1/* $NetBSD: cerror.S,v 1.15 2010/09/03 17:22:52 matt Exp $ */ 2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 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 35#include "SYS.h" 36 37#if defined(LIBC_SCCS) && !defined(lint) 38#if 0 39 RCSID("from: @(#)cerror.s 8.1 (Berkeley) 6/16/93") 40#else 41 RCSID("$NetBSD: cerror.S,v 1.15 2010/09/03 17:22:52 matt Exp $") 42#endif 43#endif /* LIBC_SCCS and not lint */ 44 45#ifdef _REENTRANT 46 .globl _C_LABEL(__errno) 47NESTED_NOPROFILE(__cerror, CALLFRAME_SIZ, ra) 48 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 49 PIC_PROLOGUE(__cerror) 50 PTR_SUBU sp, CALLFRAME_SIZ 51 PTR_S ra, CALLFRAME_RA(sp) 52 INT_S v0, CALLFRAME_S0(sp) # save errno value 53 54 SAVE_GP(CALLFRAME_GP) 55 56 PTR_LA t9, _C_LABEL(__errno) # locate address of errno 57 RESTORE_GP64 # restore GP (from t3) 58 jalr t9 # __errno() 59 60 INT_L t0, CALLFRAME_S0(sp) 61 PTR_L ra, CALLFRAME_RA(sp) 62 INT_S t0, 0(v0) # update errno value 63 PTR_ADDU sp, CALLFRAME_SIZ 64 li v0, -1 65 li v1, -1 66 j ra # GP has been restored. 67END(__cerror) 68#else 69 .globl _C_LABEL(errno) 70LEAF_NOPROFILE(__cerror) 71 PIC_PROLOGUE(__cerror) 72 INT_S v0, _C_LABEL(errno) 73 li v0, -1 74 li v1, -1 75 PIC_RETURN() 76END(__cerror) 77#endif /* _REENTRANT */ 78