Difference between: Opcode, byte code, mnemonics, machine …
Jul 14, 2013 · OPCODE: It is a number interpreted by your machine (virtual or silicon) that represents the operation to perform BYTECODE: Same as machine code, except, its mostly …
How to read the Intel Opcode notation - Stack Overflow
Feb 22, 2013 · 3.1.1.1 Opcode Column in the Instruction Summary Table (Instructions without VEX Prefix) The “Opcode” column in the table above shows the object code produced for each …
Opcode vs Operand in x86 assembly source code - Stack Overflow
Nov 24, 2022 · The opcode is the machine code representation of the instruction. Opcode can include the entire instruction's machine code or only the byte or bytes that select the …
assembly - Intel x86 Opcode Reference? - Stack Overflow
Jun 19, 2011 · What is a relatively quick and easy method of looking up what an arbitrary opcode means (say, 0xC8) in x86? The Intel Software Developer's manual isn't very fun to search …
c - What is the actual relation between assembly, machine code ...
Dec 24, 2014 · OpCode - The value for a command: In the sample, the opcode for pushing a string is 13. Assembly - human readable instructions for a CPU's internal machine code. Pretty …
How to tell the length of an x86 instruction? - Stack Overflow
Terminology: "opcode" is the part of the instruction that selects the operation, not including operands, or non-mandatory prefixes that modify the operation (e.g. operand-size). Using …
What is the difference between machine code and opcode?
The question is mostly related to PHP because IMHO opcode is mostly mentioned in PHP context. In fact Java is more popular for its byte-/opcode 1) Is opcode just a portion of machine …
assembly - JMP to absolute address (op codes) - Stack Overflow
Jumps are usually relative. There's an opcode EA for a jump to an absolute far address, and opcodes for jumps to an indirect address (where the operand specifies the memory location …
ARM64 add instruction preferred opcode? - Stack Overflow
Jul 29, 2025 · ARM64 supports add (extended register) that must be used for SP register, and add (shifted register) that must be used for ZR register. The instruction add X0, X1, X2 …
linux - How to get opcodes of a c program - Stack Overflow
Mar 24, 2012 · That may be so, but the answer is the same. You can disassemble that shellcodeasm program using objdump instead of doing it inside gcc. As you can see, the …