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Yuval Pavel Zholkover 5535b4e6bf unix: FreeBSD 12 ino64 support 
Background:
The 64-bit inode project was merged into the upcoming FreeBSD 12 release.
It changes the ABI for structs holding inodes: stat, statfs, dirent.
New system call numbers were introduced which accept the new struct layouts,
the old ones were marked as COMPAT11.
Their equivalent libc wrappers are using ELF symbol versioning.
The new wrappers have moved from @FBSD_1.0 to @FBSD_1.5.

Backward and forward compatability is achieved by always using the new struct
layouts while converting the old struct instance to the new layout on old kernels.
https://svnweb.freebsd.org/base?view=revision&revision=318736
https://svnweb.freebsd.org/base?view=revision&revision=320278

The same approach is used for Go:
The new Stat_t, Statfs_t and Dirent types hold 64-bit inodes and additional ABI
changes, they are generated from their C definitions in FreeBSD-12 using cgo -godefs.
Each type has an unexported *_freebsd11 counterpart generated the same way.
Previous directly exposed syscalls like Fstat have now a wrapper in place calling
either fstat or fstat_freebsd12 zsyscall wrapper based on the kern.osreldate.
If an old syscall needs to be used, then the returned *_freebsd11 result is converted
to the new layout before returning from the wrapper.

Introduce supportsABI() call to check the kern.osreldate sysctl for the ABI version.
Drop the old struct stat8 definition in favour of the <sys/stat.h> version.
Run the mktypes part of GOOS=freebsd GOARCH={386,amd64,arm} ./mkall.sh
on FreeBSD-12.0-ALPHA6 (r338675), updating all types except Kevent.

Expose Mknodat, both COMPAT11 version (currently missing) and the FreeBSD 12 one.
Some COMPAT11 syscalls have no direct FreeBSD 12 counterpart, in those cases
an *at(AT_FDCWD, ...) is used instead.

Updates golang/go#22448

Change-Id: I87940b88ae358db88103cdcd06f9cafbf4694cfc
Reviewed-on: https://go-review.googlesource.com/c/136816
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
 2018-10-22 06:42:59 +00:00
Yuval Pavel Zholkover e42485b6e2 unix: use vm.swap_total for FreeBSD TestSysctlUint64 
Fixes golang/go#21375

Change-Id: Ibb33df9d71eb3a935a1f8f9f0ad1f180211e8ce4
Reviewed-on: https://go-review.googlesource.com/54390
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2017-08-09 19:06:05 +00:00
Yuval Pavel Zholkover 47bdb838cc unix: fix freebsd/arm build, fix freebsd/{386,arm} tests 
Re-run mkall.sh on FreeBSD-11.1-RELEASE armv6 for Capsicum consts and
POSIX.1-2008 path relative *at() syscalls.

Add errors_freebsd_arm.go generated semi-automatically using:
https://gist.github.com/paulzhol/c6d54dc2baf2a6bd204b343a15459661
Similar to https://golang.org/cl/51570. In order to handle C enum based
constants that mkerrors.sh missed.

Use fix from https://golang.org/cl/53639 to run Capsicum tests only on amd64.

Fixes golang/go#21136

Change-Id: I9681b033531090e6b1c5e2446a442deb39cf3066
Reviewed-on: https://go-review.googlesource.com/53691
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2017-08-08 15:06:51 +00:00