1994-05-28 04:34:59 +00:00
|
|
|
/*-
|
|
|
|
* Copyright (c) 1989, 1992, 1993
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|
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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|
|
* 1. Redistributions of source code must retain the above copyright
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|
|
* notice, this list of conditions and the following disclaimer.
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|
* 2. Redistributions in binary form must reproduce the above copyright
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|
|
* notice, this list of conditions and the following disclaimer in the
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|
|
* documentation and/or other materials provided with the distribution.
|
2017-02-28 23:42:47 +00:00
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* 3. Neither the name of the University nor the names of its contributors
|
1994-05-28 04:34:59 +00:00
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2001-09-16 21:35:07 +00:00
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#include <sys/cdefs.h>
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|
|
__FBSDID("$FreeBSD$");
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|
|
1994-05-28 04:34:59 +00:00
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|
#if defined(LIBC_SCCS) && !defined(lint)
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1999-12-27 07:14:58 +00:00
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|
#if 0
|
1994-05-28 04:34:59 +00:00
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|
static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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1999-12-27 07:14:58 +00:00
|
|
|
#endif
|
1994-05-28 04:34:59 +00:00
|
|
|
#endif /* LIBC_SCCS and not lint */
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|
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|
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|
|
/*
|
2003-04-30 21:05:33 +00:00
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|
|
* AMD64 machine dependent routines for kvm. Hopefully, the forthcoming
|
1994-05-28 04:34:59 +00:00
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|
* vm code will one day obsolete this module.
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*/
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|
|
#include <sys/param.h>
|
2015-11-27 18:58:26 +00:00
|
|
|
#include <sys/endian.h>
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|
|
|
#include <stdint.h>
|
1996-07-12 18:57:58 +00:00
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|
|
#include <stdlib.h>
|
2009-06-14 12:42:06 +00:00
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|
|
#include <string.h>
|
1994-05-28 04:34:59 +00:00
|
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|
#include <unistd.h>
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|
|
#include <kvm.h>
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|
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|
|
#include <limits.h>
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|
|
#include "kvm_private.h"
|
2015-11-27 18:58:26 +00:00
|
|
|
#include "kvm_amd64.h"
|
1994-05-28 04:34:59 +00:00
|
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|
|
struct vmstate {
|
2015-11-27 18:58:26 +00:00
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|
|
size_t phnum;
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|
|
GElf_Phdr *phdr;
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|
|
amd64_pml4e_t *PML4;
|
1994-05-28 04:34:59 +00:00
|
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|
};
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|
2005-06-29 22:39:41 +00:00
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|
|
/*
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|
|
* Translate a physical memory address to a file-offset in the crash-dump.
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|
|
*/
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|
|
static size_t
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|
|
_kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
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|
|
|
{
|
2015-11-27 18:58:26 +00:00
|
|
|
struct vmstate *vm = kd->vmst;
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|
|
|
GElf_Phdr *p;
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|
|
size_t n;
|
2005-06-29 22:39:41 +00:00
|
|
|
|
2007-06-15 11:35:11 +00:00
|
|
|
if (kd->rawdump) {
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|
|
|
*ofs = pa;
|
2015-11-27 18:58:26 +00:00
|
|
|
return (AMD64_PAGE_SIZE - (pa & AMD64_PAGE_MASK));
|
2007-06-15 11:35:11 +00:00
|
|
|
}
|
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|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
p = vm->phdr;
|
|
|
|
n = vm->phnum;
|
2005-06-29 22:39:41 +00:00
|
|
|
while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
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|
|
|
p++, n--;
|
|
|
|
if (n == 0)
|
|
|
|
return (0);
|
|
|
|
*ofs = (pa - p->p_paddr) + p->p_offset;
|
2015-11-27 18:58:26 +00:00
|
|
|
return (AMD64_PAGE_SIZE - (pa & AMD64_PAGE_MASK));
|
2005-06-29 22:39:41 +00:00
|
|
|
}
|
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
static void
|
|
|
|
_amd64_freevtop(kvm_t *kd)
|
1996-10-07 20:17:50 +00:00
|
|
|
{
|
2005-06-29 22:39:41 +00:00
|
|
|
struct vmstate *vm = kd->vmst;
|
|
|
|
|
|
|
|
if (vm->PML4)
|
|
|
|
free(vm->PML4);
|
2015-11-27 18:58:26 +00:00
|
|
|
free(vm->phdr);
|
2005-06-29 22:39:41 +00:00
|
|
|
free(vm);
|
|
|
|
kd->vmst = NULL;
|
1994-05-28 04:34:59 +00:00
|
|
|
}
|
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
static int
|
|
|
|
_amd64_probe(kvm_t *kd)
|
|
|
|
{
|
|
|
|
|
|
|
|
return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_X86_64) &&
|
|
|
|
!_kvm_is_minidump(kd));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
_amd64_initvtop(kvm_t *kd)
|
1996-10-07 20:17:50 +00:00
|
|
|
{
|
2015-11-27 18:58:26 +00:00
|
|
|
struct kvm_nlist nl[2];
|
|
|
|
amd64_physaddr_t pa;
|
|
|
|
kvaddr_t kernbase;
|
|
|
|
amd64_pml4e_t *PML4;
|
1994-05-28 04:34:59 +00:00
|
|
|
|
2005-06-29 22:39:41 +00:00
|
|
|
kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(*kd->vmst));
|
2016-04-22 18:05:34 +00:00
|
|
|
if (kd->vmst == NULL) {
|
1994-05-28 05:48:30 +00:00
|
|
|
_kvm_err(kd, kd->program, "cannot allocate vm");
|
1994-05-28 04:34:59 +00:00
|
|
|
return (-1);
|
1994-05-28 05:48:30 +00:00
|
|
|
}
|
2005-06-29 22:39:41 +00:00
|
|
|
kd->vmst->PML4 = 0;
|
|
|
|
|
2007-06-15 11:35:11 +00:00
|
|
|
if (kd->rawdump == 0) {
|
2015-11-27 18:58:26 +00:00
|
|
|
if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
|
|
|
|
&kd->vmst->phdr) == -1)
|
2007-06-15 11:35:11 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
1994-05-28 04:34:59 +00:00
|
|
|
|
2011-01-23 11:08:28 +00:00
|
|
|
nl[0].n_name = "kernbase";
|
|
|
|
nl[1].n_name = 0;
|
2001-08-24 08:53:30 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
if (kvm_nlist2(kd, nl) != 0) {
|
2004-05-19 18:24:13 +00:00
|
|
|
_kvm_err(kd, kd->program, "bad namelist - no kernbase");
|
|
|
|
return (-1);
|
|
|
|
}
|
2011-01-23 11:08:28 +00:00
|
|
|
kernbase = nl[0].n_value;
|
2001-08-24 08:53:30 +00:00
|
|
|
|
2011-01-23 11:08:28 +00:00
|
|
|
nl[0].n_name = "KPML4phys";
|
|
|
|
nl[1].n_name = 0;
|
1994-05-28 04:34:59 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
if (kvm_nlist2(kd, nl) != 0) {
|
2004-05-19 18:24:13 +00:00
|
|
|
_kvm_err(kd, kd->program, "bad namelist - no KPML4phys");
|
1994-05-28 04:34:59 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa, sizeof(pa)) !=
|
2001-08-24 08:53:30 +00:00
|
|
|
sizeof(pa)) {
|
2004-05-19 18:24:13 +00:00
|
|
|
_kvm_err(kd, kd->program, "cannot read KPML4phys");
|
1994-05-28 04:34:59 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
pa = le64toh(pa);
|
|
|
|
PML4 = _kvm_malloc(kd, AMD64_PAGE_SIZE);
|
2016-04-22 18:05:34 +00:00
|
|
|
if (PML4 == NULL) {
|
|
|
|
_kvm_err(kd, kd->program, "cannot allocate PML4");
|
|
|
|
return (-1);
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if (kvm_read2(kd, pa, PML4, AMD64_PAGE_SIZE) != AMD64_PAGE_SIZE) {
|
2004-05-19 18:24:13 +00:00
|
|
|
_kvm_err(kd, kd->program, "cannot read KPML4phys");
|
2016-04-30 09:32:19 +00:00
|
|
|
free(PML4);
|
1994-05-28 04:34:59 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
2005-06-29 22:39:41 +00:00
|
|
|
kd->vmst->PML4 = PML4;
|
1994-05-28 04:34:59 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2015-11-27 18:58:26 +00:00
|
|
|
_amd64_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
|
1996-10-07 20:17:50 +00:00
|
|
|
{
|
|
|
|
struct vmstate *vm;
|
2015-11-27 18:58:26 +00:00
|
|
|
amd64_physaddr_t offset;
|
|
|
|
amd64_physaddr_t pdpe_pa;
|
|
|
|
amd64_physaddr_t pde_pa;
|
|
|
|
amd64_physaddr_t pte_pa;
|
|
|
|
amd64_pml4e_t pml4e;
|
|
|
|
amd64_pdpe_t pdpe;
|
|
|
|
amd64_pde_t pde;
|
|
|
|
amd64_pte_t pte;
|
|
|
|
kvaddr_t pml4eindex;
|
|
|
|
kvaddr_t pdpeindex;
|
|
|
|
kvaddr_t pdeindex;
|
|
|
|
kvaddr_t pteindex;
|
|
|
|
amd64_physaddr_t a;
|
2005-06-29 22:39:41 +00:00
|
|
|
off_t ofs;
|
|
|
|
size_t s;
|
1996-10-07 20:17:50 +00:00
|
|
|
|
|
|
|
vm = kd->vmst;
|
2015-11-27 18:58:26 +00:00
|
|
|
offset = va & AMD64_PAGE_MASK;
|
1996-10-07 20:17:50 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* If we are initializing (kernel page table descriptor pointer
|
|
|
|
* not yet set) then return pa == va to avoid infinite recursion.
|
|
|
|
*/
|
2016-04-22 18:05:34 +00:00
|
|
|
if (vm->PML4 == NULL) {
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, va, pa);
|
|
|
|
if (s == 0) {
|
|
|
|
_kvm_err(kd, kd->program,
|
2015-11-27 18:58:26 +00:00
|
|
|
"_amd64_vatop: bootstrap data not in dump");
|
2005-06-29 22:39:41 +00:00
|
|
|
goto invalid;
|
|
|
|
} else
|
2015-11-27 18:58:26 +00:00
|
|
|
return (AMD64_PAGE_SIZE - offset);
|
1996-10-07 20:17:50 +00:00
|
|
|
}
|
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
pml4eindex = (va >> AMD64_PML4SHIFT) & (AMD64_NPML4EPG - 1);
|
|
|
|
pml4e = le64toh(vm->PML4[pml4eindex]);
|
|
|
|
if ((pml4e & AMD64_PG_V) == 0) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pml4e not valid");
|
2004-05-19 18:24:13 +00:00
|
|
|
goto invalid;
|
2005-06-29 22:39:41 +00:00
|
|
|
}
|
2004-05-19 18:24:13 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
pdpeindex = (va >> AMD64_PDPSHIFT) & (AMD64_NPDPEPG - 1);
|
|
|
|
pdpe_pa = (pml4e & AMD64_PG_FRAME) + (pdpeindex * sizeof(amd64_pdpe_t));
|
2004-05-19 18:24:13 +00:00
|
|
|
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, pdpe_pa, &ofs);
|
2015-11-27 18:58:26 +00:00
|
|
|
if (s < sizeof(pdpe)) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pdpe_pa not found");
|
2005-06-29 22:39:41 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if (pread(kd->pmfd, &pdpe, sizeof(pdpe), ofs) != sizeof(pdpe)) {
|
|
|
|
_kvm_syserr(kd, kd->program, "_amd64_vatop: read pdpe");
|
2004-05-19 18:24:13 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
pdpe = le64toh(pdpe);
|
|
|
|
if ((pdpe & AMD64_PG_V) == 0) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pdpe not valid");
|
2004-05-19 18:24:13 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
|
|
|
|
if (pdpe & AMD64_PG_PS) {
|
|
|
|
/*
|
|
|
|
* No next-level page table; pdpe describes one 1GB page.
|
|
|
|
*/
|
2016-03-28 18:41:48 +00:00
|
|
|
a = (pdpe & AMD64_PG_1GB_FRAME) + (va & AMD64_PDPMASK);
|
2015-11-27 18:58:26 +00:00
|
|
|
s = _kvm_pa2off(kd, a, pa);
|
|
|
|
if (s == 0) {
|
|
|
|
_kvm_err(kd, kd->program,
|
|
|
|
"_amd64_vatop: 1GB page address not in dump");
|
|
|
|
goto invalid;
|
|
|
|
} else
|
|
|
|
return (AMD64_NBPDP - (va & AMD64_PDPMASK));
|
2005-06-29 22:39:41 +00:00
|
|
|
}
|
2004-05-19 18:24:13 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
pdeindex = (va >> AMD64_PDRSHIFT) & (AMD64_NPDEPG - 1);
|
|
|
|
pde_pa = (pdpe & AMD64_PG_FRAME) + (pdeindex * sizeof(amd64_pde_t));
|
2004-05-19 18:24:13 +00:00
|
|
|
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, pde_pa, &ofs);
|
2015-11-27 18:58:26 +00:00
|
|
|
if (s < sizeof(pde)) {
|
|
|
|
_kvm_syserr(kd, kd->program, "_amd64_vatop: pde_pa not found");
|
2004-05-19 18:24:13 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if (pread(kd->pmfd, &pde, sizeof(pde), ofs) != sizeof(pde)) {
|
|
|
|
_kvm_syserr(kd, kd->program, "_amd64_vatop: read pde");
|
2004-05-19 18:24:13 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
pde = le64toh(pde);
|
|
|
|
if ((pde & AMD64_PG_V) == 0) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pde not valid");
|
1996-10-07 20:17:50 +00:00
|
|
|
goto invalid;
|
2005-06-29 22:39:41 +00:00
|
|
|
}
|
1996-10-07 20:17:50 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
if (pde & AMD64_PG_PS) {
|
|
|
|
/*
|
|
|
|
* No final-level page table; pde describes one 2MB page.
|
|
|
|
*/
|
|
|
|
a = (pde & AMD64_PG_PS_FRAME) + (va & AMD64_PDRMASK);
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, a, pa);
|
|
|
|
if (s == 0) {
|
|
|
|
_kvm_err(kd, kd->program,
|
2015-11-27 18:58:26 +00:00
|
|
|
"_amd64_vatop: 2MB page address not in dump");
|
2005-06-29 22:39:41 +00:00
|
|
|
goto invalid;
|
|
|
|
} else
|
2015-11-27 18:58:26 +00:00
|
|
|
return (AMD64_NBPDR - (va & AMD64_PDRMASK));
|
1997-08-17 17:42:59 +00:00
|
|
|
}
|
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
pteindex = (va >> AMD64_PAGE_SHIFT) & (AMD64_NPTEPG - 1);
|
|
|
|
pte_pa = (pde & AMD64_PG_FRAME) + (pteindex * sizeof(amd64_pte_t));
|
1996-10-07 20:17:50 +00:00
|
|
|
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, pte_pa, &ofs);
|
2015-11-27 18:58:26 +00:00
|
|
|
if (s < sizeof(pte)) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pte_pa not found");
|
1996-10-07 20:17:50 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
|
|
|
|
_kvm_syserr(kd, kd->program, "_amd64_vatop: read");
|
1996-10-07 20:17:50 +00:00
|
|
|
goto invalid;
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
if ((pte & AMD64_PG_V) == 0) {
|
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: pte not valid");
|
1996-10-07 20:17:50 +00:00
|
|
|
goto invalid;
|
2005-06-29 22:39:41 +00:00
|
|
|
}
|
1996-10-07 20:17:50 +00:00
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
a = (pte & AMD64_PG_FRAME) + offset;
|
2005-06-29 22:39:41 +00:00
|
|
|
s = _kvm_pa2off(kd, a, pa);
|
|
|
|
if (s == 0) {
|
2015-11-27 18:58:26 +00:00
|
|
|
_kvm_err(kd, kd->program, "_amd64_vatop: address not in dump");
|
2005-06-29 22:39:41 +00:00
|
|
|
goto invalid;
|
|
|
|
} else
|
2015-11-27 18:58:26 +00:00
|
|
|
return (AMD64_PAGE_SIZE - offset);
|
1996-10-07 20:17:50 +00:00
|
|
|
|
|
|
|
invalid:
|
2015-11-27 18:58:26 +00:00
|
|
|
_kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
|
1996-10-07 20:17:50 +00:00
|
|
|
return (0);
|
1994-05-28 04:34:59 +00:00
|
|
|
}
|
|
|
|
|
2015-11-27 18:58:26 +00:00
|
|
|
static int
|
|
|
|
_amd64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
|
1996-10-07 20:17:50 +00:00
|
|
|
{
|
2005-06-29 22:39:41 +00:00
|
|
|
|
|
|
|
if (ISALIVE(kd)) {
|
|
|
|
_kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
|
|
|
|
return (0);
|
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
return (_amd64_vatop(kd, va, pa));
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
_amd64_native(kvm_t *kd)
|
|
|
|
{
|
|
|
|
|
|
|
|
#ifdef __amd64__
|
|
|
|
return (1);
|
|
|
|
#else
|
|
|
|
return (0);
|
|
|
|
#endif
|
1994-05-28 04:34:59 +00:00
|
|
|
}
|
2015-11-27 18:58:26 +00:00
|
|
|
|
|
|
|
struct kvm_arch kvm_amd64 = {
|
|
|
|
.ka_probe = _amd64_probe,
|
|
|
|
.ka_initvtop = _amd64_initvtop,
|
|
|
|
.ka_freevtop = _amd64_freevtop,
|
|
|
|
.ka_kvatop = _amd64_kvatop,
|
|
|
|
.ka_native = _amd64_native,
|
|
|
|
};
|
|
|
|
|
|
|
|
KVM_ARCH(kvm_amd64);
|