I ran following commands.
$sudo qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic -append "console=ttys0 nokaslr" -initrd ramdisk.img -m 512 --enable-kvm -cpu 127.0.0.1 -s -S &
[5] 19846
$gdb vmlinux
GNU gdb (Ubuntu 8.1.1-0ubuntu1) 8.1.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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<http://www.gnu.org/software/gdb/documentation/>.
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Type "apropos word" to search for commands related to "word"...
Reading symbols from vmlinux...done.
(gdb) target remote 127.0.0.1:1234
127.0.0.1:1234: Connection timed out.
question from:
https://stackoverflow.com/questions/65877445/i-want-to-debug-kernel-using-gdb-which-printed-connection-timeout-please-help 与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
