github.com/sanprasirt/go@v0.0.0-20170607001320-a027466e4b6d/src/cmd/link/internal/amd64/obj.go (about)

     1  // Inferno utils/6l/obj.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/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 amd64
    32  
    33  import (
    34  	"cmd/internal/objabi"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"fmt"
    38  )
    39  
    40  func Init() {
    41  	ld.SysArch = sys.ArchAMD64
    42  	if objabi.GOARCH == "amd64p32" {
    43  		ld.SysArch = sys.ArchAMD64P32
    44  	}
    45  
    46  	ld.Thearch.Funcalign = funcAlign
    47  	ld.Thearch.Maxalign = maxAlign
    48  	ld.Thearch.Minalign = minAlign
    49  	ld.Thearch.Dwarfregsp = dwarfRegSP
    50  	ld.Thearch.Dwarfreglr = dwarfRegLR
    51  
    52  	ld.Thearch.Adddynrel = adddynrel
    53  	ld.Thearch.Archinit = archinit
    54  	ld.Thearch.Archreloc = archreloc
    55  	ld.Thearch.Archrelocvariant = archrelocvariant
    56  	ld.Thearch.Asmb = asmb
    57  	ld.Thearch.Elfreloc1 = elfreloc1
    58  	ld.Thearch.Elfsetupplt = elfsetupplt
    59  	ld.Thearch.Gentext = gentext
    60  	ld.Thearch.Machoreloc1 = machoreloc1
    61  	ld.Thearch.PEreloc1 = pereloc1
    62  	ld.Thearch.Lput = ld.Lputl
    63  	ld.Thearch.Wput = ld.Wputl
    64  	ld.Thearch.Vput = ld.Vputl
    65  	ld.Thearch.Append16 = ld.Append16l
    66  	ld.Thearch.Append32 = ld.Append32l
    67  	ld.Thearch.Append64 = ld.Append64l
    68  	ld.Thearch.TLSIEtoLE = tlsIEtoLE
    69  
    70  	ld.Thearch.Linuxdynld = "/lib64/ld-linux-x86-64.so.2"
    71  	ld.Thearch.Freebsddynld = "/libexec/ld-elf.so.1"
    72  	ld.Thearch.Openbsddynld = "/usr/libexec/ld.so"
    73  	ld.Thearch.Netbsddynld = "/libexec/ld.elf_so"
    74  	ld.Thearch.Dragonflydynld = "/usr/libexec/ld-elf.so.2"
    75  	ld.Thearch.Solarisdynld = "/lib/amd64/ld.so.1"
    76  }
    77  
    78  func archinit(ctxt *ld.Link) {
    79  	switch ld.Headtype {
    80  	default:
    81  		ld.Exitf("unknown -H option: %v", ld.Headtype)
    82  
    83  	case objabi.Hplan9: /* plan 9 */
    84  		ld.HEADR = 32 + 8
    85  
    86  		if *ld.FlagTextAddr == -1 {
    87  			*ld.FlagTextAddr = 0x200000 + int64(ld.HEADR)
    88  		}
    89  		if *ld.FlagDataAddr == -1 {
    90  			*ld.FlagDataAddr = 0
    91  		}
    92  		if *ld.FlagRound == -1 {
    93  			*ld.FlagRound = 0x200000
    94  		}
    95  
    96  	case objabi.Hdarwin: /* apple MACH */
    97  		ld.Machoinit()
    98  
    99  		ld.HEADR = ld.INITIAL_MACHO_HEADR
   100  		if *ld.FlagRound == -1 {
   101  			*ld.FlagRound = 4096
   102  		}
   103  		if *ld.FlagTextAddr == -1 {
   104  			*ld.FlagTextAddr = 0x1000000 + int64(ld.HEADR)
   105  		}
   106  		if *ld.FlagDataAddr == -1 {
   107  			*ld.FlagDataAddr = 0
   108  		}
   109  
   110  	case objabi.Hlinux, /* elf64 executable */
   111  		objabi.Hfreebsd,   /* freebsd */
   112  		objabi.Hnetbsd,    /* netbsd */
   113  		objabi.Hopenbsd,   /* openbsd */
   114  		objabi.Hdragonfly, /* dragonfly */
   115  		objabi.Hsolaris:   /* solaris */
   116  		ld.Elfinit(ctxt)
   117  
   118  		ld.HEADR = ld.ELFRESERVE
   119  		if *ld.FlagTextAddr == -1 {
   120  			*ld.FlagTextAddr = (1 << 22) + int64(ld.HEADR)
   121  		}
   122  		if *ld.FlagDataAddr == -1 {
   123  			*ld.FlagDataAddr = 0
   124  		}
   125  		if *ld.FlagRound == -1 {
   126  			*ld.FlagRound = 4096
   127  		}
   128  
   129  	case objabi.Hnacl:
   130  		ld.Elfinit(ctxt)
   131  		*ld.FlagW = true // disable dwarf, which gets confused and is useless anyway
   132  		ld.HEADR = 0x10000
   133  		ld.Funcalign = 32
   134  		if *ld.FlagTextAddr == -1 {
   135  			*ld.FlagTextAddr = 0x20000
   136  		}
   137  		if *ld.FlagDataAddr == -1 {
   138  			*ld.FlagDataAddr = 0
   139  		}
   140  		if *ld.FlagRound == -1 {
   141  			*ld.FlagRound = 0x10000
   142  		}
   143  
   144  	case objabi.Hwindows: /* PE executable */
   145  		// ld.HEADR, ld.FlagTextAddr, ld.FlagDataAddr and ld.FlagRound are set in ld.Peinit
   146  		return
   147  	}
   148  
   149  	if *ld.FlagDataAddr != 0 && *ld.FlagRound != 0 {
   150  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(*ld.FlagDataAddr), uint32(*ld.FlagRound))
   151  	}
   152  }