xref: /freebsd-11-stable/sys/arm64/arm64/db_disasm.c

/*-
 * Copyright (c) 2015 The FreeBSD Foundation
 * All rights reserved.
 *
 * This software was developed by Semihalf under
 * the sponsorship of the FreeBSD Foundation.
 *
 * 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.
 *
 * 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <ddb/ddb.h>
#include <ddb/db_access.h>
#include <ddb/db_sym.h>

#include <machine/disassem.h>

static u_int db_disasm_read_word(vm_offset_t);
static void db_disasm_printaddr(vm_offset_t);

/* Glue code to interface db_disasm to the generic ARM disassembler */
static const struct disasm_interface db_disasm_interface = {
	.di_readword = db_disasm_read_word,
	.di_printaddr = db_disasm_printaddr,
	.di_printf = db_printf,
};

static u_int
db_disasm_read_word(vm_offset_t address)
{

	return (db_get_value(address, INSN_SIZE, 0));
}

static void
db_disasm_printaddr(vm_offset_t address)
{

	db_printsym((db_addr_t)address, DB_STGY_ANY);
}

vm_offset_t
db_disasm(vm_offset_t loc, bool altfmt)
{

	return (disasm(&db_disasm_interface, loc, altfmt));
}

/* End of db_disasm.c */