Rename dup3110 to dup3100 to match historical practice for NetBSD-11,
because we already have kevent100. Fix compat_dup3 to belong in compat_100
not compat_110.

version dup3

COMPAT_NETBSD32: Add support for memfd_create(2).

netbsd32_netbsd: Sort headers. No binary changes.

Add the eventfd(2) system call to COMPAT_NETBSD32.

The read/write/send/recv system calls return ssize_t because -1 is
returned on error. Therefore we must restrict the lengths of any
buffers to NETBSD32_SSIZE_MAX with compat32 to avoid garbage return
values.

Fixes ATF lib/libc/sys/t_write:write_err.

Remove unused LIMITCHECK() macro (now contained in netbsd32_rlimit.c).

branches: 1.230.2;
Teach about getrandom(2) to COMPAT_NETBSD32.

Add ACL support for FFS. From FreeBSD.

branches: 1.228.2;
Add mkfifo{,at}(2) mode in mknod{,at}(2) as requested by POSIX

mknod with mode & S_IFIFO and dev=0 shall behave like mkfifo.

Update the documentation to reflect this state.

Add ATF tests.

This is an in-kernel implementation as typically user-space programs use
mkfifo(2) directly, however whenever there is need to bypass libc (like in
valgrind) then portable POSIX software calls the mknod syscall.

Noted on tech-kern@ by Greg Troxel.

Drop unused retval pointer from do_sys_mknod{,at}()

No functional change intended.

sort -u opt_ to remove dup.

Add options for quota.

Include opt_quota.h

Fixes (at least) the amd64 build.

Merge the [pgoyette-compat] branch

move mmap(), compat 40 mount(), pipe() and getfh() into their own files
as the implementation is non trivial or is compat. mark old mount()
properly instead of manually #if'ing ito to ENOSYS.

move rlimit and quota code into their own modules.

(netbsd32_netbsd.c should have only simple shims. anything more
than copying arguments from one args struct to the other should
not be placed in this file. still a couple more to move out.)

fix style consistency.
remove obsolete comments or commented code.
NFC.

pset_create() takes a pointer so it needs special handling.

Allow syscall_establish() to install new syscalls when the existing
entry-point is either sys_nomodule or sys_nosys. Update the
makesyscalls.sh script to create a const array of bits to allow
syscall_disestablish() to properly restore the original entry-point.
Update all the initializers of struct emul to initialize the pointer
to the bit array struct emul.

XXX Regen of all files created by makesyscalls.sh will come soon,
XXX followed by a kernel version bump (since struct emul is being
XXX modified).

This commit should address PR kern/45781 and also removes the need
for the work-around for that PR in file

sys/arch/usermode/modules/syscallemu/syscallemu.c

Add getsockopt2().

branches: 1.216.2;
Remove an element from struct emul: e_tracesig

e_tracesig used to be implemented for Darwin compat. Nowadays the Darwin
compatiblity layer is gone and there are no other users.

This functionality isn't used where it shall be used in the existing
codebase.

If we want to emulate debugging interfaces in compat layers we would need
to implement that from scratch anyway. We would need to be bug compatible
with other OSes too.

Proposed on tech-kern@.

Welcome to NetBSD 8.99.16!

Sponsored by <The NetBSD Foundation>

Untangle the swapctl compat code mess. Welcome to lucky 13.

branches: 1.214.2;
remove struct emul's e_fault.

It used to be used by COMPAT_IRIX for the purpose of overriding
uvm_fault (only implemented in MIPS), now removed.

Ride 8.99.12 version bump.

Revert vadvise(2) removal

This system call was used in legacy Lisp code, that was inherited to modern
age and still compiled against supported compat layers (e.g. in clisp,
oaklisp, Franz Lisp).

It used to instruct the kernel about paging policy (G/C aware, flush etc).

Newly compiled code (assuming that it will detect vadvise()) will use the
libc stub for vadvise(). The headers for this interface are gone.

vadvise(2) could be marked as COMPAT_80, but as long as we support ultrix,
sunos or aout68k ABI, don't bother with this.

Requested by <mrg>

Refactor pipe1() and correct a bug in sys_pipe2() (SYS_pipe2)

sys_pipe2() returns two integers (values), the 2nd one is a copy of the 2nd
file descriptor that lands in fildes[2]. This is a side effect of reusing
the code for sys_pipe() (SYS_pipe) and not cleaning it up.

The first returned value is (on success) 0.

Introduced a small refactoring in pipe1() that it does not operate over
retval[], but on an array int[2]. A user sets retval[] for pipe() when
desired and needed.

This refactoring touches compat code: netbsd32, linux, linux32.

Before the changes on NetBSD/amd64:

$ ktruss -i ./a.out
[...]
15131 1 a.out pipe2(0x7f7fff2e62b8, 0) = 0, 4
[...]

After the changes:

$ ktruss -i ./a.out
[...]
782 1 a.out pipe2(0x7f7fff97e850, 0) = 0
[...]

There should not be a visible change for current users.

Sponsored by <The NetBSD Foundation>

Drop SYS_vadvise

The (o)vadvise syscall is dummy since the beginning of NetBSD.

It is an obsolete remnant from the old UNIX.

Sponsored by <The NetBSD Foundation>

Drop SYS_sbrk

sbrk - change data segment size

This syscall is dummy since the inception of the project.

Sponsored by <The NetBSD Foundation>

Drop the sstk(2) syscall stub

sstk - change stack section size

This functionality has never been implemented and is a remnant from 16-bit
UNIX. This stub appeared with the first NetBSD commit.

Sponsored by <The NetBSD Foundation>

disable 32 bit signal ktrace records; 32 bit traced process produce 64 bit
trace records, the only record that we can't parse is that one :-)
XXX: pullup-8

Remove references to COMPAT_OLDSOCK (itself removed years ago).

branches: 1.206.2;
move MAP_COPY in compat

branches: 1.205.6;
PR kern/51514: ptrace(2) fails for 32-bit process on 64-bit kernel

Updated from the original patch in the PR by me.

deal with not having KTRACE

Allow emulations to override the creation of ktrace records for posting
signals. In compat_netbsd32 use this to write the 32bit version of
the records, so a 32bit userland kdump is happy.

Trailing whitespace

+netbsd32__sched_protect

branches: 1.200.2;
clamp getrlimit the same way we clamp setrlimit

Add missing newline character in error message

This is related to kern/50469.

Adapt to per-emulation syscall_autoload capability (the table of syscalls
that can be autoloaded is currently empty).

Lock before calling uvm_swap_stats(). Otherwise a race condition could
corrupt memory.

Implement trivial conversion for pset_*

Implement posix_fallocate and fdiscard compat

Fix a comment.

branches: 1.193.2; 1.193.4; 1.193.6; 1.193.10;
Just return sys_open(). COMPAT_10 will be handled internally.

ok christos@

Revert the following changes:

src/sys/sys/quotactl.h 1.37
src/sys/compat/netbsd32/netbsd32.h 1.101
src/sys/compat/netbsd32/netbsd32_netbsd.c 1.188, 1.189
src/sys/kern/vfs_quotactl.c 1.39
src/sys/kern/vfs_syscalls.c 1.483
src/sys/ufs/lfs/ulfs_quota.c 1.11
src/sys/ufs/ufs/ufs_quota.c 1.116
src/lib/libquota/quota_kernel.c 1.5

and do them correctly.

If you're going to change the name of something, you need to change
the name of *all* the things with the same name, not just a handful,
and you should change it to something similar so it still matches the
rest of the system rather than just picking an arbitrarily different
name.

Hi, Joerg.

To wit, rename the quotactl "delete" operation to "del", because
"delete" is a reserved word in C++ and for some reason Joerg wants to
run internal interfaces used only by C code through his C++ compiler.
Do not rename it to "remove" instead, because this doesn't match
libquota or the rest of the usage throughout the system; and rename
all the related identifiers, not just the ones that blew the mind of
Joerg's C++ compiler.

Because this is not a user-facing API (the only userland consumer
sys/quotactl.h is libquota) it is sort of ok to make arbitrary
source-incompatible changes; however, by the same token it's completely
unnecessary. If it *were* a user-facing API that someone might have a
semi-rational reason to want to run a C++ compiler on, it would be
incorrect to change it at this point.

Sync getfh() with the native implementation. It also fixes:
a) a return value
b) a vnode lock
c) a user-controlled memory allocation

ok christos@, on tech-kern

Sync swapctl() with netbsd32. Return EINVAL when misc<0, and 0 when misc=0
or uvmexp.nswapdev=0.

delete -> remove

Don't t use a C++ keyword as field name.

Fix cases where count <= 0 (thanks to Maxime Villard for raising this)

Do not use native off_t type under compat netbsd32, but a new
netbsd32_off_t that provide the expected alignment for 64bit types.

branches: 1.185.2;
Fix a potential - but very unlikely - NULL pointer dereference.
(it does not introduce a new error code for open(), since
pathbuf_copyin() is already there and can return ENOMEM)

Found by my code scanner.

Properly translate struct swapent for COMPAT_NETBSD32

ifdef debug printf

compat_10 fix: open(NULL) == open(".");

Move *at syscall handlers to netbsd32_fs.c from netbsd32_netbsd.c
Fix netbsd32_fstatat to emit a 32bit stat structure.

branches: 1.180.2; 1.180.4; 1.180.10;
Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!
Approved by core@.

branches: 1.179.2;
Improve the names of some members of struct quotactl_args. These are
effectively function parameter names, but since they need to be
described with the same names in the man page the choices do matter.
Some.

Update compat_netbsd32 for new quotactl.

Add missing *at syscalls among others

Add vfs_quotactl() in between the syscall and VFS_QUOTACTL. Call it
from the COMPAT_50 code as well as the current sys_quotactl instead
of going directly to VFS_QUOTACTL. Doesn't actually do anything yet.

branches: 1.175.4;
Fix pipe2 return value.

Add kqueue1(2) support.

branches: 1.173.2;
Add dup3 syscall support.

Add pipe2 syscall now needed for popen(3).

Delete some splurious commas and very unexpected trailing space

branches: 1.170.2;
Catch up with lim_privatise() change (missed in previous commit).

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.168.2; 1.168.4;
Introduce struct pathbuf. This is an abstraction to hold a pathname
and the metadata required to interpret it. Callers of namei must now
create a pathbuf and pass it to NDINIT (instead of a string and a
uio_seg), then destroy the pathbuf after the namei session is
complete.

Update all namei call sites accordingly. Add a pathbuf(9) man page and
update namei(9).

The pathbuf interface also now appears in a couple of related
additional places that were passing string/uio_seg pairs that were
later fed into NDINIT. Update other call sites accordingly.

Replace M_IOV and some malloc(9)s with kmem(9), and while there:
- Fix invalid free (M_TEMP vs M_IOV) in do_sys_recvmsg(), spotted by jakllsch@.
Also, same fix in osf1_sys_sendmsg_xopen().
- Fix attempt to free non-allocated memory in error path in netbsd32___getfh30().
- Plug a memory leak in compat_43_netbsd32_orecvmsg().

branches: 1.166.2;
remove nfssvc emulation (or non-emulation)

-fs_lfs.h

remove unused lfs compat stubs

branches: 1.163.2;
Merge from matt-nb5-mips64

Add missing semicolons after NETBSD32TOx_UAP macro calls.

Move saemul_netbsd32 to netbsd32_sa.c and allow the KERN_SA bits to be omitted.

Kill redundant assignment.

Initialise struct emul members by name (it is readable now and one can search
them in the tree).

Add enum uio_seg argument to do_sys_mknod and do_sys_mkdir so these functions
can be called from kernel, too.

Change needed for zfs device node creation, until we have propoer devfs.

Oked by ad@.

pad -> PAD. Fixes build problem reported by Paul Goyette in private email.

Fix dev_t alignment, by not using the new 64bit value directly but
rather a 32bit aligned version (netbsd32_dev_t = netbsd32_uint64).

ok by cube@.

Fix the posix_fadvise return value... finally.

Tested martin on sparc64/m68k and me on hppa.

branches: 1.154.2;
Cleanup. Kill a few netbsd32_caddr_t in syscalls argument types.

Revert accidental of some rogue changes which broke the build.

Include "bsd.own.mk" to get the definition of "NETBSDSRCDIR" via
"/etc/mk.conf". This fixes manual use of "make cleandir".

Follow christos-time_t merge.

merge christos-time_t

branches: 1.149.4;
implement netbsd32__sched_setparam(), netbsd32__sched_getparam(),
netbsd32__sched_setaffinity() and netbsd32__sched_getaffinity().

Make it possible to compile a kernel with COMPAT_NETBSD32 but without
COMPAT_40. This fixes PR port-amd64/39967.

Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

branches: 1.145.2; 1.145.4;
Merge wrstuden-revivesa into HEAD.

branches: 1.144.4;
remove clause #3 from my license where there are no other
copyright holders involved.

branches: 1.143.2; 1.143.4; 1.143.6;
Catch up with descriptor handling changes. See kern_descrip.c revision
1.173 for details.

Remove old posix_fadvise compat code

branches: 1.141.2; 1.141.6;
wrong argument type

Catch up with versioning of posix_fadvise

Call do_posix_fadvise() in netbsd32_posix_fadvise()

Split the return value of sys_lseek() into two 32 bit halves for retval[0/1]
in a manner that is endianness independant.
Should mean the amd64 will return correct offsets > 2^32 (sparc64 had a
special define).
Any new netbsd32 ports should work regardless of the endianness.

Don't try to bound the return value for pread/pwrite/pathconf by casting
an 'ssize_t' or 'long' variable to 'register_t'.
If the sizes were different it would either overwrite stack or return
uninitialised stack. On big-endian systems things would be worse!

Add a wrapper for posix_fadvise()

Add netbsd32 wrapper for sys_mremap(), compiles, and assuming the mmap()
wrapper is ok, it should work!
I presume the kernel knows not to map above 4GB though....

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.

branches: 1.133.2;
Remove last argument from NDINIT call, following
"Remove cn_lwp from struct componentname. curlwp should be used
from on. The NDINIT() macro no longer takes the lwp parameter and
associates the credentials of the calling thread with the namei
structure." from pooka.

branches: 1.132.2;
ANSIfy most of the function definitions in sys/compat (but not ndis).
All by the magic of sed ...

Remove all the __P

branches: 1.130.2;
Fix builds for ports that don't define __HAVE_MINIMAL_EMUL (eg sparc64).
Fallout from a change that made #define names for syscalls (etc) start
NETBSD32 (not netbsd32).

Add arguments to sys_syscall and sys___syscall.
Use MI wrappers for them in netbsd32.
Change prefix for constants from netbsd32 to NETBSD32 (used in #defines etc).

branches: 1.128.2; 1.128.4;
Change the way p->p_limit (and hence p->p_rlimit) is locked.
Should fix PR/36939 and make the rlimit code MP safe.
Posted for comment to tech-kern (non received!)

The p_limit field (for a process) is only be changed once (on the first
write), and a reference to the old structure is kept (for code paths
that have cached the pointer).
Only p->p_limit is now locked by p->p_mutex, and since the referenced memory
will not go away, is only needed if the pointer is to be changed.
The contents of 'struct plimit' are all locked by pl_mutex, except that the
code doesn't bother to acquire it for reads (which are basically atomic).
Add FORK_SHARELIMIT that causes fork1() to share the limits between parent
and child, use it for the IRIX_PR_SULIMIT.
Fix borked test for both IRIX_PR_SUMASK and IRIX_PR_SDIR being set.

branches: 1.127.2;
Rename members of 'struct plimit' so that the fields are 'pl_xxx' and
no longer have the same names as members of 'struct proc'.

branches: 1.126.2;
Changes to make ktrace LKM friendly and reduce ifdef KTRACE. Proposed
on tech-kern.

branches: 1.125.2; 1.125.6;
Adapt for sys_mount() becoming compat_40_sys_mount(),

Changes to sompat socket function to avoid the dreaded stackgap.

Delete a diagnostic printf and some unused 'stack gap' initialisation.

Change the way that emulations locate files within the emulation root to
avoid having to allocate space in the 'stackgap'
- which is very LWP unfriendly.
The additional code for non-emulation namei() is trivial, the reduction for
the emulations is massive.
The vnode for a processes emulation root is saved in the cwdi structure
during process exec.
If the emulation root the TRYEMULROOT flag are set, namei() will do an initial
search for absolute pathnames in the emulation root, if that fails it will
retry from the normal root.
".." at the emulation root will always go to the real root, even in the middle
of paths and when expanding symlinks.
Absolute symlinks found using absolute paths in the emulation root will be
relative to the emulation root (so /usr/lib/xxx.so -> /lib/xxx.so links
inside the emulation root don't need changing).
If the root of the emulation would be returned (for an emulation lookup), then
the real root is returned instead (matching the behaviour of emul_lookup,
but being a cheap comparison here) so that programs that scan "../.."
looking for the root dircetory don't loop forever.
The target for symbolic links is no longer mangled (it used to get the
CHECK_ALT_xxx() treatment, so could get /emul/xxx prepended).
CHECK_ALT_xxx() are no more. Most of the change is deleting them, and adding
TRYEMULROOT to the flags to NDINIT().
A lot of the emulation system call stubs could now be deleted.

Change all the NETBSD32PTR64(SCARG(uap, xxx))) to SCARG_P32(uap, xxx).

remove all the double (and triple) casts used to convert 32bit userspace
pointers to and from 64bit kernel pointers. Instead use the defines
NETBSD32PTR64(p32) to read a 32bit pointer and (the new) NETBSD32PTR32(p32,p64)
to write a 32bit pointer throughout.
The 32bit pointer is now a struct to enforce the above.
amd64 (with linux emul) and sparc64 will both compile (when the arch stuff
goes in soon), and amd64 still runs some i386 binaries.

branches: 1.119.2; 1.119.4; 1.119.6;
fix fallout from caddr_t changes.

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

Introduce a new member to struct emul, e_startlwp, to be used by
sys__lwp_create. It allows using the said syscall under COMPAT_NETBSD32.

The libpthread regression tests now pass on amd64 and sparc64.

branches: 1.116.2;
Merge newlock2 to head.

deal with RLIM_INFINITY in the setrlimit case.

Simplify previous commit not to use dosetrlimit(), since we don't want the
kauth tests etc.

From Nicolas Joly:

> It seems that 32bits programs, running under compat_netbsd32, using
> setrlimit force all other programs to have their maximum data size
> fixed at 3GB, where native 64bits apps used 8GB previously.

I tracked this one to the `netbsd32_adjust_limits()' function (called
when creating a new process under compat_netbsd32), where data and
stack limits are set without checking for shared `p_limit' structure
(p_limit->p_refcnt > 1). This explain the side effect where processes
have their limits changed when a compat_netbsd32 (or compat_linux32)
program is run.

The fix is to use `dosetrlimit()' to ensure the needed copy-on-write
behaviour for shared structure.

Clean some KAUTH_GENERIC_ISSUSER usage in compat code.

branches: 1.111.2; 1.111.4;
When calling PTRACE from an LKM, use sysent[SYS_ptrace].sy_call in case
the sys_ptrace symbol isn't present.

Protect netbsd32_ptrace with options PTRACE.

Make filehandles opaque to userland

Use the LWP cached credentials where sane.

do not protect the getfh syscall by
#if defined(NFS) || defined(NFSSERVER).
The native syscall also isn't.

Fix alignement problems for fhandle_t, exposed by gcc4.1.

While touching all vptofh/fhtovp functions, get rid of VFS_MAXFIDSIZ,
version the getfh(2) syscall and explicitly pass the size available in
the filehandle from userland.

Discussed on tech-kern, with lots of help from yamt (thanks!).

version the socket(2) syscall. for compat30 socket, we use
EPROTONOSUPPORT instead of EAFNOSUPPORT.

from pavel@ with a little bit of clean up from myself.

XXX: netbsd32 (and perhaps other emulations) should be able
XXX: to call the standard socket calls for this i think, but
XXX: revisit this at another time.

branches: 1.104.4;
integrate kauth.

use socklen_t where appropriate.

Move fhstat as sys___fhstat30 in netbsd32_fs.c because it doesn't belong
to netbsd32_netbsd.c (which incidentally means it had been broken for a
while I guess). Add compat_30 version.

Implement the _lwp* and sa_* families of syscalls, using the newly
introduced hooks in the native code.

branches: 1.100.2; 1.100.4; 1.100.6;
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

branches: 1.99.2; 1.99.4; 1.99.6;
merge ktrace-lwp.

Fix lossage I created with the 64 bit ino_t change.

When returning 64bit values (from netbsd32_lseek) fix up the return
value vector (of 32bit values, most likely) via a MD macro.

Add the *xattr(2) family of syscalls. Just like the *extattr(2) family,
they're waiting for an actual FS back-end to be tested, but are still
straightforward enough.

Add rasctl(2). Thanks to the regression tests for that syscall, I was able
to discover the bugs in netbsd32_setitimer() and netbsd32_execve().

Add support for fsync_range(2).

Implement __clone(2).

Add mlockall(2) and munlockall(2).

Implement the extattr(3) family of syscalls.

XXX However, those remain untested as there are currently no backend for
XXX extattr(9) in NetBSD.

branches: 1.90.2;
Implement uuidgen(2).

track change to swapctl args in kern/syscalls.master.

Fix some things regarding COMPAT_NETBSD32 and limits/VM addresses.

* For sparc64 and amd64, define *SIZ32 VM constants.
* Add a new function pointer to struct emul, pointing at a function
that will return the default VM map address. The default function
is uvm_map_defaultaddr, which just uses the VM_DEFAULT_ADDRESS
macro. This gives emulations control over the default map address,
and allows things to be mapped at the right address (in 32bit range)
for COMPAT_NETBSD32.
* Add code to adjust the data and stack limits when a COMPAT_NETBSD32
or COMPAT_SVR4_32 binary is executed.
* Don't use USRSTACK in kern_resource.c, use p_vmspace->vm_minsaddr
instead (emulations might have set it differently)
* Since this changes struct emul, bump kernel version to 3.99.2

Tested on amd64, compile-tested on sparc64.

branches: 1.87.2;
nuke trailing whitespace

branches: 1.86.4; 1.86.6;
o Add support for the statvfs family of syscalls (statvfs1, fstatvfs1,
fhstatvfs1 and getvfsstat)
o Move the statfs family out of netbsd32_fs.c and netbsd32_netbsd.c to
netbsd_compat_20.c, compiled with COMPAT_20

Reviewed by christos@.

Add the missing 'v' to fhstatvfs1

try to make this compile. XXX: this will not work yet (hi simon)

Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.

use netbsd32_sigcode with COMPAT_16 only

fix a (syscall args) comment.

Put back Emmanuel's sigfilter hooks, as decided by Core.

Introduce lwp_emuldata and the associated hooks. No hook is provided for the
exec case, as the emulation already has the ability to intercept that
with the e_proc_exec hook. It is the responsability of the emulation to
take appropriaye action about lwp_emuldata in e_proc_exec.

Patch reviewed by Christos.

back the sigfilter emulation hook change off

Dynamic sysctl.

Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al. Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.

Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded. Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.

All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.

PS - I'm sorry, but there's a distinct lack of documentation at the
moment. I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.

Add a sigfilter emulation hook. It is used at the beginning of kpsignal2()
so that a specific emulation has the oportunity to filter out some signals.

if sigfilter returns 0, then no signal is sent by kpsignal2().

There is another place where signals can be generated: trapsignal. Since this
function is already an emulation hook, no call to the sigfilter hook was
introduced in trapsignal.

This is needed to emulate the softsignal feature in COMPAT_DARWIN (signals
sent as Mach exception messages)

Add necessary include file.

add support for non-executable mappings (where the hardware allows this)
and make the stack and heap non-executable by default. the changes
fall into two basic catagories:

- pmap and trap-handler changes. these are all MD:
= alpha: we already track per-page execute permission with the (software)
PG_EXEC bit, so just have the trap handler pay attention to it.
= i386: use a new GDT segment for %cs for processes that have no
executable mappings above a certain threshold (currently the
bottom of the stack). track per-page execute permission with
the last unused PTE bit.
= powerpc/ibm4xx: just use the hardware exec bit.
= powerpc/oea: we already track per-page exec bits, but the hardware only
implements non-exec mappings at the segment level. so track the
number of executable mappings in each segment and turn on the no-exec
segment bit iff the count is 0. adjust the trap handler to deal.
= sparc (sun4m): fix our use of the hardware protection bits.
fix the trap handler to recognize text faults.
= sparc64: split the existing unified TSB into data and instruction TSBs,
and only load TTEs into the appropriate TSB(s) for the permissions.
fix the trap handler to check for execute permission.
= not yet implemented: amd64, hppa, sh5

- changes in all the emulations that put a signal trampoline on the stack.
instead, we now put the trampoline into a uvm_aobj and map that into
the process separately.

originally from openbsd, adapted for netbsd by me.

branches: 1.73.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

struct proc * -> struct lwp *

Make sure to include opt_foo.h if a defflag option FOO is used.

Merge the nathanw_sa branch.

branches: 1.69.2;
After a discussion with various folks, fix the strict-alias warning
by ditching 'void *rt' and passing retval directly to sys_mmap().

Avoid strict-alias warnings.

set struct emul's nsysent to compat SYS_NSYSENT, not SYS_MAXSYSCALL

In preparation for COMPAT_NETBSD32 on SH-5:

- The MD netbsd32_machdep.h header now defines the 32-bit pointer type
instead of using u_int32_t everywhere,
- The MD netbsd32_machdep.h header now defines a macro (at least on
current implementations) which converts a 32-bit pointer to its 64-bit
equivalent,
- Change the MI code to utilise the above two items in all the right places,
- Implement netbsd32___sigaction_sigtramp().

Tested on Sparc64 by Matt Green.

- Introduce a e_fault field in struct proc to provide emulation specific
memory fault handler. IRIX uses irix_vm_fault, and all other emulation
use NULL, which means to use uvm_fault.

- While we are there, explicitely set to NULL the uninitialized fields in
struct emul: e_fault and e_sysctl on most ports

- e_fault is used by the trap handler, for now only on mips. In order to avoid
intrusive modifications in UVM, the function pointed by e_fault does not
has exactly the same protoype as uvm_fault:
int uvm_fault __P((struct vm_map *, vaddr_t, vm_fault_t, vm_prot_t));
int e_fault __P((struct proc *, vaddr_t, vm_fault_t, vm_prot_t));

- In IRIX share groups, all the VM space is shared, except one page.
This bounds us to have different VM spaces and synchronize modifications
to the VM space accross share group members. We need an IRIX specific hook
to the page fault handler in order to propagate VM space modifications
caused by page faults.

Move netbsd32_sysarch to netbsd32_machdep.c

branches: 1.63.4;
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.

add RCSIDs (including regeneration of files as appropriate)

Make the setregs hook emulation-specific, rather than executable
format specific.
Struct emul has a e_setregs hook back, which points to emulation-specific
setregs function. es_setregs of struct execsw now only points to
optional executable-specific setup function (this is only used for
ECOFF).

branches: 1.60.2; 1.60.4;
Some of this was sparc-specific, so ifdef __sparc__ it (XXX). Also,
change the alignment of one structure with an MD ifdef. Should
be moved into the netbsd32_machdep parts.

Add an e_trapsignal member to struct emul, so that emulated processes can
send the appropriate signal depending on the trap type.

use _KERNEL_OPT.

branches: 1.57.2;
split up netbsd32_netbsd.c into 9 new files, leaving only those syscalls that
have no special interpretations besides simple syscall args conversion.

move the static inline conversion functions into a header file so other
files can see these. note a bunch of functions that should be moved
into their own files.

Specify a process' address space limits for uvmspace_exec().

change_utimes32() was copyin()ing a struct timeval, not netbsd32_timeval.
general clean up.

emulate kern.boottime. now 32-bit w(1) works properly.

make sysctl vm.loadavg work.

sync a comment from sys_execve().
make netbsd32_recvfrom() work.

implement netbsd32_lchflags & netbsd32_utrace

de-static netbsd32_exec_aout_prep_[zno]magic().
de-static netbsd32_from_stat43().
move the guts of netbsd32_execve() into netbsd32_execve2().

all of are for the forthcoming sunos32 compat mode (for sparc64).

Use CHECK_ALT_SYMLINK() instead CHECK_ALT_EXISTS() where appropriate.
This addresses kern/11757.

split off thread specific stuff from struct sigacts to struct sigctx, leaving
only signal handler array sharable between threads
move other random signal stuff from struct proc to struct sigctx

This addresses kern/10981 by Matthew Orgass.

Do the __HAVE_SYSCALL_INTERN and __HAVE_MINIMAL_EMUL dance.

always fill in e_syscall in respective emul_*; if the emulation doesn't
have it's own separated *_syscall() function, use syscall()

add infrastructure to load emulations and their executable support dynamically
via LKM

Use a copied fktrace syscall arg structure with out 'const int' for the
filedescriptor to copy arguments, avoiding a warning. XXX

always define COMPAT_OLDSOCK (this tracks rev.1.55 of kern/uipc_syscalls.c)
move definition of emul_netbsd32 from netbsd32_exec.c here
fix couple of compile nits I encountered while compiling this with
sparc cross-compiler

add e_path (emulation path) to struct emul, which replaces emulation-specific
*_emul_path variables

change macros CHECK_ALT_{CREAT|EXIST} to use that, 'root' doesn't need
to be passed explicitly any more and *_CHECK_ALT_{CREAT|EXIST} are removed
change explicit emul_find() calls in probe functions to get the emulation
path from the checked exec switch entry's emulation

remove no longer needed header files

add e_flags and e_syscall to struct emul; these are unsed and empty for now

sync netbsd32_execve() with sys_execve() - this involves
VMCMD_RELATIVE support, couple of debugging printfs and addition of
doexechooks() call
also fix one FREE() which should be free()

make this compile again, after execsw/lkm changes.

Add support for variable end of user stacks needed to support COMPAT_NETBSD32:

`struct vmspace' has a new field `vm_minsaddr' which is the user TOS.

PS_STRINGS is deprecated in favor of curproc->p_pstr which is derived
from `vm_minsaddr'.

Bump the kernel version number.

The ovadvise syscall is (correctly) listed as STD, so move it's implementation
to another place. This makes kernels without options COMPAT_43 link.

Fix netbsd32_ioctls.

Convert namei pathname buffer allocation to use the pool allocator.

- Fix the likely cause of the "ps(1) hangs machine" problem. Always
vslock the user pages for the data being copied out to userspace,
so that we won't sleep while holding a lock in case we need to
fault the pages in.
- Sprinkle some const and ANSI'ify some things while here.

Sync w/ kern_time.c and sys_generic.c

- massive warning fix fest.
- fix pread/pwrite return values (plus some other syscalls that looked
similarly broken).
- prototypes and clean up for netbsd32_ioctl.c

now getpw*() works under compat32!

look in /emul/netbsd32 for __stat13() and __lstat13().

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

remove/move more mach vm header files:

<vm/pglist.h> -> <uvm/uvm_pglist.h>
<vm/vm_inherit.h> -> <uvm/uvm_inherit.h>
<vm/vm_kern.h> -> into <uvm/uvm_extern.h>
<vm/vm_object.h> -> nothing
<vm/vm_pager.h> -> into <uvm/uvm_pager.h>

also includes a bunch of <vm/vm_page.h> include removals (due to redudancy
with <vm/vm.h>), and a scattering of other similar headers.

branches: 1.28.2;
Include "opt_DDB.h" to enable the DDB sysctls.

branches: 1.27.2;
sleep() -> tsleep()

Reduce use of curproc in several places:

- Change ktrace interface to pass in the current process, rather than
p->p_tracep, since the various ktr* function need curproc anyway.

- Add curproc as a parameter to mi_switch() since all callers had it
handy anyway.

- Add a second proc argument for inferior() since callers all had
curproc handy.

Also, miscellaneous cleanups in ktrace:

- ktrace now always uses file-based, rather than vnode-based I/O
(simplifies, increases type safety); eliminate KTRFLAG_FD & KTRFAC_FD.
Do non-blocking I/O, and yield a finite number of times when receiving
EWOULDBLOCK before giving up.

- move code duplicated between sys_fktrace and sys_ktrace into ktrace_common.

- simplify interface to ktrwrite()

Kill register declarations.

New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.

Add support for -current's ELF32 exec format.

Regen

netbsd32_close() would work better if it called sys_close() rather than
sys_write().
netbsd32_getfsstat() cannot just copyin()/copyout(), convert the structures,
and call sys_getffstat(). sys_getffstat() wants to do its own
copyin()/copyout(). So we need to implent the whole of sys_getffstat()
in netbsd32_getfsstat().

Update to 32-bit compatibility routines.

branches: 1.19.2;
Add netbsd32_compat_14.c

Rename everything from compat_netbsd32 -> netbsd32 so we don't have silly
names like compat_14_compat_netbsd32_sys_shmctl().

branches: 1.18.2;
Remplace kern.shortcorename sysctl with a more flexible sheme,
core filename format, which allow to change the name of the core dump,
and to relocate it in a directory. Credits to Bill Sommerfeld for giving me
the idea :)
The default core filename format can be changed by options DEFCORENAME and/or
kern.defcorename
Create a new sysctl tree, proc, which holds per-process values (for now
the corename format, and resources limits). Process is designed by its pid
at the second level name. These values are inherited on fork, and the corename
fomat is reset to defcorename on suid/sgid exec.
Create a p_sugid() function, to take appropriate actions on suid/sgid
exec (for now set the P_SUGID flag and reset the per-proc corename).
Adjust dosetrlimit() to allow changing limits of one proc by another, with
credential controls.

Change the semantics of splsoftclock() to be like other spl*() functions,
that is priority is rasied. Add a new spllowersoftclock() to provide the
atomic drop-to-softclock semantics that the old splsoftclock() provided,
and update calls accordingly.

This fixes a problem with using the "rnd" pseudo-device from within
interrupt context to extract random data (e.g. from within the softnet
interrupt) where doing so would incorrectly unblock interrupts (causing
all sorts of lossage).

XXX 4 platforms do not have priority-raising capability: newsmips, sparc,
XXX sparc64, and VAX. This platforms still have this bug until their
XXX spl*() functions are fixed.

Move the call of cpu_wait() out of the wait4() functions, and into the
body of reaper(), right before the call to uvm_exit(). cpu_wait() must
be done before uvm_exit() because the resources it frees might be located
in the PCB.

Make uvm_vslock() return the error code from uvm_fault_wire(). All places
which use uvm_vslock() should now test the return value. If it's not
KERN_SUCCESS, wiring the pages failed, so the operation which is using
uvm_vslock() should error out.

XXX We currently just EFAULT a failed uvm_vslock(). We may want to do
more about translating error codes in the future.

Propagate kern changes

XXX Pass VM_PROT_NONE to uvm_vslock() as access_type. Why are we even
vslocking here?! copyout() on its own seems to suffice just about everwhere
else, and it's not like the process is going to exit; it's in a system
call!

Add "use counting" to file entries. When closing a file, and it's reference
count is 0, wait for use count to drain before finishing the close.

This is necessary in order for multiple processes to safely share file
descriptor tables.

branches: 1.11.4;
SPARC32->NETBSD32

move sparc32 to netbsd32; split out MD part (signal handling) (mostly via repository copy, rename and perl -pi :-)

formatting nits

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

solve the COMPAT_OLDSOCK/MSG_COMPAT problem differently:
The source files which need MSG_COMPAT define COMPAT_OLDSOCK.

Overhaul. Now will run simple things like /bin/sh and /bin/echo.

Add some copyin()/copyout()s. These need to be done but there are more
annoying issues, so I'll just check in this snapshot.

Some more 64-bit cleanup. Now everything compiles.

Some more 64-bit-ification.

use right syscalls. add converters for timespec and semid_ds

add a 32-bit compatibility module for the sparc64 port, so it can run NetBSD/sparc binaries with a LP64 kernel.

COMPAT_NETBSD32: Add support for memfd_create(2).

netbsd32_netbsd: Sort headers. No binary changes.

Add the eventfd(2) system call to COMPAT_NETBSD32.

The read/write/send/recv system calls return ssize_t because -1 is
returned on error. Therefore we must restrict the lengths of any
buffers to NETBSD32_SSIZE_MAX with compat32 to avoid garbage return
values.

Fixes ATF lib/libc/sys/t_write:write_err.

Remove unused LIMITCHECK() macro (now contained in netbsd32_rlimit.c).

branches: 1.230.2;
Teach about getrandom(2) to COMPAT_NETBSD32.

Add ACL support for FFS. From FreeBSD.

branches: 1.228.2;
Add mkfifo{,at}(2) mode in mknod{,at}(2) as requested by POSIX

mknod with mode & S_IFIFO and dev=0 shall behave like mkfifo.

Update the documentation to reflect this state.

Add ATF tests.

This is an in-kernel implementation as typically user-space programs use
mkfifo(2) directly, however whenever there is need to bypass libc (like in
valgrind) then portable POSIX software calls the mknod syscall.

Noted on tech-kern@ by Greg Troxel.

Drop unused retval pointer from do_sys_mknod{,at}()

No functional change intended.

sort -u opt_ to remove dup.

Add options for quota.

Include opt_quota.h

Fixes (at least) the amd64 build.

Merge the [pgoyette-compat] branch

move mmap(), compat 40 mount(), pipe() and getfh() into their own files
as the implementation is non trivial or is compat. mark old mount()
properly instead of manually #if'ing ito to ENOSYS.

move rlimit and quota code into their own modules.

(netbsd32_netbsd.c should have only simple shims. anything more
than copying arguments from one args struct to the other should
not be placed in this file. still a couple more to move out.)

fix style consistency.
remove obsolete comments or commented code.
NFC.

pset_create() takes a pointer so it needs special handling.

Allow syscall_establish() to install new syscalls when the existing
entry-point is either sys_nomodule or sys_nosys. Update the
makesyscalls.sh script to create a const array of bits to allow
syscall_disestablish() to properly restore the original entry-point.
Update all the initializers of struct emul to initialize the pointer
to the bit array struct emul.

XXX Regen of all files created by makesyscalls.sh will come soon,
XXX followed by a kernel version bump (since struct emul is being
XXX modified).

This commit should address PR kern/45781 and also removes the need
for the work-around for that PR in file

sys/arch/usermode/modules/syscallemu/syscallemu.c

Add getsockopt2().

branches: 1.216.2;
Remove an element from struct emul: e_tracesig

e_tracesig used to be implemented for Darwin compat. Nowadays the Darwin
compatiblity layer is gone and there are no other users.

This functionality isn't used where it shall be used in the existing
codebase.

If we want to emulate debugging interfaces in compat layers we would need
to implement that from scratch anyway. We would need to be bug compatible
with other OSes too.

Proposed on tech-kern@.

Welcome to NetBSD 8.99.16!

Sponsored by <The NetBSD Foundation>

Untangle the swapctl compat code mess. Welcome to lucky 13.

branches: 1.214.2;
remove struct emul's e_fault.

It used to be used by COMPAT_IRIX for the purpose of overriding
uvm_fault (only implemented in MIPS), now removed.

Ride 8.99.12 version bump.

Revert vadvise(2) removal

This system call was used in legacy Lisp code, that was inherited to modern
age and still compiled against supported compat layers (e.g. in clisp,
oaklisp, Franz Lisp).

It used to instruct the kernel about paging policy (G/C aware, flush etc).

Newly compiled code (assuming that it will detect vadvise()) will use the
libc stub for vadvise(). The headers for this interface are gone.

vadvise(2) could be marked as COMPAT_80, but as long as we support ultrix,
sunos or aout68k ABI, don't bother with this.

Requested by <mrg>

Refactor pipe1() and correct a bug in sys_pipe2() (SYS_pipe2)

sys_pipe2() returns two integers (values), the 2nd one is a copy of the 2nd
file descriptor that lands in fildes[2]. This is a side effect of reusing
the code for sys_pipe() (SYS_pipe) and not cleaning it up.

The first returned value is (on success) 0.

Introduced a small refactoring in pipe1() that it does not operate over
retval[], but on an array int[2]. A user sets retval[] for pipe() when
desired and needed.

This refactoring touches compat code: netbsd32, linux, linux32.

Before the changes on NetBSD/amd64:

$ ktruss -i ./a.out
[...]
15131 1 a.out pipe2(0x7f7fff2e62b8, 0) = 0, 4
[...]

After the changes:

$ ktruss -i ./a.out
[...]
782 1 a.out pipe2(0x7f7fff97e850, 0) = 0
[...]

There should not be a visible change for current users.

Sponsored by <The NetBSD Foundation>

Drop SYS_vadvise

The (o)vadvise syscall is dummy since the beginning of NetBSD.

It is an obsolete remnant from the old UNIX.

Sponsored by <The NetBSD Foundation>

Drop SYS_sbrk

sbrk - change data segment size

This syscall is dummy since the inception of the project.

Sponsored by <The NetBSD Foundation>

Drop the sstk(2) syscall stub

sstk - change stack section size

This functionality has never been implemented and is a remnant from 16-bit
UNIX. This stub appeared with the first NetBSD commit.

Sponsored by <The NetBSD Foundation>

disable 32 bit signal ktrace records; 32 bit traced process produce 64 bit
trace records, the only record that we can't parse is that one :-)
XXX: pullup-8

Remove references to COMPAT_OLDSOCK (itself removed years ago).

branches: 1.206.2;
move MAP_COPY in compat

branches: 1.205.6;
PR kern/51514: ptrace(2) fails for 32-bit process on 64-bit kernel

Updated from the original patch in the PR by me.

deal with not having KTRACE

Allow emulations to override the creation of ktrace records for posting
signals. In compat_netbsd32 use this to write the 32bit version of
the records, so a 32bit userland kdump is happy.

Trailing whitespace

+netbsd32__sched_protect

branches: 1.200.2;
clamp getrlimit the same way we clamp setrlimit

Add missing newline character in error message

This is related to kern/50469.

Adapt to per-emulation syscall_autoload capability (the table of syscalls
that can be autoloaded is currently empty).

Lock before calling uvm_swap_stats(). Otherwise a race condition could
corrupt memory.

Implement trivial conversion for pset_*

Implement posix_fallocate and fdiscard compat

Fix a comment.

branches: 1.193.2; 1.193.4; 1.193.6; 1.193.10;
Just return sys_open(). COMPAT_10 will be handled internally.

ok christos@

Revert the following changes:

src/sys/sys/quotactl.h 1.37
src/sys/compat/netbsd32/netbsd32.h 1.101
src/sys/compat/netbsd32/netbsd32_netbsd.c 1.188, 1.189
src/sys/kern/vfs_quotactl.c 1.39
src/sys/kern/vfs_syscalls.c 1.483
src/sys/ufs/lfs/ulfs_quota.c 1.11
src/sys/ufs/ufs/ufs_quota.c 1.116
src/lib/libquota/quota_kernel.c 1.5

and do them correctly.

If you're going to change the name of something, you need to change
the name of *all* the things with the same name, not just a handful,
and you should change it to something similar so it still matches the
rest of the system rather than just picking an arbitrarily different
name.

Hi, Joerg.

To wit, rename the quotactl "delete" operation to "del", because
"delete" is a reserved word in C++ and for some reason Joerg wants to
run internal interfaces used only by C code through his C++ compiler.
Do not rename it to "remove" instead, because this doesn't match
libquota or the rest of the usage throughout the system; and rename
all the related identifiers, not just the ones that blew the mind of
Joerg's C++ compiler.

Because this is not a user-facing API (the only userland consumer
sys/quotactl.h is libquota) it is sort of ok to make arbitrary
source-incompatible changes; however, by the same token it's completely
unnecessary. If it *were* a user-facing API that someone might have a
semi-rational reason to want to run a C++ compiler on, it would be
incorrect to change it at this point.

Sync getfh() with the native implementation. It also fixes:
a) a return value
b) a vnode lock
c) a user-controlled memory allocation

ok christos@, on tech-kern

Sync swapctl() with netbsd32. Return EINVAL when misc<0, and 0 when misc=0
or uvmexp.nswapdev=0.

delete -> remove

Don't t use a C++ keyword as field name.

Fix cases where count <= 0 (thanks to Maxime Villard for raising this)

Do not use native off_t type under compat netbsd32, but a new
netbsd32_off_t that provide the expected alignment for 64bit types.

branches: 1.185.2;
Fix a potential - but very unlikely - NULL pointer dereference.
(it does not introduce a new error code for open(), since
pathbuf_copyin() is already there and can return ENOMEM)

Found by my code scanner.

Properly translate struct swapent for COMPAT_NETBSD32

ifdef debug printf

compat_10 fix: open(NULL) == open(".");

Move *at syscall handlers to netbsd32_fs.c from netbsd32_netbsd.c
Fix netbsd32_fstatat to emit a 32bit stat structure.

branches: 1.180.2; 1.180.4; 1.180.10;
Remove COMPAT_SA / KERN_SA. Welcome to 6.99.3!
Approved by core@.

branches: 1.179.2;
Improve the names of some members of struct quotactl_args. These are
effectively function parameter names, but since they need to be
described with the same names in the man page the choices do matter.
Some.

Update compat_netbsd32 for new quotactl.

Add missing *at syscalls among others

Add vfs_quotactl() in between the syscall and VFS_QUOTACTL. Call it
from the COMPAT_50 code as well as the current sys_quotactl instead
of going directly to VFS_QUOTACTL. Doesn't actually do anything yet.

branches: 1.175.4;
Fix pipe2 return value.

Add kqueue1(2) support.

branches: 1.173.2;
Add dup3 syscall support.

Add pipe2 syscall now needed for popen(3).

Delete some splurious commas and very unexpected trailing space

branches: 1.170.2;
Catch up with lim_privatise() change (missed in previous commit).

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

branches: 1.168.2; 1.168.4;
Introduce struct pathbuf. This is an abstraction to hold a pathname
and the metadata required to interpret it. Callers of namei must now
create a pathbuf and pass it to NDINIT (instead of a string and a
uio_seg), then destroy the pathbuf after the namei session is
complete.

Update all namei call sites accordingly. Add a pathbuf(9) man page and
update namei(9).

The pathbuf interface also now appears in a couple of related
additional places that were passing string/uio_seg pairs that were
later fed into NDINIT. Update other call sites accordingly.

Replace M_IOV and some malloc(9)s with kmem(9), and while there:
- Fix invalid free (M_TEMP vs M_IOV) in do_sys_recvmsg(), spotted by jakllsch@.
Also, same fix in osf1_sys_sendmsg_xopen().
- Fix attempt to free non-allocated memory in error path in netbsd32___getfh30().
- Plug a memory leak in compat_43_netbsd32_orecvmsg().

branches: 1.166.2;
remove nfssvc emulation (or non-emulation)

-fs_lfs.h

remove unused lfs compat stubs

branches: 1.163.2;
Merge from matt-nb5-mips64

Add missing semicolons after NETBSD32TOx_UAP macro calls.

Move saemul_netbsd32 to netbsd32_sa.c and allow the KERN_SA bits to be omitted.

Kill redundant assignment.

Initialise struct emul members by name (it is readable now and one can search
them in the tree).

Add enum uio_seg argument to do_sys_mknod and do_sys_mkdir so these functions
can be called from kernel, too.

Change needed for zfs device node creation, until we have propoer devfs.

Oked by ad@.

pad -> PAD. Fixes build problem reported by Paul Goyette in private email.

Fix dev_t alignment, by not using the new 64bit value directly but
rather a 32bit aligned version (netbsd32_dev_t = netbsd32_uint64).

ok by cube@.

Fix the posix_fadvise return value... finally.

Tested martin on sparc64/m68k and me on hppa.

branches: 1.154.2;
Cleanup. Kill a few netbsd32_caddr_t in syscalls argument types.

Revert accidental of some rogue changes which broke the build.

Include "bsd.own.mk" to get the definition of "NETBSDSRCDIR" via
"/etc/mk.conf". This fixes manual use of "make cleandir".

Follow christos-time_t merge.

merge christos-time_t

branches: 1.149.4;
implement netbsd32__sched_setparam(), netbsd32__sched_getparam(),
netbsd32__sched_setaffinity() and netbsd32__sched_getaffinity().

Make it possible to compile a kernel with COMPAT_NETBSD32 but without
COMPAT_40. This fixes PR port-amd64/39967.

Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

branches: 1.145.2; 1.145.4;
Merge wrstuden-revivesa into HEAD.

branches: 1.144.4;
remove clause #3 from my license where there are no other
copyright holders involved.

branches: 1.143.2; 1.143.4; 1.143.6;
Catch up with descriptor handling changes. See kern_descrip.c revision
1.173 for details.

Remove old posix_fadvise compat code

branches: 1.141.2; 1.141.6;
wrong argument type

Catch up with versioning of posix_fadvise

Call do_posix_fadvise() in netbsd32_posix_fadvise()

Split the return value of sys_lseek() into two 32 bit halves for retval[0/1]
in a manner that is endianness independant.
Should mean the amd64 will return correct offsets > 2^32 (sparc64 had a
special define).
Any new netbsd32 ports should work regardless of the endianness.

Don't try to bound the return value for pread/pwrite/pathconf by casting
an 'ssize_t' or 'long' variable to 'register_t'.
If the sizes were different it would either overwrite stack or return
uninitialised stack. On big-endian systems things would be worse!

Add a wrapper for posix_fadvise()

Add netbsd32 wrapper for sys_mremap(), compiles, and assuming the mmap()
wrapper is ok, it should work!
I presume the kernel knows not to map above 4GB though....

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.

branches: 1.133.2;
Remove last argument from NDINIT call, following
"Remove cn_lwp from struct componentname. curlwp should be used
from on. The NDINIT() macro no longer takes the lwp parameter and
associates the credentials of the calling thread with the namei
structure." from pooka.

branches: 1.132.2;
ANSIfy most of the function definitions in sys/compat (but not ndis).
All by the magic of sed ...

Remove all the __P

branches: 1.130.2;
Fix builds for ports that don't define __HAVE_MINIMAL_EMUL (eg sparc64).
Fallout from a change that made #define names for syscalls (etc) start
NETBSD32 (not netbsd32).

Add arguments to sys_syscall and sys___syscall.
Use MI wrappers for them in netbsd32.
Change prefix for constants from netbsd32 to NETBSD32 (used in #defines etc).

branches: 1.128.2; 1.128.4;
Change the way p->p_limit (and hence p->p_rlimit) is locked.
Should fix PR/36939 and make the rlimit code MP safe.
Posted for comment to tech-kern (non received!)

The p_limit field (for a process) is only be changed once (on the first
write), and a reference to the old structure is kept (for code paths
that have cached the pointer).
Only p->p_limit is now locked by p->p_mutex, and since the referenced memory
will not go away, is only needed if the pointer is to be changed.
The contents of 'struct plimit' are all locked by pl_mutex, except that the
code doesn't bother to acquire it for reads (which are basically atomic).
Add FORK_SHARELIMIT that causes fork1() to share the limits between parent
and child, use it for the IRIX_PR_SULIMIT.
Fix borked test for both IRIX_PR_SUMASK and IRIX_PR_SDIR being set.

branches: 1.127.2;
Rename members of 'struct plimit' so that the fields are 'pl_xxx' and
no longer have the same names as members of 'struct proc'.

branches: 1.126.2;
Changes to make ktrace LKM friendly and reduce ifdef KTRACE. Proposed
on tech-kern.

branches: 1.125.2; 1.125.6;
Adapt for sys_mount() becoming compat_40_sys_mount(),

Changes to sompat socket function to avoid the dreaded stackgap.

Delete a diagnostic printf and some unused 'stack gap' initialisation.

Change the way that emulations locate files within the emulation root to
avoid having to allocate space in the 'stackgap'
- which is very LWP unfriendly.
The additional code for non-emulation namei() is trivial, the reduction for
the emulations is massive.
The vnode for a processes emulation root is saved in the cwdi structure
during process exec.
If the emulation root the TRYEMULROOT flag are set, namei() will do an initial
search for absolute pathnames in the emulation root, if that fails it will
retry from the normal root.
".." at the emulation root will always go to the real root, even in the middle
of paths and when expanding symlinks.
Absolute symlinks found using absolute paths in the emulation root will be
relative to the emulation root (so /usr/lib/xxx.so -> /lib/xxx.so links
inside the emulation root don't need changing).
If the root of the emulation would be returned (for an emulation lookup), then
the real root is returned instead (matching the behaviour of emul_lookup,
but being a cheap comparison here) so that programs that scan "../.."
looking for the root dircetory don't loop forever.
The target for symbolic links is no longer mangled (it used to get the
CHECK_ALT_xxx() treatment, so could get /emul/xxx prepended).
CHECK_ALT_xxx() are no more. Most of the change is deleting them, and adding
TRYEMULROOT to the flags to NDINIT().
A lot of the emulation system call stubs could now be deleted.

Change all the NETBSD32PTR64(SCARG(uap, xxx))) to SCARG_P32(uap, xxx).

remove all the double (and triple) casts used to convert 32bit userspace
pointers to and from 64bit kernel pointers. Instead use the defines
NETBSD32PTR64(p32) to read a 32bit pointer and (the new) NETBSD32PTR32(p32,p64)
to write a 32bit pointer throughout.
The 32bit pointer is now a struct to enforce the above.
amd64 (with linux emul) and sparc64 will both compile (when the arch stuff
goes in soon), and amd64 still runs some i386 binaries.

branches: 1.119.2; 1.119.4; 1.119.6;
fix fallout from caddr_t changes.

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

Introduce a new member to struct emul, e_startlwp, to be used by
sys__lwp_create. It allows using the said syscall under COMPAT_NETBSD32.

The libpthread regression tests now pass on amd64 and sparc64.

branches: 1.116.2;
Merge newlock2 to head.

deal with RLIM_INFINITY in the setrlimit case.

Simplify previous commit not to use dosetrlimit(), since we don't want the
kauth tests etc.

From Nicolas Joly:

> It seems that 32bits programs, running under compat_netbsd32, using
> setrlimit force all other programs to have their maximum data size
> fixed at 3GB, where native 64bits apps used 8GB previously.

I tracked this one to the `netbsd32_adjust_limits()' function (called
when creating a new process under compat_netbsd32), where data and
stack limits are set without checking for shared `p_limit' structure
(p_limit->p_refcnt > 1). This explain the side effect where processes
have their limits changed when a compat_netbsd32 (or compat_linux32)
program is run.

The fix is to use `dosetrlimit()' to ensure the needed copy-on-write
behaviour for shared structure.

Clean some KAUTH_GENERIC_ISSUSER usage in compat code.

branches: 1.111.2; 1.111.4;
When calling PTRACE from an LKM, use sysent[SYS_ptrace].sy_call in case
the sys_ptrace symbol isn't present.

Protect netbsd32_ptrace with options PTRACE.

Make filehandles opaque to userland

Use the LWP cached credentials where sane.

do not protect the getfh syscall by
#if defined(NFS) || defined(NFSSERVER).
The native syscall also isn't.

Fix alignement problems for fhandle_t, exposed by gcc4.1.

While touching all vptofh/fhtovp functions, get rid of VFS_MAXFIDSIZ,
version the getfh(2) syscall and explicitly pass the size available in
the filehandle from userland.

Discussed on tech-kern, with lots of help from yamt (thanks!).

version the socket(2) syscall. for compat30 socket, we use
EPROTONOSUPPORT instead of EAFNOSUPPORT.

from pavel@ with a little bit of clean up from myself.

XXX: netbsd32 (and perhaps other emulations) should be able
XXX: to call the standard socket calls for this i think, but
XXX: revisit this at another time.

branches: 1.104.4;
integrate kauth.

use socklen_t where appropriate.

Move fhstat as sys___fhstat30 in netbsd32_fs.c because it doesn't belong
to netbsd32_netbsd.c (which incidentally means it had been broken for a
while I guess). Add compat_30 version.

Implement the _lwp* and sa_* families of syscalls, using the newly
introduced hooks in the native code.

branches: 1.100.2; 1.100.4; 1.100.6;
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

branches: 1.99.2; 1.99.4; 1.99.6;
merge ktrace-lwp.

Fix lossage I created with the 64 bit ino_t change.

When returning 64bit values (from netbsd32_lseek) fix up the return
value vector (of 32bit values, most likely) via a MD macro.

Add the *xattr(2) family of syscalls. Just like the *extattr(2) family,
they're waiting for an actual FS back-end to be tested, but are still
straightforward enough.

Add rasctl(2). Thanks to the regression tests for that syscall, I was able
to discover the bugs in netbsd32_setitimer() and netbsd32_execve().

Add support for fsync_range(2).

Implement __clone(2).

Add mlockall(2) and munlockall(2).

Implement the extattr(3) family of syscalls.

XXX However, those remain untested as there are currently no backend for
XXX extattr(9) in NetBSD.

branches: 1.90.2;
Implement uuidgen(2).

track change to swapctl args in kern/syscalls.master.

Fix some things regarding COMPAT_NETBSD32 and limits/VM addresses.

* For sparc64 and amd64, define *SIZ32 VM constants.
* Add a new function pointer to struct emul, pointing at a function
that will return the default VM map address. The default function
is uvm_map_defaultaddr, which just uses the VM_DEFAULT_ADDRESS
macro. This gives emulations control over the default map address,
and allows things to be mapped at the right address (in 32bit range)
for COMPAT_NETBSD32.
* Add code to adjust the data and stack limits when a COMPAT_NETBSD32
or COMPAT_SVR4_32 binary is executed.
* Don't use USRSTACK in kern_resource.c, use p_vmspace->vm_minsaddr
instead (emulations might have set it differently)
* Since this changes struct emul, bump kernel version to 3.99.2

Tested on amd64, compile-tested on sparc64.

branches: 1.87.2;
nuke trailing whitespace

branches: 1.86.4; 1.86.6;
o Add support for the statvfs family of syscalls (statvfs1, fstatvfs1,
fhstatvfs1 and getvfsstat)
o Move the statfs family out of netbsd32_fs.c and netbsd32_netbsd.c to
netbsd_compat_20.c, compiled with COMPAT_20

Reviewed by christos@.

Add the missing 'v' to fhstatvfs1

try to make this compile. XXX: this will not work yet (hi simon)

Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.

use netbsd32_sigcode with COMPAT_16 only

fix a (syscall args) comment.

Put back Emmanuel's sigfilter hooks, as decided by Core.

Introduce lwp_emuldata and the associated hooks. No hook is provided for the
exec case, as the emulation already has the ability to intercept that
with the e_proc_exec hook. It is the responsability of the emulation to
take appropriaye action about lwp_emuldata in e_proc_exec.

Patch reviewed by Christos.

back the sigfilter emulation hook change off

Dynamic sysctl.

Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al. Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.

Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded. Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.

All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.

PS - I'm sorry, but there's a distinct lack of documentation at the
moment. I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.

Add a sigfilter emulation hook. It is used at the beginning of kpsignal2()
so that a specific emulation has the oportunity to filter out some signals.

if sigfilter returns 0, then no signal is sent by kpsignal2().

There is another place where signals can be generated: trapsignal. Since this
function is already an emulation hook, no call to the sigfilter hook was
introduced in trapsignal.

This is needed to emulate the softsignal feature in COMPAT_DARWIN (signals
sent as Mach exception messages)

Add necessary include file.

add support for non-executable mappings (where the hardware allows this)
and make the stack and heap non-executable by default. the changes
fall into two basic catagories:

- pmap and trap-handler changes. these are all MD:
= alpha: we already track per-page execute permission with the (software)
PG_EXEC bit, so just have the trap handler pay attention to it.
= i386: use a new GDT segment for %cs for processes that have no
executable mappings above a certain threshold (currently the
bottom of the stack). track per-page execute permission with
the last unused PTE bit.
= powerpc/ibm4xx: just use the hardware exec bit.
= powerpc/oea: we already track per-page exec bits, but the hardware only
implements non-exec mappings at the segment level. so track the
number of executable mappings in each segment and turn on the no-exec
segment bit iff the count is 0. adjust the trap handler to deal.
= sparc (sun4m): fix our use of the hardware protection bits.
fix the trap handler to recognize text faults.
= sparc64: split the existing unified TSB into data and instruction TSBs,
and only load TTEs into the appropriate TSB(s) for the permissions.
fix the trap handler to check for execute permission.
= not yet implemented: amd64, hppa, sh5

- changes in all the emulations that put a signal trampoline on the stack.
instead, we now put the trampoline into a uvm_aobj and map that into
the process separately.

originally from openbsd, adapted for netbsd by me.

branches: 1.73.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

struct proc * -> struct lwp *

Make sure to include opt_foo.h if a defflag option FOO is used.

Merge the nathanw_sa branch.

branches: 1.69.2;
After a discussion with various folks, fix the strict-alias warning
by ditching 'void *rt' and passing retval directly to sys_mmap().

Avoid strict-alias warnings.

set struct emul's nsysent to compat SYS_NSYSENT, not SYS_MAXSYSCALL

In preparation for COMPAT_NETBSD32 on SH-5:

- The MD netbsd32_machdep.h header now defines the 32-bit pointer type
instead of using u_int32_t everywhere,
- The MD netbsd32_machdep.h header now defines a macro (at least on
current implementations) which converts a 32-bit pointer to its 64-bit
equivalent,
- Change the MI code to utilise the above two items in all the right places,
- Implement netbsd32___sigaction_sigtramp().

Tested on Sparc64 by Matt Green.