xref: /openbmc/qemu/tests/tcg/i386/hello-i386.c (revision 6d809e7d)
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