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