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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * Utility functions 30 */ 31 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <libelf.h> 36 #include <gelf.h> 37 #include <errno.h> 38 #include <stdarg.h> 39 #include <pthread.h> 40 #include <unistd.h> 41 #include <sys/param.h> 42 43 #include "ctftools.h" 44 #include "memory.h" 45 46 static void (*terminate_cleanup)() = NULL; 47 48 /* returns 1 if s1 == s2, 0 otherwise */ 49 int 50 streq(const char *s1, const char *s2) 51 { 52 if (s1 == NULL) { 53 if (s2 != NULL) 54 return (0); 55 } else if (s2 == NULL) 56 return (0); 57 else if (strcmp(s1, s2) != 0) 58 return (0); 59 60 return (1); 61 } 62 63 int 64 findelfsecidx(Elf *elf, const char *file, const char *tofind) 65 { 66 Elf_Scn *scn = NULL; 67 GElf_Ehdr ehdr; 68 GElf_Shdr shdr; 69 70 if (gelf_getehdr(elf, &ehdr) == NULL) 71 elfterminate(file, "Couldn't read ehdr"); 72 73 while ((scn = elf_nextscn(elf, scn)) != NULL) { 74 char *name; 75 76 if (gelf_getshdr(scn, &shdr) == NULL) { 77 elfterminate(file, 78 "Couldn't read header for section %d", 79 elf_ndxscn(scn)); 80 } 81 82 if ((name = elf_strptr(elf, ehdr.e_shstrndx, 83 (size_t)shdr.sh_name)) == NULL) { 84 elfterminate(file, 85 "Couldn't get name for section %d", 86 elf_ndxscn(scn)); 87 } 88 89 if (strcmp(name, tofind) == 0) 90 return (elf_ndxscn(scn)); 91 } 92 93 return (-1); 94 } 95 96 size_t 97 elf_ptrsz(Elf *elf) 98 { 99 GElf_Ehdr ehdr; 100 101 if (gelf_getehdr(elf, &ehdr) == NULL) { 102 terminate("failed to read ELF header: %s\n", 103 elf_errmsg(-1)); 104 } 105 106 if (ehdr.e_ident[EI_CLASS] == ELFCLASS32) 107 return (4); 108 else if (ehdr.e_ident[EI_CLASS] == ELFCLASS64) 109 return (8); 110 else 111 terminate("unknown ELF class %d\n", ehdr.e_ident[EI_CLASS]); 112 113 /*NOTREACHED*/ 114 return (0); 115 } 116 117 /*PRINTFLIKE2*/ 118 static void 119 whine(char *type, char *format, va_list ap) 120 { 121 int error = errno; 122 123 fprintf(stderr, "%s: %s: ", type, progname); 124 vfprintf(stderr, format, ap); 125 126 if (format[strlen(format) - 1] != '\n') 127 fprintf(stderr, ": %s\n", strerror(error)); 128 } 129 130 void 131 set_terminate_cleanup(void (*cleanup)()) 132 { 133 terminate_cleanup = cleanup; 134 } 135 136 /*PRINTFLIKE1*/ 137 void 138 terminate(char *format, ...) 139 { 140 va_list ap; 141 142 va_start(ap, format); 143 whine("ERROR", format, ap); 144 va_end(ap); 145 146 if (terminate_cleanup) 147 terminate_cleanup(); 148 149 if (getenv("CTF_ABORT_ON_TERMINATE") != NULL) 150 abort(); 151 exit(1); 152 } 153 154 /*PRINTFLIKE1*/ 155 void 156 aborterr(char *format, ...) 157 { 158 va_list ap; 159 160 va_start(ap, format); 161 whine("ERROR", format, ap); 162 va_end(ap); 163 164 abort(); 165 } 166 167 /*PRINTFLIKE1*/ 168 void 169 warning(char *format, ...) 170 { 171 va_list ap; 172 173 va_start(ap, format); 174 whine("WARNING", format, ap); 175 va_end(ap); 176 177 if (debug_level >= 3) 178 terminate("Termination due to warning\n"); 179 } 180 181 /*PRINTFLIKE2*/ 182 void 183 vadebug(int level, char *format, va_list ap) 184 { 185 if (level > debug_level) 186 return; 187 188 (void) fprintf(DEBUG_STREAM, "DEBUG: "); 189 (void) vfprintf(DEBUG_STREAM, format, ap); 190 fflush(DEBUG_STREAM); 191 } 192 193 /*PRINTFLIKE2*/ 194 void 195 debug(int level, char *format, ...) 196 { 197 va_list ap; 198 199 if (level > debug_level) 200 return; 201 202 va_start(ap, format); 203 (void) vadebug(level, format, ap); 204 va_end(ap); 205 } 206 207 char * 208 mktmpname(const char *origname, const char *suffix) 209 { 210 char *newname; 211 212 newname = xmalloc(strlen(origname) + strlen(suffix) + 1); 213 (void) strcpy(newname, origname); 214 (void) strcat(newname, suffix); 215 return (newname); 216 } 217 218 /*PRINTFLIKE2*/ 219 void 220 elfterminate(const char *file, const char *fmt, ...) 221 { 222 static char msgbuf[BUFSIZ]; 223 va_list ap; 224 225 va_start(ap, fmt); 226 vsnprintf(msgbuf, sizeof (msgbuf), fmt, ap); 227 va_end(ap); 228 229 terminate("%s: %s: %s\n", file, msgbuf, elf_errmsg(-1)); 230 } 231 232 const char * 233 tdesc_name(tdesc_t *tdp) 234 { 235 return (tdp->t_name == NULL ? "(anon)" : tdp->t_name); 236 } 237