[PATCH v4 02/16] x86/stackprotector/64: Remove stack protector test script

Brian Gerst
2024-03-22T16:52:49Z

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@gmail.com>
---
arch/x86/Kconfig | 5 ++---
scripts/gcc-x86_64-has-stack-protector.sh | 4 ----
2 files changed, 2 insertions(+), 7 deletions(-)
delete mode 100755 scripts/gcc-x86_64-has-stack-protector.sh

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f326903cbe67..88d72227e3cb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -411,12 +411,11 @@ 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
- the compiler produces broken code or if it does not let us control
- the segment on 32-bit kernels.
+ the compiler does not allow control of the segment and symbol.

menu "Processor type and features"

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"
--
2.44.0