1/* $OpenBSD: cerror.S,v 1.13 2016/05/07 19:05:21 guenther 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 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include "DEFS.h" 37 38 .globl _C_LABEL(__errno) 39 40/* 41 * long long __cerror(register_t errcode) 42 * stores `errcode' into the current thread's errno variable, and returns 43 * -1LL. 44 */ 45 46ASENTRY(__cerror) 47 /* if %r26 has been initialized, don't bother setting up a frame */ 48 bcnd ne0, %r26, has_r26 49 50 subu %r31,%r31,16 51 st %r25,%r0,%r31 52 st %r1,%r31,4 53 54#ifdef __PIC__ 55 bsr.n _C_LABEL(__errno)#plt 56#else 57 bsr.n _C_LABEL(__errno) 58#endif 59 or %r25,%r0,%r2 60 or %r26,%r0,%r2 /* save errno ptr */ 61 or %r2,%r0,%r25 /* and restore errno value */ 62 63 ld %r1,%r31,4 64 ld %r25,%r0,%r31 65 addu %r31,%r31,16 66 67has_r26: 68 st %r2,%r0,%r26 69 subu %r2,%r0,1 70 jmp.n %r1 71 or %r3, %r0, %r2 72END(__cerror) 73