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authorArd Biesheuvel <ardb@kernel.org>2023-04-18 15:49:50 +0200
committerArd Biesheuvel <ardb@kernel.org>2023-04-20 15:44:35 +0200
commitbca2f3a9406b89961fbc6c92c52c6fc1fd91d35f (patch)
tree3554f33a89364b36b27920fc188bb16e2e894d46 /arch/arm64
parent8358098b9787caab8bbc93fd78d046afaed43c16 (diff)
efi/zboot: Add BSS padding before compression
We don't really care about the size of the decompressed image - what matters is how much space needs to be allocated for the image to execute, and this includes space for BSS that is not part of the loadable image and so it is not accounted for in the decompressed size. So let's add some zero padding to the end of the image: this compresses well, and it ensures that BSS is accounted for, and as a bonus, it will be zeroed before launching the image. Since all architectures that implement support for EFI zboot carry this value in the header in the same location, we can just grab it from the binary that is being compressed. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'arch/arm64')
0 files changed, 0 insertions, 0 deletions