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f64b2e8d NC |
1 | # Expect script for linker support of STB_GNU_UNIQUE symbols |
2 | # | |
3 | # Copyright 2009, 2010, 2011 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 | # Adapted for unique checking by Mark J. Wielaard <mjw@redhat.com> | |
25 | ||
26 | ||
27 | # STB_GNU_UNIQUE support has only been implemented for the ix86, x86_64, | |
28 | # arm, powerpc, and sparc so far. | |
29 | if {!(([istarget "i?86-*-*"] | |
30 | || [istarget "x86_64-*-*"] | |
31 | || [istarget "arm-*-*"] | |
32 | || [istarget "powerpc*-*-*"] | |
33 | || [istarget "sparc*-*-*"]) | |
34 | && ([istarget "*-*-elf*"] | |
35 | || (([istarget "*-*-linux*"] | |
36 | || [istarget "*-*-gnu*"]) | |
37 | && ![istarget "*-*-*aout*"] | |
38 | && ![istarget "*-*-*oldld*"]))) } { | |
39 | verbose "UNIQUE tests not run - target does not support UNIQUE" | |
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 "UNIQUE 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 "UNIQUE 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 UNIQUE symbol. | |
87 | # Returns -1 upon error, 0 if the symbol was not found and 1 if it was found. | |
88 | proc contains_unique_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_unique_symbol: Readelf produced unexpected out processing $binary_file: $got" | |
96 | return -1 | |
97 | } | |
98 | ||
99 | # Look for a line like this: | |
100 | # 54: 0000000000400474 4 OBJECT UNIQUE DEFAULT 13 a | |
101 | ||
102 | if { ![regexp ".*\[ \]*OBJECT\[ \]+UNIQUE\[ \]+DEFAULT\[ \]+\[UND0-9\]+\[ \]+\[ab\]\n" [file_contents readelf.out]] } { | |
103 | return 0 | |
104 | } | |
105 | ||
106 | return 1 | |
107 | } | |
108 | ||
109 | set fails 0 | |
110 | ||
111 | # Create object file containing unique symbol. | |
112 | if ![ld_compile "$CC -c" "$srcdir/$subdir/unique.s" "tmpdir/unique.o"] { | |
113 | fail "Could not create a unique object" | |
114 | set fails [expr $fails + 1] | |
115 | } | |
116 | ||
117 | # Create object file NOT containing unique symbol. | |
118 | if ![ld_compile "$CC -c" "$srcdir/$subdir/unique_empty.s" "tmpdir/unique_empty.o"] { | |
119 | fail "Could not create a non-unique object" | |
120 | set fails [expr $fails + 1] | |
121 | } | |
122 | ||
123 | # Create pic object file containing unique symbol. | |
124 | if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/unique_shared.s" "tmpdir/unique_shared.o"] { | |
125 | fail "Could not create a pic unique object" | |
126 | set fails [expr $fails + 1] | |
127 | } | |
128 | ||
129 | # Create executable containing unique symbol. | |
130 | if ![default_ld_link $ld "tmpdir/unique_prog" "tmpdir/unique.o"] { | |
131 | fail "Could not link a unique executable" | |
132 | set fails [expr $fails + 1] | |
133 | } | |
134 | ||
135 | # Create shared library containing unique symbol. | |
136 | if ![ld_simple_link $ld "tmpdir/libunique_shared.so" "-shared tmpdir/unique_shared.o"] { | |
137 | fail "Could not create a shared library containing an unique symbol" | |
138 | set fails [expr $fails + 1] | |
139 | } | |
140 | ||
141 | # Create executable NOT containing unique symbol linked against library. | |
142 | if ![default_ld_link $ld "tmpdir/unique_shared_prog" "-Ltmpdir tmpdir/unique_empty.o -Bdynamic -lunique_shared -rpath ./tmpdir"] { | |
143 | fail "Could not link a dynamic executable" | |
144 | set fails [expr $fails + 1] | |
145 | } | |
146 | ||
147 | if { $fails != 0 } { | |
148 | return | |
149 | } | |
150 | ||
151 | # Check the object file. | |
152 | if {! [check_osabi tmpdir/unique.o {UNIX - Linux}]} { | |
153 | fail "Object containing unique does not have an OS/ABI field of LINUX" | |
154 | set fails [expr $fails + 1] | |
155 | } | |
156 | ||
157 | if {[contains_unique_symbol tmpdir/unique.o] != 1} { | |
158 | fail "Object containing unique does not contain an UNIQUE symbol" | |
159 | set fails [expr $fails + 1] | |
160 | } | |
161 | ||
162 | if { $fails == 0 } { | |
163 | pass "Checking unique object" | |
164 | } | |
165 | ||
166 | # Check the executable. | |
167 | if {! [check_osabi tmpdir/unique_prog {UNIX - Linux}]} { | |
168 | fail "Executable containing unique does not have an OS/ABI field of LINUX" | |
169 | set fails [expr $fails + 1] | |
170 | } | |
171 | ||
172 | if {[contains_unique_symbol tmpdir/unique_prog] != 1} { | |
173 | fail "Executable containing unique does not contain an UNIQUE symbol" | |
174 | set fails [expr $fails + 1] | |
175 | } | |
176 | ||
177 | if { $fails == 0 } { | |
178 | pass "Checking unique executable" | |
179 | } | |
180 | ||
181 | # Check the empty object file. | |
182 | if {! [check_osabi tmpdir/unique_empty.o {UNIX - System V}]} { | |
183 | fail "Object NOT containing unique does not have an OS/ABI field of System V" | |
184 | set fails [expr $fails + 1] | |
185 | } | |
186 | ||
187 | if {[contains_unique_symbol tmpdir/unique_empty.o] == 1} { | |
188 | fail "Object NOT containing unique does contain an UNIQUE symbol" | |
189 | set fails [expr $fails + 1] | |
190 | } | |
191 | ||
192 | if { $fails == 0 } { | |
193 | pass "Checking empty unique object" | |
194 | } | |
195 | ||
196 | # Check the unique PIC file. | |
197 | if {! [check_osabi tmpdir/unique_shared.o {UNIX - Linux}]} { | |
198 | fail "PIC Object containing unique does not have an OS/ABI field of LINUX" | |
199 | set fails [expr $fails + 1] | |
200 | } | |
201 | ||
202 | if {[contains_unique_symbol tmpdir/unique_shared.o] != 1} { | |
203 | fail "PIC Object containing unique does not contain an UNIQUE symbol" | |
204 | set fails [expr $fails + 1] | |
205 | } | |
206 | ||
207 | if { $fails == 0 } { | |
208 | pass "Checking unique PIC object" | |
209 | } | |
210 | ||
211 | # Check the unique shared library. | |
212 | if {! [check_osabi tmpdir/libunique_shared.so {UNIX - Linux}]} { | |
213 | fail "Shared library containing unique does not have an OS/ABI field of LINUX" | |
214 | set fails [expr $fails + 1] | |
215 | } | |
216 | ||
217 | if {[contains_unique_symbol tmpdir/libunique_shared.so] != 1} { | |
218 | fail "Shared library containing unique does not contain an UNIQUE symbol" | |
219 | set fails [expr $fails + 1] | |
220 | } | |
221 | ||
222 | if { $fails == 0 } { | |
223 | pass "Checking unique PIC object" | |
224 | } | |
225 | ||
226 | # Check the empty executable linked against unique shared library. | |
227 | if {! [check_osabi tmpdir/unique_shared_prog {UNIX - System V}]} { | |
228 | fail "Executable NOT containing unique does not have an OS/ABI field of System V" | |
229 | set fails [expr $fails + 1] | |
230 | } | |
231 | ||
232 | if {[contains_unique_symbol tmpdir/unique_shared_prog] == 1} { | |
233 | fail "Executable NOT containing unique does contain an UNIQUE symbol" | |
234 | set fails [expr $fails + 1] | |
235 | } | |
236 | ||
237 | if { $fails == 0 } { | |
238 | pass "Checking shared empty executable" | |
239 | } | |
240 | ||
241 | # Clean up, unless we are being verbose, in which case we leave the files available. | |
242 | if { $verbose < 1 } { | |
243 | remote_file host delete "tmpdir/unique_empty.o" | |
244 | remote_file host delete "tmpdir/unique.o" | |
245 | remote_file host delete "tmpdir/unique_shared.o" | |
246 | remote_file host delete "tmpdir/libunique_shared.so" | |
247 | remote_file host delete "tmpdir/unique_prog" | |
248 | remote_file host delete "tmpdir/unique_shared_prog" | |
249 | } |