diff --git a/dnstoys.o b/dnstoys.o
index 8af284a..7833286 100644
Binary files a/dnstoys.o and b/dnstoys.o differ
diff --git a/examples/HWA/main b/examples/HWA/main
index 8fb7e1b..fb0303f 100644
Binary files a/examples/HWA/main and b/examples/HWA/main differ
diff --git a/examples/HWA/makefile b/examples/HWA/makefile
index 0adebfc..d6206ad 100644
--- a/examples/HWA/makefile
+++ b/examples/HWA/makefile
@@ -1,16 +1,13 @@
 all: main
 
-main: ../../std.o ../../string.o main.o
-	ld -m elf_i386 main.o ../../std.o ../../string.o --output main
+main: /lib/sbalib.so main.o
+	ld -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 main.o /lib/sbalib.so -o main
 
 main.o:
-	fasm main.asm
+	fasm main.asm > /dev/null
 
-../../std.o:
-	make -C ../../ std.o
-
-../../string.o:
-	make -C ../../ string.o
+/lib/sbalib.so:
+	make -C ../../
 
 clear:
 	rm main.o main
diff --git a/examples/file/main b/examples/file/main
index 30355a7..281125d 100644
Binary files a/examples/file/main and b/examples/file/main differ
diff --git a/examples/file/makefile b/examples/file/makefile
index 270ac57..d6206ad 100644
--- a/examples/file/makefile
+++ b/examples/file/makefile
@@ -1,22 +1,13 @@
 all: main
 
-main: ../../file.o ../../std.o ../../path.o ../../string.o main.o
-	ld -m elf_i386 main.o ../../file.o ../../std.o ../../path.o ../../string.o --output main
+main: /lib/sbalib.so main.o
+	ld -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 main.o /lib/sbalib.so -o main
 
 main.o:
-	fasm main.asm
+	fasm main.asm > /dev/null
 
-../../std.o:
-	make -C ../.. std.o
-
-../../file.o:
-	make -C ../.. file.o
-
-../../path.o:
-	make -C ../.. path.o
-
-../../string.o:
-	make -C ../.. string.o
+/lib/sbalib.so:
+	make -C ../../
 
 clear:
 	rm main.o main
diff --git a/examples/network/main b/examples/network/main
index 2ae5a2c..756bac4 100644
Binary files a/examples/network/main and b/examples/network/main differ
diff --git a/examples/network/makefile b/examples/network/makefile
index b73a1df..d6206ad 100644
--- a/examples/network/makefile
+++ b/examples/network/makefile
@@ -1,25 +1,13 @@
 all: main
 
-main: ../../std.o ../../string.o ../../network.o ../../dns.o ../../dnstoys.o main.o
-	ld -m elf_i386 main.o ../../std.o ../../string.o ../../network.o ../../dns.o  ../../dnstoys.o --output main
-	
+main: /lib/sbalib.so main.o
+	ld -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 main.o /lib/sbalib.so -o main
+
 main.o:
-	fasm main.asm
+	fasm main.asm > /dev/null
 
-../../std.o:
-	make -C ../.. std.o
+/lib/sbalib.so:
+	make -C ../../
 
-../../string.o:
-	make -C ../.. string.o
-
-../../network.o:
-	make -C ../.. network.o
-
-../../dns.o:
-	make -C ../.. dns.o
-
-../../dnstoys.o:
-	make -C ../.. dnstoys.o
-	
 clear:
 	rm main.o main
diff --git a/heap.o b/heap.o
new file mode 100644
index 0000000..55ec61f
Binary files /dev/null and b/heap.o differ
diff --git a/makefile b/makefile
index 3c124cb..34c6353 100644
--- a/makefile
+++ b/makefile
@@ -1,25 +1,9 @@
-all: std.o string.o file.o path.o network.o dns.o dnstoys.o
+all: $(patsubst src/%.asm,%.o, $(wildcard src/*))
+	ld -m elf_i386 -shared *.o -o sbalib.so
+	cp sbalib.so /lib/
 
-std.o:
-	fasm src/std.asm std.o
-
-string.o:
-	fasm src/string.asm string.o
-
-file.o:
-	fasm src/file.asm file.o
-
-path.o:
-	fasm src/path.asm path.o
-
-network.o:
-	fasm src/network.asm network.o
-
-dns.o:
-	fasm src/dns.asm dns.o
-
-dnstoys.o:
-	fasm src/dnstoys.asm dnstoys.o
+%.o:
+	fasm $(patsubst %.o,src/%.asm,$@) $@ 		> /dev/null
 
 clear:
-	rm *.o
+	rm *.o sbalib.so
\ No newline at end of file
diff --git a/network.o b/network.o
index 435a59d..b6e6019 100644
Binary files a/network.o and b/network.o differ
diff --git a/sbalib.so b/sbalib.so
new file mode 100644
index 0000000..79d1df9
Binary files /dev/null and b/sbalib.so differ
diff --git a/src/dnstoys.asm b/src/dnstoys.asm
index 74e1220..1f330fb 100644
--- a/src/dnstoys.asm
+++ b/src/dnstoys.asm
@@ -27,7 +27,6 @@ myip:
 	push dnstoys
 	call network.get_ip
 	pop eax
-	mov eax, [eax]
 	mov [DNS_server+4], eax
 
 	push dword 200
diff --git a/src/heap.asm b/src/heap.asm
new file mode 100644
index 0000000..e4298ee
--- /dev/null
+++ b/src/heap.asm
@@ -0,0 +1,98 @@
+format ELF
+public _add as 'heap.add'
+public del  as 'heap.del'
+
+include '../include/macros.inc'
+extrn exit
+
+section '.bss' writeable
+_heap:
+    db 0xB  ; flag
+    dd 4    ; size
+    dd 4096 ; available memory
+    
+    rd 4096
+
+section '.text' executable
+_add:
+    prelude
+
+    mov ecx, [ebp+2*4]  ; size
+    mov eax, _heap
+    xor edx, edx
+
+    .loop:
+        cmp [eax], byte 0
+        je .empty
+
+        mov bl, [eax]
+        bt  bx, 0
+        jc .busy
+
+        inc eax
+        cmp edx, 0
+        jne @f
+            mov edx, eax
+        @@:
+        cmp ecx, [eax]
+        jl .more
+        je .equal
+        ; less
+            sub ecx, [eax]
+            add eax, [eax]
+            add eax, 4
+            jmp .loop
+        .equal:
+            mov [edx], byte 9
+            mov ebx, [ebp+2*4]
+            mov [edx+1], ebx
+            add edx, 5
+            mov [ebp+2*4], edx
+            postlude
+            ret
+        .more:
+            mov ebx, edx
+            add ebx, [ebp+2*4]
+            mov [ebx], byte 9
+            inc ebx
+            mov eax, [eax]
+            sub eax, ecx
+            mov [ebx], eax
+            
+            add ebx, [ebp+2*4]
+            mov [edx-1], byte 9
+            mov edx, ebx
+
+            add edx, 5
+            mov [ebp+2*4], edx
+            postlude
+            ret
+        
+        .empty:
+            cmp edx, 0
+            jne @f
+                mov edx, eax
+            @@:
+            je @f
+                dec edx
+            @@:
+            jmp .equal
+
+        .busy:
+        xor edx, edx
+        inc eax
+        add eax, [eax]
+        add eax, 4
+
+        jmp .loop
+
+del:
+    push eax
+    mov eax, [esp+4*2]
+    sub eax, 5
+    and byte [eax], 254
+    mov eax, [esp+4]
+    mov [esp+4*2], eax
+    pop eax
+    add esp, 4
+    ret
diff --git a/src/network.asm b/src/network.asm
index fe78f61..25f063e 100644
--- a/src/network.asm
+++ b/src/network.asm
@@ -26,15 +26,7 @@ get_ip:
 	push dword 0
 	call dns.get_field
 	pop eax
-	push eax
-	call string.len
-	pop ebx
-	add eax, ebx  
-	cmp ebx, 2
-	je @f
-		inc eax
-	@@:
-	add eax, 2*3+4
+	mov eax, [eax]
 	
 	mov [ebp+2*4], eax
 	postlude
diff --git a/src/std.asm b/src/std.asm
index 08ccb0c..17fa64d 100644
--- a/src/std.asm
+++ b/src/std.asm
@@ -69,6 +69,7 @@ _bin:
 
 	push 2
 	mov ebx, 2
+	xor edx, edx
 
 	@@:
 		cmp eax, 2
diff --git a/src/string.asm b/src/string.asm
index 4650bc5..01accff 100644
--- a/src/string.asm
+++ b/src/string.asm
@@ -2,8 +2,10 @@ format ELF
 public copy 		as 'string.copy'
 public len  		as 'string.len'
 public parse_int	as 'string.parse_int'
+public concat		as 'string.concat'
 
 include "../include/macros.inc"
+extrn heap.add
 
 section '.string.text' executable
 copy:
@@ -82,3 +84,34 @@ parse_int:
 		mov [ebp+4*2], eax
 		postlude
 		ret
+
+concat:
+	prelude 
+
+	push dword [ebp+3*4]
+	call len
+	push dword [ebp+2*4]
+	call len
+	mov eax, [esp+4]
+	add [esp], eax
+	dec dword [esp]
+	call heap.add
+	pop eax
+	mov edx, eax
+	
+	push dword [ebp+3*4]
+	push eax
+	call copy
+
+	add eax, [esp]
+	mov ebx, [ebp+2*4]
+	mov [esp], ebx
+	push eax
+	call copy
+
+	mov eax, [ebp+4]
+	mov [ebp+2*4], eax
+	mov [ebp+3*4], edx
+	postlude
+	add esp, 4
+	ret
\ No newline at end of file
diff --git a/std.o b/std.o
index 069204b..e4d6f58 100644
Binary files a/std.o and b/std.o differ
diff --git a/string.o b/string.o
index d611758..fa8cd2d 100644
Binary files a/string.o and b/string.o differ