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/*
* 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 {
static constexpr size_t MAX_REGISTERS = 64;
RegsInfo(RegsImpl<AddressType>* regs) : regs(regs) {}
RegsImpl<AddressType>* regs = nullptr;
uint64_t saved_reg_map = 0;
AddressType saved_regs[MAX_REGISTERS];
inline AddressType Get(uint32_t reg) {
if (IsSaved(reg)) {
return saved_regs[reg];
}
return (*regs)[reg];
}
inline AddressType* Save(uint32_t reg) {
if (reg >= MAX_REGISTERS) {
// This should never happen since all currently supported
// architectures have < 64 total registers.
abort();
}
saved_reg_map |= 1ULL << reg;
saved_regs[reg] = (*regs)[reg];
return &(*regs)[reg];
}
inline bool IsSaved(uint32_t reg) {
if (reg > MAX_REGISTERS) {
// This should never happen since all currently supported
// architectures have < 64 total registers.
abort();
}
return saved_reg_map & (1ULL << reg);
}
inline uint16_t Total() { return regs->total_regs(); }
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_REGS_INFO_H
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