CVS log for src/sys/compat/linux/common/linux_ipc.c

Up to [cvs.NetBSD.org] / src / sys / compat / linux / common

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Mostly merge changes from HEAD upto 20200411

Pull up the following, requested by christos in ticket #1720:

	sys/compat/common/kern_sig_43.c				1.36
	sys/compat/linux/arch/amd64/linux_machdep.c		1.59
	sys/compat/linux/common/linux_fcntl.h			1.18
	sys/compat/linux/common/linux_file64.c			1.62
	sys/compat/linux/common/linux_ipc.c			1.57
	sys/compat/linux/common/linux_misc.c			1.243
	sys/compat/linux/common/linux_signal.c			1.81
	sys/compat/linux/common/linux_socket.c			1.149 (patch)
	sys/compat/linux/common/linux_socket.h			1.24
	sys/compat/linux/common/linux_statfs.h			1.7
	sys/compat/linux/common/linux_termios.c			1.38
	sys/compat/linux/common/linux_termios.h			1.22
	sys/compat/linux32/common/linux32_dirent.c		1.20
	sys/compat/linux32/common/linux32_ioctl.c		1.14
	sys/compat/linux32/common/linux32_misc.c		1.27
	sys/compat/linux32/common/linux32_signal.c		1.20
	sys/compat/linux32/common/linux32_sysinfo.c		1.8
	sys/compat/linux32/common/linux32_termios.c		1.15
	sys/compat/linux32/common/linux32_utsname.c		1.10
	sys/compat/netbsd32/netbsd32_compat_20.c		1.39
	sys/compat/netbsd32/netbsd32_compat_43.c		1.59
	sys/compat/netbsd32/netbsd32_compat_50.c		1.44
	sys/compat/ossaudio/ossaudio.c				1.75
	sys/kern/sysv_shm.c					1.138
	sys/miscfs/procfs/procfs_linux.c			1.75 (patch)
	sys/sys/shm.h						1.54 (patch)

Fix various info leaks, out of bound access, usage of uninitialized
values and direct access to userland variables from kernel space
and memory leaks in system calls implemented for the compatibility
subsystems.

Pull up the following, requested by christos in ticket #1720:

	sys/compat/common/kern_sig_43.c				1.36
	sys/compat/linux/arch/amd64/linux_machdep.c		1.59
	sys/compat/linux/common/linux_fcntl.h			1.18
	sys/compat/linux/common/linux_file64.c			1.62
	sys/compat/linux/common/linux_ipc.c			1.57
	sys/compat/linux/common/linux_misc.c			1.243
	sys/compat/linux/common/linux_signal.c			1.81
	sys/compat/linux/common/linux_socket.c			1.149 (patch)
	sys/compat/linux/common/linux_socket.h			1.24
	sys/compat/linux/common/linux_statfs.h			1.7
	sys/compat/linux/common/linux_termios.c			1.38
	sys/compat/linux/common/linux_termios.h			1.22
	sys/compat/linux32/common/linux32_dirent.c		1.20
	sys/compat/linux32/common/linux32_ioctl.c		1.14
	sys/compat/linux32/common/linux32_misc.c		1.27
	sys/compat/linux32/common/linux32_signal.c		1.20
	sys/compat/linux32/common/linux32_sysinfo.c		1.8
	sys/compat/linux32/common/linux32_termios.c		1.15
	sys/compat/linux32/common/linux32_utsname.c		1.10
	sys/compat/netbsd32/netbsd32_compat_20.c		1.39
	sys/compat/netbsd32/netbsd32_compat_43.c		1.59
	sys/compat/netbsd32/netbsd32_compat_50.c		1.44
	sys/compat/ossaudio/ossaudio.c				1.75
	sys/kern/sysv_shm.c					1.138
	sys/miscfs/procfs/procfs_linux.c			1.75 (patch)
	sys/sys/shm.h						1.54 (patch)

Fix various info leaks, out of bound access, usage of uninitialized
values and direct access to userland variables from kernel space
and memory leaks in system calls implemented for the compatibility
subsystems.

Pull up the following, requested by christos in ticket #1487:

	sys/compat/common/kern_sig_43.c				1.36
	sys/compat/linux/arch/amd64/linux_machdep.c		1.59
	sys/compat/linux/common/linux_fcntl.h			1.18
	sys/compat/linux/common/linux_file64.c			1.62
	sys/compat/linux/common/linux_ipc.c			1.57
	sys/compat/linux/common/linux_misc.c			1.243
	sys/compat/linux/common/linux_signal.c			1.81
	sys/compat/linux/common/linux_socket.c			1.149
	sys/compat/linux/common/linux_socket.h			1.24
	sys/compat/linux/common/linux_statfs.h			1.7
	sys/compat/linux/common/linux_termios.c			1.38
	sys/compat/linux/common/linux_termios.h			1.22
	sys/compat/linux32/common/linux32_dirent.c		1.20
	sys/compat/linux32/common/linux32_ioctl.c		1.14
	sys/compat/linux32/common/linux32_misc.c		1.27
	sys/compat/linux32/common/linux32_signal.c		1.20
	sys/compat/linux32/common/linux32_sysinfo.c		1.8
	sys/compat/linux32/common/linux32_termios.c		1.15
	sys/compat/linux32/common/linux32_utsname.c		1.10
	sys/compat/netbsd32/netbsd32_compat_20.c		1.39
	sys/compat/netbsd32/netbsd32_compat_43.c		1.59
	sys/compat/netbsd32/netbsd32_compat_50.c		1.44
	sys/compat/ossaudio/ossaudio.c				1.75
	sys/kern/sysv_shm.c					1.138
	sys/miscfs/procfs/procfs_linux.c			1.75 (patch)
	sys/sys/shm.h						1.54

Fix various info leaks, out of bound access, usage of uninitialized
values and direct access to userland variables from kernel space
and memory leaks in system calls implemented for the compatibility
subsystems.

Pull up following revision(s) (requested by maxv in ticket #194):

	sys/compat/linux/common/linux_socket.c: revision 1.146
	sys/compat/linux/common/linux_socket.c: revision 1.147
	sys/compat/linux/common/linux_socket.c: revision 1.148
	sys/compat/linux/common/linux_socket.c: revision 1.149
	sys/compat/linux/arch/amd64/linux_machdep.c: revision 1.59
	sys/compat/linux32/common/linux32_sysinfo.c: revision 1.8
	sys/kern/sysv_shm.c: revision 1.138
	sys/compat/linux/common/linux_file64.c: revision 1.61
	sys/compat/linux/common/linux_file64.c: revision 1.62
	sys/compat/netbsd32/netbsd32_compat_43.c: revision 1.58
	sys/compat/linux32/common/linux32_dirent.c: revision 1.20
	sys/compat/linux32/common/linux32_utsname.c: revision 1.10
	sys/compat/linux/common/linux_termios.h: revision 1.22
	sys/compat/linux32/common/linux32_termios.c: revision 1.15
	sys/compat/linux32/common/linux32_misc.c: revision 1.27
	sys/compat/linux32/common/linux32_ioctl.c: revision 1.14
	sys/compat/linux/common/linux_statfs.h: revision 1.7
	sys/compat/linux/common/linux_ipc.c: revision 1.57
	sys/compat/linux/common/linux_fcntl.h: revision 1.18
	sys/compat/linux/common/linux_socket.h: revision 1.24
	sys/sys/shm.h: revision 1.54
	sys/compat/ossaudio/ossaudio.c: revision 1.75
	sys/compat/linux32/common/linux32_signal.c: revision 1.20
	sys/miscfs/procfs/procfs_linux.c: revision 1.75
	sys/compat/linux/common/linux_signal.c: revision 1.81
	sys/compat/linux/common/linux_termios.c: revision 1.38
	sys/compat/linux/common/linux_misc.c: revision 1.241
	sys/compat/linux/common/linux_misc.c: revision 1.242
	sys/compat/linux/common/linux_misc.c: revision 1.243
	sys/compat/linux/common/linux_misc.c: revision 1.244

Fix info leaks.

Fix stupid bugs in linux_sys_shmctl(): the index could be out of bound
(page fault) and there was no proper locking.
Maybe we should just remove LINUX_SHM_STAT, like compat_linux32.

Remove printf.

When dealing with an unknown value, set -1, to prevent (harmless)
uninitialized accesses later.

Add a default case, don't call sys_ioctl() with an uninitialized 'com'
argument.

Fix error handling, returns an errno, not -1.

Put the printf under DEBUG_LINUX.


Hum, don't forget the 'pid' argument, otherwise we're not gonna go very
far.

Don't read data from userland directly. This simply does not work on any
recent x86 CPU (thanks to SMAP) and all architectures that forbid direct
access to userland from the kernel. But I guess no one noticed because no
one ever uses compat_linux, right?

Hum, don't pass an mbuf to realloc(). Inspired from copyin32_msg_control().

Fix memory leak.

I don't see the point in having this useless printf, but add a '\n' to it,
so that it at least displays useless stuff correctly.

Hum, remove incorrect assignment. Userland could have passed a smaller
namelen, and the uninitialized bytes from sb_data were being used later in
the network stack.

Fix stupid bugs in linux_sys_shmctl(): the index could be out of bound
(page fault) and there was no proper locking.

Maybe we should just remove LINUX_SHM_STAT, like compat_linux32.

Sync with HEAD

Pull up following revision(s) (requested by mrg in ticket #1679):
	sys/compat/sys/ipc.h: revision 1.6
	sys/compat/sys/ipc.h: revision 1.7
	sys/compat/sys/shm.h: revision 1.8
	sys/kern/sysv_shm.c: revision 1.133
	sys/compat/sys/sem.h: revision 1.7
	sys/compat/linux/common/linux_ipc.c: revision 1.56
	sys/compat/netbsd32/netbsd32_conv.h: revision 1.38
	sys/kern/sysv_sem.c: revision 1.96
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.28
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.29
	sys/compat/linux32/common/linux32_ipccall.c: revision 1.12
	sys/kern/sysv_msg.c: revision 1.73
	sys/compat/sys/msg.h: revision 1.6

for sysv ipc stat operations, explicitly copy the exported parts
instead of the whole ds structure.
besides triggering a recently added assert in netbsd32, this stops
exposing kernel addresses.

copy the mode clamping to 0777 from sem to shm and msg.

while here, make sure that the compat callers to sysv_ipc clear
the contents of the compat structure before setting the result
members to ensure padding bytes are cleared.

don't set/copy _sem_base, _msg_first, _msg_last or _shm_internal.
even if used, which seems very dodgy, they leak KVAs as well.
possibly this may affect linux binaries, in particular, the
comments around _shm_internal ("XXX Oh well.") may mean apps
rely upon these but hopefully not -- the comments date back to
rev 1.1 in 1995.

the _key, _seq and _msg_cbytes members are exported as before as
i found multiple consumers of these (no less than ipcs(1), and
they appear to be useful for debugging and more.

XXX: the naming of compat functions have too many styles.  there
     are at least 3 different ones changed here.

fix naming errors in previous.  (this file is no longer compiled, but
this fix makes the pull up more obvious, before deleting this file.)

include libkern.h or strings.h.  should fix i386 build issues.

Pull up following revision(s) (requested by mrg in ticket #1679):
	sys/compat/sys/ipc.h: revision 1.6
	sys/compat/sys/ipc.h: revision 1.7
	sys/compat/sys/shm.h: revision 1.8
	sys/kern/sysv_shm.c: revision 1.133
	sys/compat/sys/sem.h: revision 1.7
	sys/compat/linux/common/linux_ipc.c: revision 1.56
	sys/compat/netbsd32/netbsd32_conv.h: revision 1.38
	sys/kern/sysv_sem.c: revision 1.96
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.28
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.29
	sys/compat/linux32/common/linux32_ipccall.c: revision 1.12
	sys/kern/sysv_msg.c: revision 1.73
	sys/compat/sys/msg.h: revision 1.6

for sysv ipc stat operations, explicitly copy the exported parts
instead of the whole ds structure.
besides triggering a recently added assert in netbsd32, this stops
exposing kernel addresses.

copy the mode clamping to 0777 from sem to shm and msg.

while here, make sure that the compat callers to sysv_ipc clear
the contents of the compat structure before setting the result
members to ensure padding bytes are cleared.

don't set/copy _sem_base, _msg_first, _msg_last or _shm_internal.
even if used, which seems very dodgy, they leak KVAs as well.
possibly this may affect linux binaries, in particular, the
comments around _shm_internal ("XXX Oh well.") may mean apps
rely upon these but hopefully not -- the comments date back to
rev 1.1 in 1995.

the _key, _seq and _msg_cbytes members are exported as before as
i found multiple consumers of these (no less than ipcs(1), and
they appear to be useful for debugging and more.

XXX: the naming of compat functions have too many styles.  there
     are at least 3 different ones changed here.

fix naming errors in previous.  (this file is no longer compiled, but
this fix makes the pull up more obvious, before deleting this file.)

include libkern.h or strings.h.  should fix i386 build issues.

Pull up following revision(s) (requested by mrg in ticket #1679):
	sys/compat/sys/ipc.h: revision 1.6
	sys/compat/sys/ipc.h: revision 1.7
	sys/compat/sys/shm.h: revision 1.8
	sys/kern/sysv_shm.c: revision 1.133
	sys/compat/sys/sem.h: revision 1.7
	sys/compat/linux/common/linux_ipc.c: revision 1.56
	sys/compat/netbsd32/netbsd32_conv.h: revision 1.38
	sys/kern/sysv_sem.c: revision 1.96
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.28
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.29
	sys/compat/linux32/common/linux32_ipccall.c: revision 1.12
	sys/kern/sysv_msg.c: revision 1.73
	sys/compat/sys/msg.h: revision 1.6

for sysv ipc stat operations, explicitly copy the exported parts
instead of the whole ds structure.
besides triggering a recently added assert in netbsd32, this stops
exposing kernel addresses.

copy the mode clamping to 0777 from sem to shm and msg.

while here, make sure that the compat callers to sysv_ipc clear
the contents of the compat structure before setting the result
members to ensure padding bytes are cleared.

don't set/copy _sem_base, _msg_first, _msg_last or _shm_internal.
even if used, which seems very dodgy, they leak KVAs as well.
possibly this may affect linux binaries, in particular, the
comments around _shm_internal ("XXX Oh well.") may mean apps
rely upon these but hopefully not -- the comments date back to
rev 1.1 in 1995.

the _key, _seq and _msg_cbytes members are exported as before as
i found multiple consumers of these (no less than ipcs(1), and
they appear to be useful for debugging and more.

XXX: the naming of compat functions have too many styles.  there
     are at least 3 different ones changed here.

fix naming errors in previous.  (this file is no longer compiled, but
this fix makes the pull up more obvious, before deleting this file.)

include libkern.h or strings.h.  should fix i386 build issues.

Pull up following revision(s) (requested by mrg in ticket #1195):
	sys/compat/sys/ipc.h: revision 1.6
	sys/compat/sys/ipc.h: revision 1.7
	sys/compat/sys/shm.h: revision 1.8
	sys/kern/sysv_shm.c: revision 1.133
	sys/compat/sys/sem.h: revision 1.7
	sys/compat/linux/common/linux_ipc.c: revision 1.56
	sys/compat/netbsd32/netbsd32_conv.h: revision 1.38
	sys/kern/sysv_sem.c: revision 1.96
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.28
	sys/compat/netbsd32/netbsd32_compat_14.c: revision 1.29
	sys/compat/linux32/common/linux32_ipccall.c: revision 1.12
	sys/kern/sysv_msg.c: revision 1.73
	sys/compat/sys/msg.h: revision 1.6

for sysv ipc stat operations, explicitly copy the exported parts
instead of the whole ds structure.
besides triggering a recently added assert in netbsd32, this stops
exposing kernel addresses.

copy the mode clamping to 0777 from sem to shm and msg.

while here, make sure that the compat callers to sysv_ipc clear
the contents of the compat structure before setting the result
members to ensure padding bytes are cleared.

don't set/copy _sem_base, _msg_first, _msg_last or _shm_internal.
even if used, which seems very dodgy, they leak KVAs as well.
possibly this may affect linux binaries, in particular, the
comments around _shm_internal ("XXX Oh well.") may mean apps
rely upon these but hopefully not -- the comments date back to
rev 1.1 in 1995.

the _key, _seq and _msg_cbytes members are exported as before as
i found multiple consumers of these (no less than ipcs(1), and
they appear to be useful for debugging and more.

XXX: the naming of compat functions have too many styles.  there
     are at least 3 different ones changed here.

fix naming errors in previous.  (this file is no longer compiled, but
this fix makes the pull up more obvious, before deleting this file.)

include libkern.h or strings.h.  should fix i386 build issues.

for sysv ipc stat operations, explicitly copy the exported parts
instead of the whole ds structure.

besides triggering a recently added assert in netbsd32, this stops
exposing kernel addresses.

copy the mode clamping to 0777 from sem to shm and msg.


while here, make sure that the compat callers to sysv_ipc clear
the contents of the compat structure before setting the result
members to ensure padding bytes are cleared.

don't set/copy _sem_base, _msg_first, _msg_last or _shm_internal.
even if used, which seems very dodgy, they leak KVAs as well.
possibly this may affect linux binaries, in particular, the
comments around _shm_internal ("XXX Oh well.") may mean apps
rely upon these but hopefully not -- the comments date back to
rev 1.1 in 1995.

the _key, _seq and _msg_cbytes members are exported as before as
i found multiple consumers of these (no less than ipcs(1), and
they appear to be useful for debugging and more.


XXX: the naming of compat functions have too many styles.  there
     are at least 3 different ones changed here.

Sync with HEAD.

sync with head

Fix typo in a comment.

sync with head

Make sure to never leak padding space before copyout or copyin
uninitialized fields by explicitly using memset in the conversion
routines.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

Add IPC_64 support for all semctl(2)/msgctl(2). Needed, at least on
i386 for Linux 2.6 emulation.

Sync with HEAD.

Add IPC_64 support for all shmctl(2) commands, not only for STAT/SET.
This make it work on i386 under 2.6 emulation.

Sync w/ -current. 34 merge conflicts to follow.

sync with head

Sync with HEAD.

Add IPC_64 support to msgctl, needed for amd64.

sync with head.

sync with head.

Per discussion with ad, remove most of the #include <sys/sa.h> lines
as they were including sa.h just for the type(s) needed for syscallargs.h.

Instead, create a new file, sys/satypes.h, which contains just the
types needed for syscallargs.h. Yes, there's only one now, but that
may change and it's probably more likely to change if it'd be difficult
to handle. :-)

Per discussion with matt at n dot o, add an include of satypes.h to
sigtypes.h. Upcall handlers are kinda signal handlers, and signalling
is the header file that's already included for syscallargs.h that
closest matches SA.

This shaves about 3000 lines off of the diff of the branch relative
to the base. That also represents about 18% of the total before this
checkin.

I think this reduction is very good thing.

Initial checkin of re-adding SA. Everything except kern_sa.c
compiles in GENERIC for i386. This is still a work-in-progress, but
this checkin covers most of the mechanical work (changing signalling
to be able to accomidate SA's process-wide signalling and re-adding
includes of sys/sa.h and savar.h). Subsequent changes will be much
more interesting.

Also, kern_sa.c has received partial cleanup. There's still more
to do, though.

Remove clause 3 and 4 from TNF licenses

Add IPC_64 support for semctl IPC_STAT/IPC_SET.

Add LINUX_IPC_64 support for LINUX_IPC_SET in shmctl. Required, at
least, for amd64 which use LINUX_IPC_FORCE64.

Rename LINUX_SHMCTL_FORCEIPC64 define to LINUX_IPC_FORCE64.

Remove an obsolete comment about SHM_LOCK/SHM_UNLOCK being no-op.

Remove unneeded amd64 ifdef/endif.

sync with HEAD

Sync with HEAD.

sync with head.

Make shmctl + {IPC,SHM}_STAT work an amd64, by forcing use of IPC_64.
Following the Linux kernel behaviour.

shmctl fixes.

- SHM_STAT take an index as input, and return the corresponding shmid.
- IPC_INFO and SHM_INFO returns the highest used index.
- SHM_INFO expected the total used pages (not bytes) in shm_tot field
  of struct shm_info.

sync with head

sync with HEAD

Sync with HEAD

Sync with head.

Convert all the system call entry points from:
    int foo(struct lwp *l, void *v, register_t *retval)
to:
    int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.

Sync with HEAD.

ANSIfy most of the function definitions in sys/compat (but not ndis).
All by the magic of sed ...

sync with head.

Sync with head.

Sync with head.

Do the sysv ipc calls without the stackgap.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head.

Merge newlock2 to head.

Remove support for SA. Ok core@.

sync with head.

Sync with head.

sync with head.

Jumbo COMPAT_LINUX/COMPAT_LINUX32 bugfix, with the help of Nicolas Joly
- Fix shmat return value on amd64: it uses no black magic with retval[0]
- Fix integer overflows in sysinfo
- Implement sysinfo, mmap2, sched_getparam, sched_getscheduler, mremap,
  and madvise in COMPAT_LINUX32
- Fix improper types used in setgroups16/getgroups16
- Implement mmap2 for COMPAT_LINUX32
- Ifdef debug messages by DEBUG_LINUX

sync with head

sync with head.

The return value for Linux shmat on amd64 does not suffer the same horrible
hack as on i386.

sync with head

Use the LWP cached credentials where sane.

sync with head.

Sync with head.

sync with head.

make linux emulation compile on i386 again.

Add initial (but unfinished) COMPAT_LINUX32 for amd64. This is good enough so
that the i386 license manager part of amd64 version of Fluent works.

While I'm here, add SysV IPC to COMPAT_LINUX/amd64

Sync with head.

More ipc support for linux; makes oracle work. From chuq and
jlrodriguez at terra dot es

sync with -current

sync with head.  xen and whitespace.  xen part is not finished.

Sync with HEAD.

Hi Perry!

nuke trailing whitespace

Sync with HEAD

Pullup rev 1.29 (requested by jdolecek in ticket #884)

Fix linux handling of SysV-style shared memory. Fixed Linux VMware display
problems.

add flag for shmget(2) to specify that later shmat(2) for the shared memory
segment should succeed even if the segment would be marked removed; use this
to implement the Linux-compatible semantics of shmat(2)

this fixes the old Linux VMware3 graphics problem with local display,
and possibly other local Linux X clients using MIT-SHM

fold shmat1() back into sys_shmat(), the change in rev 1.64 is not sufficient
for Linux-compatible shmat() behaviour - shmat() for the removed shared memory
segment must work from all callers, the shared memory id could be passed e.g.
to native X server via MIT-SHM

temporarily remove the functionality, the Linux-compatible semantics
will be reimplemented differently

Merge the nathanw_sa branch.

No longer need to pull in lwp.h; proc.h pulls it in for us.

catch up with -current on kqueue branch

#include <sys/sa.h> before <sys/syscallargs.h>, to provide sa_upcall_t
now that <sys/param.h> doesn't include <sys/sa.h>.

(Behold the Power of Ed)

Catch up to -current.

Use shmat1(), and tell it to find removed segments.

Catch up to -current.
(CVS: It's not just a program. It's an adventure!)

make the stackgap_{init,alloc} functions MP friendly (i.e. pass struct proc *
in, instead of using curproc). While there add an optional size argument to
stackgap_init.

Sync kqueue branch with -current.

Catch up to -current.

don't need <sys/types.h> when including <sys/param.h>

Catch up to -current.

add RCSIDs (including regeneration of files as appropriate)

Catch up to -current.

use _KERNEL_OPT.

Initial commit of scheduler activations and lightweight process support.

Sync with HEAD.

make LKM safe

Update for new msgctl()/semctl()/shmctl() calls.

Sync w/ -current.

Add support for SETALL and GETALL to the Linux emulation of semctl()
and improve handling of SETVAL. Patches supplied by YAMAMOTO Jiro in
PR kern/7621.

Undo previous: Put back opt_sysv.h

Moved opt include to header file.

Defopt SYSVMSG, SYSVSEM and SYSVSHM.

Assign my copyright to TNF. Merge with others were appropriate.
Regen syscall files after script change.

Attempt to fix the mess.

Split compat/linux/linux_ipc.c into common and multi-architechture parts.  The IPC multiplexer and associated functions are now in linux_ipccall.c

Clean this up a bit.

Fixed copyin() argument botch in shmctl() IPC_STAT handling.

Avoid compiler warnings when none of the SYSV* options is defined.

Prototyping changes.

Avoid unnecessary copyin() of shmid_ds struct for shmctl(IPC_RMID)

Prefix names of system call implementation functions with `sys_'.

Make system calls conform to a standard prototype and bring those
prototypes into scope.

Implement the rest of the sysv ipc calls ({sem,msg}*())

Rearrange #includes.

Use compat_util.[ch].

* Changed to use generic ELF code from kern/exec_elf.c (which was taken
  from the svr4 exec code plus the linux compat mods)
* Include file change
* Add multicast sockopts (from John Brezak)

Add missing structure conversion for IPC_RMID.

Added Linux compat code.