svn commit: r323554 - head/sys/boot/efi/boot1

[Allan Jude]

On 2017-09-13 13:00, Allan Jude wrote:
> Author: allanjude
> Date: Wed Sep 13 17:00:02 2017
> New Revision: 323554
> URL: https://svnweb.freebsd.org/changeset/base/323554
> 
> Log:
>   Increase EFI boot file size frok 128k to 384k
>   
>   generate_fat.sh does the following:
>   - create an 800kb zero-filled file
>   - create an md device backed by this file
>   - format the device fat12
>   - mount the filesystem
>   - create the EFI ESP directory structure
>   - create the EFI boot file (BOOTx64 for amd64, BOOTaa64 for aarch64, etc)
>   - Adds a marker to the beginning of the file, and pad it to 384kb
>   - 384kb was chosen as it is less than half of 800kb, thus allowing
>     users to keep a backup of their older boot file in the small partition
>   - Unmount the filesystem
>   - Scan the image and find the offset where the marker was inserted
>   - The process requires root, to make image generation easier, images for
>     each architecture are pregenerated, compressed with xz, and checked
>     into svn.
>   
>   The Makefile that generates boot1.efifat does the following:
>   - Ensure the compiled boot1.efi file is no larger than the generated image
>   - Decompress the template created by generate-fat.sh
>   - dd the contents of boot1.efi into boot1.efifat starting at the offset
>     where the marker is found. This allows any file less than the maximum
>     size to be written into the fat filesystem without having to mount it,
>     so no root privileges are required.
>   
>   Later work by imp and myself makes bsdinstall create a 200mb fat16 instead
>   of using this process, but it is retained to make image generation easier.
>   
>   Submitted by:	Eric McCorkle (original version)
>   Reviewed by:	emaste, tsoome, Eric McCorkle
>   MFC after:	1 month
>   Differential Revision:	https://reviews.freebsd.org/D9680
> 
> Added:
>   head/sys/boot/efi/boot1/fat-amd64.tmpl.xz   (contents, props changed)
>   head/sys/boot/efi/boot1/fat-arm.tmpl.xz   (contents, props changed)
>   head/sys/boot/efi/boot1/fat-arm64.tmpl.xz   (contents, props changed)
>   head/sys/boot/efi/boot1/fat-i386.tmpl.xz   (contents, props changed)
> Deleted:
>   head/sys/boot/efi/boot1/fat-amd64.tmpl.bz2.uu
>   head/sys/boot/efi/boot1/fat-arm.tmpl.bz2.uu
>   head/sys/boot/efi/boot1/fat-arm64.tmpl.bz2.uu
>   head/sys/boot/efi/boot1/fat-i386.tmpl.bz2.uu
> Modified:
>   head/sys/boot/efi/boot1/Makefile
>   head/sys/boot/efi/boot1/Makefile.fat
>   head/sys/boot/efi/boot1/generate-fat.sh
> 

I forgot to mention:

I did away with uuencoding the binary files, because svn and git can
handle binary files just fine, and it was just silly.

I switched from bzip to xzip, as we are getting away from using bzip as
a part of the toolchain.


-- 
Allan Jude

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