group3: copy from in to out

Author: h908714124

group3/group3.s

@@ -38,9 +38,9 @@
 
 fh:
 	.quad	0
-source_buffer:
+in:
 	.quad	0
-out_buffer:
+out:
 	.quad	0
 siz:
 	.quad	0
@@ -98,7 +98,7 @@ read:
 	enter
 	mov	$READ, %rax
 	mov	fh(%rip), %rdi
-	mov	source_buffer(%rip), %rsi
+	mov	in(%rip), %rsi
 	mov	siz(%rip), %rdx
 	syscall
 	return
@@ -108,11 +108,12 @@ copy:
 	mov	$0, %rcx
 	cmp	%rcx, siz(%rip)
 	je	copy_done
+	mov	in(%rip), %rsi
 copy_loop:
-	lea	source_buffer(%rip), %rsi
-	add	%rcx, %rsi
-	mov	(%rsi), %rdx
-	mov	%rdx, out_buffer(%rsi)
+	mov	%rcx, %rdx
+	add	out(%rip), %rdx
+	mov	(%rsi, %rcx), %rdi
+	movb	%dil, (%rdx)
 	inc	%rcx
 	cmp	%rcx, siz(%rip)
 	jne	copy_loop
@@ -123,7 +124,7 @@ write:
 	enter
 	mov	$WRITE, %rax
 	mov	$STDOUT, %rdi
-	mov	source_buffer(%rip), %rsi
+	mov	out(%rip), %rsi
 	mov	siz(%rip), %rdx
 	syscall
 	return
@@ -138,7 +139,11 @@ close:
 munmap:
 	enter
 	mov	$MUNMAP, %rax
-	lea	source_buffer, %rdi
+	lea	in, %rdi
+	mov	siz(%rip), %rsi
+	syscall
+	mov	$MUNMAP, %rax
+	lea	out, %rdi
 	mov	siz(%rip), %rsi
 	syscall
 	return
@@ -147,11 +152,11 @@ main:
 	call	open
 	call	stat
 	call	mmap
-	mov	%rax, source_buffer(%rip)
+	mov	%rax, in(%rip)
 	call	read
 	call	mmap
-	mov	%rax, out_buffer(%rip)
-	#call	copy	TODO
+	mov	%rax, out(%rip)
+	call	copy
 	call	write
 	call	close
 	call	munmap

memcpy/Makefile

@@ -8,3 +8,6 @@ build:
 
 clean:
 	@rm -f memcpy.o memcpy
+
+check: build
+	./memcpy | grep -q ^0xa$ && printf "\033[1;32m[OK]\033[0m\n"

memcpy/memcpy.s

@@ -1,169 +1,65 @@
-	.file	"draft.c"
+	.bss
+out:
+	.zero	8
+in:
+	.zero	8
+
 	.text
-	.globl	get_zero
-	.type	get_zero, @function
-get_zero:
-.LFB23:
-	.cfi_startproc
-	movl	$128, %edx
-.L2:
-	movl	%edx, %eax
-	shrl	$31, %eax
-	addl	%edx, %eax
-	sarl	%eax
-	movl	%eax, %edx
-	cmpl	$16, %eax
-	jne	.L2
-	movl	$0, %eax
-	ret
-	.cfi_endproc
-.LFE23:
-	.size	get_zero, .-get_zero
-	.globl	get_one
-	.type	get_one, @function
-get_one:
-.LFB24:
-	.cfi_startproc
-	movl	$128, %edx
-.L4:
-	movl	%edx, %eax
-	shrl	$31, %eax
-	addl	%edx, %eax
-	sarl	%eax
-	movl	%eax, %edx
-	cmpl	$8, %eax
-	jne	.L4
-	movl	$1, %eax
-	ret
-	.cfi_endproc
-.LFE24:
-	.size	get_one, .-get_one
-	.globl	get_two
-	.type	get_two, @function
-get_two:
-.LFB25:
-	.cfi_startproc
-	movl	$128, %edx
-.L6:
-	movl	%edx, %eax
-	shrl	$31, %eax
-	addl	%edx, %eax
-	sarl	%eax
-	movl	%eax, %edx
-	cmpl	$4, %eax
-	jne	.L6
-	movl	$2, %eax
-	ret
-	.cfi_endproc
-.LFE25:
-	.size	get_two, .-get_two
-	.globl	get_three
-	.type	get_three, @function
-get_three:
-.LFB26:
-	.cfi_startproc
-	movl	$128, %edx
-.L8:
-	movl	%edx, %eax
-	shrl	$31, %eax
-	addl	%edx, %eax
-	sarl	%eax
-	movl	%eax, %edx
-	cmpl	$32, %eax
-	jne	.L8
-	movl	$3, %eax
-	ret
-	.cfi_endproc
-.LFE26:
-	.size	get_three, .-get_three
 	.globl	main
-	.type	main, @function
+
 main:
-.LFB27:
-	.cfi_startproc
-	pushq	%rbp
-	.cfi_def_cfa_offset 16
-	.cfi_offset 6, -16
-	movq	%rsp, %rbp
-	.cfi_def_cfa_register 6
-	pushq	%r13
-	pushq	%r12
-	pushq	%rbx
-	subq	$8, %rsp
-	.cfi_offset 13, -24
-	.cfi_offset 12, -32
-	.cfi_offset 3, -40
-	movl	$4, %edi
+	push	%rbp
+	mov	%rsp, %rbp
+	push	%r13
+	push	%r12
+	push	%rbx
+	sub	$8, %rsp
+	mov	$4, %rdi
 	call	malloc@PLT
-	movq	%rax, %rbx
-	movq	%rax, in(%rip)
-	movl	$4, %edi
+	mov	%rax, %rbx
+	mov	%rax, in(%rip)
+	mov	$4, %rdi
 	call	malloc@PLT
-	movq	%rax, out(%rip)
+	mov	%rax, out(%rip)
 	movb	$48, (%rbx)
-	movq	in(%rip), %rax
+	mov	in(%rip), %rax
 	movb	$120, 1(%rax)
-	movq	in(%rip), %rax
+	mov	in(%rip), %rax
 	movb	$97, 2(%rax)
-	movq	in(%rip), %rax
+	mov	in(%rip), %rax
 	movb	$10, 3(%rax)
-	movl	$0, %r13d
-	movl	$1, %r12d
-	movl	$2, %ebx
-	movl	$3, %eax
-	movslq	%r13d, %rdx
-	movq	%rdx, %rcx
+	mov	$3, %rax
+	mov	$0, %rdx
+	mov	$0, %rcx
 	add	out(%rip), %rcx
-	movq	in(%rip), %rsi
-	movzbl	(%rsi,%rdx), %edx
+	mov	in(%rip), %rsi
+	mov	(%rsi, %rdx), %rdx
 	movb	%dl, (%rcx)
-	movslq	%r12d, %rdx
-	movq	%rdx, %rcx
+	mov	$1, %rdx
+	mov	%rdx, %rcx
 	add	out(%rip), %rcx
-	movq	in(%rip), %rsi
-	movzbl	(%rsi,%rdx), %edx
+	mov	(%rsi, %rdx), %rdx
 	movb	%dl, (%rcx)
-	movslq	%ebx, %rdx
-	movq	%rdx, %rcx
+	mov	$2, %rdx
+	mov	%rdx, %rcx
 	add	out(%rip), %rcx
-	movq	in(%rip), %rsi
-	movzbl	(%rsi,%rdx), %edx
+	mov	(%rsi, %rdx), %rdx
 	movb	%dl, (%rcx)
-	cltq
-	movq	%rax, %rdx
+	mov	$3, %rdx
 	add	out(%rip), %rdx
-	movq	in(%rip), %rcx
-	movzbl	(%rcx,%rax), %eax
+	mov	in(%rip), %rcx
+	mov	(%rcx, %rax), %rax
 	movb	%al, (%rdx)
-	movl	$4, %ecx
+	mov	$4, %rcx
 	mov	out(%rip), %rdx
-	movl	$1, %esi
-	movl	$1, %edi
-	movl	$0, %eax
+	mov	$1, %rsi
+	mov	$1, %rdi
+	mov	$0, %rax
 	call	syscall@PLT
-	movl	$0, %eax
+	mov	$0, %rax
 	add	$8, %rsp
 	pop	%rbx
 	pop	%r12
 	pop	%r13
 	pop	%rbp
-	.cfi_def_cfa 7, 8
 	ret
-	.cfi_endproc
-.LFE27:
-	.size	main, .-main
-	.globl	out
-	.bss
-	.align 8
-	.type	out, @object
-	.size	out, 8
-out:
-	.zero	8
-	.globl	in
-	.align 8
-	.type	in, @object
-	.size	in, 8
-in:
-	.zero	8
-	.ident	"GCC: (Debian 14.2.0-19) 14.2.0"
-	.section	.note.GNU-stack,"",@progbits