1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 27*0Sstevel@tonic-gate 28*0Sstevel@tonic-gate /* LINTLIBRARY */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #include <link.h> 31*0Sstevel@tonic-gate #include <stdio.h> 32*0Sstevel@tonic-gate #include <stdlib.h> 33*0Sstevel@tonic-gate #include <unistd.h> 34*0Sstevel@tonic-gate #include <strings.h> 35*0Sstevel@tonic-gate #include <limits.h> 36*0Sstevel@tonic-gate #include "rtld.h" 37*0Sstevel@tonic-gate #include "_crle.h" 38*0Sstevel@tonic-gate #include "msg.h" 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* 41*0Sstevel@tonic-gate * This file provides the LD_AUDIT interfaces for libcrle.so.1, which are 42*0Sstevel@tonic-gate * called for one of two reasons: 43*0Sstevel@tonic-gate * 44*0Sstevel@tonic-gate * CRLE_AUD_DEPENDS 45*0Sstevel@tonic-gate * under this mode, the dependencies of the application are 46*0Sstevel@tonic-gate * gathered (similar to ldd(1)) and written back to the calling 47*0Sstevel@tonic-gate * process. 48*0Sstevel@tonic-gate * 49*0Sstevel@tonic-gate * CRLE_AUD_DLDUMP 50*0Sstevel@tonic-gate * under this mode, the LD_CONFIG file is read to determine which 51*0Sstevel@tonic-gate * objects are to be dldump()'ed. The memory range occupied by 52*0Sstevel@tonic-gate * the dumped images is written back to the calling process. 53*0Sstevel@tonic-gate * 54*0Sstevel@tonic-gate * Both of these interfaces are invoked via the crle(1) calling process. The 55*0Sstevel@tonic-gate * following environment variables are used to communicate between the two: 56*0Sstevel@tonic-gate * 57*0Sstevel@tonic-gate * CRLE_FD the file descriptor on which to communicate to the calling 58*0Sstevel@tonic-gate * process (used for CRLE_AUD_DEPENDS and CRLE_AUD_DUMP). 59*0Sstevel@tonic-gate * 60*0Sstevel@tonic-gate * CRLE_FLAGS this signals CRLE_AUD_DLDUMP mode, and indicates the required 61*0Sstevel@tonic-gate * flags for the dldump(3x) calls. 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate static int auflag; 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate int pfd; 67*0Sstevel@tonic-gate int dlflag = RTLD_CONFSET; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate /* 70*0Sstevel@tonic-gate * Initial audit handshake, establish audit mode. 71*0Sstevel@tonic-gate */ 72*0Sstevel@tonic-gate uint_t 73*0Sstevel@tonic-gate /* ARGSUSED */ 74*0Sstevel@tonic-gate la_version(uint_t version) 75*0Sstevel@tonic-gate { 76*0Sstevel@tonic-gate char *str; 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* 79*0Sstevel@tonic-gate * Establish the file desciptor to communicate with the calling process, 80*0Sstevel@tonic-gate * If there are any errors terminate the process. 81*0Sstevel@tonic-gate */ 82*0Sstevel@tonic-gate if ((str = getenv(MSG_ORIG(MSG_ENV_AUD_FD))) == NULL) 83*0Sstevel@tonic-gate exit(1); 84*0Sstevel@tonic-gate pfd = atoi(str); 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * Determine which audit mode is required based on the existance of 88*0Sstevel@tonic-gate * CRLE_FLAGS. 89*0Sstevel@tonic-gate */ 90*0Sstevel@tonic-gate if ((str = getenv(MSG_ORIG(MSG_ENV_AUD_FLAGS))) == NULL) { 91*0Sstevel@tonic-gate auflag = CRLE_AUD_DEPENDS; 92*0Sstevel@tonic-gate } else { 93*0Sstevel@tonic-gate auflag = CRLE_AUD_DLDUMP; 94*0Sstevel@tonic-gate dlflag |= atoi(str); 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* 97*0Sstevel@tonic-gate * Fill any memory holes before anything gets mapped. 98*0Sstevel@tonic-gate */ 99*0Sstevel@tonic-gate if (filladdr() != 0) 100*0Sstevel@tonic-gate exit(1); 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate /* 104*0Sstevel@tonic-gate * We need the audit interface containing la_objfilter(). 105*0Sstevel@tonic-gate */ 106*0Sstevel@tonic-gate return (LAV_VERSION3); 107*0Sstevel@tonic-gate } 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate /* 110*0Sstevel@tonic-gate * Audit interface called for each dependency. If in CRLE_AUD_DEPENDS mode, 111*0Sstevel@tonic-gate * return each dependency of the primary link-map to the caller. 112*0Sstevel@tonic-gate */ 113*0Sstevel@tonic-gate uint_t 114*0Sstevel@tonic-gate /* ARGSUSED2 */ 115*0Sstevel@tonic-gate la_objopen(Link_map * lmp, Lmid_t lmid, uintptr_t *cookie) 116*0Sstevel@tonic-gate { 117*0Sstevel@tonic-gate if (auflag == CRLE_AUD_DLDUMP) 118*0Sstevel@tonic-gate return (0); 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate if ((lmid == LM_ID_BASE) && !(FLAGS((Rt_map *)lmp) & FLG_RT_ISMAIN)) { 121*0Sstevel@tonic-gate char buffer[PATH_MAX]; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate (void) snprintf(buffer, PATH_MAX, MSG_ORIG(MSG_AUD_DEPEND), 124*0Sstevel@tonic-gate lmp->l_name); 125*0Sstevel@tonic-gate (void) write(pfd, buffer, strlen(buffer)); 126*0Sstevel@tonic-gate *cookie = (uintptr_t)lmp->l_name; 127*0Sstevel@tonic-gate } else 128*0Sstevel@tonic-gate *cookie = (uintptr_t)0; 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate return (0); 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate /* 134*0Sstevel@tonic-gate * Audit interface called for any filter/filtee pairs. If in CRLE_AUD_DEPENDS 135*0Sstevel@tonic-gate * mode, return the filter/filtee association to the caller. 136*0Sstevel@tonic-gate */ 137*0Sstevel@tonic-gate int 138*0Sstevel@tonic-gate /* ARGSUSED2 */ 139*0Sstevel@tonic-gate la_objfilter(uintptr_t *fltrcook, const char *fltestr, uintptr_t *fltecook, 140*0Sstevel@tonic-gate uint_t flags) 141*0Sstevel@tonic-gate { 142*0Sstevel@tonic-gate if (auflag == CRLE_AUD_DLDUMP) 143*0Sstevel@tonic-gate return (0); 144*0Sstevel@tonic-gate 145*0Sstevel@tonic-gate if (*fltrcook && *fltestr && *fltecook) { 146*0Sstevel@tonic-gate char buffer[PATH_MAX]; 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate (void) snprintf(buffer, PATH_MAX, MSG_ORIG(MSG_AUD_FILTER), 149*0Sstevel@tonic-gate (char *)(*fltrcook), fltestr, (char *)(*fltecook)); 150*0Sstevel@tonic-gate (void) write(pfd, buffer, strlen(buffer)); 151*0Sstevel@tonic-gate } 152*0Sstevel@tonic-gate return (1); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate /* 156*0Sstevel@tonic-gate * Audit interface called before transfer of control to application. If in 157*0Sstevel@tonic-gate * CRLE_AUD_DLDUMP mode read the configuration file and dldump() all necessary 158*0Sstevel@tonic-gate * objects. 159*0Sstevel@tonic-gate */ 160*0Sstevel@tonic-gate void 161*0Sstevel@tonic-gate /* ARGSUSED */ 162*0Sstevel@tonic-gate la_preinit(uintptr_t *cookie) 163*0Sstevel@tonic-gate { 164*0Sstevel@tonic-gate if (auflag == CRLE_AUD_DLDUMP) { 165*0Sstevel@tonic-gate if (dumpconfig() != 0) 166*0Sstevel@tonic-gate exit(1); 167*0Sstevel@tonic-gate } 168*0Sstevel@tonic-gate exit(0); 169*0Sstevel@tonic-gate } 170