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linux-next/arch/arm64
Mark Rutland da57a369d3 arm64: Enable TEXT_OFFSET fuzzing
The arm64 Image header contains a text_offset field which bootloaders
are supposed to read to determine the offset (from a 2MB aligned "start
of memory" per booting.txt) at which to load the kernel. The offset is
not well respected by bootloaders at present, and due to the lack of
variation there is little incentive to support it. This is unfortunate
for the sake of future kernels where we may wish to vary the text offset
(even zeroing it).

This patch adds options to arm64 to enable fuzz-testing of text_offset.
CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET forces the text offset to a random
16-byte aligned value value in the range [0..2MB) upon a build of the
kernel. It is recommended that distribution kernels enable randomization
to test bootloaders such that any compliance issues can be fixed early.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Tom Rini <trini@ti.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-07-10 12:36:58 +01:00
..
boot arm64: dts: Add more serial port nodes in APM X-Gene device tree 2014-06-18 12:41:55 +01:00
configs arm64: defconfig update for LTP 2014-06-18 12:40:52 +01:00
crypto arm64/crypto: improve performance of GHASH algorithm 2014-06-18 12:40:54 +01:00
include arm64: place initial page tables above the kernel 2014-07-10 12:36:12 +01:00
kernel arm64: Enable TEXT_OFFSET fuzzing 2014-07-10 12:36:58 +01:00
kvm - Optimised assembly string/memory routines (based on the AArch64 Cortex 2014-06-06 10:43:28 -07:00
lib arm64: lib: Implement optimized string length routines 2014-05-23 15:17:12 +01:00
mm arm64: place initial page tables above the kernel 2014-07-10 12:36:12 +01:00
xen arm: xen: implement multicall hypercall support. 2014-04-24 13:09:46 +01:00
Kconfig arm64: Add audit support 2014-07-10 11:06:00 +01:00
Kconfig.debug arm64: Enable TEXT_OFFSET fuzzing 2014-07-10 12:36:58 +01:00
Makefile arm64: Enable TEXT_OFFSET fuzzing 2014-07-10 12:36:58 +01:00