db_examine.c revision 1.5
1 /* $NetBSD: db_examine.c,v 1.5 1994/06/30 12:49:54 gwr 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 42 char db_examine_format[TOK_STRING_SIZE] = "x"; 43 44 extern db_addr_t db_disasm(/* db_addr_t, boolean_t */); 45 /* instruction disassembler */ 46 47 /* 48 * Examine (print) data. 49 */ 50 /*ARGSUSED*/ 51 void 52 db_examine_cmd(addr, have_addr, count, modif) 53 db_expr_t addr; 54 int have_addr; 55 db_expr_t count; 56 char * modif; 57 { 58 if (modif[0] != '\0') 59 db_strcpy(db_examine_format, modif); 60 61 if (count == -1) 62 count = 1; 63 64 db_examine((db_addr_t) addr, db_examine_format, count); 65 } 66 67 db_examine(addr, fmt, count) 68 register 69 db_addr_t addr; 70 char * fmt; /* format string */ 71 int count; /* repeat count */ 72 { 73 int c; 74 db_expr_t value; 75 int size; 76 int width; 77 char * fp; 78 79 while (--count >= 0) { 80 fp = fmt; 81 size = 4; 82 width = 16; 83 while ((c = *fp++) != 0) { 84 switch (c) { 85 case 'b': 86 size = 1; 87 width = 4; 88 break; 89 case 'h': 90 size = 2; 91 width = 8; 92 break; 93 case 'l': 94 size = 4; 95 width = 16; 96 break; 97 case 'a': /* address */ 98 /* always forces a new line */ 99 if (db_print_position() != 0) 100 db_printf("\n"); 101 db_prev = addr; 102 db_printsym(addr, DB_STGY_ANY); 103 db_printf(":\t"); 104 break; 105 default: 106 if (db_print_position() == 0) { 107 #if 0 108 /* If we hit a new symbol, print it */ 109 char * name; 110 db_expr_t off; 111 112 db_find_sym_and_offset(addr, &name, &off); 113 if (off == 0) 114 db_printf("%s:\t", name); 115 else 116 db_printf("\t\t"); 117 #else 118 /* Always print the address. */ 119 db_printsym(addr, DB_STGY_ANY); 120 db_printf(":\t"); 121 #endif 122 123 db_prev = addr; 124 } 125 126 switch (c) { 127 case 'r': /* signed, current radix */ 128 value = db_get_value(addr, size, TRUE); 129 addr += size; 130 db_printf("%-*r", width, value); 131 break; 132 case 'x': /* unsigned hex */ 133 value = db_get_value(addr, size, FALSE); 134 addr += size; 135 db_printf("%-*x", width, value); 136 break; 137 case 'z': /* signed hex */ 138 value = db_get_value(addr, size, TRUE); 139 addr += size; 140 db_printf("%-*z", width, value); 141 break; 142 case 'd': /* signed decimal */ 143 value = db_get_value(addr, size, TRUE); 144 addr += size; 145 db_printf("%-*d", width, value); 146 break; 147 case 'u': /* unsigned decimal */ 148 value = db_get_value(addr, size, FALSE); 149 addr += size; 150 db_printf("%-*u", width, value); 151 break; 152 case 'o': /* unsigned octal */ 153 value = db_get_value(addr, size, FALSE); 154 addr += size; 155 db_printf("%-*o", width, value); 156 break; 157 case 'c': /* character */ 158 value = db_get_value(addr, 1, FALSE); 159 addr += 1; 160 if (value >= ' ' && value <= '~') 161 db_printf("%c", value); 162 else 163 db_printf("\\%03o", value); 164 break; 165 case 's': /* null-terminated string */ 166 for (;;) { 167 value = db_get_value(addr, 1, FALSE); 168 addr += 1; 169 if (value == 0) 170 break; 171 if (value >= ' ' && value <= '~') 172 db_printf("%c", value); 173 else 174 db_printf("\\%03o", value); 175 } 176 break; 177 case 'i': /* instruction */ 178 addr = db_disasm(addr, FALSE); 179 break; 180 case 'I': /* instruction, alternate form */ 181 addr = db_disasm(addr, TRUE); 182 break; 183 default: 184 break; 185 } 186 if (db_print_position() != 0) 187 db_end_line(); 188 break; 189 } 190 } 191 } 192 db_next = addr; 193 } 194 195 /* 196 * Print value. 197 */ 198 char db_print_format = 'x'; 199 200 /*ARGSUSED*/ 201 void 202 db_print_cmd(addr, have_addr, count, modif) 203 db_expr_t addr; 204 int have_addr; 205 db_expr_t count; 206 char * modif; 207 { 208 db_expr_t value; 209 210 if (modif[0] != '\0') 211 db_print_format = modif[0]; 212 213 switch (db_print_format) { 214 case 'a': 215 db_printsym((db_addr_t)addr, DB_STGY_ANY); 216 break; 217 case 'r': 218 db_printf("%11r", addr); 219 break; 220 case 'x': 221 db_printf("%8x", addr); 222 break; 223 case 'z': 224 db_printf("%8z", addr); 225 break; 226 case 'd': 227 db_printf("%11d", addr); 228 break; 229 case 'u': 230 db_printf("%11u", addr); 231 break; 232 case 'o': 233 db_printf("%16o", addr); 234 break; 235 case 'c': 236 value = addr & 0xFF; 237 if (value >= ' ' && value <= '~') 238 db_printf("%c", value); 239 else 240 db_printf("\\%03o", value); 241 break; 242 } 243 db_printf("\n"); 244 } 245 246 db_print_loc_and_inst(loc) 247 db_addr_t loc; 248 { 249 db_printsym(loc, DB_STGY_PROC); 250 db_printf(":\t"); 251 (void) db_disasm(loc, TRUE); 252 } 253 254 db_strcpy(dst, src) 255 register char *dst; 256 register char *src; 257 { 258 while (*dst++ = *src++) 259 ; 260 } 261 262 /* 263 * Search for a value in memory. 264 * Syntax: search [/bhl] addr value [mask] [,count] 265 */ 266 void 267 db_search_cmd() 268 { 269 int t; 270 db_addr_t addr; 271 int size; 272 db_expr_t value; 273 db_expr_t mask; 274 unsigned int count; 275 276 t = db_read_token(); 277 if (t == tSLASH) { 278 t = db_read_token(); 279 if (t != tIDENT) { 280 bad_modifier: 281 db_printf("Bad modifier\n"); 282 db_flush_lex(); 283 return; 284 } 285 286 if (!strcmp(db_tok_string, "b")) 287 size = 1; 288 else if (!strcmp(db_tok_string, "h")) 289 size = 2; 290 else if (!strcmp(db_tok_string, "l")) 291 size = 4; 292 else 293 goto bad_modifier; 294 } else { 295 db_unread_token(t); 296 size = 4; 297 } 298 299 if (!db_expression(&addr)) { 300 db_printf("Address missing\n"); 301 db_flush_lex(); 302 return; 303 } 304 305 if (!db_expression(&value)) { 306 db_printf("Value missing\n"); 307 db_flush_lex(); 308 return; 309 } 310 311 if (!db_expression(&mask)) 312 mask = 0xffffffff; 313 314 t = db_read_token(); 315 if (t == tCOMMA) { 316 if (!db_expression(&count)) { 317 db_printf("Count missing\n"); 318 db_flush_lex(); 319 return; 320 } 321 } else { 322 db_unread_token(t); 323 count = -1; /* effectively forever */ 324 } 325 db_skip_to_eol(); 326 327 db_search(addr, size, value, mask, count); 328 } 329 330 db_search(addr, size, value, mask, count) 331 register 332 db_addr_t addr; 333 int size; 334 db_expr_t value; 335 db_expr_t mask; 336 unsigned int count; 337 { 338 while (count-- != 0) { 339 db_prev = addr; 340 if ((db_get_value(addr, size, FALSE) & mask) == value) 341 break; 342 addr += size; 343 } 344 db_next = addr; 345 } 346
Indexes created Fri Oct 03 02:09:57 GMT 2025