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Hardware Errors and Exception Handling
/* The jump table EVTABLE holds 16-bit address offsets for each
event. With offsets, this code is position independent and the
table is small.
+--------------+
| addr_event1
+--------------+
| addr_event2
+--------------+
|
. . .
+--------------+
| addr_eventN
+--------------+
*/
Example Code for an Exception Routine
The following code provides an example framework for an interrupt rou-
tine jumped to from an exception handler such as that described above.
Listing 4-6. Interrupt Routine for Handling Exception
[--SP] = RETI ;
/* Put body of routine here.*/
RETI = [SP++] ;
RTI ;
/* Return from interrupt. */
4-70
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
| _EVTABLE
| _EVTABLE + 2
|
| _EVTABLE + 2N
/* Push return address on stack. */
/* To return, pop return address and jump. */
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