x86/efi: Include a .bss section within the PE/COFF headers

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The PE/COFF headers currently describe only the initialised-data
portions of the image, and result in no space being allocated for the
uninitialised-data portions.  Consequently, the EFI boot stub will end
up overwriting unexpected areas of memory, with unpredictable results.

Fix by including a .bss section in the PE/COFF headers (functionally
equivalent to the init_size field in the bzImage header).

Signed-off-by: Michael Brown <mbrown@fensystems.co.uk>
Cc: Thomas Bächler <thomas@archlinux.org>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

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Michael Brown 2014-07-10 12:26:20 +01:00 • committed by Matt Fleming

parent 29e2435fd6

commit c7fb93ec51

2 changed files with 52 additions and 12 deletions

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26

arch/x86/boot/header.S

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38

arch/x86/boot/tools/build.c

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