cmd/link: remove some dead code

Change-Id: I125a12a2cb7e792f357e4d841f55c0bed2971dce
Reviewed-on: https://go-review.googlesource.com/14140
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

src/cmd/link/internal/amd64/asm.go

@@ -42,8 +42,6 @@ func PADDR(x uint32) uint32 {
 	return x &^ 0x80000000
 }
 
-var zeroes string
-
 func Addcall(ctxt *ld.Link, s *ld.LSym, t *ld.LSym) int64 {
 	s.Reachable = true
 	i := s.Size

src/cmd/link/internal/arm/l.go

@@ -64,9 +64,6 @@ package arm
 
 const (
 	thechar   = '5'
-	PtrSize   = 4
-	IntSize   = 4
-	RegSize   = 4
 	MaxAlign  = 8 // max data alignment
 	FuncAlign = 4 // single-instruction alignment
 	MINLC     = 4

src/cmd/link/internal/arm64/l.go

@@ -63,9 +63,6 @@ package arm64
 
 const (
 	thechar   = '7'
-	PtrSize   = 8
-	IntSize   = 8
-	RegSize   = 8
 	MaxAlign  = 32 // max data alignment
 	FuncAlign = 8
 	MINLC     = 4

src/cmd/link/internal/ld/ar.go

@@ -32,13 +32,11 @@ package ld
 
 const (
 	SARMAG  = 8
-	SARNAME = 16
 	SAR_HDR = 16 + 44
 )
 
 const (
-	ARMAG  = "!<arch>\n"
-	ARFMAG = "`\n"
+	ARMAG = "!<arch>\n"
 )
 
 type ArHdr struct {

src/cmd/link/internal/ld/lib.go

@@ -142,7 +142,6 @@ var (
 // use in debuggers and such.
 
 const (
-	MAXIO   = 8192
 	MINFUNC = 16 // minimum size for a function
 )
 
@@ -241,12 +240,6 @@ var coutbuf struct {
 	f *os.File
 }
 
-const (
-	// Whether to assume that the external linker is "gold"
-	// (http://sourceware.org/ml/binutils/2008-03/msg00162.html).
-	AssumeGoldLinker = 0
-)
-
 const (
 	symname = "__.GOSYMDEF"
 	pkgname = "__.PKGDEF"
@@ -965,10 +958,6 @@ func hostlink() {
 		}
 	}
 
-	if Iself && AssumeGoldLinker != 0 /*TypeKind(100016)*/ {
-		argv = append(argv, "-Wl,--rosegment")
-	}
-
 	switch Buildmode {
 	case BuildmodeExe:
 		if HEADTYPE == obj.Hdarwin {
@@ -1473,10 +1462,6 @@ func Be32(b []byte) uint32 {
 	return uint32(b[0])<<24 | uint32(b[1])<<16 | uint32(b[2])<<8 | uint32(b[3])
 }
 
-func Be64(b []byte) uint64 {
-	return uint64(Be32(b))<<32 | uint64(Be32(b[4:]))
-}
-
 type Chain struct {
 	sym   *LSym
 	up    *Chain
@@ -1688,33 +1673,6 @@ func stkprint(ch *Chain, limit int) {
 	}
 }
 
-func Yconv(s *LSym) string {
-	var fp string
-
-	if s == nil {
-		fp += fmt.Sprintf("<nil>")
-	} else {
-		fmt_ := ""
-		fmt_ += fmt.Sprintf("%s @0x%08x [%d]", s.Name, int64(s.Value), int64(s.Size))
-		for i := 0; int64(i) < s.Size; i++ {
-			if i%8 == 0 {
-				fmt_ += fmt.Sprintf("\n\t0x%04x ", i)
-			}
-			fmt_ += fmt.Sprintf("%02x ", s.P[i])
-		}
-
-		fmt_ += fmt.Sprintf("\n")
-		for i := 0; i < len(s.R); i++ {
-			fmt_ += fmt.Sprintf("\t0x%04x[%x] %d %s[%x]\n", s.R[i].Off, s.R[i].Siz, s.R[i].Type, s.R[i].Sym.Name, int64(s.R[i].Add))
-		}
-
-		str := fmt_
-		fp += str
-	}
-
-	return fp
-}
-
 func Cflush() {
 	if err := coutbuf.Writer.Flush(); err != nil {
 		Exitf("flushing %s: %v", coutbuf.f.Name(), err)

src/cmd/link/internal/ld/link.go

@@ -209,10 +209,6 @@ const (
 	RV_TYPE_MASK      = RV_CHECK_OVERFLOW - 1
 )
 
-const (
-	LINKHASH = 100003
-)
-
 // Pcdata iterator.
 //	for(pciterinit(ctxt, &it, &pcd); !it.done; pciternext(&it)) { it.value holds in [it.pc, it.nextpc) }
 

src/cmd/link/internal/ld/sym.go

@@ -39,10 +39,6 @@ import (
 	"strconv"
 )
 
-func yy_isalpha(c int) bool {
-	return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z'
-}
-
 var headers = []struct {
 	name string
 	val  int

src/cmd/link/internal/ld/textflag.go

-// 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.
-
-package ld
-
-// This file defines flags attached to various functions
-// and data objects.  The compilers, assemblers, and linker must
-// all agree on these values.
-
-const (
-	// Don't profile the marked routine.
-	//
-	// Deprecated: Not implemented, do not use.
-	NOPROF = 1
-	// It is ok for the linker to get multiple of these symbols.  It will
-	// pick one of the duplicates to use.
-	DUPOK = 2
-	// Don't insert stack check preamble.
-	NOSPLIT = 4
-	// Put this data in a read-only section.
-	RODATA = 8
-	// This data contains no pointers.
-	NOPTR = 16
-	// This is a wrapper function and should not count as disabling 'recover'.
-	WRAPPER = 32
-	// This function uses its incoming context register.
-	NEEDCTXT = 64
-)

src/cmd/link/internal/ld/util.go

@@ -67,24 +67,6 @@ func tokenize(s string) []string {
 	return f
 }
 
-func cutStringAtNUL(s string) string {
-	if i := strings.Index(s, "\x00"); i >= 0 {
-		s = s[:i]
-	}
-	return s
-}
-
-func Access(name string, mode int) int {
-	if mode != 0 {
-		panic("bad access")
-	}
-	_, err := os.Stat(name)
-	if err != nil {
-		return -1
-	}
-	return 0
-}
-
 // strings.Compare, introduced in Go 1.5.
 func stringsCompare(a, b string) int {
 	if a == b {

src/cmd/link/internal/ppc64/l.go

@@ -63,9 +63,6 @@ package ppc64
 
 const (
 	thechar   = '9'
-	PtrSize   = 8
-	IntSize   = 8
-	RegSize   = 8
 	MaxAlign  = 32 // max data alignment
 	FuncAlign = 8
 	MINLC     = 4

src/cmd/link/internal/x86/l.go

@@ -33,8 +33,6 @@ package x86
 const (
 	thechar   = '8'
 	PtrSize   = 4
-	IntSize   = 4
-	RegSize   = 4
 	MaxAlign  = 32 // max data alignment
 	FuncAlign = 16
 	MINLC     = 1