diff --git a/Makefile b/Makefile
index edfddc1..95113ad 100644
--- a/Makefile
+++ b/Makefile
@@ -40,6 +40,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/parser.c \
 		$(PACKAGE)-$(VERSION)/src/token.c \
 		$(PACKAGE)-$(VERSION)/src/main.c \
+		$(PACKAGE)-$(VERSION)/src/deasm.c \
 		$(PACKAGE)-$(VERSION)/src/Makefile \
 		$(PACKAGE)-$(VERSION)/src/arch.h \
 		$(PACKAGE)-$(VERSION)/src/asm.h \
diff --git a/include/Asm/arch.h b/include/Asm/arch.h
index 1e52e2f..5d8115e 100644
--- a/include/Asm/arch.h
+++ b/include/Asm/arch.h
@@ -179,6 +179,8 @@ typedef struct _ArchPluginHelper
 	/* callbacks */
 	/* accessors */
 	char const * (*get_filename)(Arch * arch);
+	ArchInstruction * (*get_instruction_by_opcode)(Arch * arch,
+			uint8_t size, uint32_t opcode);
 	ArchRegister * (*get_register_by_name_size)(Arch * arch,
 			char const * name, uint32_t size);
 
diff --git a/src/.cvsignore b/src/.cvsignore
index 038879a..2312efe 100644
--- a/src/.cvsignore
+++ b/src/.cvsignore
@@ -1,2 +1,3 @@
 .cvsignore
 asm
+deasm
diff --git a/src/Makefile b/src/Makefile
index 5ab1c7a..16e12e0 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,5 +1,5 @@
 SUBDIRS	= arch format
-TARGETS	= libasm.a libasm.so asm
+TARGETS	= libasm.a libasm.so asm deasm
 PREFIX	= /usr/local
 DESTDIR	= 
 LIBDIR	= $(PREFIX)/lib
@@ -42,6 +42,13 @@ asm_LDFLAGS = $(LDFLAGSF) $(LDFLAGS) -L. -Wl,-rpath,$(LIBDIR) -lasm
 asm: $(asm_OBJS) libasm.so
 	$(CC) -o asm $(asm_OBJS) $(asm_LDFLAGS)
 
+deasm_OBJS = deasm.o
+deasm_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
+deasm_LDFLAGS = $(LDFLAGSF) $(LDFLAGS) -L. -Wl,-rpath,$(LIBDIR) -lasm
+
+deasm: $(deasm_OBJS) libasm.so
+	$(CC) -o deasm $(deasm_OBJS) $(deasm_LDFLAGS)
+
 arch.o: arch.c arch.h ../config.h
 	$(CC) $(libasm_CFLAGS) -c arch.c
 
@@ -63,13 +70,16 @@ token.o: token.c token.h
 main.o: main.c ../include/Asm.h
 	$(CC) $(asm_CFLAGS) -c main.c
 
+deasm.o: deasm.c ../include/Asm.h
+	$(CC) $(deasm_CFLAGS) -c deasm.c
+
 clean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) || exit; done
-	$(RM) -- $(libasm_OBJS) $(asm_OBJS)
+	$(RM) -- $(libasm_OBJS) $(asm_OBJS) $(deasm_OBJS)
 
 distclean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean) || exit; done
-	$(RM) -- $(libasm_OBJS) $(asm_OBJS)
+	$(RM) -- $(libasm_OBJS) $(asm_OBJS) $(deasm_OBJS)
 	$(RM) -- $(TARGETS)
 
 install: $(TARGETS)
@@ -81,6 +91,8 @@ install: $(TARGETS)
 	$(LN) -s -- libasm.so.0.0 $(DESTDIR)$(LIBDIR)/libasm.so
 	$(MKDIR) $(DESTDIR)$(BINDIR)
 	$(INSTALL) -m 0755 -- asm $(DESTDIR)$(BINDIR)/asm
+	$(MKDIR) $(DESTDIR)$(BINDIR)
+	$(INSTALL) -m 0755 -- deasm $(DESTDIR)$(BINDIR)/deasm
 
 uninstall:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) uninstall) || exit; done
@@ -89,5 +101,6 @@ uninstall:
 	$(RM) -- $(DESTDIR)$(LIBDIR)/libasm.so.0
 	$(RM) -- $(DESTDIR)$(LIBDIR)/libasm.so
 	$(RM) -- $(DESTDIR)$(BINDIR)/asm
+	$(RM) -- $(DESTDIR)$(BINDIR)/deasm
 
 .PHONY: all subdirs clean distclean install uninstall
diff --git a/src/arch.c b/src/arch.c
index c357725..17d8f4a 100644
--- a/src/arch.c
+++ b/src/arch.c
@@ -172,7 +172,7 @@ ArchInstruction * arch_get_instruction_by_opcode(Arch * arch, uint8_t size,
 	for(i = 0; i < arch->instructions_cnt; i++)
 	{
 		ai = &arch->plugin->instructions[i];
-		if(AO_GET_SIZE(ai->opcode) != size)
+		if(AO_GET_SIZE(ai->flags) != size)
 			continue;
 		if(ai->opcode == opcode)
 			return ai;
@@ -457,6 +457,9 @@ static void _decode_print(ArchInstructionCall * call)
 /* arch_exit */
 int arch_exit(Arch * arch)
 {
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s()\n", __func__);
+#endif
 	arch->filename = NULL;
 	arch->fp = NULL;
 	arch->buffer = NULL;
@@ -478,6 +481,7 @@ int arch_init(Arch * arch, char const * filename, FILE * fp)
 	arch->fp = fp;
 	arch->helper.arch = arch;
 	arch->helper.get_filename = _arch_get_filename;
+	arch->helper.get_instruction_by_opcode = arch_get_instruction_by_opcode;
 	arch->helper.get_register_by_name_size = arch_get_register_by_name_size;
 	arch->helper.read = NULL;
 	arch->helper.write = _arch_write;
@@ -498,6 +502,7 @@ int arch_init_buffer(Arch * arch, char const * buffer, size_t size)
 	arch->buffer_pos = 0;
 	arch->helper.arch = arch;
 	arch->helper.get_filename = _arch_get_filename;
+	arch->helper.get_instruction_by_opcode = arch_get_instruction_by_opcode;
 	arch->helper.get_register_by_name_size = arch_get_register_by_name_size;
 	arch->helper.write = NULL;
 	arch->helper.read = _arch_read_buffer;
@@ -531,6 +536,11 @@ static ssize_t _arch_read_buffer(Arch * arch, void * buf, size_t size)
 {
 	ssize_t s = min(arch->buffer_cnt - arch->buffer_pos, size);
 
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s()\n", __func__);
+#endif
+	if(s == 0)
+		return -error_set_code(1, "%s", "End of buffer reached");
 	memcpy(buf, &arch->buffer[arch->buffer_pos], s);
 	arch->buffer_pos += s;
 	return s;
diff --git a/src/arch/amd64.c b/src/arch/amd64.c
index 5381525..c87dbd6 100644
--- a/src/arch/amd64.c
+++ b/src/arch/amd64.c
@@ -80,5 +80,5 @@ ArchPlugin arch_plugin =
 	_amd64_registers,
 	_amd64_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/arch/i386.c b/src/arch/i386.c
index f7469b6..55492a1 100644
--- a/src/arch/i386.c
+++ b/src/arch/i386.c
@@ -74,5 +74,5 @@ ArchPlugin arch_plugin =
 	_i386_registers,
 	_i386_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/arch/i386.h b/src/arch/i386.h
index ba137a5..09e2f84 100644
--- a/src/arch/i386.h
+++ b/src/arch/i386.h
@@ -23,11 +23,33 @@
 /* i386 */
 /* private */
 /* prototypes */
+static int _i386_decode(ArchPlugin * plugin, ArchInstructionCall * call);
 static int _i386_write(ArchPlugin * plugin, ArchInstruction * instruction,
 		ArchInstructionCall * call);
 
 
 /* functions */
+/* i386_decode */
+static int _i386_decode(ArchPlugin * plugin, ArchInstructionCall * call)
+{
+	ArchPluginHelper * helper = plugin->helper;
+	ArchInstruction * ai = NULL;
+	uint8_t opcode;
+
+	/* FIXME really implement */
+	if(helper->read(helper->arch, &opcode, sizeof(opcode))
+			!= sizeof(opcode))
+		return -1;
+	if((ai = helper->get_instruction_by_opcode(helper->arch, 8, opcode))
+			== NULL)
+		/* FIXME return "db" instead */
+		return -1;
+	call->name = ai->name;
+	return 0;
+}
+
+
+/* i386_write */
 static int _write_constant(ArchPlugin * plugin,
 		ArchOperandDefinition definition, ArchOperand * operand);
 static int _write_dregister(ArchPlugin * plugin, uint32_t * i,
diff --git a/src/arch/i386_real.c b/src/arch/i386_real.c
index 5c8088e..e486319 100644
--- a/src/arch/i386_real.c
+++ b/src/arch/i386_real.c
@@ -75,5 +75,5 @@ ArchPlugin arch_plugin =
 	_i386_real_registers,
 	_i386_real_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/arch/i486.c b/src/arch/i486.c
index 3b530d7..e2b58aa 100644
--- a/src/arch/i486.c
+++ b/src/arch/i486.c
@@ -75,5 +75,5 @@ ArchPlugin arch_plugin =
 	_i486_registers,
 	_i486_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/arch/i586.c b/src/arch/i586.c
index d4b8667..09a766c 100644
--- a/src/arch/i586.c
+++ b/src/arch/i586.c
@@ -76,5 +76,5 @@ ArchPlugin arch_plugin =
 	_i586_registers,
 	_i586_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/arch/i686.c b/src/arch/i686.c
index 9f7d4a2..f8e86d6 100644
--- a/src/arch/i686.c
+++ b/src/arch/i686.c
@@ -78,5 +78,5 @@ ArchPlugin arch_plugin =
 	_i686_registers,
 	_i686_instructions,
 	_i386_write,
-	NULL
+	_i386_decode
 };
diff --git a/src/asm.c b/src/asm.c
index 8fcd393..d906cde 100644
--- a/src/asm.c
+++ b/src/asm.c
@@ -89,7 +89,6 @@ As * as_new(char const * arch, char const * format)
 {
 	As * as;
 
-	/* FIXME add signatures to the format plug-in (for disas too) */
 	if((as = object_new(sizeof(*as))) == NULL)
 		return NULL;
 	if(arch == NULL)
diff --git a/src/deasm.c b/src/deasm.c
new file mode 100644
index 0000000..8c29a22
--- /dev/null
+++ b/src/deasm.c
@@ -0,0 +1,547 @@
+/* $Id$ */
+/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Devel asm */
+/* This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+
+
+#include <System.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include "Asm.h"
+#include "../config.h"
+
+
+/* constants */
+#ifndef PREFIX
+# define PREFIX		"/usr/local"
+#endif
+#ifndef LIBDIR
+# define LIBDIR		PREFIX "/lib"
+#endif
+
+
+/* macros */
+#define max(a, b)	((a) > (b) ? (a) : (b))
+
+
+/* deasm */
+/* private */
+/* types */
+typedef struct _DeasmFormat
+{
+	Plugin * plugin;
+	FormatPlugin * format;
+} DeasmFormat;
+
+/* XXX ugly */
+#define _Deasm _Format
+typedef struct _Deasm
+{
+	char const * arch;
+	As * as;
+
+	FormatPluginHelper helper;
+	DeasmFormat * format;
+	size_t format_cnt;
+
+	char const * filename;
+	FILE * fp;
+} Deasm;
+
+
+/* prototypes */
+static int _deasm(char const * arch, char const * format,
+		char const * filename);
+static int _deasm_buffer(char const * arch, char const * format,
+		char const * buffer, size_t size);
+static int _deasm_error(char const * message, int ret);
+static int _deasm_string(char const * arch, char const * format,
+		char const * string);
+static int _deasm_list(void);
+
+/* helper */
+static int _deasm_helper_decode(Format * format, char const * section,
+		off_t offset, size_t size, off_t base);
+static ssize_t _deasm_helper_read(Format * format, void * buf, size_t size);
+static off_t _deasm_helper_seek(Format * format, off_t offset, int whence);
+
+/* format */
+static DeasmFormat const * _deasm_format_open(Deasm * deasm,
+		char const * format);
+static int _deasm_format_open_all(Deasm * deasm);
+static char const * _deasm_format_detect(DeasmFormat const * format);
+static void _deasm_format_close(DeasmFormat const * format);
+static void _deasm_format_close_all(Deasm * deasm);
+
+static int _usage(void);
+
+
+/* functions */
+/* deasm */
+static int _deasm_do_format(Deasm * deasm, char const * format);
+static int _deasm_do(Deasm * deasm);
+static int _deasm_do_callback(Deasm * deasm, FormatPlugin * format);
+#if 0
+static int _deasm_format_decode(Format * format, char const * section,
+		off_t offset, size_t size, off_t base);
+#endif
+
+static int _deasm(char const * arch, char const * format,
+		char const * filename)
+{
+	int ret = 1;
+	Deasm deasm;
+
+	deasm.arch = arch;
+	deasm.as = NULL;
+	deasm.helper.format = &deasm;
+	deasm.helper.read = _deasm_helper_read;
+	deasm.helper.seek = _deasm_helper_seek;
+	deasm.helper.write = NULL;
+	deasm.helper.decode = _deasm_helper_decode;
+	deasm.format = NULL;
+	deasm.format_cnt = 0;
+	if((deasm.fp = fopen(filename, "r")) == NULL)
+		return -_deasm_error(filename, 1);
+	deasm.filename = filename;
+	if(format != NULL)
+		ret = _deasm_do_format(&deasm, format);
+	else
+		ret = _deasm_do(&deasm);
+	if(deasm.as != NULL)
+		as_delete(deasm.as);
+	fclose(deasm.fp);
+	_deasm_format_close_all(&deasm);
+	if(ret != 0)
+		error_print("deasm");
+	return ret;
+}
+
+static int _deasm_do_format(Deasm * deasm, char const * format)
+{
+	int ret;
+	size_t i;
+	DeasmFormat const * df;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(\"%s\")\n", __func__, format);
+#endif
+	/* check if the plug-in is already opened */
+	for(i = 0; i < deasm->format_cnt; i++)
+		if(strcmp(deasm->format[i].format->name, format) == 0)
+			break;
+	if(i < deasm->format_cnt)
+		df = &deasm->format[i];
+	else if((df = _deasm_format_open(deasm, format)) == NULL)
+		return -1;
+	/* disassemble */
+	ret = _deasm_do_callback(deasm, df->format);
+	return ret;
+}
+
+static int _deasm_do(Deasm * deasm)
+{
+	int ret = 1;
+	size_t i;
+	size_t s = 0;
+	char * buf;
+	FormatPlugin * format;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s()\n", __func__);
+#endif
+	_deasm_format_open_all(deasm);
+	for(i = 0; i < deasm->format_cnt; i++)
+		s = max(s, deasm->format[i].format->signature_len);
+	if((buf = malloc(s)) == NULL)
+		return -_deasm_error(deasm->filename, 1);
+	if(fread(buf, 1, s, deasm->fp) != s)
+	{
+		if(ferror(deasm->fp))
+			ret = -_deasm_error(deasm->filename, 1);
+		else
+			ret = _deasm_do_format(deasm, "flat");
+	}
+	else
+	{
+		for(i = 0; i < deasm->format_cnt; i++)
+		{
+			format = deasm->format[i].format;
+			if(format->signature_len == 0)
+				continue;
+			if(memcmp(format->signature, buf, format->signature_len)
+					!= 0)
+				continue;
+			if(deasm->arch == NULL)
+				deasm->arch = _deasm_format_detect(
+						&deasm->format[i]);
+			if(deasm->arch == NULL)
+				continue;
+			ret = _deasm_do_callback(deasm, format);
+			break;
+		}
+		if(i == deasm->format_cnt)
+			ret = _deasm_do_format(deasm, "flat");
+	}
+	free(buf);
+	return ret;
+}
+
+static int _deasm_do_callback(Deasm * deasm, FormatPlugin * format)
+{
+	int ret;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(\"%s\")\n", __func__, format->name);
+#endif
+	if(deasm->arch == NULL)
+	{
+		if(format->detect == NULL)
+			return -error_set_code(1, "%s: %s", format->name,
+					"Unable to detect the architecture");
+		if((deasm->arch = format->detect(format)) == NULL)
+			return -1;
+	}
+	if((deasm->as = as_new(deasm->arch, format->name)) == NULL)
+		return -error_print("deasm");
+	printf("\n%s: %s-%s\n", deasm->filename, format->name,
+			as_get_arch_name(deasm->as));
+	ret = format->decode(format);
+	return ret;
+}
+
+
+/* deasm_buffer */
+static int _deasm_buffer(char const * arch, char const * format,
+		char const * buffer, size_t size)
+{
+	As * as;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s()\n", __func__);
+#endif
+	if((as = as_new(arch, format)) == NULL)
+		return -1;
+	if(as_decode(as, buffer, size) != 0)
+		error_print("deasm");
+	as_delete(as);
+	return 0;
+}
+
+
+/* deasm_error */
+static int _deasm_error(char const * message, int ret)
+{
+	fputs("deasm: ", stderr);
+	perror(message);
+	return ret;
+}
+
+
+/* deasm_string */
+static int _string_hex2bin(int c);
+static int _string_ishex(int c);
+
+static int _deasm_string(char const * arch, char const * format,
+		char const * string)
+{
+	int ret;
+	unsigned char * str = (unsigned char *)string;
+	size_t len = strlen(string);
+	char * s;
+	size_t i;
+	size_t j;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(\"%s\", \"%s\", \"%s\")\n", __func__, arch,
+			format, string);
+#endif
+	if((s = malloc(len + 1)) == NULL)
+		return -error_set_print("deasm", 1, "%s", strerror(errno));
+	for(i = 0, j = 0; i < len; i++)
+	{
+		if(str[i] != '\\')
+			s[j++] = str[i];
+		else if(str[i + 1] != 'x') /* "\\" */
+			s[j++] = str[++i];
+		else if(i + 3 < len && _string_ishex(str[i + 2])
+				&& _string_ishex(str[i + 3])) /* "\xHH" */
+		{
+			s[j++] = (_string_hex2bin(str[i + 2]) << 4)
+				| _string_hex2bin(str[i + 3]);
+			i += 3;
+		}
+	}
+	s[j] = '\0'; /* not really necessary */
+	ret = _deasm_buffer(arch, format, s, j);
+	free(s);
+	return ret;
+}
+
+static int _string_hex2bin(int c)
+{
+	if(c >= '0' && c <= '9')
+		return c - '0';
+	if(c >= 'a' && c <= 'f')
+		return c - 'a' + 10;
+	if(c >= 'A' && c <= 'F')
+		return c - 'A' + 10;
+	return -1;
+}
+
+static int _string_ishex(int c)
+{
+	return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')
+		|| (c >= 'A' || c <= 'F');
+}
+
+
+/* deasm_list */
+static int _deasm_list(void)
+{
+	Deasm deasm;
+	size_t i;
+	char const * sep = "";
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s()\n", __func__);
+#endif
+	memset(&deasm, 0, sizeof(deasm));
+	as_plugin_list(ASPT_ARCH);
+	_deasm_format_open_all(&deasm);
+	fputs("\nAvailable format plug-ins:\n", stderr);
+	for(i = 0; i < deasm.format_cnt; i++)
+	{
+		if(deasm.format[i].format->decode == NULL)
+			continue;
+		fprintf(stderr, "%s%s", sep, deasm.format[i].format->name);
+		sep = ", ";
+	}
+	fputc('\n', stderr);
+	_deasm_format_close_all(&deasm);
+	return 0;
+}
+
+
+
+/* helper */
+/* deasm_helper_decode */
+static int _deasm_helper_decode(Format * format, char const * section,
+		off_t offset, size_t size, off_t base)
+{
+	if(section != NULL)
+		printf("\n%s%s:\n", "Disassembly of section ", section);
+	if(fseek(format->fp, offset, SEEK_SET) != 0)
+		return -error_set_code(1, "%s: %s", format->filename,
+				strerror(errno));
+	printf("\n%08lx:\n", (unsigned long)offset + base);
+	/* FIXME implement */
+	if(fseek(format->fp, offset + size, SEEK_SET) != 0)
+		return -error_set_code(1, "%s: %s", format->filename,
+				strerror(errno));
+	return 0;
+}
+
+
+/* deasm_helper_read */
+static ssize_t _deasm_helper_read(Format * format, void * buf, size_t size)
+{
+	if(fread(buf, size, 1, format->fp) == 1)
+		return size;
+	return -error_set_code(1, "%s: %s", format->filename, strerror(errno));
+}
+
+
+/* deasm_helper_seek */
+static off_t _deasm_helper_seek(Format * format, off_t offset, int whence)
+{
+	if(fseek(format->fp, offset, whence) != 0)
+		return -error_set_code(1, "%s: %s", format->filename,
+				strerror(errno));;
+	return ftello(format->fp);
+}
+
+
+/* format */
+/* deasm_format_open */
+static DeasmFormat const * _deasm_format_open(Deasm * deasm,
+		char const * format)
+{
+	DeasmFormat * p;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(\"%s\")\n", __func__, format);
+#endif
+	if((p = realloc(deasm->format, sizeof(*p) * (deasm->format_cnt + 1)))
+			== NULL)
+	{
+		error_set_code(1, "%s", strerror(errno));
+		return NULL;
+	}
+	deasm->format = p;
+	p = &deasm->format[deasm->format_cnt];
+	if((p->plugin = plugin_new(LIBDIR, PACKAGE, "format", format)) == NULL)
+		return NULL;
+	if((p->format = plugin_lookup(p->plugin, "format_plugin")) == NULL)
+	{
+		plugin_delete(p->plugin);
+		return NULL;
+	}
+	if(p->format->decode == NULL)
+	{
+		error_set_code(1, "%s: %s", format,
+				"Does not support disassembly");
+		plugin_delete(p->plugin);
+		return NULL;
+	}
+	p->format->helper = &deasm->helper;
+	deasm->format_cnt++;
+	return p;
+}
+
+
+/* deasm_format_open_all */
+static int _deasm_format_open_all(Deasm * deasm)
+{
+	char const path[] = LIBDIR "/" PACKAGE "/format";
+	DIR * dir;
+	struct dirent * de;
+	size_t len;
+	char const ext[] = ".so";
+
+	if((dir = opendir(path)) == NULL)
+		return -error_set_print("deasm", 1, "%s: %s", path, strerror(
+					errno));
+	while((de = readdir(dir)) != NULL)
+	{
+		if((len = strlen(de->d_name)) < 4)
+			continue;
+		if(strcmp(&de->d_name[len - sizeof(ext) + 1], ext) != 0)
+			continue;
+		de->d_name[len - sizeof(ext) + 1] = '\0';
+		if(_deasm_format_open(deasm, de->d_name) == NULL)
+			error_print("deasm");
+	}
+	closedir(dir);
+	return 0;
+}
+
+
+#if 0
+/* deasm_format_callback */
+static int _callback_flat(Deasm * deasm, off_t offset, size_t size, off_t base);
+
+static int _deasm_format_decode(Format * format, char const * section,
+		off_t offset, size_t size, off_t base)
+{
+	Deasm * deasm = format;
+
+	if(section != NULL)
+		printf("\n%s%s\n", "Disassembly of section: ", section);
+	return _callback_flat(deasm, offset, size, base);
+}
+
+static int _callback_flat(Deasm * deasm, off_t offset, size_t size, off_t base)
+{
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(0x%lx, 0x%lx, 0x%lx)\n", __func__, offset,
+			size, base);
+#endif
+	if(fseek(deasm->fp, offset, SEEK_SET) != 0)
+		return -_deasm_error(deasm->filename, 1);
+	printf("\n%08lx:\n", offset + base);
+	return 0;
+}
+#endif
+
+
+/* deasm_format_detect */
+static char const * _deasm_format_detect(DeasmFormat const * format)
+{
+	if(format->format->detect == NULL)
+		return NULL;
+	return format->format->detect(format->format);
+}
+
+
+/* deasm_format_close */
+static void _deasm_format_close(DeasmFormat const * format)
+{
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s() \"%s\"\n", __func__, format->format->name);
+#endif
+	plugin_delete(format->plugin);
+}
+
+
+/* deasm_format_close_all */
+static void _deasm_format_close_all(Deasm * deasm)
+{
+	size_t i;
+
+	for(i = 0; i < deasm->format_cnt; i++)
+		_deasm_format_close(&deasm->format[i]);
+	free(deasm->format);
+	deasm->format = NULL;
+	deasm->format_cnt = 0;
+}
+
+
+/* usage */
+static int _usage(void)
+{
+	fputs("Usage: deasm [-a arch][-f format] filename\n"
+"       deasm [-a arch][-f format] -s string\n"
+"       deasm -l\n", stderr);
+	return 1;
+}
+
+
+/* public */
+/* functions */
+/* main */
+int main(int argc, char * argv[])
+{
+	int o;
+	char const * arch = NULL;
+	char const * format = NULL;
+	char const * string = NULL;
+
+	while((o = getopt(argc, argv, "a:f:ls:")) != -1)
+		switch(o)
+		{
+			case 'a':
+				arch = optarg;
+				break;
+			case 'f':
+				format = optarg;
+				break;
+			case 'l':
+				return _deasm_list();
+			case 's':
+				string = optarg;
+				break;
+			default:
+				return _usage();
+		}
+	if(optind == argc && string != NULL)
+		return _deasm_string(arch, format, string);
+	else if(optind + 1 == argc && string == NULL)
+		return (_deasm(arch, format, argv[optind]) == 0) ? 0 : 2;
+	return _usage();
+}
diff --git a/src/project.conf b/src/project.conf
index 9c95050..d747363 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -1,5 +1,5 @@
 subdirs=arch,format
-targets=libasm,asm
+targets=libasm,asm,deasm
 cppflags_force=-I ../include
 cppflags=
 cflags_force=-W `pkg-config --cflags cpp`
@@ -21,6 +21,13 @@ depends=libasm.so
 ldflags=-L. -Wl,-rpath,$(LIBDIR) -lasm
 install=$(BINDIR)
 
+[deasm]
+type=binary
+sources=deasm.c
+depends=libasm.so
+ldflags=-L. -Wl,-rpath,$(LIBDIR) -lasm
+install=$(BINDIR)
+
 [arch.c]
 depends=arch.h,../config.h
 
@@ -30,6 +37,9 @@ depends=../include/Asm.h,code.h,parser.h,asm.h,../config.h
 [code.c]
 depends=../include/Asm.h,arch.h,code.h
 
+[deasm.c]
+depends=../include/Asm.h
+
 [format.c]
 depends=format.h,../config.h