378 lines
13 KiB
Plaintext
378 lines
13 KiB
Plaintext
# Expect script for linker support of IFUNC symbols and relocations.
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#
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# Copyright 2009, 2010, 2012 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 <nickc@redhat.com>
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# IFUNC support has only been implemented for the ix86, x86_64, powerpc,
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# aarch64 and sparc so far.
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if {!(([istarget "i?86-*-*"]
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|| [istarget "x86_64-*-*"]
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|| [istarget "powerpc*-*-*"]
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|| [istarget "aarch64*-*-*"]
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|| [istarget "sparc*-*-*"])
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&& ([istarget "*-*-elf*"]
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|| [istarget "*-*-nacl*"]
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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 "IFUNC tests not run - target does not support IFUNC"
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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 "IFUNC 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 "IFUNC 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 IFUNC 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_ifunc_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_ifunc_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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# 58: 0000000000400600 30 IFUNC GLOBAL DEFAULT 12 library_func2
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if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT\[ \]+\[UND0-9\]+\[ \]+library_func2\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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# A procedure to confirm that a file contains the R_*_IRELATIVE
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# relocation.
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# Returns -1 upon error, 0 if the relocation was not found and 1 if
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# it was found.
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proc contains_irelative_reloc { binary_file } {
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global READELF
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global READELFFLAGS
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catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
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if ![string match "" $got] then {
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verbose "proc contains_irelative_reloc: 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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# 0000000000600ab0 0000000000000025 R_X86_64_IRELATIVE 000000000040061c
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# 080496f4 0000002a R_386_IRELATIVE
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if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\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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# A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
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# Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
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proc contains_ifunc_reloc { binary_file } {
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global READELF
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global READELFFLAGS
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catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
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if ![string match "" $got] then {
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verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
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return -1
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}
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if [string match "" [file_contents readelf.out]] then {
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verbose "No relocs found in $binary_file"
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return 0
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}
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if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
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return 0
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}
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return 1
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}
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set fails 0
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# Create the object files, libraries and executables.
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if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
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fail "Could not create a PIC object file"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
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fail "Could not create a non-PIC object file"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
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fail "Could not create a PIC object file containing an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
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fail "Could not create a non-PIC object file containing an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
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fail "Could not create an ordinary non-PIC object file"
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set fails [expr $fails + 1]
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}
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if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
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fail "Could not create an empty object file"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
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fail "Could not create test-1.o"
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set fails [expr $fails + 1]
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}
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if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
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fail "Could not create test-2.o"
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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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if ![ld_simple_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
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fail "Could not create a shared library containing an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
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fail "Could not create a static library containing an IFUNC 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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return
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}
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if ![default_ld_link $ld "tmpdir/dynamic_prog" "-Ltmpdir tmpdir/shared_prog.o -Bdynamic -lshared_ifunc -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 ![default_ld_link $ld "tmpdir/local_prog" "-Ltmpdir tmpdir/static_prog.o -lifunc"] {
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fail "Could not link a dynamic executable using local ifunc"
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set fails [expr $fails + 1]
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}
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if ![default_ld_link $ld "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
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fail "Could not link a static executable"
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set fails [expr $fails + 1]
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}
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if ![ld_simple_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
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fail "Could not link a non-ifunc using static executable"
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set fails [expr $fails + 1]
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}
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if ![default_ld_link $ld "tmpdir/test-1" "tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
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fail "Could not link test-1"
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set fails [expr $fails + 1]
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}
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if ![ld_simple_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
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fail "Could not link libtest-2.so"
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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 "Building ifunc binaries"
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set fails 0
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} else {
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return
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}
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# Check the executables and shared libraries
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#
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# The linked ifunc using executables and the shared library containing
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# ifunc should have an OSABI field of GNU. The linked non-ifunc using
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# executable should have an OSABI field of NONE (aka System V).
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if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
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fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
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set fails [expr $fails + 1]
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}
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if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
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fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
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set fails [expr $fails + 1]
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}
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if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} {
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fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
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set fails [expr $fails + 1]
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}
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if {! [check_osabi tmpdir/dynamic_prog {UNIX - System V}]} {
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fail "Dynamic ifunc-using executable 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 {! [check_osabi tmpdir/static_nonifunc_prog {UNIX - System V}]} {
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fail "Static non-ifunc-using executable 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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# The linked ifunc using executables and the shared library containing
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# ifunc should contain an IFUNC symbol. The non-ifunc using executable
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# should not.
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if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
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fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
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fail "Local ifunc-using executable does not contain an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
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fail "Static ifunc-using executable does not contain an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
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fail "Dynamic ifunc-using executable contains an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
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fail "Static non-ifunc-using executable contains an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
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fail "test-1 contains IFUNC symbols"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
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fail "libtest-2.so contains IFUNC symbols"
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set fails [expr $fails + 1]
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}
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# The linked ifunc using executables and shared libraries should contain
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# a dynamic reloc referencing the IFUNC symbol. (Even the static
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# executable which should have a dynamic section created for it). The
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# non-ifunc using executable should not.
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if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
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fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
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set fails [expr $fails + 1]
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}
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if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
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fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
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set fails [expr $fails + 1]
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}
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if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
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fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
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fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
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set fails [expr $fails + 1]
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}
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if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
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fail "Static non-ifunc-using executable contains a reloc against an IFUNC 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 ifunc binaries"
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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/shared_prog.o"
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remote_file host delete "tmpdir/static_prog.o"
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remote_file host delete "tmpdir/shared_ifunc.o"
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remote_file host delete "tmpdir/static_ifunc.o"
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remote_file host delete "tmpdir/static_noifunc.o"
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remote_file host delete "tmpdir/libshared_ifunc.so"
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remote_file host delete "tmpdir/libifunc.a"
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remote_file host delete "tmpdir/dynamic_prog"
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remote_file host delete "tmpdir/local_prog"
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remote_file host delete "tmpdir/static_prog"
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remote_file host delete "tmpdir/static_nonifunc_prog"
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}
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run_ld_link_exec_tests [] [list \
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[list \
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"Common symbol override ifunc test 1a" \
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"-static" \
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"" \
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{ ifunc-common-1a.c ifunc-common-1b.c } \
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"ifunc-common-1a" \
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"ifunc-common-1.out" \
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"-g" \
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] \
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[list \
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"Common symbol override ifunc test 1b" \
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"-static" \
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"" \
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{ ifunc-common-1b.c ifunc-common-1a.c } \
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"ifunc-common-1b" \
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"ifunc-common-1.out" \
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"-g" \
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] \
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]
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set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
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foreach t $test_list {
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# We need to strip the ".d", but can leave the dirname.
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verbose [file rootname $t]
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run_dump_test [file rootname $t]
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}
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