db_examine.c revision 1.3
1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 * 26 * Author: David B. Golub, Carnegie Mellon University 27 * Date: 7/90 28 * $Id: db_examine.c,v 1.3 1993/12/18 04:46:31 mycroft Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/proc.h> 33 34 #include <machine/db_machdep.h> /* type definitions */ 35 36 #include <ddb/db_lex.h> 37 #include <ddb/db_output.h> 38 #include <ddb/db_command.h> 39 #include <ddb/db_sym.h> 40 41 char db_examine_format[TOK_STRING_SIZE] = "x"; 42 43 extern db_addr_t db_disasm(/* db_addr_t, boolean_t */); 44 /* instruction disassembler */ 45 46 /* 47 * Examine (print) data. 48 */ 49 /*ARGSUSED*/ 50 void 51 db_examine_cmd(addr, have_addr, count, modif) 52 db_expr_t addr; 53 int have_addr; 54 db_expr_t count; 55 char * modif; 56 { 57 if (modif[0] != '\0') 58 db_strcpy(db_examine_format, modif); 59 60 if (count == -1) 61 count = 1; 62 63 db_examine((db_addr_t) addr, db_examine_format, count); 64 } 65 66 db_examine(addr, fmt, count) 67 register 68 db_addr_t addr; 69 char * fmt; /* format string */ 70 int count; /* repeat count */ 71 { 72 int c; 73 db_expr_t value; 74 int size; 75 int width; 76 char * fp; 77 78 while (--count >= 0) { 79 fp = fmt; 80 size = 4; 81 width = 16; 82 while ((c = *fp++) != 0) { 83 switch (c) { 84 case 'b': 85 size = 1; 86 width = 4; 87 break; 88 case 'h': 89 size = 2; 90 width = 8; 91 break; 92 case 'l': 93 size = 4; 94 width = 16; 95 break; 96 case 'a': /* address */ 97 /* always forces a new line */ 98 if (db_print_position() != 0) 99 db_printf("\n"); 100 db_prev = addr; 101 db_printsym(addr, DB_STGY_ANY); 102 db_printf(":\t"); 103 break; 104 default: 105 if (db_print_position() == 0) { 106 /* If we hit a new symbol, print it */ 107 char * name; 108 db_expr_t off; 109 110 db_find_sym_and_offset(addr, &name, &off); 111 if (off == 0) 112 db_printf("%s:\t", name); 113 else 114 db_printf("\t\t"); 115 116 db_prev = addr; 117 } 118 119 switch (c) { 120 case 'r': /* signed, current radix */ 121 value = db_get_value(addr, size, TRUE); 122 addr += size; 123 db_printf("%-*r", width, value); 124 break; 125 case 'x': /* unsigned hex */ 126 value = db_get_value(addr, size, FALSE); 127 addr += size; 128 db_printf("%-*x", width, value); 129 break; 130 case 'z': /* signed hex */ 131 value = db_get_value(addr, size, TRUE); 132 addr += size; 133 db_printf("%-*z", width, value); 134 break; 135 case 'd': /* signed decimal */ 136 value = db_get_value(addr, size, TRUE); 137 addr += size; 138 db_printf("%-*d", width, value); 139 break; 140 case 'u': /* unsigned decimal */ 141 value = db_get_value(addr, size, FALSE); 142 addr += size; 143 db_printf("%-*u", width, value); 144 break; 145 case 'o': /* unsigned octal */ 146 value = db_get_value(addr, size, FALSE); 147 addr += size; 148 db_printf("%-*o", width, value); 149 break; 150 case 'c': /* character */ 151 value = db_get_value(addr, 1, FALSE); 152 addr += 1; 153 if (value >= ' ' && value <= '~') 154 db_printf("%c", value); 155 else 156 db_printf("\\%03o", value); 157 break; 158 case 's': /* null-terminated string */ 159 for (;;) { 160 value = db_get_value(addr, 1, FALSE); 161 addr += 1; 162 if (value == 0) 163 break; 164 if (value >= ' ' && value <= '~') 165 db_printf("%c", value); 166 else 167 db_printf("\\%03o", value); 168 } 169 break; 170 case 'i': /* instruction */ 171 addr = db_disasm(addr, FALSE); 172 break; 173 case 'I': /* instruction, alternate form */ 174 addr = db_disasm(addr, TRUE); 175 break; 176 default: 177 break; 178 } 179 if (db_print_position() != 0) 180 db_end_line(); 181 break; 182 } 183 } 184 } 185 db_next = addr; 186 } 187 188 /* 189 * Print value. 190 */ 191 char db_print_format = 'x'; 192 193 /*ARGSUSED*/ 194 void 195 db_print_cmd(addr, have_addr, count, modif) 196 db_expr_t addr; 197 int have_addr; 198 db_expr_t count; 199 char * modif; 200 { 201 db_expr_t value; 202 203 if (modif[0] != '\0') 204 db_print_format = modif[0]; 205 206 switch (db_print_format) { 207 case 'a': 208 db_printsym((db_addr_t)addr, DB_STGY_ANY); 209 break; 210 case 'r': 211 db_printf("%11r", addr); 212 break; 213 case 'x': 214 db_printf("%8x", addr); 215 break; 216 case 'z': 217 db_printf("%8z", addr); 218 break; 219 case 'd': 220 db_printf("%11d", addr); 221 break; 222 case 'u': 223 db_printf("%11u", addr); 224 break; 225 case 'o': 226 db_printf("%16o", addr); 227 break; 228 case 'c': 229 value = addr & 0xFF; 230 if (value >= ' ' && value <= '~') 231 db_printf("%c", value); 232 else 233 db_printf("\\%03o", value); 234 break; 235 } 236 db_printf("\n"); 237 } 238 239 db_print_loc_and_inst(loc) 240 db_addr_t loc; 241 { 242 db_printsym(loc, DB_STGY_PROC); 243 db_printf(":\t"); 244 (void) db_disasm(loc, TRUE); 245 } 246 247 db_strcpy(dst, src) 248 register char *dst; 249 register char *src; 250 { 251 while (*dst++ = *src++) 252 ; 253 } 254 255 /* 256 * Search for a value in memory. 257 * Syntax: search [/bhl] addr value [mask] [,count] 258 */ 259 void 260 db_search_cmd() 261 { 262 int t; 263 db_addr_t addr; 264 int size; 265 db_expr_t value; 266 db_expr_t mask; 267 unsigned int 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(&addr)) { 293 db_printf("Address missing\n"); 294 db_flush_lex(); 295 return; 296 } 297 298 if (!db_expression(&value)) { 299 db_printf("Value missing\n"); 300 db_flush_lex(); 301 return; 302 } 303 304 if (!db_expression(&mask)) 305 mask = 0xffffffff; 306 307 t = db_read_token(); 308 if (t == tCOMMA) { 309 if (!db_expression(&count)) { 310 db_printf("Count missing\n"); 311 db_flush_lex(); 312 return; 313 } 314 } else { 315 db_unread_token(t); 316 count = -1; /* effectively forever */ 317 } 318 db_skip_to_eol(); 319 320 db_search(addr, size, value, mask, count); 321 } 322 323 db_search(addr, size, value, mask, count) 324 register 325 db_addr_t addr; 326 int size; 327 db_expr_t value; 328 db_expr_t mask; 329 unsigned int count; 330 { 331 while (count-- != 0) { 332 db_prev = addr; 333 if ((db_get_value(addr, size, FALSE) & mask) == value) 334 break; 335 addr += size; 336 } 337 db_next = addr; 338 } 339
Indexes created Tue Sep 23 21:09:50 GMT 2025