交叉编译调试qemu_guest

Winodws版本

编译环境Fedora23

下载VSS SDK的setup.exe

提取VSS SDK头文件

将下面的代码保存成extract-vsssdk-headers.sh脚本，然后放入setup.exe所在的/home/fedora/Downloads目录，然后执行./extract-vsssdk-headers.sh setup.exe

#! /bin/bash

# extract-vsssdk-headers

# Author: Paolo Bonzini <pbonzini@redhat.com>

set -e

if test $# != 1 || ! test -f "$1"; then

  echo 'Usage: extract-vsssdk-headers /path/to/setup.exe' >&2

  exit 1

fi

if ! command -v msiextract > /dev/null; then

  echo 'msiextract not found. Please install msitools.' >&2

  exit 1

fi

if test -e inc; then

  echo '"inc" already exists.' >&2

  exit 1

fi

# Extract .MSI file in the .exe, looking for the OLE compound

# document signature.  Extra data at the end does not matter.

export LC_ALL=C

MAGIC=$'\xd0\xcf\x11\xe0\xa1\xb1\x1a\xe1'

offset=$(grep -abom1 "$MAGIC" "$1" | sed -n 's/:/\n/; P')

tmpdir=$(mktemp -d)

trap 'rm -fr -- "$tmpdir" vsssdk.msi' EXIT HUP INT QUIT ALRM TERM

tail -c +$(($offset+1)) -- "$1" > vsssdk.msi

# Now extract the files.

msiextract -C $tmpdir vsssdk.msi

mv "$tmpdir/Program Files/Microsoft/VSSSDK72/inc" inc

echo 'Extracted SDK headers into "inc" directory.'

exit 0

安装交叉编译依赖

下载qemu源文件

下载地址

安装依赖

32位环境

[fedora@bogon ~]$ rpm -qa|grep mingw32

mingw32-gcc-c++-4.9.2-1.fc21.x86_64

mingw32-SDL-1.2.15-5.fc21.noarch

mingw32-termcap-1.3.1-17.fc21.noarch

mingw32-filesystem-100-1.fc21.noarch

mingw32-glib2-static-2.42.2-1.fc21.noarch

mingw32-winpthreads-4.0.1-1.fc21.noarch

mingw32-binutils-2.25-1.fc21.x86_64

mingw32-win-iconv-0.0.6-2.fc21.noarch

mingw32-gettext-0.18.3.2-2.fc21.noarch

mingw32-gmp-6.0.0-2.fc21.noarch

mingw32-zlib-static-1.2.8-3.fc21.noarch

mingw32-headers-4.0.1-1.fc21.noarch

mingw32-nsis-2.46-13.fc21.x86_64

mingw32-gcc-4.9.2-1.fc21.x86_64

mingw32-zlib-1.2.8-3.fc21.noarch

mingw32-winpthreads-static-4.0.1-1.fc21.noarch

mingw32-gettext-static-0.18.3.2-2.fc21.noarch

mingw32-cpp-4.9.2-1.fc21.x86_64

mingw32-libffi-3.0.13-5.fc21.noarch

mingw32-glib2-2.42.2-1.fc21.noarch

mingw32-crt-4.0.1-1.fc21.noarch

mingw32-pkg-config-0.28-4.fc21.x86_64

mingw32-pixman-0.32.6-1.fc21.noarch

64位环境

[fedora@bogon ~]$ rpm -qa|grep mingw64

mingw64-binutils-2.25-1.fc21.x86_64

mingw64-glib2-2.42.2-1.fc21.noarch

mingw64-crt-4.0.1-1.fc21.noarch

mingw64-win-iconv-0.0.6-2.fc21.noarch

mingw64-gettext-static-0.18.3.2-2.fc21.noarch

mingw64-winpthreads-4.0.1-1.fc21.noarch

mingw64-gcc-4.9.2-1.fc21.x86_64

mingw64-termcap-1.3.1-17.fc21.noarch

mingw64-glib2-static-2.42.2-1.fc21.noarch

mingw64-headers-4.0.1-1.fc21.noarch

mingw64-gcc-c++-4.9.2-1.fc21.x86_64

mingw64-zlib-1.2.8-3.fc21.noarch

mingw64-gettext-0.18.3.2-2.fc21.noarch

mingw64-filesystem-100-1.fc21.noarch

mingw64-pkg-config-0.28-4.fc21.x86_64

mingw64-libffi-3.0.13-5.fc21.noarch

mingw64-zlib-static-1.2.8-3.fc21.noarch

mingw64-cpp-4.9.2-1.fc21.x86_64

mingw64-winpthreads-static-4.0.1-1.fc21.noarch

编译qemu-ga.exe

32位编译指令

cd /home/fedora/Downloads/qemu-2.6.0 && ./configure --enable-guest-agent --cross-prefix=i686-w64-mingw32- --with-vss-sdk=/home/fedora/Downloads && make msi

64位编译指令

cd /home/fedora/Downloads/qemu-2.6.0 && ./configure --enable-guest-agent --cross-prefix=x86_64-w64-mingw32- --with-vss-sdk=/home/fedora/Downloads && make msi

修改虚拟机配置

使用virsh edit 域名编辑配置文件，添加如下内容

<channel type='unix'>

   <source mode='bind' path='/var/lib/libvirt/qemu/f16x86_64.agent'/>

   <target type='virtio' name='org.qemu.guest_agent.0'/>

</channel>

其中path对应的是主机上的文件，虚拟机启动时候自动创建，用于和虚拟机进行通信，文件名不能和其他虚拟机重复，但name为固定值不能修改

安装qemu-ga.exe

qemu-ga.exe只能安装到win7以上版本

标准方法

直接双击msi完成安装

手动手法

安装virtio
在虚拟机中创建C:\Program Files\QEMU\run目录
拷贝qemu-ga.exe、qga-vss.dll、qga-vss.tlb文件到run目录
使用管理员身份在run启动一个控制台，执行qemu-ga.exe –l "C:\Program Files\QEMU\run\log.txt" –s install命令，出现如下字样表示成功

Registering QEMU Guest Agent VSS Provider:

  C:\Program Files\QEMU\run\qga-vss.dll

  C:\Program Files\QEMU\run\qga-vss.tlb

Service was installed successfully

执行net start qemu-ga启动服务，出现如下字样表示成功

QEMU Guest Agent 服务正在启动.

QEMU Guest Agent 服务已经启动成功.

Linux版本

编译环境Fedora23

下载qemu源文件

下载地址

编译qemu-ga

cd /home/fedora/Downloads/qemu-2.6.0 && ./configure --enable-guest-agent && make qemu-ga

修改虚拟机配置

使用virsh edit 域名编辑配置文件，添加如下内容

<channel type='unix'>

   <source mode='bind' path='/var/lib/libvirt/qemu/f16x86_64.agent'/>

   <target type='virtio' name='org.qemu.guest_agent.0'/>

</channel>

其中path对应的是主机上的文件，虚拟机启动时候自动创建，用于和虚拟机进行通信，文件名不能和其他虚拟机重复，但name为固定值不能修改

安装qemu-ga

以下操作在虚拟机中执行

安装virtio
拷贝qemu-ga到/usr/bin目录
拷贝/home/fedora/Downloads/qemu-2.6.0/scripts/qemu-guest-agent/目录下的fsfreeze-hook文件和fsfreeze-hook.d目录到/usr/libexec/qemu-ga/目录
将下面内容保存为qemu-ga文件，并放入/etc/sysconfig/目录

# Transport method may be one of following:

#   * unix-listen

#   * virtio-serial

#   * isa-serial

# Default: virtio-serial

TRANSPORT_METHOD="virtio-serial"

# You also can override the device/socket path

# Default: /dev/virtio-ports/org.qemu.guest_agent.0

DEVPATH="/dev/virtio-ports/org.qemu.guest_agent.0"

# If logfile is unset it defaults to stderr but the daemon

# function of init script redirects stderr to /dev/null

LOGFILE="/var/log/qemu-ga/qemu-ga.log"

# Override pidfile name

# Default: /var/run/qemu-ga.pid

PIDFILE="/var/run/qemu-ga.pid"

# SELinux note:

#  About guest arbitrary file read/write

#

# A new selinux policy is introduced on RHEL-6.4 to deny qemu-ga to

# read/write arbitrary guest files except the device file used to talk

# with host processes, LOGFILE and PIDFILE.

#

# You can disable this policy by "restorecon -R -v /usr/bin/qemu-ga"

# Comma-separated blacklist of RPCs to disable or empty list to enable all

# Tip: You can get the list of RPC commands using `qemu-ga --blacklist ?`

# Default: blank list to enable all RPCs

# Note: There should be no spaces between commas and commands in the blacklist

BLACKLIST_RPC="guest-file-open,guest-file-close,guest-file-read,guest-file-write,guest-file-seek,guest-file-flush"

# Enable fsfreeze hook. See the --fsfreeze-hook option in "qemu-ga --help".

FSFREEZE_HOOK_ENABLE=0

# Set the option argument for --fsfreeze-hook, which is the full pathname of

# the hook script. An empty or unset value designates the default script

# (invoke "qemu-ga --help" to interrogate).

#

# This setting (independently of value) takes effect only when

# FSFREEZE_HOOK_ENABLE is nonzero.

FSFREEZE_HOOK_PATHNAME=/usr/libexec/qemu-ga/fsfreeze-hook

将下面内容保存为qemu-ga文件，并放入/etc/rc.d/init.d/目录

#! /bin/sh

#

# qemu-ga       Start/Stop qemu-ga daemon

#

# chkconfig: 345 30 30

# description: qemu guest agent daemon

# processname: qemu-ga

# Source function library.

. /etc/init.d/functions

# Check that we're a privileged user

[ `id -u` = 0 ] || exit 4

[ -f /etc/sysconfig/qemu-ga ] && . /etc/sysconfig/qemu-ga

prog="qemu-ga"

RETVAL=0

lockfile=/var/lock/subsys/$prog

start() {

    # Check if binary is installed & executable

    [ -f /usr/bin/$prog ] && [ -x /usr/bin/$prog ] || exit 5

    # Check the device/path exists

    [ -n "$DEVPATH" ] && [ -e "$DEVPATH" ] || exit 6

    echo -n $"Starting $prog: "

    ARGS="--daemonize"

    [ ! -z "$TRANSPORT_METHOD" ] && ARGS="$ARGS --method $TRANSPORT_METHOD"

    [ ! -z "$DEVPATH" ] && ARGS="$ARGS --path $DEVPATH"

    [ ! -z "$LOGFILE" ] && ARGS="$ARGS --logfile $LOGFILE"

    [ ! -z "$PIDFILE" ] && ARGS="$ARGS --pidfile $PIDFILE"

    [ ! -z "$BLACKLIST_RPC" ] && ARGS="$ARGS --blacklist $BLACKLIST_RPC"

    if [ "$FSFREEZE_HOOK_ENABLE" -ne 0 ] 2>/dev/null; then

        ARGS="$ARGS --fsfreeze-hook"

        if [ -n "$FSFREEZE_HOOK_PATHNAME" ]; then

            ARGS="$ARGS=$FSFREEZE_HOOK_PATHNAME"

        fi

    fi

    daemon /usr/bin/$prog $ARGS

    RETVAL=$?

    echo

    [ $RETVAL -eq 0 ] && touch $lockfile

    return $RETVAL

}

stop() {

    echo -n $"Stopping $prog: "

    killproc $prog

    RETVAL=$?

    echo

    [ $RETVAL -eq 0 ] && rm -f $lockfile

    return $RETVAL

}

restart() {

    stop

    start

}

# See how we were called.

case "$1" in

  start)

        start

        ;;

  stop)

        stop

        ;;

  status)

        status $prog

        ;;

  restart|reload|force-reload)

        restart

        ;;

  condrestart|try-restart)

        [ -f $lockfile ] && restart || :

        ;;

  *)

        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"

        exit 2

esac

exit $?

执行service qemu-ga start命令启动服务
执行chkconfig qemu-ga on命令设置开机启动

Solaris版本

编译环境Solaris 10

下载qemu源文件

下载地址

需要在solaris系统中进行解压缩，拷贝进去会出现文件名全部变成小写的情况

设置编译环境

步骤	说明	命令
安装pkgutil	一种自动化安装工具，类似CentOS的yum	pkgadd -d http://get.opencsw.org/now
设置bash环境	自动tab补齐	编辑/etc/passwd的root用户的/sbin/sh为/bin/bash
设置编译bash环境	configure使用的bash	将系统自带的/usr/bin/sh保存为/usr/bin/sh.bak，然后建立/usr/bin/sh软链接到/usr/bin/bash
扩展PATH路径	设置pkgutil的可执行路径	拷贝/etc/skel/local.profile为/.profile，然后修改PATH=/usr/bin:/usr/local/bin:/usr/ucb:/etc:/usr/sbin:/opt/csw/bin:/usr/ccs/bin:/usr/sfw/bin:.，最后添加export PS1='\u:\w#'
安装gcc	安装编译器	pkgutil -i gcc5core
安装glib	安装编译器	pkgutil -i glib2_devel_stub

编译qemu-ga

./configure --cc=gcc --install=/usr/ucb/install --target-list= --cpu= --enable-guest-agent --without-pixman --disable-tools --disable-system --disable-fdt && gmake qemu-ga

测试

在主机上执行virsh qemu-agent-command domain_name --cmd '{"execute":"guest-fsfreeze-status"}'命令测试虚拟机中的qemu-ga运行是否正常

调试

Winodws版本

安装mingw32文件系统

[fedora@fedora ~]$ sudo yum -y install mingw32-filesystem.noarch
安装gdb

[fedora@fedora ~]$ sudo yum -y install mingw32-gdb.noarch
到/usr/i686-w64-mingw32/sys-root/mingw/bin/目录下提取gdb相关文件gdb.exe gdbserver.exe libexpat-1.dll zlib1.dll
将gdb相关文件放入qemu-ga.exe所在目录
到服务列表关闭已经启动的qemu相关服务，否则调试的时候会提示failed to initialize guest agent channel
用管理员身份启动cmd，然后切换到qemu-ga.exe所在目录，使用gdb.exe qemu-ga.exe进行调试
先执行run待程序能正常运行后使用ctrl+c暂停程序设置断点，由于没法加载源文件，只能去编译端查看要设置的断点位置，然后使用break filename:line的方式设置断点
或者使用gdbserver.exe 0.0.0.0:2345 qemu-ga.exe开启远程调试，然后在编译端使用gdb qemu-ga.exe开启调试，然后使用target remote guest_ip:2345命令连接远程调试，这个的好处在于能加载编译端本地的源文件