arm64: vdso: put vdso datapage in a separate vma

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The VDSO datapage doesn't need to be executable (no code there) or
CoW-able (the kernel writes the page, so a private copy is totally
useless).

This patch moves the datapage into its own VMA, identified as "[vvar]"
in /proc/<pid>/maps.

Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2014-07-09 19:22:11 +01:00 • committed by Catalin Marinas

parent b2f8c07bcb

commit 8715493852

1 changed files with 26 additions and 8 deletions

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arch/arm64/kernel/vdso.c

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