Do not run mandoc for lintmanpages if MANPAGES is empty.
[netbsd-mini2440.git] / lib / libkvm / kvm_x86_64.c
blob36c16c12b88f2e0e96fc76ce1d58dcaa1b97bef5
1 /* $NetBSD: kvm_x86_64.c,v 1.5 2005/08/04 19:26:02 fvdl Exp $ */
3 /*-
4 * Copyright (c) 1989, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
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.
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. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
36 #include <sys/cdefs.h>
37 #if defined(LIBC_SCCS) && !defined(lint)
38 #if 0
39 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
40 #else
41 __RCSID("$NetBSD: kvm_x86_64.c,v 1.5 2005/08/04 19:26:02 fvdl Exp $");
42 #endif
43 #endif /* LIBC_SCCS and not lint */
46 * x86-64 machine dependent routines for kvm.
49 #include <sys/param.h>
50 #include <sys/user.h>
51 #include <sys/proc.h>
52 #include <sys/stat.h>
53 #include <sys/kcore.h>
54 #include <machine/kcore.h>
55 #include <stdlib.h>
56 #include <unistd.h>
57 #include <nlist.h>
58 #include <kvm.h>
60 #include <uvm/uvm_extern.h>
62 #include <limits.h>
63 #include <db.h>
65 #include "kvm_private.h"
67 #include <machine/pmap.h>
68 #include <machine/pte.h>
69 #include <machine/vmparam.h>
71 void
72 _kvm_freevtop(kd)
73 kvm_t *kd;
76 /* Not actually used for anything right now, but safe. */
77 if (kd->vmst != 0)
78 free(kd->vmst);
81 /*ARGSUSED*/
82 int
83 _kvm_initvtop(kd)
84 kvm_t *kd;
87 return (0);
91 * Translate a kernel virtual address to a physical address.
93 int
94 _kvm_kvatop(kd, va, pa)
95 kvm_t *kd;
96 u_long va;
97 u_long *pa;
99 cpu_kcore_hdr_t *cpu_kh;
100 u_long page_off;
101 pd_entry_t pde;
102 pt_entry_t pte;
103 paddr_t pde_pa, pte_pa;
105 if (ISALIVE(kd)) {
106 _kvm_err(kd, 0, "vatop called in live kernel!");
107 return (0);
110 cpu_kh = kd->cpu_data;
111 page_off = va & PGOFSET;
114 * Find and read all entries to get to the pa.
118 * Level 4.
120 pde_pa = cpu_kh->ptdpaddr + (pl4_pi(va) * sizeof(pd_entry_t));
121 if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
122 _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
123 _kvm_syserr(kd, 0, "could not read PT level 4 entry");
124 goto lose;
126 if ((pde & PG_V) == 0) {
127 _kvm_err(kd, 0, "invalid translation (invalid level 4 PDE)");
128 goto lose;
132 * Level 3.
134 pde_pa = (pde & PG_FRAME) + (pl3_pi(va) * sizeof(pd_entry_t));
135 if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
136 _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
137 _kvm_syserr(kd, 0, "could not read PT level 3 entry");
138 goto lose;
140 if ((pde & PG_V) == 0) {
141 _kvm_err(kd, 0, "invalid translation (invalid level 3 PDE)");
142 goto lose;
146 * Level 2.
148 pde_pa = (pde & PG_FRAME) + (pl2_pi(va) * sizeof(pd_entry_t));
149 if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
150 _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
151 _kvm_syserr(kd, 0, "could not read PT level 2 entry");
152 goto lose;
154 if ((pde & PG_V) == 0) {
155 _kvm_err(kd, 0, "invalid translation (invalid level 2 PDE)");
156 goto lose;
161 * Level 1.
163 pte_pa = (pde & PG_FRAME) + (pl1_pi(va) * sizeof(pt_entry_t));
164 if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
165 _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
166 _kvm_syserr(kd, 0, "could not read PTE");
167 goto lose;
170 * Validate the PTE and return the physical address.
172 if ((pte & PG_V) == 0) {
173 _kvm_err(kd, 0, "invalid translation (invalid PTE)");
174 goto lose;
176 *pa = (pte & PG_FRAME) + page_off;
177 return (int)(NBPG - page_off);
179 lose:
180 *pa = (u_long)~0L;
181 return (0);
185 * Translate a physical address to a file-offset in the crash dump.
187 off_t
188 _kvm_pa2off(kd, pa)
189 kvm_t *kd;
190 u_long pa;
192 cpu_kcore_hdr_t *cpu_kh;
193 phys_ram_seg_t *ramsegs;
194 off_t off;
195 int i;
197 cpu_kh = kd->cpu_data;
198 ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
200 off = 0;
201 for (i = 0; i < cpu_kh->nmemsegs; i++) {
202 if (pa >= ramsegs[i].start &&
203 (pa - ramsegs[i].start) < ramsegs[i].size) {
204 off += (pa - ramsegs[i].start);
205 break;
207 off += ramsegs[i].size;
210 return (kd->dump_off + off);
214 * Machine-dependent initialization for ALL open kvm descriptors,
215 * not just those for a kernel crash dump. Some architectures
216 * have to deal with these NOT being constants! (i.e. m68k)
219 _kvm_mdopen(kd)
220 kvm_t *kd;
223 kd->usrstack = USRSTACK;
224 kd->min_uva = VM_MIN_ADDRESS;
225 kd->max_uva = VM_MAXUSER_ADDRESS;
227 return (0);