1/* $NetBSD: cerror.S,v 1.21 2022/12/03 14:04:39 skrll 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 1.21 2022/12/03 14:04:39 skrll Exp $") 42#endif 43#endif /* LIBC_SCCS and not lint */ 44 45#ifdef __PIC__ 46 .protected __cerror 47#endif 48 49#ifdef _REENTRANT 50 .globl _C_LABEL(__errno) 51NESTED_NOPROFILE(__cerror, CALLFRAME_SIZ, ra) 52 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 53 PIC_PROLOGUE(__cerror) # saves caller gp in t3 (n32/n64) 54 PTR_SUBU sp, CALLFRAME_SIZ 55 PTR_S ra, CALLFRAME_RA(sp) 56 INT_S v0, CALLFRAME_S0(sp) # save errno value 57#if defined(__mips_n32) || defined(__mips_n64) 58 PTR_S t3, CALLFRAME_GP(sp) # save caller gp (in t3) 59#endif 60 61 SAVE_GP(CALLFRAME_GP) 62 63 PTR_LA t9, _C_LABEL(__errno) # locate address of errno 64 65 jalr t9 # __errno() 66 67#if defined(__mips_n32) || defined(__mips_n64) 68 PTR_L gp, CALLFRAME_GP(sp) # restore caller gp 69#endif 70 INT_L t0, CALLFRAME_S0(sp) 71 PTR_L ra, CALLFRAME_RA(sp) 72 INT_S t0, 0(v0) # update errno value 73 PTR_ADDU sp, CALLFRAME_SIZ 74 li v0, -1 75 li v1, -1 76 77 # Note we don't use PIC_RETURN() here as the GP is stored 78 # on the stack and not in the t3 reg (for the n32/n64 case). 79 j ra 80END(__cerror) 81#else 82 .globl _C_LABEL(errno) 83LEAF_NOPROFILE(__cerror) 84 PIC_PROLOGUE(__cerror) 85 INT_S v0, _C_LABEL(errno) 86 li v0, -1 87 li v1, -1 88 PIC_RETURN() 89END(__cerror) 90#endif /* _REENTRANT */ 91