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 * 3. 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
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * i386 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 <machine/vmparam.h> /* For KERNBASE. */
63 #include "kvm_private.h"
74 * Translate a physical memory address to a file-offset in the crash-dump.
77 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
79 struct vmstate *vm = kd->vmst;
85 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
90 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
94 *ofs = (pa - p->p_paddr) + p->p_offset;
95 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
99 _i386_freevtop(kvm_t *kd)
101 struct vmstate *vm = kd->vmst;
111 _i386_probe(kvm_t *kd)
114 return (_kvm_probe_elf_kernel(kd, ELFCLASS32, EM_386) &&
115 !_kvm_is_minidump(kd));
119 _i386_initvtop(kvm_t *kd)
121 struct kvm_nlist nl[2];
127 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(struct vmstate));
128 if (kd->vmst == NULL) {
129 _kvm_err(kd, kd->program, "cannot allocate vm");
134 if (kd->rawdump == 0) {
135 if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
136 &kd->vmst->phdr) == -1)
140 nl[0].n_name = "kernbase";
143 if (kvm_nlist2(kd, nl) != 0) {
145 kernbase = KERNBASE; /* for old kernels */
147 _kvm_err(kd, kd->program, "cannot resolve kernbase");
151 kernbase = nl[0].n_value;
153 nl[0].n_name = "IdlePDPT";
156 if (kvm_nlist2(kd, nl) == 0) {
157 i386_physaddr_pae_t pa64;
159 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
160 sizeof(pa)) != sizeof(pa)) {
161 _kvm_err(kd, kd->program, "cannot read IdlePDPT");
165 PTD = _kvm_malloc(kd, 4 * I386_PAGE_SIZE);
167 _kvm_err(kd, kd->program, "cannot allocate PTD");
170 for (i = 0; i < 4; i++) {
171 if (kvm_read2(kd, pa + (i * sizeof(pa64)), &pa64,
172 sizeof(pa64)) != sizeof(pa64)) {
173 _kvm_err(kd, kd->program, "Cannot read PDPT");
177 pa64 = le64toh(pa64);
178 if (kvm_read2(kd, pa64 & I386_PG_FRAME_PAE,
179 PTD + (i * I386_PAGE_SIZE), I386_PAGE_SIZE) !=
181 _kvm_err(kd, kd->program, "cannot read PDPT");
189 nl[0].n_name = "IdlePTD";
192 if (kvm_nlist2(kd, nl) != 0) {
193 _kvm_err(kd, kd->program, "bad namelist");
196 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
197 sizeof(pa)) != sizeof(pa)) {
198 _kvm_err(kd, kd->program, "cannot read IdlePTD");
202 PTD = _kvm_malloc(kd, I386_PAGE_SIZE);
204 _kvm_err(kd, kd->program, "cannot allocate PTD");
207 if (kvm_read2(kd, pa, PTD, I386_PAGE_SIZE) != I386_PAGE_SIZE) {
208 _kvm_err(kd, kd->program, "cannot read PTD");
218 _i386_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
221 i386_physaddr_t offset;
222 i386_physaddr_t pte_pa;
233 PTD = (i386_pde_t *)vm->PTD;
234 offset = va & I386_PAGE_MASK;
237 * If we are initializing (kernel page table descriptor pointer
238 * not yet set) then return pa == va to avoid infinite recursion.
241 s = _kvm_pa2off(kd, va, pa);
243 _kvm_err(kd, kd->program,
244 "_i386_vatop: bootstrap data not in dump");
247 return (I386_PAGE_SIZE - offset);
250 pdeindex = va >> I386_PDRSHIFT;
251 pde = le32toh(PTD[pdeindex]);
252 if ((pde & I386_PG_V) == 0) {
253 _kvm_err(kd, kd->program, "_i386_vatop: pde not valid");
257 if (pde & I386_PG_PS) {
259 * No second-level page table; ptd describes one 4MB
260 * page. (We assume that the kernel wouldn't set
261 * PG_PS without enabling it cr0).
263 offset = va & I386_PAGE_PS_MASK;
264 a = (pde & I386_PG_PS_FRAME) + offset;
265 s = _kvm_pa2off(kd, a, pa);
267 _kvm_err(kd, kd->program,
268 "_i386_vatop: 4MB page address not in dump");
271 return (I386_NBPDR - offset);
274 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG - 1);
275 pte_pa = (pde & I386_PG_FRAME) + (pteindex * sizeof(pte));
277 s = _kvm_pa2off(kd, pte_pa, &ofs);
278 if (s < sizeof(pte)) {
279 _kvm_err(kd, kd->program, "_i386_vatop: pte_pa not found");
283 /* XXX This has to be a physical address read, kvm_read is virtual */
284 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
285 _kvm_syserr(kd, kd->program, "_i386_vatop: pread");
289 if ((pte & I386_PG_V) == 0) {
290 _kvm_err(kd, kd->program, "_kvm_kvatop: pte not valid");
294 a = (pte & I386_PG_FRAME) + offset;
295 s = _kvm_pa2off(kd, a, pa);
297 _kvm_err(kd, kd->program, "_i386_vatop: address not in dump");
300 return (I386_PAGE_SIZE - offset);
303 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
308 _i386_vatop_pae(kvm_t *kd, kvaddr_t va, off_t *pa)
311 i386_physaddr_pae_t offset;
312 i386_physaddr_pae_t pte_pa;
318 i386_physaddr_pae_t a;
323 PTD = (i386_pde_pae_t *)vm->PTD;
324 offset = va & I386_PAGE_MASK;
327 * If we are initializing (kernel page table descriptor pointer
328 * not yet set) then return pa == va to avoid infinite recursion.
331 s = _kvm_pa2off(kd, va, pa);
333 _kvm_err(kd, kd->program,
334 "_i386_vatop_pae: bootstrap data not in dump");
337 return (I386_PAGE_SIZE - offset);
340 pdeindex = va >> I386_PDRSHIFT_PAE;
341 pde = le64toh(PTD[pdeindex]);
342 if ((pde & I386_PG_V) == 0) {
343 _kvm_err(kd, kd->program, "_kvm_kvatop_pae: pde not valid");
347 if (pde & I386_PG_PS) {
349 * No second-level page table; ptd describes one 2MB
350 * page. (We assume that the kernel wouldn't set
351 * PG_PS without enabling it cr0).
353 offset = va & I386_PAGE_PS_MASK_PAE;
354 a = (pde & I386_PG_PS_FRAME_PAE) + offset;
355 s = _kvm_pa2off(kd, a, pa);
357 _kvm_err(kd, kd->program,
358 "_i386_vatop: 2MB page address not in dump");
361 return (I386_NBPDR_PAE - offset);
364 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG_PAE - 1);
365 pte_pa = (pde & I386_PG_FRAME_PAE) + (pteindex * sizeof(pde));
367 s = _kvm_pa2off(kd, pte_pa, &ofs);
368 if (s < sizeof(pte)) {
369 _kvm_err(kd, kd->program, "_i386_vatop_pae: pdpe_pa not found");
373 /* XXX This has to be a physical address read, kvm_read is virtual */
374 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
375 _kvm_syserr(kd, kd->program, "_i386_vatop_pae: read");
379 if ((pte & I386_PG_V) == 0) {
380 _kvm_err(kd, kd->program, "_i386_vatop_pae: pte not valid");
384 a = (pte & I386_PG_FRAME_PAE) + offset;
385 s = _kvm_pa2off(kd, a, pa);
387 _kvm_err(kd, kd->program,
388 "_i386_vatop_pae: address not in dump");
391 return (I386_PAGE_SIZE - offset);
394 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
399 _i386_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
403 _kvm_err(kd, 0, "vatop called in live kernel!");
407 return (_i386_vatop_pae(kd, va, pa));
409 return (_i386_vatop(kd, va, pa));
413 _i386_native(kvm_t *kd __unused)
423 static struct kvm_arch kvm_i386 = {
424 .ka_probe = _i386_probe,
425 .ka_initvtop = _i386_initvtop,
426 .ka_freevtop = _i386_freevtop,
427 .ka_kvatop = _i386_kvatop,
428 .ka_native = _i386_native,