ld/testsuite/ld-ifunc/ifunc.exp

   1 # Expect script for linker support of IFUNC symbols and relocations.
   2 #
   3 #   Copyright (C) 2009-2018 Free Software Foundation, Inc.
   4 #   Contributed by Red Hat.
   5 #
   6 # This file is part of the GNU Binutils.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 # MA 02110-1301, USA.
  22 #
  23 # Written by Nick Clifton <nickc@redhat.com>
  24
  25
  26 # IFUNC support has only been implemented for the ix86, x86_64, powerpc,
  27 # aarch64, sparc, and S/390 so far.
  28 if {!(([istarget "i?86-*-*"]
  29        || [istarget "x86_64-*-*"]
  30        || [istarget "powerpc*-*-*"]
  31        || [istarget "aarch64*-*-*"]
  32        || [istarget "sparc*-*-*"]
  33        || [istarget "s390*-*-*"])
  34       && ([istarget "*-*-elf*"]
  35           || [istarget "*-*-nacl*"]
  36           || [istarget "*-*-linux*"]
  37           || [istarget "*-*-gnu*"])) } {
  38     verbose "IFUNC tests not run - target does not support IFUNC"
  39     return
  40 }
  41
  42 # Skip targets where -shared is not supported
  43
  44 if ![check_shared_lib_support] {
  45     return
  46 }
  47
  48 # This test does not need a compiler...
  49 run_dump_test "ifuncmod5"
  50
  51 # We need a working compiler.  (Strictly speaking this is
  52 # not true, we could use target specific assembler files).
  53 if { [which $CC] == 0 } {
  54     verbose "IFUNC tests not run - no compiler available"
  55     return
  56 }
  57
  58 # A procedure to check the OS/ABI field in the ELF header of a binary file.
  59 proc check_osabi { binary_file expected_osabi } {
  60     global READELF
  61     global READELFFLAGS
  62
  63     catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
  64
  65     if ![string match "" $got] then {
  66         verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
  67         return 0
  68     }
  69
  70     if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
  71            [file_contents readelf.out] nil osabi] } {
  72         verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
  73         return 0
  74     }
  75
  76     if { $osabi == $expected_osabi } {
  77         return 1
  78     }
  79
  80     verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
  81
  82     return 0
  83 }
  84
  85 # A procedure to confirm that a file contains the IFUNC symbol.
  86 # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
  87 proc contains_ifunc_symbol { binary_file } {
  88     global READELF
  89     global READELFFLAGS
  90
  91     catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
  92
  93     if ![string match "" $got] then {
  94         verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got"
  95         return -1
  96     }
  97
  98     # Look for a line like this:
  99     #    58: 0000000000400600    30 IFUNC   GLOBAL DEFAULT   12 library_func2
 100     # with perhaps some other info between the visibility and section
 101
 102     if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT .* \[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
 103         return 0
 104     }
 105
 106     return 1
 107 }
 108
 109 # A procedure to confirm that a file contains the R_*_IRELATIVE
 110 # relocation.
 111 # Returns -1 upon error, 0 if the relocation was not found and 1 if
 112 # it was found.
 113 proc contains_irelative_reloc { binary_file } {
 114     global READELF
 115     global READELFFLAGS
 116
 117     catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
 118
 119     if ![string match "" $got] then {
 120         verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
 121         return -1
 122     }
 123
 124     # Look for a line like this:
 125     #    0000000000600ab0  0000000000000025 R_X86_64_IRELATIVE      000000000040061c
 126     #    080496f4  0000002a R_386_IRELATIVE
 127
 128
 129     if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
 130         return 0
 131     }
 132
 133     return 1
 134 }
 135
 136 # A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
 137 # Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
 138 proc contains_ifunc_reloc { binary_file } {
 139     global READELF
 140     global READELFFLAGS
 141
 142     catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
 143
 144     if ![string match "" $got] then {
 145         verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
 146         return -1
 147     }
 148
 149     if [string match "" [file_contents readelf.out]] then {
 150         verbose "No relocs found in $binary_file"
 151         return 0
 152     }
 153
 154     if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
 155         return 0
 156     }
 157
 158     return 1
 159 }
 160
 161 set fails 0
 162
 163 # Create the object files, libraries and executables.
 164 if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
 165     fail "Could not create a PIC object file"
 166     set fails [expr $fails + 1]
 167 }
 168 if ![ld_compile "$CC -c $NOPIE_CFLAGS" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
 169     fail "Could not create a non-PIC object file"
 170     set fails [expr $fails + 1]
 171 }
 172 if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
 173     fail "Could not create a PIC object file containing an IFUNC symbol"
 174     set fails [expr $fails + 1]
 175 }
 176 if ![ld_compile "$CC -c $NOPIE_CFLAGS -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
 177     fail "Could not create a non-PIC object file containing an IFUNC symbol"
 178     set fails [expr $fails + 1]
 179 }
 180 if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
 181     fail "Could not create an ordinary non-PIC object file"
 182     set fails [expr $fails + 1]
 183 }
 184 if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
 185     fail "Could not create an empty object file"
 186     set fails [expr $fails + 1]
 187 }
 188 if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
 189     fail "Could not create test-1.o"
 190     set fails [expr $fails + 1]
 191 }
 192 if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
 193     fail "Could not create test-2.o"
 194     set fails [expr $fails + 1]
 195 }
 196
 197 if { $fails != 0 } {
 198     return
 199 }
 200
 201 if ![ld_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
 202     fail "Could not create a shared library containing an IFUNC symbol"
 203     set fails [expr $fails + 1]
 204 }
 205 if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
 206     fail "Could not create a static library containing an IFUNC symbol"
 207     set fails [expr $fails + 1]
 208 }
 209
 210 if { $fails != 0 } {
 211     return
 212 }
 213
 214 if ![ld_link $CC "tmpdir/dynamic_prog" "-Wl,--no-as-needed,-rpath=./tmpdir,-Bdynamic -Ltmpdir tmpdir/shared_prog.o -lshared_ifunc"] {
 215     fail "Could not link a dynamic executable"
 216     set fails [expr $fails + 1]
 217 }
 218 if ![ld_link $CC "tmpdir/local_prog" "$NOPIE_LDFLAGS -Wl,--no-as-needed,-rpath=./tmpdir -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 219     fail "Could not link a dynamic executable using local ifunc"
 220     set fails [expr $fails + 1]
 221 }
 222 if ![string match "" $STATIC_LDFLAGS] {
 223     if ![ld_link $CC "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 224         fail "Could not link a static executable"
 225         set fails [expr $fails + 1]
 226     }
 227     if ![ld_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
 228         fail "Could not link a non-ifunc using static executable"
 229         set fails [expr $fails + 1]
 230     }
 231 }
 232 if ![ld_link $CC "tmpdir/test-1" "-Wl,--no-as-needed,-rpath=./tmpdir tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
 233     fail "Could not link test-1"
 234     set fails [expr $fails + 1]
 235 }
 236 if ![ld_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
 237     fail "Could not link libtest-2.so"
 238     set fails [expr $fails + 1]
 239 }
 240 if ![ld_link $ld "tmpdir/libtest-2-now.so" "-shared -z now tmpdir/test-2.o"] {
 241     fail "Could not link libtest-2-now.so"
 242     set fails [expr $fails + 1]
 243 }
 244
 245 if { $fails == 0 } {
 246   pass "Building ifunc binaries"
 247   set fails 0
 248 } else {
 249     return
 250 }
 251
 252 # Check the executables and shared libraries
 253 #
 254 # The linked ifunc using executables and the shared library containing
 255 # ifunc should have an OSABI field of GNU.  The linked non-ifunc using
 256 # executable should have an OSABI field of NONE (aka System V).
 257
 258 case $target_triplet in {
 259     { hppa*-*-linux* } { set expected_none {UNIX - GNU} }
 260     default { set expected_none {UNIX - System V} }
 261 }
 262
 263 if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
 264     fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
 265     set fails [expr $fails + 1]
 266 }
 267 if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
 268     fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
 269     set fails [expr $fails + 1]
 270 }
 271 if { ![string match "" $STATIC_LDFLAGS] \
 272      && ![check_osabi tmpdir/static_prog {UNIX - GNU}]} {
 273     fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
 274     set fails [expr $fails + 1]
 275 }
 276 if {! [check_osabi tmpdir/dynamic_prog $expected_none]} {
 277     fail "Dynamic ifunc-using executable does not have an OS/ABI field of $expected_none"
 278     set fails [expr $fails + 1]
 279 }
 280 if {! [check_osabi tmpdir/static_nonifunc_prog $expected_none]} {
 281     fail "Static non-ifunc-using executable does not have an OS/ABI field of $expected_none"
 282     set fails [expr $fails + 1]
 283 }
 284
 285 # The linked ifunc using executables and the shared library containing
 286 # ifunc should contain an IFUNC symbol.  The non-ifunc using executable
 287 # should not.
 288
 289 if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
 290     fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
 291     set fails [expr $fails + 1]
 292 }
 293 if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
 294     fail "Local ifunc-using executable does not contain an IFUNC symbol"
 295     set fails [expr $fails + 1]
 296 }
 297 if { ![string match "" $STATIC_LDFLAGS] \
 298      && [contains_ifunc_symbol tmpdir/static_prog] != 1} {
 299     fail "Static ifunc-using executable does not contain an IFUNC symbol"
 300     set fails [expr $fails + 1]
 301 }
 302 if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
 303     fail "Dynamic ifunc-using executable contains an IFUNC symbol"
 304     set fails [expr $fails + 1]
 305 }
 306 if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
 307     fail "Static non-ifunc-using executable contains an IFUNC symbol"
 308     set fails [expr $fails + 1]
 309 }
 310 if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
 311     fail "test-1 contains IFUNC symbols"
 312     set fails [expr $fails + 1]
 313 }
 314 if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
 315     fail "libtest-2.so contains IFUNC symbols"
 316     set fails [expr $fails + 1]
 317 }
 318 if {[contains_ifunc_symbol tmpdir/libtest-2-now.so] != 0} {
 319     fail "libtest-2-now.so contains IFUNC symbols"
 320     set fails [expr $fails + 1]
 321 }
 322
 323 # The linked ifunc using executables and shared libraries should contain
 324 # a dynamic reloc referencing the IFUNC symbol.  (Even the static
 325 # executable which should have a dynamic section created for it).  The
 326 # non-ifunc using executable should not.
 327
 328 if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
 329     fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
 330     set fails [expr $fails + 1]
 331 }
 332 if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
 333     fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
 334     set fails [expr $fails + 1]
 335 }
 336 if { ![string match "" $STATIC_LDFLAGS] \
 337     && [contains_irelative_reloc tmpdir/static_prog] != 1} {
 338     fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
 339     set fails [expr $fails + 1]
 340 }
 341 if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
 342     fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
 343     set fails [expr $fails + 1]
 344 }
 345 if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
 346     fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
 347     set fails [expr $fails + 1]
 348 }
 349
 350 if { $fails == 0 } {
 351   pass "Checking ifunc binaries"
 352 }
 353
 354 run_cc_link_tests [list \
 355     [list \
 356         "Build libpr16467a.so" \
 357         "-shared -Wl,--version-script=pr16467a.map" \
 358         "-fPIC" \
 359         { pr16467a.c } \
 360         {} \
 361         "libpr16467a.so" \
 362     ] \
 363     [list \
 364         "Build libpr16467b.a" \
 365         "" \
 366         "-fPIC" \
 367         { pr16467b.c } \
 368         {} \
 369         "libpr16467b.a" \
 370     ] \
 371     [list \
 372         "Build libpr16467b.so" \
 373         "-shared tmpdir/pr16467b.o tmpdir/libpr16467a.so \
 374          -Wl,--version-script=pr16467b.map" \
 375         "-fPIC" \
 376         { dummy.c } \
 377         {} \
 378         "libpr16467b.so" \
 379     ] \
 380     [list \
 381         "Build libpr16467c.a" \
 382         "" \
 383         "" \
 384         { pr16467c.c } \
 385         {} \
 386         "libpr16467c.a" \
 387     ] \
 388     [list \
 389         "Build libpr16467an.so" \
 390         "-shared -Wl,-z,now -Wl,--version-script=pr16467a.map" \
 391         "-fPIC" \
 392         { pr16467a.c } \
 393         {} \
 394         "libpr16467an.so" \
 395     ] \
 396     [list \
 397         "Build libpr16467bn.so" \
 398         "-shared tmpdir/pr16467b.o tmpdir/libpr16467an.so \
 399          -Wl,--version-script=pr16467b.map" \
 400         "-fPIC" \
 401         { dummy.c } \
 402         {} \
 403         "libpr16467bn.so" \
 404     ] \
 405 ]
 406
 407 run_ld_link_exec_tests [list \
 408     [list \
 409         "Common symbol override ifunc test 1a" \
 410         "-static" \
 411         "" \
 412         { ifunc-common-1a.c ifunc-common-1b.c } \
 413         "ifunc-common-1a" \
 414         "ifunc-common-1.out" \
 415         "-g" \
 416     ] \
 417     [list \
 418         "Common symbol override ifunc test 1b" \
 419         "-static" \
 420         "" \
 421         { ifunc-common-1b.c ifunc-common-1a.c } \
 422         "ifunc-common-1b" \
 423         "ifunc-common-1.out" \
 424         "-g" \
 425     ] \
 426 ]
 427
 428 set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
 429 foreach t $test_list {
 430     # We need to strip the ".d", but can leave the dirname.
 431     verbose [file rootname $t]
 432     run_dump_test [file rootname $t]
 433 }
 434
 435 # Run-time tests which require working IFUNC support.
 436 if { ![check_ifunc_available] } {
 437     return
 438 }
 439
 440 run_cc_link_tests [list \
 441     [list \
 442         "Build ifunc-lib.so" \
 443         "-shared" \
 444         "-fPIC" \
 445         { ifunc-lib.c } \
 446         {} \
 447         "libifunc-lib.so" \
 448     ] \
 449     [list \
 450         "Build ifunc-libn.so" \
 451         "-shared -Wl,-z,now" \
 452         "-fPIC" \
 453         { ifunc-lib.c } \
 454         {} \
 455         "libifunc-libn.so" \
 456     ] \
 457 ]
 458
 459 run_ld_link_exec_tests [list \
 460     [list \
 461         "Run pr16467" \
 462         "-Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467b.so tmpdir/libpr16467a.so" \
 463         "" \
 464         { dummy.c } \
 465         "pr16467" \
 466         "pr16467.out" \
 467         "" \
 468     ] \
 469     [list \
 470         "Run pr16467 (-z now)" \
 471         "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467bn.so tmpdir/libpr16467an.so" \
 472         "" \
 473         { dummy.c } \
 474         "pr16467n" \
 475         "pr16467.out" \
 476         "" \
 477     ] \
 478     [list \
 479         "Run ifunc-main" \
 480         "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
 481         "" \
 482         { ifunc-main.c } \
 483         "ifunc-main" \
 484         "ifunc-main.out" \
 485     ] \
 486     [list \
 487         "Run ifunc-main with -fpic" \
 488         "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
 489         "" \
 490         { ifunc-main.c } \
 491         "ifunc-main" \
 492         "ifunc-main.out" \
 493         "-fpic" \
 494     ] \
 495     [list \
 496         "Run ifunc-main (-z now)" \
 497         "-Wl,-z,now -Wl,--no-as-needed tmpdir/libifunc-libn.so" \
 498         "" \
 499         { ifunc-main.c } \
 500         "ifunc-mainn" \
 501         "ifunc-main.out" \
 502     ] \
 503     [list \
 504         "Run ifunc-main with PIE (-z now)" \
 505         "-pie -Wl,-z,now -Wl,--no-as-needed tmpdir/libifunc-libn.so" \
 506         "" \
 507         { ifunc-main.c } \
 508         "ifunc-mainpn" \
 509         "ifunc-main.out" \
 510         "-fpie" \
 511     ] \
 512 ]
 513
 514 # Run-time tests which require working ifunc attribute support.
 515 if { ![check_ifunc_attribute_available] } {
 516     return
 517 }
 518
 519 run_cc_link_tests [list \
 520     [list \
 521         "Build pr18808a.o" \
 522         "" \
 523         "" \
 524         { pr18808a.c } \
 525         "" \
 526         "" \
 527     ] \
 528     [list \
 529         "Build libpr18808.so" \
 530         "-shared" \
 531         "-fPIC -O2 -g" \
 532         { pr18808b.c } \
 533         {} \
 534         "libpr18808.so" \
 535     ] \
 536     [list \
 537         "Build libpr18808n.so" \
 538         "-shared -Wl,-z,now" \
 539         "-fPIC -O2 -g" \
 540         { pr18808b.c } \
 541         {} \
 542         "libpr18808n.so" \
 543     ] \
 544     [list \
 545         "Build pr18841a.o" \
 546         "" \
 547         "" \
 548         { pr18841a.c } \
 549         "" \
 550         "" \
 551     ] \
 552     [list \
 553         "Build libpr18841b.so" \
 554         "-shared" \
 555         "-fPIC -O0 -g" \
 556         { pr18841b.c } \
 557         {} \
 558         "libpr18841b.so" \
 559     ] \
 560     [list \
 561         "Build libpr18841c.so" \
 562         "-shared" \
 563         "-fPIC -O0 -g" \
 564         { pr18841c.c } \
 565         {} \
 566         "libpr18841c.so" \
 567     ] \
 568     [list \
 569         "Build libpr18841bn.so" \
 570         "-Wl,-z,now -shared" \
 571         "-fPIC -O0 -g" \
 572         { pr18841b.c } \
 573         {} \
 574         "libpr18841bn.so" \
 575     ] \
 576     [list \
 577         "Build libpr18841cn.so" \
 578         "-shared" \
 579         "-Wl,-z,now -fPIC -O0 -g" \
 580         { pr18841c.c } \
 581         {} \
 582         "libpr18841cn.so" \
 583     ] \
 584 ]
 585
 586 run_ld_link_exec_tests [list \
 587     [list \
 588         "Run pr18808" \
 589         "-Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808.so" \
 590         "" \
 591         { dummy.c } \
 592         "pr18808" \
 593         "pr18808.out" \
 594     ] \
 595     [list \
 596         "Run pr18808 (-z now)" \
 597         "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808n.so" \
 598         "" \
 599         { dummy.c } \
 600         "pr18808n" \
 601         "pr18808.out" \
 602     ] \
 603     [list \
 604         "Run pr18841 with libpr18841b.so" \
 605         "-Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841b.so" \
 606         "" \
 607         { dummy.c } \
 608         "pr18841b" \
 609         "pr18841.out" \
 610     ] \
 611     [list \
 612         "Run pr18841 with libpr18841c.so" \
 613         "-Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841c.so" \
 614         "" \
 615         { dummy.c } \
 616         "pr18841c" \
 617         "pr18841.out" \
 618     ] \
 619     [list \
 620         "Run pr18841 with libpr18841bn.so (-z now)" \
 621         "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841bn.so" \
 622         "" \
 623         { dummy.c } \
 624         "pr18841bn" \
 625         "pr18841.out" \
 626     ] \
 627     [list \
 628         "Run pr18841 with libpr18841cn.so (-z now)" \
 629         "-Wl,-z,now -Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841cn.so" \
 630         "" \
 631         { dummy.c } \
 632         "pr18841cn" \
 633         "pr18841.out" \
 634     ] \
 635 ]