db_examine.c revision 1.18
1 /* $NetBSD: db_examine.c,v 1.18 2000/05/25 19:57:36 jhawk 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 84 while (--count >= 0) { 85 fp = fmt; 86 size = 4; 87 width = 12; 88 while ((c = *fp++) != 0) { 89 if (db_print_position() == 0) { 90 /* Always print the address. */ 91 db_printsym(addr, DB_STGY_ANY, db_printf); 92 db_printf(":\t"); 93 db_prev = addr; 94 } 95 switch (c) { 96 case 'b': /* byte */ 97 size = 1; 98 width = 4; 99 break; 100 case 'h': /* half-word */ 101 size = 2; 102 width = 8; 103 break; 104 case 'l': /* long-word */ 105 size = 4; 106 width = 12; 107 break; 108 case 'L': /* implementation maximum */ 109 size = sizeof value; 110 width = 12 * (sizeof value / 4); 111 break; 112 case 'a': /* address */ 113 db_printf("= 0x%lx\n", addr); 114 break; 115 case 'r': /* signed, current radix */ 116 value = db_get_value(addr, size, TRUE); 117 addr += size; 118 db_printf("%-*lr", width, value); 119 break; 120 case 'x': /* unsigned hex */ 121 value = db_get_value(addr, size, FALSE); 122 addr += size; 123 db_printf("%-*lx", width, value); 124 break; 125 case 'z': /* signed hex */ 126 value = db_get_value(addr, size, TRUE); 127 addr += size; 128 db_printf("%-*lz", width, value); 129 break; 130 case 'd': /* signed decimal */ 131 value = db_get_value(addr, size, TRUE); 132 addr += size; 133 db_printf("%-*ld", width, value); 134 break; 135 case 'u': /* unsigned decimal */ 136 value = db_get_value(addr, size, FALSE); 137 addr += size; 138 db_printf("%-*lu", width, value); 139 break; 140 case 'o': /* unsigned octal */ 141 value = db_get_value(addr, size, FALSE); 142 addr += size; 143 db_printf("%-*lo", width, value); 144 break; 145 case 'c': /* character */ 146 value = db_get_value(addr, 1, FALSE); 147 addr += 1; 148 if (value >= ' ' && value <= '~') 149 db_printf("%c", (char)value); 150 else 151 db_printf("\\%03lo", value); 152 break; 153 case 's': /* null-terminated string */ 154 for (;;) { 155 value = db_get_value(addr, 1, FALSE); 156 addr += 1; 157 if (value == 0) 158 break; 159 if (value >= ' ' && value <= '~') 160 db_printf("%c", (char)value); 161 else 162 db_printf("\\%03lo", value); 163 } 164 break; 165 case 'i': /* instruction */ 166 addr = db_disasm(addr, FALSE); 167 break; 168 case 'I': /* instruction, alternate form */ 169 addr = db_disasm(addr, TRUE); 170 break; 171 default: 172 break; 173 } 174 if (db_print_position() != 0) 175 db_end_line(); 176 } 177 } 178 db_next = addr; 179 } 180 181 /* 182 * Print value. 183 */ 184 char db_print_format = 'x'; 185 186 /*ARGSUSED*/ 187 void 188 db_print_cmd(addr, have_addr, count, modif) 189 db_expr_t addr; 190 int have_addr; 191 db_expr_t count; 192 char * modif; 193 { 194 db_expr_t value; 195 196 if (modif[0] != '\0') 197 db_print_format = modif[0]; 198 199 switch (db_print_format) { 200 case 'a': 201 db_printsym((db_addr_t)addr, DB_STGY_ANY, db_printf); 202 break; 203 case 'r': 204 db_printf("%11lr", addr); 205 break; 206 case 'x': 207 db_printf("%8lx", addr); 208 break; 209 case 'z': 210 db_printf("%8lz", addr); 211 break; 212 case 'd': 213 db_printf("%11ld", addr); 214 break; 215 case 'u': 216 db_printf("%11lu", addr); 217 break; 218 case 'o': 219 db_printf("%16lo", addr); 220 break; 221 case 'c': 222 value = addr & 0xFF; 223 if (value >= ' ' && value <= '~') 224 db_printf("%c", (char)value); 225 else 226 db_printf("\\%03lo", value); 227 break; 228 } 229 db_printf("\n"); 230 } 231 232 void 233 db_print_loc_and_inst(loc) 234 db_addr_t loc; 235 { 236 db_printsym(loc, DB_STGY_PROC, db_printf); 237 db_printf(":\t"); 238 (void) db_disasm(loc, FALSE); 239 } 240 241 void 242 db_strcpy(dst, src) 243 char *dst; 244 char *src; 245 { 246 while ((*dst++ = *src++) != '\0') 247 ; 248 } 249 250 /* 251 * Search for a value in memory. 252 * Syntax: search [/bhl] addr value [mask] [,count] 253 */ 254 /*ARGSUSED*/ 255 void 256 db_search_cmd(daddr, have_addr, dcount, modif) 257 db_expr_t daddr; 258 int have_addr; 259 db_expr_t dcount; 260 char * modif; 261 { 262 int t; 263 db_addr_t addr; 264 int size; 265 db_expr_t value; 266 db_expr_t mask; 267 db_expr_t count; 268 269 t = db_read_token(); 270 if (t == tSLASH) { 271 t = db_read_token(); 272 if (t != tIDENT) { 273 bad_modifier: 274 db_printf("Bad modifier\n"); 275 db_flush_lex(); 276 return; 277 } 278 279 if (!strcmp(db_tok_string, "b")) 280 size = 1; 281 else if (!strcmp(db_tok_string, "h")) 282 size = 2; 283 else if (!strcmp(db_tok_string, "l")) 284 size = 4; 285 else 286 goto bad_modifier; 287 } else { 288 db_unread_token(t); 289 size = 4; 290 } 291 292 if (!db_expression(&value)) { 293 db_printf("Address missing\n"); 294 db_flush_lex(); 295 return; 296 } 297 addr = (db_addr_t) value; 298 299 if (!db_expression(&value)) { 300 db_printf("Value missing\n"); 301 db_flush_lex(); 302 return; 303 } 304 305 if (!db_expression(&mask)) 306 mask = (int) ~0; 307 308 t = db_read_token(); 309 if (t == tCOMMA) { 310 if (!db_expression(&count)) { 311 db_printf("Count missing\n"); 312 db_flush_lex(); 313 return; 314 } 315 } else { 316 db_unread_token(t); 317 count = -1; /* effectively forever */ 318 } 319 db_skip_to_eol(); 320 321 db_search(addr, size, value, mask, count); 322 } 323 324 void 325 db_search(addr, size, value, mask, count) 326 db_addr_t addr; 327 int size; 328 db_expr_t value; 329 db_expr_t mask; 330 unsigned int count; 331 { 332 while (count-- != 0) { 333 db_prev = addr; 334 if ((db_get_value(addr, size, FALSE) & mask) == value) 335 break; 336 addr += size; 337 } 338 db_next = addr; 339 } 340
Indexes created Wed Sep 24 14:09:57 GMT 2025