xref: /netbsd-src/lib/libkvm/kvm_vax.c (revision 2a399c6883d870daece976daec6ffa7bb7f934ce)
1 /*	$NetBSD: kvm_vax.c,v 1.6 1997/10/20 12:49:50 ragge Exp $ */
2 
3 /*-
4  * Copyright (c) 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software developed by the Computer Systems
8  * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
9  * BG 91-66 and contributed to Berkeley.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *	This product includes software developed by the University of
22  *	California, Berkeley and its contributors.
23  * 4. Neither the name of the University nor the names of its contributors
24  *    may be used to endorse or promote products derived from this software
25  *    without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37  * SUCH DAMAGE.
38  */
39 
40 /*
41  * VAX machine dependent routines for kvm.  Hopefully, the forthcoming
42  * vm code will one day obsolete this module.  Furthermore, I hope it
43  * gets here soon, because this basically is an error stub! (sorry)
44  * This code may not work anyway.
45  */
46 
47 #include <sys/param.h>
48 #include <sys/user.h>
49 #include <sys/proc.h>
50 #include <sys/stat.h>
51 #include <unistd.h>
52 #include <nlist.h>
53 #include <stdlib.h>
54 #include <kvm.h>
55 
56 #include <vm/vm.h>
57 #include <vm/vm_param.h>
58 
59 #include <limits.h>
60 #include <db.h>
61 
62 #include "kvm_private.h"
63 
64 struct vmstate {
65 	u_long end;
66 };
67 
68 void
69 _kvm_freevtop(kd)
70 	kvm_t *kd;
71 {
72 	if (kd->vmst != 0)
73 		free(kd->vmst);
74 }
75 
76 int
77 _kvm_initvtop(kd)
78 	kvm_t *kd;
79 {
80 	register struct vmstate *vm;
81 	struct stat st;
82 	struct nlist nlist[2];
83 
84 	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
85 	if (vm == 0)
86 		return (-1);
87 
88 	kd->vmst = vm;
89 
90 	if (fstat(kd->pmfd, &st) < 0)
91 		return (-1);
92 
93 	/* Get end of kernel address */
94 	nlist[0].n_name = "_end";
95 	nlist[1].n_name = 0;
96 	if (kvm_nlist(kd, nlist) != 0) {
97 		_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
98 		return (-1);
99 	}
100 	vm->end = (u_long)nlist[0].n_value;
101 
102 	return (0);
103 }
104 
105 #define VA_OFF(va) (va & (NBPG - 1))
106 
107 /*
108  * Translate a kernel virtual address to a physical address using the
109  * mapping information in kd->vm.  Returns the result in pa, and returns
110  * the number of bytes that are contiguously available from this
111  * physical address.  This routine is used only for crashdumps.
112  */
113 int
114 _kvm_kvatop(kd, va, pa)
115 	kvm_t *kd;
116 	u_long va;
117 	u_long *pa;
118 {
119 	register int end;
120 
121 	if (va < KERNBASE) {
122 		_kvm_err(kd, 0, "invalid address (%x<%x)", va, KERNBASE);
123 		return (0);
124 	}
125 
126 	end = kd->vmst->end;
127 	if (va >= end) {
128 		_kvm_err(kd, 0, "invalid address (%x>=%x)", va, end);
129 		return (0);
130 	}
131 
132 	*pa = (va - KERNBASE);
133 	return (end - va);
134 }
135 
136 /*
137  * Translate a physical address to a file-offset in the crash-dump.
138  * XXX - crash-dumps doesn't work anyway.
139  */
140 off_t
141 _kvm_pa2off(kd, pa)
142 	kvm_t   *kd;
143 	u_long  pa;
144 {
145 	return(kd->dump_off + pa);
146 }
147 
148 
149 /*
150  * Machine-dependent initialization for ALL open kvm descriptors,
151  * not just those for a kernel crash dump.  Some architectures
152  * have to deal with these NOT being constants!  (i.e. m68k)
153  */
154 int
155 _kvm_mdopen(kd)
156 	kvm_t	*kd;
157 {
158 
159 	kd->usrstack = USRSTACK;
160 	kd->min_uva = VM_MIN_ADDRESS;
161 	kd->max_uva = VM_MAXUSER_ADDRESS;
162 
163 	return (0);
164 }
165