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Add support for relocations to ObjectFile.

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Patch by Danil Malyshev!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139314 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-09-08 20:52:17 +00:00
parent cbf479df8a
commit 0fcab076f0
5 changed files with 606 additions and 34 deletions
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75
lib/Object/COFFObjectFile.cpp
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@ -327,7 +327,7 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
return;
SectionTable =
reinterpret_cast<const coff_section *>( base()
+ HeaderStart
@ -360,7 +360,7 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
ec = object_error::parse_failed;
return;
}
ec = object_error::success;
}
@ -445,6 +445,77 @@ error_code COFFObjectFile::getString(uint32_t offset,
return object_error::success;
}
const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
assert(Rel.d.b < Header->NumberOfSections && "Section index out of range!");
const coff_section *Sect;
getSection(Rel.d.b, Sect);
assert(Rel.d.a < Sect->NumberOfRelocations && "Relocation index out of range!");
return
reinterpret_cast<const coff_relocation*>(base() +
Sect->PointerToRelocations) +
Rel.d.a;
}
error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
RelocationRef &Res) const {
const coff_section *Sect = NULL;
if (error_code ec = getSection(Rel.d.b, Sect))
return ec;
if (++Rel.d.a >= Sect->NumberOfRelocations) {
Rel.d.a = 0;
while (++Rel.d.b < Header->NumberOfSections) {
const coff_section *Sect;
getSection(Rel.d.b, Sect);
if (Sect->NumberOfRelocations > 0)
break;
}
}
Res = RelocationRef(Rel, this);
return object_error::success;
}
error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
uint64_t &Res) const {
const coff_section *Sect;
if (error_code ec = getSection(Rel.d.b, Sect))
return ec;
const coff_relocation* R = toRel(Rel);
Res = reinterpret_cast<uintptr_t>(base() +
Sect->PointerToRawData +
R->VirtualAddress);
return object_error::success;
}
error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
SymbolRef &Res) const {
const coff_relocation* R = toRel(Rel);
DataRefImpl Symb;
Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
Res = SymbolRef(Symb, this);
return object_error::success;
}
error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
uint32_t &Res) const {
const coff_relocation* R = toRel(Rel);
Res = R->Type;
return object_error::success;
}
error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
int64_t &Res) const {
Res = 0;
return object_error::success;
}
ObjectFile::relocation_iterator COFFObjectFile::begin_relocations() const {
DataRefImpl ret;
ret.d.a = 0;
ret.d.b = 1;
return relocation_iterator(RelocationRef(ret, this));
}
ObjectFile::relocation_iterator COFFObjectFile::end_relocations() const {
DataRefImpl ret;
ret.d.a = 0;
ret.d.b = Header->NumberOfSections;
return relocation_iterator(RelocationRef(ret, this));
}
namespace llvm {
ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {