linux-kernel - [tip: x86/asm] x86/stackprotector: Remove stack protector test scripts

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Message-ID: <173988071350.10177.5052919294216712163.tip-bot2@tip-bot2>
Date: Tue, 18 Feb 2025 12:11:53 -0000
From: "tip-bot2 for Brian Gerst" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Brian Gerst <brgerst@...il.com>, Ingo Molnar <mingo@...nel.org>,
 Ard Biesheuvel <ardb@...nel.org>, Uros Bizjak <ubizjak@...il.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: x86/asm] x86/stackprotector: Remove stack protector test scripts

The following commit has been merged into the x86/asm branch of tip:

Commit-ID:     0ee2689b9374d6fd5f43b703713a532278654749
Gitweb:        https://git.kernel.org/tip/0ee2689b9374d6fd5f43b703713a532278654749
Author:        Brian Gerst <brgerst@...il.com>
AuthorDate:    Thu, 23 Jan 2025 14:07:34 -05:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 18 Feb 2025 10:14:47 +01:00

x86/stackprotector: Remove stack protector test scripts

With GCC 8.1 now the minimum supported compiler for x86, these scripts
are no longer needed.

Signed-off-by: Brian Gerst <brgerst@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Ard Biesheuvel <ardb@...nel.org>
Reviewed-by: Uros Bizjak <ubizjak@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/20250123190747.745588-3-brgerst@gmail.com
---
 arch/x86/Kconfig                          | 11 +----------
 scripts/gcc-x86_32-has-stack-protector.sh |  8 --------
 scripts/gcc-x86_64-has-stack-protector.sh |  4 ----
 3 files changed, 1 insertion(+), 22 deletions(-)
 delete mode 100755 scripts/gcc-x86_32-has-stack-protector.sh
 delete mode 100755 scripts/gcc-x86_64-has-stack-protector.sh

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index be2c311..6595b35 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -285,7 +285,7 @@ config X86
 	select HAVE_FUNCTION_ARG_ACCESS_API
 	select HAVE_SETUP_PER_CPU_AREA
 	select HAVE_SOFTIRQ_ON_OWN_STACK
-	select HAVE_STACKPROTECTOR		if CC_HAS_SANE_STACKPROTECTOR
+	select HAVE_STACKPROTECTOR
 	select HAVE_STACK_VALIDATION		if HAVE_OBJTOOL
 	select HAVE_STATIC_CALL
 	select HAVE_STATIC_CALL_INLINE		if HAVE_OBJTOOL
@@ -426,15 +426,6 @@ config PGTABLE_LEVELS
 	default 3 if X86_PAE
 	default 2
 
-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))
-	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
-	  the segment on 32-bit kernels.
-
 menu "Processor type and features"
 
 config SMP
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 9459ca4..0000000
--- 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 -m32 -O0 -fstack-protector -mstack-protector-guard-reg=fs -mstack-protector-guard-symbol=__stack_chk_guard - -o - 2> /dev/null | grep -q "%fs"
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 f680bb0..0000000
--- 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 -m64 -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"