db_examine.c revision 623
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 * $Id$ 27 */ 28 29/* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 33#include "param.h" 34#include "proc.h" 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 42char db_examine_format[TOK_STRING_SIZE] = "x"; 43 44extern db_addr_t db_disasm(/* db_addr_t, boolean_t */); 45 /* instruction disassembler */ 46 47/* 48 * Examine (print) data. 49 */ 50/*ARGSUSED*/ 51void 52db_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 67db_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 we hit a new symbol, print it */ 108 char * name; 109 db_expr_t off; 110 111 db_find_sym_and_offset(addr, &name, &off); 112 if (off == 0) 113 db_printf("%s:\t", name); 114 else 115 db_printf("\t\t"); 116 117 db_prev = addr; 118 } 119 120 switch (c) { 121 case 'r': /* signed, current radix */ 122 value = db_get_value(addr, size, TRUE); 123 addr += size; 124 db_printf("%-*r", width, value); 125 break; 126 case 'x': /* unsigned hex */ 127 value = db_get_value(addr, size, FALSE); 128 addr += size; 129 db_printf("%-*x", width, value); 130 break; 131 case 'z': /* signed hex */ 132 value = db_get_value(addr, size, TRUE); 133 addr += size; 134 db_printf("%-*z", width, value); 135 break; 136 case 'd': /* signed decimal */ 137 value = db_get_value(addr, size, TRUE); 138 addr += size; 139 db_printf("%-*d", width, value); 140 break; 141 case 'u': /* unsigned decimal */ 142 value = db_get_value(addr, size, FALSE); 143 addr += size; 144 db_printf("%-*u", width, value); 145 break; 146 case 'o': /* unsigned octal */ 147 value = db_get_value(addr, size, FALSE); 148 addr += size; 149 db_printf("%-*o", width, value); 150 break; 151 case 'c': /* character */ 152 value = db_get_value(addr, 1, FALSE); 153 addr += 1; 154 if (value >= ' ' && value <= '~') 155 db_printf("%c", value); 156 else 157 db_printf("\\%03o", value); 158 break; 159 case 's': /* null-terminated string */ 160 for (;;) { 161 value = db_get_value(addr, 1, FALSE); 162 addr += 1; 163 if (value == 0) 164 break; 165 if (value >= ' ' && value <= '~') 166 db_printf("%c", value); 167 else 168 db_printf("\\%03o", value); 169 } 170 break; 171 case 'i': /* instruction */ 172 addr = db_disasm(addr, FALSE); 173 break; 174 case 'I': /* instruction, alternate form */ 175 addr = db_disasm(addr, TRUE); 176 break; 177 default: 178 break; 179 } 180 if (db_print_position() != 0) 181 db_end_line(); 182 break; 183 } 184 } 185 } 186 db_next = addr; 187} 188 189/* 190 * Print value. 191 */ 192char db_print_format = 'x'; 193 194/*ARGSUSED*/ 195void 196db_print_cmd(addr, have_addr, count, modif) 197 db_expr_t addr; 198 int have_addr; 199 db_expr_t count; 200 char * modif; 201{ 202 db_expr_t value; 203 204 if (modif[0] != '\0') 205 db_print_format = modif[0]; 206 207 switch (db_print_format) { 208 case 'a': 209 db_printsym((db_addr_t)addr, DB_STGY_ANY); 210 break; 211 case 'r': 212 db_printf("%11r", addr); 213 break; 214 case 'x': 215 db_printf("%8x", addr); 216 break; 217 case 'z': 218 db_printf("%8z", addr); 219 break; 220 case 'd': 221 db_printf("%11d", addr); 222 break; 223 case 'u': 224 db_printf("%11u", addr); 225 break; 226 case 'o': 227 db_printf("%16o", addr); 228 break; 229 case 'c': 230 value = addr & 0xFF; 231 if (value >= ' ' && value <= '~') 232 db_printf("%c", value); 233 else 234 db_printf("\\%03o", value); 235 break; 236 } 237 db_printf("\n"); 238} 239 240db_print_loc_and_inst(loc) 241 db_addr_t loc; 242{ 243 db_printsym(loc, DB_STGY_PROC); 244 db_printf(":\t"); 245 (void) db_disasm(loc, TRUE); 246} 247 248db_strcpy(dst, src) 249 register char *dst; 250 register char *src; 251{ 252 while (*dst++ = *src++) 253 ; 254} 255 256/* 257 * Search for a value in memory. 258 * Syntax: search [/bhl] addr value [mask] [,count] 259 */ 260void 261db_search_cmd() 262{ 263 int t; 264 db_addr_t addr; 265 int size; 266 db_expr_t value; 267 db_expr_t mask; 268 unsigned int count; 269 270 t = db_read_token(); 271 if (t == tSLASH) { 272 t = db_read_token(); 273 if (t != tIDENT) { 274 bad_modifier: 275 db_printf("Bad modifier\n"); 276 db_flush_lex(); 277 return; 278 } 279 280 if (!strcmp(db_tok_string, "b")) 281 size = 1; 282 else if (!strcmp(db_tok_string, "h")) 283 size = 2; 284 else if (!strcmp(db_tok_string, "l")) 285 size = 4; 286 else 287 goto bad_modifier; 288 } else { 289 db_unread_token(t); 290 size = 4; 291 } 292 293 if (!db_expression(&addr)) { 294 db_printf("Address missing\n"); 295 db_flush_lex(); 296 return; 297 } 298 299 if (!db_expression(&value)) { 300 db_printf("Value missing\n"); 301 db_flush_lex(); 302 return; 303 } 304 305 if (!db_expression(&mask)) 306 mask = 0xffffffff; 307 308 t = db_read_token(); 309 if (t == tCOMMA) { 310 if (!db_expression(&count)) { 311 db_printf("Count missing\n"); 312 db_flush_lex(); 313 return; 314 } 315 } else { 316 db_unread_token(t); 317 count = -1; /* effectively forever */ 318 } 319 db_skip_to_eol(); 320 321 db_search(addr, size, value, mask, count); 322} 323 324db_search(addr, size, value, mask, count) 325 register 326 db_addr_t addr; 327 int size; 328 db_expr_t value; 329 db_expr_t mask; 330 unsigned int count; 331{ 332 while (count-- != 0) { 333 db_prev = addr; 334 if ((db_get_value(addr, size, FALSE) & mask) == value) 335 break; 336 addr += size; 337 } 338 db_next = addr; 339} 340