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Object/COFF: Expose more data in the public API.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142315 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2011-10-17 23:53:56 +00:00
parent ab6bcf35ae
commit 0e752cb4b4
2 changed files with 47 additions and 20 deletions
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25
include/llvm/Object/COFF.h
View File

@ -73,6 +73,16 @@ struct coff_relocation {
support::ulittle16_t Type;
};
struct coff_aux_section_definition {
support::ulittle32_t Length;
support::ulittle16_t NumberOfRelocations;
support::ulittle16_t NumberOfLinenumbers;
support::ulittle32_t CheckSum;
support::ulittle16_t Number;
support::ulittle8_t Selection;
char Unused[3];
};
class COFFObjectFile : public ObjectFile {
private:
const coff_file_header *Header;
@ -81,11 +91,7 @@ private:
const char *StringTable;
uint32_t StringTableSize;
error_code getSection(int32_t index,
const coff_section *&Res) const;
error_code getString(uint32_t offset, StringRef &Res) const;
error_code getSymbol(uint32_t index,
const coff_symbol *&Res) const;
const coff_symbol *toSymb(DataRefImpl Symb) const;
const coff_section *toSec(DataRefImpl Sec) const;
@ -142,6 +148,17 @@ public:
virtual StringRef getFileFormatName() const;
virtual unsigned getArch() const;
error_code getHeader(const coff_file_header *&Res) const;
error_code getSection(int32_t index, const coff_section *&Res) const;
error_code getSymbol(uint32_t index, const coff_symbol *&Res) const;
template <typename T>
error_code getAuxSymbol(uint32_t index, const T *&Res) const {
const coff_symbol *s;
error_code ec = getSymbol(index, s);
Res = reinterpret_cast<const T*>(s);
return ec;
}
error_code getSymbolName(const coff_symbol *symbol, StringRef &Res) const;
static inline bool classof(const Binary *v) {
return v->getType() == isCOFF;

42
lib/Object/COFFObjectFile.cpp
View File

@ -98,21 +98,7 @@ error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
StringRef &Result) const {
const coff_symbol *symb = toSymb(Symb);
// Check for string table entry. First 4 bytes are 0.
if (symb->Name.Offset.Zeroes == 0) {
uint32_t Offset = symb->Name.Offset.Offset;
if (error_code ec = getString(Offset, Result))
return ec;
return object_error::success;
}
if (symb->Name.ShortName[7] == 0)
// Null terminated, let ::strlen figure out the length.
Result = StringRef(symb->Name.ShortName);
else
// Not null terminated, use all 8 bytes.
Result = StringRef(symb->Name.ShortName, 8);
return object_error::success;
return getSymbolName(symb, Result);
}
error_code COFFObjectFile::getSymbolOffset(DataRefImpl Symb,
@ -525,6 +511,11 @@ unsigned COFFObjectFile::getArch() const {
}
}
error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
Res = Header;
return object_error::success;
}
error_code COFFObjectFile::getSection(int32_t index,
const coff_section *&Result) const {
// Check for special index values.
@ -553,13 +544,32 @@ error_code COFFObjectFile::getString(uint32_t offset,
error_code COFFObjectFile::getSymbol(uint32_t index,
const coff_symbol *&Result) const {
if (index > 0 && index < Header->NumberOfSymbols)
if (index >= 0 && index < Header->NumberOfSymbols)
Result = SymbolTable + index;
else
return object_error::parse_failed;
return object_error::success;
}
error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol,
StringRef &Res) const {
// Check for string table entry. First 4 bytes are 0.
if (symbol->Name.Offset.Zeroes == 0) {
uint32_t Offset = symbol->Name.Offset.Offset;
if (error_code ec = getString(Offset, Res))
return ec;
return object_error::success;
}
if (symbol->Name.ShortName[7] == 0)
// Null terminated, let ::strlen figure out the length.
Res = StringRef(symbol->Name.ShortName);
else
// Not null terminated, use all 8 bytes.
Res = StringRef(symbol->Name.ShortName, 8);
return object_error::success;
}
const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
return reinterpret_cast<const coff_relocation*>(Rel.p);
}