Add basic support for IBM Z (s390x) CPU feature (known as
'facilities') detection.

Note that some of these features are mandatory when using the Go
compiler (for example, ldisp and eimm) but aren't mandatory when
using gccgo.

Cryptographic function detection is not yet implemented for
gccgo.

Change-Id: Ic6494d0df0bc1c1ad1713c9ff11ae23fba03d215
Reviewed-on: https://go-review.googlesource.com/c/163003Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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On Android /proc/self/auxv is not readable, leading to a panic in init.
Instead of panic'ing in this case, introduce the Initialized global bool
to report whether the CPU features were initialized i.e. /proc/self/auxv
was successfullly read.

Fixes golang/go#30413

Change-Id: Ib520f202990614a76bceb0bf9d19a88eadd13e10
Reviewed-on: https://go-review.googlesource.com/c/164057Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change adds a go.mod file to this repo, following the
requirements stated in bcmills's comment here:
https://golang.org/issue/28136#issuecomment-462971974. It's
important to note that we will not be
adding versions to the repo for now.

This change does not add a go.sum because this repo has no dependencies.

The change was generated by running "go mod init" and "go mod tidy" using Go
1.11.5 in the top-level directory of the repository.

Updates golang/go#28136

Change-Id: If6945f4bb17f7c84b53445054140ce9389767d89
Reviewed-on: https://go-review.googlesource.com/c/162977
Run-TryBot: Michael Matloob <matloob@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

TestDup used a file descriptor without ensuring it was free,
leading to rare crashes in the runtime netpoller when the victim fd
was the polling descriptor.

Updates golang/go#29423

Change-Id: Idc8b6b47f7e966e045f57f2028e7b6b79e0fb3f3
Reviewed-on: https://go-review.googlesource.com/c/163638Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

Change-Id: I06997987f2d54a1fbca098878a3bac473ec1bfc0
Reviewed-on: https://go-review.googlesource.com/c/163379
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Add the SetsockoptCanRawFilter func and CanFilter type to allow kernel
message filtering on AF_CAN sockets.

Fixes golang/go#29638

Change-Id: I4042825527ba2bc9aeb8dbe70d1960a06b15c29e
Reviewed-on: https://go-review.googlesource.com/c/163318
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Adding this helper enables me to eliminate some nasty code which
invokes unix.Syscall6 directly, and which has 32-bit shims for
invoking setsockopt properly on 32-bit Linux.

Change-Id: I53ef411e4c96cef557999261760cddc00df58d8a
Reviewed-on: https://go-review.googlesource.com/c/163303
Run-TryBot: Matt Layher <mdlayher@gmail.com>
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The current implementation for ppc64{,le} only supports linux (through
HWCaps read from /proc/self/auxv) and fails to build e.g. on
aix/ppc64.

Change-Id: I5e1efe75c781fd08bc7bbe797df88295726ba62b
Reviewed-on: https://go-review.googlesource.com/c/162798
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

x/sys/unix is vendored into the standard library, and the commit hook
for the standard library requires files to be gofmt-clean.

Updates golang/go#26924

Change-Id: I22a994062bcdbebe8a1fe1ae0ed4606837f03079
Reviewed-on: https://go-review.googlesource.com/c/162990Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates golang/go#28387

Change-Id: Ibcdc3f9cb3dc43b86b7e7d3539ed592219e54aba
Reviewed-on: https://go-review.googlesource.com/c/162987
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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These are an implementation detail and should not have been
exported. This only affects Linux on platforms other than 386 and
amd64.

Fixes golang/go#30255.

Change-Id: Ib23b42a7309fd6093b6b9d8b6628de222a3928be
Reviewed-on: https://go-review.googlesource.com/c/163004
Run-TryBot: Michael Munday <mike.munday@ibm.com>
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The words in auxval are encoded in native byte order.

I haven't added a test. This fix will be tested when s390x support
is added to the package.

Change-Id: I276f833660e6906c319995798faf9054ffc69461
Reviewed-on: https://go-review.googlesource.com/c/162902
Run-TryBot: Michael Munday <mike.munday@ibm.com>
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The current implementation for arm64 only supports linux (through HWCaps
read from /proc/self/auxv) and fails to build e.g. on darwin/arm64.

Fixes golang/go#30237

Change-Id: I9f32a285760795441a829b0a81b2d5aff04e2dc4
Reviewed-on: https://go-review.googlesource.com/c/162797
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Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Update references to mksyscall*.pl and mksysnum*.pl Perl scripts in
"README.md" with mksyscall*.go and mksysnum*.go Go programs.

Updates golang/go#27779

Change-Id: Ide3f5d9894c91aa6103d6bbe5ec64a47c969daa7
Reviewed-on: https://go-review.googlesource.com/c/162278Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

Port mksyscall_solaris.pl Perl script to mksyscall_solaris.go.
mkall.sh script is modified to run mksyscall_solaris.go. Running
mkall.sh does not generate any git diff besides the command
name in comments of generated files.

Updates golang/go#27779

Change-Id: I773c9732a882780400a06f578c00e455e133231b
Reviewed-on: https://go-review.googlesource.com/c/162277
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Updates golang/go#25633

Change-Id: I20ff2d0cda642fb7b155d3ae06499e8c0ef0a2b2
Reviewed-on: https://go-review.googlesource.com/c/161721
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I77f491029a8f2e37ffbda3d0f50795287d6cd641
Reviewed-on: https://go-review.googlesource.com/c/161720
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

If you don't set GOOS and you try to regenerate
the darwin files, it appears to succeed.
However, because libc was not selected,
it generates broken code.

Change-Id: I20fb4f51dcc539a03b6c6ed03ce39b78d5987d41
Reviewed-on: https://go-review.googlesource.com/c/161719
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Drop the manually defined *_XDP constants which were added to glibc.
Install python3 instead of python because glibc's confugure script now
requires at least 3.4.

Change-Id: Ic19ff4d8aa4dbadeb5438e331ccafeafc2cc9925
Reviewed-on: https://go-review.googlesource.com/c/160957
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This is a very classic and highly useful Windows API that I'm surprised
it's still not here.

Change-Id: If54319099cd94dd727126c579dd5a681979321cd
Reviewed-on: https://go-review.googlesource.com/c/160937
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Change mode of mksyscall_aix_ppc64.go to 644.

Change-Id: Icebc0944a739b58111f5420ec2f0850b348f1fee
Reviewed-on: https://go-review.googlesource.com/c/160918Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I79c721d0f4fe097daf096dc7404675aa3048bf6a
Reviewed-on: https://go-review.googlesource.com/c/160757
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I2d0094d64ba12f888758aeebdb43aed353ddeeb9
Reviewed-on: https://go-review.googlesource.com/c/160577
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Add IoctlGetRTCTime and IoctlSetRTCTime to get and set the RTC time via
the RTC_RD_TIME and RTC_SET_TIME ioctls.

Change-Id: I63190026be39746599c2cd7116603d4a1d5bd695
Reviewed-on: https://go-review.googlesource.com/c/160397
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Change-Id: I4e1facc318d87fdd2abca1de040fdcb25680339e
GitHub-Last-Rev: bfebe235283dd12d07c69609011e47f155ccc008
GitHub-Pull-Request: golang/sys#30
Reviewed-on: https://go-review.googlesource.com/c/159597Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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The zsysnum_{freebsd,netbsd}_arm64.go files were generated before
mksysnum was converted to Go in CL 152677. Regenerate them to adjust the
comment specifying the command used for generation.

Change-Id: I8f00249848fe20e388f255e9e615da1e0727c140
Reviewed-on: https://go-review.googlesource.com/c/159778
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It shouldn't make a difference for generating types and consts, but
let's use the glibc release branch anyway.

Fixes golang/go#29873

Change-Id: I15a3df250f5ae6181b2d036a10e0523ebe44ac3f
Reviewed-on: https://go-review.googlesource.com/c/158997Reviewed-by: Ian Lance Taylor <iant@golang.org>

Port mksyscall_aix_ppc64.pl Perl script to mksyscall_aix_ppc64.go.
mkall.sh script is modified to run mksyscall.go. Running
mkall.sh does not generate any git diff besides the command
name in comments of generated files.

Updates golang/go#27779

Change-Id: Ie888c0df470dcfc75034faa12cf3422b2d426629
Reviewed-on: https://go-review.googlesource.com/c/158699
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Also add additional packet timestamping constants and types defined
in the same header.

Change-Id: I4280f925b46e229f4c3a83a7fee4612592314016
Reviewed-on: https://go-review.googlesource.com/c/158761
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
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This isn't a real generation, it's mostly a copy of the amd64
files, due to difficulties in generation.

There should be little to no differences between netbsd 64bit
archs.

Change-Id: I1c7b25cfef87220c827018e73695e5ca08987156
GitHub-Last-Rev: 043207b2c25fbfe959e66bddc238d5b2f053a04f
GitHub-Pull-Request: golang/sys#27
Reviewed-on: https://go-review.googlesource.com/c/155738Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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On linux/riscv64, char defaults to unsigned, so explicitly make
RawSockaddrUnix.Path signed.

Patch by Ryan O'Leary.

Updates golang/go#27532

Change-Id: If99a3953462ad98f61d8fafcda3ebb71b44e6018
Reviewed-on: https://go-review.googlesource.com/c/157900
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

On linux/riscv64, the renameat syscall no longer exists and has been
superseded by renameat2. Use Renameat2 to implement Renameat on
linux/riscv64.

Based on a patch by Ryan O'Leary.

Updates golang/go#27532

Change-Id: I7c60c7f824750408265f67397b8ac1fa7226f425
Reviewed-on: https://go-review.googlesource.com/c/157899
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Also add a test now that all unices have Renameat.

Change-Id: I9098662569e9910122dc686559bbd04be06328fa
Reviewed-on: https://go-review.googlesource.com/c/157898
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

Also add the SFD_* constants and SignalfdSiginfo type.

Change-Id: I3415c212b85c9d5a940ba2bf70f43739a2630d78
Reviewed-on: https://go-review.googlesource.com/c/157897
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This adds the ClockNanosleep syscall and the TIMER_* constants;
currently only TIMER_ABSTIME for specifying an absolute timestamp.

Change-Id: Ic8d857eb92818529aadab569cd8646a19bb9c055
Reviewed-on: https://go-review.googlesource.com/c/157658
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Use the https:// URLs to get syscalls.master for freebsd, openbsd and
dragonfly. For netbsd, keep using the http:// URL since HTTPS is not
supported.

Change-Id: Ibcbd19d5e3b4585552ea65dcdc742c2e7bfce944
Reviewed-on: https://go-review.googlesource.com/c/157057
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Port mksyscall_aix_ppc.pl Perl script to mksyscall_aix_ppc.go.
mkall.sh script is modified to run mksyscall.go. Running
mkall.sh does not generate any git diff besides the command
name in comments of generated files.

Updates golang/go#27779

Change-Id: I57b0e5f9fe44dadd96d0e512046bb63e8e1b9f66
Reviewed-on: https://go-review.googlesource.com/c/156778Reviewed-by: Clément Chigot <clement.chigot@atos.net>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Port from Go internal/cpu.

Fixes golang/go#25185

Change-Id: Id3cac18da6ffec9d10df755c4032ce3068ab634d
Reviewed-on: https://go-review.googlesource.com/c/152938Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Modify unix/mksyscall.go to support plan9.
This does not generate any git diff besides the
command name in comments of generated files and
addition of +build tags.

Updates golang/go#27779

Change-Id: I359a80d1c08837d92a7095e5235867c29a2d2a60
Reviewed-on: https://go-review.googlesource.com/c/156157
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Missed this one.

Update golang/go#17490.

Change-Id: I5ab2197f9981b712b37d3060f72209bebcadf291
Reviewed-on: https://go-review.googlesource.com/c/156346
Run-TryBot: Keith Randall <khr@golang.org>
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