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Adding support for absolute relocations. This occurs in ELF files when a relocation is given with no name and an undefined section. The relocation is applied with an address of zero. 

llvm-svn: 175643
This commit is contained in:
Andrew Kaylor 2013-02-20 18:09:21 +00:00
parent 7fb39669ef
commit 3d5d3101ed
1 changed files with 14 additions and 7 deletions
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21
llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
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@ -432,14 +432,21 @@ void RuntimeDyldImpl::resolveExternalSymbols() {
RelocationList &Relocs = i->second;
SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name);
if (Loc == GlobalSymbolTable.end()) {
// This is an external symbol, try to get it address from
// MemoryManager.
uint8_t *Addr = (uint8_t*) MemMgr->getPointerToNamedFunction(Name.data(),
if (Name.size() == 0) {
// This is an absolute symbol, use an address of zero.
DEBUG(dbgs() << "Resolving absolute relocations." << "\n");
resolveRelocationList(Relocs, 0);
}
else {
// This is an external symbol, try to get it address from
// MemoryManager.
uint8_t *Addr = (uint8_t*) MemMgr->getPointerToNamedFunction(Name.data(),
true);
DEBUG(dbgs() << "Resolving relocations Name: " << Name
<< "\t" << format("%p", Addr)
<< "\n");
resolveRelocationList(Relocs, (uintptr_t)Addr);
DEBUG(dbgs() << "Resolving relocations Name: " << Name
<< "\t" << format("%p", Addr)
<< "\n");
resolveRelocationList(Relocs, (uintptr_t)Addr);
}
} else {
report_fatal_error("Expected external symbol");
}