linux-kernel - [PATCH v2 02/11] x86/stackprotector/64: Remove stack protector test script

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Message-ID: <20231026160100.195099-3-brgerst@gmail.com>
Date:   Thu, 26 Oct 2023 12:00:51 -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>,
        Peter Zijlstra <peterz@...radead.org>,
        Uros Bizjak <ubizjak@...il.com>,
        Brian Gerst <brgerst@...il.com>
Subject: [PATCH v2 02/11] x86/stackprotector/64: Remove stack protector test script

This test for the stack protector was added in 2006 to make sure the
compiler had the PR28281 patch applied.  With GCC 5.1 being the minimum
supported compiler now, it is no longer necessary.

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/Kconfig                          | 2 +-
 scripts/gcc-x86_64-has-stack-protector.sh | 4 ----
 2 files changed, 1 insertion(+), 5 deletions(-)
 delete mode 100755 scripts/gcc-x86_64-has-stack-protector.sh

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 039872be1630..92144c6f26d2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -410,7 +410,7 @@ 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 y if 64BIT
 	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
diff --git a/scripts/gcc-x86_64-has-stack-protector.sh b/scripts/gcc-x86_64-has-stack-protector.sh
deleted file mode 100755
index 75e4e22b986a..000000000000
--- a/scripts/gcc-x86_64-has-stack-protector.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -m64 -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
-- 
2.41.0