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. 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 * @(#)kvm_private.h 8.1 (Berkeley) 6/4/93 34 * $FreeBSD$ 35 */ 36 37 #include <sys/endian.h> 38 #include <sys/linker_set.h> 39 #include <gelf.h> 40 41 struct kvm_arch { 42 int (*ka_probe)(kvm_t *); 43 int (*ka_initvtop)(kvm_t *); 44 void (*ka_freevtop)(kvm_t *); 45 int (*ka_kvatop)(kvm_t *, kvaddr_t, off_t *); 46 int (*ka_native)(kvm_t *); 47 }; 48 49 #define KVM_ARCH(ka) DATA_SET(kvm_arch, ka) 50 51 struct __kvm { 52 struct kvm_arch *arch; 53 /* 54 * a string to be prepended to error messages 55 * provided for compatibility with sun's interface 56 * if this value is null, errors are saved in errbuf[] 57 */ 58 const char *program; 59 char *errp; /* XXX this can probably go away */ 60 char errbuf[_POSIX2_LINE_MAX]; 61 #define ISALIVE(kd) ((kd)->vmfd >= 0) 62 int pmfd; /* physical memory file (or crashdump) */ 63 int vmfd; /* virtual memory file (-1 if crashdump) */ 64 int nlfd; /* namelist file (e.g., /kernel) */ 65 GElf_Ehdr nlehdr; /* ELF file header for namelist file */ 66 int (*resolve_symbol)(const char *, kvaddr_t *); 67 struct kinfo_proc *procbase; 68 char *argspc; /* (dynamic) storage for argv strings */ 69 int arglen; /* length of the above */ 70 char **argv; /* (dynamic) storage for argv pointers */ 71 int argc; /* length of above (not actual # present) */ 72 char *argbuf; /* (dynamic) temporary storage */ 73 /* 74 * Kernel virtual address translation state. This only gets filled 75 * in for dead kernels; otherwise, the running kernel (i.e. kmem) 76 * will do the translations for us. It could be big, so we 77 * only allocate it if necessary. 78 */ 79 struct vmstate *vmst; 80 int rawdump; /* raw dump format */ 81 int writable; /* physical memory is writable */ 82 83 int vnet_initialized; /* vnet fields set up */ 84 kvaddr_t vnet_start; /* start of kernel's vnet region */ 85 kvaddr_t vnet_stop; /* stop of kernel's vnet region */ 86 kvaddr_t vnet_current; /* vnet we're working with */ 87 kvaddr_t vnet_base; /* vnet base of current vnet */ 88 89 /* 90 * Dynamic per-CPU kernel memory. We translate symbols, on-demand, 91 * to the data associated with dpcpu_curcpu, set with 92 * kvm_dpcpu_setcpu(). 93 */ 94 int dpcpu_initialized; /* dpcpu fields set up */ 95 kvaddr_t dpcpu_start; /* start of kernel's dpcpu region */ 96 kvaddr_t dpcpu_stop; /* stop of kernel's dpcpu region */ 97 u_int dpcpu_maxcpus; /* size of base array */ 98 uintptr_t *dpcpu_off; /* base array, indexed by CPU ID */ 99 u_int dpcpu_curcpu; /* CPU we're currently working with */ 100 kvaddr_t dpcpu_curoff; /* dpcpu base of current CPU */ 101 102 /* Page table lookup structures. */ 103 uint64_t *pt_map; 104 size_t pt_map_size; 105 off_t pt_sparse_off; 106 uint64_t pt_sparse_size; 107 uint32_t *pt_popcounts; 108 unsigned int pt_page_size; 109 unsigned int pt_word_size; 110 }; 111 112 /* Page table lookup constants. */ 113 #define POPCOUNT_BITS 1024 114 #define BITS_IN(v) (sizeof(v) * NBBY) 115 #define POPCOUNTS_IN(v) (POPCOUNT_BITS / BITS_IN(v)) 116 117 /* 118 * Functions used internally by kvm, but across kvm modules. 119 */ 120 static inline uint32_t 121 _kvm32toh(kvm_t *kd, uint32_t val) 122 { 123 124 if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB) 125 return (le32toh(val)); 126 else 127 return (be32toh(val)); 128 } 129 130 static inline uint64_t 131 _kvm64toh(kvm_t *kd, uint64_t val) 132 { 133 134 if (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB) 135 return (le64toh(val)); 136 else 137 return (be64toh(val)); 138 } 139 140 void _kvm_err(kvm_t *kd, const char *program, const char *fmt, ...) 141 __printflike(3, 4); 142 void _kvm_freeprocs(kvm_t *kd); 143 void *_kvm_malloc(kvm_t *kd, size_t); 144 int _kvm_nlist(kvm_t *, struct kvm_nlist *, int); 145 void *_kvm_realloc(kvm_t *kd, void *, size_t); 146 void _kvm_syserr (kvm_t *kd, const char *program, const char *fmt, ...) 147 __printflike(3, 4); 148 int _kvm_vnet_selectpid(kvm_t *, pid_t); 149 int _kvm_vnet_initialized(kvm_t *, int); 150 kvaddr_t _kvm_vnet_validaddr(kvm_t *, kvaddr_t); 151 int _kvm_dpcpu_initialized(kvm_t *, int); 152 kvaddr_t _kvm_dpcpu_validaddr(kvm_t *, kvaddr_t); 153 int _kvm_probe_elf_kernel(kvm_t *, int, int); 154 int _kvm_is_minidump(kvm_t *); 155 int _kvm_read_core_phdrs(kvm_t *, size_t *, GElf_Phdr **); 156 int _kvm_pt_init(kvm_t *, size_t, off_t, off_t, int, int); 157 off_t _kvm_pt_find(kvm_t *, uint64_t); 158