1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2002 Marcel Moolenaar
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include "opt_watchdog.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/conf.h>
35 #include <sys/sysctl.h>
36 #include <sys/kernel.h>
37 #include <sys/proc.h>
38 #include <sys/kerneldump.h>
39
40 #include <vm/vm.h>
41 #include <vm/pmap.h>
42 #include <machine/dump.h>
43 #include <machine/elf.h>
44 #include <machine/md_var.h>
45 #include <machine/pcb.h>
46 #include <machine/armreg.h>
47 #include <machine/vmparam.h> /* For KERNVIRTADDR */
48
49 int do_minidump = 1;
50 SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0,
51 "Enable mini crash dumps");
52
53 void
dumpsys_wbinv_all(void)54 dumpsys_wbinv_all(void)
55 {
56
57 /*
58 * Make sure we write coherent data. Note that in the SMP case this
59 * only operates on the L1 cache of the current CPU, but all other CPUs
60 * have already been stopped, and their flush/invalidate was done as
61 * part of stopping.
62 */
63 dcache_wbinv_poc_all();
64 }
65
66 void
dumpsys_map_chunk(vm_paddr_t pa,size_t chunk,void ** va)67 dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va)
68 {
69 vm_paddr_t a;
70 int i;
71
72 for (i = 0; i < chunk; i++) {
73 a = pa + i * PAGE_SIZE;
74 *va = pmap_kenter_temporary(trunc_page(a), i);
75 }
76 }
77
78 /*
79 * Add a header to be used by libkvm to get the va to pa delta
80 */
81 int
dumpsys_write_aux_headers(struct dumperinfo * di)82 dumpsys_write_aux_headers(struct dumperinfo *di)
83 {
84 Elf_Phdr phdr;
85 int error;
86
87 bzero(&phdr, sizeof(phdr));
88 phdr.p_type = PT_DUMP_DELTA;
89 phdr.p_flags = PF_R; /* XXX */
90 phdr.p_offset = 0;
91 phdr.p_vaddr = KERNVIRTADDR;
92 phdr.p_paddr = pmap_kextract(KERNVIRTADDR);
93 phdr.p_filesz = 0;
94 phdr.p_memsz = 0;
95 phdr.p_align = PAGE_SIZE;
96
97 error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr));
98 return (error);
99 }
100