Apply patch

For golang/go#76791

Change-Id: I9500b38b17b5e3e141df8770d82c725c2ba8fd65
Cq-Include-Trybots: luci.golang.try:x_sys-gotip-windows-arm64
Reviewed-on: https://go-review.googlesource.com/c/sys/+/740880
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

cpu/cpu.go

@@ -92,9 +92,6 @@ var ARM64 struct {
 	HasSHA2     bool // SHA2 hardware implementation
 	HasCRC32    bool // CRC32 hardware implementation
 	HasATOMICS  bool // Atomic memory operation instruction set
-	HasHPDS     bool // Hierarchical permission disables in translations tables
-	HasLOR      bool // Limited ordering regions
-	HasPAN      bool // Privileged access never
 	HasFPHP     bool // Half precision floating-point instruction set
 	HasASIMDHP  bool // Advanced SIMD half precision instruction set
 	HasCPUID    bool // CPUID identification scheme registers

cpu/cpu_arm64.go

@@ -47,7 +47,7 @@ func archInit() {
 	switch runtime.GOOS {
 	case "freebsd":
 		readARM64Registers()
-	case "linux", "netbsd", "openbsd":
+	case "linux", "netbsd", "openbsd", "windows":
 		doinit()
 	default:
 		// Many platforms don't seem to allow reading these registers.
@@ -65,10 +65,10 @@ func setMinimalFeatures() {
 func readARM64Registers() {
 	Initialized = true
 
-	parseARM64SystemRegisters(getisar0(), getisar1(), getmmfr1(), getpfr0())
+	parseARM64SystemRegisters(getisar0(), getisar1(), getpfr0())
 }
 
-func parseARM64SystemRegisters(isar0, isar1, mmfr1, pfr0 uint64) {
+func parseARM64SystemRegisters(isar0, isar1, pfr0 uint64) {
 	// ID_AA64ISAR0_EL1
 	switch extractBits(isar0, 4, 7) {
 	case 1:
@@ -152,22 +152,6 @@ func parseARM64SystemRegisters(isar0, isar1, mmfr1, pfr0 uint64) {
 		ARM64.HasI8MM = true
 	}
 
-	// ID_AA64MMFR1_EL1
-	switch extractBits(mmfr1, 12, 15) {
-	case 1, 2:
-		ARM64.HasHPDS = true
-	}
-
-	switch extractBits(mmfr1, 16, 19) {
-	case 1:
-		ARM64.HasLOR = true
-	}
-
-	switch extractBits(mmfr1, 20, 23) {
-	case 1, 2, 3:
-		ARM64.HasPAN = true
-	}
-
 	// ID_AA64PFR0_EL1
 	switch extractBits(pfr0, 16, 19) {
 	case 0:

cpu/cpu_arm64.s

@@ -20,13 +20,6 @@ TEXT ·getisar1(SB),NOSPLIT,$0-8
 	MOVD	R0, ret+0(FP)
 	RET
 
-// func getmmfr1() uint64
-TEXT ·getmmfr1(SB),NOSPLIT,$0-8
-	// get Memory Model Feature Register 1 into x0
-	MRS	ID_AA64MMFR1_EL1, R0
-	MOVD	R0, ret+0(FP)
-	RET
-
 // func getpfr0() uint64
 TEXT ·getpfr0(SB),NOSPLIT,$0-8
 	// get Processor Feature Register 0 into x0

cpu/cpu_gc_arm64.go

@@ -8,6 +8,5 @@ package cpu
 
 func getisar0() uint64
 func getisar1() uint64
-func getmmfr1() uint64
 func getpfr0() uint64
 func getzfr0() uint64

cpu/cpu_gccgo_arm64.go

@@ -8,5 +8,4 @@ package cpu
 
 func getisar0() uint64 { return 0 }
 func getisar1() uint64 { return 0 }
-func getmmfr1() uint64 { return 0 }
 func getpfr0() uint64  { return 0 }

cpu/cpu_netbsd_arm64.go

@@ -167,7 +167,7 @@ func doinit() {
 		setMinimalFeatures()
 		return
 	}
-	parseARM64SystemRegisters(cpuid.aa64isar0, cpuid.aa64isar1, cpuid.aa64mmfr1, cpuid.aa64pfr0)
+	parseARM64SystemRegisters(cpuid.aa64isar0, cpuid.aa64isar1, cpuid.aa64pfr0)
 
 	Initialized = true
 }

cpu/cpu_openbsd_arm64.go

@@ -59,7 +59,7 @@ func doinit() {
 	if !ok {
 		return
 	}
-	parseARM64SystemRegisters(isar0, isar1, 0, 0)
+	parseARM64SystemRegisters(isar0, isar1, 0)
 
 	Initialized = true
 }

cpu/cpu_other_arm64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !linux && !netbsd && !openbsd && arm64
+//go:build !linux && !netbsd && !openbsd && !windows && arm64
 
 package cpu
 

cpu/cpu_windows_arm64.go

@@ -0,0 +1,42 @@
+// Copyright 2026 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cpu
+
+import (
+	"golang.org/x/sys/windows"
+)
+
+func doinit() {
+	// set HasASIMD and HasFP to true as per
+	// https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#base-requirements
+	//
+	// The ARM64 version of Windows always presupposes that it's running on an ARMv8 or later architecture.
+	// Both floating-point and NEON support are presumed to be present in hardware.
+	//
+	ARM64.HasASIMD = true
+	ARM64.HasFP = true
+
+	if windows.IsProcessorFeaturePresent(windows.PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) {
+		ARM64.HasAES = true
+		ARM64.HasPMULL = true
+		ARM64.HasSHA1 = true
+		ARM64.HasSHA2 = true
+	}
+	ARM64.HasSHA3 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE)
+	ARM64.HasCRC32 = windows.IsProcessorFeaturePresent(windows.PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE)
+	ARM64.HasSHA512 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE)
+	ARM64.HasATOMICS = windows.IsProcessorFeaturePresent(windows.PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE)
+	if windows.IsProcessorFeaturePresent(windows.PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE) {
+		ARM64.HasASIMDDP = true
+		ARM64.HasASIMDRDM = true
+	}
+	if windows.IsProcessorFeaturePresent(windows.PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE) {
+		ARM64.HasLRCPC = true
+		ARM64.HasSM3 = true
+	}
+	ARM64.HasSVE = windows.IsProcessorFeaturePresent(windows.PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
+	ARM64.HasSVE2 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
+	ARM64.HasJSCVT = windows.IsProcessorFeaturePresent(windows.PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE)
+}

cpu/cpu_x86.go

@@ -64,6 +64,80 @@ func initOptions() {
 
 func archInit() {
 
+	// From internal/cpu
+	const (
+		// eax bits
+		cpuid_AVXVNNI = 1 << 4
+
+		// ecx bits
+		cpuid_SSE3            = 1 << 0
+		cpuid_PCLMULQDQ       = 1 << 1
+		cpuid_AVX512VBMI      = 1 << 1
+		cpuid_AVX512VBMI2     = 1 << 6
+		cpuid_SSSE3           = 1 << 9
+		cpuid_AVX512GFNI      = 1 << 8
+		cpuid_AVX512VAES      = 1 << 9
+		cpuid_AVX512VNNI      = 1 << 11
+		cpuid_AVX512BITALG    = 1 << 12
+		cpuid_FMA             = 1 << 12
+		cpuid_AVX512VPOPCNTDQ = 1 << 14
+		cpuid_SSE41           = 1 << 19
+		cpuid_SSE42           = 1 << 20
+		cpuid_POPCNT          = 1 << 23
+		cpuid_AES             = 1 << 25
+		cpuid_OSXSAVE         = 1 << 27
+		cpuid_AVX             = 1 << 28
+
+		// "Extended Feature Flag" bits returned in EBX for CPUID EAX=0x7 ECX=0x0
+		cpuid_BMI1     = 1 << 3
+		cpuid_AVX2     = 1 << 5
+		cpuid_BMI2     = 1 << 8
+		cpuid_ERMS     = 1 << 9
+		cpuid_AVX512F  = 1 << 16
+		cpuid_AVX512DQ = 1 << 17
+		cpuid_ADX      = 1 << 19
+		cpuid_AVX512CD = 1 << 28
+		cpuid_SHA      = 1 << 29
+		cpuid_AVX512BW = 1 << 30
+		cpuid_AVX512VL = 1 << 31
+
+		// "Extended Feature Flag" bits returned in ECX for CPUID EAX=0x7 ECX=0x0
+		cpuid_AVX512_VBMI      = 1 << 1
+		cpuid_AVX512_VBMI2     = 1 << 6
+		cpuid_GFNI             = 1 << 8
+		cpuid_AVX512VPCLMULQDQ = 1 << 10
+		cpuid_AVX512_BITALG    = 1 << 12
+
+		// edx bits
+		cpuid_FSRM = 1 << 4
+		// edx bits for CPUID 0x80000001
+		cpuid_RDTSCP = 1 << 27
+	)
+	// Additional constants not in internal/cpu
+	const (
+		// eax=1: edx
+		cpuid_SSE2 = 1 << 26
+		// eax=1: ecx
+		cpuid_CX16   = 1 << 13
+		cpuid_RDRAND = 1 << 30
+		// eax=7,ecx=0: ebx
+		cpuid_RDSEED     = 1 << 18
+		cpuid_AVX512IFMA = 1 << 21
+		cpuid_AVX512PF   = 1 << 26
+		cpuid_AVX512ER   = 1 << 27
+		// eax=7,ecx=0: edx
+		cpuid_AVX5124VNNIW = 1 << 2
+		cpuid_AVX5124FMAPS = 1 << 3
+		cpuid_AMXBF16      = 1 << 22
+		cpuid_AMXTile      = 1 << 24
+		cpuid_AMXInt8      = 1 << 25
+		// eax=7,ecx=1: eax
+		cpuid_AVX512BF16 = 1 << 5
+		cpuid_AVXIFMA    = 1 << 23
+		// eax=7,ecx=1: edx
+		cpuid_AVXVNNIInt8 = 1 << 4
+	)
+
 	Initialized = true
 
 	maxID, _, _, _ := cpuid(0, 0)
@@ -73,90 +147,90 @@ func archInit() {
 	}
 
 	_, _, ecx1, edx1 := cpuid(1, 0)
-	X86.HasSSE2 = isSet(26, edx1)
+	X86.HasSSE2 = isSet(edx1, cpuid_SSE2)
 
-	X86.HasSSE3 = isSet(0, ecx1)
-	X86.HasPCLMULQDQ = isSet(1, ecx1)
-	X86.HasSSSE3 = isSet(9, ecx1)
-	X86.HasFMA = isSet(12, ecx1)
-	X86.HasCX16 = isSet(13, ecx1)
-	X86.HasSSE41 = isSet(19, ecx1)
-	X86.HasSSE42 = isSet(20, ecx1)
-	X86.HasPOPCNT = isSet(23, ecx1)
-	X86.HasAES = isSet(25, ecx1)
-	X86.HasOSXSAVE = isSet(27, ecx1)
-	X86.HasRDRAND = isSet(30, ecx1)
+	X86.HasSSE3 = isSet(ecx1, cpuid_SSE3)
+	X86.HasPCLMULQDQ = isSet(ecx1, cpuid_PCLMULQDQ)
+	X86.HasSSSE3 = isSet(ecx1, cpuid_SSSE3)
+	X86.HasFMA = isSet(ecx1, cpuid_FMA)
+	X86.HasCX16 = isSet(ecx1, cpuid_CX16)
+	X86.HasSSE41 = isSet(ecx1, cpuid_SSE41)
+	X86.HasSSE42 = isSet(ecx1, cpuid_SSE42)
+	X86.HasPOPCNT = isSet(ecx1, cpuid_POPCNT)
+	X86.HasAES = isSet(ecx1, cpuid_AES)
+	X86.HasOSXSAVE = isSet(ecx1, cpuid_OSXSAVE)
+	X86.HasRDRAND = isSet(ecx1, cpuid_RDRAND)
 
 	var osSupportsAVX, osSupportsAVX512 bool
 	// For XGETBV, OSXSAVE bit is required and sufficient.
 	if X86.HasOSXSAVE {
 		eax, _ := xgetbv()
 		// Check if XMM and YMM registers have OS support.
-		osSupportsAVX = isSet(1, eax) && isSet(2, eax)
+		osSupportsAVX = isSet(eax, 1<<1) && isSet(eax, 1<<2)
 
 		if runtime.GOOS == "darwin" {
 			// Darwin requires special AVX512 checks, see cpu_darwin_x86.go
 			osSupportsAVX512 = osSupportsAVX && darwinSupportsAVX512()
 		} else {
 			// Check if OPMASK and ZMM registers have OS support.
-			osSupportsAVX512 = osSupportsAVX && isSet(5, eax) && isSet(6, eax) && isSet(7, eax)
+			osSupportsAVX512 = osSupportsAVX && isSet(eax, 1<<5) && isSet(eax, 1<<6) && isSet(eax, 1<<7)
 		}
 	}
 
-	X86.HasAVX = isSet(28, ecx1) && osSupportsAVX
+	X86.HasAVX = isSet(ecx1, cpuid_AVX) && osSupportsAVX
 
 	if maxID < 7 {
 		return
 	}
 
 	eax7, ebx7, ecx7, edx7 := cpuid(7, 0)
-	X86.HasBMI1 = isSet(3, ebx7)
-	X86.HasAVX2 = isSet(5, ebx7) && osSupportsAVX
-	X86.HasBMI2 = isSet(8, ebx7)
-	X86.HasERMS = isSet(9, ebx7)
-	X86.HasRDSEED = isSet(18, ebx7)
-	X86.HasADX = isSet(19, ebx7)
+	X86.HasBMI1 = isSet(ebx7, cpuid_BMI1)
+	X86.HasAVX2 = isSet(ebx7, cpuid_AVX2) && osSupportsAVX
+	X86.HasBMI2 = isSet(ebx7, cpuid_BMI2)
+	X86.HasERMS = isSet(ebx7, cpuid_ERMS)
+	X86.HasRDSEED = isSet(ebx7, cpuid_RDSEED)
+	X86.HasADX = isSet(ebx7, cpuid_ADX)
 
-	X86.HasAVX512 = isSet(16, ebx7) && osSupportsAVX512 // Because avx-512 foundation is the core required extension
+	X86.HasAVX512 = isSet(ebx7, cpuid_AVX512F) && osSupportsAVX512 // Because avx-512 foundation is the core required extension
 	if X86.HasAVX512 {
 		X86.HasAVX512F = true
-		X86.HasAVX512CD = isSet(28, ebx7)
-		X86.HasAVX512ER = isSet(27, ebx7)
-		X86.HasAVX512PF = isSet(26, ebx7)
-		X86.HasAVX512VL = isSet(31, ebx7)
-		X86.HasAVX512BW = isSet(30, ebx7)
-		X86.HasAVX512DQ = isSet(17, ebx7)
-		X86.HasAVX512IFMA = isSet(21, ebx7)
-		X86.HasAVX512VBMI = isSet(1, ecx7)
-		X86.HasAVX5124VNNIW = isSet(2, edx7)
-		X86.HasAVX5124FMAPS = isSet(3, edx7)
-		X86.HasAVX512VPOPCNTDQ = isSet(14, ecx7)
-		X86.HasAVX512VPCLMULQDQ = isSet(10, ecx7)
-		X86.HasAVX512VNNI = isSet(11, ecx7)
-		X86.HasAVX512GFNI = isSet(8, ecx7)
-		X86.HasAVX512VAES = isSet(9, ecx7)
-		X86.HasAVX512VBMI2 = isSet(6, ecx7)
-		X86.HasAVX512BITALG = isSet(12, ecx7)
+		X86.HasAVX512CD = isSet(ebx7, cpuid_AVX512CD)
+		X86.HasAVX512ER = isSet(ebx7, cpuid_AVX512ER)
+		X86.HasAVX512PF = isSet(ebx7, cpuid_AVX512PF)
+		X86.HasAVX512VL = isSet(ebx7, cpuid_AVX512VL)
+		X86.HasAVX512BW = isSet(ebx7, cpuid_AVX512BW)
+		X86.HasAVX512DQ = isSet(ebx7, cpuid_AVX512DQ)
+		X86.HasAVX512IFMA = isSet(ebx7, cpuid_AVX512IFMA)
+		X86.HasAVX512VBMI = isSet(ecx7, cpuid_AVX512_VBMI)
+		X86.HasAVX5124VNNIW = isSet(edx7, cpuid_AVX5124VNNIW)
+		X86.HasAVX5124FMAPS = isSet(edx7, cpuid_AVX5124FMAPS)
+		X86.HasAVX512VPOPCNTDQ = isSet(ecx7, cpuid_AVX512VPOPCNTDQ)
+		X86.HasAVX512VPCLMULQDQ = isSet(ecx7, cpuid_AVX512VPCLMULQDQ)
+		X86.HasAVX512VNNI = isSet(ecx7, cpuid_AVX512VNNI)
+		X86.HasAVX512GFNI = isSet(ecx7, cpuid_AVX512GFNI)
+		X86.HasAVX512VAES = isSet(ecx7, cpuid_AVX512VAES)
+		X86.HasAVX512VBMI2 = isSet(ecx7, cpuid_AVX512VBMI2)
+		X86.HasAVX512BITALG = isSet(ecx7, cpuid_AVX512BITALG)
 	}
 
-	X86.HasAMXTile = isSet(24, edx7)
-	X86.HasAMXInt8 = isSet(25, edx7)
-	X86.HasAMXBF16 = isSet(22, edx7)
+	X86.HasAMXTile = isSet(edx7, cpuid_AMXTile)
+	X86.HasAMXInt8 = isSet(edx7, cpuid_AMXInt8)
+	X86.HasAMXBF16 = isSet(edx7, cpuid_AMXBF16)
 
 	// These features depend on the second level of extended features.
 	if eax7 >= 1 {
 		eax71, _, _, edx71 := cpuid(7, 1)
 		if X86.HasAVX512 {
-			X86.HasAVX512BF16 = isSet(5, eax71)
+			X86.HasAVX512BF16 = isSet(eax71, cpuid_AVX512BF16)
 		}
 		if X86.HasAVX {
-			X86.HasAVXIFMA = isSet(23, eax71)
-			X86.HasAVXVNNI = isSet(4, eax71)
-			X86.HasAVXVNNIInt8 = isSet(4, edx71)
+			X86.HasAVXIFMA = isSet(eax71, cpuid_AVXIFMA)
+			X86.HasAVXVNNI = isSet(eax71, cpuid_AVXVNNI)
+			X86.HasAVXVNNIInt8 = isSet(edx71, cpuid_AVXVNNIInt8)
 		}
 	}
 }
 
-func isSet(bitpos uint, value uint32) bool {
-	return value&(1<<bitpos) != 0
+func isSet(hwc uint32, value uint32) bool {
+	return hwc&value != 0
 }

unix/ioctl_signed.go

@@ -6,9 +6,7 @@
 
 package unix
 
-import (
-	"unsafe"
-)
+import "unsafe"
 
 // ioctl itself should not be exposed directly, but additional get/set
 // functions for specific types are permissible.
@@ -28,6 +26,13 @@ func IoctlSetPointerInt(fd int, req int, value int) error {
 	return ioctlPtr(fd, req, unsafe.Pointer(&v))
 }
 
+// IoctlSetString performs an ioctl operation which sets a string value
+// on fd, using the specified request number.
+func IoctlSetString(fd int, req int, value string) error {
+	bs := append([]byte(value), 0)
+	return ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
+}
+
 // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument.
 //
 // To change fd's window size, the req argument should be TIOCSWINSZ.

unix/ioctl_unsigned.go

@@ -6,9 +6,7 @@
 
 package unix
 
-import (
-	"unsafe"
-)
+import "unsafe"
 
 // ioctl itself should not be exposed directly, but additional get/set
 // functions for specific types are permissible.
@@ -28,6 +26,13 @@ func IoctlSetPointerInt(fd int, req uint, value int) error {
 	return ioctlPtr(fd, req, unsafe.Pointer(&v))
 }
 
+// IoctlSetString performs an ioctl operation which sets a string value
+// on fd, using the specified request number.
+func IoctlSetString(fd int, req uint, value string) error {
+	bs := append([]byte(value), 0)
+	return ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
+}
+
 // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument.
 //
 // To change fd's window size, the req argument should be TIOCSWINSZ.

unix/mkerrors.sh

@@ -256,6 +256,7 @@ struct ltchars {
 #include <linux/loop.h>
 #include <linux/lwtunnel.h>
 #include <linux/magic.h>
+#include <linux/mei.h>
 #include <linux/memfd.h>
 #include <linux/module.h>
 #include <linux/mount.h>
@@ -613,7 +614,7 @@ ccflags="$@"
 		$2 !~ /IOC_MAGIC/ &&
 		$2 ~ /^[A-Z][A-Z0-9_]+_MAGIC2?$/ ||
 		$2 ~ /^(VM|VMADDR)_/ ||
-		$2 ~ /^IOCTL_VM_SOCKETS_/ ||
+		$2 ~ /^(IOCTL_VM_SOCKETS_|IOCTL_MEI_)/ ||
 		$2 ~ /^(TASKSTATS|TS)_/ ||
 		$2 ~ /^CGROUPSTATS_/ ||
 		$2 ~ /^GENL_/ ||

unix/syscall_internal_linux_test.go

@@ -909,7 +909,7 @@ func sockaddrIUCVToAny(in RawSockaddrIUCV) *RawSockaddrAny {
 	var out RawSockaddrAny
 	copy(
 		(*(*[SizeofSockaddrAny]byte)(unsafe.Pointer(&out)))[:],
-		(*(*[SizeofSockaddrUnix]byte)(unsafe.Pointer(&in)))[:],
+		(*(*[SizeofSockaddrIUCV]byte)(unsafe.Pointer(&in)))[:],
 	)
 	return &out
 }

unix/syscall_solaris.go

@@ -1052,14 +1052,6 @@ func IoctlSetIntRetInt(fd int, req int, arg int) (int, error) {
 	return ioctlRet(fd, req, uintptr(arg))
 }
 
-func IoctlSetString(fd int, req int, val string) error {
-	bs := make([]byte, len(val)+1)
-	copy(bs[:len(bs)-1], val)
-	err := ioctlPtr(fd, req, unsafe.Pointer(&bs[0]))
-	runtime.KeepAlive(&bs[0])
-	return err
-}
-
 // Lifreq Helpers
 
 func (l *Lifreq) SetName(name string) error {

unix/syscall_unix.go

@@ -367,7 +367,9 @@ func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from
 		iov[0].SetLen(len(p))
 	}
 	var rsa RawSockaddrAny
-	n, oobn, recvflags, err = recvmsgRaw(fd, iov[:], oob, flags, &rsa)
+	if n, oobn, recvflags, err = recvmsgRaw(fd, iov[:], oob, flags, &rsa); err != nil {
+		return
+	}
 	// source address is only specified if the socket is unconnected
 	if rsa.Addr.Family != AF_UNSPEC {
 		from, err = anyToSockaddr(fd, &rsa)
@@ -389,8 +391,10 @@ func RecvmsgBuffers(fd int, buffers [][]byte, oob []byte, flags int) (n, oobn in
 		}
 	}
 	var rsa RawSockaddrAny
-	n, oobn, recvflags, err = recvmsgRaw(fd, iov, oob, flags, &rsa)
-	if err == nil && rsa.Addr.Family != AF_UNSPEC {
+	if n, oobn, recvflags, err = recvmsgRaw(fd, iov, oob, flags, &rsa); err != nil {
+		return
+	}
+	if rsa.Addr.Family != AF_UNSPEC {
 		from, err = anyToSockaddr(fd, &rsa)
 	}
 	return

unix/zerrors_linux.go

@@ -1615,6 +1615,8 @@ const (
 	IN_OPEN                                     = 0x20
 	IN_Q_OVERFLOW                               = 0x4000
 	IN_UNMOUNT                                  = 0x2000
+	IOCTL_MEI_CONNECT_CLIENT                    = 0xc0104801
+	IOCTL_MEI_CONNECT_CLIENT_VTAG               = 0xc0144804
 	IPPROTO_AH                                  = 0x33
 	IPPROTO_BEETPH                              = 0x5e
 	IPPROTO_COMP                                = 0x6c

unix/zerrors_linux_386.go

@@ -116,6 +116,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_amd64.go

@@ -116,6 +116,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_arm.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_arm64.go

@@ -120,6 +120,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_loong64.go

@@ -116,6 +116,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_mips.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x100
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x80
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/zerrors_linux_mips64.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x100
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x80
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/zerrors_linux_mips64le.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x100
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x80
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_mipsle.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x100
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x80
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_ppc.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x400
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/zerrors_linux_ppc64.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x400
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/zerrors_linux_ppc64le.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x400
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_riscv64.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xffffff0f
 	IPV6_FLOWLABEL_MASK              = 0xffff0f00

unix/zerrors_linux_s390x.go

@@ -115,6 +115,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x80000
 	IN_NONBLOCK                      = 0x800
+	IOCTL_MEI_NOTIFY_GET             = 0x80044803
+	IOCTL_MEI_NOTIFY_SET             = 0x40044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x7b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/zerrors_linux_sparc64.go

@@ -119,6 +119,8 @@ const (
 	IEXTEN                           = 0x8000
 	IN_CLOEXEC                       = 0x400000
 	IN_NONBLOCK                      = 0x4000
+	IOCTL_MEI_NOTIFY_GET             = 0x40044803
+	IOCTL_MEI_NOTIFY_SET             = 0x80044802
 	IOCTL_VM_SOCKETS_GET_LOCAL_CID   = 0x200007b9
 	IPV6_FLOWINFO_MASK               = 0xfffffff
 	IPV6_FLOWLABEL_MASK              = 0xfffff

unix/ztypes_freebsd_386.go

@@ -203,7 +203,8 @@ type Xucred struct {
 	Uid     uint32
 	Ngroups int16
 	Groups  [16]uint32
-	_       *byte
+	_       byte
+	Pid		uint32
 }
 
 type Linger struct {
@@ -268,7 +269,7 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
-	SizeofXucred           = 0x50
+	SizeofXucred           = 0x54
 	SizeofLinger           = 0x8
 	SizeofIovec            = 0x8
 	SizeofIPMreq           = 0x8

unix/ztypes_freebsd_amd64.go

@@ -200,7 +200,8 @@ type Xucred struct {
 	Uid     uint32
 	Ngroups int16
 	Groups  [16]uint32
-	_       *byte
+	_       byte
+	Pid		uint32
 }
 
 type Linger struct {
@@ -265,7 +266,7 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
-	SizeofXucred           = 0x58
+	SizeofXucred           = 0x54
 	SizeofLinger           = 0x8
 	SizeofIovec            = 0x10
 	SizeofIPMreq           = 0x8

unix/ztypes_freebsd_arm.go

@@ -202,7 +202,8 @@ type Xucred struct {
 	Uid     uint32
 	Ngroups int16
 	Groups  [16]uint32
-	_       *byte
+	_       byte
+	Pid		uint32
 }
 
 type Linger struct {
@@ -267,7 +268,7 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
-	SizeofXucred           = 0x50
+	SizeofXucred           = 0x54
 	SizeofLinger           = 0x8
 	SizeofIovec            = 0x8
 	SizeofIPMreq           = 0x8

unix/ztypes_freebsd_arm64.go

@@ -200,7 +200,8 @@ type Xucred struct {
 	Uid     uint32
 	Ngroups int16
 	Groups  [16]uint32
-	_       *byte
+	_       byte
+	Pid		uint32
 }
 
 type Linger struct {
@@ -265,7 +266,7 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
-	SizeofXucred           = 0x58
+	SizeofXucred           = 0x54
 	SizeofLinger           = 0x8
 	SizeofIovec            = 0x10
 	SizeofIPMreq           = 0x8

unix/ztypes_freebsd_riscv64.go

@@ -200,7 +200,8 @@ type Xucred struct {
 	Uid     uint32
 	Ngroups int16
 	Groups  [16]uint32
-	_       *byte
+	_       byte
+	Pid		uint32
 }
 
 type Linger struct {
@@ -265,7 +266,7 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
-	SizeofXucred           = 0x58
+	SizeofXucred           = 0x54
 	SizeofLinger           = 0x8
 	SizeofIovec            = 0x10
 	SizeofIPMreq           = 0x8

unix/ztypes_netbsd_arm.go

@@ -104,7 +104,7 @@ type Statvfs_t struct {
 	Fsid        uint32
 	Namemax     uint32
 	Owner       uint32
-	Spare       [4]uint32
+	Spare       [4]uint64
 	Fstypename  [32]byte
 	Mntonname   [1024]byte
 	Mntfromname [1024]byte

windows/syscall_windows.go

@@ -900,6 +900,7 @@ const socket_error = uintptr(^uint32(0))
 //sys   NotifyRouteChange2(family uint16, callback uintptr, callerContext unsafe.Pointer, initialNotification bool, notificationHandle *Handle) (errcode error) = iphlpapi.NotifyRouteChange2
 //sys   NotifyUnicastIpAddressChange(family uint16, callback uintptr, callerContext unsafe.Pointer, initialNotification bool, notificationHandle *Handle) (errcode error) = iphlpapi.NotifyUnicastIpAddressChange
 //sys   CancelMibChangeNotify2(notificationHandle Handle) (errcode error) = iphlpapi.CancelMibChangeNotify2
+//sys	IsProcessorFeaturePresent(ProcessorFeature uint32) (ret bool) = kernel32.IsProcessorFeaturePresent
 
 // For testing: clients can set this flag to force
 // creation of IPv6 sockets to return EAFNOSUPPORT.

windows/syscall_windows_test.go

@@ -1493,3 +1493,22 @@ func TestRoundtripNTUnicodeString(t *testing.T) {
 		}
 	}
 }
+
+func TestIsProcessorFeaturePresent(t *testing.T) {
+	// according to
+	// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-isprocessorfeaturepresent
+	// if PF_PAE_ENABLED returns nonzero value, then
+	// ...
+	// The processor is PAE-enabled. For more information, see Physical Address Extension.
+	// All x64 processors always return a nonzero value for this feature.
+	// ...
+	switch runtime.GOARCH {
+	case "amd64", "386":
+	default:
+		t.Skipf("the test is no supported by %q processor type", runtime.GOARCH)
+	}
+
+	if !windows.IsProcessorFeaturePresent(windows.PF_PAE_ENABLED) {
+		t.Fatal("IsProcessorFeaturePresent failed, but should succeed")
+	}
+}

windows/types_windows.go

@@ -3938,3 +3938,88 @@ const (
 	MOUSE_EVENT              = 0x0002
 	WINDOW_BUFFER_SIZE_EVENT = 0x0004
 )
+
+// The processor features to be tested for IsProcessorFeaturePresent, see
+// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-isprocessorfeaturepresent
+const (
+	PF_ARM_64BIT_LOADSTORE_ATOMIC              = 25
+	PF_ARM_DIVIDE_INSTRUCTION_AVAILABLE        = 24
+	PF_ARM_EXTERNAL_CACHE_AVAILABLE            = 26
+	PF_ARM_FMAC_INSTRUCTIONS_AVAILABLE         = 27
+	PF_ARM_VFP_32_REGISTERS_AVAILABLE          = 18
+	PF_3DNOW_INSTRUCTIONS_AVAILABLE            = 7
+	PF_CHANNELS_ENABLED                        = 16
+	PF_COMPARE_EXCHANGE_DOUBLE                 = 2
+	PF_COMPARE_EXCHANGE128                     = 14
+	PF_COMPARE64_EXCHANGE128                   = 15
+	PF_FASTFAIL_AVAILABLE                      = 23
+	PF_FLOATING_POINT_EMULATED                 = 1
+	PF_FLOATING_POINT_PRECISION_ERRATA         = 0
+	PF_MMX_INSTRUCTIONS_AVAILABLE              = 3
+	PF_NX_ENABLED                              = 12
+	PF_PAE_ENABLED                             = 9
+	PF_RDTSC_INSTRUCTION_AVAILABLE             = 8
+	PF_RDWRFSGSBASE_AVAILABLE                  = 22
+	PF_SECOND_LEVEL_ADDRESS_TRANSLATION        = 20
+	PF_SSE3_INSTRUCTIONS_AVAILABLE             = 13
+	PF_SSSE3_INSTRUCTIONS_AVAILABLE            = 36
+	PF_SSE4_1_INSTRUCTIONS_AVAILABLE           = 37
+	PF_SSE4_2_INSTRUCTIONS_AVAILABLE           = 38
+	PF_AVX_INSTRUCTIONS_AVAILABLE              = 39
+	PF_AVX2_INSTRUCTIONS_AVAILABLE             = 40
+	PF_AVX512F_INSTRUCTIONS_AVAILABLE          = 41
+	PF_VIRT_FIRMWARE_ENABLED                   = 21
+	PF_XMMI_INSTRUCTIONS_AVAILABLE             = 6
+	PF_XMMI64_INSTRUCTIONS_AVAILABLE           = 10
+	PF_XSAVE_ENABLED                           = 17
+	PF_ARM_V8_INSTRUCTIONS_AVAILABLE           = 29
+	PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE    = 30
+	PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE     = 31
+	PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE   = 34
+	PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE       = 43
+	PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE    = 44
+	PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE    = 45
+	PF_ARM_SVE_INSTRUCTIONS_AVAILABLE          = 46
+	PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE         = 47
+	PF_ARM_SVE2_1_INSTRUCTIONS_AVAILABLE       = 48
+	PF_ARM_SVE_AES_INSTRUCTIONS_AVAILABLE      = 49
+	PF_ARM_SVE_PMULL128_INSTRUCTIONS_AVAILABLE = 50
+	PF_ARM_SVE_BITPERM_INSTRUCTIONS_AVAILABLE  = 51
+	PF_ARM_SVE_BF16_INSTRUCTIONS_AVAILABLE     = 52
+	PF_ARM_SVE_EBF16_INSTRUCTIONS_AVAILABLE    = 53
+	PF_ARM_SVE_B16B16_INSTRUCTIONS_AVAILABLE   = 54
+	PF_ARM_SVE_SHA3_INSTRUCTIONS_AVAILABLE     = 55
+	PF_ARM_SVE_SM4_INSTRUCTIONS_AVAILABLE      = 56
+	PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE     = 57
+	PF_ARM_SVE_F32MM_INSTRUCTIONS_AVAILABLE    = 58
+	PF_ARM_SVE_F64MM_INSTRUCTIONS_AVAILABLE    = 59
+	PF_BMI2_INSTRUCTIONS_AVAILABLE             = 60
+	PF_MOVDIR64B_INSTRUCTION_AVAILABLE         = 61
+	PF_ARM_LSE2_AVAILABLE                      = 62
+	PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE         = 64
+	PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE       = 65
+	PF_ARM_V82_I8MM_INSTRUCTIONS_AVAILABLE     = 66
+	PF_ARM_V82_FP16_INSTRUCTIONS_AVAILABLE     = 67
+	PF_ARM_V86_BF16_INSTRUCTIONS_AVAILABLE     = 68
+	PF_ARM_V86_EBF16_INSTRUCTIONS_AVAILABLE    = 69
+	PF_ARM_SME_INSTRUCTIONS_AVAILABLE          = 70
+	PF_ARM_SME2_INSTRUCTIONS_AVAILABLE         = 71
+	PF_ARM_SME2_1_INSTRUCTIONS_AVAILABLE       = 72
+	PF_ARM_SME2_2_INSTRUCTIONS_AVAILABLE       = 73
+	PF_ARM_SME_AES_INSTRUCTIONS_AVAILABLE      = 74
+	PF_ARM_SME_SBITPERM_INSTRUCTIONS_AVAILABLE = 75
+	PF_ARM_SME_SF8MM4_INSTRUCTIONS_AVAILABLE   = 76
+	PF_ARM_SME_SF8MM8_INSTRUCTIONS_AVAILABLE   = 77
+	PF_ARM_SME_SF8DP2_INSTRUCTIONS_AVAILABLE   = 78
+	PF_ARM_SME_SF8DP4_INSTRUCTIONS_AVAILABLE   = 79
+	PF_ARM_SME_SF8FMA_INSTRUCTIONS_AVAILABLE   = 80
+	PF_ARM_SME_F8F32_INSTRUCTIONS_AVAILABLE    = 81
+	PF_ARM_SME_F8F16_INSTRUCTIONS_AVAILABLE    = 82
+	PF_ARM_SME_F16F16_INSTRUCTIONS_AVAILABLE   = 83
+	PF_ARM_SME_B16B16_INSTRUCTIONS_AVAILABLE   = 84
+	PF_ARM_SME_F64F64_INSTRUCTIONS_AVAILABLE   = 85
+	PF_ARM_SME_I16I64_INSTRUCTIONS_AVAILABLE   = 86
+	PF_ARM_SME_LUTv2_INSTRUCTIONS_AVAILABLE    = 87
+	PF_ARM_SME_FA64_INSTRUCTIONS_AVAILABLE     = 88
+	PF_UMONITOR_INSTRUCTION_AVAILABLE          = 89
+)

windows/zsyscall_windows.go

@@ -320,6 +320,7 @@ var (
 	procGetVolumePathNamesForVolumeNameW                     = modkernel32.NewProc("GetVolumePathNamesForVolumeNameW")
 	procGetWindowsDirectoryW                                 = modkernel32.NewProc("GetWindowsDirectoryW")
 	procInitializeProcThreadAttributeList                    = modkernel32.NewProc("InitializeProcThreadAttributeList")
+	procIsProcessorFeaturePresent                            = modkernel32.NewProc("IsProcessorFeaturePresent")
 	procIsWow64Process                                       = modkernel32.NewProc("IsWow64Process")
 	procIsWow64Process2                                      = modkernel32.NewProc("IsWow64Process2")
 	procLoadLibraryExW                                       = modkernel32.NewProc("LoadLibraryExW")
@@ -2786,6 +2787,12 @@ func initializeProcThreadAttributeList(attrlist *ProcThreadAttributeList, attrco
 	return
 }
 
+func IsProcessorFeaturePresent(ProcessorFeature uint32) (ret bool) {
+	r0, _, _ := syscall.SyscallN(procIsProcessorFeaturePresent.Addr(), uintptr(ProcessorFeature))
+	ret = r0 != 0
+	return
+}
+
 func IsWow64Process(handle Handle, isWow64 *bool) (err error) {
 	var _p0 uint32
 	if *isWow64 {