db_examine.c revision 1.35.32.1
1 /* $NetBSD: db_examine.c,v 1.35.32.1 2015/09/22 12:05:56 skrll 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 1.35.32.1 2015/09/22 12:05:56 skrll Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/buf.h> 38 #include <sys/proc.h> 39 40 #include <ddb/ddb.h> 41 42 static char db_examine_format[TOK_STRING_SIZE] = "x"; 43 44 static void db_examine(db_addr_t, char *, int); 45 static void db_search(db_addr_t, int, db_expr_t, db_expr_t, unsigned int); 46 47 /* 48 * Examine (print) data. Syntax is: 49 * x/[bhl][cdiorsuxz]* 50 * For example, the command: 51 * x/bxxxx 52 * should print: 53 * address: 01 23 45 67 54 */ 55 /*ARGSUSED*/ 56 void 57 db_examine_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 58 const char *modif) 59 { 60 if (modif[0] != '\0') 61 strlcpy(db_examine_format, modif, sizeof(db_examine_format)); 62 63 if (count == -1) 64 count = 1; 65 66 db_examine((db_addr_t) addr, db_examine_format, count); 67 } 68 69 static void 70 db_examine(db_addr_t addr, char *fmt, int count) 71 { 72 int i, c; 73 db_expr_t value; 74 int size; 75 int width; 76 int bytes; 77 char * fp; 78 char tbuf[24]; 79 80 while (--count >= 0) { 81 fp = fmt; 82 size = 4; 83 width = 12; 84 while ((c = *fp++) != 0) { 85 if (db_print_position() == 0) { 86 /* Always print the address. */ 87 db_printsym(addr, DB_STGY_ANY, db_printf); 88 db_printf(":\t"); 89 db_prev = addr; 90 } 91 switch (c) { 92 case 'b': /* byte */ 93 size = 1; 94 width = 4; 95 break; 96 case 'h': /* half-word */ 97 size = 2; 98 width = 8; 99 break; 100 case 'l': /* long-word */ 101 size = 4; 102 width = 12; 103 break; 104 case 'q': 105 if (sizeof(db_expr_t) != sizeof(uint64_t)) { 106 size = -1; 107 db_error("q not supported\n"); 108 /*NOTREACHED*/ 109 } 110 case 'L': /* implementation maximum */ 111 size = sizeof value; 112 width = 12 * (sizeof value / 4); 113 break; 114 case 'a': /* address */ 115 db_printf("= 0x%lx\n", (long)addr); 116 break; 117 case 'r': /* signed, current radix */ 118 value = db_get_value(addr, size, true); 119 addr += size; 120 db_format_radix(tbuf, 24, value, false); 121 db_printf("%-*s", width, tbuf); 122 break; 123 case 'x': /* unsigned hex */ 124 value = db_get_value(addr, size, false); 125 addr += size; 126 db_printf("%-*" DDB_EXPR_FMT "x", width, value); 127 break; 128 case 'm': /* hex dump */ 129 /* 130 * Print off in chunks of size. Try to print 16 131 * bytes at a time into 4 columns. This 132 * loops modify's count extra times in order 133 * to get the nicely formatted lines. 134 */ 135 136 bytes = 0; 137 do { 138 for (i = 0; i < size; i++) { 139 value = 140 db_get_value(addr+bytes, 1, 141 false); 142 db_printf( 143 "%02" DDB_EXPR_FMT "x", 144 value); 145 bytes++; 146 if (!(bytes % 4)) 147 db_printf(" "); 148 } 149 } while ((bytes != 16) && count--); 150 /* True up the columns before continuing */ 151 for (i = 4; i >= (bytes / 4); i--) 152 db_printf ("\t"); 153 /* Print chars, use . for non-printable's. */ 154 while (bytes--) { 155 value = db_get_value(addr, 1, false); 156 addr += 1; 157 if (value >= ' ' && value <= '~') 158 db_printf("%c", (char)value); 159 else 160 db_printf("."); 161 } 162 db_printf("\n"); 163 break; 164 case 'z': /* signed hex */ 165 value = db_get_value(addr, size, true); 166 addr += size; 167 db_format_hex(tbuf, 24, value, false); 168 db_printf("%-*s", width, tbuf); 169 break; 170 case 'd': /* signed decimal */ 171 value = db_get_value(addr, size, true); 172 addr += size; 173 db_printf("%-*" DDB_EXPR_FMT "d", width, value); 174 break; 175 case 'u': /* unsigned decimal */ 176 value = db_get_value(addr, size, false); 177 addr += size; 178 db_printf("%-*" DDB_EXPR_FMT "u", width, value); 179 break; 180 case 'o': /* unsigned octal */ 181 value = db_get_value(addr, size, false); 182 addr += size; 183 db_printf("%-*" DDB_EXPR_FMT "o", width, value); 184 break; 185 case 'c': /* character */ 186 value = db_get_value(addr, 1, false); 187 addr += 1; 188 if (value >= ' ' && value <= '~') 189 db_printf("%c", (char)value); 190 else 191 db_printf("\\%03o", (int)value); 192 break; 193 case 's': /* null-terminated string */ 194 for (;;) { 195 value = db_get_value(addr, 1, false); 196 addr += 1; 197 if (value == 0) 198 break; 199 if (value >= ' ' && value <= '~') 200 db_printf("%c", (char)value); 201 else 202 db_printf("\\%03o", (int)value); 203 } 204 break; 205 case 'i': /* instruction */ 206 addr = db_disasm(addr, false); 207 break; 208 case 'I': /* instruction, alternate form */ 209 addr = db_disasm(addr, true); 210 break; 211 default: 212 break; 213 } 214 if (db_print_position() != 0) 215 db_end_line(); 216 } 217 } 218 db_next = addr; 219 } 220 221 /* 222 * Print value. 223 */ 224 static char db_print_format = 'x'; 225 226 /*ARGSUSED*/ 227 void 228 db_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, 229 const char *modif) 230 { 231 db_expr_t value; 232 233 if (modif[0] != '\0') 234 db_print_format = modif[0]; 235 236 switch (db_print_format) { 237 case 'a': 238 db_printsym((db_addr_t)addr, DB_STGY_ANY, db_printf); 239 break; 240 case 'r': 241 { 242 char tbuf[24]; 243 244 db_format_radix(tbuf, 24, addr, false); 245 db_printf("%11s", tbuf); 246 break; 247 } 248 case 'x': 249 db_printf("%16" DDB_EXPR_FMT "x", addr); 250 break; 251 case 'z': 252 { 253 char tbuf[24]; 254 255 db_format_hex(tbuf, 24, addr, false); 256 db_printf("%8s", tbuf); 257 break; 258 } 259 case 'd': 260 db_printf("%11" DDB_EXPR_FMT "d", addr); 261 break; 262 case 'u': 263 db_printf("%11" DDB_EXPR_FMT "u", addr); 264 break; 265 case 'o': 266 db_printf("%15" DDB_EXPR_FMT "o", addr); 267 break; 268 case 'c': 269 value = addr & 0xFF; 270 if (value >= ' ' && value <= '~') 271 db_printf("%c", (char)value); 272 else 273 db_printf("\\%03o", (int)value); 274 break; 275 } 276 db_printf("\n"); 277 } 278 279 void 280 db_print_loc_and_inst(db_addr_t loc) 281 { 282 283 db_printsym(loc, DB_STGY_PROC, db_printf); 284 db_printf(":\t"); 285 (void) db_disasm(loc, false); 286 } 287 288 /* 289 * Search for a value in memory. 290 * Syntax: search [/bhl] addr value [mask] [,count] 291 */ 292 /*ARGSUSED*/ 293 void 294 db_search_cmd(db_expr_t daddr, bool have_addr, 295 db_expr_t dcount, const char *modif) 296 { 297 int t; 298 db_addr_t addr; 299 int size; 300 db_expr_t value; 301 db_expr_t mask; 302 db_expr_t count; 303 304 t = db_read_token(); 305 if (t == tSLASH) { 306 t = db_read_token(); 307 if (t != tIDENT) { 308 bad_modifier: 309 db_printf("Bad modifier\n"); 310 db_flush_lex(); 311 return; 312 } 313 314 if (!strcmp(db_tok_string, "b")) 315 size = 1; 316 else if (!strcmp(db_tok_string, "h")) 317 size = 2; 318 else if (!strcmp(db_tok_string, "l")) 319 size = 4; 320 else 321 goto bad_modifier; 322 } else { 323 db_unread_token(t); 324 size = 4; 325 } 326 327 if (!db_expression(&value)) { 328 db_printf("Address missing\n"); 329 db_flush_lex(); 330 return; 331 } 332 addr = (db_addr_t) value; 333 334 if (!db_expression(&value)) { 335 db_printf("Value missing\n"); 336 db_flush_lex(); 337 return; 338 } 339 340 if (!db_expression(&mask)) 341 mask = (int) ~0; 342 343 t = db_read_token(); 344 if (t == tCOMMA) { 345 if (!db_expression(&count)) { 346 db_printf("Count missing\n"); 347 db_flush_lex(); 348 return; 349 } 350 } else { 351 db_unread_token(t); 352 count = -1; /* effectively forever */ 353 } 354 db_skip_to_eol(); 355 356 db_search(addr, size, value, mask, count); 357 } 358 359 static void 360 db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, 361 unsigned int count) 362 { 363 while (count-- != 0) { 364 db_prev = addr; 365 if ((db_get_value(addr, size, false) & mask) == value) 366 break; 367 addr += size; 368 } 369 db_next = addr; 370 } 371
Indexes created Fri Oct 03 15:10:06 GMT 2025