2210c85a66
Code in plugins-nextgen reading ELF files is currently hard-coded to assume a 64-bit little-endian ELF format. Unfortunately, this assumption is even embedded in the interface between GlobalHandler and Utils/ELF routines, which use ELF64LE types. To fix this, I've refactored the interface to use generic types, in particular by using (a unique_ptr to) ObjectFile instead of ELF64LEObjectFile, and ELFSymbolRef instead of ELF64LE::Sym. This allows properly templating over multiple ELF format variants inside Utils/ELF; specifically, this patch adds support for 64-bit big-endian ELF files in addition to 64-bit little-endian files.
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
//===-- Utils/ELF.h - Common ELF functionality ------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Common ELF functionality for target plugins.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OPENMP_LIBOMPTARGET_PLUGINS_ELF_UTILS_H
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#define LLVM_OPENMP_LIBOMPTARGET_PLUGINS_ELF_UTILS_H
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#include "Shared/PluginAPI.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ELFObjectFile.h"
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namespace utils {
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namespace elf {
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/// Returns true or false if the \p Buffer is an ELF file.
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bool isELF(llvm::StringRef Buffer);
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/// Checks if the given \p Object is a valid ELF matching the e_machine value.
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llvm::Expected<bool> checkMachine(llvm::StringRef Object, uint16_t EMachine);
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/// Returns a pointer to the given \p Symbol inside of an ELF object.
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llvm::Expected<const void *>
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getSymbolAddress(const llvm::object::ELFSymbolRef &Symbol);
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/// Returns the symbol associated with the \p Name in the \p ELFObj. It will
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/// first search for the hash sections to identify symbols from the hash table.
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/// If that fails it will fall back to a linear search in the case of an
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/// executable file without a hash table.
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llvm::Expected<std::optional<llvm::object::ELFSymbolRef>>
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getSymbol(const llvm::object::ObjectFile &ELFObj, llvm::StringRef Name);
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} // namespace elf
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} // namespace utils
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#endif // LLVM_OPENMP_LIBOMPTARGET_PLUGINS_ELF_UTILS_H
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