arch_has_single_step — does this CPU support user-mode single-step?
arch_has_single_step ( | void); |
If this is defined, then there must be function declarations or
inlines for user_enable_single_step and user_disable_single_step.
arch_has_single_step should evaluate to nonzero iff the machine
supports instruction single-step for user mode.
It can be a constant or it can test a CPU feature bit.