Thanks Cathy
--- cwade@... wrote:
>
> Roy,
> We had a similar problem in the past. Here is a
> snippet of code which will
> save all the pertinent information on the stack so
> that you can look at it
> with the debugger after an error occurs.
>
> Good luck,
> Cathy
>
>
************************************************************************
>
> C file
>
> tULONG bus_error_pc_return;
> tULONG bus_error_fault_address;
> tULONG bus_error_pc_current;
>
> ASM File
>
>
> XDEF _bus_error_pc_return
> XDEF _bus_error_fault_address
> XDEF _bus_error_pc_current
>
>
;********************************************************************
> ; BUS ERROR IRQ Gets BERR frame off stack See
> CPU32 manual 6-29
>
;********************************************************************
>
> BUS_ERROR_IRQ:
>
> LINK A6,#0 ;get SP into A6
> MOVE.L (+$06,A6), _bus_error_pc_return ;put
> SP+2 in A0 return PC
> MOVE.L (+$0C,A6), _bus_error_fault_address ;put
> SP+8 in A1 faulted
> address
> MOVE.L (+$14,A6), _bus_error_pc_current ;put
> SP+10 in A2 current PC
>
> JMP _bus_error_handler
> RTE
>
>
;********************************************************************
> ; ADDRESS ERROR IRQ Gets BERR frame off stack
> See CPU32 manual 6-29
>
;********************************************************************
>
> ADDRESS_ERROR_IRQ:
>
> LINK A6,#0 ;get SP into A6
> MOVE.L (+$06,A6), _bus_error_pc_return ;put
> SP+2 in A0 return PC
> MOVE.L (+$0C,A6), _bus_error_fault_address ;put
> SP+8 in A1 faulted
> address
> MOVE.L (+$14,A6), _bus_error_pc_current ;put
> SP+10 in A2 current PC
>
> JMP _address_error_handler
> RTE
>
>
>
>
>
>
>
> Roy
>
>
> <spectric@yahoo.c To:
> 68300@yahoogroups.com
>
> om> cc:
>
>
>
> Subject: [68300] stack frames
>
> 05/15/02 07:46 AM
>
>
> Please respond to
>
>
> 68300
>
>
>
>
>
>
>
>
>
>
>
>
> Hi all
>
> I am having problems trying to find the source of an
> address error that causes an exception.
>
> The SSP contains the address of the stack frame, the
> format code should tell me the stack frame size, 4,
> 6
> or BERR frame. From this I should beable to locate
> the address of the offending code that causes the
> error but am not having much success, can anyone
> provide more info or advice.
>
> thanks Roy
>
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