[llvm] r344895 - [llvm-dwarfdump] - Add the support of parsing .debug_loclists.
George Rimar via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 22 04:30:54 PDT 2018
Author: grimar
Date: Mon Oct 22 04:30:54 2018
New Revision: 344895
URL: http://llvm.org/viewvc/llvm-project?rev=344895&view=rev
Log:
[llvm-dwarfdump] - Add the support of parsing .debug_loclists.
This teaches llvm-dwarfdump to dump the content of .debug_loclists sections.
It converts the DWARFDebugLocDWO class to DWARFDebugLoclists,
teaches llvm-dwarfdump about .debug_loclists section and
adds the implementation for parsing the DW_LLE_offset_pair entries.
Differential revision: https://reviews.llvm.org/D53364
Added:
llvm/trunk/test/DebugInfo/X86/dwarfdump-debug-loclists.test
Modified:
llvm/trunk/include/llvm/BinaryFormat/Dwarf.def
llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFContext.h
llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFObject.h
llvm/trunk/lib/DebugInfo/DWARF/DWARFContext.cpp
llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp
llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp
Modified: llvm/trunk/include/llvm/BinaryFormat/Dwarf.def
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/BinaryFormat/Dwarf.def?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/include/llvm/BinaryFormat/Dwarf.def (original)
+++ llvm/trunk/include/llvm/BinaryFormat/Dwarf.def Mon Oct 22 04:30:54 2018
@@ -873,6 +873,7 @@ HANDLE_DWARF_SECTION(DebugTypes, ".debug
HANDLE_DWARF_SECTION(DebugLine, ".debug_line", "debug-line")
HANDLE_DWARF_SECTION(DebugLineStr, ".debug_line_str", "debug-line-str")
HANDLE_DWARF_SECTION(DebugLoc, ".debug_loc", "debug-loc")
+HANDLE_DWARF_SECTION(DebugLoclists, ".debug_loclists", "debug-loclists")
HANDLE_DWARF_SECTION(DebugFrame, ".debug_frame", "debug-frame")
HANDLE_DWARF_SECTION(DebugMacro, ".debug_macro", "debug-macro")
HANDLE_DWARF_SECTION(DebugNames, ".debug_names", "debug-names")
Modified: llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFContext.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFContext.h?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFContext.h (original)
+++ llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFContext.h Mon Oct 22 04:30:54 2018
@@ -76,7 +76,7 @@ class DWARFContext : public DIContext {
DWARFUnitVector DWOUnits;
std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
- std::unique_ptr<DWARFDebugLocDWO> LocDWO;
+ std::unique_ptr<DWARFDebugLoclists> LocDWO;
/// The maximum DWARF version of all units.
unsigned MaxVersion = 0;
@@ -262,7 +262,7 @@ public:
const DWARFDebugAbbrev *getDebugAbbrevDWO();
/// Get a pointer to the parsed DebugLoc object.
- const DWARFDebugLocDWO *getDebugLocDWO();
+ const DWARFDebugLoclists *getDebugLocDWO();
/// Get a pointer to the parsed DebugAranges object.
const DWARFDebugAranges *getDebugAranges();
Modified: llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h (original)
+++ llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h Mon Oct 22 04:30:54 2018
@@ -73,19 +73,21 @@ public:
uint32_t *Offset);
};
-class DWARFDebugLocDWO {
+class DWARFDebugLoclists {
public:
struct Entry {
- uint64_t Start;
- uint32_t Length;
+ uint8_t Kind;
+ uint64_t Value0;
+ uint64_t Value1;
SmallVector<char, 4> Loc;
};
struct LocationList {
unsigned Offset;
SmallVector<Entry, 2> Entries;
- void dump(raw_ostream &OS, bool IsLittleEndian, unsigned AddressSize,
- const MCRegisterInfo *RegInfo, unsigned Indent) const;
+ void dump(raw_ostream &OS, uint64_t BaseAddr, bool IsLittleEndian,
+ unsigned AddressSize, const MCRegisterInfo *RegInfo,
+ unsigned Indent) const;
};
private:
@@ -99,7 +101,7 @@ private:
public:
void parse(DataExtractor data);
- void dump(raw_ostream &OS, const MCRegisterInfo *RegInfo,
+ void dump(raw_ostream &OS, uint64_t BaseAddr, const MCRegisterInfo *RegInfo,
Optional<uint64_t> Offset) const;
/// Return the location list at the given offset or nullptr.
Modified: llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFObject.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFObject.h?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFObject.h (original)
+++ llvm/trunk/include/llvm/DebugInfo/DWARF/DWARFObject.h Mon Oct 22 04:30:54 2018
@@ -38,6 +38,7 @@ public:
forEachTypesSections(function_ref<void(const DWARFSection &)> F) const {}
virtual StringRef getAbbrevSection() const { return ""; }
virtual const DWARFSection &getLocSection() const { return Dummy; }
+ virtual const DWARFSection &getLoclistsSection() const { return Dummy; }
virtual StringRef getARangeSection() const { return ""; }
virtual StringRef getDebugFrameSection() const { return ""; }
virtual StringRef getEHFrameSection() const { return ""; }
Modified: llvm/trunk/lib/DebugInfo/DWARF/DWARFContext.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARF/DWARFContext.cpp?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFContext.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFContext.cpp Mon Oct 22 04:30:54 2018
@@ -292,6 +292,27 @@ dumpRnglistsSection(raw_ostream &OS, DWA
}
}
+static void dumpLoclistsSection(raw_ostream &OS, DIDumpOptions DumpOpts,
+ DWARFDataExtractor Data,
+ const MCRegisterInfo *MRI,
+ Optional<uint64_t> DumpOffset) {
+ uint32_t Offset = 0;
+ DWARFDebugLoclists Loclists;
+
+ DWARFListTableHeader Header(".debug_loclists", "locations");
+ if (Error E = Header.extract(Data, &Offset)) {
+ WithColor::error() << toString(std::move(E)) << '\n';
+ return;
+ }
+
+ Header.dump(OS, DumpOpts);
+ DataExtractor LocData(Data.getData().drop_front(Offset),
+ Data.isLittleEndian(), Header.getAddrSize());
+
+ Loclists.parse(LocData);
+ Loclists.dump(OS, 0, MRI, DumpOffset);
+}
+
void DWARFContext::dump(
raw_ostream &OS, DIDumpOptions DumpOpts,
std::array<Optional<uint64_t>, DIDT_ID_Count> DumpOffsets) {
@@ -366,9 +387,15 @@ void DWARFContext::dump(
DObj->getLocSection().Data)) {
getDebugLoc()->dump(OS, getRegisterInfo(), DumpOffset);
}
+ if (shouldDump(Explicit, ".debug_loclists", DIDT_ID_DebugLoclists,
+ DObj->getLoclistsSection().Data)) {
+ DWARFDataExtractor Data(*DObj, DObj->getLoclistsSection(), isLittleEndian(),
+ 0);
+ dumpLoclistsSection(OS, DumpOpts, Data, getRegisterInfo(), DumpOffset);
+ }
if (shouldDump(ExplicitDWO, ".debug_loc.dwo", DIDT_ID_DebugLoc,
DObj->getLocDWOSection().Data)) {
- getDebugLocDWO()->dump(OS, getRegisterInfo(), DumpOffset);
+ getDebugLocDWO()->dump(OS, 0, getRegisterInfo(), DumpOffset);
}
if (shouldDump(Explicit, ".debug_frame", DIDT_ID_DebugFrame,
@@ -696,11 +723,11 @@ const DWARFDebugLoc *DWARFContext::getDe
return Loc.get();
}
-const DWARFDebugLocDWO *DWARFContext::getDebugLocDWO() {
+const DWARFDebugLoclists *DWARFContext::getDebugLocDWO() {
if (LocDWO)
return LocDWO.get();
- LocDWO.reset(new DWARFDebugLocDWO());
+ LocDWO.reset(new DWARFDebugLoclists());
// Assume all compile units have the same address byte size.
// FIXME: We don't need AddressSize for split DWARF since relocatable
// addresses cannot appear there. At the moment DWARFExpression requires it.
@@ -1213,6 +1240,7 @@ class DWARFObjInMemory final : public DW
DWARFSectionMap InfoSection;
DWARFSectionMap LocSection;
+ DWARFSectionMap LocListsSection;
DWARFSectionMap LineSection;
DWARFSectionMap RangeSection;
DWARFSectionMap RnglistsSection;
@@ -1234,6 +1262,7 @@ class DWARFObjInMemory final : public DW
return StringSwitch<DWARFSectionMap *>(Name)
.Case("debug_info", &InfoSection)
.Case("debug_loc", &LocSection)
+ .Case("debug_loclists", &LocListsSection)
.Case("debug_line", &LineSection)
.Case("debug_str_offsets", &StringOffsetSection)
.Case("debug_ranges", &RangeSection)
@@ -1529,6 +1558,7 @@ public:
StringRef getAbbrevSection() const override { return AbbrevSection; }
const DWARFSection &getLocSection() const override { return LocSection; }
+ const DWARFSection &getLoclistsSection() const override { return LocListsSection; }
StringRef getARangeSection() const override { return ARangeSection; }
StringRef getDebugFrameSection() const override { return DebugFrameSection; }
StringRef getEHFrameSection() const override { return EHFrameSection; }
Modified: llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp Mon Oct 22 04:30:54 2018
@@ -144,24 +144,39 @@ void DWARFDebugLoc::parse(const DWARFDat
WithColor::error() << "failed to consume entire .debug_loc section\n";
}
-Optional<DWARFDebugLocDWO::LocationList>
-DWARFDebugLocDWO::parseOneLocationList(DataExtractor Data, unsigned *Offset) {
+Optional<DWARFDebugLoclists::LocationList>
+DWARFDebugLoclists::parseOneLocationList(DataExtractor Data, unsigned *Offset) {
LocationList LL;
LL.Offset = *Offset;
// dwarf::DW_LLE_end_of_list_entry is 0 and indicates the end of the list.
while (auto Kind =
static_cast<dwarf::LocationListEntry>(Data.getU8(Offset))) {
- if (Kind != dwarf::DW_LLE_startx_length) {
+
+ Entry E;
+ E.Kind = Kind;
+ switch (Kind) {
+ case dwarf::DW_LLE_startx_length:
+ E.Value0 = Data.getULEB128(Offset);
+ E.Value1 = Data.getU32(Offset);
+ break;
+ case dwarf::DW_LLE_start_length:
+ E.Value0 = Data.getAddress(Offset);
+ E.Value1 = Data.getULEB128(Offset);
+ break;
+ case dwarf::DW_LLE_offset_pair:
+ E.Value0 = Data.getULEB128(Offset);
+ E.Value1 = Data.getULEB128(Offset);
+ break;
+ case dwarf::DW_LLE_base_address:
+ E.Value0 = Data.getAddress(Offset);
+ break;
+ default:
WithColor::error() << "dumping support for LLE of kind " << (int)Kind
<< " not implemented\n";
return None;
}
- Entry E;
- E.Start = Data.getULEB128(Offset);
- E.Length = Data.getU32(Offset);
-
unsigned Bytes = Data.getU16(Offset);
// A single location description describing the location of the object...
StringRef str = Data.getData().substr(*Offset, Bytes);
@@ -174,7 +189,7 @@ DWARFDebugLocDWO::parseOneLocationList(D
return LL;
}
-void DWARFDebugLocDWO::parse(DataExtractor data) {
+void DWARFDebugLoclists::parse(DataExtractor data) {
IsLittleEndian = data.isLittleEndian();
AddressSize = data.getAddressSize();
@@ -187,8 +202,8 @@ void DWARFDebugLocDWO::parse(DataExtract
}
}
-DWARFDebugLocDWO::LocationList const *
-DWARFDebugLocDWO::getLocationListAtOffset(uint64_t Offset) const {
+DWARFDebugLoclists::LocationList const *
+DWARFDebugLoclists::getLocationListAtOffset(uint64_t Offset) const {
auto It = std::lower_bound(
Locations.begin(), Locations.end(), Offset,
[](const LocationList &L, uint64_t Offset) { return L.Offset < Offset; });
@@ -197,23 +212,46 @@ DWARFDebugLocDWO::getLocationListAtOffse
return nullptr;
}
-void DWARFDebugLocDWO::LocationList::dump(raw_ostream &OS, bool IsLittleEndian,
- unsigned AddressSize,
- const MCRegisterInfo *MRI,
- unsigned Indent) const {
+void DWARFDebugLoclists::LocationList::dump(raw_ostream &OS, uint64_t BaseAddr,
+ bool IsLittleEndian,
+ unsigned AddressSize,
+ const MCRegisterInfo *MRI,
+ unsigned Indent) const {
for (const Entry &E : Entries) {
- OS << '\n';
- OS.indent(Indent);
- OS << "Addr idx " << E.Start << " (w/ length " << E.Length << "): ";
+ switch (E.Kind) {
+ case dwarf::DW_LLE_startx_length:
+ OS << '\n';
+ OS.indent(Indent);
+ OS << "Addr idx " << E.Value0 << " (w/ length " << E.Value1 << "): ";
+ break;
+ case dwarf::DW_LLE_start_length:
+ OS << '\n';
+ OS.indent(Indent);
+ OS << format("[0x%8.8x, 0x%8.8x): ", E.Value0, E.Value0 + E.Value1);
+ break;
+ case dwarf::DW_LLE_offset_pair:
+ OS << '\n';
+ OS.indent(Indent);
+ OS << format("[0x%8.8x, 0x%8.8x): ", BaseAddr + E.Value0,
+ BaseAddr + E.Value1);
+ break;
+ case dwarf::DW_LLE_base_address:
+ BaseAddr = E.Value0;
+ break;
+ default:
+ llvm_unreachable("unreachable locations list kind");
+ }
+
dumpExpression(OS, E.Loc, IsLittleEndian, AddressSize, MRI);
}
}
-void DWARFDebugLocDWO::dump(raw_ostream &OS, const MCRegisterInfo *MRI,
- Optional<uint64_t> Offset) const {
+void DWARFDebugLoclists::dump(raw_ostream &OS, uint64_t BaseAddr,
+ const MCRegisterInfo *MRI,
+ Optional<uint64_t> Offset) const {
auto DumpLocationList = [&](const LocationList &L) {
OS << format("0x%8.8x: ", L.Offset);
- L.dump(OS, IsLittleEndian, AddressSize, MRI, /*Indent=*/12);
+ L.dump(OS, BaseAddr, IsLittleEndian, AddressSize, MRI, /*Indent=*/12);
OS << "\n\n";
};
Modified: llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp?rev=344895&r1=344894&r2=344895&view=diff
==============================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp (original)
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFDie.cpp Mon Oct 22 04:30:54 2018
@@ -102,7 +102,7 @@ static void dumpLocation(raw_ostream &OS
FormValue.dump(OS, DumpOpts);
if (FormValue.isFormClass(DWARFFormValue::FC_SectionOffset)) {
uint32_t Offset = *FormValue.getAsSectionOffset();
- if (!U->isDWOUnit()) {
+ if (!U->isDWOUnit() && !U->getLocSection()->Data.empty()) {
DWARFDebugLoc DebugLoc;
DWARFDataExtractor Data(Obj, *U->getLocSection(), Ctx.isLittleEndian(),
Obj.getAddressSize());
@@ -115,11 +115,23 @@ static void dumpLocation(raw_ostream &OS
Indent);
} else
OS << "error extracting location list.";
- } else {
- DataExtractor Data(U->getLocSectionData(), Ctx.isLittleEndian(), 0);
- auto LL = DWARFDebugLocDWO::parseOneLocationList(Data, &Offset);
+ return;
+ }
+
+ StringRef LoclistsSectionData =
+ U->isDWOUnit() ? U->getLocSectionData() : Obj.getLoclistsSection().Data;
+ if (!LoclistsSectionData.empty()) {
+ DataExtractor Data(LoclistsSectionData, Ctx.isLittleEndian(),
+ Obj.getAddressSize());
+ auto LL = DWARFDebugLoclists::parseOneLocationList(Data, &Offset);
+
+ uint64_t BaseAddr = 0;
+ if (Optional<SectionedAddress> BA = U->getBaseAddress())
+ BaseAddr = BA->Address;
+
if (LL)
- LL->dump(OS, Ctx.isLittleEndian(), Obj.getAddressSize(), MRI, Indent);
+ LL->dump(OS, BaseAddr, Ctx.isLittleEndian(), Obj.getAddressSize(), MRI,
+ Indent);
else
OS << "error extracting location list.";
}
Added: llvm/trunk/test/DebugInfo/X86/dwarfdump-debug-loclists.test
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/dwarfdump-debug-loclists.test?rev=344895&view=auto
==============================================================================
--- llvm/trunk/test/DebugInfo/X86/dwarfdump-debug-loclists.test (added)
+++ llvm/trunk/test/DebugInfo/X86/dwarfdump-debug-loclists.test Mon Oct 22 04:30:54 2018
@@ -0,0 +1,168 @@
+# RUN: llvm-mc %s -filetype obj -triple x86_64-pc-linux -o %t.o
+# RUN: llvm-dwarfdump -v %t.o | FileCheck %s
+
+# CHECK: .debug_info
+# CHECK: DW_AT_name{{.*}}"stub"
+# CHECK: DW_AT_location [DW_FORM_sec_offset] (0x0000000c
+# CHECK-NEXT: [0x00000010, 0x00000020): DW_OP_breg5 RDI+0
+# CHECK-NEXT: [0x00000530, 0x00000540): DW_OP_breg6 RBP-8, DW_OP_deref
+# CHECK-NEXT: [0x00000700, 0x00000710): DW_OP_breg5 RDI+0
+
+# CHECK: .debug_loclists contents:
+# CHECK-NEXT: 0x00000000: locations list header: length = 0x00000031, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000
+# CHECK-NEXT: 0x00000000:
+# CHECK-NEXT: [0x00000000, 0x00000010): DW_OP_breg5 RDI+0
+# CHECK-NEXT: [0x00000530, 0x00000540): DW_OP_breg6 RBP-8, DW_OP_deref
+# CHECK-NEXT: [0x00000700, 0x00000710): DW_OP_breg5 RDI+0
+
+.section .debug_str,"MS", at progbits,1
+ .asciz "stub"
+
+.section .debug_str_offsets,"", at progbits
+ .long 68
+ .short 5
+ .short 0
+.Lstr_offsets_base0:
+ .zero 64
+
+.section .debug_loclists,"", at progbits
+ .long .Ldebug_loclist_table_end0-.Ldebug_loclist_table_start0
+.Ldebug_loclist_table_start0:
+ .short 5 # Version.
+ .byte 8 # Address size.
+ .byte 0 # Segmen selector size.
+ .long 0 # Offset entry count.
+.Lloclists_table_base0:
+.Ldebug_loc0:
+ .byte 4 # DW_LLE_offset_pair
+ .uleb128 0x0 # starting offset
+ .uleb128 0x10 # ending offset
+ .short 2 # Loc expr size
+ .byte 117 # DW_OP_breg5
+ .byte 0 # 0
+
+ .byte 6 # DW_LLE_base_address
+ .quad 0x500 # Some address
+ .short 0 # Loc expr size = 0.
+
+ .byte 4 # DW_LLE_offset_pair
+ .uleb128 0x30 # starting offset
+ .uleb128 0x40 # ending offset
+ .short 3 # Loc expr size
+ .byte 118 # DW_OP_breg6
+ .byte 120 # -8
+ .byte 6 # DW_OP_deref
+
+ .byte 8 # DW_LLE_start_length
+ .quad 0x700 # Some address
+ .uleb128 0x10 # length
+ .short 2 # Loc expr size
+ .byte 117 # DW_OP_breg5
+ .byte 0 # 0
+
+ .byte 0 # DW_LLE_end_of_list
+
+.Ldebug_loclist_table_end0:
+
+.section .debug_abbrev,"", at progbits
+ .byte 1 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .byte 37 # DW_FORM_strx1
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 114 # DW_AT_str_offsets_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 27 # DW_AT_comp_dir
+ .byte 37 # DW_FORM_strx1
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .ascii "\214\001" # DW_AT_loclists_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 2 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 1 # DW_FORM_addr
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 64 # DW_AT_frame_base
+ .byte 24 # DW_FORM_exprloc
+ .byte 110 # DW_AT_linkage_name
+ .byte 37 # DW_FORM_strx1
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 3 # Abbreviation Code
+ .byte 52 # DW_TAG_variable
+ .byte 0 # DW_CHILDREN_no
+ .byte 2 # DW_AT_location
+ .byte 23 # DW_FORM_sec_offset
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+.section .debug_info,"", at progbits
+.Lcu_begin0:
+ .long 70 # Length of Unit
+ .short 5 # DWARF version number
+ .byte 1 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .byte 1 # Abbrev [1] 0xc:0xef DW_TAG_compile_unit
+ .byte 0 # DW_AT_producer
+ .short 4 # DW_AT_language
+ .byte 1 # DW_AT_name
+ .long .Lstr_offsets_base0 # DW_AT_str_offsets_base
+ .long .Lline_table_start0 # DW_AT_stmt_list
+ .byte 2 # DW_AT_comp_dir
+ .quad 0x10 # DW_AT_low_pc
+ .long 0 # DW_AT_high_pc
+ .long .Lloclists_table_base0 # DW_AT_loclists_base
+ .byte 2 # Abbrev [2] 0x2a:0x20 DW_TAG_subprogram
+ .quad 0 # DW_AT_low_pc
+ .long 0 # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 86
+ .byte 11 # DW_AT_linkage_name
+ .byte 12 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 6 # DW_AT_decl_line
+ # DW_AT_external
+ .byte 3 # Abbrev [3] 0x40:0xb DW_TAG_variable
+ .long .Ldebug_loc0 # DW_AT_location
+ .byte 7 # DW_AT_name
+ .byte 1 # DW_AT_decl_file
+ .byte 6 # DW_AT_decl_line
+ .long 76 # DW_AT_type
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+ .byte 0 # End Of Children Mark
+
+.section .debug_line,"", at progbits
+.Lline_table_start0:
+
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