161 lines
5.3 KiB
Plaintext
161 lines
5.3 KiB
Plaintext
# Copyright (C) 2004, Advanced Micro Devices, Inc. All Rights Reserved
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# Released under the MIT license (see packages/COPYING)
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# Creates a bootable image using syslinux, your kernel and an optional
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# initrd
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#
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# End result is two things:
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#
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# 1. A .hddimage file which is an msdos filesystem containing syslinux, a kernel,
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# an initrd and a rootfs image. These can be written to harddisks directly and
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# also booted on USB flash disks (write them there with dd).
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#
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# 2. A CD .iso image
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# Boot process is that the initrd will boot and process which label was selected
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# in syslinux. Actions based on the label are then performed (e.g. installing to
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# an hdd)
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# External variables
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# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
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# ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
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# ${AUTO_SYSLINUXCFG} - set this to 1 to enable creating an automatic config
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# ${LABELS} - a list of targets for the automatic config
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# ${APPEND} - an override list of append strings for each label
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# ${SYSLINUX_OPTS} - additional options to add to the syslinux file ';' delimited
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do_bootimg[depends] += "dosfstools-native:do_populate_sysroot \
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syslinux:do_populate_sysroot \
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syslinux-native:do_populate_sysroot \
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mtools-native:do_populate_sysroot \
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cdrtools-native:do_populate_sysroot"
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PACKAGES = " "
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EXCLUDE_FROM_WORLD = "1"
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HDDDIR = "${S}/hdd/boot"
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ISODIR = "${S}/cd/isolinux"
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BOOTIMG_VOLUME_ID ?= "boot"
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BOOTIMG_EXTRA_SPACE ?= "512"
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# Get the build_syslinux_cfg() function from the syslinux class
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SYSLINUXCFG = "${HDDDIR}/syslinux.cfg"
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SYSLINUXMENU = "${HDDDIR}/menu"
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inherit syslinux
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build_boot_bin() {
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install -d ${HDDDIR}
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install -m 0644 ${STAGING_DIR_HOST}/kernel/bzImage \
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${HDDDIR}/vmlinuz
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if [ -n "${INITRD}" ] && [ -s "${INITRD}" ]; then
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install -m 0644 ${INITRD} ${HDDDIR}/initrd
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fi
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if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
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install -m 0644 ${ROOTFS} ${HDDDIR}/rootfs.img
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fi
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install -m 444 ${STAGING_LIBDIR}/syslinux/ldlinux.sys ${HDDDIR}/ldlinux.sys
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# Calculate the size required for the final image including the
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# data and filesystem overhead.
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# Sectors: 512 bytes
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# Blocks: 1024 bytes
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# Determine the sector count just for the data
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SECTORS=$(expr $(du --apparent-size -ks ${HDDDIR} | cut -f 1) \* 2)
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# Account for the filesystem overhead. This includes directory
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# entries in the clusters as well as the FAT itself.
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# Assumptions:
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# < 16 entries per directory
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# 8.3 filenames only
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# 32 bytes per dir entry
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DIR_BYTES=$(expr $(find ${HDDDIR} | tail -n +2 | wc -l) \* 32)
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# 32 bytes for every end-of-directory dir entry
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DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${HDDDIR} -type d | tail -n +2 | wc -l) \* 32))
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# 4 bytes per FAT entry per sector of data
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FAT_BYTES=$(expr $SECTORS \* 4)
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# 4 bytes per FAT entry per end-of-cluster list
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FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${HDDDIR} -type d | tail -n +2 | wc -l) \* 4))
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# Use a ceiling function to determine FS overhead in sectors
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DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
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# There are two FATs on the image
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FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
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SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
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# Determine the final size in blocks accounting for some padding
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BLOCKS=$(expr $(expr $SECTORS \* 2) + ${BOOTIMG_EXTRA_SPACE})
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# Ensure total sectors is an integral number of sectors per
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# track or mcopy will complain. Sectors are 512 bytes, and we
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# generate images with 32 sectors per track. This calculation is
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# done in blocks, thus the mod by 16 instead of 32.
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BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))
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IMG=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
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mkdosfs -F 32 -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${IMG} ${BLOCKS}
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# Copy HDDDIR recursively into the image file directly
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mcopy -i ${IMG} -s ${HDDDIR}/* ::/
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syslinux ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
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chmod 644 ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
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cd ${DEPLOY_DIR_IMAGE}
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rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hddimg
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ln -s ${IMAGE_NAME}.hddimg ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hddimg
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#Create an ISO if we have an INITRD
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if [ -n "${INITRD}" ] && [ -s "${INITRD}" ] && [ "${NOISO}" != "1" ] ; then
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install -d ${ISODIR}
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# Install the kernel
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install -m 0644 ${STAGING_DIR_HOST}/kernel/bzImage \
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${ISODIR}/vmlinuz
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# Install the configuration files
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cp ${HDDDIR}/syslinux.cfg ${ISODIR}/isolinux.cfg
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if [ -f ${SYSLINUXMENU} ]; then
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cp ${SYSLINUXMENU} ${ISODIR}
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fi
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install -m 0644 ${INITRD} ${ISODIR}/initrd
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if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
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install -m 0644 ${ROOTFS} ${ISODIR}/rootfs.img
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fi
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# And install the syslinux stuff
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cp ${STAGING_LIBDIR}/syslinux/isolinux.bin ${ISODIR}
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mkisofs -V ${BOOTIMG_VOLUME_ID} \
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-o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.iso \
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-b isolinux/isolinux.bin -c isolinux/boot.cat -r \
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-no-emul-boot -boot-load-size 4 -boot-info-table \
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${S}/cd/
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cd ${DEPLOY_DIR_IMAGE}
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rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.iso
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ln -s ${IMAGE_NAME}.iso ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.iso
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fi
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}
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python do_bootimg() {
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bb.build.exec_func('build_syslinux_cfg', d)
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bb.build.exec_func('build_boot_bin', d)
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}
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addtask bootimg before do_build
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do_bootimg[nostamp] = "1"
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