sys/ddb/db_examine.c

   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: src/sys/ddb/db_examine.c,v 1.27 1999/08/28 00:41:07 peter Exp $
  27  * $DragonFly: src/sys/ddb/db_examine.c,v 1.5 2003/11/08 03:06:53 dillon Exp $
  28  */
  29
  30 /*
  31  *      Author: David B. Golub, Carnegie Mellon University
  32  *      Date:   7/90
  33  */
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37
  38 #include <ddb/ddb.h>
  39
  40 #include <ddb/db_lex.h>
  41 #include <ddb/db_output.h>
  42 #include <ddb/db_command.h>
  43 #include <ddb/db_sym.h>
  44 #include <ddb/db_access.h>
  45
  46 static char     db_examine_format[TOK_STRING_SIZE] = "x";
  47
  48 static void     db_examine (db_addr_t, char *, int);
  49 static void     db_search (db_addr_t, int, db_expr_t, db_expr_t, u_int);
  50
  51 /*
  52  * Examine (print) data.
  53  */
  54 /*ARGSUSED*/
  55 void
  56 db_examine_cmd(addr, have_addr, count, modif)
  57         db_expr_t       addr;
  58         boolean_t       have_addr;
  59         db_expr_t       count;
  60         char *          modif;
  61 {
  62         if (modif[0] != '\0')
  63             db_strcpy(db_examine_format, modif);
  64
  65         if (count == -1)
  66             count = 1;
  67
  68         db_examine((db_addr_t) addr, db_examine_format, count);
  69 }
  70
  71 static void
  72 db_examine(addr, fmt, count)
  73
  74         db_addr_t       addr;
  75         char *          fmt;    /* format string */
  76         int             count;  /* repeat count */
  77 {
  78         int             c;
  79         db_expr_t       value;
  80         int             size;
  81         int             width;
  82         char *          fp;
  83
  84         while (--count >= 0) {
  85             fp = fmt;
  86             size = 4;
  87             width = 16;
  88             while ((c = *fp++) != 0) {
  89                 switch (c) {
  90                     case 'b':
  91                         size = 1;
  92                         width = 4;
  93                         break;
  94                     case 'h':
  95                         size = 2;
  96                         width = 8;
  97                         break;
  98                     case 'l':
  99                         size = 4;
 100                         width = 16;
 101                         break;
 102                     case 'g':
 103                         size = 8;
 104                         width = 32;
 105                         break;
 106                     case 'a':   /* address */
 107                         /* always forces a new line */
 108                         if (db_print_position() != 0)
 109                             db_printf("\n");
 110                         db_prev = addr;
 111                         db_printsym(addr, DB_STGY_ANY);
 112                         db_printf(":\t");
 113                         break;
 114                     default:
 115                         if (db_print_position() == 0) {
 116                             /* Print the address. */
 117                             db_printsym(addr, DB_STGY_ANY);
 118                             db_printf(":\t");
 119                             db_prev = addr;
 120                         }
 121
 122                         switch (c) {
 123                             case 'r':   /* signed, current radix */
 124                                 value = db_get_value(addr, size, TRUE);
 125                                 addr += size;
 126                                 db_printf("%+-*lr", width, (long)value);
 127                                 break;
 128                             case 'x':   /* unsigned hex */
 129                                 value = db_get_value(addr, size, FALSE);
 130                                 addr += size;
 131                                 db_printf("%-*lx", width, (long)value);
 132                                 break;
 133                             case 'z':   /* signed hex */
 134                                 value = db_get_value(addr, size, TRUE);
 135                                 addr += size;
 136                                 db_printf("%-*lz", width, (long)value);
 137                                 break;
 138                             case 'd':   /* signed decimal */
 139                                 value = db_get_value(addr, size, TRUE);
 140                                 addr += size;
 141                                 db_printf("%-*ld", width, (long)value);
 142                                 break;
 143                             case 'u':   /* unsigned decimal */
 144                                 value = db_get_value(addr, size, FALSE);
 145                                 addr += size;
 146                                 db_printf("%-*lu", width, (long)value);
 147                                 break;
 148                             case 'o':   /* unsigned octal */
 149                                 value = db_get_value(addr, size, FALSE);
 150                                 addr += size;
 151                                 db_printf("%-*lo", width, (long)value);
 152                                 break;
 153                             case 'c':   /* character */
 154                                 value = db_get_value(addr, 1, FALSE);
 155                                 addr += 1;
 156                                 if (value >= ' ' && value <= '~')
 157                                     db_printf("%c", (int)value);
 158                                 else
 159                                     db_printf("\\%03o", (int)value);
 160                                 break;
 161                             case 's':   /* null-terminated string */
 162                                 for (;;) {
 163                                     value = db_get_value(addr, 1, FALSE);
 164                                     addr += 1;
 165                                     if (value == 0)
 166                                         break;
 167                                     if (value >= ' ' && value <= '~')
 168                                         db_printf("%c", (int)value);
 169                                     else
 170                                         db_printf("\\%03o", (int)value);
 171                                 }
 172                                 break;
 173                             case 'i':   /* instruction */
 174                                 addr = db_disasm(addr, FALSE, NULL);
 175                                 break;
 176                             case 'I':   /* instruction, alternate form */
 177                                 addr = db_disasm(addr, TRUE, NULL);
 178                                 break;
 179                             default:
 180                                 break;
 181                         }
 182                         if (db_print_position() != 0)
 183                             db_end_line();
 184                         break;
 185                 }
 186             }
 187         }
 188         db_next = addr;
 189 }
 190
 191 /*
 192  * Print value.
 193  */
 194 static char     db_print_format = 'x';
 195
 196 /*ARGSUSED*/
 197 void
 198 db_print_cmd(addr, have_addr, count, modif)
 199         db_expr_t       addr;
 200         boolean_t       have_addr;
 201         db_expr_t       count;
 202         char *          modif;
 203 {
 204         db_expr_t       value;
 205
 206         if (modif[0] != '\0')
 207             db_print_format = modif[0];
 208
 209         switch (db_print_format) {
 210             case 'a':
 211                 db_printsym((db_addr_t)addr, DB_STGY_ANY);
 212                 break;
 213             case 'r':
 214                 db_printf("%+11lr", (long)addr);
 215                 break;
 216             case 'x':
 217                 db_printf("%8lx", (unsigned long)addr);
 218                 break;
 219             case 'z':
 220                 db_printf("%8lz", (long)addr);
 221                 break;
 222             case 'd':
 223                 db_printf("%11ld", (long)addr);
 224                 break;
 225             case 'u':
 226                 db_printf("%11lu", (unsigned long)addr);
 227                 break;
 228             case 'o':
 229                 db_printf("%16lo", (unsigned long)addr);
 230                 break;
 231             case 'c':
 232                 value = addr & 0xFF;
 233                 if (value >= ' ' && value <= '~')
 234                     db_printf("%c", (int)value);
 235                 else
 236                     db_printf("\\%03o", (int)value);
 237                 break;
 238         }
 239         db_printf("\n");
 240 }
 241
 242 void
 243 db_print_loc_and_inst(db_addr_t loc, db_regs_t *regs)
 244 {
 245         db_printsym(loc, DB_STGY_PROC);
 246         db_printf(":\t");
 247         (void) db_disasm(loc, TRUE, regs);
 248 }
 249
 250 /*
 251  * Search for a value in memory.
 252  * Syntax: search [/bhl] addr value [mask] [,count]
 253  */
 254 void
 255 db_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
 322 static void
 323 db_search(addr, size, value, mask, count)
 324
 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 }