util.c

/*-
 * Copyright (c) 2018 The University of Oslo
 * Copyright (c) 2018 Dag-Erling Smørgrav
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <stddef.h>
#include <stdint.h>
#include <stdio.h>

#include "meltdown.h"

/*
 * Debugging
 */
int verbose;

/*
 * Print a pretty hex dump of the specified buffer.
 */
void
hexdump(size_t base, const void *bufp, size_t len)
{
	const uint8_t *buf = bufp;
	unsigned int i;
	ssize_t res;

	res = len;
	while (res > 0) {
		printf("%08zx ", base);
		for (i = 0; i < 16; ++i) {
			if (i == 8)
				printf(" :");
			if (i < res)
				printf(" %02x", buf[i]);
			else
				printf(" --");
		}
		printf(" |");
		for (i = 0; i < 16; ++i) {
			if (i == 8)
				printf(":");
			if (i < res)
				printf("%c", is_p(buf[i]) ? buf[i] : '.');
			else
				printf("-");
		}
		printf("|\n");
		res -= 16;
		buf += 16;
		base += 16;
	}
}