fix: allow ignore some symbols

asm2asm.py

@@ -1858,6 +1858,7 @@ def _alloc_instr(self, instr: Instruction):
     __instr_repl__ = {
         'movdqa'  : 'movdqu',
         'movaps'  : 'movups',
+        'movapd'  : 'movupd',
         'vmovdqa' : 'vmovdqu',
         'vmovaps' : 'vmovups',
         'vmovapd' : 'vmovupd',
@@ -2505,6 +2506,12 @@ def make_subr_filename(name: str) -> str:
     else:
         return '%s_subr_%s.go' % ('_'.join(base[:-1]), base[-1])
 
+
+IGNORED_STUBS = {
+    "_do_xprintf",
+    "_write_syscall"
+}
+
 def main(): 
     # check for arguments
     if len(sys.argv) < 3:
@@ -2588,6 +2595,13 @@ def main():
             print('import (\n\t`github.com/bytedance/sonic/loader`\n)', file = fp)
             print(file = fp)
             print('const (', file = fp)
+
+            # remove duplicated symbols
+            keys = list(asm.code.funcs.keys())
+            for name in keys:
+                if name in IGNORED_STUBS:
+                    asm.code.funcs.pop(name)
+
             for name in asm.code.funcs.keys():
                 addr = asm.code.get(name)
                 if addr is not None:
@@ -2626,7 +2640,7 @@ def main():
                 print('var _cfunc%s = []loader.CFunc{' % name, file = fp)
                 print('    {"%s_entry", 0,  _entry_%s, 0, nil},' % (name, name), file = fp)
                 print('    {"%s", _entry_%s, _size_%s, _stack_%s, _pcsp_%s},' % (name, name, name, name, name), file = fp)
-            print('}', file = fp)
+                print('}', file = fp)
 
         else:
             print(file = fp)