xref: /qemu/tests/tcg/i386/hello-i386.c (revision 4a6648f44eefbfbea38a1de56f8a8e44a8892941)
14d1135e4Sbellard #include <asm/unistd.h>
24d1135e4Sbellard 
3*4a6648f4SBlue Swirl static inline volatile void exit(int status)
44d1135e4Sbellard {
54d1135e4Sbellard   int __res;
64d1135e4Sbellard   __asm__ volatile ("movl %%ecx,%%ebx\n"\
74d1135e4Sbellard 		    "int $0x80" \
84d1135e4Sbellard 		    :  "=a" (__res) : "0" (__NR_exit),"c" ((long)(status)));
94d1135e4Sbellard }
104d1135e4Sbellard 
11*4a6648f4SBlue Swirl static inline int write(int fd, const char * buf, int len)
124d1135e4Sbellard {
134d1135e4Sbellard   int status;
144d1135e4Sbellard   __asm__ volatile ("pushl %%ebx\n"\
154d1135e4Sbellard 		    "movl %%esi,%%ebx\n"\
164d1135e4Sbellard 		    "int $0x80\n" \
174d1135e4Sbellard 		    "popl %%ebx\n"\
184d1135e4Sbellard 		    : "=a" (status) \
194d1135e4Sbellard 		    : "0" (__NR_write),"S" ((long)(fd)),"c" ((long)(buf)),"d" ((long)(len)));
204d1135e4Sbellard }
214d1135e4Sbellard 
22bb326a37Sbellard void _start(void)
234d1135e4Sbellard {
244d1135e4Sbellard     write(1, "Hello World\n", 12);
254d1135e4Sbellard     exit(0);
264d1135e4Sbellard }
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