initial import

sysdeps/mach/start.c

@@ -0,0 +1,89 @@
+/* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sysdep.h>
+
+#ifndef	__GNUC__
+  #error This file uses GNU C extensions; you must compile with GCC.
+#endif
+
+/* The first piece of initialized data.  */
+int __data_start = 0;
+
+volatile int errno;
+
+#ifndef	HAVE_GNU_LD
+#define	__environ	environ
+#endif
+char **__environ;
+
+extern void __mach_init (void);
+extern void __libc_init (int argc, char **argv, char **envp);
+extern int main (int argc, char **argv, char **envp);
+
+/* These are uninitialized common definitions so they will be zero
+   by default.  If the user links in C threads, that will provide initialized
+   definitions that override these.  */
+void *(*_cthread_init_routine) (void); /* Returns new SP to use.  */
+void (*_cthread_exit_routine) (int status);
+
+
+/* These are for communication from _start to start1,
+   where we cannot use the stack for anything.  */
+static int start_argc;
+static char **start_argv;
+
+/* _start calls this on the new stack.  */
+static volatile void
+start1 (void)
+{
+  __libc_init (start_argc, start_argv, __environ);
+
+  (_cthread_exit_routine != NULL ? *_cthread_exit_routine : exit)
+    (main (start_argc, start_argv, __environ));
+
+  /* Should never get here.  */
+  LOSE;
+}
+
+#ifndef START_ARGS
+#define START_ARGS void
+#ifdef START_MACHDEP
+START_MACHDEP
+#define _start _start0
+#endif
+
+void
+_start (START_ARGS)
+{
+  SNARF_ARGS (start_argc, start_argv, __environ);
+
+  __mach_init ();
+
+  if (_cthread_init_routine != NULL)
+    CALL_WITH_SP (start1, (*_cthread_init_routine) ());
+  else
+    start1 ();
+
+  /* Should never get here.  */
+  LOSE;
+}