Peter Jones e022441544 Fix Pe.OptHdr.SizeOfImage and SizeOfHeaders ... SizeOfImage is defined as: The size (in bytes) of the image, including all headers, as the image is loaded in memory. It must be a multiple of SectionAlignment. SizeOfHeaders likewise is defined as: The combined size of an MS-DOS stub, PE header, and section headers rounded up to a multiple of FileAlignment. Currently SizeOfImage represents .bss and .text, but it doesn't include .header or .setup, nor any sections we'll add later, and there's nothing enforcing that it matches SectionAlignment. Additionally, since .bss is being set up in our running code and /not/ by the loader, the current value is dangerously high, as in the event there is an error in the section table, it could potentially lead the loader to mark memory allocated at runtime holding user-supplied data by any EFI binary loaded before us as executable. This patch adds a new symbol, _img_end, which is after .text and is rounded up to 4kB (which is also what SectionAlignment is set to). It also adds a local label, anchored with ".org 512", and uses that to set SizeOfHeaders - this will ensure the build fails without outputting and invalid binary if the headers take too much space. Signed-off-by: Peter Jones <pjones@redhat.com>		2023-01-03 00:58:52 +01:00
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ldscripts	Fix Pe.OptHdr.SizeOfImage and SizeOfHeaders	2023-01-03 00:58:52 +01:00
Makefile	Use gcc -x assembler-with-cpp instead of gcc -E --traditional	2023-01-03 00:58:52 +01:00