Commit | Line | Data |
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d8045f23 NC |
1 | # Expect script for linker support of IFUNC symbols and relocations. |
2 | # | |
5a68afcf | 3 | # Copyright 2009, 2010, 2012 Free Software Foundation, Inc. |
d8045f23 NC |
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 | ||
d0c9aeb3 DM |
26 | # IFUNC support has only been implemented for the ix86, x86_64, powerpc, |
27 | # and sparc so far. | |
e054468f AM |
28 | if {!(([istarget "i?86-*-*"] |
29 | || [istarget "x86_64-*-*"] | |
d0c9aeb3 DM |
30 | || [istarget "powerpc*-*-*"] |
31 | || [istarget "sparc*-*-*"]) | |
e054468f | 32 | && ([istarget "*-*-elf*"] |
5a68afcf | 33 | || [istarget "*-*-nacl*"] |
99753d9d AM |
34 | || (([istarget "*-*-linux*"] |
35 | || [istarget "*-*-gnu*"]) | |
e054468f | 36 | && ![istarget "*-*-*aout*"] |
99753d9d | 37 | && ![istarget "*-*-*oldld*"]))) } { |
d8045f23 NC |
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" | |
5a68afcf | 81 | |
d8045f23 NC |
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 | ||
cbe950e9 L |
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 | ||
425621e7 | 128 | if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } { |
cbe950e9 L |
129 | return 0 |
130 | } | |
131 | ||
132 | return 1 | |
133 | } | |
134 | ||
d8045f23 NC |
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 $binary_file" | |
150 | return 0 | |
151 | } | |
152 | ||
153 | if { ![regexp "\\(\\)" [file_contents readelf.out]] } { | |
154 | return 0 | |
155 | } | |
156 | ||
157 | return 1 | |
158 | } | |
159 | ||
160 | set fails 0 | |
161 | ||
162 | # Create the object files, libraries and executables. | |
be19bd51 L |
163 | if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] { |
164 | fail "Could not create a PIC object file" | |
d8045f23 NC |
165 | set fails [expr $fails + 1] |
166 | } | |
be19bd51 L |
167 | if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] { |
168 | fail "Could not create a non-PIC object file" | |
d8045f23 NC |
169 | set fails [expr $fails + 1] |
170 | } | |
be19bd51 L |
171 | if ![ld_compile "$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" | |
d8045f23 NC |
173 | set fails [expr $fails + 1] |
174 | } | |
be19bd51 L |
175 | if ![ld_compile "$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" | |
d8045f23 NC |
177 | set fails [expr $fails + 1] |
178 | } | |
be19bd51 L |
179 | if ![ld_compile "$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" | |
d8045f23 NC |
185 | set fails [expr $fails + 1] |
186 | } | |
2955ec4c L |
187 | if ![ld_compile "$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 | } | |
d8045f23 NC |
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 | } | |
e054468f AM |
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"] { | |
d8045f23 NC |
222 | fail "Could not link a static executable" |
223 | set fails [expr $fails + 1] | |
224 | } | |
be19bd51 | 225 | if ![ld_simple_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] { |
d8045f23 NC |
226 | fail "Could not link a non-ifunc using static executable" |
227 | set fails [expr $fails + 1] | |
228 | } | |
2955ec4c L |
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 | } | |
d8045f23 NC |
237 | |
238 | if { $fails == 0 } { | |
239 | pass "Building ifunc binaries" | |
240 | set fails 0 | |
241 | } else { | |
242 | return | |
243 | } | |
244 | ||
cbe950e9 | 245 | # Check the executables and shared libraries |
d8045f23 | 246 | # |
cbe950e9 | 247 | # The linked ifunc using executables and the shared library containing |
9c55345c | 248 | # ifunc should have an OSABI field of GNU. The linked non-ifunc using |
cbe950e9 | 249 | # executable should have an OSABI field of NONE (aka System V). |
d8045f23 | 250 | |
9c55345c TS |
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" | |
cbe950e9 L |
253 | set fails [expr $fails + 1] |
254 | } | |
9c55345c TS |
255 | if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} { |
256 | fail "Local ifunc-using executable does not have an OS/ABI field of GNU" | |
e054468f AM |
257 | set fails [expr $fails + 1] |
258 | } | |
9c55345c TS |
259 | if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} { |
260 | fail "Static ifunc-using executable does not have an OS/ABI field of GNU" | |
d8045f23 NC |
261 | set fails [expr $fails + 1] |
262 | } | |
c16153ae L |
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" | |
d8045f23 NC |
265 | set fails [expr $fails + 1] |
266 | } | |
be19bd51 L |
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 | } | |
d8045f23 | 271 | |
cbe950e9 L |
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. | |
d8045f23 | 275 | |
cbe950e9 L |
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 | } | |
e054468f AM |
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 | } | |
d8045f23 NC |
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 | } | |
2955ec4c L |
288 | if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} { |
289 | fail "Dynamic ifunc-using executable contains an IFUNC symbol" | |
d8045f23 NC |
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 | } | |
2955ec4c L |
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 | } | |
d8045f23 | 304 | |
cbe950e9 L |
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. | |
d8045f23 | 309 | |
cbe950e9 L |
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 | } | |
e054468f AM |
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 | } | |
cbe950e9 L |
318 | if {[contains_irelative_reloc tmpdir/static_prog] != 1} { |
319 | fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation" | |
d8045f23 NC |
320 | set fails [expr $fails + 1] |
321 | } | |
2955ec4c L |
322 | if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} { |
323 | fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol" | |
d8045f23 NC |
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" | |
e054468f | 345 | remote_file host delete "tmpdir/local_prog" |
d8045f23 NC |
346 | remote_file host delete "tmpdir/static_prog" |
347 | remote_file host delete "tmpdir/static_nonifunc_prog" | |
348 | } | |
cbe950e9 L |
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 | } |