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
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30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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 * AMD64 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) (amd64_btop(x))
73 #define ptob(x) (amd64_ptob(x))
83 * Map the ELF headers into the process' address space. We do this in two
84 * steps: first the ELF header itself and using that information the whole
85 * set of headers. (Taken from kvm_ia64.c)
88 _kvm_maphdrs(kvm_t *kd, size_t sz)
90 struct vmstate *vm = kd->vmst;
92 /* munmap() previous mmap(). */
93 if (vm->mmapbase != NULL) {
94 munmap(vm->mmapbase, vm->mmapsize);
99 vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
100 if (vm->mmapbase == MAP_FAILED) {
101 _kvm_err(kd, kd->program, "cannot mmap corefile");
108 * Translate a physical memory address to a file-offset in the crash-dump.
109 * (Taken from kvm_ia64.c)
112 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
114 Elf_Ehdr *e = kd->vmst->mmapbase;
115 Elf_Phdr *p = (Elf_Phdr*)((char*)e + e->e_phoff);
118 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
122 *ofs = (pa - p->p_paddr) + p->p_offset;
123 return (PAGE_SIZE - ((size_t)pa & PAGE_MASK));
127 _kvm_freevtop(kvm_t *kd)
129 struct vmstate *vm = kd->vmst;
131 if (vm->mmapbase != NULL)
132 munmap(vm->mmapbase, vm->mmapsize);
140 _kvm_initvtop(kvm_t *kd)
142 struct nlist nlist[2];
149 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
151 _kvm_err(kd, kd->program, "cannot allocate vm");
156 if (_kvm_maphdrs(kd, sizeof(Elf_Ehdr)) == -1)
159 ehdr = kd->vmst->mmapbase;
160 hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
161 if (_kvm_maphdrs(kd, hdrsz) == -1)
164 nlist[0].n_name = "kernbase";
167 if (kvm_nlist(kd, nlist) != 0) {
168 _kvm_err(kd, kd->program, "bad namelist - no kernbase");
171 kernbase = nlist[0].n_value;
173 nlist[0].n_name = "KPML4phys";
176 if (kvm_nlist(kd, nlist) != 0) {
177 _kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
180 if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa, sizeof(pa)) !=
182 _kvm_err(kd, kd->program, "cannot read KPML4phys");
185 PML4 = _kvm_malloc(kd, PAGE_SIZE);
186 if (kvm_read(kd, pa, PML4, PAGE_SIZE) != PAGE_SIZE) {
187 _kvm_err(kd, kd->program, "cannot read KPML4phys");
190 kd->vmst->PML4 = PML4;
195 _kvm_vatop(kvm_t *kd, u_long va, off_t *pa)
216 offset = va & (PAGE_SIZE - 1);
219 * If we are initializing (kernel page table descriptor pointer
220 * not yet set) then return pa == va to avoid infinite recursion.
223 s = _kvm_pa2off(kd, va, pa);
225 _kvm_err(kd, kd->program,
226 "_kvm_vatop: bootstrap data not in dump");
229 return (PAGE_SIZE - offset);
232 pml4eindex = (va >> PML4SHIFT) & (NPML4EPG - 1);
233 pml4e = vm->PML4[pml4eindex];
234 if (((u_long)pml4e & PG_V) == 0) {
235 _kvm_err(kd, kd->program, "_kvm_vatop: pml4e not valid");
239 pdpeindex = (va >> PDPSHIFT) & (NPDPEPG-1);
240 pdpe_pa = ((u_long)pml4e & PG_FRAME) +
241 (pdpeindex * sizeof(pdp_entry_t));
243 s = _kvm_pa2off(kd, pdpe_pa, &ofs);
244 if (s < sizeof pdpe) {
245 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe_pa not found");
248 if (lseek(kd->pmfd, ofs, 0) == -1) {
249 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek pdpe_pa");
252 if (read(kd->pmfd, &pdpe, sizeof pdpe) != sizeof pdpe) {
253 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pdpe");
256 if (((u_long)pdpe & PG_V) == 0) {
257 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe not valid");
261 pdeindex = (va >> PDRSHIFT) & (NPDEPG-1);
262 pde_pa = ((u_long)pdpe & PG_FRAME) + (pdeindex * sizeof(pd_entry_t));
264 s = _kvm_pa2off(kd, pde_pa, &ofs);
265 if (s < sizeof pde) {
266 _kvm_syserr(kd, kd->program, "_kvm_vatop: pde_pa not found");
269 if (lseek(kd->pmfd, ofs, 0) == -1) {
270 _kvm_err(kd, kd->program, "_kvm_vatop: lseek pde_pa");
273 if (read(kd->pmfd, &pde, sizeof pde) != sizeof pde) {
274 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pde");
277 if (((u_long)pde & PG_V) == 0) {
278 _kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
282 if ((u_long)pde & PG_PS) {
284 * No final-level page table; ptd describes one 2MB page.
286 #define PAGE2M_MASK (NBPDR - 1)
287 #define PG_FRAME2M (~PAGE2M_MASK)
288 a = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
289 s = _kvm_pa2off(kd, a, pa);
291 _kvm_err(kd, kd->program,
292 "_kvm_vatop: 2MB page address not in dump");
295 return (NBPDR - (va & PAGE2M_MASK));
298 pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
299 pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
301 s = _kvm_pa2off(kd, pte_pa, &ofs);
302 if (s < sizeof pte) {
303 _kvm_err(kd, kd->program, "_kvm_vatop: pte_pa not found");
306 if (lseek(kd->pmfd, ofs, 0) == -1) {
307 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
310 if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
311 _kvm_syserr(kd, kd->program, "_kvm_vatop: read");
314 if (((u_long)pte & PG_V) == 0) {
315 _kvm_err(kd, kd->program, "_kvm_vatop: pte not valid");
319 a = ((u_long)pte & PG_FRAME) + offset;
320 s = _kvm_pa2off(kd, a, pa);
322 _kvm_err(kd, kd->program, "_kvm_vatop: address not in dump");
325 return (PAGE_SIZE - offset);
328 _kvm_err(kd, 0, "invalid address (0x%lx)", va);
333 _kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
337 _kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
340 return (_kvm_vatop(kd, va, pa));