1559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris/* 2559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * Copyright (C) 2018 The Android Open Source Project 3559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * 4559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * Licensed under the Apache License, Version 2.0 (the "License"); 5559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * you may not use this file except in compliance with the License. 6559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * You may obtain a copy of the License at 7559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * 8559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * http://www.apache.org/licenses/LICENSE-2.0 9559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * 10559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * Unless required by applicable law or agreed to in writing, software 11559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * distributed under the License is distributed on an "AS IS" BASIS, 12559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * See the License for the specific language governing permissions and 14559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris * limitations under the License. 15559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris */ 16559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 17559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris#ifndef _LIBUNWINDSTACK_REGS_INFO_H 18559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris#define _LIBUNWINDSTACK_REGS_INFO_H 19559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 20559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris#include <stdint.h> 21559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 22559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris#include <unwindstack/Regs.h> 23559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 24559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferrisnamespace unwindstack { 25559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 26559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferristemplate <typename AddressType> 27559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferrisstruct RegsInfo { 28559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris RegsInfo(RegsImpl<AddressType>* regs) : regs(regs) {} 29559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 30559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris RegsImpl<AddressType>* regs = nullptr; 31559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris uint64_t saved_reg_map = 0; 32559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris AddressType saved_regs[64]; 33559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 34559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris inline AddressType Get(uint32_t reg) { 35559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris if (IsSaved(reg)) { 36559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris return saved_regs[reg]; 37559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 38559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris return (*regs)[reg]; 39559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 40559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 41559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris inline AddressType* Save(uint32_t reg) { 42559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris if (reg > sizeof(saved_regs) / sizeof(AddressType)) { 43559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris // This should never happen as since all currently supported 44559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris // architectures have the total number of registers < 64. 45559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris abort(); 46559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 47559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris saved_reg_map |= 1 << reg; 48559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris saved_regs[reg] = (*regs)[reg]; 49559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris return &(*regs)[reg]; 50559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 51559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 52559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris inline bool IsSaved(uint32_t reg) { 53559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris if (reg > sizeof(saved_regs) / sizeof(AddressType)) { 54559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris // This should never happen as since all currently supported 55559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris // architectures have the total number of registers < 64. 56559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris abort(); 57559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 58559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris return saved_reg_map & (1 << reg); 59559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris } 60559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 61559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris inline uint16_t Total() { return regs->total_regs(); } 62559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris}; 63559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 64559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris} // namespace unwindstack 65559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris 66559c7f209295a7070515bba9fa3985edf53d13a0Christopher Ferris#endif // _LIBUNWINDSTACK_REGS_INFO_H 67