2 * Copyright (c) 1989, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software developed by the Computer Systems
6 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
7 * BG 91-66 and contributed to Berkeley.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
44 * AMD64 machine dependent routines for kvm. Hopefully, the forthcoming
45 * vm code will one day obsolete this module.
48 #include <sys/param.h>
49 #include <sys/endian.h>
58 #include "kvm_private.h"
59 #include "kvm_amd64.h"
68 * Translate a physical memory address to a file-offset in the crash-dump.
71 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
73 struct vmstate *vm = kd->vmst;
79 return (AMD64_PAGE_SIZE - (pa & AMD64_PAGE_MASK));
84 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
88 *ofs = (pa - p->p_paddr) + p->p_offset;
89 return (AMD64_PAGE_SIZE - (pa & AMD64_PAGE_MASK));
93 _amd64_freevtop(kvm_t *kd)
95 struct vmstate *vm = kd->vmst;
105 _amd64_probe(kvm_t *kd)
108 return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_X86_64) &&
109 !_kvm_is_minidump(kd));
113 _amd64_initvtop(kvm_t *kd)
115 struct kvm_nlist nl[2];
120 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
121 if (kd->vmst == NULL) {
122 _kvm_err(kd, kd->program, "cannot allocate vm");
127 if (kd->rawdump == 0) {
128 if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
129 &kd->vmst->phdr) == -1)
133 nl[0].n_name = "kernbase";
136 if (kvm_nlist2(kd, nl) != 0) {
137 _kvm_err(kd, kd->program, "bad namelist - no kernbase");
140 kernbase = nl[0].n_value;
142 nl[0].n_name = "KPML4phys";
145 if (kvm_nlist2(kd, nl) != 0) {
146 _kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
149 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa, sizeof(pa)) !=
151 _kvm_err(kd, kd->program, "cannot read KPML4phys");
155 PML4 = _kvm_malloc(kd, AMD64_PAGE_SIZE);
157 _kvm_err(kd, kd->program, "cannot allocate PML4");
160 if (kvm_read2(kd, pa, PML4, AMD64_PAGE_SIZE) != AMD64_PAGE_SIZE) {
161 _kvm_err(kd, kd->program, "cannot read KPML4phys");
165 kd->vmst->PML4 = PML4;
170 _amd64_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
173 amd64_physaddr_t offset;
174 amd64_physaddr_t pdpe_pa;
175 amd64_physaddr_t pde_pa;
176 amd64_physaddr_t pte_pa;
190 offset = va & AMD64_PAGE_MASK;
193 * If we are initializing (kernel page table descriptor pointer
194 * not yet set) then return pa == va to avoid infinite recursion.
196 if (vm->PML4 == NULL) {
197 s = _kvm_pa2off(kd, va, pa);
199 _kvm_err(kd, kd->program,
200 "_amd64_vatop: bootstrap data not in dump");
203 return (AMD64_PAGE_SIZE - offset);
206 pml4eindex = (va >> AMD64_PML4SHIFT) & (AMD64_NPML4EPG - 1);
207 pml4e = le64toh(vm->PML4[pml4eindex]);
208 if ((pml4e & AMD64_PG_V) == 0) {
209 _kvm_err(kd, kd->program, "_amd64_vatop: pml4e not valid");
213 pdpeindex = (va >> AMD64_PDPSHIFT) & (AMD64_NPDPEPG - 1);
214 pdpe_pa = (pml4e & AMD64_PG_FRAME) + (pdpeindex * sizeof(amd64_pdpe_t));
216 s = _kvm_pa2off(kd, pdpe_pa, &ofs);
217 if (s < sizeof(pdpe)) {
218 _kvm_err(kd, kd->program, "_amd64_vatop: pdpe_pa not found");
221 if (pread(kd->pmfd, &pdpe, sizeof(pdpe), ofs) != sizeof(pdpe)) {
222 _kvm_syserr(kd, kd->program, "_amd64_vatop: read pdpe");
225 pdpe = le64toh(pdpe);
226 if ((pdpe & AMD64_PG_V) == 0) {
227 _kvm_err(kd, kd->program, "_amd64_vatop: pdpe not valid");
231 if (pdpe & AMD64_PG_PS) {
233 * No next-level page table; pdpe describes one 1GB page.
235 a = (pdpe & AMD64_PG_1GB_FRAME) + (va & AMD64_PDPMASK);
236 s = _kvm_pa2off(kd, a, pa);
238 _kvm_err(kd, kd->program,
239 "_amd64_vatop: 1GB page address not in dump");
242 return (AMD64_NBPDP - (va & AMD64_PDPMASK));
245 pdeindex = (va >> AMD64_PDRSHIFT) & (AMD64_NPDEPG - 1);
246 pde_pa = (pdpe & AMD64_PG_FRAME) + (pdeindex * sizeof(amd64_pde_t));
248 s = _kvm_pa2off(kd, pde_pa, &ofs);
249 if (s < sizeof(pde)) {
250 _kvm_syserr(kd, kd->program, "_amd64_vatop: pde_pa not found");
253 if (pread(kd->pmfd, &pde, sizeof(pde), ofs) != sizeof(pde)) {
254 _kvm_syserr(kd, kd->program, "_amd64_vatop: read pde");
258 if ((pde & AMD64_PG_V) == 0) {
259 _kvm_err(kd, kd->program, "_amd64_vatop: pde not valid");
263 if (pde & AMD64_PG_PS) {
265 * No final-level page table; pde describes one 2MB page.
267 a = (pde & AMD64_PG_PS_FRAME) + (va & AMD64_PDRMASK);
268 s = _kvm_pa2off(kd, a, pa);
270 _kvm_err(kd, kd->program,
271 "_amd64_vatop: 2MB page address not in dump");
274 return (AMD64_NBPDR - (va & AMD64_PDRMASK));
277 pteindex = (va >> AMD64_PAGE_SHIFT) & (AMD64_NPTEPG - 1);
278 pte_pa = (pde & AMD64_PG_FRAME) + (pteindex * sizeof(amd64_pte_t));
280 s = _kvm_pa2off(kd, pte_pa, &ofs);
281 if (s < sizeof(pte)) {
282 _kvm_err(kd, kd->program, "_amd64_vatop: pte_pa not found");
285 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
286 _kvm_syserr(kd, kd->program, "_amd64_vatop: read");
289 if ((pte & AMD64_PG_V) == 0) {
290 _kvm_err(kd, kd->program, "_amd64_vatop: pte not valid");
294 a = (pte & AMD64_PG_FRAME) + offset;
295 s = _kvm_pa2off(kd, a, pa);
297 _kvm_err(kd, kd->program, "_amd64_vatop: address not in dump");
300 return (AMD64_PAGE_SIZE - offset);
303 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
308 _amd64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
312 _kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
315 return (_amd64_vatop(kd, va, pa));
319 _amd64_native(kvm_t *kd)
329 struct kvm_arch kvm_amd64 = {
330 .ka_probe = _amd64_probe,
331 .ka_initvtop = _amd64_initvtop,
332 .ka_freevtop = _amd64_freevtop,
333 .ka_kvatop = _amd64_kvatop,
334 .ka_native = _amd64_native,