881b0edb8f
- Fix -Wunused warnings with *_native detection handlers by marking `kd` __unused, except with arm/mips, where a slightly more complicated scheme is required to handle the native case vs the non-native case. - Fix -Wmissing-variable-declarations warnings by marking struct kvm_arch objects static. Differential Revision: D10071 MFC after: 1 week Reviewed by: vangyzen Tested with: WIP test code (D10024) // kgdb7121 (i386 crash/kernel on amd64) Sponsored by: Dell EMC Isilon
237 lines
6.6 KiB
C
237 lines
6.6 KiB
C
/*-
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* Copyright (c) 2006 Peter Wemm
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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.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* From: FreeBSD: src/lib/libkvm/kvm_minidump_amd64.c r261799
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* ARM64 (AArch64) machine dependent routines for kvm and minidumps.
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*/
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#include <sys/param.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <kvm.h>
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#include "../../sys/arm64/include/minidump.h"
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#include <limits.h>
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#include "kvm_private.h"
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#include "kvm_aarch64.h"
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#define aarch64_round_page(x) roundup2((kvaddr_t)(x), AARCH64_PAGE_SIZE)
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struct vmstate {
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struct minidumphdr hdr;
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uint64_t *page_map;
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};
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static int
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_aarch64_minidump_probe(kvm_t *kd)
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{
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return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_AARCH64) &&
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_kvm_is_minidump(kd));
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}
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static void
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_aarch64_minidump_freevtop(kvm_t *kd)
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{
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struct vmstate *vm = kd->vmst;
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free(vm->page_map);
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free(vm);
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kd->vmst = NULL;
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}
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static int
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_aarch64_minidump_initvtop(kvm_t *kd)
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{
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struct vmstate *vmst;
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off_t off, sparse_off;
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vmst = _kvm_malloc(kd, sizeof(*vmst));
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if (vmst == NULL) {
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_kvm_err(kd, kd->program, "cannot allocate vm");
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return (-1);
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}
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kd->vmst = vmst;
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if (pread(kd->pmfd, &vmst->hdr, sizeof(vmst->hdr), 0) !=
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sizeof(vmst->hdr)) {
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_kvm_err(kd, kd->program, "cannot read dump header");
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return (-1);
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}
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if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
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sizeof(vmst->hdr.magic)) != 0) {
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_kvm_err(kd, kd->program, "not a minidump for this platform");
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return (-1);
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}
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vmst->hdr.version = le32toh(vmst->hdr.version);
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if (vmst->hdr.version != MINIDUMP_VERSION) {
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_kvm_err(kd, kd->program, "wrong minidump version. "
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"Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
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return (-1);
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}
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vmst->hdr.msgbufsize = le32toh(vmst->hdr.msgbufsize);
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vmst->hdr.bitmapsize = le32toh(vmst->hdr.bitmapsize);
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vmst->hdr.pmapsize = le32toh(vmst->hdr.pmapsize);
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vmst->hdr.kernbase = le64toh(vmst->hdr.kernbase);
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vmst->hdr.dmapphys = le64toh(vmst->hdr.dmapphys);
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vmst->hdr.dmapbase = le64toh(vmst->hdr.dmapbase);
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vmst->hdr.dmapend = le64toh(vmst->hdr.dmapend);
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/* Skip header and msgbuf */
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off = AARCH64_PAGE_SIZE + aarch64_round_page(vmst->hdr.msgbufsize);
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/* build physical address lookup table for sparse pages */
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sparse_off = off + aarch64_round_page(vmst->hdr.bitmapsize) +
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aarch64_round_page(vmst->hdr.pmapsize);
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if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
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AARCH64_PAGE_SIZE, sizeof(uint64_t)) == -1) {
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_kvm_err(kd, kd->program, "cannot load core bitmap");
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return (-1);
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}
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off += aarch64_round_page(vmst->hdr.bitmapsize);
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vmst->page_map = _kvm_malloc(kd, vmst->hdr.pmapsize);
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if (vmst->page_map == NULL) {
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_kvm_err(kd, kd->program,
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"cannot allocate %d bytes for page_map",
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vmst->hdr.pmapsize);
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return (-1);
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}
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/* This is the end of the dump, savecore may have truncated it. */
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/*
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* XXX: This doesn't make sense. The pmap is not at the end,
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* and if it is truncated we don't have any actual data (it's
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* all stored after the bitmap and pmap. -- jhb
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*/
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if (pread(kd->pmfd, vmst->page_map, vmst->hdr.pmapsize, off) <
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AARCH64_PAGE_SIZE) {
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_kvm_err(kd, kd->program, "cannot read %d bytes for page_map",
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vmst->hdr.pmapsize);
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return (-1);
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}
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off += aarch64_round_page(vmst->hdr.pmapsize);
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return (0);
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}
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static int
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_aarch64_minidump_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
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{
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struct vmstate *vm;
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aarch64_physaddr_t offset;
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aarch64_pte_t l3;
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kvaddr_t l3_index;
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aarch64_physaddr_t a;
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off_t ofs;
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vm = kd->vmst;
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offset = va & AARCH64_PAGE_MASK;
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if (va >= vm->hdr.dmapbase && va < vm->hdr.dmapend) {
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a = (va - vm->hdr.dmapbase + vm->hdr.dmapphys) &
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~AARCH64_PAGE_MASK;
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ofs = _kvm_pt_find(kd, a);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_aarch64_minidump_vatop: "
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"direct map address 0x%jx not in minidump",
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(uintmax_t)va);
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goto invalid;
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}
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*pa = ofs + offset;
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return (AARCH64_PAGE_SIZE - offset);
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} else if (va >= vm->hdr.kernbase) {
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l3_index = (va - vm->hdr.kernbase) >> AARCH64_L3_SHIFT;
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if (l3_index >= vm->hdr.pmapsize / sizeof(*vm->page_map))
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goto invalid;
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l3 = le64toh(vm->page_map[l3_index]);
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if ((l3 & AARCH64_ATTR_DESCR_MASK) != AARCH64_L3_PAGE) {
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_kvm_err(kd, kd->program,
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"_aarch64_minidump_vatop: pde not valid");
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goto invalid;
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}
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a = l3 & ~AARCH64_ATTR_MASK;
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ofs = _kvm_pt_find(kd, a);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_aarch64_minidump_vatop: "
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"physical address 0x%jx not in minidump",
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(uintmax_t)a);
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goto invalid;
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}
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*pa = ofs + offset;
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return (AARCH64_PAGE_SIZE - offset);
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} else {
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_kvm_err(kd, kd->program,
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"_aarch64_minidump_vatop: virtual address 0x%jx not minidumped",
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(uintmax_t)va);
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goto invalid;
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}
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invalid:
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_kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
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return (0);
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}
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static int
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_aarch64_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
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{
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0,
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"_aarch64_minidump_kvatop called in live kernel!");
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return (0);
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}
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return (_aarch64_minidump_vatop(kd, va, pa));
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}
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static int
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_aarch64_native(kvm_t *kd __unused)
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{
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#ifdef __aarch64__
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return (1);
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#else
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return (0);
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#endif
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}
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static struct kvm_arch kvm_aarch64_minidump = {
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.ka_probe = _aarch64_minidump_probe,
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.ka_initvtop = _aarch64_minidump_initvtop,
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.ka_freevtop = _aarch64_minidump_freevtop,
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.ka_kvatop = _aarch64_minidump_kvatop,
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.ka_native = _aarch64_native,
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};
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KVM_ARCH(kvm_aarch64_minidump);
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