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-1.4.so.2.2.0");
 161         fixDynDep("transmission-daemon", "libcurl.so.4.2.0");
 162         fixDynDep("transmission-remote", "libevent-1.4.so.2.2.0");
 163         fixDynDep("transmission-remote", "libcurl.so.4.2.0");
 164
 165 #       fixDynDep("libbcm.so", "libshared.so");
 166 #       fixDynDep("libbcm.so", "libc.so.0");
 167
 168 #!!TB - Updated Broadcom WL driver
 169         fixDynDep("libbcmcrypto.so", "libc.so.0");
 170         fixDynDep("nas", "libbcmcrypto.so");
 171         fixDynDep("wl", "libbcmcrypto.so");
 172         fixDynDep("nas", "libc.so.0");
 173         fixDynDep("wl", "libc.so.0");
 174 }
 175
 176 sub usersOf
 177 {
 178         my $name = shift;
 179         my $sym = shift;
 180         my @x;
 181         my $e;
 182         my $l;
 183
 184         @x = ();
 185         foreach $e (@elfs) {
 186                 foreach $l (@{$elf_lib{$e}}) {
 187                         if ($l eq $name) {
 188                                 if ((!defined $sym) || (defined $elf_ext{$e}{$sym})) {
 189                                         push(@x, $e);
 190                                 }
 191                                 last;
 192                         }
 193                 }
 194         }
 195         return @x;
 196 }
 197
 198 sub resolve
 199 {
 200         my $name = shift;
 201         my $sym = shift;
 202         my $l;
 203
 204         foreach $l (@{$elf_lib{$name}}) {
 205 #               print "\n$l $sym ", $elf_exp{$l}{$sym}, "\n";
 206                 return $l if (defined $elf_exp{$l}{$sym});
 207         }
 208         return "*** unresolved ***";
 209 }
 210
 211 sub fillGaps
 212 {
 213         my $name;
 214         my $sym;
 215         my @users;
 216         my $u;
 217         my $t;
 218         my $found;
 219
 220 #       print "Resolving implicit links...\n";
 221
 222         foreach $name (@elfs) {
 223                 foreach $sym (keys %{$elf_ext{$name}}) {
 224                         $found = 0;
 225
 226                         if ($sym eq '__uClibc_start_main') {
 227                                 $sym = '__uClibc_main';
 228                         }
 229
 230                         #  __gnu_local_gp is defined specially by the linker on MIPS
 231                         if ($sym eq '__gnu_local_gp') {
 232                                 $found = 1;
 233                         }
 234                         elsif (resolve($name, $sym) eq "*** unresolved ***") {
 235                                 @users = usersOf($name);
 236                                 foreach $u (@users) {
 237                                         # if exported by $u
 238                                         if (defined $elf_exp{$u}{$sym}) {
 239                                                 fixDynDep($name, $u);
 240                                                 $found = 1;
 241                                         }
 242                                         # if exported by shared libs of $u
 243                                         if (($t = resolve($u, $sym)) ne "*** unresolved ***") {
 244                                                 fixDynDep($name, $t);
 245                                                 $found = 1;
 246                                         }
 247                                 }
 248
 249                                 if ($found == 0) {
 250                                         print "Unable to resolve $sym used by $name\n", @users;
 251                                         exit 1;
 252                                 }
 253                         }
 254                 }
 255         }
 256 }
 257
 258 sub tab
 259 {
 260         my $current = shift;
 261         my $target = shift;
 262         my $s = "";
 263         my $n;
 264
 265         while (1) {
 266                 $n = $current + (4 - ($current % 4));
 267                 last if ($n > $target);
 268                 $s = $s . "\t";
 269                 $current = $n;
 270         }
 271         while ($current < $target) {
 272                 $s = $s . " ";
 273                 $current++;
 274         }
 275         return $s;
 276 }
 277
 278 sub genXref
 279 {
 280         my $f;
 281         my $fname;
 282         my $s;
 283         my @u;
 284
 285 #       print "Generating Xref Report...\n";
 286
 287         open($f, ">libfoo_xref.txt");
 288         foreach $fname (sort keys %elf_type) {
 289                 print $f "$fname:\n";
 290
 291                 if (scalar(@{$elf_lib{$fname}}) > 0) {
 292                         print $f "Dependency:\n";
 293                         foreach $s (sort @{$elf_lib{$fname}}) {
 294                                 print $f "\t$s", defined $elf_dyn{$fname}{$s} ? " (dyn)\n" : "\n";
 295                         }
 296                 }
 297
 298                 if (scalar(keys %{$elf_exp{$fname}}) > 0) {
 299                         print $f "Export:\n";
 300                         foreach $s (sort keys %{$elf_exp{$fname}}) {
 301                                 @u = usersOf($fname, $s);
 302                                 if (scalar(@u) > 0) {
 303                                         print $f "\t$s", tab(length($s) + 4, 40), " > ", join(",", @u), "\n";
 304                                 }
 305                                 else {
 306                                         print $f "\t$s\n";
 307                                 }
 308                         }
 309                 }
 310
 311                 if (scalar(keys %{$elf_ext{$fname}}) > 0) {
 312                         print $f "External:\n";
 313                         foreach $s (sort keys %{$elf_ext{$fname}}) {
 314                                 print $f "\t$s", tab(length($s) + 4, 40), " < ", resolve($fname, $s), "\n";
 315                         }
 316                 }
 317
 318                 print $f "\n";
 319         }
 320         close($f);
 321 }
 322
 323
 324 sub genSO
 325 {
 326         my ($so, $arc, $strip, $opt) = @_;
 327         my $name = basename($so);
 328         my $sym;
 329         my $fn;
 330         my $inuse;
 331         my @used;
 332         my @unused;
 333         my $cmd;
 334         my $before, $after;
 335
 336         if (!-f $so) {
 337                 print "$name: not found, skipping...\n";
 338                 return 0;
 339         }
 340
 341         #!!TB
 342         if (!-f $arc) {
 343                 print "$arc: not found, skipping...\n";
 344                 return 0;
 345         }
 346
 347         foreach $sym (sort keys %{$elf_exp{$name}}) {
 348                 if ((scalar(usersOf($name, $sym)) > 0) || (${strip} eq "no")) {
 349                         push(@used, $sym);
 350                 }
 351                 else {
 352                         push(@unused, $sym);
 353                 }
 354         }
 355
 356 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 357
 358         print LOG "\n\n${base}\n";
 359
 360 #       $cmd = "mipsel-uclibc-ld -shared -s -z combreloc --warn-common --fatal-warnings ${opt} -soname ${name} -o ${so}";
 361         $cmd = "mipsel-uclibc-gcc -shared -nostdlib -Wl,-s,-z,combreloc -Wl,--warn-common -Wl,--fatal-warnings -Wl,--gc-sections ${opt} -Wl,-soname=${name} -o ${so}";
 362         foreach (@{$elf_lib{$name}}) {
 363                 if ((!$elf_dyn{$name}{$_}) && (/^lib(.+)\.so/)) {
 364                         $cmd .= " -l$1";
 365                 }
 366                 else {
 367 #                       print LOG "Not marking for linkage: $_\n";
 368                 }
 369         }
 370 #       print "$cmd -u... ${arc}\n";
 371         if (scalar(@used) == 0) {
 372                 print "$name: WARNING: Library is not used by anything, deleting...\n";
 373                 unlink $so;
 374 #               <>;
 375                 return 0;
 376         }
 377         $cmd .= " -u " . join(" -u ", @used) . " ". $arc;
 378
 379         print LOG "Command: $cmd\n";
 380         print LOG "Used: ", join(",", @used), "\n";
 381         print LOG "Unused: ", join(",", @unused), "\n";
 382
 383         $before = -s $so;
 384
 385         system($cmd);
 386         if ($? != 0) {
 387                 error("ld returned $?");
 388         }
 389
 390         $after = -s $so;
 391
 392         print "$name: Attempted to remove ", scalar(@unused), "/", scalar(@unused) + scalar(@used), " symbols. ";
 393         printf "%.2fK - %.2fK = %.2fK\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 394
 395 #       print "\n$name: Attempting to link ", scalar(@used), " and remove ", scalar(@unused), " objects...\n";
 396 #       printf "Before: %.2fK / After: %.2fK / Removed: %.2fK\n\n", $before / 1024, $after / 1024, ($before - $after) / 1024;
 397
 398         return ($before > $after)
 399 }
 400
 401
 402 ##
 403 ##
 404 ##
 405
 406 #       print "\nlibfoo.pl - fooify shared libraries\n";
 407 #       print "Copyright (C) 2006-2007 Jonathan Zarate\n\n";
 408
 409 if ((!-d $root) || (!-d $uclibc) || (!-d $router)) {
 410         print "Missing or invalid environment variables\n";
 411         exit(1);
 412 }
 413
 414 #open(LOG, ">libfoo.debug");
 415 open(LOG, ">/dev/null");
 416
 417 print "Loading...\r";
 418 load($root);
 419 print "Finished loading files.", " " x 30, "\r";
 420
 421 fixDyn();
 422 fillGaps();
 423
 424 genXref();
 425
 426 $stripshared = "yes";
 427 if ($ARGV[0] eq "--noopt") {
 428         $stripshared = "no";
 429 }
 430
 431 genSO("${root}/lib/libc.so.0", "${uclibc}/lib/libc.a", "${stripshared}", "-Wl,-init=__uClibc_init ${uclibc}/lib/optinfo/interp.os");
 432 genSO("${root}/lib/libresolv.so.0", "${uclibc}/lib/libresolv.a", "${stripshared}");
 433 genSO("${root}/lib/libcrypt.so.0", "${uclibc}/lib/libcrypt.a", "${stripshared}");
 434 genSO("${root}/lib/libm.so.0", "${uclibc}/lib/libm.a", "${stripshared}");
 435 genSO("${root}/lib/libpthread.so.0", "${uclibc}/lib/libpthread.a", "${stripshared}", "-u pthread_mutexattr_init -Wl,-init=__pthread_initialize_minimal_internal");
 436 genSO("${root}/lib/libutil.so.0", "${uclibc}/lib/libutil.a", "${stripshared}");
 437 #  genSO("${root}/lib/libdl.so.0", "${uclibc}/lib/libdl.a", "${stripshared}");
 438 #  genSO("${root}/lib/libnsl.so.0", "${uclibc}/lib/libnsl.a", "${stripshared}");
 439
 440 genSO("${root}/usr/lib/libcrypto.so.1.0.0", "${router}/openssl/libcrypto.a");
 441 genSO("${root}/usr/lib/libssl.so.1.0.0", "${router}/openssl/libssl.a", "", "-L${router}/openssl");
 442
 443 genSO("${root}/usr/lib/libzebra.so", "${router}/zebra/lib/libzebra.a");
 444 genSO("${root}/usr/lib/libz.so.1", "${router}/zlib/libz.a");
 445 genSO("${root}/usr/lib/libjpeg.so", "${router}/jpeg/libjpeg.a");
 446 genSO("${root}/usr/lib/libsqlite3.so.0", "${router}/sqlite/.libs/libsqlite3.a");
 447 genSO("${root}/usr/lib/libogg.so.0", "${router}/libogg/src/.libs/libogg.a");
 448 genSO("${root}/usr/lib/libvorbis.so.0", "${router}/libvorbis/lib/.libs/libvorbis.a", "", "-L${router}/libogg/src/.libs");
 449 genSO("${root}/usr/lib/libid3tag.so.0", "${router}/libid3tag/.libs/libid3tag.a", "", "-L${router}/zlib");
 450 genSO("${root}/usr/lib/libexif.so.12", "${router}/libexif/libexif/.libs/libexif.a");
 451 genSO("${root}/usr/lib/libFLAC.so.8", "${router}/flac/src/libFLAC/.libs/libFLAC.a", "", "-L${router}/libogg/src/.libs");
 452 genSO("${root}/usr/lib/libavcodec.so.52", "${router}/ffmpeg/libavcodec/libavcodec.a", "", "-L${router}/ffmpeg/libavutil");
 453 genSO("${root}/usr/lib/libavutil.so.50", "${router}/ffmpeg/libavutil/libavutil.a");
 454 genSO("${root}/usr/lib/libavformat.so.52", "${router}/ffmpeg/libavformat/libavformat.a", "", "-L${router}/ffmpeg/libavutil -L${router}/ffmpeg/libavcodec");
 455 genSO("${root}/usr/lib/libsmb.so", "${router}/samba/source/bin/libsmb.a");
 456 genSO("${root}/usr/lib/libbigballofmud.so", "${router}/samba3/source/bin/libbigballofmud.a");
 457
 458 genSO("${root}/usr/lib/liblzo2.so.2", "${router}/lzo/src/.libs/liblzo2.a");
 459 #       genSO("${root}/usr/lib/libtamba.so", "${router}/samba3/source/bin/libtamba.a");
 460 #       genSO("${root}/usr/lib/libiptc.so", "${router}/iptables/libiptc/libiptc.a");
 461 #       genSO("${root}/usr/lib/libshared.so", "${router}/shared/libshared.a");
 462 #       genSO("${root}/usr/lib/libnvram.so", "${router}/nvram/libnvram.a");
 463 #       genSO("${root}/usr/lib/libusb-1.0.so.0", "${router}/libusb10/libusb/.libs/libusb-1.0.a");
 464 #       genSO("${root}/usr/lib/libusb-0.1.so.4", "${router}/libusb/libusb/.libs/libusb.a", "", "-L${router}/libusb10/libusb/.libs");
 465
 466 genSO("${root}/usr/lib/libbcmcrypto.so", "${router}/libbcmcrypto/libbcmcrypto.a");
 467
 468 #shibby
 469 genSO("${root}/usr/lib/libcurl.so.4.2.0", "${router}/libcurl/lib/.libs/libcurl.a", "", "-L${router}/zlib");
 470 genSO("${root}/usr/lib/libevent-1.4.so.2.2.0", "${router}/libevent/.libs/libevent.a");
 471
 472 print "\n";
 473
 474 close(LOG);
 475 exit(0);