1*8269e767SBrooks Davis/*- 2*8269e767SBrooks Davis * Copyright (c) 2002 Peter Grehan. 3*8269e767SBrooks Davis * All rights reserved. 4*8269e767SBrooks Davis * 5*8269e767SBrooks Davis * Redistribution and use in source and binary forms, with or without 6*8269e767SBrooks Davis * modification, are permitted provided that the following conditions 7*8269e767SBrooks Davis * are met: 8*8269e767SBrooks Davis * 1. Redistributions of source code must retain the above copyright 9*8269e767SBrooks Davis * notice, this list of conditions and the following disclaimer. 10*8269e767SBrooks Davis * 2. Redistributions in binary form must reproduce the above copyright 11*8269e767SBrooks Davis * notice, this list of conditions and the following disclaimer in the 12*8269e767SBrooks Davis * documentation and/or other materials provided with the distribution. 13*8269e767SBrooks Davis * 14*8269e767SBrooks Davis * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*8269e767SBrooks Davis * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*8269e767SBrooks Davis * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*8269e767SBrooks Davis * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*8269e767SBrooks Davis * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*8269e767SBrooks Davis * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*8269e767SBrooks Davis * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*8269e767SBrooks Davis * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*8269e767SBrooks Davis * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*8269e767SBrooks Davis * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*8269e767SBrooks Davis * SUCH DAMAGE. 25*8269e767SBrooks Davis */ 26*8269e767SBrooks Davis/* $NetBSD: cerror.S,v 1.5 2000/01/27 14:58:48 kleink Exp $ */ 27*8269e767SBrooks Davis 28*8269e767SBrooks Davis#include <machine/asm.h> 29*8269e767SBrooks Davis#include "SYS.h" 30*8269e767SBrooks Davis 31*8269e767SBrooks Davis .globl HIDENAME(cerror) 32*8269e767SBrooks Davis .globl CNAME(__error) 33*8269e767SBrooks Davis 34*8269e767SBrooks Davis /* 35*8269e767SBrooks Davis * The __error() function is thread aware. For non-threaded 36*8269e767SBrooks Davis * programs and the initial thread in threaded programs, 37*8269e767SBrooks Davis * it returns a pointer to the global errno variable. 38*8269e767SBrooks Davis */ 39*8269e767SBrooks DavisHIDENAME(cerror): 40*8269e767SBrooks Davis mflr %r0 41*8269e767SBrooks Davis stwu %r1,-20(%r1) /* allocate new stack frame */ 42*8269e767SBrooks Davis stw %r0,24(%r1) /* and save lr, r31 */ 43*8269e767SBrooks Davis stw %r31,12(%r1) 44*8269e767SBrooks Davis#ifdef __PIC__ 45*8269e767SBrooks Davis stw %r30,8(%r1) 46*8269e767SBrooks Davis bcl 20,31,1f 47*8269e767SBrooks Davis1: 48*8269e767SBrooks Davis mflr %r30 49*8269e767SBrooks Davis addis %r30,%r30,_GLOBAL_OFFSET_TABLE_-1b@ha 50*8269e767SBrooks Davis addi %r30,%r30,_GLOBAL_OFFSET_TABLE_-1b@l 51*8269e767SBrooks Davis#endif 52*8269e767SBrooks Davis mr %r31,%r3 /* stash errval in callee-saved register */ 53*8269e767SBrooks Davis bl PIC_PLT(CNAME(__error)) 54*8269e767SBrooks Davis stw %r31,0(%r3) /* store errval into &errno */ 55*8269e767SBrooks Davis lwz %r0,24(%r1) 56*8269e767SBrooks Davis lwz %r31,12(%r1) 57*8269e767SBrooks Davis#ifdef __PIC__ 58*8269e767SBrooks Davis lwz %r30,8(%r1) 59*8269e767SBrooks Davis#endif 60*8269e767SBrooks Davis mtlr %r0 61*8269e767SBrooks Davis la %r1,20(%r1) 62*8269e767SBrooks Davis li %r3,-1 63*8269e767SBrooks Davis li %r4,-1 64*8269e767SBrooks Davis blr /* return to callers caller */ 65*8269e767SBrooks Davis 66*8269e767SBrooks Davis .section .note.GNU-stack,"",%progbits 67