1107571Sgrehan/*- 2107571Sgrehan * Copyright (c) 2002 Peter Grehan. 3107571Sgrehan * All rights reserved. 4107571Sgrehan * 5107571Sgrehan * Redistribution and use in source and binary forms, with or without 6107571Sgrehan * modification, are permitted provided that the following conditions 7107571Sgrehan * are met: 8107571Sgrehan * 1. Redistributions of source code must retain the above copyright 9107571Sgrehan * notice, this list of conditions and the following disclaimer. 10107571Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11107571Sgrehan * notice, this list of conditions and the following disclaimer in the 12107571Sgrehan * documentation and/or other materials provided with the distribution. 13107571Sgrehan * 14107571Sgrehan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15107571Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16107571Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17107571Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18107571Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19107571Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20107571Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21107571Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22107571Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23107571Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24107571Sgrehan * SUCH DAMAGE. 25107571Sgrehan */ 26107571Sgrehan/* $NetBSD: cerror.S,v 1.5 2000/01/27 14:58:48 kleink Exp $ */ 27107571Sgrehan 28107571Sgrehan#include <machine/asm.h> 29107571Sgrehan__FBSDID("$FreeBSD$"); 30107571Sgrehan 31107571Sgrehan#include "SYS.h" 32107571Sgrehan 33107571Sgrehan .globl HIDENAME(cerror) 34107571Sgrehan .globl CNAME(__error) 35107571Sgrehan 36107571Sgrehan /* 37107571Sgrehan * The __error() function is thread aware. For non-threaded 38107571Sgrehan * programs and the initial threaded in threaded programs, 39107571Sgrehan * it returns a pointer to the global errno variable. 40107571Sgrehan */ 41107571SgrehanHIDENAME(cerror): 42107571Sgrehan mflr %r0 43107571Sgrehan stwu %r1,-16(%r1) /* allocate new stack frame */ 44107571Sgrehan stw %r0,20(%r1) /* and save lr, r31 */ 45107571Sgrehan stw %r31,8(%r1) 46107571Sgrehan mr %r31,%r3 /* stash errval in callee-saved register */ 47107571Sgrehan bl PIC_PLT(CNAME(__error)) 48107571Sgrehan stw %r31,0(%r3) /* store errval into &errno */ 49107571Sgrehan lwz %r0,20(%r1) 50107571Sgrehan lwz %r31,8(%r1) 51107571Sgrehan mtlr %r0 52107571Sgrehan la %r1,16(%r1) 53107571Sgrehan li %r3,-1 54107571Sgrehan li %r4,-1 55107571Sgrehan blr /* return to callers caller */ 56107571Sgrehan 57217398Skib .section .note.GNU-stack,"",%progbits 58