|| - ELF Header 00 - Byte 00 .. ff - Byte ff 'a - Character a (byte 0x61) '! - Character ! (byte 0x21) etc. zA - Zero rax im - Set rax to an immediate value, e.g. im;05;00;00;00;00;00;00;00; will set rax to 5. ax bx cx dx sp bp si di A B C D S R I J The instruction for moving one register to another is [dest][src], e.g. CS is mov rcx, rsp. XA - mov r8, rax YA - mov r9, rax ZA - mov r10, rax xc - xchg rax, rbx sq - mov qword [rbx], rax lq - mov rax, qword [rbx] sd - mov dword [rbx], eax ld - mov eax, dword [rbx] sw - mov word [rbx], ax lw - mov ax, word [rbx] sb - mov byte [rbx], al lb - mov al, byte [rbx] Sq - mov qword [rsp], rax Lq - mov rax, qword [rsp] nA - neg rax +B - add rax, rbx -* - imul rbx -/ - idiv rbx +* - mul rbx +/ - div rbx !A - not rax &B - and rax, rbx |B - or rax, rbx ^B - xor rax, rbx C - shr rax, cl >I - shr rax, imm8 ]C - sar rax, cl ]I - sar rax, imm8 -S - sub rsp, imm32 cm - cmp rax, rbx te - test rax, rax jm - jmp rel32 je - je rel32 jn - jne rel32 jl - jl rel32 jb - jb rel32 ja - ja rel32 cl - call rax re - ret sy - syscall