Isa, Discriminator, FileName);
}
+static const MCExpr *buildSymbolDiff(MCObjectStreamer &OS, const MCSymbol *A,
+ const MCSymbol *B) {
+ MCContext &Context = OS.getContext();
+ MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
+ const MCExpr *ARef = MCSymbolRefExpr::Create(A, Variant, Context);
+ const MCExpr *BRef = MCSymbolRefExpr::Create(B, Variant, Context);
+ const MCExpr *AddrDelta =
+ MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
+ return AddrDelta;
+}
+
+static void emitDwarfSetLineAddr(MCObjectStreamer &OS, int64_t LineDelta,
+ const MCSymbol *Label, int PointerSize) {
+ // emit the sequence to set the address
+ OS.EmitIntValue(dwarf::DW_LNS_extended_op, 1);
+ OS.EmitULEB128IntValue(PointerSize + 1);
+ OS.EmitIntValue(dwarf::DW_LNE_set_address, 1);
+ OS.EmitSymbolValue(Label, PointerSize);
+
+ // emit the sequence for the LineDelta (from 1) and a zero address delta.
+ MCDwarfLineAddr::Emit(&OS, LineDelta, 0);
+}
+
void MCObjectStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
const MCSymbol *LastLabel,
const MCSymbol *Label,
unsigned PointerSize) {
if (!LastLabel) {
- EmitDwarfSetLineAddr(LineDelta, Label, PointerSize);
+ emitDwarfSetLineAddr(*this, LineDelta, Label, PointerSize);
return;
}
- const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
int64_t Res;
if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
MCDwarfLineAddr::Emit(this, LineDelta, Res);
void MCObjectStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
const MCSymbol *Label) {
- const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel);
+ const MCExpr *AddrDelta = buildSymbolDiff(*this, Label, LastLabel);
int64_t Res;
if (AddrDelta->EvaluateAsAbsolute(Res, getAssembler())) {
MCDwarfFrameEmitter::EmitAdvanceLoc(*this, Res);