From: Arun Chandran <achandran@mvista.com>
Date: Fri, 10 Oct 2014 11:31:24 +0000 (+0100)
Subject: arm64: ASLR: Don't randomise text when randomise_va_space == 0
X-Git-Tag: fixes-against-v3.18-rc2~7^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92980405f3537136b8e81007a9df576762f49bbb;p=pandora-kernel.git

arm64: ASLR: Don't randomise text when randomise_va_space == 0

When user asks to turn off ASLR by writing "0" to
/proc/sys/kernel/randomize_va_space there should not be
any randomization to mmap base, stack, VDSO, libs, text and heap

Currently arm64 violates this behavior by randomising text.
Fix this by defining a constant ELF_ET_DYN_BASE. The randomisation of
mm->mmap_base is done by setup_new_exec -> arch_pick_mmap_layout ->
mmap_base -> mmap_rnd.

Signed-off-by: Arun Chandran <achandran@mvista.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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