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 * $Id: db_examine.c,v 1.5 1994/08/13 03:49:17 wollman Exp $ 27 */ 28 29 /* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/proc.h> 36 37 #include <ddb/ddb.h> 38 39 #include <ddb/db_lex.h> 40 #include <ddb/db_output.h> 41 #include <ddb/db_command.h> 42 #include <ddb/db_sym.h> 43 #include <ddb/db_access.h> 44 45 char db_examine_format[TOK_STRING_SIZE] = "x"; 46 47 static void db_examine(db_addr_t, char *, int); 48 static void db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int); 49 50 /* 51 * Examine (print) data. 52 */ 53 /*ARGSUSED*/ 54 void 55 db_examine_cmd(addr, have_addr, count, modif) 56 db_expr_t addr; 57 int have_addr; 58 db_expr_t count; 59 char * modif; 60 { 61 if (modif[0] != '\0') 62 db_strcpy(db_examine_format, modif); 63 64 if (count == -1) 65 count = 1; 66 67 db_examine((db_addr_t) addr, db_examine_format, count); 68 } 69 70 static void 71 db_examine(addr, fmt, count) 72 register 73 db_addr_t addr; 74 char * fmt; /* format string */ 75 int count; /* repeat count */ 76 { 77 int c; 78 db_expr_t value; 79 int size; 80 int width; 81 char * fp; 82 83 while (--count >= 0) { 84 fp = fmt; 85 size = 4; 86 width = 16; 87 while ((c = *fp++) != 0) { 88 switch (c) { 89 case 'b': 90 size = 1; 91 width = 4; 92 break; 93 case 'h': 94 size = 2; 95 width = 8; 96 break; 97 case 'l': 98 size = 4; 99 width = 16; 100 break; 101 case 'a': /* address */ 102 /* always forces a new line */ 103 if (db_print_position() != 0) 104 db_printf("\n"); 105 db_prev = addr; 106 db_printsym(addr, DB_STGY_ANY); 107 db_printf(":\t"); 108 break; 109 default: 110 if (db_print_position() == 0) { 111 /* If we hit a new symbol, print it */ 112 char * name; 113 db_expr_t off; 114 115 db_find_sym_and_offset(addr, &name, &off); 116 if (off == 0) 117 db_printf("%s:\t", name); 118 else 119 db_printf("\t\t"); 120 121 db_prev = addr; 122 } 123 124 switch (c) { 125 case 'r': /* signed, current radix */ 126 value = db_get_value(addr, size, TRUE); 127 addr += size; 128 db_printf("%-*r", width, value); 129 break; 130 case 'x': /* unsigned hex */ 131 value = db_get_value(addr, size, FALSE); 132 addr += size; 133 db_printf("%-*x", width, value); 134 break; 135 case 'z': /* signed hex */ 136 value = db_get_value(addr, size, TRUE); 137 addr += size; 138 db_printf("%-*z", width, value); 139 break; 140 case 'd': /* signed decimal */ 141 value = db_get_value(addr, size, TRUE); 142 addr += size; 143 db_printf("%-*d", width, value); 144 break; 145 case 'u': /* unsigned decimal */ 146 value = db_get_value(addr, size, FALSE); 147 addr += size; 148 db_printf("%-*u", width, value); 149 break; 150 case 'o': /* unsigned octal */ 151 value = db_get_value(addr, size, FALSE); 152 addr += size; 153 db_printf("%-*o", width, value); 154 break; 155 case 'c': /* character */ 156 value = db_get_value(addr, 1, FALSE); 157 addr += 1; 158 if (value >= ' ' && value <= '~') 159 db_printf("%c", value); 160 else 161 db_printf("\\%03o", value); 162 break; 163 case 's': /* null-terminated string */ 164 for (;;) { 165 value = db_get_value(addr, 1, FALSE); 166 addr += 1; 167 if (value == 0) 168 break; 169 if (value >= ' ' && value <= '~') 170 db_printf("%c", value); 171 else 172 db_printf("\\%03o", value); 173 } 174 break; 175 case 'i': /* instruction */ 176 addr = db_disasm(addr, FALSE); 177 break; 178 case 'I': /* instruction, alternate form */ 179 addr = db_disasm(addr, TRUE); 180 break; 181 default: 182 break; 183 } 184 if (db_print_position() != 0) 185 db_end_line(); 186 break; 187 } 188 } 189 } 190 db_next = addr; 191 } 192 193 /* 194 * Print value. 195 */ 196 char db_print_format = 'x'; 197 198 /*ARGSUSED*/ 199 void 200 db_print_cmd(addr, have_addr, count, modif) 201 db_expr_t addr; 202 int have_addr; 203 db_expr_t count; 204 char * modif; 205 { 206 db_expr_t value; 207 208 if (modif[0] != '\0') 209 db_print_format = modif[0]; 210 211 switch (db_print_format) { 212 case 'a': 213 db_printsym((db_addr_t)addr, DB_STGY_ANY); 214 break; 215 case 'r': 216 db_printf("%11r", addr); 217 break; 218 case 'x': 219 db_printf("%8x", addr); 220 break; 221 case 'z': 222 db_printf("%8z", addr); 223 break; 224 case 'd': 225 db_printf("%11d", addr); 226 break; 227 case 'u': 228 db_printf("%11u", addr); 229 break; 230 case 'o': 231 db_printf("%16o", addr); 232 break; 233 case 'c': 234 value = addr & 0xFF; 235 if (value >= ' ' && value <= '~') 236 db_printf("%c", value); 237 else 238 db_printf("\\%03o", value); 239 break; 240 } 241 db_printf("\n"); 242 } 243 244 void 245 db_print_loc_and_inst(loc) 246 db_addr_t loc; 247 { 248 db_printsym(loc, DB_STGY_PROC); 249 db_printf(":\t"); 250 (void) db_disasm(loc, TRUE); 251 } 252 253 /* 254 * Search for a value in memory. 255 * Syntax: search [/bhl] addr value [mask] [,count] 256 */ 257 void 258 db_search_cmd(db_expr_t dummy1, int dummy2, db_expr_t dummy3, char *dummy4) 259 { 260 int t; 261 db_addr_t addr; 262 int size; 263 db_expr_t value; 264 db_expr_t mask; 265 unsigned int count; 266 267 t = db_read_token(); 268 if (t == tSLASH) { 269 t = db_read_token(); 270 if (t != tIDENT) { 271 bad_modifier: 272 db_printf("Bad modifier\n"); 273 db_flush_lex(); 274 return; 275 } 276 277 if (!strcmp(db_tok_string, "b")) 278 size = 1; 279 else if (!strcmp(db_tok_string, "h")) 280 size = 2; 281 else if (!strcmp(db_tok_string, "l")) 282 size = 4; 283 else 284 goto bad_modifier; 285 } else { 286 db_unread_token(t); 287 size = 4; 288 } 289 290 if (!db_expression((db_expr_t *)&addr)) { 291 db_printf("Address missing\n"); 292 db_flush_lex(); 293 return; 294 } 295 296 if (!db_expression(&value)) { 297 db_printf("Value missing\n"); 298 db_flush_lex(); 299 return; 300 } 301 302 if (!db_expression(&mask)) 303 mask = 0xffffffffUL; 304 305 t = db_read_token(); 306 if (t == tCOMMA) { 307 if (!db_expression(&count)) { 308 db_printf("Count missing\n"); 309 db_flush_lex(); 310 return; 311 } 312 } else { 313 db_unread_token(t); 314 count = -1; /* effectively forever */ 315 } 316 db_skip_to_eol(); 317 318 db_search(addr, size, value, mask, count); 319 } 320 321 static void 322 db_search(addr, size, value, mask, count) 323 register 324 db_addr_t addr; 325 int size; 326 db_expr_t value; 327 db_expr_t mask; 328 unsigned int count; 329 { 330 while (count-- != 0) { 331 db_prev = addr; 332 if ((db_get_value(addr, size, FALSE) & mask) == value) 333 break; 334 addr += size; 335 } 336 db_next = addr; 337 } 338