Fri Jul 28 11:22:43 2023 UTC ()
vax/csu: __start: Use 0x0000 as entry mask instead of 0x0101 (two NOPs)

This was a quite common trick to able to load executables with a.out
headers stripped. Now, the system boots successfully into multi-user
mode without this trick.

Thanks ragge@ for kind explanation:
https://mail-index.netbsd.org/port-vax/2023/07/28/msg004397.html


(rin)
diff -r1.4 -r1.5 src/lib/csu/arch/vax/crt0.S
cvs diff -r1.4 -r1.5 src/lib/csu/arch/vax/crt0.S (expand / switch to unified diff)

--- src/lib/csu/arch/vax/crt0.S 2018/11/26 17:37:46 1.4
+++ src/lib/csu/arch/vax/crt0.S 2023/07/28 11:22:43 1.5
@@ -1,14 +1,14 @@ @@ -1,14 +1,14 @@
1/* $NetBSD: crt0.S,v 1.4 2018/11/26 17:37:46 joerg Exp $ */ 1/* $NetBSD: crt0.S,v 1.5 2023/07/28 11:22:43 rin Exp $ */
2 2
3/*- 3/*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * This code is derived from software contributed to The NetBSD Foundation 7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry. 8 * by Matt Thomas of 3am Software Foundry.
9 * 9 *
10 * Redistribution and use in source and binary forms, with or without 10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions 11 * modification, are permitted provided that the following conditions
12 * are met: 12 * are met:
13 * 1. Redistributions of source code must retain the above copyright 13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer. 14 * notice, this list of conditions and the following disclaimer.
@@ -21,22 +21,22 @@ @@ -21,22 +21,22 @@
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 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 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 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 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE. 29 * POSSIBILITY OF SUCH DAMAGE.
30 */ 30 */
31 31
32#include <vax/asm.h> 32#include <vax/asm.h>
33 33
34RCSID("$NetBSD: crt0.S,v 1.4 2018/11/26 17:37:46 joerg Exp $") 34RCSID("$NetBSD: crt0.S,v 1.5 2023/07/28 11:22:43 rin Exp $")
35 35
36STRONG_ALIAS(_start,__start) 36STRONG_ALIAS(_start,__start)
37 37
38_ENTRY(__start, 0x0101) 38_ENTRY(__start, 0x0000)
39 pushl %r9 /* ps_strings */ 39 pushl %r9 /* ps_strings */
40 pushl %r7 /* cleanup */ 40 pushl %r7 /* cleanup */
41 calls $2,___start 41 calls $2,___start
42END(__start) 42END(__start)