Retire env.h

This was a MINIX3-specific header file placed outside of the minix/
header subdirectory, with its definitions duplicated in the more
standard minix/sysutil.h header.

Also make env_pref

Retire env.h

This was a MINIX3-specific header file placed outside of the minix/
header subdirectory, with its definitions duplicated in the more
standard minix/sysutil.h header.

Also make env_prefix(3) take constant pointers.

Change-Id: I243c38eb38e24eb98f0c0dddf7f340e7fec255f4

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RS/VM: proper preparation for multi-VM live update

Due to changed VM internals, more elaborate preparation is required
before a live update with multiple components including VM can take
place. Thi

RS/VM: proper preparation for multi-VM live update

Due to changed VM internals, more elaborate preparation is required
before a live update with multiple components including VM can take
place. This patch adds the essential preparation infrastructure to
VM and adapts RS to make use of it. As a side effect, it is no
longer necessary to supply RS as the last component (if at all)
during the set-up of a multicomponent live update operation.

Change-Id: If069fd3f93f96f9d5433998e4615f861465ef448

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vm: restartability improvements (#1)

Two bugs fixed wrt vm restartability.

. make sure pagetable data is only allocated
using dynamic data instead of static spare pages
(bootstrap pages). Th

vm: restartability improvements (#1)

Two bugs fixed wrt vm restartability.

. make sure pagetable data is only allocated
using dynamic data instead of static spare pages
(bootstrap pages). They are needed for bootstrap
but now repeat some of the initialization so only
dynamic data remains. This solves the problem of
physical addresses changing (as static pages are
re-allocated for the new instance) after update.
. pt_ptalloc has to be specified in bytes instead of
pde slot numbers. leaving pt_pt NULL causes mapping
transfers to fail because NULL happens to be mapped in
then and updates then happen there.
. added some sanity checks against the above happening.

The new state is that VM can update many times, but the system
isn't fully reliable afterwards yet.

Change-Id: I7313602c740cdae8590589132291116ed921aed7

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vm: Fix heap preallocation.

Change-Id: I5b7f6473b9bbff69eae6ab26c889ad8ed902ff3a

vm: Fix vm cloning.

Change-Id: I996410ab1b9628cde797d9e5dd73ed07f13a884b

rs: New RS.

Change-Id: I46e335d5dac49104028d7cb0706b3e85de752bfe

vm: Improve live update support.

Change-Id: I02da3ea32cd05c4ed84a6e199236e5df6e25cb60

vm: Extend the vm_memctl() interface.

Change-Id: I87b7c188bd1fc54a3ec943e7ff1d05c6f4c8a56a

kernel: Extend the {sys,vm}_update() interfaces.

Change-Id: I9ada3c04c08d219b198e9081f4e1942b11c722f6

New sources layout

Change-Id: Ic716f336b7071063997cf5b4dae6d50e0b4631e9