kvm_arm.c (09c817ba36db7c3a4ff5e25ac55816ca181a403d) kvm_arm.c (8cffa1b42d0ea5814e76200faadc63da8474cb39)
1/* $NetBSD: kvm_powerpc.c,v 1.4 1998/02/03 06:50:07 mycroft Exp $ */
2
1/*-
3/*-
2 * Copyright (c) 2005 Olivier Houchard
3 * Copyright (c) 1989, 1992, 1993
4 * The Regents of the University of California. All rights reserved.
4 * Copyright (C) 1996 Wolfgang Solfrank.
5 * Copyright (C) 1996 TooLs GmbH.
6 * All rights reserved.
5 *
7 *
6 * This code is derived from software developed by the Computer Systems
7 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
8 * BG 91-66 and contributed to Berkeley.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

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34/*
35 * ARM machine dependent routines for kvm.
36 */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41#include <sys/param.h>
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

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34/*
35 * ARM machine dependent routines for kvm.
36 */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41#include <sys/param.h>
42#include <sys/elf32.h>
43#include <sys/mman.h>
44
45#include <vm/vm.h>
42
43#include <vm/vm.h>
46#include <vm/vm_param.h>
47#include <vm/pmap.h>
48
44
49#include <machine/pmap.h>
50
51#include <db.h>
52#include <limits.h>
53#include <kvm.h>
54#include <stdlib.h>
45#include <db.h>
46#include <limits.h>
47#include <kvm.h>
48#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "kvm_private.h"
59
49
50#include "kvm_private.h"
51
60/* minidump must be the first item! */
61struct vmstate {
62 int minidump; /* 1 = minidump mode */
63 pd_entry_t *l1pt;
64 void *mmapbase;
65 size_t mmapsize;
66};
67
68static int
69_kvm_maphdrs(kvm_t *kd, size_t sz)
70{
71 struct vmstate *vm = kd->vmst;
72
73 /* munmap() previous mmap(). */
74 if (vm->mmapbase != NULL) {
75 munmap(vm->mmapbase, vm->mmapsize);
76 vm->mmapbase = NULL;
77 }
78
79 vm->mmapsize = sz;
80 vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
81 if (vm->mmapbase == MAP_FAILED) {
82 _kvm_err(kd, kd->program, "cannot mmap corefile");
83 return (-1);
84 }
85
86 return (0);
87}
88
89/*
90 * Translate a physical memory address to a file-offset in the crash-dump.
91 */
92static size_t
93_kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs, size_t pgsz)
94{
95 Elf32_Ehdr *e = kd->vmst->mmapbase;
96 Elf32_Phdr *p = (Elf32_Phdr*)((char*)e + e->e_phoff);
97 int n = e->e_phnum;
98
99 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
100 p++, n--;
101 if (n == 0)
102 return (0);
103
104 *ofs = (pa - p->p_paddr) + p->p_offset;
105 if (pgsz == 0)
106 return (p->p_memsz - (pa - p->p_paddr));
107 return (pgsz - ((size_t)pa & (pgsz - 1)));
108}
109
110void
52void
111_kvm_freevtop(kvm_t *kd)
53_kvm_freevtop(kd)
54 kvm_t *kd;
112{
55{
113 if (kd->vmst != 0) {
114 if (kd->vmst->minidump)
115 return (_kvm_minidump_freevtop(kd));
116 if (kd->vmst->mmapbase != NULL)
117 munmap(kd->vmst->mmapbase, kd->vmst->mmapsize);
56 if (kd->vmst != 0)
118 free(kd->vmst);
57 free(kd->vmst);
119 kd->vmst = NULL;
120 }
121}
122
123int
58}
59
60int
124_kvm_initvtop(kvm_t *kd)
61_kvm_initvtop(kd)
62 kvm_t *kd;
125{
63{
126 struct vmstate *vm;
127 struct nlist nlist[2];
128 u_long kernbase, physaddr, pa;
129 pd_entry_t *l1pt;
130 Elf32_Ehdr *ehdr;
131 size_t hdrsz;
132 char minihdr[8];
133
134 if (!kd->rawdump) {
135 if (pread(kd->pmfd, &minihdr, 8, 0) == 8) {
136 if (memcmp(&minihdr, "minidump", 8) == 0)
137 return (_kvm_minidump_initvtop(kd));
138 } else {
139 _kvm_err(kd, kd->program, "cannot read header");
140 return (-1);
141 }
142 }
143
144 vm = _kvm_malloc(kd, sizeof(*vm));
145 if (vm == 0) {
146 _kvm_err(kd, kd->program, "cannot allocate vm");
147 return (-1);
148 }
149 kd->vmst = vm;
150 vm->l1pt = NULL;
151 if (_kvm_maphdrs(kd, sizeof(Elf32_Ehdr)) == -1)
152 return (-1);
153 ehdr = kd->vmst->mmapbase;
154 hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
155 if (_kvm_maphdrs(kd, hdrsz) == -1)
156 return (-1);
157 nlist[0].n_name = "kernbase";
158 nlist[1].n_name = NULL;
159 if (kvm_nlist(kd, nlist) != 0)
160 kernbase = KERNBASE;
161 else
162 kernbase = nlist[0].n_value;
163
164 nlist[0].n_name = "physaddr";
165 if (kvm_nlist(kd, nlist) != 0) {
166 _kvm_err(kd, kd->program, "couldn't get phys addr");
167 return (-1);
168 }
169 physaddr = nlist[0].n_value;
170 nlist[0].n_name = "kernel_l1pa";
171 if (kvm_nlist(kd, nlist) != 0) {
172 _kvm_err(kd, kd->program, "bad namelist");
173 return (-1);
174 }
175 if (kvm_read(kd, (nlist[0].n_value - kernbase + physaddr), &pa,
176 sizeof(pa)) != sizeof(pa)) {
177 _kvm_err(kd, kd->program, "cannot read kernel_l1pa");
178 return (-1);
179 }
180 l1pt = _kvm_malloc(kd, L1_TABLE_SIZE);
181 if (kvm_read(kd, pa, l1pt, L1_TABLE_SIZE) != L1_TABLE_SIZE) {
182 _kvm_err(kd, kd->program, "cannot read l1pt");
183 free(l1pt);
184 return (-1);
185 }
186 vm->l1pt = l1pt;
187 return 0;
188}
189
64 return 0;
65}
66
190/* from arm/pmap.c */
191#define L1_IDX(va) (((vm_offset_t)(va)) >> L1_S_SHIFT)
192/* from arm/pmap.h */
193#define L1_TYPE_INV 0x00 /* Invalid (fault) */
194#define L1_TYPE_C 0x01 /* Coarse L2 */
195#define L1_TYPE_S 0x02 /* Section */
196#define L1_TYPE_F 0x03 /* Fine L2 */
197#define L1_TYPE_MASK 0x03 /* mask of type bits */
198
199#define l1pte_section_p(pde) (((pde) & L1_TYPE_MASK) == L1_TYPE_S)
200#define l1pte_valid(pde) ((pde) != 0)
201#define l2pte_valid(pte) ((pte) != 0)
202#define l2pte_index(v) (((v) & L2_ADDR_BITS) >> L2_S_SHIFT)
203
204
205int
67int
206_kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
68_kvm_kvatop(kd, va, pa)
69 kvm_t *kd;
70 u_long va;
71 u_long *pa;
207{
72{
208 u_long offset = va & (PAGE_SIZE - 1);
209 struct vmstate *vm = kd->vmst;
210 pd_entry_t pd;
211 pt_entry_t pte;
212 u_long pte_pa;
73 _kvm_err(kd, 0, "vatop not yet implemented!");
74 return 0;
75}
213
76
214 if (kd->vmst->minidump)
215 return (_kvm_minidump_kvatop(kd, va, pa));
216
217 if (vm->l1pt == NULL)
218 return (_kvm_pa2off(kd, va, pa, PAGE_SIZE));
219 pd = vm->l1pt[L1_IDX(va)];
220 if (!l1pte_valid(pd))
221 goto invalid;
222 if (l1pte_section_p(pd)) {
223 /* 1MB section mapping. */
224 *pa = ((u_long)pd & L1_S_ADDR_MASK) + (va & L1_S_OFFSET);
225 return (_kvm_pa2off(kd, *pa, pa, L1_S_SIZE));
226 }
227 pte_pa = (pd & L1_ADDR_MASK) + l2pte_index(va) * sizeof(pte);
228 _kvm_pa2off(kd, pte_pa, (off_t *)&pte_pa, L1_S_SIZE);
229 if (lseek(kd->pmfd, pte_pa, 0) == -1) {
230 _kvm_syserr(kd, kd->program, "_kvm_kvatop: lseek");
231 goto invalid;
232 }
233 if (read(kd->pmfd, &pte, sizeof(pte)) != sizeof (pte)) {
234 _kvm_syserr(kd, kd->program, "_kvm_kvatop: read");
235 goto invalid;
236 }
237 if (!l2pte_valid(pte)) {
238 goto invalid;
239 }
240 if ((pte & L2_TYPE_MASK) == L2_TYPE_L) {
241 *pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
242 return (_kvm_pa2off(kd, *pa, pa, L2_L_SIZE));
243 }
244 *pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
245 return (_kvm_pa2off(kd, *pa, pa, PAGE_SIZE));
246invalid:
247 _kvm_err(kd, 0, "Invalid address (%x)", va);
77off_t
78_kvm_pa2off(kd, pa)
79 kvm_t *kd;
80 u_long pa;
81{
82 _kvm_err(kd, 0, "pa2off not yet implemented!");
248 return 0;
249}
250
251/*
252 * Machine-dependent initialization for ALL open kvm descriptors,
253 * not just those for a kernel crash dump. Some architectures
254 * have to deal with these NOT being constants! (i.e. m68k)
255 */

--- 13 unchanged lines hidden --- 		83 return 0;
84}
85
86/*
87 * Machine-dependent initialization for ALL open kvm descriptors,
88 * not just those for a kernel crash dump. Some architectures
89 * have to deal with these NOT being constants! (i.e. m68k)
90 */

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