68300

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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