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Add interface for querying object files for symbol values.

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Currently only implemented for ELF.

Patch by Amara Emerson.

llvm-svn: 166918
This commit is contained in:
Tim Northover 2012-10-29 10:47:00 +00:00
parent c0670f92a5
commit 86db334e17
6 changed files with 30 additions and 0 deletions
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1
include/llvm/Object/COFF.h
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@ -116,6 +116,7 @@ protected:
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;

11
include/llvm/Object/ELF.h
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@ -620,6 +620,7 @@ protected:
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
friend class DynRefImpl<target_endianness, is64Bits>;
virtual error_code getDynNext(DataRefImpl DynData, DynRef &Result) const;
@ -1160,6 +1161,16 @@ error_code ELFObjectFile<target_endianness, is64Bits>
return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
::getSymbolValue(DataRefImpl Symb,
uint64_t &Val) const {
validateSymbol(Symb);
const Elf_Sym *symb = getSymbol(Symb);
Val = symb->st_value;
return object_error::success;
}
template<support::endianness target_endianness, bool is64Bits>
error_code ELFObjectFile<target_endianness, is64Bits>
::getSectionNext(DataRefImpl Sec, SectionRef &Result) const {

1
include/llvm/Object/MachO.h
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@ -61,6 +61,7 @@ protected:
virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const;
virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;

8
include/llvm/Object/ObjectFile.h
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@ -234,6 +234,9 @@ public:
/// end_sections() if it is undefined or is an absolute symbol.
error_code getSection(section_iterator &Result) const;
/// @brief Get value of the symbol in the symbol table.
error_code getValue(uint64_t &Val) const;
DataRefImpl getRawDataRefImpl() const;
};
typedef content_iterator<SymbolRef> symbol_iterator;
@ -300,6 +303,7 @@ protected:
uint32_t &Res) const = 0;
virtual error_code getSymbolSection(DataRefImpl Symb,
section_iterator &Res) const = 0;
virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const = 0;
// Same as above for SectionRef.
friend class SectionRef;
@ -444,6 +448,10 @@ inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
return OwningObject->getSymbolType(SymbolPimpl, Result);
}
inline error_code SymbolRef::getValue(uint64_t &Val) const {
return OwningObject->getSymbolValue(SymbolPimpl, Val);
}
inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
return SymbolPimpl;
}

5
lib/Object/COFFObjectFile.cpp
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@ -288,6 +288,11 @@ error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
return object_error::success;
}
error_code COFFObjectFile::getSymbolValue(DataRefImpl Symb,
uint64_t &Val) const {
report_fatal_error("getSymbolValue unimplemented in COFFObjectFile");
}
error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
SectionRef &Result) const {
const coff_section *sec = toSec(Sec);

4
lib/Object/MachOObjectFile.cpp
View File

@ -363,6 +363,10 @@ error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
return object_error::success;
}
error_code MachOObjectFile::getSymbolValue(DataRefImpl Symb,
uint64_t &Val) const {
report_fatal_error("getSymbolValue unimplemented in MachOObjectFile");
}
symbol_iterator MachOObjectFile::begin_symbols() const {
// DRI.d.a = segment number; DRI.d.b = symbol index.