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/conf.h> 34 #include <sys/kerneldump.h> 35 #include <sys/sysctl.h> 36 #include <sys/systm.h> 37 #include <vm/vm.h> 38 #include <vm/pmap.h> 39 40 #ifdef __amd64__ 41 #include <machine/elf.h> 42 #include <machine/vmparam.h> 43 #include <machine/md_var.h> 44 #include <machine/dump.h> 45 #endif 46 47 int do_minidump = 1; 48 SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0, 49 "Enable mini crash dumps"); 50 51 void 52 dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va) 53 { 54 int i; 55 vm_paddr_t a; 56 57 for (i = 0; i < chunk; i++) { 58 a = pa + i * PAGE_SIZE; 59 *va = pmap_kenter_temporary(trunc_page(a), i); 60 } 61 } 62 63 #ifdef __amd64__ 64 int 65 dumpsys_write_aux_headers(struct dumperinfo *di) 66 { 67 Elf_Phdr phdr; 68 69 phdr.p_type = PT_DUMP_DELTA; 70 phdr.p_flags = PF_R; 71 phdr.p_offset = 0; 72 phdr.p_vaddr = KERNBASE; 73 phdr.p_paddr = kernphys; 74 phdr.p_filesz = 0; 75 phdr.p_memsz = 0; 76 phdr.p_align = KERNLOAD; 77 78 return (dumpsys_buf_write(di, (char *)&phdr, sizeof(phdr))); 79 } 80 #endif 81