linux-kernel - [PATCH v4 01/16] x86/stackprotector/32: Remove stack protector test script

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Date: Fri, 22 Mar 2024 12:52:18 -0400
From: Brian Gerst <brgerst@...il.com>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	"H . Peter Anvin" <hpa@...or.com>,
	Uros Bizjak <ubizjak@...il.com>,
	David.Laight@...lab.com,
	Brian Gerst <brgerst@...il.com>
Subject: [PATCH v4 01/16] x86/stackprotector/32: Remove stack protector test script

Test for compiler support directly in Kconfig.

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/Kconfig                          | 2 +-
 scripts/gcc-x86_32-has-stack-protector.sh | 8 --------
 2 files changed, 1 insertion(+), 9 deletions(-)
 delete mode 100755 scripts/gcc-x86_32-has-stack-protector.sh

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 03483b23a009..f326903cbe67 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -412,7 +412,7 @@ config PGTABLE_LEVELS
 config CC_HAS_SANE_STACKPROTECTOR
 	bool
 	default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC) $(CLANG_FLAGS)) if 64BIT
-	default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC) $(CLANG_FLAGS))
+	default $(cc-option,-mstack-protector-guard-reg=fs -mstack-protector-guard-symbol=__stack_chk_guard)
 	help
 	  We have to make sure stack protector is unconditionally disabled if
 	  the compiler produces broken code or if it does not let us control
diff --git a/scripts/gcc-x86_32-has-stack-protector.sh b/scripts/gcc-x86_32-has-stack-protector.sh
deleted file mode 100755
index 825c75c5b715..000000000000
--- a/scripts/gcc-x86_32-has-stack-protector.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-# This requires GCC 8.1 or better.  Specifically, we require
-# -mstack-protector-guard-reg, added by
-# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81708
-
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -m32 -O0 -fstack-protector -mstack-protector-guard-reg=fs -mstack-protector-guard-symbol=__stack_chk_guard - -o - 2> /dev/null | grep -q "%fs"
-- 
2.44.0