arm64/scs: Deal with 64-bit relative offsets in FDE frames

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In some cases, the compiler may decide to emit DWARF FDE frames with
64-bit signed fields for the code offset and range fields. This may
happen when using the large code model, for instance, which permits
an executable to be spread out over more than 4 GiB of address space.

Whether this is the case can be inferred from the augmentation data in
the CIE frame, so decode this data before processing the FDE frames.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lore.kernel.org/r/20241106185513.3096442-7-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ard Biesheuvel 2024-11-06 19:55:16 +01:00 • committed by Catalin Marinas

parent ccf54058f5

commit 60de7a647f

1 changed files with 32 additions and 2 deletions

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arch/arm64/kernel/pi/patch-scs.c

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