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# Expect script for linker support of STB_GNU_UNIQUE symbols
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#
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# Copyright 2009, 2010, 2011 Free Software Foundation, Inc.
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# Contributed by Red Hat.
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#
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# This file is part of the GNU Binutils.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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# Written by Nick Clifton
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# Adapted for unique checking by Mark J. Wielaard
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# STB_GNU_UNIQUE support has only been implemented for the ix86, x86_64,
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# arm, powerpc, and sparc so far.
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if {!(([istarget "i?86-*-*"]
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|| [istarget "x86_64-*-*"]
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|| [istarget "arm-*-*"]
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|| [istarget "powerpc*-*-*"]
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|| [istarget "sparc*-*-*"])
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&& ([istarget "*-*-elf*"]
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|| (([istarget "*-*-linux*"]
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|| [istarget "*-*-gnu*"])
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&& ![istarget "*-*-*aout*"]
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&& ![istarget "*-*-*oldld*"]))) } {
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verbose "UNIQUE tests not run - target does not support UNIQUE"
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return
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}
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# We need a native system. FIXME: Strictly speaking this
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# is not true, we just need to know how to create a fully
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# linked executable, including the C and Z libraries, using
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# the linker that is under test.
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if ![isnative] {
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verbose "UNIQUE tests not run - not a native toolchain"
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return
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}
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# We need a working compiler. (Strictly speaking this is
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# not true, we could use target specific assembler files).
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if { [which $CC] == 0 } {
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verbose "UNIQUE tests not run - no compiler available"
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return
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}
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# A procedure to check the OS/ABI field in the ELF header of a binary file.
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proc check_osabi { binary_file expected_osabi } {
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global READELF
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global READELFFLAGS
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catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
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if ![string match "" $got] then {
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verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
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return 0
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}
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if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
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[file_contents readelf.out] nil osabi] } {
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verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
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return 0
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}
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if { $osabi == $expected_osabi } {
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return 1
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}
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verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
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return 0
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}
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# A procedure to confirm that a file contains the UNIQUE symbol.
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# Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
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proc contains_unique_symbol { binary_file } {
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global READELF
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global READELFFLAGS
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catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
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if ![string match "" $got] then {
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verbose "proc contains_unique_symbol: Readelf produced unexpected out processing $binary_file: $got"
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return -1
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}
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# Look for a line like this:
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# 54: 0000000000400474 4 OBJECT UNIQUE DEFAULT 13 a
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if { ![regexp ".*\[ \]*OBJECT\[ \]+UNIQUE\[ \]+DEFAULT\[ \]+\[UND0-9\]+\[ \]+\[ab\]\n" [file_contents readelf.out]] } {
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return 0
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}
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return 1
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}
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set fails 0
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# Create object file containing unique symbol.
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if ![ld_compile "$CC -c" "$srcdir/$subdir/unique.s" "tmpdir/unique.o"] {
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fail "Could not create a unique object"
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set fails [expr $fails + 1]
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}
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# Create object file NOT containing unique symbol.
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if ![ld_compile "$CC -c" "$srcdir/$subdir/unique_empty.s" "tmpdir/unique_empty.o"] {
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fail "Could not create a non-unique object"
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set fails [expr $fails + 1]
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}
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# Create pic object file containing unique symbol.
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if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/unique_shared.s" "tmpdir/unique_shared.o"] {
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fail "Could not create a pic unique object"
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set fails [expr $fails + 1]
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}
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# Create executable containing unique symbol.
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if ![default_ld_link $ld "tmpdir/unique_prog" "tmpdir/unique.o"] {
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fail "Could not link a unique executable"
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set fails [expr $fails + 1]
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}
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# Create shared library containing unique symbol.
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if ![ld_simple_link $ld "tmpdir/libunique_shared.so" "-shared tmpdir/unique_shared.o"] {
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fail "Could not create a shared library containing an unique symbol"
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set fails [expr $fails + 1]
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}
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# Create executable NOT containing unique symbol linked against library.
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if ![default_ld_link $ld "tmpdir/unique_shared_prog" "-Ltmpdir tmpdir/unique_empty.o -Bdynamic -lunique_shared -rpath ./tmpdir"] {
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fail "Could not link a dynamic executable"
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set fails [expr $fails + 1]
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}
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if { $fails != 0 } {
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return
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}
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# Check the object file.
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if {! [check_osabi tmpdir/unique.o {UNIX - Linux}]} {
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fail "Object containing unique does not have an OS/ABI field of LINUX"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/unique.o] != 1} {
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fail "Object containing unique does not contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking unique object"
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}
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# Check the executable.
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if {! [check_osabi tmpdir/unique_prog {UNIX - Linux}]} {
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fail "Executable containing unique does not have an OS/ABI field of LINUX"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/unique_prog] != 1} {
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fail "Executable containing unique does not contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking unique executable"
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}
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# Check the empty object file.
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if {! [check_osabi tmpdir/unique_empty.o {UNIX - System V}]} {
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fail "Object NOT containing unique does not have an OS/ABI field of System V"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/unique_empty.o] == 1} {
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fail "Object NOT containing unique does contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking empty unique object"
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}
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# Check the unique PIC file.
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if {! [check_osabi tmpdir/unique_shared.o {UNIX - Linux}]} {
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fail "PIC Object containing unique does not have an OS/ABI field of LINUX"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/unique_shared.o] != 1} {
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fail "PIC Object containing unique does not contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking unique PIC object"
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}
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# Check the unique shared library.
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if {! [check_osabi tmpdir/libunique_shared.so {UNIX - Linux}]} {
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fail "Shared library containing unique does not have an OS/ABI field of LINUX"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/libunique_shared.so] != 1} {
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fail "Shared library containing unique does not contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking unique PIC object"
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}
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# Check the empty executable linked against unique shared library.
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if {! [check_osabi tmpdir/unique_shared_prog {UNIX - System V}]} {
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fail "Executable NOT containing unique does not have an OS/ABI field of System V"
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set fails [expr $fails + 1]
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}
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if {[contains_unique_symbol tmpdir/unique_shared_prog] == 1} {
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fail "Executable NOT containing unique does contain an UNIQUE symbol"
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set fails [expr $fails + 1]
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}
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if { $fails == 0 } {
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pass "Checking shared empty executable"
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}
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# Clean up, unless we are being verbose, in which case we leave the files available.
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if { $verbose < 1 } {
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remote_file host delete "tmpdir/unique_empty.o"
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remote_file host delete "tmpdir/unique.o"
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remote_file host delete "tmpdir/unique_shared.o"
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remote_file host delete "tmpdir/libunique_shared.so"
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remote_file host delete "tmpdir/unique_prog"
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remote_file host delete "tmpdir/unique_shared_prog"
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}
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