nptl: Fix cleanups for stack grows up [BZ# 28899]

_STACK_GROWS_DOWN is defined to 0 when the stack grows up.  The
code in unwind.c used `#ifdef _STACK_GROWS_DOWN' to selct the
stack grows down define for FRAME_LEFT.  As a result, the
_STACK_GROWS_DOWN define was always selected and cleanups were
incorrectly sequenced when the stack grows up.

(cherry picked from commit 2bbc694df279020a6620096d31c1e05c93966f9b)

diff --git a/nptl/unwind.c b/nptl/unwind.c
index c3563e3467caeb269a32ad17dc8aae6184a26b19..33b0d87579eede3e6f339de5bf86bf92f645f258 100644 (file)
--- a/nptl/unwind.c
+++ b/nptl/unwind.c
@@ -25,7 +25,7 @@
 #include <jmpbuf-unwind.h>
 #include <shlib-compat.h>
 
-#ifdef _STACK_GROWS_DOWN
+#if _STACK_GROWS_DOWN
 # define FRAME_LEFT(frame, other, adj) \
   ((uintptr_t) frame - adj >= (uintptr_t) other - adj)
 #elif _STACK_GROWS_UP