| // Inferno utils/6l/obj.c |
| // http://code.google.com/p/inferno-os/source/browse/utils/6l/obj.c |
| // |
| // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. |
| // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net) |
| // Portions Copyright © 1997-1999 Vita Nuova Limited |
| // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com) |
| // Portions Copyright © 2004,2006 Bruce Ellis |
| // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net) |
| // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others |
| // Portions Copyright © 2009 The Go Authors. All rights reserved. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| package ld |
| |
| import ( |
| "bufio" |
| "cmd/internal/obj" |
| "cmd/internal/sys" |
| "flag" |
| "fmt" |
| "os" |
| "strings" |
| ) |
| |
| var ( |
| pkglistfornote []byte |
| buildid string |
| ) |
| |
| func Ldmain() { |
| Bso = bufio.NewWriter(os.Stdout) |
| |
| Ctxt = linknew(SysArch) |
| Ctxt.Diag = Diag |
| Ctxt.Bso = Bso |
| |
| Debug = [128]int{} |
| nerrors = 0 |
| outfile = "" |
| HEADTYPE = -1 |
| INITTEXT = -1 |
| INITDAT = -1 |
| INITRND = -1 |
| INITENTRY = "" |
| Linkmode = LinkAuto |
| |
| // For testing behavior of go command when tools crash silently. |
| // Undocumented, not in standard flag parser to avoid |
| // exposing in usage message. |
| for _, arg := range os.Args { |
| if arg == "-crash_for_testing" { |
| os.Exit(2) |
| } |
| } |
| |
| if SysArch.Family == sys.AMD64 && obj.Getgoos() == "plan9" { |
| obj.Flagcount("8", "use 64-bit addresses in symbol table", &Debug['8']) |
| } |
| obj.Flagfn1("B", "add an ELF NT_GNU_BUILD_ID `note` when using ELF", addbuildinfo) |
| obj.Flagcount("C", "check Go calls to C code", &Debug['C']) |
| obj.Flagint64("D", "set data segment `address`", &INITDAT) |
| obj.Flagstr("E", "set `entry` symbol name", &INITENTRY) |
| obj.Flagfn1("I", "use `linker` as ELF dynamic linker", setinterp) |
| obj.Flagfn1("L", "add specified `directory` to library path", Lflag) |
| obj.Flagfn1("H", "set header `type`", setheadtype) |
| obj.Flagint32("R", "set address rounding `quantum`", &INITRND) |
| obj.Flagint64("T", "set text segment `address`", &INITTEXT) |
| obj.Flagfn0("V", "print version and exit", doversion) |
| obj.Flagfn1("X", "add string value `definition` of the form importpath.name=value", addstrdata1) |
| obj.Flagcount("a", "disassemble output", &Debug['a']) |
| obj.Flagstr("buildid", "record `id` as Go toolchain build id", &buildid) |
| flag.Var(&Buildmode, "buildmode", "set build `mode`") |
| obj.Flagcount("c", "dump call graph", &Debug['c']) |
| obj.Flagcount("d", "disable dynamic executable", &Debug['d']) |
| obj.Flagstr("extar", "archive program for buildmode=c-archive", &extar) |
| obj.Flagstr("extld", "use `linker` when linking in external mode", &extld) |
| obj.Flagstr("extldflags", "pass `flags` to external linker", &extldflags) |
| obj.Flagcount("f", "ignore version mismatch", &Debug['f']) |
| obj.Flagcount("g", "disable go package data checks", &Debug['g']) |
| obj.Flagcount("h", "halt on error", &Debug['h']) |
| obj.Flagstr("installsuffix", "set package directory `suffix`", &flag_installsuffix) |
| obj.Flagstr("k", "set field tracking `symbol`", &tracksym) |
| obj.Flagstr("libgcc", "compiler support lib for internal linking; use \"none\" to disable", &libgccfile) |
| obj.Flagfn1("linkmode", "set link `mode` (internal, external, auto)", setlinkmode) |
| flag.BoolVar(&Linkshared, "linkshared", false, "link against installed Go shared libraries") |
| obj.Flagcount("msan", "enable MSan interface", &flag_msan) |
| obj.Flagcount("n", "dump symbol table", &Debug['n']) |
| obj.Flagstr("o", "write output to `file`", &outfile) |
| flag.Var(&rpath, "r", "set the ELF dynamic linker search `path` to dir1:dir2:...") |
| obj.Flagcount("race", "enable race detector", &flag_race) |
| obj.Flagcount("s", "disable symbol table", &Debug['s']) |
| var flagShared int |
| if SysArch.InFamily(sys.ARM, sys.AMD64) { |
| obj.Flagcount("shared", "generate shared object (implies -linkmode external)", &flagShared) |
| } |
| obj.Flagstr("tmpdir", "use `directory` for temporary files", &tmpdir) |
| obj.Flagcount("u", "reject unsafe packages", &Debug['u']) |
| obj.Flagcount("v", "print link trace", &Debug['v']) |
| obj.Flagcount("w", "disable DWARF generation", &Debug['w']) |
| |
| obj.Flagstr("cpuprofile", "write cpu profile to `file`", &cpuprofile) |
| obj.Flagstr("memprofile", "write memory profile to `file`", &memprofile) |
| obj.Flagint64("memprofilerate", "set runtime.MemProfileRate to `rate`", &memprofilerate) |
| |
| obj.Flagparse(usage) |
| |
| startProfile() |
| Ctxt.Bso = Bso |
| Ctxt.Debugvlog = int32(Debug['v']) |
| if flagShared != 0 { |
| if Buildmode == BuildmodeUnset { |
| Buildmode = BuildmodeCShared |
| } else if Buildmode != BuildmodeCShared { |
| Exitf("-shared and -buildmode=%s are incompatible", Buildmode.String()) |
| } |
| } |
| if Buildmode == BuildmodeUnset { |
| Buildmode = BuildmodeExe |
| } |
| |
| if Buildmode != BuildmodeShared && flag.NArg() != 1 { |
| usage() |
| } |
| |
| if outfile == "" { |
| outfile = "a.out" |
| if HEADTYPE == obj.Hwindows { |
| outfile += ".exe" |
| } |
| } |
| |
| libinit() // creates outfile |
| |
| if HEADTYPE == -1 { |
| HEADTYPE = int32(headtype(goos)) |
| } |
| Ctxt.Headtype = int(HEADTYPE) |
| if headstring == "" { |
| headstring = Headstr(int(HEADTYPE)) |
| } |
| |
| Thearch.Archinit() |
| |
| if Linkshared && !Iself { |
| Exitf("-linkshared can only be used on elf systems") |
| } |
| |
| if Debug['v'] != 0 { |
| fmt.Fprintf(Bso, "HEADER = -H%d -T0x%x -D0x%x -R0x%x\n", HEADTYPE, uint64(INITTEXT), uint64(INITDAT), uint32(INITRND)) |
| } |
| Bso.Flush() |
| |
| if Buildmode == BuildmodeShared { |
| for i := 0; i < flag.NArg(); i++ { |
| arg := flag.Arg(i) |
| parts := strings.SplitN(arg, "=", 2) |
| var pkgpath, file string |
| if len(parts) == 1 { |
| pkgpath, file = "main", arg |
| } else { |
| pkgpath, file = parts[0], parts[1] |
| } |
| pkglistfornote = append(pkglistfornote, pkgpath...) |
| pkglistfornote = append(pkglistfornote, '\n') |
| addlibpath(Ctxt, "command line", "command line", file, pkgpath, "") |
| } |
| } else { |
| addlibpath(Ctxt, "command line", "command line", flag.Arg(0), "main", "") |
| } |
| loadlib() |
| |
| checkstrdata() |
| deadcode(Ctxt) |
| fieldtrack(Ctxt) |
| callgraph() |
| |
| doelf() |
| if HEADTYPE == obj.Hdarwin { |
| domacho() |
| } |
| dostkcheck() |
| if HEADTYPE == obj.Hwindows { |
| dope() |
| } |
| addexport() |
| Thearch.Gentext() // trampolines, call stubs, etc. |
| textbuildid() |
| textaddress() |
| pclntab() |
| findfunctab() |
| symtab() |
| dodata() |
| address() |
| reloc() |
| Thearch.Asmb() |
| undef() |
| hostlink() |
| archive() |
| if Debug['v'] != 0 { |
| fmt.Fprintf(Bso, "%5.2f cpu time\n", obj.Cputime()) |
| fmt.Fprintf(Bso, "%d symbols\n", len(Ctxt.Allsym)) |
| fmt.Fprintf(Bso, "%d liveness data\n", liveness) |
| } |
| |
| Bso.Flush() |
| |
| errorexit() |
| } |
