1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 31 32 #include "opt_watchdog.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/sysctl.h> 38 #include <sys/kernel.h> 39 #include <sys/proc.h> 40 #include <sys/kerneldump.h> 41 42 #include <vm/vm.h> 43 #include <vm/pmap.h> 44 #include <machine/dump.h> 45 #include <machine/elf.h> 46 #include <machine/md_var.h> 47 #include <machine/pcb.h> 48 #include <machine/armreg.h> 49 #include <machine/vmparam.h> /* For KERNVIRTADDR */ 50 51 int do_minidump = 1; 52 SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0, 53 "Enable mini crash dumps"); 54 55 void 56 dumpsys_wbinv_all(void) 57 { 58 59 /* 60 * Make sure we write coherent data. Note that in the SMP case this 61 * only operates on the L1 cache of the current CPU, but all other CPUs 62 * have already been stopped, and their flush/invalidate was done as 63 * part of stopping. 64 */ 65 dcache_wbinv_poc_all(); 66 } 67 68 void 69 dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va) 70 { 71 vm_paddr_t a; 72 int i; 73 74 for (i = 0; i < chunk; i++) { 75 a = pa + i * PAGE_SIZE; 76 *va = pmap_kenter_temporary(trunc_page(a), i); 77 } 78 } 79 80 /* 81 * Add a header to be used by libkvm to get the va to pa delta 82 */ 83 int 84 dumpsys_write_aux_headers(struct dumperinfo *di) 85 { 86 Elf_Phdr phdr; 87 int error; 88 89 bzero(&phdr, sizeof(phdr)); 90 phdr.p_type = PT_DUMP_DELTA; 91 phdr.p_flags = PF_R; /* XXX */ 92 phdr.p_offset = 0; 93 phdr.p_vaddr = KERNVIRTADDR; 94 phdr.p_paddr = pmap_kextract(KERNVIRTADDR); 95 phdr.p_filesz = 0; 96 phdr.p_memsz = 0; 97 phdr.p_align = PAGE_SIZE; 98 99 error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr)); 100 return (error); 101 } 102