1 /* $NetBSD: cerror.S,v 1.13 2003/08/07 16:42:17 agc Exp $ */
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
35 #include <machine/asm.h>
36 __FBSDID("$FreeBSD$");
39 #if defined(LIBC_SCCS) && !defined(lint)
40 ASMSTR("from: @(#)cerror.s 8.1 (Berkeley) 6/16/93")
41 ASMSTR("$NetBSD: cerror.S,v 1.13 2003/08/07 16:42:17 agc Exp $")
42 #endif /* LIBC_SCCS and not lint */
46 * The __error() function is thread aware. For non-threaded
47 * programs and the initial threaded in threaded programs,
48 * it returns a pointer to the global errno variable.
50 .globl _C_LABEL(__error)
51 .type _C_LABEL(__error),%function
54 .frame sp, CALLFRAME_SIZ, ra
55 PIC_PROLOGUE(__cerror, t9)
56 subu sp, sp, CALLFRAME_SIZ
57 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ)
58 sw ra, CALLFRAME_RA(sp)
59 sw v0, 12(sp) # save errno value
61 la t9, _C_LABEL(__error) # locate address of errno
65 lw ra, CALLFRAME_RA(sp)
66 sw t0, 0(v0) # update errno value
67 addiu sp, sp, CALLFRAME_SIZ