kvm_sparc64.c revision 331722
1/*- 2 * Copyright (c) 1989, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software developed by the Computer Systems 6 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 7 * BG 91-66 and contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/11/lib/libkvm/kvm_sparc64.c 331722 2018-03-29 02:50:57Z eadler $"); 38 39#if defined(LIBC_SCCS) && !defined(lint) 40#if 0 41static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; 42#endif 43#endif /* LIBC_SCCS and not lint */ 44 45/* 46 * sparc64 machine dependent routines for kvm. 47 */ 48 49#include <sys/param.h> 50#include <kvm.h> 51#include <limits.h> 52#include <stdint.h> 53#include <stdlib.h> 54#include <unistd.h> 55 56#include "../../sys/sparc64/include/kerneldump.h" 57 58#include "kvm_private.h" 59#include "kvm_sparc64.h" 60 61struct vmstate { 62 off_t vm_tsb_off; 63 uint64_t vm_tsb_mask; 64 int vm_nregions; 65 struct sparc64_dump_reg *vm_regions; 66}; 67 68static int 69_sparc64_probe(kvm_t *kd) 70{ 71 72 return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_SPARCV9)); 73} 74 75static void 76_sparc64_freevtop(kvm_t *kd) 77{ 78 79 free(kd->vmst->vm_regions); 80 free(kd->vmst); 81 kd->vmst = NULL; 82} 83 84static int 85_sparc64_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size) 86{ 87 88 /* XXX This has to be a raw file read, kvm_read is virtual. */ 89 if (pread(kd->pmfd, buf, size, pos) != (ssize_t)size) { 90 _kvm_syserr(kd, kd->program, "_sparc64_read_phys: pread"); 91 return (0); 92 } 93 return (1); 94} 95 96static int 97_sparc64_reg_cmp(const void *a, const void *b) 98{ 99 const struct sparc64_dump_reg *ra, *rb; 100 101 ra = a; 102 rb = b; 103 if (ra->dr_pa < rb->dr_pa) 104 return (-1); 105 else if (ra->dr_pa >= rb->dr_pa + rb->dr_size) 106 return (1); 107 else 108 return (0); 109} 110 111#define KVM_OFF_NOTFOUND 0 112 113static off_t 114_sparc64_find_off(struct vmstate *vm, uint64_t pa, uint64_t size) 115{ 116 struct sparc64_dump_reg *reg, key; 117 vm_offset_t o; 118 119 key.dr_pa = pa; 120 reg = bsearch(&key, vm->vm_regions, vm->vm_nregions, 121 sizeof(*vm->vm_regions), _sparc64_reg_cmp); 122 if (reg == NULL) 123 return (KVM_OFF_NOTFOUND); 124 o = pa - reg->dr_pa; 125 if (o + size > reg->dr_size) 126 return (KVM_OFF_NOTFOUND); 127 return (reg->dr_offs + o); 128} 129 130static int 131_sparc64_initvtop(kvm_t *kd) 132{ 133 struct sparc64_dump_hdr hdr; 134 struct sparc64_dump_reg *regs; 135 struct vmstate *vm; 136 size_t regsz; 137 int i; 138 139 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 140 if (vm == NULL) { 141 _kvm_err(kd, kd->program, "cannot allocate vm"); 142 return (-1); 143 } 144 kd->vmst = vm; 145 146 if (!_sparc64_read_phys(kd, 0, &hdr, sizeof(hdr))) 147 goto fail_vm; 148 hdr.dh_hdr_size = be64toh(hdr.dh_hdr_size); 149 hdr.dh_tsb_pa = be64toh(hdr.dh_tsb_pa); 150 hdr.dh_tsb_size = be64toh(hdr.dh_tsb_size); 151 hdr.dh_tsb_mask = be64toh(hdr.dh_tsb_mask); 152 hdr.dh_nregions = be32toh(hdr.dh_nregions); 153 154 regsz = hdr.dh_nregions * sizeof(*regs); 155 regs = _kvm_malloc(kd, regsz); 156 if (regs == NULL) { 157 _kvm_err(kd, kd->program, "cannot allocate regions"); 158 goto fail_vm; 159 } 160 if (!_sparc64_read_phys(kd, sizeof(hdr), regs, regsz)) 161 goto fail_regs; 162 for (i = 0; i < hdr.dh_nregions; i++) { 163 regs[i].dr_pa = be64toh(regs[i].dr_pa); 164 regs[i].dr_size = be64toh(regs[i].dr_size); 165 regs[i].dr_offs = be64toh(regs[i].dr_offs); 166 } 167 qsort(regs, hdr.dh_nregions, sizeof(*regs), _sparc64_reg_cmp); 168 169 vm->vm_tsb_mask = hdr.dh_tsb_mask; 170 vm->vm_regions = regs; 171 vm->vm_nregions = hdr.dh_nregions; 172 vm->vm_tsb_off = _sparc64_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size); 173 if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) { 174 _kvm_err(kd, kd->program, "tsb not found in dump"); 175 goto fail_regs; 176 } 177 return (0); 178 179fail_regs: 180 free(regs); 181fail_vm: 182 free(vm); 183 return (-1); 184} 185 186static int 187_sparc64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa) 188{ 189 struct sparc64_tte tte; 190 off_t tte_off; 191 kvaddr_t vpn; 192 off_t pa_off; 193 kvaddr_t pg_off; 194 int rest; 195 196 pg_off = va & SPARC64_PAGE_MASK; 197 if (va >= SPARC64_MIN_DIRECT_ADDRESS) 198 pa_off = SPARC64_DIRECT_TO_PHYS(va) & ~SPARC64_PAGE_MASK; 199 else { 200 vpn = va >> SPARC64_PAGE_SHIFT; 201 tte_off = kd->vmst->vm_tsb_off + 202 ((vpn & kd->vmst->vm_tsb_mask) << SPARC64_TTE_SHIFT); 203 if (!_sparc64_read_phys(kd, tte_off, &tte, sizeof(tte))) 204 goto invalid; 205 tte.tte_vpn = be64toh(tte.tte_vpn); 206 tte.tte_data = be64toh(tte.tte_data); 207 if (!sparc64_tte_match(&tte, va)) 208 goto invalid; 209 pa_off = SPARC64_TTE_GET_PA(&tte); 210 } 211 rest = SPARC64_PAGE_SIZE - pg_off; 212 pa_off = _sparc64_find_off(kd->vmst, pa_off, rest); 213 if (pa_off == KVM_OFF_NOTFOUND) 214 goto invalid; 215 *pa = pa_off + pg_off; 216 return (rest); 217 218invalid: 219 _kvm_err(kd, 0, "invalid address (%jx)", (uintmax_t)va); 220 return (0); 221} 222 223static int 224_sparc64_native(kvm_t *kd __unused) 225{ 226 227#ifdef __sparc64__ 228 return (1); 229#else 230 return (0); 231#endif 232} 233 234static struct kvm_arch kvm_sparc64 = { 235 .ka_probe = _sparc64_probe, 236 .ka_initvtop = _sparc64_initvtop, 237 .ka_freevtop = _sparc64_freevtop, 238 .ka_kvatop = _sparc64_kvatop, 239 .ka_native = _sparc64_native, 240}; 241 242KVM_ARCH(kvm_sparc64); 243