On the host, just redirect some random port from the host to guest's port 22 (or whichever port the SSH server is running on, see /etc/ssh/sshd_config) qemu-system-arm.
Login to the guest OS and create a private/public key pair: ssh-keygen -t rsa. Once again, note the device ( mmcblk0p1) and partition ( armhf.img) reflect SD-card usage.
append "root=/dev/mmcblk0p1" -sd armhf.img initrd armhf-extracted/initrd.img-3.2.0-4-vexpress \ kernel armhf-extracted/vmlinuz-3.2.0-4-vexpress \ initrd after-copy/initrd.img-3.2.0-4-versatile \Īnd there you go, play with ARM to your heart's extent! For armhfĮxtract & copy the boot files exactly as before (but for armhf.img) and pass while invoking: qemu-system-arm -m 1024M -M vexpress-a9 \ kernel after-copy/vmlinuz-3.2.0-4-versatile \ Also note that we are now booting from /dev/sda1 because that is where Linux was installed qemu-system-arm -M versatilepb -m 1024M \ Then pass the copied kernel and initrd to qemu-system-img. You need to copy vmlinuz from the installed disk image and pass it again to qemu-system-img WAIT! Apparently, these Debian CD images are not bootable! But Ubuntu's ARM CD image works.
append "root=/dev/ram" -hda armdisk.img -no-rebootĭownload netboot ISO for armhf or armel as needed. kernel vmlinuz-3.2.0-4-versatile -initrd initrd.gz \ NOTE: For creating ARMv6, just pass versatilepb: qemu-system-arm -m 1024M -M versatilepb \
Make sure you install "ssh-server" in tasksel screen. Just proceed with the installation (takes maybe 3 hours or so). This will start a new QEMU window and the Debian installer will kick-in. kernel vmlinuz-3.2.0-4-vexpress -initrd initrd.gz \ qemu-system-arm -m 1024M -sd armdisk.img \ You'll install Debian on on MMC/SD card, that's all it means. Note that we must -sd instead of -sda because vexpress kernel doesn't support PCI SCSI hard disks. In this case, the cpu is arm1176 and machine is versatilepb.Ĭreate a virtual machine with 1024 MB RAM and a Cortex-A9 CPU. You can emulate ARMv6 which Debian calls as armel by downloading the corresponding files for Wheezy armel netboot.
You must download vmlinuz and initrd files for, say Wheezy armhf netboot. This is an ARMv7 CPU which Debian calls as armhf (ARM hard float). In this example, I chose the cortex-a9 CPU and vexpress-a9 machine. You can get a list of all supported machines (to be passed with -M option, see later below): qemu-system-arm -machine help You can get a list of all supported CPUs (to be passed with -cpu option, see later below): qemu-system-arm -cpu help You can then install Debian using an ISO CD or directly from vmlinuz Netboot from vmlinuzįirst, you should decide what CPU and machine type you want to emulate. hello # or qemu-arm-staticĭebugging using GDB Install QEMU sudo apt-get install qemuĬreate a hard disk for your virtual machine with required capacity. If you want a dynamically-linked executable, you've to pass the linker path too: arm-linux-gnueabihf-gcc -ohello hello.c Hello: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, Int main(void) Īrm-linux-gnueabihf-gcc -static -ohello hello.c Then compile your programs in amd64 directly: cat > hello.c Sudo apt-get install gcc-arm-linux-gnueabihf libc6-dev-armhf-cross qemu-arm-static Then install qemu-arm-static so that you can run ARM executables directly on linux # armel packages also exist Running ARM programs under linux (without starting QEMU VM!)įirst, cross-compile user programs with GCC-ARM toolchain. If the below is too much, you can try Ubuntu-ARMv7-Qemu but note it contains non-free blobs.
ARM hasn’t sat idle in the face of such threats: last month it announced a free hardened BIOS as part of a strategy to improve Thing security.You might want to read this to get an introduction to armel vs armhf. Adrian Tang and his co-conspirators found a way past ARM’s TrustZone by watching its power messages. In September, for example, we noted this demonstration at Usenix. Hackers are showing growing interest in ARM-based processors as well, because they’re the dominant architecture in Internet-of-Things products (which have to be lightweight and low-power).
If you're a newbie looking to get into reverse engineering low-level code or practicing on new CPU architectures, these VMs are for you.Įxploits at the firmware level have hit the headlines this year, with most attention directed towards the dominant Intel architecture (such as, for example, Chipzilla’s Intel Management Engine, which shipped without a password, and it turned out, also has an attack path via USB). It's pretty easy to set up a non-x86 virtual machine if you know what you're doing.