libgloss/frv/sim-time.c

   1 /* sim-time.c -- stubs so clock can be linked in.
   2  *
   3  * Copyright (c) 2002 Red Hat, Inc
   4  *
   5  * The authors hereby grant permission to use, copy, modify, distribute,
   6  * and license this software and its documentation for any purpose, provided
   7  * that existing copyright notices are retained in all copies and that this
   8  * notice is included verbatim in any distributions. No written agreement,
   9  * license, or royalty fee is required for any of the authorized uses.
  10  * Modifications to this software may be copyrighted by their authors
  11  * and need not follow the licensing terms described here, provided that
  12  * the new terms are clearly indicated on the first page of each file where
  13  * they apply.
  14  */
  15 #include <errno.h>
  16 #include <sys/time.h>
  17 #include <sys/times.h>
  18 #include "glue.h"
  19
  20 /*
  21  * time -- simulator interface to return current time in seconds.
  22  */
  23 __asm__ ("\
  24         .text\n\
  25         .globl  _sim_time\n\
  26         .type   _sim_time,@function\n\
  27 _sim_time:\n\
  28         setlos  #18, gr7\n\
  29         tira    gr0, #0\n\
  30         ret\n\
  31 .Lsim:\n\
  32         .size   _sim_time,.Lsim-_sim_time");
  33
  34 extern time_t _sim_time (void) __asm__("_sim_time");
  35
  36
  37 /*
  38  * time -- return current time in seconds.
  39  */
  40 time_t
  41 _DEFUN (time, time (t),
  42         time_t *t)
  43 {
  44   time_t ret = _sim_time ();
  45
  46   if (t)
  47     *t = ret;
  48
  49   return ret;
  50 }
  51
  52 /*
  53  * _times -- no clock, so return an error.
  54  */
  55 int
  56 _DEFUN (_times, _times (buf),
  57         struct tms *buf)
  58 {
  59   errno = EINVAL;
  60   return (-1);
  61 }
  62
  63 /*
  64  * _gettimeofday -- implement in terms of time, which means we can't return the
  65  * microseconds.
  66  */
  67 int
  68 _DEFUN (_gettimeofday, _gettimeofday (tv, tz),
  69         struct timeval *tv _AND
  70         void *tzvp)
  71 {
  72   struct timezone *tz = tzvp;
  73   if (tz)
  74     tz->tz_minuteswest = tz->tz_dsttime = 0;
  75
  76   tv->tv_usec = 0;
  77   tv->tv_sec = _sim_time ();
  78   return 0;
  79 }