ex3_70.s

汇编语言程序设计-基于ARM体系结构

 AREA Example_70,CODE,READONLY
      ENTRY
      CODE32
START
      LDR   r0,=ThumbCode+1
      MOV   lr,pc 	            
      BX    r0	                
      MOV   R2,#0                
      B START                           

      CODE16	                    
ThumbCode    LDR    r2,=0x003fffff
             MOV    lr,r2
             MOV    r0,#0x12
             SWI    0x45
             BX     lr	                
              
             END