This patch adds support for a usb-redir device, which takes a chardev as a communication channel to an actual usbdevice using the usbredir protocol. None of the boot options work therefore I can't get logs from ReactOS (SCREEN). The qemu stuff works perfectly for me on Debian Jessie x86_64 with the "stock" qemu/kvm 2.It also renames "redir" to "hostfwd" and "channel" to "guestfwd" in order to (hopefully) clarify their meanings. This patch adds a number of new options to "-net user": net (address and mask), host, dhcpstart, dns and smbserver. With the internal IP configuration made more flexible, we can now enhance the user interface. The current status allows booting to user mode with a read only mounted ram disk, to which new executables and launchd items can be added (before boot), and those can use the dyld cache from the main disk image copied to the ram disk and. The -redir is as follows (from the QEMU manual pages):The project is now available at qemu-aleph-git with the required scripts at qemu-scripts-aleph-git. So basically you could ssh localhost -p 8022 and get access to your guest machine. Notice the -redir argument, it specifies that an issue to port 8022 on the outside be mapped to port 22 on the inside (guest). You can just add chardevs, netdevs and blockdevs to the usbredirserver qemu process then. If you just want move usb emulation to a separate process (using the multi-process qemu infrastructure, or using something like "qemu -machine none -device usbredirserver") then no, for the most part it wouldn't be a problem.This post covers how to use QEMU in system mode to create a VM. In the first post, Emulating Embedded Linux Applications with QEMU, we covered some commonly used tools and discussed using QEMU in user-mode to emulate a single binary. This blog is the second post in our Embedded Linux Device Security Research series.
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