push ebp mov ebp, esp sub esp, 0000000Ch push 00401326h ; undef 'Ignore this mov eax, fs:[00000000h] push eax mov fs:[00000000h], esp sub esp, 00000078h push ebx push esi push edi mov var_C, esp mov var_8, 00401238h mov edi, [004010CCh] ; __vbaFixstrConstruct lea eax, var_1C xor esi, esi push eax push 00000100h mov var_18, esi mov var_24, esi mov var_28, esi mov var_2C, esi mov var_30, esi mov var_34, esi mov var_38, esi mov var_3C, esi mov var_40, esi mov var_44, esi mov var_54, esi mov var_64, esi mov var_74, esi call edi lea ecx, var_20 push ecx push 00000100h call edi mov edx, var_1C mov edi, [0040114Ch] ; %S_eax_S = #StkVar1%StkVar2 '__vbaStrToAnsi push 00000100h lea eax, var_40 push edx push eax call edi lea ecx, var_2C push eax lea edx, var_28 push ecx mov ecx, var_20 lea eax, var_30 push edx push eax push 00000100h lea edx, var_38 push ecx push edx call edi push eax lea eax, var_34 push 00402544h ; "C:\" push eax call edi push eax GetVolumeInformation(%x1, %x2, %x3, %x4, %x5, %x6, %x7, %x8) call [00401048h] ; GetLastError() mov ecx, var_38 mov edi, [004010E8h] ; %S_eax_S = #StkVar1%StkVar2 '__vbaStrToUnicode lea edx, var_3C push ecx push edx call edi mov ebx, [0040103Ch] ; __vbaLsetFixstr push eax mov eax, var_20 push eax push esi call ebx mov ecx, var_40 lea edx, var_44 push ecx push edx call edi push eax mov eax, var_1C push eax push esi call ebx lea ecx, var_44 lea edx, var_40 push ecx lea eax, var_3C push edx lea ecx, var_38 push eax lea edx, var_34 push ecx push edx push 00000005h call [0040112Ch] ; %v = "" mov eax, var_30 add esp, 00000018h push eax call [0040100Ch] ; @CStr(%StkVar1) mov esi, [00401170h] ; %ecx = %S_edx_S '__vbaStrMove mov edx, eax lea ecx, var_24 call %ecx = %S_edx_S '__vbaStrMove mov ecx, var_24 push 00000001h push ecx push 00402550h push 00000001h call [00401114h] ; @InStr(%StkVar4, %StkVar3, %StkVar2, %StkVar1) test eax, eax jz 00403907h lea edx, var_24 lea eax, var_54 mov var_6C, edx push eax lea ecx, var_74 push 00000002h lea edx, var_64 push ecx push edx mov var_4C, 80020004h mov var_54, 0000000Ah mov var_74, 00004008h call [00401088h] ; %x1 = Mid(%StkVar2, %StkVar3, %StkVar4) lea eax, var_64 push eax call [0040101Ch] ; @%x1 '__vbaStrVarMove mov edx, eax lea ecx, var_24 call %ecx = %S_edx_S '__vbaStrMove lea ecx, var_64 lea edx, var_54 push ecx push edx push 00000002h call [00401024h] ; undef 'Ignore this '__vbaFreeVarList add esp, 0000000Ch lea ecx, var_74 push 00000007h lea edx, var_54 lea eax, var_24 push ecx push edx mov var_6C, eax mov var_74, 00004008h call [00401168h] ; %x1 = Left(%StkVar2, %StkVar3) lea eax, var_54 push eax call [0040101Ch] ; @%x1 '__vbaStrVarMove mov edx, eax lea ecx, var_18 call %ecx = %S_edx_S '__vbaStrMove lea ecx, var_54 call [00401018h] ; undef 'Ignore this '__vbaFreeVar push 0040399Ah jmp 00403984h test var_4, 04h jz 00403954h lea ecx, var_18 call [00401190h] ; %ecx = "" lea ecx, var_44 lea edx, var_40 push ecx lea eax, var_3C push edx lea ecx, var_38 push eax lea edx, var_34 push ecx push edx push 00000005h call [0040112Ch] ; %v = "" lea eax, var_64 lea ecx, var_54 push eax push ecx push 00000002h call [00401024h] ; undef 'Ignore this '__vbaFreeVarList add esp, 00000024h ret mov esi, [00401190h] ; %ecx = "" lea ecx, var_1C call %ecx = "" lea ecx, var_20 call %ecx = "" lea ecx, var_24 call %ecx = "" ret mov ecx, var_14 mov eax, var_18 pop edi pop esi mov fs:[00000000h], ecx pop ebx mov esp, ebp pop ebp ret nop
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.
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.
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.
There are various define directives to allocate space for variables for both initialized and uninitialized data.
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 |
| 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 can be defined using
CONSTANT_NAME EQU regular-exp or value
%assign constant_name value
%define constant_name value
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.
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