tree 109636972b24ce5625226e8329f88ba3210a5d82
parent b4fc4f605fc66a0942e88f37b3a4b18671e32b0c
author Marc Zyngier <maz@kernel.org> 1591630081 +0100
committer Will Deacon <will@kernel.org> 1591630264 +0100

arm64: Obtain text offset from kernel image

Recent changes made to Linux 5.8 have outlined that kvmtool
hardcodes the text offset instead of reading it from the arm64
image itself.

To address this, import the image header structure into kvmtool
and do the right thing. 32bit guests are still loaded to their
usual locations.

While we're at it, check the image magic and default to the text
offset to be 0x80000 when image_size is 0, as described in the
kernel's booting.rst document.

Reported-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20200608152801.1415902-1-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>