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tftpboot: compute dtbSize *after* changing dtb

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Adding the reserved-memory node to the dtb can cause it to grow
by enough that it needs an extra page - this will overlap the start
of the kernel image if we calculate offsets based on the original size

Reported-by: sinavir
Authored-by: sinavir
This commit is contained in:
Daniel Barlow 2024-01-26 22:51:58 +00:00
parent c8e3d84bf4
commit 9e199c6957
1 changed files with 3 additions and 2 deletions
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5
modules/outputs/tftpboot.nix
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@ -74,8 +74,6 @@ in {
rootfsSize=$(binsize64k ${o.rootfs} )
rootfsSize=$(($rootfsSize + ${toString cfg.freeSpaceBytes} ))
dtbStart=$(($rootfsStart + $rootfsSize))
dtbSize=$(binsize ${o.dtb} )
imageStart=$(($dtbStart + $dtbSize))
imageSize=$(binsize ${image})
ln -s ${o.manifest} manifest
@ -103,6 +101,9 @@ in {
fdtput -p -t s dtb /reserved-memory/$node compatible phram
fdtput -p -t lx dtb /reserved-memory/$node reg $ac_prefix $(hex $rootfsStart) $sz_prefix $(hex $rootfsSize)
dtbSize=$(binsize ./dtb )
imageStart=$(($dtbStart + $dtbSize))
cmd="liminix ${cmdline} mtdparts=phram0:''${rootfsSize}(rootfs) phram.phram=phram0,''${rootfsStart},''${rootfsSize},${toString config.hardware.flash.eraseBlockSize} root=/dev/mtdblock0";
fdtput -t s dtb /chosen bootargs "$cmd"