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Add the getExprForFDESymbol method that responsible for computing the

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expressions used in the FDE to refer to symbols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130437 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-04-28 21:04:39 +00:00
parent 77562c74e5
commit a0057ca13f
5 changed files with 21 additions and 16 deletions
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3
include/llvm/MC/MCAsmInfo.h
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@ -328,6 +328,9 @@ namespace llvm {
getExprForPersonalitySymbol(const MCSymbol *Sym, getExprForPersonalitySymbol(const MCSymbol *Sym,
MCStreamer &Streamer) const; MCStreamer &Streamer) const;
virtual const MCExpr *
getExprForFDESymbol(const MCSymbol *Sym, MCStreamer &Streamer) const;
bool usesSunStyleELFSectionSwitchSyntax() const { bool usesSunStyleELFSectionSwitchSyntax() const {
return SunStyleELFSectionSwitchSyntax; return SunStyleELFSectionSwitchSyntax;
} }

3
include/llvm/MC/MCAsmInfoDarwin.h
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@ -26,8 +26,7 @@ namespace llvm {
struct MCAsmInfoDarwin : public MCAsmInfo { struct MCAsmInfoDarwin : public MCAsmInfo {
explicit MCAsmInfoDarwin(); explicit MCAsmInfoDarwin();
virtual const MCExpr * virtual const MCExpr *
getExprForPersonalitySymbol(const MCSymbol *Sym, getExprForFDESymbol(const MCSymbol *Sym, MCStreamer &Streamer) const;
MCStreamer &Streamer) const;
}; };
} }

6
lib/MC/MCAsmInfo.cpp
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@ -112,5 +112,11 @@ unsigned MCAsmInfo::getSLEB128Size(int Value) {
const MCExpr * const MCExpr *
MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym, MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym,
MCStreamer &Streamer) const { MCStreamer &Streamer) const {
return getExprForFDESymbol(Sym, Streamer);
}
const MCExpr *
MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
MCStreamer &Streamer) const {
return MCSymbolRefExpr::Create(Sym, Streamer.getContext()); return MCSymbolRefExpr::Create(Sym, Streamer.getContext());
} }

4
lib/MC/MCAsmInfoDarwin.cpp
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@ -61,8 +61,8 @@ MCAsmInfoDarwin::MCAsmInfoDarwin() {
} }
const MCExpr * const MCExpr *
MCAsmInfoDarwin::getExprForPersonalitySymbol(const MCSymbol *Sym, MCAsmInfoDarwin::getExprForFDESymbol(const MCSymbol *Sym,
MCStreamer &Streamer) const { MCStreamer &Streamer) const {
MCContext &Context = Streamer.getContext(); MCContext &Context = Streamer.getContext();
const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context); const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context);
MCSymbol *PCSym = Context.CreateTempSymbol(); MCSymbol *PCSym = Context.CreateTempSymbol();

21
lib/MC/MCDwarf.cpp
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@ -465,19 +465,16 @@ static unsigned getSizeForEncoding(MCStreamer &streamer,
static void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol, static void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol,
unsigned symbolEncoding) { unsigned symbolEncoding) {
MCContext &context = streamer.getContext();
const MCAsmInfo &asmInfo = context.getAsmInfo();
const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol,
streamer);
unsigned size = getSizeForEncoding(streamer, symbolEncoding); unsigned size = getSizeForEncoding(streamer, symbolEncoding);
unsigned application = symbolEncoding & 0x70; unsigned application = symbolEncoding & 0x70;
switch (application) { if (isa<MCSymbolRefExpr>(v) && application == dwarf::DW_EH_PE_pcrel)
default: streamer.EmitPCRelValue(v, size);
assert(0 && "Unknown Encoding"); else
break; streamer.EmitAbsValue(v, size);
case 0:
streamer.EmitSymbolValue(&symbol, size);
break;
case dwarf::DW_EH_PE_pcrel:
streamer.EmitPCRelSymbolValue(&symbol, size);
break;
}
} }
static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol, static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol,
@ -756,7 +753,7 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
unsigned size = getSizeForEncoding(streamer, fdeEncoding); unsigned size = getSizeForEncoding(streamer, fdeEncoding);
// PC Begin // PC Begin
streamer.EmitPCRelSymbolValue(frame.Begin, size); EmitSymbol(streamer, *frame.Begin, fdeEncoding);
// PC Range // PC Range
const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin, const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,