1 /* $NetBSD: startprog.S,v 1.4 2008/04/28 20:23:31 martin Exp $ */
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jonathan Stone, Michael Hitch and Simon Burge.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
33 * startprog(entry, stack, argc, argv, prom_magic, prom_ptr, bi_magic, bi_ptr);
35 * load new stack pointer, then call
36 * entry(argc, argv, prom_magic, prom_ptr, bi_magic, bi_ptr);
42 subu sp,sp,CALLFRAME_SIZ
43 addu t2,a1,-CALLFRAME_SIZ # new stack value
49 lw a2,48(sp) # load everything from old stack we need
51 lw $8,56(sp) # use a4/t0 in case N32/N64 kernel
52 lw $9,60(sp) # use a5/t1 in case N32/N64 kernel
60 move sp,t2 # new stack pointer
61 sw ra,CALLFRAME_RA(sp)
63 sw $8,16(sp) # save on stack for O32
64 sw $9,20(sp) # save on stack for O32
68 lw ra,CALLFRAME_RA(sp) # should not get back here!
70 addu sp,sp,CALLFRAME_SIZ