ExecutionEngine: add R_AARCH64_ABS{16,32}

Add support for the R_AARCH64_ABS{16,32} relocations in the execution
engine.  This is primarily used for DWARF debug information relocations
and needed by the LLVM JIT to support JITing for lldb.

Patch by Alex Langford!

llvm-svn: 313654

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index defe64e4445..a079d95a50f 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -354,6 +354,18 @@ void RuntimeDyldELF::resolveAArch64Relocation(const SectionEntry &Section,
   default:
     llvm_unreachable("Relocation type not implemented yet!");
     break;
+  case ELF::R_AARCH64_ABS16: {
+    uint64_t Result = Value + Addend;
+    assert(static_cast<int64_t>(Result) >= INT16_MIN && Result < UINT16_MAX);
+    write(isBE, TargetPtr, static_cast<uint16_t>(Result & 0xffffU));
+    break;
+  }
+  case ELF::R_AARCH64_ABS32: {
+    uint64_t Result = Value + Addend;
+    assert(static_cast<int64_t>(Result) >= INT32_MIN && Result < UINT32_MAX);
+    write(isBE, TargetPtr, static_cast<uint32_t>(Result & 0xffffffffU));
+    break;
+  }
   case ELF::R_AARCH64_ABS64:
     write(isBE, TargetPtr, Value + Addend);
     break;