5e53a4f90f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
274 lines
7.5 KiB
C
274 lines
7.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008 Semihalf, Grzegorz Bernacki
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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_i386.c,v 1.2 2006/06/05 08:51:14
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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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* ARM machine dependent routines for kvm and minidumps.
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*/
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#include <sys/endian.h>
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#include <sys/param.h>
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#include <vm/vm.h>
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#include <kvm.h>
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#include <limits.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 "../../sys/arm/include/minidump.h"
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#include "kvm_private.h"
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#include "kvm_arm.h"
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#define arm_round_page(x) roundup2((kvaddr_t)(x), ARM_PAGE_SIZE)
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struct vmstate {
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struct minidumphdr hdr;
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unsigned char ei_data;
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};
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static arm_pt_entry_t
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_arm_pte_get(kvm_t *kd, u_long pteindex)
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{
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arm_pt_entry_t *pte = _kvm_pmap_get(kd, pteindex, sizeof(*pte));
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return _kvm32toh(kd, *pte);
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}
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static int
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_arm_minidump_probe(kvm_t *kd)
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{
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return (_kvm_probe_elf_kernel(kd, ELFCLASS32, EM_ARM) &&
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_kvm_is_minidump(kd));
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}
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static void
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_arm_minidump_freevtop(kvm_t *kd)
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{
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struct vmstate *vm = kd->vmst;
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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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_arm_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,
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sizeof(vmst->hdr), 0) != 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 = _kvm32toh(kd, 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 = _kvm32toh(kd, vmst->hdr.msgbufsize);
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vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
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vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
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vmst->hdr.kernbase = _kvm32toh(kd, vmst->hdr.kernbase);
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vmst->hdr.arch = _kvm32toh(kd, vmst->hdr.arch);
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vmst->hdr.mmuformat = _kvm32toh(kd, vmst->hdr.mmuformat);
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if (vmst->hdr.mmuformat == MINIDUMP_MMU_FORMAT_UNKNOWN) {
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/* This is a safe default as 1K pages are not used. */
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vmst->hdr.mmuformat = MINIDUMP_MMU_FORMAT_V6;
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}
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/* Skip header and msgbuf */
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off = ARM_PAGE_SIZE + arm_round_page(vmst->hdr.msgbufsize);
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sparse_off = off + arm_round_page(vmst->hdr.bitmapsize) +
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arm_round_page(vmst->hdr.ptesize);
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if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
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ARM_PAGE_SIZE, sizeof(uint32_t)) == -1) {
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return (-1);
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}
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off += arm_round_page(vmst->hdr.bitmapsize);
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if (_kvm_pmap_init(kd, vmst->hdr.ptesize, off) == -1) {
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return (-1);
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}
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off += arm_round_page(vmst->hdr.ptesize);
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return (0);
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}
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static int
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_arm_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
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{
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struct vmstate *vm;
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arm_pt_entry_t pte;
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arm_physaddr_t offset, a;
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kvaddr_t pteindex;
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off_t ofs;
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "_arm_minidump_kvatop called in live kernel!");
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return (0);
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}
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vm = kd->vmst;
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if (va >= vm->hdr.kernbase) {
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pteindex = (va - vm->hdr.kernbase) >> ARM_PAGE_SHIFT;
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if (pteindex >= vm->hdr.ptesize / sizeof(pte))
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goto invalid;
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pte = _arm_pte_get(kd, pteindex);
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if ((pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_INV) {
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_kvm_err(kd, kd->program,
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"_arm_minidump_kvatop: pte not valid");
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goto invalid;
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}
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if ((pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_L) {
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/* 64K page -> convert to be like 4K page */
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offset = va & ARM_L2_S_OFFSET;
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a = (pte & ARM_L2_L_FRAME) +
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(va & ARM_L2_L_OFFSET & ARM_L2_S_FRAME);
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} else {
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if (kd->vmst->hdr.mmuformat == MINIDUMP_MMU_FORMAT_V4 &&
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(pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_T) {
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_kvm_err(kd, kd->program,
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"_arm_minidump_kvatop: pte not supported");
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goto invalid;
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}
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/* 4K page */
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offset = va & ARM_L2_S_OFFSET;
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a = pte & ARM_L2_S_FRAME;
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}
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ofs = _kvm_pt_find(kd, a, ARM_PAGE_SIZE);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_arm_minidump_kvatop: "
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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 (ARM_PAGE_SIZE - offset);
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} else
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_kvm_err(kd, kd->program, "_arm_minidump_kvatop: virtual "
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"address 0x%jx not minidumped", (uintmax_t)va);
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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 vm_prot_t
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_arm_entry_to_prot(kvm_t *kd, arm_pt_entry_t pte)
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{
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struct vmstate *vm = kd->vmst;
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vm_prot_t prot = VM_PROT_READ;
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/* Source: arm/arm/pmap-v4.c:pmap_fault_fixup() */
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if (vm->hdr.mmuformat == MINIDUMP_MMU_FORMAT_V4) {
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if (pte & ARM_L2_S_PROT_W)
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prot |= VM_PROT_WRITE;
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return prot;
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}
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/* Source: arm/arm/pmap-v6.c:pmap_protect() */
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if ((pte & ARM_PTE2_RO) == 0)
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prot |= VM_PROT_WRITE;
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if ((pte & ARM_PTE2_NX) == 0)
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prot |= VM_PROT_EXECUTE;
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return prot;
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}
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static int
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_arm_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
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{
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struct vmstate *vm = kd->vmst;
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u_long nptes = vm->hdr.ptesize / sizeof(arm_pt_entry_t);
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u_long dva, pa, pteindex, va;
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for (pteindex = 0; pteindex < nptes; pteindex++) {
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arm_pt_entry_t pte = _arm_pte_get(kd, pteindex);
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if ((pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_INV)
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continue;
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va = vm->hdr.kernbase + (pteindex << ARM_PAGE_SHIFT);
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if ((pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_L) {
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/* 64K page */
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pa = (pte & ARM_L2_L_FRAME) +
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(va & ARM_L2_L_OFFSET & ARM_L2_S_FRAME);
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} else {
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if (vm->hdr.mmuformat == MINIDUMP_MMU_FORMAT_V4 &&
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(pte & ARM_L2_TYPE_MASK) == ARM_L2_TYPE_T) {
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continue;
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}
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/* 4K page */
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pa = pte & ARM_L2_S_FRAME;
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}
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dva = 0; /* no direct map on this platform */
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if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
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_arm_entry_to_prot(kd, pte), ARM_PAGE_SIZE, 0))
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return (0);
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}
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return (1);
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}
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static struct kvm_arch kvm_arm_minidump = {
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.ka_probe = _arm_minidump_probe,
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.ka_initvtop = _arm_minidump_initvtop,
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.ka_freevtop = _arm_minidump_freevtop,
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.ka_kvatop = _arm_minidump_kvatop,
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.ka_native = _arm_native,
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.ka_walk_pages = _arm_minidump_walk_pages,
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};
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KVM_ARCH(kvm_arm_minidump);
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