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Force some values to be absolute and align based on the FDE pointers size. A small

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step towards using .cfi_* on OS X.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130273 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-04-27 01:43:49 +00:00
parent 547eb4fd56
commit 9266cc400e
1 changed files with 6 additions and 6 deletions
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12
lib/MC/MCDwarf.cpp
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@ -622,14 +622,14 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
const MCSection &section = *asmInfo.getEHFrameSection();
streamer.SwitchSection(&section);
MCSymbol *sectionStart = streamer.getContext().CreateTempSymbol();
MCSymbol *sectionStart = context.CreateTempSymbol();
MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol();
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
*sectionEnd, 4);
streamer.EmitLabel(sectionStart);
streamer.EmitValue(Length, 4);
streamer.EmitAbsValue(Length, 4);
// CIE ID
streamer.EmitIntValue(0, 4);
@ -715,13 +715,13 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0);
streamer.EmitValue(Length, 4);
streamer.EmitAbsValue(Length, 4);
streamer.EmitLabel(fdeStart);
// CIE Pointer
const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart,
0);
streamer.EmitValue(offset, 4);
streamer.EmitAbsValue(offset, 4);
unsigned fdeEncoding = asmInfo.getFDEEncoding();
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
@ -731,7 +731,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
// PC Range
const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,
*frame.End, 0);
streamer.EmitValue(Range, size);
streamer.EmitAbsValue(Range, size);
// Augmentation Data Length
MCSymbol *augmentationStart = streamer.getContext().CreateTempSymbol();
@ -751,7 +751,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
EmitCFIInstructions(streamer, frame.Instructions, frame.Begin);
// Padding
streamer.EmitValueToAlignment(4);
streamer.EmitValueToAlignment(size);
return fdeEnd;
}