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/macros.h" 24 #include "base/pointer_size.h" 25 #include "quick/quick_method_frame_info.h" 26 #include "registers_arm64.h" 27 #include "runtime_globals.h" 28 29 namespace art HIDDEN { 30 namespace arm64 { 31 32 // Registers need to be restored but not preserved by aapcs64. 33 static constexpr uint32_t kArm64CalleeSaveAlwaysSpills = 34 // Note: ArtMethod::GetReturnPcOffsetInBytes() rely on the assumption that 35 // LR is always saved on the top of the frame for all targets. 36 // That is, lr = *(sp + framesize - pointer_size). 37 (1 << art::arm64::LR); 38 // Callee saved registers 39 static constexpr uint32_t kArm64CalleeSaveRefSpills = 40 (1 << art::arm64::X20) | (1 << art::arm64::X21) | (1 << art::arm64::X22) | 41 (1 << art::arm64::X23) | (1 << art::arm64::X24) | (1 << art::arm64::X25) | 42 (1 << art::arm64::X26) | (1 << art::arm64::X27) | (1 << art::arm64::X28) | 43 (1 << art::arm64::X29); 44 // X0 is the method pointer. Not saved. 45 static constexpr uint32_t kArm64CalleeSaveArgSpills = 46 (1 << art::arm64::X1) | (1 << art::arm64::X2) | (1 << art::arm64::X3) | 47 (1 << art::arm64::X4) | (1 << art::arm64::X5) | (1 << art::arm64::X6) | 48 (1 << art::arm64::X7); 49 static constexpr uint32_t kArm64CalleeSaveAllSpills = 50 (1 << art::arm64::X19); 51 static constexpr uint32_t kArm64CalleeSaveEverythingSpills = 52 (1 << art::arm64::X0) | (1 << art::arm64::X1) | (1 << art::arm64::X2) | 53 (1 << art::arm64::X3) | (1 << art::arm64::X4) | (1 << art::arm64::X5) | 54 (1 << art::arm64::X6) | (1 << art::arm64::X7) | (1 << art::arm64::X8) | 55 (1 << art::arm64::X9) | (1 << art::arm64::X10) | (1 << art::arm64::X11) | 56 (1 << art::arm64::X12) | (1 << art::arm64::X13) | (1 << art::arm64::X14) | 57 (1 << art::arm64::X15) | (1 << art::arm64::X16) | (1 << art::arm64::X17) | 58 (1 << art::arm64::X19); 59 60 static constexpr uint32_t kArm64CalleeSaveFpAlwaysSpills = 0; 61 static constexpr uint32_t kArm64CalleeSaveFpRefSpills = 0; 62 static constexpr uint32_t kArm64CalleeSaveFpArgSpills = 63 (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) | 64 (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) | 65 (1 << art::arm64::D6) | (1 << art::arm64::D7); 66 static constexpr uint32_t kArm64CalleeSaveFpAllSpills = 67 (1 << art::arm64::D8) | (1 << art::arm64::D9) | (1 << art::arm64::D10) | 68 (1 << art::arm64::D11) | (1 << art::arm64::D12) | (1 << art::arm64::D13) | 69 (1 << art::arm64::D14) | (1 << art::arm64::D15); 70 static constexpr uint32_t kArm64CalleeSaveFpEverythingSpills = 71 (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) | 72 (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) | 73 (1 << art::arm64::D6) | (1 << art::arm64::D7) | (1 << art::arm64::D8) | 74 (1 << art::arm64::D9) | (1 << art::arm64::D10) | (1 << art::arm64::D11) | 75 (1 << art::arm64::D12) | (1 << art::arm64::D13) | (1 << art::arm64::D14) | 76 (1 << art::arm64::D15) | (1 << art::arm64::D16) | (1 << art::arm64::D17) | 77 (1 << art::arm64::D18) | (1 << art::arm64::D19) | (1 << art::arm64::D20) | 78 (1 << art::arm64::D21) | (1 << art::arm64::D22) | (1 << art::arm64::D23) | 79 (1 << art::arm64::D24) | (1 << art::arm64::D25) | (1 << art::arm64::D26) | 80 (1 << art::arm64::D27) | (1 << art::arm64::D28) | (1 << art::arm64::D29) | 81 (1 << art::arm64::D30) | (1 << art::arm64::D31); 82 83 class Arm64CalleeSaveFrame { 84 public: GetCoreSpills(CalleeSaveType type)85 static constexpr uint32_t GetCoreSpills(CalleeSaveType type) { 86 type = GetCanonicalCalleeSaveType(type); 87 return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills | 88 (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) | 89 (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveAllSpills : 0) | 90 (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveEverythingSpills : 0); 91 } 92 GetFpSpills(CalleeSaveType type)93 static constexpr uint32_t GetFpSpills(CalleeSaveType type) { 94 type = GetCanonicalCalleeSaveType(type); 95 return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills | 96 (type == CalleeSaveType::kSaveRefsAndArgs ? kArm64CalleeSaveFpArgSpills : 0) | 97 (type == CalleeSaveType::kSaveAllCalleeSaves ? kArm64CalleeSaveFpAllSpills : 0) | 98 (type == CalleeSaveType::kSaveEverything ? kArm64CalleeSaveFpEverythingSpills : 0); 99 } 100 GetFrameSize(CalleeSaveType type)101 static constexpr uint32_t GetFrameSize(CalleeSaveType type) { 102 type = GetCanonicalCalleeSaveType(type); 103 return RoundUp((POPCOUNT(GetCoreSpills(type)) /* gprs */ + 104 POPCOUNT(GetFpSpills(type)) /* fprs */ + 105 1 /* Method* */) * static_cast<size_t>(kArm64PointerSize), kStackAlignment); 106 } 107 GetMethodFrameInfo(CalleeSaveType type)108 static constexpr QuickMethodFrameInfo GetMethodFrameInfo(CalleeSaveType type) { 109 type = GetCanonicalCalleeSaveType(type); 110 return QuickMethodFrameInfo(GetFrameSize(type), GetCoreSpills(type), GetFpSpills(type)); 111 } 112 GetFpr1Offset(CalleeSaveType type)113 static constexpr size_t GetFpr1Offset(CalleeSaveType type) { 114 type = GetCanonicalCalleeSaveType(type); 115 return GetFrameSize(type) - 116 (POPCOUNT(GetCoreSpills(type)) + 117 POPCOUNT(GetFpSpills(type))) * static_cast<size_t>(kArm64PointerSize); 118 } 119 GetGpr1Offset(CalleeSaveType type)120 static constexpr size_t GetGpr1Offset(CalleeSaveType type) { 121 type = GetCanonicalCalleeSaveType(type); 122 return GetFrameSize(type) - 123 POPCOUNT(GetCoreSpills(type)) * static_cast<size_t>(kArm64PointerSize); 124 } 125 GetReturnPcOffset(CalleeSaveType type)126 static constexpr size_t GetReturnPcOffset(CalleeSaveType type) { 127 type = GetCanonicalCalleeSaveType(type); 128 return GetFrameSize(type) - static_cast<size_t>(kArm64PointerSize); 129 } 130 }; 131 132 } // namespace arm64 133 } // namespace art 134 135 #endif // ART_RUNTIME_ARCH_ARM64_CALLEE_SAVE_FRAME_ARM64_H_ 136