void RuntimeDyldImpl::resolveExternalSymbols() {
while (!ExternalSymbolRelocations.empty()) {
StringMap<RelocationList>::iterator i = ExternalSymbolRelocations.begin();
StringRef Name = i->first();
if (Name.size() == 0) {
// This is an absolute symbol, use an address of zero.
DEBUG(dbgs() << "Resolving absolute relocations."
<< "\n");
RelocationList &Relocs = i->second;
resolveRelocationList(Relocs, 0);
} else {
uint64_t Addr = 0;
SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name);
if (Loc == GlobalSymbolTable.end()) {
// This is an external symbol, try to get its address from
// MemoryManager.
Addr = MemMgr->getSymbolAddress(Name.data());
// The call to getSymbolAddress may have caused additional modules to
// be loaded, which may have added new entries to the
// ExternalSymbolRelocations map. Consquently, we need to update our
// iterator. This is also why retrieval of the relocation list
// associated with this symbol is deferred until below this point.
// New entries may have been added to the relocation list.
i = ExternalSymbolRelocations.find(Name);
} else {
// We found the symbol in our global table. It was probably in a
// Module that we loaded previously.
SymbolLoc SymLoc = Loc->second;
Addr = getSectionLoadAddress(SymLoc.first) + SymLoc.second;
}
// FIXME: Implement error handling that doesn't kill the host program!
if (!Addr)
report_fatal_error("Program used external function '" + Name +
"' which could not be resolved!");
updateGOTEntries(Name, Addr);
DEBUG(dbgs() << "Resolving relocations Name: " << Name << "\t"
<< format("0x%lx", Addr) << "\n");
// This list may have been updated when we called getSymbolAddress, so
// don't change this code to get the list earlier.
RelocationList &Relocs = i->second;
resolveRelocationList(Relocs, Addr);
}
ExternalSymbolRelocations.erase(i);
}
}
void RuntimeDyldImpl::resolveExternalSymbols() {
while(!ExternalSymbolRelocations.empty()) {
StringMap<RelocationList>::iterator i = ExternalSymbolRelocations.begin();
StringRef Name = i->first();
RelocationList &Relocs = i->second;
if (Name.size() == 0) {
// This is an absolute symbol, use an address of zero.
DEBUG(dbgs() << "Resolving absolute relocations." << "\n");
resolveRelocationList(Relocs, 0);
} else {
uint64_t Addr = 0;
SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name);
if (Loc == GlobalSymbolTable.end()) {
// This is an external symbol, try to get its address from
// MemoryManager.
Addr = MemMgr->getSymbolAddress(Name.data());
} else {
// We found the symbol in our global table. It was probably in a
// Module that we loaded previously.
SymbolLoc SymLoc = GlobalSymbolTable.lookup(Name);
Addr = getSectionLoadAddress(SymLoc.first) + SymLoc.second;
}
// FIXME: Implement error handling that doesn't kill the host program!
if (!Addr)
report_fatal_error("Program used external function '" + Name +
"' which could not be resolved!");
updateGOTEntries(Name, Addr);
DEBUG(dbgs() << "Resolving relocations Name: " << Name
<< "\t" << format("0x%lx", Addr)
<< "\n");
resolveRelocationList(Relocs, Addr);
}
ExternalSymbolRelocations.erase(i->first());
}
}
