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

Documentation: cmd/link/internal/arm64

  // Inferno utils/5l/obj.c
  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5l/obj.c
  //
  //	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
  //	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
  //	Portions Copyright © 1997-1999 Vita Nuova Limited
  //	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
  //	Portions Copyright © 2004,2006 Bruce Ellis
  //	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
  //	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
  //	Portions Copyright © 2009 The Go Authors. All rights reserved.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  package arm64
  
  import (
  	"cmd/internal/objabi"
  	"cmd/internal/sys"
  	"cmd/link/internal/ld"
  	"fmt"
  )
  
  func Init() (*sys.Arch, ld.Arch) {
  	arch := sys.ArchARM64
  
  	theArch := ld.Arch{
  		Funcalign:  funcAlign,
  		Maxalign:   maxAlign,
  		Minalign:   minAlign,
  		Dwarfregsp: dwarfRegSP,
  		Dwarfreglr: dwarfRegLR,
  
  		Adddynrel:        adddynrel,
  		Archinit:         archinit,
  		Archreloc:        archreloc,
  		Archrelocvariant: archrelocvariant,
  		Asmb:             asmb,
  		Elfreloc1:        elfreloc1,
  		Elfsetupplt:      elfsetupplt,
  		Gentext:          gentext,
  		Machoreloc1:      machoreloc1,
  
  		Linuxdynld: "/lib/ld-linux-aarch64.so.1",
  
  		Freebsddynld:   "XXX",
  		Openbsddynld:   "XXX",
  		Netbsddynld:    "XXX",
  		Dragonflydynld: "XXX",
  		Solarisdynld:   "XXX",
  	}
  
  	return arch, theArch
  }
  
  func archinit(ctxt *ld.Link) {
  	switch ctxt.HeadType {
  	default:
  		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
  
  	case objabi.Hplan9: /* plan 9 */
  		ld.HEADR = 32
  
  		if *ld.FlagTextAddr == -1 {
  			*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
  		}
  		if *ld.FlagDataAddr == -1 {
  			*ld.FlagDataAddr = 0
  		}
  		if *ld.FlagRound == -1 {
  			*ld.FlagRound = 4096
  		}
  
  	case objabi.Hlinux: /* arm64 elf */
  		ld.Elfinit(ctxt)
  		ld.HEADR = ld.ELFRESERVE
  		if *ld.FlagTextAddr == -1 {
  			*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
  		}
  		if *ld.FlagDataAddr == -1 {
  			*ld.FlagDataAddr = 0
  		}
  		if *ld.FlagRound == -1 {
  			*ld.FlagRound = 0x10000
  		}
  
  	case objabi.Hdarwin: /* apple MACH */
  		*ld.FlagW = true // disable DWARF generation
  		ld.HEADR = ld.INITIAL_MACHO_HEADR
  		if *ld.FlagTextAddr == -1 {
  			*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
  		}
  		if *ld.FlagDataAddr == -1 {
  			*ld.FlagDataAddr = 0
  		}
  		if *ld.FlagRound == -1 {
  			*ld.FlagRound = 4096
  		}
  
  	case objabi.Hnacl:
  		ld.Elfinit(ctxt)
  		ld.HEADR = 0x10000
  		ld.Funcalign = 16
  		if *ld.FlagTextAddr == -1 {
  			*ld.FlagTextAddr = 0x20000
  		}
  		if *ld.FlagDataAddr == -1 {
  			*ld.FlagDataAddr = 0
  		}
  		if *ld.FlagRound == -1 {
  			*ld.FlagRound = 0x10000
  		}
  	}
  
  	if *ld.FlagDataAddr != 0 && *ld.FlagRound != 0 {
  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(*ld.FlagDataAddr), uint32(*ld.FlagRound))
  	}
  }
  

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