diff --git a/const.go b/const.go
index 1c0719b0..3ff8a260 100644
--- a/const.go
+++ b/const.go
@@ -12,7 +12,6 @@ const (
 	UInt64Size         = int(unsafe.Sizeof(uint64(0)))
 	_FuncSize          = int(unsafe.Offsetof(_func{}.nfuncdata)) + int(unsafe.Sizeof(_func{}.nfuncdata))
 	FindFuncBucketSize = int(unsafe.Sizeof(findfuncbucket{}))
-	InlinedCallSize    = int(unsafe.Sizeof(inlinedCall{}))
 	InvalidHandleValue = ^uintptr(0)
 	InvalidOffset      = int(-1)
 	PageSize           = 1 << 12 //4096
diff --git a/func.1.12.go b/func.1.12.go
index c0c8fbee..7ad72be1 100644
--- a/func.1.12.go
+++ b/func.1.12.go
@@ -66,3 +66,7 @@ func getfuncname(f *_func, md *moduledata) string {
 	}
 	return gostringnocopy(&(md.pclntable[f.nameoff]))
 }
+
+func getfuncID(f *_func) uint8 {
+	return uint8(f.funcID)
+}
diff --git a/func.1.16.go b/func.1.16.go
index 517c371a..e8e5d9a1 100644
--- a/func.1.16.go
+++ b/func.1.16.go
@@ -64,3 +64,7 @@ func getfuncname(f *_func, md *moduledata) string {
 	}
 	return gostringnocopy(&(md.funcnametab[f.nameoff]))
 }
+
+func getfuncID(f *_func) uint8 {
+	return uint8(f.funcID)
+}
diff --git a/func.1.18.go b/func.1.18.go
index 7fb4ead3..84210958 100644
--- a/func.1.18.go
+++ b/func.1.18.go
@@ -70,3 +70,7 @@ func getfuncname(f *_func, md *moduledata) string {
 	}
 	return gostringnocopy(&(md.funcnametab[f.nameoff]))
 }
+
+func getfuncID(f *_func) uint8 {
+	return uint8(f.funcID)
+}
diff --git a/func.1.8.go b/func.1.8.go
index 5244ab38..0df90cc6 100644
--- a/func.1.8.go
+++ b/func.1.8.go
@@ -47,3 +47,7 @@ func getfuncname(f *_func, md *moduledata) string {
 	}
 	return gostringnocopy(&(md.pclntable[f.nameoff]))
 }
+
+func getfuncID(f *_func) uint8 {
+	return 0
+}
diff --git a/inlinetree.1.8.go b/inlinetree.1.8.go
deleted file mode 100644
index bbf488d0..00000000
--- a/inlinetree.1.8.go
+++ /dev/null
@@ -1,12 +0,0 @@
-//go:build go1.8 && !go1.9
-// +build go1.8,!go1.9
-
-package goloader
-
-import "github.com/pkujhd/goloader/obj"
-
-type inlinedCall struct{}
-
-func (linker *Linker) addInlineTree(_func *_func, objsym *obj.ObjSymbol) (err error) {
-	return nil
-}
diff --git a/inlinetree.go b/inlinetree.go
index 8231ee00..462b9d00 100644
--- a/inlinetree.go
+++ b/inlinetree.go
@@ -1,6 +1,3 @@
-//go:build go1.9 && !go1.19
-// +build go1.9,!go1.19
-
 package goloader
 
 import (
@@ -10,16 +7,6 @@ import (
 	"github.com/pkujhd/goloader/objabi/dataindex"
 )
 
-func findFileTab(linker *Linker, filename string) int32 {
-	tab := linker.namemap[filename]
-	for index, value := range linker.filetab {
-		if uint32(tab) == value {
-			return int32(index)
-		}
-	}
-	return -1
-}
-
 func (linker *Linker) addInlineTree(_func *_func, symbol *obj.ObjSymbol) (err error) {
 	funcname := symbol.Name
 	Func := symbol.Func
@@ -40,10 +27,10 @@ func (linker *Linker) addInlineTree(_func *_func, symbol *obj.ObjSymbol) (err er
 			}
 		}
 
-		bytes := make([]byte, len(Func.InlTree)*InlinedCallSize)
+		bytes := make([]byte, len(Func.InlTree)*obj.InlinedCallSize)
 		for k, inl := range Func.InlTree {
-			inlinedcall := linker.initInlinedCall(inl, _func)
-			copy2Slice(bytes[k*InlinedCallSize:], uintptr(unsafe.Pointer(&inlinedcall)), InlinedCallSize)
+			inlinedcall := obj.InitInlinedCall(inl, getfuncID(_func), linker.namemap, linker.filetab)
+			copy2Slice(bytes[k*obj.InlinedCallSize:], uintptr(unsafe.Pointer(&inlinedcall)), obj.InlinedCallSize)
 		}
 		offset := len(linker.noptrdata)
 		linker.noptrdata = append(linker.noptrdata, bytes...)
diff --git a/obj/const.go b/obj/const.go
index d9dd8161..cfa16ebb 100644
--- a/obj/const.go
+++ b/obj/const.go
@@ -1,8 +1,13 @@
 package obj
 
+import (
+	"unsafe"
+)
+
 const (
-	InvalidOffset = int(-1)
-	InvalidIndex  = uint32(0xFFFFFFFF)
-	EmptyPkgPath  = `""`
-	EmptyString   = ""
+	InvalidOffset   = int(-1)
+	InvalidIndex    = uint32(0xFFFFFFFF)
+	InlinedCallSize = int(unsafe.Sizeof(InlinedCall{}))
+	EmptyPkgPath    = `""`
+	EmptyString     = ""
 )
diff --git a/inlinetree.1.12.go b/obj/inlinedcall.1.12.go
similarity index 66%
rename from inlinetree.1.12.go
rename to obj/inlinedcall.1.12.go
index 60259c73..99fe989b 100644
--- a/inlinetree.1.12.go
+++ b/obj/inlinedcall.1.12.go
@@ -1,14 +1,12 @@
 //go:build go1.12 && !go1.19
 // +build go1.12,!go1.19
 
-package goloader
+package obj
 
-import (
-	"github.com/pkujhd/goloader/obj"
-)
+type funcID uint8
 
 // inlinedCall is the encoding of entries in the FUNCDATA_InlTree table.
-type inlinedCall struct {
+type InlinedCall struct {
 	parent   int16  // index of parent in the inltree, or < 0
 	funcID   funcID // type of the called function
 	_        byte
@@ -18,12 +16,12 @@ type inlinedCall struct {
 	parentPc int32 // position of an instruction whose source position is the call site (offset from entry)
 }
 
-func (linker *Linker) initInlinedCall(inl obj.InlTreeNode, _func *_func) inlinedCall {
-	return inlinedCall{
+func InitInlinedCall(inl InlTreeNode, funcid uint8, namemap map[string]int, filetab []uint32) InlinedCall {
+	return InlinedCall{
 		parent:   int16(inl.Parent),
-		funcID:   _func.funcID,
-		file:     findFileTab(linker, inl.File),
+		funcID:   funcID(funcid),
+		file:     findFileTab(inl.File, namemap, filetab),
 		line:     int32(inl.Line),
-		func_:    int32(linker.namemap[inl.Func]),
+		func_:    int32(namemap[inl.Func]),
 		parentPc: int32(inl.ParentPC)}
 }
diff --git a/obj/inlinedcall.1.8.go b/obj/inlinedcall.1.8.go
new file mode 100644
index 00000000..177bc6dc
--- /dev/null
+++ b/obj/inlinedcall.1.8.go
@@ -0,0 +1,12 @@
+//go:build go1.8 && !go1.9
+// +build go1.8,!go1.9
+
+package obj
+
+//golang 1.8 not support inline
+type InlinedCall struct {
+}
+
+func InitInlinedCall(inl InlTreeNode, funcid uint8, namemap map[string]int, filetab []uint32) InlinedCall {
+	return InlinedCall{}
+}
diff --git a/inlinetree.1.9.go b/obj/inlinedcall.1.9.go
similarity index 58%
rename from inlinetree.1.9.go
rename to obj/inlinedcall.1.9.go
index f995f104..cd145462 100644
--- a/inlinetree.1.9.go
+++ b/obj/inlinedcall.1.9.go
@@ -1,24 +1,20 @@
 //go:build go1.9 && !go1.12
 // +build go1.9,!go1.12
 
-package goloader
-
-import (
-	"github.com/pkujhd/goloader/obj"
-)
+package obj
 
 // inlinedCall is the encoding of entries in the FUNCDATA_InlTree table.
-type inlinedCall struct {
+type InlinedCall struct {
 	parent int32 // index of parent in the inltree, or < 0
 	file   int32 // fileno index into filetab
 	line   int32 // line number of the call site
 	func_  int32 // offset into pclntab for name of called function
 }
 
-func (linker *Linker) initInlinedCall(inl obj.InlTreeNode, _func *_func) inlinedCall {
-	return inlinedCall{
+func InitInlinedCall(inl InlTreeNode, funcid uint8, namemap map[string]int, filetab []uint32) InlinedCall {
+	return InlinedCall{
 		parent: int32(inl.Parent),
-		file:   findFileTab(linker, inl.File),
+		file:   findFileTab(inl.File, namemap, filetab),
 		line:   int32(inl.Line),
-		func_:  int32(linker.namemap[inl.Func])}
+		func_:  int32(namemap[inl.Func])}
 }
diff --git a/obj/readobj.go b/obj/readobj.go
index 4db35568..a492919d 100644
--- a/obj/readobj.go
+++ b/obj/readobj.go
@@ -67,9 +67,3 @@ type Reloc struct {
 	Type   int
 	Add    int
 }
-
-func grow(bytes *[]byte, size int) {
-	if len(*bytes) < size {
-		*bytes = append(*bytes, make([]byte, size-len(*bytes))...)
-	}
-}
diff --git a/obj/utils.go b/obj/utils.go
new file mode 100644
index 00000000..f3bc97bf
--- /dev/null
+++ b/obj/utils.go
@@ -0,0 +1,17 @@
+package obj
+
+func findFileTab(filename string, namemap map[string]int, filetab []uint32) int32 {
+	tab := namemap[filename]
+	for index, value := range filetab {
+		if uint32(tab) == value {
+			return int32(index)
+		}
+	}
+	return -1
+}
+
+func grow(bytes *[]byte, size int) {
+	if len(*bytes) < size {
+		*bytes = append(*bytes, make([]byte, size-len(*bytes))...)
+	}
+}