Kernel on x86_64 not boot after upgrading Binutils and GCC - linux

Question

I'm not able to see ANY logs on console (even not the "Decompressing Linux... " message).
I enabled any Early Boot prints under Kernel config, at least which I know (see below Kernel configuration)
Tried stopping the Kernel with KDB - by adding kgdbwait at the end of kernel command line arguments in grub
I tried to boot the kernel manually from grub
I tried to add panic() or logs at the function:
asmlinkage void __init start_kernel(void) (init/main.c)
Added / Changed / Removed the loglevel=verbose Kernel command line argument (in GRUB)
Remove "quiet" from Kernel command line argument (in GRUB)
Add crashkernel to Kernel command line argument (in GRUB)
My Questions:
1) Is there other thing I can do to get early boot logs ?
2) Is there any additional code I need to add to Kernel debug it ?
3) Is there any other methodology to debug it ?
Binutils:
2.26.1
binutils-2.26.1-1.fc25.src.rpm
GCC:
6.4.1
gcc-6.4.1-1.fc25.src.rpm
Kernel:
3.10.0-514.21.1
GRUB configuration
default=0
timeout=3
serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
terminal --timeout=34 serial console
title XIV-System
root (hd0,0)
kernel /boot/vmlinuz init=/system/my_init console=tty0 mce=0 i8042.noaux idle=poll scsi_mod.inq_timeout=2 selinux=0 nohpet console=ttyS0,115200 earlyprintk=ttyS0,115200 kgdboc=ttyS0,115200 ro crashkernel=auto
Kernel configuration
- For verbos boot message
CONFIG_X86_VERBOSE_BOOTUP=y
- For early printk
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
- For KGDB
CONFIG_KGDB_LOW_LEVEL_TRAP=y
CONFIG_KGDB_KDB=y
CONFIG_SERIAL_KGDB_NMI=y
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_KGDB=y
CONFIG_KGDB_SERIAL_CONSOLE=y
CONFIG_KGDB_TESTS=y
- For KDB
CONFIG_KDB_KEYBOARD=y
CONFIG_KDB_CONTINUE_CATASTROPHIC=0

Answer 1

I was manage to solve the problem only after debug kernel with gdb (the early boot stage), basically I found out that the kernel fails on:
(gdb) bt
#0 early_idt_handler () at arch/x86/kernel/head_64.S:407
#1 0xffff9fffffffffff in ?? ()
#2 0xffffff07ffffffff in ?? ()
#3 0xffffe0ffffffffff in ?? ()
#4 0x00000e0000000000 in ?? ()
#5 0xffffffff81bee8a0 in ?? ()
#6 0xffff880000014560 in ?? ()
#7 0xffffffff819c0120 in early_idt_handler () at arch/x86/kernel/head_64.S:374
#8 0x0000000000000400 in irq_stack_union ()
#9 0xffffffff81bee8a0 in ?? ()
#10 0x000000000000000f in irq_stack_union ()
#11 0x0000000000000000 in ?? ()
from them I looked into the Kernel source tree (for patch related to head_64.S) and applied it. you can find the patch and it's related on:
commit 5f020130d5360e8266e369dc2b5f4e32ec5b05f4 (HEAD -> my_commit)
Author: Andy Lutomirski <luto#kernel.org>
Date: Fri May 22 16:15:47 2015 -0700