kvm_x86_64.c revision 1.2.2.2
1 1.2.2.2 thorpej /* $NetBSD: kvm_x86_64.c,v 1.2.2.2 2002/12/19 02:26:25 thorpej Exp $ */ 2 1.2.2.2 thorpej 3 1.2.2.2 thorpej /*- 4 1.2.2.2 thorpej * Copyright (c) 1989, 1992, 1993 5 1.2.2.2 thorpej * The Regents of the University of California. All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * This code is derived from software developed by the Computer Systems 8 1.2.2.2 thorpej * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 9 1.2.2.2 thorpej * BG 91-66 and contributed to Berkeley. 10 1.2.2.2 thorpej * 11 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 12 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 13 1.2.2.2 thorpej * are met: 14 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 15 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 16 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 17 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 18 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 19 1.2.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 20 1.2.2.2 thorpej * must display the following acknowledgement: 21 1.2.2.2 thorpej * This product includes software developed by the University of 22 1.2.2.2 thorpej * California, Berkeley and its contributors. 23 1.2.2.2 thorpej * 4. Neither the name of the University nor the names of its contributors 24 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 25 1.2.2.2 thorpej * without specific prior written permission. 26 1.2.2.2 thorpej * 27 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 1.2.2.2 thorpej * SUCH DAMAGE. 38 1.2.2.2 thorpej */ 39 1.2.2.2 thorpej 40 1.2.2.2 thorpej #include <sys/cdefs.h> 41 1.2.2.2 thorpej #if defined(LIBC_SCCS) && !defined(lint) 42 1.2.2.2 thorpej #if 0 43 1.2.2.2 thorpej static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; 44 1.2.2.2 thorpej #else 45 1.2.2.2 thorpej __RCSID("$NetBSD: kvm_x86_64.c,v 1.2.2.2 2002/12/19 02:26:25 thorpej Exp $"); 46 1.2.2.2 thorpej #endif 47 1.2.2.2 thorpej #endif /* LIBC_SCCS and not lint */ 48 1.2.2.2 thorpej 49 1.2.2.2 thorpej /* 50 1.2.2.2 thorpej * x86-64 machine dependent routines for kvm. 51 1.2.2.2 thorpej */ 52 1.2.2.2 thorpej 53 1.2.2.2 thorpej #include <sys/param.h> 54 1.2.2.2 thorpej #include <sys/user.h> 55 1.2.2.2 thorpej #include <sys/proc.h> 56 1.2.2.2 thorpej #include <sys/stat.h> 57 1.2.2.2 thorpej #include <sys/kcore.h> 58 1.2.2.2 thorpej #include <machine/kcore.h> 59 1.2.2.2 thorpej #include <stdlib.h> 60 1.2.2.2 thorpej #include <unistd.h> 61 1.2.2.2 thorpej #include <nlist.h> 62 1.2.2.2 thorpej #include <kvm.h> 63 1.2.2.2 thorpej 64 1.2.2.2 thorpej #include <uvm/uvm_extern.h> 65 1.2.2.2 thorpej 66 1.2.2.2 thorpej #include <limits.h> 67 1.2.2.2 thorpej #include <db.h> 68 1.2.2.2 thorpej 69 1.2.2.2 thorpej #include "kvm_private.h" 70 1.2.2.2 thorpej 71 1.2.2.2 thorpej #include <machine/pmap.h> 72 1.2.2.2 thorpej #include <machine/pte.h> 73 1.2.2.2 thorpej #include <machine/vmparam.h> 74 1.2.2.2 thorpej 75 1.2.2.2 thorpej void 76 1.2.2.2 thorpej _kvm_freevtop(kd) 77 1.2.2.2 thorpej kvm_t *kd; 78 1.2.2.2 thorpej { 79 1.2.2.2 thorpej 80 1.2.2.2 thorpej /* Not actually used for anything right now, but safe. */ 81 1.2.2.2 thorpej if (kd->vmst != 0) 82 1.2.2.2 thorpej free(kd->vmst); 83 1.2.2.2 thorpej } 84 1.2.2.2 thorpej 85 1.2.2.2 thorpej /*ARGSUSED*/ 86 1.2.2.2 thorpej int 87 1.2.2.2 thorpej _kvm_initvtop(kd) 88 1.2.2.2 thorpej kvm_t *kd; 89 1.2.2.2 thorpej { 90 1.2.2.2 thorpej 91 1.2.2.2 thorpej return (0); 92 1.2.2.2 thorpej } 93 1.2.2.2 thorpej 94 1.2.2.2 thorpej /* 95 1.2.2.2 thorpej * Translate a kernel virtual address to a physical address. 96 1.2.2.2 thorpej */ 97 1.2.2.2 thorpej int 98 1.2.2.2 thorpej _kvm_kvatop(kd, va, pa) 99 1.2.2.2 thorpej kvm_t *kd; 100 1.2.2.2 thorpej u_long va; 101 1.2.2.2 thorpej u_long *pa; 102 1.2.2.2 thorpej { 103 1.2.2.2 thorpej cpu_kcore_hdr_t *cpu_kh; 104 1.2.2.2 thorpej u_long page_off; 105 1.2.2.2 thorpej pd_entry_t pde; 106 1.2.2.2 thorpej pt_entry_t pte; 107 1.2.2.2 thorpej paddr_t pde_pa, pte_pa; 108 1.2.2.2 thorpej 109 1.2.2.2 thorpej if (ISALIVE(kd)) { 110 1.2.2.2 thorpej _kvm_err(kd, 0, "vatop called in live kernel!"); 111 1.2.2.2 thorpej return (0); 112 1.2.2.2 thorpej } 113 1.2.2.2 thorpej 114 1.2.2.2 thorpej cpu_kh = kd->cpu_data; 115 1.2.2.2 thorpej page_off = va & PGOFSET; 116 1.2.2.2 thorpej 117 1.2.2.2 thorpej /* 118 1.2.2.2 thorpej * Find and read all entries to get to the pa. 119 1.2.2.2 thorpej */ 120 1.2.2.2 thorpej 121 1.2.2.2 thorpej /* 122 1.2.2.2 thorpej * Level 4. 123 1.2.2.2 thorpej */ 124 1.2.2.2 thorpej pde_pa = cpu_kh->ptdpaddr + (pl4_i(va) * sizeof(pd_entry_t)); 125 1.2.2.2 thorpej if (pread(kd->pmfd, (void *)&pde, sizeof(pde), 126 1.2.2.2 thorpej _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) { 127 1.2.2.2 thorpej _kvm_syserr(kd, 0, "could not read PT level 4 entry"); 128 1.2.2.2 thorpej goto lose; 129 1.2.2.2 thorpej } 130 1.2.2.2 thorpej if ((pde & PG_V) == 0) { 131 1.2.2.2 thorpej _kvm_err(kd, 0, "invalid translation (invalid level 4 PDE)"); 132 1.2.2.2 thorpej goto lose; 133 1.2.2.2 thorpej } 134 1.2.2.2 thorpej 135 1.2.2.2 thorpej /* 136 1.2.2.2 thorpej * Level 3. 137 1.2.2.2 thorpej */ 138 1.2.2.2 thorpej pde_pa = (pde_pa + PG_FRAME) + (pl3_i(va) * sizeof(pd_entry_t)); 139 1.2.2.2 thorpej if (pread(kd->pmfd, (void *)&pde, sizeof(pde), 140 1.2.2.2 thorpej _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) { 141 1.2.2.2 thorpej _kvm_syserr(kd, 0, "could not read PT level 3 entry"); 142 1.2.2.2 thorpej goto lose; 143 1.2.2.2 thorpej } 144 1.2.2.2 thorpej if ((pde & PG_V) == 0) { 145 1.2.2.2 thorpej _kvm_err(kd, 0, "invalid translation (invalid level 3 PDE)"); 146 1.2.2.2 thorpej goto lose; 147 1.2.2.2 thorpej } 148 1.2.2.2 thorpej 149 1.2.2.2 thorpej /* 150 1.2.2.2 thorpej * Level 2. 151 1.2.2.2 thorpej */ 152 1.2.2.2 thorpej pde_pa = (pde_pa & PG_FRAME) + (pl2_i(va) * sizeof(pd_entry_t)); 153 1.2.2.2 thorpej if (pread(kd->pmfd, (void *)&pde, sizeof(pde), 154 1.2.2.2 thorpej _kvm_pa2off(kd, pde_pa)) != sizeof(pde)) { 155 1.2.2.2 thorpej _kvm_syserr(kd, 0, "could not read PT level 2 entry"); 156 1.2.2.2 thorpej goto lose; 157 1.2.2.2 thorpej } 158 1.2.2.2 thorpej if ((pde & PG_V) == 0) { 159 1.2.2.2 thorpej _kvm_err(kd, 0, "invalid translation (invalid level 2 PDE)"); 160 1.2.2.2 thorpej goto lose; 161 1.2.2.2 thorpej } 162 1.2.2.2 thorpej 163 1.2.2.2 thorpej 164 1.2.2.2 thorpej /* 165 1.2.2.2 thorpej * Level 1. 166 1.2.2.2 thorpej */ 167 1.2.2.2 thorpej pte_pa = (pde_pa & PG_FRAME) + (pl1_i(va) * sizeof(pt_entry_t)); 168 1.2.2.2 thorpej if (pread(kd->pmfd, (void *) &pte, sizeof(pte), 169 1.2.2.2 thorpej _kvm_pa2off(kd, pte_pa)) != sizeof(pte)) { 170 1.2.2.2 thorpej _kvm_syserr(kd, 0, "could not read PTE"); 171 1.2.2.2 thorpej goto lose; 172 1.2.2.2 thorpej } 173 1.2.2.2 thorpej /* 174 1.2.2.2 thorpej * Validate the PTE and return the physical address. 175 1.2.2.2 thorpej */ 176 1.2.2.2 thorpej if ((pte & PG_V) == 0) { 177 1.2.2.2 thorpej _kvm_err(kd, 0, "invalid translation (invalid PTE)"); 178 1.2.2.2 thorpej goto lose; 179 1.2.2.2 thorpej } 180 1.2.2.2 thorpej *pa = (pte & PG_FRAME) + page_off; 181 1.2.2.2 thorpej return (int)(NBPG - page_off); 182 1.2.2.2 thorpej 183 1.2.2.2 thorpej lose: 184 1.2.2.2 thorpej *pa = (u_long)~0L; 185 1.2.2.2 thorpej return (0); 186 1.2.2.2 thorpej } 187 1.2.2.2 thorpej 188 1.2.2.2 thorpej /* 189 1.2.2.2 thorpej * Translate a physical address to a file-offset in the crash dump. 190 1.2.2.2 thorpej */ 191 1.2.2.2 thorpej off_t 192 1.2.2.2 thorpej _kvm_pa2off(kd, pa) 193 1.2.2.2 thorpej kvm_t *kd; 194 1.2.2.2 thorpej u_long pa; 195 1.2.2.2 thorpej { 196 1.2.2.2 thorpej cpu_kcore_hdr_t *cpu_kh; 197 1.2.2.2 thorpej phys_ram_seg_t *ramsegs; 198 1.2.2.2 thorpej off_t off; 199 1.2.2.2 thorpej int i; 200 1.2.2.2 thorpej 201 1.2.2.2 thorpej cpu_kh = kd->cpu_data; 202 1.2.2.2 thorpej ramsegs = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh)); 203 1.2.2.2 thorpej 204 1.2.2.2 thorpej off = 0; 205 1.2.2.2 thorpej for (i = 0; i < cpu_kh->nmemsegs; i++) { 206 1.2.2.2 thorpej if (pa >= ramsegs[i].start && 207 1.2.2.2 thorpej (pa - ramsegs[i].start) < ramsegs[i].size) { 208 1.2.2.2 thorpej off += (pa - ramsegs[i].start); 209 1.2.2.2 thorpej break; 210 1.2.2.2 thorpej } 211 1.2.2.2 thorpej off += ramsegs[i].size; 212 1.2.2.2 thorpej } 213 1.2.2.2 thorpej 214 1.2.2.2 thorpej return (kd->dump_off + off); 215 1.2.2.2 thorpej } 216 1.2.2.2 thorpej 217 1.2.2.2 thorpej /* 218 1.2.2.2 thorpej * Machine-dependent initialization for ALL open kvm descriptors, 219 1.2.2.2 thorpej * not just those for a kernel crash dump. Some architectures 220 1.2.2.2 thorpej * have to deal with these NOT being constants! (i.e. m68k) 221 1.2.2.2 thorpej */ 222 1.2.2.2 thorpej int 223 1.2.2.2 thorpej _kvm_mdopen(kd) 224 1.2.2.2 thorpej kvm_t *kd; 225 1.2.2.2 thorpej { 226 1.2.2.2 thorpej 227 1.2.2.2 thorpej kd->usrstack = USRSTACK; 228 1.2.2.2 thorpej kd->min_uva = VM_MIN_ADDRESS; 229 1.2.2.2 thorpej kd->max_uva = VM_MAXUSER_ADDRESS; 230 1.2.2.2 thorpej 231 1.2.2.2 thorpej return (0); 232 1.2.2.2 thorpej } 233
Indexes created Thu Oct 02 14:10:14 GMT 2025