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Add comments to the FDE. 

llvm-svn: 134196
This commit is contained in:
Bill Wendling 2011-06-30 22:02:20 +00:00
parent db49969b32
commit f166ab447e
1 changed files with 13 additions and 5 deletions
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18
llvm/lib/MC/MCDwarf.cpp
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@ -460,13 +460,14 @@ static unsigned getSizeForEncoding(MCStreamer &streamer,
}
static void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol,
unsigned symbolEncoding) {
unsigned symbolEncoding, const char *comment = 0) {
MCContext &context = streamer.getContext();
const MCAsmInfo &asmInfo = context.getAsmInfo();
const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol,
symbolEncoding,
streamer);
unsigned size = getSizeForEncoding(streamer, symbolEncoding);
if (streamer.isVerboseAsm() && comment) streamer.AddComment(comment);
streamer.EmitAbsValue(v, size);
}
@ -882,16 +883,18 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
MCSymbol *fdeStart = context.CreateTempSymbol();
MCSymbol *fdeEnd = context.CreateTempSymbol();
const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo();
bool verboseAsm = streamer.isVerboseAsm();
if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) {
MCSymbol *EHSym = context.GetOrCreateSymbol(
frame.Function->getName() + Twine(".eh"));
MCSymbol *EHSym =
context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh"));
streamer.EmitEHSymAttributes(frame.Function, EHSym);
streamer.EmitLabel(EHSym);
}
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0);
if (verboseAsm) streamer.AddComment("FDE Length");
streamer.EmitAbsValue(Length, 4);
streamer.EmitLabel(fdeStart);
@ -901,6 +904,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
if (IsEH) {
const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart,
0);
if (verboseAsm) streamer.AddComment("FDE CIE Offset");
streamer.EmitAbsValue(offset, 4);
} else if (!asmInfo.doesDwarfRequireRelocationForSectionOffset()) {
const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart,
@ -909,6 +913,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
} else {
streamer.EmitSymbolValue(&cieStart, 4);
}
unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI);
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
@ -916,11 +921,12 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
unsigned PCBeginEncoding = IsEH ? fdeEncoding :
(unsigned)dwarf::DW_EH_PE_absptr;
unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding);
EmitSymbol(streamer, *frame.Begin, PCBeginEncoding);
EmitSymbol(streamer, *frame.Begin, PCBeginEncoding, "FDE initial location");
// PC Range
const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,
*frame.End, 0);
if (verboseAsm) streamer.AddComment("FDE address range");
streamer.EmitAbsValue(Range, size);
if (IsEH) {
@ -930,11 +936,13 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
if (frame.Lsda)
augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding);
if (verboseAsm) streamer.AddComment("Augmentation size");
streamer.EmitULEB128IntValue(augmentationLength);
// Augmentation Data
if (frame.Lsda)
EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding);
EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding,
"Language Specific Data Area");
}
// Call Frame Instructions