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authorAndrew Kaylor <andrew.kaylor@intel.com>2013-02-20 18:09:21 +0000
committerAndrew Kaylor <andrew.kaylor@intel.com>2013-02-20 18:09:21 +0000
commit7b170500dcfce130c1e5af1c9150014e69e56819 (patch)
tree491696ccf59f1e8cf1d97f572d4375510defb60e /lib/ExecutionEngine
parenteedff3547de6428798d0bd62c40fba3f93820922 (diff)
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175643 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/ExecutionEngine')
-rw-r--r--lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp21
1 files changed, 14 insertions, 7 deletions
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index c5b807b..64c9792 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -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");
}