db_examine.c revision 1.16
1 /* $NetBSD: db_examine.c,v 1.16 1999/05/31 06:53:45 ross 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 register 75 db_addr_t addr; 76 char * fmt; /* format string */ 77 int count; /* repeat count */ 78 { 79 int c; 80 db_expr_t value; 81 int size; 82 int width; 83 char * fp; 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); 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_printf("%-*lr", width, value); 120 break; 121 case 'x': /* unsigned hex */ 122 value = db_get_value(addr, size, FALSE); 123 addr += size; 124 db_printf("%-*lx", width, value); 125 break; 126 case 'z': /* signed hex */ 127 value = db_get_value(addr, size, TRUE); 128 addr += size; 129 db_printf("%-*lz", width, value); 130 break; 131 case 'd': /* signed decimal */ 132 value = db_get_value(addr, size, TRUE); 133 addr += size; 134 db_printf("%-*ld", width, value); 135 break; 136 case 'u': /* unsigned decimal */ 137 value = db_get_value(addr, size, FALSE); 138 addr += size; 139 db_printf("%-*lu", width, value); 140 break; 141 case 'o': /* unsigned octal */ 142 value = db_get_value(addr, size, FALSE); 143 addr += size; 144 db_printf("%-*lo", width, value); 145 break; 146 case 'c': /* character */ 147 value = db_get_value(addr, 1, FALSE); 148 addr += 1; 149 if (value >= ' ' && value <= '~') 150 db_printf("%c", (char)value); 151 else 152 db_printf("\\%03lo", value); 153 break; 154 case 's': /* null-terminated string */ 155 for (;;) { 156 value = db_get_value(addr, 1, FALSE); 157 addr += 1; 158 if (value == 0) 159 break; 160 if (value >= ' ' && value <= '~') 161 db_printf("%c", (char)value); 162 else 163 db_printf("\\%03lo", value); 164 } 165 break; 166 case 'i': /* instruction */ 167 addr = db_disasm(addr, FALSE); 168 break; 169 case 'I': /* instruction, alternate form */ 170 addr = db_disasm(addr, TRUE); 171 break; 172 default: 173 break; 174 } 175 if (db_print_position() != 0) 176 db_end_line(); 177 } 178 } 179 db_next = addr; 180 } 181 182 /* 183 * Print value. 184 */ 185 char db_print_format = 'x'; 186 187 /*ARGSUSED*/ 188 void 189 db_print_cmd(addr, have_addr, count, modif) 190 db_expr_t addr; 191 int have_addr; 192 db_expr_t count; 193 char * modif; 194 { 195 db_expr_t value; 196 197 if (modif[0] != '\0') 198 db_print_format = modif[0]; 199 200 switch (db_print_format) { 201 case 'a': 202 db_printsym((db_addr_t)addr, DB_STGY_ANY); 203 break; 204 case 'r': 205 db_printf("%11lr", addr); 206 break; 207 case 'x': 208 db_printf("%8lx", addr); 209 break; 210 case 'z': 211 db_printf("%8lz", addr); 212 break; 213 case 'd': 214 db_printf("%11ld", addr); 215 break; 216 case 'u': 217 db_printf("%11lu", addr); 218 break; 219 case 'o': 220 db_printf("%16lo", addr); 221 break; 222 case 'c': 223 value = addr & 0xFF; 224 if (value >= ' ' && value <= '~') 225 db_printf("%c", (char)value); 226 else 227 db_printf("\\%03lo", value); 228 break; 229 } 230 db_printf("\n"); 231 } 232 233 void 234 db_print_loc_and_inst(loc) 235 db_addr_t loc; 236 { 237 db_printsym(loc, DB_STGY_PROC); 238 db_printf(":\t"); 239 (void) db_disasm(loc, FALSE); 240 } 241 242 void 243 db_strcpy(dst, src) 244 register char *dst; 245 register char *src; 246 { 247 while ((*dst++ = *src++) != '\0') 248 ; 249 } 250 251 /* 252 * Search for a value in memory. 253 * Syntax: search [/bhl] addr value [mask] [,count] 254 */ 255 /*ARGSUSED*/ 256 void 257 db_search_cmd(daddr, have_addr, dcount, modif) 258 db_expr_t daddr; 259 int have_addr; 260 db_expr_t dcount; 261 char * modif; 262 { 263 int t; 264 db_addr_t addr; 265 int size; 266 db_expr_t value; 267 db_expr_t mask; 268 db_expr_t count; 269 270 t = db_read_token(); 271 if (t == tSLASH) { 272 t = db_read_token(); 273 if (t != tIDENT) { 274 bad_modifier: 275 db_printf("Bad modifier\n"); 276 db_flush_lex(); 277 return; 278 } 279 280 if (!strcmp(db_tok_string, "b")) 281 size = 1; 282 else if (!strcmp(db_tok_string, "h")) 283 size = 2; 284 else if (!strcmp(db_tok_string, "l")) 285 size = 4; 286 else 287 goto bad_modifier; 288 } else { 289 db_unread_token(t); 290 size = 4; 291 } 292 293 if (!db_expression(&value)) { 294 db_printf("Address missing\n"); 295 db_flush_lex(); 296 return; 297 } 298 addr = (db_addr_t) value; 299 300 if (!db_expression(&value)) { 301 db_printf("Value missing\n"); 302 db_flush_lex(); 303 return; 304 } 305 306 if (!db_expression(&mask)) 307 mask = (int) ~0; 308 309 t = db_read_token(); 310 if (t == tCOMMA) { 311 if (!db_expression(&count)) { 312 db_printf("Count missing\n"); 313 db_flush_lex(); 314 return; 315 } 316 } else { 317 db_unread_token(t); 318 count = -1; /* effectively forever */ 319 } 320 db_skip_to_eol(); 321 322 db_search(addr, size, value, mask, count); 323 } 324 325 void 326 db_search(addr, size, value, mask, count) 327 register 328 db_addr_t addr; 329 int size; 330 db_expr_t value; 331 db_expr_t mask; 332 unsigned int count; 333 { 334 while (count-- != 0) { 335 db_prev = addr; 336 if ((db_get_value(addr, size, FALSE) & mask) == value) 337 break; 338 addr += size; 339 } 340 db_next = addr; 341 } 342
Indexes created Tue Sep 23 07:09:52 GMT 2025