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where both symbols are "local", that is non-external symbols, and there is no "base" for the symbols used in the expression, that is the section has no non-temporary symbols. This case looks like this: % cat local_reloc_A-B.s .long 0 LB: .long 1 .long LA - LB - 4 .long 2 LA: .long 3 which llvm-mc will not encode without this patch, generates a "unsupported local relocations in difference" error, but the Darwin assembler will encode with relocation entries like this: % otool -rv a.out l.out a.out: Relocation information (__TEXT,__text) 2 entries address pcrel length extern type scattered symbolnum/value 00000008 False long False SUB False 1 (__TEXT,__text) 00000008 False long False UNSIGND False 1 (__TEXT,__text) which is very similar to what is encoded when the symbols don't have the leading 'L' and they are not temporary symbols. Which llvm-mc and the Darwin assembler will encoded like this: Relocation information (__TEXT,__text) 2 entries address pcrel length extern type scattered symbolnum/value 00000008 False long True SUB False B 00000008 False long True UNSIGND False A This is the missing relocation encoding needed to allow the Mach-O x86 Dwarf file and line table to be emitted. So this patch also removes the TODO from the if() statement in MCMachOStreamer::Finish() that didn't call MCDwarfFileTable::Emit() for 64-bit targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115389 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
MCDisassembler | ||
MCParser | ||
CMakeLists.txt | ||
ELFObjectWriter.cpp | ||
MachObjectWriter.cpp | ||
Makefile | ||
MCAsmInfo.cpp | ||
MCAsmInfoCOFF.cpp | ||
MCAsmInfoDarwin.cpp | ||
MCAsmStreamer.cpp | ||
MCAssembler.cpp | ||
MCCodeEmitter.cpp | ||
MCContext.cpp | ||
MCDisassembler.cpp | ||
MCDwarf.cpp | ||
MCELFStreamer.cpp | ||
MCExpr.cpp | ||
MCInst.cpp | ||
MCInstPrinter.cpp | ||
MCLabel.cpp | ||
MCLoggingStreamer.cpp | ||
MCMachOStreamer.cpp | ||
MCNullStreamer.cpp | ||
MCObjectStreamer.cpp | ||
MCObjectWriter.cpp | ||
MCSection.cpp | ||
MCSectionCOFF.cpp | ||
MCSectionELF.cpp | ||
MCSectionMachO.cpp | ||
MCStreamer.cpp | ||
MCSymbol.cpp | ||
MCValue.cpp | ||
TargetAsmBackend.cpp | ||
WinCOFFObjectWriter.cpp | ||
WinCOFFStreamer.cpp |