all: add wasip1 asm and link logic

Add wasip1 asm and symbols to cmd/internal/obj, cmd/link and
runtime.

For #58141

Co-authored-by: Richard Musiol <neelance@gmail.com>
Co-authored-by: Achille Roussel <achille.roussel@gmail.com>
Co-authored-by: Julien Fabre <ju.pryz@gmail.com>
Co-authored-by: Evan Phoenix <evan@phx.io>
Change-Id: Ie088d9b65ea13e231694af6341465f95be33093f
Reviewed-on: https://go-review.googlesource.com/c/go/+/479617
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>

3 files changed, 57 insertions, 39 deletions

diff --git a/src/runtime/asm_wasm.s b/src/runtime/asm_wasm.s
index 330c10cc0c..9cd8b5a99f 100644
--- a/src/runtime/asm_wasm.s
+++ b/src/runtime/asm_wasm.s
@@ -15,7 +15,9 @@ TEXT runtime·rt0_go(SB), NOSPLIT|NOFRAME|TOPFRAME, $0
 	// set g to g0
 	MOVD $runtime·g0(SB), g
 	CALLNORESUME runtime·check(SB)
+#ifdef GOOS_js
 	CALLNORESUME runtime·args(SB)
+#endif
 	CALLNORESUME runtime·osinit(SB)
 	CALLNORESUME runtime·schedinit(SB)
 	MOVD $runtime·mainPC(SB), 0(SP)
@@ -482,3 +484,42 @@ TEXT runtime·gcWriteBarrier8<ABIInternal>(SB),NOSPLIT,$0
 	I64Const $64
 	Call	gcWriteBarrier<>(SB)
 	Return
+
+TEXT wasm_pc_f_loop(SB),NOSPLIT,$0
+// Call the function for the current PC_F. Repeat until PAUSE != 0 indicates pause or exit.
+// The WebAssembly stack may unwind, e.g. when switching goroutines.
+// The Go stack on the linear memory is then used to jump to the correct functions
+// with this loop, without having to restore the full WebAssembly stack.
+// It is expected to have a pending call before entering the loop, so check PAUSE first.
+	Get PAUSE
+	I32Eqz
+	If
+	loop:
+		Loop
+			// Get PC_B & PC_F from -8(SP)
+			Get SP
+			I32Const $8
+			I32Sub
+			I32Load16U $0 // PC_B
+
+			Get SP
+			I32Const $8
+			I32Sub
+			I32Load16U $2 // PC_F
+
+			CallIndirect $0
+			Drop
+
+			Get PAUSE
+			I32Eqz
+			BrIf loop
+		End
+	End
+
+	I32Const $0
+	Set PAUSE
+
+	Return
+
+TEXT wasm_export_lib(SB),NOSPLIT,$0
+	UNDEF
diff --git a/src/runtime/rt0_js_wasm.s b/src/runtime/rt0_js_wasm.s
index 6f67752d63..34a60474f7 100644
--- a/src/runtime/rt0_js_wasm.s
+++ b/src/runtime/rt0_js_wasm.s
@@ -48,42 +48,6 @@ TEXT wasm_export_resume(SB),NOSPLIT,$0
 
 	Return
 
-TEXT wasm_pc_f_loop(SB),NOSPLIT,$0
-// Call the function for the current PC_F. Repeat until PAUSE != 0 indicates pause or exit.
-// The WebAssembly stack may unwind, e.g. when switching goroutines.
-// The Go stack on the linear memory is then used to jump to the correct functions
-// with this loop, without having to restore the full WebAssembly stack.
-// It is expected to have a pending call before entering the loop, so check PAUSE first.
-	Get PAUSE
-	I32Eqz
-	If
-	loop:
-		Loop
-			// Get PC_B & PC_F from -8(SP)
-			Get SP
-			I32Const $8
-			I32Sub
-			I32Load16U $0 // PC_B
-
-			Get SP
-			I32Const $8
-			I32Sub
-			I32Load16U $2 // PC_F
-
-			CallIndirect $0
-			Drop
-
-			Get PAUSE
-			I32Eqz
-			BrIf loop
-		End
-	End
-
-	I32Const $0
-	Set PAUSE
-
-	Return
-
 // wasm_export_getsp gets called from JavaScript to retrieve the SP.
 TEXT wasm_export_getsp(SB),NOSPLIT,$0
 	Get SP
@@ -101,6 +65,3 @@ TEXT runtime·exit(SB), NOSPLIT, $0-4
 	I32Const $1
 	Set PAUSE
 	RETUNWIND
-
-TEXT wasm_export_lib(SB),NOSPLIT,$0
-	UNDEF
diff --git a/src/runtime/rt0_wasip1_wasm.s b/src/runtime/rt0_wasip1_wasm.s
new file mode 100644
index 0000000000..6dc239306b
--- /dev/null
+++ b/src/runtime/rt0_wasip1_wasm.s
@@ -0,0 +1,16 @@
+// Copyright 2023 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.
+
+#include "go_asm.h"
+#include "textflag.h"
+
+TEXT _rt0_wasm_wasip1(SB),NOSPLIT,$0
+	MOVD $runtime·wasmStack+(m0Stack__size-16)(SB), SP
+
+	I32Const $0 // entry PC_B
+	Call runtime·rt0_go(SB)
+	Drop
+	Call wasm_pc_f_loop(SB)
+
+	Return