Another correction.

[glibc.git] / sysdeps / unix / sysv / linux / init-first.c

/* Initialization code run first thing by the ELF startup code.  Linux version.
Copyright (C) 1995, 1996 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 <unistd.h>
#include <sysdep.h>
#include <fpu_control.h>
#include "init-first.h"

extern void __libc_init (int, char **, char **);
extern void __libc_global_ctors (void);

/* The function is called from assembly stubs the compiler can't see.  */
static void init (void *) __attribute__ ((unused));

static void
init (void *data)
{
  extern int __personality (int);

  int argc = *(long *)data;
  char **argv = (char **)data + 1;
  char **envp = &argv[argc + 1];

  /* The `personality' system call takes one argument that chooses the
     "personality", i.e. the set of system calls and such.  Zero is the
     native Linux value; we must make this call first thing to disable
     emulation of some other system that might have been enabled by default
     based on the executable format.  */
  __personality (0);

  /* Set the FPU control word to the proper default value.  */
  __setfpucw (__fpu_control);

  __environ = envp;
  __libc_init (argc, argv, envp);

#ifdef PIC
  __libc_global_ctors ();
#endif
}

#ifdef PIC

SYSDEP_CALL_INIT(_init, init);

void
__libc_init_first (void)
{
}

#else

SYSDEP_CALL_INIT(__libc_init_first, init);

#endif