void AddressPool::emitHeader(AsmPrinter &Asm, MCSection *Section) {
static const uint8_t AddrSize = Asm.getDataLayout().getPointerSize();
- Asm.OutStreamer->SwitchSection(Section);
-
uint64_t Length = sizeof(uint16_t) // version
+ sizeof(uint8_t) // address_size
+ sizeof(uint8_t) // segment_selector_size
// Emit addresses into the section given.
void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
+ // Start the dwarf addr section.
+ Asm.OutStreamer->SwitchSection(AddrSection);
+
if (Asm.getDwarfVersion() >= 5)
emitHeader(Asm, AddrSection);
+ // Define the symbol that marks the start of the contribution.
+ // It is referenced via DW_AT_addr_base.
+ Asm.OutStreamer->EmitLabel(AddressTableBaseSym);
+
if (Pool.empty())
return;
- // Start the dwarf addr section.
- Asm.OutStreamer->SwitchSection(AddrSection);
-
// Order the address pool entries by ID
SmallVector<const MCExpr *, 64> Entries(Pool.size());
void resetUsedFlag() { HasBeenUsed = false; }
+ MCSymbol *getLabel() { return AddressTableBaseSym; }
+ void setLabel(MCSymbol *Sym) { AddressTableBaseSym = Sym; }
+
private:
void emitHeader(AsmPrinter &Asm, MCSection *Section);
+
+ /// Symbol designates the start of the contribution to the address table.
+ MCSymbol *AddressTableBaseSym = nullptr;
};
} // end namespace llvm
(useSplitDwarf() ? SkeletonHolder : InfoHolder)
.setRnglistsTableBaseSym(Asm->createTempSymbol("rnglists_table_base"));
+ // Create the symbol that points to the first entry following the debug
+ // address table (.debug_addr) header.
+ AddrPool.setLabel(Asm->createTempSymbol("addr_table_base"));
+
for (DICompileUnit *CUNode : M->debug_compile_units()) {
// FIXME: Move local imported entities into a list attached to the
// subprogram, then this search won't be needed and a
}
// We don't keep track of which addresses are used in which CU so this
// is a bit pessimistic under LTO.
- if (!AddrPool.isEmpty()) {
- const MCSymbol *Sym = TLOF.getDwarfAddrSection()->getBeginSymbol();
- SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_addr_base,
- Sym, Sym);
- }
+ if (!AddrPool.isEmpty())
+ SkCU->addAddrTableBase();
+
if (getDwarfVersion() < 5 && !SkCU->getRangeLists().empty()) {
const MCSymbol *Sym = TLOF.getDwarfRangesSection()->getBeginSymbol();
SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_ranges_base,
DU->getRnglistsTableBaseSym(),
TLOF.getDwarfRnglistsSection()->getBeginSymbol());
}
+
+void DwarfUnit::addAddrTableBase() {
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ MCSymbol *Label = DD->getAddressPool().getLabel();
+ addSectionLabel(getUnitDie(), dwarf::DW_AT_GNU_addr_base, Label,
+ TLOF.getDwarfAddrSection()->getBeginSymbol());
+}
/// Add the DW_AT_rnglists_base attribute to the unit DIE.
void addRnglistsBase();
+ /// Add the DW_AT_addr_base attribute to the unit DIE.
+ void addAddrTableBase();
+
virtual DwarfCompileUnit &getCU() = 0;
void constructTypeDIE(DIE &Buffer, const DICompositeType *CTy);
; CHECK-NEXT: .byte 224
; check that the expected TLS address description is the first thing in the debug_addr section
; CHECK: .section .debug_addr,"",@progbits
+; CHECK-NEXT: .Laddr_table_base0:
; CHECK-NEXT: .quad tls@DTPREL+32768
source_filename = "test/DebugInfo/PowerPC/tls-fission.ll"
; DWARF5: DW_TAG_compile_unit
; DWARF5-NOT: DW_TAG_{{.*}}
; DWARF5: DW_AT_GNU_dwo_name{{.*}}test.dwo
-; DWARF5: DW_AT_GNU_addr_base{{.*}}0x00000000
+; DWARF5: DW_AT_GNU_addr_base{{.*}}0x00000008
; DWARF5: .debug_addr contents:
; DWARF5-NEXT: 0x00000000: Addr Section: length = 0x0000000c, version = 0x0005, addr_size = 0x04, seg_size = 0x00
; DWARF5-NEXT: Addrs: [
; check that the expected TLS address description is the first thing in the debug_addr section
; FISSION: .section .debug_addr
+; FISSION-NEXT: .Laddr_table_base0:
; FISSION-NEXT: .quad tls@DTPOFF
; FISSION-NEXT: .quad glbl
; FISSION-NOT: .quad glbl