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
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
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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>
57 #include <machine/vmparam.h> /* For KERNBASE. */
62 #include "kvm_private.h"
73 * Translate a physical memory address to a file-offset in the crash-dump.
76 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
78 struct vmstate *vm = kd->vmst;
84 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
89 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
93 *ofs = (pa - p->p_paddr) + p->p_offset;
94 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
98 _i386_freevtop(kvm_t *kd)
100 struct vmstate *vm = kd->vmst;
110 _i386_probe(kvm_t *kd)
113 return (_kvm_probe_elf_kernel(kd, ELFCLASS32, EM_386) &&
114 !_kvm_is_minidump(kd));
118 _i386_initvtop(kvm_t *kd)
120 struct kvm_nlist nl[2];
126 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(struct vmstate));
127 if (kd->vmst == NULL) {
128 _kvm_err(kd, kd->program, "cannot allocate vm");
133 if (kd->rawdump == 0) {
134 if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
135 &kd->vmst->phdr) == -1)
139 nl[0].n_name = "kernbase";
142 if (kvm_nlist2(kd, nl) != 0) {
144 kernbase = KERNBASE; /* for old kernels */
146 _kvm_err(kd, kd->program, "cannot resolve kernbase");
150 kernbase = nl[0].n_value;
152 nl[0].n_name = "IdlePDPT";
155 if (kvm_nlist2(kd, nl) == 0) {
156 i386_physaddr_pae_t pa64;
158 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
159 sizeof(pa)) != sizeof(pa)) {
160 _kvm_err(kd, kd->program, "cannot read IdlePDPT");
164 PTD = _kvm_malloc(kd, 4 * I386_PAGE_SIZE);
165 for (i = 0; i < 4; i++) {
166 if (kvm_read2(kd, pa + (i * sizeof(pa64)), &pa64,
167 sizeof(pa64)) != sizeof(pa64)) {
168 _kvm_err(kd, kd->program, "Cannot read PDPT");
172 pa64 = le64toh(pa64);
173 if (kvm_read2(kd, pa64 & I386_PG_FRAME_PAE,
174 PTD + (i * I386_PAGE_SIZE), I386_PAGE_SIZE) !=
176 _kvm_err(kd, kd->program, "cannot read PDPT");
184 nl[0].n_name = "IdlePTD";
187 if (kvm_nlist2(kd, nl) != 0) {
188 _kvm_err(kd, kd->program, "bad namelist");
191 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
192 sizeof(pa)) != sizeof(pa)) {
193 _kvm_err(kd, kd->program, "cannot read IdlePTD");
197 PTD = _kvm_malloc(kd, I386_PAGE_SIZE);
198 if (kvm_read2(kd, pa, PTD, I386_PAGE_SIZE) != I386_PAGE_SIZE) {
199 _kvm_err(kd, kd->program, "cannot read PTD");
209 _i386_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
212 i386_physaddr_t offset;
213 i386_physaddr_t pte_pa;
224 PTD = (i386_pde_t *)vm->PTD;
225 offset = va & I386_PAGE_MASK;
228 * If we are initializing (kernel page table descriptor pointer
229 * not yet set) then return pa == va to avoid infinite recursion.
232 s = _kvm_pa2off(kd, va, pa);
234 _kvm_err(kd, kd->program,
235 "_i386_vatop: bootstrap data not in dump");
238 return (I386_PAGE_SIZE - offset);
241 pdeindex = va >> I386_PDRSHIFT;
242 pde = le32toh(PTD[pdeindex]);
243 if ((pde & I386_PG_V) == 0) {
244 _kvm_err(kd, kd->program, "_i386_vatop: pde not valid");
248 if (pde & I386_PG_PS) {
250 * No second-level page table; ptd describes one 4MB
251 * page. (We assume that the kernel wouldn't set
252 * PG_PS without enabling it cr0).
254 offset = va & I386_PAGE_PS_MASK;
255 a = (pde & I386_PG_PS_FRAME) + offset;
256 s = _kvm_pa2off(kd, a, pa);
258 _kvm_err(kd, kd->program,
259 "_i386_vatop: 4MB page address not in dump");
262 return (I386_NBPDR - offset);
265 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG - 1);
266 pte_pa = (pde & I386_PG_FRAME) + (pteindex * sizeof(pte));
268 s = _kvm_pa2off(kd, pte_pa, &ofs);
269 if (s < sizeof(pte)) {
270 _kvm_err(kd, kd->program, "_i386_vatop: pte_pa not found");
274 /* XXX This has to be a physical address read, kvm_read is virtual */
275 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
276 _kvm_syserr(kd, kd->program, "_i386_vatop: pread");
280 if ((pte & I386_PG_V) == 0) {
281 _kvm_err(kd, kd->program, "_kvm_kvatop: pte not valid");
285 a = (pte & I386_PG_FRAME) + offset;
286 s = _kvm_pa2off(kd, a, pa);
288 _kvm_err(kd, kd->program, "_i386_vatop: address not in dump");
291 return (I386_PAGE_SIZE - offset);
294 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
299 _i386_vatop_pae(kvm_t *kd, kvaddr_t va, off_t *pa)
302 i386_physaddr_pae_t offset;
303 i386_physaddr_pae_t pte_pa;
309 i386_physaddr_pae_t a;
314 PTD = (i386_pde_pae_t *)vm->PTD;
315 offset = va & I386_PAGE_MASK;
318 * If we are initializing (kernel page table descriptor pointer
319 * not yet set) then return pa == va to avoid infinite recursion.
322 s = _kvm_pa2off(kd, va, pa);
324 _kvm_err(kd, kd->program,
325 "_i386_vatop_pae: bootstrap data not in dump");
328 return (I386_PAGE_SIZE - offset);
331 pdeindex = va >> I386_PDRSHIFT_PAE;
332 pde = le64toh(PTD[pdeindex]);
333 if ((pde & I386_PG_V) == 0) {
334 _kvm_err(kd, kd->program, "_kvm_kvatop_pae: pde not valid");
338 if (pde & I386_PG_PS) {
340 * No second-level page table; ptd describes one 2MB
341 * page. (We assume that the kernel wouldn't set
342 * PG_PS without enabling it cr0).
344 offset = va & I386_PAGE_PS_MASK_PAE;
345 a = (pde & I386_PG_PS_FRAME_PAE) + offset;
346 s = _kvm_pa2off(kd, a, pa);
348 _kvm_err(kd, kd->program,
349 "_i386_vatop: 2MB page address not in dump");
352 return (I386_NBPDR_PAE - offset);
355 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG_PAE - 1);
356 pte_pa = (pde & I386_PG_FRAME_PAE) + (pteindex * sizeof(pde));
358 s = _kvm_pa2off(kd, pte_pa, &ofs);
359 if (s < sizeof(pte)) {
360 _kvm_err(kd, kd->program, "_i386_vatop_pae: pdpe_pa not found");
364 /* XXX This has to be a physical address read, kvm_read is virtual */
365 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
366 _kvm_syserr(kd, kd->program, "_i386_vatop_pae: read");
370 if ((pte & I386_PG_V) == 0) {
371 _kvm_err(kd, kd->program, "_i386_vatop_pae: pte not valid");
375 a = (pte & I386_PG_FRAME_PAE) + offset;
376 s = _kvm_pa2off(kd, a, pa);
378 _kvm_err(kd, kd->program,
379 "_i386_vatop_pae: address not in dump");
382 return (I386_PAGE_SIZE - offset);
385 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
390 _i386_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
394 _kvm_err(kd, 0, "vatop called in live kernel!");
398 return (_i386_vatop_pae(kd, va, pa));
400 return (_i386_vatop(kd, va, pa));
404 _i386_native(kvm_t *kd)
414 struct kvm_arch kvm_i386 = {
415 .ka_probe = _i386_probe,
416 .ka_initvtop = _i386_initvtop,
417 .ka_freevtop = _i386_freevtop,
418 .ka_kvatop = _i386_kvatop,
419 .ka_native = _i386_native,