# Test that the linker reports undefined symbol errors correctly.
# By Ian Lance Taylor, Cygnus Support
#
-# Copyright (C) 1995 Free Software Foundation
+# Copyright (C) 1995-2015 Free Software Foundation, Inc.
#
-# This file is free software; you can redistribute it and/or modify
+# 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 2 of the License, or
+# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
set testund "undefined"
set testfn "undefined function"
set testline "undefined line"
-if { [which $CC] == 0 } {
+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] {
+if ![ld_compile "$CC -g" $srcdir/$subdir/undefined.c tmpdir/undefined.o] {
+ verbose "Unable to compile test file!" 1
unresolved $testund
unresolved $testfn
unresolved $testline
return
}
-catch "exec rm -f tmpdir/undefined" exec_output
+remote_file host delete "tmpdir/undefined"
+
+set flags [big_or_little_endian]
# Using -e start prevents the SunOS linker from trying to build a
# shared library.
-send_log "$ld -e start -o tmpdir/undefined tmpdir/undefined.o\n"
-verbose "$ld -e start -o tmpdir/undefined tmpdir/undefined.o"
+send_log "$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"]
-catch "exec $ld -e start -o tmpdir/undefined tmpdir/undefined.o" exec_output
send_log "$exec_output\n"
verbose "$exec_output"
}
}
-set mu "undefined reference to `this_function_is_not_defined'"
+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 "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':"
+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-*-*"
+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*"
+ # 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-*-*"
+# Fails for the MSP430 because it uses SYM_DIFF relocs but it does
+# not provide a special_function for handling them. If optimization
+# is enabled then this test passes because function()'s prologue is
+# eliminated.
+setup_xfail "msp430-*-*"
+
+# 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*-*-*
-set ml "undefined.c:9: undefined reference to `this_function_is_not_defined'"
checkund $ml $testline
projects / deliverable / binutils-gdb.git / blobdiff