Add __setattr__ and __call__ interfaces to ROP for setting registers (closes #1636)

[mariuszskon]

This implements #1636 which introduces the __setattr__ interface for setting registers in ROP, one at a time:

    >>> context.clear(arch='amd64')
    >>> assembly = 'pop rax; pop rdi; pop rsi; ret; pop rax; ret;'
    >>> e = ELF.from_assembly(assembly)
    >>> r = ROP(e)
    >>> r.rax = 0xdead
    >>> r.rdi = 0xbeef
    >>> r.rsi = 0xcafe
    >>> print(r.dump())
    0x0000:       0x10000004 pop rax; ret
    0x0008:           0xdead
    0x0010:       0x10000001 pop rdi; pop rsi; ret
    0x0018:           0xbeef
    0x0020:      b'iaaajaaa' <pad rsi>
    0x0028:       0x10000002 pop rsi; ret
    0x0030:           0xcafe

As discussed, a more flexible __call__ interface has also been implemented:

    >>> context.clear(arch='amd64')
    >>> assembly = 'pop rax; pop rdi; pop rsi; ret; pop rax; ret;'
    >>> e = ELF.from_assembly(assembly)
    >>> r = ROP(e)
    >>> r(rax=0xdead, rdi=0xbeef, rsi=0xcafe)
    >>> print(r.dump())
    0x0000:       0x10000000
    0x0008:           0xdead
    0x0010:           0xbeef
    0x0018:           0xcafe
    >>> r = ROP(e)
    >>> r({'rax': 0xdead, 'rdi': 0xbeef, 'rsi': 0xcafe})
    >>> print(r.dump())
    0x0000:       0x10000000
    0x0008:           0xdead
    0x0010:           0xbeef
    0x0018:           0xcafe

[zachriggle]

Nice!

On Thu, Oct 1, 2020 at 1:08 PM Arusekk ***@***.***> wrote: Merged #1688 <#1688> into dev. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1688 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAA3IGAEEGMFQ7HVMLRKWILSITAQFANCNFSM4R76BT4A> . --

*Zach Riggle*