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      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 (a] 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 (a] 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 	"fmt"
     38 )
     39 
     40 func Init() (*sys.Arch, ld.Arch) {
     41 	arch := sys.ArchARM
     42 
     43 	theArch := ld.Arch{
     44 		Funcalign:  funcAlign,
     45 		Maxalign:   maxAlign,
     46 		Minalign:   minAlign,
     47 		Dwarfregsp: dwarfRegSP,
     48 		Dwarfreglr: dwarfRegLR,
     49 
     50 		Adddynrel:        adddynrel,
     51 		Archinit:         archinit,
     52 		Archreloc:        archreloc,
     53 		Archrelocvariant: archrelocvariant,
     54 		Trampoline:       trampoline,
     55 		Asmb:             asmb,
     56 		Elfreloc1:        elfreloc1,
     57 		Elfsetupplt:      elfsetupplt,
     58 		Gentext:          gentext,
     59 		Machoreloc1:      machoreloc1,
     60 
     61 		Linuxdynld:     "/lib/ld-linux.so.3", // 2 for OABI, 3 for EABI
     62 		Freebsddynld:   "/usr/libexec/ld-elf.so.1",
     63 		Openbsddynld:   "/usr/libexec/ld.so",
     64 		Netbsddynld:    "/libexec/ld.elf_so",
     65 		Dragonflydynld: "XXX",
     66 		Solarisdynld:   "XXX",
     67 	}
     68 
     69 	return arch, theArch
     70 }
     71 
     72 func archinit(ctxt *ld.Link) {
     73 	switch ctxt.HeadType {
     74 	default:
     75 		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
     76 
     77 	case objabi.Hplan9: /* plan 9 */
     78 		ld.HEADR = 32
     79 
     80 		if *ld.FlagTextAddr == -1 {
     81 			*ld.FlagTextAddr = 4128
     82 		}
     83 		if *ld.FlagDataAddr == -1 {
     84 			*ld.FlagDataAddr = 0
     85 		}
     86 		if *ld.FlagRound == -1 {
     87 			*ld.FlagRound = 4096
     88 		}
     89 
     90 	case objabi.Hlinux, /* arm elf */
     91 		objabi.Hfreebsd,
     92 		objabi.Hnetbsd,
     93 		objabi.Hopenbsd:
     94 		*ld.FlagD = false
     95 		// with dynamic linking
     96 		ld.Elfinit(ctxt)
     97 		ld.HEADR = ld.ELFRESERVE
     98 		if *ld.FlagTextAddr == -1 {
     99 			*ld.FlagTextAddr = 0x10000 + int64(ld.HEADR)
    100 		}
    101 		if *ld.FlagDataAddr == -1 {
    102 			*ld.FlagDataAddr = 0
    103 		}
    104 		if *ld.FlagRound == -1 {
    105 			*ld.FlagRound = 0x10000
    106 		}
    107 
    108 	case objabi.Hnacl:
    109 		ld.Elfinit(ctxt)
    110 		ld.HEADR = 0x10000
    111 		ld.Funcalign = 16
    112 		if *ld.FlagTextAddr == -1 {
    113 			*ld.FlagTextAddr = 0x20000
    114 		}
    115 		if *ld.FlagDataAddr == -1 {
    116 			*ld.FlagDataAddr = 0
    117 		}
    118 		if *ld.FlagRound == -1 {
    119 			*ld.FlagRound = 0x10000
    120 		}
    121 
    122 	case objabi.Hdarwin: /* apple MACH */
    123 		*ld.FlagW = true // disable DWARF generation
    124 		ld.HEADR = ld.INITIAL_MACHO_HEADR
    125 		if *ld.FlagTextAddr == -1 {
    126 			*ld.FlagTextAddr = 4096 + int64(ld.HEADR)
    127 		}
    128 		if *ld.FlagDataAddr == -1 {
    129 			*ld.FlagDataAddr = 0
    130 		}
    131 		if *ld.FlagRound == -1 {
    132 			*ld.FlagRound = 4096
    133 		}
    134 	}
    135 
    136 	if *ld.FlagDataAddr != 0 && *ld.FlagRound != 0 {
    137 		fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(*ld.FlagDataAddr), uint32(*ld.FlagRound))
    138 	}
    139 }
    140