1209878Snwhitehorn/*- 2209878Snwhitehorn * Copyright (c) 2002 Peter Grehan. 3209878Snwhitehorn * All rights reserved. 4209878Snwhitehorn * 5209878Snwhitehorn * Redistribution and use in source and binary forms, with or without 6209878Snwhitehorn * modification, are permitted provided that the following conditions 7209878Snwhitehorn * are met: 8209878Snwhitehorn * 1. Redistributions of source code must retain the above copyright 9209878Snwhitehorn * notice, this list of conditions and the following disclaimer. 10209878Snwhitehorn * 2. Redistributions in binary form must reproduce the above copyright 11209878Snwhitehorn * notice, this list of conditions and the following disclaimer in the 12209878Snwhitehorn * documentation and/or other materials provided with the distribution. 13209878Snwhitehorn * 14209878Snwhitehorn * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15209878Snwhitehorn * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16209878Snwhitehorn * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17209878Snwhitehorn * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18209878Snwhitehorn * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19209878Snwhitehorn * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20209878Snwhitehorn * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21209878Snwhitehorn * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22209878Snwhitehorn * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23209878Snwhitehorn * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24209878Snwhitehorn * SUCH DAMAGE. 25209878Snwhitehorn */ 26209878Snwhitehorn/* $NetBSD: cerror.S,v 1.5 2000/01/27 14:58:48 kleink Exp $ */ 27209878Snwhitehorn 28209878Snwhitehorn#include <machine/asm.h> 29209878Snwhitehorn__FBSDID("$FreeBSD$"); 30209878Snwhitehorn 31209878Snwhitehorn#include "SYS.h" 32209878Snwhitehorn 33209878Snwhitehorn .globl HIDENAME(cerror) 34209878Snwhitehorn .globl CNAME(__error) 35209878Snwhitehorn 36209878Snwhitehorn /* 37209878Snwhitehorn * The __error() function is thread aware. For non-threaded 38209878Snwhitehorn * programs and the initial threaded in threaded programs, 39209878Snwhitehorn * it returns a pointer to the global errno variable. 40209878Snwhitehorn */ 41230400SandreastENTRY_NOPROF(HIDENAME(cerror)) 42209878Snwhitehorn mflr %r0 43209878Snwhitehorn std %r0,16(%r1) /* save lr */ 44216381Snwhitehorn stdu %r1,-64(%r1) /* allocate new stack frame */ 45209878Snwhitehorn std %r31,48(%r1) 46209878Snwhitehorn 47209878Snwhitehorn mr %r31,%r3 /* stash errval in callee-saved register */ 48218824Snwhitehorn bl CNAME(__error) 49209878Snwhitehorn nop 50209878Snwhitehorn stw %r31,0(%r3) /* store errval into &errno */ 51209878Snwhitehorn 52209878Snwhitehorn ld %r31,48(%r1) 53209878Snwhitehorn ld %r1,0(%r1) 54209878Snwhitehorn ld %r0,16(%r1) 55209878Snwhitehorn mtlr %r0 56209878Snwhitehorn li %r3,-1 57209878Snwhitehorn li %r4,-1 58209878Snwhitehorn blr 59209878Snwhitehorn 60217398Skib .section .note.GNU-stack,"",%progbits 61