1/*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD$"); 32 33#include <sys/param.h> 34#include <dlfcn.h> 35#include <stdbool.h> 36#include <stdio.h> 37#include <string.h> 38#include <sysdecode.h> 39#include "rtld_utrace.h" 40 41#ifdef __LP64__ 42struct utrace_rtld32 { 43 char sig[4]; 44 int event; 45 uint32_t handle; 46 uint32_t mapbase; 47 uint32_t mapsize; 48 int refcnt; 49 char name[MAXPATHLEN]; 50}; 51#endif 52 53static int 54print_utrace_rtld(FILE *fp, void *p) 55{ 56 struct utrace_rtld *ut = p; 57 void *parent; 58 int mode; 59 60 switch (ut->event) { 61 case UTRACE_DLOPEN_START: 62 mode = ut->refcnt; 63 fprintf(fp, "dlopen(%s, ", ut->name); 64 switch (mode & RTLD_MODEMASK) { 65 case RTLD_NOW: 66 fprintf(fp, "RTLD_NOW"); 67 break; 68 case RTLD_LAZY: 69 fprintf(fp, "RTLD_LAZY"); 70 break; 71 default: 72 fprintf(fp, "%#x", mode & RTLD_MODEMASK); 73 } 74 if (mode & RTLD_GLOBAL) 75 fprintf(fp, " | RTLD_GLOBAL"); 76 if (mode & RTLD_TRACE) 77 fprintf(fp, " | RTLD_TRACE"); 78 if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)) 79 fprintf(fp, " | %#x", mode & 80 ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE)); 81 fprintf(fp, ")"); 82 break; 83 case UTRACE_DLOPEN_STOP: 84 fprintf(fp, "%p = dlopen(%s) ref %d", ut->handle, ut->name, 85 ut->refcnt); 86 break; 87 case UTRACE_DLCLOSE_START: 88 fprintf(fp, "dlclose(%p) (%s, %d)", ut->handle, ut->name, 89 ut->refcnt); 90 break; 91 case UTRACE_DLCLOSE_STOP: 92 fprintf(fp, "dlclose(%p) finished", ut->handle); 93 break; 94 case UTRACE_LOAD_OBJECT: 95 fprintf(fp, "RTLD: loaded %p @ %p - %p (%s)", ut->handle, 96 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, 97 ut->name); 98 break; 99 case UTRACE_UNLOAD_OBJECT: 100 fprintf(fp, "RTLD: unloaded %p @ %p - %p (%s)", ut->handle, 101 ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1, 102 ut->name); 103 break; 104 case UTRACE_ADD_RUNDEP: 105 parent = ut->mapbase; 106 fprintf(fp, "RTLD: %p now depends on %p (%s, %d)", parent, 107 ut->handle, ut->name, ut->refcnt); 108 break; 109 case UTRACE_PRELOAD_FINISHED: 110 fprintf(fp, "RTLD: LD_PRELOAD finished"); 111 break; 112 case UTRACE_INIT_CALL: 113 fprintf(fp, "RTLD: init %p for %p (%s)", ut->mapbase, ut->handle, 114 ut->name); 115 break; 116 case UTRACE_FINI_CALL: 117 fprintf(fp, "RTLD: fini %p for %p (%s)", ut->mapbase, ut->handle, 118 ut->name); 119 break; 120 case UTRACE_DLSYM_START: 121 fprintf(fp, "RTLD: dlsym(%p, %s)", ut->handle, ut->name); 122 break; 123 case UTRACE_DLSYM_STOP: 124 fprintf(fp, "RTLD: %p = dlsym(%p, %s)", ut->mapbase, ut->handle, 125 ut->name); 126 break; 127 case UTRACE_RTLD_ERROR: 128 fprintf(fp, "RTLD: error: %s\n", ut->name); 129 break; 130 131 default: 132 return (0); 133 } 134 return (1); 135} 136 137struct utrace_malloc { 138 void *p; 139 size_t s; 140 void *r; 141}; 142 143#ifdef __LP64__ 144struct utrace_malloc32 { 145 uint32_t p; 146 uint32_t s; 147 uint32_t r; 148}; 149#endif 150 151static void 152print_utrace_malloc(FILE *fp, void *p) 153{ 154 struct utrace_malloc *ut = p; 155 156 if (ut->p == (void *)(intptr_t)(-1)) 157 fprintf(fp, "malloc_init()"); 158 else if (ut->s == 0) 159 fprintf(fp, "free(%p)", ut->p); 160 else if (ut->p == NULL) 161 fprintf(fp, "%p = malloc(%zu)", ut->r, ut->s); 162 else 163 fprintf(fp, "%p = realloc(%p, %zu)", ut->r, ut->p, ut->s); 164} 165 166int 167sysdecode_utrace(FILE *fp, void *p, size_t len) 168{ 169#ifdef __LP64__ 170 struct utrace_rtld ur; 171 struct utrace_rtld32 *pr; 172 struct utrace_malloc um; 173 struct utrace_malloc32 *pm; 174#endif 175 static const char rtld_utrace_sig[RTLD_UTRACE_SIG_SZ] = RTLD_UTRACE_SIG; 176 177 if (len == sizeof(struct utrace_rtld) && bcmp(p, rtld_utrace_sig, 178 sizeof(rtld_utrace_sig)) == 0) 179 return (print_utrace_rtld(fp, p)); 180 181 if (len == sizeof(struct utrace_malloc)) { 182 print_utrace_malloc(fp, p); 183 return (1); 184 } 185 186#ifdef __LP64__ 187 if (len == sizeof(struct utrace_rtld32) && bcmp(p, rtld_utrace_sig, 188 sizeof(rtld_utrace_sig)) == 0) { 189 pr = p; 190 memset(&ur, 0, sizeof(ur)); 191 memcpy(ur.sig, pr->sig, sizeof(ur.sig)); 192 ur.event = pr->event; 193 ur.handle = (void *)(uintptr_t)pr->handle; 194 ur.mapbase = (void *)(uintptr_t)pr->mapbase; 195 ur.mapsize = pr->mapsize; 196 ur.refcnt = pr->refcnt; 197 memcpy(ur.name, pr->name, sizeof(ur.name)); 198 return (print_utrace_rtld(fp, &ur)); 199 } 200 201 if (len == sizeof(struct utrace_malloc32)) { 202 pm = p; 203 memset(&um, 0, sizeof(um)); 204 um.p = pm->p == (uint32_t)-1 ? (void *)(intptr_t)-1 : 205 (void *)(uintptr_t)pm->p; 206 um.s = pm->s; 207 um.r = (void *)(uintptr_t)pm->r; 208 print_utrace_malloc(fp, &um); 209 return (1); 210 } 211#endif 212 213 return (0); 214} 215