1 // Inferno utils/5l/obj.c
2 // http://code.google.com/p/inferno-os/source/browse/utils/5l/obj.c
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.
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:
20 // The above copyright notice and this permission notice shall be included in
21 // all copies or substantial portions of the Software.
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
36 "cmd/link/internal/ld"
41 // Reading object files.
49 ld.SysArch = sys.ArchARM
51 ld.Thearch.Funcalign = FuncAlign
52 ld.Thearch.Maxalign = MaxAlign
53 ld.Thearch.Minalign = MinAlign
54 ld.Thearch.Dwarfregsp = DWARFREGSP
55 ld.Thearch.Dwarfreglr = DWARFREGLR
57 ld.Thearch.Adddynrel = adddynrel
58 ld.Thearch.Archinit = archinit
59 ld.Thearch.Archreloc = archreloc
60 ld.Thearch.Archrelocvariant = archrelocvariant
61 ld.Thearch.Asmb = asmb
62 ld.Thearch.Elfreloc1 = elfreloc1
63 ld.Thearch.Elfsetupplt = elfsetupplt
64 ld.Thearch.Gentext = gentext
65 ld.Thearch.Machoreloc1 = machoreloc1
66 ld.Thearch.Lput = ld.Lputl
67 ld.Thearch.Wput = ld.Wputl
68 ld.Thearch.Vput = ld.Vputl
69 ld.Thearch.Append16 = ld.Append16l
70 ld.Thearch.Append32 = ld.Append32l
71 ld.Thearch.Append64 = ld.Append64l
73 ld.Thearch.Linuxdynld = "/lib/ld-linux.so.3" // 2 for OABI, 3 for EABI
74 ld.Thearch.Freebsddynld = "/usr/libexec/ld-elf.so.1"
75 ld.Thearch.Openbsddynld = "/usr/libexec/ld.so"
76 ld.Thearch.Netbsddynld = "/libexec/ld.elf_so"
77 ld.Thearch.Dragonflydynld = "XXX"
78 ld.Thearch.Solarisdynld = "XXX"
82 // getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
83 // Go was built; see ../../make.bash.
84 if ld.Linkmode == ld.LinkAuto && obj.Getgoextlinkenabled() == "0" {
85 ld.Linkmode = ld.LinkInternal
88 if ld.Buildmode == ld.BuildmodeCArchive || ld.Buildmode == ld.BuildmodeCShared || ld.DynlinkingGo() {
89 ld.Linkmode = ld.LinkExternal
94 if ld.Linkmode == ld.LinkAuto {
95 ld.Linkmode = ld.LinkInternal
97 if ld.Linkmode == ld.LinkExternal && obj.Getgoextlinkenabled() != "1" {
98 log.Fatalf("cannot use -linkmode=external with -H %s", ld.Headstr(int(ld.HEADTYPE)))
110 ld.Exitf("unknown -H option: %v", ld.HEADTYPE)
112 case obj.Hplan9: /* plan 9 */
115 if ld.INITTEXT == -1 {
118 if ld.INITDAT == -1 {
121 if ld.INITRND == -1 {
125 case obj.Hlinux, /* arm elf */
130 // with dynamic linking
132 ld.HEADR = ld.ELFRESERVE
133 if ld.INITTEXT == -1 {
134 ld.INITTEXT = 0x10000 + int64(ld.HEADR)
136 if ld.INITDAT == -1 {
139 if ld.INITRND == -1 {
147 if ld.INITTEXT == -1 {
148 ld.INITTEXT = 0x20000
150 if ld.INITDAT == -1 {
153 if ld.INITRND == -1 {
157 case obj.Hdarwin: /* apple MACH */
158 ld.Debug['w'] = 1 // disable DWARF generation
160 ld.HEADR = ld.INITIAL_MACHO_HEADR
161 if ld.INITTEXT == -1 {
162 ld.INITTEXT = 4096 + int64(ld.HEADR)
164 if ld.INITDAT == -1 {
167 if ld.INITRND == -1 {
172 if ld.INITDAT != 0 && ld.INITRND != 0 {
173 fmt.Printf("warning: -D0x%x is ignored because of -R0x%x\n", uint64(ld.INITDAT), uint32(ld.INITRND))