diff --git a/include/Asm/arch.h b/include/Asm/arch.h
index 7cc8e7e..aa3f9a8 100644
--- a/include/Asm/arch.h
+++ b/include/Asm/arch.h
@@ -29,15 +29,16 @@ typedef struct _Arch Arch;
 
 typedef enum _ArchEndian
 {
-	ARCH_ENDIAN_BIG = 0,
-	ARCH_ENDIAN_LITTLE,
-	ARCH_ENDIAN_BOTH
+	ARCH_ENDIAN_BIG		= 0x1,
+	ARCH_ENDIAN_LITTLE	= 0x2,
+	ARCH_ENDIAN_BOTH	= 0x3
 } ArchEndian;
 
 typedef struct _ArchDescription
 {
-	char const * format;		/* default format */
+	char const * format;		/* default format plug-in */
 	ArchEndian endian;
+	uint32_t address_size;
 	uint32_t alignment;
 	uint32_t instruction_size;	/* 0 if not constant */
 } ArchDescription;
diff --git a/src/arch/amd64.c b/src/arch/amd64.c
index 480b1f7..d6b66e2 100644
--- a/src/arch/amd64.c
+++ b/src/arch/amd64.c
@@ -46,6 +46,11 @@ enum
 
 
 /* variables */
+static ArchDescription _amd64_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 64, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _amd64_registers[] =
 {
@@ -78,7 +83,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"amd64",
-	NULL,
+	&_amd64_description,
 	_amd64_registers,
 	_amd64_instructions,
 	NULL,
diff --git a/src/arch/arm.c b/src/arch/arm.c
index 99fd70d..0e0e1cc 100644
--- a/src/arch/arm.c
+++ b/src/arch/arm.c
@@ -33,7 +33,10 @@ enum
 
 
 /* variables */
-static ArchDescription _arm_description = { "elf", ARCH_ENDIAN_BIG, 32, 32 };
+static ArchDescription _arm_description =
+{
+	"elf", ARCH_ENDIAN_BOTH, 32, 32, 32
+};
 
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _arm_registers[] =
diff --git a/src/arch/dalvik.c b/src/arch/dalvik.c
index a5199ef..570640a 100644
--- a/src/arch/dalvik.c
+++ b/src/arch/dalvik.c
@@ -56,7 +56,9 @@ enum
 /* variables */
 /* plug-in */
 static ArchDescription _dalvik_description =
-{ "dex", ARCH_ENDIAN_LITTLE, 2, 0 };
+{
+	"dex", ARCH_ENDIAN_LITTLE, 32, 16, 0
+};
 
 
 #define REG(name, size, id) { "" # name, size, id },
diff --git a/src/arch/i386.c b/src/arch/i386.c
index 25887d2..d05cf52 100644
--- a/src/arch/i386.c
+++ b/src/arch/i386.c
@@ -43,6 +43,11 @@ enum
 
 
 /* variables */
+static ArchDescription _i386_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 32, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _i386_registers[] =
 {
@@ -70,7 +75,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"i386",
-	NULL,
+	&_i386_description,
 	_i386_registers,
 	_i386_instructions,
 	NULL,
diff --git a/src/arch/i386_real.c b/src/arch/i386_real.c
index 828df1a..2180d83 100644
--- a/src/arch/i386_real.c
+++ b/src/arch/i386_real.c
@@ -44,6 +44,11 @@ enum
 
 
 /* variables */
+static ArchDescription _i386_real_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 20, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _i386_real_registers[] =
 {
@@ -71,7 +76,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"i386_real",
-	NULL,
+	&_i386_real_description,
 	_i386_real_registers,
 	_i386_real_instructions,
 	NULL,
diff --git a/src/arch/i486.c b/src/arch/i486.c
index 9bad1f4..a07206c 100644
--- a/src/arch/i486.c
+++ b/src/arch/i486.c
@@ -43,6 +43,11 @@ enum
 
 
 /* variables */
+static ArchDescription _i486_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 32, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _i486_registers[] =
 {
@@ -71,7 +76,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"i486",
-	NULL,
+	&_i486_description,
 	_i486_registers,
 	_i486_instructions,
 	NULL,
diff --git a/src/arch/i586.c b/src/arch/i586.c
index 49bb474..a3434c7 100644
--- a/src/arch/i586.c
+++ b/src/arch/i586.c
@@ -43,6 +43,11 @@ enum
 
 
 /* variables */
+static ArchDescription _i586_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 32, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _i586_registers[] =
 {
@@ -72,7 +77,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"i586",
-	NULL,
+	&_i586_description,
 	_i586_registers,
 	_i586_instructions,
 	NULL,
diff --git a/src/arch/i686.c b/src/arch/i686.c
index 1aa00fd..4a234e4 100644
--- a/src/arch/i686.c
+++ b/src/arch/i686.c
@@ -44,6 +44,11 @@ enum
 
 
 /* variables */
+static ArchDescription _i686_description =
+{
+	"elf", ARCH_ENDIAN_LITTLE, 32, 8, 0
+};
+
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _i686_registers[] =
 {
@@ -74,7 +79,7 @@ ArchPlugin arch_plugin =
 {
 	NULL,
 	"i686",
-	NULL,
+	&_i686_description,
 	_i686_registers,
 	_i686_instructions,
 	NULL,
diff --git a/src/arch/java.c b/src/arch/java.c
index 6d06233..c2af640 100644
--- a/src/arch/java.c
+++ b/src/arch/java.c
@@ -25,7 +25,10 @@
 /* Java */
 /* private */
 /* variables */
-static ArchDescription _java_description = { "java", ARCH_ENDIAN_BIG, 1, 0 };
+static ArchDescription _java_description =
+{
+	"java", ARCH_ENDIAN_BIG, 32, 8, 0
+};
 
 static ArchRegister _java_registers[] =
 {
diff --git a/src/arch/mips.c b/src/arch/mips.c
index b61eed2..4ed41fe 100644
--- a/src/arch/mips.c
+++ b/src/arch/mips.c
@@ -22,7 +22,10 @@
 /* mips */
 /* private */
 /* variables */
-static ArchDescription _mips_description = { "elf", ARCH_ENDIAN_BIG, 32, 32 };
+static ArchDescription _mips_description =
+{
+	"elf", ARCH_ENDIAN_BOTH, 32, 32, 32
+};
 
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _mips_registers[] =
diff --git a/src/arch/sparc.c b/src/arch/sparc.c
index c856507..e524140 100644
--- a/src/arch/sparc.c
+++ b/src/arch/sparc.c
@@ -22,7 +22,10 @@
 /* sparc */
 /* private */
 /* variables */
-static ArchDescription _sparc_description = { "elf", ARCH_ENDIAN_BIG, 32, 32 };
+static ArchDescription _sparc_description =
+{
+	"elf", ARCH_ENDIAN_BIG, 32, 32, 32
+};
 
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _sparc_registers[] =
diff --git a/src/arch/sparc64.c b/src/arch/sparc64.c
index 7519fee..bbe96d1 100644
--- a/src/arch/sparc64.c
+++ b/src/arch/sparc64.c
@@ -23,7 +23,9 @@
 /* private */
 /* variables */
 static ArchDescription _sparc64_description =
-{ "elf", ARCH_ENDIAN_BIG, 32, 32 };
+{
+	"elf", ARCH_ENDIAN_BIG, 64, 32, 32
+};
 
 #define REG(name, size, id) { "" # name, size, id },
 static ArchRegister _sparc64_registers[] =