release/src/btools/libfoo.pl

   1 #!/usr/bin/perl
   2 #
   3 #       libfoo.pl
   4 #       Copyright (C) 2006-2008 Jonathan Zarate
   5 #
   6 #       - strip un-needed objects
   7 #       - create xref of symbols used
   8 #
   9
  10 $root = $ENV{"TARGETDIR"};
  11 $uclibc = $ENV{"TOOLCHAIN"};
  12 $router = $ENV{"SRCBASE"} . "/router";
  13
  14 sub error
  15 {
  16         print STDERR "\n*** ERROR: " . (shift) . "\n\n";
  17         exit 1;
  18 }
  19
  20 sub basename
  21 {
  22         my $fn = shift;
  23         if ($fn =~ /([^\/]+)$/) {
  24                 return $1;
  25         }
  26         return $fn;
  27 }
  28
  29 sub load
  30 {
  31     my $fname = shift;
  32
  33         if ((-l $fname) ||
  34                 ($fname =~ /\/lib\/modules\/\d+\.\d+\.\d+/) ||
  35                 ($fname =~ /\.(asp|gif|png|svg|js|jsx|css|txt|pat|sh)$/)) {
  36                 return;
  37         }
  38
  39         if (-d $fname) {
  40                 my $d;
  41                 if (opendir($d, $fname)) {
  42                         foreach (readdir($d)) {
  43                                 if ($_ !~ /^\./) {
  44                                         load($fname . "/" . $_);
  45                                 }
  46                         }
  47                         closedir($d);
  48                 }
  49                 return;
  50         }
  51
  52
  53         my $f;
  54         my $base;
  55         my $ok;
  56         my $s;
  57
  58         $base = basename($fname);
  59         print LOG "\n\nreadelf $base:\n";
  60
  61         open($f, "mipsel-linux-readelf -WhsdD ${fname} 2>&1 |") || error("readelf - $!\n");
  62
  63         while (<$f>) {
  64                 print LOG;
  65
  66                 if (/\s+Type:\s+(\w+)/) {
  67                         $elf_type{$base} = $1;
  68                         $ok = 1;
  69                         last;
  70                 }
  71         }
  72
  73         if (!$ok) {
  74                 close($f);
  75                 return;
  76         }
  77
  78         print "$elf_type{$base} $base", " " x 30, "\r";
  79
  80         push(@elfs, $base);
  81
  82         while (<$f>) {
  83                 print LOG;
  84
  85                 if (/\(NEEDED\)\s+Shared library: \[(.+)\]/) {
  86                         push(@{$elf_lib{$base}}, $1);
  87                 }
  88                 elsif (/Symbol table for image:/) {
  89                         last;
  90                 }
  91         }
  92
  93         while (<$f>) {
  94                 print LOG;
  95
  96                 if (/\s+(WEAK|GLOBAL)\s+(?:DEFAULT|VISIBLE)\s+(\w+)\s+(\w+)/) {
  97                         $s = $3;
  98                         if ($2 eq 'UND') {
  99                                 if ($1 eq 'GLOBAL') {
 100                                         $elf_ext{$base}{$s} = 1;
 101                                 }
 102                                 else {
 103                                         print LOG "*** not GLOBAL\n";
 104                                 }
 105                         }
 106                         elsif ($2 eq 'ABS') {
 107                         }
 108                         elsif ($2 =~ /^\d+$/) {
 109                                 $elf_exp{$base}{$s} = 1;
 110                         }
 111                         else {
 112                                 print LOG "*** unknown type\n";
 113                         }
 114                 }
 115                 elsif (!/Num Buc:/) {
 116                         print LOG "*** strange line\n";
 117                 }
 118         }
 119
 120         close($f);
 121 }
 122
 123 sub fixDynDep
 124 {
 125         my ($user, $dep) = @_;
 126
 127         if (!defined $elf_dyn{$user}{$dep}) {
 128                 push(@{$elf_lib{$user}}, $dep);
 129                 $elf_dyn{$user}{$dep} = 1;
 130
 131                 print LOG "FixDynDep: $user = $dep\n";
 132         }
 133 }
 134
 135 sub fixDyn
 136 {
 137         my $s;
 138
 139         foreach (@elfs) {
 140                 if (/^libipt_.+\.so$/) {
 141                         fixDynDep("iptables", $_);
 142                 }
 143                 elsif (/^libip6t_.+\.so$/) {
 144                         fixDynDep("ip6tables", $_);
 145                 }
 146                 elsif (/^CP\d+\.so$/) {
 147                         fixDynDep("smbd", $_);
 148                 }
 149         }
 150
 151         fixDynDep("l2tpd", "cmd.so");
 152         fixDynDep("l2tpd", "sync-pppd.so");
 153         fixDynDep("pppd", "pppol2tp.so");
 154         fixDynDep("pppd", "pptp.so");
 155         fixDynDep("pppd", "rp-pppoe.so");
 156
 157         fixDynDep("libcrypto.so.1.0.0", "libssl.so.1.0.0");
 158
 159 #shibby
 160         fixDynDep("transmission-daemon", "libevent-2.0.so.5");
 161         fixDynDep("transmission-daemon", "libcurl.so.4.2.0");
 162 #       fixDynDep("transmission-daemon", "libiconv.so.2");
 163         fixDynDep("transmission-remote", "libevent-2.0.so.5");
 164         fixDynDep("transmission-remote", "libcurl.so.4.2.0");
 165 #       fixDynDep("transmission-remote", "libiconv.so.2");
 166         fixDynDep("radvd", "libdaemon.so.0.5.0");
 167         fixDynDep("miniupnpd", "libnfnetlink.so.0.2.0");
 168
 169         fixDynDep("tomatodata.cgi", "libc.so.0");
 170         fixDynDep("tomatoups.cgi", "libc.so.0");
 171         fixDynDep("apcupsd", "libc.so.0");
 172         fixDynDep("apcupsd", "libgcc_s.so.1");
 173         fixDynDep("apcaccess", "libc.so.0");
 174         fixDynDep("smtp", "libc.so.0");
 175
 176 #       fixDynDep("libbcm.so", "libshared.so");
 177 #       fixDynDep("libbcm.so", "libc.so.0");
 178
 179 #!!TB - Updated Broadcom WL driver
 180         fixDynDep("libbcmcrypto.so", "libc.so.0");
 181         fixDynDep("nas", "libbcmcrypto.so");
 182         fixDynDep("wl", "libbcmcrypto.so");
 183         fixDynDep("nas", "libc.so.0");
 184         fixDynDep("wl", "libc.so.0");
 185
 186 #Roadkill for NocatSplash
 187         fixDynDep("splashd","libglib-1.2.so.0.0.10");
 188 }
 189
 190 sub usersOf
 191 {
 192         my $name = shift;
 193         my $sym = shift;
 194         my @x;
 195         my $e;
 196         my $l;
 197
 198         @x = ();
 199         foreach $e (@elfs) {
 200                 foreach $l (@{$elf_lib{$e}}) {
 201                         if ($l eq $name) {
 202                                 if ((!defined $sym) || (defined $elf_ext{$e}{$sym})) {
 203                                         push(@x, $e);
 204                                 }
 205                                 last;
 206                         }
 207                 }
 208         }
 209         return @x;
 210 }
 211
 212 sub resolve
 213 {
 214         my $name = shift;
 215         my $sym = shift;
 216         my $l;
 217
 218         foreach $l (@{$elf_lib{$name}}) {
 219 #               print "\n$l $sym ", $elf_exp{$l}{$sym}, "\n";
 220                 return $l if (defined $elf_exp{$l}{$sym});
 221         }
 222         return "*** unresolved ***";
 223 }
 224
 225 sub fillGaps
 226 {
 227         my $name;
 228         my $sym;
 229         my @users;
 230         my $u;
 231         my $t;
 232         my $found;
 233
 234 #       print "Resolving implicit links...\n";
 235
 236         foreach $name (@elfs) {
 237                 foreach $sym (keys %{$elf_ext{$name}}) {
 238                         $found = 0;
 239
 240                         if ($sym eq '__uClibc_start_main') {
 241                                 $sym = '__uClibc_main';
 242                         }
 243
 244                         #  __gnu_local_gp is defined specially by the linker on MIPS
 245                         if ($sym eq '__gnu_local_gp') {
 246                                 $found = 1;
 247                         }
 248                         elsif (resolve($name, $sym) eq "*** unresolved ***") {
 249                                 @users = usersOf($name);
 250                                 foreach $u (@users) {
 251                                         # if exported by $u
 252                                         if (defined $elf_exp{$u}{$sym}) {
 253                                                 fixDynDep($name, $u);
 254                                                 $found = 1;
 255                                         }
 256                                         # if exported by shared libs of $u
 257                                         if (($t = resolve($u, $sym)) ne "*** unresolved ***") {
 258                                                 fixDynDep($name, $t);
 259                                                 $found = 1;
 260                                         }
 261                                 }
 262
 263                                 if ($found == 0) {
 264                                         print "Unable to resolve $sym used by $name\n", @users;
 265                                         exit 1;
 266                                 }
 267                         }
 268                 }
 269         }
 270 }
 271
 272 sub tab
 273 {
 274         my $current = shift;
 275         my $target = shift;
 276         my $s = "";
 277         my $n;
 278
 279         while (1) {
 280                 $n = $current + (4 - ($current % 4));
 281                 last if ($n > $target);
 282                 $s = $s . "\t";
 283                 $current = $n;
 284         }
 285         while ($current < $target) {
 286                 $s = $s . " ";
 287                 $current++;
 288         }
 289         return $s;
 290 }
 291
 292 sub genXref
 293 {
 294         my $f;
 295         my $fname;
 296         my $s;
 297         my @u;
 298
 299 #       print "Generating Xref Report...\n";
 300
 301         open($f, ">libfoo_xref.txt");
 302         foreach $fname (sort keys %elf_type) {
 303                 print $f "$fname:\n";
 304
 305                 if (scalar(@{$elf_lib{$fname}}) > 0) {
 306                         print $f "Dependency:\n";
 307                         foreach $s (sort @{$elf_lib{$fname}}) {
 308                                 print $f "\t$s", defined $elf_dyn{$fname}{$s} ? " (dyn)\n" : "\n";
 309                         }
 310                 }
 311
 312                 if (scalar(keys %{$elf_exp{$fname}}) > 0) {
 313                         print $f "Export:\n";
 314                         foreach $s (sort keys %{$elf_exp{$fname}}) {
 315                                 @u = usersOf($fname, $s);
 316                                 if (scalar(@u) > 0) {
 317                                         print $f "\t$s", tab(length($s) + 4, 40), " > ", join(",", @u), "\n";
 318                                 }
 319                                 else {
 320                                         print $f "\t$s\n";
 321                                 }
 322                         }
 323                 }
 324
 325                 if (scalar(keys %{$elf_ext{$fname}}) > 0) {
 326                         print $f "External:\n";
 327                         foreach $s (sort keys %{$elf_ext{$fname}}) {
 328                                 print $f "\t$s", tab(length($s) + 4, 40), " < ", resolve($fname, $s), "\n";
 329                         }
 330                 }
 331
 332                 print $f "\n";
 333         }
 334         close($f);
 335 }
 336
 337
 338 sub genSO
 339 {
 340         my ($so, $arc, $strip, $opt) = @_;
 341         my $name = basename($so);
 342         my $sym;
 343         my $fn;
 344         my $inuse;
 345         my @used;
 346         my @unused;
 347         my $cmd;
 348         my $before, $after;
 349
 350         if (!-f $so) {
 351                 print "$name: not found, skipping...\n";
 352                 return 0;
 353         }
 354
 355         #!!TB
 356         if (!-f $arc) {
 357                 print "$arc: not found, skipping...\n";
 358                 return 0;
 359         }
 360
 361         foreach $sym (sort keys %{$elf_exp{$name}}) {
 362                 if ((scalar(usersOf($name, $sym)) > 0) || (${strip} eq "no")) {
 363                         push(@used, $sym);
 364                 }
 365                 else {
 366                         push(@unused, $sym);
 367                 }
 368         }
 369
 370 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 371
 372         print LOG "\n\n${base}\n";
 373
 374 #       $cmd = "mipsel-uclibc-ld -shared -s -z combreloc --warn-common --fatal-warnings ${opt} -soname ${name} -o ${so}";
 375         $cmd = "mipsel-uclibc-gcc -shared -nostdlib -Wl,-s,-z,combreloc -Wl,--warn-common -Wl,--fatal-warnings -Wl,--gc-sections ${opt} -Wl,-soname=${name} -o ${so}";
 376         foreach (@{$elf_lib{$name}}) {
 377                 if ((!$elf_dyn{$name}{$_}) && (/^lib(.+)\.so/)) {
 378                         $cmd .= " -l$1";
 379                 }
 380                 else {
 381 #                       print LOG "Not marking for linkage: $_\n";
 382                 }
 383         }
 384 #       print "$cmd -u... ${arc}\n";
 385         if (scalar(@used) == 0) {
 386                 print "$name: WARNING: Library is not used by anything, deleting...\n";
 387                 unlink $so;
 388 #               <>;
 389                 return 0;
 390         }
 391         $cmd .= " -u " . join(" -u ", @used) . " ". $arc;
 392
 393         print LOG "Command: $cmd\n";
 394         print LOG "Used: ", join(",", @used), "\n";
 395         print LOG "Unused: ", join(",", @unused), "\n";
 396
 397         $before = -s $so;
 398
 399         system($cmd);
 400         if ($? != 0) {
 401                 error("ld returned $?");
 402         }
 403
 404         $after = -s $so;
 405
 406         print "$name: Attempted to remove ", scalar(@unused), "/", scalar(@unused) + scalar(@used), " symbols. ";
 407         printf "%.2fK - %.2fK = %.2fK\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 408
 409 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 410 #       printf "Before: %.2fK / After: %.2fK / Removed: %.2fK\n\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 411
 412         return ($before > $after)
 413 }
 414
 415
 416 ##
 417 ##
 418 ##
 419
 420 #       print "\nlibfoo.pl - fooify shared libraries\n";
 421 #       print "Copyright (C) 2006-2007 Jonathan Zarate\n\n";
 422
 423 if ((!-d $root) || (!-d $uclibc) || (!-d $router)) {
 424         print "Missing or invalid environment variables\n";
 425         exit(1);
 426 }
 427
 428 open(LOG, ">libfoo.debug");
 429 #open(LOG, ">/dev/null");
 430
 431 print "Loading...\r";
 432 load($root);
 433 print "Finished loading files.", " " x 30, "\r";
 434
 435 fixDyn();
 436 fillGaps();
 437
 438 genXref();
 439
 440 $stripshared = "yes";
 441 if ($ARGV[0] eq "--noopt") {
 442         $stripshared = "no";
 443 }
 444
 445 genSO("${root}/lib/libc.so.0", "${uclibc}/lib/libc.a", "", "-Wl,-init=__uClibc_init ${uclibc}/lib/optinfo/interp.os");
 446 genSO("${root}/lib/libresolv.so.0", "${uclibc}/lib/libresolv.a", "${stripshared}");
 447 genSO("${root}/lib/libcrypt.so.0", "${uclibc}/lib/libcrypt.a", "${stripshared}");
 448 genSO("${root}/lib/libm.so.0", "${uclibc}/lib/libm.a");
 449 genSO("${root}/lib/libpthread.so.0", "${uclibc}/lib/libpthread.a", "${stripshared}", "-u pthread_mutexattr_init -Wl,-init=__pthread_initialize_minimal_internal");
 450 genSO("${root}/lib/libutil.so.0", "${uclibc}/lib/libutil.a", "${stripshared}");
 451 #  genSO("${root}/lib/libdl.so.0", "${uclibc}/lib/libdl.a", "${stripshared}");
 452 #  genSO("${root}/lib/libnsl.so.0", "${uclibc}/lib/libnsl.a", "${stripshared}");
 453
 454 genSO("${root}/usr/lib/libcrypto.so.1.0.0", "${router}/openssl/libcrypto.a");
 455 genSO("${root}/usr/lib/libssl.so.1.0.0", "${router}/openssl/libssl.a", "${stripshared}", "-L${router}/openssl");
 456
 457 genSO("${root}/usr/lib/libzebra.so", "${router}/zebra/lib/libzebra.a");
 458 genSO("${root}/usr/lib/libz.so.1", "${router}/zlib/libz.a");
 459 genSO("${root}/usr/lib/libjpeg.so", "${router}/jpeg/libjpeg.a");
 460 genSO("${root}/usr/lib/libsqlite3.so.0", "${router}/sqlite/.libs/libsqlite3.a");
 461 genSO("${root}/usr/lib/libogg.so.0", "${router}/libogg/src/.libs/libogg.a");
 462 genSO("${root}/usr/lib/libvorbis.so.0", "${router}/libvorbis/lib/.libs/libvorbis.a", "", "-L${router}/libogg/src/.libs");
 463 genSO("${root}/usr/lib/libid3tag.so.0", "${router}/libid3tag/.libs/libid3tag.a", "", "-L${router}/zlib");
 464 genSO("${root}/usr/lib/libexif.so.12", "${router}/libexif/libexif/.libs/libexif.a");
 465 genSO("${root}/usr/lib/libFLAC.so.8", "${router}/flac/src/libFLAC/.libs/libFLAC.a", "", "-L${router}/libogg/src/.libs");
 466 genSO("${root}/usr/lib/libavcodec.so.52", "${router}/ffmpeg/libavcodec/libavcodec.a", "", "-L${router}/ffmpeg/libavutil");
 467 genSO("${root}/usr/lib/libavutil.so.50", "${router}/ffmpeg/libavutil/libavutil.a");
 468 genSO("${root}/usr/lib/libavformat.so.52", "${router}/ffmpeg/libavformat/libavformat.a", "", "-L${router}/ffmpeg/libavutil -L${router}/ffmpeg/libavcodec");
 469 genSO("${root}/usr/lib/libsmb.so", "${router}/samba/source/bin/libsmb.a");
 470 genSO("${root}/usr/lib/libbigballofmud.so", "${router}/samba3/source/bin/libbigballofmud.a");
 471
 472 genSO("${root}/usr/lib/liblzo2.so.2", "${router}/lzo/src/.libs/liblzo2.a");
 473 #       genSO("${root}/usr/lib/libtamba.so", "${router}/samba3/source/bin/libtamba.a");
 474 #       genSO("${root}/usr/lib/libiptc.so", "${router}/iptables/libiptc/libiptc.a");
 475 #       genSO("${root}/usr/lib/libshared.so", "${router}/shared/libshared.a");
 476 #       genSO("${root}/usr/lib/libnvram.so", "${router}/nvram/libnvram.a");
 477 #       genSO("${root}/usr/lib/libusb-1.0.so.0", "${router}/libusb10/libusb/.libs/libusb-1.0.a");
 478 #       genSO("${root}/usr/lib/libusb-0.1.so.4", "${router}/libusb/libusb/.libs/libusb.a", "", "-L${router}/libusb10/libusb/.libs");
 479
 480 genSO("${root}/usr/lib/libbcmcrypto.so", "${router}/libbcmcrypto/libbcmcrypto.a");
 481
 482 #shibby
 483 genSO("${root}/usr/lib/libcurl.so.4.2.0", "${router}/libcurl/lib/.libs/libcurl.a", "", "-L${router}/zlib");
 484 genSO("${root}/usr/lib/libevent-2.0.so.5", "${router}/libevent/.libs/libevent.a");
 485 genSO("${root}/usr/lib/libdaemon.so.0.5.0", "${router}/libdaemon/libdaemon/.libs/libdaemon.a");
 486 #genSO("${root}/usr/lib/libiconv.so.2", "${router}/libiconv/lib/.libs/libiconv.a");
 487 genSO("${root}/usr/lib/libnfnetlink.so.0.2.0", "${router}/libnfnetlink/src/.libs/libnfnetlink.a");
 488
 489 print "\n";
 490
 491 close(LOG);
 492 exit(0);