(I am not sure is this right place to ask, if isn't please excuse me)

Why we can see start_kernel symbol on GDB but not arch/boot/x86/main.c:main ? I mean I want to debug kernel's early boot setup but when I try to insert any hardware breakpoint to boot codes, gdb cannot see symbols except from kernel codes.

$	qemu-system-x86_64 \
		-kernel $LINUX_SOURCE/arch/x86_64/boot/bzImage \
		-append "console=ttyS0 nokaslr earlycon earlyprintk" \
		-initrd $LINUX_SYSROOT/ramdisk.img \
		-m 1024 \
		--enable-kvm \
		-cpu host \
		-s -S &

$ gdb vmlinux
> target remote :1234
> hbreak start_main