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>
59 #include <vm/vm_param.h>
61 #include <machine/elf.h>
65 #include "kvm_private.h"
68 #define btop(x) (amd64_btop(x))
69 #define ptob(x) (amd64_ptob(x))
72 /* minidump must be the first item! */
74 int minidump; /* 1 = minidump mode */
81 * Map the ELF headers into the process' address space. We do this in two
82 * steps: first the ELF header itself and using that information the whole
83 * set of headers. (Taken from kvm_ia64.c)
86 _kvm_maphdrs(kvm_t *kd, size_t sz)
88 struct vmstate *vm = kd->vmst;
90 /* munmap() previous mmap(). */
91 if (vm->mmapbase != NULL) {
92 munmap(vm->mmapbase, vm->mmapsize);
97 vm->mmapbase = mmap(NULL, sz, PROT_READ, MAP_PRIVATE, kd->pmfd, 0);
98 if (vm->mmapbase == MAP_FAILED) {
99 _kvm_err(kd, kd->program, "cannot mmap corefile");
106 * Translate a physical memory address to a file-offset in the crash-dump.
107 * (Taken from kvm_ia64.c)
110 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
112 Elf_Ehdr *e = kd->vmst->mmapbase;
113 Elf_Phdr *p = (Elf_Phdr*)((char*)e + e->e_phoff);
116 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
120 *ofs = (pa - p->p_paddr) + p->p_offset;
121 return (PAGE_SIZE - ((size_t)pa & PAGE_MASK));
125 _kvm_freevtop(kvm_t *kd)
127 struct vmstate *vm = kd->vmst;
129 if (kd->vmst->minidump)
130 return (_kvm_minidump_freevtop(kd));
131 if (vm->mmapbase != NULL)
132 munmap(vm->mmapbase, vm->mmapsize);
140 _kvm_initvtop(kvm_t *kd)
142 struct nlist nlist[2];
150 if (pread(kd->pmfd, &minihdr, 8, 0) == 8)
151 if (memcmp(&minihdr, "minidump", 8) == 0)
152 return (_kvm_minidump_initvtop(kd));
154 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
156 _kvm_err(kd, kd->program, "cannot allocate vm");
161 if (_kvm_maphdrs(kd, sizeof(Elf_Ehdr)) == -1)
164 ehdr = kd->vmst->mmapbase;
165 hdrsz = ehdr->e_phoff + ehdr->e_phentsize * ehdr->e_phnum;
166 if (_kvm_maphdrs(kd, hdrsz) == -1)
169 nlist[0].n_name = "kernbase";
172 if (kvm_nlist(kd, nlist) != 0) {
173 _kvm_err(kd, kd->program, "bad namelist - no kernbase");
176 kernbase = nlist[0].n_value;
178 nlist[0].n_name = "KPML4phys";
181 if (kvm_nlist(kd, nlist) != 0) {
182 _kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
185 if (kvm_read(kd, (nlist[0].n_value - kernbase), &pa, sizeof(pa)) !=
187 _kvm_err(kd, kd->program, "cannot read KPML4phys");
190 PML4 = _kvm_malloc(kd, PAGE_SIZE);
191 if (kvm_read(kd, pa, PML4, PAGE_SIZE) != PAGE_SIZE) {
192 _kvm_err(kd, kd->program, "cannot read KPML4phys");
195 kd->vmst->PML4 = PML4;
200 _kvm_vatop(kvm_t *kd, u_long va, off_t *pa)
221 offset = va & (PAGE_SIZE - 1);
224 * If we are initializing (kernel page table descriptor pointer
225 * not yet set) then return pa == va to avoid infinite recursion.
228 s = _kvm_pa2off(kd, va, pa);
230 _kvm_err(kd, kd->program,
231 "_kvm_vatop: bootstrap data not in dump");
234 return (PAGE_SIZE - offset);
237 pml4eindex = (va >> PML4SHIFT) & (NPML4EPG - 1);
238 pml4e = vm->PML4[pml4eindex];
239 if (((u_long)pml4e & PG_V) == 0) {
240 _kvm_err(kd, kd->program, "_kvm_vatop: pml4e not valid");
244 pdpeindex = (va >> PDPSHIFT) & (NPDPEPG-1);
245 pdpe_pa = ((u_long)pml4e & PG_FRAME) +
246 (pdpeindex * sizeof(pdp_entry_t));
248 s = _kvm_pa2off(kd, pdpe_pa, &ofs);
249 if (s < sizeof pdpe) {
250 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe_pa not found");
253 if (lseek(kd->pmfd, ofs, 0) == -1) {
254 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek pdpe_pa");
257 if (read(kd->pmfd, &pdpe, sizeof pdpe) != sizeof pdpe) {
258 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pdpe");
261 if (((u_long)pdpe & PG_V) == 0) {
262 _kvm_err(kd, kd->program, "_kvm_vatop: pdpe not valid");
266 pdeindex = (va >> PDRSHIFT) & (NPDEPG-1);
267 pde_pa = ((u_long)pdpe & PG_FRAME) + (pdeindex * sizeof(pd_entry_t));
269 s = _kvm_pa2off(kd, pde_pa, &ofs);
270 if (s < sizeof pde) {
271 _kvm_syserr(kd, kd->program, "_kvm_vatop: pde_pa not found");
274 if (lseek(kd->pmfd, ofs, 0) == -1) {
275 _kvm_err(kd, kd->program, "_kvm_vatop: lseek pde_pa");
278 if (read(kd->pmfd, &pde, sizeof pde) != sizeof pde) {
279 _kvm_syserr(kd, kd->program, "_kvm_vatop: read pde");
282 if (((u_long)pde & PG_V) == 0) {
283 _kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
287 if ((u_long)pde & PG_PS) {
289 * No final-level page table; ptd describes one 2MB page.
291 #define PAGE2M_MASK (NBPDR - 1)
292 #define PG_FRAME2M (~PAGE2M_MASK)
293 a = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
294 s = _kvm_pa2off(kd, a, pa);
296 _kvm_err(kd, kd->program,
297 "_kvm_vatop: 2MB page address not in dump");
300 return (NBPDR - (va & PAGE2M_MASK));
303 pteindex = (va >> PAGE_SHIFT) & (NPTEPG-1);
304 pte_pa = ((u_long)pde & PG_FRAME) + (pteindex * sizeof(pt_entry_t));
306 s = _kvm_pa2off(kd, pte_pa, &ofs);
307 if (s < sizeof pte) {
308 _kvm_err(kd, kd->program, "_kvm_vatop: pte_pa not found");
311 if (lseek(kd->pmfd, ofs, 0) == -1) {
312 _kvm_syserr(kd, kd->program, "_kvm_vatop: lseek");
315 if (read(kd->pmfd, &pte, sizeof pte) != sizeof pte) {
316 _kvm_syserr(kd, kd->program, "_kvm_vatop: read");
319 if (((u_long)pte & PG_V) == 0) {
320 _kvm_err(kd, kd->program, "_kvm_vatop: pte not valid");
324 a = ((u_long)pte & PG_FRAME) + offset;
325 s = _kvm_pa2off(kd, a, pa);
327 _kvm_err(kd, kd->program, "_kvm_vatop: address not in dump");
330 return (PAGE_SIZE - offset);
333 _kvm_err(kd, 0, "invalid address (0x%lx)", va);
338 _kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
341 if (kd->vmst->minidump)
342 return (_kvm_minidump_kvatop(kd, va, pa));
344 _kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
347 return (_kvm_vatop(kd, va, pa));