stdarg.c

   1 #include <stdarg.h>
   2
   3 #define ALIGN(x, a)     (((x) + (a) - 1) & ~((a) - 1))
   4
   5 void *__va_arg(void **ap, int size)
   6 {
   7         void *ret = *ap;
   8         *ap += ALIGN(size, 4);
   9         return ret;
  10 }