#include <stdint.h>
#include <system.h>

extern volatile uint8_t __bss_start[];
extern volatile uint8_t __bss_end[];

extern void app_main (void);

static size_t premain_memset (void* dst, uint8_t b, size_t n) {
  uint8_t* dst1 = dst;
  size_t i;
  for (i = 0; i < n; i++)
    dst1[i] = b;
  return i;
}

static void clear_bss (void) {
  premain_memset ((void*)__bss_start, 0, (uintptr_t)__bss_end - (uintptr_t)__bss_end);
}

void __premain (void) {
  clear_bss ();

  app_main ();

  quit ();
}