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cerror.S revision 1.7 
      1 /*	$NetBSD: cerror.S,v 1.7 2004/05/28 23:39:09 uwe Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	from: @(#)cerror.s	5.1 (Berkeley) 4/23/90
     35  */
     36 
     37 #include <machine/asm.h>
     38 #if defined(SYSLIBC_SCCS) && !defined(lint)
     39 	RCSID("$NetBSD: cerror.S,v 1.7 2004/05/28 23:39:09 uwe Exp $")
     40 #endif /* SYSLIBC_SCCS and not lint */
     41 
     42 #include "SYS.h"
     43 
     44 #ifdef _REENTRANT
     45 
     46 
     47 	.globl	_C_LABEL(__errno)
     48 
     49 	.align	2
     50 cerror:
     51 	mov.l	L__errno, r1
     52 	sts.l   pr, @-sp
     53 #ifdef PIC
     54 1:	bsrf	r1
     55 #else
     56 	jsr	@r1
     57 #endif
     58 	 mov.l	r0, @-sp	! save error code
     59 	mov.l	@sp+, r2	! restore error code
     60 	lds.l   @sp+, pr
     61 	mov.l	r2, @r0
     62 	mov	#-1, r1
     63 	rts
     64 	 mov	#-1, r0
     65 
     66 	.align	2
     67 L__errno:
     68 #ifdef PIC
     69 	.long	_C_LABEL(__errno) - (1b + 4)
     70 #else
     71 	.long	_C_LABEL(__errno)
     72 #endif
     73 
     74 #else /* !_REENTRANT */
     75 
     76 
     77 	.globl	_C_LABEL(errno)
     78 
     79 	.align	2
     80 cerror:
     81 #ifdef PIC
     82 	mov	r0, r2
     83 	mova	L_GOT, r0
     84 	mov.l	L_GOT, r1
     85 	add	r0, r1
     86 	mov.l	L_errno, r0
     87 	mov.l	@(r0, r1), r1
     88 	mov.l	r2, @r1
     89 #else
     90 	mov.l	L_errno, r1
     91 	mov.l	r0, @r1
     92 #endif
     93 	mov	#-1, r0
     94 	rts
     95 	 mov	#-1, r1
     96 
     97 	.align	2
     98 #ifdef PIC
     99 L_GOT:		.long	_GLOBAL_OFFSET_TABLE_
    100 L_errno:	.long	_C_LABEL(errno)@GOT
    101 #else
    102 L_errno:	.long	_C_LABEL(errno)
    103 #endif
    104 
    105 #endif /* !_REENTRANT */
    106