tests/tcg/cris/bare/sys.c

   1 /*
   2  * Helper functions for CRIS system tests
   3  *
   4  * There is no libc and only a limited set of headers.
   5  */
   6
   7 #include <stddef.h>
   8
   9 void exit(int status)
  10 {
  11     register unsigned int callno asm ("r9") = 1; /* NR_exit */
  12
  13     asm volatile ("break 13\n"
  14                   : /* no outputs */
  15                   : "r" (callno)
  16                   : "memory");
  17     while (1) {
  18         /* do nothing */
  19     };
  20 }
  21
  22 size_t write(int fd, const void *buf, size_t count)
  23 {
  24     register unsigned int callno asm ("r9") = 4; /* NR_write */
  25     register unsigned int r10 asm ("r10") = fd;
  26     register const void *r11 asm ("r11") = buf;
  27     register size_t r12 asm ("r12") = count;
  28     register unsigned int r asm ("r10");
  29
  30     asm volatile ("break 13\n"
  31                   : "=r" (r)
  32                   : "r" (callno), "0" (r10), "r" (r11), "r" (r12)
  33                   : "memory");
  34
  35     return r;
  36 }
  37
  38 static inline int mystrlen(char *s)
  39 {
  40     int i = 0;
  41     while (s[i]) {
  42         i++;
  43     }
  44     return i;
  45 }
  46
  47
  48 void pass(void)
  49 {
  50     char s[] = "passed.\n";
  51     write(1, s, sizeof(s) - 1);
  52     exit(0);
  53 }
  54
  55 void _fail(char *reason)
  56 {
  57     char s[] = "\nfailed: ";
  58     int len = mystrlen(reason);
  59     write(1, s, sizeof(s) - 1);
  60     write(1, reason, len);
  61     write(1, "\n", 1);
  62     exit(1);
  63 }