attr: generate code from textflag.h (#176)

attr/textflag.h

@@ -0,0 +1,39 @@
+// Code generated by downloading from https://github.com/golang/go/raw/go1.16.2/src/runtime/textflag.h. DO NOT EDIT.
+
+// Copyright 2013 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.
+
+// This file defines flags attached to various functions
+// and data objects. The compilers, assemblers, and linker must
+// all agree on these values.
+//
+// Keep in sync with src/cmd/internal/obj/textflag.go.
+
+// Don't profile the marked routine. This flag is deprecated.
+#define NOPROF	1
+// It is ok for the linker to get multiple of these symbols. It will
+// pick one of the duplicates to use.
+#define DUPOK	2
+// Don't insert stack check preamble.
+#define NOSPLIT	4
+// Put this data in a read-only section.
+#define RODATA	8
+// This data contains no pointers.
+#define NOPTR	16
+// This is a wrapper function and should not count as disabling 'recover'.
+#define WRAPPER 32
+// This function uses its incoming context register.
+#define NEEDCTXT 64
+// Allocate a word of thread local storage and store the offset from the
+// thread local base to the thread local storage in this variable.
+#define TLSBSS	256
+// Do not insert instructions to allocate a stack frame for this function.
+// Only valid on functions that declare a frame size of 0.
+// TODO(mwhudson): only implemented for ppc64x at present.
+#define NOFRAME 512
+// Function can call reflect.Type.Method or reflect.Type.MethodByName.
+#define REFLECTMETHOD 1024
+// Function is the top of the call stack. Call stack unwinders should stop
+// at this function.
+#define TOPFRAME 2048