ld/testsuite/ld-ifunc/ifunc.exp

   1 # Expect script for linker support of IFUNC symbols and relocations.
   2 #
   3 #   Copyright (C) 2009-2017 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               && ![istarget "*-*-*aout*"]
  39               && ![istarget "*-*-*oldld*"]))) } {
  40     verbose "IFUNC tests not run - target does not support IFUNC"
  41     return
  42 }
  43
  44 # We need a working compiler.  (Strictly speaking this is
  45 # not true, we could use target specific assembler files).
  46 if { [which $CC] == 0 } {
  47     verbose "IFUNC tests not run - no compiler available"
  48     return
  49 }
  50
  51 # A procedure to check the OS/ABI field in the ELF header of a binary file.
  52 proc check_osabi { binary_file expected_osabi } {
  53     global READELF
  54     global READELFFLAGS
  55
  56     catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
  57
  58     if ![string match "" $got] then {
  59         verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
  60         return 0
  61     }
  62
  63     if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
  64            [file_contents readelf.out] nil osabi] } {
  65         verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
  66         return 0
  67     }
  68
  69     if { $osabi == $expected_osabi } {
  70         return 1
  71     }
  72
  73     verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
  74
  75     return 0
  76 }
  77
  78 # A procedure to confirm that a file contains the IFUNC symbol.
  79 # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
  80 proc contains_ifunc_symbol { binary_file } {
  81     global READELF
  82     global READELFFLAGS
  83
  84     catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
  85
  86     if ![string match "" $got] then {
  87         verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got"
  88         return -1
  89     }
  90
  91     # Look for a line like this:
  92     #    58: 0000000000400600    30 IFUNC   GLOBAL DEFAULT   12 library_func2
  93     # with perhaps some other info between the visibility and section
  94
  95     if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT .* \[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
  96         return 0
  97     }
  98
  99     return 1
 100 }
 101
 102 # A procedure to confirm that a file contains the R_*_IRELATIVE
 103 # relocation.
 104 # Returns -1 upon error, 0 if the relocation was not found and 1 if
 105 # it was found.
 106 proc contains_irelative_reloc { binary_file } {
 107     global READELF
 108     global READELFFLAGS
 109
 110     catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
 111
 112     if ![string match "" $got] then {
 113         verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
 114         return -1
 115     }
 116
 117     # Look for a line like this:
 118     #    0000000000600ab0  0000000000000025 R_X86_64_IRELATIVE      000000000040061c
 119     #    080496f4  0000002a R_386_IRELATIVE
 120
 121
 122     if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
 123         return 0
 124     }
 125
 126     return 1
 127 }
 128
 129 # A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
 130 # Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
 131 proc contains_ifunc_reloc { binary_file } {
 132     global READELF
 133     global READELFFLAGS
 134
 135     catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
 136
 137     if ![string match "" $got] then {
 138         verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
 139         return -1
 140     }
 141
 142     if [string match "" [file_contents readelf.out]] then {
 143         verbose "No relocs found in $binary_file"
 144         return 0
 145     }
 146
 147     if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
 148         return 0
 149     }
 150
 151     return 1
 152 }
 153
 154 set fails 0
 155
 156 # Create the object files, libraries and executables.
 157 if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
 158     fail "Could not create a PIC object file"
 159     set fails [expr $fails + 1]
 160 }
 161 if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
 162     fail "Could not create a non-PIC object file"
 163     set fails [expr $fails + 1]
 164 }
 165 if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
 166     fail "Could not create a PIC object file containing an IFUNC symbol"
 167     set fails [expr $fails + 1]
 168 }
 169 if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
 170     fail "Could not create a non-PIC object file containing an IFUNC symbol"
 171     set fails [expr $fails + 1]
 172 }
 173 if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
 174     fail "Could not create an ordinary non-PIC object file"
 175     set fails [expr $fails + 1]
 176 }
 177 if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
 178     fail "Could not create an empty object file"
 179     set fails [expr $fails + 1]
 180 }
 181 if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
 182     fail "Could not create test-1.o"
 183     set fails [expr $fails + 1]
 184 }
 185 if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
 186     fail "Could not create test-2.o"
 187     set fails [expr $fails + 1]
 188 }
 189
 190 if { $fails != 0 } {
 191     return
 192 }
 193
 194 if ![ld_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
 195     fail "Could not create a shared library containing an IFUNC symbol"
 196     set fails [expr $fails + 1]
 197 }
 198 if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
 199     fail "Could not create a static library containing an IFUNC symbol"
 200     set fails [expr $fails + 1]
 201 }
 202
 203 if { $fails != 0 } {
 204     return
 205 }
 206
 207 if ![ld_link $CC "tmpdir/dynamic_prog" "-Wl,--no-as-needed,-rpath=./tmpdir,-Bdynamic -Ltmpdir tmpdir/shared_prog.o -lshared_ifunc"] {
 208     fail "Could not link a dynamic executable"
 209     set fails [expr $fails + 1]
 210 }
 211 if ![ld_link $CC "tmpdir/local_prog" "-Wl,--no-as-needed,-rpath=./tmpdir -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 212     fail "Could not link a dynamic executable using local ifunc"
 213     set fails [expr $fails + 1]
 214 }
 215 if ![ld_link $CC "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 216     fail "Could not link a static executable"
 217     set fails [expr $fails + 1]
 218 }
 219 if ![ld_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
 220     fail "Could not link a non-ifunc using static executable"
 221     set fails [expr $fails + 1]
 222 }
 223 if ![ld_link $CC "tmpdir/test-1" "-Wl,--no-as-needed,-rpath=./tmpdir tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
 224     fail "Could not link test-1"
 225     set fails [expr $fails + 1]
 226 }
 227 if ![ld_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
 228     fail "Could not link libtest-2.so"
 229     set fails [expr $fails + 1]
 230 }
 231
 232 if { $fails == 0 } {
 233   pass "Building ifunc binaries"
 234   set fails 0
 235 } else {
 236     return
 237 }
 238
 239 # Check the executables and shared libraries
 240 #
 241 # The linked ifunc using executables and the shared library containing
 242 # ifunc should have an OSABI field of GNU.  The linked non-ifunc using
 243 # executable should have an OSABI field of NONE (aka System V).
 244
 245 case $target_triplet in {
 246     { hppa*-*-linux* } { set expected_none {UNIX - GNU} }
 247     default { set expected_none {UNIX - System V} }
 248 }
 249
 250 if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
 251     fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
 252     set fails [expr $fails + 1]
 253 }
 254 if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
 255     fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
 256     set fails [expr $fails + 1]
 257 }
 258 if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} {
 259     fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
 260     set fails [expr $fails + 1]
 261 }
 262 if {! [check_osabi tmpdir/dynamic_prog $expected_none]} {
 263     fail "Dynamic ifunc-using executable does not have an OS/ABI field of $expected_none"
 264     set fails [expr $fails + 1]
 265 }
 266 if {! [check_osabi tmpdir/static_nonifunc_prog $expected_none]} {
 267     fail "Static non-ifunc-using executable does not have an OS/ABI field of $expected_none"
 268     set fails [expr $fails + 1]
 269 }
 270
 271 # The linked ifunc using executables and the shared library containing
 272 # ifunc should contain an IFUNC symbol.  The non-ifunc using executable
 273 # should not.
 274
 275 if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
 276     fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
 277     set fails [expr $fails + 1]
 278 }
 279 if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
 280     fail "Local ifunc-using executable does not contain an IFUNC symbol"
 281     set fails [expr $fails + 1]
 282 }
 283 if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
 284     fail "Static ifunc-using executable does not contain an IFUNC symbol"
 285     set fails [expr $fails + 1]
 286 }
 287 if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
 288     fail "Dynamic ifunc-using executable contains an IFUNC symbol"
 289     set fails [expr $fails + 1]
 290 }
 291 if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
 292     fail "Static non-ifunc-using executable contains an IFUNC symbol"
 293     set fails [expr $fails + 1]
 294 }
 295 if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
 296     fail "test-1 contains IFUNC symbols"
 297     set fails [expr $fails + 1]
 298 }
 299 if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
 300     fail "libtest-2.so contains IFUNC symbols"
 301     set fails [expr $fails + 1]
 302 }
 303
 304 # The linked ifunc using executables and shared libraries should contain
 305 # a dynamic reloc referencing the IFUNC symbol.  (Even the static
 306 # executable which should have a dynamic section created for it).  The
 307 # non-ifunc using executable should not.
 308
 309 if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
 310     fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
 311     set fails [expr $fails + 1]
 312 }
 313 if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
 314     fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
 315     set fails [expr $fails + 1]
 316 }
 317 if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
 318     fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
 319     set fails [expr $fails + 1]
 320 }
 321 if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
 322     fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
 323     set fails [expr $fails + 1]
 324 }
 325 if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
 326     fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
 327     set fails [expr $fails + 1]
 328 }
 329
 330 if { $fails == 0 } {
 331   pass "Checking ifunc binaries"
 332 }
 333
 334 run_cc_link_tests [list \
 335     [list \
 336         "Build libpr16467a.so" \
 337         "-shared -Wl,--version-script=pr16467a.map" \
 338         "-fPIC" \
 339         { pr16467a.c } \
 340         {} \
 341         "libpr16467a.so" \
 342     ] \
 343     [list \
 344         "Build libpr16467b.a" \
 345         "" \
 346         "-fPIC" \
 347         { pr16467b.c } \
 348         {} \
 349         "libpr16467b.a" \
 350     ] \
 351     [list \
 352         "Build libpr16467b.so" \
 353         "-shared tmpdir/pr16467b.o tmpdir/libpr16467a.so \
 354          -Wl,--version-script=pr16467b.map" \
 355         "-fPIC" \
 356         { dummy.c } \
 357         {} \
 358         "libpr16467b.so" \
 359     ] \
 360     [list \
 361         "Build libpr16467c.a" \
 362         "" \
 363         "" \
 364         { pr16467c.c } \
 365         {} \
 366         "libpr16467c.a" \
 367     ] \
 368 ]
 369
 370 run_ld_link_exec_tests [list \
 371     [list \
 372         "Common symbol override ifunc test 1a" \
 373         "-static" \
 374         "" \
 375         { ifunc-common-1a.c ifunc-common-1b.c } \
 376         "ifunc-common-1a" \
 377         "ifunc-common-1.out" \
 378         "-g" \
 379     ] \
 380     [list \
 381         "Common symbol override ifunc test 1b" \
 382         "-static" \
 383         "" \
 384         { ifunc-common-1b.c ifunc-common-1a.c } \
 385         "ifunc-common-1b" \
 386         "ifunc-common-1.out" \
 387         "-g" \
 388     ] \
 389 ]
 390
 391 set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
 392 foreach t $test_list {
 393     # We need to strip the ".d", but can leave the dirname.
 394     verbose [file rootname $t]
 395     run_dump_test [file rootname $t]
 396 }
 397
 398 # Run-time tests which require working IFUNC support.
 399 if { ![check_ifunc_available] } {
 400     return
 401 }
 402
 403 run_cc_link_tests [list \
 404     [list \
 405         "Build ifunc-lib.so" \
 406         "-shared" \
 407         "-fPIC" \
 408         { ifunc-lib.c } \
 409         {} \
 410         "libifunc-lib.so" \
 411     ] \
 412 ]
 413
 414 run_ld_link_exec_tests [list \
 415     [list \
 416         "Run pr16467" \
 417         "-Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467b.so tmpdir/libpr16467a.so" \
 418         "" \
 419         { dummy.c } \
 420         "pr16467" \
 421         "pr16467.out" \
 422         "" \
 423     ] \
 424     [list \
 425         "Run ifunc-main" \
 426         "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
 427         "" \
 428         { ifunc-main.c } \
 429         "ifunc-main" \
 430         "ifunc-main.out" \
 431     ] \
 432     [list \
 433         "Run ifunc-main with -fpic" \
 434         "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
 435         "" \
 436         { ifunc-main.c } \
 437         "ifunc-main" \
 438         "ifunc-main.out" \
 439         "-fpic" \
 440     ] \
 441 ]
 442
 443 # Run-time tests which require working ifunc attribute support.
 444 if { ![check_ifunc_attribute_available] } {
 445     return
 446 }
 447
 448 run_cc_link_tests [list \
 449     [list \
 450         "Build pr18808a.o" \
 451         "" \
 452         "" \
 453         { pr18808a.c } \
 454         "" \
 455         "" \
 456     ] \
 457     [list \
 458         "Build libpr18808.so" \
 459         "-shared" \
 460         "-fPIC -O2 -g" \
 461         { pr18808b.c } \
 462         {} \
 463         "libpr18808.so" \
 464     ] \
 465     [list \
 466         "Build pr18841a.o" \
 467         "" \
 468         "" \
 469         { pr18841a.c } \
 470         "" \
 471         "" \
 472     ] \
 473     [list \
 474         "Build libpr18841b.so" \
 475         "-shared" \
 476         "-fPIC -O0 -g" \
 477         { pr18841b.c } \
 478         {} \
 479         "libpr18841b.so" \
 480     ] \
 481     [list \
 482         "Build libpr18841c.so" \
 483         "-shared" \
 484         "-fPIC -O0 -g" \
 485         { pr18841c.c } \
 486         {} \
 487         "libpr18841c.so" \
 488     ] \
 489 ]
 490
 491 run_ld_link_exec_tests [list \
 492     [list \
 493         "Run pr18808" \
 494         "-Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808.so" \
 495         "" \
 496         { dummy.c } \
 497         "pr18808" \
 498         "pr18808.out" \
 499     ] \
 500     [list \
 501         "Run pr18841 with libpr18841b.so" \
 502         "-Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841b.so" \
 503         "" \
 504         { dummy.c } \
 505         "pr18841b" \
 506         "pr18841.out" \
 507     ] \
 508     [list \
 509         "Run pr18841 with libpr18841c.so" \
 510         "-Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841c.so" \
 511         "" \
 512         { dummy.c } \
 513         "pr18841c" \
 514         "pr18841.out" \
 515     ] \
 516 ]