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[Object][ELF] Simplify ELFObjectFile by using ELFType.

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This simplifies the usage and implementation of ELFObjectFile by using ELFType
to replace:

<endianness target_endianness, std::size_t max_alignment, bool is64Bits>

This does complicate the base ELF types as they must now use template template
parameters to partially specialize for the 32 and 64bit cases. However these
are only defined once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172515 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer
2013-01-15 07:44:25 +00:00
parent b5f8cd5bb0
commit ac97f5ce48
4 changed files with 475 additions and 549 deletions
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16
lib/Object/ELFObjectFile.cpp
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@@ -28,30 +28,30 @@ ObjectFile *ObjectFile::createELFObjectFile(MemoryBuffer *Object) {
if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
if (MaxAlignment >= 4)
return new ELFObjectFile<support::little, 4, false>(Object, ec);
return new ELFObjectFile<ELFType<support::little, 4, false> >(Object, ec);
else if (MaxAlignment >= 2)
return new ELFObjectFile<support::little, 2, false>(Object, ec);
return new ELFObjectFile<ELFType<support::little, 2, false> >(Object, ec);
else
llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
if (MaxAlignment >= 4)
return new ELFObjectFile<support::big, 4, false>(Object, ec);
return new ELFObjectFile<ELFType<support::big, 4, false> >(Object, ec);
else if (MaxAlignment >= 2)
return new ELFObjectFile<support::big, 2, false>(Object, ec);
return new ELFObjectFile<ELFType<support::big, 2, false> >(Object, ec);
else
llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
if (MaxAlignment >= 8)
return new ELFObjectFile<support::big, 8, true>(Object, ec);
return new ELFObjectFile<ELFType<support::big, 8, true> >(Object, ec);
else if (MaxAlignment >= 2)
return new ELFObjectFile<support::big, 2, true>(Object, ec);
return new ELFObjectFile<ELFType<support::big, 2, true> >(Object, ec);
else
llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
if (MaxAlignment >= 8)
return new ELFObjectFile<support::little, 8, true>(Object, ec);
return new ELFObjectFile<ELFType<support::little, 8, true> >(Object, ec);
else if (MaxAlignment >= 2)
return new ELFObjectFile<support::little, 2, true>(Object, ec);
return new ELFObjectFile<ELFType<support::little, 2, true> >(Object, ec);
else
llvm_unreachable("Invalid alignment for ELF file!");
}