Re: Exceptions

[Carsten Langgaard <carstenl@mips.com>]

Jeff Harrell wrote:

> I have been working through the initialization code for the MIPS/Linux
> kernel and have traced through to the point
> where the MIPS exceptions are installed.  I have not been able to locate
> the following routines
>
>         handle_adel
>         handle_ades
>         handle_sys
>         handle_bp
>         handle_n
>         handle_cpu
>         handle_ov
>         handle_tr
>         handle_fpe
>
> I see where these are defined by "extern asmlinkage" references but
> can't locate the actual implementation of these
> exceptions.  Any idea what files these routines might be located in?
> Any help would be greatly appreciated

They are located in arch/mips/kernel/entry.S
They are a little hard to find as they use the BUILD_HANDLER macro to
extract the routines.

>
>
> Thank you,
> Jeff Harrell
>
> ---------8< excerpt from kernel/traps.c -----
>
>  set_except_vector(1, handle_mod);
>  set_except_vector(2, handle_tlbl);
>  set_except_vector(3, handle_tlbs);
>  set_except_vector(4, handle_adel);
>  set_except_vector(5, handle_ades);
>  /*
>   * The Data Bus Error/ Instruction Bus Errors are signaled
>   * by external hardware.  Therefore these two expection have
>   * board specific handlers.
>   */
>  set_except_vector(6, handle_ibe);
>  set_except_vector(7, handle_dbe);
>  ibe_board_handler = default_be_board_handler;
>  dbe_board_handler = default_be_board_handler;
>
>  set_except_vector(8, handle_sys);
>  set_except_vector(9, handle_bp);
>  set_except_vector(10, handle_ri);
>  set_except_vector(11, handle_cpu);
>  set_except_vector(12, handle_ov);
>  set_except_vector(13, handle_tr);
>  set_except_vector(15, handle_fpe);
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Jeff Harrell                    Work:  (801) 619-6104
> Broadband Access group/TI
> jharrell@ti.com
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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