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 1.6 2005/12/23 21:35:44 swildner 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 (db_addr_t, char *, int); 49 static void db_search (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(db_expr_t addr, boolean_t have_addr, db_expr_t count, 57 char *modif) 58 { 59 if (modif[0] != '\0') 60 db_strcpy(db_examine_format, modif); 61 62 if (count == -1) 63 count = 1; 64 65 db_examine((db_addr_t) addr, db_examine_format, count); 66 } 67 68 /* 69 * Parameters: 70 * fmt: format string 71 * count: repeat count 72 */ 73 static void 74 db_examine(db_addr_t addr, char *fmt, int count) 75 { 76 int c; 77 db_expr_t value; 78 int size; 79 int width; 80 char * fp; 81 82 while (--count >= 0) { 83 fp = fmt; 84 size = 4; 85 width = 16; 86 while ((c = *fp++) != 0) { 87 switch (c) { 88 case 'b': 89 size = 1; 90 width = 4; 91 break; 92 case 'h': 93 size = 2; 94 width = 8; 95 break; 96 case 'l': 97 size = 4; 98 width = 16; 99 break; 100 case 'g': 101 size = 8; 102 width = 32; 103 break; 104 case 'a': /* address */ 105 /* always forces a new line */ 106 if (db_print_position() != 0) 107 db_printf("\n"); 108 db_prev = addr; 109 db_printsym(addr, DB_STGY_ANY); 110 db_printf(":\t"); 111 break; 112 default: 113 if (db_print_position() == 0) { 114 /* Print the address. */ 115 db_printsym(addr, DB_STGY_ANY); 116 db_printf(":\t"); 117 db_prev = addr; 118 } 119 120 switch (c) { 121 case 'r': /* signed, current radix */ 122 value = db_get_value(addr, size, TRUE); 123 addr += size; 124 db_printf("%+-*lr", width, (long)value); 125 break; 126 case 'x': /* unsigned hex */ 127 value = db_get_value(addr, size, FALSE); 128 addr += size; 129 db_printf("%-*lx", width, (long)value); 130 break; 131 case 'z': /* signed hex */ 132 value = db_get_value(addr, size, TRUE); 133 addr += size; 134 db_printf("%-*lz", width, (long)value); 135 break; 136 case 'd': /* signed decimal */ 137 value = db_get_value(addr, size, TRUE); 138 addr += size; 139 db_printf("%-*ld", width, (long)value); 140 break; 141 case 'u': /* unsigned decimal */ 142 value = db_get_value(addr, size, FALSE); 143 addr += size; 144 db_printf("%-*lu", width, (long)value); 145 break; 146 case 'o': /* unsigned octal */ 147 value = db_get_value(addr, size, FALSE); 148 addr += size; 149 db_printf("%-*lo", width, (long)value); 150 break; 151 case 'c': /* character */ 152 value = db_get_value(addr, 1, FALSE); 153 addr += 1; 154 if (value >= ' ' && value <= '~') 155 db_printf("%c", (int)value); 156 else 157 db_printf("\\%03o", (int)value); 158 break; 159 case 's': /* null-terminated string */ 160 for (;;) { 161 value = db_get_value(addr, 1, FALSE); 162 addr += 1; 163 if (value == 0) 164 break; 165 if (value >= ' ' && value <= '~') 166 db_printf("%c", (int)value); 167 else 168 db_printf("\\%03o", (int)value); 169 } 170 break; 171 case 'i': /* instruction */ 172 addr = db_disasm(addr, FALSE, NULL); 173 break; 174 case 'I': /* instruction, alternate form */ 175 addr = db_disasm(addr, TRUE, NULL); 176 break; 177 default: 178 break; 179 } 180 if (db_print_position() != 0) 181 db_end_line(); 182 break; 183 } 184 } 185 } 186 db_next = addr; 187 } 188 189 /* 190 * Print value. 191 */ 192 static char db_print_format = 'x'; 193 194 /*ARGSUSED*/ 195 void 196 db_print_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *modif) 197 { 198 db_expr_t value; 199 200 if (modif[0] != '\0') 201 db_print_format = modif[0]; 202 203 switch (db_print_format) { 204 case 'a': 205 db_printsym((db_addr_t)addr, DB_STGY_ANY); 206 break; 207 case 'r': 208 db_printf("%+11lr", (long)addr); 209 break; 210 case 'x': 211 db_printf("%8lx", (unsigned long)addr); 212 break; 213 case 'z': 214 db_printf("%8lz", (long)addr); 215 break; 216 case 'd': 217 db_printf("%11ld", (long)addr); 218 break; 219 case 'u': 220 db_printf("%11lu", (unsigned long)addr); 221 break; 222 case 'o': 223 db_printf("%16lo", (unsigned long)addr); 224 break; 225 case 'c': 226 value = addr & 0xFF; 227 if (value >= ' ' && value <= '~') 228 db_printf("%c", (int)value); 229 else 230 db_printf("\\%03o", (int)value); 231 break; 232 } 233 db_printf("\n"); 234 } 235 236 void 237 db_print_loc_and_inst(db_addr_t loc, db_regs_t *regs) 238 { 239 db_printsym(loc, DB_STGY_PROC); 240 db_printf(":\t"); 241 db_disasm(loc, TRUE, regs); 242 } 243 244 /* 245 * Search for a value in memory. 246 * Syntax: search [/bhl] addr value [mask] [,count] 247 */ 248 void 249 db_search_cmd(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, 250 char *dummy4) 251 { 252 int t; 253 db_addr_t addr; 254 int size; 255 db_expr_t value; 256 db_expr_t mask; 257 db_expr_t count; 258 259 t = db_read_token(); 260 if (t == tSLASH) { 261 t = db_read_token(); 262 if (t != tIDENT) { 263 bad_modifier: 264 db_printf("Bad modifier\n"); 265 db_flush_lex(); 266 return; 267 } 268 269 if (!strcmp(db_tok_string, "b")) 270 size = 1; 271 else if (!strcmp(db_tok_string, "h")) 272 size = 2; 273 else if (!strcmp(db_tok_string, "l")) 274 size = 4; 275 else 276 goto bad_modifier; 277 } else { 278 db_unread_token(t); 279 size = 4; 280 } 281 282 if (!db_expression((db_expr_t *)&addr)) { 283 db_printf("Address missing\n"); 284 db_flush_lex(); 285 return; 286 } 287 288 if (!db_expression(&value)) { 289 db_printf("Value missing\n"); 290 db_flush_lex(); 291 return; 292 } 293 294 if (!db_expression(&mask)) 295 mask = 0xffffffffUL; 296 297 t = db_read_token(); 298 if (t == tCOMMA) { 299 if (!db_expression(&count)) { 300 db_printf("Count missing\n"); 301 db_flush_lex(); 302 return; 303 } 304 } else { 305 db_unread_token(t); 306 count = -1; /* effectively forever */ 307 } 308 db_skip_to_eol(); 309 310 db_search(addr, size, value, mask, count); 311 } 312 313 static void 314 db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, 315 unsigned int count) 316 { 317 while (count-- != 0) { 318 db_prev = addr; 319 if ((db_get_value(addr, size, FALSE) & mask) == value) 320 break; 321 addr += size; 322 } 323 db_next = addr; 324 } 325