glibc/sysdeps/unix/sysv/linux/i386/mmap.S

/* Copyright (C) 1995, 1996, 1997, 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 <sysdep.h>

	.text

ENTRY (__mmap)

	/* Save registers.  */
	movl %ebx, %edx

	movl $SYS_ify(mmap), %eax	/* System call number in %eax.  */

	lea 4(%esp), %ebx		/* Address of args is 1st arg.  */

	/* Do the system call trap.  */
	int $0x80

	/* Restore registers.  */
	movl %edx, %ebx

	/* If 0 > %eax > -4096 there was an error.  */
	cmpl $-4096, %eax
	ja syscall_error

	/* Successful; return the syscall's value.  */
L(pseudo_end):
	ret

PSEUDO_END (__mmap)

weak_alias (__mmap, mmap)