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Object: Add isSymbolAbsolute and getSymbolSection.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142317 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2011-10-17 23:54:46 +00:00
parent c38c36a8c4
commit 9b2b812fea
6 changed files with 163 additions and 49 deletions
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3
include/llvm/Object/COFF.h
View File

@ -108,6 +108,9 @@ protected:
virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;

3
include/llvm/Object/MachO.h
View File

@ -56,6 +56,9 @@ protected:
virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;

118
include/llvm/Object/ObjectFile.h
View File

@ -78,55 +78,7 @@ static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
}
/// SymbolRef - This is a value type class that represents a single symbol in
/// the list of symbols in the object file.
class SymbolRef {
friend class SectionRef;
DataRefImpl SymbolPimpl;
const ObjectFile *OwningObject;
public:
SymbolRef() : OwningObject(NULL) {
std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
}
enum Type {
ST_Function,
ST_Data,
ST_External, // Defined in another object file
ST_Other
};
SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
bool operator==(const SymbolRef &Other) const;
error_code getNext(SymbolRef &Result) const;
error_code getName(StringRef &Result) const;
error_code getAddress(uint64_t &Result) const;
error_code getOffset(uint64_t &Result) const;
error_code getSize(uint64_t &Result) const;
error_code getType(SymbolRef::Type &Result) const;
/// Returns the ascii char that should be displayed in a symbol table dump via
/// nm for this symbol.
error_code getNMTypeChar(char &Result) const;
/// Returns true for symbols that are internal to the object file format such
/// as section symbols.
error_code isInternal(bool &Result) const;
/// Returns true for symbols that can be used in another objects,
/// such as library functions
error_code isGlobal(bool &Result) const;
/// Returns true for weak symbols.
error_code isWeak(bool &Result) const;
DataRefImpl getRawDataRefImpl() const;
};
typedef content_iterator<SymbolRef> symbol_iterator;
class SymbolRef;
/// RelocationRef - This is a value type class that represents a single
/// relocation in the list of relocations in the object file.
@ -201,6 +153,63 @@ public:
};
typedef content_iterator<SectionRef> section_iterator;
/// SymbolRef - This is a value type class that represents a single symbol in
/// the list of symbols in the object file.
class SymbolRef {
friend class SectionRef;
DataRefImpl SymbolPimpl;
const ObjectFile *OwningObject;
public:
SymbolRef() : OwningObject(NULL) {
std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
}
enum Type {
ST_Function,
ST_Data,
ST_External, // Defined in another object file
ST_Other
};
SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
bool operator==(const SymbolRef &Other) const;
error_code getNext(SymbolRef &Result) const;
error_code getName(StringRef &Result) const;
error_code getAddress(uint64_t &Result) const;
error_code getOffset(uint64_t &Result) const;
error_code getSize(uint64_t &Result) const;
error_code getType(SymbolRef::Type &Result) const;
/// Returns the ascii char that should be displayed in a symbol table dump via
/// nm for this symbol.
error_code getNMTypeChar(char &Result) const;
/// Returns true for symbols that are internal to the object file format such
/// as section symbols.
error_code isInternal(bool &Result) const;
/// Returns true for symbols that can be used in another objects,
/// such as library functions
error_code isGlobal(bool &Result) const;
/// Returns true for weak symbols.
error_code isWeak(bool &Result) const;
/// @brief Return true for absolute symbols.
error_code isAbsolute(bool &Result) const;
/// @brief Get section this symbol is defined in reference to. Result is
/// end_sections() if it is undefined or is an absolute symbol.
error_code getSection(section_iterator &Result) const;
DataRefImpl getRawDataRefImpl() const;
};
typedef content_iterator<SymbolRef> symbol_iterator;
const uint64_t UnknownAddressOrSize = ~0ULL;
/// ObjectFile - This class is the base class for all object file types.
@ -238,6 +247,9 @@ protected:
virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const = 0;
virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const = 0;
virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const = 0;
virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const = 0;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const = 0;
// Same as above for SectionRef.
friend class SectionRef;
@ -352,6 +364,14 @@ inline error_code SymbolRef::isWeak(bool &Result) const {
return OwningObject->isSymbolWeak(SymbolPimpl, Result);
}
inline error_code SymbolRef::isAbsolute(bool &Result) const {
return OwningObject->isSymbolAbsolute(SymbolPimpl, Result);
}
inline error_code SymbolRef::getSection(section_iterator &Result) const {
return OwningObject->getSymbolSection(SymbolPimpl, Result);
}
inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
return OwningObject->getSymbolType(SymbolPimpl, Result);
}

22
lib/Object/COFFObjectFile.cpp
View File

@ -268,6 +268,28 @@ error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
return object_error::success;
}
error_code COFFObjectFile::isSymbolAbsolute(DataRefImpl Symb,
bool &Result) const {
const coff_symbol *symb = toSymb(Symb);
Result = symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE;
return object_error::success;
}
error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
section_iterator &Result) const {
const coff_symbol *symb = toSymb(Symb);
if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED)
Result = end_sections();
else {
const coff_section *sec;
if (error_code ec = getSection(symb->SectionNumber, sec)) return ec;
DataRefImpl Sec;
Sec.p = reinterpret_cast<uintptr_t>(sec);
Result = section_iterator(SectionRef(Sec, this));
}
return object_error::success;
}
error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
SectionRef &Result) const {
const coff_section *sec = toSec(Sec);

29
lib/Object/ELFObjectFile.cpp
View File

@ -333,6 +333,9 @@ protected:
virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
@ -653,6 +656,32 @@ error_code ELFObjectFile<target_endianness, is64Bits>
return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
::isSymbolAbsolute(DataRefImpl Symb, bool &Res) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
Res = symb->st_shndx == ELF::SHN_ABS;
return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
::getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
const Elf_Shdr *sec = getSection(symb);
if (!sec)
Res = end_sections();
else {
DataRefImpl Sec;
Sec.p = reinterpret_cast<intptr_t>(sec);
Res = section_iterator(SectionRef(Sec, this));
}
return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
::isSymbolInternal(DataRefImpl Symb,

37
lib/Object/MachOObjectFile.cpp
View File

@ -242,6 +242,43 @@ error_code MachOObjectFile::isSymbolWeak(DataRefImpl Symb, bool &Res) const {
return object_error::success;
}
error_code MachOObjectFile::isSymbolAbsolute(DataRefImpl Symb, bool &Res) const{
uint8_t n_type;
if (MachOObj->is64Bit()) {
InMemoryStruct<macho::Symbol64TableEntry> Entry;
getSymbol64TableEntry(Symb, Entry);
n_type = Entry->Type;
} else {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(Symb, Entry);
n_type = Entry->Type;
}
Res = (n_type & MachO::NlistMaskType) == MachO::NListTypeAbsolute;
return object_error::success;
}
error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const {
uint8_t index;
if (MachOObj->is64Bit()) {
InMemoryStruct<macho::Symbol64TableEntry> Entry;
getSymbol64TableEntry(Symb, Entry);
index = Entry->SectionIndex;
} else {
InMemoryStruct<macho::SymbolTableEntry> Entry;
getSymbolTableEntry(Symb, Entry);
index = Entry->SectionIndex;
}
if (index == 0)
Res = end_sections();
else
Res = section_iterator(SectionRef(Sections[index], this));
return object_error::success;
}
error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
SymbolRef::Type &Res) const {
uint8_t n_type;