tests/hello-i386.c

   1 #include <asm/unistd.h>
   2
   3 static inline volatile 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
  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 }
  21
  22 void _start(void)
  23 {
  24     write(1, "Hello World\n", 12);
  25     exit(0);
  26 }