Your problem here is that you’re trying to run an ARM gdb under QEMU’s user-mode emulation. QEMU doesn’t support the ptrace syscall (that’s what syscall number 26 is), so this is never going to work. What you need to do is run your test binary under QEMU with the QEMU options to enable QEMU’s own … Read more
edu in-tree educational PCI device https://github.com/qemu/qemu/blob/v2.7.0/hw/misc/edu.c https://github.com/qemu/qemu/blob/v2.7.0/docs/specs/edu.txt It is very easy to understand and well documented, so I recommend that you study it. It exposes a minimal PCI device, with basic IO, interrupt generation, and DMA. I’ve written a minimal Linux kernel module + userland tests to play with it at: https://github.com/cirosantilli/linux-kernel-module-cheat/blob/6788a577c394a2fc512d8f3df0806d84dc09f355/rootfs_overlay/pci.sh https://github.com/cirosantilli/linux-kernel-module-cheat/blob/6788a577c394a2fc512d8f3df0806d84dc09f355/kernel_module/pci.c Out-of-tree devices … Read more
I’d try: (gdb) target remote localhost:1234 (gdb) continue Using the ‘-s’ option makes qemu listen on port tcp::1234, which you can connect to as localhost:1234 if you are on the same machine. Qemu’s ‘-S’ option makes Qemu stop execution until you give the continue command. Best thing would probably be to have a look at … Read more
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]