init.s

ARM汇编实现软中断

       AREA init_SWI,CODE,READONLY
       EXPORT   init
init
       SUB         r2,r0,r1
       SUB         r2,r2,#0x8
       MOV         r2,r2,LSR #2
       ORR         R2,R2,#0XEA000000
       STR         R2,[R1]           ;将跳转指令写入地址0X08
       MOV         PC,LR
       END