Prepare for go.dev/cl/652276

Upstream Go CL https://go.dev/cl/652276 removes an unused field from
runtime.gobuf. This CL prepares for this change.

This CL also simplifies the build constraints in the hosttid files:
- Remove legacy '// +build' constraint syntax
- Remove explicit GOARCH matching. The GOARCH is in the filename

PiperOrigin-RevId: 733382770

pkg/goid/BUILD

@@ -13,6 +13,8 @@ go_library(
         "goid_122_arm64.s",
         "goid_123_amd64.s",
         "goid_123_arm64.s",
+        "goid_125_amd64.s",
+        "goid_125_arm64.s",
     ],
     stateify = False,
     visibility = ["//visibility:public"],

pkg/goid/goid_123_amd64.s

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build go1.23
+//go:build go1.23 && !go1.25
 
 #include "textflag.h"
 

pkg/goid/goid_123_arm64.s

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build go1.23
+//go:build go1.23 && !go1.25
 
 #include "textflag.h"
 

pkg/goid/goid_125_amd64.s

@@ -0,0 +1,26 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build go1.25
+
+#include "textflag.h"
+
+#define GOID_OFFSET 152 // +checkoffset runtime g.goid
+
+// func goid() int64
+TEXT ·goid(SB),NOSPLIT|NOFRAME,$0-8
+  MOVQ (TLS), R14
+  MOVQ GOID_OFFSET(R14), R14
+  MOVQ R14, ret+0(FP)
+  RET

pkg/goid/goid_125_arm64.s

@@ -0,0 +1,26 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build go1.25
+
+#include "textflag.h"
+
+#define GOID_OFFSET 152 // +checkoffset runtime g.goid
+
+// func goid() int64
+TEXT ·goid(SB),NOSPLIT,$0-8
+        MOVD g, R0      // g
+        MOVD GOID_OFFSET(R0), R0
+        MOVD R0, ret+0(FP)
+        RET

pkg/hosttid/BUILD

@@ -9,8 +9,10 @@ go_library(
     name = "hosttid",
     srcs = [
         "hosttid.go",
-        "hosttid_amd64.s",
-        "hosttid_arm64.s",
+        "hosttid_124_amd64.s",
+        "hosttid_124_arm64.s",
+        "hosttid_125_amd64.s",
+        "hosttid_125_arm64.s",
     ],
     visibility = ["//visibility:public"],
 )

pkg/hosttid/hosttid_124_amd64.s

@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build amd64
-// +build amd64
+//go:build !go1.25
 
 #include "textflag.h"
 

pkg/hosttid/hosttid_124_arm64.s

@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build arm64
-// +build arm64
+//go:build !go1.25
 
 #include "textflag.h"
 

pkg/hosttid/hosttid_125_amd64.s

@@ -0,0 +1,29 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build go1.25
+
+#include "textflag.h"
+
+#define M_OFFSET       48 // +checkoffset runtime g.m
+#define PROCID_OFFSET  64 // +checkoffset runtime m.procid
+
+TEXT ·Current(SB),NOSPLIT|NOFRAME,$0-8
+	// procid is in getg().m.procid.
+	MOVQ TLS, AX
+	MOVQ 0(AX)(TLS*1), AX
+	MOVQ M_OFFSET(AX), AX // gp.m
+	MOVQ PROCID_OFFSET(AX), AX // mp.procid
+	MOVQ AX, ret+0(FP)
+	RET

pkg/hosttid/hosttid_125_arm64.s

@@ -0,0 +1,28 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build go1.25
+
+#include "textflag.h"
+
+#define M_OFFSET      48 // +checkoffset runtime g.m
+#define PROCID_OFFSET 64 // +checkoffset runtime m.procid
+
+TEXT ·Current(SB),NOSPLIT,$0-8
+	// procid is in getg().m.procid.
+	MOVD g, R0      // g
+	MOVD M_OFFSET(R0), R0 // gp.m
+	MOVD PROCID_OFFSET(R0), R0 // mp.procid
+	MOVD R0, ret+0(FP)
+	RET