mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-21 02:10:05 +00:00
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
|
/* Special startup code for ARM a.out binaries.
|
||
|
|
Copyright (C) 1998 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., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
/* The first piece of initialized data. */
|
||
|
|
int __data_start = 0;
|
||
|
|
#ifdef HAVE_WEAK_SYMBOLS
|
||
|
|
weak_alias (__data_start, data_start)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef errno
|
||
|
|
volatile int __errno;
|
||
|
|
strong_alias (__errno, errno)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern void __libc_init __P ((int argc, char **argv, char **envp));
|
||
|
|
extern int main __P ((int argc, char **argv, char **envp));
|
||
|
|
|
||
|
|
/* N.B.: It is important that this be the first function.
|
||
|
|
This file is the first thing in the text section. */
|
||
|
|
|
||
|
|
/* If this was in C it might create its own stack frame and
|
||
|
|
screw up the arguments. */
|
||
|
|
#ifdef NO_UNDERSCORES
|
||
|
|
asm (".text; .globl _start; _start: B start1");
|
||
|
|
#else
|
||
|
|
asm (".text; .globl __start; __start: B _start1");
|
||
|
|
|
||
|
|
/* Make an alias called `start' (no leading underscore, so it can't
|
||
|
|
conflict with C symbols) for `_start'. This is the name vendor crt0.o's
|
||
|
|
tend to use, and thus the name most linkers expect. */
|
||
|
|
asm (".set start, __start");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Fool gcc into thinking that more args are passed. This makes it look
|
||
|
|
on the stack (correctly) for the real arguments. It causes somewhat
|
||
|
|
strange register usage in start1(), but we aren't too bothered about
|
||
|
|
that at the moment. */
|
||
|
|
#define DUMMIES a1, a2, a3, a4
|
||
|
|
|
||
|
|
#ifdef DUMMIES
|
||
|
|
#define ARG_DUMMIES DUMMIES,
|
||
|
|
#define DECL_DUMMIES int DUMMIES;
|
||
|
|
#else
|
||
|
|
#define ARG_DUMMIES
|
||
|
|
#define DECL_DUMMIES
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* ARGSUSED */
|
||
|
|
static void
|
||
|
|
start1 (ARG_DUMMIES argc, argv, envp)
|
||
|
|
DECL_DUMMIES
|
||
|
|
int argc;
|
||
|
|
char **argv;
|
||
|
|
char **envp;
|
||
|
|
{
|
||
|
|
/* Store a pointer to the environment. */
|
||
|
|
__environ = envp;
|
||
|
|
|
||
|
|
/* Do C library initializations. */
|
||
|
|
__libc_init (argc, argv, __environ);
|
||
|
|
|
||
|
|
/* Call the user program. */
|
||
|
|
exit (main (argc, argv, __environ));
|
||
|
|
}
|