107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
|
/* Copyright (C) 1991, 1993, 1995 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 General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2, 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with the GNU C Library; see the file COPYING. If not, write to
|
||
|
|
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
|
|
||
|
|
#include <ansidecl.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sysdep.h> /* In case it wants to define anything. */
|
||
|
|
|
||
|
|
/* The first piece of initialized data. */
|
||
|
|
int __data_start = 0;
|
||
|
|
#ifdef HAVE_WEAK_SYMBOLS
|
||
|
|
weak_alias (__data_start, data_start)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef DUMMIES
|
||
|
|
#define ARG_DUMMIES DUMMIES,
|
||
|
|
#define DECL_DUMMIES int DUMMIES;
|
||
|
|
#else
|
||
|
|
#define ARG_DUMMIES
|
||
|
|
#define DECL_DUMMIES
|
||
|
|
#endif
|
||
|
|
|
||
|
|
VOLATILE int errno;
|
||
|
|
|
||
|
|
#ifdef HAVE_WEAK_SYMBOLS
|
||
|
|
weak_alias (__environ, environ)
|
||
|
|
#else
|
||
|
|
#undef environ
|
||
|
|
#define __environ environ
|
||
|
|
#endif
|
||
|
|
|
||
|
|
char **__environ;
|
||
|
|
|
||
|
|
extern void EXFUN(__libc_init, (int argc, char **argv, char **envp));
|
||
|
|
extern int EXFUN(main, (int argc, char **argv, char **envp));
|
||
|
|
|
||
|
|
|
||
|
|
/* Not a prototype because it gets called strangely. */
|
||
|
|
static void start1();
|
||
|
|
|
||
|
|
#ifndef HAVE__start
|
||
|
|
|
||
|
|
#if !defined (NO_UNDERSCORES) && defined (__GNUC__)
|
||
|
|
/* Declare _start with an explicit assembly symbol name of `start'
|
||
|
|
(note no leading underscore). This is the name vendor crt0.o's
|
||
|
|
tend to use, and thus the name most linkers expect. */
|
||
|
|
void _start (void) asm ("start");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* N.B.: It is important that this be the first function.
|
||
|
|
This file is the first thing in the text section. */
|
||
|
|
void
|
||
|
|
DEFUN_VOID(_start)
|
||
|
|
{
|
||
|
|
start1();
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined (NO_UNDERSCORES) && defined (HAVE_GNU_LD) && !defined (__GNUC__)
|
||
|
|
/* Make an alias called `start' (no leading underscore,
|
||
|
|
so it can't conflict with C symbols) for `_start'. */
|
||
|
|
asm(".stabs \"start\",11,0,0,0");
|
||
|
|
asm(".stabs \"__start\",1,0,0,0");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* ARGSUSED */
|
||
|
|
static void
|
||
|
|
start1(ARG_DUMMIES argc, argp)
|
||
|
|
DECL_DUMMIES
|
||
|
|
int argc;
|
||
|
|
char *argp;
|
||
|
|
{
|
||
|
|
char **argv = &argp;
|
||
|
|
|
||
|
|
/* The environment starts just after ARGV. */
|
||
|
|
__environ = &argv[argc + 1];
|
||
|
|
|
||
|
|
/* If the first thing after ARGV is the arguments
|
||
|
|
themselves, there is no environment. */
|
||
|
|
if ((char *) __environ == *argv)
|
||
|
|
/* The environment is empty. Make __environ
|
||
|
|
point at ARGV[ARGC], which is NULL. */
|
||
|
|
--__environ;
|
||
|
|
|
||
|
|
/* Do C library initializations. */
|
||
|
|
__libc_init (argc, argv, __environ);
|
||
|
|
|
||
|
|
/* Call the user program. */
|
||
|
|
exit(main(argc, argv, __environ));
|
||
|
|
}
|