# Test handling of weak undefined symbols
-# Copyright 2001, 2002, 2004, 2005, 2007
-# Free Software Foundation, Inc.
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.
-set testname "weak undefined symbols"
-
-# This test only works for ELF targets. It ought to work for some
-# a.out targets, but it doesn't.
-
-if { ![istarget *-*-sysv4*] \
- && ![istarget *-*-unixware*] \
- && ![istarget *-*-elf*] \
- && ![istarget *-*-eabi*] \
- && ![istarget hppa*64*-*-hpux*] \
- && ![istarget *-*-linux*] \
- && ![istarget *-*-irix5*] \
- && ![istarget *-*-irix6*] \
- && ![is_pecoff_format] \
- && ![istarget *-*-solaris2*] } then {
- unsupported $testname
- return
-}
+# The linker should accept references to undefined weaks without error,
+# and resolve them to zero in a static executable. Ought to work for
+# some a.out targets too.
+set testname "weak undefined data symbols"
-if { [istarget *-*-linux*aout*] \
- || [istarget *-*-linux*oldld*] } {
+if { ![is_elf_format] && ![is_pecoff_format] } then {
unsupported $testname
- return
+} elseif {![ld_assemble $as $srcdir/$subdir/weak-undef.s \
+ tmpdir/weak-undef.o]} then {
+ # It's OK if .weak doesn't work on this target.
+ unresolved $testname
+} elseif {![ld_link $ld tmpdir/weak-undef \
+ "tmpdir/weak-undef.o -T $srcdir/$subdir/weak-undef.t"]} then {
+ # Weak symbols are broken for non-i386 PE targets.
+ if {! [istarget i?86-*-*]} {
+ setup_xfail *-*-pe*
+ }
+ setup_xfail pj-*-*
+ fail $testname
+} elseif {![is_remote host] && [which $objdump] == 0} then {
+ unresolved $testname
+} else {
+ set exec_output [run_host_cmd "$objdump" "-s tmpdir/weak-undef"]
+ set exec_output [prune_warnings $exec_output]
+ verbose -log $exec_output
+
+ set output_regexp ".*Contents of section .data:.*0000 00000000 11111111.*"
+
+ if {[regexp $output_regexp $exec_output]} then {
+ pass $testname
+ } else {
+ fail $testname
+ }
}
-# Weak symbols are broken for non-i386 PE targets.
-if {! [istarget i?86-*-*]} {
- setup_xfail *-*-pe*
+proc undef_weak_so { testname opts passval } {
+ global ld
+ global nm
+
+ if {![ld_link $ld tmpdir/weak-fundef.so \
+ "$opts tmpdir/weak-fundef.o"]} then {
+ fail $testname
+ } elseif {![is_remote host] && [which $nm] == 0} then {
+ unresolved $testname
+ } else {
+ set exec_output [run_host_cmd "$nm" "-D tmpdir/weak-fundef.so"]
+ set exec_output [prune_warnings $exec_output]
+
+ set output_regexp ".*w undef_weak_fun.*"
+ if {[regexp $output_regexp $exec_output] == $passval} then {
+ pass $testname
+ } else {
+ fail $testname
+ }
+ return 1
+ }
+ return 0
}
-setup_xfail hppa64-*-* pj-*-*
+proc undef_weak_exe { testname opts passval } {
+ global ld
+ global nm
-if {! [ld_assemble $as $srcdir/$subdir/weak-undef.s tmpdir/weak-undef.o]} then {
- # It's OK if .weak doesn't work on this target.
- unresolved $testname
- return
+ if {![ld_link $ld tmpdir/weak-fundef \
+ "$opts tmpdir/weak-fundef.o tmpdir/weak-fundef.so"]} then {
+ fail $testname
+ } elseif {![is_remote host] && [which $nm] == 0} then {
+ unresolved $testname
+ } else {
+ set exec_output [run_host_cmd "$nm" "-D tmpdir/weak-fundef"]
+ set exec_output [prune_warnings $exec_output]
+
+ set output_regexp ".*w undef_weak_fun.*"
+ if {[regexp $output_regexp $exec_output] == $passval} then {
+ pass $testname
+ } else {
+ fail $testname
+ }
+ }
}
-# The linker should accept references to undefined weaks without error,
-# and resolve them to zero.
+# When linking a shared lib, weak undefined symbols should become dynamic.
+set testname "weak undefined function symbols in shared lib"
-set output_regexp \
-".*Contents of section .data:.*0000 00000000 11111111.*"
+set asflags ""
+switch -glob $target_triplet {
+ aarch64* -
+ arm* -
+ powerpc* { set asflags "--defsym BL=1" }
+ hppa* { set asflags "--defsym HPPA=1" }
+ i\[3-7\]86* -
+ x86_64* { set asflags "--defsym CALLPLT=1" }
+}
-if {! [ld_simple_link $ld tmpdir/weak-undef "$flags tmpdir/weak-undef.o -T $srcdir/$subdir/weak-undef.t"] } then {
+if { $asflags == "" || ![is_elf_format] || ![check_shared_lib_support]} then {
+ unsupported $testname
+} elseif {![ld_assemble $as "$asflags $srcdir/$subdir/weak-fundef.s" \
+ tmpdir/weak-fundef.o]} then {
fail $testname
-} else {
- if {![is_remote host] && [which $objdump] == 0} then {
- unresolved $testname
- return
+} elseif { [undef_weak_so $testname "--shared" 1] } then {
+
+ # When linking a dynamic executable, weak undefined symbols become dynamic.
+ set testname "weak undefined function symbols in dynamic exe"
+ undef_weak_exe $testname "--no-as-needed" 1
+
+ # Find -z options supported by the default emulation
+ set emul [get_target_emul]
+ set cmd [list "$ld --help 2>&1 | sed -e '1,/^$emul:/d;/^\[^ \]*:/,\$d'"]
+ set status [remote_exec host [concat sh -c $cmd]]
+ if { [lindex $status 0] != 0 } {
+ verbose -log "$cmd exited with status [lindex $status 0]"
}
+ set emulopt [lindex $status 1]
- set exec_output [run_host_cmd "$objdump" "-s tmpdir/weak-undef"]
- set exec_output [prune_warnings $exec_output]
- verbose -log $exec_output
+ if { [string first "dynamic-undefined-weak" $emulopt] >= 0 } {
+ # -z dynamic-undefined-weak is supported. Let's see if it works.
- if {[regexp $output_regexp $exec_output]} then {
- pass $testname
- } else {
- fail $testname
+ set testname "weak undefined functions in shared lib, no dyn undef weak"
+ undef_weak_so $testname "--shared -z nodynamic-undefined-weak" 0
+
+ set testname "weak undefined functions in shared lib, dyn undef weak"
+ undef_weak_so $testname "--shared -z dynamic-undefined-weak" 1
+
+ set testname "weak undefined functions in dynamic exe, no dyn undef weak"
+ undef_weak_exe $testname "-z nodynamic-undefined-weak" 0
+
+ set testname "weak undefined functions in dynamic exe, dyn undef weak"
+ undef_weak_exe $testname "-z dynamic-undefined-weak" 1
+
+ set testname "weak undefined functions in pie, no dyn undef weak"
+ undef_weak_exe $testname "-pie -z nodynamic-undefined-weak" 0
+
+ set testname "weak undefined functions in pie, dyn undef weak"
+ undef_weak_exe $testname "-pie -z dynamic-undefined-weak" 1
}
}
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