cmd/link: move Headtype global to ctxt

For #22095

Change-Id: Idcfdfe8a94db8626392658bb93429454238f648a
Reviewed-on: https://go-review.googlesource.com/70835
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

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

@@ -251,7 +251,7 @@ func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
 
 	case objabi.R_ADDR:
 		if s.Type == sym.STEXT && ctxt.IsELF {
-			if ld.Headtype == objabi.Hsolaris {
+			if ctxt.HeadType == objabi.Hsolaris {
 				addpltsym(ctxt, targ)
 				r.Sym = ctxt.Syms.Lookup(".plt", 0)
 				r.Add += int64(targ.Plt)
@@ -334,7 +334,7 @@ func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
 			return true
 		}
 
-		if ld.Headtype == objabi.Hdarwin && s.Size == int64(ctxt.Arch.PtrSize) && r.Off == 0 {
+		if ctxt.HeadType == objabi.Hdarwin && s.Size == int64(ctxt.Arch.PtrSize) && r.Off == 0 {
 			// Mach-O relocations are a royal pain to lay out.
 			// They use a compact stateful bytecode representation
 			// that is too much bother to deal with.
@@ -603,7 +603,7 @@ func addpltsym(ctxt *ld.Link, s *sym.Symbol) {
 		rela.AddUint64(ctxt.Arch, 0)
 
 		s.Plt = int32(plt.Size - 16)
-	} else if ld.Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		// To do lazy symbol lookup right, we're supposed
 		// to tell the dynamic loader which library each
 		// symbol comes from and format the link info
@@ -645,7 +645,7 @@ func addgotsym(ctxt *ld.Link, s *sym.Symbol) {
 		rela.AddAddrPlus(ctxt.Arch, got, int64(s.Got))
 		rela.AddUint64(ctxt.Arch, ld.ELF64_R_INFO(uint32(s.Dynid), uint32(elf.R_X86_64_GLOB_DAT)))
 		rela.AddUint64(ctxt.Arch, 0)
-	} else if ld.Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		ctxt.Syms.Lookup(".linkedit.got", 0).AddUint32(ctxt.Arch, uint32(s.Dynid))
 	} else {
 		ld.Errorf(s, "addgotsym: unsupported binary format")
@@ -700,13 +700,13 @@ func asmb(ctxt *ld.Link) {
 	ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
 
 	machlink := int64(0)
-	if ld.Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		machlink = ld.Domacholink(ctxt)
 	}
 
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Errorf(nil, "unknown header type %v", ld.Headtype)
+		ld.Errorf(nil, "unknown header type %v", ctxt.HeadType)
 		fallthrough
 
 	case objabi.Hplan9:
@@ -736,7 +736,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 		case objabi.Hplan9:
 			*ld.FlagS = true
@@ -761,7 +761,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(symo)
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				ctxt.Out.SeekSet(symo)
@@ -805,7 +805,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f headr\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan9 */
 		magic := int32(4*26*26 + 7)

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

@@ -74,9 +74,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32 + 8

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

@@ -590,7 +590,7 @@ func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val *int64) bool {
 			// the section load address.
 			// we need to compensate that by removing the instruction's address
 			// from addend.
-			if ld.Headtype == objabi.Hdarwin {
+			if ctxt.HeadType == objabi.Hdarwin {
 				r.Xadd -= ld.Symaddr(s) + int64(r.Off)
 			}
 
@@ -781,7 +781,7 @@ func asmb(ctxt *ld.Link) {
 	ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
 
 	machlink := uint32(0)
-	if ld.Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		machlink = uint32(ld.Domacholink(ctxt))
 	}
 
@@ -795,7 +795,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
@@ -810,7 +810,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(int64(symo))
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				if ctxt.Debugvlog != 0 {
@@ -847,7 +847,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f header\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan 9 */
 		ctxt.Out.Write32b(0x647)                      /* magic */

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

@@ -70,9 +70,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32

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

@@ -273,7 +273,7 @@ func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val *int64) bool {
 			// the BR26 relocation should be fully resolved at link time.
 			// That is the reason why the next if block is disabled. When the bug in ld64
 			// is fixed, we can enable this block and also enable duff's device in cmd/7g.
-			if false && ld.Headtype == objabi.Hdarwin {
+			if false && ctxt.HeadType == objabi.Hdarwin {
 				var o0, o1 uint32
 
 				if ctxt.Arch.ByteOrder == binary.BigEndian {
@@ -346,8 +346,8 @@ func archreloc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val *int64) bool {
 		return true
 	case objabi.R_ARM64_TLS_LE:
 		r.Done = false
-		if ld.Headtype != objabi.Hlinux {
-			ld.Errorf(s, "TLS reloc on unsupported OS %v", ld.Headtype)
+		if ctxt.HeadType != objabi.Hlinux {
+			ld.Errorf(s, "TLS reloc on unsupported OS %v", ctxt.HeadType)
 		}
 		// The TCB is two pointers. This is not documented anywhere, but is
 		// de facto part of the ABI.
@@ -417,7 +417,7 @@ func asmb(ctxt *ld.Link) {
 	ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
 
 	machlink := uint32(0)
-	if ld.Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		machlink = uint32(ld.Domacholink(ctxt))
 	}
 
@@ -431,7 +431,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
@@ -446,7 +446,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(int64(symo))
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				if ctxt.Debugvlog != 0 {
@@ -483,7 +483,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f header\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan 9 */
 		ctxt.Out.Write32(0x647)                      /* magic */

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

@@ -70,9 +70,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32

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

@@ -148,7 +148,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 
 		// We need to be able to reference dynimport symbols when linking against
 		// shared libraries, and Solaris needs it always
-		if Headtype != objabi.Hsolaris && r.Sym != nil && r.Sym.Type == sym.SDYNIMPORT && !ctxt.DynlinkingGo() {
+		if ctxt.HeadType != objabi.Hsolaris && r.Sym != nil && r.Sym.Type == sym.SDYNIMPORT && !ctxt.DynlinkingGo() {
 			if !(ctxt.Arch.Family == sys.PPC64 && ctxt.LinkMode == LinkExternal && r.Sym.Name == ".TOC.") {
 				Errorf(s, "unhandled relocation for %s (type %d (%s) rtype %d (%s))", r.Sym.Name, r.Sym.Type, r.Sym.Type, r.Type, sym.RelocName(ctxt.Arch, r.Type))
 			}
@@ -212,12 +212,12 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 				// related to the fact that our own TLS storage happens
 				// to take up 8 bytes.
 				o = 8 + r.Sym.Value
-			} else if ctxt.IsELF || Headtype == objabi.Hplan9 || Headtype == objabi.Hdarwin || isAndroidX86 {
+			} else if ctxt.IsELF || ctxt.HeadType == objabi.Hplan9 || ctxt.HeadType == objabi.Hdarwin || isAndroidX86 {
 				o = int64(ctxt.Tlsoffset) + r.Add
-			} else if Headtype == objabi.Hwindows {
+			} else if ctxt.HeadType == objabi.Hwindows {
 				o = r.Add
 			} else {
-				log.Fatalf("unexpected R_TLS_LE relocation for %v", Headtype)
+				log.Fatalf("unexpected R_TLS_LE relocation for %v", ctxt.HeadType)
 			}
 		case objabi.R_TLS_IE:
 			isAndroidX86 := objabi.GOOS == "android" && (ctxt.Arch.InFamily(sys.AMD64, sys.I386))
@@ -272,7 +272,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 					if ctxt.Arch.Family == sys.AMD64 {
 						o = 0
 					}
-				} else if Headtype == objabi.Hdarwin {
+				} else if ctxt.HeadType == objabi.Hdarwin {
 					// ld64 for arm64 has a bug where if the address pointed to by o exists in the
 					// symbol table (dynid >= 0), or is inside a symbol that exists in the symbol
 					// table, then it will add o twice into the relocated value.
@@ -286,10 +286,10 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 							o += Symaddr(rs)
 						}
 					}
-				} else if Headtype == objabi.Hwindows {
+				} else if ctxt.HeadType == objabi.Hwindows {
 					// nothing to do
 				} else {
-					Errorf(s, "unhandled pcrel relocation to %s on %v", rs.Name, Headtype)
+					Errorf(s, "unhandled pcrel relocation to %s on %v", rs.Name, ctxt.HeadType)
 				}
 
 				break
@@ -319,7 +319,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 				// DWARF linking, and it understands how to follow section offsets.
 				// Leaving in the relocation records confuses it (see
 				// https://golang.org/issue/22068) so drop them for Darwin.
-				if Headtype == objabi.Hdarwin {
+				if ctxt.HeadType == objabi.Hdarwin {
 					r.Done = true
 				}
 
@@ -328,7 +328,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 				// IMAGE_REL_I386_DIR32, IMAGE_REL_AMD64_ADDR64 and IMAGE_REL_AMD64_ADDR32.
 				// Do not replace R_DWARFREF with R_ADDR for windows -
 				// let PE code emit correct relocations.
-				if Headtype != objabi.Hwindows {
+				if ctxt.HeadType != objabi.Hwindows {
 					r.Type = objabi.R_ADDR
 				}
 
@@ -359,7 +359,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 
 			// r->sym can be null when CALL $(constant) is transformed from absolute PC to relative PC call.
 		case objabi.R_GOTPCREL:
-			if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin && r.Sym != nil && r.Sym.Type != sym.SCONST {
+			if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin && r.Sym != nil && r.Sym.Type != sym.SCONST {
 				r.Done = false
 				r.Xadd = r.Add
 				r.Xadd -= int64(r.Siz) // relative to address after the relocated chunk
@@ -394,7 +394,7 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 					if ctxt.Arch.Family == sys.AMD64 {
 						o = 0
 					}
-				} else if Headtype == objabi.Hdarwin {
+				} else if ctxt.HeadType == objabi.Hdarwin {
 					if r.Type == objabi.R_CALL {
 						if rs.Type != sym.SHOSTOBJ {
 							o += int64(uint64(Symaddr(rs)) - rs.Sect.Vaddr)
@@ -406,12 +406,12 @@ func relocsym(ctxt *Link, s *sym.Symbol) {
 					} else {
 						o += int64(r.Siz)
 					}
-				} else if Headtype == objabi.Hwindows && ctxt.Arch.Family == sys.AMD64 { // only amd64 needs PCREL
+				} else if ctxt.HeadType == objabi.Hwindows && ctxt.Arch.Family == sys.AMD64 { // only amd64 needs PCREL
 					// PE/COFF's PC32 relocation uses the address after the relocated
 					// bytes as the base. Compensate by skewing the addend.
 					o += int64(r.Siz)
 				} else {
-					Errorf(s, "unhandled pcrel relocation to %s on %v", rs.Name, Headtype)
+					Errorf(s, "unhandled pcrel relocation to %s on %v", rs.Name, ctxt.HeadType)
 				}
 
 				break
@@ -531,7 +531,7 @@ func windynrelocsym(ctxt *Link, s *sym.Symbol) {
 }
 
 func dynrelocsym(ctxt *Link, s *sym.Symbol) {
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		if ctxt.LinkMode == LinkInternal {
 			windynrelocsym(ctxt, s)
 		}
@@ -561,7 +561,7 @@ func dynrelocsym(ctxt *Link, s *sym.Symbol) {
 func dynreloc(ctxt *Link, data *[sym.SXREF][]*sym.Symbol) {
 	// -d suppresses dynamic loader format, so we may as well not
 	// compute these sections or mark their symbols as reachable.
-	if *FlagD && Headtype != objabi.Hwindows {
+	if *FlagD && ctxt.HeadType != objabi.Hwindows {
 		return
 	}
 	if ctxt.Debugvlog != 0 {
@@ -1009,7 +1009,7 @@ func (ctxt *Link) dodata() {
 		ctxt.Logf("%5.2f dodata\n", Cputime())
 	}
 
-	if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin {
+	if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin {
 		// The values in moduledata are filled out by relocations
 		// pointing to the addresses of these special symbols.
 		// Typically these symbols have no size and are not laid
@@ -1067,7 +1067,7 @@ func (ctxt *Link) dodata() {
 	// symbol, which is itself data.
 	//
 	// On darwin, we need the symbol table numbers for dynreloc.
-	if Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		machosymorder(ctxt)
 	}
 	dynreloc(ctxt, &data)
@@ -1612,7 +1612,7 @@ func (ctxt *Link) dodata() {
 }
 
 func dodataSect(ctxt *Link, symn sym.SymKind, syms []*sym.Symbol) (result []*sym.Symbol, maxAlign int32) {
-	if Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		// Some symbols may no longer belong in syms
 		// due to movement in machosymorder.
 		newSyms := make([]*sym.Symbol, 0, len(syms))
@@ -1643,7 +1643,7 @@ func dodataSect(ctxt *Link, symn sym.SymKind, syms []*sym.Symbol) (result []*sym
 		// If the usually-special section-marker symbols are being laid
 		// out as regular symbols, put them either at the beginning or
 		// end of their section.
-		if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin {
+		if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin {
 			switch s.Name {
 			case "runtime.text", "runtime.bss", "runtime.data", "runtime.types":
 				head = s
@@ -1764,7 +1764,7 @@ func (ctxt *Link) textaddress() {
 	text := ctxt.Syms.Lookup("runtime.text", 0)
 	text.Sect = sect
 
-	if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin {
+	if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin {
 		etext := ctxt.Syms.Lookup("runtime.etext", 0)
 		etext.Sect = sect
 
@@ -1873,7 +1873,7 @@ func (ctxt *Link) address() {
 
 	Segtext.Length = va - uint64(*FlagTextAddr)
 	Segtext.Filelen = Segtext.Length
-	if Headtype == objabi.Hnacl {
+	if ctxt.HeadType == objabi.Hnacl {
 		va += 32 // room for the "halt sled"
 	}
 
@@ -1930,10 +1930,10 @@ func (ctxt *Link) address() {
 	Segdata.Vaddr = va
 	Segdata.Fileoff = va - Segtext.Vaddr + Segtext.Fileoff
 	Segdata.Filelen = 0
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		Segdata.Fileoff = Segtext.Fileoff + uint64(Rnd(int64(Segtext.Length), PEFILEALIGN))
 	}
-	if Headtype == objabi.Hplan9 {
+	if ctxt.HeadType == objabi.Hplan9 {
 		Segdata.Fileoff = Segtext.Fileoff + Segtext.Filelen
 	}
 	var data *sym.Section
@@ -1972,7 +1972,7 @@ func (ctxt *Link) address() {
 	Segdwarf.Vaddr = va
 	Segdwarf.Fileoff = Segdata.Fileoff + uint64(Rnd(int64(Segdata.Filelen), int64(*FlagRound)))
 	Segdwarf.Filelen = 0
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		Segdwarf.Fileoff = Segdata.Fileoff + uint64(Rnd(int64(Segdata.Filelen), int64(PEFILEALIGN)))
 	}
 	for i, s := range Segdwarf.Sections {
@@ -1982,7 +1982,7 @@ func (ctxt *Link) address() {
 		}
 		s.Vaddr = va
 		va += uint64(vlen)
-		if Headtype == objabi.Hwindows {
+		if ctxt.HeadType == objabi.Hwindows {
 			va = uint64(Rnd(int64(va), PEFILEALIGN))
 		}
 		Segdwarf.Length = va - Segdwarf.Vaddr

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

@@ -222,7 +222,7 @@ func (d *deadcodepass) init() {
 		} else {
 			// The external linker refers main symbol directly.
 			if d.ctxt.LinkMode == LinkExternal && (d.ctxt.BuildMode == BuildModeExe || d.ctxt.BuildMode == BuildModePIE) {
-				if Headtype == objabi.Hwindows && d.ctxt.Arch.Family == sys.I386 {
+				if d.ctxt.HeadType == objabi.Hwindows && d.ctxt.Arch.Family == sys.I386 {
 					*flagEntrySymbol = "_main"
 				} else {
 					*flagEntrySymbol = "main"

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

@@ -1463,7 +1463,7 @@ func writepub(ctxt *Link, sname string, ispub func(*dwarf.DWDie) bool, syms []*s
 }
 
 func writegdbscript(ctxt *Link, syms []*sym.Symbol) []*sym.Symbol {
-	if ctxt.LinkMode == LinkExternal && Headtype == objabi.Hwindows && ctxt.BuildMode == BuildModeCArchive {
+	if ctxt.LinkMode == LinkExternal && ctxt.HeadType == objabi.Hwindows && ctxt.BuildMode == BuildModeCArchive {
 		// gcc on Windows places .debug_gdb_scripts in the wrong location, which
 		// causes the program not to run. See https://golang.org/issue/20183
 		// Non c-archives can avoid this issue via a linker script
@@ -1499,18 +1499,18 @@ func dwarfgeneratedebugsyms(ctxt *Link) {
 	if *FlagW { // disable dwarf
 		return
 	}
-	if *FlagS && Headtype != objabi.Hdarwin {
+	if *FlagS && ctxt.HeadType != objabi.Hdarwin {
 		return
 	}
-	if Headtype == objabi.Hplan9 {
+	if ctxt.HeadType == objabi.Hplan9 {
 		return
 	}
 
 	if ctxt.LinkMode == LinkExternal {
 		switch {
 		case ctxt.IsELF:
-		case Headtype == objabi.Hdarwin:
-		case Headtype == objabi.Hwindows:
+		case ctxt.HeadType == objabi.Hdarwin:
+		case ctxt.HeadType == objabi.Hwindows:
 		default:
 			return
 		}

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

@@ -516,7 +516,7 @@ func Elfinit(ctxt *Link) {
 	case sys.ARM, sys.MIPS:
 		if ctxt.Arch.Family == sys.ARM {
 			// we use EABI on linux/arm, freebsd/arm, netbsd/arm.
-			if Headtype == objabi.Hlinux || Headtype == objabi.Hfreebsd || Headtype == objabi.Hnetbsd {
+			if ctxt.HeadType == objabi.Hlinux || ctxt.HeadType == objabi.Hfreebsd || ctxt.HeadType == objabi.Hnetbsd {
 				// We set a value here that makes no indication of which
 				// float ABI the object uses, because this is information
 				// used by the dynamic linker to compare executables and
@@ -1450,10 +1450,10 @@ func (ctxt *Link) doelf() {
 	if !*FlagD || ctxt.LinkMode == LinkExternal {
 		Addstring(shstrtab, ".tbss")
 	}
-	if Headtype == objabi.Hnetbsd {
+	if ctxt.HeadType == objabi.Hnetbsd {
 		Addstring(shstrtab, ".note.netbsd.ident")
 	}
-	if Headtype == objabi.Hopenbsd {
+	if ctxt.HeadType == objabi.Hopenbsd {
 		Addstring(shstrtab, ".note.openbsd.ident")
 	}
 	if len(buildinfo) > 0 {
@@ -1826,7 +1826,7 @@ func Asmbelf(ctxt *Link, symo int64) {
 	 * segment boundaries downwards to include it.
 	 * Except on NaCl where it must not be loaded.
 	 */
-	if Headtype != objabi.Hnacl {
+	if ctxt.HeadType != objabi.Hnacl {
 		o := int64(Segtext.Vaddr - pph.vaddr)
 		Segtext.Vaddr -= uint64(o)
 		Segtext.Length += uint64(o)
@@ -1843,7 +1843,7 @@ func Asmbelf(ctxt *Link, symo int64) {
 		sh.flags = SHF_ALLOC
 		sh.addralign = 1
 		if interpreter == "" {
-			switch Headtype {
+			switch ctxt.HeadType {
 			case objabi.Hlinux:
 				interpreter = Thearch.Linuxdynld
 
@@ -1873,9 +1873,9 @@ func Asmbelf(ctxt *Link, symo int64) {
 	}
 
 	pnote = nil
-	if Headtype == objabi.Hnetbsd || Headtype == objabi.Hopenbsd {
+	if ctxt.HeadType == objabi.Hnetbsd || ctxt.HeadType == objabi.Hopenbsd {
 		var sh *ElfShdr
-		switch Headtype {
+		switch ctxt.HeadType {
 		case objabi.Hnetbsd:
 			sh = elfshname(".note.netbsd.ident")
 			resoff -= int64(elfnetbsdsig(sh, uint64(startva), uint64(resoff)))
@@ -2087,7 +2087,7 @@ func Asmbelf(ctxt *Link, symo int64) {
 		}
 	}
 
-	if Headtype == objabi.Hlinux {
+	if ctxt.HeadType == objabi.Hlinux {
 		ph := newElfPhdr()
 		ph.type_ = PT_GNU_STACK
 		ph.flags = PF_W + PF_R
@@ -2097,7 +2097,7 @@ func Asmbelf(ctxt *Link, symo int64) {
 		ph.type_ = PT_PAX_FLAGS
 		ph.flags = 0x2a00 // mprotect, randexec, emutramp disabled
 		ph.align = uint64(ctxt.Arch.RegSize)
-	} else if Headtype == objabi.Hsolaris {
+	} else if ctxt.HeadType == objabi.Hsolaris {
 		ph := newElfPhdr()
 		ph.type_ = PT_SUNWSTACK
 		ph.flags = PF_W + PF_R
@@ -2181,13 +2181,13 @@ elfobj:
 	eh.ident[EI_MAG1] = 'E'
 	eh.ident[EI_MAG2] = 'L'
 	eh.ident[EI_MAG3] = 'F'
-	if Headtype == objabi.Hfreebsd {
+	if ctxt.HeadType == objabi.Hfreebsd {
 		eh.ident[EI_OSABI] = ELFOSABI_FREEBSD
-	} else if Headtype == objabi.Hnetbsd {
+	} else if ctxt.HeadType == objabi.Hnetbsd {
 		eh.ident[EI_OSABI] = ELFOSABI_NETBSD
-	} else if Headtype == objabi.Hopenbsd {
+	} else if ctxt.HeadType == objabi.Hopenbsd {
 		eh.ident[EI_OSABI] = ELFOSABI_OPENBSD
-	} else if Headtype == objabi.Hdragonfly {
+	} else if ctxt.HeadType == objabi.Hdragonfly {
 		eh.ident[EI_OSABI] = ELFOSABI_NONE
 	}
 	if elf64 {
@@ -2230,10 +2230,10 @@ elfobj:
 		a += int64(elfwriteinterp(ctxt.Out))
 	}
 	if ctxt.LinkMode != LinkExternal {
-		if Headtype == objabi.Hnetbsd {
+		if ctxt.HeadType == objabi.Hnetbsd {
 			a += int64(elfwritenetbsdsig(ctxt.Out))
 		}
-		if Headtype == objabi.Hopenbsd {
+		if ctxt.HeadType == objabi.Hopenbsd {
 			a += int64(elfwriteopenbsdsig(ctxt.Out))
 		}
 		if len(buildinfo) > 0 {

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

@@ -171,7 +171,7 @@ func loadcgo(ctxt *Link, file string, pkg string, p string) {
 				// to force a link of foo.so.
 				havedynamic = 1
 
-				if Headtype == objabi.Hdarwin {
+				if ctxt.HeadType == objabi.Hdarwin {
 					machoadddynlib(lib, ctxt.LinkMode)
 				} else {
 					dynlib = append(dynlib, lib)
@@ -316,9 +316,9 @@ func Adddynsym(ctxt *Link, s *sym.Symbol) {
 
 	if ctxt.IsELF {
 		elfadddynsym(ctxt, s)
-	} else if Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		Errorf(s, "adddynsym: missed symbol (Extname=%s)", s.Extname)
-	} else if Headtype == objabi.Hwindows {
+	} else if ctxt.HeadType == objabi.Hwindows {
 		// already taken care of
 	} else {
 		Errorf(s, "adddynsym: unsupported binary format")
@@ -358,7 +358,7 @@ func fieldtrack(ctxt *Link) {
 }
 
 func (ctxt *Link) addexport() {
-	if Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		return
 	}
 

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

@@ -170,9 +170,8 @@ var (
 	elfglobalsymndx int
 	interpreter     string
 
-	debug_s  bool // backup old value of debug['s']
-	HEADR    int32
-	Headtype objabi.HeadType
+	debug_s bool // backup old value of debug['s']
+	HEADR   int32
 
 	nerrors  int
 	liveness int64
@@ -382,11 +381,11 @@ func (ctxt *Link) loadlib() {
 	determineLinkMode(ctxt)
 
 	// Recalculate pe parameters now that we have ctxt.LinkMode set.
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		Peinit(ctxt)
 	}
 
-	if Headtype == objabi.Hdarwin && ctxt.LinkMode == LinkExternal {
+	if ctxt.HeadType == objabi.Hdarwin && ctxt.LinkMode == LinkExternal {
 		*FlagTextAddr = 0
 	}
 
@@ -522,7 +521,7 @@ func (ctxt *Link) loadlib() {
 			if *flagLibGCC != "none" {
 				hostArchive(ctxt, *flagLibGCC)
 			}
-			if Headtype == objabi.Hwindows {
+			if ctxt.HeadType == objabi.Hwindows {
 				if p := ctxt.findLibPath("libmingwex.a"); p != "none" {
 					hostArchive(ctxt, p)
 				}
@@ -557,7 +556,7 @@ func (ctxt *Link) loadlib() {
 	// Also leave it enabled on Solaris which doesn't support
 	// statically linked binaries.
 	if ctxt.BuildMode == BuildModeExe {
-		if havedynamic == 0 && Headtype != objabi.Hdarwin && Headtype != objabi.Hsolaris {
+		if havedynamic == 0 && ctxt.HeadType != objabi.Hdarwin && ctxt.HeadType != objabi.Hsolaris {
 			*FlagD = true
 		}
 	}
@@ -594,7 +593,7 @@ func (ctxt *Link) loadlib() {
 	}
 
 	if ctxt.Arch == sys.Arch386 {
-		if (ctxt.BuildMode == BuildModeCArchive && ctxt.IsELF) || (ctxt.BuildMode == BuildModeCShared && Headtype != objabi.Hwindows) || ctxt.BuildMode == BuildModePIE || ctxt.DynlinkingGo() {
+		if (ctxt.BuildMode == BuildModeCArchive && ctxt.IsELF) || (ctxt.BuildMode == BuildModeCShared && ctxt.HeadType != objabi.Hwindows) || ctxt.BuildMode == BuildModePIE || ctxt.DynlinkingGo() {
 			got := ctxt.Syms.Lookup("_GLOBAL_OFFSET_TABLE_", 0)
 			got.Type = sym.SDYNIMPORT
 			got.Attr |= sym.AttrReachable
@@ -866,7 +865,7 @@ var internalpkg = []string{
 	"runtime/msan",
 }
 
-func ldhostobj(ld func(*Link, *bio.Reader, string, int64, string), f *bio.Reader, pkg string, length int64, pn string, file string) *Hostobj {
+func ldhostobj(ld func(*Link, *bio.Reader, string, int64, string), headType objabi.HeadType, f *bio.Reader, pkg string, length int64, pn string, file string) *Hostobj {
 	isinternal := false
 	for i := 0; i < len(internalpkg); i++ {
 		if pkg == internalpkg[i] {
@@ -881,7 +880,7 @@ func ldhostobj(ld func(*Link, *bio.Reader, string, int64, string), f *bio.Reader
 	// force external linking for any libraries that link in code that
 	// uses errno. This can be removed if the Go linker ever supports
 	// these relocation types.
-	if Headtype == objabi.Hdragonfly {
+	if headType == objabi.Hdragonfly {
 		if pkg == "net" || pkg == "os/user" {
 			isinternal = false
 		}
@@ -1076,7 +1075,7 @@ func (ctxt *Link) hostlink() {
 
 	if !*FlagS && !debug_s {
 		argv = append(argv, "-gdwarf-2")
-	} else if Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		// Recent versions of macOS print
 		//	ld: warning: option -s is obsolete and being ignored
 		// so do not pass any arguments.
@@ -1084,7 +1083,7 @@ func (ctxt *Link) hostlink() {
 		argv = append(argv, "-s")
 	}
 
-	switch Headtype {
+	switch ctxt.HeadType {
 	case objabi.Hdarwin:
 		argv = append(argv, "-Wl,-headerpad,1144")
 		if ctxt.DynlinkingGo() {
@@ -1105,19 +1104,19 @@ func (ctxt *Link) hostlink() {
 
 	switch ctxt.BuildMode {
 	case BuildModeExe:
-		if Headtype == objabi.Hdarwin {
+		if ctxt.HeadType == objabi.Hdarwin {
 			argv = append(argv, "-Wl,-pagezero_size,4000000")
 		}
 	case BuildModePIE:
 		// ELF.
-		if Headtype != objabi.Hdarwin {
+		if ctxt.HeadType != objabi.Hdarwin {
 			if ctxt.UseRelro() {
 				argv = append(argv, "-Wl,-z,relro")
 			}
 			argv = append(argv, "-pie")
 		}
 	case BuildModeCShared:
-		if Headtype == objabi.Hdarwin {
+		if ctxt.HeadType == objabi.Hdarwin {
 			argv = append(argv, "-dynamiclib")
 			if ctxt.Arch.Family != sys.AMD64 {
 				argv = append(argv, "-Wl,-read_only_relocs,suppress")
@@ -1129,7 +1128,7 @@ func (ctxt *Link) hostlink() {
 				argv = append(argv, "-Wl,-z,relro")
 			}
 			argv = append(argv, "-shared")
-			if Headtype != objabi.Hwindows {
+			if ctxt.HeadType != objabi.Hwindows {
 				// Pass -z nodelete to mark the shared library as
 				// non-closeable: a dlclose will do nothing.
 				argv = append(argv, "-Wl,-z,nodelete")
@@ -1141,7 +1140,7 @@ func (ctxt *Link) hostlink() {
 		}
 		argv = append(argv, "-shared")
 	case BuildModePlugin:
-		if Headtype == objabi.Hdarwin {
+		if ctxt.HeadType == objabi.Hdarwin {
 			argv = append(argv, "-dynamiclib")
 		} else {
 			if ctxt.UseRelro() {
@@ -1299,7 +1298,7 @@ func (ctxt *Link) hostlink() {
 			}
 		}
 	}
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		// use gcc linker script to work around gcc bug
 		// (see https://golang.org/issue/20183 for details).
 		p := writeGDBLinkerScript()
@@ -1326,7 +1325,7 @@ func (ctxt *Link) hostlink() {
 		ctxt.Logf("%s", out)
 	}
 
-	if !*FlagS && !*FlagW && !debug_s && Headtype == objabi.Hdarwin {
+	if !*FlagS && !*FlagW && !debug_s && ctxt.HeadType == objabi.Hdarwin {
 		// Skip combining dwarf on arm.
 		if !ctxt.Arch.InFamily(sys.ARM, sys.ARM64) {
 			dsym := filepath.Join(*flagTmpdir, "go.dwarf")
@@ -1395,7 +1394,7 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
 			ehdr.flags = flags
 			ctxt.Textp = append(ctxt.Textp, textp...)
 		}
-		return ldhostobj(ldelf, f, pkg, length, pn, file)
+		return ldhostobj(ldelf, ctxt.HeadType, f, pkg, length, pn, file)
 	}
 
 	if magic&^1 == 0xfeedface || magic&^0x01000000 == 0xcefaedfe {
@@ -1407,7 +1406,7 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
 			}
 			ctxt.Textp = append(ctxt.Textp, textp...)
 		}
-		return ldhostobj(ldmacho, f, pkg, length, pn, file)
+		return ldhostobj(ldmacho, ctxt.HeadType, f, pkg, length, pn, file)
 	}
 
 	if c1 == 0x4c && c2 == 0x01 || c1 == 0x64 && c2 == 0x86 {
@@ -1422,7 +1421,7 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
 			}
 			ctxt.Textp = append(ctxt.Textp, textp...)
 		}
-		return ldhostobj(ldpe, f, pkg, length, pn, file)
+		return ldhostobj(ldpe, ctxt.HeadType, f, pkg, length, pn, file)
 	}
 
 	/* check the header */
@@ -1959,9 +1958,9 @@ func genasmsym(ctxt *Link, put func(*Link, *sym.Symbol, string, SymbolType, int6
 	s := ctxt.Syms.Lookup("runtime.text", 0)
 	if s.Type == sym.STEXT {
 		// We've already included this symbol in ctxt.Textp
-		// if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin.
+		// if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin.
 		// See data.go:/textaddress
-		if !(ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin) {
+		if !(ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin) {
 			put(ctxt, s, s.Name, TextSym, s.Value, nil)
 		}
 	}
@@ -1990,9 +1989,9 @@ func genasmsym(ctxt *Link, put func(*Link, *sym.Symbol, string, SymbolType, int6
 	s = ctxt.Syms.Lookup("runtime.etext", 0)
 	if s.Type == sym.STEXT {
 		// We've already included this symbol in ctxt.Textp
-		// if ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin.
+		// if ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin.
 		// See data.go:/textaddress
-		if !(ctxt.DynlinkingGo() && Headtype == objabi.Hdarwin) {
+		if !(ctxt.DynlinkingGo() && ctxt.HeadType == objabi.Hdarwin) {
 			put(ctxt, s, s.Name, TextSym, s.Value, nil)
 		}
 	}
@@ -2043,7 +2042,7 @@ func genasmsym(ctxt *Link, put func(*Link, *sym.Symbol, string, SymbolType, int6
 			put(ctxt, s, s.Name, BSSSym, Symaddr(s), s.Gotype)
 
 		case sym.SHOSTOBJ:
-			if Headtype == objabi.Hwindows || ctxt.IsELF {
+			if ctxt.HeadType == objabi.Hwindows || ctxt.IsELF {
 				put(ctxt, s, s.Name, UndefinedSym, s.Value, nil)
 			}
 

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

@@ -60,7 +60,8 @@ type Link struct {
 
 	Loaded bool // set after all inputs have been loaded as symbols
 
-	IsELF bool
+	IsELF    bool
+	HeadType objabi.HeadType
 
 	linkShared bool // link against installed Go shared libraries
 	LinkMode   LinkMode

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

@@ -85,7 +85,6 @@ var (
 	flagInterpreter = flag.String("I", "", "use `linker` as ELF dynamic linker")
 	FlagDebugTramp  = flag.Int("debugtramp", 0, "debug trampolines")
 
-	flagHeadtype    = flag.String("H", "", "set header `type`")
 	FlagRound       = flag.Int("R", -1, "set address rounding `quantum`")
 	FlagTextAddr    = flag.Int64("T", -1, "set text segment `address`")
 	FlagDataAddr    = flag.Int64("D", -1, "set data segment `address`")
@@ -115,6 +114,7 @@ func Main(arch *sys.Arch, theArch Arch) {
 	if ctxt.Arch.Family == sys.AMD64 && objabi.GOOS == "plan9" {
 		flag.BoolVar(&Flag8, "8", false, "use 64-bit addresses in symbol table")
 	}
+	flagHeadType := flag.String("H", "", "set header `type`")
 	flag.BoolVar(&ctxt.linkShared, "linkshared", false, "link against installed Go shared libraries")
 	flag.Var(&ctxt.LinkMode, "linkmode", "set link `mode`")
 	flag.Var(&ctxt.BuildMode, "buildmode", "set build `mode`")
@@ -127,13 +127,13 @@ func Main(arch *sys.Arch, theArch Arch) {
 
 	objabi.Flagparse(usage)
 
-	switch *flagHeadtype {
+	switch *flagHeadType {
 	case "":
 	case "windowsgui":
-		Headtype = objabi.Hwindows
+		ctxt.HeadType = objabi.Hwindows
 		windowsgui = true
 	default:
-		if err := Headtype.Set(*flagHeadtype); err != nil {
+		if err := ctxt.HeadType.Set(*flagHeadType); err != nil {
 			Errorf(nil, "%v", err)
 			usage()
 		}
@@ -150,7 +150,7 @@ func Main(arch *sys.Arch, theArch Arch) {
 
 	if *flagOutfile == "" {
 		*flagOutfile = "a.out"
-		if Headtype == objabi.Hwindows {
+		if ctxt.HeadType == objabi.Hwindows {
 			*flagOutfile += ".exe"
 		}
 	}
@@ -159,8 +159,8 @@ func Main(arch *sys.Arch, theArch Arch) {
 
 	libinit(ctxt) // creates outfile
 
-	if Headtype == objabi.Hunknown {
-		Headtype.Set(objabi.GOOS)
+	if ctxt.HeadType == objabi.Hunknown {
+		ctxt.HeadType.Set(objabi.GOOS)
 	}
 
 	ctxt.computeTLSOffset()
@@ -171,7 +171,7 @@ func Main(arch *sys.Arch, theArch Arch) {
 	}
 
 	if ctxt.Debugvlog != 0 {
-		ctxt.Logf("HEADER = -H%d -T0x%x -D0x%x -R0x%x\n", Headtype, uint64(*FlagTextAddr), uint64(*FlagDataAddr), uint32(*FlagRound))
+		ctxt.Logf("HEADER = -H%d -T0x%x -D0x%x -R0x%x\n", ctxt.HeadType, uint64(*FlagTextAddr), uint64(*FlagDataAddr), uint32(*FlagRound))
 	}
 
 	switch ctxt.BuildMode {
@@ -202,11 +202,11 @@ func Main(arch *sys.Arch, theArch Arch) {
 	ctxt.callgraph()
 
 	ctxt.doelf()
-	if Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		ctxt.domacho()
 	}
 	ctxt.dostkcheck()
-	if Headtype == objabi.Hwindows {
+	if ctxt.HeadType == objabi.Hwindows {
 		ctxt.dope()
 	}
 	ctxt.addexport()

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

@@ -176,7 +176,7 @@ func emitPcln(ctxt *Link, s *sym.Symbol) bool {
 	if s == nil {
 		return true
 	}
-	if ctxt.BuildMode == BuildModePlugin && Headtype == objabi.Hdarwin && onlycsymbol(s) {
+	if ctxt.BuildMode == BuildModePlugin && ctxt.HeadType == objabi.Hdarwin && onlycsymbol(s) {
 		return false
 	}
 	// We want to generate func table entries only for the "lowest level" symbols,

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

@@ -62,9 +62,9 @@ func linknew(arch *sys.Arch) *Link {
 
 // computeTLSOffset records the thread-local storage offset.
 func (ctxt *Link) computeTLSOffset() {
-	switch Headtype {
+	switch ctxt.HeadType {
 	default:
-		log.Fatalf("unknown thread-local storage offset for %v", Headtype)
+		log.Fatalf("unknown thread-local storage offset for %v", ctxt.HeadType)
 
 	case objabi.Hplan9, objabi.Hwindows:
 		break

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

@@ -231,7 +231,7 @@ func putplan9sym(ctxt *Link, x *sym.Symbol, s string, typ SymbolType, addr int64
 
 	case AutoSym, ParamSym, FrameSym:
 		l := 4
-		if Headtype == objabi.Hplan9 && ctxt.Arch.Family == sys.AMD64 && !Flag8 {
+		if ctxt.HeadType == objabi.Hplan9 && ctxt.Arch.Family == sys.AMD64 && !Flag8 {
 			ctxt.Out.Write32b(uint32(addr >> 32))
 			l = 8
 		}

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

@@ -240,7 +240,7 @@ func asmb(ctxt *ld.Link) {
 	}
 
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 		ld.Errorf(nil, "unsupported operating system")
 	case objabi.Hlinux:

src/cmd/link/internal/mips/obj.go

@@ -73,9 +73,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 	case objabi.Hlinux: /* mips elf */
 		ld.Elfinit(ctxt)
 		ld.HEADR = ld.ELFRESERVE

src/cmd/link/internal/mips64/asm.go

@@ -226,7 +226,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
@@ -238,7 +238,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(int64(symo))
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				if ctxt.Debugvlog != 0 {
@@ -270,7 +270,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f header\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan 9 */
 		magic := uint32(4*18*18 + 7)

src/cmd/link/internal/mips64/obj.go

@@ -71,9 +71,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32

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

@@ -958,7 +958,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
@@ -970,7 +970,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(int64(symo))
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				if ctxt.Debugvlog != 0 {
@@ -1002,7 +1002,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f header\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan 9 */
 		ctxt.Out.Write32(0x647)                      /* magic */

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

@@ -75,9 +75,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32

src/cmd/link/internal/s390x/asm.go

@@ -579,7 +579,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f header\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 		ld.Errorf(nil, "unsupported operating system")
 	case objabi.Hlinux:

src/cmd/link/internal/s390x/obj.go

@@ -71,9 +71,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hlinux: // s390x ELF
 		ld.Elfinit(ctxt)

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

@@ -316,7 +316,7 @@ func adddynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
 			return true
 		}
 
-		if ld.Headtype == objabi.Hdarwin && s.Size == int64(ctxt.Arch.PtrSize) && r.Off == 0 {
+		if ctxt.HeadType == objabi.Hdarwin && s.Size == int64(ctxt.Arch.PtrSize) && r.Off == 0 {
 			// Mach-O relocations are a royal pain to lay out.
 			// They use a compact stateful bytecode representation
 			// that is too much bother to deal with.
@@ -574,7 +574,7 @@ func addpltsym(ctxt *ld.Link, s *sym.Symbol) {
 		rel.AddUint32(ctxt.Arch, ld.ELF32_R_INFO(uint32(s.Dynid), uint32(elf.R_386_JMP_SLOT)))
 
 		s.Plt = int32(plt.Size - 16)
-	} else if ld.Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		// Same laziness as in 6l.
 
 		plt := ctxt.Syms.Lookup(".plt", 0)
@@ -608,7 +608,7 @@ func addgotsym(ctxt *ld.Link, s *sym.Symbol) {
 		rel := ctxt.Syms.Lookup(".rel", 0)
 		rel.AddAddrPlus(ctxt.Arch, got, int64(s.Got))
 		rel.AddUint32(ctxt.Arch, ld.ELF32_R_INFO(uint32(s.Dynid), uint32(elf.R_386_GLOB_DAT)))
-	} else if ld.Headtype == objabi.Hdarwin {
+	} else if ctxt.HeadType == objabi.Hdarwin {
 		ctxt.Syms.Lookup(".linkedit.got", 0).AddUint32(ctxt.Arch, uint32(s.Dynid))
 	} else {
 		ld.Errorf(s, "addgotsym: unsupported binary format")
@@ -660,7 +660,7 @@ func asmb(ctxt *ld.Link) {
 	ld.Dwarfblk(ctxt, int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
 
 	machlink := uint32(0)
-	if ld.Headtype == objabi.Hdarwin {
+	if ctxt.HeadType == objabi.Hdarwin {
 		machlink = uint32(ld.Domacholink(ctxt))
 	}
 
@@ -673,7 +673,7 @@ func asmb(ctxt *ld.Link) {
 		if ctxt.Debugvlog != 0 {
 			ctxt.Logf("%5.2f sym\n", ld.Cputime())
 		}
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
@@ -692,7 +692,7 @@ func asmb(ctxt *ld.Link) {
 		}
 
 		ctxt.Out.SeekSet(int64(symo))
-		switch ld.Headtype {
+		switch ctxt.HeadType {
 		default:
 			if ctxt.IsELF {
 				if ctxt.Debugvlog != 0 {
@@ -734,7 +734,7 @@ func asmb(ctxt *ld.Link) {
 		ctxt.Logf("%5.2f headr\n", ld.Cputime())
 	}
 	ctxt.Out.SeekSet(0)
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
 	case objabi.Hplan9: /* plan9 */
 		magic := int32(4*11*11 + 7)

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

@@ -69,9 +69,9 @@ func Init() (*sys.Arch, ld.Arch) {
 }
 
 func archinit(ctxt *ld.Link) {
-	switch ld.Headtype {
+	switch ctxt.HeadType {
 	default:
-		ld.Exitf("unknown -H option: %v", ld.Headtype)
+		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
 
 	case objabi.Hplan9: /* plan 9 */
 		ld.HEADR = 32