1// Inferno utils/8l/obj.c 2// https://bitbucket.org/inferno-os/inferno-os/src/master/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 31package x86 32 33import ( 34 "cmd/internal/objabi" 35 "cmd/internal/sys" 36 "cmd/link/internal/ld" 37) 38 39func Init() (*sys.Arch, ld.Arch) { 40 arch := sys.Arch386 41 42 theArch := ld.Arch{ 43 Funcalign: funcAlign, 44 Maxalign: maxAlign, 45 Minalign: minAlign, 46 Dwarfregsp: dwarfRegSP, 47 Dwarfreglr: dwarfRegLR, 48 // 0xCC is INT $3 - breakpoint instruction 49 CodePad: []byte{0xCC}, 50 51 Plan9Magic: uint32(4*11*11 + 7), 52 53 Adddynrel: adddynrel, 54 Archinit: archinit, 55 Archreloc: archreloc, 56 Archrelocvariant: archrelocvariant, 57 Gentext: gentext, 58 Machoreloc1: machoreloc1, 59 PEreloc1: pereloc1, 60 61 ELF: ld.ELFArch{ 62 Linuxdynld: "/lib/ld-linux.so.2", 63 LinuxdynldMusl: "/lib/ld-musl-i386.so.1", 64 Freebsddynld: "/usr/libexec/ld-elf.so.1", 65 Openbsddynld: "/usr/libexec/ld.so", 66 Netbsddynld: "/usr/libexec/ld.elf_so", 67 Solarisdynld: "/lib/ld.so.1", 68 69 Reloc1: elfreloc1, 70 RelocSize: 8, 71 SetupPLT: elfsetupplt, 72 }, 73 } 74 75 return arch, theArch 76} 77 78func archinit(ctxt *ld.Link) { 79 switch ctxt.HeadType { 80 default: 81 ld.Exitf("unknown -H option: %v", ctxt.HeadType) 82 83 case objabi.Hplan9: /* plan 9 */ 84 ld.HEADR = 32 85 if *ld.FlagRound == -1 { 86 *ld.FlagRound = 4096 87 } 88 if *ld.FlagTextAddr == -1 { 89 *ld.FlagTextAddr = ld.Rnd(4096, *ld.FlagRound) + int64(ld.HEADR) 90 } 91 92 case objabi.Hlinux, /* elf32 executable */ 93 objabi.Hfreebsd, 94 objabi.Hnetbsd, 95 objabi.Hopenbsd: 96 ld.Elfinit(ctxt) 97 98 ld.HEADR = ld.ELFRESERVE 99 if *ld.FlagRound == -1 { 100 *ld.FlagRound = 4096 101 } 102 if *ld.FlagTextAddr == -1 { 103 *ld.FlagTextAddr = ld.Rnd(0x08048000, *ld.FlagRound) + int64(ld.HEADR) 104 } 105 106 case objabi.Hwindows: /* PE executable */ 107 // ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit 108 return 109 } 110} 111