Properly terminate FDE in makecontext for m68k (bug 18635)

git-mirror · Aug 5, 2015 · bb1d31d · bb1d31d
1 parent 72354ab
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,9 @@
+2015-08-05  Andreas Schwab  <schwab@linux-m68k.org>
+
+	[BZ #18635]
+	* sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S: Add nop
+	before return label.
+
 2015-08-05  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #18661]

diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S b/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S
@@ -74,8 +74,11 @@ ENTRY(__makecontext)
 	   have to install the context listed in the uc_link element of
 	   the context 'makecontext' manipulated at the time of the
 	   'makecontext' call.  If the pointer is NULL the process must
-	   terminate.  */
+	   terminate.
+	   Make sure to separate the return label from the previous unwind
+	   region, because the unwinder uses ra-1 to find the FDE.  */
 	cfi_endproc
+	nop
 1:
 	/* This removes the parameters passed to the function given to
 	   'makecontext' from the stack.  D7 contains the number of