db_examine.c revision 4
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/* 27 * HISTORY 28 * $Log: db_examine.c,v $ 29 * Revision 1.1 1992/03/25 21:45:07 pace 30 * Initial revision 31 * 32 * Revision 2.4 91/02/05 17:06:20 mrt 33 * Changed to new Mach copyright 34 * [91/01/31 16:17:37 mrt] 35 * 36 * Revision 2.3 90/11/07 16:49:23 rpd 37 * Added db_search_cmd, db_search. 38 * [90/11/06 rpd] 39 * 40 * Revision 2.2 90/08/27 21:50:38 dbg 41 * Add 'r', 'z' to print and examine formats. 42 * Change calling sequence of db_disasm. 43 * db_examine sets db_prev and db_next instead of explicitly 44 * advancing dot. 45 * [90/08/20 dbg] 46 * Reflected changes in db_printsym()'s calling seq. 47 * [90/08/20 af] 48 * Reduce lint. 49 * [90/08/07 dbg] 50 * Created. 51 * [90/07/25 dbg] 52 * 53 */ 54/* 55 * Author: David B. Golub, Carnegie Mellon University 56 * Date: 7/90 57 */ 58#include "param.h" 59#include "proc.h" 60#include <machine/db_machdep.h> /* type definitions */ 61 62#include <ddb/db_lex.h> 63#include <ddb/db_output.h> 64#include <ddb/db_command.h> 65#include <ddb/db_sym.h> 66 67char db_examine_format[TOK_STRING_SIZE] = "x"; 68 69extern db_addr_t db_disasm(/* db_addr_t, boolean_t */); 70 /* instruction disassembler */ 71 72/* 73 * Examine (print) data. 74 */ 75/*ARGSUSED*/ 76void 77db_examine_cmd(addr, have_addr, count, modif) 78 db_expr_t addr; 79 int have_addr; 80 db_expr_t count; 81 char * modif; 82{ 83 if (modif[0] != '\0') 84 db_strcpy(db_examine_format, modif); 85 86 if (count == -1) 87 count = 1; 88 89 db_examine((db_addr_t) addr, db_examine_format, count); 90} 91 92db_examine(addr, fmt, count) 93 register 94 db_addr_t addr; 95 char * fmt; /* format string */ 96 int count; /* repeat count */ 97{ 98 int c; 99 db_expr_t value; 100 int size; 101 int width; 102 char * fp; 103 104 while (--count >= 0) { 105 fp = fmt; 106 size = 4; 107 width = 16; 108 while ((c = *fp++) != 0) { 109 switch (c) { 110 case 'b': 111 size = 1; 112 width = 4; 113 break; 114 case 'h': 115 size = 2; 116 width = 8; 117 break; 118 case 'l': 119 size = 4; 120 width = 16; 121 break; 122 case 'a': /* address */ 123 /* always forces a new line */ 124 if (db_print_position() != 0) 125 db_printf("\n"); 126 db_prev = addr; 127 db_printsym(addr, DB_STGY_ANY); 128 db_printf(":\t"); 129 break; 130 default: 131 if (db_print_position() == 0) { 132 /* If we hit a new symbol, print it */ 133 char * name; 134 db_expr_t off; 135 136 db_find_sym_and_offset(addr, &name, &off); 137 if (off == 0) 138 db_printf("%s:\t", name); 139 else 140 db_printf("\t\t"); 141 142 db_prev = addr; 143 } 144 145 switch (c) { 146 case 'r': /* signed, current radix */ 147 value = db_get_value(addr, size, TRUE); 148 addr += size; 149 db_printf("%-*r", width, value); 150 break; 151 case 'x': /* unsigned hex */ 152 value = db_get_value(addr, size, FALSE); 153 addr += size; 154 db_printf("%-*x", width, value); 155 break; 156 case 'z': /* signed hex */ 157 value = db_get_value(addr, size, TRUE); 158 addr += size; 159 db_printf("%-*z", width, value); 160 break; 161 case 'd': /* signed decimal */ 162 value = db_get_value(addr, size, TRUE); 163 addr += size; 164 db_printf("%-*d", width, value); 165 break; 166 case 'u': /* unsigned decimal */ 167 value = db_get_value(addr, size, FALSE); 168 addr += size; 169 db_printf("%-*u", width, value); 170 break; 171 case 'o': /* unsigned octal */ 172 value = db_get_value(addr, size, FALSE); 173 addr += size; 174 db_printf("%-*o", width, value); 175 break; 176 case 'c': /* character */ 177 value = db_get_value(addr, 1, FALSE); 178 addr += 1; 179 if (value >= ' ' && value <= '~') 180 db_printf("%c", value); 181 else 182 db_printf("\\%03o", value); 183 break; 184 case 's': /* null-terminated string */ 185 for (;;) { 186 value = db_get_value(addr, 1, FALSE); 187 addr += 1; 188 if (value == 0) 189 break; 190 if (value >= ' ' && value <= '~') 191 db_printf("%c", value); 192 else 193 db_printf("\\%03o", value); 194 } 195 break; 196 case 'i': /* instruction */ 197 addr = db_disasm(addr, FALSE); 198 break; 199 case 'I': /* instruction, alternate form */ 200 addr = db_disasm(addr, TRUE); 201 break; 202 default: 203 break; 204 } 205 if (db_print_position() != 0) 206 db_end_line(); 207 break; 208 } 209 } 210 } 211 db_next = addr; 212} 213 214/* 215 * Print value. 216 */ 217char db_print_format = 'x'; 218 219/*ARGSUSED*/ 220void 221db_print_cmd(addr, have_addr, count, modif) 222 db_expr_t addr; 223 int have_addr; 224 db_expr_t count; 225 char * modif; 226{ 227 db_expr_t value; 228 229 if (modif[0] != '\0') 230 db_print_format = modif[0]; 231 232 switch (db_print_format) { 233 case 'a': 234 db_printsym((db_addr_t)addr, DB_STGY_ANY); 235 break; 236 case 'r': 237 db_printf("%11r", addr); 238 break; 239 case 'x': 240 db_printf("%8x", addr); 241 break; 242 case 'z': 243 db_printf("%8z", addr); 244 break; 245 case 'd': 246 db_printf("%11d", addr); 247 break; 248 case 'u': 249 db_printf("%11u", addr); 250 break; 251 case 'o': 252 db_printf("%16o", addr); 253 break; 254 case 'c': 255 value = addr & 0xFF; 256 if (value >= ' ' && value <= '~') 257 db_printf("%c", value); 258 else 259 db_printf("\\%03o", value); 260 break; 261 } 262 db_printf("\n"); 263} 264 265db_print_loc_and_inst(loc) 266 db_addr_t loc; 267{ 268 db_printsym(loc, DB_STGY_PROC); 269 db_printf(":\t"); 270 (void) db_disasm(loc, TRUE); 271} 272 273db_strcpy(dst, src) 274 register char *dst; 275 register char *src; 276{ 277 while (*dst++ = *src++) 278 ; 279} 280 281/* 282 * Search for a value in memory. 283 * Syntax: search [/bhl] addr value [mask] [,count] 284 */ 285void 286db_search_cmd() 287{ 288 int t; 289 db_addr_t addr; 290 int size; 291 db_expr_t value; 292 db_expr_t mask; 293 unsigned int count; 294 295 t = db_read_token(); 296 if (t == tSLASH) { 297 t = db_read_token(); 298 if (t != tIDENT) { 299 bad_modifier: 300 db_printf("Bad modifier\n"); 301 db_flush_lex(); 302 return; 303 } 304 305 if (!strcmp(db_tok_string, "b")) 306 size = 1; 307 else if (!strcmp(db_tok_string, "h")) 308 size = 2; 309 else if (!strcmp(db_tok_string, "l")) 310 size = 4; 311 else 312 goto bad_modifier; 313 } else { 314 db_unread_token(t); 315 size = 4; 316 } 317 318 if (!db_expression(&addr)) { 319 db_printf("Address missing\n"); 320 db_flush_lex(); 321 return; 322 } 323 324 if (!db_expression(&value)) { 325 db_printf("Value missing\n"); 326 db_flush_lex(); 327 return; 328 } 329 330 if (!db_expression(&mask)) 331 mask = 0xffffffff; 332 333 t = db_read_token(); 334 if (t == tCOMMA) { 335 if (!db_expression(&count)) { 336 db_printf("Count missing\n"); 337 db_flush_lex(); 338 return; 339 } 340 } else { 341 db_unread_token(t); 342 count = -1; /* effectively forever */ 343 } 344 db_skip_to_eol(); 345 346 db_search(addr, size, value, mask, count); 347} 348 349db_search(addr, size, value, mask, count) 350 register 351 db_addr_t addr; 352 int size; 353 db_expr_t value; 354 db_expr_t mask; 355 unsigned int count; 356{ 357 while (count-- != 0) { 358 db_prev = addr; 359 if ((db_get_value(addr, size, FALSE) & mask) == value) 360 break; 361 addr += size; 362 } 363 db_next = addr; 364} 365