/* * Copyright (C) 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef _LIBUNWINDSTACK_REGS_INFO_H #define _LIBUNWINDSTACK_REGS_INFO_H #include <stdint.h> #include <unwindstack/Regs.h> namespace unwindstack { template <typename AddressType> struct RegsInfo { RegsInfo(RegsImpl<AddressType>* regs) : regs(regs) {} RegsImpl<AddressType>* regs = nullptr; uint64_t saved_reg_map = 0; AddressType saved_regs[64]; inline AddressType Get(uint32_t reg) { if (IsSaved(reg)) { return saved_regs[reg]; } return (*regs)[reg]; } inline AddressType* Save(uint32_t reg) { if (reg > sizeof(saved_regs) / sizeof(AddressType)) { // This should never happen as since all currently supported // architectures have the total number of registers < 64. abort(); } saved_reg_map |= 1 << reg; saved_regs[reg] = (*regs)[reg]; return &(*regs)[reg]; } inline bool IsSaved(uint32_t reg) { if (reg > sizeof(saved_regs) / sizeof(AddressType)) { // This should never happen as since all currently supported // architectures have the total number of registers < 64. abort(); } return saved_reg_map & (1 << reg); } inline uint16_t Total() { return regs->total_regs(); } }; } // namespace unwindstack #endif // _LIBUNWINDSTACK_REGS_INFO_H