Shulou(Shulou.com)06/02 Report--

1. Compile the kernel

Modify Makefile to-O1 or-O0

Ifdef CONFIG_PROFILE_ALL_BRANCHES

KBUILD_CFLAGS + =-O1 $(call cc-disable-warning,maybe-uninitialized,)

Else

KBUILD_CFLAGS + =-O1

Endif

Modify virtual machine xml file

.

Start the virtual machine

Id=balloon0,bus=pci.0,addr=0x9-S-gdb tcp::1234-msg timestamp=on

Create a directory on the host, and copy the kernel files to be debugged to that directory, such as:

Vmlinuz-4.14.0-generic

Vmlinuz-4.14.0-generic: x86 boot sector

4. Start gdb

Gdb vmlinuz-4.14.0-generic

(gdb) target remote 127.0.0.1 purl 1234

Remote debugging using 127.0.0.1:1234

Compile kvm

1. Enter the directory where kvm is located

Linux-4.14/arch/x86/kvm

two。 Execute compilation command

Make CONFIG_KVM=m CONFIG_INTEL_KVM=m-C / vms/kernel4.14/linux-4.14 M=$PWD modules

The path where the / vms/kernel4.14/linux-4.14 kernel is located

The path where M=$PWD kvm is located

Enter the kernel code directory

Make CONFIG_KVM=m CONFIG_INTEL_KVM=m-C / vms/kernel4.14/linux-4.14 M=/vms/kernel4.14/linux-4.14/arch/x86/kvm modules

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