1 // Inferno utils/8l/obj.c 2 // http://code.google.com/p/inferno-os/source/browse/utils/8l/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 x86 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 = "386" 49 ld.Thelinkarch = &ld.Link386 50 51 ld.Thearch.Thechar = thechar 52 ld.Thearch.Ptrsize = ld.Thelinkarch.Ptrsize 53 ld.Thearch.Intsize = ld.Thelinkarch.Ptrsize 54 ld.Thearch.Regsize = ld.Thelinkarch.Regsize 55 ld.Thearch.Funcalign = FuncAlign 56 ld.Thearch.Maxalign = MaxAlign 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 66 ld.Thearch.Elfreloc1 = elfreloc1 67 ld.Thearch.Elfsetupplt = elfsetupplt 68 ld.Thearch.Gentext = gentext 69 ld.Thearch.Machoreloc1 = machoreloc1 70 ld.Thearch.PEreloc1 = pereloc1 71 ld.Thearch.Lput = ld.Lputl 72 ld.Thearch.Wput = ld.Wputl 73 ld.Thearch.Vput = ld.Vputl 74 75 ld.Thearch.Linuxdynld = "/lib/ld-linux.so.2" 76 ld.Thearch.Freebsddynld = "/usr/libexec/ld-elf.so.1" 77 ld.Thearch.Openbsddynld = "/usr/libexec/ld.so" 78 ld.Thearch.Netbsddynld = "/usr/libexec/ld.elf_so" 79 ld.Thearch.Solarisdynld = "/lib/ld.so.1" 80 } 81 82 func archinit() { 83 // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when 84 // Go was built; see ../../make.bash. 85 if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" { 86 ld.Linkmode = ld.LinkInternal 87 } 88 89 switch ld.HEADTYPE { 90 default: 91 if ld.Linkmode == ld.LinkAuto { 92 ld.Linkmode = ld.LinkInternal 93 } 94 if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" { 95 log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE))) 96 } 97 98 case obj.Hdarwin, 99 obj.Hfreebsd, 100 obj.Hlinux, 101 obj.Hnetbsd, 102 obj.Hopenbsd, 103 obj.Hwindows: 104 break 105 } 106 107 switch ld.HEADTYPE { 108 default: 109 ld.Exitf("unknown -H option: %v", ld.HEADTYPE) 110 111 case obj.Hplan9: /* plan 9 */ 112 ld.HEADR = 32 113 114 if ld.INITTEXT == -1 { 115 ld.INITTEXT = 4096 + 32 116 } 117 if ld.INITDAT == -1 { 118 ld.INITDAT = 0 119 } 120 if ld.INITRND == -1 { 121 ld.INITRND = 4096 122 } 123 124 case obj.Hdarwin: /* apple MACH */ 125 ld.Machoinit() 126 127 ld.HEADR = ld.INITIAL_MACHO_HEADR 128 if ld.INITTEXT == -1 { 129 ld.INITTEXT = 4096 + int64(ld.HEADR) 130 } 131 if ld.INITDAT == -1 { 132 ld.INITDAT = 0 133 } 134 if ld.INITRND == -1 { 135 ld.INITRND = 4096 136 } 137 138 case obj.Hlinux, /* elf32 executable */ 139 obj.Hfreebsd, 140 obj.Hnetbsd, 141 obj.Hopenbsd: 142 ld.Elfinit() 143 144 ld.HEADR = ld.ELFRESERVE 145 if ld.INITTEXT == -1 { 146 ld.INITTEXT = 0x08048000 + int64(ld.HEADR) 147 } 148 if ld.INITDAT == -1 { 149 ld.INITDAT = 0 150 } 151 if ld.INITRND == -1 { 152 ld.INITRND = 4096 153 } 154 155 case obj.Hnacl: 156 ld.Elfinit() 157 ld.HEADR = 0x10000 158 ld.Funcalign = 32 159 if ld.INITTEXT == -1 { 160 ld.INITTEXT = 0x20000 161 } 162 if ld.INITDAT == -1 { 163 ld.INITDAT = 0 164 } 165 if ld.INITRND == -1 { 166 ld.INITRND = 0x10000 167 } 168 169 case obj.Hwindows: /* PE executable */ 170 ld.Peinit() 171 172 ld.HEADR = ld.PEFILEHEADR 173 if ld.INITTEXT == -1 { 174 ld.INITTEXT = ld.PEBASE + int64(ld.PESECTHEADR) 175 } 176 if ld.INITDAT == -1 { 177 ld.INITDAT = 0 178 } 179 if ld.INITRND == -1 { 180 ld.INITRND = ld.PESECTALIGN 181 } 182 } 183 184 if ld.INITDAT != 0 && ld.INITRND != 0 { 185 fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND)) 186 } 187 } 188
