| # Test that the linker reports undefined symbol errors correctly. |
| # By Ian Lance Taylor, Cygnus Support |
| # |
| # Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| # 2005, 2007, 2008, 2010, 2011 Free Software Foundation, Inc. |
| # |
| # This file is part of the GNU Binutils. |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 3 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write to the Free Software |
| # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| # MA 02110-1301, USA. |
| |
| set testund "undefined" |
| set testfn "undefined function" |
| set testline "undefined line" |
| |
| if { ![is_remote host] && [which $CC] == 0 } { |
| verbose "Could not find C compiler!" 1 |
| untested $testund |
| untested $testfn |
| untested $testline |
| return |
| } |
| |
| if ![ld_compile "$CC -g" $srcdir/$subdir/undefined.c tmpdir/undefined.o] { |
| verbose "Unable to compile test file!" 1 |
| unresolved $testund |
| unresolved $testfn |
| unresolved $testline |
| return |
| } |
| |
| remote_file host delete "tmpdir/undefined" |
| |
| set flags [big_or_little_endian] |
| |
| # Using -e start prevents the SunOS linker from trying to build a |
| # shared library. |
| send_log "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o\n" |
| set exec_output [run_host_cmd "$ld" "-e start $flags -o tmpdir/undefined tmpdir/undefined.o"] |
| |
| send_log "$exec_output\n" |
| verbose "$exec_output" |
| |
| proc checkund { string testname } { |
| global exec_output |
| |
| if [string match "*$string*" $exec_output] { |
| pass $testname |
| } else { |
| fail $testname |
| } |
| } |
| |
| set mu "undefined reference to `*this_function_is_not_defined'" |
| checkund $mu $testund |
| |
| # ARM PE defaults to using stabs debugging, which we can't handle for |
| # a COFF file. |
| #setup_xfail "arm*-*-pe*" |
| |
| # For Xtensa on GNU Linux systems (or any other system where PIC code is |
| # always used), the address of the undefined function is in a literal pool |
| # outside the function, so that both the "undefined function" and "undefined |
| # line" tests fail. |
| setup_xfail xtensa*-*-linux* |
| |
| set mf "tmpdir/undefined.o* In function `function':" |
| checkund $mf $testfn |
| |
| if ![is_elf_format] { |
| # COFF SH gets this test wrong--it reports line 10, because although |
| # the jump is at line 9, the function address, and the reloc, is |
| # stored at the end of the function. |
| setup_xfail "sh-*-*" |
| |
| # ARM PE defaults to using stabs debugging, which we can't handle for |
| # a COFF file. |
| #setup_xfail "arm*-*-pe*" |
| } |
| |
| set ml "undefined.c:9: undefined reference to `*this_function_is_not_defined'" |
| # With targets that use elf/dwarf2, such as the arm-elf |
| # toolchain, the code in bfd/elf.c:_bfd_elf_find_nearest_line() is called |
| # in order to locate the file name/line number where the undefined |
| # reference occurs. Unfortunately this tries to use the dwarf2 debug |
| # information held in the .debug_info section. This section contains a series |
| # of comp_unit structures, each of which has a low/high address range |
| # representing the span of memory locations covered by that structure. The |
| # structures also index into other structures held in the .debug_line section |
| # and together they can translate memory locations back into file/function/line |
| # number addresses in the source code. Since the information about the memory |
| # region covered by a comp_unit is only determined at link time, the low/high |
| # addresses in the .debug_info section and the line addresses in the .debug_line |
| # section are computed by generating relocs against known symbols in the object |
| # code. |
| # |
| # When the undefined reference is detected, the relocs in the dwarf2 |
| # debug sections have not yet been resolved, so the low/high addresses and the |
| # line number address are all set at zero. Thus when _bfd_elf_find_nearest_line() |
| # calls _bfd_dwarf2_find_nearest_line() no comp_unit can be found which |
| # actually covers the address where the reference occured, and so |
| # _bfd_elf_find_nearest_line() fails. |
| # |
| # The upshot of all of this, is that the error message reported by the |
| # linker, instead of having a source file name & line number as in: |
| # |
| # undefined.c:9: undefined reference to `this_function_is_not_defined' |
| # |
| # has an object file & section address instead: |
| # |
| # undefined.0(.text+0xc): undefined reference to `this_function_is_not_defined' |
| # |
| # hence the xfails below. |
| |
| setup_xfail mcore-*-elf |
| setup_xfail mep-*-* |
| setup_xfail mips-sgi-irix6* |
| setup_xfail "sh64-*-*" |
| |
| # The undefined test fails on 31 bit s/390 because the address of the |
| # function `this_function_is_not_defined' is stored in the literal pool of |
| # the function. Therefore the line number in the error message is 8 instead |
| # of 9. On 64 bit s/390 this works because of the new brasl instruction that |
| # doesn't need a literal pool entry. |
| setup_xfail s390-*-* |
| |
| # See comments above for Xtensa. |
| setup_xfail xtensa*-*-linux* |
| setup_xfail hppa*64*-*-* |
| |
| checkund $ml $testline |