Re: [RFC] Register sets

[Jim Blandy <jimb@redhat.com>]

Daniel Jacobowitz <drow@mvista.com> writes:
> struct regset
> {
>   void (*supply_regset)(struct regcache *, const void *, size_t, int);
>   void (*read_regset)(struct regcache *, void *, size_t, int);
> };

If you want to allow people to define regset formats via the CLI, it
seems to me you probably want some kind of closure argument in there,
like this:

    struct regset
    {
      /* Always pass this to the supply_regset and read_regset
         functions below as their first argument.  */
      void *closure;
      void (*supply_regset)(void *closure,
                            struct regcache *, const void *, size_t, int);
      void (*read_regset)(void *closure,
                          struct regcache *, void *, size_t, int);
    };

This gives you the hook you need to have a single function for all
CLI-defined regsets, interpreting the layout the user supplies to the
CLI command.