[RuntimeDyld][ORC] Add support for Thumb mode to RuntimeDyldMachOARM.

This patch adds support for thumb relocations to RuntimeDyldMachOARM, and adds
a target-specific flags field to JITSymbolFlags (so that on ARM we can record
whether each symbol is Thumb-mode code).

RuntimeDyldImpl::emitSection is modified to ensure that stubs memory is
correctly aligned based on the size returned by getStubAlignment().

llvm-svn: 310517

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
index 8769dcf7374..87059ef2b88 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/JITSymbol.cpp
@@ -39,3 +39,11 @@ llvm::JITSymbolFlags::fromObjectSymbol(const object::BasicSymbolRef &Symbol) {
     Flags |= JITSymbolFlags::Exported;
   return Flags;
 }
+
+ARMJITSymbolFlags llvm::ARMJITSymbolFlags::fromObjectSymbol(
+                                         const object::BasicSymbolRef &Symbol) {
+  ARMJITSymbolFlags Flags;
+  if (Symbol.getFlags() & object::BasicSymbolRef::SF_Thumb)
+    Flags |= ARMJITSymbolFlags::Thumb;
+  return Flags;
+}