vendor: update syscalls dependency

(cherry picked from commit dcc045f03c)

vendor/golang.org/x/sys/cpu/cpu.go

@@ -29,6 +29,8 @@ var X86 struct {
 	HasOSXSAVE   bool // OS supports XSAVE/XRESTOR for saving/restoring XMM registers.
 	HasPCLMULQDQ bool // PCLMULQDQ instruction - most often used for AES-GCM
 	HasPOPCNT    bool // Hamming weight instruction POPCNT.
+	HasRDRAND    bool // RDRAND instruction (on-chip random number generator)
+	HasRDSEED    bool // RDSEED instruction (on-chip random number generator)
 	HasSSE2      bool // Streaming SIMD extension 2 (always available on amd64)
 	HasSSE3      bool // Streaming SIMD extension 3
 	HasSSSE3     bool // Supplemental streaming SIMD extension 3
@@ -36,3 +38,52 @@ var X86 struct {
 	HasSSE42     bool // Streaming SIMD extension 4 and 4.2
 	_            CacheLinePad
 }
+
+// ARM64 contains the supported CPU features of the
+// current ARMv8(aarch64) platform. If the current platform
+// is not arm64 then all feature flags are false.
+var ARM64 struct {
+	_           CacheLinePad
+	HasFP       bool // Floating-point instruction set (always available)
+	HasASIMD    bool // Advanced SIMD (always available)
+	HasEVTSTRM  bool // Event stream support
+	HasAES      bool // AES hardware implementation
+	HasPMULL    bool // Polynomial multiplication instruction set
+	HasSHA1     bool // SHA1 hardware implementation
+	HasSHA2     bool // SHA2 hardware implementation
+	HasCRC32    bool // CRC32 hardware implementation
+	HasATOMICS  bool // Atomic memory operation instruction set
+	HasFPHP     bool // Half precision floating-point instruction set
+	HasASIMDHP  bool // Advanced SIMD half precision instruction set
+	HasCPUID    bool // CPUID identification scheme registers
+	HasASIMDRDM bool // Rounding double multiply add/subtract instruction set
+	HasJSCVT    bool // Javascript conversion from floating-point to integer
+	HasFCMA     bool // Floating-point multiplication and addition of complex numbers
+	HasLRCPC    bool // Release Consistent processor consistent support
+	HasDCPOP    bool // Persistent memory support
+	HasSHA3     bool // SHA3 hardware implementation
+	HasSM3      bool // SM3 hardware implementation
+	HasSM4      bool // SM4 hardware implementation
+	HasASIMDDP  bool // Advanced SIMD double precision instruction set
+	HasSHA512   bool // SHA512 hardware implementation
+	HasSVE      bool // Scalable Vector Extensions
+	HasASIMDFHM bool // Advanced SIMD multiplication FP16 to FP32
+	_           CacheLinePad
+}
+
+// PPC64 contains the supported CPU features of the current ppc64/ppc64le platforms.
+// If the current platform is not ppc64/ppc64le then all feature flags are false.
+//
+// For ppc64/ppc64le, it is safe to check only for ISA level starting on ISA v3.00,
+// since there are no optional categories. There are some exceptions that also
+// require kernel support to work (DARN, SCV), so there are feature bits for
+// those as well. The minimum processor requirement is POWER8 (ISA 2.07).
+// The struct is padded to avoid false sharing.
+var PPC64 struct {
+	_        CacheLinePad
+	HasDARN  bool // Hardware random number generator (requires kernel enablement)
+	HasSCV   bool // Syscall vectored (requires kernel enablement)
+	IsPOWER8 bool // ISA v2.07 (POWER8)
+	IsPOWER9 bool // ISA v3.00 (POWER9)
+	_        CacheLinePad
+}

vendor/golang.org/x/sys/cpu/cpu_arm.go

@@ -5,3 +5,5 @@
 package cpu
 
 const cacheLineSize = 32
+
+func doinit() {}

vendor/golang.org/x/sys/cpu/cpu_arm64.go

@@ -5,3 +5,63 @@
 package cpu
 
 const cacheLineSize = 64
+
+// HWCAP/HWCAP2 bits. These are exposed by Linux.
+const (
+	hwcap_FP       = 1 << 0
+	hwcap_ASIMD    = 1 << 1
+	hwcap_EVTSTRM  = 1 << 2
+	hwcap_AES      = 1 << 3
+	hwcap_PMULL    = 1 << 4
+	hwcap_SHA1     = 1 << 5
+	hwcap_SHA2     = 1 << 6
+	hwcap_CRC32    = 1 << 7
+	hwcap_ATOMICS  = 1 << 8
+	hwcap_FPHP     = 1 << 9
+	hwcap_ASIMDHP  = 1 << 10
+	hwcap_CPUID    = 1 << 11
+	hwcap_ASIMDRDM = 1 << 12
+	hwcap_JSCVT    = 1 << 13
+	hwcap_FCMA     = 1 << 14
+	hwcap_LRCPC    = 1 << 15
+	hwcap_DCPOP    = 1 << 16
+	hwcap_SHA3     = 1 << 17
+	hwcap_SM3      = 1 << 18
+	hwcap_SM4      = 1 << 19
+	hwcap_ASIMDDP  = 1 << 20
+	hwcap_SHA512   = 1 << 21
+	hwcap_SVE      = 1 << 22
+	hwcap_ASIMDFHM = 1 << 23
+)
+
+func doinit() {
+	// HWCAP feature bits
+	ARM64.HasFP = isSet(HWCap, hwcap_FP)
+	ARM64.HasASIMD = isSet(HWCap, hwcap_ASIMD)
+	ARM64.HasEVTSTRM = isSet(HWCap, hwcap_EVTSTRM)
+	ARM64.HasAES = isSet(HWCap, hwcap_AES)
+	ARM64.HasPMULL = isSet(HWCap, hwcap_PMULL)
+	ARM64.HasSHA1 = isSet(HWCap, hwcap_SHA1)
+	ARM64.HasSHA2 = isSet(HWCap, hwcap_SHA2)
+	ARM64.HasCRC32 = isSet(HWCap, hwcap_CRC32)
+	ARM64.HasATOMICS = isSet(HWCap, hwcap_ATOMICS)
+	ARM64.HasFPHP = isSet(HWCap, hwcap_FPHP)
+	ARM64.HasASIMDHP = isSet(HWCap, hwcap_ASIMDHP)
+	ARM64.HasCPUID = isSet(HWCap, hwcap_CPUID)
+	ARM64.HasASIMDRDM = isSet(HWCap, hwcap_ASIMDRDM)
+	ARM64.HasJSCVT = isSet(HWCap, hwcap_JSCVT)
+	ARM64.HasFCMA = isSet(HWCap, hwcap_FCMA)
+	ARM64.HasLRCPC = isSet(HWCap, hwcap_LRCPC)
+	ARM64.HasDCPOP = isSet(HWCap, hwcap_DCPOP)
+	ARM64.HasSHA3 = isSet(HWCap, hwcap_SHA3)
+	ARM64.HasSM3 = isSet(HWCap, hwcap_SM3)
+	ARM64.HasSM4 = isSet(HWCap, hwcap_SM4)
+	ARM64.HasASIMDDP = isSet(HWCap, hwcap_ASIMDDP)
+	ARM64.HasSHA512 = isSet(HWCap, hwcap_SHA512)
+	ARM64.HasSVE = isSet(HWCap, hwcap_SVE)
+	ARM64.HasASIMDFHM = isSet(HWCap, hwcap_ASIMDFHM)
+}
+
+func isSet(hwc uint, value uint) bool {
+	return hwc&value != 0
+}

vendor/golang.org/x/sys/cpu/cpu_linux.go

@@ -0,0 +1,61 @@
+// Copyright 2018 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.
+
+//+build !amd64,!amd64p32,!386
+
+package cpu
+
+import (
+	"encoding/binary"
+	"io/ioutil"
+	"runtime"
+)
+
+const (
+	_AT_HWCAP  = 16
+	_AT_HWCAP2 = 26
+
+	procAuxv = "/proc/self/auxv"
+
+	uintSize uint = 32 << (^uint(0) >> 63)
+)
+
+// For those platforms don't have a 'cpuid' equivalent we use HWCAP/HWCAP2
+// These are initialized in cpu_$GOARCH.go
+// and should not be changed after they are initialized.
+var HWCap uint
+var HWCap2 uint
+
+func init() {
+	buf, err := ioutil.ReadFile(procAuxv)
+	if err != nil {
+		panic("read proc auxv failed: " + err.Error())
+	}
+
+	pb := int(uintSize / 8)
+
+	for i := 0; i < len(buf)-pb*2; i += pb * 2 {
+		var tag, val uint
+		switch uintSize {
+		case 32:
+			tag = uint(binary.LittleEndian.Uint32(buf[i:]))
+			val = uint(binary.LittleEndian.Uint32(buf[i+pb:]))
+		case 64:
+			if runtime.GOARCH == "ppc64" {
+				tag = uint(binary.BigEndian.Uint64(buf[i:]))
+				val = uint(binary.BigEndian.Uint64(buf[i+pb:]))
+			} else {
+				tag = uint(binary.LittleEndian.Uint64(buf[i:]))
+				val = uint(binary.LittleEndian.Uint64(buf[i+pb:]))
+			}
+		}
+		switch tag {
+		case _AT_HWCAP:
+			HWCap = val
+		case _AT_HWCAP2:
+			HWCap2 = val
+		}
+	}
+	doinit()
+}

vendor/golang.org/x/sys/cpu/cpu_mips64x.go

@@ -7,3 +7,5 @@
 package cpu
 
 const cacheLineSize = 32
+
+func doinit() {}

vendor/golang.org/x/sys/cpu/cpu_mipsx.go

@@ -7,3 +7,5 @@
 package cpu
 
 const cacheLineSize = 32
+
+func doinit() {}

vendor/golang.org/x/sys/cpu/cpu_ppc64x.go

@@ -7,3 +7,26 @@
 package cpu
 
 const cacheLineSize = 128
+
+// HWCAP/HWCAP2 bits. These are exposed by the kernel.
+const (
+	// ISA Level
+	_PPC_FEATURE2_ARCH_2_07 = 0x80000000
+	_PPC_FEATURE2_ARCH_3_00 = 0x00800000
+
+	// CPU features
+	_PPC_FEATURE2_DARN = 0x00200000
+	_PPC_FEATURE2_SCV  = 0x00100000
+)
+
+func doinit() {
+	// HWCAP2 feature bits
+	PPC64.IsPOWER8 = isSet(HWCap2, _PPC_FEATURE2_ARCH_2_07)
+	PPC64.IsPOWER9 = isSet(HWCap2, _PPC_FEATURE2_ARCH_3_00)
+	PPC64.HasDARN = isSet(HWCap2, _PPC_FEATURE2_DARN)
+	PPC64.HasSCV = isSet(HWCap2, _PPC_FEATURE2_SCV)
+}
+
+func isSet(hwc uint, value uint) bool {
+	return hwc&value != 0
+}

vendor/golang.org/x/sys/cpu/cpu_s390x.go

@@ -5,3 +5,5 @@
 package cpu
 
 const cacheLineSize = 256
+
+func doinit() {}

vendor/golang.org/x/sys/cpu/cpu_x86.go

@@ -27,6 +27,7 @@ func init() {
 	X86.HasPOPCNT = isSet(23, ecx1)
 	X86.HasAES = isSet(25, ecx1)
 	X86.HasOSXSAVE = isSet(27, ecx1)
+	X86.HasRDRAND = isSet(30, ecx1)
 
 	osSupportsAVX := false
 	// For XGETBV, OSXSAVE bit is required and sufficient.
@@ -47,6 +48,7 @@ func init() {
 	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)
 }