github.com/miolini/go@v0.0.0-20160405192216-fca68c8cb408/src/cmd/link/internal/s390x/obj.go (about)

     1  // Inferno utils/5l/obj.c
     2  // http://code.google.com/p/inferno-os/source/browse/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 s390x
    32  
    33  import (
    34  	"cmd/internal/obj"
    35  	"cmd/link/internal/ld"
    36  	"fmt"
    37  )
    38  
    39  // Reading object files.
    40  
    41  func Main() {
    42  	linkarchinit()
    43  	ld.Ldmain()
    44  }
    45  
    46  func linkarchinit() {
    47  	ld.Thestring = obj.Getgoarch()
    48  	ld.Thelinkarch = &ld.Links390x
    49  
    50  	ld.Thearch.Thechar = thechar
    51  	ld.Thearch.Ptrsize = ld.Thelinkarch.Ptrsize
    52  	ld.Thearch.Intsize = ld.Thelinkarch.Ptrsize
    53  	ld.Thearch.Regsize = ld.Thelinkarch.Regsize
    54  	ld.Thearch.Funcalign = FuncAlign
    55  	ld.Thearch.Maxalign = MaxAlign
    56  	ld.Thearch.Minalign = MinAlign
    57  	ld.Thearch.Minlc = MINLC
    58  	ld.Thearch.Dwarfregsp = DWARFREGSP
    59  	ld.Thearch.Dwarfreglr = DWARFREGLR
    60  
    61  	ld.Thearch.Adddynrel = adddynrel
    62  	ld.Thearch.Archinit = archinit
    63  	ld.Thearch.Archreloc = archreloc
    64  	ld.Thearch.Archrelocvariant = archrelocvariant
    65  	ld.Thearch.Asmb = asmb // in asm.go
    66  	ld.Thearch.Elfreloc1 = elfreloc1
    67  	ld.Thearch.Elfsetupplt = elfsetupplt
    68  	ld.Thearch.Gentext = gentext
    69  	ld.Thearch.Machoreloc1 = machoreloc1
    70  	ld.Thearch.Lput = ld.Lputb
    71  	ld.Thearch.Wput = ld.Wputb
    72  	ld.Thearch.Vput = ld.Vputb
    73  	ld.Thearch.Append16 = ld.Append16b
    74  	ld.Thearch.Append32 = ld.Append32b
    75  	ld.Thearch.Append64 = ld.Append64b
    76  
    77  	ld.Thearch.Linuxdynld = "/lib64/ld64.so.1"
    78  
    79  	// not relevant for s390x
    80  	ld.Thearch.Freebsddynld = "XXX"
    81  	ld.Thearch.Openbsddynld = "XXX"
    82  	ld.Thearch.Netbsddynld = "XXX"
    83  	ld.Thearch.Dragonflydynld = "XXX"
    84  	ld.Thearch.Solarisdynld = "XXX"
    85  }
    86  
    87  func archinit() {
    88  	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
    89  	// Go was built; see ../../make.bash.
    90  	if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
    91  		ld.Linkmode = ld.LinkInternal
    92  	}
    93  
    94  	if ld.Buildmode == ld.BuildmodeCArchive || ld.Buildmode == ld.BuildmodeCShared || ld.DynlinkingGo() {
    95  		ld.Linkmode = ld.LinkExternal
    96  	}
    97  
    98  	switch ld.HEADTYPE {
    99  	default:
   100  		ld.Exitf("unknown -H option: %v", ld.HEADTYPE)
   101  
   102  	case obj.Hlinux: // s390x ELF
   103  		ld.Elfinit()
   104  		ld.HEADR = ld.ELFRESERVE
   105  		if ld.INITTEXT == -1 {
   106  			ld.INITTEXT = 0x10000 + int64(ld.HEADR)
   107  		}
   108  		if ld.INITDAT == -1 {
   109  			ld.INITDAT = 0
   110  		}
   111  		if ld.INITRND == -1 {
   112  			ld.INITRND = 0x10000
   113  		}
   114  	}
   115  
   116  	if ld.INITDAT != 0 && ld.INITRND != 0 {
   117  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))
   118  	}
   119  }