330 lines
7.2 KiB
C
330 lines
7.2 KiB
C
/*-
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* SPDX-License-Identifier: MIT-CMU
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*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <ddb/ddb.h>
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#include <ddb/db_lex.h>
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#include <ddb/db_output.h>
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#include <ddb/db_command.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_access.h>
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static char db_examine_format[TOK_STRING_SIZE] = "x";
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static void db_examine(db_addr_t, char *, int);
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static void db_search(db_addr_t, int, db_expr_t, db_expr_t, u_int);
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/*
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* Examine (print) data.
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*/
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/*ARGSUSED*/
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void
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db_examine_cmd(db_expr_t addr, bool have_addr, db_expr_t count, char *modif)
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{
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if (modif[0] != '\0')
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db_strcpy(db_examine_format, modif);
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if (count == -1)
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count = 1;
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db_examine((db_addr_t) addr, db_examine_format, count);
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}
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static void
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db_examine(db_addr_t addr, char *fmt, int count)
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{
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int c;
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db_expr_t value;
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int size;
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int width;
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char * fp;
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while (--count >= 0 && !db_pager_quit) {
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fp = fmt;
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size = 4;
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while ((c = *fp++) != 0) {
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switch (c) {
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case 'b':
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size = 1;
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break;
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case 'h':
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size = 2;
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break;
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case 'l':
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size = 4;
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break;
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case 'g':
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size = 8;
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break;
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case 'a': /* address */
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size = sizeof(void *);
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/* always forces a new line */
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if (db_print_position() != 0)
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db_printf("\n");
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db_prev = addr;
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db_printsym(addr, DB_STGY_ANY);
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db_printf(":\t");
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break;
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default:
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if (db_print_position() == 0) {
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/* Print the address. */
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db_printsym(addr, DB_STGY_ANY);
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db_printf(":\t");
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db_prev = addr;
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}
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width = size * 4;
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switch (c) {
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case 'r': /* signed, current radix */
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value = db_get_value(addr, size, true);
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addr += size;
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db_printf("%+-*lr", width, (long)value);
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break;
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case 'x': /* unsigned hex */
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value = db_get_value(addr, size, false);
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addr += size;
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db_printf("%-*lx", width, (long)value);
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break;
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case 'z': /* signed hex */
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value = db_get_value(addr, size, true);
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addr += size;
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db_printf("%-*ly", width, (long)value);
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break;
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case 'd': /* signed decimal */
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value = db_get_value(addr, size, true);
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addr += size;
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db_printf("%-*ld", width, (long)value);
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break;
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case 'u': /* unsigned decimal */
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value = db_get_value(addr, size, false);
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addr += size;
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db_printf("%-*lu", width, (long)value);
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break;
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case 'o': /* unsigned octal */
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value = db_get_value(addr, size, false);
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addr += size;
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db_printf("%-*lo", width, (long)value);
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break;
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case 'c': /* character */
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value = db_get_value(addr, 1, false);
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addr += 1;
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if (value >= ' ' && value <= '~')
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db_printf("%c", (int)value);
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else
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db_printf("\\%03o", (int)value);
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break;
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case 's': /* null-terminated string */
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for (;;) {
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value = db_get_value(addr, 1, false);
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addr += 1;
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if (value == 0)
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break;
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if (value >= ' ' && value <= '~')
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db_printf("%c", (int)value);
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else
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db_printf("\\%03o", (int)value);
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}
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break;
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case 'S': /* symbol */
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value = db_get_value(addr, sizeof(void *),
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false);
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addr += sizeof(void *);
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db_printsym(value, DB_STGY_ANY);
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break;
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case 'i': /* instruction */
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addr = db_disasm(addr, false);
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break;
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case 'I': /* instruction, alternate form */
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addr = db_disasm(addr, true);
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break;
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default:
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break;
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}
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if (db_print_position() != 0)
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db_end_line(1);
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break;
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}
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}
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}
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db_next = addr;
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}
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/*
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* Print value.
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*/
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static char db_print_format = 'x';
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/*ARGSUSED*/
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void
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db_print_cmd(db_expr_t addr, bool have_addr, db_expr_t count, char *modif)
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{
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db_expr_t value;
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if (modif[0] != '\0')
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db_print_format = modif[0];
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switch (db_print_format) {
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case 'a':
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db_printsym((db_addr_t)addr, DB_STGY_ANY);
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break;
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case 'r':
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db_printf("%+11lr", (long)addr);
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break;
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case 'x':
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db_printf("%8lx", (unsigned long)addr);
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break;
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case 'z':
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db_printf("%8ly", (long)addr);
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break;
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case 'd':
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db_printf("%11ld", (long)addr);
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break;
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case 'u':
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db_printf("%11lu", (unsigned long)addr);
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break;
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case 'o':
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db_printf("%16lo", (unsigned long)addr);
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break;
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case 'c':
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value = addr & 0xFF;
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if (value >= ' ' && value <= '~')
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db_printf("%c", (int)value);
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else
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db_printf("\\%03o", (int)value);
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break;
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default:
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db_print_format = 'x';
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db_error("Syntax error: unsupported print modifier\n");
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/*NOTREACHED*/
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}
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db_printf("\n");
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}
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void
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db_print_loc_and_inst(db_addr_t loc)
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{
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db_expr_t off;
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db_printsym(loc, DB_STGY_PROC);
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if (db_search_symbol(loc, DB_STGY_PROC, &off) != C_DB_SYM_NULL) {
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db_printf(":\t");
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(void)db_disasm(loc, false);
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}
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}
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/*
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* Search for a value in memory.
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* Syntax: search [/bhl] addr value [mask] [,count]
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*/
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void
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db_search_cmd(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
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{
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int t;
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db_addr_t addr;
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int size;
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db_expr_t value;
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db_expr_t mask;
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db_expr_t count;
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t = db_read_token();
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if (t == tSLASH) {
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t = db_read_token();
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if (t != tIDENT) {
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bad_modifier:
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db_printf("Bad modifier\n");
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db_flush_lex();
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return;
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}
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if (!strcmp(db_tok_string, "b"))
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size = 1;
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else if (!strcmp(db_tok_string, "h"))
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size = 2;
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else if (!strcmp(db_tok_string, "l"))
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size = 4;
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else
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goto bad_modifier;
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} else {
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db_unread_token(t);
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size = 4;
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}
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if (!db_expression((db_expr_t *)&addr)) {
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db_printf("Address missing\n");
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db_flush_lex();
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return;
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}
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if (!db_expression(&value)) {
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db_printf("Value missing\n");
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db_flush_lex();
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return;
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}
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if (!db_expression(&mask))
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mask = 0xffffffffUL;
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t = db_read_token();
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if (t == tCOMMA) {
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if (!db_expression(&count)) {
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db_printf("Count missing\n");
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db_flush_lex();
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return;
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}
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} else {
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db_unread_token(t);
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count = -1; /* effectively forever */
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}
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db_skip_to_eol();
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db_search(addr, size, value, mask, count);
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}
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static void
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db_search(db_addr_t addr, int size, db_expr_t value, db_expr_t mask,
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unsigned int count)
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{
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while (count-- != 0) {
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db_prev = addr;
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if ((db_get_value(addr, size, false) & mask) == value)
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break;
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addr += size;
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}
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db_next = addr;
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}
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