/*      $NetBSD: cerror.S,v 1.3 2015/03/27 23:23:14 matt Exp $  */

/*-
* Copyright (c) 1991, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include "SYS.h"

#if defined(LIBC_SCCS) && !defined(lint)
       RCSID("$NetBSD: cerror.S,v 1.3 2015/03/27 23:23:14 matt Exp $")
#endif /* LIBC_SCCS and not lint */

       .protected      _C_LABEL(__cerror)

       .globl  _C_LABEL(__errno)
ENTRY_NP(__cerror)
#ifdef _REENTRANT
       addi            sp, sp, -CALLFRAME_SIZ
       REG_S           ra, CALLFRAME_RA(sp)    # save return address
       INT_S           a0, CALLFRAME_S0(sp)    # save errno value

       call            PLT(_C_LABEL(__errno))  # locate address of errno

       INT_L           t0, CALLFRAME_S0(sp)    # retrieve errno value
       REG_L           ra, CALLFRAME_RA(sp)    # retrieve return address
       INT_S           t0, 0(a0)               # update errno value
       addi            sp, sp, CALLFRAME_SIZ
#else
       aiupc           a1, %hi(_C_LABEL(errno))
       INT_S           a0, %lo(_C_LABEL(errno))(a1)
#endif /* _REENTRANT */
       li              a0, -1
       li              a1, -1
       ret
END(__cerror)

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