GDB does not stop at assembly code address

Hi there,

I'm currently debugging the 32 bit Linux Kernel 4.8.1 remotely with GDB and Qemu i386 2.7. My GDB script looks like this:

target remote localhost:10000
source .
symbol-file vmlinux
set width 0
set height 0
set verbose off

b rest_init
commands
continue
end

b console_init
commands
continue
end

b start_kernel
commands
continue
end

b startup_32
commands
continue
end

continue

Now apparently I'm missing something, since the breakpoints in C land, that is start_kernel, console_init, rest_init are recognized as breakpoints and thus jumped at by GDB just fine.

What does not work is the breakpoint on startup_32, which is still in Assembly land. GDB just jumps over it as if it wasn't called, but it is definitely called since it's the 32-bit kernel entrypoint.

Is this due to some real-mode/protected-mode fiddlings?

Best regards,
J.