A checkpointed task image may specify a value for the DABR (Data
Access Breakpoint Register). The restart code needs to validate this
value before making any changes to the current task.
ptrace_set_debugreg encapsulates the bounds checking and platform
dependencies of programming the DABR. Split
> +/* for reprogramming DABR/DAC during restart of a checkpointed task */
> +extern bool debugreg_valid(unsigned long val);
> +extern void debugreg_update(struct task_struct *task, unsigned long val);
> +
Please keep the "index" here. We may want to add support for IABR, and
there is some WIP to
