[lld] r236873 - [ARM] Generation of .ARM.exidx/.ARM.extab sections
Leny Kholodov
lkholodov at accesssoftek.com
Fri May 8 09:04:11 PDT 2015
Author: lkholodov
Date: Fri May 8 11:04:11 2015
New Revision: 236873
URL: http://llvm.org/viewvc/llvm-project?rev=236873&view=rev
Log:
[ARM] Generation of .ARM.exidx/.ARM.extab sections
This patch provides generation of .ARM.exidx & .ARM.extab sections which are
used for unwinding. The patch adds new content type typeARMExidx for atoms from
.ARM.exidx section and integration of atoms with such type to the ELF
ReaderWriter. exidx.test has been added with checking of contents of .ARM.exidx
section and .ARM.extab section.
Differential Revision: http://reviews.llvm.org/D9324
Added:
lld/trunk/test/elf/ARM/exidx.test
Modified:
lld/trunk/include/lld/Core/DefinedAtom.h
lld/trunk/lib/Core/DefinedAtom.cpp
lld/trunk/lib/ReaderWriter/ELF/ARM/ARMExecutableWriter.h
lld/trunk/lib/ReaderWriter/ELF/ARM/ARMSymbolTable.h
lld/trunk/lib/ReaderWriter/ELF/ARM/ARMTargetHandler.h
lld/trunk/lib/ReaderWriter/ELF/Atoms.cpp
lld/trunk/lib/ReaderWriter/ELF/ExecutableWriter.h
lld/trunk/lib/ReaderWriter/ELF/TargetLayout.h
Modified: lld/trunk/include/lld/Core/DefinedAtom.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/include/lld/Core/DefinedAtom.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/include/lld/Core/DefinedAtom.h (original)
+++ lld/trunk/include/lld/Core/DefinedAtom.h Fri May 8 11:04:11 2015
@@ -151,6 +151,7 @@ public:
typeNoAlloc, // Identifies non allocatable sections [ELF]
typeGroupComdat, // Identifies a section group [ELF, COFF]
typeGnuLinkOnce, // Identifies a gnu.linkonce section [ELF]
+ typeARMExidx, // Identifies a ARM_EXIDX section [ELF/ARM]
};
// Permission bits for atoms and segments. The order of these values are
Modified: lld/trunk/lib/Core/DefinedAtom.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/Core/DefinedAtom.cpp?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/Core/DefinedAtom.cpp (original)
+++ lld/trunk/lib/Core/DefinedAtom.cpp Fri May 8 11:04:11 2015
@@ -43,6 +43,7 @@ DefinedAtom::ContentPermissions DefinedA
case typeProcessedUnwindInfo:
case typeRONote:
case typeNoAlloc:
+ case typeARMExidx:
return permR__;
case typeData:
Modified: lld/trunk/lib/ReaderWriter/ELF/ARM/ARMExecutableWriter.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/ARM/ARMExecutableWriter.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/ARM/ARMExecutableWriter.h (original)
+++ lld/trunk/lib/ReaderWriter/ELF/ARM/ARMExecutableWriter.h Fri May 8 11:04:11 2015
@@ -67,7 +67,13 @@ void ARMExecutableWriter::finalizeDefaul
else
gotAtom->_virtualAddr = 0;
}
- // TODO: resolve addresses of __exidx_start/_end atoms
+
+ // Set required by gcc libc __ehdr_start symbol with pointer to ELF header
+ if (auto ehdr = _armLayout.findAbsoluteAtom("__ehdr_start"))
+ ehdr->_virtualAddr = _elfHeader->virtualAddr();
+
+ // Set required by gcc libc symbols __exidx_start/__exidx_end
+ updateScopeAtomValues("exidx", ".ARM.exidx");
}
unique_bump_ptr<SymbolTable<ELF32LE>> ARMExecutableWriter::createSymbolTable() {
@@ -82,6 +88,8 @@ void ARMExecutableWriter::processUndefin
} else if (symName.startswith("__exidx")) {
file.addAbsoluteAtom("__exidx_start");
file.addAbsoluteAtom("__exidx_end");
+ } else if (symName == "__ehdr_start") {
+ file.addAbsoluteAtom("__ehdr_start");
}
}
Modified: lld/trunk/lib/ReaderWriter/ELF/ARM/ARMSymbolTable.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/ARM/ARMSymbolTable.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/ARM/ARMSymbolTable.h (original)
+++ lld/trunk/lib/ReaderWriter/ELF/ARM/ARMSymbolTable.h Fri May 8 11:04:11 2015
@@ -31,6 +31,9 @@ void ARMSymbolTable::addDefinedAtom(Elf_
int64_t addr) {
SymbolTable::addDefinedAtom(sym, da, addr);
+ if (da->contentType() == DefinedAtom::typeARMExidx)
+ sym.st_value = addr;
+
// Set zero bit to distinguish real symbols addressing Thumb instructions.
// Don't care about mapping symbols like $t and others.
if (DefinedAtom::codeARMThumb == da->codeModel())
Modified: lld/trunk/lib/ReaderWriter/ELF/ARM/ARMTargetHandler.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/ARM/ARMTargetHandler.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/ARM/ARMTargetHandler.h (original)
+++ lld/trunk/lib/ReaderWriter/ELF/ARM/ARMTargetHandler.h Fri May 8 11:04:11 2015
@@ -20,10 +20,89 @@ class ELFLinkingContext;
namespace elf {
+/// \brief ARM specific section (.ARM.exidx) with indexes to exception handlers
+class ARMExidxSection : public AtomSection<ELF32LE> {
+ typedef AtomSection<ELF32LE> Base;
+
+public:
+ ARMExidxSection(const ELFLinkingContext &ctx, StringRef sectionName,
+ int32_t permissions, int32_t order)
+ : Base(ctx, sectionName, DefinedAtom::typeARMExidx, permissions, order) {
+ this->_type = SHT_ARM_EXIDX;
+ this->_isLoadedInMemory = true;
+ }
+
+ bool hasOutputSegment() const override { return true; }
+
+ const AtomLayout *appendAtom(const Atom *atom) override {
+ const DefinedAtom *definedAtom = cast<DefinedAtom>(atom);
+ assert(atom->contentType() == DefinedAtom::typeARMExidx &&
+ "atom content type for .ARM.exidx section has to be typeARMExidx");
+
+ DefinedAtom::Alignment atomAlign = definedAtom->alignment();
+ uint64_t fOffset = alignOffset(this->fileSize(), atomAlign);
+ uint64_t mOffset = alignOffset(this->memSize(), atomAlign);
+
+ _atoms.push_back(new (_alloc) AtomLayout(atom, fOffset, 0));
+ this->_fsize = fOffset + definedAtom->size();
+ this->_msize = mOffset + definedAtom->size();
+ DEBUG_WITH_TYPE("Section", llvm::dbgs()
+ << "[" << this->name() << " " << this << "] "
+ << "Adding atom: " << atom->name() << "@"
+ << fOffset << "\n");
+
+ uint64_t alignment = atomAlign.value;
+ if (this->_alignment < alignment)
+ this->_alignment = alignment;
+
+ return _atoms.back();
+ }
+};
+
class ARMTargetLayout : public TargetLayout<ELF32LE> {
public:
ARMTargetLayout(ELFLinkingContext &ctx) : TargetLayout(ctx) {}
+ SectionOrder getSectionOrder(StringRef name, int32_t contentType,
+ int32_t contentPermissions) override {
+ switch (contentType) {
+ case DefinedAtom::typeARMExidx:
+ return ORDER_ARM_EXIDX;
+ default:
+ return TargetLayout::getSectionOrder(name, contentType,
+ contentPermissions);
+ }
+ }
+
+ StringRef getOutputSectionName(StringRef archivePath, StringRef memberPath,
+ StringRef inputSectionName) const override {
+ return llvm::StringSwitch<StringRef>(inputSectionName)
+ .StartsWith(".ARM.exidx", ".ARM.exidx")
+ .StartsWith(".ARM.extab", ".ARM.extab")
+ .Default(TargetLayout::getOutputSectionName(archivePath, memberPath,
+ inputSectionName));
+ }
+
+ SegmentType getSegmentType(Section<ELF32LE> *section) const override {
+ switch (section->order()) {
+ case ORDER_ARM_EXIDX:
+ return llvm::ELF::PT_ARM_EXIDX;
+ default:
+ return TargetLayout::getSegmentType(section);
+ }
+ }
+
+ AtomSection<ELF32LE> *
+ createSection(StringRef name, int32_t contentType,
+ DefinedAtom::ContentPermissions contentPermissions,
+ SectionOrder sectionOrder) override {
+ if (contentType == DefinedAtom::typeARMExidx)
+ return new ARMExidxSection(_ctx, name, contentPermissions, sectionOrder);
+
+ return TargetLayout::createSection(name, contentType, contentPermissions,
+ sectionOrder);
+ }
+
uint64_t getGOTSymAddr() {
std::call_once(_gotSymOnce, [this]() {
if (AtomLayout *gotAtom = findAbsoluteAtom("_GLOBAL_OFFSET_TABLE_"))
Modified: lld/trunk/lib/ReaderWriter/ELF/Atoms.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/Atoms.cpp?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/Atoms.cpp (original)
+++ lld/trunk/lib/ReaderWriter/ELF/Atoms.cpp Fri May 8 11:04:11 2015
@@ -84,6 +84,8 @@ DefinedAtom::ContentType ELFDefinedAtom<
if (_symbol->st_shndx == SHN_COMMON)
return _contentType = typeZeroFill;
+ if (_section->sh_type == SHT_ARM_EXIDX)
+ return typeARMExidx;
if (_section->sh_type == SHT_PROGBITS) {
flags &= ~SHF_ALLOC;
flags &= ~SHF_GROUP;
@@ -216,6 +218,9 @@ DefinedAtom::ContentPermissions ELFDefin
case llvm::ELF::SHT_FINI_ARRAY:
return _permissions = permRW_;
+ case llvm::ELF::SHT_ARM_EXIDX:
+ return _permissions = permR__;
+
default:
return _permissions = perm___;
}
Modified: lld/trunk/lib/ReaderWriter/ELF/ExecutableWriter.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/ExecutableWriter.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/ExecutableWriter.h (original)
+++ lld/trunk/lib/ReaderWriter/ELF/ExecutableWriter.h Fri May 8 11:04:11 2015
@@ -26,6 +26,7 @@ public:
: OutputELFWriter<ELFT>(ctx, layout) {}
protected:
+ void updateScopeAtomValues(StringRef sym, StringRef sec);
void buildDynamicSymbolTable(const File &file) override;
void createImplicitFiles(std::vector<std::unique_ptr<File>> &) override;
void finalizeDefaultAtomValues() override;
@@ -44,6 +45,25 @@ private:
//===----------------------------------------------------------------------===//
// ExecutableWriter
//===----------------------------------------------------------------------===//
+template <class ELFT>
+void ExecutableWriter<ELFT>::updateScopeAtomValues(StringRef sym,
+ StringRef sec) {
+ std::string start = ("__" + sym + "_start").str();
+ std::string end = ("__" + sym + "_end").str();
+ AtomLayout *s = this->_layout.findAbsoluteAtom(start);
+ AtomLayout *e = this->_layout.findAbsoluteAtom(end);
+ OutputSection<ELFT> *section = this->_layout.findOutputSection(sec);
+ if (!s || !e)
+ return;
+ if (section) {
+ s->_virtualAddr = section->virtualAddr();
+ e->_virtualAddr = section->virtualAddr() + section->memSize();
+ } else {
+ s->_virtualAddr = 0;
+ e->_virtualAddr = 0;
+ }
+}
+
template<class ELFT>
void ExecutableWriter<ELFT>::buildDynamicSymbolTable(const File &file) {
for (auto sec : this->_layout.sections())
@@ -127,28 +147,13 @@ template <class ELFT> void ExecutableWri
assert((bssStartAtom || bssEndAtom || underScoreEndAtom || endAtom) &&
"Unable to find the absolute atoms that have been added by lld");
- auto startEnd = [&](StringRef sym, StringRef sec) -> void {
- std::string start = ("__" + sym + "_start").str();
- std::string end = ("__" + sym + "_end").str();
- AtomLayout *s = this->_layout.findAbsoluteAtom(start);
- AtomLayout *e = this->_layout.findAbsoluteAtom(end);
- OutputSection<ELFT> *section = this->_layout.findOutputSection(sec);
- if (section) {
- s->_virtualAddr = section->virtualAddr();
- e->_virtualAddr = section->virtualAddr() + section->memSize();
- } else {
- s->_virtualAddr = 0;
- e->_virtualAddr = 0;
- }
- };
-
- startEnd("preinit_array", ".preinit_array");
- startEnd("init_array", ".init_array");
+ updateScopeAtomValues("preinit_array", ".preinit_array");
+ updateScopeAtomValues("init_array", ".init_array");
if (this->_ctx.isRelaOutputFormat())
- startEnd("rela_iplt", ".rela.plt");
+ updateScopeAtomValues("rela_iplt", ".rela.plt");
else
- startEnd("rel_iplt", ".rel.plt");
- startEnd("fini_array", ".fini_array");
+ updateScopeAtomValues("rel_iplt", ".rel.plt");
+ updateScopeAtomValues("fini_array", ".fini_array");
auto bssSection = this->_layout.findOutputSection(".bss");
Modified: lld/trunk/lib/ReaderWriter/ELF/TargetLayout.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/ELF/TargetLayout.h?rev=236873&r1=236872&r2=236873&view=diff
==============================================================================
--- lld/trunk/lib/ReaderWriter/ELF/TargetLayout.h (original)
+++ lld/trunk/lib/ReaderWriter/ELF/TargetLayout.h Fri May 8 11:04:11 2015
@@ -52,6 +52,7 @@ public:
ORDER_FINI = 90,
ORDER_REL = 95,
ORDER_RODATA = 100,
+ ORDER_ARM_EXIDX = 105,
ORDER_EH_FRAME = 110,
ORDER_EH_FRAMEHDR = 120,
ORDER_TDATA = 124,
Added: lld/trunk/test/elf/ARM/exidx.test
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/elf/ARM/exidx.test?rev=236873&view=auto
==============================================================================
--- lld/trunk/test/elf/ARM/exidx.test (added)
+++ lld/trunk/test/elf/ARM/exidx.test Fri May 8 11:04:11 2015
@@ -0,0 +1,254 @@
+# .ARM.exidx contents checking
+# RUN: yaml2obj -format=elf %s > %t.o
+# RUN: lld -flavor gnu -target arm-none-linux-eabi -static -o %t %t.o
+# RUN: llvm-objdump -s -t -section-headers %t | FileCheck %s
+#
+# CHECK: Sections:
+# CHECK: Idx Name Size Address Type
+# CHECK: 2 .ARM.extab 0000000c 00000000004000b4 DATA
+# CHECK: 3 .ARM.exidx 00000018 00000000004000c0
+# CHECK: Contents of section .text:
+# CHECK: 4000a4 1846aff3 00801846 0837bd46 80bd00bf
+# ^
+# 4000b0: bd80 pop {r7, pc}
+# CHECK: Contents of section .ARM.extab:
+# CHECK: 4000b4 01970181 b0b00884 00000000
+# CHECK: Contents of section .ARM.exidx:
+# CHECK: 4000c0 b4ffff7f 08809780 bcffff7f 08809780
+# ^ offset to 400074 (__aeabi_unwind_cpp_pr0)
+# CHECK: 4000d0 c4ffff7f e0ffff7f
+# ^ ^
+# offset to 400094 (_start) handler at 4000B0
+#
+# CHECK: SYMBOL TABLE:
+# CHECK: 004000b4 .ARM.extab 00000000 $d.2
+# CHECK: 004000c0 .ARM.exidx 00000000 $d.1
+# CHECK: 00400074 g F .text 00000010 __aeabi_unwind_cpp_pr0
+# CHECK: 00400094 g F .text 00000020 _start
+
+---
+FileHeader:
+ Class: ELFCLASS32
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_ARM
+ Flags: [ EF_ARM_EABI_VER5 ]
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ AddressAlign: 0x0000000000000004
+ Content: 80B400AF00231846BD465DF8047B704780B400AF00231846BD465DF8047B704780B582B000AF3B1D1846FFF7FEFF3B1D1846FFF7FEFF18460837BD4680BD00BF
+ - Name: .rel.text
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .text
+ Relocations:
+ - Offset: 0x000000000000002A
+ Symbol: _ZN1AILi1EEC1Ev
+ Type: R_ARM_THM_CALL
+ - Offset: 0x0000000000000032
+ Symbol: _ZN1AILi1EED1Ev
+ Type: R_ARM_THM_CALL
+ - Name: .ARM.extab
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC ]
+ AddressAlign: 0x0000000000000004
+ Content: 01970181B0B0088400000000
+ - Name: .ARM.exidx
+ Type: SHT_ARM_EXIDX
+ Flags: [ SHF_ALLOC, SHF_LINK_ORDER ]
+ Link: .text
+ AddressAlign: 0x0000000000000004
+ Content: '000000000880978010000000088097802000000000000000'
+ - Name: .rel.ARM.exidx
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .ARM.exidx
+ Relocations:
+ - Offset: 0x0000000000000000
+ Symbol: .text
+ Type: R_ARM_PREL31
+ - Offset: 0x0000000000000000
+ Symbol: __aeabi_unwind_cpp_pr0
+ Type: R_ARM_NONE
+ - Offset: 0x0000000000000008
+ Symbol: .text
+ Type: R_ARM_PREL31
+ - Offset: 0x0000000000000010
+ Symbol: .text
+ Type: R_ARM_PREL31
+ - Offset: 0x0000000000000010
+ Symbol: __aeabi_unwind_cpp_pr1
+ Type: R_ARM_NONE
+ - Offset: 0x0000000000000014
+ Symbol: .ARM.extab
+ Type: R_ARM_PREL31
+ - Name: .text._ZN1AILi1EEC2Ev
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR, SHF_GROUP ]
+ AddressAlign: 0x0000000000000004
+ Content: 80B582B000AF78600120FFF7FEFF7B6818460837BD4680BD
+ - Name: .rel.text._ZN1AILi1EEC2Ev
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .text._ZN1AILi1EEC2Ev
+ Relocations:
+ - Offset: 0x000000000000000A
+ Symbol: f
+ Type: R_ARM_THM_CALL
+ - Name: .ARM.extab.text._ZN1AILi1EEC2Ev
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_GROUP ]
+ AddressAlign: 0x0000000000000004
+ Content: 01970181B0B0088400000000
+ - Name: .ARM.exidx.text._ZN1AILi1EEC2Ev
+ Type: SHT_ARM_EXIDX
+ Flags: [ SHF_ALLOC, SHF_LINK_ORDER, SHF_GROUP ]
+ Link: .text._ZN1AILi1EEC2Ev
+ AddressAlign: 0x0000000000000004
+ Content: '0000000000000000'
+ - Name: .rel.ARM.exidx.text._ZN1AILi1EEC2Ev
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .ARM.exidx.text._ZN1AILi1EEC2Ev
+ Relocations:
+ - Offset: 0x0000000000000000
+ Symbol: .text._ZN1AILi1EEC2Ev
+ Type: R_ARM_PREL31
+ - Offset: 0x0000000000000000
+ Symbol: __aeabi_unwind_cpp_pr1
+ Type: R_ARM_NONE
+ - Offset: 0x0000000000000004
+ Symbol: .ARM.extab.text._ZN1AILi1EEC2Ev
+ Type: R_ARM_PREL31
+ - Name: .text._ZN1AILi1EED2Ev
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR, SHF_GROUP ]
+ AddressAlign: 0x0000000000000004
+ Content: 80B582B000AF78604FF0FF30FFF7FEFF7B6818460837BD4680BD00BF
+ - Name: .rel.text._ZN1AILi1EED2Ev
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .text._ZN1AILi1EED2Ev
+ Relocations:
+ - Offset: 0x000000000000000C
+ Symbol: f
+ Type: R_ARM_THM_CALL
+ - Name: .ARM.extab.text._ZN1AILi1EED2Ev
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_GROUP ]
+ AddressAlign: 0x0000000000000004
+ Content: 01970181B0B0088400000000
+ - Name: .ARM.exidx.text._ZN1AILi1EED2Ev
+ Type: SHT_ARM_EXIDX
+ Flags: [ SHF_ALLOC, SHF_LINK_ORDER, SHF_GROUP ]
+ Link: .text._ZN1AILi1EED2Ev
+ AddressAlign: 0x0000000000000004
+ Content: '0000000000000000'
+ - Name: .rel.ARM.exidx.text._ZN1AILi1EED2Ev
+ Type: SHT_REL
+ Link: .symtab
+ AddressAlign: 0x0000000000000004
+ Info: .ARM.exidx.text._ZN1AILi1EED2Ev
+ Relocations:
+ - Offset: 0x0000000000000000
+ Symbol: .text._ZN1AILi1EED2Ev
+ Type: R_ARM_PREL31
+ - Offset: 0x0000000000000000
+ Symbol: __aeabi_unwind_cpp_pr1
+ Type: R_ARM_NONE
+ - Offset: 0x0000000000000004
+ Symbol: .ARM.extab.text._ZN1AILi1EED2Ev
+ Type: R_ARM_PREL31
+Symbols:
+ Local:
+ - Name: .text
+ Type: STT_SECTION
+ Section: .text
+ - Name: '$t.1'
+ Section: .text
+ - Name: .ARM.extab
+ Type: STT_SECTION
+ Section: .ARM.extab
+ - Name: .ARM.exidx
+ Type: STT_SECTION
+ Section: .ARM.exidx
+ - Name: '$d.1'
+ Section: .ARM.exidx
+ - Name: '$d.2'
+ Section: .ARM.extab
+ - Name: .text._ZN1AILi1EEC2Ev
+ Type: STT_SECTION
+ Section: .text._ZN1AILi1EEC2Ev
+ - Name: '$t.2'
+ Section: .text._ZN1AILi1EEC2Ev
+ - Name: .ARM.extab.text._ZN1AILi1EEC2Ev
+ Type: STT_SECTION
+ Section: .ARM.extab.text._ZN1AILi1EEC2Ev
+ - Name: '$d.3'
+ Section: .ARM.extab.text._ZN1AILi1EEC2Ev
+ - Name: .ARM.exidx.text._ZN1AILi1EEC2Ev
+ Type: STT_SECTION
+ Section: .ARM.exidx.text._ZN1AILi1EEC2Ev
+ - Name: '$d.4'
+ Section: .ARM.exidx.text._ZN1AILi1EEC2Ev
+ - Name: .text._ZN1AILi1EED2Ev
+ Type: STT_SECTION
+ Section: .text._ZN1AILi1EED2Ev
+ - Name: '$t.3'
+ Section: .text._ZN1AILi1EED2Ev
+ - Name: .ARM.extab.text._ZN1AILi1EED2Ev
+ Type: STT_SECTION
+ Section: .ARM.extab.text._ZN1AILi1EED2Ev
+ - Name: '$d.5'
+ Section: .ARM.extab.text._ZN1AILi1EED2Ev
+ - Name: .ARM.exidx.text._ZN1AILi1EED2Ev
+ Type: STT_SECTION
+ Section: .ARM.exidx.text._ZN1AILi1EED2Ev
+ - Name: '$d.6'
+ Section: .ARM.exidx.text._ZN1AILi1EED2Ev
+ Global:
+ - Name: __aeabi_unwind_cpp_pr0
+ Type: STT_FUNC
+ Section: .text
+ Value: 0x0000000000000001
+ Size: 0x0000000000000010
+ - Name: __aeabi_unwind_cpp_pr1
+ Type: STT_FUNC
+ Section: .text
+ Value: 0x0000000000000011
+ Size: 0x0000000000000010
+ - Name: _start
+ Type: STT_FUNC
+ Section: .text
+ Value: 0x0000000000000021
+ Size: 0x000000000000001E
+ Weak:
+ - Name: _ZN1AILi1EEC1Ev
+ Type: STT_FUNC
+ Section: .text._ZN1AILi1EEC2Ev
+ Value: 0x0000000000000001
+ Size: 0x0000000000000018
+ - Name: _ZN1AILi1EED1Ev
+ Type: STT_FUNC
+ Section: .text._ZN1AILi1EED2Ev
+ Value: 0x0000000000000001
+ Size: 0x000000000000001A
+ - Name: _ZN1AILi1EEC2Ev
+ Type: STT_FUNC
+ Section: .text._ZN1AILi1EEC2Ev
+ Value: 0x0000000000000001
+ Size: 0x0000000000000018
+ - Name: f
+ - Name: _ZN1AILi1EED2Ev
+ Type: STT_FUNC
+ Section: .text._ZN1AILi1EED2Ev
+ Value: 0x0000000000000001
+ Size: 0x000000000000001A
+...
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