asmbf

Brainfuck interpreters written in pure assembly.

Super small and easy to understand

Size

Right 300 lines of code, executable less than 12kB with a lot of padding.

Assembling

I use C preprocessor to handle some macros. gcc and clang both work for this.

You should NOT link the standard C library, since I write _start as entry point on my own.

$ gcc asmbf.S -o asmbf -nostdlib -no-pie
$ clang asmbf.S -o asmbf -nostdlib -no-pie

Usage

$ asmbf SCRIPT_PATH

Compatibility

Written in assembly, it is only available on x86-64 Linux platforms.

Error handling

Unfortunately, this interpreter will simply crash if you try to run a problemly brainfuck script.

rv64gc port

asmbf has been ported to rv64gc platforms, see asmbf-rv64.S

Compile it with

$ gcc asmbf.S -o asmbf -nostdlib -no-pie -mno-relax asmbf-rv64.S -o asmbf-rv64
$ clang asmbf.S -o asmbf -nostdlib -no-pie -mno-relax asmbf-rv64.S -o asmbf-rv64

You could also try it with user mode QEMU, with command like

$ qemu-riscv64 asmbf-rv64 HelloWorld.bf

Blog

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