FreeBSD/Linux Kernel Cross Reference
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: src/sys/ddb/db_examine.c,v 1.35 2008/03/07 18:09:07 rwatson Exp $");
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 && !db_pager_quit) {
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 'S': /* symbol */
170 value = db_get_value(addr, sizeof(void *),
171 FALSE);
172 addr += sizeof(void *);
173 db_printsym(value, DB_STGY_ANY);
174 break;
175 case 'i': /* instruction */
176 addr = db_disasm(addr, FALSE);
177 break;
178 case 'I': /* instruction, alternate form */
179 addr = db_disasm(addr, TRUE);
180 break;
181 default:
182 break;
183 }
184 if (db_print_position() != 0)
185 db_end_line(1);
186 break;
187 }
188 }
189 }
190 db_next = addr;
191 }
192
193 /*
194 * Print value.
195 */
196 static char db_print_format = 'x';
197
198 /*ARGSUSED*/
199 void
200 db_print_cmd(addr, have_addr, count, modif)
201 db_expr_t addr;
202 boolean_t have_addr;
203 db_expr_t count;
204 char * modif;
205 {
206 db_expr_t value;
207
208 if (modif[0] != '\0')
209 db_print_format = modif[0];
210
211 switch (db_print_format) {
212 case 'a':
213 db_printsym((db_addr_t)addr, DB_STGY_ANY);
214 break;
215 case 'r':
216 db_printf("%+11lr", (long)addr);
217 break;
218 case 'x':
219 db_printf("%8lx", (unsigned long)addr);
220 break;
221 case 'z':
222 db_printf("%8ly", (long)addr);
223 break;
224 case 'd':
225 db_printf("%11ld", (long)addr);
226 break;
227 case 'u':
228 db_printf("%11lu", (unsigned long)addr);
229 break;
230 case 'o':
231 db_printf("%16lo", (unsigned long)addr);
232 break;
233 case 'c':
234 value = addr & 0xFF;
235 if (value >= ' ' && value <= '~')
236 db_printf("%c", (int)value);
237 else
238 db_printf("\\%03o", (int)value);
239 break;
240 }
241 db_printf("\n");
242 }
243
244 void
245 db_print_loc_and_inst(loc)
246 db_addr_t loc;
247 {
248 db_printsym(loc, DB_STGY_PROC);
249 db_printf(":\t");
250 (void) db_disasm(loc, TRUE);
251 }
252
253 /*
254 * Search for a value in memory.
255 * Syntax: search [/bhl] addr value [mask] [,count]
256 */
257 void
258 db_search_cmd(dummy1, dummy2, dummy3, dummy4)
259 db_expr_t dummy1;
260 boolean_t dummy2;
261 db_expr_t dummy3;
262 char * dummy4;
263 {
264 int t;
265 db_addr_t addr;
266 int size;
267 db_expr_t value;
268 db_expr_t mask;
269 db_expr_t count;
270
271 t = db_read_token();
272 if (t == tSLASH) {
273 t = db_read_token();
274 if (t != tIDENT) {
275 bad_modifier:
276 db_printf("Bad modifier\n");
277 db_flush_lex();
278 return;
279 }
280
281 if (!strcmp(db_tok_string, "b"))
282 size = 1;
283 else if (!strcmp(db_tok_string, "h"))
284 size = 2;
285 else if (!strcmp(db_tok_string, "l"))
286 size = 4;
287 else
288 goto bad_modifier;
289 } else {
290 db_unread_token(t);
291 size = 4;
292 }
293
294 if (!db_expression((db_expr_t *)&addr)) {
295 db_printf("Address missing\n");
296 db_flush_lex();
297 return;
298 }
299
300 if (!db_expression(&value)) {
301 db_printf("Value missing\n");
302 db_flush_lex();
303 return;
304 }
305
306 if (!db_expression(&mask))
307 mask = 0xffffffffUL;
308
309 t = db_read_token();
310 if (t == tCOMMA) {
311 if (!db_expression(&count)) {
312 db_printf("Count missing\n");
313 db_flush_lex();
314 return;
315 }
316 } else {
317 db_unread_token(t);
318 count = -1; /* effectively forever */
319 }
320 db_skip_to_eol();
321
322 db_search(addr, size, value, mask, count);
323 }
324
325 static void
326 db_search(addr, size, value, mask, count)
327 register
328 db_addr_t addr;
329 int size;
330 db_expr_t value;
331 db_expr_t mask;
332 unsigned int count;
333 {
334 while (count-- != 0) {
335 db_prev = addr;
336 if ((db_get_value(addr, size, FALSE) & mask) == value)
337 break;
338 addr += size;
339 }
340 db_next = addr;
341 }
342
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