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.
366 lines
9.2 KiB
C
366 lines
9.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010 Oleksandr Tymoshenko
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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_arm.c r214223
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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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* MIPS machine dependent routines for kvm and minidumps.
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*/
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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/mips/include/cpuregs.h"
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#include "../../sys/mips/include/minidump.h"
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#include "kvm_private.h"
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#include "kvm_mips.h"
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#define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
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struct vmstate {
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struct minidumphdr hdr;
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int pte_size;
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};
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static int
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_mips_minidump_probe(kvm_t *kd)
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{
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if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
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kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
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return (0);
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if (kd->nlehdr.e_machine != EM_MIPS)
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return (0);
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return (_kvm_is_minidump(kd));
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}
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static void
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_mips_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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_mips_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 (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
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kd->nlehdr.e_flags & EF_MIPS_ABI2)
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vmst->pte_size = 64;
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else
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vmst->pte_size = 32;
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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 = _kvm64toh(kd, vmst->hdr.kernbase);
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vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
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vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
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/* Skip header and msgbuf */
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off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
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sparse_off = off + mips_round_page(vmst->hdr.bitmapsize) +
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mips_round_page(vmst->hdr.ptesize);
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if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
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MIPS_PAGE_SIZE, sizeof(uint32_t)) == -1) {
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return (-1);
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}
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off += mips_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 += mips_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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_mips_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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mips_physaddr_t offset, a;
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kvaddr_t pteindex;
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u_long valid;
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off_t ofs;
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mips32_pte_t pte32;
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mips64_pte_t pte64;
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
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return (0);
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}
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offset = va & MIPS_PAGE_MASK;
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/* Operate with page-aligned address */
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va &= ~MIPS_PAGE_MASK;
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vm = kd->vmst;
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if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
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if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
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a = va & MIPS_XKPHYS_PHYS_MASK;
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goto found;
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}
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if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
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a = va & MIPS_KSEG0_PHYS_MASK;
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goto found;
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}
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if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
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a = va & MIPS_KSEG0_PHYS_MASK;
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goto found;
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}
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} else {
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if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
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a = va & MIPS_KSEG0_PHYS_MASK;
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goto found;
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}
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if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
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a = va & MIPS_KSEG0_PHYS_MASK;
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goto found;
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}
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}
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if (va >= vm->hdr.kernbase) {
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pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
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if (vm->pte_size == 64) {
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valid = pteindex < vm->hdr.ptesize / sizeof(pte64);
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if (pteindex >= vm->hdr.ptesize / sizeof(pte64))
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goto invalid;
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pte64 = _mips64_pte_get(kd, pteindex);
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valid = pte64 & MIPS_PTE_V;
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if (valid)
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a = MIPS64_PTE_TO_PA(pte64);
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} else {
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if (pteindex >= vm->hdr.ptesize / sizeof(pte32))
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goto invalid;
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pte32 = _mips32_pte_get(kd, pteindex);
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valid = pte32 & MIPS_PTE_V;
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if (valid)
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a = MIPS32_PTE_TO_PA(pte32);
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}
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if (!valid) {
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_kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
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"not valid");
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goto invalid;
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}
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} else {
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_kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
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"address 0x%jx not minidumped", (uintmax_t)va);
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return (0);
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}
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found:
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ofs = _kvm_pt_find(kd, a, MIPS_PAGE_SIZE);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
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"address 0x%jx not in minidump", (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 (MIPS_PAGE_SIZE - offset);
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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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#ifdef __mips__
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_mips_native(kvm_t *kd)
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#else
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_mips_native(kvm_t *kd __unused)
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#endif
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{
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#ifdef __mips__
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#ifdef __mips_n64
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if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
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return (0);
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#else
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if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
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return (0);
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#ifdef __mips_n32
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if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
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return (0);
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#else
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if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
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return (0);
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#endif
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#endif
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#if _BYTE_ORDER == _LITTLE_ENDIAN
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return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
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#else
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return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
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#endif
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#else
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return (0);
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#endif
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}
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struct mips_iter {
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kvm_t *kd;
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u_long nptes;
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u_long pteindex;
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};
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static void
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_mips_iterator_init(struct mips_iter *it, kvm_t *kd)
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{
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struct vmstate *vm = kd->vmst;
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it->kd = kd;
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it->pteindex = 0;
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if (vm->pte_size == 64)
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it->nptes = vm->hdr.ptesize / sizeof(mips64_pte_t);
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else
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it->nptes = vm->hdr.ptesize / sizeof(mips32_pte_t);
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return;
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}
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static int
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_mips_iterator_next(struct mips_iter *it, u_long *pa, u_long *va, u_long *dva,
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vm_prot_t *prot)
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{
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struct vmstate *vm = it->kd->vmst;
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int found = 0;
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mips64_pte_t pte64;
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mips32_pte_t pte32;
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/*
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* mips/mips/pmap.c: init_pte_prot / pmap_protect indicate that all
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* pages are R|X at least.
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*/
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*prot = VM_PROT_READ | VM_PROT_EXECUTE;
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*pa = 0;
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*va = 0;
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*dva = 0;
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for (;it->pteindex < it->nptes && found == 0; it->pteindex++) {
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if (vm->pte_size == 64) {
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pte64 = _mips64_pte_get(it->kd, it->pteindex);
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if ((pte64 & MIPS_PTE_V) == 0)
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continue;
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if ((pte64 & MIPS64_PTE_RO) == 0)
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*prot |= VM_PROT_WRITE;
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*pa = MIPS64_PTE_TO_PA(pte64);
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} else {
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pte32 = _mips32_pte_get(it->kd, it->pteindex);
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if ((pte32 & MIPS_PTE_V) == 0)
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continue;
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if ((pte32 & MIPS32_PTE_RO) == 0)
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*prot |= VM_PROT_WRITE;
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*pa = MIPS32_PTE_TO_PA(pte32);
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}
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*va = vm->hdr.kernbase + (it->pteindex << MIPS_PAGE_SHIFT);
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found = 1;
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/* advance pteindex regardless */
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}
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return found;
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}
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static int
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_mips_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
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{
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struct mips_iter it;
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u_long dva, pa, va;
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vm_prot_t prot;
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/* Generate direct mapped entries; need page entries for prot etc? */
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if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
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/* MIPS_XKPHYS_START..MIPS_XKPHYS_END */
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/* MIPS64_KSEG0_START..MIPS64_KSEG0_END */
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/* MIPS64_KSEG1_START..MIPS64_KSEG1_START */
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} else {
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/* MIPS32_KSEG0_START..MIPS32_KSEG0_END */
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/* MIPS32_KSEG1_START..MIPS32_KSEG1_END */
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}
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_mips_iterator_init(&it, kd);
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while (_mips_iterator_next(&it, &pa, &va, &dva, &prot)) {
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if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
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prot, MIPS_PAGE_SIZE, 0)) {
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return (0);
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}
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}
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return (1);
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}
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static struct kvm_arch kvm_mips_minidump = {
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.ka_probe = _mips_minidump_probe,
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.ka_initvtop = _mips_minidump_initvtop,
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.ka_freevtop = _mips_minidump_freevtop,
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.ka_kvatop = _mips_minidump_kvatop,
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.ka_native = _mips_native,
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.ka_walk_pages = _mips_minidump_walk_pages,
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};
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KVM_ARCH(kvm_mips_minidump);
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