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è? @ À ûÿÿo þÿÿo ÿÿÿo ðÿÿo þ ùÿÿo à= 6 @ GCC: (Debian 13.2.0-2) 13.2.0 ñÿ | ñÿ € ° 3 ð I @ U Ø= | 0 ˆ Ð= § ñÿ ñÿ ² Ø ñÿ À à= É Ü è? ò K @ + < @ C À I @ V e @ r @ O P " † @ ’ 9 † — @ £ ½ " Ø Scrt1.o __abi_tag crtstuff.c deregister_tm_clones __do_global_dtors_aux completed.0 __do_global_dtors_aux_fini_array_entry frame_dummy __frame_dummy_init_array_entry baby-rev.c __FRAME_END__ _DYNAMIC __GNU_EH_FRAME_HDR _GLOBAL_OFFSET_TABLE_ __libc_start_main@GLIBC_2.34 _ITM_deregisterTMCloneTable puts@GLIBC_2.2.5 _edata _fini __data_start __gmon_start__ __dso_handle _IO_stdin_used _end __bss_start main __TMC_END__ _ITM_registerTMCloneTable __cxa_finalize@GLIBC_2.2.5 _init .symtab .strtab .shstrtab .interp .note.gnu.property .note.gnu.build-id .note.ABI-tag .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn .rela.plt .init .plt.got .text .fini .rodata .eh_frame_hdr .eh_frame .init_array .fini_array .dynamic .got.plt .data .bss .comment # 8 8 6 X X $ I | | W öÿÿo $ a È È ¨ i p p q ÿÿÿo þ þ ~ þÿÿo 0 @ @ À — B ¡ œ § @ @ ° P P o ¶ À À ¼ Ä , Ò 0 0 ¬ Ü Ð= Ð- è Ø= Ø- ô à= à- à « À? À/ ( ý è? è/ @ 0 @ 0 0 0 80 ` ˜3 Þ v5 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