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📄 autoconf.c(3.3 KB)
📄 bcopy_page.S(4.14 KB)
📄 bcopyinout.S(3.35 KB)
📄 bcopyinout_xscale.S(19.19 KB)
📄 blockio.S(13.19 KB)
📄 bus_space_asm_generic.S(5.43 KB)
📄 bus_space_base.c(4.8 KB)
📄 bus_space_generic.c(4.1 KB)
📄 busdma_machdep.c(50.91 KB)
📄 copystr.S(3.29 KB)
📄 cpu_asm-v6.S(7.88 KB)
📄 cpufunc.c(8.69 KB)
📄 cpufunc_asm.S(2.53 KB)
📄 cpufunc_asm_arm11x6.S(3.5 KB)
📄 cpufunc_asm_armv7.S(1.82 KB)
📄 cpufunc_asm_pj4b.S(3.47 KB)
📄 cpuinfo.c(14.82 KB)
📄 db_disasm.c(2.58 KB)
📄 db_interface.c(7.03 KB)
📄 db_trace.c(4.69 KB)
📄 debug_monitor.c(24 KB)
📄 disassem.c(20.16 KB)
📄 dump_machdep.c(2.95 KB)
📄 elf_machdep.c(8.8 KB)
📄 elf_note.S(1.56 KB)
📄 exception.S(14.21 KB)
📄 fiq.c(4.69 KB)
📄 fiq_subr.S(2.77 KB)
📄 fusu.S(5.61 KB)
📄 gdb_machdep.c(3.62 KB)
📄 genassym.c(5.29 KB)
📄 generic_timer.c(13.62 KB)
📄 gic.c(32.64 KB)
📄 gic.h(2.64 KB)
📄 gic_acpi.c(9.14 KB)
📄 gic_common.h(4.19 KB)
📄 gic_fdt.c(9.69 KB)
📄 hypervisor-stub.S(2.61 KB)
📄 identcpu-v6.c(10.16 KB)
📄 in_cksum.c(4.23 KB)
📄 in_cksum_arm.S(6.87 KB)
📄 locore-v6.S(14.28 KB)
📄 locore.S(1.63 KB)
📄 machdep.c(23.79 KB)
📄 machdep_boot.c(12.48 KB)
📄 machdep_intr.c(7.63 KB)
📄 machdep_kdb.c(3.77 KB)
📄 machdep_ptrace.c(8.1 KB)
📄 mem.c(5.03 KB)
📄 minidump_machdep.c(8.77 KB)
📄 mp_machdep.c(8.58 KB)
📄 mpcore_timer.c(15.71 KB)
📄 mpcore_timervar.h(2.03 KB)
📄 nexus.c(11.33 KB)
📄 nexusvar.h(1.54 KB)
📄 ofw_machdep.c(2.28 KB)
📄 pl190.c(7.63 KB)
📄 pl310.c(16.9 KB)
📄 platform.c(5.31 KB)
📄 platform_if.m(4.14 KB)
📄 platform_pl310_if.m(2.44 KB)
📄 pmap-v6.c(187.97 KB)
📄 pmu.c(3.98 KB)
📄 pmu.h(1.8 KB)
📄 pmu_fdt.c(5.87 KB)
📄 ptrace_machdep.c(1.89 KB)
📄 sc_machdep.c(2.21 KB)
📄 setcpsr.S(2.52 KB)
📄 setstack.s(3.16 KB)
📄 stack_machdep.c(2.65 KB)
📄 stdatomic.c(13.88 KB)
📄 support.S(51.78 KB)
📄 swtch-v6.S(13.07 KB)
📄 swtch.S(4.68 KB)
📄 sys_machdep.c(5.24 KB)
📄 syscall.c(5.54 KB)
📄 trap-v6.c(19.14 KB)
📄 uio_machdep.c(3.95 KB)
📄 undefined.c(9.07 KB)
📄 unwind.c(16.62 KB)
📄 vfp.c(9.1 KB)
📄 vm_machdep.c(8.38 KB)

Editing: minidump_machdep.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2006 Peter Wemm
 * Copyright (c) 2008 Semihalf, Grzegorz Bernacki
 * All rights reserved.
 *
 * 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 ``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 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/sys/i386/i386/minidump_machdep.c,v 1.6 2008/08/17 23:27:27
 */

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

#include "opt_watchdog.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/cons.h>
#include <sys/kernel.h>
#include <sys/kerneldump.h>
#include <sys/msgbuf.h>
#ifdef SW_WATCHDOG
#include <sys/watchdog.h>
#endif
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>
#include <vm/vm_phys.h>
#include <vm/vm_dumpset.h>
#include <vm/pmap.h>
#include <machine/atomic.h>
#include <machine/cpu.h>
#include <machine/elf.h>
#include <machine/md_var.h>
#include <machine/minidump.h>

CTASSERT(sizeof(struct kerneldumpheader) == 512);

static struct kerneldumpheader kdh;

/* Handle chunked writes. */
static size_t fragsz;
static void *dump_va;
static uint64_t counter, progress;

static int
is_dumpable(vm_paddr_t pa)
{
	vm_page_t m;
	int i;

if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
		return ((m->flags & PG_NODUMP) == 0);
	for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
		if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
			return (1);
	}
	return (0);
}

#define PG2MB(pgs) (((pgs) + (1 << 8) - 1) >> 8)

static int
blk_flush(struct dumperinfo *di)
{
	int error;

if (fragsz == 0)
		return (0);

error = dump_append(di, dump_va, 0, fragsz);
	fragsz = 0;
	return (error);
}

static int
blk_write(struct dumperinfo *di, char *ptr, vm_paddr_t pa, size_t sz)
{
	size_t len;
	int error, i, c;
	u_int maxdumpsz;

maxdumpsz = min(di->maxiosize, MAXDUMPPGS * PAGE_SIZE);
	if (maxdumpsz == 0)	/* seatbelt */
		maxdumpsz = PAGE_SIZE;
	error = 0;
	if (ptr != NULL && pa != 0) {
		printf("cant have both va and pa!\n");
		return (EINVAL);
	}
	if (pa != 0) {
		if ((sz % PAGE_SIZE) != 0) {
			printf("size not page aligned\n");
			return (EINVAL);
		}
		if ((pa & PAGE_MASK) != 0) {
			printf("address not page aligned\n");
			return (EINVAL);
		}
	}
	if (ptr != NULL) {
		/* Flush any pre-existing pa pages before a virtual dump. */
		error = blk_flush(di);
		if (error)
			return (error);
	}
	while (sz) {
		len = maxdumpsz - fragsz;
		if (len > sz)
			len = sz;
		counter += len;
		progress -= len;
		if (counter >> 22) {
			printf(" %lld", PG2MB(progress >> PAGE_SHIFT));
			counter &= (1<<22) - 1;
		}

#ifdef SW_WATCHDOG
		wdog_kern_pat(WD_LASTVAL);
#endif
		if (ptr) {
			error = dump_append(di, ptr, 0, len);
			if (error)
				return (error);
			ptr += len;
			sz -= len;
		} else {
			for (i = 0; i < len; i += PAGE_SIZE)
				dump_va = pmap_kenter_temporary(pa + i,
				    (i + fragsz) >> PAGE_SHIFT);
			fragsz += len;
			pa += len;
			sz -= len;
			if (fragsz == maxdumpsz) {
				error = blk_flush(di);
				if (error)
					return (error);
			}
		}

/* Check for user abort. */
		c = cncheckc();
		if (c == 0x03)
			return (ECANCELED);
		if (c != -1)
			printf(" (CTRL-C to abort) ");
	}

return (0);
}

/* A buffer for general use. Its size must be one page at least. */
static char dumpbuf[PAGE_SIZE] __aligned(sizeof(uint64_t));
CTASSERT(sizeof(dumpbuf) % sizeof(pt2_entry_t) == 0);

int
minidumpsys(struct dumperinfo *di)
{
	struct minidumphdr mdhdr;
	uint64_t dumpsize, *dump_avail_buf;
	uint32_t ptesize;
	uint32_t pa, prev_pa = 0, count = 0;
	vm_offset_t va;
	int error, i;
	char *addr;

/*
	 * Flush caches.  Note that in the SMP case this operates only on the
	 * current CPU's L1 cache.  Before we reach this point, code in either
	 * the system shutdown or kernel debugger has called stop_cpus() to stop
	 * all cores other than this one.  Part of the ARM handling of
	 * stop_cpus() is to call wbinv_all() on that core's local L1 cache.  So
	 * by time we get to here, all that remains is to flush the L1 for the
	 * current CPU, then the L2.
	 */
	dcache_wbinv_poc_all();

counter = 0;
	/* Walk page table pages, set bits in vm_page_dump */
	ptesize = 0;
	for (va = KERNBASE; va < kernel_vm_end; va += PAGE_SIZE) {
		pa = pmap_dump_kextract(va, NULL);
		if (pa != 0 && is_dumpable(pa))
			dump_add_page(pa);
		ptesize += sizeof(pt2_entry_t);
	}

/* Calculate dump size. */
	dumpsize = ptesize;
	dumpsize += round_page(msgbufp->msg_size);
	dumpsize += round_page(nitems(dump_avail) * sizeof(uint64_t));
	dumpsize += round_page(BITSET_SIZE(vm_page_dump_pages));
	VM_PAGE_DUMP_FOREACH(pa) {
		/* Clear out undumpable pages now if needed */
		if (is_dumpable(pa))
			dumpsize += PAGE_SIZE;
		else
			dump_drop_page(pa);
	}
	dumpsize += PAGE_SIZE;

progress = dumpsize;

/* Initialize mdhdr */
	bzero(&mdhdr, sizeof(mdhdr));
	strcpy(mdhdr.magic, MINIDUMP_MAGIC);
	mdhdr.version = MINIDUMP_VERSION;
	mdhdr.msgbufsize = msgbufp->msg_size;
	mdhdr.bitmapsize = round_page(BITSET_SIZE(vm_page_dump_pages));
	mdhdr.ptesize = ptesize;
	mdhdr.kernbase = KERNBASE;
	mdhdr.arch = __ARM_ARCH;
	mdhdr.mmuformat = MINIDUMP_MMU_FORMAT_V6;
	mdhdr.dumpavailsize = round_page(nitems(dump_avail) * sizeof(uint64_t));

dump_init_header(di, &kdh, KERNELDUMPMAGIC, KERNELDUMP_ARM_VERSION,
	    dumpsize);

error = dump_start(di, &kdh);
	if (error != 0)
		goto fail;

printf("Physical memory: %u MB\n", ptoa((uintmax_t)physmem) / 1048576);
	printf("Dumping %llu MB:", (long long)dumpsize >> 20);

/* Dump my header */
	bzero(dumpbuf, sizeof(dumpbuf));
	bcopy(&mdhdr, dumpbuf, sizeof(mdhdr));
	error = blk_write(di, dumpbuf, 0, PAGE_SIZE);
	if (error)
		goto fail;

/* Dump msgbuf up front */
	error = blk_write(di, (char *)msgbufp->msg_ptr, 0,
	    round_page(msgbufp->msg_size));
	if (error)
		goto fail;

/* Dump dump_avail.  Make a copy using 64-bit physical addresses. */
	_Static_assert(nitems(dump_avail) * sizeof(uint64_t) <= sizeof(dumpbuf),
	    "Large dump_avail not handled");
	bzero(dumpbuf, sizeof(dumpbuf));
	dump_avail_buf = (uint64_t *)dumpbuf;
	for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
		dump_avail_buf[i] = dump_avail[i];
		dump_avail_buf[i + 1] = dump_avail[i + 1];
	}
	error = blk_write(di, dumpbuf, 0, PAGE_SIZE);
	if (error)
		goto fail;

/* Dump bitmap */
	error = blk_write(di, (char *)vm_page_dump, 0,
	    round_page(BITSET_SIZE(vm_page_dump_pages)));
	if (error)
		goto fail;

/* Dump kernel page table pages */
	addr = dumpbuf;
	for (va = KERNBASE; va < kernel_vm_end; va += PAGE_SIZE) {
		pmap_dump_kextract(va, (pt2_entry_t *)addr);
		addr += sizeof(pt2_entry_t);
		if (addr == dumpbuf + sizeof(dumpbuf)) {
			error = blk_write(di, dumpbuf, 0, sizeof(dumpbuf));
			if (error != 0)
				goto fail;
			addr = dumpbuf;
		}
	}
	if (addr != dumpbuf) {
		error = blk_write(di, dumpbuf, 0, addr - dumpbuf);
		if (error != 0)
			goto fail;
	}

/* Dump memory chunks */
	VM_PAGE_DUMP_FOREACH(pa) {
		if (!count) {
			prev_pa = pa;
			count++;
		} else {
			if (pa == (prev_pa + count * PAGE_SIZE))
				count++;
			else {
				error = blk_write(di, NULL, prev_pa,
				    count * PAGE_SIZE);
				if (error)
					goto fail;
				count = 1;
				prev_pa = pa;
			}
		}
	}
	if (count) {
		error = blk_write(di, NULL, prev_pa, count * PAGE_SIZE);
		if (error)
			goto fail;
		count = 0;
		prev_pa = 0;
	}

error = blk_flush(di);
	if (error)
		goto fail;

error = dump_finish(di, &kdh);
	if (error != 0)
		goto fail;

printf("\nDump complete\n");
	return (0);

fail:
	if (error < 0)
		error = -error;

if (error == ECANCELED)
		printf("\nDump aborted\n");
	else if (error == E2BIG || error == ENOSPC) {
		printf("\nDump failed. Partition too small (about %lluMB were "
		    "needed this time).\n", (long long)dumpsize >> 20);
	} else
		printf("\n** DUMP FAILED (ERROR %d) **\n", error);
	return (error);
}

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Editing: minidump_machdep.c

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