Add EH support to the MCJIT.

This gets exception handling working on ELF and Macho (x86-64 at least).
Other than the EH frame registration, this patch also implements support
for GOT relocations which are used to locate the personality function on
MachO.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181167 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 7 deletions

diff --git a/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/lib/ExecutionEngine/MCJIT/MCJIT.cpp
index ccaa72a610..38aa5474a3 100644
--- a/lib/ExecutionEngine/MCJIT/MCJIT.cpp
+++ b/lib/ExecutionEngine/MCJIT/MCJIT.cpp
@@ -168,15 +168,14 @@ void MCJIT::finalizeObject() {
     // If the call to Dyld.resolveRelocations() is removed from loadObject()
     // we'll need to do that here.
     loadObject(M);
-
-    // Set page permissions.
-    MemMgr->applyPermissions();
-
-    return;
+  } else {
+    // Resolve any relocations.
+    Dyld.resolveRelocations();
   }
 
-  // Resolve any relocations.
-  Dyld.resolveRelocations();
+  StringRef EHData = Dyld.getEHFrameSection();
+  if (!EHData.empty())
+    MemMgr->registerEHFrames(EHData);
 
   // Set page permissions.
   MemMgr->applyPermissions();