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_QUICK_METHOD_FRAME_INFO_ARM64_H_ 18 #define ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_ 19 20 #include "quick/quick_method_frame_info.h" 21 #include "registers_arm64.h" 22 #include "runtime.h" // for Runtime::CalleeSaveType. 23 #include "utils.h" // for POPCOUNT 24 25 namespace art { 26 namespace arm64 { 27 28 // Registers need to be restored but not preserved by aapcs64. 29 static constexpr uint32_t kArm64CalleeSaveAlwaysSpills = 30 // Note: ArtMethod::GetReturnPcOffsetInBytes() rely on the assumption that 31 // LR is always saved on the top of the frame for all targets. 32 // That is, lr = *(sp + framesize - pointsize). 33 (1 << art::arm64::LR); 34 // Callee saved registers 35 static constexpr uint32_t kArm64CalleeSaveRefSpills = 36 (1 << art::arm64::X20) | (1 << art::arm64::X21) | (1 << art::arm64::X22) | 37 (1 << art::arm64::X23) | (1 << art::arm64::X24) | (1 << art::arm64::X25) | 38 (1 << art::arm64::X26) | (1 << art::arm64::X27) | (1 << art::arm64::X28) | 39 (1 << art::arm64::X29); 40 // X0 is the method pointer. Not saved. 41 static constexpr uint32_t kArm64CalleeSaveArgSpills = 42 (1 << art::arm64::X1) | (1 << art::arm64::X2) | (1 << art::arm64::X3) | 43 (1 << art::arm64::X4) | (1 << art::arm64::X5) | (1 << art::arm64::X6) | 44 (1 << art::arm64::X7); 45 static constexpr uint32_t kArm64CalleeSaveAllSpills = 46 // Thread register. 47 (1 << art::arm64::X18) | 48 // Suspend register. 49 1 << art::arm64::X19; 50 51 static constexpr uint32_t kArm64CalleeSaveFpAlwaysSpills = 0; 52 static constexpr uint32_t kArm64CalleeSaveFpRefSpills = 0; 53 static constexpr uint32_t kArm64CalleeSaveFpArgSpills = 54 (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) | 55 (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) | 56 (1 << art::arm64::D6) | (1 << art::arm64::D7); 57 static constexpr uint32_t kArm64FpAllSpills = 58 (1 << art::arm64::D8) | (1 << art::arm64::D9) | (1 << art::arm64::D10) | 59 (1 << art::arm64::D11) | (1 << art::arm64::D12) | (1 << art::arm64::D13) | 60 (1 << art::arm64::D14) | (1 << art::arm64::D15); 61 62 constexpr uint32_t Arm64CalleeSaveCoreSpills(Runtime::CalleeSaveType type) { 63 return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills | 64 (type == Runtime::kRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) | 65 (type == Runtime::kSaveAll ? kArm64CalleeSaveAllSpills : 0); 66 } 67 68 constexpr uint32_t Arm64CalleeSaveFpSpills(Runtime::CalleeSaveType type) { 69 return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills | 70 (type == Runtime::kRefsAndArgs ? kArm64CalleeSaveFpArgSpills: 0) | 71 (type == Runtime::kSaveAll ? kArm64FpAllSpills : 0); 72 } 73 74 constexpr uint32_t Arm64CalleeSaveFrameSize(Runtime::CalleeSaveType type) { 75 return RoundUp((POPCOUNT(Arm64CalleeSaveCoreSpills(type)) /* gprs */ + 76 POPCOUNT(Arm64CalleeSaveFpSpills(type)) /* fprs */ + 77 1 /* Method* */) * kArm64PointerSize, kStackAlignment); 78 } 79 80 constexpr QuickMethodFrameInfo Arm64CalleeSaveMethodFrameInfo(Runtime::CalleeSaveType type) { 81 return QuickMethodFrameInfo(Arm64CalleeSaveFrameSize(type), 82 Arm64CalleeSaveCoreSpills(type), 83 Arm64CalleeSaveFpSpills(type)); 84 } 85 86 constexpr size_t Arm64CalleeSaveFpr1Offset(Runtime::CalleeSaveType type) { 87 return Arm64CalleeSaveFrameSize(type) - 88 (POPCOUNT(Arm64CalleeSaveCoreSpills(type)) + 89 POPCOUNT(Arm64CalleeSaveFpSpills(type))) * kArm64PointerSize; 90 } 91 92 constexpr size_t Arm64CalleeSaveGpr1Offset(Runtime::CalleeSaveType type) { 93 return Arm64CalleeSaveFrameSize(type) - 94 POPCOUNT(Arm64CalleeSaveCoreSpills(type)) * kArm64PointerSize; 95 } 96 97 constexpr size_t Arm64CalleeSaveLrOffset(Runtime::CalleeSaveType type) { 98 return Arm64CalleeSaveFrameSize(type) - 99 POPCOUNT(Arm64CalleeSaveCoreSpills(type) & (-(1 << LR))) * kArm64PointerSize; 100 } 101 102 } // namespace arm64 103 } // namespace art 104 105 #endif // ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_ 106