1/* $NetBSD: startprog.S,v 1.3 1999/11/27 03:10:16 simonb Exp $ */ 2 3/*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jonathan Stone, Michael Hitch and Simon Burge. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * startprog(entry, stack, argc, argv, prom_magic, prom_ptr, bi_magic, bi_ptr); 41 * 42 * load new stack pointer, then call 43 * entry(argc, argv, prom_magic, prom_ptr, bi_magic, bi_ptr); 44 */ 45 46#include <mips/asm.h> 47 48LEAF(startprog) 49 subu sp,sp,32 50 addu t0,a1,-CALLFRAME_SIZ # new stack value 51 move t1,a0 52 move a0,a2 53 move a1,a3 54 55 lw a2,48(sp) # load everything from old stack we need 56 lw a3,52(sp) 57 lw v0,56(sp) 58 lw v1,60(sp) 59 60 move sp,t0 # new stack pointer 61 sw ra,24(sp) 62 63 sw v0,16(sp) 64 sw v1,20(sp) 65 jal ra,t1 66 nop # BDslot 67 68 lw ra,24(sp) # should not get back here! 69 j ra 70 addu sp,sp,32 71END(startprog) 72