NAME

Proc::Memory - Peek/Poke into processes' address spaces

SYNOPSIS

    use Proc::Memory;

    my $mem = Proc::Memory->new(pid => $$);

    my $byte = $mem->peek(0x1000);
    my $u32  = $mem->read(0x1000, 4);
    $mem->poke(0x1000, 'L') = 12;

DESCRIPTION

PEEK/POKE are a BASIC programming language extension for reading and writing memory at a specified address across process boundaries. This module brings similiar capability to Perl.

Eventually, Memory searching capability will also be added.

IMPLEMENTATION

The module is a Perlish wrapper for Alien::libvas and doesn't expose any extra functionality. libvas claims support for following backends:

    • win32      - Windows API's {Read,Write}ProcessMemory
    • mach       - Mach Virtual Memory API (vm_copy) - macOS and GNU Hurd
    • process_vm - process_vm_{readv, writev} on Linux 3.2+
    • procfs     - /proc/$pid/mem on Linux and some BSDs, /proc/$pid/as on SunOS
    • ptrace     - ptrace(2), available on many Unices
    • memcpy     - Trivial implementation that doesn't supports foreign address spaces

Bug reports and contributions are welcome. :-)

METHODS AND ARGUMENTS

new(pid)

Constructs a new Proc::Memory instance.

peek(addr [, 'pack-string'])

Peeks at the given memory address. pack-string defaults to 'C' (A single byte)

poke(addr [, 'pack-string']) = $value # or = ($a, $b)

Pokes a given memory address. If no pack-string is given, the rvalue is written as is

read(addr, size)

Reads size bytes from given memory address.

write(addr, buf [, count])

Writes buf to addr

tie(addr, 'pack-string')

Returns a tied variable which can be used like any other variable. To be implemented

search('pack-string')

To be implemented when libvas provides it

GIT REPOSITORY

http://github.com/athreef/Proc-Memory

SEE ALSO

libvas Alien::libvas

AUTHOR

Ahmad Fatoum <athreef@cpan.org>, http://a3f.at

COPYRIGHT AND LICENSE

Copyright (C) 2016 Ahmad Fatoum

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.