1 /* $NetBSD: kvm_private.h,v 1.20 2011/09/12 21:11:32 christos 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)kvm_private.h 8.1 (Berkeley) 6/4/93 36 */ 37 38 struct __kvm { 39 /* 40 * a string to be prepended to error messages 41 * provided for compatibility with sun's interface 42 * if this value is null, errors are saved in errbuf[] 43 */ 44 const char *program; 45 char *errp; /* XXX this can probably go away */ 46 char errbuf[_POSIX2_LINE_MAX]; 47 int pmfd; /* physical memory file (or crash dump) */ 48 int vmfd; /* virtual memory file (-1 if crash dump) */ 49 int swfd; /* swap file (e.g., /dev/drum) */ 50 int nlfd; /* namelist file (e.g., /vmunix) */ 51 char alive; /* live kernel? */ 52 struct kinfo_proc *procbase; 53 struct kinfo_proc2 *procbase2; 54 struct kinfo_lwp *lwpbase; 55 size_t procbase_len; 56 size_t procbase2_len; 57 size_t lwpbase_len; 58 u_long usrstack; /* address of end of user stack */ 59 u_long min_uva, max_uva; /* min/max user virtual address */ 60 int nbpg; /* page size */ 61 char *swapspc; /* (dynamic) storage for swapped pages */ 62 char *argspc, *argbuf; /* (dynamic) storage for argv strings */ 63 size_t argspc_len; /* length of the above */ 64 char **argv; /* (dynamic) storage for argv pointers */ 65 int argc; /* length of above (not actual # present) */ 66 67 /* 68 * Header structures for kernel dumps. Only gets filled in for 69 * dead kernels. 70 */ 71 struct kcore_hdr *kcore_hdr; 72 size_t cpu_dsize; 73 void *cpu_data; 74 off_t dump_off; /* Where the actual dump starts */ 75 76 /* 77 * Kernel virtual address translation state. This only gets filled 78 * in for dead kernels; otherwise, the running kernel (i.e. kmem) 79 * will do the translations for us. It could be big, so we 80 * only allocate it if necessary. 81 */ 82 struct vmstate *vmst; /* XXX: should become obsoleted */ 83 /* 84 * These kernel variables are used for looking up user addresses, 85 * and are cached for efficiency. 86 */ 87 struct pglist *vm_page_buckets; 88 int vm_page_hash_mask; 89 /* Buffer for raw disk I/O. */ 90 size_t fdalign; 91 uint8_t *iobuf; 92 size_t iobufsz; 93 char kernelname[MAXPATHLEN]; 94 }; 95 96 /* Levels of aliveness */ 97 #define KVM_ALIVE_DEAD 0 /* dead, working from core file */ 98 #define KVM_ALIVE_FILES 1 /* alive, working from open kmem/drum */ 99 #define KVM_ALIVE_SYSCTL 2 /* alive, sysctl-type calls only */ 100 101 #define ISALIVE(kd) ((kd)->alive != KVM_ALIVE_DEAD) 102 #define ISKMEM(kd) ((kd)->alive == KVM_ALIVE_FILES) 103 #define ISSYSCTL(kd) ((kd)->alive == KVM_ALIVE_SYSCTL || ISKMEM(kd)) 104 105 /* 106 * Functions used internally by kvm, but across kvm modules. 107 */ 108 void _kvm_err(kvm_t *, const char *, const char *, ...) 109 __attribute__((__format__(__printf__, 3, 4))); 110 int _kvm_dump_mkheader(kvm_t *, kvm_t *); 111 void _kvm_freeprocs(kvm_t *); 112 void _kvm_freevtop(kvm_t *); 113 int _kvm_mdopen(kvm_t *); 114 int _kvm_initvtop(kvm_t *); 115 int _kvm_kvatop(kvm_t *, vaddr_t, paddr_t *); 116 void *_kvm_malloc(kvm_t *, size_t); 117 off_t _kvm_pa2off(kvm_t *, paddr_t); 118 void *_kvm_realloc(kvm_t *, void *, size_t); 119 void _kvm_syserr(kvm_t *, const char *, const char *, ...) 120 __attribute__((__format__(__printf__, 3, 4))); 121 ssize_t _kvm_pread(kvm_t *, int, void *, size_t, off_t); 122 123 #define KREAD(kd, addr, obj) \ 124 (kvm_read(kd, addr, (obj), sizeof(*obj)) != sizeof(*obj)) 125 126 #define KVM_ALLOC(kd, member, size) \ 127 do { \ 128 if (kd->member == NULL) \ 129 kd->member = _kvm_malloc(kd, kd->member ## _len = size); \ 130 else if (kd->member ## _len < size) \ 131 kd->member = _kvm_realloc(kd, kd->member, \ 132 kd->member ## _len = size); \ 133 if (kd->member == NULL) { \ 134 kd->member ## _len = 0; \ 135 return (NULL); \ 136 } \ 137 } while (/*CONSTCOND*/0) 138