1 # Expect script for linker support of IFUNC symbols and relocations.
3 # Copyright (C) 2009-2017 Free Software Foundation, Inc.
4 # Contributed by Red Hat.
6 # This file is part of the GNU Binutils.
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.
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.
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,
23 # Written by Nick Clifton <nickc@redhat.com>
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"
44 # Skip targets where -shared is not supported
46 if ![check_shared_lib_support] {
50 # We need a working compiler. (Strictly speaking this is
51 # not true, we could use target specific assembler files).
52 if { [which $CC] == 0 } {
53 verbose "IFUNC tests not run - no compiler available"
57 # A procedure to check the OS/ABI field in the ELF header of a binary file.
58 proc check_osabi { binary_file expected_osabi } {
62 catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
64 if ![string match "" $got] then {
65 verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
69 if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
70 [file_contents readelf.out] nil osabi] } {
71 verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
75 if { $osabi == $expected_osabi } {
79 verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
84 # A procedure to confirm that a file contains the IFUNC symbol.
85 # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
86 proc contains_ifunc_symbol { binary_file } {
90 catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
92 if ![string match "" $got] then {
93 verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got"
97 # Look for a line like this:
98 # 58: 0000000000400600 30 IFUNC GLOBAL DEFAULT 12 library_func2
99 # with perhaps some other info between the visibility and section
101 if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT .* \[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
108 # A procedure to confirm that a file contains the R_*_IRELATIVE
110 # Returns -1 upon error, 0 if the relocation was not found and 1 if
112 proc contains_irelative_reloc { binary_file } {
116 catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
118 if ![string match "" $got] then {
119 verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
123 # Look for a line like this:
124 # 0000000000600ab0 0000000000000025 R_X86_64_IRELATIVE 000000000040061c
125 # 080496f4 0000002a R_386_IRELATIVE
128 if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
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 } {
141 catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
143 if ![string match "" $got] then {
144 verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
148 if [string match "" [file_contents readelf.out]] then {
149 verbose "No relocs found in $binary_file"
153 if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
162 # Create the object files, libraries and executables.
163 if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
164 fail "Could not create a PIC object file"
165 set fails [expr $fails + 1]
167 if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
168 fail "Could not create a non-PIC object file"
169 set fails [expr $fails + 1]
171 if ![ld_compile "$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 $fails + 1]
175 if ![ld_compile "$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 $fails + 1]
179 if ![ld_compile "$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]
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 $fails + 1]
187 if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
188 fail "Could not create test-1.o"
189 set fails [expr $fails + 1]
191 if ![ld_compile "$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]
200 if ![ld_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]
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]
213 if ![ld_link $CC "tmpdir/dynamic_prog" "-Wl,--no-as-needed,-rpath=./tmpdir,-Bdynamic -Ltmpdir tmpdir/shared_prog.o -lshared_ifunc"] {
214 fail "Could not link a dynamic executable"
215 set fails [expr $fails + 1]
217 if ![ld_link $CC "tmpdir/local_prog" "-Wl,--no-as-needed,-rpath=./tmpdir -Ltmpdir tmpdir/static_prog.o -lifunc"] {
218 fail "Could not link a dynamic executable using local ifunc"
219 set fails [expr $fails + 1]
221 if ![ld_link $CC "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
222 fail "Could not link a static executable"
223 set fails [expr $fails + 1]
225 if ![ld_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]
229 if ![ld_link $CC "tmpdir/test-1" "-Wl,--no-as-needed,-rpath=./tmpdir tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
230 fail "Could not link test-1"
231 set fails [expr $fails + 1]
233 if ![ld_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]
237 if ![ld_link $ld "tmpdir/libtest-2-now.so" "-shared -z now tmpdir/test-2.o"] {
238 fail "Could not link libtest-2-now.so"
239 set fails [expr $fails + 1]
243 pass "Building ifunc binaries"
249 # Check the executables and shared libraries
251 # The linked ifunc using executables and the shared library containing
252 # ifunc should have an OSABI field of GNU. The linked non-ifunc using
253 # executable should have an OSABI field of NONE (aka System V).
255 case $target_triplet in {
256 { hppa*-*-linux* } { set expected_none {UNIX - GNU} }
257 default { set expected_none {UNIX - System V} }
260 if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
261 fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
262 set fails [expr $fails + 1]
264 if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
265 fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
266 set fails [expr $fails + 1]
268 if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} {
269 fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
270 set fails [expr $fails + 1]
272 if {! [check_osabi tmpdir/dynamic_prog $expected_none]} {
273 fail "Dynamic ifunc-using executable does not have an OS/ABI field of $expected_none"
274 set fails [expr $fails + 1]
276 if {! [check_osabi tmpdir/static_nonifunc_prog $expected_none]} {
277 fail "Static non-ifunc-using executable does not have an OS/ABI field of $expected_none"
278 set fails [expr $fails + 1]
281 # The linked ifunc using executables and the shared library containing
282 # ifunc should contain an IFUNC symbol. The non-ifunc using executable
285 if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
286 fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
287 set fails [expr $fails + 1]
289 if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
290 fail "Local ifunc-using executable does not contain an IFUNC symbol"
291 set fails [expr $fails + 1]
293 if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
294 fail "Static ifunc-using executable does not contain an IFUNC symbol"
295 set fails [expr $fails + 1]
297 if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
298 fail "Dynamic ifunc-using executable contains an IFUNC symbol"
299 set fails [expr $fails + 1]
301 if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
302 fail "Static non-ifunc-using executable contains an IFUNC symbol"
303 set fails [expr $fails + 1]
305 if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
306 fail "test-1 contains IFUNC symbols"
307 set fails [expr $fails + 1]
309 if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
310 fail "libtest-2.so contains IFUNC symbols"
311 set fails [expr $fails + 1]
313 if {[contains_ifunc_symbol tmpdir/libtest-2-now.so] != 0} {
314 fail "libtest-2-now.so contains IFUNC symbols"
315 set fails [expr $fails + 1]
318 # The linked ifunc using executables and shared libraries should contain
319 # a dynamic reloc referencing the IFUNC symbol. (Even the static
320 # executable which should have a dynamic section created for it). The
321 # non-ifunc using executable should not.
323 if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
324 fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
325 set fails [expr $fails + 1]
327 if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
328 fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
329 set fails [expr $fails + 1]
331 if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
332 fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
333 set fails [expr $fails + 1]
335 if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
336 fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
337 set fails [expr $fails + 1]
339 if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
340 fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
341 set fails [expr $fails + 1]
345 pass "Checking ifunc binaries"
348 run_cc_link_tests [list \
350 "Build libpr16467a.so" \
351 "-shared -Wl,--version-script=pr16467a.map" \
358 "Build libpr16467b.a" \
366 "Build libpr16467b.so" \
367 "-shared tmpdir/pr16467b.o tmpdir/libpr16467a.so \
368 -Wl,--version-script=pr16467b.map" \
375 "Build libpr16467c.a" \
383 "Build libpr16467an.so" \
384 "-shared -Wl,-z,now -Wl,--version-script=pr16467a.map" \
391 "Build libpr16467bn.so" \
392 "-shared tmpdir/pr16467b.o tmpdir/libpr16467an.so \
393 -Wl,--version-script=pr16467b.map" \
401 run_ld_link_exec_tests [list \
403 "Common symbol override ifunc test 1a" \
406 { ifunc-common-1a.c ifunc-common-1b.c } \
408 "ifunc-common-1.out" \
412 "Common symbol override ifunc test 1b" \
415 { ifunc-common-1b.c ifunc-common-1a.c } \
417 "ifunc-common-1.out" \
422 set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
423 foreach t $test_list {
424 # We need to strip the ".d", but can leave the dirname.
425 verbose [file rootname $t]
426 run_dump_test [file rootname $t]
429 # Run-time tests which require working IFUNC support.
430 if { ![check_ifunc_available] } {
434 run_cc_link_tests [list \
436 "Build ifunc-lib.so" \
444 "Build ifunc-libn.so" \
445 "-shared -Wl,-z,now" \
453 run_ld_link_exec_tests [list \
456 "-Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467b.so tmpdir/libpr16467a.so" \
464 "Run pr16467 (-z now)" \
465 "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467bn.so tmpdir/libpr16467an.so" \
474 "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
481 "Run ifunc-main with -fpic" \
482 "-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
490 "Run ifunc-main (-z now)" \
491 "-Wl,-z,now -Wl,--no-as-needed tmpdir/libifunc-libn.so" \
498 "Run ifunc-main with PIE (-z now)" \
499 "-pie -Wl,-z,now -Wl,--no-as-needed tmpdir/libifunc-libn.so" \
508 # Run-time tests which require working ifunc attribute support.
509 if { ![check_ifunc_attribute_available] } {
513 run_cc_link_tests [list \
523 "Build libpr18808.so" \
531 "Build libpr18808n.so" \
532 "-shared -Wl,-z,now" \
547 "Build libpr18841b.so" \
555 "Build libpr18841c.so" \
563 "Build libpr18841bn.so" \
564 "-Wl,-z,now -shared" \
571 "Build libpr18841cn.so" \
573 "-Wl,-z,now -fPIC -O0 -g" \
580 run_ld_link_exec_tests [list \
583 "-Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808.so" \
590 "Run pr18808 (-z now)" \
591 "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808n.so" \
598 "Run pr18841 with libpr18841b.so" \
599 "-Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841b.so" \
606 "Run pr18841 with libpr18841c.so" \
607 "-Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841c.so" \
614 "Run pr18841 with libpr18841bn.so (-z now)" \
615 "-Wl,-z,now -Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841bn.so" \
622 "Run pr18841 with libpr18841cn.so (-z now)" \
623 "-Wl,-z,now -Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841cn.so" \