rasm2(1) radare2 assembler and disassembler tool


rasm2 [-dDfBCLevw ] [-F in:out ] [-o offset ] [-a arch ] [-b bits ] [-c cpu ] [-s syntax ] [-i int ] [-l int ] [ARG]


This tool uses r_asm to assemble and disassemble files or hexpair strings. It supports a large list of architectures which can be listed using the -L flag.

-a arch
Set architecture plugin
-b bits
Set architecture bits
Binary input/output (-l is mandatory for binary input)
-c cpu
Select specific CPU (depends on -a arch)
Output in C format
Disassemble hexpair bytes. rasm2 -d 9090
Disassemble showing hexpair and opcode
Use big endian (or swap endianness if used more than once)
Read data from file instead of ARG.
-F in:out
Specify input and/or output filters (att2intel, x86.pseudo, ...)
Show usage help message.
-l int
Input/Output length
-i int
Ignore/skip N bytes from the beginning of the input buffer
List supported asm plugins
-o offset
Offset of the opcode to assemble (default is 0)
-s syntax
Select syntax output (intel, att)
Describe opcode (whats op)


Assemble opcode:

  $ rasm2 -a x86 -b 32 'mov eax, 33'

Disassemble opcode:

  $ rasm2 -d 90


Written by pancake <[email protected]> and nibble <[email protected]>.