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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2022-04-18 09:50:40 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-04-22 12:32:04 +0200 |
| commit | 22102f4559beaabcea614b29ee090c6a214f002f (patch) | |
| tree | 8e1daad16f0f8f0975dd61917d21df8c252b6966 /lib/Kconfig.debug | |
| parent | 4ab7674f5951ac6a8ac4fa8828090edb64a4771f (diff) | |
| download | lwn-22102f4559beaabcea614b29ee090c6a214f002f.tar.gz lwn-22102f4559beaabcea614b29ee090c6a214f002f.zip | |
objtool: Make noinstr hacks optional
Objtool has some hacks in place to workaround toolchain limitations
which otherwise would break no-instrumentation rules. Make the hacks
explicit (and optional for other arches) by turning it into a cmdline
option and kernel config option.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/b326eeb9c33231b9dfbb925f194ed7ee40edcd7c.1650300597.git.jpoimboe@redhat.com
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c0e4e47f3ce3..7d2bbc3e558e 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2036,11 +2036,11 @@ config KCOV bool "Code coverage for fuzzing" depends on ARCH_HAS_KCOV depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS - depends on !ARCH_WANTS_NO_INSTR || HAVE_OBJTOOL || \ + depends on !ARCH_WANTS_NO_INSTR || HAVE_NOINSTR_HACK || \ GCC_VERSION >= 120000 || CLANG_VERSION >= 130000 select DEBUG_FS select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC - select OBJTOOL if HAVE_OBJTOOL + select OBJTOOL if HAVE_NOINSTR_HACK help KCOV exposes kernel code coverage information in a form suitable for coverage-guided fuzzing (randomized testing). |