db_examine.c revision 1.32
1 /* $NetBSD: db_examine.c,v 1.32 2007/02/22 06:41:00 thorpej 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 1.32 2007/02/22 06:41:00 thorpej 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 static char db_examine_format[TOK_STRING_SIZE] = "x"; 50 51 static void db_examine(db_addr_t, char *, int); 52 static void db_search(db_addr_t, int, db_expr_t, db_expr_t, unsigned int); 53 54 /* 55 * Examine (print) data. Syntax is: 56 * x/[bhl][cdiorsuxz]* 57 * For example, the command: 58 * x/bxxxx 59 * should print: 60 * address: 01 23 45 67 61 */ 62 /*ARGSUSED*/ 63 void 64 db_examine_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 65 const char *modif) 66 { 67 if (modif[0] != '\0') 68 strlcpy(db_examine_format, modif, sizeof(db_examine_format)); 69 70 if (count == -1) 71 count = 1; 72 73 db_examine((db_addr_t) addr, db_examine_format, count); 74 } 75 76 static void 77 db_examine(db_addr_t addr, char *fmt, int count) 78 { 79 int i, c; 80 db_expr_t value; 81 int size; 82 int width; 83 int bytes; 84 char * fp; 85 char tbuf[24]; 86 87 while (--count >= 0) { 88 fp = fmt; 89 size = 4; 90 width = 12; 91 while ((c = *fp++) != 0) { 92 if (db_print_position() == 0) { 93 /* Always print the address. */ 94 db_printsym(addr, DB_STGY_ANY, db_printf); 95 db_printf(":\t"); 96 db_prev = addr; 97 } 98 switch (c) { 99 case 'b': /* byte */ 100 size = 1; 101 width = 4; 102 break; 103 case 'h': /* half-word */ 104 size = 2; 105 width = 8; 106 break; 107 case 'l': /* long-word */ 108 size = 4; 109 width = 12; 110 break; 111 case 'L': /* implementation maximum */ 112 size = sizeof value; 113 width = 12 * (sizeof value / 4); 114 break; 115 case 'a': /* address */ 116 db_printf("= 0x%lx\n", (long)addr); 117 break; 118 case 'r': /* signed, current radix */ 119 value = db_get_value(addr, size, true); 120 addr += size; 121 db_format_radix(tbuf, 24, value, false); 122 db_printf("%-*s", width, tbuf); 123 break; 124 case 'x': /* unsigned hex */ 125 value = db_get_value(addr, size, false); 126 addr += size; 127 db_printf(DB_EXPR_T_IS_QUAD ? "%-*qx" : "%-*lx", 128 width, value); 129 break; 130 case 'm': /* hex dump */ 131 /* 132 * Print off in chunks of size. Try to print 16 133 * bytes at a time into 4 columns. This 134 * loops modify's count extra times in order 135 * to get the nicely formatted lines. 136 */ 137 138 bytes = 0; 139 do { 140 for (i = 0; i < size; i++) { 141 value = 142 db_get_value(addr+bytes, 1, 143 false); 144 db_printf( 145 DB_EXPR_T_IS_QUAD ? "%02qx": 146 "%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(DB_EXPR_T_IS_QUAD ? "%-*qd" : "%-*ld", 176 width, value); 177 break; 178 case 'u': /* unsigned decimal */ 179 value = db_get_value(addr, size, false); 180 addr += size; 181 db_printf(DB_EXPR_T_IS_QUAD ? "%-*qu" : "%-*lu", 182 width, value); 183 break; 184 case 'o': /* unsigned octal */ 185 value = db_get_value(addr, size, false); 186 addr += size; 187 db_printf(DB_EXPR_T_IS_QUAD ? "%-*qo" : "%-*lo", 188 width, value); 189 break; 190 case 'c': /* character */ 191 value = db_get_value(addr, 1, false); 192 addr += 1; 193 if (value >= ' ' && value <= '~') 194 db_printf("%c", (char)value); 195 else 196 db_printf("\\%03o", (int)value); 197 break; 198 case 's': /* null-terminated string */ 199 for (;;) { 200 value = db_get_value(addr, 1, false); 201 addr += 1; 202 if (value == 0) 203 break; 204 if (value >= ' ' && value <= '~') 205 db_printf("%c", (char)value); 206 else 207 db_printf("\\%03o", (int)value); 208 } 209 break; 210 case 'i': /* instruction */ 211 addr = db_disasm(addr, false); 212 break; 213 case 'I': /* instruction, alternate form */ 214 addr = db_disasm(addr, true); 215 break; 216 default: 217 break; 218 } 219 if (db_print_position() != 0) 220 db_end_line(); 221 } 222 } 223 db_next = addr; 224 } 225 226 /* 227 * Print value. 228 */ 229 static char db_print_format = 'x'; 230 231 /*ARGSUSED*/ 232 void 233 db_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 234 const 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(DB_EXPR_T_IS_QUAD ? "%16qx" : "%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(DB_EXPR_T_IS_QUAD ? "%11qd" : "%11ld", addr); 266 break; 267 case 'u': 268 db_printf(DB_EXPR_T_IS_QUAD ? "%11qu" : "%11lu", addr); 269 break; 270 case 'o': 271 db_printf(DB_EXPR_T_IS_QUAD ? "%15qo" : "%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("\\%03o", (int)value); 279 break; 280 } 281 db_printf("\n"); 282 } 283 284 void 285 db_print_loc_and_inst(db_addr_t loc) 286 { 287 288 db_printsym(loc, DB_STGY_PROC, db_printf); 289 db_printf(":\t"); 290 (void) db_disasm(loc, false); 291 } 292 293 /* 294 * Search for a value in memory. 295 * Syntax: search [/bhl] addr value [mask] [,count] 296 */ 297 /*ARGSUSED*/ 298 void 299 db_search_cmd(db_expr_t daddr, bool have_addr, 300 db_expr_t dcount, const char *modif) 301 { 302 int t; 303 db_addr_t addr; 304 int size; 305 db_expr_t value; 306 db_expr_t mask; 307 db_expr_t count; 308 309 t = db_read_token(); 310 if (t == tSLASH) { 311 t = db_read_token(); 312 if (t != tIDENT) { 313 bad_modifier: 314 db_printf("Bad modifier\n"); 315 db_flush_lex(); 316 return; 317 } 318 319 if (!strcmp(db_tok_string, "b")) 320 size = 1; 321 else if (!strcmp(db_tok_string, "h")) 322 size = 2; 323 else if (!strcmp(db_tok_string, "l")) 324 size = 4; 325 else 326 goto bad_modifier; 327 } else { 328 db_unread_token(t); 329 size = 4; 330 } 331 332 if (!db_expression(&value)) { 333 db_printf("Address missing\n"); 334 db_flush_lex(); 335 return; 336 } 337 addr = (db_addr_t) value; 338 339 if (!db_expression(&value)) { 340 db_printf("Value missing\n"); 341 db_flush_lex(); 342 return; 343 } 344 345 if (!db_expression(&mask)) 346 mask = (int) ~0; 347 348 t = db_read_token(); 349 if (t == tCOMMA) { 350 if (!db_expression(&count)) { 351 db_printf("Count missing\n"); 352 db_flush_lex(); 353 return; 354 } 355 } else { 356 db_unread_token(t); 357 count = -1; /* effectively forever */ 358 } 359 db_skip_to_eol(); 360 361 db_search(addr, size, value, mask, count); 362 } 363 364 static void 365 db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, 366 unsigned int count) 367 { 368 while (count-- != 0) { 369 db_prev = addr; 370 if ((db_get_value(addr, size, false) & mask) == value) 371 break; 372 addr += size; 373 } 374 db_next = addr; 375 } 376
Indexes created Tue Sep 23 22:09:46 GMT 2025