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/*
* Copyright (C) 2020 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 SIMPLE_PERF_KALLSYMS_H_
#define SIMPLE_PERF_KALLSYMS_H_
#include <string>
#include "environment.h"
namespace simpleperf {
struct KernelSymbol {
uint64_t addr;
char type;
const char* name;
const char* module; // If nullptr, the symbol is not in a kernel module.
};
// Parses symbol_data as the content of /proc/kallsyms, calling the callback for
// each symbol that is found. Stops the parsing if the callback returns true.
bool ProcessKernelSymbols(std::string& symbol_data,
const std::function<bool(const KernelSymbol&)>& callback);
#if defined(__linux__)
// Returns the list of currently loaded kernel modules.
std::vector<KernelMmap> GetLoadedModules();
// Returns the start address of the kernel. It uses /proc/kallsyms to find this
// address. Returns 0 if unknown.
uint64_t GetKernelStartAddress();
// Loads the /proc/kallsyms file, requesting access if required. The value of
// kptr_restrict might be modified during the process. Its original value will
// be restored. This usually requires root privileges.
bool LoadKernelSymbols(std::string* kallsyms);
// only for testing
void ResetKernelAddressWarning();
#endif // defined(__linux__)
} // namespace simpleperf
#endif // SIMPLE_PERF_KALLSYMS_H_
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