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

     1	// Inferno utils/5l/obj.c
     2	// https://bitbucket.org/inferno-os/inferno-os/src/default/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	
    49			Adddynrel:        adddynrel,
    50			Archinit:         archinit,
    51			Archreloc:        archreloc,
    52			Archrelocvariant: archrelocvariant,
    53			Trampoline:       trampoline,
    54			Asmb:             asmb,
    55			Asmb2:            asmb2,
    56			Elfreloc1:        elfreloc1,
    57			Elfsetupplt:      elfsetupplt,
    58			Gentext:          gentext,
    59			Machoreloc1:      machoreloc1,
    60			PEreloc1:         pereloc1,
    61	
    62			Linuxdynld:     "/lib/ld-linux.so.3", // 2 for OABI, 3 for EABI
    63			Freebsddynld:   "/usr/libexec/ld-elf.so.1",
    64			Openbsddynld:   "/usr/libexec/ld.so",
    65			Netbsddynld:    "/libexec/ld.elf_so",
    66			Dragonflydynld: "XXX",
    67			Solarisdynld:   "XXX",
    68		}
    69	
    70		return arch, theArch
    71	}
    72	
    73	func archinit(ctxt *ld.Link) {
    74		switch ctxt.HeadType {
    75		default:
    76			ld.Exitf("unknown -H option: %v", ctxt.HeadType)
    77	
    78		case objabi.Hplan9: /* plan 9 */
    79			ld.HEADR = 32
    80	
    81			if *ld.FlagTextAddr == -1 {
    82				*ld.FlagTextAddr = 4128
    83			}
    84			if *ld.FlagRound == -1 {
    85				*ld.FlagRound = 4096
    86			}
    87	
    88		case objabi.Hlinux, /* arm elf */
    89			objabi.Hfreebsd,
    90			objabi.Hnetbsd,
    91			objabi.Hopenbsd:
    92			*ld.FlagD = false
    93			// with dynamic linking
    94			ld.Elfinit(ctxt)
    95			ld.HEADR = ld.ELFRESERVE
    96			if *ld.FlagTextAddr == -1 {
    97				*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
    98			}
    99			if *ld.FlagRound == -1 {
   100				*ld.FlagRound = 0x10000
   101			}
   102	
   103		case objabi.Hnacl:
   104			ld.Elfinit(ctxt)
   105			ld.HEADR = 0x10000
   106			ld.Funcalign = 16
   107			if *ld.FlagTextAddr == -1 {
   108				*ld.FlagTextAddr = 0x20000
   109			}
   110			if *ld.FlagRound == -1 {
   111				*ld.FlagRound = 0x10000
   112			}
   113	
   114		case objabi.Hdarwin: /* apple MACH */
   115			ld.HEADR = ld.INITIAL_MACHO_HEADR
   116			if *ld.FlagTextAddr == -1 {
   117				*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
   118			}
   119			if *ld.FlagRound == -1 {
   120				*ld.FlagRound = 4096
   121			}
   122	
   123		case objabi.Hwindows: /* PE executable */
   124			// ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit
   125			return
   126		}
   127	}
   128	

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