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	Add a MCAsmInfoELF class and factor some code into it.	2013-10-16 01:34:32 +00:00
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	Correct word hyphenations	2013-12-05 05:44:44 +00:00
Makefile
MCAsmBackend.cpp
MCAsmInfo.cpp	CommentColumn is always 40. Simplify.	2014-01-16 07:04:11 +00:00
MCAsmInfoCOFF.cpp	Make the llvm mangler depend only on DataLayout.	2014-01-03 19:21:54 +00:00
MCAsmInfoDarwin.cpp	Make the llvm mangler depend only on DataLayout.	2014-01-03 19:21:54 +00:00
MCAsmInfoELF.cpp	Refactor the setting of PrivateGlobalPrefix.	2013-12-02 23:39:26 +00:00
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	[weak vtables] Remove a bunch of weak vtables	2013-11-19 00:57:56 +00:00
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	[mc] Fix ELF st_other flag.	2013-12-05 00:34:11 +00:00
MCELFObjectTargetWriter.cpp	Provide basic type safety for array_pod_sort comparators.	2013-09-22 14:09:50 +00:00
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	Style cleanup following David's review for r188876.	2013-08-21 19:40:25 +00:00
MCInst.cpp
MCInstPrinter.cpp	[MC] When MCInstPrint::printAnnotation uses a comment stream, it has to ensure	2013-10-01 19:21:24 +00:00
MCInstrAnalysis.cpp
MCLabel.cpp
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp	Move .ident handling to MCStreamer.	2013-10-16 01:05:45 +00:00
MCModule.cpp	MC CFG: Split MCBasicBlocks to mirror atom splitting.	2013-08-21 07:28:24 +00:00
MCModuleYAML.cpp	MC CFG: Add YAML MCModule representation to enable MC CFG testing.	2013-08-21 07:29:02 +00:00
MCNullStreamer.cpp	Add a MCTargetStreamer interface.	2013-10-08 13:08:17 +00:00
MCObjectDisassembler.cpp	Create an atom with just the data that failed to disassemble.	2013-10-16 19:03:14 +00:00
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	Move .ident handling to MCStreamer.	2013-10-16 01:05:45 +00:00
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	MC COFF: Emit the 'b' section flag for .bss sections in GNU assembly	2013-12-17 22:12:40 +00:00
MCSectionELF.cpp	Remove AllowQuotesInName and friends from MCAsmInfo.	2013-11-13 14:01:59 +00:00
MCSectionMachO.cpp	Correct word hyphenations	2013-12-05 05:44:44 +00:00
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	MC: Don't assume incoming StringRef's are null terminated.	2013-10-13 22:09:26 +00:00
MCSymbol.cpp	Don't mangle \n and "	2013-11-14 06:05:49 +00:00
MCSymbolizer.cpp
MCValue.cpp
MCWin64EH.cpp	Fix alignment of unwind data.	2013-09-15 18:01:09 +00:00
SubtargetFeature.cpp	MC: Don't assume incoming StringRef's are null terminated.	2013-10-13 22:09:26 +00:00
WinCOFFObjectWriter.cpp	MC: Fatally error if subtraction operand is bad	2014-01-06 07:39:46 +00:00
WinCOFFStreamer.cpp	clang-format a couple of mis-formatted functions	2013-12-20 20:16:51 +00:00