| 1 | /* $NetBSD: db_examine.c,v 1.36 2015/06/06 22:06:05 matt 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 "AS IS" |
| 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@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/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: db_examine.c,v 1.36 2015/06/06 22:06:05 matt Exp $" ); |
| 34 | |
| 35 | #include <sys/param.h> |
| 36 | #include <sys/systm.h> |
| 37 | #include <sys/buf.h> |
| 38 | #include <sys/proc.h> |
| 39 | |
| 40 | #include <ddb/ddb.h> |
| 41 | |
| 42 | static char db_examine_format[TOK_STRING_SIZE] = "x" ; |
| 43 | |
| 44 | static void db_examine(db_addr_t, char *, int); |
| 45 | static void db_search(db_addr_t, int, db_expr_t, db_expr_t, unsigned int); |
| 46 | |
| 47 | /* |
| 48 | * Examine (print) data. Syntax is: |
| 49 | * x/[bhl][cdiorsuxz]* |
| 50 | * For example, the command: |
| 51 | * x/bxxxx |
| 52 | * should print: |
| 53 | * address: 01 23 45 67 |
| 54 | */ |
| 55 | /*ARGSUSED*/ |
| 56 | void |
| 57 | db_examine_cmd(db_expr_t addr, bool have_addr, db_expr_t count, |
| 58 | const char *modif) |
| 59 | { |
| 60 | if (modif[0] != '\0') |
| 61 | strlcpy(db_examine_format, modif, sizeof(db_examine_format)); |
| 62 | |
| 63 | if (count == -1) |
| 64 | count = 1; |
| 65 | |
| 66 | db_examine((db_addr_t) addr, db_examine_format, count); |
| 67 | } |
| 68 | |
| 69 | static void |
| 70 | db_examine(db_addr_t addr, char *fmt, int count) |
| 71 | { |
| 72 | int i, c; |
| 73 | db_expr_t value; |
| 74 | int size; |
| 75 | int width; |
| 76 | int bytes; |
| 77 | char * fp; |
| 78 | char tbuf[24]; |
| 79 | |
| 80 | while (--count >= 0) { |
| 81 | fp = fmt; |
| 82 | size = 4; |
| 83 | width = 12; |
| 84 | while ((c = *fp++) != 0) { |
| 85 | if (db_print_position() == 0) { |
| 86 | /* Always print the address. */ |
| 87 | db_printsym(addr, DB_STGY_ANY, db_printf); |
| 88 | db_printf(":\t" ); |
| 89 | db_prev = addr; |
| 90 | } |
| 91 | switch (c) { |
| 92 | case 'b': /* byte */ |
| 93 | size = 1; |
| 94 | width = 4; |
| 95 | break; |
| 96 | case 'h': /* half-word */ |
| 97 | size = 2; |
| 98 | width = 8; |
| 99 | break; |
| 100 | case 'l': /* long-word */ |
| 101 | size = 4; |
| 102 | width = 12; |
| 103 | break; |
| 104 | case 'q': |
| 105 | if (sizeof(db_expr_t) != sizeof(uint64_t)) { |
| 106 | size = -1; |
| 107 | db_error("q not supported\n" ); |
| 108 | /*NOTREACHED*/ |
| 109 | } |
| 110 | case 'L': /* implementation maximum */ |
| 111 | size = sizeof value; |
| 112 | width = 12 * (sizeof value / 4); |
| 113 | break; |
| 114 | case 'a': /* address */ |
| 115 | db_printf("= 0x%lx\n" , (long)addr); |
| 116 | break; |
| 117 | case 'r': /* signed, current radix */ |
| 118 | value = db_get_value(addr, size, true); |
| 119 | addr += size; |
| 120 | db_format_radix(tbuf, 24, value, false); |
| 121 | db_printf("%-*s" , width, tbuf); |
| 122 | break; |
| 123 | case 'x': /* unsigned hex */ |
| 124 | value = db_get_value(addr, size, false); |
| 125 | addr += size; |
| 126 | db_printf("%-*" DDB_EXPR_FMT "x" , width, value); |
| 127 | break; |
| 128 | case 'm': /* hex dump */ |
| 129 | /* |
| 130 | * Print off in chunks of size. Try to print 16 |
| 131 | * bytes at a time into 4 columns. This |
| 132 | * loops modify's count extra times in order |
| 133 | * to get the nicely formatted lines. |
| 134 | */ |
| 135 | |
| 136 | bytes = 0; |
| 137 | do { |
| 138 | for (i = 0; i < size; i++) { |
| 139 | value = |
| 140 | db_get_value(addr+bytes, 1, |
| 141 | false); |
| 142 | db_printf( |
| 143 | "%02" DDB_EXPR_FMT "x" , |
| 144 | value); |
| 145 | bytes++; |
| 146 | if (!(bytes % 4)) |
| 147 | db_printf(" " ); |
| 148 | } |
| 149 | } while ((bytes != 16) && count--); |
| 150 | /* True up the columns before continuing */ |
| 151 | for (i = 4; i >= (bytes / 4); i--) |
| 152 | db_printf ("\t" ); |
| 153 | /* Print chars, use . for non-printable's. */ |
| 154 | while (bytes--) { |
| 155 | value = db_get_value(addr, 1, false); |
| 156 | addr += 1; |
| 157 | if (value >= ' ' && value <= '~') |
| 158 | db_printf("%c" , (char)value); |
| 159 | else |
| 160 | db_printf("." ); |
| 161 | } |
| 162 | db_printf("\n" ); |
| 163 | break; |
| 164 | case 'z': /* signed hex */ |
| 165 | value = db_get_value(addr, size, true); |
| 166 | addr += size; |
| 167 | db_format_hex(tbuf, 24, value, false); |
| 168 | db_printf("%-*s" , width, tbuf); |
| 169 | break; |
| 170 | case 'd': /* signed decimal */ |
| 171 | value = db_get_value(addr, size, true); |
| 172 | addr += size; |
| 173 | db_printf("%-*" DDB_EXPR_FMT "d" , width, value); |
| 174 | break; |
| 175 | case 'u': /* unsigned decimal */ |
| 176 | value = db_get_value(addr, size, false); |
| 177 | addr += size; |
| 178 | db_printf("%-*" DDB_EXPR_FMT "u" , width, value); |
| 179 | break; |
| 180 | case 'o': /* unsigned octal */ |
| 181 | value = db_get_value(addr, size, false); |
| 182 | addr += size; |
| 183 | db_printf("%-*" DDB_EXPR_FMT "o" , width, value); |
| 184 | break; |
| 185 | case 'c': /* character */ |
| 186 | value = db_get_value(addr, 1, false); |
| 187 | addr += 1; |
| 188 | if (value >= ' ' && value <= '~') |
| 189 | db_printf("%c" , (char)value); |
| 190 | else |
| 191 | db_printf("\\%03o" , (int)value); |
| 192 | break; |
| 193 | case 's': /* null-terminated string */ |
| 194 | for (;;) { |
| 195 | value = db_get_value(addr, 1, false); |
| 196 | addr += 1; |
| 197 | if (value == 0) |
| 198 | break; |
| 199 | if (value >= ' ' && value <= '~') |
| 200 | db_printf("%c" , (char)value); |
| 201 | else |
| 202 | db_printf("\\%03o" , (int)value); |
| 203 | } |
| 204 | break; |
| 205 | case 'i': /* instruction */ |
| 206 | addr = db_disasm(addr, false); |
| 207 | break; |
| 208 | case 'I': /* instruction, alternate form */ |
| 209 | addr = db_disasm(addr, true); |
| 210 | break; |
| 211 | default: |
| 212 | break; |
| 213 | } |
| 214 | if (db_print_position() != 0) |
| 215 | db_end_line(); |
| 216 | } |
| 217 | } |
| 218 | db_next = addr; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * Print value. |
| 223 | */ |
| 224 | static char db_print_format = 'x'; |
| 225 | |
| 226 | /*ARGSUSED*/ |
| 227 | void |
| 228 | db_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, |
| 229 | const char *modif) |
| 230 | { |
| 231 | db_expr_t value; |
| 232 | |
| 233 | if (modif[0] != '\0') |
| 234 | db_print_format = modif[0]; |
| 235 | |
| 236 | switch (db_print_format) { |
| 237 | case 'a': |
| 238 | db_printsym((db_addr_t)addr, DB_STGY_ANY, db_printf); |
| 239 | break; |
| 240 | case 'r': |
| 241 | { |
| 242 | char tbuf[24]; |
| 243 | |
| 244 | db_format_radix(tbuf, 24, addr, false); |
| 245 | db_printf("%11s" , tbuf); |
| 246 | break; |
| 247 | } |
| 248 | case 'x': |
| 249 | db_printf("%16" DDB_EXPR_FMT "x" , addr); |
| 250 | break; |
| 251 | case 'z': |
| 252 | { |
| 253 | char tbuf[24]; |
| 254 | |
| 255 | db_format_hex(tbuf, 24, addr, false); |
| 256 | db_printf("%8s" , tbuf); |
| 257 | break; |
| 258 | } |
| 259 | case 'd': |
| 260 | db_printf("%11" DDB_EXPR_FMT "d" , addr); |
| 261 | break; |
| 262 | case 'u': |
| 263 | db_printf("%11" DDB_EXPR_FMT "u" , addr); |
| 264 | break; |
| 265 | case 'o': |
| 266 | db_printf("%15" DDB_EXPR_FMT "o" , addr); |
| 267 | break; |
| 268 | case 'c': |
| 269 | value = addr & 0xFF; |
| 270 | if (value >= ' ' && value <= '~') |
| 271 | db_printf("%c" , (char)value); |
| 272 | else |
| 273 | db_printf("\\%03o" , (int)value); |
| 274 | break; |
| 275 | } |
| 276 | db_printf("\n" ); |
| 277 | } |
| 278 | |
| 279 | void |
| 280 | db_print_loc_and_inst(db_addr_t loc) |
| 281 | { |
| 282 | |
| 283 | db_printsym(loc, DB_STGY_PROC, db_printf); |
| 284 | db_printf(":\t" ); |
| 285 | (void) db_disasm(loc, false); |
| 286 | } |
| 287 | |
| 288 | /* |
| 289 | * Search for a value in memory. |
| 290 | * Syntax: search [/bhl] addr value [mask] [,count] |
| 291 | */ |
| 292 | /*ARGSUSED*/ |
| 293 | void |
| 294 | db_search_cmd(db_expr_t daddr, bool have_addr, |
| 295 | db_expr_t dcount, const char *modif) |
| 296 | { |
| 297 | int t; |
| 298 | db_addr_t addr; |
| 299 | int size; |
| 300 | db_expr_t value; |
| 301 | db_expr_t mask; |
| 302 | db_expr_t count; |
| 303 | |
| 304 | t = db_read_token(); |
| 305 | if (t == tSLASH) { |
| 306 | t = db_read_token(); |
| 307 | if (t != tIDENT) { |
| 308 | bad_modifier: |
| 309 | db_printf("Bad modifier\n" ); |
| 310 | db_flush_lex(); |
| 311 | return; |
| 312 | } |
| 313 | |
| 314 | if (!strcmp(db_tok_string, "b" )) |
| 315 | size = 1; |
| 316 | else if (!strcmp(db_tok_string, "h" )) |
| 317 | size = 2; |
| 318 | else if (!strcmp(db_tok_string, "l" )) |
| 319 | size = 4; |
| 320 | else |
| 321 | goto bad_modifier; |
| 322 | } else { |
| 323 | db_unread_token(t); |
| 324 | size = 4; |
| 325 | } |
| 326 | |
| 327 | if (!db_expression(&value)) { |
| 328 | db_printf("Address missing\n" ); |
| 329 | db_flush_lex(); |
| 330 | return; |
| 331 | } |
| 332 | addr = (db_addr_t) value; |
| 333 | |
| 334 | if (!db_expression(&value)) { |
| 335 | db_printf("Value missing\n" ); |
| 336 | db_flush_lex(); |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | if (!db_expression(&mask)) |
| 341 | mask = (int) ~0; |
| 342 | |
| 343 | t = db_read_token(); |
| 344 | if (t == tCOMMA) { |
| 345 | if (!db_expression(&count)) { |
| 346 | db_printf("Count missing\n" ); |
| 347 | db_flush_lex(); |
| 348 | return; |
| 349 | } |
| 350 | } else { |
| 351 | db_unread_token(t); |
| 352 | count = -1; /* effectively forever */ |
| 353 | } |
| 354 | db_skip_to_eol(); |
| 355 | |
| 356 | db_search(addr, size, value, mask, count); |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask, |
| 361 | unsigned int count) |
| 362 | { |
| 363 | while (count-- != 0) { |
| 364 | db_prev = addr; |
| 365 | if ((db_get_value(addr, size, false) & mask) == value) |
| 366 | break; |
| 367 | addr += size; |
| 368 | } |
| 369 | db_next = addr; |
| 370 | } |
| 371 | |