libgo/runtime/go-main.c

   1 /* go-main.c -- the main function for a Go program.
   2
   3    Copyright 2009 The Go Authors. All rights reserved.
   4    Use of this source code is governed by a BSD-style
   5    license that can be found in the LICENSE file.  */
   6
   7 #include "config.h"
   8
   9 #include <stdlib.h>
  10 #include <time.h>
  11 #include <unistd.h>
  12
  13 #ifdef HAVE_FPU_CONTROL_H
  14 #include <fpu_control.h>
  15 #endif
  16
  17 #include "runtime.h"
  18 #include "array.h"
  19 #include "arch.h"
  20
  21 #undef int
  22 #undef char
  23 #undef unsigned
  24
  25 /* The main function for a Go program.  This records the command line
  26    parameters, calls the real main function, and returns a zero status
  27    if the real main function returns.  */
  28
  29 extern char **environ;
  30
  31 /* A copy of _end that a shared library can reasonably refer to.  */
  32 uintptr __go_end;
  33
  34 extern byte _end[];
  35
  36 /* The main function.  */
  37
  38 int
  39 main (int argc, char **argv)
  40 {
  41   runtime_isarchive = false;
  42
  43   if (runtime_isstarted)
  44     return 0;
  45   runtime_isstarted = true;
  46
  47   if (runtime_iscgo)
  48     setIsCgo ();
  49
  50   __go_end = (uintptr)_end;
  51   runtime_cpuinit ();
  52   runtime_check ();
  53   runtime_args (argc, (byte **) argv);
  54   setncpu (getproccount ());
  55   setpagesize (getpagesize ());
  56   runtime_sched = runtime_getsched();
  57   runtime_schedinit ();
  58   __go_go (runtime_main, NULL);
  59   runtime_mstart (runtime_m ());
  60   abort ();
  61 }