mirror of
https://github.com/golang/go
synced 2024-11-26 14:46:47 -07:00
add nm
R=r DELTA=339 (339 added, 0 deleted, 0 changed) OCL=13786 CL=13794
This commit is contained in:
Russ Cox
parent
34514bdb72
commit
7b3771401c
@ -50,3 +50,8 @@ echo; echo; echo %%%% making db %%%%; echo
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cd db
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make install
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cd ..
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echo; echo; echo %%%% making nm %%%%; echo
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cd nm
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make install
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cd ..
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24
src/cmd/nm/Makefile
Normal file
24
src/cmd/nm/Makefile
Normal file
@ -0,0 +1,24 @@
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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include ../../Make.conf
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# The directory is nm because the source is portable and general.
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# We call the binary 6nm to avoid confusion and because this binary
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# is linked only with amd64 and x86 support.
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TARG=6nm
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OFILES=\
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nm.$O\
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$(TARG): $(OFILES)
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$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lmach_amd64 -lbio -l9
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clean:
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rm -f $(OFILES) $(TARG)
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install: $(TARG)
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cp $(TARG) $(BIN)/$(TARG)
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$(OFILES): $(HFILES)
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344
src/cmd/nm/nm.c
Normal file
344
src/cmd/nm/nm.c
Normal file
@ -0,0 +1,344 @@
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// Inferno utils/nm/nm.c
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// http://code.google.com/p/inferno-os/source/browse/utils/nm/nm.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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/*
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* nm.c -- drive nm
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*/
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#include <u.h>
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#include <libc.h>
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#include <ar.h>
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#include <bio.h>
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#include <mach_amd64.h>
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enum{
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CHUNK = 256 /* must be power of 2 */
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};
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char *errs; /* exit status */
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char *filename; /* current file */
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char symname[]="__.SYMDEF"; /* table of contents file name */
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int multifile; /* processing multiple files */
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int aflag;
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int gflag;
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int hflag;
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int nflag;
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int sflag;
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int uflag;
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int Tflag;
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Sym **fnames; /* file path translation table */
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Sym **symptr;
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int nsym;
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Biobuf bout;
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int cmp(void*, void*);
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void error(char*, ...);
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void execsyms(int);
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void psym(Sym*, void*);
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void printsyms(Sym**, long);
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void doar(Biobuf*);
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void dofile(Biobuf*);
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void zenter(Sym*);
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void
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usage(void)
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{
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fprint(2, "usage: nm [-aghnsTu] file ...\n");
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exits("usage");
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}
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void
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main(int argc, char *argv[])
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{
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int i;
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Biobuf *bin;
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Binit(&bout, 1, OWRITE);
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argv0 = argv[0];
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ARGBEGIN {
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default: usage();
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case 'a': aflag = 1; break;
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case 'g': gflag = 1; break;
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case 'h': hflag = 1; break;
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case 'n': nflag = 1; break;
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case 's': sflag = 1; break;
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case 'u': uflag = 1; break;
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case 'T': Tflag = 1; break;
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} ARGEND
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if (argc == 0)
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usage();
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if (argc > 1)
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multifile++;
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for(i=0; i<argc; i++){
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filename = argv[i];
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bin = Bopen(filename, OREAD);
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if(bin == 0){
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error("cannot open %s", filename);
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continue;
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}
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if (isar(bin))
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doar(bin);
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else{
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Bseek(bin, 0, 0);
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dofile(bin);
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}
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Bterm(bin);
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}
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exits(errs);
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}
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/*
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* read an archive file,
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* processing the symbols for each intermediate file in it.
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*/
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void
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doar(Biobuf *bp)
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{
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int offset, size, obj;
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char membername[SARNAME];
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multifile = 1;
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for (offset = Boffset(bp);;offset += size) {
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size = nextar(bp, offset, membername);
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if (size < 0) {
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error("phase error on ar header %ld", offset);
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return;
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}
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if (size == 0)
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return;
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if (strcmp(membername, symname) == 0)
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continue;
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obj = objtype(bp, 0);
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if (obj < 0) {
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error("inconsistent file %s in %s",
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membername, filename);
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return;
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}
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if (!readar(bp, obj, offset+size, 1)) {
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error("invalid symbol reference in file %s",
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membername);
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return;
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}
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filename = membername;
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nsym=0;
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objtraverse(psym, 0);
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printsyms(symptr, nsym);
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}
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}
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/*
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* process symbols in a file
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*/
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void
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dofile(Biobuf *bp)
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{
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int obj;
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obj = objtype(bp, 0);
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if (obj < 0)
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execsyms(Bfildes(bp));
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else
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if (readobj(bp, obj)) {
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nsym = 0;
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objtraverse(psym, 0);
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printsyms(symptr, nsym);
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}
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}
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/*
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* comparison routine for sorting the symbol table
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* this screws up on 'z' records when aflag == 1
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*/
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int
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cmp(void *vs, void *vt)
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{
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Sym **s, **t;
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s = vs;
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t = vt;
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if(nflag)
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if((*s)->value < (*t)->value)
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return -1;
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else
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return (*s)->value > (*t)->value;
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return strcmp((*s)->name, (*t)->name);
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}
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/*
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* enter a symbol in the table of filename elements
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*/
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void
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zenter(Sym *s)
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{
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static int maxf = 0;
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if (s->value > maxf) {
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maxf = (s->value+CHUNK-1) &~ (CHUNK-1);
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fnames = realloc(fnames, (maxf+1)*sizeof(*fnames));
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if(fnames == 0) {
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error("out of memory", argv0);
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exits("memory");
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}
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}
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fnames[s->value] = s;
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}
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/*
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* get the symbol table from an executable file, if it has one
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*/
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void
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execsyms(int fd)
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{
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Fhdr f;
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Sym *s;
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int32 n;
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seek(fd, 0, 0);
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if (crackhdr(fd, &f) == 0) {
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error("Can't read header for %s", filename);
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return;
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}
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if (syminit(fd, &f) < 0)
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return;
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s = symbase(&n);
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nsym = 0;
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while(n--)
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psym(s++, 0);
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printsyms(symptr, nsym);
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}
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void
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psym(Sym *s, void* p)
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{
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USED(p);
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switch(s->type) {
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case 'T':
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case 'L':
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case 'D':
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case 'B':
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if (uflag)
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return;
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if (!aflag && ((s->name[0] == '.' || s->name[0] == '$')))
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return;
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break;
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case 'b':
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case 'd':
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case 'l':
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case 't':
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if (uflag || gflag)
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return;
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if (!aflag && ((s->name[0] == '.' || s->name[0] == '$')))
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return;
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break;
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case 'U':
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if (gflag)
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return;
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break;
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case 'Z':
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if (!aflag)
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return;
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break;
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case 'm':
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case 'f': /* we only see a 'z' when the following is true*/
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if(!aflag || uflag || gflag)
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return;
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if (strcmp(s->name, ".frame"))
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zenter(s);
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break;
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case 'a':
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case 'p':
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case 'z':
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default:
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if(!aflag || uflag || gflag)
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return;
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break;
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}
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symptr = realloc(symptr, (nsym+1)*sizeof(Sym*));
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if (symptr == 0) {
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error("out of memory");
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exits("memory");
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}
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symptr[nsym++] = s;
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}
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void
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printsyms(Sym **symptr, long nsym)
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{
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int i, wid;
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Sym *s;
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char *cp;
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char path[512];
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if(!sflag)
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qsort(symptr, nsym, sizeof(*symptr), (void*)cmp);
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wid = 0;
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for (i=0; i<nsym; i++) {
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s = symptr[i];
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if (s->value && wid == 0)
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wid = 8;
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else if (s->value >= 0x100000000LL && wid == 8)
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wid = 16;
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}
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for (i=0; i<nsym; i++) {
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s = symptr[i];
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if (multifile && !hflag)
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Bprint(&bout, "%s:", filename);
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if (s->type == 'z') {
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fileelem(fnames, (uchar *) s->name, path, 512);
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cp = path;
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} else
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cp = s->name;
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if (Tflag)
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Bprint(&bout, "%8ux ", s->sig);
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if (s->value || s->type == 'a' || s->type == 'p')
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Bprint(&bout, "%*llux ", wid, s->value);
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else
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Bprint(&bout, "%*s ", wid, "");
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Bprint(&bout, "%c %s\n", s->type, cp);
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}
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}
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void
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error(char *fmt, ...)
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{
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Fmt f;
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char buf[128];
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va_list arg;
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fmtfdinit(&f, 2, buf, sizeof buf);
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fmtprint(&f, "%s: ", argv0);
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va_start(arg, fmt);
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fmtvprint(&f, fmt, arg);
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va_end(arg);
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fmtprint(&f, "\n");
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fmtfdflush(&f);
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errs = "errors";
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}
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