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📄 Makefile(1.16 KB)
📄 Makefile.depend(272 B)
📄 kvm.3(4.95 KB)
📄 kvm.c(12.12 KB)
📄 kvm.h(4.11 KB)
📄 kvm_aarch64.h(2.57 KB)
📄 kvm_amd64.c(8.44 KB)
📄 kvm_amd64.h(3.66 KB)
📄 kvm_arm.c(6.93 KB)
📄 kvm_arm.h(5.18 KB)
📄 kvm_cptime.c(3.79 KB)
📄 kvm_getcptime.3(2.55 KB)
📄 kvm_geterr.3(2.97 KB)
📄 kvm_getloadavg.3(2.43 KB)
📄 kvm_getloadavg.c(3.22 KB)
📄 kvm_getpcpu.3(4.61 KB)
📄 kvm_getprocs.3(5.08 KB)
📄 kvm_getswapinfo.3(3.34 KB)
📄 kvm_getswapinfo.c(6.94 KB)
📄 kvm_i386.c(10.36 KB)
📄 kvm_i386.h(3.15 KB)
📄 kvm_kerndisp.3(2.15 KB)
📄 kvm_minidump_aarch64.c(7.93 KB)
📄 kvm_minidump_amd64.c(11.77 KB)
📄 kvm_minidump_arm.c(7.74 KB)
📄 kvm_minidump_i386.c(8.65 KB)
📄 kvm_minidump_mips.c(9.58 KB)
📄 kvm_minidump_powerpc64.c(6.37 KB)
📄 kvm_minidump_powerpc64_hpt.c(16.44 KB)
📄 kvm_minidump_riscv.c(7.84 KB)
📄 kvm_mips.h(4.34 KB)
📄 kvm_native.3(2.12 KB)
📄 kvm_nlist.3(3.6 KB)
📄 kvm_open.3(6.68 KB)
📄 kvm_pcpu.c(8.93 KB)
📄 kvm_powerpc.c(6.02 KB)
📄 kvm_powerpc64.c(6.84 KB)
📄 kvm_powerpc64.h(2.52 KB)
📄 kvm_private.c(21.63 KB)
📄 kvm_private.h(6.92 KB)
📄 kvm_proc.c(20.6 KB)
📄 kvm_read.3(3.27 KB)
📄 kvm_riscv.h(3.56 KB)
📄 kvm_vnet.c(6.56 KB)
📁 tests

Editing: kvm_minidump_aarch64.c

/*-
 * Copyright (c) 2006 Peter Wemm
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * From: FreeBSD: src/lib/libkvm/kvm_minidump_amd64.c r261799
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * ARM64 (AArch64) machine dependent routines for kvm and minidumps.
 */

#include <sys/param.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vm/vm.h>
#include <kvm.h>

#include "../../sys/arm64/include/minidump.h"

#include <limits.h>

#include "kvm_private.h"
#include "kvm_aarch64.h"

#define	aarch64_round_page(x)	roundup2((kvaddr_t)(x), AARCH64_PAGE_SIZE)

struct vmstate {
	struct minidumphdr hdr;
};

static aarch64_pte_t
_aarch64_pte_get(kvm_t *kd, u_long pteindex)
{
	aarch64_pte_t *pte = _kvm_pmap_get(kd, pteindex, sizeof(*pte));

return le64toh(*pte);
}

static int
_aarch64_minidump_probe(kvm_t *kd)
{

return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_AARCH64) &&
	    _kvm_is_minidump(kd));
}

static void
_aarch64_minidump_freevtop(kvm_t *kd)
{
	struct vmstate *vm = kd->vmst;

free(vm);
	kd->vmst = NULL;
}

static int
_aarch64_minidump_initvtop(kvm_t *kd)
{
	struct vmstate *vmst;
	off_t off, dump_avail_off, sparse_off;

vmst = _kvm_malloc(kd, sizeof(*vmst));
	if (vmst == NULL) {
		_kvm_err(kd, kd->program, "cannot allocate vm");
		return (-1);
	}
	kd->vmst = vmst;
	if (pread(kd->pmfd, &vmst->hdr, sizeof(vmst->hdr), 0) !=
	    sizeof(vmst->hdr)) {
		_kvm_err(kd, kd->program, "cannot read dump header");
		return (-1);
	}
	if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
	    sizeof(vmst->hdr.magic)) != 0) {
		_kvm_err(kd, kd->program, "not a minidump for this platform");
		return (-1);
	}

vmst->hdr.version = le32toh(vmst->hdr.version);
	if (vmst->hdr.version != MINIDUMP_VERSION && vmst->hdr.version != 1) {
		_kvm_err(kd, kd->program, "wrong minidump version. "
		    "Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
		return (-1);
	}
	vmst->hdr.msgbufsize = le32toh(vmst->hdr.msgbufsize);
	vmst->hdr.bitmapsize = le32toh(vmst->hdr.bitmapsize);
	vmst->hdr.pmapsize = le32toh(vmst->hdr.pmapsize);
	vmst->hdr.kernbase = le64toh(vmst->hdr.kernbase);
	vmst->hdr.dmapphys = le64toh(vmst->hdr.dmapphys);
	vmst->hdr.dmapbase = le64toh(vmst->hdr.dmapbase);
	vmst->hdr.dmapend = le64toh(vmst->hdr.dmapend);
	vmst->hdr.dumpavailsize = vmst->hdr.version == MINIDUMP_VERSION ?
	    le32toh(vmst->hdr.dumpavailsize) : 0;

/* Skip header and msgbuf */
	dump_avail_off = AARCH64_PAGE_SIZE + aarch64_round_page(vmst->hdr.msgbufsize);

/* Skip dump_avail */
	off = dump_avail_off + aarch64_round_page(vmst->hdr.dumpavailsize);

/* build physical address lookup table for sparse pages */
	sparse_off = off + aarch64_round_page(vmst->hdr.bitmapsize) +
	    aarch64_round_page(vmst->hdr.pmapsize);
	if (_kvm_pt_init(kd, vmst->hdr.dumpavailsize, dump_avail_off,
	    vmst->hdr.bitmapsize, off, sparse_off, AARCH64_PAGE_SIZE) == -1) {
		return (-1);
	}
	off += aarch64_round_page(vmst->hdr.bitmapsize);

if (_kvm_pmap_init(kd, vmst->hdr.pmapsize, off) == -1) {
		return (-1);
	}
	off += aarch64_round_page(vmst->hdr.pmapsize);

return (0);
}

static int
_aarch64_minidump_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
{
	struct vmstate *vm;
	aarch64_physaddr_t offset;
	aarch64_pte_t l3;
	kvaddr_t l3_index;
	aarch64_physaddr_t a;
	off_t ofs;

vm = kd->vmst;
	offset = va & AARCH64_PAGE_MASK;

if (va >= vm->hdr.dmapbase && va < vm->hdr.dmapend) {
		a = (va - vm->hdr.dmapbase + vm->hdr.dmapphys) &
		    ~AARCH64_PAGE_MASK;
		ofs = _kvm_pt_find(kd, a, AARCH64_PAGE_SIZE);
		if (ofs == -1) {
			_kvm_err(kd, kd->program, "_aarch64_minidump_vatop: "
			    "direct map address 0x%jx not in minidump",
			    (uintmax_t)va);
			goto invalid;
		}
		*pa = ofs + offset;
		return (AARCH64_PAGE_SIZE - offset);
	} else if (va >= vm->hdr.kernbase) {
		l3_index = (va - vm->hdr.kernbase) >> AARCH64_L3_SHIFT;
		if (l3_index >= vm->hdr.pmapsize / sizeof(l3))
			goto invalid;
		l3 = _aarch64_pte_get(kd, l3_index);
		if ((l3 & AARCH64_ATTR_DESCR_MASK) != AARCH64_L3_PAGE) {
			_kvm_err(kd, kd->program,
			    "_aarch64_minidump_vatop: pde not valid");
			goto invalid;
		}
		a = l3 & ~AARCH64_ATTR_MASK;
		ofs = _kvm_pt_find(kd, a, AARCH64_PAGE_SIZE);
		if (ofs == -1) {
			_kvm_err(kd, kd->program, "_aarch64_minidump_vatop: "
			    "physical address 0x%jx not in minidump",
			    (uintmax_t)a);
			goto invalid;
		}
		*pa = ofs + offset;
		return (AARCH64_PAGE_SIZE - offset);
	} else {
		_kvm_err(kd, kd->program,
	    "_aarch64_minidump_vatop: virtual address 0x%jx not minidumped",
		    (uintmax_t)va);
		goto invalid;
	}

invalid:
	_kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
	return (0);
}

static int
_aarch64_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
{

if (ISALIVE(kd)) {
		_kvm_err(kd, 0,
		    "_aarch64_minidump_kvatop called in live kernel!");
		return (0);
	}
	return (_aarch64_minidump_vatop(kd, va, pa));
}

static int
_aarch64_native(kvm_t *kd __unused)
{

#ifdef __aarch64__
	return (1);
#else
	return (0);
#endif
}

static vm_prot_t
_aarch64_entry_to_prot(aarch64_pte_t pte)
{
	vm_prot_t prot = VM_PROT_READ;

/* Source: arm64/arm64/pmap.c:pmap_protect() */
	if ((pte & AARCH64_ATTR_AP(AARCH64_ATTR_AP_RO)) == 0)
		prot |= VM_PROT_WRITE;
	if ((pte & AARCH64_ATTR_XN) == 0)
		prot |= VM_PROT_EXECUTE;
	return prot;
}

static int
_aarch64_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
{
	struct vmstate *vm = kd->vmst;
	u_long nptes = vm->hdr.pmapsize / sizeof(aarch64_pte_t);
	u_long bmindex, dva, pa, pteindex, va;
	struct kvm_bitmap bm;
	vm_prot_t prot;
	int ret = 0;

if (!_kvm_bitmap_init(&bm, vm->hdr.bitmapsize, &bmindex))
		return (0);

for (pteindex = 0; pteindex < nptes; pteindex++) {
		aarch64_pte_t pte = _aarch64_pte_get(kd, pteindex);

if ((pte & AARCH64_ATTR_DESCR_MASK) != AARCH64_L3_PAGE)
			continue;

va = vm->hdr.kernbase + (pteindex << AARCH64_L3_SHIFT);
		pa = pte & ~AARCH64_ATTR_MASK;
		dva = vm->hdr.dmapbase + pa;
		if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
		    _aarch64_entry_to_prot(pte), AARCH64_PAGE_SIZE, 0)) {
			goto out;
		}
	}

while (_kvm_bitmap_next(&bm, &bmindex)) {
		pa = _kvm_bit_id_pa(kd, bmindex, AARCH64_PAGE_SIZE);
		if (pa == _KVM_PA_INVALID)
			break;
		dva = vm->hdr.dmapbase + pa;
		if (vm->hdr.dmapend < (dva + AARCH64_PAGE_SIZE))
			break;
		va = 0;
		prot = VM_PROT_READ | VM_PROT_WRITE;
		if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
		    prot, AARCH64_PAGE_SIZE, 0)) {
			goto out;
		}
	}
	ret = 1;

out:
	_kvm_bitmap_deinit(&bm);
	return (ret);
}

static struct kvm_arch kvm_aarch64_minidump = {
	.ka_probe = _aarch64_minidump_probe,
	.ka_initvtop = _aarch64_minidump_initvtop,
	.ka_freevtop = _aarch64_minidump_freevtop,
	.ka_kvatop = _aarch64_minidump_kvatop,
	.ka_native = _aarch64_native,
	.ka_walk_pages = _aarch64_minidump_walk_pages,
};

KVM_ARCH(kvm_aarch64_minidump);

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Editing: kvm_minidump_aarch64.c

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