From: John David Anglin <danglin@gcc.gnu.org>
Date: Mon, 28 Feb 2022 15:47:38 +0000 (+0000)
Subject: nptl: Fix cleanups for stack grows up [BZ# 28899]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d9525b620eac4cbdf790baf4776e85cf08df7c5;p=thirdparty%2Fglibc.git

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 9c7ed7d7ca0..0a2ec9b8bb1 100644
--- a/nptl/unwind.c
+++ b/nptl/unwind.c
@@ -26,7 +26,7 @@
 #include <libc-diag.h>
 #include <jmpbuf-unwind.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