7bda84d25e
Previously, ELFReader takes three template arguments: EFLT, LinkingContextT and FileT. FileT is itself templated. So it was a bit complicated. Maybe too much. Most architectures don't actually need to be parameterized for ELFT. For example, x86 is always ELF32LE and x86-64 is ELF64LE. However, because ELFReader requires a ELFT argument, we needed to parameterize a class even if not needed. This patch removes the parameter from the class. So now we can de-templatize such classes (I didn't do that in this patch, though). This patch also removes ContextT parameter since it didn't have to be passed as a template argument. llvm-svn: 234853
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===- lib/ReaderWriter/ELF/FileCommon.h ----------------------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_READER_WRITER_ELF_FILE_COMMON_H
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#define LLD_READER_WRITER_ELF_FILE_COMMON_H
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#include "lld/ReaderWriter/ELFLinkingContext.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/ELF.h"
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namespace lld {
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namespace elf {
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template <class ELFT>
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std::error_code checkCompatibility(unsigned char size, unsigned char endian);
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template <typename ELFT>
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std::error_code isCompatible(const MemoryBuffer &mb, ELFLinkingContext &ctx) {
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typedef llvm::object::Elf_Ehdr_Impl<ELFT> Elf_Ehdr;
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if (uintptr_t(mb.getBufferStart()) & 1)
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return make_dynamic_error_code("invalid alignment");
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auto *hdr = reinterpret_cast<const Elf_Ehdr *>(mb.getBuffer().data());
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if (hdr->e_machine != ctx.getMachineType())
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return make_dynamic_error_code("incompatible machine type");
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unsigned char size;
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unsigned char endian;
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std::tie(size, endian) = llvm::object::getElfArchType(mb.getBuffer());
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if (std::error_code ec = checkCompatibility<ELFT>(size, endian))
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return ec;
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if (auto ec = ctx.mergeHeaderFlags(hdr->getFileClass(), hdr->e_flags))
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return ec;
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return std::error_code();
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}
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} // end namespace elf
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} // end namespace lld
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#endif
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