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arm64: Enable CONFIG_COMPAT also for 64k page size 

With binutils 2.25 the default alignment for 32bit arm sections changed to
have everything 64k aligned. Armv7 binaries built with this binutils version
run successfully on an arm64 system.

Since effectively there is now the chance to run armv7 code on arm64 even
with 64k page size, it doesn't make sense to block people from enabling
CONFIG_COMPAT on those configurations.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
hifive-unleashed-5.1
Alexander Graf 2015-03-16 16:32:23 +00:00 committed by Will Deacon
parent 18ccb0cab4
commit a8fcd8b192
1 changed files with 5 additions and 1 deletions
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6
arch/arm64/Kconfig
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@ -674,7 +674,7 @@ source "fs/Kconfig.binfmt"
config COMPAT
bool "Kernel support for 32-bit EL0"
depends on !ARM64_64K_PAGES
depends on !ARM64_64K_PAGES || EXPERT
select COMPAT_BINFMT_ELF
select HAVE_UID16
select OLD_SIGSUSPEND3
@ -685,6 +685,10 @@ config COMPAT
the user helper functions, VFP support and the ptrace interface are
handled appropriately by the kernel.
If you also enabled CONFIG_ARM64_64K_PAGES, please be aware that you
will only be able to execute AArch32 binaries that were compiled with
64k aligned segments.
If you want to execute 32-bit userspace applications, say Y.
config SYSVIPC_COMPAT