ld/testsuite/ld-undefined/weak-undef.exp

   1 # Test handling of weak undefined symbols
   2 #   Copyright (C) 2001-2017 Free Software Foundation, Inc.
   3 #
   4 # This file is part of the GNU Binutils.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19 # MA 02110-1301, USA.
  20
  21 # The linker should accept references to undefined weaks without error,
  22 # and resolve them to zero in a static executable.  Ought to work for
  23 # some a.out targets too.
  24 set testname "weak undefined data symbols"
  25
  26 if { ![is_elf_format] && ![is_pecoff_format] } then {
  27     unsupported $testname
  28 } elseif {![ld_assemble $as $srcdir/$subdir/weak-undef.s \
  29             tmpdir/weak-undef.o]} then {
  30     # It's OK if .weak doesn't work on this target.
  31     unresolved $testname
  32 } elseif {![ld_link $ld tmpdir/weak-undef \
  33                 "tmpdir/weak-undef.o -T $srcdir/$subdir/weak-undef.t"]} then {
  34     # Weak symbols are broken for non-i386 PE targets.
  35     if {! [istarget i?86-*-*]} {
  36         setup_xfail *-*-pe*
  37     }
  38     setup_xfail pj-*-*
  39     fail $testname
  40 } elseif {![is_remote host] && [which $objdump] == 0} then {
  41     unresolved $testname
  42 } else {
  43     set exec_output [run_host_cmd "$objdump" "-s tmpdir/weak-undef"]
  44     set exec_output [prune_warnings $exec_output]
  45     verbose -log $exec_output
  46
  47     set output_regexp ".*Contents of section .data:.*0000 00000000 11111111.*"
  48
  49     if {[regexp $output_regexp $exec_output]} then {
  50         pass $testname
  51     } else {
  52         fail $testname
  53     }
  54 }
  55
  56 # When linking a shared lib, weak undefined symbols should become dynamic.
  57 set testname "weak undefined function symbols in shared lib"
  58
  59 set asflags ""
  60 switch -glob $target_triplet {
  61     aarch64* -
  62     arm* -
  63     powerpc* { set asflags "--defsym BL=1" }
  64     hppa* { set asflags "--defsym HPPA=1" }
  65     i\[3-7\]86* -
  66     x86_64* { set asflags "--defsym CALLPLT=1" }
  67 }
  68
  69 if { $asflags == "" || ![is_elf_format] || ![check_shared_lib_support]} then {
  70     unsupported $testname
  71 } elseif {![ld_assemble $as "$asflags $srcdir/$subdir/weak-fundef.s" \
  72                 tmpdir/weak-fundef.o]} then {
  73     fail $testname
  74 } elseif {![ld_link $ld tmpdir/weak-fundef.so \
  75             "--shared tmpdir/weak-fundef.o"]} then {
  76     fail $testname
  77 } elseif {![is_remote host] && [which $nm] == 0} then {
  78     unresolved $testname
  79 } else {
  80     set exec_output [run_host_cmd "$nm" "-D tmpdir/weak-fundef.so"]
  81     set exec_output [prune_warnings $exec_output]
  82     verbose -log $exec_output
  83
  84     set output_regexp ".*w undef_weak_fun.*"
  85
  86     if {[regexp $output_regexp $exec_output]} then {
  87         pass $testname
  88     } else {
  89         fail $testname
  90     }
  91
  92     # When linking a dynamic executable, weak undefined symbols become dynamic.
  93     set testname "weak undefined function symbols in dynamic exe"
  94
  95     if {![ld_link $ld tmpdir/weak-fundef \
  96           "--no-as-needed tmpdir/weak-fundef.o tmpdir/weak-fundef.so"]} then {
  97         fail $testname
  98     } else {
  99         set exec_output [run_host_cmd "$nm" "-D tmpdir/weak-fundef"]
 100         set exec_output [prune_warnings $exec_output]
 101         verbose -log $exec_output
 102
 103         if {[regexp $output_regexp $exec_output]} then {
 104             pass $testname
 105         } else {
 106             fail $testname
 107         }
 108     }
 109 }