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| author |  Dmitry Vyukov <dvyukov@google.com>
| 2018-06-14 15:27:44 -0700 |
|---|---|---|
| committer |  Linus Torvalds <torvalds@linux-foundation.org>
| 2018-06-15 07:55:24 +0900 |
| commit | 758517202bd2e427664857c9f2aa59da36848aca (patch) | |
| tree | 550ace0c2101cf557526c0ac07c04dc2f938c7e1 /arch/arm/boot/compressed/Makefile | |
| parent | sched/core / kcov: avoid kcov_area during task switch (diff) | |
| download | linux-758517202bd2e427664857c9f2aa59da36848aca.tar.gz linux-758517202bd2e427664857c9f2aa59da36848aca.tar.bz2 linux-758517202bd2e427664857c9f2aa59da36848aca.zip | |
arm: port KCOV to arm
KCOV is code coverage collection facility used, in particular, by
syzkaller system call fuzzer. There is some interest in using syzkaller
on arm devices. So port KCOV to arm.
On implementation level this merely declares that KCOV is supported and
disables instrumentation of 3 special cases. Reasons for disabling are
commented in code.
Tested with qemu-system-arm/vexpress-a15.
Link: http://lkml.kernel.org/r/20180511143248.112484-1-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Abbott Liu <liuwenliang@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Koguchi Takuo <takuo.koguchi.sw@hitachi.com>
Cc: <syzkaller@googlegroups.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/boot/compressed/Makefile')
| -rw-r--r-- | arch/arm/boot/compressed/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index a3c5fbcad4ab..1f5a5ffe7fcf 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -25,6 +25,9 @@ endif GCOV_PROFILE := n +# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. +KCOV_INSTRUMENT := n + # # Architecture dependencies # |