Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Remove definition of the GCC3 variable. It was introduced in rev.
1.50 to help out with the GCC 2 to GCC 3 transition and it became
obsolete when C flags compatible with GCC 3.x became the default.
With GCC 4 in the tree this variable (i.e. GCC3) is beyond bogus
because it causes confusion when looking for the newly introduced
WITH_GCC3 option that helps the GCC 3 -> GCC 4 bump.

Revert config(8) version bump. It brings major pain for people working on
different versions of FreeBSD source tree.

Old config(8) can now be used unless you want to use INCLUDE_CONFIG_FILE
option.

Approved by: imp
Reviewed by: imp

Bump config(8) version and build requirement for config(8) to 600006. This
is caused by my latest changes to config(8). You're supposed to install new
config(8) in order to prevent yourself from seeing a warning about old
version of that tool.

You should configure the kernel with a new config(8) then.

Oked by: rwatson, cognet (mentor)

Version 600004 is better than 700000 given other changes that are in
the pipeline. We had to bump the version for 600004 because the old
parser got confused and generated bogus output.

Approved by: ru@

Make config(8) understand ORed dependecies in "files*" and
improve tracking of known devices. Bump config(8) version.

We don't bump the config version for additions to config that aren't
used in the base system. This has been much discussed in the past
(typically people giving me a hard time for it). Since all that was
added to config was nocpu, and since we don't use it, we don't need to
bump the version.

Implement the "nocpu" directive.

Requested by: rwatson

Bump config(8) version for the DEFAULTS change.

Never hardcode /sys into these Makefiles. The proper way to spell it is $S.

Also, move the -I stuff to the centralized kern.pre.mk. However, it
might be better to add these flags to files.conf. This is a short
term fix to fix the broken builds on my machine (I don't have a valid
/sys link).

The latest release of the FreeBSD driver (twa) for
3ware's 9xxx series controllers. This corresponds to
the 9.2 release (for FreeBSD 5.2.1) on the 3ware website.

Highlights of this release are:

1. The driver has been re-architected to use a "Common Layer"
(all tw_cl* files), which is a consolidation of all OS-independent
parts of the driver. The FreeBSD OS specific portions of the
driver go into an "OS Layer" (all tw_osl* files).
This re-architecture is to achieve better maintainability, consistency
of behavior across OS's, and better portability to new OS's (drivers
for new OS's can be written by just adding an OS Layer that's specific
to the OS, by complying to a "Common Layer Programming Interface" API.

2. The driver takes advantage of multiple processors.

3. The driver has a new firmware image bundled, the new features of which
include Online Capacity Expansion and multi-lun support, among others.
More details about 3ware's 9.2 release can be found here:
http://www.3ware.com/download/Escalade9000Series/9.2/9.2_Release_Notes_Web.pdf

Since the Common Layer is used across OS's, the FreeBSD specific include
path for header files (/sys/dev/twa) is not part of the #include pre-processor
directive in any of the source files. For being able to integrate twa into
the kernel despite this, Makefile.<arch> has been changed to add the include
path to CFLAGS.

Reviewed by: scottl

Update version number for latest config version bump

bump the Makefile config versions now that config is 600001...

Forgotten by: des

Kill count device support from config. I've changed the last few
remaining consumers to have the count passed as an option. This is
i4b, pc98/wdc, and coda.

Bump configvers.h from 500013 to 600000.

Remove heuristics that tried to parse "device ed5" as 5 units of the ed
device. This broke things like the snd_emu10k1 device, which required
quotes to make it parse right. The no-longer-needed quotes have been
removed from NOTES, GENERIC etc. eg, I've removed the quotes from:
device snd_maestro
device "snd_maestro3"
device snd_mss

I believe everything will still compile and work after this.

Change required config(8) version.

Revamp of the syscall path, exception and context handling. The
prime objectives are:
o Implement a syscall path based on the epc inststruction (see
sys/ia64/ia64/syscall.s).
o Revisit the places were we need to save and restore registers
and define those contexts in terms of the register sets (see
sys/ia64/include/_regset.h).

Secundairy objectives:
o Remove the requirement to use contigmalloc for kernel stacks.
o Better handling of the high FP registers for SMP systems.
o Switch to the new cpu_switch() and cpu_throw() semantics.
o Add a good unwinder to reconstruct contexts for the rare
cases we need to (see sys/contrib/ia64/libuwx)

Many files are affected by this change. Functionally it boils
down to:
o The EPC syscall doesn't preserve registers it does not need
to preserve and places the arguments differently on the stack.
This affects libc and truss.
o The address of the kernel page directory (kptdir) had to
be unstaticized for use by the nested TLB fault handler.
The name has been changed to ia64_kptdir to avoid conflicts.
The renaming affects libkvm.
o The trapframe only contains the special registers and the
scratch registers. For syscalls using the EPC syscall path
no scratch registers are saved. This affects all places where
the trapframe is accessed. Most notably the unaligned access
handler, the signal delivery code and the debugger.
o Context switching only partly saves the special registers
and the preserved registers. This affects cpu_switch() and
triggered the move to the new semantics, which additionally
affects cpu_throw().
o The high FP registers are either in the PCB or on some
CPU. context switching for them is done lazily. This affects
trap().
o The mcontext has room for all registers, but not all of them
have to be defined in all cases. This mostly affects signal
delivery code now. The *context syscalls are as of yet still
unimplemented.

Many details went into the removal of the requirement to use
contigmalloc for kernel stacks. The details are mostly CPU
specific and limited to exception_save() and exception_restore().
The few places where we create, destroy or switch stacks were
mostly simplified by not having to construct physical addresses
and additionally saving the virtual addresses for later use.

Besides more efficient context saving and restoring, which of
course yields a noticable speedup, this also fixes the dreaded
SMP bootup problem as a side-effect. The details of which are
still not fully understood.

This change includes all the necessary backward compatibility
code to have it handle older userland binaries that use the
break instruction for syscalls. Support for break-based syscalls
has been pessimized in favor of a clean implementation. Due to
the overall better performance of the kernel, this will still
be notived as an improvement if it's noticed at all.

Approved by: re@ (jhb)

Bump the config version to force people to upgrade their config(8)
so the fix for emitting multiple instances of .o files will prevent
link errors on LINT.

Standardize handling of locore.[sS] etc. files.

Submitted by: jake, bde, ru

Build the kernel with -mconstant-gp. This means that function calls,
with the exception of indirect function calls, are assumed to be
intra load module and thus that GP will be the same. This avoids
saving, setting and restoring GP for each function call and
reduces the kernel with ~320KB. There's obviously a performance
benefit as well.

Note that since we generally don't know if calls will be intra or
inter load module when we're compiling kernel modules, -mconstant-gp
cannot be used for modules.

Moved the rule for locore.o from kern.post.mk to Makefile.$ARCH.

Moved the setting of all profiling-related variables except the key one
(PROFLEVEL) to kern.pre.mk so that it is easier to manage. Bumped config
version to match.

Moved the check for cputype being configured to a less bogus place in
mkmakefile.c.

Remove CWARNFLAGS and add GCC3. We handle GCC3.x specific flags
centrally now that we have GCC3 in the tree. The GCC3 variable
is a helper during the switch.

Now that we can thorougly self compile the kernel, stop hard coding the
cross compiler names.

Remove the setting of 'FMT'. We now do ELF by default, so only bother
to increase the lenght of the command line if needed. The setting of FMT
also gets in the cross bootstrapping way for new platforms.

Use the FreeBSD cross tools instead of the linux ones.

Commit some infrastructure for turning on -Werror for kernel compiles.
It doesn't actually do it yet though. This adds a flag to config so
that we can exclude certain vendor files from this even when the rest
of the kernel has it on. make -DNO_WERROR would also bypass all of it.

Proper fix for old config setting maxusers to 8.

Move kern.post.mk to last line, now that it appears safe

Factor the common parts of the Makefile.foo files. This introduces two
new files: kern.pre.mk, which contains most of the definitions, and
kern.post.mk, which contains most of the rules.

I've tested this on i386 and pc98. I have had feedback on the sparc64
port, but no reports from anybody on alpha, ia64 or powerpc. I
appologize in advance if I've broken you.

Reviewed by: jake, jhb, arch@

Only overwrite ${DESTDIR}${KODIR}.old/${KERNEL_KO} if we haven't
booted from it when doing an installkernel.

Only change kern.bootfile from ${DESTDIR}${KODIR}/${KERNEL_KO}
to ${DESTDIR}${KODIR}.old/${KERNEL_KO}, and only when we're renaming
a booted ${DESTDIR}${KODIR}/${KERNEL_KO} kernel.

Use -ffreestanding instead of -fno-builtin. That's the officially blessed
way of saying that its not linking with libc.

Submitted by: peter

Adjust for building with gcc 3.0.1.

Support the "install.debug" and "reinstall.debug" targets for kernel modules.
Small tweaks to kldxref may be necessary to avoid the surprising (but harm-
less) behaviour of 'kldload foo' loading foo.ko.debug instead of foo.ko if
it is present in the kernel directory.

Approved by: a week of silence on -arch
MFC after: 2 weeks

Finish the asbestos suited move of $mach/conf/*.$mach to conf/*.$mach.
Fix some more typos.

Make override of nm consistent across all platforms and sort the overrides.

Reminded by: obrien

Change kern.bootfile when mv'ing the kernel

Not tested by: brian

Allow C++ comments in headers - the EFI headers are full of them.

* Enable dynamically linked kernel. This involves adding a self-relocator
to locore to process the @fptr relocations in the dynamic executable.
* Don't initialise the timer until *after* we install the timecounter to
avoid a race between timecounter initialisation and hardclock.
* Tidy up bootinfo somewhat including adding sanity checks for when the
kernel is loaded without a recognisable bootinfo.

Rename kernel entry point from locorestart to __start.

Enable hardwiring of things like tunables from embedded enironments
that do not start from loader(8).

In order to bring about the end of the universe, delete the lines:
# DO NOT DELETE THIS LINE -- make depend uses it

When building a debugging kernel with modules, build modules with
debugging support as well.

This relies on support added in rev 1.105 to kmod.mk.

Requested by: peter

param.c no longer gets special treatment. Use the source tree version.

Bump config version.

The path in the last commit should have been
src/sys/MACHINE/compile/FOO

Move kernel compile directory from sys/compile/FOO to
sys/compile/${MACHINE}/FOO.

Reviewed by: arch, obrien, peter and
the USENIX terminal room secret kernel cabal

With this commit, I hereby pronounce gensetdefs past its use-by date.

Replace the a.out emulation of 'struct linker_set' with something
a little more flexible. <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set. They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>). Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated. This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by: eivind

Move the -I../../../include or -I/usr/include to the last entry on the
cc arguments. Otherwise ipfilter's bogus #include lines will compile
reference /usr/include/netinet/ip_frag.h etc.

Relocate IPFilter from sys/netinet to sys/contrib/ipfilter.

New files and layout for the ACPI CA 20010518 update.

Add back in the bits to remove any existing "schg" flags as we have
kernel's out in wild that still have these flags set.

Don't install KO's with the "schg" flag.
We are way too inconsistent with our setting of the "schg" flag, and in
our default install, it doesn't really offer any additional security.

Reviewed by: arch@

Ignore chflags errors. This makes installing to nfs mounted target
directories work.

Add support for MODULES_OVERRIDE. This is a list of modules to build
instead of all of them. You can put this in /etc/make.conf or in
makeoptions.

Reviewed by: arch@

# docs to follow.

Restore the careful preservation of .depend (rev 1.78 of Makefile.i386)
that I removed in my last commit dealing with `make depend' bogons.
This commit has some races, but hopefully they are too short to matter.
Unfortuneatly, neither .newdep nor .olddep is removed by `make clean'.

Submitted by: bde

Use CPUTYPE to add appropriate compiler flags to COPTFLAGS for kernel
builds. This may be disabled using the NO_CPU_COPTFLAGS variable.

Reviewed by: arch

Add a 'clobber' target.. Like 'clean' but it takes out even the config
generated stuff, leaving only 'version' in the build dir.

Fix `make depend' => `make kernel-depend'. Using the dependancy file
when rebuilding it is just Wrong.

Improve kernel bootstrapping:
o Use objdump instead of gensetdefs(1) to build the linker sets.
o Allow overriding of nm and objdump in resp. genassym.sh and
gensetdefs.pl for non-native toolchains.

Reviewed by: arch
Perl improvements: Jos Backus <josb@cncdsl.com>, benno

Change the reinstall.debug target to depend on
{kernel,modules}-reinstall.debug rather than {kernel,modules}-reinstall.
Otherwise, the '.debug' portion of the target is lost, and you end up
reinstalling the non debug version instead of the debug version.

Corresponding version bump for config with the DEV_FOO replacement for
the NFOO count option.

Back out the modules `make obj' speedup.
I cannot find a way to do this with the more esoteric source dir schemes
I thought of.

Use the canonical spelling for the path to sys.

Greatly speed up the modules `make obj' phase.

Sync-up so that buils actually work again.

Make the xxxFILES= list generation generic. This makes it easier to add
things like MFILES= or CONFFILES= without having to modify config code.

Fix the `make -jX' (X>1) breakage.

Based on patch submitted by: Makoto MATSUSHITA <matusita@jp.freebsd.org>
Reviewed by: marcel, bde

Add a hook for doing #include magic (for src/tools/tools/kerninclude).

Make it possible to specify profiling in the kernel config file.

Do so for LINT.

Do not prepend `DESTDIR' to `KMODDIR' as sys/conf/kmod.mk already does
that for us.

This is the first snapshot of the FreeBSD/ia64 kernel. This kernel will
not work on any real hardware (or fully work on any simulator). Much more
needs to happen before this is actually functional but its nice to see
the FreeBSD copyright message appear in the ia64 simulator.