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authorKees Cook <keescook@chromium.org>2021-10-20 20:35:53 +0300
committerKees Cook <keescook@chromium.org>2021-10-21 18:41:38 +0300
commit8bd51a2ba3c3bb81a693fff17e983d02d914c14c (patch)
treee92bba2923437c4ee9590f821c470dedb4f2b2b2 /scripts/gcc-plugins/Kconfig
parent6eb4bd92c1cedcaadd65868b7ade396b422be4be (diff)
downloadlinux-8bd51a2ba3c3bb81a693fff17e983d02d914c14c.tar.xz
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 <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: James Morris <jmorris@namei.org> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Nathan Chancellor <nathan@kernel.org> 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 <keescook@chromium.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20211020173554.38122-2-keescook@chromium.org
Diffstat (limited to 'scripts/gcc-plugins/Kconfig')
-rw-r--r--scripts/gcc-plugins/Kconfig4
1 files changed, 2 insertions, 2 deletions
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/