1#!/usr/perl5/bin/perl -w 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22 23# 24# Copyright 2009 Sun Microsystems, Inc. All rights reserved. 25# Use is subject to license terms. 26# 27# 28 29# 30# Check ELF information. 31# 32# This script descends a directory hierarchy inspecting ELF dynamic executables 33# and shared objects. The general theme is to verify that common Makefile rules 34# have been used to build these objects. Typical failures occur when Makefile 35# rules are re-invented rather than being inherited from "cmd/lib" Makefiles. 36# 37# As always, a number of components don't follow the rules, and these are 38# excluded to reduce this scripts output. Pathnames used for this exclusion 39# assume this script is being run over a "proto" area. The -a (all) option 40# skips any exclusions. 41# 42# By default any file that has conditions that should be reported is first 43# listed and then each condition follows. The -o (one-line) option produces a 44# more terse output which is better for sorting/diffing with "nightly". 45# 46# NOTE: missing dependencies, symbols or versions are reported by running the 47# file through ldd(1). As objects within a proto area are built to exist in a 48# base system, standard use of ldd(1) will bind any objects to dependencies 49# that exist in the base system. It is frequently the case that newer objects 50# exist in the proto area that are required to satisfy other objects 51# dependencies, and without using these newer objects an ldd(1) will produce 52# misleading error messages. To compensate for this, the -d option (or the 53# existence of the CODEMSG_WS/ROOT environment variables) cause the creation of 54# alternative dependency mappings via crle(1) configuration files that establish 55# any proto shared objects as alternatives to their base system location. Thus 56# ldd(1) can be executed against these configuration files so that objects in a 57# proto area bind to their dependencies in the same proto area. 58 59 60# Define all global variables (required for strict) 61use vars qw($SkipDirs $SkipFiles $SkipTextrelFiles $SkipDirectBindFiles); 62use vars qw($SkipUndefFiles $SkipUnusedDeps); 63use vars qw($SkipStabFiles $SkipNoExStkFiles $SkipCrleConf); 64use vars qw($SkipUnusedSearchPath $SkipUnrefObject $SkipUnusedObject); 65use vars qw($Prog $Mach $Isalist $Env $Ena64 $Tmpdir $Error $Gnuc); 66use vars qw($UnusedPaths $LddNoU $Crle32 $Crle64 $Conf32 $Conf64); 67use vars qw($SkipDirectBindDirs $SkipInterps $SkipSymSort $OldDeps %opt); 68 69use strict; 70 71 72# Define any directories we should skip completely. 73$SkipDirs = qr{ 74 usr/lib/devfsadm | # 4382889 75 usr/lib/libc | # optimized libc 76 usr/lib/rcm | # 4426119 77 usr/perl5 | # alan's taking care of these :-) 78 usr/src # no need to look at shipped source 79}x; 80 81# Define any files we should skip completely. 82$SkipFiles = qr{ ^(?: 83 lddstub | # lddstub has no dependencies 84 geniconvtbl\.so | # 4384329 85 libssagent\.so\.1 | # 4328854 86 libpsvcplugin_psr\.so\.1 | # 4385799 87 libpsvcpolicy_psr\.so\.1 | # " " 88 libpsvcpolicy\.so\.1 | # " " 89 picl_slm\.so | # " " 90 mod_ipp\.so | # Apache loadable module 91 fptest | # USIII specific extns. cause ldd noise on USII bld. m/c 92 grub 93 )$ 94}x; 95 96# Define any files that are allowed text relocations. 97$SkipTextrelFiles = qr{ ^(?: 98 unix | # kernel models are non-pic 99 mdb # relocations against __RTC (dbx) 100 )$ 101}x; 102 103# Define any directories or files that are allowed to have no direct bound 104# symbols 105$SkipDirectBindDirs = qr{ 106 usr/ucb 107}x; 108 109$SkipDirectBindFiles = qr{ ^(?: 110 unix | 111 sbcp | 112 libproc.so.1 | 113 libnisdb.so.2 114 )$ 115}x; 116 117# Define any files that are allowed undefined references. 118 119$SkipUndefFiles = qr{ ^(?: 120 libsvm\.so\.1 | # libspmicommon.so.1 lacking 121 libnisdb\.so\.2 # C++ 122 )$ 123}x; 124 125# Define any files that have unused dependencies. 126$SkipUnusedDeps = qr{ 127 lib/picl/plugins/ | # require devtree dependencies 128 /lib/libp # profile libc makes libm an unused 129}x; # dependency of standard libc 130 131# Define any objects that always look unused. 132$SkipUnusedObject = qr{ 133 /libm_hwcap[0-9]+\.so\.2 # libm.so.2 dependency 134}x; 135 136# Define any files that should contain debugging information. 137$SkipStabFiles = qr{ ^(?: 138 unix 139 )$ 140}x; 141 142# Define any files that don't require a non-executable stack definition. 143$SkipNoExStkFiles = qr{ ^(?: 144 forth | 145 unix | 146 multiboot 147 )$ 148}x; 149 150# Identify any files that should be skipped when building a crle(1) 151# configuration file. As the hwcap libraries can be loop-back mounted onto 152# libc, these can confuse crle(1) because of their identical dev/inode. 153$SkipCrleConf = qr{ 154 lib/libc/libc_hwcap 155}x; 156 157# Skip "unused search path=" ldd(1) diagnostics. 158$SkipUnusedSearchPath = qr{ 159 /usr/lib/fs/autofs.*\ from\ .automountd | # dlopen() 160 /etc/ppp/plugins.*\ from\ .*pppd | # dlopen() 161 /usr/lib/inet/ppp.*\ from\ .*pppd | # dlopen() 162 /usr/sfw/lib.*\ from\ .*libipsecutil.so.1 | # dlopen() 163 /usr/platform/.*rsmlib.*\ from\ .*librsm.so.2 | # dlopen() 164 \$ORIGIN.*\ from\ .*fcode.so | # dlopen() 165 /opt/VRTSvxvm/lib.*\ from\ .*libdiskmgt\.so\.1 | # dlopen() 166 /usr/platform/.*\ from\ .*/usr/platform | # picl 167 /usr/lib/picl/.*\ from\ .*/usr/platform | # picl 168 /usr/platform/.*\ from\ .*/usr/lib/picl | # picl 169 /usr/lib/smbsrv.*\ from\ .*libsmb\.so\.1 | # future needs 170 /usr/lib/mps/secv1.*\ from\ .*libnss3\.so | # non-OSNet 171 /usr/lib/mps.*\ from\ .*libnss3\.so | # non-OSNet 172 /usr/sfw/lib.*\ from\ .*libdbus-1\.so\.3 | # non-OSNet 173 /usr/sfw/lib.*\ from\ .*libdbus-glib-1\.so\.2 | # non-OSNet 174 /usr/sfw/lib.*\ from\ .*libglib-2\.0\.so\.0 | # non-OSNet 175 /usr/X11/lib.*\ from\ .*libglib-2\.0\.so\.0 | # non-OSNet 176 /usr/sfw/lib.*\ from\ .*libgmodule-2\.0\.so\.0 | # non-OSNet 177 /usr/X11/lib.*\ from\ .*libgmodule-2\.0\.so\.0 | # non-OSNet 178 /usr/sfw/lib.*\ from\ .*libgnomevfs-2\.so\.0 | # non-OSNet 179 /usr/sfw/lib.*\ from\ .*libgobject-2\.0\.so\.0 | # non-OSNet 180 /usr/X11/lib.*\ from\ .*libgobject-2\.0\.so\.0 | # non-OSNet 181 /usr/sfw/lib.*\ from\ .*libgthread-2\.0\.so\.0 | # non-OSNet 182 /usr/X11/lib.*\ from\ .*libgthread-2\.0\.so\.0 | # non-OSNet 183 /usr/sfw/lib.*\ from\ .*libcrypto\.so\.0\.9\.8 | # non-OSNet 184 /usr/sfw/lib.*\ from\ .*libnetsnmp\.so\.5 | # non-OSNet 185 /usr/sfw/lib.*\ from\ .*libgcc_s\.so\.1 | # non-OSNet 186 /usr.*\ from\ .*tst\.gcc\.exe | # gcc built 187 /usr/postgres/8.3/lib.*\ from\ .*libpq\.so\.5 | # non-OSNET 188 /usr/sfw/lib.*\ from\ .*libpq\.so\.5 # non-OSNET 189}x; 190 191# Skip "unreferenced object=" ldd(1) diagnostics. 192$SkipUnrefObject = qr{ 193 /libmapmalloc\.so\.1;\ unused\ dependency\ of | # interposer 194 /libstdc\+\+\.so\.6;\ unused\ dependency\ of | # gcc build 195 /libm\.so\.2.*\ of\ .*libstdc\+\+\.so\.6 | # gcc build 196 /lib.*\ of\ .*/lib/picl/plugins/ | # picl 197 /lib.*\ of\ .*libcimapi\.so | # non-OSNET 198 /lib.*\ of\ .*libjvm\.so | # non-OSNET 199 /lib.*\ of\ .*libnetsnmp\.so\.5 | # non-OSNET 200 /lib.*\ of\ .*libnetsnmpagent\.so\.5 | # non-OSNET 201 /lib.*\ of\ .*libnetsnmpmibs\.so\.5 | # non-OSNET 202 /lib.*\ of\ .*libnetsnmphelpers\.so\.5 | # non-OSNET 203 /lib.*\ of\ .*libnspr4\.so | # non-OSNET 204 /lib.*\ of\ .*libsoftokn3\.so | # non-OSNET 205 /lib.*\ of\ .*libspmicommon\.so\.1 | # non-OSNET 206 /lib.*\ of\ .*libspmocommon\.so\.1 | # non-OSNET 207 /lib.*\ of\ .*libssl3\.so | # non-OSNET 208 /lib.*\ of\ .*libxml2\.so\.2 | # non-OSNET 209 /lib.*\ of\ .*libxslt\.so\.1 | # non-OSNET 210 /lib.*\ of\ .*libpq\.so\.4 | # non-OSNET 211 /lib.*\ of\ .*libpython2\.4\.so\.1\.0 # non-OSNET 212}x; 213 214# Define any files that should only have unused (ldd -u) processing. 215$UnusedPaths = qr{ 216 ucb/shutdown # libucb interposes on libc and makes 217 # dependencies on libc seem unnecessary 218}x; 219 220# Define interpreters we should ignore. 221$SkipInterps = qr{ 222 misc/krtld | 223 misc/amd64/krtld | 224 misc/sparcv9/krtld 225}x; 226 227# Catch libintl and libw, although ld(1) will bind to these and thus determine 228# they're needed, their content was moved into libc as of on297 build 7. 229# libthread and libpthread were completely moved into libc as of on10 build 53. 230# libdl was moved into libc as of on10 build 49. librt and libaio were moved 231# into libc as of Nevada build 44. 232$OldDeps = qr{ ^(?: 233 libintl\.so\.1 | 234 libw\.so\.1 | 235 libthread\.so\.1 | 236 libpthread\.so\.1 | 237 libdl\.so\.1 | 238 librt\.so\.1 | 239 libaio\.so\.1 240 )$ 241}x; 242 243# Files for which we skip checking of duplicate addresses in the 244# symbol sort sections. Such exceptions should be rare --- most code will 245# not have duplicate addresses, since it takes assember or a "#pragma weak" 246# to do such aliasing in C. C++ is different: The compiler generates aliases 247# for implementation reasons, and the mangled names used to encode argument 248# and return value types are difficult to handle well in mapfiles. 249# Furthermore, the Sun compiler and gcc use different and incompatible 250# name mangling conventions. Since ON must be buildable by either, we 251# would have to maintain two sets of mapfiles for each such object. 252# C++ use is rare in ON, so this is not worth pursuing. 253# 254$SkipSymSort = qr{ ^.*(?: 255 opt/SUNWdtrt/tst/common/pid/tst.weak2.exe | # DTrace test 256 lib/amd64/libnsl\.so\.1 | # C++ 257 lib/sparcv9/libnsl\.so\.1 | # C++ 258 lib/sparcv9/libfru\.so\.1 | # C++ 259 usr/lib/sgml/nsgmls | # C++ 260 usr/lib/lms | # C++ 261 ld\.so\.1 | # libc_pic.a user 262 lib/libsun_fc\.so\.1 | # C++ 263 lib/amd64/libsun_fc\.so\.1 | # C++ 264 lib/sparcv9/libsun_fc\.so\.1 # C++ 265 )$ 266}x; 267 268use Getopt::Std; 269 270# ----------------------------------------------------------------------------- 271 272# Reliably compare two OS revisions. Arguments are <ver1> <op> <ver2>. 273# <op> is the string form of a normal numeric comparison operator. 274sub cmp_os_ver { 275 my @ver1 = split(/\./, $_[0]); 276 my $op = $_[1]; 277 my @ver2 = split(/\./, $_[2]); 278 279 push @ver2, ("0") x $#ver1 - $#ver2; 280 push @ver1, ("0") x $#ver2 - $#ver1; 281 282 my $diff = 0; 283 while (@ver1 || @ver2) { 284 if (($diff = shift(@ver1) - shift(@ver2)) != 0) { 285 last; 286 } 287 } 288 return (eval "$diff $op 0" ? 1 : 0); 289} 290 291# This script relies on ldd returning output reflecting only the binary 292# contents. But if LD_PRELOAD* environment variables are present, libraries 293# named by them will also appear in the output, disrupting our analysis. 294# So, before we get too far, scrub the environment. 295 296delete($ENV{LD_PRELOAD}); 297delete($ENV{LD_PRELOAD_32}); 298delete($ENV{LD_PRELOAD_64}); 299 300# Establish a program name for any error diagnostics. 301chomp($Prog = `basename $0`); 302 303# Determine what machinery is available. 304$Mach = `uname -p`; 305$Isalist = `isalist`; 306$Env = ""; 307if ($Mach =~ /sparc/) { 308 if ($Isalist =~ /sparcv9/) { 309 $Ena64 = "ok"; 310 } 311} elsif ($Mach =~ /i386/) { 312 if ($Isalist =~ /amd64/) { 313 $Ena64 = "ok"; 314 } 315} 316 317# Check that we have arguments. 318if ((getopts('ad:imosv', \%opt) == 0) || ($#ARGV == -1)) { 319 print "usage: $Prog [-a] [-d depdir] [-m] [-o] [-s] file | dir, ...\n"; 320 print "\t[-a]\t\tprocess all files (ignore any exception lists)\n"; 321 print "\t[-d dir]\testablish dependencies from under directory\n"; 322 print "\t[-i]\t\tproduce dynamic table entry information\n"; 323 print "\t[-m]\t\tprocess mcs(1) comments\n"; 324 print "\t[-o]\t\tproduce one-liner output (prefixed with pathname)\n"; 325 print "\t[-s]\t\tprocess .stab and .symtab entries\n"; 326 print "\t[-v]\t\tprocess version definition entries\n"; 327 exit 1; 328} else { 329 my($Proto); 330 331 if ($opt{d}) { 332 # User specified dependency directory - make sure it exists. 333 if (! -d $opt{d}) { 334 print "$Prog: $opt{d} is not a directory\n"; 335 exit 1; 336 } 337 $Proto = $opt{d}; 338 339 } elsif ($ENV{CODEMGR_WS}) { 340 my($Root); 341 342 # Without a user specified dependency directory see if we're 343 # part of a codemanager workspace and if a proto area exists. 344 if (($Root = $ENV{ROOT}) && (-d $Root)) { 345 $Proto = $Root; 346 } 347 } 348 349 if (!($Tmpdir = $ENV{TMPDIR}) || (! -d $Tmpdir)) { 350 $Tmpdir = "/tmp"; 351 } 352 353 # Determine whether this is a __GNUC build. If so, unused search path 354 # processing is disabled. 355 if (defined $ENV{__GNUC}) { 356 $Gnuc = 1; 357 } else { 358 $Gnuc = 0; 359 } 360 361 # Look for dependencies under $Proto. 362 if ($Proto) { 363 # To support alternative dependency mapping we'll need ldd(1)'s 364 # -e option. This is relatively new (s81_30), so make sure 365 # ldd(1) is capable before gathering any dependency information. 366 if (system('ldd -e /usr/lib/lddstub 2> /dev/null')) { 367 print "ldd: does not support -e, unable to "; 368 print "create alternative dependency mappingings.\n"; 369 print "ldd: option added under 4390308 (s81_30).\n\n"; 370 } else { 371 # Gather dependencies and construct a alternative 372 # dependency mapping via a crle(1) configuration file. 373 GetDeps($Proto, "/"); 374 GenConf(); 375 } 376 } 377 378 # To support unreferenced dependency detection we'll need ldd(1)'s -U 379 # option. This is relatively new (4638070), and if not available we 380 # can still fall back to -u. Even with this option, don't use -U with 381 # releases prior to 5.10 as the cleanup for -U use only got integrated 382 # into 5.10 under 4642023. Note, that nightly doesn't typically set a 383 # RELEASE from the standard <env> files. Users who wish to disable use 384 # of ldd(1)'s -U should set (or uncomment) RELEASE in their <env> file 385 # if using nightly, or otherwise establish it in their environment. 386 if (system('ldd -U /usr/lib/lddstub 2> /dev/null')) { 387 $LddNoU = 1; 388 } else { 389 my($Release); 390 391 if (($Release = $ENV{RELEASE}) && 392 (cmp_os_ver($Release, "<", "5.10"))) { 393 $LddNoU = 1; 394 } else { 395 $LddNoU = 0; 396 } 397 } 398 399 # For each argument determine if we're dealing with a file or directory. 400 foreach my $Arg (@ARGV) { 401 # Ignore symbolic links. 402 if (-l $Arg) { 403 next; 404 } 405 406 if (!stat($Arg)) { 407 next; 408 } 409 410 # Process simple files. 411 if (-f _) { 412 my($RelPath) = $Arg; 413 my($File) = $Arg; 414 my($Secure) = 0; 415 416 $RelPath =~ s!^.*/!./!; 417 $File =~ s!^.*/!!; 418 419 if (-u _ || -g _) { 420 $Secure = 1; 421 } 422 423 ProcFile($Arg, $RelPath, $File, $Secure); 424 next; 425 } 426 # Process directories. 427 if (-d _) { 428 ProcDir($Arg, "."); 429 next; 430 } 431 432 print "$Arg is not a file or directory\n"; 433 $Error = 1; 434 } 435 436 # Cleanup 437 CleanUp(); 438} 439 440$Error = 0; 441 442# Clean up any temporary files. 443sub CleanUp { 444 if ($Crle64) { 445 unlink $Crle64; 446 } 447 if ($Conf64) { 448 unlink $Conf64; 449 } 450 if ($Crle32) { 451 unlink $Crle32; 452 } 453 if ($Conf32) { 454 unlink $Conf32; 455 } 456} 457 458# Create an output message, either a one-liner (under -o) or preceded by the 459# files relative pathname as a title. 460sub OutMsg { 461 my($Ttl, $Path, $Msg) = @_; 462 463 if ($opt{o}) { 464 $Msg =~ s/^[ \t]*//; 465 print "$Path: $Msg\n"; 466 } else { 467 if ($Ttl eq 0) { 468 print "==== $Path ====\n"; 469 } 470 print "$Msg\n"; 471 } 472} 473 474# Determine whether this a ELF dynamic object and if so investigate its runtime 475# attributes. 476sub ProcFile { 477 my($FullPath, $RelPath, $File, $Secure) = @_; 478 my(@Elf, @Ldd, $Dyn, $Intp, $Dll, $Ttl, $Sym, $Interp, $Stack); 479 my($Sun, $Relsz, $Pltsz, $Tex, $Stab, $Strip, $Lddopt, $SymSort); 480 my($Val, $Header, $SkipLdd, $IsX86, $RWX, $UnDep); 481 my($HasDirectBinding, $HasVerdef); 482 483 # Ignore symbolic links. 484 if (-l $FullPath) { 485 return; 486 } 487 488 $Ttl = 0; 489 @Ldd = 0; 490 491 # Determine whether we have access to inspect the file. 492 if (!(-r $FullPath)) { 493 OutMsg($Ttl++, $RelPath, 494 "\tunable to inspect file: permission denied"); 495 return; 496 } 497 498 # Determine if this is a file we don't care about. 499 if (!$opt{a}) { 500 if ($File =~ $SkipFiles) { 501 return; 502 } 503 } 504 505 # Determine whether we have a executable (static or dynamic) or a 506 # shared object. 507 @Elf = split(/\n/, `elfdump -epdicyv $FullPath 2>&1`); 508 509 $Dyn = $Intp = $Dll = $Stack = $IsX86 = $RWX = 0; 510 $Interp = 1; 511 $Header = 'None'; 512 foreach my $Line (@Elf) { 513 # If we have an invalid file type (which we can tell from the 514 # first line), or we're processing an archive, bail. 515 if ($Header eq 'None') { 516 if (($Line =~ /invalid file/) || 517 ($Line =~ /$FullPath(.*):/)) { 518 return; 519 } 520 } 521 522 if ($Line =~ /^ELF Header/) { 523 $Header = 'Ehdr'; 524 525 } elsif ($Line =~ /^Program Header/) { 526 $Header = 'Phdr'; 527 $RWX = 0; 528 529 } elsif ($Line =~ /^Interpreter/) { 530 $Header = 'Intp'; 531 532 } elsif ($Line =~ /^Dynamic Section/) { 533 # A dynamic section indicates we're a dynamic object 534 # (this makes sure we don't check static executables). 535 $Dyn = 1; 536 537 } elsif (($Header eq 'Ehdr') && ($Line =~ /e_type:/)) { 538 # The e_type field indicates whether this file is a 539 # shared object (ET_DYN) or an executable (ET_EXEC). 540 if ($Line =~ /ET_DYN/) { 541 $Dll = 1; 542 } elsif ($Line !~ /ET_EXEC/) { 543 return; 544 } 545 } elsif (($Header eq 'Ehdr') && ($Line =~ /ei_class:/)) { 546 # If we encounter a 64-bit object, but we're not running 547 # on a 64-bit system, suppress calling ldd(1). 548 if (($Line =~ /ELFCLASS64/) && !$Ena64) { 549 $SkipLdd = 1; 550 } 551 } elsif (($Header eq 'Ehdr') && ($Line =~ /e_machine:/)) { 552 # If it's a X86 object, we need to enforce RW- data. 553 if (($Line =~ /(EM_AMD64|EM_386)/)) { 554 $IsX86 = 1; 555 } 556 } elsif (($Header eq 'Phdr') && 557 ($Line =~ /\[ PF_X PF_W PF_R \]/)) { 558 # RWX segment seen. 559 $RWX = 1; 560 561 } elsif (($Header eq 'Phdr') && 562 ($Line =~ /\[ PT_LOAD \]/ && $RWX && $IsX86)) { 563 # Seen an RWX PT_LOAD segment. 564 if ($File !~ $SkipNoExStkFiles) { 565 OutMsg($Ttl++, $RelPath, 566 "\tapplication requires non-executable " . 567 "data\t<no -Mmapfile_noexdata?>"); 568 } 569 570 } elsif (($Header eq 'Phdr') && 571 ($Line =~ /\[ PT_SUNWSTACK \]/)) { 572 # This object defines a non-executable stack. 573 $Stack = 1; 574 575 } elsif (($Header eq 'Intp') && !$opt{a} && 576 ($Line =~ $SkipInterps)) { 577 # This object defines an interpretor we should skip. 578 $Interp = 0; 579 } 580 } 581 582 # Determine whether this ELF executable or shared object has a 583 # conforming mcs(1) comment section. If the correct $(POST_PROCESS) 584 # macros are used, only a 3 or 4 line .comment section should exist 585 # containing one or two "@(#)SunOS" identifying comments (one comment 586 # for a non-debug build, and two for a debug build). The results of 587 # the following split should be three or four lines, the last empty 588 # line being discarded by the split. 589 if ($opt{m}) { 590 my(@Mcs, $Con, $Dev); 591 592 @Mcs = split(/\n/, `mcs -p $FullPath 2>&1`); 593 594 $Con = $Dev = $Val = 0; 595 foreach my $Line (@Mcs) { 596 $Val++; 597 598 if (($Val == 3) && ($Line !~ /^@\(#\)SunOS/)) { 599 $Con = 1; 600 last; 601 } 602 if (($Val == 4) && ($Line =~ /^@\(#\)SunOS/)) { 603 $Dev = 1; 604 next; 605 } 606 if (($Dev == 0) && ($Val == 4)) { 607 $Con = 1; 608 last; 609 } 610 if (($Dev == 1) && ($Val == 5)) { 611 $Con = 1; 612 last; 613 } 614 } 615 if ($opt{m} && ($Con == 1)) { 616 OutMsg($Ttl++, $RelPath, 617 "\tnon-conforming mcs(1) comment\t<no \$(POST_PROCESS)?>"); 618 } 619 } 620 621 # Applications should contain a non-executable stack definition. 622 if (($Dll == 0) && ($Stack == 0)) { 623 if (!$opt{a}) { 624 if ($File =~ $SkipNoExStkFiles) { 625 goto DYN; 626 } 627 } 628 OutMsg($Ttl++, $RelPath, 629 "\tapplication requires non-executable stack\t<no -Mmapfile_noexstk?>"); 630 } 631 632DYN: 633 # Having caught any static executables in the mcs(1) check and non- 634 # executable stack definition check, continue with dynamic objects 635 # from now on. 636 if ($Dyn eq 0) { 637 return; 638 } 639 640 # Only use ldd unless we've encountered an interpreter that should 641 # be skipped. 642 if (!$SkipLdd && $Interp) { 643 my $LDDFullPath = $FullPath; 644 645 if ($Secure) { 646 # The execution of a secure application over an nfs file 647 # system mounted nosuid will result in warning messages 648 # being sent to /var/adm/messages. As this type of 649 # environment can occur with root builds, move the file 650 # being investigated to a safe place first. In addition 651 # remove its secure permission so that it can be 652 # influenced by any alternative dependency mappings. 653 654 my($TmpPath) = "$Tmpdir/$File"; 655 656 system('cp', $LDDFullPath, $TmpPath); 657 chmod 0777, $TmpPath; 658 $LDDFullPath = $TmpPath; 659 } 660 661 # Use ldd(1) to determine the objects relocatability and use. 662 # By default look for all unreferenced dependencies. However, 663 # some objects have legitimate dependencies that they do not 664 # reference. 665 if ($LddNoU || ($RelPath =~ $UnusedPaths)) { 666 $Lddopt = "-ru"; 667 } else { 668 $Lddopt = "-rU"; 669 } 670 @Ldd = split(/\n/, `ldd $Lddopt $Env $LDDFullPath 2>&1`); 671 if ($Secure) { 672 unlink $LDDFullPath; 673 } 674 } 675 676 $Val = 0; 677 $Sym = 5; 678 $UnDep = 1; 679 680 foreach my $Line (@Ldd) { 681 682 if ($Val == 0) { 683 $Val = 1; 684 # Make sure ldd(1) worked. One possible failure is that 685 # this is an old ldd(1) prior to -e addition (4390308). 686 if ($Line =~ /usage:/) { 687 $Line =~ s/$/\t<old ldd(1)?>/; 688 OutMsg($Ttl++, $RelPath, $Line); 689 last; 690 } elsif ($Line =~ /execution failed/) { 691 OutMsg($Ttl++, $RelPath, $Line); 692 last; 693 } 694 695 # It's possible this binary can't be executed, ie. we've 696 # found a sparc binary while running on an intel system, 697 # or a sparcv9 binary on a sparcv7/8 system. 698 if ($Line =~ /wrong class/) { 699 OutMsg($Ttl++, $RelPath, 700 "\thas wrong class or data encoding"); 701 next; 702 } 703 704 # Historically, ldd(1) likes executable objects to have 705 # their execute bit set. Note that this test isn't 706 # applied unless the -a option is in effect, as any 707 # non-executable files are skipped by default to reduce 708 # the cost of running this script. 709 if ($Line =~ /not executable/) { 710 OutMsg($Ttl++, $RelPath, 711 "\tis not executable"); 712 next; 713 } 714 } 715 716 # Look for "file" or "versions" that aren't found. Note that 717 # these lines will occur before we find any symbol referencing 718 # errors. 719 if (($Sym == 5) && ($Line =~ /not found\)/)) { 720 if ($Line =~ /file not found\)/) { 721 $Line =~ s/$/\t<no -zdefs?>/; 722 } 723 OutMsg($Ttl++, $RelPath, $Line); 724 next; 725 } 726 # Look for relocations whose symbols can't be found. Note, we 727 # only print out the first 5 relocations for any file as this 728 # output can be excessive. 729 if ($Sym && ($Line =~ /symbol not found/)) { 730 # Determine if this file is allowed undefined 731 # references. 732 if ($Sym == 5) { 733 if (!$opt{a}) { 734 if ($File =~ $SkipUndefFiles) { 735 $Sym = 0; 736 next; 737 } 738 } 739 } 740 if ($Sym-- == 1) { 741 if (!$opt{o}) { 742 OutMsg($Ttl++, $RelPath, 743 "\tcontinued ..."); 744 } 745 next; 746 } 747 # Just print the symbol name. 748 $Line =~ s/$/\t<no -zdefs?>/; 749 OutMsg($Ttl++, $RelPath, $Line); 750 next; 751 } 752 # Look for any unused search paths. 753 if ($Line =~ /unused search path=/) { 754 # Note, skip this comparison for __GNUC builds, as the 755 # gnu compilers insert numerous unused search paths. 756 if ($Gnuc == 1) { 757 next; 758 } 759 if (!$opt{a}) { 760 if ($Line =~ $SkipUnusedSearchPath) { 761 next; 762 } 763 } 764 if ($Secure) { 765 $Line =~ s!$Tmpdir/!!; 766 } 767 $Line =~ s/^[ \t]*(.*)/\t$1\t<remove search path?>/; 768 OutMsg($Ttl++, $RelPath, $Line); 769 next; 770 } 771 # Look for unreferenced dependencies. Note, if any unreferenced 772 # objects are ignored, then set $UnDep so as to suppress any 773 # associated unused-object messages. 774 if ($Line =~ /unreferenced object=/) { 775 if (!$opt{a}) { 776 if ($Line =~ $SkipUnrefObject) { 777 $UnDep = 0; 778 next; 779 } 780 } 781 if ($Secure) { 782 $Line =~ s!$Tmpdir/!!; 783 } 784 $Line =~ s/^[ \t]*(.*)/\t$1\t<remove lib or -zignore?>/; 785 OutMsg($Ttl++, $RelPath, $Line); 786 next; 787 } 788 # Look for any unused dependencies. 789 if ($UnDep && ($Line =~ /unused/)) { 790 if (!$opt{a}) { 791 if ($RelPath =~ $SkipUnusedDeps) { 792 next; 793 } 794 if ($Line =~ $SkipUnusedObject) { 795 next; 796 } 797 } 798 if ($Secure) { 799 $Line =~ s!$Tmpdir/!!; 800 } 801 $Line =~ s/^[ \t]*(.*)/\t$1\t<remove lib or -zignore?>/; 802 OutMsg($Ttl++, $RelPath, $Line); 803 next; 804 } 805 } 806 807 # Reuse the elfdump(1) data to investigate additional dynamic linking 808 # information. 809 810 $Sun = $Relsz = $Pltsz = $Dyn = $Stab = $SymSort = 0; 811 $Tex = $Strip = 1; 812 $HasDirectBinding = 0; 813 $HasVerdef = 0; 814 815 $Header = 'None'; 816ELF: foreach my $Line (@Elf) { 817 # We're only interested in the section headers and the dynamic 818 # section. 819 if ($Line =~ /^Section Header/) { 820 $Header = 'Shdr'; 821 822 if (($Sun == 0) && ($Line =~ /\.SUNW_reloc/)) { 823 # This object has a combined relocation section. 824 $Sun = 1; 825 826 } elsif (($Stab == 0) && ($Line =~ /\.stab/)) { 827 # This object contain .stabs sections 828 $Stab = 1; 829 } elsif (($SymSort == 0) && 830 ($Line =~ /\.SUNW_dyn(sym)|(tls)sort/)) { 831 # This object contains a symbol sort section 832 $SymSort = 1; 833 } 834 835 if (($Strip == 1) && ($Line =~ /\.symtab/)) { 836 # This object contains a complete symbol table. 837 $Strip = 0; 838 } 839 next; 840 841 } elsif ($Line =~ /^Dynamic Section/) { 842 $Header = 'Dyn'; 843 next; 844 } elsif ($Line =~ /^Syminfo Section/) { 845 $Header = 'Syminfo'; 846 next; 847 } elsif ($Line =~ /^Version Definition Section/) { 848 $HasVerdef = 1; 849 next; 850 } elsif (($Header ne 'Dyn') && ($Header ne 'Syminfo')) { 851 next; 852 } 853 854 # Look into the Syminfo section. 855 # Does this object have at least one Directly Bound symbol? 856 if (($Header eq 'Syminfo')) { 857 my(@Symword); 858 859 if ($HasDirectBinding == 1) { 860 next; 861 } 862 863 @Symword = split(' ', $Line); 864 865 if (!defined($Symword[1])) { 866 next; 867 } 868 if ($Symword[1] =~ /B/) { 869 $HasDirectBinding = 1; 870 } 871 next; 872 } 873 874 # Does this object contain text relocations. 875 if ($Tex && ($Line =~ /TEXTREL/)) { 876 # Determine if this file is allowed text relocations. 877 if (!$opt{a}) { 878 if ($File =~ $SkipTextrelFiles) { 879 $Tex = 0; 880 next ELF; 881 } 882 } 883 OutMsg($Ttl++, $RelPath, 884 "\tTEXTREL .dynamic tag\t\t\t<no -Kpic?>"); 885 $Tex = 0; 886 next; 887 } 888 889 # Does this file have any relocation sections (there are a few 890 # psr libraries with no relocations at all, thus a .SUNW_reloc 891 # section won't exist either). 892 if (($Relsz == 0) && ($Line =~ / RELA?SZ/)) { 893 $Relsz = hex((split(' ', $Line))[2]); 894 next; 895 } 896 897 # Does this file have any plt relocations. If the plt size is 898 # equivalent to the total relocation size then we don't have 899 # any relocations suitable for combining into a .SUNW_reloc 900 # section. 901 if (($Pltsz == 0) && ($Line =~ / PLTRELSZ/)) { 902 $Pltsz = hex((split(' ', $Line))[2]); 903 next; 904 } 905 906 # Does this object have any dependencies. 907 if ($Line =~ /NEEDED/) { 908 my($Need) = (split(' ', $Line))[3]; 909 910 if ($Need =~ $OldDeps) { 911 # Catch any old (unnecessary) dependencies. 912 OutMsg($Ttl++, $RelPath, 913 "\tNEEDED=$Need\t<dependency no longer necessary>"); 914 } elsif ($opt{i}) { 915 # Under the -i (information) option print out 916 # any useful dynamic entries. 917 OutMsg($Ttl++, $RelPath, "\tNEEDED=$Need"); 918 } 919 next; 920 } 921 922 # Is this object built with -B direct flag on? 923 if ($Line =~ / DIRECT /) { 924 $HasDirectBinding = 1; 925 } 926 927 # Does this object specify a runpath. 928 if ($opt{i} && ($Line =~ /RPATH/)) { 929 my($Rpath) = (split(' ', $Line))[3]; 930 OutMsg($Ttl++, $RelPath, "\tRPATH=$Rpath"); 931 next; 932 } 933 } 934 935 # A shared object, that contains non-plt relocations, should have a 936 # combined relocation section indicating it was built with -z combreloc. 937 if ($Dll && $Relsz && ($Relsz != $Pltsz) && ($Sun == 0)) { 938 OutMsg($Ttl++, $RelPath, 939 "\tSUNW_reloc section missing\t\t<no -zcombreloc?>"); 940 } 941 942 # No objects released to a customer should have any .stabs sections 943 # remaining, they should be stripped. 944 if ($opt{s} && $Stab) { 945 if (!$opt{a}) { 946 if ($File =~ $SkipStabFiles) { 947 goto DONESTAB; 948 } 949 } 950 OutMsg($Ttl++, $RelPath, 951 "\tdebugging sections should be deleted\t<no strip -x?>"); 952 } 953 954 # Identify an object that is not built with either -B direct or 955 # -z direct. 956 if (($RelPath =~ $SkipDirectBindDirs) || 957 ($File =~ $SkipDirectBindFiles)) { 958 goto DONESTAB; 959 } 960 if ($Relsz && ($HasDirectBinding == 0)) { 961 OutMsg($Ttl++, $RelPath, 962 "\tobject has no direct bindings\t<no -B direct or -z direct?>"); 963 } 964 965DONESTAB: 966 967 # All objects should have a full symbol table to provide complete 968 # debugging stack traces. 969 if ($Strip) { 970 OutMsg($Ttl++, $RelPath, 971 "\tsymbol table should not be stripped\t<remove -s?>"); 972 } 973 974 # If there are symbol sort sections in this object, report on 975 # any that have duplicate addresses. 976 ProcSymSort($FullPath, $RelPath, \$Ttl) if $SymSort; 977 978 # If -v was specified, and the object has a version definition 979 # section, generate output showing each public symbol and the 980 # version it belongs to. 981 ProcVerdef($FullPath, $RelPath, \$Ttl) if $HasVerdef && $opt{v}; 982} 983 984 985## ProcSymSortOutMsg(RefTtl, RelPath, secname, addr, names...) 986# 987# Call OutMsg for a duplicate address error in a symbol sort 988# section 989# 990sub ProcSymSortOutMsg { 991 my($RefTtl, $RelPath, $secname, $addr, @names) = @_; 992 993 OutMsg($$RefTtl++, $RelPath, 994 "$secname: duplicate $addr: ". join(', ', @names)); 995} 996 997 998## ProcSymSort(FullPath, RelPath) 999# 1000# Examine the symbol sort sections for the given object and report 1001# on any duplicate addresses found. Ideally, mapfile directives 1002# should be used when building objects that have multiple symbols 1003# with the same address so that only one of them appears in the sort 1004# section. This saves space, reduces user confusion, and ensures that 1005# libproc and debuggers always display public names instead of symbols 1006# that are merely implementation details. 1007# 1008sub ProcSymSort { 1009 1010 my($FullPath, $RelPath, $RefTtl) = @_; 1011 1012 # If this object is exempt from checking, return quietly 1013 return if ($FullPath =~ $SkipSymSort); 1014 1015 1016 open(SORT, "elfdump -S $FullPath|") || 1017 die "$Prog: Unable to execute elfdump (symbol sort sections)\n"; 1018 1019 my $line; 1020 my $last_addr; 1021 my @dups = (); 1022 my $secname; 1023 while ($line = <SORT>) { 1024 chomp $line; 1025 1026 next if ($line eq ''); 1027 1028 # If this is a header line, pick up the section name 1029 if ($line =~ /^Symbol Sort Section:\s+([^\s]+)\s+/) { 1030 $secname = $1; 1031 1032 # Every new section is followed by a column header line 1033 $line = <SORT>; # Toss header line 1034 1035 # Flush anything left from previous section 1036 ProcSymSortOutMsg($RefTtl, $RelPath, $secname, 1037 $last_addr, @dups) if (scalar(@dups) > 1); 1038 1039 # Reset variables for new sort section 1040 $last_addr = ''; 1041 @dups = (); 1042 1043 next; 1044 } 1045 1046 # Process symbol line 1047 my @fields = split /\s+/, $line; 1048 my $new_addr = $fields[2]; 1049 my $new_type = $fields[8]; 1050 my $new_name = $fields[9]; 1051 1052 if ($new_type eq 'UNDEF') { 1053 OutMsg($RefTtl++, $RelPath, 1054 "$secname: unexpected UNDEF symbol " . 1055 "(link-editor error): $new_name"); 1056 next; 1057 } 1058 1059 if ($new_addr eq $last_addr) { 1060 push @dups, $new_name; 1061 } else { 1062 ProcSymSortOutMsg($RefTtl, $RelPath, $secname, 1063 $last_addr, @dups) if (scalar(@dups) > 1); 1064 @dups = ( $new_name ); 1065 $last_addr = $new_addr; 1066 } 1067 } 1068 1069 ProcSymSortOutMsg($RefTtl, $RelPath, $secname, $last_addr, @dups) 1070 if (scalar(@dups) > 1); 1071 1072 close SORT; 1073} 1074 1075 1076## ProcVerdef(FullPath, RelPath) 1077# 1078# Examine the version definition section for the given object and report 1079# each public symbol along with the version it belongs to. 1080# 1081sub ProcVerdef { 1082 1083 my($FullPath, $RelPath, $RefTtl) = @_; 1084 my $line; 1085 my $cur_ver = ''; 1086 my $tab = $opt{o} ? '' : "\t"; 1087 1088 # pvs -dov provides information about the versioning hierarchy 1089 # in the file. Lines are of the format: 1090 # path - version[XXX]; 1091 # where [XXX] indicates optional information, such as flags 1092 # or inherited versions. 1093 # 1094 # Private versions are allowed to change freely, so ignore them. 1095 open(PVS, "pvs -dov $FullPath|") || 1096 die "$Prog: Unable to execute pvs (version definition section)\n"; 1097 1098 while ($line = <PVS>) { 1099 chomp $line; 1100 1101 if ($line =~ /^[^\s]+\s+-\s+([^;]+)/) { 1102 my $ver = $1; 1103 1104 next if $ver =~ /private/i; 1105 OutMsg($$RefTtl++, $RelPath, "${tab}VERDEF=$ver"); 1106 } 1107 } 1108 close PVS; 1109 1110 # pvs -dos lists the symbols assigned to each version definition. 1111 # Lines are of the format: 1112 # path - version: symbol; 1113 # path - version: symbol (size); 1114 # where the (size) is added to data items, but not for functions. 1115 # We strip off the size, if present. 1116 1117 open(PVS, "pvs -dos $FullPath|") || 1118 die "$Prog: Unable to execute pvs (version definition section)\n"; 1119 while ($line = <PVS>) { 1120 chomp $line; 1121 if ($line =~ /^[^\s]+\s+-\s+([^:]+):\s*([^\s;]+)/) { 1122 my $ver = $1; 1123 my $sym = $2; 1124 1125 next if $ver =~ /private/i; 1126 1127 if ($opt{o}) { 1128 OutMsg($$RefTtl++, $RelPath, 1129 "VERSION=$ver, SYMBOL=$sym"); 1130 } else { 1131 if ($cur_ver ne $ver) { 1132 OutMsg($$RefTtl++, $RelPath, "\tVERSION=$ver"); 1133 $cur_ver = $ver; 1134 } 1135 OutMsg($$RefTtl++, $RelPath, "\t\tSYMBOL=$sym"); 1136 } 1137 } 1138 } 1139 1140 close PVS; 1141} 1142 1143 1144sub ProcDir { 1145 my($FullDir, $RelDir) = @_; 1146 my($NewFull, $NewRel); 1147 1148 # Determine if this is a directory we don't care about. 1149 if (!$opt{a}) { 1150 if ($RelDir =~ $SkipDirs) { 1151 return; 1152 } 1153 } 1154 1155 # Open the directory and read each entry, omit files starting with "." 1156 if (opendir(DIR, $FullDir)) { 1157 foreach my $Entry (readdir(DIR)) { 1158 if ($Entry =~ /^\./) { 1159 next; 1160 } 1161 $NewFull = "$FullDir/$Entry"; 1162 1163 # Ignore symlinks. 1164 if (-l $NewFull) { 1165 next; 1166 } 1167 if (!stat($NewFull)) { 1168 next; 1169 } 1170 $NewRel = "$RelDir/$Entry"; 1171 1172 # Descend into and process any directories. 1173 if (-d _) { 1174 ProcDir($NewFull, $NewRel); 1175 next; 1176 } 1177 1178 # Typically dynamic objects are executable, so we can 1179 # reduce the overall cost of this script (a lot!) by 1180 # screening out non-executables here, rather than pass 1181 # them to file(1) later. However, it has been known 1182 # for shared objects to be mistakenly left non- 1183 # executable, so with -a let all files through so that 1184 # this requirement can be verified (see ProcFile()). 1185 if (!$opt{a}) { 1186 if (! -x _) { 1187 next; 1188 } 1189 } 1190 1191 # Process any standard files. 1192 if (-f _) { 1193 my($Secure) = 0; 1194 1195 if (-u _ || -g _) { 1196 $Secure = 1; 1197 } 1198 1199 ProcFile($NewFull, $NewRel, $Entry, $Secure); 1200 next; 1201 } 1202 1203 } 1204 closedir(DIR); 1205 } 1206} 1207 1208# Create a crle(1) script for any 64-bit dependencies we locate. A runtime 1209# configuration file will be generated to establish alternative dependency 1210# mappings for all these dependencies. 1211 1212sub Entercrle64 { 1213 my($FullDir, $RelDir, $Entry) = @_; 1214 1215 if (!$Crle64) { 1216 # Create and initialize the script if is doesn't already exit. 1217 1218 $Crle64 = "$Tmpdir/$Prog.crle64.$$"; 1219 open(CRLE64, "> $Crle64") || 1220 die "$Prog: open failed: $Crle64: $!"; 1221 1222 print CRLE64 "#!/bin/sh\ncrle -64\\\n"; 1223 } 1224 print CRLE64 "\t-o $FullDir -a $RelDir/$Entry \\\n"; 1225} 1226 1227# Create a crle(1) script for any 32-bit dependencies we locate. A runtime 1228# configuration file will be generated to establish alternative dependency 1229# mappings for all these dependencies. 1230 1231sub Entercrle32 { 1232 my($FullDir, $RelDir, $Entry) = @_; 1233 1234 if (!$Crle32) { 1235 # Create and initialize the script if is doesn't already exit. 1236 1237 $Crle32 = "$Tmpdir/$Prog.crle32.$$"; 1238 open(CRLE32, "> $Crle32") || 1239 die "$Prog: open failed: $Crle32: $!"; 1240 1241 print CRLE32 "#!/bin/sh\ncrle \\\n"; 1242 } 1243 print CRLE32 "\t-o $FullDir -a $RelDir/$Entry \\\n"; 1244} 1245 1246# Having finished gathering dependencies, complete any crle(1) scripts and 1247# execute them to generate the associated runtime configuration files. In 1248# addition establish the environment variable required to pass the configuration 1249# files to ldd(1). 1250 1251sub GenConf { 1252 if ($Crle64) { 1253 $Conf64 = "$Tmpdir/$Prog.conf64.$$"; 1254 print CRLE64 "\t-c $Conf64\n"; 1255 1256 chmod 0755, $Crle64; 1257 close CRLE64; 1258 1259 if (system($Crle64)) { 1260 undef $Conf64; 1261 } 1262 } 1263 if ($Crle32) { 1264 $Conf32 = "$Tmpdir/$Prog.conf32.$$"; 1265 print CRLE32 "\t-c $Conf32\n"; 1266 1267 chmod 0755, $Crle32; 1268 close CRLE32; 1269 1270 if (system($Crle32)) { 1271 undef $Conf32; 1272 } 1273 } 1274 1275 if ($Crle64 && $Conf64 && $Crle32 && $Conf32) { 1276 $Env = "-e LD_FLAGS=config_64=$Conf64,config_32=$Conf32"; 1277 } elsif ($Crle64 && $Conf64) { 1278 $Env = "-e LD_FLAGS=config_64=$Conf64"; 1279 } elsif ($Crle32 && $Conf32) { 1280 $Env = "-e LD_FLAGS=config_32=$Conf32"; 1281 } 1282} 1283 1284# Recurse through a directory hierarchy looking for appropriate dependencies. 1285 1286sub GetDeps { 1287 my($FullDir, $RelDir) = @_; 1288 my($NewFull); 1289 1290 # Open the directory and read each entry, omit files starting with "." 1291 if (opendir(DIR, $FullDir)) { 1292 foreach my $Entry (readdir(DIR)) { 1293 if ($Entry =~ /^\./) { 1294 next; 1295 } 1296 $NewFull = "$FullDir/$Entry"; 1297 1298 # We need to follow links so that any dependencies 1299 # are expressed in all their available forms. 1300 # Bail on symlinks like 32 -> . 1301 if (-l $NewFull) { 1302 if (readlink($NewFull) =~ /^\.$/) { 1303 next; 1304 } 1305 } 1306 if (!stat($NewFull)) { 1307 next; 1308 } 1309 1310 if (!$opt{a}) { 1311 if ($NewFull =~ $SkipCrleConf) { 1312 next; 1313 } 1314 } 1315 1316 # If this is a directory descend into it. 1317 if (-d _) { 1318 my($NewRel); 1319 1320 if ($RelDir =~ /^\/$/) { 1321 $NewRel = "$RelDir$Entry"; 1322 } else { 1323 $NewRel = "$RelDir/$Entry"; 1324 } 1325 1326 GetDeps($NewFull, $NewRel); 1327 next; 1328 } 1329 1330 # If this is a regular file determine if its a 1331 # valid ELF dependency. 1332 if (-f _) { 1333 my($File); 1334 1335 # Typically shared object dependencies end with 1336 # ".so" or ".so.?", hence we can reduce the cost 1337 # of this script (a lot!) by screening out files 1338 # that don't follow this pattern. 1339 if (!$opt{a}) { 1340 if ($Entry !~ /\.so(?:\.\d+)*$/) { 1341 next; 1342 } 1343 } 1344 1345 $File = `file $NewFull`; 1346 if ($File !~ /dynamic lib/) { 1347 next; 1348 } 1349 1350 if ($File =~ /32-bit/) { 1351 Entercrle32($FullDir, $RelDir, $Entry); 1352 } elsif ($Ena64) { 1353 Entercrle64($FullDir, $RelDir, $Entry); 1354 } 1355 next; 1356 } 1357 } 1358 closedir(DIR); 1359 } 1360} 1361exit $Error 1362