Hi Aruna, Please find the steps below - The kernel needs to be compiled with debugging support, for the same add -g option in KBUILD_CFLAGS and KBUILD_CXXFLAGS. CONFIG_DEBUG_INFO=y make ARCH=i386 menuconfig make ARCH=i386 bzImage -j 5 Now we have compiled the 32 bit binaries Starting the qemu with the kernel image qemu -s -S -kernel arch/x86/boot/bzImage -append "console=ttyS0" -serial mon:stdio -nographic OR qemu -s -S -smp 1,cores=1 -hda /dev/zero -kernel arch/x86/boot/bzImage Debugging using plane gdb $gdb vmlinux (gdb) target remote localhost:1234 (gdb) b start_kernel (gdb) c Regards, Saket Sinha On Sat, Aug 15, 2015 at 7:47 AM, Aruna Hewapathirane <aruna.hewapathirane@gmail.com> wrote:
Hi,
If anyone uses Qemu can someone please show me how to get started ?
I tried :
sudo qemu-system-x86_64 -s -S -kernel arch/x86/boot/bzImage -initrd /boot/initrd.img-4.1.2-vtaqemu+ /dev/zero
And it does allow me to access through gdb using target remote localhost:1234 but when I set a breakpoint in kernel_start and continue it hangs and tells me /bin/sh: can't access tty; job control turned off ?
I am runing a Debian 4.1.2 custom kernel. I have enabled Intel virtulization in the bios. And menuconfig have setup virtualization.
After many tries have finally managed to get this far but now I can use all the help I can get.
And and all suggestions, guidance, *pointers are most welcome.
Thanks - Aruna
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