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. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #if defined(LIBC_SCCS) && !defined(lint)
43 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
45 #endif /* LIBC_SCCS and not lint */
48 * i386 machine dependent routines for kvm. Hopefully, the forthcoming
49 * vm code will one day obsolete this module.
52 #include <sys/param.h>
63 #include <vm/vm_param.h>
65 #include <machine/elf.h>
69 #include "kvm_private.h"
72 #define btop(x) (i386_btop(x))
73 #define ptob(x) (i386_ptob(x))
76 #define PG_FRAME_PAE (~((uint64_t)PAGE_MASK))
77 #define PDRSHIFT_PAE 21
78 #define NPTEPG_PAE (PAGE_SIZE/sizeof(uint64_t))
79 #define NBPDR_PAE (1<<PDRSHIFT_PAE)
89 * Map the ELF headers into the process' address space. We do this in two
90 * steps: first the ELF header itself and using that information the whole
91 * set of headers. (Taken from kvm_ia64.c)
94 _kvm_maphdrs(kvm_t *kd, size_t sz)
96 struct vmstate *vm = kd->vmst;
98 /* munmap() previous mmap(). */
99 if (vm->mmapbase != NULL) {
100 munmap(vm->mmapbase, vm->mmapsize);
105 vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
106 if (vm->mmapbase == MAP_FAILED) {
107 _kvm_err(kd, kd->program, "cannot mmap corefile");
114 * Translate a physical memory address to a file-offset in the crash-dump.
115 * (Taken from kvm_ia64.c)
118 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
120 Elf_Ehdr *e = kd->vmst->mmapbase;
121 Elf_Phdr *p = (Elf_Phdr*)((char*)e + e->e_phoff);
124 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
128 *ofs = (pa - p->p_paddr) + p->p_offset;
129 return (PAGE_SIZE - ((size_t)pa & PAGE_MASK));
133 _kvm_freevtop(kvm_t *kd)
135 struct vmstate *vm = kd->vmst;
137 if (vm->mmapbase != NULL)
138 munmap(vm->mmapbase, vm->mmapsize);
146 _kvm_initvtop(kvm_t *kd)
148 struct nlist nlist[2];
156 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
158 _kvm_err(kd, kd->program, "cannot allocate vm");
163 if (_kvm_maphdrs(kd, sizeof(Elf_Ehdr)) == -1)
166 ehdr = kd->vmst->mmapbase;
167 hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
168 if (_kvm_maphdrs(kd, hdrsz) == -1)
171 nlist[0].n_name = "kernbase";
174 if (kvm_nlist(kd, nlist) != 0)
175 kernbase = KERNBASE; /* for old kernels */
177 kernbase = nlist[0].n_value;
179 nlist[0].n_name = "IdlePDPT";
182 if (kvm_nlist(kd, nlist) == 0) {
185 if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa,
186 sizeof(pa)) != sizeof(pa)) {
187 _kvm_err(kd, kd->program, "cannot read IdlePDPT");
190 PTD = _kvm_malloc(kd, 4 * PAGE_SIZE);
191 for (i = 0; i < 4; i++) {
192 if (kvm_read(kd, pa + (i * sizeof(pa64)), &pa64,
193 sizeof(pa64)) != sizeof(pa64)) {
194 _kvm_err(kd, kd->program, "Cannot read PDPT");
198 if (kvm_read(kd, pa64 & PG_FRAME_PAE,
199 PTD + (i * PAGE_SIZE), PAGE_SIZE) != (PAGE_SIZE)) {
200 _kvm_err(kd, kd->program, "cannot read PDPT");
208 nlist[0].n_name = "IdlePTD";
211 if (kvm_nlist(kd, nlist) != 0) {
212 _kvm_err(kd, kd->program, "bad namelist");
215 if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa,
216 sizeof(pa)) != sizeof(pa)) {
217 _kvm_err(kd, kd->program, "cannot read IdlePTD");
220 PTD = _kvm_malloc(kd, PAGE_SIZE);
221 if (kvm_read(kd, pa, PTD, PAGE_SIZE) != PAGE_SIZE) {
222 _kvm_err(kd, kd->program, "cannot read PTD");
233 _kvm_vatop(kvm_t *kd, u_long va, off_t *pa)
249 PTD = (uint32_t *)vm->PTD;
250 offset = va & (PAGE_SIZE - 1);
253 * If we are initializing (kernel page table descriptor pointer
254 * not yet set) then return pa == va to avoid infinite recursion.
257 s = _kvm_pa2off(kd, va, pa);
259 _kvm_err(kd, kd->program,
260 "_kvm_vatop: bootstrap data not in dump");
263 return (PAGE_SIZE - offset);
266 pdeindex = va >> PDRSHIFT;
268 if (((u_long)pde & PG_V) == 0) {
269 _kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
273 if ((u_long)pde & PG_PS) {
275 * No second-level page table; ptd describes one 4MB page.
276 * (We assume that the kernel wouldn't set PG_PS without enabling
279 #define PAGE4M_MASK (NBPDR - 1)
280 #define PG_FRAME4M (~PAGE4M_MASK)
281 pde_pa = ((u_long)pde & PG_FRAME4M) + (va & PAGE4M_MASK);
282 s = _kvm_pa2off(kd, pde_pa, &ofs);
283 if (s < sizeof pde) {
284 _kvm_syserr(kd, kd->program,
285 "_kvm_vatop: pde_pa not found");
289 return (NBPDR - (va & PAGE4M_MASK));
292 pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
293 pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pde));
295 s = _kvm_pa2off(kd, pte_pa, &ofs);
296 if (s < sizeof pte) {
297 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe_pa not found");
301 /* XXX This has to be a physical address read, kvm_read is virtual */
302 if (lseek(kd->pmfd, ofs, 0) == -1) {
303 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
306 if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
307 _kvm_syserr(kd, kd->program, "_kvm_vatop: read");
310 if (((u_long)pte & PG_V) == 0) {
311 _kvm_err(kd, kd->program, "_kvm_kvatop: pte not valid");
315 a = ((u_long)pte & PG_FRAME) + offset;
316 s =_kvm_pa2off(kd, a, pa);
318 _kvm_err(kd, kd->program, "_kvm_vatop: address not in dump");
321 return (PAGE_SIZE - offset);
324 _kvm_err(kd, 0, "invalid address (0x%lx)", va);
329 _kvm_vatop_pae(kvm_t *kd, u_long va, off_t *pa)
345 PTD = (uint64_t *)vm->PTD;
346 offset = va & (PAGE_SIZE - 1);
349 * If we are initializing (kernel page table descriptor pointer
350 * not yet set) then return pa == va to avoid infinite recursion.
353 s = _kvm_pa2off(kd, va, pa);
355 _kvm_err(kd, kd->program,
356 "_kvm_vatop_pae: bootstrap data not in dump");
359 return (PAGE_SIZE - offset);
362 pdeindex = va >> PDRSHIFT_PAE;
364 if (((u_long)pde & PG_V) == 0) {
365 _kvm_err(kd, kd->program, "_kvm_kvatop_pae: pde not valid");
369 if ((u_long)pde & PG_PS) {
371 * No second-level page table; ptd describes one 2MB page.
372 * (We assume that the kernel wouldn't set PG_PS without enabling
375 #define PAGE2M_MASK (NBPDR_PAE - 1)
376 #define PG_FRAME2M (~PAGE2M_MASK)
377 pde_pa = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
378 s = _kvm_pa2off(kd, pde_pa, &ofs);
379 if (s < sizeof pde) {
380 _kvm_syserr(kd, kd->program,
381 "_kvm_vatop_pae: pde_pa not found");
385 return (NBPDR_PAE - (va & PAGE2M_MASK));
388 pteindex = (va >> PAGE_SHIFT) & (NPTEPG_PAE-1);
389 pte_pa = ((uint64_t)pde & PG_FRAME_PAE) + (pteindex * sizeof(pde));
391 s = _kvm_pa2off(kd, pte_pa, &ofs);
392 if (s < sizeof pte) {
393 _kvm_err(kd, kd->program, "_kvm_vatop_pae: pdpe_pa not found");
397 /* XXX This has to be a physical address read, kvm_read is virtual */
398 if (lseek(kd->pmfd, ofs, 0) == -1) {
399 _kvm_syserr(kd, kd->program, "_kvm_vatop_pae: lseek");
402 if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
403 _kvm_syserr(kd, kd->program, "_kvm_vatop_pae: read");
406 if (((uint64_t)pte & PG_V) == 0) {
407 _kvm_err(kd, kd->program, "_kvm_vatop_pae: pte not valid");
411 a = ((uint64_t)pte & PG_FRAME_PAE) + offset;
412 s =_kvm_pa2off(kd, a, pa);
414 _kvm_err(kd, kd->program,
415 "_kvm_vatop_pae: address not in dump");
418 return (PAGE_SIZE - offset);
421 _kvm_err(kd, 0, "invalid address (0x%lx)", va);
426 _kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
430 _kvm_err(kd, 0, "vatop called in live kernel!");
434 return (_kvm_vatop_pae(kd, va, pa));
436 return (_kvm_vatop(kd, va, pa));