github.com/4ad/go@v0.0.0-20161219182952-69a12818b605/src/cmd/link/internal/mips64/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 mips64
    32  
    33  import (
    34  	"cmd/internal/obj"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"fmt"
    38  	"log"
    39  )
    40  
    41  // Reading object files.
    42  
    43  func Main() {
    44  	linkarchinit()
    45  	ld.Ldmain()
    46  }
    47  
    48  func linkarchinit() {
    49  	if obj.Getgoarch() == "mips64le" {
    50  		ld.SysArch = sys.ArchMIPS64LE
    51  	} else {
    52  		ld.SysArch = sys.ArchMIPS64
    53  	}
    54  
    55  	ld.Thearch.Funcalign = FuncAlign
    56  	ld.Thearch.Maxalign = MaxAlign
    57  	ld.Thearch.Minalign = MinAlign
    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
    66  	ld.Thearch.Elfreloc1 = elfreloc1
    67  	ld.Thearch.Elfsetupplt = elfsetupplt
    68  	ld.Thearch.Gentext = gentext
    69  	ld.Thearch.Machoreloc1 = machoreloc1
    70  	if ld.SysArch == sys.ArchMIPS64LE {
    71  		ld.Thearch.Lput = ld.Lputl
    72  		ld.Thearch.Wput = ld.Wputl
    73  		ld.Thearch.Vput = ld.Vputl
    74  		ld.Thearch.Append16 = ld.Append16l
    75  		ld.Thearch.Append32 = ld.Append32l
    76  		ld.Thearch.Append64 = ld.Append64l
    77  	} else {
    78  		ld.Thearch.Lput = ld.Lputb
    79  		ld.Thearch.Wput = ld.Wputb
    80  		ld.Thearch.Vput = ld.Vputb
    81  		ld.Thearch.Append16 = ld.Append16b
    82  		ld.Thearch.Append32 = ld.Append32b
    83  		ld.Thearch.Append64 = ld.Append64b
    84  	}
    85  
    86  	ld.Thearch.Linuxdynld = "/lib64/ld64.so.1"
    87  
    88  	ld.Thearch.Freebsddynld = "XXX"
    89  	ld.Thearch.Openbsddynld = "XXX"
    90  	ld.Thearch.Netbsddynld = "XXX"
    91  	ld.Thearch.Dragonflydynld = "XXX"
    92  	ld.Thearch.Solarisdynld = "XXX"
    93  }
    94  
    95  func archinit() {
    96  	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
    97  	// Go was built; see ../../make.bash.
    98  	if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
    99  		ld.Linkmode = ld.LinkInternal
   100  	}
   101  
   102  	switch ld.HEADTYPE {
   103  	default:
   104  		if ld.Linkmode == ld.LinkAuto {
   105  			ld.Linkmode = ld.LinkInternal
   106  		}
   107  		if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" {
   108  			log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE)))
   109  		}
   110  
   111  	case obj.Hlinux:
   112  		break
   113  	}
   114  
   115  	switch ld.HEADTYPE {
   116  	default:
   117  		ld.Exitf("unknown -H option: %v", ld.HEADTYPE)
   118  
   119  	case obj.Hplan9: /* plan 9 */
   120  		ld.HEADR = 32
   121  
   122  		if ld.INITTEXT == -1 {
   123  			ld.INITTEXT = 16*1024 + int64(ld.HEADR)
   124  		}
   125  		if ld.INITDAT == -1 {
   126  			ld.INITDAT = 0
   127  		}
   128  		if ld.INITRND == -1 {
   129  			ld.INITRND = 16 * 1024
   130  		}
   131  
   132  	case obj.Hlinux: /* mips64 elf */
   133  		ld.Elfinit()
   134  		ld.HEADR = ld.ELFRESERVE
   135  		if ld.INITTEXT == -1 {
   136  			ld.INITTEXT = 0x10000 + int64(ld.HEADR)
   137  		}
   138  		if ld.INITDAT == -1 {
   139  			ld.INITDAT = 0
   140  		}
   141  		if ld.INITRND == -1 {
   142  			ld.INITRND = 0x10000
   143  		}
   144  
   145  	case obj.Hnacl:
   146  		ld.Elfinit()
   147  		ld.HEADR = 0x10000
   148  		ld.Funcalign = 16
   149  		if ld.INITTEXT == -1 {
   150  			ld.INITTEXT = 0x20000
   151  		}
   152  		if ld.INITDAT == -1 {
   153  			ld.INITDAT = 0
   154  		}
   155  		if ld.INITRND == -1 {
   156  			ld.INITRND = 0x10000
   157  		}
   158  	}
   159  
   160  	if ld.INITDAT != 0 && ld.INITRND != 0 {
   161  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))
   162  	}
   163  }