| 1 | # Expect script for linker support of IFUNC symbols and relocations. |
| 2 | # |
| 3 | # Copyright (C) 2009-2015 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 and sparc so far. |
| 28 | if {!(([istarget "i?86-*-*"] |
| 29 | || [istarget "x86_64-*-*"] |
| 30 | || [istarget "powerpc*-*-*"] |
| 31 | || [istarget "aarch64*-*-*"] |
| 32 | || [istarget "sparc*-*-*"]) |
| 33 | && ([istarget "*-*-elf*"] |
| 34 | || [istarget "*-*-nacl*"] |
| 35 | || (([istarget "*-*-linux*"] |
| 36 | || [istarget "*-*-gnu*"]) |
| 37 | && ![istarget "*-*-*aout*"] |
| 38 | && ![istarget "*-*-*oldld*"]))) } { |
| 39 | verbose "IFUNC tests not run - target does not support IFUNC" |
| 40 | return |
| 41 | } |
| 42 | |
| 43 | # We need a native system. FIXME: Strictly speaking this |
| 44 | # is not true, we just need to know how to create a fully |
| 45 | # linked executable, including the C and Z libraries, using |
| 46 | # the linker that is under test. |
| 47 | if ![isnative] { |
| 48 | verbose "IFUNC tests not run - not a native toolchain" |
| 49 | return |
| 50 | } |
| 51 | |
| 52 | # We need a working compiler. (Strictly speaking this is |
| 53 | # not true, we could use target specific assembler files). |
| 54 | if { [which $CC] == 0 } { |
| 55 | verbose "IFUNC tests not run - no compiler available" |
| 56 | return |
| 57 | } |
| 58 | |
| 59 | # A procedure to check the OS/ABI field in the ELF header of a binary file. |
| 60 | proc check_osabi { binary_file expected_osabi } { |
| 61 | global READELF |
| 62 | global READELFFLAGS |
| 63 | |
| 64 | catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got |
| 65 | |
| 66 | if ![string match "" $got] then { |
| 67 | verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got" |
| 68 | return 0 |
| 69 | } |
| 70 | |
| 71 | if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \ |
| 72 | [file_contents readelf.out] nil osabi] } { |
| 73 | verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file" |
| 74 | return 0 |
| 75 | } |
| 76 | |
| 77 | if { $osabi == $expected_osabi } { |
| 78 | return 1 |
| 79 | } |
| 80 | |
| 81 | verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi" |
| 82 | |
| 83 | return 0 |
| 84 | } |
| 85 | |
| 86 | # A procedure to confirm that a file contains the IFUNC symbol. |
| 87 | # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found. |
| 88 | proc contains_ifunc_symbol { binary_file } { |
| 89 | global READELF |
| 90 | global READELFFLAGS |
| 91 | |
| 92 | catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got |
| 93 | |
| 94 | if ![string match "" $got] then { |
| 95 | verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got" |
| 96 | return -1 |
| 97 | } |
| 98 | |
| 99 | # Look for a line like this: |
| 100 | # 58: 0000000000400600 30 IFUNC GLOBAL DEFAULT 12 library_func2 |
| 101 | # with perhaps some other info between the visibility and section |
| 102 | |
| 103 | if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT .* \[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } { |
| 104 | return 0 |
| 105 | } |
| 106 | |
| 107 | return 1 |
| 108 | } |
| 109 | |
| 110 | # A procedure to confirm that a file contains the R_*_IRELATIVE |
| 111 | # relocation. |
| 112 | # Returns -1 upon error, 0 if the relocation was not found and 1 if |
| 113 | # it was found. |
| 114 | proc contains_irelative_reloc { binary_file } { |
| 115 | global READELF |
| 116 | global READELFFLAGS |
| 117 | |
| 118 | catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got |
| 119 | |
| 120 | if ![string match "" $got] then { |
| 121 | verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got" |
| 122 | return -1 |
| 123 | } |
| 124 | |
| 125 | # Look for a line like this: |
| 126 | # 0000000000600ab0 0000000000000025 R_X86_64_IRELATIVE 000000000040061c |
| 127 | # 080496f4 0000002a R_386_IRELATIVE |
| 128 | |
| 129 | |
| 130 | if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } { |
| 131 | return 0 |
| 132 | } |
| 133 | |
| 134 | return 1 |
| 135 | } |
| 136 | |
| 137 | # A procedure to confirm that a file contains a relocation that references an IFUNC symbol. |
| 138 | # Returns -1 upon error, 0 if the reloc was not found and 1 if it was found. |
| 139 | proc contains_ifunc_reloc { binary_file } { |
| 140 | global READELF |
| 141 | global READELFFLAGS |
| 142 | |
| 143 | catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got |
| 144 | |
| 145 | if ![string match "" $got] then { |
| 146 | verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got" |
| 147 | return -1 |
| 148 | } |
| 149 | |
| 150 | if [string match "" [file_contents readelf.out]] then { |
| 151 | verbose "No relocs found in $binary_file" |
| 152 | return 0 |
| 153 | } |
| 154 | |
| 155 | if { ![regexp "\\(\\)" [file_contents readelf.out]] } { |
| 156 | return 0 |
| 157 | } |
| 158 | |
| 159 | return 1 |
| 160 | } |
| 161 | |
| 162 | set fails 0 |
| 163 | |
| 164 | # Create the object files, libraries and executables. |
| 165 | if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] { |
| 166 | fail "Could not create a PIC object file" |
| 167 | set fails [expr $fails + 1] |
| 168 | } |
| 169 | if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] { |
| 170 | fail "Could not create a non-PIC object file" |
| 171 | set fails [expr $fails + 1] |
| 172 | } |
| 173 | if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] { |
| 174 | fail "Could not create a PIC object file containing an IFUNC symbol" |
| 175 | set fails [expr $fails + 1] |
| 176 | } |
| 177 | if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] { |
| 178 | fail "Could not create a non-PIC object file containing an IFUNC symbol" |
| 179 | set fails [expr $fails + 1] |
| 180 | } |
| 181 | if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] { |
| 182 | fail "Could not create an ordinary non-PIC object file" |
| 183 | set fails [expr $fails + 1] |
| 184 | } |
| 185 | if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] { |
| 186 | fail "Could not create an empty object file" |
| 187 | set fails [expr $fails + 1] |
| 188 | } |
| 189 | if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] { |
| 190 | fail "Could not create test-1.o" |
| 191 | set fails [expr $fails + 1] |
| 192 | } |
| 193 | if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] { |
| 194 | fail "Could not create test-2.o" |
| 195 | set fails [expr $fails + 1] |
| 196 | } |
| 197 | |
| 198 | if { $fails != 0 } { |
| 199 | return |
| 200 | } |
| 201 | |
| 202 | if ![ld_simple_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] { |
| 203 | fail "Could not create a shared library containing an IFUNC symbol" |
| 204 | set fails [expr $fails + 1] |
| 205 | } |
| 206 | if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] { |
| 207 | fail "Could not create a static library containing an IFUNC symbol" |
| 208 | set fails [expr $fails + 1] |
| 209 | } |
| 210 | |
| 211 | if { $fails != 0 } { |
| 212 | return |
| 213 | } |
| 214 | |
| 215 | if ![default_ld_link $ld "tmpdir/dynamic_prog" "-Ltmpdir tmpdir/shared_prog.o -Bdynamic -lshared_ifunc -rpath ./tmpdir"] { |
| 216 | fail "Could not link a dynamic executable" |
| 217 | set fails [expr $fails + 1] |
| 218 | } |
| 219 | if ![default_ld_link $ld "tmpdir/local_prog" "-Ltmpdir tmpdir/static_prog.o -lifunc"] { |
| 220 | fail "Could not link a dynamic executable using local ifunc" |
| 221 | set fails [expr $fails + 1] |
| 222 | } |
| 223 | if ![default_ld_link $ld "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_simple_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 | if ![default_ld_link $ld "tmpdir/test-1" "tmpdir/test-1.o tmpdir/libshared_ifunc.so"] { |
| 232 | fail "Could not link test-1" |
| 233 | set fails [expr $fails + 1] |
| 234 | } |
| 235 | if ![ld_simple_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] { |
| 236 | fail "Could not link libtest-2.so" |
| 237 | set fails [expr $fails + 1] |
| 238 | } |
| 239 | |
| 240 | if { $fails == 0 } { |
| 241 | pass "Building ifunc binaries" |
| 242 | set fails 0 |
| 243 | } else { |
| 244 | return |
| 245 | } |
| 246 | |
| 247 | # Check the executables and shared libraries |
| 248 | # |
| 249 | # The linked ifunc using executables and the shared library containing |
| 250 | # ifunc should have an OSABI field of GNU. The linked non-ifunc using |
| 251 | # executable should have an OSABI field of NONE (aka System V). |
| 252 | |
| 253 | if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} { |
| 254 | fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU" |
| 255 | set fails [expr $fails + 1] |
| 256 | } |
| 257 | if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} { |
| 258 | fail "Local ifunc-using executable does not have an OS/ABI field of GNU" |
| 259 | set fails [expr $fails + 1] |
| 260 | } |
| 261 | if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} { |
| 262 | fail "Static ifunc-using executable does not have an OS/ABI field of GNU" |
| 263 | set fails [expr $fails + 1] |
| 264 | } |
| 265 | if {! [check_osabi tmpdir/dynamic_prog {UNIX - System V}]} { |
| 266 | fail "Dynamic ifunc-using executable does not have an OS/ABI field of System V" |
| 267 | set fails [expr $fails + 1] |
| 268 | } |
| 269 | if {! [check_osabi tmpdir/static_nonifunc_prog {UNIX - System V}]} { |
| 270 | fail "Static non-ifunc-using executable does not have an OS/ABI field of System V" |
| 271 | set fails [expr $fails + 1] |
| 272 | } |
| 273 | |
| 274 | # The linked ifunc using executables and the shared library containing |
| 275 | # ifunc should contain an IFUNC symbol. The non-ifunc using executable |
| 276 | # should not. |
| 277 | |
| 278 | if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} { |
| 279 | fail "Shared libraries containing ifunc does not contain an IFUNC symbol" |
| 280 | set fails [expr $fails + 1] |
| 281 | } |
| 282 | if {[contains_ifunc_symbol tmpdir/local_prog] != 1} { |
| 283 | fail "Local ifunc-using executable does not contain an IFUNC symbol" |
| 284 | set fails [expr $fails + 1] |
| 285 | } |
| 286 | if {[contains_ifunc_symbol tmpdir/static_prog] != 1} { |
| 287 | fail "Static ifunc-using executable does not contain an IFUNC symbol" |
| 288 | set fails [expr $fails + 1] |
| 289 | } |
| 290 | if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} { |
| 291 | fail "Dynamic ifunc-using executable contains an IFUNC symbol" |
| 292 | set fails [expr $fails + 1] |
| 293 | } |
| 294 | if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} { |
| 295 | fail "Static non-ifunc-using executable contains an IFUNC symbol" |
| 296 | set fails [expr $fails + 1] |
| 297 | } |
| 298 | if {[contains_ifunc_symbol tmpdir/test-1] != 0} { |
| 299 | fail "test-1 contains IFUNC symbols" |
| 300 | set fails [expr $fails + 1] |
| 301 | } |
| 302 | if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} { |
| 303 | fail "libtest-2.so contains IFUNC symbols" |
| 304 | set fails [expr $fails + 1] |
| 305 | } |
| 306 | |
| 307 | # The linked ifunc using executables and shared libraries should contain |
| 308 | # a dynamic reloc referencing the IFUNC symbol. (Even the static |
| 309 | # executable which should have a dynamic section created for it). The |
| 310 | # non-ifunc using executable should not. |
| 311 | |
| 312 | if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} { |
| 313 | fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation" |
| 314 | set fails [expr $fails + 1] |
| 315 | } |
| 316 | if {[contains_irelative_reloc tmpdir/local_prog] != 1} { |
| 317 | fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation" |
| 318 | set fails [expr $fails + 1] |
| 319 | } |
| 320 | if {[contains_irelative_reloc tmpdir/static_prog] != 1} { |
| 321 | fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation" |
| 322 | set fails [expr $fails + 1] |
| 323 | } |
| 324 | if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} { |
| 325 | fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol" |
| 326 | set fails [expr $fails + 1] |
| 327 | } |
| 328 | if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} { |
| 329 | fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!" |
| 330 | set fails [expr $fails + 1] |
| 331 | } |
| 332 | |
| 333 | if { $fails == 0 } { |
| 334 | pass "Checking ifunc binaries" |
| 335 | } |
| 336 | |
| 337 | # Clean up, unless we are being verbose, in which case we leave the files available. |
| 338 | if { $verbose < 1 } { |
| 339 | remote_file host delete "tmpdir/shared_prog.o" |
| 340 | remote_file host delete "tmpdir/static_prog.o" |
| 341 | remote_file host delete "tmpdir/shared_ifunc.o" |
| 342 | remote_file host delete "tmpdir/static_ifunc.o" |
| 343 | remote_file host delete "tmpdir/static_noifunc.o" |
| 344 | remote_file host delete "tmpdir/libshared_ifunc.so" |
| 345 | remote_file host delete "tmpdir/libifunc.a" |
| 346 | remote_file host delete "tmpdir/dynamic_prog" |
| 347 | remote_file host delete "tmpdir/local_prog" |
| 348 | remote_file host delete "tmpdir/static_prog" |
| 349 | remote_file host delete "tmpdir/static_nonifunc_prog" |
| 350 | } |
| 351 | |
| 352 | run_cc_link_tests [list \ |
| 353 | [list \ |
| 354 | "Build libpr16467a.so" \ |
| 355 | "-shared -Wl,--version-script=pr16467a.map" \ |
| 356 | "-fPIC" \ |
| 357 | { pr16467a.c } \ |
| 358 | {} \ |
| 359 | "libpr16467a.so" \ |
| 360 | ] \ |
| 361 | [list \ |
| 362 | "Build libpr16467b.a" \ |
| 363 | "" \ |
| 364 | "-fPIC" \ |
| 365 | { pr16467b.c } \ |
| 366 | {} \ |
| 367 | "libpr16467b.a" \ |
| 368 | ] \ |
| 369 | [list \ |
| 370 | "Build libpr16467b.so" \ |
| 371 | "-shared tmpdir/pr16467b.o tmpdir/libpr16467a.so \ |
| 372 | -Wl,--version-script=pr16467b.map" \ |
| 373 | "-fPIC" \ |
| 374 | { dummy.c } \ |
| 375 | {} \ |
| 376 | "libpr16467b.so" \ |
| 377 | ] \ |
| 378 | [list \ |
| 379 | "Build libpr16467c.a" \ |
| 380 | "" \ |
| 381 | "" \ |
| 382 | { pr16467c.c } \ |
| 383 | {} \ |
| 384 | "libpr16467c.a" \ |
| 385 | ] \ |
| 386 | ] |
| 387 | |
| 388 | run_ld_link_exec_tests [] [list \ |
| 389 | [list \ |
| 390 | "Common symbol override ifunc test 1a" \ |
| 391 | "-static" \ |
| 392 | "" \ |
| 393 | { ifunc-common-1a.c ifunc-common-1b.c } \ |
| 394 | "ifunc-common-1a" \ |
| 395 | "ifunc-common-1.out" \ |
| 396 | "-g" \ |
| 397 | ] \ |
| 398 | [list \ |
| 399 | "Common symbol override ifunc test 1b" \ |
| 400 | "-static" \ |
| 401 | "" \ |
| 402 | { ifunc-common-1b.c ifunc-common-1a.c } \ |
| 403 | "ifunc-common-1b" \ |
| 404 | "ifunc-common-1.out" \ |
| 405 | "-g" \ |
| 406 | ] \ |
| 407 | ] |
| 408 | |
| 409 | set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]] |
| 410 | foreach t $test_list { |
| 411 | # We need to strip the ".d", but can leave the dirname. |
| 412 | verbose [file rootname $t] |
| 413 | run_dump_test [file rootname $t] |
| 414 | } |
| 415 | |
| 416 | # Run-time tests which require working IFUNC support. |
| 417 | if { ![check_ifunc_available] } { |
| 418 | return |
| 419 | } |
| 420 | |
| 421 | run_cc_link_tests [list \ |
| 422 | [list \ |
| 423 | "Build ifunc-lib.so" \ |
| 424 | "-shared" \ |
| 425 | "-fPIC" \ |
| 426 | { ifunc-lib.c } \ |
| 427 | {} \ |
| 428 | "libifunc-lib.so" \ |
| 429 | ] \ |
| 430 | ] |
| 431 | |
| 432 | run_ld_link_exec_tests [] [list \ |
| 433 | [list \ |
| 434 | "Run pr16467" \ |
| 435 | "tmpdir/pr16467c.o tmpdir/libpr16467b.so tmpdir/libpr16467a.so" \ |
| 436 | "" \ |
| 437 | { dummy.c } \ |
| 438 | "pr16467" \ |
| 439 | "pr16467.out" \ |
| 440 | "" \ |
| 441 | ] \ |
| 442 | [list \ |
| 443 | "Run ifunc-main" \ |
| 444 | "tmpdir/libifunc-lib.so" \ |
| 445 | "" \ |
| 446 | { ifunc-main.c } \ |
| 447 | "ifunc-main" \ |
| 448 | "ifunc-main.out" \ |
| 449 | ] \ |
| 450 | [list \ |
| 451 | "Run ifunc-main with -fpic" \ |
| 452 | "tmpdir/libifunc-lib.so" \ |
| 453 | "" \ |
| 454 | { ifunc-main.c } \ |
| 455 | "ifunc-main" \ |
| 456 | "ifunc-main.out" \ |
| 457 | "-fpic" \ |
| 458 | ] \ |
| 459 | ] |
| 460 | |
| 461 | # Run-time tests which require working ifunc attribute support. |
| 462 | if { ![check_ifunc_attribute_available] } { |
| 463 | return |
| 464 | } |
| 465 | |
| 466 | run_cc_link_tests [list \ |
| 467 | [list \ |
| 468 | "Build libpr18808.so" \ |
| 469 | "-shared" \ |
| 470 | "-fPIC -O2 -g" \ |
| 471 | { pr18808b.c } \ |
| 472 | {} \ |
| 473 | "libpr18808.so" \ |
| 474 | ] \ |
| 475 | [list \ |
| 476 | "Build libpr18841.so" \ |
| 477 | "-shared" \ |
| 478 | "-fPIC -O0 -g" \ |
| 479 | { pr18841b.c } \ |
| 480 | {} \ |
| 481 | "libpr18841.so" \ |
| 482 | ] \ |
| 483 | ] |
| 484 | |
| 485 | run_ld_link_exec_tests [] [list \ |
| 486 | [list \ |
| 487 | "Run pr18808" \ |
| 488 | "tmpdir/libpr18808.so" \ |
| 489 | "" \ |
| 490 | { pr18808a.c } \ |
| 491 | "pr18808" \ |
| 492 | "pr18808.out" \ |
| 493 | ] \ |
| 494 | [list \ |
| 495 | "Run pr18841" \ |
| 496 | "tmpdir/libpr18841.so" \ |
| 497 | "" \ |
| 498 | { pr18841a.c } \ |
| 499 | "pr18841" \ |
| 500 | "pr18841.out" \ |
| 501 | ] \ |
| 502 | ] |