diff --git a/src/s2wasm.h b/src/s2wasm.h
index dd507143b67..ca6e5b7500d 100644
--- a/src/s2wasm.h
+++ b/src/s2wasm.h
@@ -153,9 +153,16 @@ class S2WasmBuilder {
 
   Name getStr() {
     std::string str; // TODO: optimize this and the other get* methods
-    while (*s && !isspace(*s)) {
-      str += *s;
-      s++;
+    if (*s == '\"') {
+      str += *s++;
+      while (*s && *s != '\"') {
+        str += *s++;
+      }
+      if (*s == '\"') str += *s++;
+    } else {
+      while (*s && !isspace(*s)) {
+        str += *s++;
+      }
     }
     return cashew::IString(str.c_str(), false);
   }
@@ -168,6 +175,11 @@ class S2WasmBuilder {
 
   Name getStrToSep() {
     std::string str;
+    if (*s == '\"') {
+      str += *s++;
+      while (*s && *s != '\"') str += *s++;
+      if (*s == '\"') str += *s++;
+    }
     while (*s && !isspace(*s) && *s != ',' && *s != '(' && *s != ')' && *s != ':' && *s != '+' && *s != '-' && *s != '=') {
       str += *s;
       s++;
@@ -177,10 +189,15 @@ class S2WasmBuilder {
 
   Name getStrToColon() {
     std::string str;
-    while (*s && !isspace(*s) && *s != ':') {
-      str += *s;
-      s++;
+    if (*s == '\"') {
+      str += *s++;
+      while (*s && *s != '\"') {
+        str += *s++;
+      }
+      if (*s == '\"') str += *s++;
     }
+    while (*s && !isspace(*s) && *s != ':')
+      str += *s++;
     return cashew::IString(str.c_str(), false);
   }
 
@@ -330,9 +347,18 @@ class S2WasmBuilder {
   Name getSeparated(char separator) {
     skipWhitespace();
     std::string str;
-    while (*s && *s != separator && *s != '\n') {
-      str += *s;
-      s++;
+    bool inQuoted = false;
+    int inBrackets = 0;
+    while (*s && (*s != separator || inQuoted || inBrackets > 0) && *s != '\n') {
+      if (*s == '\"') {
+        inQuoted = !inQuoted;
+      } else if (*s == '(') {
+        inBrackets++;
+      } else if (*s == ')') {
+        inBrackets--;
+      }
+
+      str += *s++;
     }
     skipWhitespace();
     return cashew::IString(str.c_str(), false);
@@ -421,14 +447,32 @@ class S2WasmBuilder {
   bool isFunctionName(Name name) {
     return !!strstr(name.str, "@FUNCTION");
   }
-  // Drop the @ and after it.
-  Name cleanFunction(Name name) {
-    if (!strchr(name.str, '@')) return name;
+
+  Name cleanName(Name name, char terminator = 0) {
     char *temp = strdup(name.str);
-    *strchr(temp, '@') = 0;
+    static const char* bads  = "\";<>() ";
+    static const char* goods = "\'$__$$$";
+    int index = 0;
+    while (bads[index] != 0) {
+        char *pos = temp;
+        while ((pos = strchr(pos, bads[index])) != nullptr) {
+          *pos = goods[index];
+          pos++;
+        }
+        index++;
+    }
+    if (terminator != 0) {
+      char* pos = strrchr(temp, terminator);
+      if (pos != nullptr) *pos = '\0';
+    }
     Name ret = cashew::IString(temp, false);
     free(temp);
     return ret;
+   }
+
+  // Drop the @ and after it.
+  Name cleanFunction(Name name) {
+    return cleanName(name, '@');
   }
 
   // processors
@@ -446,7 +490,7 @@ class S2WasmBuilder {
         if (match(".hidden")) mustMatch(name.str);
         mustMatch(name.str);
         if (match(":")) {
-          info->implementedFunctions.insert(name);
+          info->implementedFunctions.insert(cleanName(name));
         } else if (match("=")) {
           Name alias = getAtSeparated();
           mustMatch("@FUNCTION");
@@ -461,7 +505,7 @@ class S2WasmBuilder {
         s = strchr(s, '\n');
       } else {
         // add data aliases
-        Name lhs = getStrToSep();
+        Name lhs = cleanName(getStrToSep());
         // When the current line contains only one word, e.g.".text"
         if (match("\n"))
           continue;
@@ -473,7 +517,7 @@ class S2WasmBuilder {
         }
 
         // get the original name
-        Name rhs = getStrToSep();
+        Name rhs = cleanName(getStrToSep());
         assert(!isFunctionName(rhs));
         Offset offset = 0;
         if (*s == '+') {
@@ -611,7 +655,7 @@ class S2WasmBuilder {
   }
 
   void parseGlobl() {
-    linkerObj->addGlobal(getStr());
+    linkerObj->addGlobal(cleanName(getStr()));
     skipWhitespace();
   }
 
@@ -734,7 +778,7 @@ class S2WasmBuilder {
         skipWhitespace();
       } else break;
     }
-    Function* func = builder.makeFunction(name, std::move(params), resultType, std::move(vars));
+    Function* func = builder.makeFunction(cleanName(name), std::move(params), resultType, std::move(vars));
 
     // parse body
     func->body = allocator->alloc<Block>();
@@ -1324,6 +1368,11 @@ class S2WasmBuilder {
       mustMatch(name.str);
       skipWhitespace();
     }
+    if (match(".weak")) {
+      // Do nothing special on weak symbols so far.
+      mustMatch(name.str);
+      skipWhitespace();
+    }
     if (match(".align") || match(".p2align")) {
       align = getInt();
       skipWhitespace();
@@ -1417,9 +1466,10 @@ class S2WasmBuilder {
       r->data = (uint32_t*)&raw[i];
     }
     // assign the address, add to memory
-    linkerObj->addStatic(size, align, name);
+    Name wasmName = cleanName(name);
+    linkerObj->addStatic(size, align, wasmName);
     if (!zero) {
-      linkerObj->addSegment(name, raw);
+      linkerObj->addSegment(wasmName, raw);
     }
   }
 
@@ -1432,7 +1482,7 @@ class S2WasmBuilder {
       skipComma();
       localAlign = 1 << getInt();
     }
-    linkerObj->addStatic(size, std::max(align, localAlign), name);
+    linkerObj->addStatic(size, std::max(align, localAlign), cleanName(name));
   }
 
   void skipImports() {