mips: terminate the FDE before the return trampoline in makecontext

In makecontext the FDE needs to be terminated before the return
trampoline otherwise backtrace called within a context created by
makecontext yields infinite backtrace.

This bug has been present for a long time, stdlib/tst-makecontext did
not fail until recent commit e535ce25. Tested on mips-linux-gnu and
mips64el-linux-gnuabi64 and mips-linux-gnu, no regression.

This fixes stdlib/tst-makecontext on MIPS.

Changelog:
	[BZ #19792]
	* sysdeps/unix/sysv/linux/mips/makecontext.S (__makecontext):
	Terminate FDE before return label.

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index a6be76213e..727516e13b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2016-03-09  Aurelien Jarno  <aurelien@aurel32.net>
+
+	[BZ #19792]
+	* sysdeps/unix/sysv/linux/mips/makecontext.S (__makecontext):
+	Terminate FDE before return label.
+
 2016-03-09  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #19790]