From 47f433cd9fd61777663ce88eb47d57b0600e5736 Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Fri, 12 Aug 2022 16:38:41 +0800
Subject: [PATCH 1/6] feat:add new target to support wasm unknow

---
 src/os/dir_other.go                      |  4 +-
 src/os/dir_unix.go                       |  4 +-
 src/os/dirent_linux.go                   |  4 +-
 src/os/env_unix_test.go                  |  4 +-
 src/os/exec_posix.go                     |  4 +-
 src/os/executable_other.go               |  4 +-
 src/os/executable_procfs.go              |  4 +-
 src/os/file_anyos.go                     |  4 +-
 src/os/file_anyos_test.go                |  4 +-
 src/os/file_other.go                     |  4 +-
 src/os/file_unix.go                      |  4 +-
 src/os/getpagesize_test.go               |  4 +-
 src/os/os_anyos_test.go                  |  4 +-
 src/os/os_chmod_test.go                  |  4 +-
 src/os/os_symlink_test.go                |  4 +-
 src/os/pipe_test.go                      |  4 +-
 src/os/read_test.go                      |  4 +-
 src/os/removeall_noat.go                 |  4 +-
 src/os/removeall_other.go                |  4 +-
 src/os/removeall_test.go                 |  4 +-
 src/os/seek_unix_bad.go                  |  4 +-
 src/os/stat_linux.go                     |  4 +-
 src/os/stat_other.go                     |  4 +-
 src/os/stat_unix.go                      |  4 +-
 src/os/tempfile.go                       |  3 +
 src/os/tempfile_test.go                  |  4 +-
 src/os/types_anyos.go                    |  4 +-
 src/os/types_unix.go                     |  4 +-
 src/runtime/os_linux.go                  |  4 +-
 src/runtime/os_other.go                  |  4 +-
 src/runtime/runtime_tinygowasm.go        |  4 +-
 src/runtime/runtime_unix.go              |  4 +-
 src/runtime/runtime_wasm_js.go           |  4 +-
 src/runtime/runtime_wasm_js_scheduler.go |  4 +-
 src/runtime/runtime_wasm_unknow.go       | 78 ++++++++++++++++++++++++
 src/runtime/runtime_wasm_wasi.go         |  4 +-
 src/syscall/file_emulated.go             |  4 +-
 src/syscall/file_hosted.go               |  4 +-
 src/syscall/proc_emulated.go             |  4 +-
 src/syscall/proc_hosted.go               |  4 +-
 src/syscall/syscall_nonhosted.go         |  4 +-
 src/syscall/tables_nonhosted.go          |  4 +-
 targets/unknow_wasm.json                 | 24 ++++++++
 43 files changed, 185 insertions(+), 80 deletions(-)
 create mode 100644 src/runtime/runtime_wasm_unknow.go
 create mode 100644 targets/unknow_wasm.json

diff --git a/src/os/dir_other.go b/src/os/dir_other.go
index aebeed4e45..9a5d43454f 100644
--- a/src/os/dir_other.go
+++ b/src/os/dir_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || wasi || windows
-// +build baremetal js wasi windows
+//go:build baremetal || js || wasi || windows || unknow_wasm
+// +build baremetal js wasi windows unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/dir_unix.go b/src/os/dir_unix.go
index 659b612bbd..8dd34702f2 100644
--- a/src/os/dir_unix.go
+++ b/src/os/dir_unix.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.
 
-//go:build linux && !baremetal && !wasi
-// +build linux,!baremetal,!wasi
+//go:build linux && !baremetal && !wasi && !unknow_wasm
+// +build linux,!baremetal,!wasi,!unknow_wasm
 
 package os
 
diff --git a/src/os/dirent_linux.go b/src/os/dirent_linux.go
index c249f615a3..0fb15bb1c2 100644
--- a/src/os/dirent_linux.go
+++ b/src/os/dirent_linux.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi
-// +build !baremetal,!js,!wasi
+//go:build !baremetal && !js && !wasi && !unknow_wasm
+// +build !baremetal,!js,!wasi,!unknow_wasm
 
 // Copyright 2020 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/env_unix_test.go b/src/os/env_unix_test.go
index d567acf1ee..9b34697294 100644
--- a/src/os/env_unix_test.go
+++ b/src/os/env_unix_test.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.
 
-//go:build darwin || linux
-// +build darwin linux
+//go:build darwin || (linux && !unknow_wasm)
+// +build darwin linux,!unknow_wasm
 
 package os_test
 
diff --git a/src/os/exec_posix.go b/src/os/exec_posix.go
index f100d63174..59b55a2ed7 100644
--- a/src/os/exec_posix.go
+++ b/src/os/exec_posix.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.
 
-//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || linux || netbsd || openbsd || solaris || windows
-// +build aix darwin dragonfly freebsd js,wasm linux netbsd openbsd solaris windows
+//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || (linux && !unknow_wasm) || netbsd || openbsd || solaris || windows
+// +build aix darwin dragonfly freebsd js,wasm linux,!unknow_wasm netbsd openbsd solaris windows
 
 package os
 
diff --git a/src/os/executable_other.go b/src/os/executable_other.go
index 4bf1f04236..b7da1ee382 100644
--- a/src/os/executable_other.go
+++ b/src/os/executable_other.go
@@ -1,5 +1,5 @@
-//go:build !linux || baremetal
-// +build !linux baremetal
+//go:build !linux || baremetal || unknow_wasm
+// +build !linux baremetal unknow_wasm
 
 package os
 
diff --git a/src/os/executable_procfs.go b/src/os/executable_procfs.go
index cabe3744f2..6da291d107 100644
--- a/src/os/executable_procfs.go
+++ b/src/os/executable_procfs.go
@@ -4,8 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build linux && !baremetal
-// +build linux,!baremetal
+//go:build linux && !baremetal && !unknow_wasm
+// +build linux,!baremetal,!unknow_wasm
 
 package os
 
diff --git a/src/os/file_anyos.go b/src/os/file_anyos.go
index 117f173f6f..4b9fbb3143 100644
--- a/src/os/file_anyos.go
+++ b/src/os/file_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js
-// +build !baremetal,!js
+//go:build !baremetal && !js && !unknow_wasm
+// +build !baremetal,!js,!unknow_wasm
 
 // Portions copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/file_anyos_test.go b/src/os/file_anyos_test.go
index 25fcfd2817..1d3bb270c8 100644
--- a/src/os/file_anyos_test.go
+++ b/src/os/file_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js
-// +build !baremetal,!js
+//go:build !baremetal && !js && !unknow_wasm
+// +build !baremetal,!js,!unknow_wasm
 
 package os_test
 
diff --git a/src/os/file_other.go b/src/os/file_other.go
index 82c84e9581..73464dde05 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || (wasm && !wasi)
-// +build baremetal wasm,!wasi
+//go:build baremetal || unknow_wasm || (wasm && !wasi)
+// +build baremetal unknow_wasm wasm,!wasi
 
 package os
 
diff --git a/src/os/file_unix.go b/src/os/file_unix.go
index a76f5ff132..017d2f37eb 100644
--- a/src/os/file_unix.go
+++ b/src/os/file_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal)
-// +build darwin linux,!baremetal
+//go:build darwin || (linux && !baremetal && !unknow_wasm)
+// +build darwin linux,!baremetal,!unknow_wasm
 
 // target wasi sets GOOS=linux and thus the +linux build tag,
 // even though it doesn't show up in "tinygo info target -wasi"
diff --git a/src/os/getpagesize_test.go b/src/os/getpagesize_test.go
index bcba9643f8..0a9959f89d 100644
--- a/src/os/getpagesize_test.go
+++ b/src/os/getpagesize_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal)
-// +build windows darwin linux,!baremetal
+//go:build windows || darwin || (linux && !baremetal && !unknow_wasm)
+// +build windows darwin linux,!baremetal,!unknow_wasm
 
 package os_test
 
diff --git a/src/os/os_anyos_test.go b/src/os/os_anyos_test.go
index dd255fb466..8743a05fbf 100644
--- a/src/os/os_anyos_test.go
+++ b/src/os/os_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal)
-// +build windows darwin linux,!baremetal
+//go:build windows || darwin || (linux && !baremetal && !unknow_wasm)
+// +build windows darwin linux,!baremetal,!unknow_wasm
 
 package os_test
 
diff --git a/src/os/os_chmod_test.go b/src/os/os_chmod_test.go
index 01ec7f662c..679638250a 100644
--- a/src/os/os_chmod_test.go
+++ b/src/os/os_chmod_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi
-// +build !baremetal,!js,!wasi
+//go:build !baremetal && !js && !wasi && !unknow_wasm
+// +build !baremetal,!js,!wasi,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/os_symlink_test.go b/src/os/os_symlink_test.go
index dd97479715..7f4bacd6f9 100644
--- a/src/os/os_symlink_test.go
+++ b/src/os/os_symlink_test.go
@@ -1,5 +1,5 @@
-//go:build !windows && !baremetal && !js && !wasi
-// +build !windows,!baremetal,!js,!wasi
+//go:build !windows && !baremetal && !js && !wasi && !unknow_wasm
+// +build !windows,!baremetal,!js,!wasi,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/pipe_test.go b/src/os/pipe_test.go
index dcb9952846..5e6e05cee5 100644
--- a/src/os/pipe_test.go
+++ b/src/os/pipe_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !wasi)
-// +build windows darwin linux,!baremetal,!wasi
+//go:build windows || darwin || (linux && !baremetal && !wasi && !unknow_wasm)
+// +build windows darwin linux,!baremetal,!wasi,!unknow_wasm
 
 // Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/read_test.go b/src/os/read_test.go
index 0051f97636..36061bb17a 100644
--- a/src/os/read_test.go
+++ b/src/os/read_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi
-// +build !baremetal,!js,!wasi
+//go:build !baremetal && !js && !wasi && !unknow_wasm
+// +build !baremetal,!js,!wasi,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_noat.go b/src/os/removeall_noat.go
index 8b41282be9..4c746a3fd2 100644
--- a/src/os/removeall_noat.go
+++ b/src/os/removeall_noat.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.
 
-//go:build !baremetal && !js && !wasi
-// +build !baremetal,!js,!wasi
+//go:build !baremetal && !js && !wasi && !unknow_wasm
+// +build !baremetal,!js,!wasi,!unknow_wasm
 
 package os
 
diff --git a/src/os/removeall_other.go b/src/os/removeall_other.go
index 41cb0f5444..cf20e83565 100644
--- a/src/os/removeall_other.go
+++ b/src/os/removeall_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || wasi
-// +build baremetal js wasi
+//go:build baremetal || unknow_wasm || js || wasi
+// +build baremetal unknow_wasm js wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_test.go b/src/os/removeall_test.go
index 81e7f58f2b..e985f96bf0 100644
--- a/src/os/removeall_test.go
+++ b/src/os/removeall_test.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !js && !wasi)
-// +build darwin linux,!baremetal,!js,!wasi
+//go:build darwin || (linux && !baremetal && !js && !wasi && !unknow_wasm)
+// +build darwin linux,!baremetal,!js,!wasi,!unknow_wasm
 
 // TODO: implement ReadDir on windows
 
diff --git a/src/os/seek_unix_bad.go b/src/os/seek_unix_bad.go
index 13f1d98c20..f5d9b7d630 100644
--- a/src/os/seek_unix_bad.go
+++ b/src/os/seek_unix_bad.go
@@ -1,5 +1,5 @@
-//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi)
-// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi
+//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi && !unknow_wasm)
+// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi,!unknow_wasm
 
 package os
 
diff --git a/src/os/stat_linux.go b/src/os/stat_linux.go
index d186926abd..0d981834e0 100644
--- a/src/os/stat_linux.go
+++ b/src/os/stat_linux.go
@@ -1,5 +1,5 @@
-//go:build linux && !baremetal
-// +build linux,!baremetal
+//go:build linux && !baremetal && !unknow_wasm
+// +build linux,!baremetal,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/stat_other.go b/src/os/stat_other.go
index 5b574abbae..29fb5905bd 100644
--- a/src/os/stat_other.go
+++ b/src/os/stat_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || (wasm && !wasi)
-// +build baremetal wasm,!wasi
+//go:build baremetal || unknow_wasm || (wasm && !wasi)
+// +build baremetal unknow_wasm wasm,!wasi
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/stat_unix.go b/src/os/stat_unix.go
index 68f0168b74..b2e80dd2ce 100644
--- a/src/os/stat_unix.go
+++ b/src/os/stat_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal)
-// +build darwin linux,!baremetal
+//go:build darwin || (linux && !baremetal && !unknow_wasm)
+// +build darwin linux,!baremetal,!unknow_wasm
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/tempfile.go b/src/os/tempfile.go
index 383d4c1815..16fcada004 100644
--- a/src/os/tempfile.go
+++ b/src/os/tempfile.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !unknow_wasm
+// +build !unknow_wasm
+
 package os
 
 import (
diff --git a/src/os/tempfile_test.go b/src/os/tempfile_test.go
index 7c3e706e35..240b0db8e7 100644
--- a/src/os/tempfile_test.go
+++ b/src/os/tempfile_test.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.
 
-//go:build !baremetal && !js && !wasi
-// +build !baremetal,!js,!wasi
+//go:build !baremetal && !js && !wasi && !unknow_wasm
+// +build !baremetal,!js,!wasi,!unknow_wasm
 
 package os_test
 
diff --git a/src/os/types_anyos.go b/src/os/types_anyos.go
index e8013cb4f7..c2fd21efc7 100644
--- a/src/os/types_anyos.go
+++ b/src/os/types_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js
-// +build !baremetal,!js
+//go:build !baremetal && !js && !unknow_wasm
+// +build !baremetal,!js,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/types_unix.go b/src/os/types_unix.go
index 095fabda73..857b32cd01 100644
--- a/src/os/types_unix.go
+++ b/src/os/types_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal)
-// +build darwin linux,!baremetal
+//go:build darwin || (linux && !baremetal && !unknow_wasm)
+// +build darwin linux,!baremetal,!unknow_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go
index 8f15726587..50ddaa3bbc 100644
--- a/src/runtime/os_linux.go
+++ b/src/runtime/os_linux.go
@@ -1,5 +1,5 @@
-//go:build linux && !baremetal && !nintendoswitch && !wasi
-// +build linux,!baremetal,!nintendoswitch,!wasi
+//go:build linux && !baremetal && !nintendoswitch && !wasi && !unknow_wasm
+// +build linux,!baremetal,!nintendoswitch,!wasi,!unknow_wasm
 
 package runtime
 
diff --git a/src/runtime/os_other.go b/src/runtime/os_other.go
index 93773e536f..b71fc63e98 100644
--- a/src/runtime/os_other.go
+++ b/src/runtime/os_other.go
@@ -1,6 +1,6 @@
-//go:build linux && (baremetal || nintendoswitch || wasi)
+//go:build linux && (baremetal || nintendoswitch || wasi || unknow_wasm)
 // +build linux
-// +build baremetal nintendoswitch wasi
+// +build baremetal nintendoswitch wasi unknow_wasm
 
 // Other systems that aren't operating systems supported by the Go toolchain
 // need to pretend to be an existing operating system. Linux seems like a good
diff --git a/src/runtime/runtime_tinygowasm.go b/src/runtime/runtime_tinygowasm.go
index 73a9eddf9b..b854e5cf63 100644
--- a/src/runtime/runtime_tinygowasm.go
+++ b/src/runtime/runtime_tinygowasm.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm
-// +build tinygo.wasm
+//go:build tinygo.wasm && !unknow_wasm
+// +build tinygo.wasm,!unknow_wasm
 
 package runtime
 
diff --git a/src/runtime/runtime_unix.go b/src/runtime/runtime_unix.go
index 604f21c6d2..1506a06e54 100644
--- a/src/runtime/runtime_unix.go
+++ b/src/runtime/runtime_unix.go
@@ -1,5 +1,5 @@
-//go:build (darwin || (linux && !baremetal && !wasi)) && !nintendoswitch
-// +build darwin linux,!baremetal,!wasi
+//go:build (darwin || (linux && !baremetal && !wasi && !unknow_wasm)) && !nintendoswitch
+// +build darwin linux,!baremetal,!wasi,!unknow_wasm
 // +build !nintendoswitch
 
 package runtime
diff --git a/src/runtime/runtime_wasm_js.go b/src/runtime/runtime_wasm_js.go
index ecc9d73d39..58e61f5516 100644
--- a/src/runtime/runtime_wasm_js.go
+++ b/src/runtime/runtime_wasm_js.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi
-// +build wasm,!wasi
+//go:build wasm && !wasi && !unknow_wasm
+// +build wasm,!wasi,!unknow_wasm
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_js_scheduler.go b/src/runtime/runtime_wasm_js_scheduler.go
index ab80cf1d30..b2a0658757 100644
--- a/src/runtime/runtime_wasm_js_scheduler.go
+++ b/src/runtime/runtime_wasm_js_scheduler.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi && !scheduler.none
-// +build wasm,!wasi,!scheduler.none
+//go:build wasm && !wasi && !unknow_wasm && !scheduler.none
+// +build wasm,!wasi,!unknow_wasm,!scheduler.none
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_unknow.go b/src/runtime/runtime_wasm_unknow.go
new file mode 100644
index 0000000000..2eb1eb927c
--- /dev/null
+++ b/src/runtime/runtime_wasm_unknow.go
@@ -0,0 +1,78 @@
+//go:build unknow_wasm
+// +build unknow_wasm
+
+package runtime
+
+import (
+	"unsafe"
+)
+
+//export _start
+func _start() {
+	// These need to be initialized early so that the heap can be initialized.
+	heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
+	heapEnd = uintptr(wasm_memory_size(0) * wasmPageSize)
+	run()
+}
+
+// Abort executes the wasm 'unreachable' instruction.
+func abort() {
+	trap()
+}
+
+//go:linkname os_runtime_args os.runtime_args
+func os_runtime_args() []string {
+	return []string{}
+}
+
+//go:linkname syscall_runtime_envs syscall.runtime_envs
+func syscall_runtime_envs() []string {
+	return []string{}
+}
+
+func putchar(c byte) {
+}
+
+func getchar() byte {
+	return 0
+}
+
+func buffered() int {
+	return 0
+}
+
+type timeUnit int64
+
+func ticksToNanoseconds(ticks timeUnit) int64 {
+	panic("unimplemented: ticksToNanoseconds")
+}
+
+func nanosecondsToTicks(ns int64) timeUnit {
+	panic("unimplemented: nanosecondsToTicks")
+}
+
+func sleepTicks(d timeUnit) {
+	panic("unimplemented: sleepTicks")
+}
+
+func ticks() timeUnit {
+	panic("unimplemented: ticks")
+}
+
+//go:linkname now time.now
+func now() (int64, int32, int64) {
+	panic("unimplemented: now")
+}
+
+//go:linkname syscall_Exit syscall.Exit
+func syscall_Exit(code int) {
+	return
+}
+
+//go:linkname procPin sync/atomic.runtime_procPin
+func procPin() {
+}
+
+//go:linkname procUnpin sync/atomic.runtime_procUnpin
+func procUnpin() {
+}
diff --git a/src/runtime/runtime_wasm_wasi.go b/src/runtime/runtime_wasm_wasi.go
index 52fd79d61a..ebe42c925b 100644
--- a/src/runtime/runtime_wasm_wasi.go
+++ b/src/runtime/runtime_wasm_wasi.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm && wasi
-// +build tinygo.wasm,wasi
+//go:build tinygo.wasm && wasi && !unknow_wasm
+// +build tinygo.wasm,wasi,!unknow_wasm
 
 package runtime
 
diff --git a/src/syscall/file_emulated.go b/src/syscall/file_emulated.go
index b1859bb1bf..e91b00abd5 100644
--- a/src/syscall/file_emulated.go
+++ b/src/syscall/file_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasm
-// +build baremetal wasm
+//go:build baremetal || wasm || unknow_wasm
+// +build baremetal wasm unknow_wasm
 
 // This file emulates some file-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/file_hosted.go b/src/syscall/file_hosted.go
index 86fc62c408..c6415aa752 100644
--- a/src/syscall/file_hosted.go
+++ b/src/syscall/file_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasm
-// +build !baremetal,!wasm
+//go:build !baremetal && !wasm && !unknow_wasm
+// +build !baremetal,!wasm,!unknow_wasm
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/proc_emulated.go b/src/syscall/proc_emulated.go
index 4ed0b44c10..28e0d55fc8 100644
--- a/src/syscall/proc_emulated.go
+++ b/src/syscall/proc_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasi || wasm
-// +build baremetal wasi wasm
+//go:build baremetal || wasi || wasm || unknow_wasm
+// +build baremetal wasi wasm unknow_wasm
 
 // This file emulates some process-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/proc_hosted.go b/src/syscall/proc_hosted.go
index dd7c289ca6..04cedc3f9d 100644
--- a/src/syscall/proc_hosted.go
+++ b/src/syscall/proc_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasi && !wasm
-// +build !baremetal,!wasi,!wasm
+//go:build !baremetal && !wasi && !wasm && !unknow_wasm
+// +build !baremetal,!wasi,!wasm,!unknow_wasm
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/syscall_nonhosted.go b/src/syscall/syscall_nonhosted.go
index 399e97428b..a02da50fc6 100644
--- a/src/syscall/syscall_nonhosted.go
+++ b/src/syscall/syscall_nonhosted.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js
-// +build baremetal js
+//go:build baremetal || js || unknow_wasm
+// +build baremetal js unknow_wasm
 
 package syscall
 
diff --git a/src/syscall/tables_nonhosted.go b/src/syscall/tables_nonhosted.go
index ae0c7cc573..b47412f49d 100644
--- a/src/syscall/tables_nonhosted.go
+++ b/src/syscall/tables_nonhosted.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.
 
-//go:build baremetal || nintendoswitch || js
-// +build baremetal nintendoswitch js
+//go:build baremetal || nintendoswitch || js || unknow_wasm
+// +build baremetal nintendoswitch js unknow_wasm
 
 package syscall
 
diff --git a/targets/unknow_wasm.json b/targets/unknow_wasm.json
new file mode 100644
index 0000000000..3e7997229f
--- /dev/null
+++ b/targets/unknow_wasm.json
@@ -0,0 +1,24 @@
+{
+	"llvm-target":   "wasm32-unknown-unknown",
+	"cpu":           "generic",
+	"features":      "+bulk-memory,+nontrapping-fptoint,+sign-ext",
+	"build-tags":    ["tinygo.wasm", "unknow_wasm", "runtime_memhash_leveldb"],
+	"goos":          "linux",
+	"goarch":        "arm",
+	"linker":        "wasm-ld",
+	"libc":          "",
+	"scheduler":     "asyncify",
+	"default-stack-size": 16384,
+	"cflags": [
+		"-mbulk-memory",
+		"-mnontrapping-fptoint",
+		"-msign-ext"
+	],
+	"ldflags": [
+		"--allow-undefined",
+		"--stack-first",
+		"--no-demangle"
+	],
+	"emulator":      "wasmtime {}",
+	"wasm-abi":      "generic"
+}

From b69430c6e6850e96aca07aa47b15d62d86fc4a58 Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Mon, 22 Aug 2022 11:26:09 +0800
Subject: [PATCH 2/6] rename unknow to unknown

---
 src/os/dir_other.go                                           | 4 ++--
 src/os/dir_unix.go                                            | 4 ++--
 src/os/dirent_linux.go                                        | 4 ++--
 src/os/env_unix_test.go                                       | 4 ++--
 src/os/exec_posix.go                                          | 4 ++--
 src/os/executable_other.go                                    | 4 ++--
 src/os/executable_procfs.go                                   | 4 ++--
 src/os/file_anyos.go                                          | 4 ++--
 src/os/file_anyos_test.go                                     | 4 ++--
 src/os/file_other.go                                          | 4 ++--
 src/os/file_unix.go                                           | 4 ++--
 src/os/getpagesize_test.go                                    | 4 ++--
 src/os/os_anyos_test.go                                       | 4 ++--
 src/os/os_chmod_test.go                                       | 4 ++--
 src/os/os_symlink_test.go                                     | 4 ++--
 src/os/pipe_test.go                                           | 4 ++--
 src/os/read_test.go                                           | 4 ++--
 src/os/removeall_noat.go                                      | 4 ++--
 src/os/removeall_other.go                                     | 4 ++--
 src/os/removeall_test.go                                      | 4 ++--
 src/os/seek_unix_bad.go                                       | 4 ++--
 src/os/stat_other.go                                          | 4 ++--
 src/os/stat_unix.go                                           | 4 ++--
 src/os/tempfile.go                                            | 4 ++--
 src/os/tempfile_test.go                                       | 4 ++--
 src/os/types_anyos.go                                         | 4 ++--
 src/os/types_unix.go                                          | 4 ++--
 src/runtime/os_linux.go                                       | 4 ++--
 src/runtime/os_other.go                                       | 4 ++--
 src/runtime/runtime_tinygowasm.go                             | 4 ++--
 src/runtime/runtime_unix.go                                   | 4 ++--
 src/runtime/runtime_wasm_js.go                                | 4 ++--
 src/runtime/runtime_wasm_js_scheduler.go                      | 4 ++--
 .../{runtime_wasm_unknow.go => runtime_wasm_unknown.go}       | 4 ++--
 src/runtime/runtime_wasm_wasi.go                              | 4 ++--
 src/syscall/file_emulated.go                                  | 4 ++--
 src/syscall/file_hosted.go                                    | 4 ++--
 src/syscall/proc_emulated.go                                  | 4 ++--
 src/syscall/proc_hosted.go                                    | 4 ++--
 src/syscall/syscall_nonhosted.go                              | 4 ++--
 src/syscall/tables_nonhosted.go                               | 4 ++--
 targets/{unknow_wasm.json => unknown_wasm.json}               | 2 +-
 42 files changed, 83 insertions(+), 83 deletions(-)
 rename src/runtime/{runtime_wasm_unknow.go => runtime_wasm_unknown.go} (96%)
 rename targets/{unknow_wasm.json => unknown_wasm.json} (87%)

diff --git a/src/os/dir_other.go b/src/os/dir_other.go
index 9a5d43454f..832bd897fe 100644
--- a/src/os/dir_other.go
+++ b/src/os/dir_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || wasi || windows || unknow_wasm
-// +build baremetal js wasi windows unknow_wasm
+//go:build baremetal || js || wasi || windows || unknown_wasm
+// +build baremetal js wasi windows unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/dir_unix.go b/src/os/dir_unix.go
index 8dd34702f2..91e6065fa3 100644
--- a/src/os/dir_unix.go
+++ b/src/os/dir_unix.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.
 
-//go:build linux && !baremetal && !wasi && !unknow_wasm
-// +build linux,!baremetal,!wasi,!unknow_wasm
+//go:build linux && !baremetal && !wasi && !unknown_wasm
+// +build linux,!baremetal,!wasi,!unknown_wasm
 
 package os
 
diff --git a/src/os/dirent_linux.go b/src/os/dirent_linux.go
index 0fb15bb1c2..bda4550364 100644
--- a/src/os/dirent_linux.go
+++ b/src/os/dirent_linux.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknow_wasm
-// +build !baremetal,!js,!wasi,!unknow_wasm
+//go:build !baremetal && !js && !wasi && !unknown_wasm
+// +build !baremetal,!js,!wasi,!unknown_wasm
 
 // Copyright 2020 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/env_unix_test.go b/src/os/env_unix_test.go
index 9b34697294..fff8dce2bc 100644
--- a/src/os/env_unix_test.go
+++ b/src/os/env_unix_test.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.
 
-//go:build darwin || (linux && !unknow_wasm)
-// +build darwin linux,!unknow_wasm
+//go:build darwin || (linux && !unknown_wasm)
+// +build darwin linux,!unknown_wasm
 
 package os_test
 
diff --git a/src/os/exec_posix.go b/src/os/exec_posix.go
index 59b55a2ed7..83f1b952aa 100644
--- a/src/os/exec_posix.go
+++ b/src/os/exec_posix.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.
 
-//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || (linux && !unknow_wasm) || netbsd || openbsd || solaris || windows
-// +build aix darwin dragonfly freebsd js,wasm linux,!unknow_wasm netbsd openbsd solaris windows
+//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || (linux && !unknown_wasm) || netbsd || openbsd || solaris || windows
+// +build aix darwin dragonfly freebsd js,wasm linux,!unknown_wasm netbsd openbsd solaris windows
 
 package os
 
diff --git a/src/os/executable_other.go b/src/os/executable_other.go
index b7da1ee382..2c509b788b 100644
--- a/src/os/executable_other.go
+++ b/src/os/executable_other.go
@@ -1,5 +1,5 @@
-//go:build !linux || baremetal || unknow_wasm
-// +build !linux baremetal unknow_wasm
+//go:build !linux || baremetal || unknown_wasm
+// +build !linux baremetal unknown_wasm
 
 package os
 
diff --git a/src/os/executable_procfs.go b/src/os/executable_procfs.go
index 6da291d107..82f9a39307 100644
--- a/src/os/executable_procfs.go
+++ b/src/os/executable_procfs.go
@@ -4,8 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build linux && !baremetal && !unknow_wasm
-// +build linux,!baremetal,!unknow_wasm
+//go:build linux && !baremetal && !unknown_wasm
+// +build linux,!baremetal,!unknown_wasm
 
 package os
 
diff --git a/src/os/file_anyos.go b/src/os/file_anyos.go
index 4b9fbb3143..968df7d7c3 100644
--- a/src/os/file_anyos.go
+++ b/src/os/file_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknow_wasm
-// +build !baremetal,!js,!unknow_wasm
+//go:build !baremetal && !js && !unknown_wasm
+// +build !baremetal,!js,!unknown_wasm
 
 // Portions copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/file_anyos_test.go b/src/os/file_anyos_test.go
index 1d3bb270c8..df95eeb722 100644
--- a/src/os/file_anyos_test.go
+++ b/src/os/file_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknow_wasm
-// +build !baremetal,!js,!unknow_wasm
+//go:build !baremetal && !js && !unknown_wasm
+// +build !baremetal,!js,!unknown_wasm
 
 package os_test
 
diff --git a/src/os/file_other.go b/src/os/file_other.go
index 73464dde05..0f822edf23 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknow_wasm || (wasm && !wasi)
-// +build baremetal unknow_wasm wasm,!wasi
+//go:build baremetal || unknown_wasm || (wasm && !wasi)
+// +build baremetal unknown_wasm wasm,!wasi
 
 package os
 
diff --git a/src/os/file_unix.go b/src/os/file_unix.go
index 017d2f37eb..df9c8914f3 100644
--- a/src/os/file_unix.go
+++ b/src/os/file_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknow_wasm)
-// +build darwin linux,!baremetal,!unknow_wasm
+//go:build darwin || (linux && !baremetal && !unknown_wasm)
+// +build darwin linux,!baremetal,!unknown_wasm
 
 // target wasi sets GOOS=linux and thus the +linux build tag,
 // even though it doesn't show up in "tinygo info target -wasi"
diff --git a/src/os/getpagesize_test.go b/src/os/getpagesize_test.go
index 0a9959f89d..e6b32b69eb 100644
--- a/src/os/getpagesize_test.go
+++ b/src/os/getpagesize_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !unknow_wasm)
-// +build windows darwin linux,!baremetal,!unknow_wasm
+//go:build windows || darwin || (linux && !baremetal && !unknown_wasm)
+// +build windows darwin linux,!baremetal,!unknown_wasm
 
 package os_test
 
diff --git a/src/os/os_anyos_test.go b/src/os/os_anyos_test.go
index 8743a05fbf..285ed2eb67 100644
--- a/src/os/os_anyos_test.go
+++ b/src/os/os_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !unknow_wasm)
-// +build windows darwin linux,!baremetal,!unknow_wasm
+//go:build windows || darwin || (linux && !baremetal && !unknown_wasm)
+// +build windows darwin linux,!baremetal,!unknown_wasm
 
 package os_test
 
diff --git a/src/os/os_chmod_test.go b/src/os/os_chmod_test.go
index 679638250a..abadac2938 100644
--- a/src/os/os_chmod_test.go
+++ b/src/os/os_chmod_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknow_wasm
-// +build !baremetal,!js,!wasi,!unknow_wasm
+//go:build !baremetal && !js && !wasi && !unknown_wasm
+// +build !baremetal,!js,!wasi,!unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/os_symlink_test.go b/src/os/os_symlink_test.go
index 7f4bacd6f9..931f3bb034 100644
--- a/src/os/os_symlink_test.go
+++ b/src/os/os_symlink_test.go
@@ -1,5 +1,5 @@
-//go:build !windows && !baremetal && !js && !wasi && !unknow_wasm
-// +build !windows,!baremetal,!js,!wasi,!unknow_wasm
+//go:build !windows && !baremetal && !js && !wasi && !unknown_wasm
+// +build !windows,!baremetal,!js,!wasi,!unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/pipe_test.go b/src/os/pipe_test.go
index 5e6e05cee5..f6b77ac4fe 100644
--- a/src/os/pipe_test.go
+++ b/src/os/pipe_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !wasi && !unknow_wasm)
-// +build windows darwin linux,!baremetal,!wasi,!unknow_wasm
+//go:build windows || darwin || (linux && !baremetal && !wasi && !unknown_wasm)
+// +build windows darwin linux,!baremetal,!wasi,!unknown_wasm
 
 // Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/read_test.go b/src/os/read_test.go
index 36061bb17a..68ea825949 100644
--- a/src/os/read_test.go
+++ b/src/os/read_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknow_wasm
-// +build !baremetal,!js,!wasi,!unknow_wasm
+//go:build !baremetal && !js && !wasi && !unknown_wasm
+// +build !baremetal,!js,!wasi,!unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_noat.go b/src/os/removeall_noat.go
index 4c746a3fd2..b687af1731 100644
--- a/src/os/removeall_noat.go
+++ b/src/os/removeall_noat.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.
 
-//go:build !baremetal && !js && !wasi && !unknow_wasm
-// +build !baremetal,!js,!wasi,!unknow_wasm
+//go:build !baremetal && !js && !wasi && !unknown_wasm
+// +build !baremetal,!js,!wasi,!unknown_wasm
 
 package os
 
diff --git a/src/os/removeall_other.go b/src/os/removeall_other.go
index cf20e83565..7f501308fb 100644
--- a/src/os/removeall_other.go
+++ b/src/os/removeall_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknow_wasm || js || wasi
-// +build baremetal unknow_wasm js wasi
+//go:build baremetal || unknown_wasm || js || wasi
+// +build baremetal unknown_wasm js wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_test.go b/src/os/removeall_test.go
index e985f96bf0..1e82c272b1 100644
--- a/src/os/removeall_test.go
+++ b/src/os/removeall_test.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !js && !wasi && !unknow_wasm)
-// +build darwin linux,!baremetal,!js,!wasi,!unknow_wasm
+//go:build darwin || (linux && !baremetal && !js && !wasi && !unknown_wasm)
+// +build darwin linux,!baremetal,!js,!wasi,!unknown_wasm
 
 // TODO: implement ReadDir on windows
 
diff --git a/src/os/seek_unix_bad.go b/src/os/seek_unix_bad.go
index f5d9b7d630..f863a27974 100644
--- a/src/os/seek_unix_bad.go
+++ b/src/os/seek_unix_bad.go
@@ -1,5 +1,5 @@
-//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi && !unknow_wasm)
-// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi,!unknow_wasm
+//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi && !unknown_wasm)
+// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi,!unknown_wasm
 
 package os
 
diff --git a/src/os/stat_other.go b/src/os/stat_other.go
index 29fb5905bd..d4e13f837d 100644
--- a/src/os/stat_other.go
+++ b/src/os/stat_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknow_wasm || (wasm && !wasi)
-// +build baremetal unknow_wasm wasm,!wasi
+//go:build baremetal || unknown_wasm || (wasm && !wasi)
+// +build baremetal unknown_wasm wasm,!wasi
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/stat_unix.go b/src/os/stat_unix.go
index b2e80dd2ce..3e90ddd122 100644
--- a/src/os/stat_unix.go
+++ b/src/os/stat_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknow_wasm)
-// +build darwin linux,!baremetal,!unknow_wasm
+//go:build darwin || (linux && !baremetal && !unknown_wasm)
+// +build darwin linux,!baremetal,!unknown_wasm
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/tempfile.go b/src/os/tempfile.go
index 16fcada004..f744f0273d 100644
--- a/src/os/tempfile.go
+++ b/src/os/tempfile.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.
 
-//go:build !unknow_wasm
-// +build !unknow_wasm
+//go:build !unknown_wasm
+// +build !unknown_wasm
 
 package os
 
diff --git a/src/os/tempfile_test.go b/src/os/tempfile_test.go
index 240b0db8e7..4d3eb2ce05 100644
--- a/src/os/tempfile_test.go
+++ b/src/os/tempfile_test.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.
 
-//go:build !baremetal && !js && !wasi && !unknow_wasm
-// +build !baremetal,!js,!wasi,!unknow_wasm
+//go:build !baremetal && !js && !wasi && !unknown_wasm
+// +build !baremetal,!js,!wasi,!unknown_wasm
 
 package os_test
 
diff --git a/src/os/types_anyos.go b/src/os/types_anyos.go
index c2fd21efc7..41fee8db12 100644
--- a/src/os/types_anyos.go
+++ b/src/os/types_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknow_wasm
-// +build !baremetal,!js,!unknow_wasm
+//go:build !baremetal && !js && !unknown_wasm
+// +build !baremetal,!js,!unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/types_unix.go b/src/os/types_unix.go
index 857b32cd01..50534a80bb 100644
--- a/src/os/types_unix.go
+++ b/src/os/types_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknow_wasm)
-// +build darwin linux,!baremetal,!unknow_wasm
+//go:build darwin || (linux && !baremetal && !unknown_wasm)
+// +build darwin linux,!baremetal,!unknown_wasm
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go
index 50ddaa3bbc..7c51f484a3 100644
--- a/src/runtime/os_linux.go
+++ b/src/runtime/os_linux.go
@@ -1,5 +1,5 @@
-//go:build linux && !baremetal && !nintendoswitch && !wasi && !unknow_wasm
-// +build linux,!baremetal,!nintendoswitch,!wasi,!unknow_wasm
+//go:build linux && !baremetal && !nintendoswitch && !wasi && !unknown_wasm
+// +build linux,!baremetal,!nintendoswitch,!wasi,!unknown_wasm
 
 package runtime
 
diff --git a/src/runtime/os_other.go b/src/runtime/os_other.go
index b71fc63e98..e0d375cb30 100644
--- a/src/runtime/os_other.go
+++ b/src/runtime/os_other.go
@@ -1,6 +1,6 @@
-//go:build linux && (baremetal || nintendoswitch || wasi || unknow_wasm)
+//go:build linux && (baremetal || nintendoswitch || wasi || unknown_wasm)
 // +build linux
-// +build baremetal nintendoswitch wasi unknow_wasm
+// +build baremetal nintendoswitch wasi unknown_wasm
 
 // Other systems that aren't operating systems supported by the Go toolchain
 // need to pretend to be an existing operating system. Linux seems like a good
diff --git a/src/runtime/runtime_tinygowasm.go b/src/runtime/runtime_tinygowasm.go
index b854e5cf63..da3305a943 100644
--- a/src/runtime/runtime_tinygowasm.go
+++ b/src/runtime/runtime_tinygowasm.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm && !unknow_wasm
-// +build tinygo.wasm,!unknow_wasm
+//go:build tinygo.wasm && !unknown_wasm
+// +build tinygo.wasm,!unknown_wasm
 
 package runtime
 
diff --git a/src/runtime/runtime_unix.go b/src/runtime/runtime_unix.go
index 1506a06e54..6063959e25 100644
--- a/src/runtime/runtime_unix.go
+++ b/src/runtime/runtime_unix.go
@@ -1,5 +1,5 @@
-//go:build (darwin || (linux && !baremetal && !wasi && !unknow_wasm)) && !nintendoswitch
-// +build darwin linux,!baremetal,!wasi,!unknow_wasm
+//go:build (darwin || (linux && !baremetal && !wasi && !unknown_wasm)) && !nintendoswitch
+// +build darwin linux,!baremetal,!wasi,!unknown_wasm
 // +build !nintendoswitch
 
 package runtime
diff --git a/src/runtime/runtime_wasm_js.go b/src/runtime/runtime_wasm_js.go
index 58e61f5516..1f7bf5a2b3 100644
--- a/src/runtime/runtime_wasm_js.go
+++ b/src/runtime/runtime_wasm_js.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi && !unknow_wasm
-// +build wasm,!wasi,!unknow_wasm
+//go:build wasm && !wasi && !unknown_wasm
+// +build wasm,!wasi,!unknown_wasm
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_js_scheduler.go b/src/runtime/runtime_wasm_js_scheduler.go
index b2a0658757..534f673bd2 100644
--- a/src/runtime/runtime_wasm_js_scheduler.go
+++ b/src/runtime/runtime_wasm_js_scheduler.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi && !unknow_wasm && !scheduler.none
-// +build wasm,!wasi,!unknow_wasm,!scheduler.none
+//go:build wasm && !wasi && !unknown_wasm && !scheduler.none
+// +build wasm,!wasi,!unknown_wasm,!scheduler.none
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_unknow.go b/src/runtime/runtime_wasm_unknown.go
similarity index 96%
rename from src/runtime/runtime_wasm_unknow.go
rename to src/runtime/runtime_wasm_unknown.go
index 2eb1eb927c..69d8a9a7f2 100644
--- a/src/runtime/runtime_wasm_unknow.go
+++ b/src/runtime/runtime_wasm_unknown.go
@@ -1,5 +1,5 @@
-//go:build unknow_wasm
-// +build unknow_wasm
+//go:build unknown_wasm
+// +build unknown_wasm
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_wasi.go b/src/runtime/runtime_wasm_wasi.go
index ebe42c925b..1ecae905fd 100644
--- a/src/runtime/runtime_wasm_wasi.go
+++ b/src/runtime/runtime_wasm_wasi.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm && wasi && !unknow_wasm
-// +build tinygo.wasm,wasi,!unknow_wasm
+//go:build tinygo.wasm && wasi && !unknown_wasm
+// +build tinygo.wasm,wasi,!unknown_wasm
 
 package runtime
 
diff --git a/src/syscall/file_emulated.go b/src/syscall/file_emulated.go
index e91b00abd5..3687e8dd57 100644
--- a/src/syscall/file_emulated.go
+++ b/src/syscall/file_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasm || unknow_wasm
-// +build baremetal wasm unknow_wasm
+//go:build baremetal || wasm || unknown_wasm
+// +build baremetal wasm unknown_wasm
 
 // This file emulates some file-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/file_hosted.go b/src/syscall/file_hosted.go
index c6415aa752..e980deb7bd 100644
--- a/src/syscall/file_hosted.go
+++ b/src/syscall/file_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasm && !unknow_wasm
-// +build !baremetal,!wasm,!unknow_wasm
+//go:build !baremetal && !wasm && !unknown_wasm
+// +build !baremetal,!wasm,!unknown_wasm
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/proc_emulated.go b/src/syscall/proc_emulated.go
index 28e0d55fc8..0176d337d0 100644
--- a/src/syscall/proc_emulated.go
+++ b/src/syscall/proc_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasi || wasm || unknow_wasm
-// +build baremetal wasi wasm unknow_wasm
+//go:build baremetal || wasi || wasm || unknown_wasm
+// +build baremetal wasi wasm unknown_wasm
 
 // This file emulates some process-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/proc_hosted.go b/src/syscall/proc_hosted.go
index 04cedc3f9d..4e386d039d 100644
--- a/src/syscall/proc_hosted.go
+++ b/src/syscall/proc_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasi && !wasm && !unknow_wasm
-// +build !baremetal,!wasi,!wasm,!unknow_wasm
+//go:build !baremetal && !wasi && !wasm && !unknown_wasm
+// +build !baremetal,!wasi,!wasm,!unknown_wasm
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/syscall_nonhosted.go b/src/syscall/syscall_nonhosted.go
index a02da50fc6..b35e122d4e 100644
--- a/src/syscall/syscall_nonhosted.go
+++ b/src/syscall/syscall_nonhosted.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || unknow_wasm
-// +build baremetal js unknow_wasm
+//go:build baremetal || js || unknown_wasm
+// +build baremetal js unknown_wasm
 
 package syscall
 
diff --git a/src/syscall/tables_nonhosted.go b/src/syscall/tables_nonhosted.go
index b47412f49d..1a7173144f 100644
--- a/src/syscall/tables_nonhosted.go
+++ b/src/syscall/tables_nonhosted.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.
 
-//go:build baremetal || nintendoswitch || js || unknow_wasm
-// +build baremetal nintendoswitch js unknow_wasm
+//go:build baremetal || nintendoswitch || js || unknown_wasm
+// +build baremetal nintendoswitch js unknown_wasm
 
 package syscall
 
diff --git a/targets/unknow_wasm.json b/targets/unknown_wasm.json
similarity index 87%
rename from targets/unknow_wasm.json
rename to targets/unknown_wasm.json
index 3e7997229f..a53cbf9901 100644
--- a/targets/unknow_wasm.json
+++ b/targets/unknown_wasm.json
@@ -2,7 +2,7 @@
 	"llvm-target":   "wasm32-unknown-unknown",
 	"cpu":           "generic",
 	"features":      "+bulk-memory,+nontrapping-fptoint,+sign-ext",
-	"build-tags":    ["tinygo.wasm", "unknow_wasm", "runtime_memhash_leveldb"],
+	"build-tags":    ["tinygo.wasm", "unknown_wasm", "runtime_memhash_leveldb"],
 	"goos":          "linux",
 	"goarch":        "arm",
 	"linker":        "wasm-ld",

From 6ebfdc16810c7dc01b6b1e8faabf1b7ee2d615c2 Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Mon, 29 Aug 2022 09:53:14 +0800
Subject: [PATCH 3/6] fix: change name to freestanding

---
 src/os/dir_other.go                                           | 4 ++--
 src/os/dir_unix.go                                            | 4 ++--
 src/os/dirent_linux.go                                        | 4 ++--
 src/os/env_unix_test.go                                       | 4 ++--
 src/os/exec_posix.go                                          | 4 ++--
 src/os/executable_other.go                                    | 4 ++--
 src/os/executable_procfs.go                                   | 4 ++--
 src/os/file_anyos.go                                          | 4 ++--
 src/os/file_anyos_test.go                                     | 4 ++--
 src/os/file_other.go                                          | 4 ++--
 src/os/file_unix.go                                           | 4 ++--
 src/os/getpagesize_test.go                                    | 4 ++--
 src/os/os_anyos_test.go                                       | 4 ++--
 src/os/os_chmod_test.go                                       | 4 ++--
 src/os/os_symlink_test.go                                     | 4 ++--
 src/os/pipe_test.go                                           | 4 ++--
 src/os/read_test.go                                           | 4 ++--
 src/os/removeall_noat.go                                      | 4 ++--
 src/os/removeall_other.go                                     | 4 ++--
 src/os/removeall_test.go                                      | 4 ++--
 src/os/seek_unix_bad.go                                       | 4 ++--
 src/os/stat_other.go                                          | 4 ++--
 src/os/stat_unix.go                                           | 4 ++--
 src/os/tempfile.go                                            | 4 ++--
 src/os/tempfile_test.go                                       | 4 ++--
 src/os/types_anyos.go                                         | 4 ++--
 src/os/types_unix.go                                          | 4 ++--
 src/runtime/os_linux.go                                       | 4 ++--
 src/runtime/os_other.go                                       | 4 ++--
 src/runtime/runtime_tinygowasm.go                             | 4 ++--
 src/runtime/runtime_unix.go                                   | 4 ++--
 .../{runtime_wasm_unknown.go => runtime_wasm_freestanding.go} | 4 ++--
 src/runtime/runtime_wasm_js.go                                | 4 ++--
 src/runtime/runtime_wasm_js_scheduler.go                      | 4 ++--
 src/runtime/runtime_wasm_wasi.go                              | 4 ++--
 src/syscall/file_emulated.go                                  | 4 ++--
 src/syscall/file_hosted.go                                    | 4 ++--
 src/syscall/proc_emulated.go                                  | 4 ++--
 src/syscall/proc_hosted.go                                    | 4 ++--
 src/syscall/syscall_nonhosted.go                              | 4 ++--
 src/syscall/tables_nonhosted.go                               | 4 ++--
 targets/{unknown_wasm.json => wasm-freestanding.json}         | 0
 42 files changed, 82 insertions(+), 82 deletions(-)
 rename src/runtime/{runtime_wasm_unknown.go => runtime_wasm_freestanding.go} (95%)
 rename targets/{unknown_wasm.json => wasm-freestanding.json} (100%)

diff --git a/src/os/dir_other.go b/src/os/dir_other.go
index 832bd897fe..b169bca467 100644
--- a/src/os/dir_other.go
+++ b/src/os/dir_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || wasi || windows || unknown_wasm
-// +build baremetal js wasi windows unknown_wasm
+//go:build baremetal || js || wasi || windows || wasm_freestanding
+// +build baremetal js wasi windows wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/dir_unix.go b/src/os/dir_unix.go
index 91e6065fa3..3ab5f73486 100644
--- a/src/os/dir_unix.go
+++ b/src/os/dir_unix.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.
 
-//go:build linux && !baremetal && !wasi && !unknown_wasm
-// +build linux,!baremetal,!wasi,!unknown_wasm
+//go:build linux && !baremetal && !wasi && !wasm_freestanding
+// +build linux,!baremetal,!wasi,!wasm_freestanding
 
 package os
 
diff --git a/src/os/dirent_linux.go b/src/os/dirent_linux.go
index bda4550364..355f92da2c 100644
--- a/src/os/dirent_linux.go
+++ b/src/os/dirent_linux.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknown_wasm
-// +build !baremetal,!js,!wasi,!unknown_wasm
+//go:build !baremetal && !js && !wasi && !wasm_freestanding
+// +build !baremetal,!js,!wasi,!wasm_freestanding
 
 // Copyright 2020 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/env_unix_test.go b/src/os/env_unix_test.go
index fff8dce2bc..8118a2c3da 100644
--- a/src/os/env_unix_test.go
+++ b/src/os/env_unix_test.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.
 
-//go:build darwin || (linux && !unknown_wasm)
-// +build darwin linux,!unknown_wasm
+//go:build darwin || (linux && !wasm_freestanding)
+// +build darwin linux,!wasm_freestanding
 
 package os_test
 
diff --git a/src/os/exec_posix.go b/src/os/exec_posix.go
index 83f1b952aa..cd64dc4ff0 100644
--- a/src/os/exec_posix.go
+++ b/src/os/exec_posix.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.
 
-//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || (linux && !unknown_wasm) || netbsd || openbsd || solaris || windows
-// +build aix darwin dragonfly freebsd js,wasm linux,!unknown_wasm netbsd openbsd solaris windows
+//go:build aix || darwin || dragonfly || freebsd || (js && wasm) || (linux && !wasm_freestanding) || netbsd || openbsd || solaris || windows
+// +build aix darwin dragonfly freebsd js,wasm linux,!wasm_freestanding netbsd openbsd solaris windows
 
 package os
 
diff --git a/src/os/executable_other.go b/src/os/executable_other.go
index 2c509b788b..97757d47db 100644
--- a/src/os/executable_other.go
+++ b/src/os/executable_other.go
@@ -1,5 +1,5 @@
-//go:build !linux || baremetal || unknown_wasm
-// +build !linux baremetal unknown_wasm
+//go:build !linux || baremetal || wasm_freestanding
+// +build !linux baremetal wasm_freestanding
 
 package os
 
diff --git a/src/os/executable_procfs.go b/src/os/executable_procfs.go
index 82f9a39307..47b15c5633 100644
--- a/src/os/executable_procfs.go
+++ b/src/os/executable_procfs.go
@@ -4,8 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build linux && !baremetal && !unknown_wasm
-// +build linux,!baremetal,!unknown_wasm
+//go:build linux && !baremetal && !wasm_freestanding
+// +build linux,!baremetal,!wasm_freestanding
 
 package os
 
diff --git a/src/os/file_anyos.go b/src/os/file_anyos.go
index 968df7d7c3..29077591c8 100644
--- a/src/os/file_anyos.go
+++ b/src/os/file_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknown_wasm
-// +build !baremetal,!js,!unknown_wasm
+//go:build !baremetal && !js && !wasm_freestanding
+// +build !baremetal,!js,!wasm_freestanding
 
 // Portions copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/file_anyos_test.go b/src/os/file_anyos_test.go
index df95eeb722..953f6f399e 100644
--- a/src/os/file_anyos_test.go
+++ b/src/os/file_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknown_wasm
-// +build !baremetal,!js,!unknown_wasm
+//go:build !baremetal && !js && !wasm_freestanding
+// +build !baremetal,!js,!wasm_freestanding
 
 package os_test
 
diff --git a/src/os/file_other.go b/src/os/file_other.go
index 0f822edf23..3c5318e5b0 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknown_wasm || (wasm && !wasi)
-// +build baremetal unknown_wasm wasm,!wasi
+//go:build baremetal || wasm_freestanding || (wasm && !wasi)
+// +build baremetal wasm_freestanding wasm,!wasi
 
 package os
 
diff --git a/src/os/file_unix.go b/src/os/file_unix.go
index df9c8914f3..441d627fdc 100644
--- a/src/os/file_unix.go
+++ b/src/os/file_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknown_wasm)
-// +build darwin linux,!baremetal,!unknown_wasm
+//go:build darwin || (linux && !baremetal && !wasm_freestanding)
+// +build darwin linux,!baremetal,!wasm_freestanding
 
 // target wasi sets GOOS=linux and thus the +linux build tag,
 // even though it doesn't show up in "tinygo info target -wasi"
diff --git a/src/os/getpagesize_test.go b/src/os/getpagesize_test.go
index e6b32b69eb..6f513c8794 100644
--- a/src/os/getpagesize_test.go
+++ b/src/os/getpagesize_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !unknown_wasm)
-// +build windows darwin linux,!baremetal,!unknown_wasm
+//go:build windows || darwin || (linux && !baremetal && !wasm_freestanding)
+// +build windows darwin linux,!baremetal,!wasm_freestanding
 
 package os_test
 
diff --git a/src/os/os_anyos_test.go b/src/os/os_anyos_test.go
index 285ed2eb67..653a96a9c0 100644
--- a/src/os/os_anyos_test.go
+++ b/src/os/os_anyos_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !unknown_wasm)
-// +build windows darwin linux,!baremetal,!unknown_wasm
+//go:build windows || darwin || (linux && !baremetal && !wasm_freestanding)
+// +build windows darwin linux,!baremetal,!wasm_freestanding
 
 package os_test
 
diff --git a/src/os/os_chmod_test.go b/src/os/os_chmod_test.go
index abadac2938..9163d10328 100644
--- a/src/os/os_chmod_test.go
+++ b/src/os/os_chmod_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknown_wasm
-// +build !baremetal,!js,!wasi,!unknown_wasm
+//go:build !baremetal && !js && !wasi && !wasm_freestanding
+// +build !baremetal,!js,!wasi,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/os_symlink_test.go b/src/os/os_symlink_test.go
index 931f3bb034..407f64a9da 100644
--- a/src/os/os_symlink_test.go
+++ b/src/os/os_symlink_test.go
@@ -1,5 +1,5 @@
-//go:build !windows && !baremetal && !js && !wasi && !unknown_wasm
-// +build !windows,!baremetal,!js,!wasi,!unknown_wasm
+//go:build !windows && !baremetal && !js && !wasi && !wasm_freestanding
+// +build !windows,!baremetal,!js,!wasi,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/pipe_test.go b/src/os/pipe_test.go
index f6b77ac4fe..0895b85f7a 100644
--- a/src/os/pipe_test.go
+++ b/src/os/pipe_test.go
@@ -1,5 +1,5 @@
-//go:build windows || darwin || (linux && !baremetal && !wasi && !unknown_wasm)
-// +build windows darwin linux,!baremetal,!wasi,!unknown_wasm
+//go:build windows || darwin || (linux && !baremetal && !wasi && !wasm_freestanding)
+// +build windows darwin linux,!baremetal,!wasi,!wasm_freestanding
 
 // Copyright 2021 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/read_test.go b/src/os/read_test.go
index 68ea825949..745b93559a 100644
--- a/src/os/read_test.go
+++ b/src/os/read_test.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !wasi && !unknown_wasm
-// +build !baremetal,!js,!wasi,!unknown_wasm
+//go:build !baremetal && !js && !wasi && !wasm_freestanding
+// +build !baremetal,!js,!wasi,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_noat.go b/src/os/removeall_noat.go
index b687af1731..7110dd3d16 100644
--- a/src/os/removeall_noat.go
+++ b/src/os/removeall_noat.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.
 
-//go:build !baremetal && !js && !wasi && !unknown_wasm
-// +build !baremetal,!js,!wasi,!unknown_wasm
+//go:build !baremetal && !js && !wasi && !wasm_freestanding
+// +build !baremetal,!js,!wasi,!wasm_freestanding
 
 package os
 
diff --git a/src/os/removeall_other.go b/src/os/removeall_other.go
index 7f501308fb..fc35a6cc94 100644
--- a/src/os/removeall_other.go
+++ b/src/os/removeall_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknown_wasm || js || wasi
-// +build baremetal unknown_wasm js wasi
+//go:build baremetal || wasm_freestanding || js || wasi
+// +build baremetal wasm_freestanding js wasi
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/removeall_test.go b/src/os/removeall_test.go
index 1e82c272b1..3dd2e642ef 100644
--- a/src/os/removeall_test.go
+++ b/src/os/removeall_test.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !js && !wasi && !unknown_wasm)
-// +build darwin linux,!baremetal,!js,!wasi,!unknown_wasm
+//go:build darwin || (linux && !baremetal && !js && !wasi && !wasm_freestanding)
+// +build darwin linux,!baremetal,!js,!wasi,!wasm_freestanding
 
 // TODO: implement ReadDir on windows
 
diff --git a/src/os/seek_unix_bad.go b/src/os/seek_unix_bad.go
index f863a27974..625fd55055 100644
--- a/src/os/seek_unix_bad.go
+++ b/src/os/seek_unix_bad.go
@@ -1,5 +1,5 @@
-//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi && !unknown_wasm)
-// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi,!unknown_wasm
+//go:build (linux && !baremetal && 386) || (linux && !baremetal && arm && !wasi && !wasm_freestanding)
+// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi,!wasm_freestanding
 
 package os
 
diff --git a/src/os/stat_other.go b/src/os/stat_other.go
index d4e13f837d..2aec486291 100644
--- a/src/os/stat_other.go
+++ b/src/os/stat_other.go
@@ -1,5 +1,5 @@
-//go:build baremetal || unknown_wasm || (wasm && !wasi)
-// +build baremetal unknown_wasm wasm,!wasi
+//go:build baremetal || wasm_freestanding || (wasm && !wasi)
+// +build baremetal wasm_freestanding wasm,!wasi
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/stat_unix.go b/src/os/stat_unix.go
index 3e90ddd122..9d3794ae83 100644
--- a/src/os/stat_unix.go
+++ b/src/os/stat_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknown_wasm)
-// +build darwin linux,!baremetal,!unknown_wasm
+//go:build darwin || (linux && !baremetal && !wasm_freestanding)
+// +build darwin linux,!baremetal,!wasm_freestanding
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/tempfile.go b/src/os/tempfile.go
index f744f0273d..6343cfb64a 100644
--- a/src/os/tempfile.go
+++ b/src/os/tempfile.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.
 
-//go:build !unknown_wasm
-// +build !unknown_wasm
+//go:build !wasm_freestanding
+// +build !wasm_freestanding
 
 package os
 
diff --git a/src/os/tempfile_test.go b/src/os/tempfile_test.go
index 4d3eb2ce05..cd200d9eec 100644
--- a/src/os/tempfile_test.go
+++ b/src/os/tempfile_test.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.
 
-//go:build !baremetal && !js && !wasi && !unknown_wasm
-// +build !baremetal,!js,!wasi,!unknown_wasm
+//go:build !baremetal && !js && !wasi && !wasm_freestanding
+// +build !baremetal,!js,!wasi,!wasm_freestanding
 
 package os_test
 
diff --git a/src/os/types_anyos.go b/src/os/types_anyos.go
index 41fee8db12..19f87d68af 100644
--- a/src/os/types_anyos.go
+++ b/src/os/types_anyos.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !js && !unknown_wasm
-// +build !baremetal,!js,!unknown_wasm
+//go:build !baremetal && !js && !wasm_freestanding
+// +build !baremetal,!js,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/os/types_unix.go b/src/os/types_unix.go
index 50534a80bb..050eb4358b 100644
--- a/src/os/types_unix.go
+++ b/src/os/types_unix.go
@@ -1,5 +1,5 @@
-//go:build darwin || (linux && !baremetal && !unknown_wasm)
-// +build darwin linux,!baremetal,!unknown_wasm
+//go:build darwin || (linux && !baremetal && !wasm_freestanding)
+// +build darwin linux,!baremetal,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go
index 7c51f484a3..ca0d8feed7 100644
--- a/src/runtime/os_linux.go
+++ b/src/runtime/os_linux.go
@@ -1,5 +1,5 @@
-//go:build linux && !baremetal && !nintendoswitch && !wasi && !unknown_wasm
-// +build linux,!baremetal,!nintendoswitch,!wasi,!unknown_wasm
+//go:build linux && !baremetal && !nintendoswitch && !wasi && !wasm_freestanding
+// +build linux,!baremetal,!nintendoswitch,!wasi,!wasm_freestanding
 
 package runtime
 
diff --git a/src/runtime/os_other.go b/src/runtime/os_other.go
index e0d375cb30..e1f7e5111d 100644
--- a/src/runtime/os_other.go
+++ b/src/runtime/os_other.go
@@ -1,6 +1,6 @@
-//go:build linux && (baremetal || nintendoswitch || wasi || unknown_wasm)
+//go:build linux && (baremetal || nintendoswitch || wasi || wasm_freestanding)
 // +build linux
-// +build baremetal nintendoswitch wasi unknown_wasm
+// +build baremetal nintendoswitch wasi wasm_freestanding
 
 // Other systems that aren't operating systems supported by the Go toolchain
 // need to pretend to be an existing operating system. Linux seems like a good
diff --git a/src/runtime/runtime_tinygowasm.go b/src/runtime/runtime_tinygowasm.go
index da3305a943..efba1b8995 100644
--- a/src/runtime/runtime_tinygowasm.go
+++ b/src/runtime/runtime_tinygowasm.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm && !unknown_wasm
-// +build tinygo.wasm,!unknown_wasm
+//go:build tinygo.wasm && !wasm_freestanding
+// +build tinygo.wasm,!wasm_freestanding
 
 package runtime
 
diff --git a/src/runtime/runtime_unix.go b/src/runtime/runtime_unix.go
index 6063959e25..1a4f7523f3 100644
--- a/src/runtime/runtime_unix.go
+++ b/src/runtime/runtime_unix.go
@@ -1,5 +1,5 @@
-//go:build (darwin || (linux && !baremetal && !wasi && !unknown_wasm)) && !nintendoswitch
-// +build darwin linux,!baremetal,!wasi,!unknown_wasm
+//go:build (darwin || (linux && !baremetal && !wasi && !wasm_freestanding)) && !nintendoswitch
+// +build darwin linux,!baremetal,!wasi,!wasm_freestanding
 // +build !nintendoswitch
 
 package runtime
diff --git a/src/runtime/runtime_wasm_unknown.go b/src/runtime/runtime_wasm_freestanding.go
similarity index 95%
rename from src/runtime/runtime_wasm_unknown.go
rename to src/runtime/runtime_wasm_freestanding.go
index 69d8a9a7f2..37ffe6965b 100644
--- a/src/runtime/runtime_wasm_unknown.go
+++ b/src/runtime/runtime_wasm_freestanding.go
@@ -1,5 +1,5 @@
-//go:build unknown_wasm
-// +build unknown_wasm
+//go:build wasm_freestanding
+// +build wasm_freestanding
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_js.go b/src/runtime/runtime_wasm_js.go
index 1f7bf5a2b3..47368c9806 100644
--- a/src/runtime/runtime_wasm_js.go
+++ b/src/runtime/runtime_wasm_js.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi && !unknown_wasm
-// +build wasm,!wasi,!unknown_wasm
+//go:build wasm && !wasi && !wasm_freestanding
+// +build wasm,!wasi,!wasm_freestanding
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_js_scheduler.go b/src/runtime/runtime_wasm_js_scheduler.go
index 534f673bd2..2826718450 100644
--- a/src/runtime/runtime_wasm_js_scheduler.go
+++ b/src/runtime/runtime_wasm_js_scheduler.go
@@ -1,5 +1,5 @@
-//go:build wasm && !wasi && !unknown_wasm && !scheduler.none
-// +build wasm,!wasi,!unknown_wasm,!scheduler.none
+//go:build wasm && !wasi && !wasm_freestanding && !scheduler.none
+// +build wasm,!wasi,!wasm_freestanding,!scheduler.none
 
 package runtime
 
diff --git a/src/runtime/runtime_wasm_wasi.go b/src/runtime/runtime_wasm_wasi.go
index 1ecae905fd..c25d0bc5bb 100644
--- a/src/runtime/runtime_wasm_wasi.go
+++ b/src/runtime/runtime_wasm_wasi.go
@@ -1,5 +1,5 @@
-//go:build tinygo.wasm && wasi && !unknown_wasm
-// +build tinygo.wasm,wasi,!unknown_wasm
+//go:build tinygo.wasm && wasi && !wasm_freestanding
+// +build tinygo.wasm,wasi,!wasm_freestanding
 
 package runtime
 
diff --git a/src/syscall/file_emulated.go b/src/syscall/file_emulated.go
index 3687e8dd57..992516850b 100644
--- a/src/syscall/file_emulated.go
+++ b/src/syscall/file_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasm || unknown_wasm
-// +build baremetal wasm unknown_wasm
+//go:build baremetal || wasm || wasm_freestanding
+// +build baremetal wasm wasm_freestanding
 
 // This file emulates some file-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/file_hosted.go b/src/syscall/file_hosted.go
index e980deb7bd..bdcaa9808c 100644
--- a/src/syscall/file_hosted.go
+++ b/src/syscall/file_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasm && !unknown_wasm
-// +build !baremetal,!wasm,!unknown_wasm
+//go:build !baremetal && !wasm && !wasm_freestanding
+// +build !baremetal,!wasm,!wasm_freestanding
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/proc_emulated.go b/src/syscall/proc_emulated.go
index 0176d337d0..9bf1530150 100644
--- a/src/syscall/proc_emulated.go
+++ b/src/syscall/proc_emulated.go
@@ -1,5 +1,5 @@
-//go:build baremetal || wasi || wasm || unknown_wasm
-// +build baremetal wasi wasm unknown_wasm
+//go:build baremetal || wasi || wasm || wasm_freestanding
+// +build baremetal wasi wasm wasm_freestanding
 
 // This file emulates some process-related functions that are only available
 // under a real operating system.
diff --git a/src/syscall/proc_hosted.go b/src/syscall/proc_hosted.go
index 4e386d039d..e0aa4f8c05 100644
--- a/src/syscall/proc_hosted.go
+++ b/src/syscall/proc_hosted.go
@@ -1,5 +1,5 @@
-//go:build !baremetal && !wasi && !wasm && !unknown_wasm
-// +build !baremetal,!wasi,!wasm,!unknown_wasm
+//go:build !baremetal && !wasi && !wasm && !wasm_freestanding
+// +build !baremetal,!wasi,!wasm,!wasm_freestanding
 
 // This file assumes there is a libc available that runs on a real operating
 // system.
diff --git a/src/syscall/syscall_nonhosted.go b/src/syscall/syscall_nonhosted.go
index b35e122d4e..315d2fa5ae 100644
--- a/src/syscall/syscall_nonhosted.go
+++ b/src/syscall/syscall_nonhosted.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || unknown_wasm
-// +build baremetal js unknown_wasm
+//go:build baremetal || js || wasm_freestanding
+// +build baremetal js wasm_freestanding
 
 package syscall
 
diff --git a/src/syscall/tables_nonhosted.go b/src/syscall/tables_nonhosted.go
index 1a7173144f..49b1a7dd8d 100644
--- a/src/syscall/tables_nonhosted.go
+++ b/src/syscall/tables_nonhosted.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.
 
-//go:build baremetal || nintendoswitch || js || unknown_wasm
-// +build baremetal nintendoswitch js unknown_wasm
+//go:build baremetal || nintendoswitch || js || wasm_freestanding
+// +build baremetal nintendoswitch js wasm_freestanding
 
 package syscall
 
diff --git a/targets/unknown_wasm.json b/targets/wasm-freestanding.json
similarity index 100%
rename from targets/unknown_wasm.json
rename to targets/wasm-freestanding.json

From c2235d39dbbb9de4e5593d5c43e3029ab08f5d7a Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Mon, 29 Aug 2022 11:03:43 +0800
Subject: [PATCH 4/6] feat: make std read return EOF for wasm freestanding

---
 src/os/file_other.go                     | 5 +++++
 src/runtime/runtime_wasm_freestanding.go | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/os/file_other.go b/src/os/file_other.go
index 3c5318e5b0..35746a5823 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -4,6 +4,7 @@
 package os
 
 import (
+	"io"
 	_ "unsafe"
 )
 
@@ -46,6 +47,10 @@ func (f stdioFileHandle) Read(b []byte) (n int, err error) {
 	}
 
 	size := buffered()
+	if size < 0 {
+		return 0, io.EOF
+	}
+
 	for size == 0 {
 		gosched()
 		size = buffered()
diff --git a/src/runtime/runtime_wasm_freestanding.go b/src/runtime/runtime_wasm_freestanding.go
index 37ffe6965b..8e02300728 100644
--- a/src/runtime/runtime_wasm_freestanding.go
+++ b/src/runtime/runtime_wasm_freestanding.go
@@ -38,7 +38,7 @@ func getchar() byte {
 }
 
 func buffered() int {
-	return 0
+	return -1
 }
 
 type timeUnit int64

From 136adc3e791a595583410fdfafc6e3185df75615 Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Mon, 29 Aug 2022 11:21:43 +0800
Subject: [PATCH 5/6] feat: remove Singal in wasm freestanding

---
 src/os/file_other.go             | 4 ++++
 src/syscall/syscall_nonhosted.go | 4 ++--
 src/syscall/tables_nonhosted.go  | 4 ++--
 targets/wasm-freestanding.json   | 2 +-
 4 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/os/file_other.go b/src/os/file_other.go
index 35746a5823..288c4b9954 100644
--- a/src/os/file_other.go
+++ b/src/os/file_other.go
@@ -42,6 +42,10 @@ func NewFile(fd uintptr, name string) *File {
 // Read reads up to len(b) bytes from machine.Serial.
 // It returns the number of bytes read and any error encountered.
 func (f stdioFileHandle) Read(b []byte) (n int, err error) {
+	if f != 0 {
+		return 0, ErrUnsupported
+	}
+
 	if len(b) == 0 {
 		return 0, nil
 	}
diff --git a/src/syscall/syscall_nonhosted.go b/src/syscall/syscall_nonhosted.go
index 315d2fa5ae..399e97428b 100644
--- a/src/syscall/syscall_nonhosted.go
+++ b/src/syscall/syscall_nonhosted.go
@@ -1,5 +1,5 @@
-//go:build baremetal || js || wasm_freestanding
-// +build baremetal js wasm_freestanding
+//go:build baremetal || js
+// +build baremetal js
 
 package syscall
 
diff --git a/src/syscall/tables_nonhosted.go b/src/syscall/tables_nonhosted.go
index 49b1a7dd8d..ae0c7cc573 100644
--- a/src/syscall/tables_nonhosted.go
+++ b/src/syscall/tables_nonhosted.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.
 
-//go:build baremetal || nintendoswitch || js || wasm_freestanding
-// +build baremetal nintendoswitch js wasm_freestanding
+//go:build baremetal || nintendoswitch || js
+// +build baremetal nintendoswitch js
 
 package syscall
 
diff --git a/targets/wasm-freestanding.json b/targets/wasm-freestanding.json
index a53cbf9901..f5017affe0 100644
--- a/targets/wasm-freestanding.json
+++ b/targets/wasm-freestanding.json
@@ -2,7 +2,7 @@
 	"llvm-target":   "wasm32-unknown-unknown",
 	"cpu":           "generic",
 	"features":      "+bulk-memory,+nontrapping-fptoint,+sign-ext",
-	"build-tags":    ["tinygo.wasm", "unknown_wasm", "runtime_memhash_leveldb"],
+	"build-tags":    ["tinygo.wasm", "wasm_freestanding", "runtime_memhash_leveldb"],
 	"goos":          "linux",
 	"goarch":        "arm",
 	"linker":        "wasm-ld",

From c0b37f4f2ec77989fd8c19e0eb143b78b3820d61 Mon Sep 17 00:00:00 2001
From: hunjixin <1084400399@qq.com>
Date: Thu, 29 Sep 2022 20:37:41 +0800
Subject: [PATCH 6/6] fix wrong wasm directive

---
 src/os/stat_linux.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/os/stat_linux.go b/src/os/stat_linux.go
index 0d981834e0..1c657a9264 100644
--- a/src/os/stat_linux.go
+++ b/src/os/stat_linux.go
@@ -1,5 +1,5 @@
-//go:build linux && !baremetal && !unknow_wasm
-// +build linux,!baremetal,!unknow_wasm
+//go:build linux && !baremetal && !wasm_freestanding
+// +build linux,!baremetal,!wasm_freestanding
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style