github.com/akaros/go-akaros@v0.0.0-20181004170632-85005d477eab/src/cmd/8l/obj.c (about) 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@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 // Reading object files. 32 33 #include "l.h" 34 #include "../ld/lib.h" 35 #include "../ld/elf.h" 36 #include "../ld/macho.h" 37 #include "../ld/dwarf.h" 38 #include "../ld/pe.h" 39 #include <ar.h> 40 41 char* thestring = "386"; 42 LinkArch* thelinkarch = &link386; 43 44 void 45 linkarchinit(void) 46 { 47 } 48 49 void 50 archinit(void) 51 { 52 // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when 53 // Go was built; see ../../make.bash. 54 if(linkmode == LinkAuto && strcmp(getgoextlinkenabled(), "0") == 0) 55 linkmode = LinkInternal; 56 57 switch(HEADTYPE) { 58 default: 59 if(linkmode == LinkAuto) 60 linkmode = LinkInternal; 61 if(linkmode == LinkExternal && strcmp(getgoextlinkenabled(), "1") != 0) 62 sysfatal("cannot use -linkmode=external with -H %s", headstr(HEADTYPE)); 63 break; 64 case Hdarwin: 65 case Hdragonfly: 66 case Hfreebsd: 67 case Hlinux: 68 case Hakaros: 69 case Hnetbsd: 70 case Hopenbsd: 71 break; 72 } 73 74 switch(HEADTYPE) { 75 default: 76 diag("unknown -H option"); 77 errorexit(); 78 79 case Hplan9: /* plan 9 */ 80 HEADR = 32L; 81 if(INITTEXT == -1) 82 INITTEXT = 4096+32; 83 if(INITDAT == -1) 84 INITDAT = 0; 85 if(INITRND == -1) 86 INITRND = 4096; 87 break; 88 case Hdarwin: /* apple MACH */ 89 machoinit(); 90 HEADR = INITIAL_MACHO_HEADR; 91 if(INITTEXT == -1) 92 INITTEXT = 4096+HEADR; 93 if(INITDAT == -1) 94 INITDAT = 0; 95 if(INITRND == -1) 96 INITRND = 4096; 97 break; 98 case Hlinux: /* elf32 executable */ 99 case Hakaros: 100 case Hfreebsd: 101 case Hnetbsd: 102 case Hopenbsd: 103 case Hdragonfly: 104 elfinit(); 105 HEADR = ELFRESERVE; 106 if(INITTEXT == -1) 107 INITTEXT = 0x08048000+HEADR; 108 if(INITDAT == -1) 109 INITDAT = 0; 110 if(INITRND == -1) 111 INITRND = 4096; 112 break; 113 114 case Hnacl: 115 elfinit(); 116 HEADR = 0x10000; 117 funcalign = 32; 118 if(INITTEXT == -1) 119 INITTEXT = 0x20000; 120 if(INITDAT == -1) 121 INITDAT = 0; 122 if(INITRND == -1) 123 INITRND = 0x10000; 124 break; 125 126 case Hwindows: /* PE executable */ 127 peinit(); 128 HEADR = PEFILEHEADR; 129 if(INITTEXT == -1) 130 INITTEXT = PEBASE+PESECTHEADR; 131 if(INITDAT == -1) 132 INITDAT = 0; 133 if(INITRND == -1) 134 INITRND = PESECTALIGN; 135 break; 136 } 137 if(INITDAT != 0 && INITRND != 0) 138 print("warning: -D0x%llux is ignored because of -R0x%ux\n", 139 INITDAT, INITRND); 140 }