FreeBSD-5.3/sys/ddb/db_examine.c
/*
* 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: src/sys/ddb/db_examine.c,v 1.31 2003/06/10 22:09:23 obrien Exp $");
#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) {
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 '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();
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;
}