kvm_sparc64.c revision 1.7
1 /* $NetBSD: kvm_sparc64.c,v 1.7 2001/08/05 03:33:15 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software developed by the Computer Systems 8 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 9 * BG 91-66 and contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 #if defined(LIBC_SCCS) && !defined(lint) 42 #if 0 43 static char sccsid[] = "@(#)kvm_sparc.c 8.1 (Berkeley) 6/4/93"; 44 #else 45 __RCSID("$NetBSD: kvm_sparc64.c,v 1.7 2001/08/05 03:33:15 matt Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * Sparc machine dependent routines for kvm. Hopefully, the forthcoming 51 * vm code will one day obsolete this module. 52 */ 53 54 #include <sys/param.h> 55 #include <sys/exec.h> 56 #include <sys/user.h> 57 #include <sys/proc.h> 58 #include <sys/stat.h> 59 #include <sys/core.h> 60 #include <sys/kcore.h> 61 #include <unistd.h> 62 #include <nlist.h> 63 #include <kvm.h> 64 65 #include <uvm/uvm_extern.h> 66 67 #include <machine/pmap.h> 68 #include <machine/kcore.h> 69 70 #include <limits.h> 71 #include <db.h> 72 73 #include "kvm_private.h" 74 75 int _kvm_kvatop __P((kvm_t *, u_long, u_long *)); 76 77 void 78 _kvm_freevtop(kd) 79 kvm_t *kd; 80 { 81 if (kd->vmst != 0) { 82 _kvm_err(kd, kd->program, "_kvm_freevtop: internal error"); 83 kd->vmst = 0; 84 } 85 } 86 87 /* 88 * Prepare for translation of kernel virtual addresses into offsets 89 * into crash dump files. We use the MMU specific goop written at the 90 * front of the crash dump by pmap_dumpmmu(). 91 * 92 * We should read in and cache the ksegs here to speed up operations... 93 */ 94 int 95 _kvm_initvtop(kd) 96 kvm_t *kd; 97 { 98 kd->nbpg = 0x2000; 99 100 return (0); 101 } 102 103 /* 104 * Translate a kernel virtual address to a physical address using the 105 * mapping information in kd->vm. Returns the result in pa, and returns 106 * the number of bytes that are contiguously available from this 107 * physical address. This routine is used only for crashdumps. 108 */ 109 int 110 _kvm_kvatop(kd, va, pa) 111 kvm_t *kd; 112 u_long va; 113 u_long *pa; 114 { 115 cpu_kcore_hdr_t *cpup = kd->cpu_data; 116 u_long kernbase = cpup->kernbase; 117 uint64_t *pseg, *pdir, *ptbl; 118 int64_t data; 119 120 if (va < kernbase) 121 goto lose; 122 123 /* Handle the wired 4MB TTEs */ 124 if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) { 125 u_long vaddr; 126 127 vaddr = va - cpup->ktextbase; 128 *pa = cpup->ktextp + vaddr; 129 return (cpup->ktextsz - vaddr); 130 } 131 132 if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) { 133 u_long vaddr; 134 135 vaddr = va - cpup->kdatabase; 136 *pa = cpup->kdatap + vaddr; 137 return (cpup->kdatasz - vaddr); 138 } 139 140 141 /* 142 * Parse kernel page table. 143 */ 144 pseg = (uint64_t *)(u_long)cpup->segmapoffset; 145 if (pread(kd->pmfd, &pdir, sizeof(pdir), 146 _kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) 147 != sizeof(pdir)) { 148 _kvm_syserr(kd, 0, "could not read L1 PTE"); 149 goto lose; 150 } 151 152 if (!pdir) { 153 _kvm_err(kd, 0, "invalid L1 PTE"); 154 goto lose; 155 } 156 157 if (pread(kd->pmfd, &ptbl, sizeof(ptbl), 158 _kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) 159 != sizeof(ptbl)) { 160 _kvm_syserr(kd, 0, "could not read L2 PTE"); 161 goto lose; 162 } 163 164 if (!ptbl) { 165 _kvm_err(kd, 0, "invalid L2 PTE"); 166 goto lose; 167 } 168 169 if (pread(kd->pmfd, &data, sizeof(data), 170 _kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) 171 != sizeof(data)) { 172 _kvm_syserr(kd, 0, "could not read TTE"); 173 goto lose; 174 } 175 176 if (data >= 0) { 177 _kvm_err(kd, 0, "invalid L2 TTE"); 178 goto lose; 179 } 180 181 /* 182 * Calculate page offsets and things. 183 * 184 * XXXX -- We could support multiple page sizes. 185 */ 186 va = va & (kd->nbpg - 1); 187 data &= TLB_PA_MASK; 188 *pa = data + va; 189 190 /* 191 * Parse and trnslate our TTE. 192 */ 193 194 return (kd->nbpg - va); 195 196 lose: 197 *pa = -1; 198 _kvm_err(kd, 0, "invalid address (%lx)", va); 199 return (0); 200 } 201 202 203 /* 204 * Translate a physical address to a file-offset in the crash-dump. 205 */ 206 off_t 207 _kvm_pa2off(kd, pa) 208 kvm_t *kd; 209 u_long pa; 210 { 211 cpu_kcore_hdr_t *cpup = kd->cpu_data; 212 phys_ram_seg_t *mp; 213 off_t off; 214 int nmem; 215 216 /* 217 * Layout of CPU segment: 218 * cpu_kcore_hdr_t; 219 * [alignment] 220 * phys_ram_seg_t[cpup->nmemseg]; 221 */ 222 mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset); 223 off = 0; 224 225 /* Translate (sparse) pfnum to (packed) dump offset */ 226 for (nmem = cpup->nmemseg; --nmem >= 0; mp++) { 227 if (mp->start <= pa && pa < mp->start + mp->size) 228 break; 229 off += mp->size; 230 } 231 if (nmem < 0) { 232 _kvm_err(kd, 0, "invalid address (%lx)", pa); 233 return (-1); 234 } 235 236 return (kd->dump_off + off + pa - mp->start); 237 } 238 239 /* 240 * Machine-dependent initialization for ALL open kvm descriptors, 241 * not just those for a kernel crash dump. Some architectures 242 * have to deal with these NOT being constants! (i.e. m68k) 243 */ 244 int 245 _kvm_mdopen(kd) 246 kvm_t *kd; 247 { 248 u_long max_uva; 249 extern struct ps_strings *__ps_strings; 250 251 max_uva = (u_long) (__ps_strings + 1); 252 kd->usrstack = max_uva; 253 kd->max_uva = max_uva; 254 kd->min_uva = 0; 255 256 return (0); 257 } 258
Indexes created Thu Sep 25 08:09:54 GMT 2025