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* [glibc/release/2.34/master] nptl: Fix cleanups for stack grows up [BZ# 28899]
@ 2022-03-06 16:01 John David Anglin
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From: John David Anglin @ 2022-03-06 16:01 UTC (permalink / raw)
  To: glibc-cvs

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=40fc6a74ee3dd600c84d311d91cbb16962f11a71

commit 40fc6a74ee3dd600c84d311d91cbb16962f11a71
Author: John David Anglin <danglin@gcc.gnu.org>
Date:   Mon Feb 28 15:47:38 2022 +0000

    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:
---
 nptl/unwind.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nptl/unwind.c b/nptl/unwind.c
index f50997f728..404fab46d0 100644
--- a/nptl/unwind.c
+++ b/nptl/unwind.c
@@ -27,7 +27,7 @@
 #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


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