diff --git a/lld/test/wasm/relocatable.ll b/lld/test/wasm/relocatable.ll
--- a/lld/test/wasm/relocatable.ll
+++ b/lld/test/wasm/relocatable.ll
@@ -34,6 +34,9 @@
   ret i32 ptrtoint ([3 x i8]* @data_comdat to i32)
 }
 
+; Test that __attribute__(used) (i.e NO_STRIP) is preserved in the relocated symbol table
+@llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @my_func to i8*)], section "llvm.metadata"
+
 ; CHECK:      --- !WASM
 ; CHECK-NEXT: FileHeader:
 ; CHECK-NEXT:   Version:         0x00000001
@@ -188,7 +191,7 @@
 ; NORMAL-NEXT:      - Index:           3
 ; NORMAL-NEXT:        Kind:            FUNCTION
 ; NORMAL-NEXT:        Name:            my_func
-; NORMAL-NEXT:        Flags:           [ VISIBILITY_HIDDEN ]
+; NORMAL-NEXT:        Flags:           [ VISIBILITY_HIDDEN, NO_STRIP ]
 ; NORMAL-NEXT:        Function:        4
 ; NORMAL-NEXT:      - Index:           4
 ; NORMAL-NEXT:        Kind:            FUNCTION
diff --git a/lld/wasm/Driver.cpp b/lld/wasm/Driver.cpp
--- a/lld/wasm/Driver.cpp
+++ b/lld/wasm/Driver.cpp
@@ -441,10 +441,8 @@
 
 static UndefinedGlobal *
 createUndefinedGlobal(StringRef name, llvm::wasm::WasmGlobalType *type) {
-  auto *sym =
-      cast<UndefinedGlobal>(symtab->addUndefinedGlobal(name, name,
-                                                       defaultModule, 0,
-                                                       nullptr, type));
+  auto *sym = cast<UndefinedGlobal>(symtab->addUndefinedGlobal(
+      name, name, defaultModule, WASM_SYMBOL_UNDEFINED, nullptr, type));
   config->allowUndefinedSymbols.insert(sym->getName());
   sym->isUsedInRegularObj = true;
   return sym;
@@ -582,7 +580,8 @@
 };
 
 static Symbol *addUndefined(StringRef name) {
-  return symtab->addUndefinedFunction(name, "", "", 0, nullptr, nullptr, false);
+  return symtab->addUndefinedFunction(name, "", "", WASM_SYMBOL_UNDEFINED,
+                                      nullptr, nullptr, false);
 }
 
 // Handles -wrap option.
diff --git a/lld/wasm/InputFiles.cpp b/lld/wasm/InputFiles.cpp
--- a/lld/wasm/InputFiles.cpp
+++ b/lld/wasm/InputFiles.cpp
@@ -421,7 +421,7 @@
 
 Symbol *ObjFile::createUndefined(const WasmSymbol &sym, bool isCalledDirectly) {
   StringRef name = sym.Info.Name;
-  uint32_t flags = sym.Info.Flags;
+  uint32_t flags = sym.Info.Flags | WASM_SYMBOL_UNDEFINED;
 
   switch (sym.Info.Kind) {
   case WASM_SYMBOL_TYPE_FUNCTION:
@@ -509,6 +509,7 @@
   bool excludedByComdat = c != -1 && !keptComdats[c];
 
   if (objSym.isUndefined() || excludedByComdat) {
+    flags |= WASM_SYMBOL_UNDEFINED;
     if (objSym.isExecutable())
       return symtab->addUndefinedFunction(name, name, defaultModule, flags, &f,
                                           nullptr, true);
diff --git a/lld/wasm/SymbolTable.cpp b/lld/wasm/SymbolTable.cpp
--- a/lld/wasm/SymbolTable.cpp
+++ b/lld/wasm/SymbolTable.cpp
@@ -401,6 +401,7 @@
   LLVM_DEBUG(dbgs() << "addUndefinedFunction: " << name << " ["
                     << (sig ? toString(*sig) : "none")
                     << "] IsCalledDirectly:" << isCalledDirectly << "\n");
+  assert(flags & WASM_SYMBOL_UNDEFINED);
 
   Symbol *s;
   bool wasInserted;
@@ -443,6 +444,7 @@
 Symbol *SymbolTable::addUndefinedData(StringRef name, uint32_t flags,
                                       InputFile *file) {
   LLVM_DEBUG(dbgs() << "addUndefinedData: " << name << "\n");
+  assert(flags & WASM_SYMBOL_UNDEFINED);
 
   Symbol *s;
   bool wasInserted;
@@ -464,6 +466,7 @@
                                         InputFile *file,
                                         const WasmGlobalType *type) {
   LLVM_DEBUG(dbgs() << "addUndefinedGlobal: " << name << "\n");
+  assert(flags & WASM_SYMBOL_UNDEFINED);
 
   Symbol *s;
   bool wasInserted;
diff --git a/lld/wasm/SyntheticSections.cpp b/lld/wasm/SyntheticSections.cpp
--- a/lld/wasm/SyntheticSections.cpp
+++ b/lld/wasm/SyntheticSections.cpp
@@ -362,26 +362,6 @@
   return numSegments && config->sharedMemory;
 }
 
-static uint32_t getWasmFlags(const Symbol *sym) {
-  uint32_t flags = 0;
-  if (sym->isLocal())
-    flags |= WASM_SYMBOL_BINDING_LOCAL;
-  if (sym->isWeak())
-    flags |= WASM_SYMBOL_BINDING_WEAK;
-  if (sym->isHidden())
-    flags |= WASM_SYMBOL_VISIBILITY_HIDDEN;
-  if (sym->isUndefined())
-    flags |= WASM_SYMBOL_UNDEFINED;
-  if (auto *f = dyn_cast<UndefinedFunction>(sym)) {
-    if (f->getName() != f->importName)
-      flags |= WASM_SYMBOL_EXPLICIT_NAME;
-  } else if (auto *g = dyn_cast<UndefinedGlobal>(sym)) {
-    if (g->getName() != g->importName)
-      flags |= WASM_SYMBOL_EXPLICIT_NAME;
-  }
-  return flags;
-}
-
 void LinkingSection::writeBody() {
   raw_ostream &os = bodyOutputStream;
 
@@ -394,7 +374,7 @@
     for (const Symbol *sym : symtabEntries) {
       assert(sym->isDefined() || sym->isUndefined());
       WasmSymbolType kind = sym->getWasmType();
-      uint32_t flags = getWasmFlags(sym);
+      uint32_t flags = sym->getFlags();
 
       writeU8(sub.os, kind, "sym kind");
       writeUleb128(sub.os, flags, "sym flags");