1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 2012 by Delphix. All rights reserved. 29 */ 30 31 /* 32 * This is the basis for drti.o which dt_link.c links into the object file 33 * generated by dtrace(8) -G by default (note that -xlazyload disables this). 34 */ 35 36 #include <dlfcn.h> 37 #include <stdlib.h> 38 #include <fcntl.h> 39 #include <unistd.h> 40 41 #include <dlink.h> 42 43 static int gen; /* DOF helper generation */ 44 extern dof_hdr_t __SUNW_dof; /* DOF defined in the .SUNW_dof section */ 45 46 #pragma init(dtrace_drti_init) 47 static void 48 dtrace_drti_init(void) 49 { 50 Link_map *lmp; 51 Lmid_t lmid; 52 53 dtrace_link_init(); 54 55 if (dlinfo(RTLD_SELF, RTLD_DI_LINKMAP, &lmp) == -1 || lmp == NULL) { 56 dprintf(1, "couldn't discover module name or address\n"); 57 return; 58 } 59 60 if (dlinfo(RTLD_SELF, RTLD_DI_LMID, &lmid) == -1) { 61 dprintf(1, "couldn't discover link map ID\n"); 62 return; 63 } 64 65 dtrace_link_dof(&__SUNW_dof, lmid, lmp->l_name, lmp->l_addr); 66 } 67 68 #pragma fini(dtrace_drti_fini) 69 static void 70 dtrace_drti_fini(void) 71 { 72 int fd; 73 74 if ((fd = open64(devname, O_RDWR)) < 0) { 75 dprintf(1, "failed to open helper device %s", devname); 76 return; 77 } 78 79 if ((gen = ioctl(fd, DTRACEHIOC_REMOVE, gen)) == -1) 80 dprintf(1, "DTrace ioctl failed to remove DOF (%d)\n", gen); 81 else 82 dprintf(1, "DTrace ioctl removed DOF (%d)\n", gen); 83 84 (void) close(fd); 85 } 86