1 /* $NetBSD: m68k_machdep.c,v 1.11 2023/09/26 12:46:30 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * Copyright (c) 1988 University of Utah.
31 * Copyright (c) 1982, 1986, 1990, 1993
32 * The Regents of the University of California. All rights reserved.
33 *
34 * This code is derived from software contributed to Berkeley by
35 * the Systems Programming Group of the University of Utah Computer
36 * Science Department.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 *
62 * from: Utah $Hdr: machdep.c 1.74 92/12/20$
63 *
64 * @(#)machdep.c 8.10 (Berkeley) 4/20/94
65 */
66
67 #include <sys/cdefs.h>
68 __KERNEL_RCSID(0, "$NetBSD: m68k_machdep.c,v 1.11 2023/09/26 12:46:30 tsutsui Exp $");
69
70 #include "opt_compat_sunos.h"
71
72 #include <sys/param.h>
73 #include <sys/exec.h>
74 #include <sys/lwp.h>
75 #include <sys/proc.h>
76
77 #include <m68k/m68k.h>
78 #include <m68k/frame.h>
79 #include <m68k/pcb.h>
80 #include <m68k/reg.h>
81
82 /* the following is used externally (sysctl_hw) */
83 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */
84
85 extern short exframesize[];
86
87 /*
88 * Set registers on exec.
89 */
90 void
setregs(struct lwp * l,struct exec_package * pack,vaddr_t stack)91 setregs(struct lwp *l, struct exec_package *pack, vaddr_t stack)
92 {
93 struct trapframe *tf = (struct trapframe *)l->l_md.md_regs;
94 struct pcb *pcb = lwp_getpcb(l);
95
96 tf->tf_sr = PSL_USERSET;
97 tf->tf_pc = pack->ep_entry & ~1;
98 tf->tf_regs[D0] = 0;
99 tf->tf_regs[D1] = 0;
100 tf->tf_regs[D2] = 0;
101 tf->tf_regs[D3] = 0;
102 tf->tf_regs[D4] = 0;
103 tf->tf_regs[D5] = 0;
104 tf->tf_regs[D6] = 0;
105 tf->tf_regs[D7] = 0;
106 tf->tf_regs[A0] = 0;
107 tf->tf_regs[A1] = 0;
108 tf->tf_regs[A2] = l->l_proc->p_psstrp;
109 tf->tf_regs[A3] = 0;
110 tf->tf_regs[A4] = 0;
111 tf->tf_regs[A5] = 0;
112 tf->tf_regs[A6] = 0;
113 tf->tf_regs[SP] = stack;
114
115 /* restore a null state frame */
116 pcb->pcb_fpregs.fpf_null = 0;
117 #if !defined(__mc68010__)
118 if (fputype)
119 m68881_restore(&pcb->pcb_fpregs);
120 #endif
121
122 #ifdef COMPAT_SUNOS
123 /* see m68k/sunos_syscall.c */
124 l->l_md.md_flags = 0;
125 #endif
126 }
127