[WebAssembly] Fix imported function symbol names that differ from their import names in the .o format

Add a flag to allow symbols to have a wasm import name which differs from the
linker symbol name, allowing the linker to link code using the import_module
attribute.

This is the MC/Object portion of the patch.

Differential Revision: https://reviews.llvm.org/D57632

llvm-svn: 353474

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/tools/llvm-readobj/WasmDumper.cpp b/llvm/tools/llvm-readobj/WasmDumper.cpp
index 9ff222e9607..edcd0731553 100644
--- a/llvm/tools/llvm-readobj/WasmDumper.cpp
+++ b/llvm/tools/llvm-readobj/WasmDumper.cpp
@@ -224,8 +224,10 @@ void WasmDumper::printSymbol(const SymbolRef &Sym) {
   W.printEnum("Type", Symbol.Info.Kind, makeArrayRef(WasmSymbolTypes));
   W.printFlags("Flags", Symbol.Info.Flags, makeArrayRef(WasmSymbolFlags));
 
-  if (Symbol.Info.Flags & wasm::WASM_SYMBOL_UNDEFINED)
-    W.printString("Module", Symbol.Info.Module);
+  if (Symbol.Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) {
+    W.printString("ImportName", Symbol.Info.ImportName);
+    W.printString("ImportModule", Symbol.Info.ImportModule);
+  }
   if (Symbol.Info.Kind != wasm::WASM_SYMBOL_TYPE_DATA) {
     W.printHex("ElementIndex", Symbol.Info.ElementIndex);
   } else if (!(Symbol.Info.Flags & wasm::WASM_SYMBOL_UNDEFINED)) {