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252b5132 RH |
1 | # Test that the linker reports undefined symbol errors correctly. |
2 | # By Ian Lance Taylor, Cygnus Support | |
3 | # | |
a2b64bed NC |
4 | # Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
5 | # Free Software Foundation, Inc. | |
252b5132 RH |
6 | # |
7 | # This file is free software; you can redistribute it and/or modify | |
8 | # it under the terms of the GNU General Public License as published by | |
9 | # the Free Software Foundation; either version 2 of the License, or | |
10 | # (at your option) any later version. | |
11 | # | |
12 | # This program is distributed in the hope that it will be useful, | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | # GNU General Public License for more details. | |
16 | # | |
17 | # You should have received a copy of the GNU General Public License | |
18 | # along with this program; if not, write to the Free Software | |
19 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | ||
21 | set testund "undefined" | |
22 | set testfn "undefined function" | |
23 | set testline "undefined line" | |
24 | ||
25 | if { [which $CC] == 0 } { | |
26 | verbose "Could not find C compiler!" 1 | |
27 | untested $testund | |
28 | untested $testfn | |
29 | untested $testline | |
30 | return | |
31 | } | |
32 | ||
33 | if ![ld_compile "$CC -g" $srcdir/$subdir/undefined.c tmpdir/undefined.o] { | |
34 | verbose "Unable to compile test file!" 1 | |
35 | unresolved $testund | |
36 | unresolved $testfn | |
37 | unresolved $testline | |
38 | return | |
39 | } | |
40 | ||
41 | catch "exec rm -f tmpdir/undefined" exec_output | |
42 | ||
1688b748 MH |
43 | set flags [big_or_little_endian] |
44 | ||
252b5132 RH |
45 | # Using -e start prevents the SunOS linker from trying to build a |
46 | # shared library. | |
1688b748 MH |
47 | send_log "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o\n" |
48 | verbose "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o" | |
252b5132 | 49 | |
1688b748 | 50 | catch "exec $ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o" exec_output |
252b5132 RH |
51 | send_log "$exec_output\n" |
52 | verbose "$exec_output" | |
53 | ||
54 | proc checkund { string testname } { | |
55 | global exec_output | |
56 | ||
57 | if [string match "*$string*" $exec_output] { | |
58 | pass $testname | |
59 | } else { | |
60 | fail $testname | |
61 | } | |
62 | } | |
63 | ||
dbc37f89 | 64 | set mu "undefined reference to `*this_function_is_not_defined'" |
252b5132 RH |
65 | checkund $mu $testund |
66 | ||
67 | # ARM PE defaults to using stabs debugging, which we can't handle for | |
68 | # a COFF file. | |
69 | #setup_xfail "arm*-*-pe*" | |
70 | #setup_xfail "thumb*-*-pe*" | |
71 | ||
72 | # Just doesn't work for PA ELF. No clue why. | |
73 | setup_xfail "hppa*-*-*elf*" | |
74 | ||
6545f5fb AO |
75 | # With dwarf-2, we can't get the function in which the reference |
76 | # occurs; see below. | |
212a6b8e | 77 | setup_xfail "alpha*-*-linux*" |
6545f5fb AO |
78 | setup_xfail "hppa*64*-*-*" |
79 | setup_xfail "mn10300-*-elf" | |
80 | setup_xfail "sh-*-*" | |
81 | ||
344897cc | 82 | set mf "tmpdir/undefined.o* In function `function':" |
252b5132 RH |
83 | checkund $mf $testfn |
84 | ||
85 | # COFF SH gets this test wrong--it reports line 10, because although | |
86 | # the jump is at line 9, the function address, and the reloc, is | |
87 | # stored at the end of the function. | |
88 | setup_xfail "sh-*-*" | |
89 | ||
90 | # ARM PE defaults to using stabs debugging, which we can't handle for | |
91 | # a COFF file. | |
92 | #setup_xfail "arm*-*-pe*" | |
93 | #setup_xfail "thumb*-*-pe*" | |
94 | ||
95 | # Just doesn't work for PA ELF. No clue why. | |
96 | setup_xfail "hppa*-*-*elf*" | |
97 | ||
dbc37f89 | 98 | set ml "undefined.c:9: undefined reference to `*this_function_is_not_defined'" |
252b5132 RH |
99 | # With targets that use elf/dwarf2, such as the arm-elf and thumb-elf |
100 | # toolchains, the code in bfd/elf.c:_bfd_elf_find_nearest_line() is called | |
101 | # in order to locate the file name/line number where the undefined | |
102 | # reference occurs. Unfortunately this tries to use the dwarf2 debug | |
103 | # information held in the .debug_info section. This section contains a series | |
104 | # of comp_unit structures, each of which has a low/high address range | |
105 | # representing the span of memory locations covered by that structure. The | |
106 | # structures also index into other structures held in the .debug_line section | |
107 | # and together they can translate memory locations back into file/function/line | |
108 | # number addresses in the source code. Since the information about the memory | |
109 | # region covered by a comp_unit is only determined at link time, the low/high | |
110 | # addresses in the .debug_info section and the line addresses in the .debug_line | |
111 | # section are computed by generating relocs against known symbols in the object | |
112 | # code. | |
113 | # | |
114 | # When the undefined reference is detected, the relocs in the dwarf2 | |
115 | # debug sections have not yet been resolved, so the low/high addresses and the | |
116 | # line number address are all set at zero. Thus when _bfd_elf_find_nearest_line() | |
117 | # calls _bfd_dwarf2_find_nearest_line() no comp_unit can be found which | |
118 | # actually covers the address where the reference occured, and so | |
119 | # _bfd_elf_find_nearest_line() fails. | |
120 | # | |
121 | # The upshot of all of this, is that the error message reported by the | |
122 | # linker, instead of having a source file name & line number as in: | |
123 | # | |
124 | # undefined.c:9: undefined reference to `this_function_is_not_defined' | |
125 | # | |
126 | # has an object file & section address instead: | |
127 | # | |
128 | # undefined.0(.text+0xc): undefined reference to `this_function_is_not_defined' | |
129 | # | |
130 | # hence the xfails below. | |
131 | ||
5dcf458a | 132 | #setup_xfail arm-*-elf |
358a5502 | 133 | setup_xfail i?86-*-freebsd* |
5dcf458a NC |
134 | #setup_xfail strongarm-*-elf |
135 | #setup_xfail thumb-*-elf | |
8535ca75 | 136 | setup_xfail mcore-*-elf |
d49560a9 | 137 | setup_xfail mips-sgi-irix6* |
1b19eb81 | 138 | setup_xfail "sh64-*-*" |
252b5132 | 139 | |
d52f9762 AM |
140 | # The undefined test fails on 31 bit s/390 because the address of the |
141 | # function `this_function_is_not_defined' is stored in the literal pool of | |
142 | # the function. Therefore the line number in the error message is 8 instead | |
143 | # of 9. On 64 bit s/390 this works because of the new brasl instruction that | |
144 | # doesn't need a literal pool entry. | |
1e9f9630 | 145 | setup_xfail s390-*-* |
d52f9762 | 146 | |
252b5132 | 147 | checkund $ml $testline |