1659ceec4628056d3c6e7076c850fba1c412cbb8ayangguo@chromium.org// Copyright 2012 the V8 project authors. All rights reserved. 23484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// Use of this source code is governed by a BSD-style license that can be 33484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// found in the LICENSE file. 4a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 5196eb601290dc49c3754da728dc58700dff2de1bmachenbach@chromium.org#include "src/v8.h" 6a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 793a47f4837f2137c8d8349250fd8e91da3108126jkummerow@chromium.org#if V8_TARGET_ARCH_IA32 8c6c5718277d4047fad1e034396228ce15571b5a4sgjesse@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" 13a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 14a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.orgnamespace v8 { 15a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.orgnamespace internal { 16a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 177c2628c3f0353f0558760c3ca442f934263ea766kmillikin@chromium.orgconst int Deoptimizer::table_entry_size_ = 10; 18a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 1931b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org 2031b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.orgint Deoptimizer::patch_size() { 2131b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org return Assembler::kCallInstructionLength; 2231b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org} 2331b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org 2431b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org 257979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.orgvoid Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(Handle<Code> code) { 267979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org Isolate* isolate = code->GetIsolate(); 277979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org HandleScope scope(isolate); 287979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org 297979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Compute the size of relocation information needed for the code 307979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // patching in Deoptimizer::DeoptimizeFunction. 317979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int min_reloc_size = 0; 3227bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org int prev_pc_offset = 0; 3327bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org DeoptimizationInputData* deopt_data = 3427bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 3527bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org for (int i = 0; i < deopt_data->DeoptCount(); i++) { 3627bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org int pc_offset = deopt_data->Pc(i)->value(); 3727bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org if (pc_offset == -1) continue; 38e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK_GE(pc_offset, prev_pc_offset); 3927bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org int pc_delta = pc_offset - prev_pc_offset; 4027bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // We use RUNTIME_ENTRY reloc info which has a size of 2 bytes 4127bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // if encodable with small pc delta encoding and up to 6 bytes 4227bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // otherwise. 4327bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org if (pc_delta <= RelocInfo::kMaxSmallPCDelta) { 4427bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org min_reloc_size += 2; 4527bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org } else { 4627bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org min_reloc_size += 6; 477979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org } 4827bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org prev_pc_offset = pc_offset; 497979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org } 507979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org 517979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // If the relocation information is not big enough we create a new 527979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // relocation info object that is padded with comments to make it 537979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // big enough for lazy doptimization. 547979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int reloc_length = code->relocation_info()->length(); 557979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org if (min_reloc_size > reloc_length) { 567979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int comment_reloc_size = RelocInfo::kMinRelocCommentSize; 577979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Padding needed. 587979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int min_padding = min_reloc_size - reloc_length; 597979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Number of comments needed to take up at least that much space. 607979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int additional_comments = 617979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org (min_padding + comment_reloc_size - 1) / comment_reloc_size; 627979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Actual padding size. 637979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org int padding = additional_comments * comment_reloc_size; 647979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Allocate new relocation info and copy old relocation to the end 657979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // of the new relocation info array because relocation info is 667979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // written and read backwards. 677979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org Factory* factory = isolate->factory(); 687979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org Handle<ByteArray> new_reloc = 697979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@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); 727979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Create a relocation writer to write the comments in the padding 737979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // space. Use position 0 for everything to ensure short encoding. 747979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org RelocInfoWriter reloc_info_writer( 757979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org new_reloc->GetDataStartAddress() + padding, 0); 767979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org intptr_t comment_string 777979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org = reinterpret_cast<intptr_t>(RelocInfo::kFillerCommentString); 78c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com RelocInfo rinfo(0, RelocInfo::COMMENT, comment_string, NULL); 797979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org for (int i = 0; i < additional_comments; ++i) { 807979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org#ifdef DEBUG 817979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org byte* pos_before = reloc_info_writer.pos(); 827979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org#endif 837979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org reloc_info_writer.Write(&rinfo); 84e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(RelocInfo::kMinRelocCommentSize == 857979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org pos_before - reloc_info_writer.pos()); 867979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org } 877979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org // Replace relocation information on the code object. 887979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org code->set_relocation_info(*new_reloc); 897979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org } 907979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org} 917979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org 92a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 93fb732b17922ea75830be4db6b80534c4827d8a55jkummerow@chromium.orgvoid Deoptimizer::PatchCodeForDeoptimization(Isolate* isolate, Code* code) { 9483aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org Address code_start_address = code->instruction_start(); 95f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org 96f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org if (FLAG_zap_code_space) { 97f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org // Fail hard and early if we enter this code object again. 98f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org byte* pointer = code->FindCodeAgeSequence(); 99f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org if (pointer != NULL) { 100f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org pointer += kNoCodeAgeSequenceLength; 101f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org } else { 102f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org pointer = code->instruction_start(); 103f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org } 104f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org CodePatcher patcher(pointer, 1); 105f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org patcher.masm()->int3(); 106f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org 107f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org DeoptimizationInputData* data = 108f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 109f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org int osr_offset = data->OsrPcOffset()->value(); 110f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org if (osr_offset > 0) { 111f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org CodePatcher osr_patcher(code->instruction_start() + osr_offset, 1); 112f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org osr_patcher.masm()->int3(); 113f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org } 114f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org } 115f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org 11631b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org // We will overwrite the code's relocation info in-place. Relocation info 11783aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org // is written backward. The relocation info is the payload of a byte 11883aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org // array. Later on we will slide this to the start of the byte array and 11983aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org // create a filler object in the remaining space. 12031b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org ByteArray* reloc_info = code->relocation_info(); 12183aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org Address reloc_end_address = reloc_info->address() + reloc_info->Size(); 12283aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org RelocInfoWriter reloc_info_writer(reloc_end_address, code_start_address); 12383aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org 12427bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // Since the call is a relative encoding, write new 12583aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org // reloc info. We do not need any of the existing reloc info because the 12683aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org // existing code will not be used again (we zap it in debug builds). 12727bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // 12827bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // Emit call to lazy deoptimization at all lazy deopt points. 12927bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org DeoptimizationInputData* deopt_data = 13027bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org DeoptimizationInputData::cast(code->deoptimization_data()); 13127bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org#ifdef DEBUG 13227bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org Address prev_call_address = NULL; 13327bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org#endif 134f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org // For each LLazyBailout instruction insert a call to the corresponding 135f5a24546072ecdbbd6372c85c42157e01e913561titzer@chromium.org // deoptimization entry. 13627bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org for (int i = 0; i < deopt_data->DeoptCount(); i++) { 13727bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org if (deopt_data->Pc(i)->value() == -1) continue; 13827bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // Patch lazy deoptimization entry. 13927bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org Address call_address = code_start_address + deopt_data->Pc(i)->value(); 14027bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org CodePatcher patcher(call_address, patch_size()); 1418432c9102e4b2125d8eec741d35237cf23167471hpayer@chromium.org Address deopt_entry = GetDeoptimizationEntry(isolate, i, LAZY); 14259297c735ad2a41156ae9c723a39ff259ad061e0jkummerow@chromium.org patcher.masm()->call(deopt_entry, RelocInfo::NONE32); 14327bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org // We use RUNTIME_ENTRY for deoptimization bailouts. 14427bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org RelocInfo rinfo(call_address + 1, // 1 after the call opcode. 14527bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org RelocInfo::RUNTIME_ENTRY, 14627bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org reinterpret_cast<intptr_t>(deopt_entry), 14727bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org NULL); 14827bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org reloc_info_writer.Write(&rinfo); 149e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK_GE(reloc_info_writer.pos(), 15027bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org reloc_info->address() + ByteArray::kHeaderSize); 151e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(prev_call_address == NULL || 15227bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org call_address >= prev_call_address + patch_size()); 153e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(call_address + patch_size() <= code->instruction_end()); 15427bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org#ifdef DEBUG 15527bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org prev_call_address = call_address; 15627bf28851c1fa362a3f7c709871c21dcc9c23ce7ricow@chromium.org#endif 157a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 158a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 15931b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org // Move the relocation info to the beginning of the byte array. 16083aa54905e559090bea7771b83f188762cfcf082ricow@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); 16231b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org 16331b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org // The relocation info is in place, update the size. 16483aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org reloc_info->set_length(new_reloc_size); 16531b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org 16631b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org // Handle the junk part after the new relocation info. We will create 16731b1277ec3b8cd17acb01c66d85a456159072157kmillikin@chromium.org // a non-live object in the extra space at the end of the former reloc info. 16883aa54905e559090bea7771b83f188762cfcf082ricow@chromium.org Address junk_address = reloc_info->address() + reloc_info->Size(); 169e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(junk_address <= reloc_end_address); 1707979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org isolate->heap()->CreateFillerObjectAt(junk_address, 1717979bbb1df2eaff193e85d44c8da1ffa1525b7fcfschneider@chromium.org reloc_end_address - junk_address); 172a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org} 173a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 174a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 1754f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.orgvoid Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) { 1764f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org // Set the register values. The values are not important as there are no 1774f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org // callee saved registers in JavaScript frames, so all registers are 1784f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org // spilled. Registers ebp and esp are set to the correct values though. 1794f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org 1804f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org for (int i = 0; i < Register::kNumRegisters; i++) { 1814f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org input_->SetRegister(i, i * 4); 1824f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org } 1834f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org input_->SetRegister(esp.code(), reinterpret_cast<intptr_t>(frame->sp())); 1844f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org input_->SetRegister(ebp.code(), reinterpret_cast<intptr_t>(frame->fp())); 1851e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; i++) { 1864f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org input_->SetDoubleRegister(i, 0.0); 1874f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org } 1884f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org 1894f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org // Fill the frame content from the actual data on the frame. 1904f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org for (unsigned i = 0; i < input_->GetFrameSize(); i += kPointerSize) { 1914f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org input_->SetFrameSlot(i, Memory::uint32_at(tos + i)); 1924f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org } 1934f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org} 1944f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org 1954f693d6b99ffdbc05e5e211e08ed5039e13279d2ricow@chromium.org 1966e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.orgvoid Deoptimizer::SetPlatformCompiledStubRegisters( 197e20e19efeef112c26d0e63b1e5118e695b42d855machenbach@chromium.org FrameDescription* output_frame, CodeStubDescriptor* descriptor) { 1986e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org intptr_t handler = 19947390597afd6b17870f41dfb5dd8c057aea1f068machenbach@chromium.org reinterpret_cast<intptr_t>(descriptor->deoptimization_handler()); 2000cc095007a3ccded63f6577751c6a04300eb7ae9machenbach@chromium.org int params = descriptor->GetHandlerParameterCount(); 2016e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org output_frame->SetRegister(eax.code(), params); 2026e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org output_frame->SetRegister(ebx.code(), handler); 2036e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org} 2046e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org 2056e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org 2066e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.orgvoid Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) { 2071e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) { 2086e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org double double_value = input_->GetDoubleRegister(i); 2096e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org output_frame->SetDoubleRegister(i, double_value); 2106e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org } 2116e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org} 2126e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org 2136e196bfaf0e555d0c835390bb6ebc0a74484491dulan@chromium.org 2144e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.orgbool Deoptimizer::HasAlignmentPadding(JSFunction* function) { 2154e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org int parameter_count = function->shared()->formal_parameter_count() + 1; 2164e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org unsigned input_frame_size = input_->GetFrameSize(); 2174e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org unsigned alignment_state_offset = 2184e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org input_frame_size - parameter_count * kPointerSize - 2194e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org StandardFrameConstants::kFixedFrameSize - 2204e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org kPointerSize; 221e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(JavaScriptFrameConstants::kDynamicAlignmentStateOffset == 2224e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org JavaScriptFrameConstants::kLocal0Offset); 2234e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org int32_t alignment_state = input_->GetFrameSlot(alignment_state_offset); 2244e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org return (alignment_state == kAlignmentPaddingPushed); 2254e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org} 2264e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org 2274e308cf00936c6e7bead43e5141a04e37b49b9b5jkummerow@chromium.org 228a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org#define __ masm()-> 229a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 230a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.orgvoid Deoptimizer::EntryGenerator::Generate() { 231a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org GeneratePrologue(); 232a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 233a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Save all general purpose registers before messing with them. 234a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org const int kNumberOfRegisters = Register::kNumRegisters; 235a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 236a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org const int kDoubleRegsSize = kDoubleSize * 2371e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org XMMRegister::kMaxNumAllocatableRegisters; 238c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ sub(esp, Immediate(kDoubleRegsSize)); 2391e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) { 2403c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); 2413c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org int offset = i * kDoubleSize; 2423c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org __ movsd(Operand(esp, offset), xmm_reg); 243a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 244a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 245a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ pushad(); 246a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 247a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org const int kSavedRegistersAreaSize = kNumberOfRegisters * kPointerSize + 248a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org kDoubleRegsSize; 249a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 250a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Get the bailout id from the stack. 251a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(ebx, Operand(esp, kSavedRegistersAreaSize)); 252a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 253169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org // Get the address of the location in the code object 254a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // and compute the fp-to-sp delta in register edx. 255169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org __ mov(ecx, Operand(esp, kSavedRegistersAreaSize + 1 * kPointerSize)); 256169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org __ lea(edx, Operand(esp, kSavedRegistersAreaSize + 2 * kPointerSize)); 257169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org 258c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ sub(edx, ebp); 259a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ neg(edx); 260a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 261a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Allocate a new deoptimizer object. 262c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org __ PrepareCallCFunction(6, eax); 263a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); 264a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 0 * kPointerSize), eax); // Function. 265a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 1 * kPointerSize), Immediate(type())); // Bailout type. 266a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 2 * kPointerSize), ebx); // Bailout id. 267a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 3 * kPointerSize), ecx); // Code address or 0. 268a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 4 * kPointerSize), edx); // Fp-to-sp delta. 269c36ce6e8979bbbd43539f0a0effc87ea20dd65cckmillikin@chromium.org __ mov(Operand(esp, 5 * kPointerSize), 27032d7dbafe29be06cec1edd36c31fbe2865c799f4ulan@chromium.org Immediate(ExternalReference::isolate_address(isolate()))); 271c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com { 272c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com AllowExternalCallThatCantCauseGC scope(masm()); 27332d7dbafe29be06cec1edd36c31fbe2865c799f4ulan@chromium.org __ CallCFunction(ExternalReference::new_deoptimizer_function(isolate()), 6); 274c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 275a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 276a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Preserve deoptimizer object in register eax and get the input 277a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // frame descriptor pointer. 278a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(ebx, Operand(eax, Deoptimizer::input_offset())); 279a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 280a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Fill in the input registers. 2810ee099beef2c2b38743d657b84a30b626d9178ecager@chromium.org for (int i = kNumberOfRegisters - 1; i >= 0; i--) { 2820ee099beef2c2b38743d657b84a30b626d9178ecager@chromium.org int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 2830ee099beef2c2b38743d657b84a30b626d9178ecager@chromium.org __ pop(Operand(ebx, offset)); 284a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 285a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 286a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org int double_regs_offset = FrameDescription::double_registers_offset(); 2873c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org // Fill in the double input registers. 2881e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) { 2893c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org int dst_offset = i * kDoubleSize + double_regs_offset; 2903c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org int src_offset = i * kDoubleSize; 2913c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org __ movsd(xmm0, Operand(esp, src_offset)); 2923c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org __ movsd(Operand(ebx, dst_offset), xmm0); 293a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 29446a2a51ad190697e0f62c3060ce02a9de5820a07yangguo@chromium.org 295c03a1924dcc113678c0ebe58aa7d3c855a657719yangguo@chromium.org // Clear FPU all exceptions. 296c03a1924dcc113678c0ebe58aa7d3c855a657719yangguo@chromium.org // TODO(ulan): Find out why the TOP register is not zero here in some cases, 297c03a1924dcc113678c0ebe58aa7d3c855a657719yangguo@chromium.org // and check that the generated code never deoptimizes with unbalanced stack. 29846a2a51ad190697e0f62c3060ce02a9de5820a07yangguo@chromium.org __ fnclex(); 299a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 300169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org // Remove the bailout id, return address and the double registers. 301169691d93a961c8b511f8ac8fd8ee33d081ca10fdanno@chromium.org __ add(esp, Immediate(kDoubleRegsSize + 2 * kPointerSize)); 302a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 303a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Compute a pointer to the unwinding limit in register ecx; that is 304a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // the first stack slot not part of the input frame. 305a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(ecx, Operand(ebx, FrameDescription::frame_size_offset())); 306c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ add(ecx, esp); 307a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 308a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Unwind the stack down to - but not including - the unwinding 309a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // limit and copy the contents of the activation frame to the input 310a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // frame description. 311a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ lea(edx, Operand(ebx, FrameDescription::frame_content_offset())); 312a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org Label pop_loop_header; 313a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ jmp(&pop_loop_header); 314a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org Label pop_loop; 315a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ bind(&pop_loop); 316a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ pop(Operand(edx, 0)); 317c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ add(edx, Immediate(sizeof(uint32_t))); 318a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ bind(&pop_loop_header); 319c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ cmp(ecx, esp); 320a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ j(not_equal, &pop_loop); 321a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 322a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Compute the output frame in the deoptimizer. 323a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push(eax); 324a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ PrepareCallCFunction(1, ebx); 325a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(Operand(esp, 0 * kPointerSize), eax); 326c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com { 327c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com AllowExternalCallThatCantCauseGC scope(masm()); 328c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ CallCFunction( 32932d7dbafe29be06cec1edd36c31fbe2865c799f4ulan@chromium.org ExternalReference::compute_output_frames_function(isolate()), 1); 330c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com } 331a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ pop(eax); 332a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 333c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // If frame was dynamically aligned, pop padding. 334c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org Label no_padding; 335c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ cmp(Operand(eax, Deoptimizer::has_alignment_padding_offset()), 336c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org Immediate(0)); 337c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ j(equal, &no_padding); 338c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ pop(ecx); 339c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org if (FLAG_debug_code) { 340c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ cmp(ecx, Immediate(kAlignmentZapValue)); 341c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ Assert(equal, kAlignmentMarkerExpected); 3427028c05c1c71b9d5c5fe1bca01f2461d17a2dda7mmassi@chromium.org } 343c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ bind(&no_padding); 3447028c05c1c71b9d5c5fe1bca01f2461d17a2dda7mmassi@chromium.org 345a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Replace the current frame with the output frames. 346a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org Label outer_push_loop, inner_push_loop, 347a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org outer_loop_header, inner_loop_header; 348a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Outer loop state: eax = current FrameDescription**, edx = one past the 349a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // last FrameDescription**. 350a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(edx, Operand(eax, Deoptimizer::output_count_offset())); 351a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(eax, Operand(eax, Deoptimizer::output_offset())); 352a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ lea(edx, Operand(eax, edx, times_4, 0)); 353a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ jmp(&outer_loop_header); 354a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ bind(&outer_push_loop); 355a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Inner loop state: ebx = current FrameDescription*, ecx = loop index. 356a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(ebx, Operand(eax, 0)); 357a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ mov(ecx, Operand(ebx, FrameDescription::frame_size_offset())); 358a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ jmp(&inner_loop_header); 359a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ bind(&inner_push_loop); 360c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ sub(ecx, Immediate(sizeof(uint32_t))); 361a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push(Operand(ebx, ecx, times_1, FrameDescription::frame_content_offset())); 362a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ bind(&inner_loop_header); 363c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ test(ecx, ecx); 364a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ j(not_zero, &inner_push_loop); 365c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ add(eax, Immediate(kPointerSize)); 366a6bbcc801f63c451f814d6da77a1a48fba3d36c6yangguo@chromium.org __ bind(&outer_loop_header); 367c3b670ff19220959730d7886892bc4beb95d2ebaerik.corry@gmail.com __ cmp(eax, edx); 368a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ j(below, &outer_push_loop); 369a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 370c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org // In case of a failed STUB, we have to restore the XMM registers. 3711e4822ffed805d9cbb2a47cc9453aef06f3dfacamachenbach@chromium.org for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) { 3723c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); 3733c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org int src_offset = i * kDoubleSize + double_regs_offset; 3743c3c8d733702cb2b41471efa5eead1faf5b5711bmachenbach@chromium.org __ movsd(xmm_reg, Operand(ebx, src_offset)); 375a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 376a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 377a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Push state, pc, and continuation from the last output frame. 378c5d4971574b7a205fa0e788d8121dc79485e5e67hpayer@chromium.org __ push(Operand(ebx, FrameDescription::state_offset())); 379a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push(Operand(ebx, FrameDescription::pc_offset())); 380a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push(Operand(ebx, FrameDescription::continuation_offset())); 381a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 382a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 383a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Push the registers from the last output frame. 384a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org for (int i = 0; i < kNumberOfRegisters; i++) { 3850ee099beef2c2b38743d657b84a30b626d9178ecager@chromium.org int offset = (i * kPointerSize) + FrameDescription::registers_offset(); 386a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push(Operand(ebx, offset)); 387a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 388a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 389a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Restore the registers from the stack. 390a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ popad(); 391a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 392a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Return to the continuation point. 393a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ ret(0); 394a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org} 395a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 396a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 397a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.orgvoid Deoptimizer::TableEntryGenerator::GeneratePrologue() { 398a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org // Create a sequence of deoptimization entries. 399a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org Label done; 400a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org for (int i = 0; i < count(); i++) { 401a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org int start = masm()->pc_offset(); 402a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org USE(start); 403a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ push_imm32(i); 404a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ jmp(&done); 405e3c177a423baa3c30225c4e422b6f6c76d38b951machenbach@chromium.org DCHECK(masm()->pc_offset() - start == table_entry_size_); 406a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org } 407a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org __ bind(&done); 408a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org} 409a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 410c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org 411c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.orgvoid FrameDescription::SetCallerPc(unsigned offset, intptr_t value) { 412c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org SetFrameSlot(offset, value); 413c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org} 414c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org 415c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org 416c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.orgvoid FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { 417c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org SetFrameSlot(offset, value); 418c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org} 419c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org 420c73d55b355913690124f3ee70c344035431cdd3ayangguo@chromium.org 4216b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.orgvoid FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) { 4226b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org // No out-of-line constant pool support. 4236b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org UNREACHABLE(); 4246b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org} 4256b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 4266b6df382019a622ba20133e47bbe2e6f323b013bdslomov@chromium.org 427a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org#undef __ 428a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 429a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org 430a55512615f5adc085d23bc8589d155c4b579fb7bkasperl@chromium.org} } // namespace v8::internal 431c6c5718277d4047fad1e034396228ce15571b5a4sgjesse@chromium.org 432c6c5718277d4047fad1e034396228ce15571b5a4sgjesse@chromium.org#endif // V8_TARGET_ARCH_IA32 433