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 * AMD64 machine dependent routines for kvm. Hopefully, the forthcoming
45 * vm code will one day obsolete this module.
48 #include <sys/param.h>
60 #include <vm/vm_param.h>
62 #include <machine/elf.h>
66 #include "kvm_private.h"
69 #define btop(x) (amd64_btop(x))
70 #define ptob(x) (amd64_ptob(x))
73 /* minidump must be the first item! */
75 int minidump; /* 1 = minidump mode */
82 * Map the ELF headers into the process' address space. We do this in two
83 * steps: first the ELF header itself and using that information the whole
87 _kvm_maphdrs(kvm_t *kd, size_t sz)
89 struct vmstate *vm = kd->vmst;
91 /* munmap() previous mmap(). */
92 if (vm->mmapbase != NULL) {
93 munmap(vm->mmapbase, vm->mmapsize);
98 vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
99 if (vm->mmapbase == MAP_FAILED) {
100 _kvm_err(kd, kd->program, "cannot mmap corefile");
107 * Translate a physical memory address to a file-offset in the crash-dump.
110 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
112 Elf_Ehdr *e = kd->vmst->mmapbase;
118 return (PAGE_SIZE - ((size_t)pa & PAGE_MASK));
121 p = (Elf_Phdr*)((char*)e + e->e_phoff);
123 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
127 *ofs = (pa - p->p_paddr) + p->p_offset;
128 return (PAGE_SIZE - ((size_t)pa & PAGE_MASK));
132 _kvm_freevtop(kvm_t *kd)
134 struct vmstate *vm = kd->vmst;
136 if (kd->vmst->minidump)
137 return (_kvm_minidump_freevtop(kd));
138 if (vm->mmapbase != NULL)
139 munmap(vm->mmapbase, vm->mmapsize);
147 _kvm_initvtop(kvm_t *kd)
157 if (!kd->rawdump && pread(kd->pmfd, &minihdr, 8, 0) == 8)
158 if (memcmp(&minihdr, "minidump", 8) == 0)
159 return (_kvm_minidump_initvtop(kd));
161 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
163 _kvm_err(kd, kd->program, "cannot allocate vm");
168 if (kd->rawdump == 0) {
169 if (_kvm_maphdrs(kd, sizeof(Elf_Ehdr)) == -1)
172 ehdr = kd->vmst->mmapbase;
173 hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
174 if (_kvm_maphdrs(kd, hdrsz) == -1)
178 nl[0].n_name = "kernbase";
181 if (kvm_nlist(kd, nl) != 0) {
182 _kvm_err(kd, kd->program, "bad namelist - no kernbase");
185 kernbase = nl[0].n_value;
187 nl[0].n_name = "KPML4phys";
190 if (kvm_nlist(kd, nl) != 0) {
191 _kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
194 if (kvm_read(kd, (nl[0].n_value - kernbase), &pa, sizeof(pa)) !=
196 _kvm_err(kd, kd->program, "cannot read KPML4phys");
199 PML4 = _kvm_malloc(kd, PAGE_SIZE);
200 if (kvm_read(kd, pa, PML4, PAGE_SIZE) != PAGE_SIZE) {
201 _kvm_err(kd, kd->program, "cannot read KPML4phys");
204 kd->vmst->PML4 = PML4;
209 _kvm_vatop(kvm_t *kd, u_long va, off_t *pa)
229 offset = va & (PAGE_SIZE - 1);
232 * If we are initializing (kernel page table descriptor pointer
233 * not yet set) then return pa == va to avoid infinite recursion.
236 s = _kvm_pa2off(kd, va, pa);
238 _kvm_err(kd, kd->program,
239 "_kvm_vatop: bootstrap data not in dump");
242 return (PAGE_SIZE - offset);
245 pml4eindex = (va >> PML4SHIFT) & (NPML4EPG - 1);
246 pml4e = vm->PML4[pml4eindex];
247 if (((u_long)pml4e & PG_V) == 0) {
248 _kvm_err(kd, kd->program, "_kvm_vatop: pml4e not valid");
252 pdpeindex = (va >> PDPSHIFT) & (NPDPEPG-1);
253 pdpe_pa = ((u_long)pml4e & PG_FRAME) +
254 (pdpeindex * sizeof(pdp_entry_t));
256 s = _kvm_pa2off(kd, pdpe_pa, &ofs);
257 if (s < sizeof pdpe) {
258 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe_pa not found");
261 if (lseek(kd->pmfd, ofs, 0) == -1) {
262 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek pdpe_pa");
265 if (read(kd->pmfd, &pdpe, sizeof pdpe) != sizeof pdpe) {
266 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pdpe");
269 if (((u_long)pdpe & PG_V) == 0) {
270 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe not valid");
274 pdeindex = (va >> PDRSHIFT) & (NPDEPG-1);
275 pde_pa = ((u_long)pdpe & PG_FRAME) + (pdeindex * sizeof(pd_entry_t));
277 s = _kvm_pa2off(kd, pde_pa, &ofs);
278 if (s < sizeof pde) {
279 _kvm_syserr(kd, kd->program, "_kvm_vatop: pde_pa not found");
282 if (lseek(kd->pmfd, ofs, 0) == -1) {
283 _kvm_err(kd, kd->program, "_kvm_vatop: lseek pde_pa");
286 if (read(kd->pmfd, &pde, sizeof pde) != sizeof pde) {
287 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pde");
290 if (((u_long)pde & PG_V) == 0) {
291 _kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
295 if ((u_long)pde & PG_PS) {
297 * No final-level page table; ptd describes one 2MB page.
299 #define PAGE2M_MASK (NBPDR - 1)
300 #define PG_FRAME2M (~PAGE2M_MASK)
301 a = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
302 s = _kvm_pa2off(kd, a, pa);
304 _kvm_err(kd, kd->program,
305 "_kvm_vatop: 2MB page address not in dump");
308 return (NBPDR - (va & PAGE2M_MASK));
311 pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
312 pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
314 s = _kvm_pa2off(kd, pte_pa, &ofs);
315 if (s < sizeof pte) {
316 _kvm_err(kd, kd->program, "_kvm_vatop: pte_pa not found");
319 if (lseek(kd->pmfd, ofs, 0) == -1) {
320 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
323 if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
324 _kvm_syserr(kd, kd->program, "_kvm_vatop: read");
327 if (((u_long)pte & PG_V) == 0) {
328 _kvm_err(kd, kd->program, "_kvm_vatop: pte not valid");
332 a = ((u_long)pte & PG_FRAME) + offset;
333 s = _kvm_pa2off(kd, a, pa);
335 _kvm_err(kd, kd->program, "_kvm_vatop: address not in dump");
338 return (PAGE_SIZE - offset);
341 _kvm_err(kd, 0, "invalid address (0x%lx)", va);
346 _kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
349 if (kd->vmst->minidump)
350 return (_kvm_minidump_kvatop(kd, va, pa));
352 _kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
355 return (_kvm_vatop(kd, va, pa));