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From: Brian Gerst <brgerst@gmail.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>, "H . Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Uros Bizjak <ubizjak@gmail.com>,
	David.Laight@aculab.com, Brian Gerst <brgerst@gmail.com>
Subject: [PATCH v3 01/14] x86/stackprotector/32: Remove stack protector test script
Date: Wed, 15 Nov 2023 12:36:55 -0500	[thread overview]
Message-ID: <20231115173708.108316-2-brgerst@gmail.com> (raw)
In-Reply-To: <20231115173708.108316-1-brgerst@gmail.com>

Test for compiler support directly in Kconfig.

Signed-off-by: Brian Gerst <brgerst@gmail.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 882b11eccbb3..46c55fd7ca86 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -411,7 +411,7 @@ 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"
-- 
2.41.0


  reply	other threads:[~2023-11-15 17:37 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-15 17:36 [PATCH v3 00/14] x86-64: Stack protector and percpu improvements Brian Gerst
2023-11-15 17:36 ` Brian Gerst [this message]
2023-11-15 17:36 ` [PATCH v3 02/14] x86/stackprotector/64: Remove stack protector test script Brian Gerst
2023-11-15 17:36 ` [PATCH v3 03/14] x86/boot: Disable stack protector for early boot code Brian Gerst
2023-11-15 17:36 ` [PATCH v3 04/14] x86/pvh: Use fixed_percpu_data for early boot GSBASE Brian Gerst
2023-11-15 17:36 ` [PATCH v3 05/14] x86/relocs: Handle R_X86_64_REX_GOTPCRELX relocations Brian Gerst
2023-11-15 17:37 ` [PATCH v3 06/14] objtool: Allow adding relocations to an existing section Brian Gerst
2023-11-15 17:37 ` [PATCH v3 07/14] objtool: Convert fixed location stack protector accesses Brian Gerst
2023-11-15 17:37 ` [PATCH v3 08/14] x86/stackprotector/64: Convert to normal percpu variable Brian Gerst
2023-11-15 17:37 ` [PATCH v3 09/14] x86/percpu/64: Use relative percpu offsets Brian Gerst
2023-11-15 17:37 ` [PATCH v3 10/14] x86/percpu/64: Remove fixed_percpu_data Brian Gerst
2023-11-15 17:37 ` [PATCH v3 11/14] x86/boot/64: Remove inverse relocations Brian Gerst
2023-11-15 17:37 ` [PATCH v3 12/14] x86/percpu/64: Remove INIT_PER_CPU macros Brian Gerst
2023-11-15 17:37 ` [PATCH v3 13/14] percpu: Remove PER_CPU_FIRST_SECTION Brian Gerst
2023-11-15 17:37 ` [PATCH v3 14/14] kallsyms: Remove KALLSYMS_ABSOLUTE_PERCPU Brian Gerst

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