db_examine.c revision 92756
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 * $FreeBSD: head/sys/ddb/db_examine.c 92756 2002-03-20 05:14:42Z alfred $ 27 */ 28 29/* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.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 45static char 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 boolean_t 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 'g': 102 size = 8; 103 width = 32; 104 break; 105 case 'a': /* address */ 106 /* always forces a new line */ 107 if (db_print_position() != 0) 108 db_printf("\n"); 109 db_prev = addr; 110 db_printsym(addr, DB_STGY_ANY); 111 db_printf(":\t"); 112 break; 113 default: 114 if (db_print_position() == 0) { 115 /* Print the address. */ 116 db_printsym(addr, DB_STGY_ANY); 117 db_printf(":\t"); 118 db_prev = addr; 119 } 120 121 switch (c) { 122 case 'r': /* signed, current radix */ 123 value = db_get_value(addr, size, TRUE); 124 addr += size; 125 db_printf("%+-*lr", width, (long)value); 126 break; 127 case 'x': /* unsigned hex */ 128 value = db_get_value(addr, size, FALSE); 129 addr += size; 130 db_printf("%-*lx", width, (long)value); 131 break; 132 case 'z': /* signed hex */ 133 value = db_get_value(addr, size, TRUE); 134 addr += size; 135 db_printf("%-*lz", width, (long)value); 136 break; 137 case 'd': /* signed decimal */ 138 value = db_get_value(addr, size, TRUE); 139 addr += size; 140 db_printf("%-*ld", width, (long)value); 141 break; 142 case 'u': /* unsigned decimal */ 143 value = db_get_value(addr, size, FALSE); 144 addr += size; 145 db_printf("%-*lu", width, (long)value); 146 break; 147 case 'o': /* unsigned octal */ 148 value = db_get_value(addr, size, FALSE); 149 addr += size; 150 db_printf("%-*lo", width, (long)value); 151 break; 152 case 'c': /* character */ 153 value = db_get_value(addr, 1, FALSE); 154 addr += 1; 155 if (value >= ' ' && value <= '~') 156 db_printf("%c", (int)value); 157 else 158 db_printf("\\%03o", (int)value); 159 break; 160 case 's': /* null-terminated string */ 161 for (;;) { 162 value = db_get_value(addr, 1, FALSE); 163 addr += 1; 164 if (value == 0) 165 break; 166 if (value >= ' ' && value <= '~') 167 db_printf("%c", (int)value); 168 else 169 db_printf("\\%03o", (int)value); 170 } 171 break; 172 case 'i': /* instruction */ 173 addr = db_disasm(addr, FALSE); 174 break; 175 case 'I': /* instruction, alternate form */ 176 addr = db_disasm(addr, TRUE); 177 break; 178 default: 179 break; 180 } 181 if (db_print_position() != 0) 182 db_end_line(); 183 break; 184 } 185 } 186 } 187 db_next = addr; 188} 189 190/* 191 * Print value. 192 */ 193static char db_print_format = 'x'; 194 195/*ARGSUSED*/ 196void 197db_print_cmd(addr, have_addr, count, modif) 198 db_expr_t addr; 199 boolean_t have_addr; 200 db_expr_t count; 201 char * modif; 202{ 203 db_expr_t value; 204 205 if (modif[0] != '\0') 206 db_print_format = modif[0]; 207 208 switch (db_print_format) { 209 case 'a': 210 db_printsym((db_addr_t)addr, DB_STGY_ANY); 211 break; 212 case 'r': 213 db_printf("%+11lr", (long)addr); 214 break; 215 case 'x': 216 db_printf("%8lx", (unsigned long)addr); 217 break; 218 case 'z': 219 db_printf("%8lz", (long)addr); 220 break; 221 case 'd': 222 db_printf("%11ld", (long)addr); 223 break; 224 case 'u': 225 db_printf("%11lu", (unsigned long)addr); 226 break; 227 case 'o': 228 db_printf("%16lo", (unsigned long)addr); 229 break; 230 case 'c': 231 value = addr & 0xFF; 232 if (value >= ' ' && value <= '~') 233 db_printf("%c", (int)value); 234 else 235 db_printf("\\%03o", (int)value); 236 break; 237 } 238 db_printf("\n"); 239} 240 241void 242db_print_loc_and_inst(loc) 243 db_addr_t loc; 244{ 245 db_printsym(loc, DB_STGY_PROC); 246 db_printf(":\t"); 247 (void) db_disasm(loc, TRUE); 248} 249 250/* 251 * Search for a value in memory. 252 * Syntax: search [/bhl] addr value [mask] [,count] 253 */ 254void 255db_search_cmd(dummy1, dummy2, dummy3, dummy4) 256 db_expr_t dummy1; 257 boolean_t dummy2; 258 db_expr_t dummy3; 259 char * dummy4; 260{ 261 int t; 262 db_addr_t addr; 263 int size; 264 db_expr_t value; 265 db_expr_t mask; 266 db_expr_t count; 267 268 t = db_read_token(); 269 if (t == tSLASH) { 270 t = db_read_token(); 271 if (t != tIDENT) { 272 bad_modifier: 273 db_printf("Bad modifier\n"); 274 db_flush_lex(); 275 return; 276 } 277 278 if (!strcmp(db_tok_string, "b")) 279 size = 1; 280 else if (!strcmp(db_tok_string, "h")) 281 size = 2; 282 else if (!strcmp(db_tok_string, "l")) 283 size = 4; 284 else 285 goto bad_modifier; 286 } else { 287 db_unread_token(t); 288 size = 4; 289 } 290 291 if (!db_expression((db_expr_t *)&addr)) { 292 db_printf("Address missing\n"); 293 db_flush_lex(); 294 return; 295 } 296 297 if (!db_expression(&value)) { 298 db_printf("Value missing\n"); 299 db_flush_lex(); 300 return; 301 } 302 303 if (!db_expression(&mask)) 304 mask = 0xffffffffUL; 305 306 t = db_read_token(); 307 if (t == tCOMMA) { 308 if (!db_expression(&count)) { 309 db_printf("Count missing\n"); 310 db_flush_lex(); 311 return; 312 } 313 } else { 314 db_unread_token(t); 315 count = -1; /* effectively forever */ 316 } 317 db_skip_to_eol(); 318 319 db_search(addr, size, value, mask, count); 320} 321 322static void 323db_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