1b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith/* 2b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * Copyright (C) 2014 The Android Open Source Project 3b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * 4b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * Licensed under the Apache License, Version 2.0 (the "License"); 5b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * you may not use this file except in compliance with the License. 6b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * You may obtain a copy of the License at 7b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * 8b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * http://www.apache.org/licenses/LICENSE-2.0 9b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * 10b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * Unless required by applicable law or agreed to in writing, software 11b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * distributed under the License is distributed on an "AS IS" BASIS, 12b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * See the License for the specific language governing permissions and 14b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith * limitations under the License. 15b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith */ 16b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 17b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith#include <stdint.h> 18b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 19b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith#include "context_arm64.h" 20b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 217624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko#include "mirror/art_method-inl.h" 22b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith#include "mirror/object-inl.h" 237624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko#include "quick/quick_method_frame_info.h" 24b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith#include "stack.h" 25b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith#include "thread.h" 26b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 27b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 28b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithnamespace art { 29b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithnamespace arm64 { 30b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 310bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertzstatic constexpr uint64_t gZero = 0; 32b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 33b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithvoid Arm64Context::Reset() { 34b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith for (size_t i = 0; i < kNumberOfCoreRegisters; i++) { 350bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[i] = nullptr; 36b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 37b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith for (size_t i = 0; i < kNumberOfDRegisters; i++) { 380bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[i] = nullptr; 39b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 40b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith gprs_[SP] = &sp_; 41b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith gprs_[LR] = &pc_; 42b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith // Initialize registers with easy to spot debug values. 43b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith sp_ = Arm64Context::kBadGprBase + SP; 44b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith pc_ = Arm64Context::kBadGprBase + LR; 45b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} 46b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 47b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithvoid Arm64Context::FillCalleeSaves(const StackVisitor& fr) { 48b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith mirror::ArtMethod* method = fr.GetMethod(); 497624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko const QuickMethodFrameInfo frame_info = method->GetQuickFrameInfo(); 507624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko size_t spill_count = POPCOUNT(frame_info.CoreSpillMask()); 517624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko size_t fp_spill_count = POPCOUNT(frame_info.FpSpillMask()); 52b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith if (spill_count > 0) { 53b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith // Lowest number spill is farthest away, walk registers and fill into context. 54b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith int j = 1; 55b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith for (size_t i = 0; i < kNumberOfCoreRegisters; i++) { 567624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko if (((frame_info.CoreSpillMask() >> i) & 1) != 0) { 577624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko gprs_[i] = fr.CalleeSaveAddress(spill_count - j, frame_info.FrameSizeInBytes()); 58b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith j++; 59b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 60b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 61b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 62b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 63b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith if (fp_spill_count > 0) { 64b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith // Lowest number spill is farthest away, walk registers and fill into context. 65b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith int j = 1; 66b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith for (size_t i = 0; i < kNumberOfDRegisters; i++) { 677624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko if (((frame_info.FpSpillMask() >> i) & 1) != 0) { 687624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko fprs_[i] = fr.CalleeSaveAddress(spill_count + fp_spill_count - j, 697624d25dad2d1ba25969ae704fccf68649103ae5Vladimir Marko frame_info.FrameSizeInBytes()); 70b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith j++; 71b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 72b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 73b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 74b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} 75b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 760bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertzbool Arm64Context::SetGPR(uint32_t reg, uintptr_t value) { 77b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 78b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith DCHECK_NE(gprs_[reg], &gZero); // Can't overwrite this static value since they are never reset. 790bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz if (gprs_[reg] != nullptr) { 800bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz *gprs_[reg] = value; 810bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz return true; 820bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz } else { 830bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz return false; 840bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz } 850bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz} 860bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz 870bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertzbool Arm64Context::SetFPR(uint32_t reg, uintptr_t value) { 880bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters)); 890bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz DCHECK_NE(fprs_[reg], &gZero); // Can't overwrite this static value since they are never reset. 900bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz if (fprs_[reg] != nullptr) { 910bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz *fprs_[reg] = value; 920bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz return true; 930bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz } else { 940bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz return false; 950bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz } 96b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} 97b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 98b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithvoid Arm64Context::SmashCallerSaves() { 99b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith // This needs to be 0 because we want a null/zero return value. 100b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith gprs_[X0] = const_cast<uint64_t*>(&gZero); 1010bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X1] = nullptr; 1020bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X2] = nullptr; 1030bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X3] = nullptr; 1040bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X4] = nullptr; 1050bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X5] = nullptr; 1060bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X6] = nullptr; 1070bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X7] = nullptr; 1080bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X8] = nullptr; 1090bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X9] = nullptr; 1100bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X10] = nullptr; 1110bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X11] = nullptr; 1120bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X12] = nullptr; 1130bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X13] = nullptr; 1140bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X14] = nullptr; 1150bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs_[X15] = nullptr; 116b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 1176cf80102b5f308f2a5326869343ea0d19109a7fbAndreas Gampe // d0-d7, d16-d31 are caller-saved; d8-d15 are callee-saved. 1186cf80102b5f308f2a5326869343ea0d19109a7fbAndreas Gampe 1190bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D0] = nullptr; 1200bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D1] = nullptr; 1210bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D2] = nullptr; 1220bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D3] = nullptr; 1230bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D4] = nullptr; 1240bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D5] = nullptr; 1250bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D6] = nullptr; 1260bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D7] = nullptr; 1270bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz 1280bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D16] = nullptr; 1290bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D17] = nullptr; 1300bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D18] = nullptr; 1310bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D19] = nullptr; 1320bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D20] = nullptr; 1330bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D21] = nullptr; 1340bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D22] = nullptr; 1350bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D23] = nullptr; 1360bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D24] = nullptr; 1370bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D25] = nullptr; 1380bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D26] = nullptr; 1390bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D27] = nullptr; 1400bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D28] = nullptr; 1410bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D29] = nullptr; 1420bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D30] = nullptr; 1430bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs_[D31] = nullptr; 144b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} 145b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 146b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithextern "C" void art_quick_do_long_jump(uint64_t*, uint64_t*); 147b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 148b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteithvoid Arm64Context::DoLongJump() { 149b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith uint64_t gprs[32]; 1500bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz uint64_t fprs[kNumberOfDRegisters]; 151b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 152a3763283a564fc2b09fceb9af6a0c743ea75b1dcAndreas Gampe // Do not use kNumberOfCoreRegisters, as this is with the distinction of SP and XZR 153a3763283a564fc2b09fceb9af6a0c743ea75b1dcAndreas Gampe for (size_t i = 0; i < 32; ++i) { 1540bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz gprs[i] = gprs_[i] != nullptr ? *gprs_[i] : Arm64Context::kBadGprBase + i; 155b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 156b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith for (size_t i = 0; i < kNumberOfDRegisters; ++i) { 1570bcb2902ec21393d71c94e63aa6733cb5311a0ccSebastien Hertz fprs[i] = fprs_[i] != nullptr ? *fprs_[i] : Arm64Context::kBadGprBase + i; 158b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith } 159b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith DCHECK_EQ(reinterpret_cast<uintptr_t>(Thread::Current()), gprs[TR]); 160b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith art_quick_do_long_jump(gprs, fprs); 161b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} 162b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith 163b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} // namespace arm64 164b95a5345ae4217b70ca36f0cced92f68dda7caf5Stuart Monteith} // namespace art 165