1 /* $OpenBSD: kvm_sparc64.c,v 1.10 2013/11/01 15:57:56 deraadt Exp $ */ 2 /* $NetBSD: kvm_sparc64.c,v 1.7 2001/08/05 03:33:15 matt Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software developed by the Computer Systems 9 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 10 * BG 91-66 and contributed to Berkeley. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /* 38 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 39 * vm code will one day obsolete this module. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/exec.h> 44 #include <sys/proc.h> 45 #include <sys/stat.h> 46 #include <sys/core.h> 47 #include <sys/kcore.h> 48 #include <unistd.h> 49 #include <nlist.h> 50 #include <kvm.h> 51 52 #include <uvm/uvm_extern.h> 53 54 #include <machine/vmparam.h> 55 #include <machine/pmap.h> 56 #include <machine/kcore.h> 57 58 #include <limits.h> 59 #include <db.h> 60 61 #include "kvm_private.h" 62 63 /* 64 * UltraSPARC T1 & T2 implement only a 40-bit real address range, just 65 * like older UltraSPARC CPUs. 66 */ 67 #define TLB_PA_MASK SUN4U_TLB_PA_MASK 68 69 int _kvm_kvatop(kvm_t *, u_long, u_long *); 70 71 void 72 _kvm_freevtop(kvm_t *kd) 73 { 74 if (kd->vmst != NULL) { 75 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 76 kd->vmst = NULL; 77 } 78 } 79 80 /* 81 * Prepare for translation of kernel virtual addresses into offsets 82 * into crash dump files. We use the MMU specific goop written at the 83 * front of the crash dump by pmap_dumpmmu(). 84 * 85 * We should read in and cache the ksegs here to speed up operations... 86 */ 87 int 88 _kvm_initvtop(kvm_t *kd) 89 { 90 return (0); 91 } 92 93 /* 94 * Translate a kernel virtual address to a physical address using the 95 * mapping information in kd->vm. Returns the result in pa, and returns 96 * the number of bytes that are contiguously available from this 97 * physical address. This routine is used only for crashdumps. 98 */ 99 int 100 _kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa) 101 { 102 cpu_kcore_hdr_t *cpup = kd->cpu_data; 103 u_long kernbase = cpup->kernbase; 104 uint64_t *pseg, *pdir, *ptbl; 105 int64_t data; 106 107 if (va < kernbase) 108 goto lose; 109 110 /* Handle the wired 4MB TTEs */ 111 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 112 u_long vaddr; 113 114 vaddr = va - cpup->ktextbase; 115 *pa = cpup->ktextp + vaddr; 116 return (cpup->ktextsz - vaddr); 117 } 118 119 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 120 u_long vaddr; 121 122 vaddr = va - cpup->kdatabase; 123 *pa = cpup->kdatap + vaddr; 124 return (cpup->kdatasz - vaddr); 125 } 126 127 128 /* 129 * Parse kernel page table. 130 */ 131 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 132 if (pread(kd->pmfd, &pdir, sizeof(pdir), 133 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) != sizeof(pdir)) { 134 _kvm_syserr(kd, 0, "could not read L1 PTE"); 135 goto lose; 136 } 137 138 if (!pdir) { 139 _kvm_err(kd, 0, "invalid L1 PTE"); 140 goto lose; 141 } 142 143 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 144 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) != sizeof(ptbl)) { 145 _kvm_syserr(kd, 0, "could not read L2 PTE"); 146 goto lose; 147 } 148 149 if (!ptbl) { 150 _kvm_err(kd, 0, "invalid L2 PTE"); 151 goto lose; 152 } 153 154 if (pread(kd->pmfd, &data, sizeof(data), 155 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) != sizeof(data)) { 156 _kvm_syserr(kd, 0, "could not read TTE"); 157 goto lose; 158 } 159 160 if (data >= 0) { 161 _kvm_err(kd, 0, "invalid L2 TTE"); 162 goto lose; 163 } 164 165 /* 166 * Calculate page offsets and things. 167 * 168 * XXXX -- We could support multiple page sizes. 169 */ 170 va = va & (kd->nbpg - 1); 171 data &= TLB_PA_MASK; 172 *pa = data + va; 173 174 /* 175 * Parse and translate our TTE. 176 */ 177 return (kd->nbpg - va); 178 179 lose: 180 *pa = -1; 181 _kvm_err(kd, 0, "invalid address (%lx)", va); 182 return (0); 183 } 184 185 186 /* 187 * Translate a physical address to a file-offset in the crash-dump. 188 */ 189 off_t 190 _kvm_pa2off(kvm_t *kd, paddr_t pa) 191 { 192 cpu_kcore_hdr_t *cpup = kd->cpu_data; 193 phys_ram_seg_t *mp; 194 off_t off; 195 int nmem; 196 197 /* 198 * Layout of CPU segment: 199 * cpu_kcore_hdr_t; 200 * [alignment] 201 * phys_ram_seg_t[cpup->nmemseg]; 202 */ 203 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 204 off = 0; 205 206 /* Translate (sparse) pfnum to (packed) dump offset */ 207 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 208 if (mp->start <= pa && pa < mp->start + mp->size) 209 break; 210 off += mp->size; 211 } 212 if (nmem < 0) { 213 _kvm_err(kd, 0, "invalid address (%lx)", pa); 214 return (-1); 215 } 216 217 return (kd->dump_off + off + pa - mp->start); 218 } 219