Hex To Arm Converter -

Find hex pattern: 00 00 A0 E3 (NOP). Convert to 01 00 A0 E3 → MOV R0, R1. This changes behavior without recompilation.

While you’ll rarely do this by hand, understanding it demystifies the magic.

Hex to ARM by hand (simplified):

The industry standard tools for handling ARM hex conversion are varied, ranging from command-line utilities to full IDEs.

for insn in md.disasm(hex_bytes, 0x1000): print(f"0xinsn.address:x:\tinsn.mnemonic\tinsn.op_str") hex to arm converter

Output:

0x1000: mov r1, #42

from capstone import Cs, CS_ARCH_ARM, CS_MODE_ARM
hex_bytes = bytes.fromhex("E3A00001")
md = Cs(CS_ARCH_ARM, CS_MODE_ARM)
for insn in md.disasm(hex_bytes, 0x1000):
print(f"0xinsn.address:x: insn.mnemonic insn.op_str") Find hex pattern:  00 00 A0 E3  (NOP)
| Mode | Instruction width | Example Hex | Assembly | Tool command |
|------|----------------|-------------|----------|--------------|
| ARM 32-bit | 32 bits | E3A00001 | MOV R0, #1 | rasm2 -a arm -d "E3A00001" |
| Thumb 16-bit | 16 bits | 2001 | MOVS R0, #1 | rasm2 -a arm -b 16 -d "2001" |
| Thumb-2 32-bit | 32 bits | F04F 0001 | MOV R0, #1 | Use Capstone with CS_MODE_THUMB |