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sys.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

static inline int mystrlen(char *s) {
      int i = 0;
      while (s[i])
            i++;
      return i;
}

void pass(void) {
      char s[] = "passed.\n";
      write (1, s, sizeof (s) - 1);
      exit (0);
}

void _fail(char *reason) {
      char s[] = "failed: ";
      int len = mystrlen(reason);
      write (1, s, sizeof (s) - 1);
      write (1, reason, len);
      write (1, "\n", 1);
//    exit (1);
}

void *memset (void *s, int c, size_t n) {
      char *p = s;
      int i;
      for (i = 0; i < n; i++)
            p[i] = c;
      return p;
}

void exit (int status) {
      asm volatile ("moveq 1, $r9\n" /* NR_exit.  */
                  "break 13\n");
      while(1)
            ;
}

ssize_t write (int fd, const void *buf, size_t count) {
      int r;
      asm volatile ("moveq 4, $r9\n" /* NR_write.  */
                  "break 13\n" : : : "memory");
      asm volatile ("move.d $r10, %0\n" : "=r" (r));
      return r;
}

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