#include <asm/unistd.h> static inline volatile void exit(int status) { int __res; __asm__ volatile ("movl %%ecx,%%ebx\n"\ "int $0x80" \ : "=a" (__res) : "0" (__NR_exit),"c" ((long)(status))); } static inline int write(int fd, const char * buf, int len) { int status; __asm__ volatile ("pushl %%ebx\n"\ "movl %%esi,%%ebx\n"\ "int $0x80\n" \ "popl %%ebx\n"\ : "=a" (status) \ : "0" (__NR_write),"S" ((long)(fd)),"c" ((long)(buf)),"d" ((long)(len))); } void _start(void) { write(1, "Hello World\n", 12); exit(0); }