libgloss/moxie/sim-time.c

   1 /* sim-time.c -- stubs so clock can be linked in.
   2  *
   3  * Copyright (c) 2008 Anthony Green
   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         jmpa _sim_time\n\
  29         ret\n\
  30 .Lsim:\n\
  31         .size   _sim_time,.Lsim-_sim_time");
  32
  33 extern time_t _sim_time (void) __asm__("_sim_time");
  34
  35
  36 /*
  37  * time -- return current time in seconds.
  38  */
  39 time_t
  40 time (time_t *t)
  41 {
  42   time_t ret = _sim_time ();
  43
  44   if (t)
  45     *t = ret;
  46
  47   return ret;
  48 }
  49
  50 /*
  51  * _times -- no clock, so return an error.
  52  */
  53 int
  54 _times (struct tms *buf)
  55 {
  56   errno = EINVAL;
  57   return (-1);
  58 }
  59
  60 /*
  61  * _gettimeofday -- implement in terms of time, which means we can't return the
  62  * microseconds.
  63  */
  64 int
  65 _gettimeofday (struct timeval *tv,
  66         void *tzvp)
  67 {
  68   struct timezone *tz = tzvp;
  69   if (tz)
  70     tz->tz_minuteswest = tz->tz_dsttime = 0;
  71
  72   tv->tv_usec = 0;
  73   tv->tv_sec = _sim_time ();
  74   return 0;
  75 }