v1.0

Makefile

@@ -0,0 +1,49 @@
+NAME		=	libasm.so
+
+SRC_DIR		=	./src
+
+SRC_EXT		=	S
+
+SRCS		=	src/memmove.S	\
+			src/strstr.S	\
+			src/strncmp.S	\
+			src/strlen.S	\
+			src/strcspn.S	\
+			src/strcmp.S	\
+			src/memset.S	\
+			src/strcasecmp.S	\
+			src/memcpy.S	\
+			src/strchr.S	\
+			src/strpbrk.S	\
+			src/rindex.S	\
+			src/strcpy.S	\
+			src/strnlen.S	\
+			src/strrchr.S	\
+			src/bzero.S
+
+
+OBJS		=	$(SRCS:.$(SRC_EXT)=.o)
+
+RM		=	-rm -rf
+
+CC		=	gcc
+
+CFLAGS		=	-f macho64
+
+all		:	$(NAME)
+
+$(NAME)		:	$(OBJS)
+			$(CC) -o $(NAME) -shared $(OBJS)
+
+%.o		:	%.S
+			nasm $(CFLAGS) -o $@ $< 
+
+clean		:
+			$(RM) $(OBJS)
+
+fclean		:	clean
+			$(RM) $(NAME)
+
+re		:	fclean all
+
+.PHONY		:	fclean clean all re

src/bzero.S

@@ -0,0 +1,19 @@
+[BITS 64]
+	global bzero
+
+	section .text
+
+bzero:	push rbp		;; prologue
+	mov rbp, rsp
+
+	dec rsi
+loop:	cmp rsi, -1
+	je end
+	mov byte[rdi + rsi], 0
+	dec rsi
+	jmp loop
+
+end:	mov rsp, rbp		;; epilogue
+	pop rbp
+	ret
+

src/memcpy.S

@@ -0,0 +1,22 @@
+[BITS 64]
+	global memcpy
+
+	section .text
+
+memcpy:	push rbp		;; prologue
+	mov rbp, rsp
+
+	xor rcx, rcx
+loop:	cmp rdx, 0
+	jz end
+	mov al, [rsi + rcx]
+	mov [rdi + rcx], al
+	inc rcx
+	dec rdx
+	jmp loop
+
+end:	mov rax,rdi
+	mov rsp, rbp		;; epilogue
+	pop rbp
+	ret
+

src/memmove.S

@@ -0,0 +1,36 @@
+[BITS 64]
+	global memmove
+
+	section .text
+
+memmove:	push rbp		;; prologue
+		mov rbp, rsp
+
+init:		xor rcx, rcx		;; init counter 
+		;; mov rax, rdi
+		;; sub rax, rsi		;; get distance 
+		;; cmp rax, rdx		;; compare to length
+		cmp rdi, rsi
+		jbe copy_left
+
+		dec rdx
+copy_right:	cmp rdx, -1
+		je end
+		mov al, byte[rsi + rdx]
+		mov byte[rdi + rdx], al
+		dec rdx
+		jmp copy_right
+
+copy_left:	cmp rdx, rcx
+		je end
+		mov al, [rsi + rcx]
+		mov [rdi + rcx], al
+		inc rcx
+		jmp copy_left
+
+
+end:		mov rax,rdi
+		mov rsp, rbp		;; epilogue
+		pop rbp
+		ret
+

src/memset.S

@@ -0,0 +1,20 @@
+[BITS 64]
+	global memset
+
+	section .text
+
+memset:	push rbp		;; prologue
+	mov rbp, rsp
+
+	mov rax,rdi
+loop:	cmp rdx, 0
+	jz end
+	mov byte[rdi], sil
+	inc rdi
+	dec rdx
+	jmp loop
+
+end:	mov rsp, rbp		;; epilogue
+	pop rbp
+	ret
+

src/rindex.S

@@ -0,0 +1,33 @@
+[BITS 64]
+	global rindex
+
+	section .text
+
+rindex:	push rbp		;; prologue
+	mov rbp, rsp
+
+	xor rcx,rcx
+
+check:	cmp byte[rdi+rcx], 0
+	jz find
+	inc rcx
+	jmp check
+
+find:	cmp rcx, -1
+	je null
+	cmp byte[rdi+rcx], sil
+	je end
+	dec rcx
+	jmp find
+
+null:	mov rax, 0
+	mov rsp, rbp
+	pop rbp
+	ret
+
+end:	add rcx, rdi
+	mov rax, rcx
+	mov rsp, rbp		;;  epilogue
+	pop rbp	
+	ret
+

src/strcasecmp.S

@@ -0,0 +1,43 @@
+[BITS 64]
+	global strcasecmp
+
+	section .text
+
+strcasecmp:	push rbp	;; prologue
+		mov rbp, rsp
+
+		xor rcx,rcx
+
+loop:		mov al, [rdi + rcx]
+		mov ah, [rsi + rcx]
+		jmp check 
+endc:		jmp check2	
+endc2:		cmp al, 0	
+		je end	
+		cmp ah, 0
+		je end
+		cmp al, ah
+		jne end
+		inc rcx
+		jmp loop
+
+check:		cmp al, 65
+		jb endc		
+		cmp al, 90
+		ja endc
+		add al, 32
+		jmp endc
+
+check2:		cmp ah, 65
+		jb endc2
+		cmp ah, 90
+		ja endc2
+		add ah, 32
+		jmp endc2
+
+end:		sub al, ah
+		movsx rax, al
+
+		mov rsp, rbp	;; epilogue
+		pop rbp
+		ret

src/strchr.S

@@ -0,0 +1,22 @@
+[BITS 64]
+	global strchr
+
+	section .text
+
+strchr:	push rbp	;; prologue
+	mov rbp, rsp
+
+loop:	cmp byte[rdi], sil
+	jz found
+	cmp byte[rdi], 0
+	jz nfound
+	inc rdi
+	jmp loop
+
+found:	mov rax, rdi
+	jmp end
+nfound:	mov rax, 0
+
+end:	mov rsp, rbp	;; epilogue
+	pop rbp
+	ret

src/strcmp.S

@@ -0,0 +1,27 @@
+[BITS 64]
+	global strcmp
+
+	section .text
+
+strcmp:	push rbp	;; prologue
+	mov rbp, rsp
+
+	xor rcx,rcx
+loop:	
+	mov al, [rdi + rcx]
+	mov ah, [rsi + rcx]
+	cmp al, 0
+	je end
+	cmp ah, 0
+	je end
+	cmp al, ah
+	jne end
+	inc rcx
+	jmp loop
+
+end:	sub al, ah
+	movsx rax, al
+
+	mov rsp, rbp	;; epilogue
+	pop rbp
+	ret

src/strcpy.S

@@ -0,0 +1,24 @@
+[BITS 64]
+	global strcpy
+
+	section .text
+
+strcpy:	push rbp		;; prologue
+	mov rbp, rsp
+
+	xor r10, r10
+	xor r11b, r11b
+
+loop:	cmp byte[rsi + r10], 0
+	je end
+	mov r11b, byte[rsi + r10]
+	mov byte[rdi + r10], r11b
+	inc r10
+	jmp loop
+
+end:	mov byte[rdi + r10], 0
+	mov rax, rdi
+	mov rsp, rbp		;;  epilogue
+	pop rbp	
+	ret
+

src/strcspn.S

@@ -0,0 +1,34 @@
+[BITS 64]
+		global strcspn
+
+		section .text
+
+strcspn:	push rbp		;; prologue
+		mov rbp, rsp
+
+		xor rcx,rcx
+
+loop:		cmp byte[rdi+rcx], 0
+		je end	
+		jmp find			
+endf:		inc rcx		
+		jmp loop	
+
+find:		xor r10, r10
+		xor r11, r11
+
+loopf:		cmp byte[rsi + r10], 0
+		je endf
+		cmp byte[rdi + rcx], 0
+		je endf
+		mov r11b, byte[rdi + rcx]
+		cmp byte[rsi + r10], r11b
+		je end
+		inc r10
+		jmp loopf
+
+end:		mov rax, rcx
+		mov rsp, rbp		;;  epilogue
+		pop rbp	
+		ret
+

src/strlen.S

@@ -0,0 +1,20 @@
+[BITS 64]
+	global strlen
+
+	section .text
+
+strlen:	push rbp		;; prologue
+	mov rbp, rsp
+
+	xor rcx,rcx	
+check:	cmp byte[rdi+rcx], 0
+	jz end
+	inc rcx
+	jmp check
+
+end:	mov rax,rcx
+
+	mov rsp, rbp		;;  epilogue
+	pop rbp	
+	ret
+

src/strncmp.S

@@ -0,0 +1,30 @@
+[BITS 64]
+		global strncmp
+
+		section .text
+
+strncmp:	push rbp	;; prologue
+		mov rbp, rsp
+
+		xor rcx,rcx
+		xor rax, rax
+loop:
+		cmp rcx, rdx
+		je end
+		mov al, [rdi + rcx]
+		mov ah, [rsi + rcx]
+		cmp al, 0
+		je end
+		cmp ah, 0
+		je end
+		cmp al, ah
+		jne end
+		inc rcx
+		jmp loop
+
+end:		sub al, ah
+		movsx rax, al
+
+		mov rsp, rbp	;; epilogue
+		pop rbp
+		ret