编译了linux 5.5.5内核，make menuconfig添加了选项CONFIG_GDB_SCRIPTS并关闭了选项CONFIG _DEBUG_INFO_REREDUCED。运行qemu
qemu-system-x86_64
-kernel arch/x86/boot/bzImage
-append "root=/dev/sda1"
-device virtio-scsi-pci,id=scsi0
-drive file=../../zso2020_cow.qcow2,if=none,id=drive0
-device scsi-hd,bus=scsi0.0,drive=drive0
-enable-kvm
-smp 1
-net nic,model=virtio -net user
-net user,hostfwd=tcp::2222-:22
-m 1G -balloon virtio
-fsdev local,id=hshare,path=$(pwd),security_model=none -device virtio-9p-pci,fsdev=hshare,mount_tag=hshare
-chardev stdio,id=cons,signal=off -device virtio-serial-pci -device virtconsole,chardev=cons
-soundhw hda
-usb -device usb-mouse
-gdb tcp::23308
-display none
-S
Qemu使用编译后的内核运行，这是我在源代码中使用kprint检查过的。然后我运行了
gdb
-ex "add-auto-load-safe-path $(pwd)"
-ex "file vmlinux"
-ex 'target remote localhost:23308'
-ex 'break start_kernel'
-ex 'continue'
(两个脚本都是从编译内核的目录中运行的(
Qemu进入用户登录，gdb输出(等待断点(
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Reading symbols from vmlinux...done.
Remote debugging using localhost:23308
0x000000000000fff0 in exception_stacks ()
Breakpoint 1 at 0xffffffff8271db30: file init/main.c, line 577.
Continuing.
我也试过
hbr代替br首先是
target remote :23308i并设置断点，然后是file vmlinux转到已编译的内核目录并从qemu级别的安装内核
在任何情况下，gdb都不会在断点处停止。
如何正确地使用gdb连接到内核，在哪里查找错误？
问题的解决方案是添加nokaslr选项并使用hbreak。这意味着更换
-append "root=/dev/sda1"
带有
`-append"root=/dev/sda1-nokaslr">
和
break start_kernel
带有
hbreak start_kernel
则CCD_ 10适当地捕获内核断点。