1 /* 2 * Copyright (c) 2004 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Joerg Sonnenberger <joerg@bec.de>. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/lib/libkcore/kcore.c,v 1.5 2005/01/31 16:50:33 joerg Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/fcntl.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <kcore.h> 43 #include <kvm.h> 44 #include <stdlib.h> 45 46 #include "kcore_private.h" 47 48 struct kcore_data kcore_global; 49 50 struct kcore_data * 51 kcore_open(const char *execfile, const char *corefile, char *errbuf) 52 { 53 struct kcore_data *kc; 54 55 kc = malloc(sizeof(*kc)); 56 if (kc == NULL) 57 return(NULL); 58 kc->kd = kvm_openfiles(execfile, corefile, NULL, O_RDONLY, errbuf); 59 if (kc->kd == NULL) { 60 free(kc); 61 return(NULL); 62 } 63 return(kc); 64 } 65 66 int 67 kcore_close(struct kcore_data *kc) 68 { 69 int retval; 70 71 if (kc == NULL) { 72 retval = kvm_close(kcore_global.kd); 73 return(retval); 74 } 75 76 retval = kvm_close(kc->kd); 77 free(kc); 78 return(retval); 79 } 80 81 int 82 kcore_get_generic(struct kcore_data *kc, struct nlist *nl, 83 void *data, size_t len) 84 { 85 if (kc == NULL) 86 kc = &kcore_global; 87 88 if (nl[0].n_value == 0) { 89 if ((kvm_nlist(kc->kd, nl) < 0) || (nl[0].n_value == 0)) { 90 errno = EOPNOTSUPP; 91 return(-1); 92 } 93 } 94 if (kvm_read(kc->kd, nl[0].n_value, data, len) != (int)len) { 95 warnx("cannot read %s: %s", nl[0].n_name, kvm_geterr(kc->kd)); 96 errno = EINVAL; 97 return(-1); 98 } 99 return(0); 100 } 101