/* $NetBSD: cerror.S,v 1.21 2022/12/03 14:04:39 skrll 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) #if 0 RCSID("from: @(#)cerror.s 8.1 (Berkeley) 6/16/93") #else RCSID("$NetBSD: cerror.S,v 1.21 2022/12/03 14:04:39 skrll Exp $") #endif #endif /* LIBC_SCCS and not lint */ #ifdef __PIC__ .protected __cerror #endif #ifdef _REENTRANT .globl _C_LABEL(__errno) NESTED_NOPROFILE(__cerror, CALLFRAME_SIZ, ra) .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) PIC_PROLOGUE(__cerror) # saves caller gp in t3 (n32/n64) PTR_SUBU sp, CALLFRAME_SIZ PTR_S ra, CALLFRAME_RA(sp) INT_S v0, CALLFRAME_S0(sp) # save errno value #if defined(__mips_n32) || defined(__mips_n64) PTR_S t3, CALLFRAME_GP(sp) # save caller gp (in t3) #endif SAVE_GP(CALLFRAME_GP) PTR_LA t9, _C_LABEL(__errno) # locate address of errno jalr t9 # __errno() #if defined(__mips_n32) || defined(__mips_n64) PTR_L gp, CALLFRAME_GP(sp) # restore caller gp #endif INT_L t0, CALLFRAME_S0(sp) PTR_L ra, CALLFRAME_RA(sp) INT_S t0, 0(v0) # update errno value PTR_ADDU sp, CALLFRAME_SIZ li v0, -1 li v1, -1 # Note we don't use PIC_RETURN() here as the GP is stored # on the stack and not in the t3 reg (for the n32/n64 case). j ra END(__cerror) #else .globl _C_LABEL(errno) LEAF_NOPROFILE(__cerror) PIC_PROLOGUE(__cerror) INT_S v0, _C_LABEL(errno) li v0, -1 li v1, -1 PIC_RETURN() END(__cerror) #endif /* _REENTRANT */ |