Add riscv minidump support to libkvm.
Submitted by: Mitchell Horne <mhorne063@gmail.com> Differential Revision: https://reviews.freebsd.org/D19171
This commit is contained in:
Mark Johnston
parent
3a3dfb2815
commit
5e58ed820a
@ -18,6 +18,7 @@ SRCS= kvm.c kvm_cptime.c kvm_getloadavg.c \
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kvm_i386.c kvm_minidump_i386.c \
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kvm_i386.c kvm_minidump_i386.c \
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kvm_minidump_mips.c \
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kvm_minidump_mips.c \
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kvm_powerpc.c kvm_powerpc64.c \
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kvm_powerpc.c kvm_powerpc64.c \
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kvm_minidump_riscv.c \
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kvm_sparc64.c
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kvm_sparc64.c
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INCS= kvm.h
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INCS= kvm.h
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288
lib/libkvm/kvm_minidump_riscv.c
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288
lib/libkvm/kvm_minidump_riscv.c
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@ -0,0 +1,288 @@
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/*-
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* Copyright (c) 2006 Peter Wemm
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* Copyright (c) 2019 Mitchell Horne
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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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* RISC-V 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 <vm/vm.h>
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#include <kvm.h>
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#include "../../sys/riscv/include/minidump.h"
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#include <limits.h>
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#include "kvm_private.h"
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#include "kvm_riscv.h"
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#define riscv_round_page(x) roundup2((kvaddr_t)(x), RISCV_PAGE_SIZE)
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struct vmstate {
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struct minidumphdr hdr;
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};
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static riscv_pt_entry_t
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_riscv_pte_get(kvm_t *kd, u_long pteindex)
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{
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riscv_pt_entry_t *pte = _kvm_pmap_get(kd, pteindex, sizeof(*pte));
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return le64toh(*pte);
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}
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static int
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_riscv_minidump_probe(kvm_t *kd)
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{
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return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_RISCV) &&
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_kvm_is_minidump(kd));
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}
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static void
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_riscv_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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_riscv_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 = RISCV_PAGE_SIZE + riscv_round_page(vmst->hdr.msgbufsize);
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/* build physical address lookup table for sparse pages */
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sparse_off = off + riscv_round_page(vmst->hdr.bitmapsize) +
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riscv_round_page(vmst->hdr.pmapsize);
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if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
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RISCV_PAGE_SIZE, sizeof(uint64_t)) == -1) {
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return (-1);
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}
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off += riscv_round_page(vmst->hdr.bitmapsize);
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if (_kvm_pmap_init(kd, vmst->hdr.pmapsize, off) == -1) {
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return (-1);
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}
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off += riscv_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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_riscv_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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riscv_physaddr_t offset;
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riscv_pt_entry_t l3;
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kvaddr_t l3_index;
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riscv_physaddr_t a;
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off_t ofs;
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vm = kd->vmst;
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offset = va & RISCV_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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~RISCV_PAGE_MASK;
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ofs = _kvm_pt_find(kd, a, RISCV_PAGE_SIZE);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_riscv_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 (RISCV_PAGE_SIZE - offset);
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} else if (va >= vm->hdr.kernbase) {
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l3_index = (va - vm->hdr.kernbase) >> RISCV_L3_SHIFT;
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if (l3_index >= vm->hdr.pmapsize / sizeof(l3))
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goto invalid;
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l3 = _riscv_pte_get(kd, l3_index);
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if ((l3 & RISCV_PTE_V) == 0 || (l3 & RISCV_PTE_RWX) == 0) {
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_kvm_err(kd, kd->program,
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"_riscv_minidump_vatop: pte not valid");
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goto invalid;
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}
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a = (l3 >> RISCV_PTE_PPN0_S) << RISCV_L3_SHIFT;
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ofs = _kvm_pt_find(kd, a, RISCV_PAGE_SIZE);
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if (ofs == -1) {
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_kvm_err(kd, kd->program, "_riscv_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 (RISCV_PAGE_SIZE - offset);
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} else {
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_kvm_err(kd, kd->program,
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"_riscv_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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_riscv_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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"_riscv_minidump_kvatop called in live kernel!");
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return (0);
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}
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return (_riscv_minidump_vatop(kd, va, pa));
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}
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static int
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_riscv_native(kvm_t *kd __unused)
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{
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#ifdef __riscv
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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 vm_prot_t
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_riscv_entry_to_prot(riscv_pt_entry_t pte)
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{
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vm_prot_t prot = VM_PROT_READ;
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if ((pte & RISCV_PTE_W) != 0)
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prot |= VM_PROT_WRITE;
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if ((pte & RISCV_PTE_X) != 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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_riscv_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.pmapsize / sizeof(riscv_pt_entry_t);
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u_long bmindex, dva, pa, pteindex, va;
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struct kvm_bitmap bm;
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vm_prot_t prot;
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int ret = 0;
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if (!_kvm_bitmap_init(&bm, vm->hdr.bitmapsize, &bmindex))
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return (0);
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for (pteindex = 0; pteindex < nptes; pteindex++) {
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riscv_pt_entry_t pte = _riscv_pte_get(kd, pteindex);
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if (((pte & RISCV_PTE_V) == 0) ||
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((pte & RISCV_PTE_RWX) == 0))
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continue;
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va = vm->hdr.kernbase + (pteindex << RISCV_L3_SHIFT);
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pa = (pte >> RISCV_PTE_PPN0_S) << RISCV_L3_SHIFT;
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dva = vm->hdr.dmapbase + pa;
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if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
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_riscv_entry_to_prot(pte), RISCV_PAGE_SIZE, 0)) {
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goto out;
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}
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}
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while (_kvm_bitmap_next(&bm, &bmindex)) {
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pa = bmindex * RISCV_PAGE_SIZE;
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dva = vm->hdr.dmapbase + pa;
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if (vm->hdr.dmapend < (dva + RISCV_PAGE_SIZE))
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break;
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va = 0;
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prot = VM_PROT_READ | VM_PROT_WRITE;
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if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
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prot, RISCV_PAGE_SIZE, 0)) {
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goto out;
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}
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}
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ret = 1;
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out:
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_kvm_bitmap_deinit(&bm);
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return (ret);
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}
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static struct kvm_arch kvm_riscv_minidump = {
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.ka_probe = _riscv_minidump_probe,
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.ka_initvtop = _riscv_minidump_initvtop,
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.ka_freevtop = _riscv_minidump_freevtop,
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.ka_kvatop = _riscv_minidump_kvatop,
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.ka_native = _riscv_native,
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.ka_walk_pages = _riscv_minidump_walk_pages,
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};
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KVM_ARCH(kvm_riscv_minidump);
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90
lib/libkvm/kvm_riscv.h
Normal file
90
lib/libkvm/kvm_riscv.h
Normal file
@ -0,0 +1,90 @@
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/*-
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* Copyright (c) 2015 John H. Baldwin <jhb@FreeBSD.org>
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* Copyright (c) 2019 Mitchell Horne
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* All rights reserved.
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*
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|
* 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.
|
||||||
|
*
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||||||
|
* 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)
|
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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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* $FreeBSD$
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|
*/
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#ifndef __KVM_RISCV_H__
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#define __KVM_RISCV_H__
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#ifdef __riscv
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#include <machine/pte.h>
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#endif
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typedef uint64_t riscv_physaddr_t;
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typedef uint64_t riscv_pt_entry_t;
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#define RISCV_PAGE_SHIFT 12
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#define RISCV_PAGE_SIZE (1 << RISCV_PAGE_SHIFT)
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#define RISCV_PAGE_MASK (RISCV_PAGE_SIZE - 1)
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/* Source: sys/riscv/include/pte.h */
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#define RISCV_L3_SHIFT 12
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#define RISCV_L3_SIZE (1 << L3_SHIFT)
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#define RISCV_L3_OFFSET (L3_SIZE - 1)
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#define RISCV_PTE_SW_MANAGED (1 << 9)
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||||||
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#define RISCV_PTE_SW_WIRED (1 << 8)
|
||||||
|
#define RISCV_PTE_D (1 << 7) /* Dirty */
|
||||||
|
#define RISCV_PTE_A (1 << 6) /* Accessed */
|
||||||
|
#define RISCV_PTE_G (1 << 5) /* Global */
|
||||||
|
#define RISCV_PTE_U (1 << 4) /* User */
|
||||||
|
#define RISCV_PTE_X (1 << 3) /* Execute */
|
||||||
|
#define RISCV_PTE_W (1 << 2) /* Write */
|
||||||
|
#define RISCV_PTE_R (1 << 1) /* Read */
|
||||||
|
#define RISCV_PTE_V (1 << 0) /* Valid */
|
||||||
|
#define RISCV_PTE_RWX (RISCV_PTE_R | RISCV_PTE_W | RISCV_PTE_X)
|
||||||
|
|
||||||
|
#define RISCV_PTE_PPN0_S 10
|
||||||
|
|
||||||
|
#ifdef __riscv
|
||||||
|
_Static_assert(sizeof(pt_entry_t) == sizeof(riscv_pt_entry_t),
|
||||||
|
"pt_entry_t size mismatch");
|
||||||
|
|
||||||
|
_Static_assert(PAGE_SHIFT == RISCV_PAGE_SHIFT, "PAGE_SHIFT mismatch");
|
||||||
|
_Static_assert(PAGE_SIZE == RISCV_PAGE_SIZE, "PAGE_SIZE mismatch");
|
||||||
|
_Static_assert(PAGE_MASK == RISCV_PAGE_MASK, "PAGE_MASK mismatch");
|
||||||
|
|
||||||
|
_Static_assert(L3_SHIFT == RISCV_L3_SHIFT, "L3_SHIFT mismatch");
|
||||||
|
_Static_assert(L3_SIZE == RISCV_L3_SIZE, "L3_SIZE mismatch");
|
||||||
|
_Static_assert(L3_OFFSET == RISCV_L3_OFFSET, "L3_OFFSET mismatch");
|
||||||
|
_Static_assert(PTE_PPN0_S == RISCV_PTE_PPN0_S, "PTE_PPN0_S mismatch");
|
||||||
|
|
||||||
|
_Static_assert(PTE_SW_MANAGED == RISCV_PTE_SW_MANAGED,
|
||||||
|
"PTE_SW_MANAGED mismatch");
|
||||||
|
_Static_assert(PTE_SW_WIRED == RISCV_PTE_SW_WIRED, "PTE_SW_WIRED mismatch");
|
||||||
|
_Static_assert(PTE_D == RISCV_PTE_D, "PTE_D mismatch");
|
||||||
|
_Static_assert(PTE_A == RISCV_PTE_A, "PTE_A mismatch");
|
||||||
|
_Static_assert(PTE_G == RISCV_PTE_G, "PTE_G mismatch");
|
||||||
|
_Static_assert(PTE_U == RISCV_PTE_U, "PTE_U mismatch");
|
||||||
|
_Static_assert(PTE_X == RISCV_PTE_X, "PTE_X mismatch");
|
||||||
|
_Static_assert(PTE_W == RISCV_PTE_W, "PTE_W mismatch");
|
||||||
|
_Static_assert(PTE_R == RISCV_PTE_R, "PTE_R mismatch");
|
||||||
|
_Static_assert(PTE_V == RISCV_PTE_V, "PTE_V mismatch");
|
||||||
|
_Static_assert(PTE_RWX == RISCV_PTE_RWX, "PTE_RWX mismatch");
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* !__KVM_RISCV_H__ */
|
||||||
Loading…
Reference in New Issue
Block a user