update golang libraries (#15258) (#15260)

go.mod

@@ -70,7 +70,7 @@ require (
 	github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81
 	github.com/mgechev/revive v1.0.3-0.20200921231451-246eac737dc7
 	github.com/mholt/archiver/v3 v3.3.0
-	github.com/microcosm-cc/bluemonday v1.0.3-0.20191119130333-0a75d7616912
+	github.com/microcosm-cc/bluemonday v1.0.5
 	github.com/minio/minio-go/v7 v7.0.4
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
@@ -105,9 +105,9 @@ require (
 	go.jolheiser.com/hcaptcha v0.0.4
 	go.jolheiser.com/pwn v0.0.3
 	golang.org/x/crypto v0.0.0-20201217014255-9d1352758620
-	golang.org/x/net v0.0.0-20200904194848-62affa334b73
+	golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	golang.org/x/sys v0.0.0-20200918174421-af09f7315aff
+	golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44
 	golang.org/x/text v0.3.3
 	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect
 	golang.org/x/tools v0.0.0-20200921210052-fa0125251cc4

go.sum

@@ -885,7 +885,6 @@ github.com/yuin/goldmark v1.1.7/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9dec
 github.com/yuin/goldmark v1.1.22/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.2.1 h1:ruQGxdhGHe7FWOJPT0mKs5+pD2Xs1Bm/kdGlHO04FmM=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.3 h1:37BdQwPx8VOSic8eDSWee6QL9mRpZRm9VJp/QugNrW0=
 github.com/yuin/goldmark v1.3.3/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
@@ -997,8 +996,8 @@ golang.org/x/net v0.0.0-20200602114024-627f9648deb9/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73 h1:MXfv8rhZWmFeqX3GNZRsd6vOLoaCHjYEX3qkRo3YBUA=
+golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c h1:KHUzaHIpjWVlVVNh65G3hhuj3KB1HnjY6Cq5cTvRQT8=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/oauth2 v0.0.0-20180620175406-ef147856a6dd/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181106182150-f42d05182288/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -1054,10 +1053,12 @@ golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200413165638-669c56c373c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200918174421-af09f7315aff h1:1CPUrky56AcgSpxz/KfgzQWzfG09u5YOL8MvPYBlrL8=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200918174421-af09f7315aff/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44 h1:Bli41pIlzTzf3KEY06n+xnzK/BESIg2ze4Pgfh/aI8c=
-golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=

vendor/golang.org/x/net/context/go17.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.7
 // +build go1.7
 
 package context

vendor/golang.org/x/net/context/go19.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.9
 // +build go1.9
 
 package context

vendor/golang.org/x/net/context/pre_go17.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.7
 // +build !go1.7
 
 package context

vendor/golang.org/x/net/context/pre_go19.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.9
 // +build !go1.9
 
 package context

vendor/golang.org/x/net/html/const.go

@@ -52,7 +52,7 @@ var isSpecialElementMap = map[string]bool{
 	"iframe":     true,
 	"img":        true,
 	"input":      true,
-	"keygen":     true,
+	"keygen":     true, // "keygen" has been removed from the spec, but are kept here for backwards compatibility.
 	"li":         true,
 	"link":       true,
 	"listing":    true,

vendor/golang.org/x/net/html/foreign.go

@@ -161,65 +161,62 @@ var mathMLAttributeAdjustments = map[string]string{
 }
 
 var svgAttributeAdjustments = map[string]string{
-	"attributename":             "attributeName",
+	"attributename":       "attributeName",
-	"attributetype":             "attributeType",
+	"attributetype":       "attributeType",
-	"basefrequency":             "baseFrequency",
+	"basefrequency":       "baseFrequency",
-	"baseprofile":               "baseProfile",
+	"baseprofile":         "baseProfile",
-	"calcmode":                  "calcMode",
+	"calcmode":            "calcMode",
-	"clippathunits":             "clipPathUnits",
+	"clippathunits":       "clipPathUnits",
-	"contentscripttype":         "contentScriptType",
+	"diffuseconstant":     "diffuseConstant",
-	"contentstyletype":          "contentStyleType",
+	"edgemode":            "edgeMode",
-	"diffuseconstant":           "diffuseConstant",
+	"filterunits":         "filterUnits",
-	"edgemode":                  "edgeMode",
+	"glyphref":            "glyphRef",
-	"externalresourcesrequired": "externalResourcesRequired",
+	"gradienttransform":   "gradientTransform",
-	"filterunits":               "filterUnits",
+	"gradientunits":       "gradientUnits",
-	"glyphref":                  "glyphRef",
+	"kernelmatrix":        "kernelMatrix",
-	"gradienttransform":         "gradientTransform",
+	"kernelunitlength":    "kernelUnitLength",
-	"gradientunits":             "gradientUnits",
+	"keypoints":           "keyPoints",
-	"kernelmatrix":              "kernelMatrix",
+	"keysplines":          "keySplines",
-	"kernelunitlength":          "kernelUnitLength",
+	"keytimes":            "keyTimes",
-	"keypoints":                 "keyPoints",
+	"lengthadjust":        "lengthAdjust",
-	"keysplines":                "keySplines",
+	"limitingconeangle":   "limitingConeAngle",
-	"keytimes":                  "keyTimes",
+	"markerheight":        "markerHeight",
-	"lengthadjust":              "lengthAdjust",
+	"markerunits":         "markerUnits",
-	"limitingconeangle":         "limitingConeAngle",
+	"markerwidth":         "markerWidth",
-	"markerheight":              "markerHeight",
+	"maskcontentunits":    "maskContentUnits",
-	"markerunits":               "markerUnits",
+	"maskunits":           "maskUnits",
-	"markerwidth":               "markerWidth",
+	"numoctaves":          "numOctaves",
-	"maskcontentunits":          "maskContentUnits",
+	"pathlength":          "pathLength",
-	"maskunits":                 "maskUnits",
+	"patterncontentunits": "patternContentUnits",
-	"numoctaves":                "numOctaves",
+	"patterntransform":    "patternTransform",
-	"pathlength":                "pathLength",
+	"patternunits":        "patternUnits",
-	"patterncontentunits":       "patternContentUnits",
+	"pointsatx":           "pointsAtX",
-	"patterntransform":          "patternTransform",
+	"pointsaty":           "pointsAtY",
-	"patternunits":              "patternUnits",
+	"pointsatz":           "pointsAtZ",
-	"pointsatx":                 "pointsAtX",
+	"preservealpha":       "preserveAlpha",
-	"pointsaty":                 "pointsAtY",
+	"preserveaspectratio": "preserveAspectRatio",
-	"pointsatz":                 "pointsAtZ",
+	"primitiveunits":      "primitiveUnits",
-	"preservealpha":             "preserveAlpha",
+	"refx":                "refX",
-	"preserveaspectratio":       "preserveAspectRatio",
+	"refy":                "refY",
-	"primitiveunits":            "primitiveUnits",
+	"repeatcount":         "repeatCount",
-	"refx":                      "refX",
+	"repeatdur":           "repeatDur",
-	"refy":                      "refY",
+	"requiredextensions":  "requiredExtensions",
-	"repeatcount":               "repeatCount",
+	"requiredfeatures":    "requiredFeatures",
-	"repeatdur":                 "repeatDur",
+	"specularconstant":    "specularConstant",
-	"requiredextensions":        "requiredExtensions",
+	"specularexponent":    "specularExponent",
-	"requiredfeatures":          "requiredFeatures",
+	"spreadmethod":        "spreadMethod",
-	"specularconstant":          "specularConstant",
+	"startoffset":         "startOffset",
-	"specularexponent":          "specularExponent",
+	"stddeviation":        "stdDeviation",
-	"spreadmethod":              "spreadMethod",
+	"stitchtiles":         "stitchTiles",
-	"startoffset":               "startOffset",
+	"surfacescale":        "surfaceScale",
-	"stddeviation":              "stdDeviation",
+	"systemlanguage":      "systemLanguage",
-	"stitchtiles":               "stitchTiles",
+	"tablevalues":         "tableValues",
-	"surfacescale":              "surfaceScale",
+	"targetx":             "targetX",
-	"systemlanguage":            "systemLanguage",
+	"targety":             "targetY",
-	"tablevalues":               "tableValues",
+	"textlength":          "textLength",
-	"targetx":                   "targetX",
+	"viewbox":             "viewBox",
-	"targety":                   "targetY",
+	"viewtarget":          "viewTarget",
-	"textlength":                "textLength",
+	"xchannelselector":    "xChannelSelector",
-	"viewbox":                   "viewBox",
+	"ychannelselector":    "yChannelSelector",
-	"viewtarget":                "viewTarget",
+	"zoomandpan":          "zoomAndPan",
-	"xchannelselector":          "xChannelSelector",
-	"ychannelselector":          "yChannelSelector",
-	"zoomandpan":                "zoomAndPan",
 }

vendor/golang.org/x/net/html/parse.go

@@ -728,7 +728,13 @@ func inHeadNoscriptIM(p *parser) bool {
 			return inBodyIM(p)
 		case a.Basefont, a.Bgsound, a.Link, a.Meta, a.Noframes, a.Style:
 			return inHeadIM(p)
-		case a.Head, a.Noscript:
+		case a.Head:
+			// Ignore the token.
+			return true
+		case a.Noscript:
+			// Don't let the tokenizer go into raw text mode even when a <noscript>
+			// tag is in "in head noscript" insertion mode.
+			p.tokenizer.NextIsNotRawText()
 			// Ignore the token.
 			return true
 		}
@@ -1790,6 +1796,13 @@ func inSelectIM(p *parser) bool {
 			return true
 		case a.Script, a.Template:
 			return inHeadIM(p)
+		case a.Iframe, a.Noembed, a.Noframes, a.Noscript, a.Plaintext, a.Style, a.Title, a.Xmp:
+			// Don't let the tokenizer go into raw text mode when there are raw tags
+			// to be ignored. These tags should be ignored from the tokenizer
+			// properly.
+			p.tokenizer.NextIsNotRawText()
+			// Ignore the token.
+			return true
 		}
 	case EndTagToken:
 		switch p.tok.DataAtom {

vendor/golang.org/x/net/html/render.go

@@ -263,7 +263,7 @@ var voidElements = map[string]bool{
 	"hr":     true,
 	"img":    true,
 	"input":  true,
-	"keygen": true,
+	"keygen": true, // "keygen" has been removed from the spec, but are kept here for backwards compatibility.
 	"link":   true,
 	"meta":   true,
 	"param":  true,

vendor/golang.org/x/net/idna/idna10.0.0.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.10
 // +build go1.10
 
 // Package idna implements IDNA2008 using the compatibility processing

vendor/golang.org/x/net/idna/idna9.0.0.go

@@ -4,6 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.10
 // +build !go1.10
 
 // Package idna implements IDNA2008 using the compatibility processing

vendor/golang.org/x/net/idna/tables10.0.0.go

@@ -1,5 +1,6 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
+//go:build go1.10 && !go1.13
 // +build go1.10,!go1.13
 
 package idna

vendor/golang.org/x/net/idna/tables11.0.0.go

@@ -1,5 +1,6 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
+//go:build go1.13 && !go1.14
 // +build go1.13,!go1.14
 
 package idna

vendor/golang.org/x/net/idna/tables12.0.0.go

@@ -1,6 +1,7 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
-// +build go1.14
+//go:build go1.14 && !go1.16
+// +build go1.14,!go1.16
 
 package idna
 

vendor/golang.org/x/net/idna/tables9.0.0.go

@@ -1,5 +1,6 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
+//go:build !go1.10
 // +build !go1.10
 
 package idna

vendor/golang.org/x/sys/cpu/asm_aix_ppc64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

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

@@ -29,26 +29,46 @@ type CacheLinePad struct{ _ [cacheLineSize]byte }
 // and HasAVX2 are only set if the OS supports XMM and YMM
 // registers in addition to the CPUID feature bit being set.
 var X86 struct {
-	_            CacheLinePad
+	_                   CacheLinePad
-	HasAES       bool // AES hardware implementation (AES NI)
+	HasAES              bool // AES hardware implementation (AES NI)
-	HasADX       bool // Multi-precision add-carry instruction extensions
+	HasADX              bool // Multi-precision add-carry instruction extensions
-	HasAVX       bool // Advanced vector extension
+	HasAVX              bool // Advanced vector extension
-	HasAVX2      bool // Advanced vector extension 2
+	HasAVX2             bool // Advanced vector extension 2
-	HasBMI1      bool // Bit manipulation instruction set 1
+	HasAVX512           bool // Advanced vector extension 512
-	HasBMI2      bool // Bit manipulation instruction set 2
+	HasAVX512F          bool // Advanced vector extension 512 Foundation Instructions
-	HasERMS      bool // Enhanced REP for MOVSB and STOSB
+	HasAVX512CD         bool // Advanced vector extension 512 Conflict Detection Instructions
-	HasFMA       bool // Fused-multiply-add instructions
+	HasAVX512ER         bool // Advanced vector extension 512 Exponential and Reciprocal Instructions
-	HasOSXSAVE   bool // OS supports XSAVE/XRESTOR for saving/restoring XMM registers.
+	HasAVX512PF         bool // Advanced vector extension 512 Prefetch Instructions Instructions
-	HasPCLMULQDQ bool // PCLMULQDQ instruction - most often used for AES-GCM
+	HasAVX512VL         bool // Advanced vector extension 512 Vector Length Extensions
-	HasPOPCNT    bool // Hamming weight instruction POPCNT.
+	HasAVX512BW         bool // Advanced vector extension 512 Byte and Word Instructions
-	HasRDRAND    bool // RDRAND instruction (on-chip random number generator)
+	HasAVX512DQ         bool // Advanced vector extension 512 Doubleword and Quadword Instructions
-	HasRDSEED    bool // RDSEED instruction (on-chip random number generator)
+	HasAVX512IFMA       bool // Advanced vector extension 512 Integer Fused Multiply Add
-	HasSSE2      bool // Streaming SIMD extension 2 (always available on amd64)
+	HasAVX512VBMI       bool // Advanced vector extension 512 Vector Byte Manipulation Instructions
-	HasSSE3      bool // Streaming SIMD extension 3
+	HasAVX5124VNNIW     bool // Advanced vector extension 512 Vector Neural Network Instructions Word variable precision
-	HasSSSE3     bool // Supplemental streaming SIMD extension 3
+	HasAVX5124FMAPS     bool // Advanced vector extension 512 Fused Multiply Accumulation Packed Single precision
-	HasSSE41     bool // Streaming SIMD extension 4 and 4.1
+	HasAVX512VPOPCNTDQ  bool // Advanced vector extension 512 Double and quad word population count instructions
-	HasSSE42     bool // Streaming SIMD extension 4 and 4.2
+	HasAVX512VPCLMULQDQ bool // Advanced vector extension 512 Vector carry-less multiply operations
-	_            CacheLinePad
+	HasAVX512VNNI       bool // Advanced vector extension 512 Vector Neural Network Instructions
+	HasAVX512GFNI       bool // Advanced vector extension 512 Galois field New Instructions
+	HasAVX512VAES       bool // Advanced vector extension 512 Vector AES instructions
+	HasAVX512VBMI2      bool // Advanced vector extension 512 Vector Byte Manipulation Instructions 2
+	HasAVX512BITALG     bool // Advanced vector extension 512 Bit Algorithms
+	HasAVX512BF16       bool // Advanced vector extension 512 BFloat16 Instructions
+	HasBMI1             bool // Bit manipulation instruction set 1
+	HasBMI2             bool // Bit manipulation instruction set 2
+	HasERMS             bool // Enhanced REP for MOVSB and STOSB
+	HasFMA              bool // Fused-multiply-add instructions
+	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
+	HasSSE41            bool // Streaming SIMD extension 4 and 4.1
+	HasSSE42            bool // Streaming SIMD extension 4 and 4.2
+	_                   CacheLinePad
 }
 
 // ARM64 contains the supported CPU features of the

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix
 // +build aix
 
 package cpu

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

@@ -39,31 +39,34 @@ func initOptions() {
 
 func archInit() {
 	switch runtime.GOOS {
-	case "android", "darwin", "netbsd":
+	case "freebsd":
-		// Android and iOS don't seem to allow reading these registers.
+		readARM64Registers()
-		//
+	case "linux", "netbsd":
-		// NetBSD:
-		// ID_AA64ISAR0_EL1 is a privileged register and cannot be read from EL0.
-		// It can be read via sysctl(3). Example for future implementers:
-		// https://nxr.netbsd.org/xref/src/usr.sbin/cpuctl/arch/aarch64.c
-		//
-		// Fake the minimal features expected by
-		// TestARM64minimalFeatures.
-		ARM64.HasASIMD = true
-		ARM64.HasFP = true
-	case "linux":
 		doinit()
 	default:
-		readARM64Registers()
+		// Most platforms don't seem to allow reading these registers.
+		//
+		// OpenBSD:
+		// See https://golang.org/issue/31746
+		setMinimalFeatures()
 	}
 }
 
+// setMinimalFeatures fakes the minimal ARM64 features expected by
+// TestARM64minimalFeatures.
+func setMinimalFeatures() {
+	ARM64.HasASIMD = true
+	ARM64.HasFP = true
+}
+
 func readARM64Registers() {
 	Initialized = true
 
-	// ID_AA64ISAR0_EL1
+	parseARM64SystemRegisters(getisar0(), getisar1(), getpfr0())
-	isar0 := getisar0()
+}
 
+func parseARM64SystemRegisters(isar0, isar1, pfr0 uint64) {
+	// ID_AA64ISAR0_EL1
 	switch extractBits(isar0, 4, 7) {
 	case 1:
 		ARM64.HasAES = true
@@ -121,8 +124,6 @@ func readARM64Registers() {
 	}
 
 	// ID_AA64ISAR1_EL1
-	isar1 := getisar1()
-
 	switch extractBits(isar1, 0, 3) {
 	case 1:
 		ARM64.HasDCPOP = true
@@ -144,8 +145,6 @@ func readARM64Registers() {
 	}
 
 	// ID_AA64PFR0_EL1
-	pfr0 := getpfr0()
-
 	switch extractBits(pfr0, 16, 19) {
 	case 0:
 		ARM64.HasFP = true

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

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/cpu/cpu_gc_arm64.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+//go:build gc
+// +build gc
 
 package cpu
 

vendor/golang.org/x/sys/cpu/cpu_gc_s390x.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+//go:build gc
+// +build gc
 
 package cpu
 

vendor/golang.org/x/sys/cpu/cpu_gc_x86.go

@@ -2,8 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (386 || amd64 || amd64p32) && gc
 // +build 386 amd64 amd64p32
-// +build !gccgo
+// +build gc
 
 package cpu
 

vendor/golang.org/x/sys/cpu/cpu_gccgo_arm64.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build gccgo
 // +build gccgo
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_gccgo_s390x.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build gccgo
 // +build gccgo
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_gccgo_x86.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (386 || amd64 || amd64p32) && gccgo
 // +build 386 amd64 amd64p32
 // +build gccgo
 

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !386 && !amd64 && !amd64p32 && !arm64
 // +build !386,!amd64,!amd64p32,!arm64
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_linux_mips64x.go

@@ -2,6 +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 && (mips64 || mips64le)
 // +build linux
 // +build mips64 mips64le
 

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

@@ -2,6 +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 && !arm && !arm64 && !mips64 && !mips64le && !ppc64 && !ppc64le && !s390x
 // +build linux,!arm,!arm64,!mips64,!mips64le,!ppc64,!ppc64le,!s390x
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_linux_ppc64x.go

@@ -2,6 +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 && (ppc64 || ppc64le)
 // +build linux
 // +build ppc64 ppc64le
 

vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go

@@ -17,86 +17,7 @@ const (
 	hwcap_VXE    = 8192
 )
 
-// bitIsSet reports whether the bit at index is set. The bit index
+func initS390Xbase() {
-// is in big endian order, so bit index 0 is the leftmost bit.
-func bitIsSet(bits []uint64, index uint) bool {
-	return bits[index/64]&((1<<63)>>(index%64)) != 0
-}
-
-// function is the code for the named cryptographic function.
-type function uint8
-
-const (
-	// KM{,A,C,CTR} function codes
-	aes128 function = 18 // AES-128
-	aes192 function = 19 // AES-192
-	aes256 function = 20 // AES-256
-
-	// K{I,L}MD function codes
-	sha1     function = 1  // SHA-1
-	sha256   function = 2  // SHA-256
-	sha512   function = 3  // SHA-512
-	sha3_224 function = 32 // SHA3-224
-	sha3_256 function = 33 // SHA3-256
-	sha3_384 function = 34 // SHA3-384
-	sha3_512 function = 35 // SHA3-512
-	shake128 function = 36 // SHAKE-128
-	shake256 function = 37 // SHAKE-256
-
-	// KLMD function codes
-	ghash function = 65 // GHASH
-)
-
-// queryResult contains the result of a Query function
-// call. Bits are numbered in big endian order so the
-// leftmost bit (the MSB) is at index 0.
-type queryResult struct {
-	bits [2]uint64
-}
-
-// Has reports whether the given functions are present.
-func (q *queryResult) Has(fns ...function) bool {
-	if len(fns) == 0 {
-		panic("no function codes provided")
-	}
-	for _, f := range fns {
-		if !bitIsSet(q.bits[:], uint(f)) {
-			return false
-		}
-	}
-	return true
-}
-
-// facility is a bit index for the named facility.
-type facility uint8
-
-const (
-	// cryptography facilities
-	msa4 facility = 77  // message-security-assist extension 4
-	msa8 facility = 146 // message-security-assist extension 8
-)
-
-// facilityList contains the result of an STFLE call.
-// Bits are numbered in big endian order so the
-// leftmost bit (the MSB) is at index 0.
-type facilityList struct {
-	bits [4]uint64
-}
-
-// Has reports whether the given facilities are present.
-func (s *facilityList) Has(fs ...facility) bool {
-	if len(fs) == 0 {
-		panic("no facility bits provided")
-	}
-	for _, f := range fs {
-		if !bitIsSet(s.bits[:], uint(f)) {
-			return false
-		}
-	}
-	return true
-}
-
-func doinit() {
 	// test HWCAP bit vector
 	has := func(featureMask uint) bool {
 		return hwCap&featureMask == featureMask
@@ -116,44 +37,4 @@ func doinit() {
 	if S390X.HasVX {
 		S390X.HasVXE = has(hwcap_VXE)
 	}
-
-	// We need implementations of stfle, km and so on
-	// to detect cryptographic features.
-	if !haveAsmFunctions() {
-		return
-	}
-
-	// optional cryptographic functions
-	if S390X.HasMSA {
-		aes := []function{aes128, aes192, aes256}
-
-		// cipher message
-		km, kmc := kmQuery(), kmcQuery()
-		S390X.HasAES = km.Has(aes...)
-		S390X.HasAESCBC = kmc.Has(aes...)
-		if S390X.HasSTFLE {
-			facilities := stfle()
-			if facilities.Has(msa4) {
-				kmctr := kmctrQuery()
-				S390X.HasAESCTR = kmctr.Has(aes...)
-			}
-			if facilities.Has(msa8) {
-				kma := kmaQuery()
-				S390X.HasAESGCM = kma.Has(aes...)
-			}
-		}
-
-		// compute message digest
-		kimd := kimdQuery() // intermediate (no padding)
-		klmd := klmdQuery() // last (padding)
-		S390X.HasSHA1 = kimd.Has(sha1) && klmd.Has(sha1)
-		S390X.HasSHA256 = kimd.Has(sha256) && klmd.Has(sha256)
-		S390X.HasSHA512 = kimd.Has(sha512) && klmd.Has(sha512)
-		S390X.HasGHASH = kimd.Has(ghash) // KLMD-GHASH does not exist
-		sha3 := []function{
-			sha3_224, sha3_256, sha3_384, sha3_512,
-			shake128, shake256,
-		}
-		S390X.HasSHA3 = kimd.Has(sha3...) && klmd.Has(sha3...)
-	}
 }

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 package cpu

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_netbsd_arm64.go

@@ -0,0 +1,173 @@
+// Copyright 2020 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 (
+	"syscall"
+	"unsafe"
+)
+
+// Minimal copy of functionality from x/sys/unix so the cpu package can call
+// sysctl without depending on x/sys/unix.
+
+const (
+	_CTL_QUERY = -2
+
+	_SYSCTL_VERS_1 = 0x1000000
+)
+
+var _zero uintptr
+
+func sysctl(mib []int32, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
+	var _p0 unsafe.Pointer
+	if len(mib) > 0 {
+		_p0 = unsafe.Pointer(&mib[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	_, _, errno := syscall.Syscall6(
+		syscall.SYS___SYSCTL,
+		uintptr(_p0),
+		uintptr(len(mib)),
+		uintptr(unsafe.Pointer(old)),
+		uintptr(unsafe.Pointer(oldlen)),
+		uintptr(unsafe.Pointer(new)),
+		uintptr(newlen))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+type sysctlNode struct {
+	Flags          uint32
+	Num            int32
+	Name           [32]int8
+	Ver            uint32
+	__rsvd         uint32
+	Un             [16]byte
+	_sysctl_size   [8]byte
+	_sysctl_func   [8]byte
+	_sysctl_parent [8]byte
+	_sysctl_desc   [8]byte
+}
+
+func sysctlNodes(mib []int32) ([]sysctlNode, error) {
+	var olen uintptr
+
+	// Get a list of all sysctl nodes below the given MIB by performing
+	// a sysctl for the given MIB with CTL_QUERY appended.
+	mib = append(mib, _CTL_QUERY)
+	qnode := sysctlNode{Flags: _SYSCTL_VERS_1}
+	qp := (*byte)(unsafe.Pointer(&qnode))
+	sz := unsafe.Sizeof(qnode)
+	if err := sysctl(mib, nil, &olen, qp, sz); err != nil {
+		return nil, err
+	}
+
+	// Now that we know the size, get the actual nodes.
+	nodes := make([]sysctlNode, olen/sz)
+	np := (*byte)(unsafe.Pointer(&nodes[0]))
+	if err := sysctl(mib, np, &olen, qp, sz); err != nil {
+		return nil, err
+	}
+
+	return nodes, nil
+}
+
+func nametomib(name string) ([]int32, error) {
+	// Split name into components.
+	var parts []string
+	last := 0
+	for i := 0; i < len(name); i++ {
+		if name[i] == '.' {
+			parts = append(parts, name[last:i])
+			last = i + 1
+		}
+	}
+	parts = append(parts, name[last:])
+
+	mib := []int32{}
+	// Discover the nodes and construct the MIB OID.
+	for partno, part := range parts {
+		nodes, err := sysctlNodes(mib)
+		if err != nil {
+			return nil, err
+		}
+		for _, node := range nodes {
+			n := make([]byte, 0)
+			for i := range node.Name {
+				if node.Name[i] != 0 {
+					n = append(n, byte(node.Name[i]))
+				}
+			}
+			if string(n) == part {
+				mib = append(mib, int32(node.Num))
+				break
+			}
+		}
+		if len(mib) != partno+1 {
+			return nil, err
+		}
+	}
+
+	return mib, nil
+}
+
+// aarch64SysctlCPUID is struct aarch64_sysctl_cpu_id from NetBSD's <aarch64/armreg.h>
+type aarch64SysctlCPUID struct {
+	midr      uint64 /* Main ID Register */
+	revidr    uint64 /* Revision ID Register */
+	mpidr     uint64 /* Multiprocessor Affinity Register */
+	aa64dfr0  uint64 /* A64 Debug Feature Register 0 */
+	aa64dfr1  uint64 /* A64 Debug Feature Register 1 */
+	aa64isar0 uint64 /* A64 Instruction Set Attribute Register 0 */
+	aa64isar1 uint64 /* A64 Instruction Set Attribute Register 1 */
+	aa64mmfr0 uint64 /* A64 Memory Model Feature Register 0 */
+	aa64mmfr1 uint64 /* A64 Memory Model Feature Register 1 */
+	aa64mmfr2 uint64 /* A64 Memory Model Feature Register 2 */
+	aa64pfr0  uint64 /* A64 Processor Feature Register 0 */
+	aa64pfr1  uint64 /* A64 Processor Feature Register 1 */
+	aa64zfr0  uint64 /* A64 SVE Feature ID Register 0 */
+	mvfr0     uint32 /* Media and VFP Feature Register 0 */
+	mvfr1     uint32 /* Media and VFP Feature Register 1 */
+	mvfr2     uint32 /* Media and VFP Feature Register 2 */
+	pad       uint32
+	clidr     uint64 /* Cache Level ID Register */
+	ctr       uint64 /* Cache Type Register */
+}
+
+func sysctlCPUID(name string) (*aarch64SysctlCPUID, error) {
+	mib, err := nametomib(name)
+	if err != nil {
+		return nil, err
+	}
+
+	out := aarch64SysctlCPUID{}
+	n := unsafe.Sizeof(out)
+	_, _, errno := syscall.Syscall6(
+		syscall.SYS___SYSCTL,
+		uintptr(unsafe.Pointer(&mib[0])),
+		uintptr(len(mib)),
+		uintptr(unsafe.Pointer(&out)),
+		uintptr(unsafe.Pointer(&n)),
+		uintptr(0),
+		uintptr(0))
+	if errno != 0 {
+		return nil, errno
+	}
+	return &out, nil
+}
+
+func doinit() {
+	cpuid, err := sysctlCPUID("machdep.cpu0.cpu_id")
+	if err != nil {
+		setMinimalFeatures()
+		return
+	}
+	parseARM64SystemRegisters(cpuid.aa64isar0, cpuid.aa64isar1, cpuid.aa64pfr0)
+
+	Initialized = true
+}

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

@@ -2,6 +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 && arm
 // +build !linux,arm
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_other_arm64.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !linux,arm64
+//go:build !linux && !netbsd && arm64
+// +build !linux,!netbsd,arm64
 
 package cpu
 

vendor/golang.org/x/sys/cpu/cpu_other_mips64x.go

@@ -0,0 +1,13 @@
+// Copyright 2020 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.
+
+//go:build !linux && (mips64 || mips64le)
+// +build !linux
+// +build mips64 mips64le
+
+package cpu
+
+func archInit() {
+	Initialized = true
+}

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 package cpu

vendor/golang.org/x/sys/cpu/cpu_riscv64.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build riscv64
 // +build riscv64
 
 package cpu

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

@@ -8,10 +8,10 @@ const cacheLineSize = 256
 
 func initOptions() {
 	options = []option{
-		{Name: "zarch", Feature: &S390X.HasZARCH},
+		{Name: "zarch", Feature: &S390X.HasZARCH, Required: true},
-		{Name: "stfle", Feature: &S390X.HasSTFLE},
+		{Name: "stfle", Feature: &S390X.HasSTFLE, Required: true},
-		{Name: "ldisp", Feature: &S390X.HasLDISP},
+		{Name: "ldisp", Feature: &S390X.HasLDISP, Required: true},
-		{Name: "eimm", Feature: &S390X.HasEIMM},
+		{Name: "eimm", Feature: &S390X.HasEIMM, Required: true},
 		{Name: "dfp", Feature: &S390X.HasDFP},
 		{Name: "etf3eh", Feature: &S390X.HasETF3EH},
 		{Name: "msa", Feature: &S390X.HasMSA},
@@ -28,3 +28,145 @@ func initOptions() {
 		{Name: "vxe", Feature: &S390X.HasVXE},
 	}
 }
+
+// bitIsSet reports whether the bit at index is set. The bit index
+// is in big endian order, so bit index 0 is the leftmost bit.
+func bitIsSet(bits []uint64, index uint) bool {
+	return bits[index/64]&((1<<63)>>(index%64)) != 0
+}
+
+// facility is a bit index for the named facility.
+type facility uint8
+
+const (
+	// mandatory facilities
+	zarch  facility = 1  // z architecture mode is active
+	stflef facility = 7  // store-facility-list-extended
+	ldisp  facility = 18 // long-displacement
+	eimm   facility = 21 // extended-immediate
+
+	// miscellaneous facilities
+	dfp    facility = 42 // decimal-floating-point
+	etf3eh facility = 30 // extended-translation 3 enhancement
+
+	// cryptography facilities
+	msa  facility = 17  // message-security-assist
+	msa3 facility = 76  // message-security-assist extension 3
+	msa4 facility = 77  // message-security-assist extension 4
+	msa5 facility = 57  // message-security-assist extension 5
+	msa8 facility = 146 // message-security-assist extension 8
+	msa9 facility = 155 // message-security-assist extension 9
+
+	// vector facilities
+	vx   facility = 129 // vector facility
+	vxe  facility = 135 // vector-enhancements 1
+	vxe2 facility = 148 // vector-enhancements 2
+)
+
+// facilityList contains the result of an STFLE call.
+// Bits are numbered in big endian order so the
+// leftmost bit (the MSB) is at index 0.
+type facilityList struct {
+	bits [4]uint64
+}
+
+// Has reports whether the given facilities are present.
+func (s *facilityList) Has(fs ...facility) bool {
+	if len(fs) == 0 {
+		panic("no facility bits provided")
+	}
+	for _, f := range fs {
+		if !bitIsSet(s.bits[:], uint(f)) {
+			return false
+		}
+	}
+	return true
+}
+
+// function is the code for the named cryptographic function.
+type function uint8
+
+const (
+	// KM{,A,C,CTR} function codes
+	aes128 function = 18 // AES-128
+	aes192 function = 19 // AES-192
+	aes256 function = 20 // AES-256
+
+	// K{I,L}MD function codes
+	sha1     function = 1  // SHA-1
+	sha256   function = 2  // SHA-256
+	sha512   function = 3  // SHA-512
+	sha3_224 function = 32 // SHA3-224
+	sha3_256 function = 33 // SHA3-256
+	sha3_384 function = 34 // SHA3-384
+	sha3_512 function = 35 // SHA3-512
+	shake128 function = 36 // SHAKE-128
+	shake256 function = 37 // SHAKE-256
+
+	// KLMD function codes
+	ghash function = 65 // GHASH
+)
+
+// queryResult contains the result of a Query function
+// call. Bits are numbered in big endian order so the
+// leftmost bit (the MSB) is at index 0.
+type queryResult struct {
+	bits [2]uint64
+}
+
+// Has reports whether the given functions are present.
+func (q *queryResult) Has(fns ...function) bool {
+	if len(fns) == 0 {
+		panic("no function codes provided")
+	}
+	for _, f := range fns {
+		if !bitIsSet(q.bits[:], uint(f)) {
+			return false
+		}
+	}
+	return true
+}
+
+func doinit() {
+	initS390Xbase()
+
+	// We need implementations of stfle, km and so on
+	// to detect cryptographic features.
+	if !haveAsmFunctions() {
+		return
+	}
+
+	// optional cryptographic functions
+	if S390X.HasMSA {
+		aes := []function{aes128, aes192, aes256}
+
+		// cipher message
+		km, kmc := kmQuery(), kmcQuery()
+		S390X.HasAES = km.Has(aes...)
+		S390X.HasAESCBC = kmc.Has(aes...)
+		if S390X.HasSTFLE {
+			facilities := stfle()
+			if facilities.Has(msa4) {
+				kmctr := kmctrQuery()
+				S390X.HasAESCTR = kmctr.Has(aes...)
+			}
+			if facilities.Has(msa8) {
+				kma := kmaQuery()
+				S390X.HasAESGCM = kma.Has(aes...)
+			}
+		}
+
+		// compute message digest
+		kimd := kimdQuery() // intermediate (no padding)
+		klmd := klmdQuery() // last (padding)
+		S390X.HasSHA1 = kimd.Has(sha1) && klmd.Has(sha1)
+		S390X.HasSHA256 = kimd.Has(sha256) && klmd.Has(sha256)
+		S390X.HasSHA512 = kimd.Has(sha512) && klmd.Has(sha512)
+		S390X.HasGHASH = kimd.Has(ghash) // KLMD-GHASH does not exist
+		sha3 := []function{
+			sha3_224, sha3_256, sha3_384, sha3_512,
+			shake128, shake256,
+		}
+		S390X.HasSHA3 = kimd.Has(sha3...) && klmd.Has(sha3...)
+	}
+}

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

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build wasm
 // +build wasm
 
 package cpu

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

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build 386 || amd64 || amd64p32
 // +build 386 amd64 amd64p32
 
 package cpu
@@ -16,6 +17,26 @@ func initOptions() {
 		{Name: "aes", Feature: &X86.HasAES},
 		{Name: "avx", Feature: &X86.HasAVX},
 		{Name: "avx2", Feature: &X86.HasAVX2},
+		{Name: "avx512", Feature: &X86.HasAVX512},
+		{Name: "avx512f", Feature: &X86.HasAVX512F},
+		{Name: "avx512cd", Feature: &X86.HasAVX512CD},
+		{Name: "avx512er", Feature: &X86.HasAVX512ER},
+		{Name: "avx512pf", Feature: &X86.HasAVX512PF},
+		{Name: "avx512vl", Feature: &X86.HasAVX512VL},
+		{Name: "avx512bw", Feature: &X86.HasAVX512BW},
+		{Name: "avx512dq", Feature: &X86.HasAVX512DQ},
+		{Name: "avx512ifma", Feature: &X86.HasAVX512IFMA},
+		{Name: "avx512vbmi", Feature: &X86.HasAVX512VBMI},
+		{Name: "avx512vnniw", Feature: &X86.HasAVX5124VNNIW},
+		{Name: "avx5124fmaps", Feature: &X86.HasAVX5124FMAPS},
+		{Name: "avx512vpopcntdq", Feature: &X86.HasAVX512VPOPCNTDQ},
+		{Name: "avx512vpclmulqdq", Feature: &X86.HasAVX512VPCLMULQDQ},
+		{Name: "avx512vnni", Feature: &X86.HasAVX512VNNI},
+		{Name: "avx512gfni", Feature: &X86.HasAVX512GFNI},
+		{Name: "avx512vaes", Feature: &X86.HasAVX512VAES},
+		{Name: "avx512vbmi2", Feature: &X86.HasAVX512VBMI2},
+		{Name: "avx512bitalg", Feature: &X86.HasAVX512BITALG},
+		{Name: "avx512bf16", Feature: &X86.HasAVX512BF16},
 		{Name: "bmi1", Feature: &X86.HasBMI1},
 		{Name: "bmi2", Feature: &X86.HasBMI2},
 		{Name: "erms", Feature: &X86.HasERMS},
@@ -59,12 +80,15 @@ func archInit() {
 	X86.HasOSXSAVE = isSet(27, ecx1)
 	X86.HasRDRAND = isSet(30, ecx1)
 
-	osSupportsAVX := false
+	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)
+
+		// Check if OPMASK and ZMM registers have OS support.
+		osSupportsAVX512 = osSupportsAVX && isSet(5, eax) && isSet(6, eax) && isSet(7, eax)
 	}
 
 	X86.HasAVX = isSet(28, ecx1) && osSupportsAVX
@@ -73,7 +97,7 @@ func archInit() {
 		return
 	}
 
-	_, ebx7, _, _ := cpuid(7, 0)
+	_, ebx7, ecx7, edx7 := cpuid(7, 0)
 	X86.HasBMI1 = isSet(3, ebx7)
 	X86.HasAVX2 = isSet(5, ebx7) && osSupportsAVX
 	X86.HasBMI2 = isSet(8, ebx7)
@@ -81,6 +105,30 @@ func archInit() {
 	X86.HasRDSEED = isSet(18, ebx7)
 	X86.HasADX = isSet(19, ebx7)
 
+	X86.HasAVX512 = isSet(16, ebx7) && 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)
+
+		eax71, _, _, _ := cpuid(7, 1)
+		X86.HasAVX512BF16 = isSet(5, eax71)
+	}
 }
 
 func isSet(bitpos uint, value uint32) bool {

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

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // +build 386 amd64 amd64p32
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

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

@@ -0,0 +1,10 @@
+// Copyright 2020 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
+
+func archInit() {
+	doinit()
+	Initialized = true
+}

vendor/golang.org/x/sys/cpu/cpu_zos_s390x.go

@@ -0,0 +1,25 @@
+// Copyright 2020 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
+
+func initS390Xbase() {
+	// get the facilities list
+	facilities := stfle()
+
+	// mandatory
+	S390X.HasZARCH = facilities.Has(zarch)
+	S390X.HasSTFLE = facilities.Has(stflef)
+	S390X.HasLDISP = facilities.Has(ldisp)
+	S390X.HasEIMM = facilities.Has(eimm)
+
+	// optional
+	S390X.HasETF3EH = facilities.Has(etf3eh)
+	S390X.HasDFP = facilities.Has(dfp)
+	S390X.HasMSA = facilities.Has(msa)
+	S390X.HasVX = facilities.Has(vx)
+	if S390X.HasVX {
+		S390X.HasVXE = facilities.Has(vxe)
+	}
+}

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

@@ -8,8 +8,8 @@
 // Morever, this file will be used during the building of
 // gccgo's libgo and thus must not used a CGo method.
 
-// +build aix
+//go:build aix && gccgo
-// +build gccgo
+// +build aix,gccgo
 
 package cpu
 

vendor/golang.org/x/sys/cpu/syscall_aix_ppc64_gc.go

@@ -6,8 +6,8 @@
 // system call on AIX without depending on x/sys/unix.
 // (See golang.org/issue/32102)
 
-// +build aix,ppc64
+//go:build aix && ppc64 && gc
-// +build !gccgo
+// +build aix,ppc64,gc
 
 package cpu
 

vendor/golang.org/x/sys/unix/aliases.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+//go:build (aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos) && go1.9
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
 // +build go1.9
 
 package unix

vendor/golang.org/x/sys/unix/asm_aix_ppc64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_bsd_386.s

@@ -1,14 +1,14 @@
-// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2021 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 !gccgo
+//go:build (darwin || freebsd || netbsd || openbsd) && gc
+// +build darwin freebsd netbsd openbsd
+// +build gc
 
 #include "textflag.h"
 
-//
+// System call support for 386 BSD
-// System call support for 386, FreeBSD
-//
 
 // Just jump to package syscall's implementation for all these functions.
 // The runtime may know about them.
@@ -22,7 +22,7 @@ TEXT	·Syscall6(SB),NOSPLIT,$0-40
 TEXT	·Syscall9(SB),NOSPLIT,$0-52
 	JMP	syscall·Syscall9(SB)
 
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
 	JMP	syscall·RawSyscall(SB)
 
 TEXT	·RawSyscall6(SB),NOSPLIT,$0-40

vendor/golang.org/x/sys/unix/asm_bsd_amd64.s

@@ -1,14 +1,14 @@
-// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2021 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 !gccgo
+//go:build (darwin || dragonfly || freebsd || netbsd || openbsd) && gc
+// +build darwin dragonfly freebsd netbsd openbsd
+// +build gc
 
 #include "textflag.h"
 
-//
+// System call support for AMD64 BSD
-// System call support for AMD64, OpenBSD
-//
 
 // Just jump to package syscall's implementation for all these functions.
 // The runtime may know about them.

vendor/golang.org/x/sys/unix/asm_bsd_arm.s

@@ -1,14 +1,14 @@
-// Copyright 2012 The Go Authors. All rights reserved.
+// Copyright 2021 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 !gccgo
+//go:build (darwin || freebsd || netbsd || openbsd) && gc
+// +build darwin freebsd netbsd openbsd
+// +build gc
 
 #include "textflag.h"
 
-//
+// System call support for ARM BSD
-// System call support for ARM, FreeBSD
-//
 
 // Just jump to package syscall's implementation for all these functions.
 // The runtime may know about them.

vendor/golang.org/x/sys/unix/asm_bsd_arm64.s

@@ -1,14 +1,14 @@
-// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2021 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 !gccgo
+//go:build (darwin || freebsd || netbsd || openbsd) && gc
+// +build darwin freebsd netbsd openbsd
+// +build gc
 
 #include "textflag.h"
 
-//
+// System call support for ARM64 BSD
-// System call support for AMD64, NetBSD
-//
 
 // Just jump to package syscall's implementation for all these functions.
 // The runtime may know about them.

vendor/golang.org/x/sys/unix/asm_darwin_386.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for 386, Darwin
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_amd64.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for AMD64, Darwin
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_arm.s

@@ -1,30 +0,0 @@
-// Copyright 2015 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 !gccgo
-// +build arm,darwin
-
-#include "textflag.h"
-
-//
-// System call support for ARM, Darwin
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_arm64.s

@@ -1,30 +0,0 @@
-// Copyright 2015 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 !gccgo
-// +build arm64,darwin
-
-#include "textflag.h"
-
-//
-// System call support for AMD64, Darwin
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_dragonfly_amd64.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for AMD64, DragonFly
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_freebsd_amd64.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for AMD64, FreeBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_freebsd_arm64.s

@@ -1,29 +0,0 @@
-// 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for ARM64, FreeBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_linux_386.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_amd64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_arm.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_arm64.s

@@ -4,7 +4,7 @@
 
 // +build linux
 // +build arm64
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_mips64x.s

@@ -4,7 +4,7 @@
 
 // +build linux
 // +build mips64 mips64le
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_mipsx.s

@@ -4,7 +4,7 @@
 
 // +build linux
 // +build mips mipsle
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_ppc64x.s

@@ -4,7 +4,7 @@
 
 // +build linux
 // +build ppc64 ppc64le
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_riscv64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build riscv64,!gccgo
+// +build riscv64,gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_linux_s390x.s

@@ -4,7 +4,7 @@
 
 // +build s390x
 // +build linux
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_netbsd_386.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for 386, NetBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_netbsd_arm.s

@@ -1,29 +0,0 @@
-// Copyright 2013 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for ARM, NetBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_netbsd_arm64.s

@@ -1,29 +0,0 @@
-// Copyright 2019 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for ARM64, NetBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_openbsd_386.s

@@ -1,29 +0,0 @@
-// Copyright 2009 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for 386, OpenBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	JMP	syscall·Syscall9(SB)
-
-TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_openbsd_arm.s

@@ -1,29 +0,0 @@
-// Copyright 2017 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for ARM, OpenBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-28
-	B	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	B	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	B	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	B	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_openbsd_arm64.s

@@ -1,29 +0,0 @@
-// Copyright 2019 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 !gccgo
-
-#include "textflag.h"
-
-//
-// System call support for arm64, OpenBSD
-//
-
-// Just jump to package syscall's implementation for all these functions.
-// The runtime may know about them.
-
-TEXT	·Syscall(SB),NOSPLIT,$0-56
-	JMP	syscall·Syscall(SB)
-
-TEXT	·Syscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·Syscall6(SB)
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-104
-	JMP	syscall·Syscall9(SB)
-
-TEXT	·RawSyscall(SB),NOSPLIT,$0-56
-	JMP	syscall·RawSyscall(SB)
-
-TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
-	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_openbsd_mips64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_solaris_amd64.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !gccgo
+// +build gc
 
 #include "textflag.h"
 

vendor/golang.org/x/sys/unix/asm_zos_s390x.s

@@ -0,0 +1,426 @@
+// Copyright 2020 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.
+
+//go:build zos && s390x && gc
+// +build zos
+// +build s390x
+// +build gc
+
+#include "textflag.h"
+
+#define PSALAA            1208(R0)
+#define GTAB64(x)           80(x)
+#define LCA64(x)            88(x)
+#define CAA(x)               8(x)
+#define EDCHPXV(x)        1016(x)       // in the CAA
+#define SAVSTACK_ASYNC(x)  336(x)       // in the LCA
+
+// SS_*, where x=SAVSTACK_ASYNC
+#define SS_LE(x)             0(x)
+#define SS_GO(x)             8(x)
+#define SS_ERRNO(x)         16(x)
+#define SS_ERRNOJR(x)       20(x)
+
+#define LE_CALL BYTE $0x0D; BYTE $0x76; // BL R7, R6
+
+TEXT ·clearErrno(SB),NOSPLIT,$0-0
+	BL	addrerrno<>(SB)
+	MOVD	$0, 0(R3)
+	RET
+
+// Returns the address of errno in R3.
+TEXT addrerrno<>(SB),NOSPLIT|NOFRAME,$0-0
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get __errno FuncDesc.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	ADD	$(0x156*16), R9
+	LMG	0(R9), R5, R6
+
+	// Switch to saved LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Call __errno function.
+	LE_CALL
+	NOPH
+
+	// Switch back to Go stack.
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+	RET
+
+TEXT ·syscall_syscall(SB),NOSPLIT,$0-56
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+32(FP)
+	MOVD	R0, r2+40(FP)
+	MOVD	R0, err+48(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	addrerrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+48(FP)
+done:
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·syscall_rawsyscall(SB),NOSPLIT,$0-56
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+32(FP)
+	MOVD	R0, r2+40(FP)
+	MOVD	R0, err+48(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	addrerrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+48(FP)
+done:
+	RET
+
+TEXT ·syscall_syscall6(SB),NOSPLIT,$0-80
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Fill in parameter list.
+	MOVD	a4+32(FP), R12
+	MOVD	R12, (2176+24)(R4)
+	MOVD	a5+40(FP), R12
+	MOVD	R12, (2176+32)(R4)
+	MOVD	a6+48(FP), R12
+	MOVD	R12, (2176+40)(R4)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+56(FP)
+	MOVD	R0, r2+64(FP)
+	MOVD	R0, err+72(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	addrerrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+72(FP)
+done:
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·syscall_rawsyscall6(SB),NOSPLIT,$0-80
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Fill in parameter list.
+	MOVD	a4+32(FP), R12
+	MOVD	R12, (2176+24)(R4)
+	MOVD	a5+40(FP), R12
+	MOVD	R12, (2176+32)(R4)
+	MOVD	a6+48(FP), R12
+	MOVD	R12, (2176+40)(R4)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+56(FP)
+	MOVD	R0, r2+64(FP)
+	MOVD	R0, err+72(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	·rrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+72(FP)
+done:
+	RET
+
+TEXT ·syscall_syscall9(SB),NOSPLIT,$0
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Fill in parameter list.
+	MOVD	a4+32(FP), R12
+	MOVD	R12, (2176+24)(R4)
+	MOVD	a5+40(FP), R12
+	MOVD	R12, (2176+32)(R4)
+	MOVD	a6+48(FP), R12
+	MOVD	R12, (2176+40)(R4)
+	MOVD	a7+56(FP), R12
+	MOVD	R12, (2176+48)(R4)
+	MOVD	a8+64(FP), R12
+	MOVD	R12, (2176+56)(R4)
+	MOVD	a9+72(FP), R12
+	MOVD	R12, (2176+64)(R4)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+80(FP)
+	MOVD	R0, r2+88(FP)
+	MOVD	R0, err+96(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	addrerrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+96(FP)
+done:
+        BL	runtime·exitsyscall(SB)
+        RET
+
+TEXT ·syscall_rawsyscall9(SB),NOSPLIT,$0
+	MOVD	a1+8(FP), R1
+	MOVD	a2+16(FP), R2
+	MOVD	a3+24(FP), R3
+
+	// Get library control area (LCA).
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+
+	// Get function.
+	MOVD	CAA(R8), R9
+	MOVD	EDCHPXV(R9), R9
+	MOVD	trap+0(FP), R5
+	SLD	$4, R5
+	ADD	R5, R9
+	LMG	0(R9), R5, R6
+
+	// Restore LE stack.
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R4
+	MOVD	$0, 0(R9)
+
+	// Fill in parameter list.
+	MOVD	a4+32(FP), R12
+	MOVD	R12, (2176+24)(R4)
+	MOVD	a5+40(FP), R12
+	MOVD	R12, (2176+32)(R4)
+	MOVD	a6+48(FP), R12
+	MOVD	R12, (2176+40)(R4)
+	MOVD	a7+56(FP), R12
+	MOVD	R12, (2176+48)(R4)
+	MOVD	a8+64(FP), R12
+	MOVD	R12, (2176+56)(R4)
+	MOVD	a9+72(FP), R12
+	MOVD	R12, (2176+64)(R4)
+
+	// Call function.
+	LE_CALL
+	NOPH
+	XOR	R0, R0      // Restore R0 to $0.
+	MOVD	R4, 0(R9)   // Save stack pointer.
+
+	MOVD	R3, r1+80(FP)
+	MOVD	R0, r2+88(FP)
+	MOVD	R0, err+96(FP)
+	MOVW	R3, R4
+	CMP	R4, $-1
+	BNE	done
+	BL	addrerrno<>(SB)
+	MOVWZ	0(R3), R3
+	MOVD	R3, err+96(FP)
+done:
+	RET
+
+// func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64)
+TEXT ·svcCall(SB),NOSPLIT,$0
+	BL	runtime·save_g(SB)   // Save g and stack pointer
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	R15, 0(R9)
+
+	MOVD	argv+8(FP), R1       // Move function arguments into registers
+	MOVD	dsa+16(FP), g
+	MOVD	fnptr+0(FP), R15
+
+	BYTE	$0x0D                // Branch to function
+	BYTE	$0xEF
+
+	BL	runtime·load_g(SB)   // Restore g and stack pointer
+	MOVW	PSALAA, R8
+	MOVD	LCA64(R8), R8
+	MOVD	SAVSTACK_ASYNC(R8), R9
+	MOVD	0(R9), R15
+
+	RET
+
+// func svcLoad(name *byte) unsafe.Pointer
+TEXT ·svcLoad(SB),NOSPLIT,$0
+	MOVD	R15, R2          // Save go stack pointer
+	MOVD	name+0(FP), R0   // Move SVC args into registers
+	MOVD	$0x80000000, R1
+	MOVD	$0, R15
+	BYTE	$0x0A            // SVC 08 LOAD
+	BYTE	$0x08
+	MOVW	R15, R3          // Save return code from SVC
+	MOVD	R2, R15          // Restore go stack pointer
+	CMP	R3, $0           // Check SVC return code
+	BNE	error
+
+	MOVD	$-2, R3          // Reset last bit of entry point to zero
+	AND	R0, R3
+	MOVD	R3, addr+8(FP)   // Return entry point returned by SVC
+	CMP	R0, R3           // Check if last bit of entry point was set
+	BNE	done
+
+	MOVD	R15, R2          // Save go stack pointer
+	MOVD	$0, R15          // Move SVC args into registers (entry point still in r0 from SVC 08)
+	BYTE	$0x0A            // SVC 09 DELETE
+	BYTE	$0x09
+	MOVD	R2, R15          // Restore go stack pointer
+
+error:
+	MOVD	$0, addr+8(FP)   // Return 0 on failure
+done:
+	XOR	R0, R0           // Reset r0 to 0
+	RET
+
+// func svcUnload(name *byte, fnptr unsafe.Pointer) int64
+TEXT ·svcUnload(SB),NOSPLIT,$0
+	MOVD	R15, R2          // Save go stack pointer
+	MOVD	name+0(FP), R0   // Move SVC args into registers
+	MOVD	addr+8(FP), R15
+	BYTE	$0x0A            // SVC 09
+	BYTE	$0x09
+	XOR	R0, R0           // Reset r0 to 0
+	MOVD	R15, R1          // Save SVC return code
+	MOVD	R2, R15          // Restore go stack pointer
+	MOVD	R1, rc+0(FP)     // Return SVC return code
+	RET
+
+// func gettid() uint64
+TEXT ·gettid(SB), NOSPLIT, $0
+	// Get library control area (LCA).
+	MOVW PSALAA, R8
+	MOVD LCA64(R8), R8
+
+	// Get CEECAATHDID
+	MOVD CAA(R8), R9
+	MOVD 0x3D0(R9), R9
+	MOVD R9, ret+0(FP)
+
+	RET

vendor/golang.org/x/sys/unix/cap_freebsd.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build freebsd
 // +build freebsd
 
 package unix

vendor/golang.org/x/sys/unix/constants.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
 
 package unix
 

vendor/golang.org/x/sys/unix/dev_aix_ppc.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix
+//go:build aix && ppc
-// +build ppc
+// +build aix,ppc
 
 // Functions to access/create device major and minor numbers matching the
 // encoding used by AIX.

vendor/golang.org/x/sys/unix/dev_aix_ppc64.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix
+//go:build aix && ppc64
-// +build ppc64
+// +build aix,ppc64
 
 // Functions to access/create device major and minor numbers matching the
 // encoding used AIX.

vendor/golang.org/x/sys/unix/dev_zos.go

@@ -0,0 +1,29 @@
+// Copyright 2020 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.
+
+//go:build zos && s390x
+// +build zos,s390x
+
+// Functions to access/create device major and minor numbers matching the
+// encoding used by z/OS.
+//
+// The information below is extracted and adapted from <sys/stat.h> macros.
+
+package unix
+
+// Major returns the major component of a z/OS device number.
+func Major(dev uint64) uint32 {
+	return uint32((dev >> 16) & 0x0000FFFF)
+}
+
+// Minor returns the minor component of a z/OS device number.
+func Minor(dev uint64) uint32 {
+	return uint32(dev & 0x0000FFFF)
+}
+
+// Mkdev returns a z/OS device number generated from the given major and minor
+// components.
+func Mkdev(major, minor uint32) uint64 {
+	return (uint64(major) << 16) | uint64(minor)
+}

vendor/golang.org/x/sys/unix/dirent.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package unix

vendor/golang.org/x/sys/unix/endian_big.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-// +build ppc64 s390x mips mips64
+//go:build armbe || arm64be || m68k || mips || mips64 || mips64p32 || ppc || ppc64 || s390 || s390x || shbe || sparc || sparc64
+// +build armbe arm64be m68k mips mips64 mips64p32 ppc ppc64 s390 s390x shbe sparc sparc64
 
 package unix
 

vendor/golang.org/x/sys/unix/endian_little.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-// +build 386 amd64 amd64p32 arm arm64 ppc64le mipsle mips64le riscv64
+//go:build 386 || amd64 || amd64p32 || alpha || arm || arm64 || mipsle || mips64le || mips64p32le || nios2 || ppc64le || riscv || riscv64 || sh
+// +build 386 amd64 amd64p32 alpha arm arm64 mipsle mips64le mips64p32le nios2 ppc64le riscv riscv64 sh
 
 package unix
 

vendor/golang.org/x/sys/unix/env_unix.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
 
 // Unix environment variables.
 

vendor/golang.org/x/sys/unix/epoll_zos.go

@@ -0,0 +1,221 @@
+// Copyright 2020 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.
+
+//go:build zos && s390x
+// +build zos,s390x
+
+package unix
+
+import (
+	"sync"
+)
+
+// This file simulates epoll on z/OS using poll.
+
+// Analogous to epoll_event on Linux.
+// TODO(neeilan): Pad is because the Linux kernel expects a 96-bit struct. We never pass this to the kernel; remove?
+type EpollEvent struct {
+	Events uint32
+	Fd     int32
+	Pad    int32
+}
+
+const (
+	EPOLLERR      = 0x8
+	EPOLLHUP      = 0x10
+	EPOLLIN       = 0x1
+	EPOLLMSG      = 0x400
+	EPOLLOUT      = 0x4
+	EPOLLPRI      = 0x2
+	EPOLLRDBAND   = 0x80
+	EPOLLRDNORM   = 0x40
+	EPOLLWRBAND   = 0x200
+	EPOLLWRNORM   = 0x100
+	EPOLL_CTL_ADD = 0x1
+	EPOLL_CTL_DEL = 0x2
+	EPOLL_CTL_MOD = 0x3
+	// The following constants are part of the epoll API, but represent
+	// currently unsupported functionality on z/OS.
+	// EPOLL_CLOEXEC  = 0x80000
+	// EPOLLET        = 0x80000000
+	// EPOLLONESHOT   = 0x40000000
+	// EPOLLRDHUP     = 0x2000     // Typically used with edge-triggered notis
+	// EPOLLEXCLUSIVE = 0x10000000 // Exclusive wake-up mode
+	// EPOLLWAKEUP    = 0x20000000 // Relies on Linux's BLOCK_SUSPEND capability
+)
+
+// TODO(neeilan): We can eliminate these epToPoll / pToEpoll calls by using identical mask values for POLL/EPOLL
+// constants where possible The lower 16 bits of epoll events (uint32) can fit any system poll event (int16).
+
+// epToPollEvt converts epoll event field to poll equivalent.
+// In epoll, Events is a 32-bit field, while poll uses 16 bits.
+func epToPollEvt(events uint32) int16 {
+	var ep2p = map[uint32]int16{
+		EPOLLIN:  POLLIN,
+		EPOLLOUT: POLLOUT,
+		EPOLLHUP: POLLHUP,
+		EPOLLPRI: POLLPRI,
+		EPOLLERR: POLLERR,
+	}
+
+	var pollEvts int16 = 0
+	for epEvt, pEvt := range ep2p {
+		if (events & epEvt) != 0 {
+			pollEvts |= pEvt
+		}
+	}
+
+	return pollEvts
+}
+
+// pToEpollEvt converts 16 bit poll event bitfields to 32-bit epoll event fields.
+func pToEpollEvt(revents int16) uint32 {
+	var p2ep = map[int16]uint32{
+		POLLIN:  EPOLLIN,
+		POLLOUT: EPOLLOUT,
+		POLLHUP: EPOLLHUP,
+		POLLPRI: EPOLLPRI,
+		POLLERR: EPOLLERR,
+	}
+
+	var epollEvts uint32 = 0
+	for pEvt, epEvt := range p2ep {
+		if (revents & pEvt) != 0 {
+			epollEvts |= epEvt
+		}
+	}
+
+	return epollEvts
+}
+
+// Per-process epoll implementation.
+type epollImpl struct {
+	mu       sync.Mutex
+	epfd2ep  map[int]*eventPoll
+	nextEpfd int
+}
+
+// eventPoll holds a set of file descriptors being watched by the process. A process can have multiple epoll instances.
+// On Linux, this is an in-kernel data structure accessed through a fd.
+type eventPoll struct {
+	mu  sync.Mutex
+	fds map[int]*EpollEvent
+}
+
+// epoll impl for this process.
+var impl epollImpl = epollImpl{
+	epfd2ep:  make(map[int]*eventPoll),
+	nextEpfd: 0,
+}
+
+func (e *epollImpl) epollcreate(size int) (epfd int, err error) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	epfd = e.nextEpfd
+	e.nextEpfd++
+
+	e.epfd2ep[epfd] = &eventPoll{
+		fds: make(map[int]*EpollEvent),
+	}
+	return epfd, nil
+}
+
+func (e *epollImpl) epollcreate1(flag int) (fd int, err error) {
+	return e.epollcreate(4)
+}
+
+func (e *epollImpl) epollctl(epfd int, op int, fd int, event *EpollEvent) (err error) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	ep, ok := e.epfd2ep[epfd]
+	if !ok {
+
+		return EBADF
+	}
+
+	switch op {
+	case EPOLL_CTL_ADD:
+		// TODO(neeilan): When we make epfds and fds disjoint, detect epoll
+		// loops here (instances watching each other) and return ELOOP.
+		if _, ok := ep.fds[fd]; ok {
+			return EEXIST
+		}
+		ep.fds[fd] = event
+	case EPOLL_CTL_MOD:
+		if _, ok := ep.fds[fd]; !ok {
+			return ENOENT
+		}
+		ep.fds[fd] = event
+	case EPOLL_CTL_DEL:
+		if _, ok := ep.fds[fd]; !ok {
+			return ENOENT
+		}
+		delete(ep.fds, fd)
+
+	}
+	return nil
+}
+
+// Must be called while holding ep.mu
+func (ep *eventPoll) getFds() []int {
+	fds := make([]int, len(ep.fds))
+	for fd := range ep.fds {
+		fds = append(fds, fd)
+	}
+	return fds
+}
+
+func (e *epollImpl) epollwait(epfd int, events []EpollEvent, msec int) (n int, err error) {
+	e.mu.Lock() // in [rare] case of concurrent epollcreate + epollwait
+	ep, ok := e.epfd2ep[epfd]
+
+	if !ok {
+		e.mu.Unlock()
+		return 0, EBADF
+	}
+
+	pollfds := make([]PollFd, 4)
+	for fd, epollevt := range ep.fds {
+		pollfds = append(pollfds, PollFd{Fd: int32(fd), Events: epToPollEvt(epollevt.Events)})
+	}
+	e.mu.Unlock()
+
+	n, err = Poll(pollfds, msec)
+	if err != nil {
+		return n, err
+	}
+
+	i := 0
+	for _, pFd := range pollfds {
+		if pFd.Revents != 0 {
+			events[i] = EpollEvent{Fd: pFd.Fd, Events: pToEpollEvt(pFd.Revents)}
+			i++
+		}
+
+		if i == n {
+			break
+		}
+	}
+
+	return n, nil
+}
+
+func EpollCreate(size int) (fd int, err error) {
+	return impl.epollcreate(size)
+}
+
+func EpollCreate1(flag int) (fd int, err error) {
+	return impl.epollcreate1(flag)
+}
+
+func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
+	return impl.epollctl(epfd, op, fd, event)
+}
+
+// Because EpollWait mutates events, the caller is expected to coordinate
+// concurrent access if calling with the same epfd from multiple goroutines.
+func EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) {
+	return impl.epollwait(epfd, events, msec)
+}

vendor/golang.org/x/sys/unix/fcntl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build dragonfly || freebsd || linux || netbsd || openbsd
 // +build dragonfly freebsd linux netbsd openbsd
 
 package unix

vendor/golang.org/x/sys/unix/fcntl_linux_32bit.go

@@ -1,9 +1,10 @@
-// +build linux,386 linux,arm linux,mips linux,mipsle
-
 // Copyright 2014 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.
 
+//go:build (linux && 386) || (linux && arm) || (linux && mips) || (linux && mipsle)
+// +build linux,386 linux,arm linux,mips linux,mipsle
+
 package unix
 
 func init() {

vendor/golang.org/x/sys/unix/fdset.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package unix

vendor/golang.org/x/sys/unix/fstatfs_zos.go

@@ -0,0 +1,164 @@
+// Copyright 2020 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.
+
+//go:build zos && s390x
+// +build zos,s390x
+
+package unix
+
+import (
+	"unsafe"
+)
+
+// This file simulates fstatfs on z/OS using fstatvfs and w_getmntent.
+
+func Fstatfs(fd int, stat *Statfs_t) (err error) {
+	var stat_v Statvfs_t
+	err = Fstatvfs(fd, &stat_v)
+	if err == nil {
+		// populate stat
+		stat.Type = 0
+		stat.Bsize = stat_v.Bsize
+		stat.Blocks = stat_v.Blocks
+		stat.Bfree = stat_v.Bfree
+		stat.Bavail = stat_v.Bavail
+		stat.Files = stat_v.Files
+		stat.Ffree = stat_v.Ffree
+		stat.Fsid = stat_v.Fsid
+		stat.Namelen = stat_v.Namemax
+		stat.Frsize = stat_v.Frsize
+		stat.Flags = stat_v.Flag
+		for passn := 0; passn < 5; passn++ {
+			switch passn {
+			case 0:
+				err = tryGetmntent64(stat)
+				break
+			case 1:
+				err = tryGetmntent128(stat)
+				break
+			case 2:
+				err = tryGetmntent256(stat)
+				break
+			case 3:
+				err = tryGetmntent512(stat)
+				break
+			case 4:
+				err = tryGetmntent1024(stat)
+				break
+			default:
+				break
+			}
+			//proceed to return if: err is nil (found), err is nonnil but not ERANGE (another error occurred)
+			if err == nil || err != nil && err != ERANGE {
+				break
+			}
+		}
+	}
+	return err
+}
+
+func tryGetmntent64(stat *Statfs_t) (err error) {
+	var mnt_ent_buffer struct {
+		header       W_Mnth
+		filesys_info [64]W_Mntent
+	}
+	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
+	fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
+	if err != nil {
+		return err
+	}
+	err = ERANGE //return ERANGE if no match is found in this batch
+	for i := 0; i < fs_count; i++ {
+		if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
+			stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
+			err = nil
+			break
+		}
+	}
+	return err
+}
+
+func tryGetmntent128(stat *Statfs_t) (err error) {
+	var mnt_ent_buffer struct {
+		header       W_Mnth
+		filesys_info [128]W_Mntent
+	}
+	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
+	fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
+	if err != nil {
+		return err
+	}
+	err = ERANGE //return ERANGE if no match is found in this batch
+	for i := 0; i < fs_count; i++ {
+		if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
+			stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
+			err = nil
+			break
+		}
+	}
+	return err
+}
+
+func tryGetmntent256(stat *Statfs_t) (err error) {
+	var mnt_ent_buffer struct {
+		header       W_Mnth
+		filesys_info [256]W_Mntent
+	}
+	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
+	fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
+	if err != nil {
+		return err
+	}
+	err = ERANGE //return ERANGE if no match is found in this batch
+	for i := 0; i < fs_count; i++ {
+		if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
+			stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
+			err = nil
+			break
+		}
+	}
+	return err
+}
+
+func tryGetmntent512(stat *Statfs_t) (err error) {
+	var mnt_ent_buffer struct {
+		header       W_Mnth
+		filesys_info [512]W_Mntent
+	}
+	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
+	fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
+	if err != nil {
+		return err
+	}
+	err = ERANGE //return ERANGE if no match is found in this batch
+	for i := 0; i < fs_count; i++ {
+		if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
+			stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
+			err = nil
+			break
+		}
+	}
+	return err
+}
+
+func tryGetmntent1024(stat *Statfs_t) (err error) {
+	var mnt_ent_buffer struct {
+		header       W_Mnth
+		filesys_info [1024]W_Mntent
+	}
+	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
+	fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
+	if err != nil {
+		return err
+	}
+	err = ERANGE //return ERANGE if no match is found in this batch
+	for i := 0; i < fs_count; i++ {
+		if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
+			stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
+			err = nil
+			break
+		}
+	}
+	return err
+}

vendor/golang.org/x/sys/unix/gccgo.go

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build gccgo
+//go:build gccgo && !aix
-// +build !aix
+// +build gccgo,!aix
 
 package unix
 
@@ -12,10 +12,8 @@ import "syscall"
 // We can't use the gc-syntax .s files for gccgo. On the plus side
 // much of the functionality can be written directly in Go.
 
-//extern gccgoRealSyscallNoError
 func realSyscallNoError(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r uintptr)
 
-//extern gccgoRealSyscall
 func realSyscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r, errno uintptr)
 
 func SyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr) {

vendor/golang.org/x/sys/unix/gccgo_c.c

@@ -21,6 +21,9 @@ struct ret {
 	uintptr_t err;
 };
 
+struct ret gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
+  __asm__(GOSYM_PREFIX GOPKGPATH ".realSyscall");
+
 struct ret
 gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
 {
@@ -32,6 +35,9 @@ gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintp
 	return r;
 }
 
+uintptr_t gccgoRealSyscallNoError(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
+  __asm__(GOSYM_PREFIX GOPKGPATH ".realSyscallNoError");
+
 uintptr_t
 gccgoRealSyscallNoError(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
 {

vendor/golang.org/x/sys/unix/gccgo_linux_amd64.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build gccgo && linux && amd64
 // +build gccgo,linux,amd64
 
 package unix

vendor/golang.org/x/sys/unix/ioctl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package unix