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https://codeberg.org/libreboot/lbmk.git
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54291ebb72
Don't directly call a variable. Call a function that checks the variable instead. The new err function also checks whether an exit was actually done, and exits 1 if not. If an exit was done by the given function, but the exit was zero, this is also corrected to perform an exit 1. This fixes a longstanding design flaw of lbmk. Signed-off-by: Leah Rowe <leah@libreboot.org>
67 lines
2.0 KiB
Bash
67 lines
2.0 KiB
Bash
# SPDX-License-Identifier: GPL-2.0-only
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# Logic based on util/chromeos/crosfirmware.sh in coreboot cfc26ce278.
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# Modifications in this version are Copyright 2021, 2023 and 2024 Leah Rowe.
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# Original copyright detailed in repo: https://review.coreboot.org/coreboot/
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eval "`setvars "" MRC_url MRC_url_bkup MRC_hash MRC_board SHELLBALL`"
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extract_mrc()
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{
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extract_shellball
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"$cbfstool" "$appdir/"bios.bin extract -n mrc.bin \
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-f "$_dest" -r RO_SECTION || err "extract_mrc: !$cbfstool $_dest"
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[ -n "$CONFIG_REFCODE_BLOB_FILE" ] && extract_refcode extra; :
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}
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extract_refcode()
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{
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_refdest="${CONFIG_REFCODE_BLOB_FILE##*../}"
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e "$_refdest" f && return 0
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[ $# -lt 1 ] && extract_shellball
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# cbfstool changed the attributes scheme for stage files,
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# incompatible with older versions before coreboot 4.14,
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# so we need coreboot 4.13 cbfstool for certain refcode files
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chkvars cbfstoolref
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mkdir -p "${_refdest%/*}" || err "ref: !mkdir -p ${_refdest%/*}"
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x_ "$cbfstoolref" "$appdir/bios.bin" extract \
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-m x86 -n fallback/refcode -f "$_refdest" -r RO_SECTION
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# enable the Intel GbE device, if told by offset MRC_refcode_gbe
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[ -z "$MRC_refcode_gbe" ] || x_ dd if="config/ifd/hp820g2/1.bin" \
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of="$_refdest" bs=1 seek=$MRC_refcode_gbe count=1 conv=notrunc; :
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}
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extract_shellball()
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{
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chkvars "MRC_board" "CONFIG_MRC_FILE"
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SHELLBALL="chromeos-firmwareupdate-$MRC_board"
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(
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x_ cd "$appdir"
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extract_partition "${MRC_url##*/}"
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extract_archive "$SHELLBALL" .
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) || err "mrc download/extract failure"; :
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}
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extract_partition()
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{
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printf "Extracting ROOT-A partition\n"
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ROOTP=$( printf "unit\nB\nprint\nquit\n" | \
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parted "${1%.zip}" 2>/dev/null | grep "ROOT-A" )
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START=$(( $( echo $ROOTP | cut -f2 -d\ | tr -d "B" ) ))
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SIZE=$(( $( echo $ROOTP | cut -f4 -d\ | tr -d "B" ) ))
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dd if="${1%.zip}" of="root-a.ext2" bs=1024 skip=$(( $START / 1024 )) \
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count=$(( $SIZE / 1024 )) || err "ex dd ${1%.zip}, root-a.ext2"
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printf "cd /usr/sbin\ndump chromeos-firmwareupdate %s\nquit" \
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"$SHELLBALL" | debugfs "root-a.ext2" || err "!extract shellball"
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}
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