Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE
attributes for preloaded modules/images. In particular, MODINFO_ADDR has
the added complexity of not always being relocated properly. Rather than
kluging this in the various components that are affected, we handle it
in a centralized place (preload_fetch_addr()). To that end, expose a new
variable, preload_addr_relocate, that MD initialization code can set and
that turns the address attribute into a valid kernel VA.

Architectures that need the relocation: arm & powerpc (at least).
Components that can utilize this: acpi(4), md(4), fb(4), pci(4), ZFS, geli.

Sponsored by: Juniper Networks

Use ISO C99 integer types in sys/kern where possible.

There are only about 100 occurences of the BSD-specific u_int*_t
datatypes in sys/kern. The ISO C99 integer types are used here more
often.

Use __FBSDID().

Preceed/preceeding are not english words. Use precede and preceding.

Trim unused options (or #ifdef for undoc options).

Submitted by: phk

$Id$ -> $FreeBSD$

Align to sizeof(long) rather than sizeof(int32_t). It needs to be
long because this code is shared with the alpha. I hope the alpha can
read 32 bit ints at 32 bit alignment (vs. 64 bit alignment).

Relocate a few extra addresses that are stored as physical addresses via
the boot loader.

Updates for alignment rounding. XXX this is highly machine dependent and
should probably be moved to i386/i386/link_machdep.c (and the same for the
alpha).
Implement "deleting" a preloaded module by destroying it's tags. This is a
hack. We cannot reuse the data, it's been destroyed by relocation,
statically initialized variables have been modified, etc. Note that to
reclaim the load space is going to be more machine-dependent work.
Implement a relocate hook for machdep.c to call so that the physical
addresses get converted to the equivalent KVM addresses.

Kernel environment access, preloaded module lookup.