diff --git a/src/cmd/asm/internal/asm/asm.go b/src/cmd/asm/internal/asm/asm.go
index 235fc9ea86..0c52c904f5 100644
--- a/src/cmd/asm/internal/asm/asm.go
+++ b/src/cmd/asm/internal/asm/asm.go
@@ -221,7 +221,7 @@ func (p *Parser) asmData(word string, operands [][]lex.Token) {
 
 	switch valueAddr.Type {
 	case obj.TYPE_CONST:
-		nameAddr.Sym.WriteInt(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Offset)
+		nameAddr.Sym.WriteInt(p.ctxt, nameAddr.Offset, int(scale), valueAddr.Offset)
 	case obj.TYPE_FCONST:
 		switch scale {
 		case 4:
@@ -232,9 +232,9 @@ func (p *Parser) asmData(word string, operands [][]lex.Token) {
 			panic("bad float scale")
 		}
 	case obj.TYPE_SCONST:
-		nameAddr.Sym.WriteString(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Val.(string))
+		nameAddr.Sym.WriteString(p.ctxt, nameAddr.Offset, int(scale), valueAddr.Val.(string))
 	case obj.TYPE_ADDR:
-		nameAddr.Sym.WriteAddr(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Sym, valueAddr.Offset)
+		nameAddr.Sym.WriteAddr(p.ctxt, nameAddr.Offset, int(scale), valueAddr.Sym, valueAddr.Offset)
 	}
 }
 
diff --git a/src/cmd/compile/internal/gc/obj.go b/src/cmd/compile/internal/gc/obj.go
index 3014a927ed..91d0ac87d5 100644
--- a/src/cmd/compile/internal/gc/obj.go
+++ b/src/cmd/compile/internal/gc/obj.go
@@ -279,19 +279,19 @@ func dgostrlitptr(s *Sym, off int, lit *string) int {
 	}
 	off = int(Rnd(int64(off), int64(Widthptr)))
 	symhdr, _ := stringsym(*lit)
-	Linksym(s).WriteAddr(Ctxt, int64(off), int64(Widthptr), Linksym(symhdr), 0)
+	Linksym(s).WriteAddr(Ctxt, int64(off), Widthptr, Linksym(symhdr), 0)
 	off += Widthptr
 	return off
 }
 
 func dsname(s *Sym, off int, t string) int {
-	Linksym(s).WriteString(Ctxt, int64(off), int64(len(t)), t)
+	Linksym(s).WriteString(Ctxt, int64(off), len(t), t)
 	return off + len(t)
 }
 
 func dsymptr(s *Sym, off int, x *Sym, xoff int) int {
 	off = int(Rnd(int64(off), int64(Widthptr)))
-	Linksym(s).WriteAddr(Ctxt, int64(off), int64(Widthptr), Linksym(x), int64(xoff))
+	Linksym(s).WriteAddr(Ctxt, int64(off), Widthptr, Linksym(x), int64(xoff))
 	off += Widthptr
 	return off
 }
@@ -315,7 +315,7 @@ func gdata(nam *Node, nr *Node, wid int) {
 
 		case CTINT, CTRUNE, CTBOOL:
 			i, _ := nr.IntLiteral()
-			Linksym(nam.Sym).WriteInt(Ctxt, nam.Xoffset, int64(wid), i)
+			Linksym(nam.Sym).WriteInt(Ctxt, nam.Xoffset, wid, i)
 
 		case CTFLT:
 			s := Linksym(nam.Sym)
@@ -336,13 +336,13 @@ func gdata(nam *Node, nr *Node, wid int) {
 			Fatalf("gdata ADDR left op %s", opnames[nr.Left.Op])
 		}
 		to := nr.Left
-		Linksym(nam.Sym).WriteAddr(Ctxt, nam.Xoffset, int64(wid), Linksym(to.Sym), to.Xoffset)
+		Linksym(nam.Sym).WriteAddr(Ctxt, nam.Xoffset, wid, Linksym(to.Sym), to.Xoffset)
 
 	case ONAME:
 		if nr.Class != PFUNC {
 			Fatalf("gdata NAME not PFUNC %d", nr.Class)
 		}
-		Linksym(nam.Sym).WriteAddr(Ctxt, nam.Xoffset, int64(wid), Linksym(funcsym(nr.Sym)), nr.Xoffset)
+		Linksym(nam.Sym).WriteAddr(Ctxt, nam.Xoffset, wid, Linksym(funcsym(nr.Sym)), nr.Xoffset)
 
 	default:
 		Fatalf("gdata unhandled op %v %v\n", nr, opnames[nr.Op])
@@ -368,6 +368,6 @@ func gdatacomplex(nam *Node, cval *Mpcplx) {
 func gdatastring(nam *Node, sval string) {
 	s := Linksym(nam.Sym)
 	_, symdata := stringsym(sval)
-	s.WriteAddr(Ctxt, nam.Xoffset, Types[Tptr].Width, Linksym(symdata), 0)
-	s.WriteInt(Ctxt, nam.Xoffset+int64(Widthptr), int64(Widthint), int64(len(sval)))
+	s.WriteAddr(Ctxt, nam.Xoffset, Widthptr, Linksym(symdata), 0)
+	s.WriteInt(Ctxt, nam.Xoffset+int64(Widthptr), Widthint, int64(len(sval)))
 }
diff --git a/src/cmd/internal/obj/data.go b/src/cmd/internal/obj/data.go
index e6d116610c..ade79faac7 100644
--- a/src/cmd/internal/obj/data.go
+++ b/src/cmd/internal/obj/data.go
@@ -53,14 +53,14 @@ func Symgrow(ctxt *Link, s *LSym, lsiz int64) {
 }
 
 // prepwrite prepares to write data of size siz into s at offset off.
-func (s *LSym) prepwrite(ctxt *Link, off, siz int64) {
+func (s *LSym) prepwrite(ctxt *Link, off int64, siz int) {
 	if off < 0 || siz < 0 || off >= 1<<30 {
 		log.Fatalf("prepwrite: bad off=%d siz=%d", off, siz)
 	}
 	if s.Type == SBSS || s.Type == STLSBSS {
 		ctxt.Diag("cannot supply data for BSS var")
 	}
-	Symgrow(ctxt, s, off+siz)
+	Symgrow(ctxt, s, off+int64(siz))
 }
 
 // WriteFloat32 writes f into s at offset off.
@@ -76,7 +76,7 @@ func (s *LSym) WriteFloat64(ctxt *Link, off int64, f float64) {
 }
 
 // WriteInt writes an integer i of size siz into s at offset off.
-func (s *LSym) WriteInt(ctxt *Link, off, siz int64, i int64) {
+func (s *LSym) WriteInt(ctxt *Link, off int64, siz int, i int64) {
 	s.prepwrite(ctxt, off, siz)
 	switch siz {
 	default:
@@ -94,8 +94,8 @@ func (s *LSym) WriteInt(ctxt *Link, off, siz int64, i int64) {
 
 // WriteAddr writes an address of size siz into s at offset off.
 // rsym and roff specify the relocation for the address.
-func (s *LSym) WriteAddr(ctxt *Link, off, siz int64, rsym *LSym, roff int64) {
-	if siz != int64(ctxt.Arch.Ptrsize) {
+func (s *LSym) WriteAddr(ctxt *Link, off int64, siz int, rsym *LSym, roff int64) {
+	if siz != ctxt.Arch.Ptrsize {
 		ctxt.Diag("WriteAddr: bad address size: %d", siz)
 	}
 	s.prepwrite(ctxt, off, siz)
@@ -108,12 +108,12 @@ func (s *LSym) WriteAddr(ctxt *Link, off, siz int64, rsym *LSym, roff int64) {
 }
 
 // WriteString writes a string of size siz into s at offset off.
-func (s *LSym) WriteString(ctxt *Link, off, siz int64, str string) {
-	if siz < int64(len(str)) {
+func (s *LSym) WriteString(ctxt *Link, off int64, siz int, str string) {
+	if siz < len(str) {
 		ctxt.Diag("WriteString: bad string size: %d < %d", siz, len(str))
 	}
 	s.prepwrite(ctxt, off, siz)
-	copy(s.P[off:off+siz], str)
+	copy(s.P[off:off+int64(siz)], str)
 }
 
 func Addrel(s *LSym) *Reloc {