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