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On 2021-03-27 23:40, Joshua Kinard wrote: |
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> The MIPS machine has functioning local disk drives, and currently, it |
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> boots fine by just pulling a kernel off my TFTP server and booting |
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> from the local drive, no initramfs needed because I compiled |
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> everything into it. |
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Out of curiosity, if your kernel images already come from the TFTP |
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servers why not simply put separate initramfs files there too? |
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> I wonder if there's a small C program out there that can call |
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> whatever the kernel functions are to mount a disk partition that |
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> could be embedded into a tiny initramfs, then pivot_root to |
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> $REAL_ROOT and run /bin/init? |
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You might be interested in this FOSDEM 2020 talk: |
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https://archive.fosdem.org/2020/schedule/event/ema_boot_linux_only/ |
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Not exactly what you have asked for but the problem they are trying to |
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solve is the same as yours - boot Linux on a system whose first-stage |
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bootloader impose considerable size constraints. And since it uses kexec |
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at its core, it's essentially what Rich has suggested - except it's |
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already been (at least partially) done :-) |
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-- |
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MS |
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