[WebAssembly] Allow for signed relocation addends

Summary:
Addends are used as offsets to addresses of globals
and can be both positive and negative.  This change
prints libObject in line with the spec and the MC
layer.

Subscribers: jfb, dschuff

Differential Revision: https://reviews.llvm.org/D32507

llvm-svn: 301369

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp
index e1b3c4e1f39..4e1f237e17c 100644
--- a/llvm/lib/Object/WasmObjectFile.cpp
+++ b/llvm/lib/Object/WasmObjectFile.cpp
@@ -316,14 +316,15 @@ Error WasmObjectFile::parseRelocSection(StringRef Name, const uint8_t *Ptr,
     case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB:
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32:
+    case wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB:
       break;
     case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
     case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
     case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
-      Reloc.Addend = readVaruint32(Ptr);
+      Reloc.Addend = readVarint32(Ptr);
       break;
     default:
-      return make_error<GenericBinaryError>("Bad relocation type",
+      return make_error<GenericBinaryError>("Bad relocation type: " + Twine(Reloc.Type),
                                             object_error::parse_failed);
     }
     Section->Relocations.push_back(Reloc);