Commit Graph

105 Commits

Author SHA1 Message Date
Ed Maste
00ce0c6258 makesyscalls: simplify capenabled pipeline
Replace cat + 2x grep with one grep.

Sponsored by:	Turing Robotic Industries
2018-06-11 18:57:40 +00:00
Brooks Davis
6469bdcdb6 Move most of the contents of opt_compat.h to opt_global.h.
opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.

Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c.  A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.

Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.

Reviewed by:	kib, cem, jhb, jtl
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14941
2018-04-06 17:35:35 +00:00
Brooks Davis
89ea4a30d6 Added SAL annotatations to system calls.
Modify makesyscalls.sh to strip out SAL annotations.

No functional change.

This is based on work I started in CheriBSD and use to validate fat
pointers at the syscall boundary.  Tal Garfinkel reviewed the changes,
added annotations to COMPAT* syscalls and is using them in a record and
playback framework.  One can envision other uses such as a WITNESS-like
validator for copyin/out as speculated on in the review.

As this time we are only annotating sys/kern/syscalls.master as that is
sufficient for userspace work.  If kernel use cases materialize, we can
annotate other syscalls.master as needed.

Submitted by:	Tal Garfinkel <talg@cs.stanford.edu>
Sponsored by:	DARPA, AFRL (in part)
Differential Revision:	https://reviews.freebsd.org/D14285
2018-04-05 20:31:45 +00:00
Ed Maste
37880089ac makesyscalls: permit a range of syscall numbers for UNIMPL
Some ABIs have large gaps in syscall numbers.  Allow gaps to be filled
as ranges of UNIMPL, with an entry like:

248-1023	AUE_NULL	UNIMPL	unimplemented

Reviewed by:	jhb, gnn
Sponsored by:	Turing Robotic Industries Inc.
Differential Revision:	https://reviews.freebsd.org/D14122
2018-01-30 18:29:38 +00:00
Jeff Roberson
3f289c3fcf Implement 'domainset', a cpuset based NUMA policy mechanism. This allows
userspace to control NUMA policy administratively and programmatically.

Implement domainset based iterators in the page layer.

Remove the now legacy numa_* syscalls.

Cleanup some header polution created by having seq.h in proc.h.

Reviewed by:	markj, kib
Discussed with:	alc
Tested by:	pho
Sponsored by:	Netflix, Dell/EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D13403
2018-01-12 22:48:23 +00:00
Konstantin Belousov
6992112349 Commit the 64-bit inode project.
Extend the ino_t, dev_t, nlink_t types to 64-bit ints.  Modify
struct dirent layout to add d_off, increase the size of d_fileno
to 64-bits, increase the size of d_namlen to 16-bits, and change
the required alignment.  Increase struct statfs f_mntfromname[] and
f_mntonname[] array length MNAMELEN to 1024.

ABI breakage is mitigated by providing compatibility using versioned
symbols, ingenious use of the existing padding in structures, and
by employing other tricks.  Unfortunately, not everything can be
fixed, especially outside the base system.  For instance, third-party
APIs which pass struct stat around are broken in backward and
forward incompatible ways.

Kinfo sysctl MIBs ABI is changed in backward-compatible way, but
there is no general mechanism to handle other sysctl MIBS which
return structures where the layout has changed. It was considered
that the breakage is either in the management interfaces, where we
usually allow ABI slip, or is not important.

Struct xvnode changed layout, no compat shims are provided.

For struct xtty, dev_t tty device member was reduced to uint32_t.
It was decided that keeping ABI compat in this case is more useful
than reporting 64-bit dev_t, for the sake of pstat.

Update note: strictly follow the instructions in UPDATING.  Build
and install the new kernel with COMPAT_FREEBSD11 option enabled,
then reboot, and only then install new world.

Credits: The 64-bit inode project, also known as ino64, started life
many years ago as a project by Gleb Kurtsou (gleb).  Kirk McKusick
(mckusick) then picked up and updated the patch, and acted as a
flag-waver.  Feedback, suggestions, and discussions were carried
by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles),
and Rick Macklem (rmacklem).  Kris Moore (kris) performed an initial
ports investigation followed by an exp-run by Antoine Brodin (antoine).
Essential and all-embracing testing was done by Peter Holm (pho).
The heavy lifting of coordinating all these efforts and bringing the
project to completion were done by Konstantin Belousov (kib).

Sponsored by:	The FreeBSD Foundation (emaste, kib)
Differential revision:	https://reviews.freebsd.org/D10439
2017-05-23 09:29:05 +00:00
Gleb Smirnoff
efe3b0de14 Remove SVR4 (System V Release 4) binary compatibility support.
UNIX System V Release 4 is operating system released in 1988. It ceased
to exist in early 2000-s.
2017-02-28 05:14:42 +00:00
John Baldwin
150599be12 Consolidate statements to initialize files.
Previously, the first lines of various generated files from system call
tables were generated in two sections.  Some of the initialization was
done in BEGIN, and the rest was done when the first line was encountered.
The main reason for this split before r313564 was that most of the
initialization done in the second section depended on the $FreeBSD$ tag
extracted from the system call table.  Now that the $FreeBSD$ tag is no
longer used, consolidate all of the file initialization in the BEGIN
section.

This change was tested by confirming that the content of generated files
did not change.
2017-02-20 20:37:25 +00:00
John Baldwin
807a7231f2 Drop the "created from" line from files generated by makesyscalls.sh.
This information is less useful when the generated files are included in
source control along with the source.  If needed it can be reconstructed
from the $FreeBSD$ tag in the generated file.  Removing this information
from the generated output permits committing the generated files along
with the change to the system call master list without having inconsistent
metadata in the generated files.

Reviewed by:	emaste, kib
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D9497
2017-02-10 19:25:52 +00:00
Ed Maste
9e62195361 makesyscalls.sh: remove trailing space on the "created from" line
In r10905 and r10906 makesyscalls was modified to avoid emitting a
literal $Id$ string in the generated file, with:

    gsub("[$]Id: ", "", $0)
    gsub(" [$]", "", $0)

Then r11294 added some functionality and also tried to address the $Id$
problem in a different way, by removing every $:

    sed -e 's/\$//g ...

This rendered the gsub infeffective. The gsub was later updated to
track the $Id$ -> $FreeBSD$ switch, even though it did not do anything.

Revert the addition of the s/\$//g, and update the gsub to keep the
resulting format the same.

Discussed with:	bde
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2016-10-17 13:52:24 +00:00
Mark Johnston
5a4dfc8d83 Annotate syscall provider pointer arguments with the "userland" keyword.
This causes dtrace to automatically copyin arguments from userland, so
one no longer has to explicitly use the copyin() action to do so. Moreover,
copyin() on userland addresses is a no-op, so existing scripts should be
unaffected by this change.

Discussed with:	rstone
MFC after:	2 weeks
2016-09-22 04:49:31 +00:00
Bryan Drewery
417d5dec39 Still provide freebsd10_* symbols from libc for COMPAT10.
r296773 was done to only remove libc symbols for <7.  We want to provide
the syscall symbols going forward for 7+.

Discussed with:	jhb
MFC after:	3 days
Sponsored by:	EMC / Isilon Storage Division
2016-08-04 19:14:18 +00:00
Brooks Davis
e52e02ba24 Add support for COMPAT10 keywords in syscalls.master.
Approved by:	re (gjb)
Sponsored by:	DARPA, AFRL
2016-06-22 21:12:53 +00:00
John Baldwin
f479b2ac89 Do not include system call wrappers in libc for old FreeBSD system calls.
The base system libc is only used to run binaries built on FreeBSD 7.0 and
later.  It does not need to include system call wrappers for system calls
only used by FreeBSD binaries built on versions older than 7.0.  This was
already true for "COMPAT" system calls, but now wrappers for system calls
used on FreeBSD 4 and 6 are excluded as well.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D5597
2016-03-12 22:53:46 +00:00
John Baldwin
2f99bcce1e Rename remaining linux32 symbols such as linux_sysent[] and
linux_syscallnames[] from linux_* to linux32_* to avoid conflicts with
linux64.ko.  While here, add support for linux64 binaries to systrace.
- Update NOPROTO entries in amd64/linux/syscalls.master to match the
  main table to fix systrace build.
- Add a special case for union l_semun arguments to the systrace
  generation.
- The systrace_linux32 module now only builds the systrace_linux32.ko.
  module on amd64.
- Add a new systrace_linux module that builds on both i386 and amd64.
  For i386 it builds the existing systrace_linux.ko.  For amd64 it
  builds a systrace_linux.ko for 64-bit binaries.

Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D3954
2015-10-22 21:28:20 +00:00
Ed Schouten
6d338f9a81 Import the CloudABI datatypes and create a system call table.
CloudABI is a pure capability-based runtime environment for UNIX. It
works similar to Capsicum, except that processes already run in
capabilities mode on startup. All functionality that conflicts with this
model has been omitted, making it a compact binary interface that can be
supported by other operating systems without too much effort.

CloudABI is 'secure by default'; the idea is that it should be safe to
run arbitrary third-party binaries without requiring any explicit
hardware virtualization (Bhyve) or namespace virtualization (Jails). The
rights of an application are purely determined by the set of file
descriptors that you grant it on startup.

The datatypes and constants used by CloudABI's C library (cloudlibc) are
defined in separate files called syscalldefs_mi.h (pointer size
independent) and syscalldefs_md.h (pointer size dependent). We import
these files in sys/contrib/cloudabi and wrap around them in
cloudabi*_syscalldefs.h.

We then add stubs for all of the system calls in sys/compat/cloudabi or
sys/compat/cloudabi64, depending on whether the system call depends on
the pointer size. We only have nine system calls that depend on the
pointer size. If we ever want to support 32-bit binaries, we can simply
add sys/compat/cloudabi32 and implement these nine system calls again.

The next step is to send in code reviews for the individual system call
implementations, but also add a sysentvec, to allow CloudABI executabled
to be started through execve().

More information about CloudABI:
- GitHub: https://github.com/NuxiNL/cloudlibc
- Talk at BSDCan: https://www.youtube.com/watch?v=SVdF84x1EdA

Differential Revision:	https://reviews.freebsd.org/D2848
Reviewed by:	emaste, brooks
Obtained from:	https://github.com/NuxiNL/freebsd
2015-07-09 07:20:15 +00:00
Pawel Jakub Dawidek
82845da3fa Fix syscalls that can be loaded as kernel modules - they were not given
the flag allowing to call them from capability mode sandbox.

Noticed by:	David Drysdale <drysdale@google.com>
2013-12-15 23:19:42 +00:00
Pawel Jakub Dawidek
53449c98b7 Break the loop once we know we have the SYF_CAPENABLED flag. 2013-12-04 00:10:37 +00:00
Ed Maste
ec7935bfef Error out on failure to open specified config file 2013-10-16 17:03:46 +00:00
Mark Johnston
f17f2ffcdd Omit "__restrict" when generating syscall argument strings. DTrace doesn't
handle it and cannot determine the argument type when it's present.

Approved by:	re (gjb)
MFC after:	1 week
2013-09-21 23:05:44 +00:00
John Baldwin
ed749cf183 Fix the type of the idtype argument to wait6() in syscalls.master.
(Accidentally missed this in the previous commit)

Approved by:	re (kib)
MFC after:	1 week
2013-09-12 18:01:13 +00:00
Lawrence Stewart
cf13a58510 - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate()
system calls to provide feed-forward clock management capabilities to
  userspace processes. ffclock_getcounter() returns the current value of the
  kernel's feed-forward clock counter. ffclock_getestimate() returns the current
  feed-forward clock parameter estimates and ffclock_setestimate() updates the
  feed-forward clock parameter estimates.

- Document the syscalls in the ffclock.2 man page.

- Regenerate the script-derived syscall related files.

Committed on behalf of Julien Ridoux and Darryl Veitch from the University of
Melbourne, Australia, as part of the FreeBSD Foundation funded "Feed-Forward
Clock Synchronization Algorithms" project.

For more information, see http://www.synclab.org/radclock/

Submitted by:	Julien Ridoux (jridoux at unimelb edu au)
2011-11-21 01:26:10 +00:00
Ryan Stone
493b584dbd Correct the types of the arguments to return probes of the syscall
provider.  Previously we were erroneously supplying the argument types of
the corresponding entry probe.

Reviewed by:	rpaulo
MFC after:	1 week
2011-11-11 03:49:42 +00:00
Kip Macy
8451d0dd78 In order to maximize the re-usability of kernel code in user space this
patch modifies makesyscalls.sh to prefix all of the non-compatibility
calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel
entry points and all places in the code that use them. It also
fixes an additional name space collision between the kernel function
psignal and the libc function of the same name by renaming the kernel
psignal kern_psignal(). By introducing this change now we will ease future
MFCs that change syscalls.

Reviewed by:	rwatson
Approved by:	re (bz)
2011-09-16 13:58:51 +00:00
Andriy Gapon
56ede1074e add DTrace systrace support for linux32 and freebsd32 on amd64 syscalls
This commits makes necessary changes in syscall/sysent generation
infrastructure.

PR:		kern/152822
Submitted by:	Artem Belevich <fbsdlist@src.cx>
Reviewed by:	jhb (ealier version)
MFC after:	3 weeks
2011-03-12 08:51:43 +00:00
Robert Watson
08e6d9fad8 Continue to introduce Capsicum Capability Mode support:
Add a new system call flag, SYF_CAPENABLED, which indicates that a
particular system call is available in capability mode.

Add a new configuration file, kern/capabilities.conf (similar files
may be introduced for other ABIs in the future), which enumerates
system calls that are available in capability mode.  When a new
system call is added to syscalls.master, it will also need to be
added here (if needed).  Teach sysent parts to use this file to set
values for SYF_CAPENABLED for the native ABI.

Reviewed by:	anderson
Discussed with:	benl, kris, pjd
Obtained from:	Capsicum Project
MFC after:	3 months
2011-03-01 13:28:27 +00:00
Konstantin Belousov
153ac44cf6 Count number of threads that enter and leave dynamically registered
syscalls. On the dynamic syscall deregistration, wait until all
threads leave the syscall code. This somewhat increases the safety
of the loadable modules unloading.

Reviewed by:	jhb
Tested by:	pho
MFC after:	1 month
2010-06-28 18:06:46 +00:00
Ed Schouten
60ae52f785 Use ISO C99 integer types in sys/kern where possible.
There are only about 100 occurences of the BSD-specific u_int*_t
datatypes in sys/kern. The ISO C99 integer types are used here more
often.
2010-06-21 09:55:56 +00:00
Ed Schouten
790f66db55 Remove unused LIBCOMPAT keyword from syscalls.master. 2010-02-08 10:02:01 +00:00
John Baldwin
3c366f1f14 Add a new COMPAT7 flag for FreeBSD 7.x compatibility system calls. 2009-06-24 13:36:37 +00:00
John Baldwin
773fa740c9 Include definitions for the audit identifiers for compat system calls in
sysproto.h.  This makes it possible to use SYSCALL_MODULE() for compat
system calls that live in kernel modules.
2009-06-22 20:14:10 +00:00
John Baldwin
21def99b51 - Add the ability to mix multiple flags seperated by pipe ('|') characters
in the type field of system call tables.  Specifically, one can now use
  the 'NO*' types as flags in addition to the 'COMPAT*' types.  For example,
  to tag 'COMPAT*' system calls as living in a KLD via NOSTD.  The COMPAT*
  type is required to be listed first in this case.
- Add new functions 'type()' and 'flag()' to the embedded awk script in
  makesyscalls.sh that return true if a requested flag is found in the
  type field ($3).  The flag() function checks all of the flags in the
  field, but type() only checks the first flag.  type() is meant to be
  used in the top-level "switch" statement and flag() should be used
  otherwise.
- Retire the CPT_NOA type, it is now replaced with "COMPAT|NOARGS" using
  the flags approach.
- Tweak the comment descriptions of COMPAT[46] system calls so that they
  say "freebsd[46] foo" rather than "old foo".
- Document the COMPAT6 type.
- Sync comments in compat32 syscall table with the master table.
2009-06-17 19:50:38 +00:00
John Baldwin
0ec0b41cf6 Remove the now-unused NOIMPL flag. It serves no useful purpose given the
existing UNIMPL and NOSTD types.
2009-06-17 18:46:14 +00:00
Robert Watson
46c10f272c Add 'sy_flags', a currently unused per-syscall entry flags field that will
see future use in 9-CURRENT and 8-STABLE for features such as the
capability-mode enable flag and pay-as-you-audit.

Discussed with:	jhb, sson
2009-06-01 16:13:06 +00:00
John Baldwin
48a43ae819 Tidy up a few things with syscall generation:
- Instead of using a syscall slot (370) just to get a function prototype
  for lkmressys(), add an explicit function prototype to <sys/sysent.h>.
  This also removes unused special case checks for 'lkmressys' from
  makesyscalls.sh.
- Instead of having magic logic in makesyscalls.sh to only generate a
  function prototype the first time 'lkmnosys' is seen, make 'NODEF'
  always not generate a function prototype and include an explicit
  prototype for 'lkmnosys' in <sys/sysent.h>.
- As a result of the fix in (2), update the LKM syscall entries in
  the freebsd32 syscall table to use 'lkmnosys' rather than 'nosys'.
- Use NOPROTO for the __syscall() entry (198) in the native ABI.  This
  avoids the need for magic logic in makesyscalls.h to only generate
  a function prototype the first time 'nosys' is encountered.
2008-09-25 20:07:42 +00:00
John Birrell
e994ea8e55 Generate another function for the DTrace syscall provider to specify
the syscall argument types.

This code is only compiled into the systrace kernel modul and has no
effect otherwise.
2008-03-27 01:53:44 +00:00
Ruslan Ermilov
7f64829a5e Fixed type of the fourth argument of cpuset_{get,set}affinity(2) to be size_t.
Prodded by:	davidxu
2008-03-25 09:11:53 +00:00
Peter Wemm
9f0482e515 Add support for COMPAT6 syscalls.
Also, change the visibility of compat syscalls a slightly.  Compat
syscalls were missing from 'syscalls.h' entirely.  This additionally adds
them with their compat prefix.  eg: SYS_freebsd6_mmap.

Also, the syscalls.c names strings have different prefixes to differentiate
syscalls. Instead of several "old.mmap" strings, there will now be a
"compat.mmap" and "compat6.mmap" etc.  Before, both would have had the
same "old.mmap" label.

Approved by:  re
2007-07-04 22:38:28 +00:00
Tom Rhodes
6aeb05d7be Merge posix4/* into normal kernel hierarchy.
Reviewed by:	glanced at by jhb
Approved by:	silence on -arch@ and -standards@
2006-11-11 16:26:58 +00:00
John Baldwin
52a79796c4 Add a new set of macros <prefix>_AUE_<syscallname> to sysproto.h that
map to the audit event associated with a specific system call.  For
example, SYS_AUE___semctl would be set to AUE_SEMCTL in sys/sysproto.h.
2006-08-15 17:09:32 +00:00
John Birrell
1533c33fd4 Generate another file called systrace_args.c. This will be compiled
into systrace and is used to map the syscall arguments into the 64-bit
parameter array.
2006-08-03 05:29:09 +00:00
David Xu
64511d2abc Don't include sys/thr.h and umtx.h in sys/sysproto.h, it is unnecessary. 2006-08-02 08:09:24 +00:00
John Baldwin
af5bf12239 Now that all system calls are MPSAFE, retire the SYF_MPSAFE flag used to
mark system calls as being MPSAFE:
- Stop conditionally acquiring Giant around system call invocations.
- Remove all of the 'M' prefixes from the master system call files.
- Remove support for the 'M' prefix from the script that generates the
  syscall-related files from the master system call files.
- Don't explicitly set SYF_MPSAFE when registering nfssvc.
2006-07-28 19:05:28 +00:00
Robert Watson
f3596e3370 Introduce a new field in the syscalls.master file format to hold the
audit event identifier associated with each system call, which will
be stored by makesyscalls.sh in the sy_auevent field of struct sysent.
For now, default the audit identifier on all system calls to AUE_NULL,
but in the near future, other BSM event identifiers will be used.  The
mapping of system calls to event identifiers is many:one due to
multiple system calls that map to the same end functionality across
compatibility wrappers, ABI wrappers, etc.

Submitted by:	wsalamon
Obtained from:	TrustedBSD Project
2005-05-30 15:09:18 +00:00
Peter Wemm
1a58b07149 Remove the namespace column from the syscalls tables. We don't actually
use it, if we ever did.  They have been been VERY poorly maintained for
some time, possibly because they were a NOP.  FWIW, This brings our table
formats back closer to the other *BSD's.
2003-12-23 03:50:43 +00:00
Jeff Roberson
6eeb9653aa - Include umtx.h in files generated by makesyscalls.sh
- Add system calls for umtx.
2003-04-01 01:12:24 +00:00
Jeff Roberson
90e38817b7 - We now have to include umtx.h and ucontext.h in the system call related
headers.
2003-04-01 00:35:12 +00:00
David Malone
6bd34a1e6f The syscall names are string constants, so make them consts. 2002-10-29 15:47:06 +00:00
Alfred Perlstein
6d5dec35b7 Add the rest of the kernel support for the sem_ API in kern/uipc_sem.c.
Option 'P1003_1B_SEMAPHORES' to compile them in, or load the "sem" module
to activate them.

Have kern/makesyscalls.sh emit an include for sys/_semaphore.h into sysproto.h
to pull in the typedef for semid_t.

Add the syscalls to the syscall table as module stubs.
2002-09-19 00:43:32 +00:00
Alfred Perlstein
074453c230 Introduce syscall.master option 'COMPAT4' which allows one to wrap
syscalls for FreeBSD 4 compatibility.
Add kernel option COMPAT_FREEBSD4 to enable these syscalls.
2002-07-12 06:38:34 +00:00