| // Derived from Inferno utils/6l/obj.c and utils/6l/span.c |
| // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/obj.c |
| // https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/span.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 ( |
| "cmd/oldlink/internal/sym" |
| "io/ioutil" |
| "log" |
| "os" |
| "path" |
| "path/filepath" |
| "strconv" |
| "strings" |
| ) |
| |
| func (ctxt *Link) readImportCfg(file string) { |
| ctxt.PackageFile = make(map[string]string) |
| ctxt.PackageShlib = make(map[string]string) |
| data, err := ioutil.ReadFile(file) |
| if err != nil { |
| log.Fatalf("-importcfg: %v", err) |
| } |
| |
| for lineNum, line := range strings.Split(string(data), "\n") { |
| lineNum++ // 1-based |
| line = strings.TrimSpace(line) |
| if line == "" { |
| continue |
| } |
| if line == "" || strings.HasPrefix(line, "#") { |
| continue |
| } |
| |
| var verb, args string |
| if i := strings.Index(line, " "); i < 0 { |
| verb = line |
| } else { |
| verb, args = line[:i], strings.TrimSpace(line[i+1:]) |
| } |
| var before, after string |
| if i := strings.Index(args, "="); i >= 0 { |
| before, after = args[:i], args[i+1:] |
| } |
| switch verb { |
| default: |
| log.Fatalf("%s:%d: unknown directive %q", file, lineNum, verb) |
| case "packagefile": |
| if before == "" || after == "" { |
| log.Fatalf(`%s:%d: invalid packagefile: syntax is "packagefile path=filename"`, file, lineNum) |
| } |
| ctxt.PackageFile[before] = after |
| case "packageshlib": |
| if before == "" || after == "" { |
| log.Fatalf(`%s:%d: invalid packageshlib: syntax is "packageshlib path=filename"`, file, lineNum) |
| } |
| ctxt.PackageShlib[before] = after |
| } |
| } |
| } |
| |
| func pkgname(ctxt *Link, lib string) string { |
| name := path.Clean(lib) |
| |
| // When using importcfg, we have the final package name. |
| if ctxt.PackageFile != nil { |
| return name |
| } |
| |
| // runtime.a -> runtime, runtime.6 -> runtime |
| pkg := name |
| if len(pkg) >= 2 && pkg[len(pkg)-2] == '.' { |
| pkg = pkg[:len(pkg)-2] |
| } |
| return pkg |
| } |
| |
| func findlib(ctxt *Link, lib string) (string, bool) { |
| name := path.Clean(lib) |
| |
| var pname string |
| isshlib := false |
| |
| if ctxt.linkShared && ctxt.PackageShlib[name] != "" { |
| pname = ctxt.PackageShlib[name] |
| isshlib = true |
| } else if ctxt.PackageFile != nil { |
| pname = ctxt.PackageFile[name] |
| if pname == "" { |
| ctxt.Logf("cannot find package %s (using -importcfg)\n", name) |
| return "", false |
| } |
| } else { |
| if filepath.IsAbs(name) { |
| pname = name |
| } else { |
| pkg := pkgname(ctxt, lib) |
| // Add .a if needed; the new -importcfg modes |
| // do not put .a into the package name anymore. |
| // This only matters when people try to mix |
| // compiles using -importcfg with links not using -importcfg, |
| // such as when running quick things like |
| // 'go tool compile x.go && go tool link x.o' |
| // by hand against a standard library built using -importcfg. |
| if !strings.HasSuffix(name, ".a") && !strings.HasSuffix(name, ".o") { |
| name += ".a" |
| } |
| // try dot, -L "libdir", and then goroot. |
| for _, dir := range ctxt.Libdir { |
| if ctxt.linkShared { |
| pname = filepath.Join(dir, pkg+".shlibname") |
| if _, err := os.Stat(pname); err == nil { |
| isshlib = true |
| break |
| } |
| } |
| pname = filepath.Join(dir, name) |
| if _, err := os.Stat(pname); err == nil { |
| break |
| } |
| } |
| } |
| pname = filepath.Clean(pname) |
| } |
| |
| return pname, isshlib |
| } |
| |
| func addlib(ctxt *Link, src string, obj string, lib string) *sym.Library { |
| pkg := pkgname(ctxt, lib) |
| |
| // already loaded? |
| if l := ctxt.LibraryByPkg[pkg]; l != nil { |
| return l |
| } |
| |
| pname, isshlib := findlib(ctxt, lib) |
| |
| if ctxt.Debugvlog > 1 { |
| ctxt.Logf("addlib: %s %s pulls in %s isshlib %v\n", obj, src, pname, isshlib) |
| } |
| |
| if isshlib { |
| return addlibpath(ctxt, src, obj, "", pkg, pname) |
| } |
| return addlibpath(ctxt, src, obj, pname, pkg, "") |
| } |
| |
| /* |
| * add library to library list, return added library. |
| * srcref: src file referring to package |
| * objref: object file referring to package |
| * file: object file, e.g., /home/rsc/go/pkg/container/vector.a |
| * pkg: package import path, e.g. container/vector |
| * shlib: path to shared library, or .shlibname file holding path |
| */ |
| func addlibpath(ctxt *Link, srcref string, objref string, file string, pkg string, shlib string) *sym.Library { |
| if l := ctxt.LibraryByPkg[pkg]; l != nil { |
| return l |
| } |
| |
| if ctxt.Debugvlog > 1 { |
| ctxt.Logf("addlibpath: srcref: %s objref: %s file: %s pkg: %s shlib: %s\n", srcref, objref, file, pkg, shlib) |
| } |
| |
| l := &sym.Library{} |
| ctxt.LibraryByPkg[pkg] = l |
| ctxt.Library = append(ctxt.Library, l) |
| l.Objref = objref |
| l.Srcref = srcref |
| l.File = file |
| l.Pkg = pkg |
| if shlib != "" { |
| if strings.HasSuffix(shlib, ".shlibname") { |
| data, err := ioutil.ReadFile(shlib) |
| if err != nil { |
| Errorf(nil, "cannot read %s: %v", shlib, err) |
| } |
| shlib = strings.TrimSpace(string(data)) |
| } |
| l.Shlib = shlib |
| } |
| return l |
| } |
| |
| func atolwhex(s string) int64 { |
| n, _ := strconv.ParseInt(s, 0, 64) |
| return n |
| } |
