8f1f0fd477
missing until it can be cleaned up. Reviewed by: jhb Approved by: ABT Systems Ltd Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3319
270 lines
6.7 KiB
C
270 lines
6.7 KiB
C
/*-
|
|
* Copyright (c) 2006 Peter Wemm
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* From: FreeBSD: src/lib/libkvm/kvm_minidump_amd64.c r261799
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* ARM64 (AArch64) machine dependent routines for kvm and minidumps.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/user.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/fnv_hash.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <nlist.h>
|
|
#include <kvm.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
|
|
#include <machine/elf.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <machine/pte.h>
|
|
#include <machine/minidump.h>
|
|
|
|
#include <limits.h>
|
|
#include <stdint.h>
|
|
|
|
#include "kvm_private.h"
|
|
|
|
struct hpte {
|
|
struct hpte *next;
|
|
vm_paddr_t pa;
|
|
int64_t off;
|
|
};
|
|
|
|
#define HPT_SIZE 1024
|
|
|
|
/* minidump must be the first item! */
|
|
struct vmstate {
|
|
int minidump; /* 1 = minidump mode */
|
|
struct minidumphdr hdr;
|
|
void *hpt_head[HPT_SIZE];
|
|
uint64_t *bitmap;
|
|
uint64_t *page_map;
|
|
};
|
|
|
|
static void
|
|
hpt_insert(kvm_t *kd, vm_paddr_t pa, int64_t off)
|
|
{
|
|
struct hpte *hpte;
|
|
uint32_t fnv = FNV1_32_INIT;
|
|
|
|
fnv = fnv_32_buf(&pa, sizeof(pa), fnv);
|
|
fnv &= (HPT_SIZE - 1);
|
|
hpte = malloc(sizeof(*hpte));
|
|
hpte->pa = pa;
|
|
hpte->off = off;
|
|
hpte->next = kd->vmst->hpt_head[fnv];
|
|
kd->vmst->hpt_head[fnv] = hpte;
|
|
}
|
|
|
|
static int64_t
|
|
hpt_find(kvm_t *kd, vm_paddr_t pa)
|
|
{
|
|
struct hpte *hpte;
|
|
uint32_t fnv = FNV1_32_INIT;
|
|
|
|
fnv = fnv_32_buf(&pa, sizeof(pa), fnv);
|
|
fnv &= (HPT_SIZE - 1);
|
|
for (hpte = kd->vmst->hpt_head[fnv]; hpte != NULL; hpte = hpte->next) {
|
|
if (pa == hpte->pa)
|
|
return (hpte->off);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
inithash(kvm_t *kd, uint64_t *base, int len, off_t off)
|
|
{
|
|
uint64_t idx;
|
|
uint64_t bit, bits;
|
|
vm_paddr_t pa;
|
|
|
|
for (idx = 0; idx < len / sizeof(*base); idx++) {
|
|
bits = base[idx];
|
|
while (bits) {
|
|
bit = ffsl(bits) - 1;
|
|
bits &= ~(1ul << bit);
|
|
pa = (idx * sizeof(*base) * NBBY + bit) * PAGE_SIZE;
|
|
hpt_insert(kd, pa, off);
|
|
off += PAGE_SIZE;
|
|
}
|
|
}
|
|
return (off);
|
|
}
|
|
|
|
void
|
|
_kvm_minidump_freevtop(kvm_t *kd)
|
|
{
|
|
struct vmstate *vm = kd->vmst;
|
|
|
|
free(vm->bitmap);
|
|
free(vm->page_map);
|
|
free(vm);
|
|
kd->vmst = NULL;
|
|
}
|
|
|
|
int
|
|
_kvm_minidump_initvtop(kvm_t *kd)
|
|
{
|
|
struct vmstate *vmst;
|
|
off_t off;
|
|
|
|
vmst = _kvm_malloc(kd, sizeof(*vmst));
|
|
if (vmst == 0) {
|
|
_kvm_err(kd, kd->program, "cannot allocate vm");
|
|
return (-1);
|
|
}
|
|
kd->vmst = vmst;
|
|
vmst->minidump = 1;
|
|
if (pread(kd->pmfd, &vmst->hdr, sizeof(vmst->hdr), 0) !=
|
|
sizeof(vmst->hdr)) {
|
|
_kvm_err(kd, kd->program, "cannot read dump header");
|
|
return (-1);
|
|
}
|
|
if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
|
|
sizeof(vmst->hdr.magic)) != 0) {
|
|
_kvm_err(kd, kd->program, "not a minidump for this platform");
|
|
return (-1);
|
|
}
|
|
|
|
if (vmst->hdr.version != MINIDUMP_VERSION && vmst->hdr.version != 1) {
|
|
_kvm_err(kd, kd->program, "wrong minidump version. "
|
|
"Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
|
|
return (-1);
|
|
}
|
|
|
|
/* Skip header and msgbuf */
|
|
off = PAGE_SIZE + round_page(vmst->hdr.msgbufsize);
|
|
|
|
vmst->bitmap = _kvm_malloc(kd, vmst->hdr.bitmapsize);
|
|
if (vmst->bitmap == NULL) {
|
|
_kvm_err(kd, kd->program,
|
|
"cannot allocate %d bytes for bitmap",
|
|
vmst->hdr.bitmapsize);
|
|
return (-1);
|
|
}
|
|
if (pread(kd->pmfd, vmst->bitmap, vmst->hdr.bitmapsize, off) !=
|
|
vmst->hdr.bitmapsize) {
|
|
_kvm_err(kd, kd->program,
|
|
"cannot read %d bytes for page bitmap",
|
|
vmst->hdr.bitmapsize);
|
|
return (-1);
|
|
}
|
|
off += round_page(vmst->hdr.bitmapsize);
|
|
|
|
vmst->page_map = _kvm_malloc(kd, vmst->hdr.pmapsize);
|
|
if (vmst->page_map == NULL) {
|
|
_kvm_err(kd, kd->program,
|
|
"cannot allocate %d bytes for page_map",
|
|
vmst->hdr.pmapsize);
|
|
return (-1);
|
|
}
|
|
/* This is the end of the dump, savecore may have truncated it. */
|
|
if (pread(kd->pmfd, vmst->page_map, vmst->hdr.pmapsize, off) <
|
|
PAGE_SIZE) {
|
|
_kvm_err(kd, kd->program, "cannot read %d bytes for page_map",
|
|
vmst->hdr.pmapsize);
|
|
}
|
|
off += vmst->hdr.pmapsize;
|
|
|
|
/* build physical address hash table for sparse pages */
|
|
inithash(kd, vmst->bitmap, vmst->hdr.bitmapsize, off);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
_kvm_minidump_vatop(kvm_t *kd, u_long va, off_t *pa)
|
|
{
|
|
struct vmstate *vm;
|
|
u_long offset;
|
|
pt_entry_t l3;
|
|
u_long l3_index;
|
|
u_long a;
|
|
off_t ofs;
|
|
|
|
vm = kd->vmst;
|
|
offset = va & PAGE_MASK;
|
|
|
|
if (va >= vm->hdr.dmapbase && va < vm->hdr.dmapend) {
|
|
a = (va - vm->hdr.dmapbase + vm->hdr.dmapphys) & ~PAGE_MASK;
|
|
ofs = hpt_find(kd, a);
|
|
if (ofs == -1) {
|
|
_kvm_err(kd, kd->program, "_kvm_vatop: "
|
|
"direct map address 0x%lx not in minidump", va);
|
|
goto invalid;
|
|
}
|
|
*pa = ofs + offset;
|
|
return (PAGE_SIZE - offset);
|
|
} else if (va >= vm->hdr.kernbase) {
|
|
l3_index = (va - vm->hdr.kernbase) >> L3_SHIFT;
|
|
if (l3_index >= vm->hdr.pmapsize / sizeof(*vm->page_map))
|
|
goto invalid;
|
|
l3 = vm->page_map[l3_index];
|
|
if ((l3 & ATTR_DESCR_MASK) != L3_PAGE) {
|
|
_kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
|
|
goto invalid;
|
|
}
|
|
a = l3 & ~ATTR_MASK;
|
|
ofs = hpt_find(kd, a);
|
|
if (ofs == -1) {
|
|
_kvm_err(kd, kd->program, "_kvm_vatop: "
|
|
"physical address 0x%lx not in minidump", a);
|
|
goto invalid;
|
|
}
|
|
*pa = ofs + offset;
|
|
return (PAGE_SIZE - offset);
|
|
} else {
|
|
_kvm_err(kd, kd->program,
|
|
"_kvm_vatop: virtual address 0x%lx not minidumped", va);
|
|
goto invalid;
|
|
}
|
|
|
|
invalid:
|
|
_kvm_err(kd, 0, "invalid address (0x%lx)", va);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
_kvm_minidump_kvatop(kvm_t *kd, u_long va, off_t *pa)
|
|
{
|
|
|
|
if (ISALIVE(kd)) {
|
|
_kvm_err(kd, 0, "kvm_kvatop called in live kernel!");
|
|
return (0);
|
|
}
|
|
return (_kvm_minidump_vatop(kd, va, pa));
|
|
}
|