ld/testsuite/ld-ifunc/ifunc.exp

   1 # Expect script for linker support of IFUNC symbols and relocations.
   2 #
   3 #   Copyright 2009, 2010, 2012 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 # and sparc so far.
  28 if {!(([istarget "i?86-*-*"]
  29        || [istarget "x86_64-*-*"]
  30        || [istarget "powerpc*-*-*"]
  31        || [istarget "sparc*-*-*"])
  32       && ([istarget "*-*-elf*"]
  33           || [istarget "*-*-nacl*"]
  34           || (([istarget "*-*-linux*"]
  35                || [istarget "*-*-gnu*"])
  36               && ![istarget "*-*-*aout*"]
  37               && ![istarget "*-*-*oldld*"]))) } {
  38     verbose "IFUNC tests not run - target does not support IFUNC"
  39     return
  40 }
  41
  42 # We need a native system.  FIXME: Strictly speaking this
  43 # is not true, we just need to know how to create a fully
  44 # linked executable, including the C and Z libraries, using
  45 # the linker that is under test.
  46 if ![isnative] {
  47     verbose "IFUNC tests not run - not a native toolchain"
  48     return
  49 }
  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
 101     if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT\[ \]+\[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
 102         return 0
 103     }
 104
 105     return 1
 106 }
 107
 108 # A procedure to confirm that a file contains the R_*_IRELATIVE
 109 # relocation.
 110 # Returns -1 upon error, 0 if the relocation was not found and 1 if
 111 # it was found.
 112 proc contains_irelative_reloc { binary_file } {
 113     global READELF
 114     global READELFFLAGS
 115
 116     catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
 117
 118     if ![string match "" $got] then {
 119         verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
 120         return -1
 121     }
 122
 123     # Look for a line like this:
 124     #    0000000000600ab0  0000000000000025 R_X86_64_IRELATIVE      000000000040061c
 125     #    080496f4  0000002a R_386_IRELATIVE
 126
 127
 128     if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
 129         return 0
 130     }
 131
 132     return 1
 133 }
 134
 135 # A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
 136 # Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
 137 proc contains_ifunc_reloc { binary_file } {
 138     global READELF
 139     global READELFFLAGS
 140
 141     catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
 142
 143     if ![string match "" $got] then {
 144         verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
 145         return -1
 146     }
 147
 148     if [string match "" [file_contents readelf.out]] then {
 149         verbose "No relocs found in $binary_file"
 150         return 0
 151     }
 152
 153     if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
 154         return 0
 155     }
 156
 157     return 1
 158 }
 159
 160 set fails 0
 161
 162 # Create the object files, libraries and executables.
 163 if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
 164     fail "Could not create a PIC object file"
 165     set fails [expr $fails + 1]
 166 }
 167 if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
 168     fail "Could not create a non-PIC object file"
 169     set fails [expr $fails + 1]
 170 }
 171 if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
 172     fail "Could not create a PIC object file containing an IFUNC symbol"
 173     set fails [expr $fails + 1]
 174 }
 175 if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
 176     fail "Could not create a non-PIC object file containing an IFUNC symbol"
 177     set fails [expr $fails + 1]
 178 }
 179 if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
 180     fail "Could not create an ordinary non-PIC object file"
 181     set fails [expr $fails + 1]
 182 }
 183 if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
 184     fail "Could not create an empty object file"
 185     set fails [expr $fails + 1]
 186 }
 187 if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
 188     fail "Could not create test-1.o"
 189     set fails [expr $fails + 1]
 190 }
 191 if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
 192     fail "Could not create test-2.o"
 193     set fails [expr $fails + 1]
 194 }
 195
 196 if { $fails != 0 } {
 197     return
 198 }
 199
 200 if ![ld_simple_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
 201     fail "Could not create a shared library containing an IFUNC symbol"
 202     set fails [expr $fails + 1]
 203 }
 204 if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
 205     fail "Could not create a static library containing an IFUNC symbol"
 206     set fails [expr $fails + 1]
 207 }
 208
 209 if { $fails != 0 } {
 210     return
 211 }
 212
 213 if ![default_ld_link $ld "tmpdir/dynamic_prog" "-Ltmpdir tmpdir/shared_prog.o -Bdynamic -lshared_ifunc -rpath ./tmpdir"] {
 214     fail "Could not link a dynamic executable"
 215     set fails [expr $fails + 1]
 216 }
 217 if ![default_ld_link $ld "tmpdir/local_prog" "-Ltmpdir tmpdir/static_prog.o -lifunc"] {
 218     fail "Could not link a dynamic executable using local ifunc"
 219     set fails [expr $fails + 1]
 220 }
 221 if ![default_ld_link $ld "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 222     fail "Could not link a static executable"
 223     set fails [expr $fails + 1]
 224 }
 225 if ![ld_simple_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
 226     fail "Could not link a non-ifunc using static executable"
 227     set fails [expr $fails + 1]
 228 }
 229 if ![default_ld_link $ld "tmpdir/test-1" "tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
 230     fail "Could not link test-1"
 231     set fails [expr $fails + 1]
 232 }
 233 if ![ld_simple_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
 234     fail "Could not link libtest-2.so"
 235     set fails [expr $fails + 1]
 236 }
 237
 238 if { $fails == 0 } {
 239   pass "Building ifunc binaries"
 240   set fails 0
 241 } else {
 242     return
 243 }
 244
 245 # Check the executables and shared libraries
 246 #
 247 # The linked ifunc using executables and the shared library containing
 248 # ifunc should have an OSABI field of GNU.  The linked non-ifunc using
 249 # executable should have an OSABI field of NONE (aka System V).
 250
 251 if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
 252     fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
 253     set fails [expr $fails + 1]
 254 }
 255 if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
 256     fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
 257     set fails [expr $fails + 1]
 258 }
 259 if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} {
 260     fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
 261     set fails [expr $fails + 1]
 262 }
 263 if {! [check_osabi tmpdir/dynamic_prog {UNIX - System V}]} {
 264     fail "Dynamic ifunc-using executable does not have an OS/ABI field of System V"
 265     set fails [expr $fails + 1]
 266 }
 267 if {! [check_osabi tmpdir/static_nonifunc_prog {UNIX - System V}]} {
 268     fail "Static non-ifunc-using executable does not have an OS/ABI field of System V"
 269     set fails [expr $fails + 1]
 270 }
 271
 272 # The linked ifunc using executables and the shared library containing
 273 # ifunc should contain an IFUNC symbol.  The non-ifunc using executable
 274 # should not.
 275
 276 if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
 277     fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
 278     set fails [expr $fails + 1]
 279 }
 280 if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
 281     fail "Local ifunc-using executable does not contain an IFUNC symbol"
 282     set fails [expr $fails + 1]
 283 }
 284 if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
 285     fail "Static ifunc-using executable does not contain an IFUNC symbol"
 286     set fails [expr $fails + 1]
 287 }
 288 if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
 289     fail "Dynamic ifunc-using executable contains an IFUNC symbol"
 290     set fails [expr $fails + 1]
 291 }
 292 if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
 293     fail "Static non-ifunc-using executable contains an IFUNC symbol"
 294     set fails [expr $fails + 1]
 295 }
 296 if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
 297     fail "test-1 contains IFUNC symbols"
 298     set fails [expr $fails + 1]
 299 }
 300 if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
 301     fail "libtest-2.so contains IFUNC symbols"
 302     set fails [expr $fails + 1]
 303 }
 304
 305 # The linked ifunc using executables and shared libraries should contain
 306 # a dynamic reloc referencing the IFUNC symbol.  (Even the static
 307 # executable which should have a dynamic section created for it).  The
 308 # non-ifunc using executable should not.
 309
 310 if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
 311     fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
 312     set fails [expr $fails + 1]
 313 }
 314 if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
 315     fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
 316     set fails [expr $fails + 1]
 317 }
 318 if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
 319     fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
 320     set fails [expr $fails + 1]
 321 }
 322 if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
 323     fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
 324     set fails [expr $fails + 1]
 325 }
 326 if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
 327     fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
 328     set fails [expr $fails + 1]
 329 }
 330
 331 if { $fails == 0 } {
 332   pass "Checking ifunc binaries"
 333 }
 334
 335 # Clean up, unless we are being verbose, in which case we leave the files available.
 336 if { $verbose < 1 } {
 337     remote_file host delete "tmpdir/shared_prog.o"
 338     remote_file host delete "tmpdir/static_prog.o"
 339     remote_file host delete "tmpdir/shared_ifunc.o"
 340     remote_file host delete "tmpdir/static_ifunc.o"
 341     remote_file host delete "tmpdir/static_noifunc.o"
 342     remote_file host delete "tmpdir/libshared_ifunc.so"
 343     remote_file host delete "tmpdir/libifunc.a"
 344     remote_file host delete "tmpdir/dynamic_prog"
 345     remote_file host delete "tmpdir/local_prog"
 346     remote_file host delete "tmpdir/static_prog"
 347     remote_file host delete "tmpdir/static_nonifunc_prog"
 348 }
 349
 350 set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
 351 foreach t $test_list {
 352     # We need to strip the ".d", but can leave the dirname.
 353     verbose [file rootname $t]
 354     run_dump_test [file rootname $t]
 355 }