Prepare for release 0.37.0

Signed-off-by: deadprogram <ron@hybridgroup.com>

.github/workflows/linux.yml

@@ -165,6 +165,7 @@ jobs:
           ln -s ~/lib/tinygo/bin/tinygo ~/go/bin/tinygo
       - run: make tinygo-test-wasip1-fast
       - run: make tinygo-test-wasip2-fast
+      - run: make tinygo-test-wasm
       - run: make smoketest
   assert-test-linux:
     # Run all tests that can run on Linux, with LLVM assertions enabled to catch
@@ -277,7 +278,7 @@ jobs:
         run: make tinygo-test
       - run: make smoketest
       - run: make wasmtest
-      - run: make tinygo-baremetal
+      - run: make tinygo-test-baremetal
   build-linux-cross:
     # Build ARM Linux binaries, ready for release.
     # This intentionally uses an older Linux image, so that we compile against

.github/workflows/nix.yml

@@ -22,9 +22,9 @@ jobs:
         run: sudo apt-get remove llvm-18
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Pull musl
+      - name: Pull musl, bdwgc
         run: |
-            git submodule update --init lib/musl
+            git submodule update --init lib/musl lib/bdwgc
       - name: Restore LLVM source cache
         uses: actions/cache/restore@v4
         id: cache-llvm-source

.gitmodules

@@ -39,3 +39,6 @@
 [submodule "lib/wasi-cli"]
 	path = lib/wasi-cli
 	url = https://github.com/WebAssembly/wasi-cli
+[submodule "lib/bdwgc"]
+	path = lib/bdwgc
+	url = https://github.com/ivmai/bdwgc.git

CHANGELOG.md

@@ -1,3 +1,122 @@
+0.37.0
+---
+* **general**
+  - add the Boehm-Demers-Weiser GC on Linux
+* **ci**
+  - add more tests for wasm and baremetal
+* **compiler**
+  - crypto/internal/sysrand is allowed to use unsafe signatures
+* **examples**
+  - add goroutine benchmark to examples
+* **fixes**
+  - ensure use of pointers for SPI interface on atsam21/atsam51 and other machines/boards that were missing implementation (#4798)
+  - replace loop counter with hw timer for USB SetAddressReq on rp2040 (#4796)
+* **internal**
+  - update to go.bytecodealliance.org@v0.6.2 in GNUmakefile and internal/wasm-tools
+  - exclude certain files when copying package in internal/cm
+  - update to go.bytecodealliance.org/cm@v0.2.2 in internal/cm
+  - remove old reflect.go in internal/reflectlite
+* **loader**
+  - use build tags for package iter and iter methods on reflect.Value in loader, iter, reflect
+  - add shim for go1.22 and earlier in loader, iter
+* **machine**
+  - bump rp2040 to 200MHz (#4768)
+  - correct register address for Pin.SetInterrupt for rp2350 (#4782)
+  - don't block the rp2xxx UART interrupt handler
+  - fix RP2040 Pico board on the playground
+  - add flash support for rp2350 (#4803)
+* **os**
+  - add stub Symlink for wasm
+* **refactor**
+  - use *SPI everywhere to make consistent for implementations. Fixes #4663 "in reverse" by making SPI a pointer everywhere, as discussed in the comments.
+* **reflect**
+  - add Value.SetIter{Key,Value} and MapIter.Reset in reflect, internal/reflectlite
+  - embed reflectlite types into reflect types in reflect, internal/reflectlite
+  - add Go 1.24 iter.Seq[2] methods
+  - copy reflect iter tests from upstream Go
+  - panic on Type.CanSeq[2] instead of returning false
+  - remove strconv.go
+  - remove unused go:linkname functions
+* **riscv-qemu**
+  - add VirtIO RNG device
+  - increase stack size
+* **runtime**
+  - only allocate heap memory when needed
+  - remove unused file func.go
+  - use package reflectlite
+* **transform**
+  - cherry-pick from #4774
+
+
+0.36.0
+---
+* **general**
+  - add initial Go 1.24 support
+  - add support for LLVM 19
+  - update license for 2025
+  - make small corrections for README regarding wasm
+  - use GOOS and GOARCH for building wasm simulated boards
+  - only infer target for wasm when GOOS and GOARCH are set correctly, not just based on file extension
+  - add test-corpus-wasip2
+  - use older image for cross-compiling builds
+  - update Linux builds to run on ubuntu-latest since 20.04 is being retired
+  - ensure build output directory is created
+  - add NoSandbox flag to chrome headless that is run during WASM tests, since this is now required for Ubuntu 23+ and we are using Ubuntu 24+ when running Github Actions
+  - update wasmtime used for CI to 29.0.1 to fix issue with install during CI tests
+  - update to use `Get-CimInstance` as `wmic` is being deprecated on WIndows
+  - remove unnecessary executable permissions
+  - `goenv`: update to new v0.36.0 development version
+* **compiler**
+  - `builder`: fix parsing of external ld.lld error messages
+  - `cgo`: mangle identifier names
+  - `interp`: correctly mark functions as modifying memory
+  - add buildmode=wasi-legacy to support existing base of users who expected the older behavior for wasi modules to not return an exit code as if they were reactors
+* **standard library**
+  - `crypto/tls`: add Dialer.DialContext() to fix websocket client
+  - `crypto/tls`: add VersionTLS constants and VersionName(version uint16) method that turns it into a string, copied from big go
+  - `internal/syscall/unix`: use our own version of this package
+  - `machine`: replace hard-coded cpu frequencies on rp2xxx
+  - `machine`: bump rp2350 CPUFrequency to 150 MHz
+  - `machine`: compute rp2 clock dividers from crystal and target frequency
+  - `machine`: remove bytes package dependency in flash code
+  - `machine/usb/descriptor`: avoid bytes package
+  - `net`: update to latest submodule with httptest subpackage and ResolveIPAddress implementation
+  - `os`: add File.Chdir support
+  - `os`: implement stub Chdir for non-OS systems
+  - `os/file`: add file.Chmod
+  - `reflect`: implement Value.Equal
+  - `runtime`: add FIPS helper functions
+  - `runtime`: manually initialize xorshift state
+  - `sync`: move Mutex to internal/task
+  - `syscall`: add wasip1 RandomGet
+  - `testing`: add Chdir
+  - `wasip2`: add stubs to get internal/syscall/unix to work
+* **fixes**
+  - correctly handle calls for GetRNG() when being made from nrf devices with SoftDevice enabled
+  - fix stm32f103 ADC
+  - `wasm`: correctly handle id lookup for finalizeRef call
+  - `wasm`: avoid total failure on wasm finalizer call
+  - `wasm`: convert offset as signed int into unsigned int in syscall/js.stringVal in wasm_exec.js
+* **targets**
+  - rp2350: add pll generalized solution; fix ADC handles; pwm period fix
+  - rp2350: extending support to include the rp2350b
+  - rp2350: cleanup: unexport internal USB and clock package variable, consts and types
+  - nrf: make ADC resolution changeable
+  - turn on GC for TKey1 device, since it does in fact work
+  - match Pico2 stack size to Pico
+* **boards**
+  - add support for Pimoroni Pico Plus2
+  - add target for pico2-w board
+  - add comboat_fw tag for elecrow W5 boards with Combo-AT Wifi firmware
+  - add support for Elecrow Pico rp2350 W5 boards
+  - add support for Elecrow Pico rp2040 W5 boards
+  - add support for NRF51 HW-651
+  - add support for esp32c3-supermini
+  - add support for waveshare-rp2040-tiny
+* **examples**
+  - add naive debouncing for pininterrupt example
+
+
 0.35.0
 ---
 * **general**

GNUmakefile

@@ -267,16 +267,17 @@ lib/wasi-libc/sysroot/lib/wasm32-wasi/libc.a:
 	cd lib/wasi-libc && $(MAKE) -j4 EXTRA_CFLAGS="-O2 -g -DNDEBUG -mnontrapping-fptoint -msign-ext" MALLOC_IMPL=none CC="$(CLANG)" AR=$(LLVM_AR) NM=$(LLVM_NM)
 
 # Generate WASI syscall bindings
-WASM_TOOLS_MODULE=github.com/bytecodealliance/wasm-tools-go
+WASM_TOOLS_MODULE=go.bytecodealliance.org
 .PHONY: wasi-syscall
 wasi-syscall: wasi-cm
+	rm -rf ./src/internal/wasi/*
 	go run -modfile ./internal/wasm-tools/go.mod $(WASM_TOOLS_MODULE)/cmd/wit-bindgen-go generate --versioned -o ./src/internal -p internal --cm internal/cm ./lib/wasi-cli/wit
 
 # Copy package cm into src/internal/cm
 .PHONY: wasi-cm
 wasi-cm:
-	# rm -rf ./src/internal/cm
+	rm -rf ./src/internal/cm/*
-	rsync -rv --delete --exclude '*_test.go' $(shell go list -modfile ./internal/wasm-tools/go.mod -m -f {{.Dir}} $(WASM_TOOLS_MODULE))/cm ./src/internal/
+	rsync -rv --delete --exclude go.mod --exclude '*_test.go' --exclude '*_json.go' --exclude '*.md' --exclude LICENSE $(shell go list -modfile ./internal/wasm-tools/go.mod -m -f {{.Dir}} $(WASM_TOOLS_MODULE)/cm)/ ./src/internal/cm
 
 # Check for Node.js used during WASM tests.
 NODEJS_VERSION := $(word 1,$(subst ., ,$(shell node -v | cut -c 2-)))
@@ -407,6 +408,36 @@ TEST_PACKAGES_WINDOWS := \
 	text/template/parse \
 	$(nil)
 
+
+# These packages cannot be tested on wasm, mostly because these tests assume a
+# working filesystem. This could perhaps be fixed, by supporting filesystem
+# access when running inside Node.js.
+TEST_PACKAGES_WASM = $(filter-out $(TEST_PACKAGES_NONWASM), $(TEST_PACKAGES_FAST))
+TEST_PACKAGES_NONWASM = \
+	compress/lzw \
+	compress/zlib \
+	crypto/ecdsa \
+	debug/macho \
+	embed/internal/embedtest \
+	go/format \
+	os \
+	testing \
+	$(nil)
+
+# These packages cannot be tested on baremetal.
+#
+# Some reasons why the tests don't pass on baremetal:
+#
+#   * No filesystem is available, so packages like compress/zlib can't be tested
+#     (just like wasm).
+#   * picolibc math functions apparently are less precise, the math package
+#     fails on baremetal.
+TEST_PACKAGES_BAREMETAL = $(filter-out $(TEST_PACKAGES_NONBAREMETAL), $(TEST_PACKAGES_FAST))
+TEST_PACKAGES_NONBAREMETAL = \
+	$(TEST_PACKAGES_NONWASM) \
+	math \
+	$(nil)
+
 # Report platforms on which each standard library package is known to pass tests
 jointmp := $(shell echo /tmp/join.$$$$)
 report-stdlib-tests-pass:
@@ -450,6 +481,8 @@ tinygo-bench-fast:
 	$(TINYGO) test -bench . $(TEST_PACKAGES_HOST)
 
 # Same thing, except for wasi rather than the current platform.
+tinygo-test-wasm:
+	$(TINYGO) test -target wasm $(TEST_PACKAGES_WASM)
 tinygo-test-wasi:
 	$(TINYGO) test -target wasip1 $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_SLOW) ./tests/runtime_wasi
 tinygo-test-wasip1:
@@ -484,6 +517,10 @@ tinygo-bench-wasip2:
 tinygo-bench-wasip2-fast:
 	$(TINYGO) test -target wasip2 -bench . $(TEST_PACKAGES_FAST)
 
+# Run tests on riscv-qemu since that one provides a large amount of memory.
+tinygo-test-baremetal:
+	$(TINYGO) test -target riscv-qemu $(TEST_PACKAGES_BAREMETAL)
+
 # Test external packages in a large corpus.
 test-corpus:
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml
@@ -491,11 +528,8 @@ test-corpus-fast:
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus -short . -corpus=testdata/corpus.yaml
 test-corpus-wasi: wasi-libc
 	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml -target=wasip1
-
+test-corpus-wasip2: wasi-libc
-tinygo-baremetal:
+	CGO_CPPFLAGS="$(CGO_CPPFLAGS)" CGO_CXXFLAGS="$(CGO_CXXFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) test $(GOTESTFLAGS) -timeout=1h -buildmode exe -tags byollvm -run TestCorpus . -corpus=testdata/corpus.yaml -target=wasip2
-	# Regression tests that run on a baremetal target and don't fit in either main_test.go or smoketest.
-	# regression test for #2666: e.g. encoding/hex must pass on baremetal
-	$(TINYGO) test -target cortex-m-qemu encoding/hex
 
 .PHONY: testchdir
 testchdir:
@@ -567,21 +601,23 @@ smoketest: testchdir
 	@$(MD5SUM) test.hex
 	# test simulated boards on play.tinygo.org
 ifneq ($(WASM), 0)
-	$(TINYGO) build -size short -o test.wasm -tags=arduino              examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=arduino              examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=hifive1b             examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=hifive1b             examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=reelboard            examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=reelboard            examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=microbit             examples/microbit-blink
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=microbit             examples/microbit-blink
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_express  examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=circuitplay_express  examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=circuitplay_bluefruit examples/blinky1
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/machinetest
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=mch2022              examples/machinetest
 	@$(MD5SUM) test.wasm
-	$(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=gopher_badge         examples/blinky1
+	@$(MD5SUM) test.wasm
+	GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=pico                 examples/blinky1
 	@$(MD5SUM) test.wasm
 endif
 	# test all targets/boards
@@ -905,6 +941,7 @@ wasmtest:
 
 build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN)),,binaryen)
 	@mkdir -p build/release/tinygo/bin
+	@mkdir -p build/release/tinygo/lib/bdwgc
 	@mkdir -p build/release/tinygo/lib/clang/include
 	@mkdir -p build/release/tinygo/lib/CMSIS/CMSIS
 	@mkdir -p build/release/tinygo/lib/macos-minimal-sdk
@@ -926,6 +963,7 @@ build/release: tinygo gen-device wasi-libc $(if $(filter 1,$(USE_SYSTEM_BINARYEN
 ifneq ($(USE_SYSTEM_BINARYEN),1)
 	@cp -p  build/wasm-opt$(EXE)         build/release/tinygo/bin
 endif
+	@cp -rp lib/bdwgc/*                  build/release/tinygo/lib/bdwgc
 	@cp -p $(abspath $(CLANG_SRC))/lib/Headers/*.h build/release/tinygo/lib/clang/include
 	@cp -rp lib/CMSIS/CMSIS/Include      build/release/tinygo/lib/CMSIS/CMSIS
 	@cp -rp lib/CMSIS/README.md          build/release/tinygo/lib/CMSIS
@@ -939,6 +977,7 @@ endif
 	@cp -rp lib/musl/crt/crt1.c          build/release/tinygo/lib/musl/crt
 	@cp -rp lib/musl/COPYRIGHT           build/release/tinygo/lib/musl
 	@cp -rp lib/musl/include             build/release/tinygo/lib/musl
+	@cp -rp lib/musl/src/ctype           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/env             build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/errno           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/exit            build/release/tinygo/lib/musl/src
@@ -953,8 +992,10 @@ endif
 	@cp -rp lib/musl/src/math            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/misc            build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/multibyte       build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/sched           build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/signal          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/stdio           build/release/tinygo/lib/musl/src
+	@cp -rp lib/musl/src/stdlib          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/string          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/thread          build/release/tinygo/lib/musl/src
 	@cp -rp lib/musl/src/time            build/release/tinygo/lib/musl/src

LICENSE

@@ -1,7 +1,7 @@
-Copyright (c) 2018-2023 The TinyGo Authors. All rights reserved.
+Copyright (c) 2018-2025 The TinyGo Authors. All rights reserved.
 
 TinyGo includes portions of the Go standard library.
-Copyright (c) 2009-2023 The Go Authors. All rights reserved.
+Copyright (c) 2009-2024 The Go Authors. All rights reserved.
 
 TinyGo includes portions of LLVM, which is under the Apache License v2.0 with
 LLVM Exceptions. See https://llvm.org/LICENSE.txt for license information.

README.md

@@ -48,20 +48,22 @@ Here is a small TinyGo program for use by a WASI host application:
 ```go
 package main
 
-//go:wasm-module yourmodulename
+//go:wasmexport add
-//export add
 func add(x, y uint32) uint32 {
 	return x + y
 }
-
-// main is required for the `wasip1` target, even if it isn't used.
-func main() {}
 ```
 
-This compiles the above TinyGo program for use on any WASI runtime:
+This compiles the above TinyGo program for use on any WASI Preview 1 runtime:
 
 ```shell
-tinygo build -o main.wasm -target=wasip1 main.go
+tinygo build -buildmode=c-shared -o add.wasm -target=wasip1 add.go
+```
+
+You can also use the same syntax as Go 1.24+:
+
+```shell
+GOARCH=wasip1 GOOS=wasm tinygo build -buildmode=c-shared -o add.wasm add.go
 ```
 
 ## Installation

builder/bdwgc.go

@@ -0,0 +1,71 @@
+package builder
+
+// The well-known conservative Boehm-Demers-Weiser GC.
+// This file provides a way to compile this GC for use with TinyGo.
+
+import (
+	"path/filepath"
+
+	"github.com/tinygo-org/tinygo/goenv"
+)
+
+var BoehmGC = Library{
+	name: "bdwgc",
+	cflags: func(target, headerPath string) []string {
+		libdir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
+		return []string{
+			// use a modern environment
+			"-DUSE_MMAP",              // mmap is available
+			"-DUSE_MUNMAP",            // return memory to the OS using munmap
+			"-DGC_BUILTIN_ATOMIC",     // use compiler intrinsics for atomic operations
+			"-DNO_EXECUTE_PERMISSION", // don't make the heap executable
+
+			// specific flags for TinyGo
+			"-DALL_INTERIOR_POINTERS",  // scan interior pointers (needed for Go)
+			"-DIGNORE_DYNAMIC_LOADING", // we don't support dynamic loading at the moment
+			"-DNO_GETCONTEXT",          // musl doesn't support getcontext()
+
+			// Special flag to work around the lack of __data_start in ld.lld.
+			// TODO: try to fix this in LLVM/lld directly so we don't have to
+			// work around it anymore.
+			"-DGC_DONT_REGISTER_MAIN_STATIC_DATA",
+
+			// Do not scan the stack. We have our own mechanism to do this.
+			"-DSTACK_NOT_SCANNED",
+
+			// Assertions can be enabled while debugging GC issues.
+			//"-DGC_ASSERTIONS",
+
+			// Threading is not yet supported, so these are disabled.
+			//"-DGC_THREADS",
+			//"-DTHREAD_LOCAL_ALLOC",
+
+			"-I" + libdir + "/include",
+		}
+	},
+	sourceDir: func() string {
+		return filepath.Join(goenv.Get("TINYGOROOT"), "lib/bdwgc")
+	},
+	librarySources: func(target string) ([]string, error) {
+		return []string{
+			"allchblk.c",
+			"alloc.c",
+			"blacklst.c",
+			"dbg_mlc.c",
+			"dyn_load.c",
+			"finalize.c",
+			"headers.c",
+			"mach_dep.c",
+			"malloc.c",
+			"mark.c",
+			"mark_rts.c",
+			"misc.c",
+			"new_hblk.c",
+			"obj_map.c",
+			"os_dep.c",
+			"pthread_stop_world.c",
+			"pthread_support.c",
+			"reclaim.c",
+		}, nil
+	},
+}

builder/build.go

@@ -147,20 +147,22 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	// the libc needs them.
 	root := goenv.Get("TINYGOROOT")
 	var libcDependencies []*compileJob
+	var libcJob *compileJob
 	switch config.Target.Libc {
 	case "darwin-libSystem":
 		job := makeDarwinLibSystemJob(config, tmpdir)
 		libcDependencies = append(libcDependencies, job)
 	case "musl":
-		job, unlock, err := libMusl.load(config, tmpdir)
+		var unlock func()
+		libcJob, unlock, err = libMusl.load(config, tmpdir, nil)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
-		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(job.result), "crt1.o")))
+		libcDependencies = append(libcDependencies, dummyCompileJob(filepath.Join(filepath.Dir(libcJob.result), "crt1.o")))
-		libcDependencies = append(libcDependencies, job)
+		libcDependencies = append(libcDependencies, libcJob)
 	case "picolibc":
-		libcJob, unlock, err := libPicolibc.load(config, tmpdir)
+		libcJob, unlock, err := libPicolibc.load(config, tmpdir, nil)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -173,14 +175,14 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		}
 		libcDependencies = append(libcDependencies, dummyCompileJob(path))
 	case "wasmbuiltins":
-		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir)
+		libcJob, unlock, err := libWasmBuiltins.load(config, tmpdir, nil)
 		if err != nil {
 			return BuildResult{}, err
 		}
 		defer unlock()
 		libcDependencies = append(libcDependencies, libcJob)
 	case "mingw-w64":
-		job, unlock, err := libMinGW.load(config, tmpdir)
+		job, unlock, err := libMinGW.load(config, tmpdir, nil)
 		if err != nil {
 			return BuildResult{}, err
 		}
@@ -449,8 +451,15 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 					if global.IsNil() {
 						return errors.New("global not found: " + globalName)
 					}
+					globalType := global.GlobalValueType()
+					if globalType.TypeKind() != llvm.StructTypeKind || globalType.StructName() != "runtime._string" {
+						// Verify this is indeed a string. This is needed so
+						// that makeGlobalsModule can just create the right
+						// globals of string type without checking.
+						return fmt.Errorf("%s: not a string", globalName)
+					}
 					name := global.Name()
-					newGlobal := llvm.AddGlobal(mod, global.GlobalValueType(), name+".tmp")
+					newGlobal := llvm.AddGlobal(mod, globalType, name+".tmp")
 					global.ReplaceAllUsesWith(newGlobal)
 					global.EraseFromParentAsGlobal()
 					newGlobal.SetName(name)
@@ -538,6 +547,15 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 				}
 			}
 
+			// Insert values from -ldflags="-X ..." into the IR.
+			// This is a separate module, so that the "runtime._string" type
+			// doesn't need to match precisely. LLVM tends to rename that type
+			// sometimes, leading to errors. But linking in a separate module
+			// works fine. See:
+			// https://github.com/tinygo-org/tinygo/issues/4810
+			globalsMod := makeGlobalsModule(ctx, globalValues, machine)
+			llvm.LinkModules(mod, globalsMod)
+
 			// Create runtime.initAll function that calls the runtime
 			// initializer of each package.
 			llvmInitFn := mod.NamedFunction("runtime.initAll")
@@ -590,7 +608,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 
 			// Run all optimization passes, which are much more effective now
 			// that the optimizer can see the whole program at once.
-			err := optimizeProgram(mod, config, globalValues)
+			err := optimizeProgram(mod, config)
 			if err != nil {
 				return err
 			}
@@ -685,7 +703,7 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 	// Add compiler-rt dependency if needed. Usually this is a simple load from
 	// a cache.
 	if config.Target.RTLib == "compiler-rt" {
-		job, unlock, err := libCompilerRT.load(config, tmpdir)
+		job, unlock, err := libCompilerRT.load(config, tmpdir, nil)
 		if err != nil {
 			return result, err
 		}
@@ -693,6 +711,19 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
 		linkerDependencies = append(linkerDependencies, job)
 	}
 
+	// The Boehm collector is stored in a separate C library.
+	if config.GC() == "boehm" {
+		if libcJob == nil {
+			return BuildResult{}, fmt.Errorf("boehm GC isn't supported with libc %s", config.Target.Libc)
+		}
+		job, unlock, err := BoehmGC.load(config, tmpdir, libcJob)
+		if err != nil {
+			return BuildResult{}, err
+		}
+		defer unlock()
+		linkerDependencies = append(linkerDependencies, job)
+	}
+
 	// Add jobs to compile extra files. These files are in C or assembly and
 	// contain things like the interrupt vector table and low level operations
 	// such as stack switching.
@@ -1145,7 +1176,7 @@ func createEmbedObjectFile(data, hexSum, sourceFile, sourceDir, tmpdir string, c
 // optimizeProgram runs a series of optimizations and transformations that are
 // needed to convert a program to its final form. Some transformations are not
 // optional and must be run as the compiler expects them to run.
-func optimizeProgram(mod llvm.Module, config *compileopts.Config, globalValues map[string]map[string]string) error {
+func optimizeProgram(mod llvm.Module, config *compileopts.Config) error {
 	err := interp.Run(mod, config.Options.InterpTimeout, config.DumpSSA())
 	if err != nil {
 		return err
@@ -1163,12 +1194,6 @@ func optimizeProgram(mod llvm.Module, config *compileopts.Config, globalValues m
 		}
 	}
 
-	// Insert values from -ldflags="-X ..." into the IR.
-	err = setGlobalValues(mod, globalValues)
-	if err != nil {
-		return err
-	}
-
 	// Run most of the whole-program optimizations (including the whole
 	// O0/O1/O2/Os/Oz optimization pipeline).
 	errs := transform.Optimize(mod, config)
@@ -1182,10 +1207,19 @@ func optimizeProgram(mod llvm.Module, config *compileopts.Config, globalValues m
 	return nil
 }
 
-// setGlobalValues sets the global values from the -ldflags="-X ..." compiler
+func makeGlobalsModule(ctx llvm.Context, globals map[string]map[string]string, machine llvm.TargetMachine) llvm.Module {
-// option in the given module. An error may be returned if the global is not of
+	mod := ctx.NewModule("cmdline-globals")
-// the expected type.
+	targetData := machine.CreateTargetData()
-func setGlobalValues(mod llvm.Module, globals map[string]map[string]string) error {
+	defer targetData.Dispose()
+	mod.SetDataLayout(targetData.String())
+
+	stringType := ctx.StructCreateNamed("runtime._string")
+	uintptrType := ctx.IntType(targetData.PointerSize() * 8)
+	stringType.StructSetBody([]llvm.Type{
+		llvm.PointerType(ctx.Int8Type(), 0),
+		uintptrType,
+	}, false)
+
 	var pkgPaths []string
 	for pkgPath := range globals {
 		pkgPaths = append(pkgPaths, pkgPath)
@@ -1201,24 +1235,6 @@ func setGlobalValues(mod llvm.Module, globals map[string]map[string]string) erro
 		for _, name := range names {
 			value := pkg[name]
 			globalName := pkgPath + "." + name
-			global := mod.NamedGlobal(globalName)
-			if global.IsNil() || !global.Initializer().IsNil() {
-				// The global either does not exist (optimized away?) or has
-				// some value, in which case it has already been initialized at
-				// package init time.
-				continue
-			}
-
-			// A strin is a {ptr, len} pair. We need these types to build the
-			// initializer.
-			initializerType := global.GlobalValueType()
-			if initializerType.TypeKind() != llvm.StructTypeKind || initializerType.StructName() == "" {
-				return fmt.Errorf("%s: not a string", globalName)
-			}
-			elementTypes := initializerType.StructElementTypes()
-			if len(elementTypes) != 2 {
-				return fmt.Errorf("%s: not a string", globalName)
-			}
 
 			// Create a buffer for the string contents.
 			bufInitializer := mod.Context().ConstString(value, false)
@@ -1229,22 +1245,20 @@ func setGlobalValues(mod llvm.Module, globals map[string]map[string]string) erro
 			buf.SetLinkage(llvm.PrivateLinkage)
 
 			// Create the string value, which is a {ptr, len} pair.
-			zero := llvm.ConstInt(mod.Context().Int32Type(), 0, false)
+			length := llvm.ConstInt(uintptrType, uint64(len(value)), false)
-			ptr := llvm.ConstGEP(bufInitializer.Type(), buf, []llvm.Value{zero, zero})
+			initializer := llvm.ConstNamedStruct(stringType, []llvm.Value{
-			if ptr.Type() != elementTypes[0] {
+				buf,
-				return fmt.Errorf("%s: not a string", globalName)
-			}
-			length := llvm.ConstInt(elementTypes[1], uint64(len(value)), false)
-			initializer := llvm.ConstNamedStruct(initializerType, []llvm.Value{
-				ptr,
 				length,
 			})
 
-			// Set the initializer. No initializer should be set at this point.
+			// Create the string global.
+			global := llvm.AddGlobal(mod, stringType, globalName)
 			global.SetInitializer(initializer)
+			global.SetAlignment(targetData.PrefTypeAlignment(stringType))
 		}
 	}
-	return nil
+
+	return mod
 }
 
 // functionStackSizes keeps stack size information about a single function

builder/builder_test.go

@@ -69,7 +69,6 @@ func TestClangAttributes(t *testing.T) {
 		{GOOS: "darwin", GOARCH: "arm64"},
 		{GOOS: "windows", GOARCH: "amd64"},
 		{GOOS: "windows", GOARCH: "arm64"},
-		{GOOS: "wasip1", GOARCH: "wasm"},
 	} {
 		name := "GOOS=" + options.GOOS + ",GOARCH=" + options.GOARCH
 		if options.GOARCH == "arm" {

builder/library.go

@@ -43,7 +43,11 @@ type Library struct {
 // output archive file, it is expected to be removed after use.
 // As a side effect, this call creates the library header files if they didn't
 // exist yet.
-func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJob, abortLock func(), err error) {
+// The provided libc job (if not null) will cause this libc to be added as a
+// dependency for all C compiler jobs, and adds libc headers for the given
+// target config. In other words, pass this libc if the library needs a libc to
+// compile.
+func (l *Library) load(config *compileopts.Config, tmpdir string, libc *compileJob) (job *compileJob, abortLock func(), err error) {
 	outdir, precompiled := config.LibcPath(l.name)
 	archiveFilePath := filepath.Join(outdir, "lib.a")
 	if precompiled {
@@ -181,6 +185,9 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 			args = append(args, "-mfpu=vfpv2")
 		}
 	}
+	if libc != nil {
+		args = append(args, config.LibcCFlags()...)
+	}
 
 	var once sync.Once
 
@@ -233,7 +240,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 		objpath := filepath.Join(dir, cleanpath+".o")
 		os.MkdirAll(filepath.Dir(objpath), 0o777)
 		objs = append(objs, objpath)
-		job.dependencies = append(job.dependencies, &compileJob{
+		objfile := &compileJob{
 			description: "compile " + srcpath,
 			run: func(*compileJob) error {
 				var compileArgs []string
@@ -248,7 +255,11 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 				}
 				return nil
 			},
-		})
+		}
+		if libc != nil {
+			objfile.dependencies = append(objfile.dependencies, libc)
+		}
+		job.dependencies = append(job.dependencies, objfile)
 	}
 
 	// Create crt1.o job, if needed.
@@ -257,7 +268,7 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 	// won't make much of a difference in speed).
 	if l.crt1Source != "" {
 		srcpath := filepath.Join(sourceDir, l.crt1Source)
-		job.dependencies = append(job.dependencies, &compileJob{
+		crt1Job := &compileJob{
 			description: "compile " + srcpath,
 			run: func(*compileJob) error {
 				var compileArgs []string
@@ -277,7 +288,11 @@ func (l *Library) load(config *compileopts.Config, tmpdir string) (job *compileJ
 				}
 				return os.Rename(tmpfile.Name(), filepath.Join(outdir, "crt1.o"))
 			},
-		})
+		}
+		if libc != nil {
+			crt1Job.dependencies = append(crt1Job.dependencies, libc)
+		}
+		job.dependencies = append(job.dependencies, crt1Job)
 	}
 
 	ok = true

builder/musl.go

@@ -113,26 +113,32 @@ var libMusl = Library{
 	librarySources: func(target string) ([]string, error) {
 		arch := compileopts.MuslArchitecture(target)
 		globs := []string{
+			"ctype/*.c",
 			"env/*.c",
 			"errno/*.c",
 			"exit/*.c",
 			"fcntl/*.c",
 			"internal/defsysinfo.c",
+			"internal/intscan.c",
 			"internal/libc.c",
+			"internal/shgetc.c",
 			"internal/syscall_ret.c",
 			"internal/vdso.c",
 			"legacy/*.c",
 			"locale/*.c",
 			"linux/*.c",
+			"locale/*.c",
 			"malloc/*.c",
 			"malloc/mallocng/*.c",
 			"mman/*.c",
 			"math/*.c",
 			"misc/*.c",
 			"multibyte/*.c",
+			"sched/*.c",
 			"signal/" + arch + "/*.s",
 			"signal/*.c",
 			"stdio/*.c",
+			"stdlib/*.c",
 			"string/*.c",
 			"thread/" + arch + "/*.s",
 			"thread/*.c",

compileopts/config.go

@@ -261,6 +261,10 @@ func (c *Config) LibcPath(name string) (path string, precompiled bool) {
 	if c.Target.SoftFloat {
 		archname += "-softfloat"
 	}
+	if name == "bdwgc" {
+		// Boehm GC is compiled against a particular libc.
+		archname += "-" + c.Target.Libc
+	}
 
 	// Try to load a precompiled library.
 	precompiledDir := filepath.Join(goenv.Get("TINYGOROOT"), "pkg", archname, name)
@@ -315,59 +319,7 @@ func (c *Config) CFlags(libclang bool) []string {
 			"-resource-dir="+resourceDir,
 		)
 	}
-	switch c.Target.Libc {
+	cflags = append(cflags, c.LibcCFlags()...)
-	case "darwin-libSystem":
-		root := goenv.Get("TINYGOROOT")
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", filepath.Join(root, "lib/macos-minimal-sdk/src/usr/include"),
-		)
-	case "picolibc":
-		root := goenv.Get("TINYGOROOT")
-		picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
-		path, _ := c.LibcPath("picolibc")
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(picolibcDir, "include"),
-			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
-			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
-		)
-	case "musl":
-		root := goenv.Get("TINYGOROOT")
-		path, _ := c.LibcPath("musl")
-		arch := MuslArchitecture(c.Triple())
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
-			"-isystem", filepath.Join(root, "lib", "musl", "arch", "generic"),
-			"-isystem", filepath.Join(root, "lib", "musl", "include"),
-		)
-	case "wasi-libc":
-		root := goenv.Get("TINYGOROOT")
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", root+"/lib/wasi-libc/sysroot/include")
-	case "wasmbuiltins":
-		// nothing to add (library is purely for builtins)
-	case "mingw-w64":
-		root := goenv.Get("TINYGOROOT")
-		path, _ := c.LibcPath("mingw-w64")
-		cflags = append(cflags,
-			"-nostdlibinc",
-			"-isystem", filepath.Join(path, "include"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "crt"),
-			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "defaults", "include"),
-			"-D_UCRT",
-		)
-	case "":
-		// No libc specified, nothing to add.
-	default:
-		// Incorrect configuration. This could be handled in a better way, but
-		// usually this will be found by developers (not by TinyGo users).
-		panic("unknown libc: " + c.Target.Libc)
-	}
 	// Always emit debug information. It is optionally stripped at link time.
 	cflags = append(cflags, "-gdwarf-4")
 	// Use the same optimization level as TinyGo.
@@ -394,6 +346,68 @@ func (c *Config) CFlags(libclang bool) []string {
 	return cflags
 }
 
+// LibcCFlags returns the C compiler flags for the configured libc.
+// It only uses flags that are part of the libc path (triple, cpu, abi, libc
+// name) so it can safely be used to compile another C library.
+func (c *Config) LibcCFlags() []string {
+	switch c.Target.Libc {
+	case "darwin-libSystem":
+		root := goenv.Get("TINYGOROOT")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", filepath.Join(root, "lib/macos-minimal-sdk/src/usr/include"),
+		}
+	case "picolibc":
+		root := goenv.Get("TINYGOROOT")
+		picolibcDir := filepath.Join(root, "lib", "picolibc", "newlib", "libc")
+		path, _ := c.LibcPath("picolibc")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", filepath.Join(path, "include"),
+			"-isystem", filepath.Join(picolibcDir, "include"),
+			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
+			"-D__PICOLIBC_ERRNO_FUNCTION=__errno_location",
+		}
+	case "musl":
+		root := goenv.Get("TINYGOROOT")
+		path, _ := c.LibcPath("musl")
+		arch := MuslArchitecture(c.Triple())
+		return []string{
+			"-nostdlibinc",
+			"-isystem", filepath.Join(path, "include"),
+			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
+			"-isystem", filepath.Join(root, "lib", "musl", "arch", "generic"),
+			"-isystem", filepath.Join(root, "lib", "musl", "include"),
+		}
+	case "wasi-libc":
+		root := goenv.Get("TINYGOROOT")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", root + "/lib/wasi-libc/sysroot/include",
+		}
+	case "wasmbuiltins":
+		// nothing to add (library is purely for builtins)
+		return nil
+	case "mingw-w64":
+		root := goenv.Get("TINYGOROOT")
+		path, _ := c.LibcPath("mingw-w64")
+		return []string{
+			"-nostdlibinc",
+			"-isystem", filepath.Join(path, "include"),
+			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "crt"),
+			"-isystem", filepath.Join(root, "lib", "mingw-w64", "mingw-w64-headers", "defaults", "include"),
+			"-D_UCRT",
+		}
+	case "":
+		// No libc specified, nothing to add.
+		return nil
+	default:
+		// Incorrect configuration. This could be handled in a better way, but
+		// usually this will be found by developers (not by TinyGo users).
+		panic("unknown libc: " + c.Target.Libc)
+	}
+}
+
 // LDFlags returns the flags to pass to the linker. A few more flags are needed
 // (like the one for the compiler runtime), but this represents the majority of
 // the flags.

compileopts/options.go

@@ -9,7 +9,7 @@ import (
 
 var (
 	validBuildModeOptions     = []string{"default", "c-shared", "wasi-legacy"}
-	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise"}
+	validGCOptions            = []string{"none", "leaking", "conservative", "custom", "precise", "boehm"}
 	validSchedulerOptions     = []string{"none", "tasks", "asyncify"}
 	validSerialOptions        = []string{"none", "uart", "usb", "rtt"}
 	validPrintSizeOptions     = []string{"none", "short", "full", "html"}

compileopts/options_test.go

@@ -9,7 +9,7 @@ import (
 
 func TestVerifyOptions(t *testing.T) {
 
-	expectedGCError := errors.New(`invalid gc option 'incorrect': valid values are none, leaking, conservative, custom, precise`)
+	expectedGCError := errors.New(`invalid gc option 'incorrect': valid values are none, leaking, conservative, custom, precise, boehm`)
 	expectedSchedulerError := errors.New(`invalid scheduler option 'incorrect': valid values are none, tasks, asyncify`)
 	expectedPrintSizeError := errors.New(`invalid size option 'incorrect': valid values are none, short, full, html`)
 	expectedPanicStrategyError := errors.New(`invalid panic option 'incorrect': valid values are print, trap`)

compileopts/target.go

@@ -247,7 +247,6 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 		GOOS:             options.GOOS,
 		GOARCH:           options.GOARCH,
 		BuildTags:        []string{options.GOOS, options.GOARCH},
-		GC:               "precise",
 		Scheduler:        "tasks",
 		Linker:           "cc",
 		DefaultStackSize: 1024 * 64, // 64kB
@@ -356,17 +355,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			return nil, fmt.Errorf("invalid GOMIPS=%s: must be hardfloat or softfloat", options.GOMIPS)
 		}
 	case "wasm":
-		llvmarch = "wasm32"
+		return nil, fmt.Errorf("GOARCH=wasm but GOOS is unset. Please set GOOS to wasm, wasip1, or wasip2.")
-		spec.CPU = "generic"
-		spec.Features = "+bulk-memory,+mutable-globals,+nontrapping-fptoint,+sign-ext,-multivalue,-reference-types"
-		spec.BuildTags = append(spec.BuildTags, "tinygo.wasm")
-		spec.CFlags = append(spec.CFlags,
-			"-mbulk-memory",
-			"-mnontrapping-fptoint",
-			"-mno-multivalue",
-			"-mno-reference-types",
-			"-msign-ext",
-		)
 	default:
 		return nil, fmt.Errorf("unknown GOARCH=%s", options.GOARCH)
 	}
@@ -376,6 +365,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 	llvmvendor := "unknown"
 	switch options.GOOS {
 	case "darwin":
+		spec.GC = "precise"
 		platformVersion := "10.12.0"
 		if options.GOARCH == "arm64" {
 			platformVersion = "11.0.0" // first macosx platform with arm64 support
@@ -398,6 +388,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"src/runtime/runtime_unix.c",
 			"src/runtime/signal.c")
 	case "linux":
+		spec.GC = "boehm"
 		spec.Linker = "ld.lld"
 		spec.RTLib = "compiler-rt"
 		spec.Libc = "musl"
@@ -421,6 +412,7 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"src/runtime/runtime_unix.c",
 			"src/runtime/signal.c")
 	case "windows":
+		spec.GC = "precise"
 		spec.Linker = "ld.lld"
 		spec.Libc = "mingw-w64"
 		// Note: using a medium code model, low image base and no ASLR
@@ -446,23 +438,8 @@ func defaultTarget(options *Options) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	case "wasip1":
+	case "wasm", "wasip1", "wasip2":
-		spec.GC = "" // use default GC
+		return nil, fmt.Errorf("GOOS=%s but GOARCH is unset. Please set GOARCH to wasm", options.GOOS)
-		spec.Scheduler = "asyncify"
-		spec.Linker = "wasm-ld"
-		spec.RTLib = "compiler-rt"
-		spec.Libc = "wasi-libc"
-		spec.DefaultStackSize = 1024 * 64 // 64kB
-		spec.LDFlags = append(spec.LDFlags,
-			"--stack-first",
-			"--no-demangle",
-		)
-		spec.Emulator = "wasmtime run --dir={tmpDir}::/tmp {}"
-		spec.ExtraFiles = append(spec.ExtraFiles,
-			"src/runtime/asm_tinygowasm.S",
-			"src/internal/task/task_asyncify_wasm.S",
-		)
-		llvmos = "wasi"
 	default:
 		return nil, fmt.Errorf("unknown GOOS=%s", options.GOOS)
 	}

compiler/llvm.go

@@ -371,13 +371,6 @@ func (c *compilerContext) getPointerBitmap(typ llvm.Type, pos token.Pos) *big.In
 		return big.NewInt(1)
 	case llvm.StructTypeKind:
 		ptrs := big.NewInt(0)
-		if typ.StructName() == "runtime.funcValue" {
-			// Hack: the type runtime.funcValue contains an 'id' field which is
-			// of type uintptr, but before the LowerFuncValues pass it actually
-			// contains a pointer (ptrtoint) to a global. This trips up the
-			// interp package. Therefore, make the id field a pointer for now.
-			typ = c.ctx.StructType([]llvm.Type{c.dataPtrType, c.dataPtrType}, false)
-		}
 		for i, subtyp := range typ.StructElementTypes() {
 			subptrs := c.getPointerBitmap(subtyp, pos)
 			if subptrs.BitLen() == 0 {

compiler/symbol.go

@@ -446,7 +446,7 @@ func (c *compilerContext) parsePragmas(info *functionInfo, f *ssa.Function) {
 // The list of allowed types is based on this proposal:
 // https://github.com/golang/go/issues/59149
 func (c *compilerContext) checkWasmImportExport(f *ssa.Function, pragma string) {
-	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" {
+	if c.pkg.Path() == "runtime" || c.pkg.Path() == "syscall/js" || c.pkg.Path() == "syscall" || c.pkg.Path() == "crypto/internal/sysrand" {
 		// The runtime is a special case. Allow all kinds of parameters
 		// (importantly, including pointers).
 		return

goenv/version.go

@@ -10,7 +10,7 @@ import (
 
 // Version of TinyGo.
 // Update this value before release of new version of software.
-const version = "0.36.0-dev"
+const version = "0.37.0"
 
 // Return TinyGo version, either in the form 0.30.0 or as a development version
 // (like 0.30.0-dev-abcd012).

internal/wasm-tools/go.mod

@@ -1,18 +1,22 @@
-module github.com/tinygo-org/tinygo/internal/tools
+module github.com/tinygo-org/tinygo/internal/wasm-tools
 
-go 1.22.4
+go 1.23.0
 
-require github.com/bytecodealliance/wasm-tools-go v0.3.1
+require (
+	go.bytecodealliance.org v0.6.2
+	go.bytecodealliance.org/cm v0.2.2
+)
 
 require (
 	github.com/coreos/go-semver v0.3.1 // indirect
 	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
-	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
-	github.com/regclient/regclient v0.7.1 // indirect
+	github.com/regclient/regclient v0.8.2 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/tetratelabs/wazero v1.9.0 // indirect
 	github.com/ulikunitz/xz v0.5.12 // indirect
-	github.com/urfave/cli/v3 v3.0.0-alpha9.2 // indirect
+	github.com/urfave/cli/v3 v3.0.0-beta1 // indirect
-	golang.org/x/mod v0.21.0 // indirect
+	golang.org/x/mod v0.24.0 // indirect
-	golang.org/x/sys v0.26.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
 )

internal/wasm-tools/go.sum

@@ -1,5 +1,3 @@
-github.com/bytecodealliance/wasm-tools-go v0.3.1 h1:9Q9PjSzkbiVmkUvZ7nYCfJ02mcQDBalxycA3s8g7kR4=
-github.com/bytecodealliance/wasm-tools-go v0.3.1/go.mod h1:vNAQ8DAEp6xvvk+TUHah5DslLEa76f4H6e737OeaxuY=
 github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
 github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -7,16 +5,16 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 h1:UhxFibDNY/bfvqU5CAUmr9zpesgbU6SWc8/B4mflAE4=
 github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7/go.mod h1:cyGadeNEkKy96OOhEzfZl+yxihPEzKnqJwvfuSUqbZE=
-github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
-github.com/olareg/olareg v0.1.0 h1:1dXBOgPrig5N7zoXyIZVQqU0QBo6sD9pbL6UYjY75CA=
+github.com/olareg/olareg v0.1.1 h1:Ui7q93zjcoF+U9U71sgqgZWByDoZOpqHitUXEu2xV+g=
-github.com/olareg/olareg v0.1.0/go.mod h1:RBuU7JW7SoIIxZKzLRhq8sVtQeAHzCAtRrXEBx2KlM4=
+github.com/olareg/olareg v0.1.1/go.mod h1:w8NP4SWrHHtxsFaUiv1lnCnYPm4sN1seCd2h7FK/dc0=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/regclient/regclient v0.7.1 h1:qEsJrTmZd98fZKjueAbrZCSNGU+ifnr6xjlSAs3WOPs=
+github.com/regclient/regclient v0.8.2 h1:23BQ3jWgKYHHIXUhp/S9laVJDHDoOQaQCzXMJ4undVE=
-github.com/regclient/regclient v0.7.1/go.mod h1:+w/BFtJuw0h0nzIw/z2+1FuA2/dVXBzDq4rYmziJpMc=
+github.com/regclient/regclient v0.8.2/go.mod h1:uGyetv0o6VLyRDjtfeBqp/QBwRLJ3Hcn07/+8QbhNcM=
 github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
 github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
@@ -25,19 +23,25 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tetratelabs/wazero v1.9.0 h1:IcZ56OuxrtaEz8UYNRHBrUa9bYeX9oVY93KspZZBf/I=
+github.com/tetratelabs/wazero v1.9.0/go.mod h1:TSbcXCfFP0L2FGkRPxHphadXPjo1T6W+CseNNY7EkjM=
 github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
 github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
-github.com/urfave/cli/v3 v3.0.0-alpha9.2 h1:CL8llQj3dGRLVQQzHxS+ZYRLanOuhyK1fXgLKD+qV+Y=
+github.com/urfave/cli/v3 v3.0.0-beta1 h1:6DTaaUarcM0wX7qj5Hcvs+5Dm3dyUTBbEwIWAjcw9Zg=
-github.com/urfave/cli/v3 v3.0.0-alpha9.2/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
+github.com/urfave/cli/v3 v3.0.0-beta1/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
-golang.org/x/mod v0.21.0 h1:vvrHzRwRfVKSiLrG+d4FMl/Qi4ukBCE6kZlTUkDYRT0=
+go.bytecodealliance.org v0.6.2 h1:Jy4u5DVmSkXgsnwojBhJ+AD/YsJsR3VzVnxF0xRCqTQ=
-golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+go.bytecodealliance.org v0.6.2/go.mod h1:gqjTJm0y9NSksG4py/lSjIQ/SNuIlOQ+hCIEPQwtJgA=
-golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
+go.bytecodealliance.org/cm v0.2.2 h1:M9iHS6qs884mbQbIjtLX1OifgyPG9DuMs2iwz8G4WQA=
-golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+go.bytecodealliance.org/cm v0.2.2/go.mod h1:JD5vtVNZv7sBoQQkvBvAAVKJPhR/bqBH7yYXTItMfZI=
+golang.org/x/mod v0.24.0 h1:ZfthKaKaT4NrhGVZHO1/WDTwGES4De8KtWO0SIbNJMU=
+golang.org/x/mod v0.24.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
+golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
+golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
-golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
+golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
-golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
+golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/wasm-tools/tools.go

@@ -5,7 +5,8 @@
 package tools
 
 import (
-	_ "github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go"
+	_ "go.bytecodealliance.org/cm"
+	_ "go.bytecodealliance.org/cmd/wit-bindgen-go"
 )
 
-//go:generate go install github.com/bytecodealliance/wasm-tools-go/cmd/wit-bindgen-go
+//go:generate go install go.bytecodealliance.org/cmd/wit-bindgen-go

interp/memory.go

@@ -824,19 +824,6 @@ func (v rawValue) rawLLVMValue(mem *memoryView) (llvm.Value, error) {
 			if err != nil {
 				return llvm.Value{}, err
 			}
-			if !field.IsAGlobalVariable().IsNil() {
-				elementType := field.GlobalValueType()
-				if elementType.TypeKind() == llvm.StructTypeKind {
-					// There are some special pointer types that should be used
-					// as a ptrtoint, so that they can be used in certain
-					// optimizations.
-					name := elementType.StructName()
-					if name == "runtime.funcValueWithSignature" {
-						uintptrType := ctx.IntType(int(mem.r.pointerSize) * 8)
-						field = llvm.ConstPtrToInt(field, uintptrType)
-					}
-				}
-			}
 			structFields = append(structFields, field)
 			i += mem.r.pointerSize
 			continue

loader/goroot.go

@@ -269,6 +269,8 @@ func pathsToOverride(goMinor int, needsSyscallPackage bool) map[string]bool {
 
 	if needsSyscallPackage {
 		paths["syscall/"] = true // include syscall/js
+		paths["internal/syscall/"] = true
+		paths["internal/syscall/unix/"] = false
 	}
 	return paths
 }

main.go

@@ -1684,8 +1684,24 @@ func main() {
 			usage(command)
 			os.Exit(1)
 		}
-		if options.Target == "" && filepath.Ext(outpath) == ".wasm" {
+		if options.Target == "" {
-			options.Target = "wasm"
+			switch {
+			case options.GOARCH == "wasm":
+				switch options.GOOS {
+				case "js":
+					options.Target = "wasm"
+				case "wasip1":
+					options.Target = "wasip1"
+				case "wasip2":
+					options.Target = "wasip2"
+				default:
+					fmt.Fprintln(os.Stderr, "GOARCH=wasm but GOOS is not set correctly. Please set GOOS to wasm, wasip1, or wasip2.")
+					os.Exit(1)
+				}
+			case filepath.Ext(outpath) == ".wasm":
+				fmt.Fprintln(os.Stderr, "you appear to want to build a wasm file, but have not specified either a target flag, or the GOARCH/GOOS to use.")
+				os.Exit(1)
+			}
 		}
 
 		err := Build(pkgName, outpath, options)

src/crypto/rand/rand_baremetal.go

@@ -1,4 +1,4 @@
-//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey
+//go:build nrf || (stm32 && !(stm32f103 || stm32l0x1)) || (sam && atsamd51) || (sam && atsame5x) || esp32c3 || tkey || (tinygo.riscv32 && virt)
 
 // If you update the above build constraint, you'll probably also need to update
 // src/runtime/rand_hwrng.go.

src/examples/bench-goro/bench.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"machine"
+	"runtime"
+	"sync"
+	"time"
+)
+
+const N = 500000
+const Ngoro = 4
+
+func main() {
+	start := time.Now()
+	var wg sync.WaitGroup
+	wg.Add(Ngoro)
+	for i := 0; i < Ngoro; i++ {
+		go adder(&wg, N)
+	}
+	wg.Wait()
+	elapsed := time.Since(start)
+	goroutineCtxSwitchOverhead := (elapsed / (Ngoro * N)).String()
+
+	elapsedstr := elapsed.String()
+	machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	for {
+		println("bench:", elapsedstr, "goroutine ctx switch:", goroutineCtxSwitchOverhead)
+		machine.LED.High()
+		time.Sleep(elapsed)
+		machine.LED.Low()
+		time.Sleep(elapsed)
+	}
+}
+
+func adder(wg *sync.WaitGroup, num int) {
+	for i := 0; i < num; i++ {
+		runtime.Gosched()
+	}
+	wg.Done()
+}

src/internal/cm/case.go

@@ -0,0 +1,51 @@
+package cm
+
+// CaseUnmarshaler returns an function that can unmarshal text into
+// [variant] or [enum] case T.
+//
+// [enum]: https://component-model.bytecodealliance.org/design/wit.html#enums
+// [variant]: https://component-model.bytecodealliance.org/design/wit.html#variants
+func CaseUnmarshaler[T ~uint8 | ~uint16 | ~uint32](cases []string) func(v *T, text []byte) error {
+	if len(cases) <= linearScanThreshold {
+		return func(v *T, text []byte) error {
+			if len(text) == 0 {
+				return &emptyTextError{}
+			}
+			s := string(text)
+			for i := 0; i < len(cases); i++ {
+				if cases[i] == s {
+					*v = T(i)
+					return nil
+				}
+			}
+			return &noMatchingCaseError{}
+		}
+	}
+
+	m := make(map[string]T, len(cases))
+	for i, v := range cases {
+		m[v] = T(i)
+	}
+
+	return func(v *T, text []byte) error {
+		if len(text) == 0 {
+			return &emptyTextError{}
+		}
+		c, ok := m[string(text)]
+		if !ok {
+			return &noMatchingCaseError{}
+		}
+		*v = c
+		return nil
+	}
+}
+
+const linearScanThreshold = 16
+
+type emptyTextError struct{}
+
+func (*emptyTextError) Error() string { return "empty text" }
+
+type noMatchingCaseError struct{}
+
+func (*noMatchingCaseError) Error() string { return "no matching case" }

src/internal/cm/docs.go

@@ -1,4 +1,4 @@
-// Package cm contains types and functions for interfacing with the WebAssembly Component Model.
+// Package cm provides types and functions for interfacing with the WebAssembly Component Model.
 //
 // The types in this package (such as [List], [Option], [Result], and [Variant]) are designed to match the memory layout
 // of [Component Model] types as specified in the [Canonical ABI].

src/internal/cm/empty.s

@@ -0,0 +1,3 @@
+// This file exists for testing this package without WebAssembly,
+// allowing empty function bodies with a //go:wasmimport directive.
+// See https://pkg.go.dev/cmd/compile for more information.

src/internal/cm/error.go

@@ -0,0 +1,40 @@
+package cm
+
+import "unsafe"
+
+// ErrorContext represents the Component Model [error-context] type,
+// an immutable, non-deterministic, host-defined value meant to aid in debugging.
+//
+// [error-context]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#error-context-type
+type ErrorContext struct {
+	_ HostLayout
+	errorContext
+}
+
+type errorContext uint32
+
+// Error implements the [error] interface. It returns the debug message associated with err.
+func (err errorContext) Error() string {
+	return err.DebugMessage()
+}
+
+// String implements [fmt.Stringer].
+func (err errorContext) String() string {
+	return err.DebugMessage()
+}
+
+// DebugMessage represents the Canonical ABI [error-context.debug-message] function.
+//
+// [error-context.debug-message]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#error-contextdebug-message
+func (err errorContext) DebugMessage() string {
+	var s string
+	wasmimport_errorContextDebugMessage(err, unsafe.Pointer(&s))
+	return s
+}
+
+// Drop represents the Canonical ABI [error-context.drop] function.
+//
+// [error-context.drop]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#error-contextdrop
+func (err errorContext) Drop() {
+	wasmimport_errorContextDrop(err)
+}

src/internal/cm/error.wasm.go

@@ -0,0 +1,13 @@
+package cm
+
+import "unsafe"
+
+// msg uses unsafe.Pointer for compatibility with go1.23 and lower.
+//
+//go:wasmimport canon error-context.debug-message
+//go:noescape
+func wasmimport_errorContextDebugMessage(err errorContext, msg unsafe.Pointer)
+
+//go:wasmimport canon error-context.drop
+//go:noescape
+func wasmimport_errorContextDrop(err errorContext)

src/internal/cm/future.go

@@ -0,0 +1,15 @@
+package cm
+
+// Future represents the Component Model [future] type.
+// A future is a special case of stream. In non-error cases,
+// a future delivers exactly one value before being automatically closed.
+//
+// [future]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#asynchronous-value-types
+type Future[T any] struct {
+	_ HostLayout
+	future[T]
+}
+
+type future[T any] uint32
+
+// TODO: implement methods on type future

src/internal/cm/list.go

@@ -1,6 +1,8 @@
 package cm
 
-import "unsafe"
+import (
+	"unsafe"
+)
 
 // List represents a Component Model list.
 // The binary representation of list<T> is similar to a Go slice minus the cap field.

src/internal/cm/stream.go

@@ -0,0 +1,15 @@
+package cm
+
+// Stream represents the Component Model [stream] type.
+// A stream is a special case of stream. In non-error cases,
+// a stream delivers exactly one value before being automatically closed.
+//
+// [stream]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/Explainer.md#asynchronous-value-types
+type Stream[T any] struct {
+	_ HostLayout
+	stream[T]
+}
+
+type stream[T any] uint32
+
+// TODO: implement methods on type stream

src/internal/cm/variant.go

@@ -3,10 +3,9 @@ package cm
 import "unsafe"
 
 // Discriminant is the set of types that can represent the tag or discriminator of a variant.
-// Use bool for 2-case variant types, result<T>, or option<T> types, uint8 where there are 256 or
+// Use uint8 where there are 256 or fewer cases, uint16 for up to 65,536 cases, or uint32 for anything greater.
-// fewer cases, uint16 for up to 65,536 cases, or uint32 for anything greater.
 type Discriminant interface {
-	bool | uint8 | uint16 | uint32
+	uint8 | uint16 | uint32
 }
 
 // Variant represents a loosely-typed Component Model variant.

src/internal/reflectlite/deepequal.go

@@ -0,0 +1,196 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Deep equality test via reflection
+
+package reflectlite
+
+import "unsafe"
+
+// During deepValueEqual, must keep track of checks that are
+// in progress. The comparison algorithm assumes that all
+// checks in progress are true when it reencounters them.
+// Visited comparisons are stored in a map indexed by visit.
+type visit struct {
+	a1  unsafe.Pointer
+	a2  unsafe.Pointer
+	typ *RawType
+}
+
+// Tests for deep equality using reflected types. The map argument tracks
+// comparisons that have already been seen, which allows short circuiting on
+// recursive types.
+func deepValueEqual(v1, v2 Value, visited map[visit]struct{}) bool {
+	if !v1.IsValid() || !v2.IsValid() {
+		return v1.IsValid() == v2.IsValid()
+	}
+	if v1.typecode != v2.typecode {
+		return false
+	}
+
+	// We want to avoid putting more in the visited map than we need to.
+	// For any possible reference cycle that might be encountered,
+	// hard(v1, v2) needs to return true for at least one of the types in the cycle,
+	// and it's safe and valid to get Value's internal pointer.
+	hard := func(v1, v2 Value) bool {
+		switch v1.Kind() {
+		case Map, Slice, Ptr, Interface:
+			// Nil pointers cannot be cyclic. Avoid putting them in the visited map.
+			return !v1.IsNil() && !v2.IsNil()
+		}
+		return false
+	}
+
+	if hard(v1, v2) {
+		addr1 := v1.pointer()
+		addr2 := v2.pointer()
+		if uintptr(addr1) > uintptr(addr2) {
+			// Canonicalize order to reduce number of entries in visited.
+			// Assumes non-moving garbage collector.
+			addr1, addr2 = addr2, addr1
+		}
+
+		// Short circuit if references are already seen.
+		v := visit{addr1, addr2, v1.typecode}
+		if _, ok := visited[v]; ok {
+			return true
+		}
+
+		// Remember for later.
+		visited[v] = struct{}{}
+	}
+
+	switch v1.Kind() {
+	case Array:
+		for i := 0; i < v1.Len(); i++ {
+			if !deepValueEqual(v1.Index(i), v2.Index(i), visited) {
+				return false
+			}
+		}
+		return true
+	case Slice:
+		if v1.IsNil() != v2.IsNil() {
+			return false
+		}
+		if v1.Len() != v2.Len() {
+			return false
+		}
+		if v1.UnsafePointer() == v2.UnsafePointer() {
+			return true
+		}
+		for i := 0; i < v1.Len(); i++ {
+			if !deepValueEqual(v1.Index(i), v2.Index(i), visited) {
+				return false
+			}
+		}
+		return true
+	case Interface:
+		if v1.IsNil() || v2.IsNil() {
+			return v1.IsNil() == v2.IsNil()
+		}
+		return deepValueEqual(v1.Elem(), v2.Elem(), visited)
+	case Ptr:
+		if v1.UnsafePointer() == v2.UnsafePointer() {
+			return true
+		}
+		return deepValueEqual(v1.Elem(), v2.Elem(), visited)
+	case Struct:
+		for i, n := 0, v1.NumField(); i < n; i++ {
+			if !deepValueEqual(v1.Field(i), v2.Field(i), visited) {
+				return false
+			}
+		}
+		return true
+	case Map:
+		if v1.IsNil() != v2.IsNil() {
+			return false
+		}
+		if v1.Len() != v2.Len() {
+			return false
+		}
+		if v1.UnsafePointer() == v2.UnsafePointer() {
+			return true
+		}
+		for _, k := range v1.MapKeys() {
+			val1 := v1.MapIndex(k)
+			val2 := v2.MapIndex(k)
+			if !val1.IsValid() || !val2.IsValid() || !deepValueEqual(val1, val2, visited) {
+				return false
+			}
+		}
+		return true
+	case Func:
+		if v1.IsNil() && v2.IsNil() {
+			return true
+		}
+		// Can't do better than this:
+		return false
+	default:
+		// Normal equality suffices
+		return valueInterfaceUnsafe(v1) == valueInterfaceUnsafe(v2)
+	}
+}
+
+// DeepEqual reports whether x and y are “deeply equal”, defined as follows.
+// Two values of identical type are deeply equal if one of the following cases applies.
+// Values of distinct types are never deeply equal.
+//
+// Array values are deeply equal when their corresponding elements are deeply equal.
+//
+// Struct values are deeply equal if their corresponding fields,
+// both exported and unexported, are deeply equal.
+//
+// Func values are deeply equal if both are nil; otherwise they are not deeply equal.
+//
+// Interface values are deeply equal if they hold deeply equal concrete values.
+//
+// Map values are deeply equal when all of the following are true:
+// they are both nil or both non-nil, they have the same length,
+// and either they are the same map object or their corresponding keys
+// (matched using Go equality) map to deeply equal values.
+//
+// Pointer values are deeply equal if they are equal using Go's == operator
+// or if they point to deeply equal values.
+//
+// Slice values are deeply equal when all of the following are true:
+// they are both nil or both non-nil, they have the same length,
+// and either they point to the same initial entry of the same underlying array
+// (that is, &x[0] == &y[0]) or their corresponding elements (up to length) are deeply equal.
+// Note that a non-nil empty slice and a nil slice (for example, []byte{} and []byte(nil))
+// are not deeply equal.
+//
+// Other values - numbers, bools, strings, and channels - are deeply equal
+// if they are equal using Go's == operator.
+//
+// In general DeepEqual is a recursive relaxation of Go's == operator.
+// However, this idea is impossible to implement without some inconsistency.
+// Specifically, it is possible for a value to be unequal to itself,
+// either because it is of func type (uncomparable in general)
+// or because it is a floating-point NaN value (not equal to itself in floating-point comparison),
+// or because it is an array, struct, or interface containing
+// such a value.
+// On the other hand, pointer values are always equal to themselves,
+// even if they point at or contain such problematic values,
+// because they compare equal using Go's == operator, and that
+// is a sufficient condition to be deeply equal, regardless of content.
+// DeepEqual has been defined so that the same short-cut applies
+// to slices and maps: if x and y are the same slice or the same map,
+// they are deeply equal regardless of content.
+//
+// As DeepEqual traverses the data values it may find a cycle. The
+// second and subsequent times that DeepEqual compares two pointer
+// values that have been compared before, it treats the values as
+// equal rather than examining the values to which they point.
+// This ensures that DeepEqual terminates.
+func DeepEqual(x, y interface{}) bool {
+	if x == nil || y == nil {
+		return x == y
+	}
+	v1 := ValueOf(x)
+	v2 := ValueOf(y)
+	if v1.typecode != v2.typecode {
+		return false
+	}
+	return deepValueEqual(v1, v2, make(map[visit]struct{}))
+}

src/internal/reflectlite/endian_big.go

@@ -1,6 +1,6 @@
 //go:build mips
 
-package reflect
+package reflectlite
 
 import "unsafe"
 

src/internal/reflectlite/endian_little.go

@@ -1,6 +1,6 @@
 //go:build !mips
 
-package reflect
+package reflectlite
 
 import "unsafe"
 

src/internal/reflectlite/reflect.go

@@ -1,51 +0,0 @@
-package reflectlite
-
-import "reflect"
-
-func Swapper(slice interface{}) func(i, j int) {
-	return reflect.Swapper(slice)
-}
-
-type Kind = reflect.Kind
-type Type = reflect.Type
-type Value = reflect.Value
-
-const (
-	Invalid       Kind = reflect.Invalid
-	Bool          Kind = reflect.Bool
-	Int           Kind = reflect.Int
-	Int8          Kind = reflect.Int8
-	Int16         Kind = reflect.Int16
-	Int32         Kind = reflect.Int32
-	Int64         Kind = reflect.Int64
-	Uint          Kind = reflect.Uint
-	Uint8         Kind = reflect.Uint8
-	Uint16        Kind = reflect.Uint16
-	Uint32        Kind = reflect.Uint32
-	Uint64        Kind = reflect.Uint64
-	Uintptr       Kind = reflect.Uintptr
-	Float32       Kind = reflect.Float32
-	Float64       Kind = reflect.Float64
-	Complex64     Kind = reflect.Complex64
-	Complex128    Kind = reflect.Complex128
-	Array         Kind = reflect.Array
-	Chan          Kind = reflect.Chan
-	Func          Kind = reflect.Func
-	Interface     Kind = reflect.Interface
-	Map           Kind = reflect.Map
-	Ptr           Kind = reflect.Ptr
-	Slice         Kind = reflect.Slice
-	String        Kind = reflect.String
-	Struct        Kind = reflect.Struct
-	UnsafePointer Kind = reflect.UnsafePointer
-)
-
-func ValueOf(i interface{}) reflect.Value {
-	return reflect.ValueOf(i)
-}
-
-func TypeOf(i interface{}) reflect.Type {
-	return reflect.TypeOf(i)
-}
-
-type ValueError = reflect.ValueError

src/internal/reflectlite/strconv.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 reflect
+package reflectlite
 
 import (
 	"unicode/utf8"

src/internal/reflectlite/swapper.go

@@ -0,0 +1,40 @@
+package reflectlite
+
+import "unsafe"
+
+// Some of code here has been copied from the Go sources:
+//   https://github.com/golang/go/blob/go1.15.2/src/reflect/swapper.go
+// It has the following copyright note:
+//
+// 		Copyright 2016 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.
+
+func Swapper(slice interface{}) func(i, j int) {
+	v := ValueOf(slice)
+	if v.Kind() != Slice {
+		panic(&ValueError{Method: "Swapper"})
+	}
+
+	// Just return Nop func if nothing to swap.
+	if v.Len() < 2 {
+		return func(i, j int) {}
+	}
+
+	typ := v.typecode.Elem()
+	size := typ.Size()
+
+	header := (*sliceHeader)(v.value)
+	tmp := unsafe.Pointer(&make([]byte, size)[0])
+
+	return func(i, j int) {
+		if uint(i) >= uint(header.len) || uint(j) >= uint(header.len) {
+			panic("reflect: slice index out of range")
+		}
+		val1 := unsafe.Add(header.data, uintptr(i)*size)
+		val2 := unsafe.Add(header.data, uintptr(j)*size)
+		memcpy(tmp, val1, size)
+		memcpy(val1, val2, size)
+		memcpy(val2, tmp, size)
+	}
+}

src/internal/reflectlite/visiblefields.go

@@ -0,0 +1,105 @@
+// 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 reflectlite
+
+// VisibleFields returns all the visible fields in t, which must be a
+// struct type. A field is defined as visible if it's accessible
+// directly with a FieldByName call. The returned fields include fields
+// inside anonymous struct members and unexported fields. They follow
+// the same order found in the struct, with anonymous fields followed
+// immediately by their promoted fields.
+//
+// For each element e of the returned slice, the corresponding field
+// can be retrieved from a value v of type t by calling v.FieldByIndex(e.Index).
+func VisibleFields(t Type) []StructField {
+	if t == nil {
+		panic("reflect: VisibleFields(nil)")
+	}
+	if t.Kind() != Struct {
+		panic("reflect.VisibleFields of non-struct type")
+	}
+	w := &visibleFieldsWalker{
+		byName:   make(map[string]int),
+		visiting: make(map[Type]bool),
+		fields:   make([]StructField, 0, t.NumField()),
+		index:    make([]int, 0, 2),
+	}
+	w.walk(t)
+	// Remove all the fields that have been hidden.
+	// Use an in-place removal that avoids copying in
+	// the common case that there are no hidden fields.
+	j := 0
+	for i := range w.fields {
+		f := &w.fields[i]
+		if f.Name == "" {
+			continue
+		}
+		if i != j {
+			// A field has been removed. We need to shuffle
+			// all the subsequent elements up.
+			w.fields[j] = *f
+		}
+		j++
+	}
+	return w.fields[:j]
+}
+
+type visibleFieldsWalker struct {
+	byName   map[string]int
+	visiting map[Type]bool
+	fields   []StructField
+	index    []int
+}
+
+// walk walks all the fields in the struct type t, visiting
+// fields in index preorder and appending them to w.fields
+// (this maintains the required ordering).
+// Fields that have been overridden have their
+// Name field cleared.
+func (w *visibleFieldsWalker) walk(t Type) {
+	if w.visiting[t] {
+		return
+	}
+	w.visiting[t] = true
+	for i := 0; i < t.NumField(); i++ {
+		f := t.Field(i)
+		w.index = append(w.index, i)
+		add := true
+		if oldIndex, ok := w.byName[f.Name]; ok {
+			old := &w.fields[oldIndex]
+			if len(w.index) == len(old.Index) {
+				// Fields with the same name at the same depth
+				// cancel one another out. Set the field name
+				// to empty to signify that has happened, and
+				// there's no need to add this field.
+				old.Name = ""
+				add = false
+			} else if len(w.index) < len(old.Index) {
+				// The old field loses because it's deeper than the new one.
+				old.Name = ""
+			} else {
+				// The old field wins because it's shallower than the new one.
+				add = false
+			}
+		}
+		if add {
+			// Copy the index so that it's not overwritten
+			// by the other appends.
+			f.Index = append([]int(nil), w.index...)
+			w.byName[f.Name] = len(w.fields)
+			w.fields = append(w.fields, f)
+		}
+		if f.Anonymous {
+			if f.Type.Kind() == Pointer {
+				f.Type = f.Type.Elem()
+			}
+			if f.Type.Kind() == Struct {
+				w.walk(f.Type)
+			}
+		}
+		w.index = w.index[:len(w.index)-1]
+	}
+	delete(w.visiting, t)
+}

src/internal/syscall/unix/constants.go

@@ -0,0 +1,7 @@
+package unix
+
+const (
+	R_OK = 0x4
+	W_OK = 0x2
+	X_OK = 0x1
+)

src/internal/syscall/unix/eaccess.go

@@ -0,0 +1,10 @@
+package unix
+
+import "syscall"
+
+func Eaccess(path string, mode uint32) error {
+	// We don't support this syscall on baremetal or wasm.
+	// Callers are generally able to deal with this since unix.Eaccess also
+	// isn't available on Android.
+	return syscall.ENOSYS
+}

src/internal/syscall/unix/getrandom.go

@@ -0,0 +1,12 @@
+package unix
+
+type GetRandomFlag uintptr
+
+const (
+	GRND_NONBLOCK GetRandomFlag = 0x0001
+	GRND_RANDOM   GetRandomFlag = 0x0002
+)
+
+func GetRandom(p []byte, flags GetRandomFlag) (n int, err error) {
+	panic("todo: unix.GetRandom")
+}

src/internal/wasi/cli/v0.2.0/exit/exit.wit.go

@@ -15,7 +15,7 @@ import (
 //
 //go:nosplit
 func Exit(status cm.BoolResult) {
-	status0 := cm.BoolToU32(status)
+	status0 := (uint32)(cm.BoolToU32(status))
 	wasmimport_Exit((uint32)(status0))
 	return
 }

src/internal/wasi/cli/v0.2.0/run/run.wasm.go

@@ -12,6 +12,6 @@ import (
 //export wasi:cli/run@0.2.0#run
 func wasmexport_Run() (result0 uint32) {
 	result := Exports.Run()
-	result0 = cm.BoolToU32(result)
+	result0 = (uint32)(cm.BoolToU32(result))
 	return
 }

src/internal/wasi/clocks/v0.2.0/wall-clock/wall-clock.wit.go

@@ -31,9 +31,9 @@ import (
 //		nanoseconds: u32,
 //	}
 type DateTime struct {
-	_           cm.HostLayout
+	_           cm.HostLayout `json:"-"`
-	Seconds     uint64
+	Seconds     uint64        `json:"seconds"`
-	Nanoseconds uint32
+	Nanoseconds uint32        `json:"nanoseconds"`
 }
 
 // Now represents the imported function "now".

src/internal/wasi/filesystem/v0.2.0/types/abi.go

@@ -30,7 +30,7 @@ func lower_NewTimestamp(v NewTimestamp) (f0 uint32, f1 uint64, f2 uint32) {
 	f0 = (uint32)(v.Tag())
 	switch f0 {
 	case 2: // timestamp
-		v1, v2 := lower_DateTime(*v.Timestamp())
+		v1, v2 := lower_DateTime(*cm.Case[DateTime](&v, 2))
 		f1 = (uint64)(v1)
 		f2 = (uint32)(v2)
 	}

src/internal/wasi/filesystem/v0.2.0/types/types.wit.go

@@ -106,7 +106,7 @@ const (
 	DescriptorTypeSocket
 )
 
-var stringsDescriptorType = [8]string{
+var _DescriptorTypeStrings = [8]string{
 	"unknown",
 	"block-device",
 	"character-device",
@@ -119,9 +119,22 @@ var stringsDescriptorType = [8]string{
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e DescriptorType) String() string {
-	return stringsDescriptorType[e]
+	return _DescriptorTypeStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e DescriptorType) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *DescriptorType) UnmarshalText(text []byte) error {
+	return _DescriptorTypeUnmarshalCase(e, text)
+}
+
+var _DescriptorTypeUnmarshalCase = cm.CaseUnmarshaler[DescriptorType](_DescriptorTypeStrings[:])
+
 // DescriptorFlags represents the flags "wasi:filesystem/types@0.2.0#descriptor-flags".
 //
 // Descriptor flags.
@@ -246,34 +259,34 @@ type LinkCount uint64
 //		status-change-timestamp: option<datetime>,
 //	}
 type DescriptorStat struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// File type.
-	Type DescriptorType
+	Type DescriptorType `json:"type"`
 
 	// Number of hard links to the file.
-	LinkCount LinkCount
+	LinkCount LinkCount `json:"link-count"`
 
 	// For regular files, the file size in bytes. For symbolic links, the
 	// length in bytes of the pathname contained in the symbolic link.
-	Size FileSize
+	Size FileSize `json:"size"`
 
 	// Last data access timestamp.
 	//
 	// If the `option` is none, the platform doesn't maintain an access
 	// timestamp for this file.
-	DataAccessTimestamp cm.Option[DateTime]
+	DataAccessTimestamp cm.Option[DateTime] `json:"data-access-timestamp"`
 
 	// Last data modification timestamp.
 	//
 	// If the `option` is none, the platform doesn't maintain a
 	// modification timestamp for this file.
-	DataModificationTimestamp cm.Option[DateTime]
+	DataModificationTimestamp cm.Option[DateTime] `json:"data-modification-timestamp"`
 
 	// Last file status-change timestamp.
 	//
 	// If the `option` is none, the platform doesn't maintain a
 	// status-change timestamp for this file.
-	StatusChangeTimestamp cm.Option[DateTime]
+	StatusChangeTimestamp cm.Option[DateTime] `json:"status-change-timestamp"`
 }
 
 // NewTimestamp represents the variant "wasi:filesystem/types@0.2.0#new-timestamp".
@@ -326,7 +339,7 @@ func (self *NewTimestamp) Timestamp() *DateTime {
 	return cm.Case[DateTime](self, 2)
 }
 
-var stringsNewTimestamp = [3]string{
+var _NewTimestampStrings = [3]string{
 	"no-change",
 	"now",
 	"timestamp",
@@ -334,7 +347,7 @@ var stringsNewTimestamp = [3]string{
 
 // String implements [fmt.Stringer], returning the variant case name of v.
 func (v NewTimestamp) String() string {
-	return stringsNewTimestamp[v.Tag()]
+	return _NewTimestampStrings[v.Tag()]
 }
 
 // DirectoryEntry represents the record "wasi:filesystem/types@0.2.0#directory-entry".
@@ -346,12 +359,12 @@ func (v NewTimestamp) String() string {
 //		name: string,
 //	}
 type DirectoryEntry struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// The type of the file referred to by this directory entry.
-	Type DescriptorType
+	Type DescriptorType `json:"type"`
 
 	// The name of the object.
-	Name string
+	Name string `json:"name"`
 }
 
 // ErrorCode represents the enum "wasi:filesystem/types@0.2.0#error-code".
@@ -516,7 +529,7 @@ const (
 	ErrorCodeCrossDevice
 )
 
-var stringsErrorCode = [37]string{
+var _ErrorCodeStrings = [37]string{
 	"access",
 	"would-block",
 	"already",
@@ -558,9 +571,22 @@ var stringsErrorCode = [37]string{
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e ErrorCode) String() string {
-	return stringsErrorCode[e]
+	return _ErrorCodeStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e ErrorCode) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *ErrorCode) UnmarshalText(text []byte) error {
+	return _ErrorCodeUnmarshalCase(e, text)
+}
+
+var _ErrorCodeUnmarshalCase = cm.CaseUnmarshaler[ErrorCode](_ErrorCodeStrings[:])
+
 // Advice represents the enum "wasi:filesystem/types@0.2.0#advice".
 //
 // File or memory access pattern advisory information.
@@ -601,7 +627,7 @@ const (
 	AdviceNoReuse
 )
 
-var stringsAdvice = [6]string{
+var _AdviceStrings = [6]string{
 	"normal",
 	"sequential",
 	"random",
@@ -612,9 +638,22 @@ var stringsAdvice = [6]string{
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e Advice) String() string {
-	return stringsAdvice[e]
+	return _AdviceStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e Advice) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *Advice) UnmarshalText(text []byte) error {
+	return _AdviceUnmarshalCase(e, text)
+}
+
+var _AdviceUnmarshalCase = cm.CaseUnmarshaler[Advice](_AdviceStrings[:])
+
 // MetadataHashValue represents the record "wasi:filesystem/types@0.2.0#metadata-hash-value".
 //
 // A 128-bit hash value, split into parts because wasm doesn't have a
@@ -625,12 +664,12 @@ func (e Advice) String() string {
 //		upper: u64,
 //	}
 type MetadataHashValue struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// 64 bits of a 128-bit hash value.
-	Lower uint64
+	Lower uint64 `json:"lower"`
 
 	// Another 64 bits of a 128-bit hash value.
-	Upper uint64
+	Upper uint64 `json:"upper"`
 }
 
 // Descriptor represents the imported resource "wasi:filesystem/types@0.2.0#descriptor".
@@ -761,7 +800,7 @@ func (self Descriptor) IsSameObject(other Descriptor) (result bool) {
 	self0 := cm.Reinterpret[uint32](self)
 	other0 := cm.Reinterpret[uint32](other)
 	result0 := wasmimport_DescriptorIsSameObject((uint32)(self0), (uint32)(other0))
-	result = cm.U32ToBool((uint32)(result0))
+	result = (bool)(cm.U32ToBool((uint32)(result0)))
 	return
 }
 

src/internal/wasi/io/v0.2.0/poll/poll.wit.go

@@ -57,7 +57,7 @@ func (self Pollable) Block() {
 func (self Pollable) Ready() (result bool) {
 	self0 := cm.Reinterpret[uint32](self)
 	result0 := wasmimport_PollableReady((uint32)(self0))
-	result = cm.U32ToBool((uint32)(result0))
+	result = (bool)(cm.U32ToBool((uint32)(result0)))
 	return
 }
 

src/internal/wasi/io/v0.2.0/streams/abi.go

@@ -1,12 +0,0 @@
-// Code generated by wit-bindgen-go. DO NOT EDIT.
-
-package streams
-
-import (
-	"unsafe"
-)
-
-// StreamErrorShape is used for storage in variant or result types.
-type StreamErrorShape struct {
-	shape [unsafe.Sizeof(StreamError{})]byte
-}

src/internal/wasi/io/v0.2.0/streams/streams.wit.go

@@ -64,14 +64,14 @@ func (self *StreamError) Closed() bool {
 	return self.Tag() == 1
 }
 
-var stringsStreamError = [2]string{
+var _StreamErrorStrings = [2]string{
 	"last-operation-failed",
 	"closed",
 }
 
 // String implements [fmt.Stringer], returning the variant case name of v.
 func (v StreamError) String() string {
-	return stringsStreamError[v.Tag()]
+	return _StreamErrorStrings[v.Tag()]
 }
 
 // InputStream represents the imported resource "wasi:io/streams@0.2.0#input-stream".
@@ -273,13 +273,13 @@ func (self OutputStream) BlockingSplice(src InputStream, len_ uint64) (result cm
 //
 //	let pollable = this.subscribe();
 //	while !contents.is_empty() {
-//	// Wait for the stream to become writable
+//	    // Wait for the stream to become writable
-//	pollable.block();
+//	    pollable.block();
-//	let Ok(n) = this.check-write(); // eliding error handling
+//	    let Ok(n) = this.check-write(); // eliding error handling
-//	let len = min(n, contents.len());
+//	    let len = min(n, contents.len());
-//	let (chunk, rest) = contents.split_at(len);
+//	    let (chunk, rest) = contents.split_at(len);
-//	this.write(chunk  );            // eliding error handling
+//	    this.write(chunk  );            // eliding error handling
-//	contents = rest;
+//	    contents = rest;
 //	}
 //	this.flush();
 //	// Wait for completion of `flush`
@@ -309,12 +309,12 @@ func (self OutputStream) BlockingWriteAndFlush(contents cm.List[uint8]) (result
 //
 //	let pollable = this.subscribe();
 //	while num_zeroes != 0 {
-//	// Wait for the stream to become writable
+//	    // Wait for the stream to become writable
-//	pollable.block();
+//	    pollable.block();
-//	let Ok(n) = this.check-write(); // eliding error handling
+//	    let Ok(n) = this.check-write(); // eliding error handling
-//	let len = min(n, num_zeroes);
+//	    let len = min(n, num_zeroes);
-//	this.write-zeroes(len);         // eliding error handling
+//	    this.write-zeroes(len);         // eliding error handling
-//	num_zeroes -= len;
+//	    num_zeroes -= len;
 //	}
 //	this.flush();
 //	// Wait for completion of `flush`

src/internal/wasi/sockets/v0.2.0/network/network.wit.go

@@ -153,7 +153,7 @@ const (
 	ErrorCodePermanentResolverFailure
 )
 
-var stringsErrorCode = [21]string{
+var _ErrorCodeStrings = [21]string{
 	"unknown",
 	"access-denied",
 	"not-supported",
@@ -179,9 +179,22 @@ var stringsErrorCode = [21]string{
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e ErrorCode) String() string {
-	return stringsErrorCode[e]
+	return _ErrorCodeStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e ErrorCode) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *ErrorCode) UnmarshalText(text []byte) error {
+	return _ErrorCodeUnmarshalCase(e, text)
+}
+
+var _ErrorCodeUnmarshalCase = cm.CaseUnmarshaler[ErrorCode](_ErrorCodeStrings[:])
+
 // IPAddressFamily represents the enum "wasi:sockets/network@0.2.0#ip-address-family".
 //
 //	enum ip-address-family {
@@ -198,16 +211,29 @@ const (
 	IPAddressFamilyIPv6
 )
 
-var stringsIPAddressFamily = [2]string{
+var _IPAddressFamilyStrings = [2]string{
 	"ipv4",
 	"ipv6",
 }
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e IPAddressFamily) String() string {
-	return stringsIPAddressFamily[e]
+	return _IPAddressFamilyStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e IPAddressFamily) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *IPAddressFamily) UnmarshalText(text []byte) error {
+	return _IPAddressFamilyUnmarshalCase(e, text)
+}
+
+var _IPAddressFamilyUnmarshalCase = cm.CaseUnmarshaler[IPAddressFamily](_IPAddressFamilyStrings[:])
+
 // IPv4Address represents the tuple "wasi:sockets/network@0.2.0#ipv4-address".
 //
 //	type ipv4-address = tuple<u8, u8, u8, u8>
@@ -246,14 +272,14 @@ func (self *IPAddress) IPv6() *IPv6Address {
 	return cm.Case[IPv6Address](self, 1)
 }
 
-var stringsIPAddress = [2]string{
+var _IPAddressStrings = [2]string{
 	"ipv4",
 	"ipv6",
 }
 
 // String implements [fmt.Stringer], returning the variant case name of v.
 func (v IPAddress) String() string {
-	return stringsIPAddress[v.Tag()]
+	return _IPAddressStrings[v.Tag()]
 }
 
 // IPv4SocketAddress represents the record "wasi:sockets/network@0.2.0#ipv4-socket-address".
@@ -263,12 +289,12 @@ func (v IPAddress) String() string {
 //		address: ipv4-address,
 //	}
 type IPv4SocketAddress struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// sin_port
-	Port uint16
+	Port uint16 `json:"port"`
 
 	// sin_addr
-	Address IPv4Address
+	Address IPv4Address `json:"address"`
 }
 
 // IPv6SocketAddress represents the record "wasi:sockets/network@0.2.0#ipv6-socket-address".
@@ -280,18 +306,18 @@ type IPv4SocketAddress struct {
 //		scope-id: u32,
 //	}
 type IPv6SocketAddress struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// sin6_port
-	Port uint16
+	Port uint16 `json:"port"`
 
 	// sin6_flowinfo
-	FlowInfo uint32
+	FlowInfo uint32 `json:"flow-info"`
 
 	// sin6_addr
-	Address IPv6Address
+	Address IPv6Address `json:"address"`
 
 	// sin6_scope_id
-	ScopeID uint32
+	ScopeID uint32 `json:"scope-id"`
 }
 
 // IPSocketAddress represents the variant "wasi:sockets/network@0.2.0#ip-socket-address".
@@ -322,12 +348,12 @@ func (self *IPSocketAddress) IPv6() *IPv6SocketAddress {
 	return cm.Case[IPv6SocketAddress](self, 1)
 }
 
-var stringsIPSocketAddress = [2]string{
+var _IPSocketAddressStrings = [2]string{
 	"ipv4",
 	"ipv6",
 }
 
 // String implements [fmt.Stringer], returning the variant case name of v.
 func (v IPSocketAddress) String() string {
-	return stringsIPSocketAddress[v.Tag()]
+	return _IPSocketAddressStrings[v.Tag()]
 }

src/internal/wasi/sockets/v0.2.0/tcp/abi.go

@@ -23,7 +23,7 @@ type TupleInputStreamOutputStreamShape struct {
 // IPSocketAddressShape is used for storage in variant or result types.
 type IPSocketAddressShape struct {
 	_     cm.HostLayout
-	shape [unsafe.Sizeof(network.IPSocketAddress{})]byte
+	shape [unsafe.Sizeof(IPSocketAddress{})]byte
 }
 
 func lower_IPv4Address(v network.IPv4Address) (f0 uint32, f1 uint32, f2 uint32, f3 uint32) {
@@ -64,14 +64,14 @@ func lower_IPSocketAddress(v network.IPSocketAddress) (f0 uint32, f1 uint32, f2
 	f0 = (uint32)(v.Tag())
 	switch f0 {
 	case 0: // ipv4
-		v1, v2, v3, v4, v5 := lower_IPv4SocketAddress(*v.IPv4())
+		v1, v2, v3, v4, v5 := lower_IPv4SocketAddress(*cm.Case[network.IPv4SocketAddress](&v, 0))
 		f1 = (uint32)(v1)
 		f2 = (uint32)(v2)
 		f3 = (uint32)(v3)
 		f4 = (uint32)(v4)
 		f5 = (uint32)(v5)
 	case 1: // ipv6
-		v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 := lower_IPv6SocketAddress(*v.IPv6())
+		v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 := lower_IPv6SocketAddress(*cm.Case[network.IPv6SocketAddress](&v, 1))
 		f1 = (uint32)(v1)
 		f2 = (uint32)(v2)
 		f3 = (uint32)(v3)

src/internal/wasi/sockets/v0.2.0/tcp/tcp.wasm.go

@@ -46,7 +46,7 @@ func wasmimport_TCPSocketKeepAliveCount(self0 uint32, result *cm.Result[uint32,
 
 //go:wasmimport wasi:sockets/tcp@0.2.0 [method]tcp-socket.keep-alive-enabled
 //go:noescape
-func wasmimport_TCPSocketKeepAliveEnabled(self0 uint32, result *cm.Result[bool, bool, ErrorCode])
+func wasmimport_TCPSocketKeepAliveEnabled(self0 uint32, result *cm.Result[ErrorCode, bool, ErrorCode])
 
 //go:wasmimport wasi:sockets/tcp@0.2.0 [method]tcp-socket.keep-alive-idle-time
 //go:noescape

src/internal/wasi/sockets/v0.2.0/tcp/tcp.wit.go

@@ -71,7 +71,7 @@ const (
 	ShutdownTypeBoth
 )
 
-var stringsShutdownType = [3]string{
+var _ShutdownTypeStrings = [3]string{
 	"receive",
 	"send",
 	"both",
@@ -79,9 +79,22 @@ var stringsShutdownType = [3]string{
 
 // String implements [fmt.Stringer], returning the enum case name of e.
 func (e ShutdownType) String() string {
-	return stringsShutdownType[e]
+	return _ShutdownTypeStrings[e]
 }
 
+// MarshalText implements [encoding.TextMarshaler].
+func (e ShutdownType) MarshalText() ([]byte, error) {
+	return []byte(e.String()), nil
+}
+
+// UnmarshalText implements [encoding.TextUnmarshaler], unmarshaling into an enum
+// case. Returns an error if the supplied text is not one of the enum cases.
+func (e *ShutdownType) UnmarshalText(text []byte) error {
+	return _ShutdownTypeUnmarshalCase(e, text)
+}
+
+var _ShutdownTypeUnmarshalCase = cm.CaseUnmarshaler[ShutdownType](_ShutdownTypeStrings[:])
+
 // TCPSocket represents the imported resource "wasi:sockets/tcp@0.2.0#tcp-socket".
 //
 // A TCP socket resource.
@@ -241,7 +254,7 @@ func (self TCPSocket) HopLimit() (result cm.Result[uint8, uint8, ErrorCode]) {
 func (self TCPSocket) IsListening() (result bool) {
 	self0 := cm.Reinterpret[uint32](self)
 	result0 := wasmimport_TCPSocketIsListening((uint32)(self0))
-	result = cm.U32ToBool((uint32)(result0))
+	result = (bool)(cm.U32ToBool((uint32)(result0)))
 	return
 }
 
@@ -285,7 +298,7 @@ func (self TCPSocket) KeepAliveCount() (result cm.Result[uint32, uint32, ErrorCo
 //	keep-alive-enabled: func() -> result<bool, error-code>
 //
 //go:nosplit
-func (self TCPSocket) KeepAliveEnabled() (result cm.Result[bool, bool, ErrorCode]) {
+func (self TCPSocket) KeepAliveEnabled() (result cm.Result[ErrorCode, bool, ErrorCode]) {
 	self0 := cm.Reinterpret[uint32](self)
 	wasmimport_TCPSocketKeepAliveEnabled((uint32)(self0), &result)
 	return
@@ -457,7 +470,7 @@ func (self TCPSocket) SetKeepAliveCount(value uint32) (result cm.Result[ErrorCod
 //go:nosplit
 func (self TCPSocket) SetKeepAliveEnabled(value bool) (result cm.Result[ErrorCode, struct{}, ErrorCode]) {
 	self0 := cm.Reinterpret[uint32](self)
-	value0 := cm.BoolToU32(value)
+	value0 := (uint32)(cm.BoolToU32(value))
 	wasmimport_TCPSocketSetKeepAliveEnabled((uint32)(self0), (uint32)(value0), &result)
 	return
 }

src/internal/wasi/sockets/v0.2.0/udp/abi.go

@@ -11,7 +11,7 @@ import (
 // IPSocketAddressShape is used for storage in variant or result types.
 type IPSocketAddressShape struct {
 	_     cm.HostLayout
-	shape [unsafe.Sizeof(network.IPSocketAddress{})]byte
+	shape [unsafe.Sizeof(IPSocketAddress{})]byte
 }
 
 func lower_IPv4Address(v network.IPv4Address) (f0 uint32, f1 uint32, f2 uint32, f3 uint32) {
@@ -52,14 +52,14 @@ func lower_IPSocketAddress(v network.IPSocketAddress) (f0 uint32, f1 uint32, f2
 	f0 = (uint32)(v.Tag())
 	switch f0 {
 	case 0: // ipv4
-		v1, v2, v3, v4, v5 := lower_IPv4SocketAddress(*v.IPv4())
+		v1, v2, v3, v4, v5 := lower_IPv4SocketAddress(*cm.Case[network.IPv4SocketAddress](&v, 0))
 		f1 = (uint32)(v1)
 		f2 = (uint32)(v2)
 		f3 = (uint32)(v3)
 		f4 = (uint32)(v4)
 		f5 = (uint32)(v5)
 	case 1: // ipv6
-		v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 := lower_IPv6SocketAddress(*v.IPv6())
+		v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11 := lower_IPv6SocketAddress(*cm.Case[network.IPv6SocketAddress](&v, 1))
 		f1 = (uint32)(v1)
 		f2 = (uint32)(v2)
 		f3 = (uint32)(v3)

src/internal/wasi/sockets/v0.2.0/udp/udp.wit.go

@@ -43,11 +43,11 @@ type IPAddressFamily = network.IPAddressFamily
 //		remote-address: ip-socket-address,
 //	}
 type IncomingDatagram struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// The payload.
 	//
 	// Theoretical max size: ~64 KiB. In practice, typically less than 1500 bytes.
-	Data cm.List[uint8]
+	Data cm.List[uint8] `json:"data"`
 
 	// The source address.
 	//
@@ -55,7 +55,7 @@ type IncomingDatagram struct {
 	// with, if any.
 	//
 	// Equivalent to the `src_addr` out parameter of `recvfrom`.
-	RemoteAddress IPSocketAddress
+	RemoteAddress IPSocketAddress `json:"remote-address"`
 }
 
 // OutgoingDatagram represents the record "wasi:sockets/udp@0.2.0#outgoing-datagram".
@@ -67,9 +67,9 @@ type IncomingDatagram struct {
 //		remote-address: option<ip-socket-address>,
 //	}
 type OutgoingDatagram struct {
-	_ cm.HostLayout
+	_ cm.HostLayout `json:"-"`
 	// The payload.
-	Data cm.List[uint8]
+	Data cm.List[uint8] `json:"data"`
 
 	// The destination address.
 	//
@@ -80,7 +80,7 @@ type OutgoingDatagram struct {
 	//
 	// If this value is None, the send operation is equivalent to `send` in POSIX. Otherwise
 	// it is equivalent to `sendto`.
-	RemoteAddress cm.Option[IPSocketAddress]
+	RemoteAddress cm.Option[IPSocketAddress] `json:"remote-address"`
 }
 
 // UDPSocket represents the imported resource "wasi:sockets/udp@0.2.0#udp-socket".
@@ -321,10 +321,10 @@ func (self UDPSocket) StartBind(network_ Network, localAddress IPSocketAddress)
 // The POSIX equivalent in pseudo-code is:
 //
 //	if (was previously connected) {
-//	connect(s, AF_UNSPEC)
+//		connect(s, AF_UNSPEC)
 //	}
 //	if (remote_address is Some) {
-//	connect(s, remote_address)
+//		connect(s, remote_address)
 //	}
 //
 // Unlike in POSIX, the socket must already be explicitly bound.

src/machine/board_feather-stm32f405.go

@@ -186,15 +186,15 @@ const (
 )
 
 var (
-	SPI1 = SPI{
+	SPI1 = &SPI{
 		Bus:             stm32.SPI2,
 		AltFuncSelector: AF5_SPI1_SPI2,
 	}
-	SPI2 = SPI{
+	SPI2 = &SPI{
 		Bus:             stm32.SPI3,
 		AltFuncSelector: AF6_SPI3,
 	}
-	SPI3 = SPI{
+	SPI3 = &SPI{
 		Bus:             stm32.SPI1,
 		AltFuncSelector: AF5_SPI1_SPI2,
 	}

src/machine/board_gnse.go

@@ -77,7 +77,7 @@ var (
 	I2C0 = I2C1
 
 	// SPI
-	SPI3 = SPI{
+	SPI3 = &SPI{
 		Bus: stm32.SPI3,
 	}
 )

src/machine/board_hifive1b_baremetal.go

@@ -6,7 +6,7 @@ import "device/sifive"
 
 // SPI on the HiFive1.
 var (
-	SPI1 = SPI{
+	SPI1 = &SPI{
 		Bus: sifive.QSPI1,
 	}
 )

src/machine/board_lgt92.go

@@ -84,10 +84,10 @@ var (
 	I2C0 = I2C1
 
 	// SPI
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus: stm32.SPI1,
 	}
-	SPI1 = &SPI0
+	SPI1 = SPI0
 )
 
 func init() {

src/machine/board_lorae5.go

@@ -85,7 +85,7 @@ var (
 	I2C0 = I2C2
 
 	// SPI
-	SPI3 = SPI{
+	SPI3 = &SPI{
 		Bus: stm32.SPI3,
 	}
 )

src/machine/board_maixbit_baremetal.go

@@ -6,10 +6,10 @@ import "device/kendryte"
 
 // SPI on the MAix Bit.
 var (
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus: kendryte.SPI0,
 	}
-	SPI1 = SPI{
+	SPI1 = &SPI{
 		Bus: kendryte.SPI1,
 	}
 )

src/machine/board_mksnanov3.go

@@ -89,11 +89,11 @@ const (
 
 // Since the first interface is named SPI1, both SPI0 and SPI1 refer to SPI1.
 var (
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus:             stm32.SPI1,
 		AltFuncSelector: AF5_SPI1_SPI2,
 	}
-	SPI1 = &SPI0
+	SPI1 = SPI0
 )
 
 const (

src/machine/board_nucleol031k6.go

@@ -86,11 +86,11 @@ var (
 	I2C0 = I2C1
 
 	// SPI
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus:             stm32.SPI1,
 		AltFuncSelector: 0,
 	}
-	SPI1 = &SPI0
+	SPI1 = SPI0
 )
 
 func init() {

src/machine/board_nucleowl55jc.go

@@ -84,7 +84,7 @@ var (
 	I2C0 = I2C1
 
 	// SPI
-	SPI3 = SPI{
+	SPI3 = &SPI{
 		Bus: stm32.SPI3,
 	}
 )

src/machine/board_stm32f469disco.go

@@ -59,11 +59,11 @@ const (
 // Since the first interface is named SPI1, both SPI0 and SPI1 refer to SPI1.
 // TODO: implement SPI2 and SPI3.
 var (
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus:             stm32.SPI1,
 		AltFuncSelector: AF5_SPI1_SPI2,
 	}
-	SPI1 = &SPI0
+	SPI1 = SPI0
 )
 
 const (

src/machine/board_stm32f4disco.go

@@ -86,11 +86,11 @@ const (
 // Since the first interface is named SPI1, both SPI0 and SPI1 refer to SPI1.
 // TODO: implement SPI2 and SPI3.
 var (
-	SPI0 = SPI{
+	SPI0 = &SPI{
 		Bus:             stm32.SPI1,
 		AltFuncSelector: AF5_SPI1_SPI2,
 	}
-	SPI1 = &SPI0
+	SPI1 = SPI0
 )
 
 const (

src/machine/board_teensy40.go

@@ -263,9 +263,8 @@ const (
 )
 
 var (
-	SPI0  = SPI1 // SPI0 is an alias of SPI1 (LPSPI4)
+	SPI0 = SPI1 // SPI0 is an alias of SPI1 (LPSPI4)
-	SPI1  = &_SPI1
+	SPI1 = &SPI{
-	_SPI1 = SPI{
 		Bus: nxp.LPSPI4,
 		muxSDI: muxSelect{ // D12 (PB1 [B0_01])
 			mux: nxp.IOMUXC_LPSPI4_SDI_SELECT_INPUT_DAISY_GPIO_B0_01_ALT3,
@@ -284,8 +283,7 @@ var (
 			sel: &nxp.IOMUXC.LPSPI4_PCS0_SELECT_INPUT,
 		},
 	}
-	SPI2  = &_SPI2
+	SPI2 = &SPI{
-	_SPI2 = SPI{
 		Bus: nxp.LPSPI3,
 		muxSDI: muxSelect{ // D1 (PA2 [AD_B0_02])
 			mux: nxp.IOMUXC_LPSPI3_SDI_SELECT_INPUT_DAISY_GPIO_AD_B0_02_ALT7,
@@ -304,8 +302,7 @@ var (
 			sel: &nxp.IOMUXC.LPSPI3_PCS0_SELECT_INPUT,
 		},
 	}
-	SPI3  = &_SPI3
+	SPI3 = &SPI{
-	_SPI3 = SPI{
 		Bus: nxp.LPSPI1,
 		muxSDI: muxSelect{ // D34 (PC15 [SD_B0_03])
 			mux: nxp.IOMUXC_LPSPI1_SDI_SELECT_INPUT_DAISY_GPIO_SD_B0_03_ALT4,

src/machine/flash.go

@@ -1,4 +1,4 @@
-//go:build nrf || nrf51 || nrf52 || nrf528xx || stm32f4 || stm32l4 || stm32wlx || atsamd21 || atsamd51 || atsame5x || rp2040
+//go:build nrf || nrf51 || nrf52 || nrf528xx || stm32f4 || stm32l4 || stm32wlx || atsamd21 || atsamd51 || atsame5x || rp2040 || rp2350
 
 package machine
 

src/machine/machine_atmega.go

@@ -257,7 +257,7 @@ type SPI struct {
 }
 
 // Configure is intended to setup the SPI interface.
-func (s SPI) Configure(config SPIConfig) error {
+func (s *SPI) Configure(config SPIConfig) error {
 
 	// This is only here to help catch a bug with the configuration
 	// where a machine missed a value.
@@ -330,7 +330,7 @@ func (s SPI) Configure(config SPIConfig) error {
 }
 
 // Transfer writes the byte into the register and returns the read content
-func (s SPI) Transfer(b byte) (byte, error) {
+func (s *SPI) Transfer(b byte) (byte, error) {
 	s.spdr.Set(uint8(b))
 
 	for !s.spsr.HasBits(s.spsrSPIF) {

src/machine/machine_atmega1280.go

@@ -927,7 +927,7 @@ func (pwm PWM) Set(channel uint8, value uint32) {
 }
 
 // SPI configuration
-var SPI0 = SPI{
+var SPI0 = &SPI{
 	spcr: avr.SPCR,
 	spdr: avr.SPDR,
 	spsr: avr.SPSR,

src/machine/machine_atmega1284p.go

@@ -71,7 +71,7 @@ func (p Pin) getPortMask() (*volatile.Register8, uint8) {
 }
 
 // SPI configuration
-var SPI0 = SPI{
+var SPI0 = &SPI{
 	spcr: avr.SPCR,
 	spsr: avr.SPSR,
 	spdr: avr.SPDR,

src/machine/machine_atmega2560.go

@@ -131,7 +131,7 @@ func (p Pin) getPortMask() (*volatile.Register8, uint8) {
 }
 
 // SPI configuration
-var SPI0 = SPI{
+var SPI0 = &SPI{
 	spcr: avr.SPCR,
 	spdr: avr.SPDR,
 	spsr: avr.SPSR,

src/machine/machine_atmega328p.go

@@ -25,7 +25,7 @@ var I2C0 = &I2C{
 }
 
 // SPI configuration
-var SPI0 = SPI{
+var SPI0 = &SPI{
 	spcr: avr.SPCR,
 	spdr: avr.SPDR,
 	spsr: avr.SPSR,

src/machine/machine_atmega328pb.go

@@ -60,7 +60,7 @@ var I2C1 = &I2C{
 }
 
 // SPI configuration
-var SPI0 = SPI{
+var SPI0 = &SPI{
 	spcr: avr.SPCR0,
 	spdr: avr.SPDR0,
 	spsr: avr.SPSR0,
@@ -82,7 +82,7 @@ var SPI0 = SPI{
 	cs:  PB2,
 }
 
-var SPI1 = SPI{
+var SPI1 = &SPI{
 	spcr: avr.SPCR1,
 	spdr: avr.SPDR1,
 	spsr: avr.SPSR1,

src/machine/machine_atsamd21.go

@@ -1224,7 +1224,7 @@ type SPIConfig struct {
 }
 
 // Configure is intended to setup the SPI interface.
-func (spi SPI) Configure(config SPIConfig) error {
+func (spi *SPI) Configure(config SPIConfig) error {
 	// Use default pins if not set.
 	if config.SCK == 0 && config.SDO == 0 && config.SDI == 0 {
 		config.SCK = SPI0_SCK_PIN
@@ -1346,7 +1346,7 @@ func (spi SPI) Configure(config SPIConfig) error {
 }
 
 // Transfer writes/reads a single byte using the SPI interface.
-func (spi SPI) Transfer(w byte) (byte, error) {
+func (spi *SPI) Transfer(w byte) (byte, error) {
 	// write data
 	spi.Bus.DATA.Set(uint32(w))
 
@@ -1375,7 +1375,7 @@ func (spi SPI) Transfer(w byte) (byte, error) {
 // This form sends zeros, putting the result into the rx buffer. Good for reading a "result packet":
 //
 //	spi.Tx(nil, rx)
-func (spi SPI) Tx(w, r []byte) error {
+func (spi *SPI) Tx(w, r []byte) error {
 	switch {
 	case w == nil:
 		// read only, so write zero and read a result.
@@ -1396,7 +1396,7 @@ func (spi SPI) Tx(w, r []byte) error {
 	return nil
 }
 
-func (spi SPI) tx(tx []byte) {
+func (spi *SPI) tx(tx []byte) {
 	for i := 0; i < len(tx); i++ {
 		for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPI_INTFLAG_DRE) {
 		}
@@ -1411,7 +1411,7 @@ func (spi SPI) tx(tx []byte) {
 	}
 }
 
-func (spi SPI) rx(rx []byte) {
+func (spi *SPI) rx(rx []byte) {
 	spi.Bus.DATA.Set(0)
 	for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPI_INTFLAG_DRE) {
 	}
@@ -1427,7 +1427,7 @@ func (spi SPI) rx(rx []byte) {
 	rx[len(rx)-1] = byte(spi.Bus.DATA.Get())
 }
 
-func (spi SPI) txrx(tx, rx []byte) {
+func (spi *SPI) txrx(tx, rx []byte) {
 	spi.Bus.DATA.Set(uint32(tx[0]))
 	for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPI_INTFLAG_DRE) {
 	}

src/machine/machine_atsamd21e18.go

@@ -22,10 +22,10 @@ var (
 	sercomI2CM2 = &I2C{Bus: sam.SERCOM2_I2CM, SERCOM: 2}
 	sercomI2CM3 = &I2C{Bus: sam.SERCOM3_I2CM, SERCOM: 3}
 
-	sercomSPIM0 = SPI{Bus: sam.SERCOM0_SPI, SERCOM: 0}
+	sercomSPIM0 = &SPI{Bus: sam.SERCOM0_SPI, SERCOM: 0}
-	sercomSPIM1 = SPI{Bus: sam.SERCOM1_SPI, SERCOM: 1}
+	sercomSPIM1 = &SPI{Bus: sam.SERCOM1_SPI, SERCOM: 1}
-	sercomSPIM2 = SPI{Bus: sam.SERCOM2_SPI, SERCOM: 2}
+	sercomSPIM2 = &SPI{Bus: sam.SERCOM2_SPI, SERCOM: 2}
-	sercomSPIM3 = SPI{Bus: sam.SERCOM3_SPI, SERCOM: 3}
+	sercomSPIM3 = &SPI{Bus: sam.SERCOM3_SPI, SERCOM: 3}
 )
 
 func init() {

src/machine/machine_atsamd21g18.go

@@ -26,12 +26,12 @@ var (
 	sercomI2CM4 = &I2C{Bus: sam.SERCOM4_I2CM, SERCOM: 4}
 	sercomI2CM5 = &I2C{Bus: sam.SERCOM5_I2CM, SERCOM: 5}
 
-	sercomSPIM0 = SPI{Bus: sam.SERCOM0_SPI, SERCOM: 0}
+	sercomSPIM0 = &SPI{Bus: sam.SERCOM0_SPI, SERCOM: 0}
-	sercomSPIM1 = SPI{Bus: sam.SERCOM1_SPI, SERCOM: 1}
+	sercomSPIM1 = &SPI{Bus: sam.SERCOM1_SPI, SERCOM: 1}
-	sercomSPIM2 = SPI{Bus: sam.SERCOM2_SPI, SERCOM: 2}
+	sercomSPIM2 = &SPI{Bus: sam.SERCOM2_SPI, SERCOM: 2}
-	sercomSPIM3 = SPI{Bus: sam.SERCOM3_SPI, SERCOM: 3}
+	sercomSPIM3 = &SPI{Bus: sam.SERCOM3_SPI, SERCOM: 3}
-	sercomSPIM4 = SPI{Bus: sam.SERCOM4_SPI, SERCOM: 4}
+	sercomSPIM4 = &SPI{Bus: sam.SERCOM4_SPI, SERCOM: 4}
-	sercomSPIM5 = SPI{Bus: sam.SERCOM5_SPI, SERCOM: 5}
+	sercomSPIM5 = &SPI{Bus: sam.SERCOM5_SPI, SERCOM: 5}
 )
 
 func init() {

src/machine/machine_atsamd51.go

@@ -1431,7 +1431,7 @@ type SPIConfig struct {
 }
 
 // Configure is intended to setup the SPI interface.
-func (spi SPI) Configure(config SPIConfig) error {
+func (spi *SPI) Configure(config SPIConfig) error {
 	// Use default pins if not set.
 	if config.SCK == 0 && config.SDO == 0 && config.SDI == 0 {
 		config.SCK = SPI0_SCK_PIN
@@ -1574,7 +1574,7 @@ func (spi SPI) Configure(config SPIConfig) error {
 }
 
 // Transfer writes/reads a single byte using the SPI interface.
-func (spi SPI) Transfer(w byte) (byte, error) {
+func (spi *SPI) Transfer(w byte) (byte, error) {
 	// write data
 	spi.Bus.DATA.Set(uint32(w))
 
@@ -1603,7 +1603,7 @@ func (spi SPI) Transfer(w byte) (byte, error) {
 // This form sends zeros, putting the result into the rx buffer. Good for reading a "result packet":
 //
 //	spi.Tx(nil, rx)
-func (spi SPI) Tx(w, r []byte) error {
+func (spi *SPI) Tx(w, r []byte) error {
 	switch {
 	case w == nil:
 		// read only, so write zero and read a result.
@@ -1624,7 +1624,7 @@ func (spi SPI) Tx(w, r []byte) error {
 	return nil
 }
 
-func (spi SPI) tx(tx []byte) {
+func (spi *SPI) tx(tx []byte) {
 	for i := 0; i < len(tx); i++ {
 		for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
 		}
@@ -1639,7 +1639,7 @@ func (spi SPI) tx(tx []byte) {
 	}
 }
 
-func (spi SPI) rx(rx []byte) {
+func (spi *SPI) rx(rx []byte) {
 	spi.Bus.DATA.Set(0)
 	for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
 	}
@@ -1655,7 +1655,7 @@ func (spi SPI) rx(rx []byte) {
 	rx[len(rx)-1] = byte(spi.Bus.DATA.Get())
 }
 
-func (spi SPI) txrx(tx, rx []byte) {
+func (spi *SPI) txrx(tx, rx []byte) {
 	spi.Bus.DATA.Set(uint32(tx[0]))
 	for !spi.Bus.INTFLAG.HasBits(sam.SERCOM_SPIM_INTFLAG_DRE) {
 	}