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