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_format_radix(tbuf, 24, value, FALSE); 129 db_printf("%-*s", width, tbuf); 130 break; 131 case 'x': /* unsigned hex */ 132 value = db_get_value(addr, size, FALSE); 133 addr += size; 134 db_printf("%-*lx", width, (long)value); 135 break; 136 case 'z': /* signed hex */ 137 value = db_get_value(addr, size, TRUE); 138 addr += size; 139 db_format_hex(tbuf, 24, value, FALSE); 140 db_printf("%-*s", width, tbuf); 141 break; 142 case 'd': /* signed decimal */ 143 value = db_get_value(addr, size, TRUE); 144 addr += size; 145 db_printf("%-*ld", width, (long)value); 146 break; 147 case 'u': /* unsigned decimal */ 148 value = db_get_value(addr, size, FALSE); 149 addr += size; 150 db_printf("%-*lu", width, (long)value); 151 break; 152 case 'o': /* unsigned octal */ 153 value = db_get_value(addr, size, FALSE); 154 addr += size; 155 db_printf("%-*lo", width, (long)value); 156 break; 157 case 'c': /* character */ 158 value = db_get_value(addr, 1, FALSE); 159 addr += 1; 160 if (value >= ' ' && value <= '~') 161 db_printf("%c", (int)value); 162 else 163 db_printf("\\%03o", (int)value); 164 break; 165 case 's': /* null-terminated string */ 166 for (;;) { 167 value = db_get_value(addr, 1, FALSE); 168 addr += 1; 169 if (value == 0) 170 break; 171 if (value >= ' ' && value <= '~') 172 db_printf("%c", (int)value); 173 else 174 db_printf("\\%03o", (int)value); 175 } 176 break; 177 case 'i': /* instruction */ 178 addr = db_disasm(addr, FALSE, NULL); 179 break; 180 case 'I': /* instruction, alternate form */ 181 addr = db_disasm(addr, TRUE, NULL); 182 break; 183 default: 184 break; 185 } 186 if (db_print_position() != 0 || 187 c == 'a' || c == 'p') { 188 db_end_line(1); 189 } 190 break; 191 } 192 } 193 } 194 db_next = addr; 195 } 196 197 /* 198 * Print value. 199 */ 200 static char db_print_format = 'x'; 201 202 /*ARGSUSED*/ 203 void 204 db_print_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, 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 { 217 char tbuf[24]; 218 219 db_format_radix(tbuf, 24, addr, FALSE); 220 db_printf("%11s", tbuf); 221 break; 222 } 223 case 'x': 224 db_printf("%8lx", (unsigned long)addr); 225 break; 226 case 'z': 227 { 228 char tbuf[24]; 229 230 db_format_hex(tbuf, 24, addr, FALSE); 231 db_printf("%8s", tbuf); 232 break; 233 } 234 case 'd': 235 db_printf("%11ld", (long)addr); 236 break; 237 case 'u': 238 db_printf("%11lu", (unsigned long)addr); 239 break; 240 case 'o': 241 db_printf("%16lo", (unsigned long)addr); 242 break; 243 case 'c': 244 value = addr & 0xFF; 245 if (value >= ' ' && value <= '~') 246 db_printf("%c", (int)value); 247 else 248 db_printf("\\%03o", (int)value); 249 break; 250 } 251 db_printf("\n"); 252 } 253 254 void 255 db_print_loc_and_inst(db_addr_t loc, db_regs_t *regs) 256 { 257 db_printsym(loc, DB_STGY_PROC); 258 db_printf(":\t"); 259 db_disasm(loc, TRUE, regs); 260 } 261 262 /* 263 * Search for a value in memory. 264 * Syntax: search [/bhl] addr value [mask] [,count] 265 */ 266 void 267 db_search_cmd(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, 268 char *dummy4) 269 { 270 int t; 271 db_addr_t addr; 272 int size; 273 db_expr_t value; 274 db_expr_t mask; 275 db_expr_t count; 276 277 t = db_read_token(); 278 if (t == tSLASH) { 279 t = db_read_token(); 280 if (t != tIDENT) { 281 bad_modifier: 282 db_printf("Bad modifier\n"); 283 db_flush_lex(); 284 return; 285 } 286 287 if (!strcmp(db_tok_string, "b")) 288 size = 1; 289 else if (!strcmp(db_tok_string, "h")) 290 size = 2; 291 else if (!strcmp(db_tok_string, "l")) 292 size = 4; 293 else 294 goto bad_modifier; 295 } else { 296 db_unread_token(t); 297 size = 4; 298 } 299 300 if (!db_expression((db_expr_t *)&addr)) { 301 db_printf("Address missing\n"); 302 db_flush_lex(); 303 return; 304 } 305 306 if (!db_expression(&value)) { 307 db_printf("Value missing\n"); 308 db_flush_lex(); 309 return; 310 } 311 312 if (!db_expression(&mask)) 313 mask = 0xffffffffUL; 314 315 t = db_read_token(); 316 if (t == tCOMMA) { 317 if (!db_expression(&count)) { 318 db_printf("Count missing\n"); 319 db_flush_lex(); 320 return; 321 } 322 } else { 323 db_unread_token(t); 324 count = -1; /* effectively forever */ 325 } 326 db_skip_to_eol(); 327 328 db_search(addr, size, value, mask, count); 329 } 330 331 static void 332 db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, 333 unsigned int count) 334 { 335 while (count-- != 0) { 336 db_prev = addr; 337 if ((db_get_value(addr, size, FALSE) & mask) == value) 338 break; 339 addr += size; 340 } 341 db_next = addr; 342 } 343