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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/vdso/Makefile | |
| parent | sched/core / kcov: avoid kcov_area during task switch (diff) | |
| download | linux-dev-758517202bd2e427664857c9f2aa59da36848aca.tar.xz linux-dev-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/vdso/Makefile')
| -rw-r--r-- | arch/arm/vdso/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile index bb4118213fee..f4efff9d3afb 100644 --- a/arch/arm/vdso/Makefile +++ b/arch/arm/vdso/Makefile @@ -30,6 +30,9 @@ CFLAGS_vgettimeofday.o = -O2 # Disable gcov profiling for VDSO code GCOV_PROFILE := n +# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. +KCOV_INSTRUMENT := n + # Force dependency $(obj)/vdso.o : $(obj)/vdso.so |