github.com/rakyll/go@v0.0.0-20170216000551-64c02460d703/src/cmd/link/internal/arm64/obj.go (about)

     1  // Inferno utils/5l/obj.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/default/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 arm64
    32  
    33  import (
    34  	"cmd/internal/obj"
    35  	"cmd/internal/sys"
    36  	"cmd/link/internal/ld"
    37  	"fmt"
    38  )
    39  
    40  func Init() {
    41  	ld.SysArch = sys.ArchARM64
    42  
    43  	ld.Thearch.Funcalign = funcAlign
    44  	ld.Thearch.Maxalign = maxAlign
    45  	ld.Thearch.Minalign = minAlign
    46  	ld.Thearch.Dwarfregsp = dwarfRegSP
    47  	ld.Thearch.Dwarfreglr = dwarfRegLR
    48  
    49  	ld.Thearch.Adddynrel = adddynrel
    50  	ld.Thearch.Archinit = archinit
    51  	ld.Thearch.Archreloc = archreloc
    52  	ld.Thearch.Archrelocvariant = archrelocvariant
    53  	ld.Thearch.Asmb = asmb
    54  	ld.Thearch.Elfreloc1 = elfreloc1
    55  	ld.Thearch.Elfsetupplt = elfsetupplt
    56  	ld.Thearch.Gentext = gentext
    57  	ld.Thearch.Machoreloc1 = machoreloc1
    58  	ld.Thearch.Lput = ld.Lputl
    59  	ld.Thearch.Wput = ld.Wputl
    60  	ld.Thearch.Vput = ld.Vputl
    61  	ld.Thearch.Append16 = ld.Append16l
    62  	ld.Thearch.Append32 = ld.Append32l
    63  	ld.Thearch.Append64 = ld.Append64l
    64  
    65  	ld.Thearch.Linuxdynld = "/lib/ld-linux-aarch64.so.1"
    66  
    67  	ld.Thearch.Freebsddynld = "XXX"
    68  	ld.Thearch.Openbsddynld = "XXX"
    69  	ld.Thearch.Netbsddynld = "XXX"
    70  	ld.Thearch.Dragonflydynld = "XXX"
    71  	ld.Thearch.Solarisdynld = "XXX"
    72  }
    73  
    74  func archinit(ctxt *ld.Link) {
    75  	switch ld.Headtype {
    76  	default:
    77  		ld.Exitf("unknown -H option: %v", ld.Headtype)
    78  
    79  	case obj.Hplan9: /* plan 9 */
    80  		ld.HEADR = 32
    81  
    82  		if *ld.FlagTextAddr == -1 {
    83  			*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
    84  		}
    85  		if *ld.FlagDataAddr == -1 {
    86  			*ld.FlagDataAddr = 0
    87  		}
    88  		if *ld.FlagRound == -1 {
    89  			*ld.FlagRound = 4096
    90  		}
    91  
    92  	case obj.Hlinux: /* arm64 elf */
    93  		ld.Elfinit(ctxt)
    94  		ld.HEADR = ld.ELFRESERVE
    95  		if *ld.FlagTextAddr == -1 {
    96  			*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
    97  		}
    98  		if *ld.FlagDataAddr == -1 {
    99  			*ld.FlagDataAddr = 0
   100  		}
   101  		if *ld.FlagRound == -1 {
   102  			*ld.FlagRound = 0x10000
   103  		}
   104  
   105  	case obj.Hdarwin: /* apple MACH */
   106  		*ld.FlagW = true // disable DWARF generation
   107  		ld.Machoinit()
   108  		ld.HEADR = ld.INITIAL_MACHO_HEADR
   109  		if *ld.FlagTextAddr == -1 {
   110  			*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
   111  		}
   112  		if *ld.FlagDataAddr == -1 {
   113  			*ld.FlagDataAddr = 0
   114  		}
   115  		if *ld.FlagRound == -1 {
   116  			*ld.FlagRound = 4096
   117  		}
   118  
   119  	case obj.Hnacl:
   120  		ld.Elfinit(ctxt)
   121  		ld.HEADR = 0x10000
   122  		ld.Funcalign = 16
   123  		if *ld.FlagTextAddr == -1 {
   124  			*ld.FlagTextAddr = 0x20000
   125  		}
   126  		if *ld.FlagDataAddr == -1 {
   127  			*ld.FlagDataAddr = 0
   128  		}
   129  		if *ld.FlagRound == -1 {
   130  			*ld.FlagRound = 0x10000
   131  		}
   132  	}
   133  
   134  	if *ld.FlagDataAddr != 0 && *ld.FlagRound != 0 {
   135  		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(*ld.FlagDataAddr), uint32(*ld.FlagRound))
   136  	}
   137  }