[dev.typeparams] internal/goarch,internal/goos: explode runtime/internal/sys into pieces

This change extracts the GOOS and GOARCH specific constants from
runtime/internal/sys into packages that are available to the entire
standard library.

This change does not yet update the runtime and associated packages to
use them, and instead adds constants to runtime/internal/sys to forward
the constants defined by these new packages.

Change-Id: I14d574b8d7bfe599ad25da29dc1b39716e35a734
Reviewed-on: https://go-review.googlesource.com/c/go/+/328336
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

src/cmd/go/internal/work/gc.go

@@ -29,6 +29,18 @@ import (
 // The 'path' used for GOROOT_FINAL when -trimpath is specified
 const trimPathGoRootFinal = "go"
 
+var runtimePackages = map[string]struct{}{
+	"internal/abi":            struct{}{},
+	"internal/bytealg":        struct{}{},
+	"internal/cpu":            struct{}{},
+	"internal/goarch":         struct{}{},
+	"internal/goos":           struct{}{},
+	"runtime":                 struct{}{},
+	"runtime/internal/atomic": struct{}{},
+	"runtime/internal/math":   struct{}{},
+	"runtime/internal/sys":    struct{}{},
+}
+
 // The Go toolchain.
 
 type gcToolchain struct{}
@@ -88,11 +100,8 @@ func (gcToolchain) gc(b *Builder, a *Action, archive string, importcfg, embedcfg
 	if p.Standard {
 		gcargs = append(gcargs, "-std")
 	}
-	compilingRuntime := p.Standard && (p.ImportPath == "runtime" || strings.HasPrefix(p.ImportPath, "runtime/internal"))
-	// The runtime package imports a couple of general internal packages.
-	if p.Standard && (p.ImportPath == "internal/cpu" || p.ImportPath == "internal/bytealg" || p.ImportPath == "internal/abi") {
-		compilingRuntime = true
-	}
+	_, compilingRuntime := runtimePackages[p.ImportPath]
+	compilingRuntime = compilingRuntime && p.Standard
 	if compilingRuntime {
 		// runtime compiles with a special gc flag to check for
 		// memory allocations that are invalid in the runtime package,

src/go/build/deps_test.go

@@ -71,7 +71,8 @@ var depsRules = `
 	# No dependencies allowed for any of these packages.
 	NONE
 	< container/list, container/ring,
-	  internal/cfg, internal/cpu, internal/goexperiment,
+	  internal/cfg, internal/cpu, internal/goarch,
+	  internal/goexperiment, internal/goos,
 	  internal/goversion, internal/nettrace,
 	  unicode/utf8, unicode/utf16, unicode,
 	  unsafe;
@@ -81,7 +82,8 @@ var depsRules = `
 	< internal/abi;
 
 	# RUNTIME is the core runtime group of packages, all of them very light-weight.
-	internal/abi, internal/cpu, internal/goexperiment, unsafe
+	internal/abi, internal/cpu, internal/goarch,
+	internal/goexperiment, internal/goos, unsafe
 	< internal/bytealg
 	< internal/itoa
 	< internal/unsafeheader

src/internal/goarch/gengoarch.go

@@ -0,0 +1,59 @@
+// 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 ignore
+// +build ignore
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+var goarches []string
+
+func main() {
+	data, err := os.ReadFile("../../go/build/syslist.go")
+	if err != nil {
+		log.Fatal(err)
+	}
+	const goarchPrefix = `const goarchList = `
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.HasPrefix(line, goarchPrefix) {
+			text, err := strconv.Unquote(strings.TrimPrefix(line, goarchPrefix))
+			if err != nil {
+				log.Fatalf("parsing goarchList: %v", err)
+			}
+			goarches = strings.Fields(text)
+		}
+	}
+
+	for _, target := range goarches {
+		if target == "amd64p32" {
+			continue
+		}
+		var buf bytes.Buffer
+		fmt.Fprintf(&buf, "// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.\n\n")
+		fmt.Fprintf(&buf, "//go:build %s\n", target)
+		fmt.Fprintf(&buf, "// +build %s\n\n", target) // must explicitly include target for bootstrapping purposes
+		fmt.Fprintf(&buf, "package goarch\n\n")
+		fmt.Fprintf(&buf, "const GOARCH = `%s`\n\n", target)
+		for _, goarch := range goarches {
+			value := 0
+			if goarch == target {
+				value = 1
+			}
+			fmt.Fprintf(&buf, "const Goarch%s = %d\n", strings.Title(goarch), value)
+		}
+		err := os.WriteFile("zgoarch_"+target+".go", buf.Bytes(), 0666)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+}

src/internal/goarch/goarch.go

@@ -1,8 +1,15 @@
-// Copyright 2014 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.
 
-package sys
+// package goarch contains GOARCH-specific constants.
+package goarch
+
+// The next line makes 'go generate' write the zgoarch*.go files with
+// per-arch information, including constants named Goarch$GOARCH for every
+// GOARCH. The constant is 1 on the current system, 0 otherwise; multiplying
+// by them is useful for defining GOARCH-specific constants.
+//go:generate go run gengoarch.go
 
 type ArchFamilyType int
 
@@ -23,9 +30,6 @@ const (
 // It is also the size of the machine's native word size (that is, 4 on 32-bit systems, 8 on 64-bit).
 const PtrSize = 4 << (^uintptr(0) >> 63)
 
-// AIX requires a larger stack for syscalls.
-const StackGuardMultiplier = StackGuardMultiplierDefault*(1-GoosAix) + 2*GoosAix
-
 // ArchFamily is the architecture family (AMD64, ARM, ...)
 const ArchFamily ArchFamilyType = _ArchFamily
 

src/internal/goarch/goarch_386.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = I386

src/internal/goarch/goarch_amd64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = AMD64

src/internal/goarch/goarch_arm.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = ARM

src/internal/goarch/goarch_arm64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = ARM64

src/internal/goarch/goarch_mips.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = MIPS

src/internal/goarch/goarch_mips64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = MIPS64

src/internal/goarch/goarch_mips64le.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = MIPS64

src/internal/goarch/goarch_mipsle.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = MIPS

src/internal/goarch/goarch_ppc64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = PPC64

src/internal/goarch/goarch_ppc64le.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = PPC64

src/internal/goarch/goarch_riscv64.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = RISCV64

src/internal/goarch/goarch_s390x.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = S390X

src/internal/goarch/goarch_wasm.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package sys
+package goarch
 
 const (
 	_ArchFamily          = WASM

src/internal/goarch/zgoarch_386.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build 386
 // +build 386
 
-package sys
+package goarch
 
 const GOARCH = `386`
 

src/internal/goarch/zgoarch_amd64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build amd64
 // +build amd64
 
-package sys
+package goarch
 
 const GOARCH = `amd64`
 

src/internal/goarch/zgoarch_arm.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build arm
 // +build arm
 
-package sys
+package goarch
 
 const GOARCH = `arm`
 

src/internal/goarch/zgoarch_arm64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build arm64
 // +build arm64
 
-package sys
+package goarch
 
 const GOARCH = `arm64`
 

src/internal/goarch/zgoarch_arm64be.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build arm64be
 // +build arm64be
 
-package sys
+package goarch
 
 const GOARCH = `arm64be`
 

src/internal/goarch/zgoarch_armbe.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build armbe
 // +build armbe
 
-package sys
+package goarch
 
 const GOARCH = `armbe`
 

src/internal/goarch/zgoarch_mips.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mips
 // +build mips
 
-package sys
+package goarch
 
 const GOARCH = `mips`
 

src/internal/goarch/zgoarch_mips64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mips64
 // +build mips64
 
-package sys
+package goarch
 
 const GOARCH = `mips64`
 

src/internal/goarch/zgoarch_mips64le.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mips64le
 // +build mips64le
 
-package sys
+package goarch
 
 const GOARCH = `mips64le`
 

src/internal/goarch/zgoarch_mips64p32.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mips64p32
 // +build mips64p32
 
-package sys
+package goarch
 
 const GOARCH = `mips64p32`
 

src/internal/goarch/zgoarch_mips64p32le.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mips64p32le
 // +build mips64p32le
 
-package sys
+package goarch
 
 const GOARCH = `mips64p32le`
 

src/internal/goarch/zgoarch_mipsle.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build mipsle
 // +build mipsle
 
-package sys
+package goarch
 
 const GOARCH = `mipsle`
 

src/internal/goarch/zgoarch_ppc.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build ppc
 // +build ppc
 
-package sys
+package goarch
 
 const GOARCH = `ppc`
 

src/internal/goarch/zgoarch_ppc64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build ppc64
 // +build ppc64
 
-package sys
+package goarch
 
 const GOARCH = `ppc64`
 

src/internal/goarch/zgoarch_ppc64le.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build ppc64le
 // +build ppc64le
 
-package sys
+package goarch
 
 const GOARCH = `ppc64le`
 

src/internal/goarch/zgoarch_riscv.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build riscv
 // +build riscv
 
-package sys
+package goarch
 
 const GOARCH = `riscv`
 

src/internal/goarch/zgoarch_riscv64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build riscv64
 // +build riscv64
 
-package sys
+package goarch
 
 const GOARCH = `riscv64`
 

src/internal/goarch/zgoarch_s390.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build s390
 // +build s390
 
-package sys
+package goarch
 
 const GOARCH = `s390`
 

src/internal/goarch/zgoarch_s390x.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build s390x
 // +build s390x
 
-package sys
+package goarch
 
 const GOARCH = `s390x`
 

src/internal/goarch/zgoarch_sparc.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build sparc
 // +build sparc
 
-package sys
+package goarch
 
 const GOARCH = `sparc`
 

src/internal/goarch/zgoarch_sparc64.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build sparc64
 // +build sparc64
 
-package sys
+package goarch
 
 const GOARCH = `sparc64`
 

src/internal/goarch/zgoarch_wasm.go

@@ -1,9 +1,9 @@
-// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+// Code generated by gengoarch.go using 'go generate'. DO NOT EDIT.
 
 //go:build wasm
 // +build wasm
 
-package sys
+package goarch
 
 const GOARCH = `wasm`
 

src/internal/goos/gengoos.go

@@ -16,17 +16,14 @@ import (
 	"strings"
 )
 
-var gooses, goarches []string
+var gooses []string
 
 func main() {
-	data, err := os.ReadFile("../../../go/build/syslist.go")
+	data, err := os.ReadFile("../../go/build/syslist.go")
 	if err != nil {
 		log.Fatal(err)
 	}
-	const (
-		goosPrefix   = `const goosList = `
-		goarchPrefix = `const goarchList = `
-	)
+	const goosPrefix = `const goosList = `
 	for _, line := range strings.Split(string(data), "\n") {
 		if strings.HasPrefix(line, goosPrefix) {
 			text, err := strconv.Unquote(strings.TrimPrefix(line, goosPrefix))
@@ -35,13 +32,6 @@ func main() {
 			}
 			gooses = strings.Fields(text)
 		}
-		if strings.HasPrefix(line, goarchPrefix) {
-			text, err := strconv.Unquote(strings.TrimPrefix(line, goarchPrefix))
-			if err != nil {
-				log.Fatalf("parsing goarchList: %v", err)
-			}
-			goarches = strings.Fields(text)
-		}
 	}
 
 	for _, target := range gooses {
@@ -63,7 +53,7 @@ func main() {
 		fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
 		fmt.Fprintf(&buf, "//go:build %s\n", strings.Join(tags, " && "))
 		fmt.Fprintf(&buf, "// +build %s\n\n", strings.Join(tags, ","))
-		fmt.Fprintf(&buf, "package sys\n\n")
+		fmt.Fprintf(&buf, "package goos\n\n")
 		fmt.Fprintf(&buf, "const GOOS = `%s`\n\n", target)
 		for _, goos := range gooses {
 			value := 0
@@ -77,27 +67,4 @@ func main() {
 			log.Fatal(err)
 		}
 	}
-
-	for _, target := range goarches {
-		if target == "amd64p32" {
-			continue
-		}
-		var buf bytes.Buffer
-		fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
-		fmt.Fprintf(&buf, "//go:build %s\n", target)
-		fmt.Fprintf(&buf, "// +build %s\n\n", target) // must explicitly include target for bootstrapping purposes
-		fmt.Fprintf(&buf, "package sys\n\n")
-		fmt.Fprintf(&buf, "const GOARCH = `%s`\n\n", target)
-		for _, goarch := range goarches {
-			value := 0
-			if goarch == target {
-				value = 1
-			}
-			fmt.Fprintf(&buf, "const Goarch%s = %d\n", strings.Title(goarch), value)
-		}
-		err := os.WriteFile("zgoarch_"+target+".go", buf.Bytes(), 0666)
-		if err != nil {
-			log.Fatal(err)
-		}
-	}
 }

src/internal/goos/goos.go

@@ -0,0 +1,12 @@
+// 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.
+
+// package goos contains GOOS-specific constants.
+package goos
+
+// The next line makes 'go generate' write the zgoos*.go files with
+// per-OS information, including constants named Goos$GOOS for every
+// known GOOS. The constant is 1 on the current system, 0 otherwise;
+// multiplying by them is useful for defining GOOS-specific constants.
+//go:generate go run gengoos.go

src/internal/goos/zgoos_aix.go

@@ -3,7 +3,7 @@
 //go:build aix
 // +build aix
 
-package sys
+package goos
 
 const GOOS = `aix`
 

src/internal/goos/zgoos_android.go

@@ -3,7 +3,7 @@
 //go:build android
 // +build android
 
-package sys
+package goos
 
 const GOOS = `android`
 

src/internal/goos/zgoos_darwin.go

@@ -3,7 +3,7 @@
 //go:build !ios && darwin
 // +build !ios,darwin
 
-package sys
+package goos
 
 const GOOS = `darwin`
 

src/internal/goos/zgoos_dragonfly.go

@@ -3,7 +3,7 @@
 //go:build dragonfly
 // +build dragonfly
 
-package sys
+package goos
 
 const GOOS = `dragonfly`
 

src/internal/goos/zgoos_freebsd.go

@@ -3,7 +3,7 @@
 //go:build freebsd
 // +build freebsd
 
-package sys
+package goos
 
 const GOOS = `freebsd`
 

src/internal/goos/zgoos_hurd.go

@@ -3,7 +3,7 @@
 //go:build hurd
 // +build hurd
 
-package sys
+package goos
 
 const GOOS = `hurd`
 

src/internal/goos/zgoos_illumos.go

@@ -3,7 +3,7 @@
 //go:build illumos
 // +build illumos
 
-package sys
+package goos
 
 const GOOS = `illumos`
 

src/internal/goos/zgoos_ios.go

@@ -3,7 +3,7 @@
 //go:build ios
 // +build ios
 
-package sys
+package goos
 
 const GOOS = `ios`
 

src/internal/goos/zgoos_js.go

@@ -3,7 +3,7 @@
 //go:build js
 // +build js
 
-package sys
+package goos
 
 const GOOS = `js`
 

src/internal/goos/zgoos_linux.go

@@ -3,7 +3,7 @@
 //go:build !android && linux
 // +build !android,linux
 
-package sys
+package goos
 
 const GOOS = `linux`
 

src/internal/goos/zgoos_netbsd.go

@@ -3,7 +3,7 @@
 //go:build netbsd
 // +build netbsd
 
-package sys
+package goos
 
 const GOOS = `netbsd`
 

src/internal/goos/zgoos_openbsd.go

@@ -3,7 +3,7 @@
 //go:build openbsd
 // +build openbsd
 
-package sys
+package goos
 
 const GOOS = `openbsd`
 

src/internal/goos/zgoos_plan9.go

@@ -3,7 +3,7 @@
 //go:build plan9
 // +build plan9
 
-package sys
+package goos
 
 const GOOS = `plan9`
 

src/internal/goos/zgoos_solaris.go

@@ -3,7 +3,7 @@
 //go:build !illumos && solaris
 // +build !illumos,solaris
 
-package sys
+package goos
 
 const GOOS = `solaris`
 

src/internal/goos/zgoos_windows.go

@@ -3,7 +3,7 @@
 //go:build windows
 // +build windows
 
-package sys
+package goos
 
 const GOOS = `windows`
 

src/internal/goos/zgoos_zos.go

@@ -3,7 +3,7 @@
 //go:build zos
 // +build zos
 
-package sys
+package goos
 
 const GOOS = `zos`
 

src/runtime/internal/sys/consts.go

@@ -0,0 +1,109 @@
+// 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.
+
+package sys
+
+import (
+	"internal/goarch"
+	"internal/goos"
+)
+
+type ArchFamilyType = goarch.ArchFamilyType
+
+const (
+	AMD64   = goarch.AMD64
+	ARM     = goarch.ARM
+	ARM64   = goarch.ARM64
+	I386    = goarch.I386
+	MIPS    = goarch.MIPS
+	MIPS64  = goarch.MIPS64
+	PPC64   = goarch.PPC64
+	RISCV64 = goarch.RISCV64
+	S390X   = goarch.S390X
+	WASM    = goarch.WASM
+)
+
+// PtrSize is the size of a pointer in bytes - unsafe.Sizeof(uintptr(0)) but as an ideal constant.
+// It is also the size of the machine's native word size (that is, 4 on 32-bit systems, 8 on 64-bit).
+const PtrSize = goarch.PtrSize
+
+// ArchFamily is the architecture family (AMD64, ARM, ...)
+const ArchFamily ArchFamilyType = goarch.ArchFamily
+
+// AIX requires a larger stack for syscalls.
+const StackGuardMultiplier = StackGuardMultiplierDefault*(1-goos.GoosAix) + 2*goos.GoosAix
+
+// BigEndian reports whether the architecture is big-endian.
+const BigEndian = goarch.BigEndian
+
+// DefaultPhysPageSize is the default physical page size.
+const DefaultPhysPageSize = goarch.DefaultPhysPageSize
+
+// PCQuantum is the minimal unit for a program counter (1 on x86, 4 on most other systems).
+// The various PC tables record PC deltas pre-divided by PCQuantum.
+const PCQuantum = goarch.PCQuantum
+
+// Int64Align is the required alignment for a 64-bit integer (4 on 32-bit systems, 8 on 64-bit).
+const Int64Align = goarch.PtrSize
+
+// MinFrameSize is the size of the system-reserved words at the bottom
+// of a frame (just above the architectural stack pointer).
+// It is zero on x86 and PtrSize on most non-x86 (LR-based) systems.
+// On PowerPC it is larger, to cover three more reserved words:
+// the compiler word, the link editor word, and the TOC save word.
+const MinFrameSize = goarch.MinFrameSize
+
+// StackAlign is the required alignment of the SP register.
+// The stack must be at least word aligned, but some architectures require more.
+const StackAlign = goarch.StackAlign
+
+const GOARCH = goarch.GOARCH
+
+const (
+	Goarch386         = goarch.Goarch386
+	GoarchAmd64       = goarch.GoarchAmd64
+	GoarchAmd64p32    = goarch.GoarchAmd64p32
+	GoarchArm         = goarch.GoarchArm
+	GoarchArmbe       = goarch.GoarchArmbe
+	GoarchArm64       = goarch.GoarchArm64
+	GoarchArm64be     = goarch.GoarchArm64be
+	GoarchPpc64       = goarch.GoarchPpc64
+	GoarchPpc64le     = goarch.GoarchPpc64le
+	GoarchMips        = goarch.GoarchMips
+	GoarchMipsle      = goarch.GoarchMipsle
+	GoarchMips64      = goarch.GoarchMips64
+	GoarchMips64le    = goarch.GoarchMips64le
+	GoarchMips64p32   = goarch.GoarchMips64p32
+	GoarchMips64p32le = goarch.GoarchMips64p32le
+	GoarchPpc         = goarch.GoarchPpc
+	GoarchRiscv       = goarch.GoarchRiscv
+	GoarchRiscv64     = goarch.GoarchRiscv64
+	GoarchS390        = goarch.GoarchS390
+	GoarchS390x       = goarch.GoarchS390x
+	GoarchSparc       = goarch.GoarchSparc
+	GoarchSparc64     = goarch.GoarchSparc64
+	GoarchWasm        = goarch.GoarchWasm
+)
+
+const GOOS = goos.GOOS
+
+const (
+	GoosAix       = goos.GoosAix
+	GoosAndroid   = goos.GoosAndroid
+	GoosDarwin    = goos.GoosDarwin
+	GoosDragonfly = goos.GoosDragonfly
+	GoosFreebsd   = goos.GoosFreebsd
+	GoosHurd      = goos.GoosHurd
+	GoosIllumos   = goos.GoosIllumos
+	GoosIos       = goos.GoosIos
+	GoosJs        = goos.GoosJs
+	GoosLinux     = goos.GoosLinux
+	GoosNacl      = goos.GoosNacl
+	GoosNetbsd    = goos.GoosNetbsd
+	GoosOpenbsd   = goos.GoosOpenbsd
+	GoosPlan9     = goos.GoosPlan9
+	GoosSolaris   = goos.GoosSolaris
+	GoosWindows   = goos.GoosWindows
+	GoosZos       = goos.GoosZos
+)

src/runtime/internal/sys/sys.go

@@ -5,11 +5,3 @@
 // package sys contains system- and configuration- and architecture-specific
 // constants used by the runtime.
 package sys
-
-// The next line makes 'go generate' write the zgo*.go files with
-// per-OS and per-arch information, including constants
-// named Goos$GOOS and Goarch$GOARCH for every
-// known GOOS and GOARCH. The constant is 1 on the
-// current system, 0 otherwise; multiplying by them is
-// useful for defining GOOS- or GOARCH-specific constants.
-//go:generate go run gengoos.go