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Add a ELFSectionRef class and use it to expose getSectionType.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240778 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-06-26 12:33:37 +00:00
parent 50bea40e8e
commit db7a9f12bc
2 changed files with 23 additions and 8 deletions
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25
include/llvm/Object/ELFObjectFile.h
View File

@ -40,12 +40,14 @@ class ELFSymbolRef;
class ELFObjectFileBase : public ObjectFile {
friend class ELFSymbolRef;
friend class ELFSectionRef;
protected:
ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
public:
virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
@ -58,13 +60,27 @@ public:
virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
virtual uint64_t getSectionFlags(SectionRef Sec) const = 0;
virtual uint32_t getSectionType(SectionRef Sec) const = 0;
elf_symbol_iterator_range symbols() const;
static inline bool classof(const Binary *v) { return v->isELF(); }
};
class ELFSectionRef : public SectionRef {
public:
ELFSectionRef(const SectionRef &B) : SectionRef(B) {
assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
}
const ELFObjectFileBase *getObject() const {
return cast<ELFObjectFileBase>(SectionRef::getObject());
}
uint32_t getType() const {
return getObject()->getSectionType(getRawDataRefImpl());
}
};
class ELFSymbolRef : public SymbolRef {
public:
ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
@ -170,6 +186,7 @@ protected:
getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
uint32_t getSectionType(DataRefImpl Sec) const override;
uint64_t getROffset(DataRefImpl Rel) const;
StringRef getRelocationTypeName(uint32_t Type) const;
@ -263,7 +280,6 @@ public:
bool hasRelocationAddend(DataRefImpl Rel) const override;
uint64_t getSectionFlags(SectionRef Sec) const override;
uint32_t getSectionType(SectionRef Sec) const override;
uint8_t getBytesInAddress() const override;
StringRef getFileFormatName() const override;
@ -315,9 +331,8 @@ uint64_t ELFObjectFile<ELFT>::getSectionFlags(SectionRef Sec) const {
}
template <class ELFT>
uint32_t ELFObjectFile<ELFT>::getSectionType(SectionRef Sec) const {
DataRefImpl DRI = Sec.getRawDataRefImpl();
return toELFShdrIter(DRI)->sh_type;
uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
return toELFShdrIter(Sec)->sh_type;
}
template <class ELFT>

6
lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
View File

@ -306,10 +306,10 @@ static bool isReadOnlyData(const SectionRef &Section) {
return false;
}
static bool isZeroInit(const SectionRef &Section) {
static bool isZeroInit(const SectionRef Section) {
const ObjectFile *Obj = Section.getObject();
if (auto *ELFObj = dyn_cast<object::ELFObjectFileBase>(Obj))
return ELFObj->getSectionType(Section) == ELF::SHT_NOBITS;
if (isa<object::ELFObjectFileBase>(Obj))
return ELFSectionRef(Section).getType() == ELF::SHT_NOBITS;
if (auto *COFFObj = dyn_cast<object::COFFObjectFile>(Obj))
return COFFObj->getCOFFSection(Section)->Characteristics &
COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;