db_examine.c revision 8876
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 1.7 1995/05/22 13:07:11 davidg 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#include <sys/proc.h> 36 37#include <ddb/ddb.h> 38 39#include <ddb/db_lex.h> 40#include <ddb/db_output.h> 41#include <ddb/db_command.h> 42#include <ddb/db_sym.h> 43#include <ddb/db_access.h> 44 45char db_examine_format[TOK_STRING_SIZE] = "x"; 46 47static void db_examine(db_addr_t, char *, int); 48static void db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int); 49 50/* 51 * Examine (print) data. 52 */ 53/*ARGSUSED*/ 54void 55db_examine_cmd(addr, have_addr, count, modif) 56 db_expr_t addr; 57 int have_addr; 58 db_expr_t count; 59 char * modif; 60{ 61 if (modif[0] != '\0') 62 db_strcpy(db_examine_format, modif); 63 64 if (count == -1) 65 count = 1; 66 67 db_examine((db_addr_t) addr, db_examine_format, count); 68} 69 70static void 71db_examine(addr, fmt, count) 72 register 73 db_addr_t addr; 74 char * fmt; /* format string */ 75 int count; /* repeat count */ 76{ 77 int c; 78 db_expr_t value; 79 int size; 80 int width; 81 char * fp; 82 83 while (--count >= 0) { 84 fp = fmt; 85 size = 4; 86 width = 16; 87 while ((c = *fp++) != 0) { 88 switch (c) { 89 case 'b': 90 size = 1; 91 width = 4; 92 break; 93 case 'h': 94 size = 2; 95 width = 8; 96 break; 97 case 'l': 98 size = 4; 99 width = 16; 100 break; 101 case 'a': /* address */ 102 /* always forces a new line */ 103 if (db_print_position() != 0) 104 db_printf("\n"); 105 db_prev = addr; 106 db_printsym(addr, DB_STGY_ANY); 107 db_printf(":\t"); 108 break; 109 default: 110 if (db_print_position() == 0) { 111 /* Print the address. */ 112 db_printsym(addr, DB_STGY_ANY); 113 db_printf(":\t"); 114 db_prev = addr; 115 } 116 117 switch (c) { 118 case 'r': /* signed, current radix */ 119 value = db_get_value(addr, size, TRUE); 120 addr += size; 121 db_printf("%-*r", width, value); 122 break; 123 case 'x': /* unsigned hex */ 124 value = db_get_value(addr, size, FALSE); 125 addr += size; 126 db_printf("%-*x", width, value); 127 break; 128 case 'z': /* signed hex */ 129 value = db_get_value(addr, size, TRUE); 130 addr += size; 131 db_printf("%-*z", width, value); 132 break; 133 case 'd': /* signed decimal */ 134 value = db_get_value(addr, size, TRUE); 135 addr += size; 136 db_printf("%-*d", width, value); 137 break; 138 case 'u': /* unsigned decimal */ 139 value = db_get_value(addr, size, FALSE); 140 addr += size; 141 db_printf("%-*u", width, value); 142 break; 143 case 'o': /* unsigned octal */ 144 value = db_get_value(addr, size, FALSE); 145 addr += size; 146 db_printf("%-*o", 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", value); 153 else 154 db_printf("\\%03o", 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", value); 164 else 165 db_printf("\\%03o", 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 break; 180 } 181 } 182 } 183 db_next = addr; 184} 185 186/* 187 * Print value. 188 */ 189char db_print_format = 'x'; 190 191/*ARGSUSED*/ 192void 193db_print_cmd(addr, have_addr, count, modif) 194 db_expr_t addr; 195 int have_addr; 196 db_expr_t count; 197 char * modif; 198{ 199 db_expr_t value; 200 201 if (modif[0] != '\0') 202 db_print_format = modif[0]; 203 204 switch (db_print_format) { 205 case 'a': 206 db_printsym((db_addr_t)addr, DB_STGY_ANY); 207 break; 208 case 'r': 209 db_printf("%11r", addr); 210 break; 211 case 'x': 212 db_printf("%8x", addr); 213 break; 214 case 'z': 215 db_printf("%8z", addr); 216 break; 217 case 'd': 218 db_printf("%11d", addr); 219 break; 220 case 'u': 221 db_printf("%11u", addr); 222 break; 223 case 'o': 224 db_printf("%16o", addr); 225 break; 226 case 'c': 227 value = addr & 0xFF; 228 if (value >= ' ' && value <= '~') 229 db_printf("%c", value); 230 else 231 db_printf("\\%03o", value); 232 break; 233 } 234 db_printf("\n"); 235} 236 237void 238db_print_loc_and_inst(loc) 239 db_addr_t loc; 240{ 241 db_printsym(loc, DB_STGY_PROC); 242 db_printf(":\t"); 243 (void) db_disasm(loc, TRUE); 244} 245 246/* 247 * Search for a value in memory. 248 * Syntax: search [/bhl] addr value [mask] [,count] 249 */ 250void 251db_search_cmd(db_expr_t dummy1, int dummy2, db_expr_t dummy3, char *dummy4) 252{ 253 int t; 254 db_addr_t addr; 255 int size; 256 db_expr_t value; 257 db_expr_t mask; 258 unsigned int count; 259 260 t = db_read_token(); 261 if (t == tSLASH) { 262 t = db_read_token(); 263 if (t != tIDENT) { 264 bad_modifier: 265 db_printf("Bad modifier\n"); 266 db_flush_lex(); 267 return; 268 } 269 270 if (!strcmp(db_tok_string, "b")) 271 size = 1; 272 else if (!strcmp(db_tok_string, "h")) 273 size = 2; 274 else if (!strcmp(db_tok_string, "l")) 275 size = 4; 276 else 277 goto bad_modifier; 278 } else { 279 db_unread_token(t); 280 size = 4; 281 } 282 283 if (!db_expression((db_expr_t *)&addr)) { 284 db_printf("Address missing\n"); 285 db_flush_lex(); 286 return; 287 } 288 289 if (!db_expression(&value)) { 290 db_printf("Value missing\n"); 291 db_flush_lex(); 292 return; 293 } 294 295 if (!db_expression(&mask)) 296 mask = 0xffffffffUL; 297 298 t = db_read_token(); 299 if (t == tCOMMA) { 300 if (!db_expression(&count)) { 301 db_printf("Count missing\n"); 302 db_flush_lex(); 303 return; 304 } 305 } else { 306 db_unread_token(t); 307 count = -1; /* effectively forever */ 308 } 309 db_skip_to_eol(); 310 311 db_search(addr, size, value, mask, count); 312} 313 314static void 315db_search(addr, size, value, mask, count) 316 register 317 db_addr_t addr; 318 int size; 319 db_expr_t value; 320 db_expr_t mask; 321 unsigned int count; 322{ 323 while (count-- != 0) { 324 db_prev = addr; 325 if ((db_get_value(addr, size, FALSE) & mask) == value) 326 break; 327 addr += size; 328 } 329 db_next = addr; 330} 331