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| author | Konstantin Belousov <kib@FreeBSD.org> | 2019-07-31 20:23:10 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2019-07-31 20:23:10 +0000 |
| commit | fc83c5a7d0e76ffdd578521d1d4c07415928c068 (patch) | |
| tree | 77523c0d1d22e3463f90b666ada48ddef249558d /stand/powerpc/ofw | |
| parent | 3638455c92650b92741626ba50960567e02a763f (diff) | |
| download | src-fc83c5a7d0e76ffdd578521d1d4c07415928c068.tar.gz src-fc83c5a7d0e76ffdd578521d1d4c07415928c068.zip | |
Make randomized stack gap between strings and pointers to argv/envs.
This effectively makes the stack base on the csu _start entry
randomized.
The gap is enabled if ASLR is for the ABI is enabled, and then
kern.elf{64,32}.aslr.stack_gap specify the max percentage of the
initial stack size that can be wasted for gap. Setting it to zero
disables the gap, and max is capped at 50%.
Only amd64 for now.
Reviewed by: cem, markj
Discussed with: emaste
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D21081
Notes
Notes:
svn path=/head/; revision=350484
Diffstat (limited to 'stand/powerpc/ofw')
0 files changed, 0 insertions, 0 deletions