binutils-gdb/ld/testsuite/ld-scripts/crossref.exp

# Test NOCROSSREFS in a linker script.
# By Ian Lance Taylor, Cygnus Support.
#   Copyright (C) 2000-2023 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.

set test1 "NOCROSSREFS 1"
set test2 "NOCROSSREFS 2"
set test3 "NOCROSSREFS 3"
set test4 "NOCROSSREFS_TO 1"
set test5 "NOCROSSREFS_TO 2"
set test6 "NOCROSSREFS_TO 3"
set test7 "NOCROSSREFS_TO 4"

if { ![check_compiler_available] } {
    untested $test1
    untested $test2
    untested $test3
    untested $test4
    untested $test5
    untested $test6
    untested $test7
    return
}

# Pass -fplt to CC since -fno-plt doesn't work with NOCROSSREFS tests.
# Also add $NOPIE_CFLAGS since PIE doesn't work NOCROSSREFS tests.
set old_CFLAGS "$CFLAGS_FOR_TARGET"
append CFLAGS_FOR_TARGET " $PLT_CFLAGS $NOPIE_CFLAGS"

# Xtensa targets currently default to putting literal values in a separate
# section and that requires linker script support, so put literals in text.
if [istarget xtensa*-*-*] {
    append CFLAGS_FOR_TARGET " -mtext-section-literals"
}

# Prevent the use of the MeP's small data area which references a symbol
# called __sdabase which will not be defined by our test linker scripts.
if [istarget mep*-*-elf] {
    append CFLAGS_FOR_TARGET " -mtiny=0"
}

# The .dsbt section and __c6xabi_DSBT_BASE are not defined in our test
# linker scripts.
if [istarget tic6x*-*-*] {
    append CFLAGS_FOR_TARGET " -mno-dsbt -msdata=none"
}

if { ![ld_compile "$CC_FOR_TARGET $NOSANITIZE_CFLAGS $NOLTO_CFLAGS" "$srcdir/$subdir/cross1.c" tmpdir/cross1.o] \
     || ![ld_compile "$CC_FOR_TARGET $NOSANITIZE_CFLAGS $NOLTO_CFLAGS" "$srcdir/$subdir/cross2.c" tmpdir/cross2.o] } {
    unsupported $test1
    unsupported $test2
    set CFLAGS_FOR_TARGET "$old_CFLAGS"
    return
}

set flags [big_or_little_endian]

# arc-elf32 requires the symbol __SDATA_BEGIN__ to always be present.
if [istarget arc*-*-elf32] {
    append flags " --defsym __SDATA_BEGIN__=0"
}

if [is_pecoff_format] {
    append flags " --image-base 0"
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross1 -T $srcdir/$subdir/cross1.t tmpdir/cross1.o tmpdir/cross2.o --no-error-rwx-segments"]

set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    fail $test1
} else {
    verbose -log "$exec_output"
    if [regexp "prohibited cross reference from .* to `.*foo' in" $exec_output] {
	pass $test1
    } else {
	fail $test1
    }
}

# Check cross references within a single object.

if { ![ld_compile "$CC_FOR_TARGET $NOSANITIZE_CFLAGS $NOLTO_CFLAGS" "$srcdir/$subdir/cross3.c" tmpdir/cross3.o] } {
    unsupported $test2
    set CFLAGS_FOR_TARGET "$old_CFLAGS"
    return
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross2 -T $srcdir/$subdir/cross2.t tmpdir/cross3.o --no-error-rwx-segments"]
set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    fail $test2
} else {
    verbose -log "$exec_output"
    if [regexp "prohibited cross reference from .* to `.*' in" $exec_output] {
	pass $test2
    } else {
	fail $test2
    }
}

# Check cross references for ld -r

if { ![ld_compile "$CC_FOR_TARGET $NOSANITIZE_CFLAGS $NOLTO_CFLAGS" "$srcdir/$subdir/cross4.c" tmpdir/cross4.o] } {
    unsupported $test3
    set CFLAGS_FOR_TARGET "$old_CFLAGS"
    return
}

if ![ld_relocate $ld tmpdir/cross3-partial.o "tmpdir/cross1.o tmpdir/cross4.o"] {
    fail $test3
    set CFLAGS_FOR_TARGET "$old_CFLAGS"
    return
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross3 -T $srcdir/$subdir/cross3.t tmpdir/cross3-partial.o tmpdir/cross2.o --no-error-rwx-segments"]

set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    pass $test3
} else {
    verbose -log "$exec_output"
    fail $test3
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross4 -T $srcdir/$subdir/cross4.t tmpdir/cross4.o --no-error-rwx-segments"]
set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    pass $test4
} else {
    verbose -log "$exec_output"
    fail $test4
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross5 -T $srcdir/$subdir/cross5.t tmpdir/cross4.o --no-error-rwx-segments"]
set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    fail $test5
} else {
    verbose -log "$exec_output"
    if [regexp "prohibited cross reference from .* to `.*' in" $exec_output] {
	pass $test5
    } else {
	fail $test5
    }
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross6 -T $srcdir/$subdir/cross6.t tmpdir/cross3.o --no-error-rwx-segments"]
set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    pass $test6
} else {
    verbose -log "$exec_output"
    fail $test6
}

set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross7 -T $srcdir/$subdir/cross7.t tmpdir/cross3.o --no-error-rwx-segments"]
set exec_output [prune_warnings $exec_output]

regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output

if [string match "" $exec_output] then {
    fail $test7
} else {
    verbose -log "$exec_output"
    if [regexp "prohibited cross reference from .* to `.*' in" $exec_output] {
	pass $test7
    } else {
	fail $test7
    }
}

set CFLAGS_FOR_TARGET "$old_CFLAGS"