Annotation of src/lib/libkvm/kvm_x86_64.c, Revision 1.10
1.10 ! dsl 1: /* $NetBSD: kvm_x86_64.c,v 1.9 2012/01/10 16:01:16 chs Exp $ */
1.1 fvdl 2:
3: /*-
4: * Copyright (c) 1989, 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.
1.4 agc 19: * 3. Neither the name of the University nor the names of its contributors
1.1 fvdl 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
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.
34: */
35:
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
1.10 ! dsl 41: __RCSID("$NetBSD: kvm_x86_64.c,v 1.9 2012/01/10 16:01:16 chs Exp $");
1.1 fvdl 42: #endif
43: #endif /* LIBC_SCCS and not lint */
44:
45: /*
46: * x86-64 machine dependent routines for kvm.
47: */
48:
49: #include <sys/param.h>
50: #include <sys/proc.h>
51: #include <sys/stat.h>
52: #include <sys/kcore.h>
1.8 jym 53: #include <sys/types.h>
54:
1.1 fvdl 55: #include <stdlib.h>
56: #include <unistd.h>
57: #include <nlist.h>
58: #include <kvm.h>
59:
60: #include <uvm/uvm_extern.h>
61:
62: #include <limits.h>
63: #include <db.h>
64:
65: #include "kvm_private.h"
66:
1.8 jym 67: #include <machine/kcore.h>
1.2 matt 68: #include <machine/pmap.h>
1.1 fvdl 69: #include <machine/pte.h>
1.2 matt 70: #include <machine/vmparam.h>
1.1 fvdl 71:
72: void
1.7 jym 73: _kvm_freevtop(kvm_t *kd)
1.1 fvdl 74: {
75:
76: /* Not actually used for anything right now, but safe. */
77: if (kd->vmst != 0)
78: free(kd->vmst);
79: }
80:
81: /*ARGSUSED*/
82: int
1.7 jym 83: _kvm_initvtop(kvm_t *kd)
1.1 fvdl 84: {
85:
86: return (0);
87: }
88:
89: /*
90: * Translate a kernel virtual address to a physical address.
91: */
92: int
1.8 jym 93: _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
1.1 fvdl 94: {
95: cpu_kcore_hdr_t *cpu_kh;
96: u_long page_off;
97: pd_entry_t pde;
98: pt_entry_t pte;
1.3 fvdl 99: paddr_t pde_pa, pte_pa;
1.1 fvdl 100:
101: if (ISALIVE(kd)) {
102: _kvm_err(kd, 0, "vatop called in live kernel!");
103: return (0);
104: }
105:
106: cpu_kh = kd->cpu_data;
107:
108: /*
1.3 fvdl 109: * Find and read all entries to get to the pa.
110: */
111:
112: /*
113: * Level 4.
114: */
1.5 fvdl 115: pde_pa = cpu_kh->ptdpaddr + (pl4_pi(va) * sizeof(pd_entry_t));
1.6 ad 116: if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
1.3 fvdl 117: _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
118: _kvm_syserr(kd, 0, "could not read PT level 4 entry");
119: goto lose;
120: }
121: if ((pde & PG_V) == 0) {
122: _kvm_err(kd, 0, "invalid translation (invalid level 4 PDE)");
123: goto lose;
124: }
125:
126: /*
127: * Level 3.
1.1 fvdl 128: */
1.5 fvdl 129: pde_pa = (pde & PG_FRAME) + (pl3_pi(va) * sizeof(pd_entry_t));
1.6 ad 130: if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
1.1 fvdl 131: _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
1.3 fvdl 132: _kvm_syserr(kd, 0, "could not read PT level 3 entry");
133: goto lose;
134: }
135: if ((pde & PG_V) == 0) {
136: _kvm_err(kd, 0, "invalid translation (invalid level 3 PDE)");
1.1 fvdl 137: goto lose;
138: }
1.9 chs 139: if (pde & PG_PS) {
140: page_off = va & (NBPD_L3 - 1);
141: *pa = (pde & PG_1GFRAME) + page_off;
142: return (int)(NBPD_L3 - page_off);
143: }
1.1 fvdl 144:
145: /*
1.3 fvdl 146: * Level 2.
1.1 fvdl 147: */
1.5 fvdl 148: pde_pa = (pde & PG_FRAME) + (pl2_pi(va) * sizeof(pd_entry_t));
1.6 ad 149: if (_kvm_pread(kd, kd->pmfd, (void *)&pde, sizeof(pde),
1.3 fvdl 150: _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) {
151: _kvm_syserr(kd, 0, "could not read PT level 2 entry");
152: goto lose;
153: }
1.1 fvdl 154: if ((pde & PG_V) == 0) {
1.3 fvdl 155: _kvm_err(kd, 0, "invalid translation (invalid level 2 PDE)");
1.1 fvdl 156: goto lose;
157: }
1.9 chs 158: if (pde & PG_PS) {
159: page_off = va & (NBPD_L2 - 1);
160: *pa = (pde & PG_2MFRAME) + page_off;
161: return (int)(NBPD_L2 - page_off);
162: }
1.3 fvdl 163:
164: /*
165: * Level 1.
166: */
1.5 fvdl 167: pte_pa = (pde & PG_FRAME) + (pl1_pi(va) * sizeof(pt_entry_t));
1.6 ad 168: if (_kvm_pread(kd, kd->pmfd, (void *) &pte, sizeof(pte),
1.1 fvdl 169: _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) {
170: _kvm_syserr(kd, 0, "could not read PTE");
171: goto lose;
172: }
173: /*
174: * Validate the PTE and return the physical address.
175: */
176: if ((pte & PG_V) == 0) {
177: _kvm_err(kd, 0, "invalid translation (invalid PTE)");
178: goto lose;
179: }
1.9 chs 180: page_off = va & PGOFSET;
1.1 fvdl 181: *pa = (pte & PG_FRAME) + page_off;
182: return (int)(NBPG - page_off);
183:
184: lose:
185: *pa = (u_long)~0L;
186: return (0);
187: }
188:
189: /*
190: * Translate a physical address to a file-offset in the crash dump.
191: */
192: off_t
1.8 jym 193: _kvm_pa2off(kvm_t *kd, paddr_t pa)
1.1 fvdl 194: {
195: cpu_kcore_hdr_t *cpu_kh;
196: phys_ram_seg_t *ramsegs;
197: off_t off;
198: int i;
199:
200: cpu_kh = kd->cpu_data;
201: ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
202:
203: off = 0;
204: for (i = 0; i < cpu_kh->nmemsegs; i++) {
205: if (pa >= ramsegs[i].start &&
206: (pa - ramsegs[i].start) < ramsegs[i].size) {
207: off += (pa - ramsegs[i].start);
208: break;
209: }
210: off += ramsegs[i].size;
211: }
212:
213: return (kd->dump_off + off);
214: }
215:
216: /*
217: * Machine-dependent initialization for ALL open kvm descriptors,
218: * not just those for a kernel crash dump. Some architectures
219: * have to deal with these NOT being constants! (i.e. m68k)
220: */
221: int
1.7 jym 222: _kvm_mdopen(kvm_t *kd)
1.1 fvdl 223: {
224:
225: kd->usrstack = USRSTACK;
226: kd->min_uva = VM_MIN_ADDRESS;
227: kd->max_uva = VM_MAXUSER_ADDRESS;
228:
229: return (0);
230: }
CVSweb <webmaster@jp.NetBSD.org>