1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_ 18 #define ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_ 19 20 #include "arch/instruction_set.h" 21 #include "base/bit_utils.h" 22 #include "base/callee_save_type.h" 23 #include "base/enums.h" 24 #include "quick/quick_method_frame_info.h" 25 #include "registers_arm64.h" 26 #include "runtime_globals.h" 27 28 namespace art { 29 namespace arm64 { 30 31 // Registers need to be restored but not preserved by aapcs64. 32 static constexpr uint32_t kArm64CalleeSaveAlwaysSpills = 33 // Note: ArtMethod::GetReturnPcOffsetInBytes() rely on the assumption that 34 // LR is always saved on the top of the frame for all targets. 35 // That is, lr = *(sp + framesize - pointer_size). 36 (1 << art::arm64::LR); 37 // Callee saved registers 38 static constexpr uint32_t kArm64CalleeSaveRefSpills = 39 (1 << art::arm64::X20) | (1 << art::arm64::X21) | (1 << art::arm64::X22) | 40 (1 << art::arm64::X23) | (1 << art::arm64::X24) | (1 << art::arm64::X25) | 41 (1 << art::arm64::X26) | (1 << art::arm64::X27) | (1 << art::arm64::X28) | 42 (1 << art::arm64::X29); 43 // X0 is the method pointer. Not saved. 44 static constexpr uint32_t kArm64CalleeSaveArgSpills = 45 (1 << art::arm64::X1) | (1 << art::arm64::X2) | (1 << art::arm64::X3) | 46 (1 << art::arm64::X4) | (1 << art::arm64::X5) | (1 << art::arm64::X6) | 47 (1 << art::arm64::X7); 48 static constexpr uint32_t kArm64CalleeSaveAllSpills = 49 (1 << art::arm64::X19); 50 static constexpr uint32_t kArm64CalleeSaveEverythingSpills = 51 (1 << art::arm64::X0) | (1 << art::arm64::X1) | (1 << art::arm64::X2) | 52 (1 << art::arm64::X3) | (1 << art::arm64::X4) | (1 << art::arm64::X5) | 53 (1 << art::arm64::X6) | (1 << art::arm64::X7) | (1 << art::arm64::X8) | 54 (1 << art::arm64::X9) | (1 << art::arm64::X10) | (1 << art::arm64::X11) | 55 (1 << art::arm64::X12) | (1 << art::arm64::X13) | (1 << art::arm64::X14) | 56 (1 << art::arm64::X15) | (1 << art::arm64::X16) | (1 << art::arm64::X17) | 57 (1 << art::arm64::X19); 58 59 static constexpr uint32_t kArm64CalleeSaveFpAlwaysSpills = 0; 60 static constexpr uint32_t kArm64CalleeSaveFpRefSpills = 0; 61 static constexpr uint32_t kArm64CalleeSaveFpArgSpills = 62 (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) | 63 (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) | 64 (1 << art::arm64::D6) | (1 << art::arm64::D7); 65 static constexpr uint32_t kArm64CalleeSaveFpAllSpills = 66 (1 << art::arm64::D8) | (1 << art::arm64::D9) | (1 << art::arm64::D10) | 67 (1 << art::arm64::D11) | (1 << art::arm64::D12) | (1 << art::arm64::D13) | 68 (1 << art::arm64::D14) | (1 << art::arm64::D15); 69 static constexpr uint32_t kArm64CalleeSaveFpEverythingSpills = 70 (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) | 71 (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) | 72 (1 << art::arm64::D6) | (1 << art::arm64::D7) | (1 << art::arm64::D8) | 73 (1 << art::arm64::D9) | (1 << art::arm64::D10) | (1 << art::arm64::D11) | 74 (1 << art::arm64::D12) | (1 << art::arm64::D13) | (1 << art::arm64::D14) | 75 (1 << art::arm64::D15) | (1 << art::arm64::D16) | (1 << art::arm64::D17) | 76 (1 << art::arm64::D18) | (1 << art::arm64::D19) | (1 << art::arm64::D20) | 77 (1 << art::arm64::D21) | (1 << art::arm64::D22) | (1 << art::arm64::D23) | 78 (1 << art::arm64::D24) | (1 << art::arm64::D25) | (1 << art::arm64::D26) | 79 (1 << art::arm64::D27) | (1 << art::arm64::D28) | (1 << art::arm64::D29) | 80 (1 << art::arm64::D30) | (1 << art::arm64::D31); 81 82 class Arm64CalleeSaveFrame { 83 public: GetCoreSpills(CalleeSaveType type)84 static constexpr uint32_t GetCoreSpills(CalleeSaveType type) { 85 type = GetCanonicalCalleeSaveType(type); 86 return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills | 87 (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) | 88 (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveAllSpills : 0) | 89 (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveEverythingSpills : 0); 90 } 91 GetFpSpills(CalleeSaveType type)92 static constexpr uint32_t GetFpSpills(CalleeSaveType type) { 93 type = GetCanonicalCalleeSaveType(type); 94 return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills | 95 (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveFpArgSpills : 0) | 96 (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveFpAllSpills : 0) | 97 (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveFpEverythingSpills : 0); 98 } 99 GetFrameSize(CalleeSaveType type)100 static constexpr uint32_t GetFrameSize(CalleeSaveType type) { 101 type = GetCanonicalCalleeSaveType(type); 102 return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ + 103 POPCOUNT(GetFpSpills(type)) /* fprs */ + 104 1 /* Method* */) * static_cast<size_t>(kArm64PointerSize), kStackAlignment); 105 } 106 GetMethodFrameInfo(CalleeSaveType type)107 static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) { 108 type = GetCanonicalCalleeSaveType(type); 109 return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type)); 110 } 111 GetFpr1Offset(CalleeSaveType type)112 static constexpr size_t GetFpr1Offset(CalleeSaveType type) { 113 type = GetCanonicalCalleeSaveType(type); 114 return GetFrameSize(type) - 115 (POPCOUNT(GetCoreSpills(type)) + 116 POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kArm64PointerSize); 117 } 118 GetGpr1Offset(CalleeSaveType type)119 static constexpr size_t GetGpr1Offset(CalleeSaveType type) { 120 type = GetCanonicalCalleeSaveType(type); 121 return GetFrameSize(type) - 122 POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kArm64PointerSize); 123 } 124 GetReturnPcOffset(CalleeSaveType type)125 static constexpr size_t GetReturnPcOffset(CalleeSaveType type) { 126 type = GetCanonicalCalleeSaveType(type); 127 return GetFrameSize(type) - static_cast<size_t>(kArm64PointerSize); 128 } 129 }; 130 131 } // namespace arm64 132 } // namespace art 133 134 #endif // ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_ 135