1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 * 26 * $FreeBSD: src/sys/ddb/db_examine.c,v 1.27 1999/08/28 00:41:07 peter Exp $ 27 * $DragonFly: src/sys/ddb/db_examine.c,v 1.3 2003/07/26 14:18:51 rob Exp $ 28 */ 29 30 /* 31 * Author: David B. Golub, Carnegie Mellon University 32 * Date: 7/90 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 38 #include <ddb/ddb.h> 39 40 #include <ddb/db_lex.h> 41 #include <ddb/db_output.h> 42 #include <ddb/db_command.h> 43 #include <ddb/db_sym.h> 44 #include <ddb/db_access.h> 45 46 static char db_examine_format[TOK_STRING_SIZE] = "x"; 47 48 static void db_examine __P((db_addr_t, char *, int)); 49 static void db_search __P((db_addr_t, int, db_expr_t, db_expr_t, u_int)); 50 51 /* 52 * Examine (print) data. 53 */ 54 /*ARGSUSED*/ 55 void 56 db_examine_cmd(addr, have_addr, count, modif) 57 db_expr_t addr; 58 boolean_t have_addr; 59 db_expr_t count; 60 char * modif; 61 { 62 if (modif[0] != '\0') 63 db_strcpy(db_examine_format, modif); 64 65 if (count == -1) 66 count = 1; 67 68 db_examine((db_addr_t) addr, db_examine_format, count); 69 } 70 71 static void 72 db_examine(addr, fmt, count) 73 74 db_addr_t addr; 75 char * fmt; /* format string */ 76 int count; /* repeat count */ 77 { 78 int c; 79 db_expr_t value; 80 int size; 81 int width; 82 char * fp; 83 84 while (--count >= 0) { 85 fp = fmt; 86 size = 4; 87 width = 16; 88 while ((c = *fp++) != 0) { 89 switch (c) { 90 case 'b': 91 size = 1; 92 width = 4; 93 break; 94 case 'h': 95 size = 2; 96 width = 8; 97 break; 98 case 'l': 99 size = 4; 100 width = 16; 101 break; 102 case 'g': 103 size = 8; 104 width = 32; 105 break; 106 case 'a': /* address */ 107 /* always forces a new line */ 108 if (db_print_position() != 0) 109 db_printf("\n"); 110 db_prev = addr; 111 db_printsym(addr, DB_STGY_ANY); 112 db_printf(":\t"); 113 break; 114 default: 115 if (db_print_position() == 0) { 116 /* Print the address. */ 117 db_printsym(addr, DB_STGY_ANY); 118 db_printf(":\t"); 119 db_prev = addr; 120 } 121 122 switch (c) { 123 case 'r': /* signed, current radix */ 124 value = db_get_value(addr, size, TRUE); 125 addr += size; 126 db_printf("%+-*lr", width, (long)value); 127 break; 128 case 'x': /* unsigned hex */ 129 value = db_get_value(addr, size, FALSE); 130 addr += size; 131 db_printf("%-*lx", width, (long)value); 132 break; 133 case 'z': /* signed hex */ 134 value = db_get_value(addr, size, TRUE); 135 addr += size; 136 db_printf("%-*lz", width, (long)value); 137 break; 138 case 'd': /* signed decimal */ 139 value = db_get_value(addr, size, TRUE); 140 addr += size; 141 db_printf("%-*ld", width, (long)value); 142 break; 143 case 'u': /* unsigned decimal */ 144 value = db_get_value(addr, size, FALSE); 145 addr += size; 146 db_printf("%-*lu", width, (long)value); 147 break; 148 case 'o': /* unsigned octal */ 149 value = db_get_value(addr, size, FALSE); 150 addr += size; 151 db_printf("%-*lo", width, (long)value); 152 break; 153 case 'c': /* character */ 154 value = db_get_value(addr, 1, FALSE); 155 addr += 1; 156 if (value >= ' ' && value <= '~') 157 db_printf("%c", (int)value); 158 else 159 db_printf("\\%03o", (int)value); 160 break; 161 case 's': /* null-terminated string */ 162 for (;;) { 163 value = db_get_value(addr, 1, FALSE); 164 addr += 1; 165 if (value == 0) 166 break; 167 if (value >= ' ' && value <= '~') 168 db_printf("%c", (int)value); 169 else 170 db_printf("\\%03o", (int)value); 171 } 172 break; 173 case 'i': /* instruction */ 174 addr = db_disasm(addr, FALSE); 175 break; 176 case 'I': /* instruction, alternate form */ 177 addr = db_disasm(addr, TRUE); 178 break; 179 default: 180 break; 181 } 182 if (db_print_position() != 0) 183 db_end_line(); 184 break; 185 } 186 } 187 } 188 db_next = addr; 189 } 190 191 /* 192 * Print value. 193 */ 194 static char db_print_format = 'x'; 195 196 /*ARGSUSED*/ 197 void 198 db_print_cmd(addr, have_addr, count, modif) 199 db_expr_t addr; 200 boolean_t have_addr; 201 db_expr_t count; 202 char * modif; 203 { 204 db_expr_t value; 205 206 if (modif[0] != '\0') 207 db_print_format = modif[0]; 208 209 switch (db_print_format) { 210 case 'a': 211 db_printsym((db_addr_t)addr, DB_STGY_ANY); 212 break; 213 case 'r': 214 db_printf("%+11lr", (long)addr); 215 break; 216 case 'x': 217 db_printf("%8lx", (unsigned long)addr); 218 break; 219 case 'z': 220 db_printf("%8lz", (long)addr); 221 break; 222 case 'd': 223 db_printf("%11ld", (long)addr); 224 break; 225 case 'u': 226 db_printf("%11lu", (unsigned long)addr); 227 break; 228 case 'o': 229 db_printf("%16lo", (unsigned long)addr); 230 break; 231 case 'c': 232 value = addr & 0xFF; 233 if (value >= ' ' && value <= '~') 234 db_printf("%c", (int)value); 235 else 236 db_printf("\\%03o", (int)value); 237 break; 238 } 239 db_printf("\n"); 240 } 241 242 void 243 db_print_loc_and_inst(loc) 244 db_addr_t loc; 245 { 246 db_printsym(loc, DB_STGY_PROC); 247 db_printf(":\t"); 248 (void) db_disasm(loc, TRUE); 249 } 250 251 /* 252 * Search for a value in memory. 253 * Syntax: search [/bhl] addr value [mask] [,count] 254 */ 255 void 256 db_search_cmd(dummy1, dummy2, dummy3, dummy4) 257 db_expr_t dummy1; 258 boolean_t dummy2; 259 db_expr_t dummy3; 260 char * dummy4; 261 { 262 int t; 263 db_addr_t addr; 264 int size; 265 db_expr_t value; 266 db_expr_t mask; 267 db_expr_t count; 268 269 t = db_read_token(); 270 if (t == tSLASH) { 271 t = db_read_token(); 272 if (t != tIDENT) { 273 bad_modifier: 274 db_printf("Bad modifier\n"); 275 db_flush_lex(); 276 return; 277 } 278 279 if (!strcmp(db_tok_string, "b")) 280 size = 1; 281 else if (!strcmp(db_tok_string, "h")) 282 size = 2; 283 else if (!strcmp(db_tok_string, "l")) 284 size = 4; 285 else 286 goto bad_modifier; 287 } else { 288 db_unread_token(t); 289 size = 4; 290 } 291 292 if (!db_expression((db_expr_t *)&addr)) { 293 db_printf("Address missing\n"); 294 db_flush_lex(); 295 return; 296 } 297 298 if (!db_expression(&value)) { 299 db_printf("Value missing\n"); 300 db_flush_lex(); 301 return; 302 } 303 304 if (!db_expression(&mask)) 305 mask = 0xffffffffUL; 306 307 t = db_read_token(); 308 if (t == tCOMMA) { 309 if (!db_expression(&count)) { 310 db_printf("Count missing\n"); 311 db_flush_lex(); 312 return; 313 } 314 } else { 315 db_unread_token(t); 316 count = -1; /* effectively forever */ 317 } 318 db_skip_to_eol(); 319 320 db_search(addr, size, value, mask, count); 321 } 322 323 static void 324 db_search(addr, size, value, mask, count) 325 326 db_addr_t addr; 327 int size; 328 db_expr_t value; 329 db_expr_t mask; 330 unsigned int count; 331 { 332 while (count-- != 0) { 333 db_prev = addr; 334 if ((db_get_value(addr, size, FALSE) & mask) == value) 335 break; 336 addr += size; 337 } 338 db_next = addr; 339 } 340