 	.file	"plain_asm.c"
	.intel_syntax noprefix
	.text
	.global	main
	.type	main, @function
main:
.LFB6:
	.cfi_startproc
	  push   ebp
    dec    eax
    mov    ebp,esp
    dec    eax
    sub    esp,0x30
    mov    dword ptr[ebp-0x24], edi
    dec    eax
    mov    DWORD PTR [ebp-0x30],esi
    dec    eax
    mov    eax,0x7171746a
    pop    ebx
    pop    esp
    pop    ecx
    pop    ebx
    dec    eax
    mov    edx,0x585f6a59
    push   ebx
    imul   ebp,DWORD PTR [edx],0x27
    dec    eax
    mov    DWORD PTR [ebp-0x20],eax
    dec    eax
    mov    DWORD PTR [ebp-0x18],edx
    mov    DWORD PTR [ebp-0x10],0x515d524f
    mov    WORD PTR [ebp-0xc],0x51
    mov    DWORD PTR [ebp-0x4],0x0
    mov    DWORD PTR [ebp-0x4],0x0
    jmp    0x68
    mov    eax,DWORD PTR [ebp-0x4]
    dec    eax
    cwde
    movzx  eax,BYTE PTR [ebp+eax*1-0x20]
    mov    edx,eax
    mov    eax,DWORD PTR [ebp-0x4]
    add    eax,edx
    mov    edx,eax
    mov    eax,DWORD PTR [ebp-0x4]
    dec    eax
    cwde
    mov    BYTE PTR [ebp+eax*1-0x20],dl
    add    DWORD PTR [ebp-0x4],0x1
    cmp    DWORD PTR [ebp-0x4],0x14
    jle    0x48
    dec    eax
    lea    eax,[ebp-0x20]
    dec    eax
    mov    edi,eax
    call   0xfffffef7
    mov    eax,0x0
    leave
    ret
	.cfi_endproc
.LFE6:
	.size	main, .-main
	.globl	func_1
	.type	func_1, @function
func_1:
.LFB7:
	.cfi_startproc
	push	rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	mov	rbp, rsp
	.cfi_def_cfa_register 6
	mov	BYTE PTR -1[rbp], 25
	mov	DWORD PTR -8[rbp], 0
	jmp	.L4
.L5:
	mov	eax, DWORD PTR -8[rbp]
	add	eax, 10
	mov	edx, eax
	mov	eax, edx
	sal	eax, 2
	add	eax, edx
	lea	edx, 0[0+rax*4]
	add	eax, edx
	add	BYTE PTR -1[rbp], al
	add	DWORD PTR -8[rbp], 1
.L4:
	cmp	DWORD PTR -8[rbp], 9
	jle	.L5
	movzx	eax, BYTE PTR -1[rbp]
	mov	DWORD PTR -12[rbp], eax
	mov	eax, DWORD PTR -12[rbp]
	pop	rbp
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE7:
	.size	func_1, .-func_1
	.globl	func_2
	.type	func_2, @function
func_2:
.LFB8:
	.cfi_startproc
	push	rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	mov	rbp, rsp
	.cfi_def_cfa_register 6
	mov	DWORD PTR -4[rbp], 207
	mov	eax, DWORD PTR -4[rbp]
	pop	rbp
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE8:
	.size	func_2, .-func_2
	.globl	func_3
	.type	func_3, @function
func_3:
.LFB9:
	.cfi_startproc
	push	rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	mov	rbp, rsp
	.cfi_def_cfa_register 6
	mov	DWORD PTR -36[rbp], edi
	mov	DWORD PTR -40[rbp], esi
	cmp	DWORD PTR -36[rbp], 64
	jg	.L10
	mov	eax, 24
	jmp	.L11
.L10:
	cmp	DWORD PTR -40[rbp], 211
	jle	.L12
	mov	eax, 20
	jmp	.L11
.L12:
	cmp	DWORD PTR -36[rbp], 0
	je	.L13
	cmp	DWORD PTR -40[rbp], 0
	jne	.L13
	mov	eax, 120
	jmp	.L11
.L13:
	cmp	DWORD PTR -36[rbp], 0
	jne	.L14
	cmp	DWORD PTR -40[rbp], 0
	je	.L14
	mov	eax, 220
	jmp	.L11
.L14:
	mov	eax, DWORD PTR -36[rbp]
	or	eax, DWORD PTR -40[rbp]
	mov	DWORD PTR -12[rbp], eax
	mov	eax, DWORD PTR -36[rbp]
	and	eax, DWORD PTR -40[rbp]
	mov	DWORD PTR -16[rbp], eax
	mov	eax, DWORD PTR -36[rbp]
	xor	eax, DWORD PTR -40[rbp]
	mov	DWORD PTR -20[rbp], eax
	mov	DWORD PTR -4[rbp], 0
	mov	DWORD PTR -8[rbp], 0
	jmp	.L15
.L16:
	mov	eax, DWORD PTR -16[rbp]
	sub	eax, DWORD PTR -8[rbp]
	mov	edx, eax
	mov	eax, DWORD PTR -12[rbp]
	add	eax, edx
	add	DWORD PTR -4[rbp], eax
	add	DWORD PTR -8[rbp], 1
.L15:
	mov	eax, DWORD PTR -8[rbp]
	cmp	eax, DWORD PTR -20[rbp]
	jl	.L16
	mov	eax, DWORD PTR -4[rbp]
.L11:
	pop	rbp
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE9:
	.size	func_3, .-func_3
	.ident	"GCC: (Debian 9.2.1-22) 9.2.1 20200104"
	.section	.note.GNU-stack,"",@progbits

created 4 years ago

Assembly Online Compiler

Write, Run & Share Assembly code online using OneCompiler's Assembly online compiler for free. It's one of the robust, feature-rich online compilers for Assembly language. Getting started with the OneCompiler's Assembly compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Assembly and start coding.

About Assembly

Assembly language(asm) is a low-level programming language, where the language instructions will be more similar to machine code instructions.

Every assembler may have it's own assembly language designed for a specific computers or an operating system.

Assembly language requires less execution time and memory. It is more helful for direct hardware manipulation, real-time critical applications. It is used in device drivers, low-level embedded systems etc.

Syntax help

Assembly language usually consists of three sections,

Data section

To initialize variables and constants, buffer size these values doesn't change at runtime.
bss section

To declare variables
text section

_start specifies the starting of this section where the actually code is written.

Variables

There are various define directives to allocate space for variables for both initialized and uninitialized data.

1. To allocate storage space to Initialized data

Syntax

variable-name    define-directive    initial-value

Define Directive	Description	Allocated Space
DB	Define Byte	1 byte
DW	Define Word	2 bytes
DD	Define Doubleword	4 bytes
DQ	Define Quadword	8 bytes
DT	Define Ten Bytes	10 bytes

2. To allocate storage space to un-initialized data

Define Directive	Description
RESB	Reserve a Byte
RESW	Reserve a Word
RESD	Reserve a Doubleword
RESQ	Reserve a Quadword
REST	Reserve a Ten Bytes

Constants

Constants can be defined using

1. equ

To define numeric constants

CONSTANT_NAME EQU regular-exp or value

2. %assign

To define numeric constants.

%assign constant_name value

3. %define

To define numeric or string constants.

%define constant_name value

Loops

Loops are used to iterate a set of statements for a specific number of times.

mov ECX,n
L1:
;<loop body>
loop L1

where n specifies the no of times loops should iterate.

Procedures

Procedure is a sub-routine which contains set of statements. Usually procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

procedure_name:
   ;procedure body
   ret