GDBStub Bug: Can't stop at start_kernel when debugging linux kernel

[rockwill]

version: qemu-0.12.3
my environment: arm-linux-gdb + qemu-system-arm + arm926 linux kernel
my operation:
qemu-system-arm -kernel zImage -initrd cramfs.arm.rootfs -s -S
arm-linux-gdb vmlinux
>target remote TCP::1234
>b start_kernel
>c

then qemu start and free run, not stop.
when I pause gdb, qemu stop at rest_init() called by start_kernel()

But if I use qemu-0.11.1 instead of 0.12.3, stopping at start_kernel is all right, and debug action seems allright too,

[rockwill (rockwill)]

what are the differences between version 0.11.1 and 0.12.3 about gdbstub?
Is it a bug in 0.12.3?
Should I configure some option or something for Qemu?
Thank you!

[Prudhvi Surapaneni (prudhvikrishna)]

This problem also exists on qemu-kvm-0.13.0 and qemu-kvm-50 ( dev-builds )

[Peter Maydell (pmaydell)]

This works for me with QEMU 1.1 and GDB 7.4: gdb successfully stops at the start_kernel breakpoint. So I'm going to close it as 'fix released' on the assumption that we fixed the bug at some point between QEMU 0.12 and 1.1...