llvm-6502/lib/MC
Rafael Espindola 65300b95e6 Remove doesSectionRequireSymbols.
In an assembly expression like

bar:
.long L0 + 1

the intended semantics is that bar will contain a pointer one byte past L0.

In sections that are merged by content (strings, 4 byte constants, etc), a
single position in the section doesn't give the linker enough information.
For example, it would not be able to tell a relocation must point to the
end of a string, since that would look just like the start of the next.

The solution used in ELF to use relocation with symbols if there is a non-zero
addend.

In MachO before this patch we would just keep all symbols in some sections.

This would miss some cases (only cstrings on x86_64 were implemented) and was
inefficient since most relocations have an addend of 0 and can be represented
without the symbol.

This patch implements the non-zero addend logic for MachO too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224985 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-30 13:13:27 +00:00
..
MCDisassembler Fix a regression on the disassembling C API. 2014-11-13 16:52:07 +00:00
MCParser MC: Label definitions are permitted after .set directives 2014-12-24 10:27:50 +00:00
CMakeLists.txt
ConstantPools.cpp
ELFObjectWriter.cpp Remove doesSectionRequireSymbols. 2014-12-30 13:13:27 +00:00
LLVMBuild.txt
MachObjectWriter.cpp Remove doesSectionRequireSymbols. 2014-12-30 13:13:27 +00:00
Makefile
MCAsmBackend.cpp
MCAsmInfo.cpp Refactor duplicated code. 2014-12-29 15:18:31 +00:00
MCAsmInfoCOFF.cpp
MCAsmInfoDarwin.cpp Remove doesSectionRequireSymbols. 2014-12-30 13:13:27 +00:00
MCAsmInfoELF.cpp Allow target to specify prefix for labels 2014-12-04 00:06:57 +00:00
MCAsmStreamer.cpp MC: Don't emit .no_dead_strip on targets which don't support it 2014-12-24 04:11:42 +00:00
MCAssembler.cpp Remove doesSectionRequireSymbols. 2014-12-30 13:13:27 +00:00
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
MCDwarf.cpp Remove StringMap::GetOrCreateValue in favor of StringMap::insert 2014-11-19 05:49:42 +00:00
MCELF.cpp
MCELFObjectTargetWriter.cpp
MCELFStreamer.cpp
MCExpr.cpp Instead of explicitely comparing both lowercase and uppercase variants. 2014-12-18 23:12:34 +00:00
MCInst.cpp
MCInstPrinter.cpp
MCInstrAnalysis.cpp
MCLabel.cpp
MCLinkerOptimizationHint.cpp
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp
MCNullStreamer.cpp
MCObjectFileInfo.cpp Commit back the correct bits of r222760 (was r222538). 2014-11-27 17:13:56 +00:00
MCObjectStreamer.cpp Clean up static analyzer warnings. 2014-12-12 21:48:03 +00:00
MCObjectWriter.cpp
MCRegisterInfo.cpp
MCSection.cpp
MCSectionCOFF.cpp
MCSectionELF.cpp
MCSectionMachO.cpp
MCStreamer.cpp
MCSubtargetInfo.cpp
MCSymbol.cpp
MCSymbolizer.cpp
MCTargetOptions.cpp
MCValue.cpp
MCWin64EH.cpp
MCWinEH.cpp Fix Windows unwind info for functions in sections other than .text 2014-12-22 22:10:08 +00:00
StringTableBuilder.cpp
SubtargetFeature.cpp
WinCOFFObjectWriter.cpp Remove doesSectionRequireSymbols. 2014-12-30 13:13:27 +00:00
WinCOFFStreamer.cpp MC, COFF: Use relocations for function references inside the section 2014-11-11 08:43:57 +00:00
YAML.cpp