Subversion Repositories openrisc_2011-10-31

/*

 * Copyright (c) 2003  Red Hat, Inc. All rights reserved.

 *

 * This copyrighted material is made available to anyone wishing to use, modify,

 * copy, or redistribute it subject to the terms and conditions of the BSD

 * License.  This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY expressed or implied, including the implied

 * warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  A copy

 * of this license is available at http://www.opensource.org/licenses. Any

 * Red Hat trademarks that are incorporated in the source code or documentation

 * are not subject to the BSD License and may only be used or replicated with

 * the express permission of Red Hat, Inc.

 */

#include "syscall.h"

/* Return ABI: $1 is errno, $0 is return value. */

#define S(n) \

        .global n ; .weak n ; n: ; \

        .2byte 0x7800 | ((SYS_##n & 0xe) << 7) | ((SYS_##n & 1) << 4) ; bra sysret

        .text

#define SYS___mep_write SYS_write

#define SYS___mep_read SYS_read

#define SYS__Sid_config SYS_reconfig

S(open)

S(close)

S(__mep_read)

S(__mep_write)

S(lseek)

S(unlink)

S(getpid)

S(kill)

S(fstat)

/* ARGV support.  */

S(argvlen)

S(argv)

/* These are extras added for one reason or another.  */

S(chdir)

S(stat)

S(chmod)

S(utime)

S(time)

S(gettimeofday)

S(times)

S(link)

S(_Sid_config)

sysret:

        add3    $sp, $sp, -16

        sw      $0, 0($sp)

        sw      $1, 4($sp)

        ldc     $2, $lp

        sw      $2, 8($sp)

        bsr     __errno

        lw      $1, 4($sp)

        sw      $1, ($0)

        lw      $0, 0($sp)

        lw      $2, 8($sp)

        stc     $2, $lp

        add3    $sp, $sp, 16

        ret