1 /*- 2 * Copyright (c) 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 /* 39 * Sun3 machine dependent routines for kvm. Hopefully, the forthcoming 40 * vm code will one day obsolete this module. Furthermore, I hope it 41 * gets here soon, because this basically is an error stub! (sorry) 42 */ 43 44 #include <sys/param.h> 45 #include <sys/user.h> 46 #include <sys/proc.h> 47 #include <sys/stat.h> 48 #include <unistd.h> 49 #include <nlist.h> 50 #include <kvm.h> 51 52 #include <vm/vm.h> 53 #include <vm/vm_param.h> 54 55 #include <limits.h> 56 #include <db.h> 57 58 #include "kvm_private.h" 59 60 struct vmstate { 61 u_long end; 62 }; 63 64 void 65 _kvm_freevtop(kd) 66 kvm_t *kd; 67 { 68 if (kd->vmst != 0) 69 free(kd->vmst); 70 } 71 72 int 73 _kvm_initvtop(kd) 74 kvm_t *kd; 75 { 76 register int i; 77 register int off; 78 register struct vmstate *vm; 79 struct stat st; 80 struct nlist nlist[2]; 81 82 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 83 if (vm == 0) 84 return (-1); 85 86 kd->vmst = vm; 87 88 if (fstat(kd->pmfd, &st) < 0) 89 return (-1); 90 91 /* Get end of kernel address */ 92 nlist[0].n_name = "_end"; 93 nlist[1].n_name = 0; 94 if (kvm_nlist(kd, nlist) != 0) { 95 _kvm_err(kd, kd->program, "pmap_stod: no such symbol"); 96 return (-1); 97 } 98 vm->end = (u_long)nlist[0].n_value; 99 100 return (0); 101 } 102 103 #define VA_OFF(va) (va & (NBPG - 1)) 104 105 /* 106 * Translate a kernel virtual address to a physical address using the 107 * mapping information in kd->vm. Returns the result in pa, and returns 108 * the number of bytes that are contiguously available from this 109 * physical address. This routine is used only for crashdumps. 110 */ 111 int 112 _kvm_kvatop(kd, va, pa) 113 kvm_t *kd; 114 u_long va; 115 u_long *pa; 116 { 117 register int end; 118 119 if (va < KERNBASE) { 120 _kvm_err(kd, 0, "invalid address (%x<%x)", va, KERNBASE); 121 return (0); 122 } 123 124 end = kd->vmst->end; 125 if (va >= end) { 126 _kvm_err(kd, 0, "invalid address (%x>=%x)", va, end); 127 return (0); 128 } 129 130 *pa = (va - KERNBASE); 131 return (end - va); 132 } 133