db_examine.c revision 1.13
1 /* $NetBSD: db_examine.c,v 1.13 1997/02/03 23:43:36 mycroft 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 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 register 75 db_addr_t addr; 76 char * fmt; /* format string */ 77 int count; /* repeat count */ 78 { 79 int c; 80 db_expr_t value; 81 int size; 82 int width; 83 char * fp; 84 85 while (--count >= 0) { 86 fp = fmt; 87 size = 4; 88 width = 12; 89 while ((c = *fp++) != 0) { 90 if (db_print_position() == 0) { 91 /* Always print the address. */ 92 db_printsym(addr, DB_STGY_ANY); 93 db_printf(":\t"); 94 db_prev = addr; 95 } 96 switch (c) { 97 case 'b': /* byte */ 98 size = 1; 99 width = 4; 100 break; 101 case 'h': /* half-word */ 102 size = 2; 103 width = 8; 104 break; 105 case 'l': /* long-word */ 106 size = 4; 107 width = 12; 108 break; 109 case 'a': /* address */ 110 db_printf("= 0x%lx\n", addr); 111 break; 112 case 'r': /* signed, current radix */ 113 value = db_get_value(addr, size, TRUE); 114 addr += size; 115 db_printf("%-*lr", width, value); 116 break; 117 case 'x': /* unsigned hex */ 118 value = db_get_value(addr, size, FALSE); 119 addr += size; 120 db_printf("%-*lx", width, value); 121 break; 122 case 'z': /* signed hex */ 123 value = db_get_value(addr, size, TRUE); 124 addr += size; 125 db_printf("%-*lz", width, value); 126 break; 127 case 'd': /* signed decimal */ 128 value = db_get_value(addr, size, TRUE); 129 addr += size; 130 db_printf("%-*ld", width, value); 131 break; 132 case 'u': /* unsigned decimal */ 133 value = db_get_value(addr, size, FALSE); 134 addr += size; 135 db_printf("%-*lu", width, value); 136 break; 137 case 'o': /* unsigned octal */ 138 value = db_get_value(addr, size, FALSE); 139 addr += size; 140 db_printf("%-*lo", width, value); 141 break; 142 case 'c': /* character */ 143 value = db_get_value(addr, 1, FALSE); 144 addr += 1; 145 if (value >= ' ' && value <= '~') 146 db_printf("%c", (char)value); 147 else 148 db_printf("\\%03lo", value); 149 break; 150 case 's': /* null-terminated string */ 151 for (;;) { 152 value = db_get_value(addr, 1, FALSE); 153 addr += 1; 154 if (value == 0) 155 break; 156 if (value >= ' ' && value <= '~') 157 db_printf("%c", (char)value); 158 else 159 db_printf("\\%03lo", value); 160 } 161 break; 162 case 'i': /* instruction */ 163 addr = db_disasm(addr, FALSE); 164 break; 165 case 'I': /* instruction, alternate form */ 166 addr = db_disasm(addr, TRUE); 167 break; 168 default: 169 break; 170 } 171 if (db_print_position() != 0) 172 db_end_line(); 173 } 174 } 175 db_next = addr; 176 } 177 178 /* 179 * Print value. 180 */ 181 char db_print_format = 'x'; 182 183 /*ARGSUSED*/ 184 void 185 db_print_cmd(addr, have_addr, count, modif) 186 db_expr_t addr; 187 int have_addr; 188 db_expr_t count; 189 char * modif; 190 { 191 db_expr_t value; 192 193 if (modif[0] != '\0') 194 db_print_format = modif[0]; 195 196 switch (db_print_format) { 197 case 'a': 198 db_printsym((db_addr_t)addr, DB_STGY_ANY); 199 break; 200 case 'r': 201 db_printf("%11lr", addr); 202 break; 203 case 'x': 204 db_printf("%8lx", addr); 205 break; 206 case 'z': 207 db_printf("%8lz", addr); 208 break; 209 case 'd': 210 db_printf("%11ld", addr); 211 break; 212 case 'u': 213 db_printf("%11lu", addr); 214 break; 215 case 'o': 216 db_printf("%16lo", addr); 217 break; 218 case 'c': 219 value = addr & 0xFF; 220 if (value >= ' ' && value <= '~') 221 db_printf("%c", (char)value); 222 else 223 db_printf("\\%03lo", value); 224 break; 225 } 226 db_printf("\n"); 227 } 228 229 void 230 db_print_loc_and_inst(loc) 231 db_addr_t loc; 232 { 233 db_printsym(loc, DB_STGY_PROC); 234 db_printf(":\t"); 235 (void) db_disasm(loc, FALSE); 236 } 237 238 void 239 db_strcpy(dst, src) 240 register char *dst; 241 register char *src; 242 { 243 while ((*dst++ = *src++) != '\0') 244 ; 245 } 246 247 /* 248 * Search for a value in memory. 249 * Syntax: search [/bhl] addr value [mask] [,count] 250 */ 251 /*ARGSUSED*/ 252 void 253 db_search_cmd(daddr, have_addr, dcount, modif) 254 db_expr_t daddr; 255 int have_addr; 256 db_expr_t dcount; 257 char * modif; 258 { 259 int t; 260 db_addr_t addr; 261 int size; 262 db_expr_t value; 263 db_expr_t mask; 264 db_expr_t count; 265 266 t = db_read_token(); 267 if (t == tSLASH) { 268 t = db_read_token(); 269 if (t != tIDENT) { 270 bad_modifier: 271 db_printf("Bad modifier\n"); 272 db_flush_lex(); 273 return; 274 } 275 276 if (!strcmp(db_tok_string, "b")) 277 size = 1; 278 else if (!strcmp(db_tok_string, "h")) 279 size = 2; 280 else if (!strcmp(db_tok_string, "l")) 281 size = 4; 282 else 283 goto bad_modifier; 284 } else { 285 db_unread_token(t); 286 size = 4; 287 } 288 289 if (!db_expression(&value)) { 290 db_printf("Address missing\n"); 291 db_flush_lex(); 292 return; 293 } 294 addr = (db_addr_t) value; 295 296 if (!db_expression(&value)) { 297 db_printf("Value missing\n"); 298 db_flush_lex(); 299 return; 300 } 301 302 if (!db_expression(&mask)) 303 mask = (int) ~0; 304 305 t = db_read_token(); 306 if (t == tCOMMA) { 307 if (!db_expression(&count)) { 308 db_printf("Count missing\n"); 309 db_flush_lex(); 310 return; 311 } 312 } else { 313 db_unread_token(t); 314 count = -1; /* effectively forever */ 315 } 316 db_skip_to_eol(); 317 318 db_search(addr, size, value, mask, count); 319 } 320 321 void 322 db_search(addr, size, value, mask, count) 323 register 324 db_addr_t addr; 325 int size; 326 db_expr_t value; 327 db_expr_t mask; 328 unsigned int count; 329 { 330 while (count-- != 0) { 331 db_prev = addr; 332 if ((db_get_value(addr, size, FALSE) & mask) == value) 333 break; 334 addr += size; 335 } 336 db_next = addr; 337 } 338
Indexes created Mon Sep 22 13:09:51 GMT 2025