diff options
| author | Mathieu Desnoyers <[email protected]> | 2019-04-29 11:28:01 -0400 |
|---|---|---|
| committer | Shuah Khan <[email protected]> | 2019-05-07 15:33:00 -0600 |
| commit | 496fd0fc9f5c4c187e69e8697387a7604ab7141d (patch) | |
| tree | c02c54efaa613849568fc55cee765f6e15ef6d66 | |
| parent | 7cd4ce2e466f56ae92930adbded675a4e326a59e (diff) | |
rseq/selftests: powerpc code signature: generate valid instructions
Use "twui" as the guard instruction for the restartable sequence abort
handler.
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Benjamin Herrenschmidt <[email protected]>
CC: Paul Mackerras <[email protected]>
CC: Michael Ellerman <[email protected]>
CC: Boqun Feng <[email protected]>
CC: Peter Zijlstra <[email protected]>
CC: "Paul E. McKenney" <[email protected]>
CC: Alan Modra <[email protected]>
CC: [email protected]
Signed-off-by: Shuah Khan <[email protected]>
| -rw-r--r-- | tools/testing/selftests/rseq/rseq-ppc.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h index 9df18487fa9f..76be90196fe4 100644 --- a/tools/testing/selftests/rseq/rseq-ppc.h +++ b/tools/testing/selftests/rseq/rseq-ppc.h @@ -6,7 +6,15 @@ * (C) Copyright 2016-2018 - Boqun Feng <[email protected]> */ -#define RSEQ_SIG 0x53053053 +/* + * RSEQ_SIG is used with the following trap instruction: + * + * powerpc-be: 0f e5 00 0b twui r5,11 + * powerpc64-le: 0b 00 e5 0f twui r5,11 + * powerpc64-be: 0f e5 00 0b twui r5,11 + */ + +#define RSEQ_SIG 0x0fe5000b #define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc") #define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc") |