Assembly manipulation and generation

[etherealvisage]

One feature I'd really love to see in Egalito is assembly manipulation, for handling cases when you want to e.g. modify which registers an instruction is referencing or change the opcode from add to or. Another feature that would be really nice is an API for generating assembly from an opcode + registers/memory addresses specification (similar to what XED provides, but integrated with the link/chunk/rewriting support etc in Egalito. Something like this would be lovely:

std::vector<Instruction *> instructions = {
    createInstruction("mov", RegisterOpcodeSpecification(X86PlatformRegister::RAX),
        DereferenceOpcodeSpecification(X86PlatformRegister::RDI)),
    createInstruction("lea", RegisterOpcodeSpecification(X86PlatformRegister::RBX),
        IPRelativeLinkReference(somelink))
};

One problem of course is making this somehow cross-platform... Integrating support for Keystone might be one option?