linux-kernel - [PATCH 2/3] selftests/nolibc: allow disabling of stackprotector support

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Message-Id: <20230523-nolibc-stackprotector-gcc9-v1-2-3e4804235d50@weissschuh.net>
Date:   Wed, 24 May 2023 08:44:43 +0200
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhangjin Wu <falcon@...ylab.org>,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 2/3] selftests/nolibc: allow disabling of stackprotector
 support

This allows users to override the autodetected and enabled-by default
compiler support for stackprotectors.

It can be used with "make CFLAGS_STACKPROTECTOR= nolibc-test".

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 tools/testing/selftests/nolibc/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index 882ba6a33dbb..47c3c89092e4 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -77,10 +77,10 @@ Q=@
 endif
 
 CFLAGS_s390 = -m64
+CFLAGS_STACKPROTECTOR ?= $(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all))
 CFLAGS  ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \
 		$(call cc-option,-fno-stack-protector) \
-		$(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all)) \
-		$(CFLAGS_$(ARCH))
+		$(CFLAGS_$(ARCH)) $(CFLAGS_STACKPROTECTOR)
 LDFLAGS := -s
 
 help:

-- 
2.40.1