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 #shibby
 159         fixDynDep("miniupnpd", "libnfnetlink.so.0.2.0");
 160
 161 #       fixDynDep("libbcm.so", "libshared.so");
 162 #       fixDynDep("libbcm.so", "libc.so.0");
 163
 164 #!!TB - Updated Broadcom WL driver
 165         fixDynDep("libbcmcrypto.so", "libc.so.0");
 166         fixDynDep("nas", "libbcmcrypto.so");
 167         fixDynDep("wl", "libbcmcrypto.so");
 168         fixDynDep("nas", "libc.so.0");
 169         fixDynDep("wl", "libc.so.0");
 170 #Roadkill for NocatSplash
 171         fixDynDep("splashd","libglib-1.2.so.0.0.10");
 172 #Roadkill for php
 173         fixDynDep("php-cli","libz.so.1.2.5");
 174         fixDynDep("php-cgi","libz.so.1.2.5");
 175 }
 176
 177 sub usersOf
 178 {
 179         my $name = shift;
 180         my $sym = shift;
 181         my @x;
 182         my $e;
 183         my $l;
 184
 185         @x = ();
 186         foreach $e (@elfs) {
 187                 foreach $l (@{$elf_lib{$e}}) {
 188                         if ($l eq $name) {
 189                                 if ((!defined $sym) || (defined $elf_ext{$e}{$sym})) {
 190                                         push(@x, $e);
 191                                 }
 192                                 last;
 193                         }
 194                 }
 195         }
 196         return @x;
 197 }
 198
 199 sub resolve
 200 {
 201         my $name = shift;
 202         my $sym = shift;
 203         my $l;
 204
 205         foreach $l (@{$elf_lib{$name}}) {
 206 #               print "\n$l $sym ", $elf_exp{$l}{$sym}, "\n";
 207                 return $l if (defined $elf_exp{$l}{$sym});
 208         }
 209         return "*** unresolved ***";
 210 }
 211
 212 sub fillGaps
 213 {
 214         my $name;
 215         my $sym;
 216         my @users;
 217         my $u;
 218         my $t;
 219         my $found;
 220
 221 #       print "Resolving implicit links...\n";
 222
 223         foreach $name (@elfs) {
 224                 foreach $sym (keys %{$elf_ext{$name}}) {
 225                         $found = 0;
 226
 227                         if ($sym eq '__uClibc_start_main') {
 228                                 $sym = '__uClibc_main';
 229                         }
 230
 231                         #  __gnu_local_gp is defined specially by the linker on MIPS
 232                         if ($sym eq '__gnu_local_gp') {
 233                                 $found = 1;
 234                         }
 235                         elsif (resolve($name, $sym) eq "*** unresolved ***") {
 236                                 @users = usersOf($name);
 237                                 foreach $u (@users) {
 238                                         # if exported by $u
 239                                         if (defined $elf_exp{$u}{$sym}) {
 240                                                 fixDynDep($name, $u);
 241                                                 $found = 1;
 242                                         }
 243                                         # if exported by shared libs of $u
 244                                         if (($t = resolve($u, $sym)) ne "*** unresolved ***") {
 245                                                 fixDynDep($name, $t);
 246                                                 $found = 1;
 247                                         }
 248                                 }
 249
 250                                 if ($found == 0) {
 251                                         print "Unable to resolve $sym used by $name\n", @users;
 252                                         exit 1;
 253                                 }
 254                         }
 255                 }
 256         }
 257 }
 258
 259 sub tab
 260 {
 261         my $current = shift;
 262         my $target = shift;
 263         my $s = "";
 264         my $n;
 265
 266         while (1) {
 267                 $n = $current + (4 - ($current % 4));
 268                 last if ($n > $target);
 269                 $s = $s . "\t";
 270                 $current = $n;
 271         }
 272         while ($current < $target) {
 273                 $s = $s . " ";
 274                 $current++;
 275         }
 276         return $s;
 277 }
 278
 279 sub genXref
 280 {
 281         my $f;
 282         my $fname;
 283         my $s;
 284         my @u;
 285
 286 #       print "Generating Xref Report...\n";
 287
 288         open($f, ">libfoo_xref.txt");
 289         foreach $fname (sort keys %elf_type) {
 290                 print $f "$fname:\n";
 291
 292                 if (scalar(@{$elf_lib{$fname}}) > 0) {
 293                         print $f "Dependency:\n";
 294                         foreach $s (sort @{$elf_lib{$fname}}) {
 295                                 print $f "\t$s", defined $elf_dyn{$fname}{$s} ? " (dyn)\n" : "\n";
 296                         }
 297                 }
 298
 299                 if (scalar(keys %{$elf_exp{$fname}}) > 0) {
 300                         print $f "Export:\n";
 301                         foreach $s (sort keys %{$elf_exp{$fname}}) {
 302                                 @u = usersOf($fname, $s);
 303                                 if (scalar(@u) > 0) {
 304                                         print $f "\t$s", tab(length($s) + 4, 40), " > ", join(",", @u), "\n";
 305                                 }
 306                                 else {
 307                                         print $f "\t$s\n";
 308                                 }
 309                         }
 310                 }
 311
 312                 if (scalar(keys %{$elf_ext{$fname}}) > 0) {
 313                         print $f "External:\n";
 314                         foreach $s (sort keys %{$elf_ext{$fname}}) {
 315                                 print $f "\t$s", tab(length($s) + 4, 40), " < ", resolve($fname, $s), "\n";
 316                         }
 317                 }
 318
 319                 print $f "\n";
 320         }
 321         close($f);
 322 }
 323
 324
 325 sub genSO
 326 {
 327         my ($so, $arc, $strip, $opt) = @_;
 328         my $name = basename($so);
 329         my $sym;
 330         my $fn;
 331         my $inuse;
 332         my @used;
 333         my @unused;
 334         my $cmd;
 335         my $before, $after;
 336
 337         if (!-f $so) {
 338                 print "$name: not found, skipping...\n";
 339                 return 0;
 340         }
 341
 342         #!!TB
 343         if (!-f $arc) {
 344                 print "$arc: not found, skipping...\n";
 345                 return 0;
 346         }
 347
 348         foreach $sym (sort keys %{$elf_exp{$name}}) {
 349                 if ((scalar(usersOf($name, $sym)) > 0) || (${strip} eq "no")) {
 350                         push(@used, $sym);
 351                 }
 352                 else {
 353                         push(@unused, $sym);
 354                 }
 355         }
 356
 357 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 358
 359         print LOG "\n\n${base}\n";
 360
 361 #       $cmd = "mipsel-uclibc-ld -shared -s -z combreloc --warn-common --fatal-warnings ${opt} -soname ${name} -o ${so}";
 362         $cmd = "mipsel-uclibc-gcc -shared -nostdlib -Wl,-s,-z,combreloc -Wl,--warn-common -Wl,--fatal-warnings -Wl,--gc-sections ${opt} -Wl,-soname=${name} -o ${so}";
 363         foreach (@{$elf_lib{$name}}) {
 364                 if ((!$elf_dyn{$name}{$_}) && (/^lib(.+)\.so/)) {
 365                         $cmd .= " -l$1";
 366                 }
 367                 else {
 368 #                       print LOG "Not marking for linkage: $_\n";
 369                 }
 370         }
 371 #       print "$cmd -u... ${arc}\n";
 372         if (scalar(@used) == 0) {
 373                 print "$name: WARNING: Library is not used by anything, deleting...\n";
 374                 unlink $so;
 375 #               <>;
 376                 return 0;
 377         }
 378         $cmd .= " -u " . join(" -u ", @used) . " ". $arc;
 379
 380         print LOG "Command: $cmd\n";
 381         print LOG "Used: ", join(",", @used), "\n";
 382         print LOG "Unused: ", join(",", @unused), "\n";
 383
 384         $before = -s $so;
 385
 386         system($cmd);
 387         if ($? != 0) {
 388                 error("ld returned $?");
 389         }
 390
 391         $after = -s $so;
 392
 393         print "$name: Attempted to remove ", scalar(@unused), "/", scalar(@unused) + scalar(@used), " symbols. ";
 394         printf "%.2fK - %.2fK = %.2fK\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 395
 396 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 397 #       printf "Before: %.2fK / After: %.2fK / Removed: %.2fK\n\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 398
 399         return ($before > $after)
 400 }
 401
 402
 403 ##
 404 ##
 405 ##
 406
 407 #       print "\nlibfoo.pl - fooify shared libraries\n";
 408 #       print "Copyright (C) 2006-2007 Jonathan Zarate\n\n";
 409
 410 if ((!-d $root) || (!-d $uclibc) || (!-d $router)) {
 411         print "Missing or invalid environment variables\n";
 412         exit(1);
 413 }
 414
 415 open(LOG, ">libfoo.debug");
 416 #open(LOG, ">/dev/null");
 417
 418 print "Loading...\r";
 419 load($root);
 420 print "Finished loading files.", " " x 30, "\r";
 421
 422 fixDyn();
 423 fillGaps();
 424
 425 genXref();
 426
 427 $stripshared = "yes";
 428 if ($ARGV[0] eq "--noopt") {
 429         $stripshared = "no";
 430 }
 431
 432 genSO("${root}/lib/libc.so.0", "${uclibc}/lib/libc.a", "", "-Wl,-init=__uClibc_init ${uclibc}/lib/optinfo/interp.os");
 433 genSO("${root}/lib/libresolv.so.0", "${uclibc}/lib/libresolv.a", "${stripshared}");
 434 genSO("${root}/lib/libcrypt.so.0", "${uclibc}/lib/libcrypt.a", "${stripshared}");
 435 genSO("${root}/lib/libm.so.0", "${uclibc}/lib/libm.a");
 436 genSO("${root}/lib/libpthread.so.0", "${uclibc}/lib/libpthread.a", "${stripshared}", "-u pthread_mutexattr_init -Wl,-init=__pthread_initialize_minimal_internal");
 437 genSO("${root}/lib/libutil.so.0", "${uclibc}/lib/libutil.a", "${stripshared}");
 438 #  genSO("${root}/lib/libdl.so.0", "${uclibc}/lib/libdl.a", "${stripshared}");
 439 #  genSO("${root}/lib/libnsl.so.0", "${uclibc}/lib/libnsl.a", "${stripshared}");
 440
 441 genSO("${root}/usr/lib/libcrypto.so.1.0.0", "${router}/openssl/libcrypto.a");
 442 genSO("${root}/usr/lib/libssl.so.1.0.0", "${router}/openssl/libssl.a", "${stripshared}", "-L${router}/openssl");
 443
 444 genSO("${root}/usr/lib/libzebra.so", "${router}/zebra/lib/libzebra.a");
 445 genSO("${root}/usr/lib/libz.so.1", "${router}/zlib/libz.a");
 446 genSO("${root}/usr/lib/libjpeg.so", "${router}/jpeg/libjpeg.a");
 447 genSO("${root}/usr/lib/libsqlite3.so.0", "${router}/sqlite/.libs/libsqlite3.a");
 448 genSO("${root}/usr/lib/libogg.so.0", "${router}/libogg/src/.libs/libogg.a");
 449 genSO("${root}/usr/lib/libvorbis.so.0", "${router}/libvorbis/lib/.libs/libvorbis.a", "", "-L${router}/libogg/src/.libs");
 450 genSO("${root}/usr/lib/libid3tag.so.0", "${router}/libid3tag/.libs/libid3tag.a", "", "-L${router}/zlib");
 451 genSO("${root}/usr/lib/libexif.so.12", "${router}/libexif/libexif/.libs/libexif.a");
 452 genSO("${root}/usr/lib/libFLAC.so.8", "${router}/flac/src/libFLAC/.libs/libFLAC.a", "", "-L${router}/libogg/src/.libs");
 453 genSO("${root}/usr/lib/libavcodec.so.52", "${router}/ffmpeg/libavcodec/libavcodec.a", "", "-L${router}/ffmpeg/libavutil");
 454 genSO("${root}/usr/lib/libavutil.so.50", "${router}/ffmpeg/libavutil/libavutil.a");
 455 genSO("${root}/usr/lib/libavformat.so.52", "${router}/ffmpeg/libavformat/libavformat.a", "", "-L${router}/ffmpeg/libavutil -L${router}/ffmpeg/libavcodec");
 456 genSO("${root}/usr/lib/libsmb.so", "${router}/samba/source/bin/libsmb.a");
 457 genSO("${root}/usr/lib/libbigballofmud.so", "${router}/samba3/source/bin/libbigballofmud.a");
 458
 459 genSO("${root}/usr/lib/liblzo2.so.2", "${router}/lzo/src/.libs/liblzo2.a");
 460 #       genSO("${root}/usr/lib/libtamba.so", "${router}/samba3/source/bin/libtamba.a");
 461 #       genSO("${root}/usr/lib/libiptc.so", "${router}/iptables/libiptc/libiptc.a");
 462 #       genSO("${root}/usr/lib/libshared.so", "${router}/shared/libshared.a");
 463 #       genSO("${root}/usr/lib/libnvram.so", "${router}/nvram/libnvram.a");
 464 #       genSO("${root}/usr/lib/libusb-1.0.so.0", "${router}/libusb10/libusb/.libs/libusb-1.0.a");
 465 #       genSO("${root}/usr/lib/libusb-0.1.so.4", "${router}/libusb/libusb/.libs/libusb.a", "", "-L${router}/libusb10/libusb/.libs");
 466
 467 genSO("${root}/usr/lib/libbcmcrypto.so", "${router}/libbcmcrypto/libbcmcrypto.a");
 468 genSO("${root}/usr/lib/libnfnetlink.so.0.2.0", "${router}/libnfnetlink/src/.libs/libnfnetlink.a");
 469
 470 print "\n";
 471
 472 close(LOG);
 473 exit(0);