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| author | Will Deacon <will.deacon@arm.com> | 2018-06-20 16:46:50 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-07-11 15:29:34 +0300 |
| commit | 409d5db49867c20d226a1fc50a73d646bd733dae (patch) | |
| tree | 5e74440b1abe186b348be600946e78ad1c44efc2 /arch/arm64/kernel/entry.S | |
| parent | 54501ac150fed82b256e6a9bd4e2201bc3b21b22 (diff) | |
| download | linux-409d5db49867c20d226a1fc50a73d646bd733dae.tar.xz | |
arm64: rseq: Implement backend rseq calls and select HAVE_RSEQ
Implement calls to rseq_signal_deliver, rseq_handle_notify_resume
and rseq_syscall so that we can select HAVE_RSEQ on arm64.
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 28ad8799406f..1eda9e1a1f4a 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -904,6 +904,7 @@ ENDPROC(el0_error) ret_fast_syscall: disable_daif str x0, [sp, #S_X0] // returned x0 +#ifndef CONFIG_DEBUG_RSEQ ldr x1, [tsk, #TSK_TI_FLAGS] // re-check for syscall tracing and x2, x1, #_TIF_SYSCALL_WORK cbnz x2, ret_fast_syscall_trace @@ -911,6 +912,7 @@ ret_fast_syscall: cbnz x2, work_pending enable_step_tsk x1, x2 kernel_exit 0 +#endif ret_fast_syscall_trace: enable_daif b __sys_trace_return_skipped // we already saved x0 |