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107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/* Copyright (C) 1991, 1993, 1995 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 modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU C Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, 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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#include <sysdep.h> /* In case it wants to define anything. */
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/* The first piece of initialized data. */
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int __data_start = 0;
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#ifdef HAVE_WEAK_SYMBOLS
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weak_alias (__data_start, data_start)
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#endif
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#ifdef DUMMIES
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#define ARG_DUMMIES DUMMIES,
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#define DECL_DUMMIES int DUMMIES;
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#else
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#define ARG_DUMMIES
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#define DECL_DUMMIES
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#endif
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VOLATILE int errno;
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#ifdef HAVE_WEAK_SYMBOLS
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weak_alias (__environ, environ)
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#else
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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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/* Not a prototype because it gets called strangely. */
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static void start1();
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#ifndef HAVE__start
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#if !defined (NO_UNDERSCORES) && defined (__GNUC__)
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/* Declare _start with an explicit assembly symbol name of `start'
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(note no leading underscore). This is the name vendor crt0.o's
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tend to use, and thus the name most linkers expect. */
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void _start (void) asm ("start");
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#endif
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/* N.B.: It is important that this be the first function.
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This file is the first thing in the text section. */
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void
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DEFUN_VOID(_start)
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{
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start1();
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}
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#if !defined (NO_UNDERSCORES) && defined (HAVE_GNU_LD) && !defined (__GNUC__)
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/* Make an alias called `start' (no leading underscore,
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so it can't conflict with C symbols) for `_start'. */
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asm(".stabs \"start\",11,0,0,0");
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asm(".stabs \"__start\",1,0,0,0");
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#endif
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#endif
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/* ARGSUSED */
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static void
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start1(ARG_DUMMIES argc, argp)
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DECL_DUMMIES
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int argc;
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char *argp;
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{
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char **argv = &argp;
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/* The environment starts just after ARGV. */
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__environ = &argv[argc + 1];
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/* If the first thing after ARGV is the arguments
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themselves, there is no environment. */
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if ((char *) __environ == *argv)
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/* The environment is empty. Make __environ
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point at ARGV[ARGC], which is NULL. */
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--__environ;
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/* Do C library initializations. */
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__libc_init (argc, argv, __environ);
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/* Call the user program. */
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exit(main(argc, argv, __environ));
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}
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