From: Sergei Trofimovich <slyfox@gentoo.org>
Date: Mon, 21 Dec 2020 04:54:34 +0000 (+0530)
Subject: m68k: fix clobbering a5 in setjmp() [BZ #24202]
X-Git-Tag: glibc-2.33~153
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6eb7e1da0e805e2893a0b70a5813641529d8c7e2;p=thirdparty%2Fglibc.git

m68k: fix clobbering a5 in setjmp() [BZ #24202]

setjmp() uses C code to store current registers into jmp_buf
environment. -fstack-protector-all places canary into setjmp()
prologue and clobbers 'a5' before it gets saved.

The change inhibits stack canary injection to avoid clobber.
---

diff --git a/sysdeps/m68k/setjmp.c b/sysdeps/m68k/setjmp.c
index 0b86f2d3eed..d8cc2515d28 100644
--- a/sysdeps/m68k/setjmp.c
+++ b/sysdeps/m68k/setjmp.c
@@ -19,6 +19,7 @@
 
 /* Save the current program position in ENV and return 0.  */
 int
+inhibit_stack_protector
 #if defined BSD_SETJMP
 # undef setjmp
 # define savemask 1