From 8bd51a2ba3c3bb81a693fff17e983d02d914c14c Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 20 Oct 2021 10:35:53 -0700 Subject: gcc-plugins: Explicitly document purpose and deprecation schedule GCC plugins should only exist when some compiler feature needs to be proven but does not exist in either GCC nor Clang. For example, if a desired feature is already in Clang, it should be added to GCC upstream. Document this explicitly. Additionally, mark the plugins with matching upstream GCC features as removable past their respective GCC versions. Cc: Masahiro Yamada Cc: Michal Marek Cc: Nick Desaulniers Cc: Jonathan Corbet Cc: James Morris Cc: "Serge E. Hallyn" Cc: Nathan Chancellor Cc: linux-hardening@vger.kernel.org Cc: linux-kbuild@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-security-module@vger.kernel.org Cc: llvm@lists.linux.dev Signed-off-by: Kees Cook Reviewed-by: Nathan Chancellor Reviewed-by: Miguel Ojeda Acked-by: Nick Desaulniers Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20211020173554.38122-2-keescook@chromium.org --- scripts/gcc-plugins/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts') diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig index ab9eb4cbe33a..7c7ba3b0d3cd 100644 --- a/scripts/gcc-plugins/Kconfig +++ b/scripts/gcc-plugins/Kconfig @@ -37,6 +37,8 @@ config GCC_PLUGIN_CYC_COMPLEXITY config GCC_PLUGIN_SANCOV bool + # Plugin can be removed once the kernel only supports GCC 6+ + depends on !CC_HAS_SANCOV_TRACE_PC help This plugin inserts a __sanitizer_cov_trace_pc() call at the start of basic blocks. It supports all gcc versions with plugin support (from @@ -83,8 +85,6 @@ config GCC_PLUGIN_RANDSTRUCT the existing seed and will be removed by a make mrproper or make distclean. - Note that the implementation requires gcc 4.7 or newer. - This plugin was ported from grsecurity/PaX. More information at: * https://grsecurity.net/ * https://pax.grsecurity.net/ -- cgit v1.2.3