toolchain/gcc/newlib/libc/sys/z8ksim/crt0.c

   1 extern char _start_bss;
   2 extern char _end_bss;
   3 extern int main(int argc, char **argv, char **environ);
   4 void __main();
   5
   6 static void
   7 enter()
   8 {
   9 #if defined(__Z8002__)
  10   __main();
  11 #endif
  12   exit(main(0,0,0));
  13 }
  14 start()
  15 {
  16   char *p;
  17 #if defined(__Z8002__)
  18   asm("ld       r15,#__stack_top");
  19   asm("ld       r10,r15");
  20 #endif
  21 #if defined(__Z8001__)
  22   asm("ldl      rr14,#__stack_top");
  23   asm("ldl      rr10,rr14");
  24 #endif
  25
  26
  27   /* zero bss */
  28   p = &_start_bss;
  29   while (p < & _end_bss)
  30   {
  31     *p++ = 0;
  32   }
  33   enter();
  34 }
  35
  36 #if defined(__Z8002__)
  37 void __do_global_ctors ()
  38 {
  39   typedef void (*pfunc)();
  40   extern pfunc __ctors[];
  41   extern pfunc __ctors_end[];
  42   pfunc *p;
  43   for (p = __ctors_end; p > __ctors; )
  44     {
  45       (*--p)();
  46     }
  47 }
  48
  49 void __main()
  50 {
  51   static int initialized;
  52   if (! initialized)
  53     {
  54       initialized = 1;
  55       __do_global_ctors ();
  56     }
  57 }
  58 #endif