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

attr/attr.go

@@ -10,50 +10,7 @@ import (
 // Attribute represents TEXT or DATA flags.
 type Attribute uint16
 
-// Reference: https://github.com/golang/go/blob/aafe257390cc9048e8b5df898fabd79a9e0d4c39/src/runtime/textflag.h#L11-L37
-//
-//	// 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
-//
-const (
-	NOPROF Attribute = 1 << iota
-	DUPOK
-	NOSPLIT
-	RODATA
-	NOPTR
-	WRAPPER
-	NEEDCTXT
-	_
-	TLSBSS
-	NOFRAME
-	REFLECTMETHOD
-	TOPFRAME
-)
+//go:generate go run make_textflag.go -output ztextflag.go
 
 // Asm returns a representation of the attributes in assembly syntax. This may use macros from "textflags.h"; see ContainsTextFlags() to determine if this header is required.
 func (a Attribute) Asm() string {
@@ -86,17 +43,3 @@ func (a Attribute) split() ([]string, Attribute) {
 	}
 	return flags, rest
 }
-
-var attrname = map[Attribute]string{
-	NOPROF:        "NOPROF",
-	DUPOK:         "DUPOK",
-	NOSPLIT:       "NOSPLIT",
-	RODATA:        "RODATA",
-	NOPTR:         "NOPTR",
-	WRAPPER:       "WRAPPER",
-	NEEDCTXT:      "NEEDCTXT",
-	TLSBSS:        "TLSBSS",
-	NOFRAME:       "NOFRAME",
-	REFLECTMETHOD: "REFLECTMETHOD",
-	TOPFRAME:      "TOPFRAME",
-}