PR28955 mips gas segfault

[Alan Modra]

I'm going to commit this as obvious enough to not ask for target
maintainer approval.  Testing for NULL in pic_need_relax fixes the
other call to this function in md_estimate_size_before_relax.

	PR 28955
	* config/tc-mips.c (mips_frob_file): Move NULL sym test to..
	(pic_need_relax): ..here.

diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index 8a970ceada2..55a116ffd90 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -15449,8 +15449,7 @@ mips_frob_file (void)
 	 there isn't supposed to be a matching LO.  Ignore %gots against
 	 constants; we'll report an error for those later.  */
       if (got16_reloc_p (l->fixp->fx_r_type)
-	  && !(l->fixp->fx_addsy
-	       && pic_need_relax (l->fixp->fx_addsy)))
+	  && !pic_need_relax (l->fixp->fx_addsy))
 	continue;
 
       /* Check quickly whether the next fixup happens to be a matching %lo.  */
@@ -17705,6 +17704,9 @@ pic_need_relax (symbolS *sym)
 {
   asection *symsec;
 
+  if (!sym)
+    return false;
+
   /* Handle the case of a symbol equated to another symbol.  */
   while (symbol_equated_reloc_p (sym))
     {

-- 
Alan Modra
Australia Development Lab, IBM