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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* $OpenBSD: kvm_sparc.c,v 1.11 2006/03/20 15:11:48 mickey Exp $ */
/* $NetBSD: kvm_sparc.c,v 1.9 1996/04/01 19:23:03 cgd Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software developed by the Computer Systems
* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
* BG 91-66 and contributed to Berkeley.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93";
#else
static char *rcsid = "$OpenBSD: kvm_sparc.c,v 1.11 2006/03/20 15:11:48 mickey Exp $";
#endif
#endif /* LIBC_SCCS and not lint */
/*
* Sparc machine dependent routines for kvm. Hopefully, the forthcoming
* vm code will one day obsolete this module.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#include <uvm/uvm_extern.h>
#include <machine/vmparam.h>
#include <machine/pmap.h>
#include <machine/autoconf.h>
#include <machine/kcore.h>
#include <limits.h>
#include <db.h>
#include "kvm_private.h"
static int cputyp = -1;
static int pgshift;
static int nptesg; /* [sun4/sun4c] only */
#define VA_VPG(va) ((cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) \
? VA_SUN4C_VPG(va) \
: VA_SUN4_VPG(va))
#define VA_OFF(va) (va & (kd->nbpg - 1))
void
_kvm_freevtop(kvm_t *kd)
{
if (kd->vmst != NULL) {
_kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
kd->vmst = NULL;
}
}
/*
* Prepare for translation of kernel virtual addresses into offsets
* into crash dump files. We use the MMU specific goop written at the
* front of the crash dump by pmap_dumpmmu().
*/
int
_kvm_initvtop(kvm_t *kd)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
switch (cputyp = cpup->cputype) {
case CPU_SUN4:
kd->nbpg = 8196;
pgshift = 13;
break;
case CPU_SUN4C:
case CPU_SUN4M:
kd->nbpg = 4096;
pgshift = 12;
break;
default:
_kvm_err(kd, kd->program, "Unsupported CPU type");
return (-1);
}
nptesg = NBPSG / kd->nbpg;
return (0);
}
/*
* Translate a kernel virtual address to a physical address using the
* mapping information in kd->vm. Returns the result in pa, and returns
* the number of bytes that are contiguously available from this
* physical address. This routine is used only for crashdumps.
*/
int
_kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa)
{
if (cputyp == -1)
if (_kvm_initvtop(kd) != 0)
return (-1);
return ((cputyp == CPU_SUN4M) ? _kvm_kvatop4m(kd, va, pa) :
_kvm_kvatop44c(kd, va, pa));
}
/*
* (note: sun4 3-level MMU not yet supported)
*/
int
_kvm_kvatop44c(kvm_t *kd, u_long va, u_long *pa)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
int vr, vs, pte, *ptes;
struct regmap *rp;
struct segmap *sp;
if (va < KERNBASE)
goto err;
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
* ptes[cpup->npmegs];
*/
ptes = (int *)((int)kd->cpu_data + cpup->pmegoffset);
vr = VA_VREG(va);
vs = VA_VSEG(va);
sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs];
if (sp->sg_npte == 0)
goto err;
if (sp->sg_pmeg == cpup->npmeg - 1) /* =seginval */
goto err;
pte = ptes[sp->sg_pmeg * nptesg + VA_VPG(va)];
if ((pte & PG_V) != 0) {
long p, off = VA_OFF(va);
p = (pte & PG_PFNUM) << pgshift;
*pa = p + off;
return (kd->nbpg - off);
}
err:
_kvm_err(kd, 0, "invalid address (%x)", va);
return (0);
}
int
_kvm_kvatop4m(kvm_t *kd, u_long va, u_long *pa)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
struct regmap *rp;
struct segmap *sp;
int vr, vs, pte;
off_t foff;
if (va < KERNBASE)
goto err;
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
*/
vr = VA_VREG(va);
vs = VA_VSEG(va);
sp = &cpup->segmap_store[(vr-NUREG)*NSEGRG + vs];
if (sp->sg_npte == 0)
goto err;
/* XXX - assume page tables in initial kernel DATA or BSS. */
foff = _kvm_pa2off(kd, (u_long)&sp->sg_pte[VA_VPG(va)] - KERNBASE);
if (foff == (off_t)-1)
return (0);
if (_kvm_pread(kd, kd->pmfd, (void *)&pte, sizeof(pte), foff) < 0) {
_kvm_err(kd, kd->program, "cannot read pte for %x", va);
return (0);
}
if ((pte & SRMMU_TETYPE) == SRMMU_TEPTE) {
long p, off = VA_OFF(va);
p = (pte & SRMMU_PPNMASK) << SRMMU_PPNPASHIFT;
*pa = p + off;
return (kd->nbpg - off);
}
err:
_kvm_err(kd, 0, "invalid address (%x)", va);
return (0);
}
/*
* Translate a physical address to a file-offset in the crash-dump.
*/
off_t
_kvm_pa2off(kvm_t *kd, paddr_t pa)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
phys_ram_seg_t *mp;
off_t off;
int nmem;
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
*/
mp = (phys_ram_seg_t *)((int)kd->cpu_data + cpup->memsegoffset);
off = 0;
/* Translate (sparse) pfnum to (packed) dump offset */
for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
if (mp->start <= pa && pa < mp->start + mp->size)
break;
off += mp->size;
}
if (nmem < 0) {
_kvm_err(kd, 0, "invalid address (%x)", pa);
return (-1);
}
return (kd->dump_off + off + pa - mp->start);
}
|
