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69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef __GNUC__
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#error This file uses GNU C extensions; you must compile with GCC.
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#endif
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/* The first piece of initialized data. */
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int __data_start = 0;
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VOLATILE int errno = 0;
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#ifndef HAVE_GNU_LD
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#undef environ
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#define __environ environ
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#endif
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char **__environ;
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extern void EXFUN(__libc_init, (int argc, char **argv, char **envp));
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extern int EXFUN(main, (int argc, char **argv, char **envp));
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/* Use the stack pointer to access the arguments. This assumes that
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we can guess how big the frame will be. */
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register long int sp asm("sp");
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#ifdef __OPTIMIZE__
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#define STACKSIZE 8
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#else
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#define STACKSIZE 10
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#endif
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void
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DEFUN_VOID(__start)
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{
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int argc;
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char **argv, **envp;
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/* Set up the global pointer. */
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asm volatile ("la $28,_gp");
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argc = ((int *) sp)[STACKSIZE];
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argv = (char **) &((int *) sp)[STACKSIZE + 1];
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envp = &argv[argc + 1];
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__environ = envp;
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__libc_init (argc, argv, envp);
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errno = 0;
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exit (main (argc, argv, envp));
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}
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