Max Filippov 9f24f3c106 xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK
Implement syscall_get_nr, syscall_rollback, syscall_get_error,
syscall_{get,set}_return_value and syscall_{get,set}_arguments.
Select HAVE_ARCH_TRACEHOOK as Xtensa now has all support for that.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2018-12-17 13:50:22 -08:00
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