summaryrefslogtreecommitdiffstats
path: root/sys/ddb/db_examine.c
blob: fc4f47285f000b42eb01b75d519b89bd91877fc0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
/*-
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */
/*
 *	Author: David B. Golub, Carnegie Mellon University
 *	Date:	7/90
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>

#include <ddb/ddb.h>

#include <ddb/db_lex.h>
#include <ddb/db_output.h>
#include <ddb/db_command.h>
#include <ddb/db_sym.h>
#include <ddb/db_access.h>

static char	db_examine_format[TOK_STRING_SIZE] = "x";

static void	db_examine(db_addr_t, char *, int);
static void	db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int);

/*
 * Examine (print) data.
 */
/*ARGSUSED*/
void
db_examine_cmd(addr, have_addr, count, modif)
	db_expr_t	addr;
	boolean_t	have_addr;
	db_expr_t	count;
	char *		modif;
{
	if (modif[0] != '\0')
	    db_strcpy(db_examine_format, modif);

	if (count == -1)
	    count = 1;

	db_examine((db_addr_t) addr, db_examine_format, count);
}

static void
db_examine(addr, fmt, count)
	register
	db_addr_t	addr;
	char *		fmt;	/* format string */
	int		count;	/* repeat count */
{
	int		c;
	db_expr_t	value;
	int		size;
	int		width;
	char *		fp;

	while (--count >= 0 && !db_pager_quit) {
	    fp = fmt;
	    size = 4;
	    while ((c = *fp++) != 0) {
		switch (c) {
		    case 'b':
			size = 1;
			break;
		    case 'h':
			size = 2;
			break;
		    case 'l':
			size = 4;
			break;
		    case 'g':
			size = 8;
			break;
		    case 'a':	/* address */
			size = sizeof(void *);
			/* always forces a new line */
			if (db_print_position() != 0)
			    db_printf("\n");
			db_prev = addr;
			db_printsym(addr, DB_STGY_ANY);
			db_printf(":\t");
			break;
		    default:
			if (db_print_position() == 0) {
			    /* Print the address. */
			    db_printsym(addr, DB_STGY_ANY);
			    db_printf(":\t");
			    db_prev = addr;
			}

			width = size * 4;
			switch (c) {
			    case 'r':	/* signed, current radix */
				value = db_get_value(addr, size, TRUE);
				addr += size;
				db_printf("%+-*lr", width, (long)value);
				break;
			    case 'x':	/* unsigned hex */
				value = db_get_value(addr, size, FALSE);
				addr += size;
				db_printf("%-*lx", width, (long)value);
				break;
			    case 'z':	/* signed hex */
				value = db_get_value(addr, size, TRUE);
				addr += size;
				db_printf("%-*ly", width, (long)value);
				break;
			    case 'd':	/* signed decimal */
				value = db_get_value(addr, size, TRUE);
				addr += size;
				db_printf("%-*ld", width, (long)value);
				break;
			    case 'u':	/* unsigned decimal */
				value = db_get_value(addr, size, FALSE);
				addr += size;
				db_printf("%-*lu", width, (long)value);
				break;
			    case 'o':	/* unsigned octal */
				value = db_get_value(addr, size, FALSE);
				addr += size;
				db_printf("%-*lo", width, (long)value);
				break;
			    case 'c':	/* character */
				value = db_get_value(addr, 1, FALSE);
				addr += 1;
				if (value >= ' ' && value <= '~')
				    db_printf("%c", (int)value);
				else
				    db_printf("\\%03o", (int)value);
				break;
			    case 's':	/* null-terminated string */
				for (;;) {
				    value = db_get_value(addr, 1, FALSE);
				    addr += 1;
				    if (value == 0)
					break;
				    if (value >= ' ' && value <= '~')
					db_printf("%c", (int)value);
				    else
					db_printf("\\%03o", (int)value);
				}
				break;
			    case 'S':	/* symbol */
				value = db_get_value(addr, sizeof(void *),
				    FALSE);
				addr += sizeof(void *);
				db_printsym(value, DB_STGY_ANY);
				break;
			    case 'i':	/* instruction */
				addr = db_disasm(addr, FALSE);
				break;
			    case 'I':	/* instruction, alternate form */
				addr = db_disasm(addr, TRUE);
				break;
			    default:
				break;
			}
			if (db_print_position() != 0)
			    db_end_line(1);
			break;
		}
	    }
	}
	db_next = addr;
}

/*
 * Print value.
 */
static char	db_print_format = 'x';

/*ARGSUSED*/
void
db_print_cmd(addr, have_addr, count, modif)
	db_expr_t	addr;
	boolean_t	have_addr;
	db_expr_t	count;
	char *		modif;
{
	db_expr_t	value;

	if (modif[0] != '\0')
	    db_print_format = modif[0];

	switch (db_print_format) {
	    case 'a':
		db_printsym((db_addr_t)addr, DB_STGY_ANY);
		break;
	    case 'r':
		db_printf("%+11lr", (long)addr);
		break;
	    case 'x':
		db_printf("%8lx", (unsigned long)addr);
		break;
	    case 'z':
		db_printf("%8ly", (long)addr);
		break;
	    case 'd':
		db_printf("%11ld", (long)addr);
		break;
	    case 'u':
		db_printf("%11lu", (unsigned long)addr);
		break;
	    case 'o':
		db_printf("%16lo", (unsigned long)addr);
		break;
	    case 'c':
		value = addr & 0xFF;
		if (value >= ' ' && value <= '~')
		    db_printf("%c", (int)value);
		else
		    db_printf("\\%03o", (int)value);
		break;
	}
	db_printf("\n");
}

void
db_print_loc_and_inst(loc)
	db_addr_t	loc;
{
	db_printsym(loc, DB_STGY_PROC);
	db_printf(":\t");
	(void) db_disasm(loc, TRUE);
}

/*
 * Search for a value in memory.
 * Syntax: search [/bhl] addr value [mask] [,count]
 */
void
db_search_cmd(dummy1, dummy2, dummy3, dummy4)
	db_expr_t	dummy1;
	boolean_t	dummy2;
	db_expr_t	dummy3;
	char *		dummy4;
{
	int		t;
	db_addr_t	addr;
	int		size;
	db_expr_t	value;
	db_expr_t	mask;
	db_expr_t	count;

	t = db_read_token();
	if (t == tSLASH) {
	    t = db_read_token();
	    if (t != tIDENT) {
	      bad_modifier:
		db_printf("Bad modifier\n");
		db_flush_lex();
		return;
	    }

	    if (!strcmp(db_tok_string, "b"))
		size = 1;
	    else if (!strcmp(db_tok_string, "h"))
		size = 2;
	    else if (!strcmp(db_tok_string, "l"))
		size = 4;
	    else
		goto bad_modifier;
	} else {
	    db_unread_token(t);
	    size = 4;
	}

	if (!db_expression((db_expr_t *)&addr)) {
	    db_printf("Address missing\n");
	    db_flush_lex();
	    return;
	}

	if (!db_expression(&value)) {
	    db_printf("Value missing\n");
	    db_flush_lex();
	    return;
	}

	if (!db_expression(&mask))
	    mask = 0xffffffffUL;

	t = db_read_token();
	if (t == tCOMMA) {
	    if (!db_expression(&count)) {
		db_printf("Count missing\n");
		db_flush_lex();
		return;
	    }
	} else {
	    db_unread_token(t);
	    count = -1;		/* effectively forever */
	}
	db_skip_to_eol();

	db_search(addr, size, value, mask, count);
}

static void
db_search(addr, size, value, mask, count)
	register
	db_addr_t	addr;
	int		size;
	db_expr_t	value;
	db_expr_t	mask;
	unsigned int	count;
{
	while (count-- != 0) {
		db_prev = addr;
		if ((db_get_value(addr, size, FALSE) & mask) == value)
			break;
		addr += size;
	}
	db_next = addr;
}
OpenPOWER on IntegriCloud