commit a32d71be4c676b541c115bf1a960e56ea43d5231
author Lang Hames <lhames@gmail.com> Sun Oct 18 01:41:37 2015 +0000
committer Lang Hames <lhames@gmail.com> Sun Oct 18 01:41:37 2015 +0000
tree eb48c50a6e3c02ea3cf007048aa288d6ead6af8e
parent dab183ed40249328531acd424b5c512f86eca77d

[RuntimeDyld] Add support for absolute symbols.

llvm-svn: 250639

llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 518df12..c0a1617 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -188,6 +188,8 @@
   friend class RuntimeDyld::LoadedObjectInfo;
   friend class RuntimeDyldCheckerImpl;
 protected:
+  static const unsigned AbsoluteSymbolSection = ~0U;
+
   // The MemoryManager to load objects into.
   RuntimeDyld::MemoryManager &MemMgr;
 
@@ -407,6 +409,9 @@
     if (pos == GlobalSymbolTable.end())
       return nullptr;
     const auto &SymInfo = pos->second;
+    // Absolute symbols do not have a local address.
+    if (SymInfo.getSectionID() == AbsoluteSymbolSection)
+      return nullptr;
     return getSectionAddress(SymInfo.getSectionID()) + SymInfo.getOffset();
   }
 
@@ -417,8 +422,10 @@
     if (pos == GlobalSymbolTable.end())
       return nullptr;
     const auto &SymEntry = pos->second;
-    uint64_t TargetAddr =
-      getSectionLoadAddress(SymEntry.getSectionID()) + SymEntry.getOffset();
+    uint64_t SectionAddr = 0;
+    if (SymEntry.getSectionID() != AbsoluteSymbolSection)
+      SectionAddr = getSectionLoadAddress(SymEntry.getSectionID());
+    uint64_t TargetAddr = SectionAddr + SymEntry.getOffset();
     return RuntimeDyld::SymbolInfo(TargetAddr, SymEntry.getFlags());
   }