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 */ 28 29 /* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 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, boolean_t have_addr, db_expr_t count, 56 char *modif) 57 { 58 if (modif[0] != '\0') 59 db_strcpy(db_examine_format, modif); 60 61 if (count == -1) 62 count = 1; 63 64 db_examine((db_addr_t) addr, db_examine_format, count); 65 } 66 67 /* 68 * Parameters: 69 * fmt: format string 70 * count: repeat count 71 */ 72 static void 73 db_examine(db_addr_t addr, char *fmt, int count) 74 { 75 int c; 76 db_expr_t value; 77 int size; 78 int width; 79 char * fp; 80 char tbuf[24]; 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 default: 105 if (db_print_position() == 0) { 106 /* Print the address. */ 107 db_printsym(addr, DB_STGY_ANY); 108 db_printf(":\t"); 109 db_prev = addr; 110 } 111 112 switch (c) { 113 case 'a': 114 size = sizeof(void *); 115 value = db_get_value(addr, size, TRUE); 116 addr += size; 117 db_printsym(value, DB_STGY_ANY); 118 break; 119 case 'p': 120 size = sizeof(void *); 121 value = db_get_value(addr, size, TRUE); 122 addr += size; 123 db_printf("%p", (void *)value); 124 break; 125 case 'r': /* signed, current radix */ 126 value = db_get_value(addr, size, TRUE); 127 addr += size; 128 db_printf("%+-*lr", width, (long)value); 129 break; 130 case 'x': /* unsigned hex */ 131 value = db_get_value(addr, size, FALSE); 132 addr += size; 133 db_printf("%-*lx", width, (long)value); 134 break; 135 case 'z': /* signed hex */ 136 value = db_get_value(addr, size, TRUE); 137 addr += size; 138 db_format_hex(tbuf, 24, value, FALSE); 139 db_printf("%-*s", width, tbuf); 140 break; 141 case 'd': /* signed decimal */ 142 value = db_get_value(addr, size, TRUE); 143 addr += size; 144 db_printf("%-*ld", width, (long)value); 145 break; 146 case 'u': /* unsigned decimal */ 147 value = db_get_value(addr, size, FALSE); 148 addr += size; 149 db_printf("%-*lu", width, (long)value); 150 break; 151 case 'o': /* unsigned octal */ 152 value = db_get_value(addr, size, FALSE); 153 addr += size; 154 db_printf("%-*lo", width, (long)value); 155 break; 156 case 'c': /* character */ 157 value = db_get_value(addr, 1, FALSE); 158 addr += 1; 159 if (value >= ' ' && value <= '~') 160 db_printf("%c", (int)value); 161 else 162 db_printf("\\%03o", (int)value); 163 break; 164 case 's': /* null-terminated string */ 165 for (;;) { 166 value = db_get_value(addr, 1, FALSE); 167 addr += 1; 168 if (value == 0) 169 break; 170 if (value >= ' ' && value <= '~') 171 db_printf("%c", (int)value); 172 else 173 db_printf("\\%03o", (int)value); 174 } 175 break; 176 case 'i': /* instruction */ 177 addr = db_disasm(addr, FALSE, NULL); 178 break; 179 case 'I': /* instruction, alternate form */ 180 addr = db_disasm(addr, TRUE, NULL); 181 break; 182 default: 183 break; 184 } 185 if (db_print_position() != 0 || 186 c == 'a' || c == 'p') { 187 db_end_line(1); 188 } 189 break; 190 } 191 } 192 } 193 db_next = addr; 194 } 195 196 /* 197 * Print value. 198 */ 199 static char db_print_format = 'x'; 200 201 /*ARGSUSED*/ 202 void 203 db_print_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *modif) 204 { 205 db_expr_t value; 206 207 if (modif[0] != '\0') 208 db_print_format = modif[0]; 209 210 switch (db_print_format) { 211 case 'a': 212 db_printsym((db_addr_t)addr, DB_STGY_ANY); 213 break; 214 case 'r': 215 db_printf("%+11lr", (long)addr); 216 break; 217 case 'x': 218 db_printf("%8lx", (unsigned long)addr); 219 break; 220 case 'z': 221 { 222 char tbuf[24]; 223 224 db_format_hex(tbuf, 24, addr, FALSE); 225 db_printf("%8s", tbuf); 226 break; 227 } 228 case 'd': 229 db_printf("%11ld", (long)addr); 230 break; 231 case 'u': 232 db_printf("%11lu", (unsigned long)addr); 233 break; 234 case 'o': 235 db_printf("%16lo", (unsigned long)addr); 236 break; 237 case 'c': 238 value = addr & 0xFF; 239 if (value >= ' ' && value <= '~') 240 db_printf("%c", (int)value); 241 else 242 db_printf("\\%03o", (int)value); 243 break; 244 } 245 db_printf("\n"); 246 } 247 248 void 249 db_print_loc_and_inst(db_addr_t loc, db_regs_t *regs) 250 { 251 db_printsym(loc, DB_STGY_PROC); 252 db_printf(":\t"); 253 db_disasm(loc, TRUE, regs); 254 } 255 256 /* 257 * Search for a value in memory. 258 * Syntax: search [/bhl] addr value [mask] [,count] 259 */ 260 void 261 db_search_cmd(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, 262 char *dummy4) 263 { 264 int t; 265 db_addr_t addr; 266 int size; 267 db_expr_t value; 268 db_expr_t mask; 269 db_expr_t count; 270 271 t = db_read_token(); 272 if (t == tSLASH) { 273 t = db_read_token(); 274 if (t != tIDENT) { 275 bad_modifier: 276 db_printf("Bad modifier\n"); 277 db_flush_lex(); 278 return; 279 } 280 281 if (!strcmp(db_tok_string, "b")) 282 size = 1; 283 else if (!strcmp(db_tok_string, "h")) 284 size = 2; 285 else if (!strcmp(db_tok_string, "l")) 286 size = 4; 287 else 288 goto bad_modifier; 289 } else { 290 db_unread_token(t); 291 size = 4; 292 } 293 294 if (!db_expression((db_expr_t *)&addr)) { 295 db_printf("Address missing\n"); 296 db_flush_lex(); 297 return; 298 } 299 300 if (!db_expression(&value)) { 301 db_printf("Value missing\n"); 302 db_flush_lex(); 303 return; 304 } 305 306 if (!db_expression(&mask)) 307 mask = 0xffffffffUL; 308 309 t = db_read_token(); 310 if (t == tCOMMA) { 311 if (!db_expression(&count)) { 312 db_printf("Count missing\n"); 313 db_flush_lex(); 314 return; 315 } 316 } else { 317 db_unread_token(t); 318 count = -1; /* effectively forever */ 319 } 320 db_skip_to_eol(); 321 322 db_search(addr, size, value, mask, count); 323 } 324 325 static void 326 db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, 327 unsigned int count) 328 { 329 while (count-- != 0) { 330 db_prev = addr; 331 if ((db_get_value(addr, size, FALSE) & mask) == value) 332 break; 333 addr += size; 334 } 335 db_next = addr; 336 } 337