db_examine.c revision 1.19
1 /* $NetBSD: db_examine.c,v 1.19 2000/08/09 19:51:44 tv 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/param.h> 33 #include <sys/proc.h> 34 35 #include <machine/db_machdep.h> /* type definitions */ 36 37 #include <ddb/db_lex.h> 38 #include <ddb/db_output.h> 39 #include <ddb/db_command.h> 40 #include <ddb/db_sym.h> 41 #include <ddb/db_access.h> 42 #include <ddb/db_extern.h> 43 #include <ddb/db_interface.h> 44 45 char db_examine_format[TOK_STRING_SIZE] = "x"; 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(addr, have_addr, count, modif) 58 db_expr_t addr; 59 int have_addr; 60 db_expr_t count; 61 char * modif; 62 { 63 if (modif[0] != '\0') 64 db_strcpy(db_examine_format, modif); 65 66 if (count == -1) 67 count = 1; 68 69 db_examine((db_addr_t) addr, db_examine_format, count); 70 } 71 72 void 73 db_examine(addr, fmt, count) 74 db_addr_t addr; 75 char * fmt; /* format string */ 76 int count; /* repeat count */ 77 { 78 int c; 79 db_expr_t value; 80 int size; 81 int width; 82 char * fp; 83 char tbuf[24]; 84 85 while (--count >= 0) { 86 fp = fmt; 87 size = 4; 88 width = 12; 89 while ((c = *fp++) != 0) { 90 if (db_print_position() == 0) { 91 /* Always print the address. */ 92 db_printsym(addr, DB_STGY_ANY, db_printf); 93 db_printf(":\t"); 94 db_prev = addr; 95 } 96 switch (c) { 97 case 'b': /* byte */ 98 size = 1; 99 width = 4; 100 break; 101 case 'h': /* half-word */ 102 size = 2; 103 width = 8; 104 break; 105 case 'l': /* long-word */ 106 size = 4; 107 width = 12; 108 break; 109 case 'L': /* implementation maximum */ 110 size = sizeof value; 111 width = 12 * (sizeof value / 4); 112 break; 113 case 'a': /* address */ 114 db_printf("= 0x%lx\n", addr); 115 break; 116 case 'r': /* signed, current radix */ 117 value = db_get_value(addr, size, TRUE); 118 addr += size; 119 db_format_radix(tbuf, 24, value, FALSE); 120 db_printf("%-*s", width, tbuf); 121 break; 122 case 'x': /* unsigned hex */ 123 value = db_get_value(addr, size, FALSE); 124 addr += size; 125 db_printf("%-*lx", width, value); 126 break; 127 case 'z': /* signed hex */ 128 value = db_get_value(addr, size, TRUE); 129 addr += size; 130 db_format_hex(tbuf, 24, value, FALSE); 131 db_printf("%-*s", width, tbuf); 132 break; 133 case 'd': /* signed decimal */ 134 value = db_get_value(addr, size, TRUE); 135 addr += size; 136 db_printf("%-*ld", width, value); 137 break; 138 case 'u': /* unsigned decimal */ 139 value = db_get_value(addr, size, FALSE); 140 addr += size; 141 db_printf("%-*lu", width, value); 142 break; 143 case 'o': /* unsigned octal */ 144 value = db_get_value(addr, size, FALSE); 145 addr += size; 146 db_printf("%-*lo", width, value); 147 break; 148 case 'c': /* character */ 149 value = db_get_value(addr, 1, FALSE); 150 addr += 1; 151 if (value >= ' ' && value <= '~') 152 db_printf("%c", (char)value); 153 else 154 db_printf("\\%03lo", value); 155 break; 156 case 's': /* null-terminated string */ 157 for (;;) { 158 value = db_get_value(addr, 1, FALSE); 159 addr += 1; 160 if (value == 0) 161 break; 162 if (value >= ' ' && value <= '~') 163 db_printf("%c", (char)value); 164 else 165 db_printf("\\%03lo", value); 166 } 167 break; 168 case 'i': /* instruction */ 169 addr = db_disasm(addr, FALSE); 170 break; 171 case 'I': /* instruction, alternate form */ 172 addr = db_disasm(addr, TRUE); 173 break; 174 default: 175 break; 176 } 177 if (db_print_position() != 0) 178 db_end_line(); 179 } 180 } 181 db_next = addr; 182 } 183 184 /* 185 * Print value. 186 */ 187 char db_print_format = 'x'; 188 189 /*ARGSUSED*/ 190 void 191 db_print_cmd(addr, have_addr, count, modif) 192 db_expr_t addr; 193 int have_addr; 194 db_expr_t count; 195 char * modif; 196 { 197 db_expr_t value; 198 199 if (modif[0] != '\0') 200 db_print_format = modif[0]; 201 202 switch (db_print_format) { 203 case 'a': 204 db_printsym((db_addr_t)addr, DB_STGY_ANY, db_printf); 205 break; 206 case 'r': 207 { 208 char tbuf[24]; 209 210 db_format_radix(tbuf, 24, addr, FALSE); 211 db_printf("%11s", tbuf); 212 break; 213 } 214 case 'x': 215 db_printf("%8lx", addr); 216 break; 217 case 'z': 218 { 219 char tbuf[24]; 220 221 db_format_hex(tbuf, 24, addr, FALSE); 222 db_printf("%8s", tbuf); 223 break; 224 } 225 case 'd': 226 db_printf("%11ld", addr); 227 break; 228 case 'u': 229 db_printf("%11lu", addr); 230 break; 231 case 'o': 232 db_printf("%16lo", addr); 233 break; 234 case 'c': 235 value = addr & 0xFF; 236 if (value >= ' ' && value <= '~') 237 db_printf("%c", (char)value); 238 else 239 db_printf("\\%03lo", value); 240 break; 241 } 242 db_printf("\n"); 243 } 244 245 void 246 db_print_loc_and_inst(loc) 247 db_addr_t loc; 248 { 249 db_printsym(loc, DB_STGY_PROC, db_printf); 250 db_printf(":\t"); 251 (void) db_disasm(loc, FALSE); 252 } 253 254 void 255 db_strcpy(dst, src) 256 char *dst; 257 char *src; 258 { 259 while ((*dst++ = *src++) != '\0') 260 ; 261 } 262 263 /* 264 * Search for a value in memory. 265 * Syntax: search [/bhl] addr value [mask] [,count] 266 */ 267 /*ARGSUSED*/ 268 void 269 db_search_cmd(daddr, have_addr, dcount, modif) 270 db_expr_t daddr; 271 int have_addr; 272 db_expr_t dcount; 273 char * modif; 274 { 275 int t; 276 db_addr_t addr; 277 int size; 278 db_expr_t value; 279 db_expr_t mask; 280 db_expr_t count; 281 282 t = db_read_token(); 283 if (t == tSLASH) { 284 t = db_read_token(); 285 if (t != tIDENT) { 286 bad_modifier: 287 db_printf("Bad modifier\n"); 288 db_flush_lex(); 289 return; 290 } 291 292 if (!strcmp(db_tok_string, "b")) 293 size = 1; 294 else if (!strcmp(db_tok_string, "h")) 295 size = 2; 296 else if (!strcmp(db_tok_string, "l")) 297 size = 4; 298 else 299 goto bad_modifier; 300 } else { 301 db_unread_token(t); 302 size = 4; 303 } 304 305 if (!db_expression(&value)) { 306 db_printf("Address missing\n"); 307 db_flush_lex(); 308 return; 309 } 310 addr = (db_addr_t) value; 311 312 if (!db_expression(&value)) { 313 db_printf("Value missing\n"); 314 db_flush_lex(); 315 return; 316 } 317 318 if (!db_expression(&mask)) 319 mask = (int) ~0; 320 321 t = db_read_token(); 322 if (t == tCOMMA) { 323 if (!db_expression(&count)) { 324 db_printf("Count missing\n"); 325 db_flush_lex(); 326 return; 327 } 328 } else { 329 db_unread_token(t); 330 count = -1; /* effectively forever */ 331 } 332 db_skip_to_eol(); 333 334 db_search(addr, size, value, mask, count); 335 } 336 337 void 338 db_search(addr, size, value, mask, count) 339 db_addr_t addr; 340 int size; 341 db_expr_t value; 342 db_expr_t mask; 343 unsigned int count; 344 { 345 while (count-- != 0) { 346 db_prev = addr; 347 if ((db_get_value(addr, size, FALSE) & mask) == value) 348 break; 349 addr += size; 350 } 351 db_next = addr; 352 } 353
Indexes created Tue Sep 23 07:09:52 GMT 2025