db_examine.c revision 1.22
1 /* $NetBSD: db_examine.c,v 1.22 2001/11/12 22:54:04 lukem Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 * 28 * Author: David B. Golub, Carnegie Mellon University 29 * Date: 7/90 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: db_examine.c,v 1.22 2001/11/12 22:54:04 lukem Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 39 #include <machine/db_machdep.h> /* type definitions */ 40 41 #include <ddb/db_lex.h> 42 #include <ddb/db_output.h> 43 #include <ddb/db_command.h> 44 #include <ddb/db_sym.h> 45 #include <ddb/db_access.h> 46 #include <ddb/db_extern.h> 47 #include <ddb/db_interface.h> 48 49 char db_examine_format[TOK_STRING_SIZE] = "x"; 50 51 /* 52 * Examine (print) data. Syntax is: 53 * x/[bhl][cdiorsuxz]* 54 * For example, the command: 55 * x/bxxxx 56 * should print: 57 * address: 01 23 45 67 58 */ 59 /*ARGSUSED*/ 60 void 61 db_examine_cmd(addr, have_addr, count, modif) 62 db_expr_t addr; 63 int have_addr; 64 db_expr_t count; 65 char * modif; 66 { 67 if (modif[0] != '\0') 68 db_strcpy(db_examine_format, modif); 69 70 if (count == -1) 71 count = 1; 72 73 db_examine((db_addr_t) addr, db_examine_format, count); 74 } 75 76 void 77 db_examine(addr, fmt, count) 78 db_addr_t addr; 79 char * fmt; /* format string */ 80 int count; /* repeat count */ 81 { 82 int i, c; 83 db_expr_t value; 84 int size; 85 int width; 86 int bytes; 87 char * fp; 88 char tbuf[24]; 89 90 while (--count >= 0) { 91 fp = fmt; 92 size = 4; 93 width = 12; 94 while ((c = *fp++) != 0) { 95 if (db_print_position() == 0) { 96 /* Always print the address. */ 97 db_printsym(addr, DB_STGY_ANY, db_printf); 98 db_printf(":\t"); 99 db_prev = addr; 100 } 101 switch (c) { 102 case 'b': /* byte */ 103 size = 1; 104 width = 4; 105 break; 106 case 'h': /* half-word */ 107 size = 2; 108 width = 8; 109 break; 110 case 'l': /* long-word */ 111 size = 4; 112 width = 12; 113 break; 114 case 'L': /* implementation maximum */ 115 size = sizeof value; 116 width = 12 * (sizeof value / 4); 117 break; 118 case 'a': /* address */ 119 db_printf("= 0x%lx\n", addr); 120 break; 121 case 'r': /* signed, current radix */ 122 value = db_get_value(addr, size, TRUE); 123 addr += size; 124 db_format_radix(tbuf, 24, value, FALSE); 125 db_printf("%-*s", width, tbuf); 126 break; 127 case 'x': /* unsigned hex */ 128 value = db_get_value(addr, size, FALSE); 129 addr += size; 130 db_printf("%-*lx", width, value); 131 break; 132 case 'm': /* hex dump */ 133 /* 134 * Print off in chunks of size. Try to print 16 135 * bytes at a time into 4 columns. This 136 * loops modify's count extra times in order 137 * to get the nicely formatted lines. 138 */ 139 140 bytes = 0; 141 do { 142 for (i = 0; i < size; i++) { 143 value = 144 db_get_value(addr+bytes, 1, 145 FALSE); 146 db_printf("%02lx", value); 147 bytes++; 148 if (!(bytes % 4)) 149 db_printf(" "); 150 } 151 } while ((bytes != 16) && count--); 152 /* True up the columns before continuing */ 153 for (i = 4; i >= (bytes / 4); i--) 154 db_printf ("\t"); 155 /* Print chars, use . for non-printable's. */ 156 while (bytes--) { 157 value = db_get_value(addr, 1, FALSE); 158 addr += 1; 159 if (value >= ' ' && value <= '~') 160 db_printf("%c", (char)value); 161 else 162 db_printf("."); 163 } 164 db_printf("\n"); 165 break; 166 case 'z': /* signed hex */ 167 value = db_get_value(addr, size, TRUE); 168 addr += size; 169 db_format_hex(tbuf, 24, value, FALSE); 170 db_printf("%-*s", width, tbuf); 171 break; 172 case 'd': /* signed decimal */ 173 value = db_get_value(addr, size, TRUE); 174 addr += size; 175 db_printf("%-*ld", width, value); 176 break; 177 case 'u': /* unsigned decimal */ 178 value = db_get_value(addr, size, FALSE); 179 addr += size; 180 db_printf("%-*lu", width, value); 181 break; 182 case 'o': /* unsigned octal */ 183 value = db_get_value(addr, size, FALSE); 184 addr += size; 185 db_printf("%-*lo", width, value); 186 break; 187 case 'c': /* character */ 188 value = db_get_value(addr, 1, FALSE); 189 addr += 1; 190 if (value >= ' ' && value <= '~') 191 db_printf("%c", (char)value); 192 else 193 db_printf("\\%03lo", value); 194 break; 195 case 's': /* null-terminated string */ 196 for (;;) { 197 value = db_get_value(addr, 1, FALSE); 198 addr += 1; 199 if (value == 0) 200 break; 201 if (value >= ' ' && value <= '~') 202 db_printf("%c", (char)value); 203 else 204 db_printf("\\%03lo", value); 205 } 206 break; 207 case 'i': /* instruction */ 208 addr = db_disasm(addr, FALSE); 209 break; 210 case 'I': /* instruction, alternate form */ 211 addr = db_disasm(addr, TRUE); 212 break; 213 default: 214 break; 215 } 216 if (db_print_position() != 0) 217 db_end_line(); 218 } 219 } 220 db_next = addr; 221 } 222 223 /* 224 * Print value. 225 */ 226 char db_print_format = 'x'; 227 228 /*ARGSUSED*/ 229 void 230 db_print_cmd(addr, have_addr, count, modif) 231 db_expr_t addr; 232 int have_addr; 233 db_expr_t count; 234 char * modif; 235 { 236 db_expr_t value; 237 238 if (modif[0] != '\0') 239 db_print_format = modif[0]; 240 241 switch (db_print_format) { 242 case 'a': 243 db_printsym((db_addr_t)addr, DB_STGY_ANY, db_printf); 244 break; 245 case 'r': 246 { 247 char tbuf[24]; 248 249 db_format_radix(tbuf, 24, addr, FALSE); 250 db_printf("%11s", tbuf); 251 break; 252 } 253 case 'x': 254 db_printf("%8lx", addr); 255 break; 256 case 'z': 257 { 258 char tbuf[24]; 259 260 db_format_hex(tbuf, 24, addr, FALSE); 261 db_printf("%8s", tbuf); 262 break; 263 } 264 case 'd': 265 db_printf("%11ld", addr); 266 break; 267 case 'u': 268 db_printf("%11lu", addr); 269 break; 270 case 'o': 271 db_printf("%16lo", addr); 272 break; 273 case 'c': 274 value = addr & 0xFF; 275 if (value >= ' ' && value <= '~') 276 db_printf("%c", (char)value); 277 else 278 db_printf("\\%03lo", value); 279 break; 280 } 281 db_printf("\n"); 282 } 283 284 void 285 db_print_loc_and_inst(loc) 286 db_addr_t loc; 287 { 288 db_printsym(loc, DB_STGY_PROC, db_printf); 289 db_printf(":\t"); 290 (void) db_disasm(loc, FALSE); 291 } 292 293 void 294 db_strcpy(dst, src) 295 char *dst; 296 char *src; 297 { 298 while ((*dst++ = *src++) != '\0') 299 ; 300 } 301 302 /* 303 * Search for a value in memory. 304 * Syntax: search [/bhl] addr value [mask] [,count] 305 */ 306 /*ARGSUSED*/ 307 void 308 db_search_cmd(daddr, have_addr, dcount, modif) 309 db_expr_t daddr; 310 int have_addr; 311 db_expr_t dcount; 312 char * modif; 313 { 314 int t; 315 db_addr_t addr; 316 int size; 317 db_expr_t value; 318 db_expr_t mask; 319 db_expr_t count; 320 321 t = db_read_token(); 322 if (t == tSLASH) { 323 t = db_read_token(); 324 if (t != tIDENT) { 325 bad_modifier: 326 db_printf("Bad modifier\n"); 327 db_flush_lex(); 328 return; 329 } 330 331 if (!strcmp(db_tok_string, "b")) 332 size = 1; 333 else if (!strcmp(db_tok_string, "h")) 334 size = 2; 335 else if (!strcmp(db_tok_string, "l")) 336 size = 4; 337 else 338 goto bad_modifier; 339 } else { 340 db_unread_token(t); 341 size = 4; 342 } 343 344 if (!db_expression(&value)) { 345 db_printf("Address missing\n"); 346 db_flush_lex(); 347 return; 348 } 349 addr = (db_addr_t) value; 350 351 if (!db_expression(&value)) { 352 db_printf("Value missing\n"); 353 db_flush_lex(); 354 return; 355 } 356 357 if (!db_expression(&mask)) 358 mask = (int) ~0; 359 360 t = db_read_token(); 361 if (t == tCOMMA) { 362 if (!db_expression(&count)) { 363 db_printf("Count missing\n"); 364 db_flush_lex(); 365 return; 366 } 367 } else { 368 db_unread_token(t); 369 count = -1; /* effectively forever */ 370 } 371 db_skip_to_eol(); 372 373 db_search(addr, size, value, mask, count); 374 } 375 376 void 377 db_search(addr, size, value, mask, count) 378 db_addr_t addr; 379 int size; 380 db_expr_t value; 381 db_expr_t mask; 382 unsigned int count; 383 { 384 while (count-- != 0) { 385 db_prev = addr; 386 if ((db_get_value(addr, size, FALSE) & mask) == value) 387 break; 388 addr += size; 389 } 390 db_next = addr; 391 } 392
Indexes created Wed Sep 24 05:09:52 GMT 2025