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SubjectRe: [RFC Patch 1/9] Introducing generic hardware breakpoint handler interfaces
K.Prasad wrote:
[...]
> + * len and type values are defined in include/asm/hw_breakpoint.h.
> + * Available values vary according to the architecture. On i386 the
> + * possibilities are:
> + *
> + * HW_BREAKPOINT_LEN_1
> + * HW_BREAKPOINT_LEN_2
> + * HW_BREAKPOINT_LEN_4
> + * HW_BREAKPOINT_LEN_EXECUTE
> + * HW_BREAKPOINT_RW
> + * HW_BREAKPOINT_READ
> + * HW_BREAKPOINT_EXECUTE
> + *
> + * On other architectures HW_BREAKPOINT_LEN_8 may be available, and the
> + * 1-, 2-, and 4-byte lengths may be unavailable. There also may be
> + * HW_BREAKPOINT_WRITE. You can use #ifdef to check at compile time.
> + */

On MIPS we support breakpoint lengths that are powers of 2 between 8 and
4096. Do you really want symbolic values for these? The debuggers have
to do calculations with the length values, so translating between the
symbolic values and numeric values would be tedious at best.


David Daney


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