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Re: [rb-general] A major milestone in bootstrapping
From: |
Christopher Lemmer Webber |
Subject: |
Re: [rb-general] A major milestone in bootstrapping |
Date: |
Wed, 29 Aug 2018 12:16:00 -0400 |
User-agent: |
mu4e 1.0; emacs 26.1 |
Orians, Jeremiah (DTMB) writes:
>> Interesting... I'm looking at
>> https://github.com/oriansj/M2-Planet/blob/master/seed.M1
>> How was it written? It seems like a monumental task to write all
>> that and keep enough context in one's head! > Then again, I have
>> never written assembly before...
>
> If you'll notice https://github.com/oriansj/M2-Planet/blob/master/seed.M1#L2
>
> It explicitly says it was generated from stage0
> https://savannah.nongnu.org/projects/stage0/
> Specifically cc_x86
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/stage2/cc_x86.s
> Which was built by M0:
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/stage1/M0-macro.hex2
> Which was built by hex2:
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/stage1/stage1_assembler-2.hex1
> Which was built by hex1:
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/stage1/stage1_assembler-1.hex0
> Which was built by hex0:
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/stage1/stage1_assembler-0.hex0
> Which was the 250byte seed used
>
> Well the work started back in 2016 with
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/Linux%20Bootstrap/hex0.s
> and
> http://git.savannah.nongnu.org/cgit/stage0.git/tree/Linux%20Bootstrap/hex0.hex
>
> It was written one function at a time, with the arguments passed in registers
> and careful preservation of everything passed.
>
> - Jeremiah Orians
Ah very interesting! Thanks for the history :)