syscall: FreeBSD 12 ino64 support

This is similar to CL 136816 for x/sys/unix, changing the FreeBSD ABI to use 64-bit inodes in
Stat_t, Statfs_t, and Dirent types.

The changes are forward compatible, that is FreeBSD 10.x, 11.x continue to use their current sysnum numbers.
The affected types are converted to the new layout (with some overhead).
Thus the same statically linked binary should work using the native sysnums (without any conversion) on FreeBSD 12.

Breaking API changes in package syscall are:
Mknod takes a uint64 (C dev_t) instead of int.
Stat_t: Dev, Ino, Nlink, Rdev, Gen became uint64.
  Atimespec, Mtimespec, Ctimespec, Birthtimespec renamed to Atim, Mtim, Ctim, Birthtim respectively.

Statfs_t: Mntonname and Mntfromname changed from [88]int8 to [1024]int8 arrays.

Dirent: Fileno became uint64, Namlen uint16 and an additional field Off int64 (currently unused) was added.

The following commands were run to generate ztypes_* and zsyscall_* on FreeBSD-12.0-ALPHA6 systems (GOARCH=386 were run on the same amd64 host):
GOOS=freebsd GOARCH=amd64 ./mksyscall.pl -tags freebsd,amd64 syscall_bsd.go syscall_freebsd.go syscall_freebsd_amd64.go |gofmt >zsyscall_freebsd_amd64.go
GOOS=freebsd GOARCH=amd64 go tool cgo -godefs types_freebsd.go | GOOS=freebsd GOARCH=amd64 go run mkpost.go >ztypes_freebsd_amd64.go

GOOS=freebsd GOARCH=386 ./mksyscall.pl -l32 -tags freebsd,386 syscall_bsd.go syscall_freebsd.go syscall_freebsd_386.go |gofmt >zsyscall_freebsd_386.go
GOOS=freebsd GOARCH=386 go tool cgo -godefs types_freebsd.go | GOOS=freebsd GOARCH=386 go run mkpost.go >ztypes_freebsd_386.go

GOOS=freebsd GOARCH=arm ./mksyscall.pl -l32 -arm -tags freebsd,arm syscall_bsd.go syscall_freebsd.go syscall_freebsd_arm.go |gofmt >zsyscall_freebsd_arm.go
GOOS=freebsd GOARCH=arm go tool cgo -godefs -- -fsigned-char types_freebsd.go | GOOS=freebsd GOARCH=arm go run mkpost.go >ztypes_freebsd_arm.go

The Kevent struct was changed to use the FREEBSD_COMPAT11 version always (requiring the COMPAT_FREEBSD11 kernel option FreeBSD-12, this is the default).

The definitions of ifData were not updated, their functionality in has have been replaced by vendored golang.org/x/net/route.

freebsdVersion initialization was dropped from init() in favor of a sync.Once based wrapper - supportsABI().

Updates #22448.

Change-Id: I359b756e2849c036d7ed7f75dbd6ec836e0b90b4
Reviewed-on: https://go-review.googlesource.com/c/138595
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

1 files changed, 98 insertions, 0 deletions

diff --git a/api/except.txt b/api/except.txt
index 90b79f1592..a911783c6b 100644
--- a/api/except.txt
+++ b/api/except.txt
@@ -383,3 +383,101 @@ pkg syscall (windows-amd64), type CertRevocationInfo struct, CrlInfo uintptr
 pkg syscall (windows-amd64), type CertRevocationInfo struct, OidSpecificInfo uintptr
 pkg syscall (windows-amd64), type CertSimpleChain struct, TrustListInfo uintptr
 pkg syscall (windows-amd64), type RawSockaddrAny struct, Pad [96]int8
+pkg syscall (freebsd-386), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-386), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-386), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-386), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-386), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-386), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-386), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-386), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-386), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-386), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-386), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-386), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-386), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-386), type Stat_t struct, Pad_cgo_0 [8]uint8
+pkg syscall (freebsd-386), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-386), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-386), type Statfs_t struct, Mntonname [88]int8
+pkg syscall (freebsd-386-cgo), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-386-cgo), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-386-cgo), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Pad_cgo_0 [8]uint8
+pkg syscall (freebsd-386-cgo), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-386-cgo), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-386-cgo), type Statfs_t struct, Mntonname [88]int8
+pkg syscall (freebsd-amd64), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-amd64), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-amd64), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-amd64), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-amd64), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-amd64), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-amd64), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-amd64), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-amd64), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-amd64), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-amd64), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-amd64), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-amd64), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-amd64), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-amd64), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-amd64), type Statfs_t struct, Mntonname [88]int8
+pkg syscall (freebsd-amd64-cgo), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-amd64-cgo), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-amd64-cgo), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-amd64-cgo), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-amd64-cgo), type Statfs_t struct, Mntonname [88]int8
+pkg syscall (freebsd-arm), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-arm), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-arm), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-arm), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-arm), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-arm), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-arm), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-arm), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-arm), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-arm), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-arm), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-arm), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-arm), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-arm), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-arm), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-arm), type Statfs_t struct, Mntonname [88]int8
+pkg syscall (freebsd-arm-cgo), func Mknod(string, uint32, int) error
+pkg syscall (freebsd-arm-cgo), type Dirent struct, Fileno uint32
+pkg syscall (freebsd-arm-cgo), type Dirent struct, Namlen uint8
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Atimespec Timespec
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Birthtimespec Timespec
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Blksize uint32
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Ctimespec Timespec
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Dev uint32
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Gen uint32
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Ino uint32
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Lspare int32
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Mtimespec Timespec
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Nlink uint16
+pkg syscall (freebsd-arm-cgo), type Stat_t struct, Rdev uint32
+pkg syscall (freebsd-arm-cgo), type Statfs_t struct, Mntfromname [88]int8
+pkg syscall (freebsd-arm-cgo), type Statfs_t struct, Mntonname [88]int8