1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* $NetBSD: kvm_arm.c,v 1.6 2010/09/20 23:23:16 jym Exp $ */
/*-
* Copyright (C) 1996 Wolfgang Solfrank.
* Copyright (C) 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from: kvm_powerpc.c,v 1.3 1997/09/19 04:00:23 thorpej Exp
*/
/*
* arm32 machine dependent routines for kvm.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: kvm_arm.c,v 1.6 2010/09/20 23:23:16 jym Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/kcore.h>
#include <sys/types.h>
#include <arm/kcore.h>
#include <arm/arm32/pte.h>
#include <stdlib.h>
#include <db.h>
#include <limits.h>
#include <kvm.h>
#include <unistd.h>
#include "kvm_private.h"
void
_kvm_freevtop(kvm_t * kd)
{
if (kd->vmst != 0)
free(kd->vmst);
}
int
_kvm_initvtop(kvm_t * kd)
{
return 0;
}
int
_kvm_kvatop(kvm_t * kd, vaddr_t va, paddr_t *pa)
{
cpu_kcore_hdr_t *cpu_kh;
pd_entry_t pde;
pt_entry_t pte;
paddr_t pde_pa, pte_pa;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return (0);
}
cpu_kh = kd->cpu_data;
if (cpu_kh->version != 1) {
_kvm_err(kd, 0, "unsupported kcore structure version");
return 0;
}
if (cpu_kh->flags != 0) {
_kvm_err(kd, 0, "kcore flags not supported");
return 0;
}
/*
* work out which L1 table we need
*/
if (va >= (cpu_kh->UserL1TableSize << 17))
pde_pa = cpu_kh->PAKernelL1Table;
else
pde_pa = cpu_kh->PAUserL1Table;
/*
* work out the offset into the L1 Table
*/
pde_pa += ((va >> 20) * sizeof(pd_entry_t));
if (_kvm_pread(kd, kd->pmfd, (void *) &pde, sizeof(pd_entry_t),
_kvm_pa2off(kd, pde_pa)) != sizeof(pd_entry_t)) {
_kvm_syserr(kd, 0, "could not read L1 entry");
return (0);
}
/*
* next work out what kind of record it is
*/
switch (pde & L1_TYPE_MASK) {
case L1_TYPE_S:
*pa = (pde & L1_S_FRAME) | (va & L1_S_OFFSET);
return L1_S_SIZE - (va & L1_S_OFFSET);
case L1_TYPE_C:
pte_pa = (pde & L1_C_ADDR_MASK)
| ((va & 0xff000) >> 10);
break;
case L1_TYPE_F:
pte_pa = (pde & L1_S_ADDR_MASK)
| ((va & 0xffc00) >> 8);
break;
default:
_kvm_syserr(kd, 0, "L1 entry is invalid");
return (0);
}
/*
* locate the pte and load it
*/
if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pt_entry_t),
_kvm_pa2off(kd, pte_pa)) != sizeof(pt_entry_t)) {
_kvm_syserr(kd, 0, "could not read L2 entry");
return (0);
}
switch (pte & L2_TYPE_MASK) {
case L2_TYPE_L:
*pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
return (L2_L_SIZE - (va & L2_L_OFFSET));
case L2_TYPE_S:
*pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
return (L2_S_SIZE - (va & L2_S_OFFSET));
case L2_TYPE_T:
*pa = (pte & L2_T_FRAME) | (va & L2_T_OFFSET);
return (L2_T_SIZE - (va & L2_T_OFFSET));
default:
_kvm_syserr(kd, 0, "L2 entry is invalid");
return (0);
}
_kvm_err(kd, 0, "vatop not yet implemented!");
return 0;
}
off_t
_kvm_pa2off(kvm_t * kd, u_long pa)
{
cpu_kcore_hdr_t *cpu_kh;
phys_ram_seg_t *ramsegs;
off_t off;
int i;
cpu_kh = kd->cpu_data;
ramsegs = (void *) ((char *) (void *) cpu_kh + cpu_kh->omemsegs);
off = 0;
for (i = 0; i < cpu_kh->nmemsegs; i++) {
if (pa >= ramsegs[i].start &&
(pa - ramsegs[i].start) < ramsegs[i].size) {
off += (pa - ramsegs[i].start);
break;
}
off += ramsegs[i].size;
}
return (kd->dump_off + off);
}
/*
* Machine-dependent initialization for ALL open kvm descriptors,
* not just those for a kernel crash dump. Some architectures
* have to deal with these NOT being constants! (i.e. arm)
*/
int
_kvm_mdopen(kvm_t * kd)
{
uintptr_t max_uva;
extern struct ps_strings *__ps_strings;
#if 0 /* XXX - These vary across arm machines... */
kd->usrstack = USRSTACK;
kd->min_uva = VM_MIN_ADDRESS;
kd->max_uva = VM_MAXUSER_ADDRESS;
#endif
/* This is somewhat hack-ish, but it works. */
max_uva = (uintptr_t) (__ps_strings + 1);
kd->usrstack = max_uva;
kd->max_uva = max_uva;
kd->min_uva = 0;
return (0);
}
|
