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/*
* Copyright (C) 2016 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.
*/
#pragma once
#include <elf.h>
#include <stdint.h>
#include <iterator>
#include <unordered_map>
#include <unwindstack/ElfInterface.h>
#include <unwindstack/Memory.h>
namespace unwindstack {
class ElfInterfaceArm : public ElfInterface32 {
public:
ElfInterfaceArm(Memory* memory) : ElfInterface32(memory) {}
virtual ~ElfInterfaceArm() = default;
class iterator : public std::iterator<std::bidirectional_iterator_tag, uint32_t> {
public:
iterator(ElfInterfaceArm* interface, size_t index) : interface_(interface), index_(index) { }
iterator& operator++() { index_++; return *this; }
iterator& operator++(int increment) { index_ += increment; return *this; }
iterator& operator--() { index_--; return *this; }
iterator& operator--(int decrement) { index_ -= decrement; return *this; }
bool operator==(const iterator& rhs) { return this->index_ == rhs.index_; }
bool operator!=(const iterator& rhs) { return this->index_ != rhs.index_; }
uint32_t operator*() {
uint32_t addr = interface_->addrs_[index_];
if (addr == 0) {
if (!interface_->GetPrel31Addr(interface_->start_offset_ + index_ * 8, &addr)) {
return 0;
}
interface_->addrs_[index_] = addr;
}
return addr;
}
private:
ElfInterfaceArm* interface_ = nullptr;
size_t index_ = 0;
};
iterator begin() { return iterator(this, 0); }
iterator end() { return iterator(this, total_entries_); }
bool Init(int64_t* section_bias) override;
bool GetPrel31Addr(uint32_t offset, uint32_t* addr);
bool FindEntry(uint32_t pc, uint64_t* entry_offset);
void HandleUnknownType(uint32_t type, uint64_t ph_offset, uint64_t ph_filesz) override;
bool Step(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished,
bool* is_signal_frame) override;
bool StepExidx(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished);
bool GetFunctionName(uint64_t addr, SharedString* name, uint64_t* offset) override;
uint64_t start_offset() { return start_offset_; }
size_t total_entries() { return total_entries_; }
void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
protected:
uint64_t start_offset_ = 0;
size_t total_entries_ = 0;
uint64_t load_bias_ = 0;
std::unordered_map<size_t, uint32_t> addrs_;
};
} // namespace unwindstack
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