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