1 #include <asm/unistd.h>
2
exit(int status)3 static inline void exit(int status)
4 {
5 int __res;
6 __asm__ volatile ("movl %%ecx,%%ebx\n"\
7 "int $0x80" \
8 : "=a" (__res) : "0" (__NR_exit),"c" ((long)(status)));
9 }
10
write(int fd,const char * buf,int len)11 static inline int write(int fd, const char * buf, int len)
12 {
13 int status;
14 __asm__ volatile ("pushl %%ebx\n"\
15 "movl %%esi,%%ebx\n"\
16 "int $0x80\n" \
17 "popl %%ebx\n"\
18 : "=a" (status) \
19 : "0" (__NR_write),"S" ((long)(fd)),"c" ((long)(buf)),"d" ((long)(len)));
20 return status;
21 }
22
23 void _start(void);
_start(void)24 void _start(void)
25 {
26 write(1, "Hello World\n", 12);
27 exit(0);
28 }
29