diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c11a989
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,45 @@
+#******************************************************************************#
+#                                                                              #
+#                                                         :::      ::::::::    #
+#    Makefile                                           :+:      :+:    :+:    #
+#                                                     +:+ +:+         +:+      #
+#    By: vvaas <vvaas@student.42angouleme.fr>       +#+  +:+       +#+         #
+#                                                 +#+#+#+#+#+   +#+            #
+#    Created: 2024/03/15 14:16:21 by vvaas             #+#    #+#              #
+#    Updated: 2024/03/15 16:52:30 by vvaas            ###   ########.fr        #
+#                                                                              #
+#******************************************************************************#
+
+NAME = libasm.a
+
+SRCS = ft_strlen.s \
+		ft_write.s  \
+		ft_read.s    \
+		ft_strcpy.s   \
+		ft_strcmp.s    \
+		
+OBJS = ${SRCS:.s=.o}
+
+CC = nasm
+
+FLAGS = -f elf64
+
+AR = ar
+
+ARFLAG = rc
+
+.s.o :
+	${CC} $< -o ${<:.s=.o} ${FLAGS}
+
+all: ${NAME}
+
+${NAME}: ${OBJS}
+	${AR} ${ARFLAGS} ${NAME} ${OBJS}
+
+clean:
+	rm -f ${OBJS}
+
+fclean: clean
+	rm -f ${NAME}
+
+re:	fclean all
diff --git a/ft_read.s b/ft_read.s
new file mode 100644
index 0000000..6aed3c1
--- /dev/null
+++ b/ft_read.s
@@ -0,0 +1,17 @@
+global _read
+extern __errno_location
+
+_read:
+	mov eax, 0x11
+	syscall
+	test rax, rax
+	js .error
+	ret
+
+.error:
+	mov ebx, eax
+	call __errno_location wrt ..plt
+	neg ebx
+	mov dword [rax], ebx
+	mov rax, -1
+	ret
\ No newline at end of file
diff --git a/ft_strcmp.s b/ft_strcmp.s
new file mode 100644
index 0000000..bfc9dfa
--- /dev/null
+++ b/ft_strcmp.s
@@ -0,0 +1,16 @@
+extern _strcmp
+
+
+_strcmp:
+	xor rax, rax
+	xor rbx, rbx
+.count:
+	mov rax, [rdi + rbx]
+	sub rax, [rsi + rbx]
+	cmp rax, 0
+	jne .end
+	inc rbx
+	jmp .count
+
+.end: 
+	ret
diff --git a/ft_strcpy.s b/ft_strcpy.s
new file mode 100644
index 0000000..82dfb2f
--- /dev/null
+++ b/ft_strcpy.s
@@ -0,0 +1,16 @@
+extern _strcpy
+
+_strcpy:
+	xor rbx, rbx
+
+.cpy:
+	cmp dword [rsi + rbx], 0
+	je .end
+	mov rax, [rsi + rbx]
+	mov [rdi + rbx], rax
+	inc rbx
+	jmp .cpy
+
+.end:
+	mov rax, rdi
+	ret
diff --git a/ft_write.s b/ft_write.s
index 69f63d4..50a29db 100644
--- a/ft_write.s
+++ b/ft_write.s
@@ -1,10 +1,17 @@
 global _write
+extern __errno_location
 
 _write:
 	mov eax, 0x1
 	syscall
-	jc .error
+	test rax, rax
+	js .error
 	ret
+
 .error:
+	mov ebx, eax
+	call __errno_location wrt ..plt
+	neg ebx
+	mov dword [rax], ebx
 	mov rax, -1
 	ret
\ No newline at end of file
diff --git a/libasm.a b/libasm.a
new file mode 100644
index 0000000..39ce1eb
Binary files /dev/null and b/libasm.a differ
diff --git a/mauvaisdavid.txt b/mauvaisdavid.txt
new file mode 100644
index 0000000..a40e22c
--- /dev/null
+++ b/mauvaisdavid.txt
@@ -0,0 +1 @@
+mauvaisdavid
\ No newline at end of file