exceptionhandler-ts201.asm

Visual DSP++ VDK的应用举例

/* =============================================================================
 *
 *   Description: This is the exception handler.
 *
 * -----------------------------------------------------------------------------
 *  Comments: 
 *
 * ===========================================================================*/

#include "VDK.h"

.section/charany/doubleany data1;
/* declare external globals */

/* declare locals */
.var	_temp_xR0; 

.section/charany/doubleany program;

/******************************************************************************
 * UserExceptionHandler
 */

/* User Exception Handler entry point */
.align_code 4;
.GLOBAL     UserExceptionHandler;
UserExceptionHandler:

	/**
	 * Handle the exception...
	 *
	 * Remember that the VDK reserves the user exception 0, which
	 * is accessed with the following instruction:
	 *
	 *	TRAP 0;;
	 *
	 * Any other exception (user or system), is your responsibility to handle
	 * here.
	 */


	/**
	 * Save off RETI (so as not to trample it), and return
	 */
	[J31 + _temp_xR0] = XR0; XR0 = RETI;;
	RETI = RETS;;
	RTI(NP)(ABS); RETI = XR0; XR0 = [j31 + _temp_xR0];;

.UserExceptionHandler.end:
/* =========================================================================== */