diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-06-27 03:59:12 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-07-07 11:13:10 +0900 |
| commit | 893ab00439a45513cae55781fc8e3b7108ee1cda (patch) | |
| tree | fb8fd6db0c947cd8040bf06e520ecc6329e56cba /arch/Kconfig | |
| parent | dd7699e37f289fa433f42c6bcc108468c8b198c0 (diff) | |
kbuild: remove cc-option test of -fno-stack-protector
Some Makefiles already pass -fno-stack-protector unconditionally.
For example, arch/arm64/kernel/vdso/Makefile, arch/x86/xen/Makefile.
No problem report so far about hard-coding this option. So, we can
assume all supported compilers know -fno-stack-protector.
GCC 4.8 and Clang support this option (https://godbolt.org/z/_HDGzN)
Get rid of cc-option from -fno-stack-protector.
Remove CONFIG_CC_HAS_STACKPROTECTOR_NONE, which is always 'y'.
Note:
arch/mips/vdso/Makefile adds -fno-stack-protector twice, first
unconditionally, and second conditionally. I removed the second one.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 8cc35dc556c7..1ea61290900a 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -478,9 +478,6 @@ config HAVE_STACKPROTECTOR An arch should select this symbol if: - it has implemented a stack canary (e.g. __stack_chk_guard) -config CC_HAS_STACKPROTECTOR_NONE - def_bool $(cc-option,-fno-stack-protector) - config STACKPROTECTOR bool "Stack Protector buffer overflow detection" depends on HAVE_STACKPROTECTOR |