1 // Inferno utils/6l/obj.c 2 // http://code.google.com/p/inferno-os/source/browse/utils/6l/obj.c 3 // 4 // Copyright 1994-1999 Lucent Technologies Inc. All rights reserved. 5 // Portions Copyright 1995-1997 C H Forsyth (forsyth (a] 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 (a] 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/obj" 35 "cmd/link/internal/ld" 36 "fmt" 37 "log" 38 ) 39 40 // Reading object files. 41 42 func Main() { 43 linkarchinit() 44 ld.Ldmain() 45 } 46 47 func linkarchinit() { 48 ld.Thestring = "amd64" 49 ld.Thelinkarch = &ld.Linkamd64 50 if obj.Getgoarch() == "amd64p32" { 51 ld.Thelinkarch = &ld.Linkamd64p32 52 } 53 54 ld.Thearch.Thechar = thechar 55 ld.Thearch.Ptrsize = ld.Thelinkarch.Ptrsize 56 ld.Thearch.Intsize = ld.Thelinkarch.Ptrsize 57 ld.Thearch.Regsize = ld.Thelinkarch.Regsize 58 ld.Thearch.Funcalign = FuncAlign 59 ld.Thearch.Maxalign = MaxAlign 60 ld.Thearch.Minlc = MINLC 61 ld.Thearch.Dwarfregsp = DWARFREGSP 62 ld.Thearch.Dwarfreglr = DWARFREGLR 63 64 ld.Thearch.Adddynrel = adddynrel 65 ld.Thearch.Archinit = archinit 66 ld.Thearch.Archreloc = archreloc 67 ld.Thearch.Archrelocvariant = archrelocvariant 68 ld.Thearch.Asmb = asmb 69 ld.Thearch.Elfreloc1 = elfreloc1 70 ld.Thearch.Elfsetupplt = elfsetupplt 71 ld.Thearch.Gentext = gentext 72 ld.Thearch.Machoreloc1 = machoreloc1 73 ld.Thearch.PEreloc1 = pereloc1 74 ld.Thearch.Lput = ld.Lputl 75 ld.Thearch.Wput = ld.Wputl 76 ld.Thearch.Vput = ld.Vputl 77 78 ld.Thearch.Linuxdynld = "/lib64/ld-linux-x86-64.so.2" 79 ld.Thearch.Freebsddynld = "/libexec/ld-elf.so.1" 80 ld.Thearch.Openbsddynld = "/usr/libexec/ld.so" 81 ld.Thearch.Netbsddynld = "/libexec/ld.elf_so" 82 ld.Thearch.Dragonflydynld = "/usr/libexec/ld-elf.so.2" 83 ld.Thearch.Solarisdynld = "/lib/amd64/ld.so.1" 84 } 85 86 func archinit() { 87 // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when 88 // Go was built; see ../../make.bash. 89 if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" { 90 ld.Linkmode = ld.LinkInternal 91 } 92 93 if ld.Buildmode == ld.BuildmodeCArchive || ld.Buildmode == ld.BuildmodeCShared || ld.DynlinkingGo() { 94 ld.Linkmode = ld.LinkExternal 95 } 96 97 switch ld.HEADTYPE { 98 default: 99 if ld.Linkmode == ld.LinkAuto { 100 ld.Linkmode = ld.LinkInternal 101 } 102 if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" { 103 log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE))) 104 } 105 106 case obj.Hdarwin, 107 obj.Hdragonfly, 108 obj.Hfreebsd, 109 obj.Hlinux, 110 obj.Hnacl, 111 obj.Hnetbsd, 112 obj.Hopenbsd, 113 obj.Hsolaris, 114 obj.Hwindows: 115 break 116 } 117 118 switch ld.HEADTYPE { 119 default: 120 ld.Exitf("unknown -H option: %v", ld.HEADTYPE) 121 122 case obj.Hplan9: /* plan 9 */ 123 ld.HEADR = 32 + 8 124 125 if ld.INITTEXT == -1 { 126 ld.INITTEXT = 0x200000 + int64(ld.HEADR) 127 } 128 if ld.INITDAT == -1 { 129 ld.INITDAT = 0 130 } 131 if ld.INITRND == -1 { 132 ld.INITRND = 0x200000 133 } 134 135 case obj.Helf: /* elf32 executable */ 136 ld.HEADR = int32(ld.Rnd(52+3*32, 16)) 137 138 if ld.INITTEXT == -1 { 139 ld.INITTEXT = 0x80110000 140 } 141 if ld.INITDAT == -1 { 142 ld.INITDAT = 0 143 } 144 if ld.INITRND == -1 { 145 ld.INITRND = 4096 146 } 147 148 case obj.Hdarwin: /* apple MACH */ 149 ld.Machoinit() 150 151 ld.HEADR = ld.INITIAL_MACHO_HEADR 152 if ld.INITRND == -1 { 153 ld.INITRND = 4096 154 } 155 if ld.INITTEXT == -1 { 156 ld.INITTEXT = 4096 + int64(ld.HEADR) 157 } 158 if ld.INITDAT == -1 { 159 ld.INITDAT = 0 160 } 161 162 case obj.Hlinux, /* elf64 executable */ 163 obj.Hfreebsd, /* freebsd */ 164 obj.Hnetbsd, /* netbsd */ 165 obj.Hopenbsd, /* openbsd */ 166 obj.Hdragonfly, /* dragonfly */ 167 obj.Hsolaris: /* solaris */ 168 ld.Elfinit() 169 170 ld.HEADR = ld.ELFRESERVE 171 if ld.INITTEXT == -1 { 172 ld.INITTEXT = (1 << 22) + int64(ld.HEADR) 173 } 174 if ld.INITDAT == -1 { 175 ld.INITDAT = 0 176 } 177 if ld.INITRND == -1 { 178 ld.INITRND = 4096 179 } 180 181 case obj.Hnacl: 182 ld.Elfinit() 183 ld.Debug['w']++ // disable dwarf, which gets confused and is useless anyway 184 ld.HEADR = 0x10000 185 ld.Funcalign = 32 186 if ld.INITTEXT == -1 { 187 ld.INITTEXT = 0x20000 188 } 189 if ld.INITDAT == -1 { 190 ld.INITDAT = 0 191 } 192 if ld.INITRND == -1 { 193 ld.INITRND = 0x10000 194 } 195 196 case obj.Hwindows: /* PE executable */ 197 ld.Peinit() 198 199 ld.HEADR = ld.PEFILEHEADR 200 if ld.INITTEXT == -1 { 201 ld.INITTEXT = ld.PEBASE + int64(ld.PESECTHEADR) 202 } 203 if ld.INITDAT == -1 { 204 ld.INITDAT = 0 205 } 206 if ld.INITRND == -1 { 207 ld.INITRND = ld.PESECTALIGN 208 } 209 } 210 211 if ld.INITDAT != 0 && ld.INITRND != 0 { 212 fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND)) 213 } 214 } 215
