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 #include "malloc.h"
  21
  22 #undef int
  23 #undef char
  24 #undef unsigned
  25
  26 /* The main function for a Go program.  This records the command line
  27    parameters, calls the real main function, and returns a zero status
  28    if the real main function returns.  */
  29
  30 extern char **environ;
  31
  32 /* A copy of _end that a shared library can reasonably refer to.  */
  33 uintptr __go_end;
  34
  35 extern byte _end[];
  36
  37 /* The main function.  */
  38
  39 int
  40 main (int argc, char **argv)
  41 {
  42   runtime_isarchive = false;
  43
  44   if (runtime_isstarted)
  45     return 0;
  46   runtime_isstarted = true;
  47
  48   if (runtime_iscgo)
  49     setIsCgo ();
  50
  51   __go_end = (uintptr)_end;
  52   runtime_cpuinit ();
  53   runtime_check ();
  54   runtime_args (argc, (byte **) argv);
  55   runtime_osinit ();
  56   runtime_schedinit ();
  57   __go_go (runtime_main, NULL);
  58   runtime_mstart (runtime_m ());
  59   abort ();
  60 }