汇编和C相互调用，keil环境，arm体系

C代码：

#include<stdio.h>   extern void mystrcpy(char *s1,const char *s2);int main(void){const char *string1="test example";char *string2="xxxxxxxxxxxx";mystrcpy(string2,string1);while(1){;}}

汇编代码：

  EXPORT mystrcpyAREA strcpyasm,CODE,READONLYCODE32mystrcpyldr R15,=0x1str r2,[r0],#1cmp r2,#0bne mystrcpyBX LR    END