1/*- 2 * Copyright (c) 2002 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/arm/arm/dump_machdep.c 327658 2018-01-07 00:04:13Z ian $"); 29 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 49int do_minidump = 1; 50SYSCTL_INT(_debug, OID_AUTO, minidump, CTLFLAG_RWTUN, &do_minidump, 0, 51 "Enable mini crash dumps"); 52 53void 54dumpsys_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#ifdef __XSCALE__ 65 xscale_cache_clean_minidata(); 66#endif 67} 68 69void 70dumpsys_map_chunk(vm_paddr_t pa, size_t chunk, void **va) 71{ 72 vm_paddr_t a; 73 int i; 74 75 for (i = 0; i < chunk; i++) { 76 a = pa + i * PAGE_SIZE; 77 *va = pmap_kenter_temporary(trunc_page(a), i); 78 } 79} 80 81/* 82 * Add a header to be used by libkvm to get the va to pa delta 83 */ 84int 85dumpsys_write_aux_headers(struct dumperinfo *di) 86{ 87 Elf_Phdr phdr; 88 int error; 89 90 bzero(&phdr, sizeof(phdr)); 91 phdr.p_type = PT_DUMP_DELTA; 92 phdr.p_flags = PF_R; /* XXX */ 93 phdr.p_offset = 0; 94 phdr.p_vaddr = KERNVIRTADDR; 95 phdr.p_paddr = pmap_kextract(KERNVIRTADDR); 96 phdr.p_filesz = 0; 97 phdr.p_memsz = 0; 98 phdr.p_align = PAGE_SIZE; 99 100 error = dumpsys_buf_write(di, (char*)&phdr, sizeof(phdr)); 101 return (error); 102} 103