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, -12
        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, 12
        ret