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@xxxxxxxxx> 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 > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
