db_examine.c revision 13446
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@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 * $Id: db_examine.c,v 1.12 1995/12/10 19:07:55 bde Exp $ 27 */ 28 29/* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 33#include <sys/param.h> 34#include <sys/systm.h> 35 36#include <ddb/ddb.h> 37 38#include <ddb/db_lex.h> 39#include <ddb/db_output.h> 40#include <ddb/db_command.h> 41#include <ddb/db_sym.h> 42#include <ddb/db_access.h> 43 44static char db_examine_format[TOK_STRING_SIZE] = "x"; 45 46static void db_examine(db_addr_t, char *, int); 47static void db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int); 48 49/* 50 * Examine (print) data. 51 */ 52/*ARGSUSED*/ 53void 54db_examine_cmd(addr, have_addr, count, modif) 55 db_expr_t addr; 56 boolean_t have_addr; 57 db_expr_t count; 58 char * modif; 59{ 60 if (modif[0] != '\0') 61 db_strcpy(db_examine_format, modif); 62 63 if (count == -1) 64 count = 1; 65 66 db_examine((db_addr_t) addr, db_examine_format, count); 67} 68 69static void 70db_examine(addr, fmt, count) 71 register 72 db_addr_t addr; 73 char * fmt; /* format string */ 74 int count; /* repeat count */ 75{ 76 int c; 77 db_expr_t value; 78 int size; 79 int width; 80 char * fp; 81 82 while (--count >= 0) { 83 fp = fmt; 84 size = 4; 85 width = 16; 86 while ((c = *fp++) != 0) { 87 switch (c) { 88 case 'b': 89 size = 1; 90 width = 4; 91 break; 92 case 'h': 93 size = 2; 94 width = 8; 95 break; 96 case 'l': 97 size = 4; 98 width = 16; 99 break; 100 case 'a': /* address */ 101 /* always forces a new line */ 102 if (db_print_position() != 0) 103 db_printf("\n"); 104 db_prev = addr; 105 db_printsym(addr, DB_STGY_ANY); 106 db_printf(":\t"); 107 break; 108 default: 109 if (db_print_position() == 0) { 110 /* Print the address. */ 111 db_printsym(addr, DB_STGY_ANY); 112 db_printf(":\t"); 113 db_prev = addr; 114 } 115 116 switch (c) { 117 case 'r': /* signed, current radix */ 118 value = db_get_value(addr, size, TRUE); 119 addr += size; 120 db_printf("%-*r", width, value); 121 break; 122 case 'x': /* unsigned hex */ 123 value = db_get_value(addr, size, FALSE); 124 addr += size; 125 db_printf("%-*x", width, value); 126 break; 127 case 'z': /* signed hex */ 128 value = db_get_value(addr, size, TRUE); 129 addr += size; 130 db_printf("%+-*x", width, value); 131 break; 132 case 'd': /* signed decimal */ 133 value = db_get_value(addr, size, TRUE); 134 addr += size; 135 db_printf("%-*d", width, value); 136 break; 137 case 'u': /* unsigned decimal */ 138 value = db_get_value(addr, size, FALSE); 139 addr += size; 140 db_printf("%-*u", width, value); 141 break; 142 case 'o': /* unsigned octal */ 143 value = db_get_value(addr, size, FALSE); 144 addr += size; 145 db_printf("%-*o", width, value); 146 break; 147 case 'c': /* character */ 148 value = db_get_value(addr, 1, FALSE); 149 addr += 1; 150 if (value >= ' ' && value <= '~') 151 db_printf("%c", value); 152 else 153 db_printf("\\%03o", value); 154 break; 155 case 's': /* null-terminated string */ 156 for (;;) { 157 value = db_get_value(addr, 1, FALSE); 158 addr += 1; 159 if (value == 0) 160 break; 161 if (value >= ' ' && value <= '~') 162 db_printf("%c", value); 163 else 164 db_printf("\\%03o", value); 165 } 166 break; 167 case 'i': /* instruction */ 168 addr = db_disasm(addr, FALSE); 169 break; 170 case 'I': /* instruction, alternate form */ 171 addr = db_disasm(addr, TRUE); 172 break; 173 default: 174 break; 175 } 176 if (db_print_position() != 0) 177 db_end_line(); 178 break; 179 } 180 } 181 } 182 db_next = addr; 183} 184 185/* 186 * Print value. 187 */ 188static char db_print_format = 'x'; 189 190/*ARGSUSED*/ 191void 192db_print_cmd(addr, have_addr, count, modif) 193 db_expr_t addr; 194 boolean_t have_addr; 195 db_expr_t count; 196 char * modif; 197{ 198 db_expr_t value; 199 200 if (modif[0] != '\0') 201 db_print_format = modif[0]; 202 203 switch (db_print_format) { 204 case 'a': 205 db_printsym((db_addr_t)addr, DB_STGY_ANY); 206 break; 207 case 'r': 208 db_printf("%+11n", addr); 209 break; 210 case 'x': 211 db_printf("%8x", addr); 212 break; 213 case 'z': 214 db_printf("%+8x", addr); 215 break; 216 case 'd': 217 db_printf("%11d", addr); 218 break; 219 case 'u': 220 db_printf("%11u", addr); 221 break; 222 case 'o': 223 db_printf("%16o", addr); 224 break; 225 case 'c': 226 value = addr & 0xFF; 227 if (value >= ' ' && value <= '~') 228 db_printf("%c", value); 229 else 230 db_printf("\\%03o", value); 231 break; 232 } 233 db_printf("\n"); 234} 235 236void 237db_print_loc_and_inst(loc) 238 db_addr_t loc; 239{ 240 db_printsym(loc, DB_STGY_PROC); 241 db_printf(":\t"); 242 (void) db_disasm(loc, TRUE); 243} 244 245/* 246 * Search for a value in memory. 247 * Syntax: search [/bhl] addr value [mask] [,count] 248 */ 249void 250db_search_cmd(dummy1, dummy2, dummy3, dummy4) 251 db_expr_t dummy1; 252 boolean_t dummy2; 253 db_expr_t dummy3; 254 char * dummy4; 255{ 256 int t; 257 db_addr_t addr; 258 int size; 259 db_expr_t value; 260 db_expr_t mask; 261 unsigned int count; 262 263 t = db_read_token(); 264 if (t == tSLASH) { 265 t = db_read_token(); 266 if (t != tIDENT) { 267 bad_modifier: 268 db_printf("Bad modifier\n"); 269 db_flush_lex(); 270 return; 271 } 272 273 if (!strcmp(db_tok_string, "b")) 274 size = 1; 275 else if (!strcmp(db_tok_string, "h")) 276 size = 2; 277 else if (!strcmp(db_tok_string, "l")) 278 size = 4; 279 else 280 goto bad_modifier; 281 } else { 282 db_unread_token(t); 283 size = 4; 284 } 285 286 if (!db_expression((db_expr_t *)&addr)) { 287 db_printf("Address missing\n"); 288 db_flush_lex(); 289 return; 290 } 291 292 if (!db_expression(&value)) { 293 db_printf("Value missing\n"); 294 db_flush_lex(); 295 return; 296 } 297 298 if (!db_expression(&mask)) 299 mask = 0xffffffffUL; 300 301 t = db_read_token(); 302 if (t == tCOMMA) { 303 if (!db_expression(&count)) { 304 db_printf("Count missing\n"); 305 db_flush_lex(); 306 return; 307 } 308 } else { 309 db_unread_token(t); 310 count = -1; /* effectively forever */ 311 } 312 db_skip_to_eol(); 313 314 db_search(addr, size, value, mask, count); 315} 316 317static void 318db_search(addr, size, value, mask, count) 319 register 320 db_addr_t addr; 321 int size; 322 db_expr_t value; 323 db_expr_t mask; 324 unsigned int count; 325{ 326 while (count-- != 0) { 327 db_prev = addr; 328 if ((db_get_value(addr, size, FALSE) & mask) == value) 329 break; 330 addr += size; 331 } 332 db_next = addr; 333} 334