assembly and disassembly x86 64 instructions

assembly_disassembly_x86_64.sh

n() { ndisasm -b64 tmp.bin; xxd -g1 tmp.bin; xxd -b tmp.bin; rm tmp.bin; }
a() { { echo "bits 64"; echo "$@"; } > tmp.s; nasm -f bin -D ARCH_x86_64 -o tmp.bin tmp.s; n; }
h() { printf '%s' "$@" | xxd -r -p > tmp.bin; n; }
b() { binary_value=$(echo "$@" | tr -d '[:space:]\n'); hex_value=$(printf '%0*X' $(((${#binary_value}+3)/4)) "$((2#$binary_value))"); h "$hex_value"; }
hx() { h "${@//[[:space:]]/}" ; }


# nasm_build() {
#   ndisasm -b 64 tmp.bin
#   xxd -g1 tmp.bin
#   xxd -b tmp.bin
#   rm tmp.bin
# }

# asm() {
#   { echo "bits 64"; echo "$@"; } > tmp.s
#   nasm -f bin -D ARCH_x86_64 -o tmp.bin tmp.s
#   nasm_build
# }

# nasm_hex() {
#   printf '%s' "$1" | xxd -r -p > tmp.bin
#   nasm_build
# }

# bin() {
#   binary_value=$(echo "$*" | tr -d ' ')
#   hex_value=$(printf '%0*X' $(((${#binary_value}+3)/4)) "$((2#$binary_value))")
#   nasm_hex "$hex_value"
# }

# hex() {
#   hex_value=$(echo "$*" | tr -d ' ')
#   nasm_hex "$hex_value"
# }



## Tests

# $ hx 01 f1 01 f1                                                                                                                                                                                                                                             ✔ 
# 00000000  01F1              add ecx,esi
# 00000002  01F1              add ecx,esi
# 00000000: 01 f1 01 f1                                      ....
# 00000000: 00000001 11110001 00000001 11110001                    ....


# $ a 'add ecx,esi'                                                                                                                                                                                                                                            ✔ 
# 00000000  01F1              add ecx,esi
# 00000000: 01 f1                                            ..
# 00000000: 00000001 11110001                                      ..

# $ b 00000001 11110001                                                                                                                                                                                                                                        ✔ 
# 00000000  01F1              add ecx,esi
# 00000000: 01 f1                                            ..
# 00000000: 00000001 11110001                                      ..