I have launched QEMU on p4080 with below options:
root@p4080ds:~# qemu-system-ppc -s -S -enable-kvm -nographic -m 512 -M ppce500 -cpu e500mc -kernel uImage -initrd rootfs.ext2.gz -append "root=/dev/ram rw console=ttyS0,115200"
But don't see kernel come up with it and in order to debug it further, I have attached gdb .
root@p4080ds:~# gdb vmlinux -ex 'target remote localhost:1234'
GNU gdb (GDB) 7.6.2
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "powerpc-fsl-linux".
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Reading symbols from /home/root/vmlinux...done.
Remote debugging using localhost:1234
0x00000000 in ?? ()
(gdb) b kvm_vcpu_ioctl
Breakpoint 1 at 0xc002ce60: file arch/powerpc/kvm/../../../virt/kvm/kvm_main.c, line 1963.
(gdb) p kvm_vcpu_ioctl
Cannot access memory at address 0xc002ce60
But I don't understand what "0x00000000 in ?? ()" & "Cannot access memory at address 0xc002ce60" implies to?