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31b080d57f
llvm-6502/lib/MC
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David Majnemer 31b080d57f MC: Support aligned COMMON symbols for COFF 
link.exe:
Fuzz testing has shown that COMMON symbols with size > 32 will always
have an alignment of at least 32 and all symbols with size < 32 will
have an alignment of at least the largest power of 2 less than the size
of the symbol.

binutils:
The BFD linker essentially work like the link.exe behavior but with
alignment 4 instead of 32.  The BFD linker also supports an extension to
COFF which adds an -aligncomm argument to the .drectve section which
permits specifying a precise alignment for a variable but MC currently
doesn't support editing .drectve in this way.

With all of this in mind, we decide to play a little trick: we can
ensure that the alignment will be respected by bumping the size of the
global to it's alignment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218201 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-21 09:18:07 +00:00
..
MCDisassembler Change MCSchedModel to be a struct of statically initialized data. 2014-09-02 17:43:54 +00:00
MCParser Fix left shifts by too large exponents in MCParser 2014-09-02 17:25:29 +00:00
CMakeLists.txt Nuke MCAnalysis. 2014-09-02 22:32:20 +00:00
ConstantPools.cpp Fix build failure on windows 2014-07-18 16:41:58 +00:00
ELFObjectWriter.cpp Elide unnecessary DenseMap copy. 2014-09-19 12:26:38 +00:00
LLVMBuild.txt Nuke MCAnalysis. 2014-09-02 22:32:20 +00:00
MachObjectWriter.cpp If available, pass down the Fixup object to EvaluateAsRelocatable. 2014-08-10 11:35:12 +00:00
Makefile Nuke MCAnalysis. 2014-09-02 22:32:20 +00:00
MCAsmBackend.cpp Simplify a really complicated check for Arch == X86_64. 2014-03-11 21:22:57 +00:00
MCAsmInfo.cpp MC: remove unnecessary enumeration prefix 2014-09-01 23:48:29 +00:00
MCAsmInfoCOFF.cpp Remove HasLEB128. 2014-08-15 14:01:07 +00:00
MCAsmInfoDarwin.cpp MachO: actually set linker-private prefix at MC level. 2014-03-29 07:33:24 +00:00
MCAsmInfoELF.cpp Refactor the setting of PrivateGlobalPrefix. 2013-12-02 23:39:26 +00:00
MCAsmStreamer.cpp MC Win64: Put unwind info for COMDAT code into the same COMDAT group 2014-09-04 17:42:03 +00:00
MCAssembler.cpp Add and update reset() and doInitialization() methods to MC* and passes. 2014-09-17 09:25:36 +00:00
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp Add and update reset() and doInitialization() methods to MC* and passes. 2014-09-17 09:25:36 +00:00
MCDwarf.cpp MC: correct DWARF line info for PE/COFF 2014-09-06 19:57:48 +00:00
MCELF.cpp [MC] Constify MCELF::GetVisibility and MCELF::getOther 2014-07-11 17:34:44 +00:00
MCELFObjectTargetWriter.cpp [MC] Pass MCSymbolData to needsRelocateWithSymbol 2014-07-20 23:15:06 +00:00
MCELFStreamer.cpp Print a=b as an assignment. 2014-06-24 22:45:16 +00:00
MCExpr.cpp Add a helper to MCExpr for when an expression is know to be absolute. 2014-08-15 14:20:32 +00:00
MCInst.cpp [C++11] More 'nullptr' conversion or in some cases just using a boolean check instead of comparing to nullptr. 2014-04-13 04:57:38 +00:00
MCInstPrinter.cpp [MC] When MCInstPrint::printAnnotation uses a comment stream, it has to ensure 2013-10-01 19:21:24 +00:00
MCInstrAnalysis.cpp MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
MCLabel.cpp
MCLinkerOptimizationHint.cpp [ARM64][CollectLOH] Add some comments to explain how the LOHs 2014-04-02 01:02:28 +00:00
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp Add and update reset() and doInitialization() methods to MC* and passes. 2014-09-17 09:25:36 +00:00
MCNullStreamer.cpp Merge the used symbol scanning of MCObjectStreamer and RecordStreamer. 2014-06-25 18:37:33 +00:00
MCObjectFileInfo.cpp MC: Support aligned COMMON symbols for COFF 2014-09-21 09:18:07 +00:00
MCObjectStreamer.cpp Make EmitDwarfSetLineAddr an static helper. NFC. 2014-08-15 14:43:02 +00:00
MCObjectWriter.cpp
MCRegisterInfo.cpp Make SubRegIndex size mandatory, following r183020. 2013-05-31 23:45:26 +00:00
MCSection.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MCSectionCOFF.cpp MC: Fix MCSectionCOFF::PrintSwitchToSection 2014-09-20 20:40:50 +00:00
MCSectionELF.cpp Remove AllowQuotesInName and friends from MCAsmInfo. 2013-11-13 14:01:59 +00:00
MCSectionMachO.cpp [C++11] More 'nullptr' conversion or in some cases just using a boolean check instead of comparing to nullptr. 2014-04-13 04:57:38 +00:00
MCStreamer.cpp Another required re-setting for MCStreamer::reset(). 2014-09-17 17:50:34 +00:00
MCSubtargetInfo.cpp Change MCSchedModel to be a struct of statically initialized data. 2014-09-02 17:43:54 +00:00
MCSymbol.cpp Revert "Add back r203962, r204028 and r204059." 2014-03-19 00:13:43 +00:00
MCSymbolizer.cpp Move MCSymbolizer's constructor into header. It's trivial - there's no need for 2014-03-27 02:42:52 +00:00
MCTargetOptions.cpp Convert MC command line option for fatal assembler warnings into a 2014-08-26 18:39:50 +00:00
MCValue.cpp Fix pr19645. 2014-05-03 19:57:04 +00:00
MCWin64EH.cpp MC Win64: Put unwind info for COMDAT code into the same COMDAT group 2014-09-04 17:42:03 +00:00
MCWinEH.cpp MC Win64: Put unwind info for COMDAT code into the same COMDAT group 2014-09-04 17:42:03 +00:00
StringTableBuilder.cpp Invert the MC -> Object dependency. 2014-07-03 02:01:39 +00:00
SubtargetFeature.cpp Fix some cases where StringRef was being passed by const reference. Remove const from some other StringRefs since its implicitly const already. 2014-08-30 16:48:02 +00:00
WinCOFFObjectWriter.cpp This add a reset method for WinCOFFObjectWriter, like other MC* classes. 2014-09-16 21:31:04 +00:00
WinCOFFStreamer.cpp MC: Support aligned COMMON symbols for COFF 2014-09-21 09:18:07 +00:00
YAML.cpp Invert the MC -> Object dependency. 2014-07-03 02:01:39 +00:00