Add capability to read archives (from Thomas Eberhardt; PR#497).
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pk
parent
16060cce1f
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ca1b8e8285
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@ -1,4 +1,4 @@
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.\" $NetBSD: size.1,v 1.5 1994/12/21 08:07:20 jtc Exp $
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.\" $NetBSD: size.1,v 1.6 1996/01/14 23:07:11 pk Exp $
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.\"
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.\" Copyright (c) 1990, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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@ -41,19 +41,31 @@
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.Nd display object file segment sizes (text, data and bss)
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.Sh SYNOPSIS
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.Nm size
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.Op Ar object_file ...
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.Op Fl w
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.Ar
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.Sh DESCRIPTION
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.Nm Size
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displays the text, data and bss segment sizes of the specified
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.Ar object_file
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.Ar file(s)
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in bytes (in decimal), and the sum of the three segments (in
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decimal and hexadecimal).
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If a library (archive) is given,
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.Nm
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displays the segment sizes for each object archive member.
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If no
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.Ar object_file
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.Ar file
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is specified
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.Nm
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attempts to report on the file
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.Pa a.out .
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.Bl -tag -width flag
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.It Fl w
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Warn about non-object archive members.
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Normally,
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.Nm
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will silently ignore all archive members which are not
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object files.
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.El
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.Sh SEE ALSO
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.Xr a.out 5
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.Sh HISTORY
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@ -1,4 +1,4 @@
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/* $NetBSD: size.c,v 1.6 1994/12/21 08:07:21 jtc Exp $ */
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/* $NetBSD: size.c,v 1.7 1996/01/14 23:07:12 pk Exp $ */
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/*
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* Copyright (c) 1988, 1993
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@ -43,18 +43,26 @@ static char copyright[] =
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#if 0
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static char sccsid[] = "@(#)size.c 8.2 (Berkeley) 12/9/93";
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#endif
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static char rcsid[] = "$NetBSD: size.c,v 1.6 1994/12/21 08:07:21 jtc Exp $";
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static char rcsid[] = "$NetBSD: size.c,v 1.7 1996/01/14 23:07:12 pk Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/file.h>
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#include <a.out.h>
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#include <ar.h>
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#include <ranlib.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <err.h>
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int show __P((int, char *));
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int ignore_bad_archive_entries = 1;
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int process_file __P((int, char *));
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int show_archive __P((int, char *, FILE *));
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int show_object __P((int, char *, FILE *));
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void *emalloc __P((size_t));
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void *erealloc __P((void *, size_t));
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void usage __P((void));
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int
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@ -64,8 +72,11 @@ main(argc, argv)
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{
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int ch, eval;
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while ((ch = getopt(argc, argv, "")) != EOF)
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while ((ch = getopt(argc, argv, "w")) != EOF)
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switch(ch) {
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case 'w':
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ignore_bad_archive_entries = 0;
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break;
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case '?':
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default:
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usage();
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@ -76,33 +87,191 @@ main(argc, argv)
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eval = 0;
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if (*argv)
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do {
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eval |= show(argc, *argv);
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eval |= process_file(argc, *argv);
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} while (*++argv);
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else
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eval |= show(1, "a.out");
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eval |= process_file(1, "a.out");
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exit(eval);
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}
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/*
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* process_file()
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* show symbols in the file given as an argument. Accepts archive and
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* object files as input.
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*/
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int
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show(count, name)
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process_file(count, fname)
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int count;
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char *fname;
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{
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struct exec exec_head;
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FILE *fp;
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int retval;
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char magic[SARMAG];
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if (!(fp = fopen(fname, "r"))) {
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warnx("cannot read %s", fname);
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return(1);
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}
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/*
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* first check whether this is an object file - read a object
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* header, and skip back to the beginning
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*/
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if (fread((char *)&exec_head, sizeof(exec_head), (size_t)1, fp) != 1) {
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warnx("%s: bad format", fname);
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(void)fclose(fp);
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return(1);
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}
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rewind(fp);
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/* this could be an archive */
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if (N_BADMAG(exec_head)) {
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if (fread(magic, sizeof(magic), (size_t)1, fp) != 1 ||
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strncmp(magic, ARMAG, SARMAG)) {
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warnx("%s: not object file or archive", fname);
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(void)fclose(fp);
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return(1);
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}
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retval = show_archive(count, fname, fp);
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} else
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retval = show_objfile(count, fname, fp);
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(void)fclose(fp);
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return(retval);
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}
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/*
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* show_archive()
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* show symbols in the given archive file
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*/
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int
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show_archive(count, fname, fp)
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int count;
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char *fname;
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FILE *fp;
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{
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struct ar_hdr ar_head;
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struct exec exec_head;
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int i, rval;
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long last_ar_off;
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char *p, *name;
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int baselen, namelen;
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baselen = strlen(fname) + 3;
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namelen = sizeof(ar_head.ar_name);
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name = emalloc(baselen + namelen);
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rval = 0;
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/* while there are more entries in the archive */
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while (fread((char *)&ar_head, sizeof(ar_head), (size_t)1, fp) == 1) {
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/* bad archive entry - stop processing this archive */
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if (strncmp(ar_head.ar_fmag, ARFMAG, sizeof(ar_head.ar_fmag))) {
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warnx("%s: bad format archive header", fname);
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(void)free(name);
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return(1);
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}
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/* remember start position of current archive object */
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last_ar_off = ftell(fp);
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/* skip ranlib entries */
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if (!strncmp(ar_head.ar_name, RANLIBMAG, sizeof(RANLIBMAG) - 1))
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goto skip;
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/*
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* construct a name of the form "archive.a:obj.o:" for the
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* current archive entry if the object name is to be printed
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* on each output line
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*/
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p = name;
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if (count > 1)
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p += sprintf(p, "%s:", fname);
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#ifdef AR_EFMT1
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/*
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* BSD 4.4 extended AR format: #1/<namelen>, with name as the
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* first <namelen> bytes of the file
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*/
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if ( (ar_head.ar_name[0] == '#') &&
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(ar_head.ar_name[1] == '1') &&
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(ar_head.ar_name[2] == '/') &&
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(isdigit(ar_head.ar_name[3]))) {
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int len = atoi(&ar_head.ar_name[3]);
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if (len > namelen) {
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p -= (long)name;
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name = (char *)erealloc(name, baselen+len);
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namelen = len;
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p += (long)name;
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}
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if (fread(p, len, 1, fp) != 1) {
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(void)fprintf(stderr,
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"nm: %s: premature EOF.\n", name);
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(void)free(name);
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return 1;
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}
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p += len;
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} else
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#endif
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for (i = 0; i < sizeof(ar_head.ar_name); ++i)
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if (ar_head.ar_name[i] && ar_head.ar_name[i] != ' ')
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*p++ = ar_head.ar_name[i];
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*p++ = '\0';
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/* get and check current object's header */
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if (fread((char *)&exec_head, sizeof(exec_head),
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(size_t)1, fp) != 1) {
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warnx("%s: premature EOF", name);
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(void)free(name);
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return(1);
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}
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if (N_BADMAG(exec_head)) {
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if (!ignore_bad_archive_entries) {
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warnx("%s: bad format", name);
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rval = 1;
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}
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} else {
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(void)fseek(fp, (long)-sizeof(exec_head),
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SEEK_CUR);
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rval |= show_objfile(2, name, fp);
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}
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/*
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* skip to next archive object - it starts at the next
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* even byte boundary
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*/
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#define even(x) (((x) + 1) & ~1)
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skip: if (fseek(fp, last_ar_off + even(atol(ar_head.ar_size)),
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SEEK_SET)) {
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warn("%s", fname);
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(void)free(name);
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return(1);
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}
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}
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(void)free(name);
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return(rval);
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}
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int
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show_objfile(count, name, fp)
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int count;
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char *name;
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FILE *fp;
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{
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static int first = 1;
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struct exec head;
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u_long total;
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int fd;
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if ((fd = open(name, O_RDONLY, 0)) < 0) {
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warn("%s", name);
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return (1);
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if (fread((char *)&head, sizeof(head), (size_t)1, fp) != 1) {
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warnx("%s: cannot read header", name);
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return(1);
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}
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if (read(fd, &head, sizeof(head)) != sizeof(head) || N_BADMAG(head)) {
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(void)close(fd);
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warnx("%s: not in a.out format", name);
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return (1);
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if (N_BADMAG(head)) {
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warnx("%s: bad format", name);
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return(1);
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}
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(void)close(fd);
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if (first) {
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first = 0;
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@ -117,9 +286,32 @@ show(count, name)
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return (0);
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}
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void *
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emalloc(size)
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size_t size;
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{
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char *p;
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/* NOSTRICT */
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if (p = malloc(size))
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return(p);
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err(1, NULL);
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}
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void *
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erealloc(p, size)
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void *p;
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size_t size;
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{
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/* NOSTRICT */
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if (p = realloc(p, size))
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return(p);
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err(1, NULL);
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: size [file ...]\n");
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(void)fprintf(stderr, "usage: size [-w] [file ...]\n");
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exit(1);
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}
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