关于android中的ramdisk.img及uImage无法包含驱动模块(*.ko)的问题
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这几天一起在整理freescale的imx53的android源码,今天在编译android kernel的时候发现make menuconfig中配置成<M>模式的驱动模块没有加入编译
之前一直是按照原厂的资料运行下面命令编译内核的:
make uImage
通过查看kernel的makefile发些了一些蛛丝马迹,现在将工作笔记记录如下:
在imx_kernel下运行终端,输入如下命令查看kernel编译相关的一些信息
make help
将会看到如下和编译相关的命令和信息
Cleaning targets: clean - Remove most generated files but keep the config and enough build support to build external modules mrproper - Remove all generated files + config + various backup files distclean - mrproper + remove editor backup and patch filesConfiguration targets: config - Update current config utilising a line-oriented program nconfig - Update current config utilising a ncurses menu based program menuconfig - Update current config utilising a menu based program xconfig - Update current config utilising a QT based front-end gconfig - Update current config utilising a GTK based front-end oldconfig - Update current config utilising a provided .config as base localmodconfig - Update current config disabling modules not loaded localyesconfig - Update current config converting local mods to core silentoldconfig - Same as oldconfig, but quietly, additionally update deps randconfig - New config with random answer to all options defconfig - New config with default answer to all options allmodconfig - New config selecting modules when possible allyesconfig - New config where all options are accepted with yes allnoconfig - New config where all options are answered with noOther generic targets: all - Build all targets marked with [*]* vmlinux - Build the bare kernel* modules - Build all modules modules_install - Install all modules to INSTALL_MOD_PATH (default: /) firmware_install- Install all firmware to INSTALL_FW_PATH (default: $(INSTALL_MOD_PATH)/lib/firmware) dir/ - Build all files in dir and below dir/file.[oisS] - Build specified target only dir/file.lst - Build specified mixed source/assembly target only (requires a recent binutils and recent build (System.map)) dir/file.ko - Build module including final link modules_prepare - Set up for building external modules tags/TAGS - Generate tags file for editors cscope - Generate cscope index kernelrelease - Output the release version string kernelversion - Output the version stored in Makefile headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH (default: /data/EN3/freescale/i.MX536/i.MX53-QSB-Android-Release3.3/src/kernel_imx/usr)Static analysers checkstack - Generate a list of stack hogs namespacecheck - Name space analysis on compiled kernel versioncheck - Sanity check on version.h usage includecheck - Check for duplicate included header files export_report - List the usages of all exported symbols headers_check - Sanity check on exported headers headerdep - Detect inclusion cycles in headersKernel packaging: rpm-pkg - Build both source and binary RPM kernel packages binrpm-pkg - Build only the binary kernel package deb-pkg - Build the kernel as an deb package tar-pkg - Build the kernel as an uncompressed tarball targz-pkg - Build the kernel as a gzip compressed tarball tarbz2-pkg - Build the kernel as a bzip2 compressed tarballDocumentation targets: Linux kernel internal documentation in different formats: htmldocs - HTML pdfdocs - PDF psdocs - Postscript xmldocs - XML DocBook mandocs - man pages installmandocs - install man pages generated by mandocs cleandocs - clean all generated DocBook filesArchitecture specific targets (arm):* zImage - Compressed kernel image (arch/arm/boot/zImage) Image - Uncompressed kernel image (arch/arm/boot/Image)* xipImage - XIP kernel image, if configured (arch/arm/boot/xipImage) uImage - U-Boot wrapped zImage bootpImage - Combined zImage and initial RAM disk (supply initrd image via make variable INITRD=<path>) install - Install uncompressed kernel zinstall - Install compressed kernel Install using (your) ~/bin/installkernel or (distribution) /sbin/installkernel or install to $(INSTALL_PATH) and run lilo………………………………………………
可以看到很多编译相关的命令,如:make, make all, make clean, make uImage等等
经过测试发现运行make命令之后,在make menuconfig中配置成<M>的驱动模块都可以加入编译,但是再make uImage生成uImage文件烧到板子上的时候,在目标板上的文件系统里怎么也找不到那些*.ko文件,看了一上午android filesystem相关的资料,总算是找到了解决办法,就是通过修改android生成的ramdisk.img,用脚本把这些*.ko文件导入到android的filesystem中,下面代码就是实现整个过程的脚本:
#!/bin/shMAKE_KERNEL=$1#root dirKERNEL_DIR=$(pwd)#out dirOUT_DIR=${KERNEL_DIR}/../../out#modules install pathRAMDISK_DIR=ramdiskINSTALL_MOD_PATH=${OUT_DIR}/tmp/${RAMDISK_DIR}#echo "make kernel?(y,n)";read MAKE_KERNELecho "******************************"echo "* Make Kernel *"echo "******************************"if [ "$MAKE_KERNEL"x = "n"x ]; thenecho "*** skip ***"elsemake -j4make uImage -j4cp arch/arm/boot/uImage ${OUT_DIR}fiecho "******************************"echo "* Install modules *"echo "******************************"cd ${OUT_DIR}[ -e "tmp" ] || { echo "mkdir tmp"; mkdir tmp; }cp ./ramdisk.img ./tmp#上一次退出状态: 判断ramdisk.img是否存在case "$?" in"0")cd tmpmv ramdisk.img ramdisk.img.gzcd ./${RAMDISK_DIR}gunzip ramdisk.img.gz[ -e "${RAMDISK_DIR}" ] || { echo "mkdir ${RAMDISK_DIR}"; mkdir ${RAMDISK_DIR}; }cd ${RAMDISK_DIR}cpio -i -F ../ramdisk.imgcd ${KERNEL_DIR}make modules_install #重点在这里,在kernel目录下运行此命令时,会把相关的*.ko文件install到由INSTALL_MOD_PATH指定的目录下!!cd ${INSTALL_MOD_PATH}find . | cpio -o -H newc | gzip > ../ramdisk.imgcd ..echo "******************************"echo "* Make uramdisk.img *"echo "******************************"mkimage -A arm -O linux -T ramdisk -C none -a 0x70308000 -n "Android Root Filesystem" -d ./ramdisk.img ./uramdisk.imgmv uramdisk.img ./..cd ..rm -rf ./tmpcd ${KERNEL_DIR}echo "***OKAY***";;"1")echo "ramdisk.img文件不存在!!!!!!"rm -rf ./tmpcd ${KERNEL_DIR};;esac
经过这样的处理就可以向android源码生成的ramdisk.img中install任何我们自己的东西了,把uImage和uramdisk.img一起烧到板子上,通过串口查看,得到了我想要的东西,如下:
lrwxrwxrwx radio radio 2011-07-06 08:58 build -> /data/EN3/freescale/i.MX536/i.MX53-QSB-Android-Release3.3/src/kernel_imx-rw-r--r-- radio radio 81 2011-07-06 08:58 modules.isapnpmap-rw-r--r-- radio radio 74 2011-07-06 08:58 modules.ofmap-rw-r--r-- radio radio 43 2011-07-06 08:58 modules.seriomap-rw-r--r-- radio radio 2908 2011-07-06 08:58 modules.dep.bin-rw-r--r-- radio radio 1671 2011-07-06 08:58 modules.symbols.binlrwxrwxrwx radio radio 2011-07-06 08:58 source -> /data/EN3/freescale/i.MX536/i.MX53-QSB-Android-Release3.3/src/kernel_imx-rw-r--r-- radio radio 141 2011-07-06 08:58 modules.inputmap-rw-r--r-- radio radio 11595 2011-07-06 08:58 modules.builtin-rw-r--r-- radio radio 99 2011-07-06 08:58 modules.pcimap-rw-r--r-- radio radio 1072 2011-07-06 08:58 modules.symbolsdrwxr-xr-x radio radio 2011-07-06 08:58 kernel-rw-r--r-- radio radio 13189 2011-07-06 08:58 modules.builtin.bin-rw-r--r-- radio radio 3795 2011-07-06 08:58 modules.alias.bin-rw-r--r-- radio radio 189 2011-07-06 08:58 modules.usbmap-rw-r--r-- radio radio 1189 2011-07-06 08:58 modules.dep-rw-r--r-- radio radio 4404 2011-07-06 08:58 modules.alias-rw-r--r-- radio radio 1042 2011-07-06 08:58 modules.order-rw-r--r-- radio radio 69 2011-07-06 08:58 modules.ccwmap-rw-r--r-- radio radio 73 2011-07-06 08:58 modules.ieee1394map
相关的*.ko驱动模块就在kernel目录下!
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