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66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Copyright 2019 Google LLC
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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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#ifndef SANDBOXED_API_SANDBOX2_UTIL_MINIELF_H_
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#define SANDBOXED_API_SANDBOX2_UTIL_MINIELF_H_
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#include <cstdio>
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#include <memory>
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#include <string>
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#include <vector>
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#include "absl/status/statusor.h"
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namespace sandbox2 {
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// Minimal implementation of an ELF file parser to read the program interpreter.
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// Only understands 64-bit ELFs.
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class ElfFile {
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public:
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struct Symbol {
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uint64_t address;
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std::string name;
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};
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static absl::StatusOr<ElfFile> ParseFromFile(const std::string& filename,
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uint32_t features);
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int64_t file_size() const { return file_size_; }
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const std::string& interpreter() const { return interpreter_; }
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const std::vector<Symbol> symbols() const { return symbols_; }
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const std::vector<std::string> imported_libraries() const {
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return imported_libraries_;
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}
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bool position_independent() const { return position_independent_; }
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static constexpr uint32_t kGetInterpreter = 1 << 0;
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static constexpr uint32_t kLoadSymbols = 1 << 1;
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static constexpr uint32_t kLoadImportedLibraries = 1 << 2;
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static constexpr uint32_t kAll =
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kGetInterpreter | kLoadSymbols | kLoadImportedLibraries;
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private:
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friend class ElfParser;
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bool position_independent_;
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int64_t file_size_ = 0;
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std::string interpreter_;
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std::vector<Symbol> symbols_;
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std::vector<std::string> imported_libraries_;
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};
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} // namespace sandbox2
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#endif // SANDBOXED_API_SANDBOX2_UTIL_MINIELF_H_
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