1 // Inferno utils/5l/obj.c 2 // https://bitbucket.org/inferno-os/inferno-os/src/master/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 arm 32 33 import ( 34 "cmd/internal/objabi" 35 "cmd/internal/sys" 36 "cmd/link/internal/ld" 37 ) 38 39 func Init() (*sys.Arch, ld.Arch) { 40 arch := sys.ArchARM 41 42 theArch := ld.Arch{ 43 Funcalign: funcAlign, 44 Maxalign: maxAlign, 45 Minalign: minAlign, 46 Dwarfregsp: dwarfRegSP, 47 Dwarfreglr: dwarfRegLR, 48 TrampLimit: 0x1c00000, // 24-bit signed offset * 4, leave room for PLT etc. 49 50 Plan9Magic: 0x647, 51 52 Adddynrel: adddynrel, 53 Archinit: archinit, 54 Archreloc: archreloc, 55 Archrelocvariant: archrelocvariant, 56 Extreloc: extreloc, 57 Trampoline: trampoline, 58 Gentext: gentext, 59 Machoreloc1: machoreloc1, 60 PEreloc1: pereloc1, 61 62 ELF: ld.ELFArch{ 63 Linuxdynld: "/lib/ld-linux.so.3", // 2 for OABI, 3 for EABI 64 LinuxdynldMusl: "/lib/ld-musl-arm.so.1", 65 Freebsddynld: "/usr/libexec/ld-elf.so.1", 66 Openbsddynld: "/usr/libexec/ld.so", 67 Netbsddynld: "/libexec/ld.elf_so", 68 Dragonflydynld: "XXX", 69 Solarisdynld: "XXX", 70 71 Reloc1: elfreloc1, 72 RelocSize: 8, 73 SetupPLT: elfsetupplt, 74 }, 75 } 76 77 return arch, theArch 78 } 79 80 func archinit(ctxt *ld.Link) { 81 switch ctxt.HeadType { 82 default: 83 ld.Exitf("unknown -H option: %v", ctxt.HeadType) 84 85 case objabi.Hplan9: /* plan 9 */ 86 ld.HEADR = 32 87 if *ld.FlagRound == -1 { 88 *ld.FlagRound = 4096 89 } 90 if *ld.FlagTextAddr == -1 { 91 *ld.FlagTextAddr = ld.Rnd(4096, *ld.FlagRound) + int64(ld.HEADR) 92 } 93 94 case objabi.Hlinux, /* arm elf */ 95 objabi.Hfreebsd, 96 objabi.Hnetbsd, 97 objabi.Hopenbsd: 98 *ld.FlagD = false 99 // with dynamic linking 100 ld.Elfinit(ctxt) 101 ld.HEADR = ld.ELFRESERVE 102 if *ld.FlagRound == -1 { 103 *ld.FlagRound = 0x10000 104 } 105 if *ld.FlagTextAddr == -1 { 106 *ld.FlagTextAddr = ld.Rnd(0x10000, *ld.FlagRound) + int64(ld.HEADR) 107 } 108 109 case objabi.Hwindows: /* PE executable */ 110 // ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit 111 return 112 } 113 } 114