Source file src/pkg/cmd/link/internal/amd64/obj.go

     1	// Inferno utils/6l/obj.c
     2	// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/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 amd64
    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.ArchAMD64
    41		if objabi.GOARCH == "amd64p32" {
    42			arch = sys.ArchAMD64P32
    43		}
    44	
    45		theArch := ld.Arch{
    46			Funcalign:  funcAlign,
    47			Maxalign:   maxAlign,
    48			Minalign:   minAlign,
    49			Dwarfregsp: dwarfRegSP,
    50			Dwarfreglr: dwarfRegLR,
    51	
    52			Adddynrel:        adddynrel,
    53			Archinit:         archinit,
    54			Archreloc:        archreloc,
    55			Archrelocvariant: archrelocvariant,
    56			Asmb:             asmb,
    57			Asmb2:            asmb2,
    58			Elfreloc1:        elfreloc1,
    59			Elfsetupplt:      elfsetupplt,
    60			Gentext:          gentext,
    61			Machoreloc1:      machoreloc1,
    62			PEreloc1:         pereloc1,
    63			TLSIEtoLE:        tlsIEtoLE,
    64	
    65			Linuxdynld:     "/lib64/ld-linux-x86-64.so.2",
    66			Freebsddynld:   "/libexec/ld-elf.so.1",
    67			Openbsddynld:   "/usr/libexec/ld.so",
    68			Netbsddynld:    "/libexec/ld.elf_so",
    69			Dragonflydynld: "/usr/libexec/ld-elf.so.2",
    70			Solarisdynld:   "/lib/amd64/ld.so.1",
    71		}
    72	
    73		return arch, theArch
    74	}
    75	
    76	func archinit(ctxt *ld.Link) {
    77		switch ctxt.HeadType {
    78		default:
    79			ld.Exitf("unknown -H option: %v", ctxt.HeadType)
    80	
    81		case objabi.Hplan9: /* plan 9 */
    82			ld.HEADR = 32 + 8
    83	
    84			if *ld.FlagTextAddr == -1 {
    85				*ld.FlagTextAddr = 0x200000 + int64(ld.HEADR)
    86			}
    87			if *ld.FlagRound == -1 {
    88				*ld.FlagRound = 0x200000
    89			}
    90	
    91		case objabi.Hdarwin: /* apple MACH */
    92			ld.HEADR = ld.INITIAL_MACHO_HEADR
    93			if *ld.FlagRound == -1 {
    94				*ld.FlagRound = 4096
    95			}
    96			if *ld.FlagTextAddr == -1 {
    97				*ld.FlagTextAddr = 0x1000000 + int64(ld.HEADR)
    98			}
    99	
   100		case objabi.Hlinux, /* elf64 executable */
   101			objabi.Hfreebsd,   /* freebsd */
   102			objabi.Hnetbsd,    /* netbsd */
   103			objabi.Hopenbsd,   /* openbsd */
   104			objabi.Hdragonfly, /* dragonfly */
   105			objabi.Hsolaris:   /* solaris */
   106			ld.Elfinit(ctxt)
   107	
   108			ld.HEADR = ld.ELFRESERVE
   109			if *ld.FlagTextAddr == -1 {
   110				*ld.FlagTextAddr = (1 << 22) + int64(ld.HEADR)
   111			}
   112			if *ld.FlagRound == -1 {
   113				*ld.FlagRound = 4096
   114			}
   115	
   116		case objabi.Hnacl:
   117			ld.Elfinit(ctxt)
   118			*ld.FlagW = true // disable dwarf, which gets confused and is useless anyway
   119			ld.HEADR = 0x10000
   120			ld.Funcalign = 32
   121			if *ld.FlagTextAddr == -1 {
   122				*ld.FlagTextAddr = 0x20000
   123			}
   124			if *ld.FlagRound == -1 {
   125				*ld.FlagRound = 0x10000
   126			}
   127	
   128		case objabi.Hwindows: /* PE executable */
   129			// ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit
   130			return
   131		}
   132	}
   133	

View as plain text