146 lines
5.2 KiB
Plaintext
146 lines
5.2 KiB
Plaintext
# Test that the linker reports undefined symbol errors correctly.
|
|
# By Ian Lance Taylor, Cygnus Support
|
|
#
|
|
# Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
|
|
# Free Software Foundation, Inc.
|
|
#
|
|
# This file 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
set testund "undefined"
|
|
set testfn "undefined function"
|
|
set testline "undefined line"
|
|
|
|
if { [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 $testline
|
|
return
|
|
}
|
|
|
|
catch "exec rm -f tmpdir/undefined" exec_output
|
|
|
|
set flags [big_or_little_endian]
|
|
|
|
# Using -e start prevents the SunOS linker from trying to build a
|
|
# shared library.
|
|
send_log "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o\n"
|
|
verbose "$ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o"
|
|
|
|
catch "exec $ld -e start $flags -o tmpdir/undefined tmpdir/undefined.o" exec_output
|
|
send_log "$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*"
|
|
#setup_xfail "thumb*-*-pe*"
|
|
|
|
# Just doesn't work for PA ELF. No clue why.
|
|
setup_xfail "hppa*-*-*elf*"
|
|
|
|
# With dwarf-2, we can't get the function in which the reference
|
|
# occurs; see below.
|
|
setup_xfail "hppa*64*-*-*"
|
|
setup_xfail "mn10300-*-elf"
|
|
setup_xfail "sh-*-*"
|
|
|
|
set mf "tmpdir/undefined.o: In function `function':"
|
|
checkund $mf $testfn
|
|
|
|
# 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*"
|
|
#setup_xfail "thumb*-*-pe*"
|
|
|
|
# Just doesn't work for PA ELF. No clue why.
|
|
setup_xfail "hppa*-*-*elf*"
|
|
|
|
set ml "undefined.c:9: undefined reference to `this_function_is_not_defined'"
|
|
# With targets that use elf/dwarf2, such as the arm-elf and thumb-elf
|
|
# toolchains, 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 arm-*-elf
|
|
setup_xfail i?86-*-freebsd*
|
|
#setup_xfail strongarm-*-elf
|
|
#setup_xfail thumb-*-elf
|
|
setup_xfail mcore-*-elf
|
|
setup_xfail mips-sgi-irix6*
|
|
|
|
# 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-*-*
|
|
|
|
checkund $ml $testline
|