CVS commit: src/sys/arch

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Sun Aug 12 08:17:50 UTC 2018

Modified Files:
        src/sys/arch/amd64/amd64: machdep.c
        src/sys/arch/amd64/include: pmap.h vmparam.h
        src/sys/arch/x86/x86: pmap.c

Log Message:
More ASLR: randomize the kernel main memory. VM_MIN_KERNEL_ADDRESS becomes
variable, and its location is chosen at boot time. There is room for
improvement, since for now we ask for an alignment of NBPD_L4.

This is enabled by default in GENERIC, but not in Xen. Tested extensively
on GENERIC and GENERIC_KASLR, XEN3_DOM0 still boots fine.


To generate a diff of this commit:
cvs rdiff -u -r1.309 -r1.310 src/sys/arch/amd64/amd64/machdep.c
cvs rdiff -u -r1.48 -r1.49 src/sys/arch/amd64/include/pmap.h
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/amd64/include/vmparam.h
cvs rdiff -u -r1.295 -r1.296 src/sys/arch/x86/x86/pmap.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.