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 /*
  27  *      Author: David B. Golub, Carnegie Mellon University
  28  *      Date:   7/90
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36
  37 #include <ddb/ddb.h>
  38
  39 #include <ddb/db_lex.h>
  40 #include <ddb/db_output.h>
  41 #include <ddb/db_command.h>
  42 #include <ddb/db_sym.h>
  43 #include <ddb/db_access.h>
  44
  45 static char     db_examine_format[TOK_STRING_SIZE] = "x";
  46
  47 static void     db_examine(db_addr_t, char *, int);
  48 static void     db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int);
  49
  50 /*
  51  * Examine (print) data.
  52  */
  53 /*ARGSUSED*/
  54 void
  55 db_examine_cmd(addr, have_addr, count, modif)
  56         db_expr_t       addr;
  57         boolean_t       have_addr;
  58         db_expr_t       count;
  59         char *          modif;
  60 {
  61         if (modif[0] != '\0')
  62             db_strcpy(db_examine_format, modif);
  63
  64         if (count == -1)
  65             count = 1;
  66
  67         db_examine((db_addr_t) addr, db_examine_format, count);
  68 }
  69
  70 static void
  71 db_examine(addr, fmt, count)
  72         register
  73         db_addr_t       addr;
  74         char *          fmt;    /* format string */
  75         int             count;  /* repeat count */
  76 {
  77         int             c;
  78         db_expr_t       value;
  79         int             size;
  80         int             width;
  81         char *          fp;
  82
  83         while (--count >= 0) {
  84             fp = fmt;
  85             size = 4;
  86             while ((c = *fp++) != 0) {
  87                 switch (c) {
  88                     case 'b':
  89                         size = 1;
  90                         break;
  91                     case 'h':
  92                         size = 2;
  93                         break;
  94                     case 'l':
  95                         size = 4;
  96                         break;
  97                     case 'g':
  98                         size = 8;
  99                         break;
 100                     case 'a':   /* address */
 101                         size = sizeof(void *);
 102                         /* always forces a new line */
 103                         if (db_print_position() != 0)
 104                             db_printf("\n");
 105                         db_prev = addr;
 106                         db_printsym(addr, DB_STGY_ANY);
 107                         db_printf(":\t");
 108                         break;
 109                     default:
 110                         if (db_print_position() == 0) {
 111                             /* Print the address. */
 112                             db_printsym(addr, DB_STGY_ANY);
 113                             db_printf(":\t");
 114                             db_prev = addr;
 115                         }
 116
 117                         width = size * 4;
 118                         switch (c) {
 119                             case 'r':   /* signed, current radix */
 120                                 value = db_get_value(addr, size, TRUE);
 121                                 addr += size;
 122                                 db_printf("%+-*lr", width, (long)value);
 123                                 break;
 124                             case 'x':   /* unsigned hex */
 125                                 value = db_get_value(addr, size, FALSE);
 126                                 addr += size;
 127                                 db_printf("%-*lx", width, (long)value);
 128                                 break;
 129                             case 'z':   /* signed hex */
 130                                 value = db_get_value(addr, size, TRUE);
 131                                 addr += size;
 132                                 db_printf("%-*ly", width, (long)value);
 133                                 break;
 134                             case 'd':   /* signed decimal */
 135                                 value = db_get_value(addr, size, TRUE);
 136                                 addr += size;
 137                                 db_printf("%-*ld", width, (long)value);
 138                                 break;
 139                             case 'u':   /* unsigned decimal */
 140                                 value = db_get_value(addr, size, FALSE);
 141                                 addr += size;
 142                                 db_printf("%-*lu", width, (long)value);
 143                                 break;
 144                             case 'o':   /* unsigned octal */
 145                                 value = db_get_value(addr, size, FALSE);
 146                                 addr += size;
 147                                 db_printf("%-*lo", width, (long)value);
 148                                 break;
 149                             case 'c':   /* character */
 150                                 value = db_get_value(addr, 1, FALSE);
 151                                 addr += 1;
 152                                 if (value >= ' ' && value <= '~')
 153                                     db_printf("%c", (int)value);
 154                                 else
 155                                     db_printf("\\%03o", (int)value);
 156                                 break;
 157                             case 's':   /* null-terminated string */
 158                                 for (;;) {
 159                                     value = db_get_value(addr, 1, FALSE);
 160                                     addr += 1;
 161                                     if (value == 0)
 162                                         break;
 163                                     if (value >= ' ' && value <= '~')
 164                                         db_printf("%c", (int)value);
 165                                     else
 166                                         db_printf("\\%03o", (int)value);
 167                                 }
 168                                 break;
 169                             case 'i':   /* instruction */
 170                                 addr = db_disasm(addr, FALSE);
 171                                 break;
 172                             case 'I':   /* instruction, alternate form */
 173                                 addr = db_disasm(addr, TRUE);
 174                                 break;
 175                             default:
 176                                 break;
 177                         }
 178                         if (db_print_position() != 0)
 179                             db_end_line();
 180                         break;
 181                 }
 182             }
 183         }
 184         db_next = addr;
 185 }
 186
 187 /*
 188  * Print value.
 189  */
 190 static char     db_print_format = 'x';
 191
 192 /*ARGSUSED*/
 193 void
 194 db_print_cmd(addr, have_addr, count, modif)
 195         db_expr_t       addr;
 196         boolean_t       have_addr;
 197         db_expr_t       count;
 198         char *          modif;
 199 {
 200         db_expr_t       value;
 201
 202         if (modif[0] != '\0')
 203             db_print_format = modif[0];
 204
 205         switch (db_print_format) {
 206             case 'a':
 207                 db_printsym((db_addr_t)addr, DB_STGY_ANY);
 208                 break;
 209             case 'r':
 210                 db_printf("%+11lr", (long)addr);
 211                 break;
 212             case 'x':
 213                 db_printf("%8lx", (unsigned long)addr);
 214                 break;
 215             case 'z':
 216                 db_printf("%8ly", (long)addr);
 217                 break;
 218             case 'd':
 219                 db_printf("%11ld", (long)addr);
 220                 break;
 221             case 'u':
 222                 db_printf("%11lu", (unsigned long)addr);
 223                 break;
 224             case 'o':
 225                 db_printf("%16lo", (unsigned long)addr);
 226                 break;
 227             case 'c':
 228                 value = addr & 0xFF;
 229                 if (value >= ' ' && value <= '~')
 230                     db_printf("%c", (int)value);
 231                 else
 232                     db_printf("\\%03o", (int)value);
 233                 break;
 234         }
 235         db_printf("\n");
 236 }
 237
 238 void
 239 db_print_loc_and_inst(loc)
 240         db_addr_t       loc;
 241 {
 242         db_printsym(loc, DB_STGY_PROC);
 243         db_printf(":\t");
 244         (void) db_disasm(loc, TRUE);
 245 }
 246
 247 /*
 248  * Search for a value in memory.
 249  * Syntax: search [/bhl] addr value [mask] [,count]
 250  */
 251 void
 252 db_search_cmd(dummy1, dummy2, dummy3, dummy4)
 253         db_expr_t       dummy1;
 254         boolean_t       dummy2;
 255         db_expr_t       dummy3;
 256         char *          dummy4;
 257 {
 258         int             t;
 259         db_addr_t       addr;
 260         int             size;
 261         db_expr_t       value;
 262         db_expr_t       mask;
 263         db_expr_t       count;
 264
 265         t = db_read_token();
 266         if (t == tSLASH) {
 267             t = db_read_token();
 268             if (t != tIDENT) {
 269               bad_modifier:
 270                 db_printf("Bad modifier\n");
 271                 db_flush_lex();
 272                 return;
 273             }
 274
 275             if (!strcmp(db_tok_string, "b"))
 276                 size = 1;
 277             else if (!strcmp(db_tok_string, "h"))
 278                 size = 2;
 279             else if (!strcmp(db_tok_string, "l"))
 280                 size = 4;
 281             else
 282                 goto bad_modifier;
 283         } else {
 284             db_unread_token(t);
 285             size = 4;
 286         }
 287
 288         if (!db_expression((db_expr_t *)&addr)) {
 289             db_printf("Address missing\n");
 290             db_flush_lex();
 291             return;
 292         }
 293
 294         if (!db_expression(&value)) {
 295             db_printf("Value missing\n");
 296             db_flush_lex();
 297             return;
 298         }
 299
 300         if (!db_expression(&mask))
 301             mask = 0xffffffffUL;
 302
 303         t = db_read_token();
 304         if (t == tCOMMA) {
 305             if (!db_expression(&count)) {
 306                 db_printf("Count missing\n");
 307                 db_flush_lex();
 308                 return;
 309             }
 310         } else {
 311             db_unread_token(t);
 312             count = -1;         /* effectively forever */
 313         }
 314         db_skip_to_eol();
 315
 316         db_search(addr, size, value, mask, count);
 317 }
 318
 319 static void
 320 db_search(addr, size, value, mask, count)
 321         register
 322         db_addr_t       addr;
 323         int             size;
 324         db_expr_t       value;
 325         db_expr_t       mask;
 326         unsigned int    count;
 327 {
 328         while (count-- != 0) {
 329                 db_prev = addr;
 330                 if ((db_get_value(addr, size, FALSE) & mask) == value)
 331                         break;
 332                 addr += size;
 333         }
 334         db_next = addr;
 335 }