obj.go

Documentation: cmd/link/internal/mips64

     1  // Inferno utils/5l/obj.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/5l/obj.c
     3  //
     4  //	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
     5  //	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
     6  //	Portions Copyright © 1997-1999 Vita Nuova Limited
     7  //	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
     8  //	Portions Copyright © 2004,2006 Bruce Ellis
     9  //	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
    10  //	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
    11  //	Portions Copyright © 2009 The Go Authors. All rights reserved.
    12  //
    13  // Permission is hereby granted, free of charge, to any person obtaining a copy
    14  // of this software and associated documentation files (the "Software"), to deal
    15  // in the Software without restriction, including without limitation the rights
    16  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    17  // copies of the Software, and to permit persons to whom the Software is
    18  // furnished to do so, subject to the following conditions:
    19  //
    20  // The above copyright notice and this permission notice shall be included in
    21  // all copies or substantial portions of the Software.
    22  //
    23  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    24  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    25  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    26  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    27  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    28  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    29  // THE SOFTWARE.
    30  
    31  package mips64
    32  
    33  import (
    34  	"cmd/internal/objabi"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"internal/buildcfg"
    38  )
    39  
    40  func Init() (*sys.Arch, ld.Arch) {
    41  	arch := sys.ArchMIPS64
    42  	musl := "/lib/ld-musl-mips64.so.1"
    43  	if buildcfg.GOARCH == "mips64le" {
    44  		arch = sys.ArchMIPS64LE
    45  		musl = "/lib/ld-musl-mips64el.so.1"
    46  	}
    47  
    48  	theArch := ld.Arch{
    49  		Funcalign:        funcAlign,
    50  		Maxalign:         maxAlign,
    51  		Minalign:         minAlign,
    52  		Dwarfregsp:       dwarfRegSP,
    53  		Dwarfreglr:       dwarfRegLR,
    54  		Adddynrel:        adddynrel,
    55  		Archinit:         archinit,
    56  		Archreloc:        archreloc,
    57  		Archrelocvariant: archrelocvariant,
    58  		Extreloc:         extreloc,
    59  		Gentext:          gentext,
    60  		Machoreloc1:      machoreloc1,
    61  
    62  		ELF: ld.ELFArch{
    63  			Linuxdynld:     "/lib64/ld64.so.1",
    64  			LinuxdynldMusl: musl,
    65  			Freebsddynld:   "XXX",
    66  			Openbsddynld:   "/usr/libexec/ld.so",
    67  			Netbsddynld:    "XXX",
    68  			Dragonflydynld: "XXX",
    69  			Solarisdynld:   "XXX",
    70  
    71  			Reloc1:    elfreloc1,
    72  			RelocSize: 24,
    73  			SetupPLT:  elfsetupplt,
    74  
    75  			// Historically GNU ld creates a read-only
    76  			// .dynamic section.
    77  			DynamicReadOnly: true,
    78  		},
    79  	}
    80  
    81  	return arch, theArch
    82  }
    83  
    84  func archinit(ctxt *ld.Link) {
    85  	switch ctxt.HeadType {
    86  	default:
    87  		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
    88  
    89  	case objabi.Hplan9: /* plan 9 */
    90  		ld.HEADR = 32
    91  		if *ld.FlagRound == -1 {
    92  			*ld.FlagRound = 16 * 1024
    93  		}
    94  		if *ld.FlagTextAddr == -1 {
    95  			*ld.FlagTextAddr = ld.Rnd(16*1024, *ld.FlagRound) + int64(ld.HEADR)
    96  		}
    97  
    98  	case objabi.Hlinux, /* mips64 elf */
    99  		objabi.Hopenbsd:
   100  		ld.Elfinit(ctxt)
   101  		ld.HEADR = ld.ELFRESERVE
   102  		if *ld.FlagRound == -1 {
   103  			*ld.FlagRound = 0x10000
   104  		}
   105  		if *ld.FlagTextAddr == -1 {
   106  			*ld.FlagTextAddr = ld.Rnd(0x10000, *ld.FlagRound) + int64(ld.HEADR)
   107  		}
   108  	}
   109  
   110  	dynSymCount = 0
   111  	gotLocalCount = 0
   112  	gotSymIndex = 0
   113  }
   114
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