Kevin Enderby 527d783837 Tweak the MCExternalSymbolizer to not use the SymbolLookUp() call back ... to not guess at a symbol name in some cases. The problem is that in object files assembled starting at address 0, when trying to symbolicate something that starts like this: % cat x.s _t1: vpshufd $0x0, %xmm1, %xmm0 the symbolic disassembly can end up like this: % otool -tV x.o x.o: (__TEXT,__text) section _t1: 0000000000000000 vpshufd $_t1, %xmm1, %xmm0 Which is in this case produced incorrect symbolication. But it is useful in some cases to use the SymbolLookUp() call back to guess at some immediate values. For example one like this that does not have an external relocation entry: % cat y.s _t1: movl $_d1, %eax .data _d1: .long 0 % clang -c -arch i386 y.s % otool -tV y.o y.o: (__TEXT,__text) section _t1: 0000000000000000 movl $_d1, %eax % otool -rv y.o y.o: Relocation information (__TEXT,__text) 1 entries address pcrel length extern type scattered symbolnum/value 00000001 False long False VANILLA False 2 (__DATA,__data) So the change is based on it is not likely that an immediate Value coming from an instruction field of a width of 1 byte, other than branches and items with relocation, are not likely symbol addresses. With the change the first case above simply becomes: % otool -tV x.o x.o: (__TEXT,__text) section _t1: 0000000000000000 vpshufd $0x0, %xmm1, %xmm0 and the second case continues to work as expected. rdar://14863405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199698 91177308-0d34-0410-b5e6-96231b3b80d8		2014-01-21 00:23:17 +00:00
..
MCDisassembler	For the 'C' disassembler API, add a new ReferenceType for the	2014-01-06 22:08:08 +00:00
MCParser	Fix parsing of .symver directive on ARM	2014-01-15 22:40:02 +00:00
CMakeLists.txt
ELFObjectWriter.cpp	Force emit a relocation for @gnu_indirect_function symbols so that the indirect	2014-01-08 18:50:32 +00:00
LLVMBuild.txt
MachObjectWriter.cpp
Makefile
MCAsmBackend.cpp
MCAsmInfo.cpp	CommentColumn is always 40. Simplify.	2014-01-16 07:04:11 +00:00
MCAsmInfoCOFF.cpp
MCAsmInfoDarwin.cpp
MCAsmInfoELF.cpp
MCAsmStreamer.cpp	Add an emitRawComment function and use it to simplify some uses of EmitRawText.	2014-01-16 16:28:37 +00:00
MCAssembler.cpp	Fix indentation.	2014-01-13 15:50:36 +00:00
MCAtom.cpp
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
MCDisassembler.cpp
MCDwarf.cpp	[patch] Adjust behavior of FDE cross-section relocs for targets that don't support abs-differences.	2014-01-08 10:22:54 +00:00
MCELF.cpp
MCELFObjectTargetWriter.cpp
MCELFStreamer.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
MCExpr.cpp	ARM: add tlsldo relocation	2014-01-20 11:00:40 +00:00
MCExternalSymbolizer.cpp	Tweak the MCExternalSymbolizer to not use the SymbolLookUp() call back	2014-01-21 00:23:17 +00:00
MCFunction.cpp
MCInst.cpp
MCInstPrinter.cpp
MCInstrAnalysis.cpp
MCLabel.cpp
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp
MCModule.cpp
MCModuleYAML.cpp
MCNullStreamer.cpp
MCObjectDisassembler.cpp
MCObjectFileInfo.cpp	Revert "Revert r198851, "Prototype of skeleton type units for fission""	2014-01-10 01:38:41 +00:00
MCObjectStreamer.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
MCObjectSymbolizer.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
MCObjectWriter.cpp
MCPureStreamer.cpp
MCRegisterInfo.cpp
MCRelocationInfo.cpp	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
MCSection.cpp
MCSectionCOFF.cpp
MCSectionELF.cpp
MCSectionMachO.cpp
MCStreamer.cpp	Add an emitRawComment function and use it to simplify some uses of EmitRawText.	2014-01-16 16:28:37 +00:00
MCSubtargetInfo.cpp
MCSymbol.cpp
MCSymbolizer.cpp
MCValue.cpp
MCWin64EH.cpp
SubtargetFeature.cpp
WinCOFFObjectWriter.cpp
WinCOFFStreamer.cpp