ld/testsuite/ld-undefined/undefined.exp

   1 # Test that the linker reports undefined symbol errors correctly.
   2 # By Ian Lance Taylor, Cygnus Support
   3 #
   4 #   Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
   5 #   Free Software Foundation, Inc.
   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 $testline
  38     return
  39 }
  40
  41 catch "exec rm -f tmpdir/undefined" exec_output
  42
  43 set flags [big_or_little_endian]
  44
  45 # Using -e start prevents the SunOS linker from trying to build a
  46 # shared library.
  47 send_log "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o\n"
  48 verbose "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o"
  49
  50 catch "exec $ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o" exec_output
  51 send_log "$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
  64 set mu "undefined reference to `this_function_is_not_defined'"
  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
  75 # With dwarf-2, we can't get the function in which the reference
  76 # occurs; see below.
  77 setup_xfail "hppa*64*-*-*"
  78 setup_xfail "mn10300-*-elf"
  79 setup_xfail "sh-*-*"
  80
  81 set mf "tmpdir/undefined.o: In function `function':"
  82 checkund $mf $testfn
  83
  84 # COFF SH gets this test wrong--it reports line 10, because although
  85 # the jump is at line 9, the function address, and the reloc, is
  86 # stored at the end of the function.
  87 setup_xfail "sh-*-*"
  88
  89 # ARM PE defaults to using stabs debugging, which we can't handle for
  90 # a COFF file.
  91 #setup_xfail "arm*-*-pe*"
  92 #setup_xfail "thumb*-*-pe*"
  93
  94 # Just doesn't work for PA ELF.  No clue why.
  95 setup_xfail "hppa*-*-*elf*"
  96
  97 set ml "undefined.c:9: undefined reference to `this_function_is_not_defined'"
  98 # With targets that use elf/dwarf2, such as the arm-elf and thumb-elf
  99 # toolchains, the code in bfd/elf.c:_bfd_elf_find_nearest_line() is called
 100 # in order to locate the file name/line number where the undefined
 101 # reference occurs.  Unfortunately this tries to use the dwarf2 debug
 102 # information held in the .debug_info section.  This section contains a series
 103 # of comp_unit structures, each of which has a low/high address range
 104 # representing the span of memory locations covered by that structure.  The
 105 # structures also index into other structures held in the .debug_line section
 106 # and together they can translate memory locations back into file/function/line
 107 # number addresses in the source code.  Since the information about the memory
 108 # region covered by a comp_unit is only determined at link time, the low/high
 109 # addresses in the .debug_info section and the line addresses in the .debug_line
 110 # section are computed by generating relocs against known symbols in the object
 111 # code.
 112 #
 113 # When the undefined reference is detected, the relocs in the dwarf2
 114 # debug sections have not yet been resolved, so the low/high addresses and the
 115 # line number address are all set at zero.  Thus when _bfd_elf_find_nearest_line()
 116 # calls _bfd_dwarf2_find_nearest_line() no comp_unit can be found which
 117 # actually covers the address where the reference occured, and so
 118 # _bfd_elf_find_nearest_line() fails.
 119 #
 120 # The upshot of all of this, is that the error message reported by the
 121 # linker, instead of having a source file name & line number as in:
 122 #
 123 #   undefined.c:9: undefined reference to `this_function_is_not_defined'
 124 #
 125 # has an object file & section address instead:
 126 #
 127 #   undefined.0(.text+0xc): undefined reference to `this_function_is_not_defined'
 128 #
 129 # hence the xfails below.
 130
 131 #setup_xfail arm-*-elf
 132 setup_xfail i?86-*-freebsd*
 133 #setup_xfail strongarm-*-elf
 134 #setup_xfail thumb-*-elf
 135 setup_xfail mcore-*-elf
 136 setup_xfail mips-sgi-irix6*
 137
 138 checkund $ml $testline