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efi_loader: Fix section alignment on EFI binaries

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When creating EFI binaries, the alignment of the text section isn't
correctly factored in. As a result trying to load signed EFI binaries
throws an error with:

efi_image_region_add() efi_image_region_add: new region already part of another
Image not authenticated

Running the binary through sbverify has a similar warning
sbverify ./lib/efi_loader/helloworld.efi
warning: gap in section table:
    .text   : 0x00001000 - 0x00001c00,
    .data   : 0x00002000 - 0x00002200,
gaps in the section table may result in different checksums
warning: data remaining[7680 vs 12720]: gaps between PE/COFF sections?
.....

If we include the alignment in the text section, the signed binary boots
fine, and the relevant sbverify warning goes away
sbverify ./lib/efi_loader/helloworld.efi
warning: data remaining[8704 vs 12720]: gaps between PE/COFF sections?
.....

We should look into the remaining warning at some point as well
regarding the gaps between PE/COFF sections.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Ilias Apalodimas
2025-01-16 12:39:05 +01:00
committed by Heinrich Schuchardt
parent 3e4eb3e259
commit 75fe33973c
1 changed files with 1 additions and 1 deletions
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2
arch/arm/lib/elf_aarch64_efi.lds
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@@ -32,9 +32,9 @@ SECTIONS
.rela.plt : { *(.rela.plt) } .rela.plt : { *(.rela.plt) }
.rela.got : { *(.rela.got) } .rela.got : { *(.rela.got) }
.rela.data : { *(.rela.data) *(.rela.data*) } .rela.data : { *(.rela.data) *(.rela.data*) }
. = ALIGN(4096);
_etext = .; _etext = .;
_text_size = . - _text; _text_size = . - _text;
. = ALIGN(4096);
.data : { .data : {
_data = .; _data = .;
*(.sdata) *(.sdata)