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powerpc: Randomise PIEs

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Randomise ELF_ET_DYN_BASE, which is used when loading position independent
executables.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2009-02-22 01:50:07 +00:00 • committed by Benjamin Herrenschmidt
parent 002b0ec73d
commit 501cb16d3c
2 changed files with 12 additions and 1 deletions
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10
arch/powerpc/kernel/process.c
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@ -1170,3 +1170,13 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
return ret;
}
unsigned long randomize_et_dyn(unsigned long base)
{
unsigned long ret = PAGE_ALIGN(base + brk_rnd());
if (ret < base)
return base;
return ret;
}