Ulrich Weigand 7a34599db0 [PowerPC] Revert r185476 and fix up TLS variant kinds ... In the commit message to r185476 I wrote: >The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD >correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD. >This causes some confusion with the asm parser, since VK_PPC_TLSGD >is output as @tlsgd, which is then read back in as VK_TLSGD. > >To avoid this confusion, this patch removes the PowerPC-specific >modifiers and uses the generic modifiers throughout. (The only >drawback is that the generic modifiers are printed in upper case >while the usual convention on PowerPC is to use lower-case modifiers. >But this is just a cosmetic issue.) This was unfortunately incorrect, there is is fact another, serious drawback to using the default VK_TLSLD/VK_TLSGD variant kinds: using these causes ELFObjectWriter::RelocNeedsGOT to return true, which in turn causes the ELFObjectWriter to emit an undefined reference to _GLOBAL_OFFSET_TABLE_. This is a problem on powerpc64, because it uses the TOC instead of the GOT, and the linker does not provide _GLOBAL_OFFSET_TABLE_, so the symbol remains undefined. This means shared libraries using TLS built with the integrated assembler are currently broken. While the whole RelocNeedsGOT / _GLOBAL_OFFSET_TABLE_ situation probably ought to be properly fixed at some point, for now I'm simply reverting the r185476 commit. Now this in turn exposes the breakage of handling @tlsgd/@tlsld in the asm parser that this check-in was originally intended to fix. To avoid this regression, I'm also adding a different fix for this problem: while common code now parses @tlsgd as VK_TLSGD, a special hack in the asm parser translates this code to the platform-specific VK_PPC_TLSGD that the back-end now expects. While this is not really pretty, it's self-contained and shouldn't hurt anything else for now. One the underlying problem is fixed, this hack can be reverted again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185945 91177308-0d34-0410-b5e6-96231b3b80d8		2013-07-09 16:41:09 +00:00
..
MCDisassembler	Use pointers to the MCAsmInfo and MCRegInfo.	2013-06-18 07:20:20 +00:00
MCParser	MC: Implement COFF .linkonce directive	2013-07-06 12:13:10 +00:00
CMakeLists.txt
ELFObjectWriter.cpp
LLVMBuild.txt
MachObjectWriter.cpp
Makefile
MCAsmBackend.cpp
MCAsmInfo.cpp	DebugInfo: PR14404: Avoid truncating 64 bit values into 32 bits for ULEB128/SLEB128 generation	2013-06-23 18:31:11 +00:00
MCAsmInfoCOFF.cpp
MCAsmInfoDarwin.cpp
MCAsmStreamer.cpp	Remove address spaces from MC.	2013-07-02 15:49:13 +00:00
MCAssembler.cpp	Use MCFillFragment for zero-initialized data.	2013-06-27 14:35:03 +00:00
MCAtom.cpp
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp	MC: Implement COFF .linkonce directive	2013-07-06 12:13:10 +00:00
MCDisassembler.cpp
MCDwarf.cpp	Remove address spaces from MC.	2013-07-02 15:49:13 +00:00
MCELF.cpp
MCELFObjectTargetWriter.cpp
MCELFStreamer.cpp	[PowerPC] Revert r185476 and fix up TLS variant kinds	2013-07-09 16:41:09 +00:00
MCExpr.cpp	[PowerPC] Revert r185476 and fix up TLS variant kinds	2013-07-09 16:41:09 +00:00
MCExternalSymbolizer.cpp
MCFunction.cpp
MCInst.cpp
MCInstPrinter.cpp
MCInstrAnalysis.cpp
MCLabel.cpp
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp
MCModule.cpp	Remove use of asymmetric std::lower_bound comparator.	2013-07-04 23:20:12 +00:00
MCNullStreamer.cpp	Remove address spaces from MC.	2013-07-02 15:49:13 +00:00
MCObjectDisassembler.cpp	Allow creation of single-byte MCAtoms.	2013-06-19 20:18:59 +00:00
MCObjectFileInfo.cpp	Revert: Emit personality function and Dwarf EH data for Win64 SEH.	2013-07-08 04:43:23 +00:00
MCObjectStreamer.cpp	Remove address spaces from MC.	2013-07-02 15:49:13 +00:00
MCObjectSymbolizer.cpp
MCObjectWriter.cpp
MCPureStreamer.cpp	Remove address spaces from MC.	2013-07-02 15:49:13 +00:00
MCRegisterInfo.cpp
MCRelocationInfo.cpp
MCSection.cpp
MCSectionCOFF.cpp	MC: Implement COFF .linkonce directive	2013-07-06 12:13:10 +00:00
MCSectionELF.cpp
MCSectionMachO.cpp
MCStreamer.cpp	Revert: Fix wrong code offset for unwind code SET_FPREG.	2013-07-08 04:48:34 +00:00
MCSubtargetInfo.cpp
MCSymbol.cpp
MCSymbolizer.cpp
MCValue.cpp
MCWin64EH.cpp	Revert: Fix wrong code offset for unwind code SET_FPREG.	2013-07-08 04:48:34 +00:00
SubtargetFeature.cpp
WinCOFFObjectWriter.cpp	MC: Implement COFF .linkonce directive	2013-07-06 12:13:10 +00:00
WinCOFFStreamer.cpp	MC: Implement COFF .linkonce directive	2013-07-06 12:13:10 +00:00