev_pc_offset); 39864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int pc_delta = pc_offset - prev_pc_offset; 40864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // We use RUNTIME_ENTRY reloc info which has a size of 2 bytes 41864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // if encodable with small pc delta encoding and up to 6 bytes 42864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // otherwise. 43864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (pc_delta <= RelocInfo::kMaxSmallPCDelta) { 44864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org min_reloc_size += 2; 45864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } else { 46864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org min_reloc_size += 6; 47864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 48864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org prev_pc_offset = pc_offset; 49864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 50864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 51864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // If the relocation information is not big enough we create a new 52864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // relocation info object that is padded with comments to make it 53864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // big enough for lazy doptimization. 54864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int reloc_length = code->relocation_info()->length(); 55864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (min_reloc_size > reloc_length) { 56864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int comment_reloc_size = RelocInfo::kMinRelocCommentSize; 57864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Padding needed. 58864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int min_padding = min_reloc_size - reloc_length; 59864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Number of comments needed to take up at least that much space. 60864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int additional_comments = 61864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org (min_padding + comment_reloc_size - 1) / comment_reloc_size; 62864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Actual padding size. 63864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int padding = additional_comments * comment_reloc_size; 64864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Allocate new relocation info and copy old relocation to the end 65864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // of the new relocation info array because relocation info is 66864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // written and read backwards. 67864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Factory* factory = isolate->factory(); 68864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Handle<ByteArray> new_reloc = 69864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org factory->NewByteArray(reloc_length + padding, TENURED); 70d06b9264b1c886fc80a100e9915cf8ae07fdb4e5machenbach@chromium.org MemCopy(new_reloc->GetDataStartAddress() + padding, 71d06b9264b1c886fc80a100e9915cf8ae07fdb4e5machenbach@chromium.org code->relocation_info()->GetDataStartAddress(), reloc_length); 72864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Create a relocation writer to write the comments in the padding 73864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // space. Use position 0 for everything to ensure short encoding. 74864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org RelocInfoWriter reloc_info_writer( 75864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org new_reloc->GetDataStartAddress() + padding, 0); 76864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org intptr_t comment_string 77864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org = reinterpret_cast<intptr_t>(RelocInfo::kFillerCommentString); 78864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org RelocInfo rinfo(0, RelocInfo::COMMENT, comment_string, NULL); 79864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < additional_comments; ++i) { 80864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#ifdef DEBUG 81864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org byte* pos_before = reloc_info_writer.pos(); 82864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#endif 83864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reloc_info_writer.Write(&rinfo); 84e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(RelocInfo::kMinRelocCommentSize == 85864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org pos_before - reloc_info_writer.pos()); 86864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 87864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Replace relocation information on the code object. 88864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org code->set_relocation_info(*new_reloc); 89864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 90864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 91864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 92864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 93864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::PatchCodeForDeoptimization(Isolate* isolate, Code* code) { 94864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address code_start_address = code->instruction_start(); 95864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 96864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (FLAG_zap_code_space) { 97864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Fail hard and early if we enter this code object again. 98864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org byte* pointer = code->FindCodeAgeSequence(); 99864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (pointer != NULL) { 100864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org pointer += kNoCodeAgeSequenceLength; 101864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } else { 102864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org pointer = code->instruction_start(); 103864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 104864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org CodePatcher patcher(pointer, 1); 105864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org patcher.masm()->int3(); 106864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 107864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData* data = 108864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 109864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int osr_offset = data->OsrPcOffset()->value(); 110864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (osr_offset > 0) { 111864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org CodePatcher osr_patcher(code->instruction_start() + osr_offset, 1); 112864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org osr_patcher.masm()->int3(); 113864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 114864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 115864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 116864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // We will overwrite the code's relocation info in-place. Relocation info 117864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // is written backward. The relocation info is the payload of a byte 118864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // array. Later on we will slide this to the start of the byte array and 119864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // create a filler object in the remaining space. 120864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org ByteArray* reloc_info = code->relocation_info(); 121864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address reloc_end_address = reloc_info->address() + reloc_info->Size(); 122864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org RelocInfoWriter reloc_info_writer(reloc_end_address, code_start_address); 123864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 124864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Since the call is a relative encoding, write new 125864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // reloc info. We do not need any of the existing reloc info because the 126864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // existing code will not be used again (we zap it in debug builds). 127864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // 128864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Emit call to lazy deoptimization at all lazy deopt points. 129864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData* deopt_data = 130864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 131864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#ifdef DEBUG 132864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address prev_call_address = NULL; 133864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#endif 134864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // For each LLazyBailout instruction insert a call to the corresponding 135864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // deoptimization entry. 136864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < deopt_data->DeoptCount(); i++) { 137864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (deopt_data->Pc(i)->value() == -1) continue; 138864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Patch lazy deoptimization entry. 139864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address call_address = code_start_address + deopt_data->Pc(i)->value(); 140864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org CodePatcher patcher(call_address, patch_size()); 141864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address deopt_entry = GetDeoptimizationEntry(isolate, i, LAZY); 142864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org patcher.masm()->call(deopt_entry, RelocInfo::NONE32); 143864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // We use RUNTIME_ENTRY for deoptimization bailouts. 144864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org RelocInfo rinfo(call_address + 1, // 1 after the call opcode. 145864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org RelocInfo::RUNTIME_ENTRY, 146864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reinterpret_cast<intptr_t>(deopt_entry), 147864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org NULL); 148864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reloc_info_writer.Write(&rinfo); 149e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK_GE(reloc_info_writer.pos(), 150864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reloc_info->address() + ByteArray::kHeaderSize); 151e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(prev_call_address == NULL || 152864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org call_address >= prev_call_address + patch_size()); 153e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(call_address + patch_size() <= code->instruction_end()); 154864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#ifdef DEBUG 155864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org prev_call_address = call_address; 156864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#endif 157864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 158864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 159864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Move the relocation info to the beginning of the byte array. 160864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int new_reloc_size = reloc_end_address - reloc_info_writer.pos(); 161d06b9264b1c886fc80a100e9915cf8ae07fdb4e5machenbach@chromium.org MemMove(code->relocation_start(), reloc_info_writer.pos(), new_reloc_size); 162864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 163864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // The relocation info is in place, update the size. 164864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reloc_info->set_length(new_reloc_size); 165864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 166864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Handle the junk part after the new relocation info. We will create 167864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // a non-live object in the extra space at the end of the former reloc info. 168864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Address junk_address = reloc_info->address() + reloc_info->Size(); 169e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(junk_address <= reloc_end_address); 170864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org isolate->heap()->CreateFillerObjectAt(junk_address, 171864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org reloc_end_address - junk_address); 172864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 173864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 174864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 175864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) { 176864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Set the register values. The values are not important as there are no 177864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // callee saved registers in JavaScript frames, so all registers are 178864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // spilled. Registers ebp and esp are set to the correct values though. 179864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 180864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < Register::kNumRegisters; i++) { 181864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_->SetRegister(i, i * 4); 182864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 183864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_->SetRegister(esp.code(), reinterpret_cast<intptr_t>(frame->sp())); 184864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_->SetRegister(ebp.code(), reinterpret_cast<intptr_t>(frame->fp())); 185864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) { 186864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_->SetDoubleRegister(i, 0.0); 187864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 188864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 189864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Fill the frame content from the actual data on the frame. 190864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (unsigned i = 0; i < input_->GetFrameSize(); i += kPointerSize) { 191864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_->SetFrameSlot(i, Memory::uint32_at(tos + i)); 192864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 193864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 194864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 195864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 196864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::SetPlatformCompiledStubRegisters( 197b376fed08cb9d90a3f67f655adf63c4b35feb106machenbach@chromium.org FrameDescription* output_frame, CodeStubDescriptor* descriptor) { 198864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org intptr_t handler = 19947390597afd6b17870f41dfb5dd8c057aea1f068machenbach@chromium.org reinterpret_cast<intptr_t>(descriptor->deoptimization_handler()); 200864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int params = descriptor->GetHandlerParameterCount(); 201864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org output_frame->SetRegister(eax.code(), params); 202864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org output_frame->SetRegister(ebx.code(), handler); 203864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 204864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 205864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 206864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) { 20706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org for (int i = 0; i < X87Register::kMaxNumAllocatableRegisters; ++i) { 20806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org double double_value = input_->GetDoubleRegister(i); 20906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org output_frame->SetDoubleRegister(i, double_value); 21006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org } 211864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 212864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 213864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 214864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgbool Deoptimizer::HasAlignmentPadding(JSFunction* function) { 215864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int parameter_count = function->shared()->formal_parameter_count() + 1; 216864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org unsigned input_frame_size = input_->GetFrameSize(); 217864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org unsigned alignment_state_offset = 218864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org input_frame_size - parameter_count * kPointerSize - 219864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org StandardFrameConstants::kFixedFrameSize - 220864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org kPointerSize; 221e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(JavaScriptFrameConstants::kDynamicAlignmentStateOffset == 222864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org JavaScriptFrameConstants::kLocal0Offset); 223864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int32_t alignment_state = input_->GetFrameSlot(alignment_state_offset); 224864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org return (alignment_state == kAlignmentPaddingPushed); 225864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 226864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 227864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 228864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#define __ masm()-> 229864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 230864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::EntryGenerator::Generate() { 231864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org GeneratePrologue(); 232864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 233864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Save all general purpose registers before messing with them. 234864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org const int kNumberOfRegisters = Register::kNumRegisters; 23506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 23606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org const int kDoubleRegsSize = 23706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org kDoubleSize * X87Register::kMaxNumAllocatableRegisters; 23806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 23906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Reserve space for x87 fp registers. 24006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ sub(esp, Immediate(kDoubleRegsSize)); 24106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 242864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ pushad(); 243864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 24406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // GP registers are safe to use now. 24506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Save used x87 fp registers in correct position of previous reserve space. 24606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org Label loop, done; 24706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Get the layout of x87 stack. 24806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ sub(esp, Immediate(kPointerSize)); 24906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ fistp_s(MemOperand(esp, 0)); 25006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ pop(eax); 25106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Preserve stack layout in edi 25206b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ mov(edi, eax); 25306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Get the x87 stack depth, the first 3 bits. 25406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ mov(ecx, eax); 25506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ and_(ecx, 0x7); 25606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ j(zero, &done, Label::kNear); 25706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 25806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ bind(&loop); 25906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ shr(eax, 0x3); 26006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ mov(ebx, eax); 26106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ and_(ebx, 0x7); // Extract the st_x index into ebx. 26206b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Pop TOS to the correct position. The disp(0x20) is due to pushad. 26306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // The st_i should be saved to (esp + ebx * kDoubleSize + 0x20). 26406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ fstp_d(Operand(esp, ebx, times_8, 0x20)); 26506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ dec(ecx); // Decrease stack depth. 26606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ j(not_zero, &loop, Label::kNear); 26706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ bind(&done); 26806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 26906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org const int kSavedRegistersAreaSize = 27006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org kNumberOfRegisters * kPointerSize + kDoubleRegsSize; 271864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 272864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Get the bailout id from the stack. 273864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ebx, Operand(esp, kSavedRegistersAreaSize)); 274864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 275864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Get the address of the location in the code object 276864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // and compute the fp-to-sp delta in register edx. 277864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ecx, Operand(esp, kSavedRegistersAreaSize + 1 * kPointerSize)); 278864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ lea(edx, Operand(esp, kSavedRegistersAreaSize + 2 * kPointerSize)); 279864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 280864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ sub(edx, ebp); 281864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ neg(edx); 282864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 28306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ push(edi); 284864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Allocate a new deoptimizer object. 285864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ PrepareCallCFunction(6, eax); 286864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); 287864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 0 * kPointerSize), eax); // Function. 288864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 1 * kPointerSize), Immediate(type())); // Bailout type. 289864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 2 * kPointerSize), ebx); // Bailout id. 290864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 3 * kPointerSize), ecx); // Code address or 0. 291864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 4 * kPointerSize), edx); // Fp-to-sp delta. 292864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 5 * kPointerSize), 293864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Immediate(ExternalReference::isolate_address(isolate()))); 294864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org { 295864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org AllowExternalCallThatCantCauseGC scope(masm()); 296864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ CallCFunction(ExternalReference::new_deoptimizer_function(isolate()), 6); 297864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 298864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 29906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ pop(edi); 30006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 301864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Preserve deoptimizer object in register eax and get the input 302864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // frame descriptor pointer. 303864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ebx, Operand(eax, Deoptimizer::input_offset())); 304864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 305864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Fill in the input registers. 306864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = kNumberOfRegisters - 1; i >= 0; i--) { 307864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 308864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ pop(Operand(ebx, offset)); 309864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 310864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 31106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org int double_regs_offset = FrameDescription::double_registers_offset(); 31206b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Fill in the double input registers. 31306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org for (int i = 0; i < X87Register::kMaxNumAllocatableRegisters; ++i) { 31406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org int dst_offset = i * kDoubleSize + double_regs_offset; 31506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org int src_offset = i * kDoubleSize; 31606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ fld_d(Operand(esp, src_offset)); 31706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ fstp_d(Operand(ebx, dst_offset)); 31806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org } 31906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 320864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Clear FPU all exceptions. 321864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // TODO(ulan): Find out why the TOP register is not zero here in some cases, 322864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // and check that the generated code never deoptimizes with unbalanced stack. 323864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ fnclex(); 324864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 325864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Remove the bailout id, return address and the double registers. 32606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ add(esp, Immediate(kDoubleRegsSize + 2 * kPointerSize)); 327864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 328864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Compute a pointer to the unwinding limit in register ecx; that is 329864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // the first stack slot not part of the input frame. 330864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ecx, Operand(ebx, FrameDescription::frame_size_offset())); 331864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ add(ecx, esp); 332864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 333864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Unwind the stack down to - but not including - the unwinding 334864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // limit and copy the contents of the activation frame to the input 335864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // frame description. 336864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ lea(edx, Operand(ebx, FrameDescription::frame_content_offset())); 337864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Label pop_loop_header; 338864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ jmp(&pop_loop_header); 339864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Label pop_loop; 340864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&pop_loop); 341864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ pop(Operand(edx, 0)); 342864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ add(edx, Immediate(sizeof(uint32_t))); 343864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&pop_loop_header); 344864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ cmp(ecx, esp); 345864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ j(not_equal, &pop_loop); 346864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 347864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Compute the output frame in the deoptimizer. 34806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ push(edi); 349864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(eax); 350864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ PrepareCallCFunction(1, ebx); 351864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(Operand(esp, 0 * kPointerSize), eax); 352864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org { 353864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org AllowExternalCallThatCantCauseGC scope(masm()); 354864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ CallCFunction( 355864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org ExternalReference::compute_output_frames_function(isolate()), 1); 356864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 357864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ pop(eax); 35806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ pop(edi); 359864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 360864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // If frame was dynamically aligned, pop padding. 361864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Label no_padding; 362864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ cmp(Operand(eax, Deoptimizer::has_alignment_padding_offset()), 363864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Immediate(0)); 364864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ j(equal, &no_padding); 365864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ pop(ecx); 366864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org if (FLAG_debug_code) { 367864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ cmp(ecx, Immediate(kAlignmentZapValue)); 368864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ Assert(equal, kAlignmentMarkerExpected); 369864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 370864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&no_padding); 371864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 372864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Replace the current frame with the output frames. 373864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Label outer_push_loop, inner_push_loop, 374864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org outer_loop_header, inner_loop_header; 375864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Outer loop state: eax = current FrameDescription**, edx = one past the 376864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // last FrameDescription**. 377864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(edx, Operand(eax, Deoptimizer::output_count_offset())); 378864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(eax, Operand(eax, Deoptimizer::output_offset())); 379864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ lea(edx, Operand(eax, edx, times_4, 0)); 380864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ jmp(&outer_loop_header); 381864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&outer_push_loop); 382864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Inner loop state: ebx = current FrameDescription*, ecx = loop index. 383864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ebx, Operand(eax, 0)); 384864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ mov(ecx, Operand(ebx, FrameDescription::frame_size_offset())); 385864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ jmp(&inner_loop_header); 386864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&inner_push_loop); 387864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ sub(ecx, Immediate(sizeof(uint32_t))); 388864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(Operand(ebx, ecx, times_1, FrameDescription::frame_content_offset())); 389864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&inner_loop_header); 390864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ test(ecx, ecx); 391864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ j(not_zero, &inner_push_loop); 392864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ add(eax, Immediate(kPointerSize)); 393864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&outer_loop_header); 394864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ cmp(eax, edx); 395864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ j(below, &outer_push_loop); 396864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 39706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 39806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // In case of a failed STUB, we have to restore the x87 stack. 39906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // x87 stack layout is in edi. 40006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org Label loop2, done2; 40106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org // Get the x87 stack depth, the first 3 bits. 40206b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ mov(ecx, edi); 40306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ and_(ecx, 0x7); 40406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ j(zero, &done2, Label::kNear); 40506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 40606b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ lea(ecx, Operand(ecx, ecx, times_2, 0)); 40706b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ bind(&loop2); 40806b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ mov(eax, edi); 40906b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ shr_cl(eax); 41006b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ and_(eax, 0x7); 41106b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ fld_d(Operand(ebx, eax, times_8, double_regs_offset)); 41206b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ sub(ecx, Immediate(0x3)); 41306b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ j(not_zero, &loop2, Label::kNear); 41406b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org __ bind(&done2); 41506b2696801712948b665372a38f96b1f10be6997machenbach@chromium.org 416864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Push state, pc, and continuation from the last output frame. 417864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(Operand(ebx, FrameDescription::state_offset())); 418864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(Operand(ebx, FrameDescription::pc_offset())); 419864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(Operand(ebx, FrameDescription::continuation_offset())); 420864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 421864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 422864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Push the registers from the last output frame. 423864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < kNumberOfRegisters; i++) { 424864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 425864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push(Operand(ebx, offset)); 426864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 427864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 428864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Restore the registers from the stack. 429864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ popad(); 430864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 431864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Return to the continuation point. 432864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ ret(0); 433864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 434864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 435864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 436864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid Deoptimizer::TableEntryGenerator::GeneratePrologue() { 437864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // Create a sequence of deoptimization entries. 438864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org Label done; 439864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org for (int i = 0; i < count(); i++) { 440864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org int start = masm()->pc_offset(); 441864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org USE(start); 442864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ push_imm32(i); 443864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ jmp(&done); 444e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(masm()->pc_offset() - start == table_entry_size_); 445864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org } 446864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org __ bind(&done); 447864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 448864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 449864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 450864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid FrameDescription::SetCallerPc(unsigned offset, intptr_t value) { 451864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org SetFrameSlot(offset, value); 452864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 453864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 454864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 455864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { 456864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org SetFrameSlot(offset, value); 457864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 458864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 459864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 460864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.orgvoid FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) { 461864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org // No out-of-line constant pool support. 462864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org UNREACHABLE(); 463864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} 464864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 465864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 466864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#undef __ 467864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 468864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 469864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org} } // namespace v8::internal 470864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org 471864abd7677f434b5aef191e3388e71cd4dd1e6c8machenbach@chromium.org#endif // V8_TARGET_ARCH_X87 472