binutils-gdb/ld/testsuite/ld-shared/shared.exp

# Expect script for ld-shared tests
#   Copyright (C) 1994-2025 Free Software Foundation, Inc.
#
# 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 Ian Lance Taylor (ian@cygnus.com)
#

# Make sure that ld can generate ELF shared libraries.
# Note that linking against ELF shared libraries is tested by the
# bootstrap test.

# Check to see if the C compiler works
if { ![check_compiler_available] } {
    return
}

# Skip targets where -shared is not supported
if { ![check_shared_lib_support] } {
    return
}

# This test can only be run on a couple of ELF platforms.
# Square bracket expressions seem to confuse istarget.
if { ![istarget hppa*64*-*-hpux*] \
     && ![istarget hppa*-*-linux*] \
     && ![istarget i?86-*-elf*] \
     && ![istarget i?86-*-linux*] \
     && ![istarget i?86-*-gnu*] \
     && ![istarget ia64-*-elf*] \
     && ![istarget ia64-*-linux*] \
     && ![istarget m68k-*-linux*] \
     && ![istarget mips*-*-irix5*] \
     && ![istarget mips*-*-linux*] \
     && ![istarget powerpc*-*-elf*] \
     && ![istarget powerpc*-*-linux*] \
     && ![istarget powerpc*-*-sysv4*] \
     && ![istarget sparc*-*-elf] \
     && ![istarget sparc*-*-solaris2*] \
     && ![istarget sparc*-*-linux*] \
     && ![istarget arm*-*-linux*] \
     && ![istarget alpha*-*-linux*] \
     && ![is_xcoff_format] \
     && ![istarget s390*-*-linux*] \
     && ![istarget aarch64*-*-linux*] \
     && ![istarget x86_64-*-linux*] } {
    return
}

set tmpdir tmpdir
set SHCFLAG ""
set shared_needs_pic "no"

# Disable all sanitizers.
set old_CFLAGS "$CFLAGS_FOR_TARGET"
append CFLAGS_FOR_TARGET " $NOSANITIZE_CFLAGS"

if { [is_xcoff_format] } {
    # Not all the useful features are available with AIX shared
    # libraries by default.
    # We can manage to simulate some of them with export/import
    # files but the overriding of shared library functions or
    # variables by the main program doesn't seem possible.
    # We avoid testing those features.
    set SHCFLAG "-DXCOFF_TEST"

    # In order to avoid listing every symbols in an export file,
    # the export will be done with -bexpall flag.
    # However for imports, we must create the import file.
    set file [open $tmpdir/xcoff-shared.imp w]
    puts $file "#! ."
    puts $file mainvar
    puts $file main_called
    close $file
}

if [istarget arm*-*-linux*] {
    # On ARM section anchors can change the symbol pre-emptability for
    # non-PIC shared libraries, causing these tests to fail.  Turn section
    # anchors off.
    set SHCFLAG "-fno-section-anchors"

    # On targets that have MOVW the compiler will emit relocations which
    # the linker doesn't support when compiling -shared without -fpic.  The
    # test to find out whether we want to XFAIL the non-PIC tests requires
    # a compile - so we pre-calculate it here.  We also note that this can
    # only affect arm*-*-*eabi* targets as the old ABI doesn't support v7.
    if [istarget arm*-*-*eabi*] {
	set file [open $tmpdir/movw-detect.c w]
	puts $file "void foo(void) { __asm (\"movw r0, #0\"); }"
	close $file
	if [run_host_cmd_yesno "$CC_FOR_TARGET" "$CFLAGS_FOR_TARGET -c $tmpdir/movw-detect.c -o $tmpdir/movw-detect.o"] {
	    set shared_needs_pic "yes"
	}
    }
}

# The test procedure.
proc shared_test { progname testname main sh1 sh2 dat args } {
    global CC_FOR_TARGET
    global srcdir
    global subdir
    global exec_output
    global host_triplet
    global tmpdir

    if [llength $args] { set shldflags [lindex $args 0] } else { set shldflags "" }
    if { [llength $args] >= 2 } { set ldflags [lindex $args 1] } else { set ldflags "" }

    # Build the shared library.
    set shared -shared
    if { [is_xcoff_format] } {
	# On AIX, setup imports and exports.
	append shared " -Wl,-bexpall -Wl,-bI:$tmpdir/xcoff-shared.imp"
    }
    if { [is_elf_format] && [check_shared_lib_support] } {
	append shared " -Wl,-z,notext"
    }
    if {![ld_link $CC_FOR_TARGET $tmpdir/$progname.so "$shared $shldflags $tmpdir/$sh1 $tmpdir/$sh2"]} {
        fail "$testname"
    	return
    }

    # Link against the shared library.  Use -rpath so that the
    # dynamic linker can locate the shared library at runtime.
    # On AIX, we must include /lib in -rpath, as otherwise the loader
    # can not find -lc.
    set rpath $tmpdir
    set exportflag ""
    if { [is_xcoff_format] } {
	set rpath /lib:$tmpdir
	set exportflag " -Wl,-bexpall"
    }
    if ![ld_link $CC_FOR_TARGET $tmpdir/$progname "-Wl,-rpath,$rpath $ldflags $tmpdir/$main $tmpdir/$progname.so $exportflag"] {
    	fail "$testname"
    	return
    }

    if ![isnative] {
	unsupported $testname
	return
    }

    # Run the resulting program
    send_log "$tmpdir/$progname >$tmpdir/$progname.out\n"
    verbose "$tmpdir/$progname >$tmpdir/$progname.out"
    catch "exec $tmpdir/$progname >$tmpdir/$progname.out" exec_output
    if ![string match "" $exec_output] then {
	send_log "$exec_output\n"
	verbose "$exec_output"
	fail "$testname"
    	return
    }

    send_log "diff $tmpdir/$progname.out $srcdir/$subdir/$dat.dat\n"
    verbose "diff $tmpdir/$progname.out $srcdir/$subdir/$dat.dat"
    catch "exec diff $tmpdir/$progname.out $srcdir/$subdir/$dat.dat" exec_output
    set exec_output [prune_warnings $exec_output]

    if {![string match "" $exec_output]} then {
	send_log "$exec_output\n"
	verbose "$exec_output"
	fail "$testname"
        return
    }

    pass "$testname"
}

# Old version of GCC for MIPS default to enabling -fpic
# and get confused if it is used on the command line.
if { [istarget mips*-*-*] && ! [at_least_gcc_version 4 3] } then {
    set picflag ""
} else {
    # Unfortunately, the gcc argument is -fpic and the cc argument is
    # -KPIC.  We have to try both.
    set picflag "-fpic"
    send_log "$CC_FOR_TARGET $picflag\n"
    verbose "$CC_FOR_TARGET $picflag"
    catch "exec $CC_FOR_TARGET $picflag" exec_output
    send_log "$exec_output\n"
    verbose "--" "$exec_output"
    if { [string match "*illegal option*" $exec_output] \
	 || [string match "*option ignored*" $exec_output] \
	 || [string match "*unrecognized option*" $exec_output] \
	 || [string match "*passed to ld*" $exec_output] } {
	set picflag "-KPIC"
    }
}
verbose "Using $picflag to compile PIC code"

# Compile the main program.
global PLT_CFLAGS NOPIE_CFLAGS NOPIE_LDFLAGS
verbose "Using $NOPIE_CFLAGS to compile and $NOPIE_LDFLAGS to link non PIC code"
if ![ld_compile "$CC_FOR_TARGET $NOPIE_CFLAGS $SHCFLAG" $srcdir/$subdir/main.c $tmpdir/mainnp.o] {
    unsupported "shared (non PIC)"
    unsupported "shared"
} else {
    # The shared library is composed of two files.  First compile them
    # without using -fpic.  That should work on an ELF system,
    # although it will be less efficient because the dynamic linker
    # will need to do more relocation work.  However, note that not
    # using -fpic will cause some of the tests to return different
    # results.  Make sure that PLT is used since PLT is expected.
    if { ![ld_compile "$CC_FOR_TARGET $PLT_CFLAGS $NOPIE_CFLAGS $SHCFLAG" $srcdir/$subdir/sh1.c $tmpdir/sh1np.o]
	 || ![ld_compile "$CC_FOR_TARGET $PLT_CFLAGS $NOPIE_CFLAGS $SHCFLAG" $srcdir/$subdir/sh2.c $tmpdir/sh2np.o] } {
	unsupported "shared (non PIC)"
    } else { if { [is_xcoff_format] } {
	shared_test shnp "shared (non PIC)" mainnp.o sh1np.o sh2np.o xcoff "" $NOPIE_LDFLAGS
    } else {
	# Solaris defaults to -z text.
	setup_xfail "*-*-solaris2*"
	setup_xfail "ia64-*-linux*"
	setup_xfail "alpha*-*-linux*"
	setup_xfail "powerpc-*-linux-musl"
	setup_xfail "powerpc64*-*-*"
	if { ![istarget hppa*64*-*-linux*] } {
	    setup_xfail "hppa*-*-linux*"
	}
	if { [istarget sparc*-*-linux*] && [is_elf64 $tmpdir/mainnp.o] } {
	    setup_xfail "sparc*-*-linux*"
	}
	if { [is_elf64 $tmpdir/mainnp.o] } {
	    setup_xfail "x86_64-*-linux*"
	}
	setup_xfail "x86_64-*-linux-gnux32"
	setup_xfail "s390x-*-linux*"
	if [ string match $shared_needs_pic "yes" ] {
	    setup_xfail "arm*-*-linux*"
	}
	setup_xfail "aarch64*-*-linux*"
	shared_test shnp "shared (non PIC)" mainnp.o sh1np.o sh2np.o shared "" $NOPIE_LDFLAGS

	# Test ELF shared library relocations with a non-zero load
	# address for the library.  Near as I can tell, the R_*_RELATIVE
	# relocations for various targets are broken in the case where
	# the load address is not zero (which is the default).
	setup_xfail "*-*-linux*libc1"
	setup_xfail "powerpc*-*-linux*"
	setup_xfail "ia64-*-linux*"
	setup_xfail "alpha*-*-linux*"
	setup_xfail "mips*-*-linux*"
	if { ![istarget hppa*64*-*-linux*] } {
	    setup_xfail "hppa*-*-linux*"
	}
	if { [istarget sparc*-*-linux*] && [is_elf64 $tmpdir/mainnp.o] } {
	    setup_xfail "sparc*-*-linux*"
	}
	if { [is_elf64 $tmpdir/mainnp.o] } {
	    setup_xfail "x86_64-*-linux*"
	}
	setup_xfail "x86_64-*-linux-gnux32"
	setup_xfail "s390x-*-linux*"
	if [ string match $shared_needs_pic "yes" ] {
	    setup_xfail "arm*-*-linux*"
	}
	setup_xfail "aarch64*-*-linux*"
	# Solaris defaults to -z text.
	setup_xfail "*-*-solaris2*"
	shared_test shnp "shared (non PIC, load offset)" \
		mainnp.o sh1np.o sh2np.o shared \
		"-Wl,-T,$srcdir/$subdir/elf-offset.ld,--hash-style=sysv" $NOPIE_LDFLAGS
    } }

    # Now compile the code using -fpic.

    if { ![ld_compile "$CC_FOR_TARGET $SHCFLAG $picflag" $srcdir/$subdir/sh1.c $tmpdir/sh1p.o]
	 || ![ld_compile "$CC_FOR_TARGET $SHCFLAG $picflag" $srcdir/$subdir/sh2.c $tmpdir/sh2p.o] } {
	unsupported "shared"
    } else {
	if { [is_xcoff_format] } {
	    shared_test shp "shared" mainnp.o sh1p.o sh2p.o xcoff "" $NOPIE_LDFLAGS
	} else {
	    shared_test shp "shared" mainnp.o sh1p.o sh2p.o shared "" $NOPIE_LDFLAGS
	    ld_compile "$CC_FOR_TARGET $NOPIE_CFLAGS -DSYMBOLIC_TEST $SHCFLAG" $srcdir/$subdir/main.c $tmpdir/mainnp.o
	    ld_compile "$CC_FOR_TARGET -DSYMBOLIC_TEST $SHCFLAG $picflag" $srcdir/$subdir/sh1.c $tmpdir/sh1p.o
	    shared_test shp "shared -Bsymbolic" mainnp.o sh1p.o sh2p.o symbolic "-Bsymbolic" $NOPIE_LDFLAGS
	    ld_compile "$CC_FOR_TARGET $NOPIE_CFLAGS $SHCFLAG" $srcdir/$subdir/main.c $tmpdir/mainnp.o
	    ld_compile "$CC_FOR_TARGET $SHCFLAG $picflag" $srcdir/$subdir/sh1.c $tmpdir/sh1p.o
	}
    }
}

# Now do the same tests again, but this time compile main.c PIC.
if ![ld_compile "$CC_FOR_TARGET $SHCFLAG $picflag" $srcdir/$subdir/main.c $tmpdir/mainp.o] {
    unsupported "shared (PIC main, non PIC so)"
    unsupported "shared (PIC main)"
} else {
    if { [file exists $tmpdir/sh1np.o ] && [ file exists $tmpdir/sh2np.o ] } {
        if { [is_xcoff_format] } {
	    shared_test shmpnp "shared (PIC main, non PIC so)" mainp.o sh1np.o sh2np.o xcoff "" $NOPIE_LDFLAGS
	} else {
	    # Solaris defaults to -z text.
	    setup_xfail "*-*-solaris2*"
	    setup_xfail "ia64-*-linux*"
	    setup_xfail "alpha*-*-linux*"
	    setup_xfail "powerpc-*-linux-musl"
	    setup_xfail "powerpc64*-*-*"
	    if { ![istarget hppa*64*-*-linux*] } {
		setup_xfail "hppa*-*-linux*"
	    }
	    if { [istarget sparc*-*-linux*] && [is_elf64 $tmpdir/mainp.o] } {
		setup_xfail "sparc*-*-linux*"
	    }
	    if { [is_elf64 $tmpdir/mainp.o] } {
		setup_xfail "x86_64-*-linux*"
	    }
	    setup_xfail "x86_64-*-linux-gnux32"
	    setup_xfail "s390x-*-linux*"
	    if [ string match $shared_needs_pic "yes" ] {
		setup_xfail "arm*-*-linux*"
	    }
	    setup_xfail "aarch64*-*-linux*"
	    shared_test shmpnp "shared (PIC main, non PIC so)" mainp.o sh1np.o sh2np.o shared "" $NOPIE_LDFLAGS
	}
    } else {
	unsupported "shared (PIC main, non PIC so)"
    }

    if { [file exists $tmpdir/sh1p.o ] && [ file exists $tmpdir/sh2p.o ] } {
        if { [is_xcoff_format] } {
	    shared_test shmpp "shared (PIC main)" mainp.o sh1p.o sh2p.o xcoff "" $NOPIE_LDFLAGS
	} else {
	    shared_test shmpp "shared (PIC main)" mainp.o sh1p.o sh2p.o shared "" $NOPIE_LDFLAGS
	}
    } else {
	unsupported "shared (PIC main)"
    }
}

set CFLAGS_FOR_TARGET "$old_CFLAGS"