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NAME rasm2 -- Radare2 Assembler and Disassembler Tool SYNOPSIS rasm2 [-ACdDehHjLvwrNqxp] [-a arch] [-b bits] [-c cpu] [-F parser] [-k kernel] [-o ofile] [-s addr] [-@ addr] [-S syntax] [-i len] [-l len] [code|hex|-] DESCRIPTION Assembles and disassembles code or hexpair strings for multiple architec- tures and syntax formats. -a arch Set architecture plugin -A Show analysis information of given hexpair string -b bits Set architecture bits (8, 16, 32, 64) -B Binary input/output (-l is mandatory for binary input) -c cpu Select specific CPU (depends on -a arch) -C Output in C format -d Disassemble hexpair bytes. rasm2 -d 9090 -D Disassemble showing hexpair and opcode -e Use big endian instead of little endian -E Output disassembled instructions in ESIL format -f file Read data from file instead of ARG -F parser Specify parse plugin to be used (pseudo) -h Show usage help message -hh Show long help message including supported assembler directives -H [var] Display variable -i len Ignore/skip N bytes from the beginning of the input buffer -j Output in json format -k kernel Select operating system (linux, windows, darwin, android, ios, ...) -l len Input/Output length -L [name] List RArch plugins: (a=asm, d=disasm, e=esil, p=parse) -LL [name] List RAsm parse plugins -N Don't load any plugin, same as R2_NOPLUGINS=1 or r2 -N -o ofile Output to file, for example 'rasm2 -Bf a.asm' -p Run SPP over input for assembly -q Quiet output (handy for -L, -v, ...) -r Show output in r2 script -s addr Define initial start/seek address (default 0) -@ addr Alias for -s -S syntax Select syntax output (intel, att, masm, ...) -v Show version information -w Describe opcode (what's op) -x Use hex dwords instead of hexpairs in the assembler output ENVIRONMENT R2_NOPLUGINS Do not load shared plugins (speedup loading) R2_PLUGINS_ORDER Plugin path order: e=env, h=home, s=system; ? prints help R2_LOG_LEVEL Change the log level R2_DEBUG If defined, show error messages and crash signal R2_DEBUG_ASSERT Enables runtime assertions for debugging RASM2_ARCH Same as rasm2 -a RASM2_BITS Same as rasm2 -b DIRECTIVES List the supported assembler and preprocessor directives with: $ rasm2 -hh EXAMPLES Assemble opcode: $ rasm2 -a x86 -b 32 'mov eax, 33' Disassemble opcode: $ rasm2 -d 90 Show all supported architectures: $ rasm2 -L Assemble with specific syntax: $ rasm2 -a x86 -b 32 -S att 'mov eax, 33' Output in JSON format: $ rasm2 -j -a x86 -b 32 'mov eax, 33' Use big endian: $ rasm2 -e -a arm -b 32 'add r0, r0, r1' Disassemble and show ESIL output: $ rasm2 -d -E 90 SEE ALSO radare2(1) AUTHORS pancake <pancake@nopcode.org> Jul 10, 2025 RASM2(1)
NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | DIRECTIVES | EXAMPLES | SEE ALSO | AUTHORS
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