1/*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2023 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 *    copyright notice, this list of conditions and the following
15 *    disclaimer in the documentation and/or other materials provided
16 *    with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 *    contributors may be used to endorse or promote products derived
20 *    from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#include <picolibc.h>
37
38	.section .text.m68k_semihost
39	.global m68k_semihost
40	.type m68k_semihost, @function
41	.balign 4
42m68k_semihost:
43	.cfi_startproc
44	movel %sp@(4),%d0
45	movel %sp@(8),%d1
46	/*
47	 * Make sure the semihost sequence is aligned correctly by
48	 * padding with NOPs
49	 */
50	.balignw 4,0x4e71
51	nop
52#if defined(__mcoldfire__) || defined(__mc68000__)
53	.short 0x4ac8
54#else
55	.short 0x4848
56#endif
57	.long 0x4e7bf000
58	rts
59	.cfi_endproc
60	.size m68k_semihost, .- m68k_semihost
61
62#if defined(__linux__) && defined(__ELF__)
63	.section .note.GNU-stack,"",%progbits
64#endif
65
66