db911ed570
Harry Schmalzbauer reports that some firmware, in his experience, trips over the ESP we install due to the volume label. It has been theorized that this is due to some confusion with the label and the path on the ESP to boot1.efi. Regardless, Harry found that renaming the label seems to fix it. PR: 214282 MFC after: 3 days
80 lines
2.0 KiB
Bash
Executable File
80 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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# This script generates the dummy FAT filesystem used for the EFI boot
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# blocks. It uses newfs_msdos to generate a template filesystem with the
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# relevant interesting files. These are then found by grep, and the offsets
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# written to a Makefile snippet.
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#
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# Because it requires root, and because it is overkill, we do not
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# do this as part of the normal build. If makefs(8) grows workable FAT
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# support, this should be revisited.
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# $FreeBSD$
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FAT_SIZE=1600 #Size in 512-byte blocks of the produced image
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BOOT1_OFFSET=2d
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BOOT1_SIZE=384k
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if [ $(id -u) != 0 ]; then
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echo "${0##*/}: must run as root" >&2
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exit 1
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fi
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# Record maximum boot1 size in bytes
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case $BOOT1_SIZE in
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*k)
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BOOT1_MAXSIZE=$(expr ${BOOT1_SIZE%k} '*' 1024)
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;;
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*)
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BOOT1_MAXSIZE=$BOOT1_SIZE
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;;
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esac
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echo '# This file autogenerated by generate-fat.sh - DO NOT EDIT' > Makefile.fat
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echo "# \$FreeBSD\$" >> Makefile.fat
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echo "BOOT1_OFFSET=0x$BOOT1_OFFSET" >> Makefile.fat
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echo "BOOT1_MAXSIZE=$BOOT1_MAXSIZE" >> Makefile.fat
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while read ARCH FILENAME; do
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# Generate 800K FAT image
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OUTPUT_FILE=fat-${ARCH}.tmpl
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dd if=/dev/zero of=$OUTPUT_FILE bs=512 count=$FAT_SIZE
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DEVICE=`mdconfig -a -f $OUTPUT_FILE`
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newfs_msdos -F 12 -L EFISYS $DEVICE
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mkdir stub
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mount -t msdosfs /dev/$DEVICE stub
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# Create and bless a directory for the boot loader
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mkdir -p stub/efi/boot
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# Make a dummy file for boot1
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echo 'Boot1 START' | dd of=stub/efi/boot/$FILENAME cbs=$BOOT1_SIZE count=1 conv=block
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# Provide a fallback startup.nsh
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echo $FILENAME > stub/efi/boot/startup.nsh
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umount stub
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mdconfig -d -u $DEVICE
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rmdir stub
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# Locate the offset of the fake file
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OFFSET=$(hd $OUTPUT_FILE | grep 'Boot1 START' | cut -f 1 -d ' ')
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# Convert to number of blocks
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OFFSET=$(echo 0x$OFFSET | awk '{printf("%x\n",$1/512);}')
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# Validate the offset
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if [ $OFFSET != $BOOT1_OFFSET ]; then
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echo "Incorrect offset $OFFSET != $BOOT1_OFFSET" >&2
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exit 1
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fi
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xz -f $OUTPUT_FILE
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done <<EOF
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amd64 BOOTx64.efi
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arm64 BOOTaa64.efi
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arm BOOTarm.efi
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i386 BOOTia32.efi
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EOF
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