ld/testsuite/ld-ifunc/ifunc.exp

   1 # Expect script for linker support of IFUNC symbols and relocations.
   2 #
   3 #   Copyright 2009  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 "*-*-linux*"]
  34               && ![istarget "*-*-*aout*"]
  35               && ![istarget "*-*-*oldld*"]))) } {
  36     verbose "IFUNC tests not run - target does not support IFUNC"
  37     return
  38 }
  39
  40 # We need a native system.  FIXME: Strictly speaking this
  41 # is not true, we just need to know how to create a fully
  42 # linked executable, including the C and Z libraries, using
  43 # the linker that is under test.
  44 if ![isnative] {
  45     verbose "IFUNC tests not run - not a native toolchain"
  46     return
  47 }
  48
  49 # We need a working compiler.  (Strictly speaking this is
  50 # not true, we could use target specific assembler files).
  51 if { [which $CC] == 0 } {
  52     verbose "IFUNC tests not run - no compiler available"
  53     return
  54 }
  55
  56 # A procedure to check the OS/ABI field in the ELF header of a binary file.
  57 proc check_osabi { binary_file expected_osabi } {
  58     global READELF
  59     global READELFFLAGS
  60
  61     catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
  62
  63     if ![string match "" $got] then {
  64         verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
  65         return 0
  66     }
  67
  68     if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
  69            [file_contents readelf.out] nil osabi] } {
  70         verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
  71         return 0
  72     }
  73
  74     if { $osabi == $expected_osabi } {
  75         return 1
  76     }
  77
  78     verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
  79
  80     return 0
  81 }
  82
  83 # A procedure to confirm that a file contains the IFUNC symbol.
  84 # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
  85 proc contains_ifunc_symbol { binary_file } {
  86     global READELF
  87     global READELFFLAGS
  88
  89     catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
  90
  91     if ![string match "" $got] then {
  92         verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got"
  93         return -1
  94     }
  95
  96     # Look for a line like this:
  97     #    58: 0000000000400600    30 IFUNC   GLOBAL DEFAULT   12 library_func2
  98
  99     if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT\[ \]+\[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
 100         return 0
 101     }
 102
 103     return 1
 104 }
 105
 106 # A procedure to confirm that a file contains the R_*_IRELATIVE
 107 # relocation.
 108 # Returns -1 upon error, 0 if the relocation was not found and 1 if
 109 # it was found.
 110 proc contains_irelative_reloc { binary_file } {
 111     global READELF
 112     global READELFFLAGS
 113
 114     catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
 115
 116     if ![string match "" $got] then {
 117         verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
 118         return -1
 119     }
 120
 121     # Look for a line like this:
 122     #    0000000000600ab0  0000000000000025 R_X86_64_IRELATIVE      000000000040061c
 123     #    080496f4  0000002a R_386_IRELATIVE
 124
 125
 126     if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
 127         return 0
 128     }
 129
 130     return 1
 131 }
 132
 133 # A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
 134 # Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
 135 proc contains_ifunc_reloc { binary_file } {
 136     global READELF
 137     global READELFFLAGS
 138
 139     catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
 140
 141     if ![string match "" $got] then {
 142         verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
 143         return -1
 144     }
 145
 146     if [string match "" [file_contents readelf.out]] then {
 147         verbose "No relocs found in $binary_file"
 148         return 0
 149     }
 150
 151     if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
 152         return 0
 153     }
 154
 155     return 1
 156 }
 157
 158 set fails 0
 159
 160 # Create the object files, libraries and executables.
 161 if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
 162     fail "Could not create a PIC object file"
 163     set fails [expr $fails + 1]
 164 }
 165 if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
 166     fail "Could not create a non-PIC object file"
 167     set fails [expr $fails + 1]
 168 }
 169 if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
 170     fail "Could not create a PIC object file containing an IFUNC symbol"
 171     set fails [expr $fails + 1]
 172 }
 173 if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
 174     fail "Could not create a non-PIC object file containing an IFUNC symbol"
 175     set fails [expr $fails + 1]
 176 }
 177 if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
 178     fail "Could not create an ordinary non-PIC object file"
 179     set fails [expr $fails + 1]
 180 }
 181 if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
 182     fail "Could not create an empty object file"
 183     set fails [expr $fails + 1]
 184 }
 185 if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
 186     fail "Could not create test-1.o"
 187     set fails [expr $fails + 1]
 188 }
 189 if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
 190     fail "Could not create test-2.o"
 191     set fails [expr $fails + 1]
 192 }
 193
 194 if { $fails != 0 } {
 195     return
 196 }
 197
 198 if ![ld_simple_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
 199     fail "Could not create a shared library containing an IFUNC symbol"
 200     set fails [expr $fails + 1]
 201 }
 202 if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
 203     fail "Could not create a static library containing an IFUNC symbol"
 204     set fails [expr $fails + 1]
 205 }
 206
 207 if { $fails != 0 } {
 208     return
 209 }
 210
 211 if ![default_ld_link $ld "tmpdir/dynamic_prog" "-Ltmpdir tmpdir/shared_prog.o -Bdynamic -lshared_ifunc -rpath ./tmpdir"] {
 212     fail "Could not link a dynamic executable"
 213     set fails [expr $fails + 1]
 214 }
 215 if ![default_ld_link $ld "tmpdir/local_prog" "-Ltmpdir tmpdir/static_prog.o -lifunc"] {
 216     fail "Could not link a dynamic executable using local ifunc"
 217     set fails [expr $fails + 1]
 218 }
 219 if ![default_ld_link $ld "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
 220     fail "Could not link a static executable"
 221     set fails [expr $fails + 1]
 222 }
 223 if ![ld_simple_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
 224     fail "Could not link a non-ifunc using static executable"
 225     set fails [expr $fails + 1]
 226 }
 227 if ![default_ld_link $ld "tmpdir/test-1" "tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
 228     fail "Could not link test-1"
 229     set fails [expr $fails + 1]
 230 }
 231 if ![ld_simple_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
 232     fail "Could not link libtest-2.so"
 233     set fails [expr $fails + 1]
 234 }
 235
 236 if { $fails == 0 } {
 237   pass "Building ifunc binaries"
 238   set fails 0
 239 } else {
 240     return
 241 }
 242
 243 # Check the executables and shared libraries
 244 #
 245 # The linked ifunc using executables and the shared library containing
 246 # ifunc should have an OSABI field of LINUX.  The linked non-ifunc using
 247 # executable should have an OSABI field of NONE (aka System V).
 248
 249 if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - Linux}]} {
 250     fail "Shared libraries containing ifunc does not have an OS/ABI field of LINUX"
 251     set fails [expr $fails + 1]
 252 }
 253 if {! [check_osabi tmpdir/local_prog {UNIX - Linux}]} {
 254     fail "Local ifunc-using executable does not have an OS/ABI field of LINUX"
 255     set fails [expr $fails + 1]
 256 }
 257 if {! [check_osabi tmpdir/static_prog {UNIX - Linux}]} {
 258     fail "Static ifunc-using executable does not have an OS/ABI field of LINUX"
 259     set fails [expr $fails + 1]
 260 }
 261 if {! [check_osabi tmpdir/dynamic_prog {UNIX - Linux}]} {
 262     fail "Dynamic ifunc-using executable does not have an OS/ABI field of LINUX"
 263     set fails [expr $fails + 1]
 264 }
 265 if {! [check_osabi tmpdir/static_nonifunc_prog {UNIX - System V}]} {
 266     fail "Static non-ifunc-using executable does not have an OS/ABI field of System V"
 267     set fails [expr $fails + 1]
 268 }
 269
 270 # The linked ifunc using executables and the shared library containing
 271 # ifunc should contain an IFUNC symbol.  The non-ifunc using executable
 272 # should not.
 273
 274 if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
 275     fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
 276     set fails [expr $fails + 1]
 277 }
 278 if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
 279     fail "Local ifunc-using executable does not contain an IFUNC symbol"
 280     set fails [expr $fails + 1]
 281 }
 282 if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
 283     fail "Static ifunc-using executable does not contain an IFUNC symbol"
 284     set fails [expr $fails + 1]
 285 }
 286 if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
 287     fail "Dynamic ifunc-using executable contains an IFUNC symbol"
 288     set fails [expr $fails + 1]
 289 }
 290 if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
 291     fail "Static non-ifunc-using executable contains an IFUNC symbol"
 292     set fails [expr $fails + 1]
 293 }
 294 if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
 295     fail "test-1 contains IFUNC symbols"
 296     set fails [expr $fails + 1]
 297 }
 298 if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
 299     fail "libtest-2.so contains IFUNC symbols"
 300     set fails [expr $fails + 1]
 301 }
 302
 303 # The linked ifunc using executables and shared libraries should contain
 304 # a dynamic reloc referencing the IFUNC symbol.  (Even the static
 305 # executable which should have a dynamic section created for it).  The
 306 # non-ifunc using executable should not.
 307
 308 if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
 309     fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
 310     set fails [expr $fails + 1]
 311 }
 312 if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
 313     fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
 314     set fails [expr $fails + 1]
 315 }
 316 if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
 317     fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
 318     set fails [expr $fails + 1]
 319 }
 320 if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
 321     fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
 322     set fails [expr $fails + 1]
 323 }
 324 if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
 325     fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
 326     set fails [expr $fails + 1]
 327 }
 328
 329 if { $fails == 0 } {
 330   pass "Checking ifunc binaries"
 331 }
 332
 333 # Clean up, unless we are being verbose, in which case we leave the files available.
 334 if { $verbose < 1 } {
 335     remote_file host delete "tmpdir/shared_prog.o"
 336     remote_file host delete "tmpdir/static_prog.o"
 337     remote_file host delete "tmpdir/shared_ifunc.o"
 338     remote_file host delete "tmpdir/static_ifunc.o"
 339     remote_file host delete "tmpdir/static_noifunc.o"
 340     remote_file host delete "tmpdir/libshared_ifunc.so"
 341     remote_file host delete "tmpdir/libifunc.a"
 342     remote_file host delete "tmpdir/dynamic_prog"
 343     remote_file host delete "tmpdir/local_prog"
 344     remote_file host delete "tmpdir/static_prog"
 345     remote_file host delete "tmpdir/static_nonifunc_prog"
 346 }
 347
 348 set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
 349 foreach t $test_list {
 350     # We need to strip the ".d", but can leave the dirname.
 351     verbose [file rootname $t]
 352     run_dump_test [file rootname $t]
 353 }