mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
e492d2f8ac
Since undefined IFUNC symbol is treated as normal FUNC symbol, don't abort on undefined IFUNC symbol in the second PLT. bfd/ PR ld/21401 * elf64-x86-64.c (elf_x86_64_finish_dynamic_symbol): Don't abort on on undefined IFUNC symbol in the second PLT. ld/ PR ld/21401 * testsuite/ld-ifunc/ifunc.exp: Add a libtest-2-now.so test with -z now.
531 lines
15 KiB
Plaintext
531 lines
15 KiB
Plaintext
# Expect script for linker support of IFUNC symbols and relocations.
|
|
#
|
|
# Copyright (C) 2009-2017 Free Software Foundation, Inc.
|
|
# Contributed by Red Hat.
|
|
#
|
|
# 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.
|
|
#
|
|
# Written by Nick Clifton <nickc@redhat.com>
|
|
|
|
|
|
# IFUNC support has only been implemented for the ix86, x86_64, powerpc,
|
|
# aarch64, sparc, and S/390 so far.
|
|
if {!(([istarget "i?86-*-*"]
|
|
|| [istarget "x86_64-*-*"]
|
|
|| [istarget "powerpc*-*-*"]
|
|
|| [istarget "aarch64*-*-*"]
|
|
|| [istarget "sparc*-*-*"]
|
|
|| [istarget "s390*-*-*"])
|
|
&& ([istarget "*-*-elf*"]
|
|
|| [istarget "*-*-nacl*"]
|
|
|| (([istarget "*-*-linux*"]
|
|
|| [istarget "*-*-gnu*"])
|
|
&& ![istarget "*-*-*aout*"]
|
|
&& ![istarget "*-*-*oldld*"]))) } {
|
|
verbose "IFUNC tests not run - target does not support IFUNC"
|
|
return
|
|
}
|
|
|
|
# Skip targets where -shared is not supported
|
|
|
|
if ![check_shared_lib_support] {
|
|
return
|
|
}
|
|
|
|
# We need a working compiler. (Strictly speaking this is
|
|
# not true, we could use target specific assembler files).
|
|
if { [which $CC] == 0 } {
|
|
verbose "IFUNC tests not run - no compiler available"
|
|
return
|
|
}
|
|
|
|
# A procedure to check the OS/ABI field in the ELF header of a binary file.
|
|
proc check_osabi { binary_file expected_osabi } {
|
|
global READELF
|
|
global READELFFLAGS
|
|
|
|
catch "exec $READELF $READELFFLAGS --file-header $binary_file > readelf.out" got
|
|
|
|
if ![string match "" $got] then {
|
|
verbose "proc check_osabi: Readelf produced unexpected out processing $binary_file: $got"
|
|
return 0
|
|
}
|
|
|
|
if { ![regexp "\n\[ \]*OS/ABI:\[ \]*(.+)\n\[ \]*ABI" \
|
|
[file_contents readelf.out] nil osabi] } {
|
|
verbose "proc check_osabi: Readelf failed to extract an ELF header from $binary_file"
|
|
return 0
|
|
}
|
|
|
|
if { $osabi == $expected_osabi } {
|
|
return 1
|
|
}
|
|
|
|
verbose "Expected OSABI: $expected_osabi, Obtained osabi: $osabi"
|
|
|
|
return 0
|
|
}
|
|
|
|
# A procedure to confirm that a file contains the IFUNC symbol.
|
|
# Returns -1 upon error, 0 if the symbol was not found and 1 if it was found.
|
|
proc contains_ifunc_symbol { binary_file } {
|
|
global READELF
|
|
global READELFFLAGS
|
|
|
|
catch "exec $READELF $READELFFLAGS --symbols $binary_file > readelf.out" got
|
|
|
|
if ![string match "" $got] then {
|
|
verbose "proc contains_ifunc_symbol: Readelf produced unexpected out processing $binary_file: $got"
|
|
return -1
|
|
}
|
|
|
|
# Look for a line like this:
|
|
# 58: 0000000000400600 30 IFUNC GLOBAL DEFAULT 12 library_func2
|
|
# with perhaps some other info between the visibility and section
|
|
|
|
if { ![regexp ".*\[ \]*IFUNC\[ \]+GLOBAL\[ \]+DEFAULT .* \[UND0-9\]+\[ \]+library_func2\n" [file_contents readelf.out]] } {
|
|
return 0
|
|
}
|
|
|
|
return 1
|
|
}
|
|
|
|
# A procedure to confirm that a file contains the R_*_IRELATIVE
|
|
# relocation.
|
|
# Returns -1 upon error, 0 if the relocation was not found and 1 if
|
|
# it was found.
|
|
proc contains_irelative_reloc { binary_file } {
|
|
global READELF
|
|
global READELFFLAGS
|
|
|
|
catch "exec $READELF $READELFFLAGS --relocs --wide $binary_file > readelf.out" got
|
|
|
|
if ![string match "" $got] then {
|
|
verbose "proc contains_irelative_reloc: Readelf produced unexpected out processing $binary_file: $got"
|
|
return -1
|
|
}
|
|
|
|
# Look for a line like this:
|
|
# 0000000000600ab0 0000000000000025 R_X86_64_IRELATIVE 000000000040061c
|
|
# 080496f4 0000002a R_386_IRELATIVE
|
|
|
|
|
|
if { ![regexp "\[0-9a-f\]+\[ \]+\[0-9a-f\]+\[ \]+R_\[_0-9A-Z\]+_IREL(|ATIVE)\[ \]*\[0-9a-f\]*\n" [file_contents readelf.out]] } {
|
|
return 0
|
|
}
|
|
|
|
return 1
|
|
}
|
|
|
|
# A procedure to confirm that a file contains a relocation that references an IFUNC symbol.
|
|
# Returns -1 upon error, 0 if the reloc was not found and 1 if it was found.
|
|
proc contains_ifunc_reloc { binary_file } {
|
|
global READELF
|
|
global READELFFLAGS
|
|
|
|
catch "exec $READELF $READELFFLAGS --relocs $binary_file > readelf.out" got
|
|
|
|
if ![string match "" $got] then {
|
|
verbose "proc contains_ifunc_reloc: Readelf produced unexpected out processing $binary_file: $got"
|
|
return -1
|
|
}
|
|
|
|
if [string match "" [file_contents readelf.out]] then {
|
|
verbose "No relocs found in $binary_file"
|
|
return 0
|
|
}
|
|
|
|
if { ![regexp "\\(\\)" [file_contents readelf.out]] } {
|
|
return 0
|
|
}
|
|
|
|
return 1
|
|
}
|
|
|
|
set fails 0
|
|
|
|
# Create the object files, libraries and executables.
|
|
if ![ld_compile "$CC -c -fPIC" "$srcdir/$subdir/prog.c" "tmpdir/shared_prog.o"] {
|
|
fail "Could not create a PIC object file"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -c" "$srcdir/$subdir/prog.c" "tmpdir/static_prog.o"] {
|
|
fail "Could not create a non-PIC object file"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -c -fPIC -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/shared_ifunc.o"] {
|
|
fail "Could not create a PIC object file containing an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -c -DWITH_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_ifunc.o"] {
|
|
fail "Could not create a non-PIC object file containing an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -c -DWITHOUT_IFUNC" "$srcdir/$subdir/lib.c" "tmpdir/static_noifunc.o"] {
|
|
fail "Could not create an ordinary non-PIC object file"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_assemble $as "$srcdir/ld-elf/empty.s" "tmpdir/empty.o"] {
|
|
fail "Could not create an empty object file"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -c" "$srcdir/$subdir/test-1.c" "tmpdir/test-1.o"] {
|
|
fail "Could not create test-1.o"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_compile "$CC -fPIC -c" "$srcdir/$subdir/test-2.c" "tmpdir/test-2.o"] {
|
|
fail "Could not create test-2.o"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
if { $fails != 0 } {
|
|
return
|
|
}
|
|
|
|
if ![ld_link $ld "tmpdir/libshared_ifunc.so" "-shared tmpdir/shared_ifunc.o"] {
|
|
fail "Could not create a shared library containing an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ar_simple_create $ar "" "tmpdir/libifunc.a" "tmpdir/static_ifunc.o"] {
|
|
fail "Could not create a static library containing an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
if { $fails != 0 } {
|
|
return
|
|
}
|
|
|
|
if ![ld_link $CC "tmpdir/dynamic_prog" "-Wl,--no-as-needed,-rpath=./tmpdir,-Bdynamic -Ltmpdir tmpdir/shared_prog.o -lshared_ifunc"] {
|
|
fail "Could not link a dynamic executable"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $CC "tmpdir/local_prog" "-Wl,--no-as-needed,-rpath=./tmpdir -Ltmpdir tmpdir/static_prog.o -lifunc"] {
|
|
fail "Could not link a dynamic executable using local ifunc"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $CC "tmpdir/static_prog" "-static -Ltmpdir tmpdir/static_prog.o -lifunc"] {
|
|
fail "Could not link a static executable"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $ld "tmpdir/static_nonifunc_prog" "-static tmpdir/empty.o"] {
|
|
fail "Could not link a non-ifunc using static executable"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $CC "tmpdir/test-1" "-Wl,--no-as-needed,-rpath=./tmpdir tmpdir/test-1.o tmpdir/libshared_ifunc.so"] {
|
|
fail "Could not link test-1"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $ld "tmpdir/libtest-2.so" "-shared tmpdir/test-2.o"] {
|
|
fail "Could not link libtest-2.so"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if ![ld_link $ld "tmpdir/libtest-2-now.so" "-shared -z now tmpdir/test-2.o"] {
|
|
fail "Could not link libtest-2-now.so"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
if { $fails == 0 } {
|
|
pass "Building ifunc binaries"
|
|
set fails 0
|
|
} else {
|
|
return
|
|
}
|
|
|
|
# Check the executables and shared libraries
|
|
#
|
|
# The linked ifunc using executables and the shared library containing
|
|
# ifunc should have an OSABI field of GNU. The linked non-ifunc using
|
|
# executable should have an OSABI field of NONE (aka System V).
|
|
|
|
case $target_triplet in {
|
|
{ hppa*-*-linux* } { set expected_none {UNIX - GNU} }
|
|
default { set expected_none {UNIX - System V} }
|
|
}
|
|
|
|
if {! [check_osabi tmpdir/libshared_ifunc.so {UNIX - GNU}]} {
|
|
fail "Shared libraries containing ifunc does not have an OS/ABI field of GNU"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {! [check_osabi tmpdir/local_prog {UNIX - GNU}]} {
|
|
fail "Local ifunc-using executable does not have an OS/ABI field of GNU"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {! [check_osabi tmpdir/static_prog {UNIX - GNU}]} {
|
|
fail "Static ifunc-using executable does not have an OS/ABI field of GNU"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {! [check_osabi tmpdir/dynamic_prog $expected_none]} {
|
|
fail "Dynamic ifunc-using executable does not have an OS/ABI field of $expected_none"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {! [check_osabi tmpdir/static_nonifunc_prog $expected_none]} {
|
|
fail "Static non-ifunc-using executable does not have an OS/ABI field of $expected_none"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
# The linked ifunc using executables and the shared library containing
|
|
# ifunc should contain an IFUNC symbol. The non-ifunc using executable
|
|
# should not.
|
|
|
|
if {[contains_ifunc_symbol tmpdir/libshared_ifunc.so] != 1} {
|
|
fail "Shared libraries containing ifunc does not contain an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/local_prog] != 1} {
|
|
fail "Local ifunc-using executable does not contain an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/static_prog] != 1} {
|
|
fail "Static ifunc-using executable does not contain an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/dynamic_prog] != 0} {
|
|
fail "Dynamic ifunc-using executable contains an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/static_nonifunc_prog] != 0} {
|
|
fail "Static non-ifunc-using executable contains an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/test-1] != 0} {
|
|
fail "test-1 contains IFUNC symbols"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/libtest-2.so] != 0} {
|
|
fail "libtest-2.so contains IFUNC symbols"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_symbol tmpdir/libtest-2-now.so] != 0} {
|
|
fail "libtest-2-now.so contains IFUNC symbols"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
# The linked ifunc using executables and shared libraries should contain
|
|
# a dynamic reloc referencing the IFUNC symbol. (Even the static
|
|
# executable which should have a dynamic section created for it). The
|
|
# non-ifunc using executable should not.
|
|
|
|
if {[contains_irelative_reloc tmpdir/libshared_ifunc.so] != 1} {
|
|
fail "ifunc-using shared library does not contain R_*_IRELATIVE relocation"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_irelative_reloc tmpdir/local_prog] != 1} {
|
|
fail "Local ifunc-using executable does not contain R_*_IRELATIVE relocation"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_irelative_reloc tmpdir/static_prog] != 1} {
|
|
fail "Static ifunc-using executable does not contain R_*_IRELATIVE relocation"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_reloc tmpdir/dynamic_prog] != 0} {
|
|
fail "Dynamic ifunc-using executable contains a reloc against an IFUNC symbol"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
if {[contains_ifunc_reloc tmpdir/static_nonifunc_prog] == 1} {
|
|
fail "Static non-ifunc-using executable contains a reloc against an IFUNC symbol!"
|
|
set fails [expr $fails + 1]
|
|
}
|
|
|
|
if { $fails == 0 } {
|
|
pass "Checking ifunc binaries"
|
|
}
|
|
|
|
run_cc_link_tests [list \
|
|
[list \
|
|
"Build libpr16467a.so" \
|
|
"-shared -Wl,--version-script=pr16467a.map" \
|
|
"-fPIC" \
|
|
{ pr16467a.c } \
|
|
{} \
|
|
"libpr16467a.so" \
|
|
] \
|
|
[list \
|
|
"Build libpr16467b.a" \
|
|
"" \
|
|
"-fPIC" \
|
|
{ pr16467b.c } \
|
|
{} \
|
|
"libpr16467b.a" \
|
|
] \
|
|
[list \
|
|
"Build libpr16467b.so" \
|
|
"-shared tmpdir/pr16467b.o tmpdir/libpr16467a.so \
|
|
-Wl,--version-script=pr16467b.map" \
|
|
"-fPIC" \
|
|
{ dummy.c } \
|
|
{} \
|
|
"libpr16467b.so" \
|
|
] \
|
|
[list \
|
|
"Build libpr16467c.a" \
|
|
"" \
|
|
"" \
|
|
{ pr16467c.c } \
|
|
{} \
|
|
"libpr16467c.a" \
|
|
] \
|
|
]
|
|
|
|
run_ld_link_exec_tests [list \
|
|
[list \
|
|
"Common symbol override ifunc test 1a" \
|
|
"-static" \
|
|
"" \
|
|
{ ifunc-common-1a.c ifunc-common-1b.c } \
|
|
"ifunc-common-1a" \
|
|
"ifunc-common-1.out" \
|
|
"-g" \
|
|
] \
|
|
[list \
|
|
"Common symbol override ifunc test 1b" \
|
|
"-static" \
|
|
"" \
|
|
{ ifunc-common-1b.c ifunc-common-1a.c } \
|
|
"ifunc-common-1b" \
|
|
"ifunc-common-1.out" \
|
|
"-g" \
|
|
] \
|
|
]
|
|
|
|
set test_list [lsort [glob -nocomplain $srcdir/$subdir/*.d]]
|
|
foreach t $test_list {
|
|
# We need to strip the ".d", but can leave the dirname.
|
|
verbose [file rootname $t]
|
|
run_dump_test [file rootname $t]
|
|
}
|
|
|
|
# Run-time tests which require working IFUNC support.
|
|
if { ![check_ifunc_available] } {
|
|
return
|
|
}
|
|
|
|
run_cc_link_tests [list \
|
|
[list \
|
|
"Build ifunc-lib.so" \
|
|
"-shared" \
|
|
"-fPIC" \
|
|
{ ifunc-lib.c } \
|
|
{} \
|
|
"libifunc-lib.so" \
|
|
] \
|
|
]
|
|
|
|
run_ld_link_exec_tests [list \
|
|
[list \
|
|
"Run pr16467" \
|
|
"-Wl,--no-as-needed tmpdir/pr16467c.o tmpdir/libpr16467b.so tmpdir/libpr16467a.so" \
|
|
"" \
|
|
{ dummy.c } \
|
|
"pr16467" \
|
|
"pr16467.out" \
|
|
"" \
|
|
] \
|
|
[list \
|
|
"Run ifunc-main" \
|
|
"-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
|
|
"" \
|
|
{ ifunc-main.c } \
|
|
"ifunc-main" \
|
|
"ifunc-main.out" \
|
|
] \
|
|
[list \
|
|
"Run ifunc-main with -fpic" \
|
|
"-Wl,--no-as-needed tmpdir/libifunc-lib.so" \
|
|
"" \
|
|
{ ifunc-main.c } \
|
|
"ifunc-main" \
|
|
"ifunc-main.out" \
|
|
"-fpic" \
|
|
] \
|
|
]
|
|
|
|
# Run-time tests which require working ifunc attribute support.
|
|
if { ![check_ifunc_attribute_available] } {
|
|
return
|
|
}
|
|
|
|
run_cc_link_tests [list \
|
|
[list \
|
|
"Build pr18808a.o" \
|
|
"" \
|
|
"" \
|
|
{ pr18808a.c } \
|
|
"" \
|
|
"" \
|
|
] \
|
|
[list \
|
|
"Build libpr18808.so" \
|
|
"-shared" \
|
|
"-fPIC -O2 -g" \
|
|
{ pr18808b.c } \
|
|
{} \
|
|
"libpr18808.so" \
|
|
] \
|
|
[list \
|
|
"Build pr18841a.o" \
|
|
"" \
|
|
"" \
|
|
{ pr18841a.c } \
|
|
"" \
|
|
"" \
|
|
] \
|
|
[list \
|
|
"Build libpr18841b.so" \
|
|
"-shared" \
|
|
"-fPIC -O0 -g" \
|
|
{ pr18841b.c } \
|
|
{} \
|
|
"libpr18841b.so" \
|
|
] \
|
|
[list \
|
|
"Build libpr18841c.so" \
|
|
"-shared" \
|
|
"-fPIC -O0 -g" \
|
|
{ pr18841c.c } \
|
|
{} \
|
|
"libpr18841c.so" \
|
|
] \
|
|
]
|
|
|
|
run_ld_link_exec_tests [list \
|
|
[list \
|
|
"Run pr18808" \
|
|
"-Wl,--no-as-needed tmpdir/pr18808a.o tmpdir/libpr18808.so" \
|
|
"" \
|
|
{ dummy.c } \
|
|
"pr18808" \
|
|
"pr18808.out" \
|
|
] \
|
|
[list \
|
|
"Run pr18841 with libpr18841b.so" \
|
|
"-Wl,--no-as-needed tmpdir/pr18841a.o tmpdir/libpr18841b.so" \
|
|
"" \
|
|
{ dummy.c } \
|
|
"pr18841b" \
|
|
"pr18841.out" \
|
|
] \
|
|
[list \
|
|
"Run pr18841 with libpr18841c.so" \
|
|
"-Wl,--as-needed tmpdir/pr18841a.o tmpdir/libpr18841c.so" \
|
|
"" \
|
|
{ dummy.c } \
|
|
"pr18841c" \
|
|
"pr18841.out" \
|
|
] \
|
|
]
|