1 // Derived from Inferno utils/6l/obj.c and utils/6l/span.c
2 // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/obj.c
3 // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/span.c
5 // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
6 // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
7 // Portions Copyright © 1997-1999 Vita Nuova Limited
8 // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
9 // Portions Copyright © 2004,2006 Bruce Ellis
10 // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
11 // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
12 // Portions Copyright © 2009 The Go Authors. All rights reserved.
14 // Permission is hereby granted, free of charge, to any person obtaining a copy
15 // of this software and associated documentation files (the "Software"), to deal
16 // in the Software without restriction, including without limitation the rights
17 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 // copies of the Software, and to permit persons to whom the Software is
19 // furnished to do so, subject to the following conditions:
21 // The above copyright notice and this permission notice shall be included in
22 // all copies or substantial portions of the Software.
24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
27 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
37 "cmd/link/internal/loader"
38 "cmd/link/internal/sym"
43 func linknew(arch *sys.Arch) *Link {
44 ler := loader.ErrorReporter{AfterErrorAction: afterErrorAction}
46 Target: Target{Arch: arch},
47 version: sym.SymVerStatic,
48 outSem: make(chan int, 2*runtime.GOMAXPROCS(0)),
50 LibraryByPkg: make(map[string]*sym.Library),
52 ErrorReporter: ErrorReporter{ErrorReporter: ler},
53 generatorSyms: make(map[loader.Sym]generatorFunc),
56 if objabi.GOARCH != arch.Name {
57 log.Fatalf("invalid objabi.GOARCH %s (want %s)", objabi.GOARCH, arch.Name)
70 // computeTLSOffset records the thread-local storage offset.
71 // Not used for Android where the TLS offset is determined at runtime.
72 func (ctxt *Link) computeTLSOffset() {
73 switch ctxt.HeadType {
75 log.Fatalf("unknown thread-local storage offset for %v", ctxt.HeadType)
77 case objabi.Hplan9, objabi.Hwindows, objabi.Hjs, objabi.Haix:
87 * ELF uses TLS offset negative from FS.
88 * Translate 0(FS) and 8(FS) into -16(FS) and -8(FS).
89 * Known to low-level assembly in package runtime and runtime/cgo.
91 ctxt.Tlsoffset = -1 * ctxt.Arch.PtrSize
95 * OS X system constants - offset from 0(GS) to our TLS.
97 switch ctxt.Arch.Family {
99 log.Fatalf("unknown thread-local storage offset for darwin/%s", ctxt.Arch.Name)
102 * For x86, Apple has reserved a slot in the TLS for Go. See issue 23617.
103 * That slot is at offset 0x30 on amd64.
104 * The slot will hold the G pointer.
105 * These constants should match those in runtime/sys_darwin_amd64.s
106 * and runtime/cgo/gcc_darwin_amd64.c.
109 ctxt.Tlsoffset = 0x30
112 ctxt.Tlsoffset = 0 // dummy value, not needed