obj.go

     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 © 2016 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 mips
    32  
    33  import (
    34  	"cmd/internal/objabi"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"cmd/link/internal/loader"
    38  	"internal/buildcfg"
    39  )
    40  
    41  func Init() (*sys.Arch, ld.Arch) {
    42  	arch := sys.ArchMIPS
    43  	musl := "/lib/ld-musl-mips.so.1"
    44  	if buildcfg.GOARCH == "mipsle" {
    45  		arch = sys.ArchMIPSLE
    46  		musl = "/lib/ld-musl-mipsel.so.1"
    47  	}
    48  
    49  	theArch := ld.Arch{
    50  		Funcalign:  FuncAlign,
    51  		Maxalign:   MaxAlign,
    52  		Minalign:   MinAlign,
    53  		Dwarfregsp: DWARFREGSP,
    54  		Dwarfreglr: DWARFREGLR,
    55  
    56  		Adddynrel:        adddynrel,
    57  		Archinit:         archinit,
    58  		Archreloc:        archreloc,
    59  		Archrelocvariant: archrelocvariant,
    60  		Extreloc:         extreloc,
    61  		Gentext:          gentext,
    62  		Machoreloc1:      machoreloc1,
    63  
    64  		ELF: ld.ELFArch{
    65  			Linuxdynld:     "/lib/ld.so.1",
    66  			LinuxdynldMusl: musl,
    67  
    68  			Freebsddynld:   "XXX",
    69  			Openbsddynld:   "XXX",
    70  			Netbsddynld:    "XXX",
    71  			Dragonflydynld: "XXX",
    72  			Solarisdynld:   "XXX",
    73  
    74  			Reloc1:    elfreloc1,
    75  			RelocSize: 8,
    76  			SetupPLT:  elfsetupplt,
    77  
    78  			// Historically GNU ld creates a read-only
    79  			// .dynamic section.
    80  			DynamicReadOnly: true,
    81  		},
    82  	}
    83  
    84  	return arch, theArch
    85  }
    86  
    87  func archinit(ctxt *ld.Link) {
    88  	switch ctxt.HeadType {
    89  	default:
    90  		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
    91  	case objabi.Hlinux: /* mips elf */
    92  		ld.Elfinit(ctxt)
    93  		ld.HEADR = ld.ELFRESERVE
    94  		if *ld.FlagRound == -1 {
    95  			*ld.FlagRound = 0x10000
    96  		}
    97  		if *ld.FlagTextAddr == -1 {
    98  			*ld.FlagTextAddr = ld.Rnd(0x10000, *ld.FlagRound) + int64(ld.HEADR)
    99  		}
   100  	}
   101  }
   102  
   103  func adddynrel(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, s loader.Sym, r loader.Reloc, rIdx int) bool {
   104  	ld.Exitf("adddynrel currently unimplemented for MIPS")
   105  	return false
   106  }
   107
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