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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-05-28 11:22:00 +0200
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-06-08 11:56:00 +0200
commit2a61f4747eeaa85ce26ca9fbd81421b15facd018 (patch)
tree497f971a5b6af6085c8d2349e773045f6a88dcc1 /scripts/gcc-x86_64-has-stack-protector.sh
parentkbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE (diff)
downloadlinux-2a61f4747eeaa85ce26ca9fbd81421b15facd018.tar.xz
linux-2a61f4747eeaa85ce26ca9fbd81421b15facd018.zip
stack-protector: test compiler capability in Kconfig and drop AUTO mode
Move the test for -fstack-protector(-strong) option to Kconfig. If the compiler does not support the option, the corresponding menu is automatically hidden. If STRONG is not supported, it will fall back to REGULAR. If REGULAR is not supported, it will be disabled. This means, AUTO is implicitly handled by the dependency solver of Kconfig, hence removed. I also turned the 'choice' into only two boolean symbols. The use of 'choice' is not a good idea here, because all of all{yes,mod,no}config would choose the first visible value, while we want allnoconfig to disable as many features as possible. X86 has additional shell scripts in case the compiler supports those options, but generates broken code. I added CC_HAS_SANE_STACKPROTECTOR to test this. I had to add -m32 to gcc-x86_32-has-stack-protector.sh to make it work correctly. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'scripts/gcc-x86_64-has-stack-protector.sh')
-rwxr-xr-xscripts/gcc-x86_64-has-stack-protector.sh5
1 files changed, 0 insertions, 5 deletions
diff --git a/scripts/gcc-x86_64-has-stack-protector.sh b/scripts/gcc-x86_64-has-stack-protector.sh
index 4a48bdcd4d6b..3755af0cd9f7 100755
--- a/scripts/gcc-x86_64-has-stack-protector.sh
+++ b/scripts/gcc-x86_64-has-stack-protector.sh
@@ -2,8 +2,3 @@
# SPDX-License-Identifier: GPL-2.0
echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
-if [ "$?" -eq "0" ] ; then
- echo y
-else
- echo n
-fi