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      1 # Test NOCROSSREFS in a linker script.
      2 # By Ian Lance Taylor, Cygnus Support.
      3 #   Copyright (C) 2000-2014 Free Software Foundation, Inc.
      4 #
      5 # This file is part of the GNU Binutils.
      6 #
      7 # This program is free software; you can redistribute it and/or modify
      8 # it under the terms of the GNU General Public License as published by
      9 # the Free Software Foundation; either version 3 of the License, or
     10 # (at your option) any later version.
     11 #
     12 # This program is distributed in the hope that it will be useful,
     13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15 # GNU General Public License for more details.
     16 #
     17 # You should have received a copy of the GNU General Public License
     18 # along with this program; if not, write to the Free Software
     19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
     20 # MA 02110-1301, USA.
     21 
     22 set test1 "NOCROSSREFS 1"
     23 set test2 "NOCROSSREFS 2"
     24 set test3 "NOCROSSREFS 3"
     25 
     26 if { ![is_remote host] && [which $CC] == 0 } {
     27     untested $test1
     28     untested $test2
     29     untested $test3
     30     return
     31 }
     32 
     33 global CFLAGS
     34 set old_CFLAGS "$CFLAGS"
     35 
     36 # Xtensa targets currently default to putting literal values in a separate
     37 # section and that requires linker script support, so put literals in text.
     38 if [istarget xtensa*-*-*] {
     39     set CFLAGS "$CFLAGS -mtext-section-literals"
     40 }
     41 
     42 # If we have a compiler that doesn't use/reference dot-symbols, then
     43 # calls to functions reference the .opd section function descriptor.
     44 # This makes NOCROSSREFS rather useless on powerpc64.
     45 if [istarget powerpc64-*-*] {
     46     set CFLAGS "$CFLAGS -mcall-aixdesc"
     47 }
     48 
     49 # Prevent the use of the MeP's small data area which references a symbol
     50 # called __sdabase which will not be defined by our test linker scripts.
     51 if [istarget mep*-*-elf] {
     52     set CFLAGS "-mtiny=0"
     53 }
     54 
     55 # The .dsbt section and __c6xabi_DSBT_BASE are not defined in our test
     56 # linker scripts.
     57 if [istarget tic6x*-*-*] {
     58     set CFLAGS "-mno-dsbt -msdata=none"
     59 }
     60 
     61 if { ![ld_compile $CC "$srcdir/$subdir/cross1.c" tmpdir/cross1.o] \
     62      || ![ld_compile $CC "$srcdir/$subdir/cross2.c" tmpdir/cross2.o] } {
     63     unresolved $test1
     64     unresolved $test2
     65     set CFLAGS "$old_CFLAGS"
     66     return
     67 }
     68 
     69 set flags [big_or_little_endian]
     70 
     71 if [istarget sh64*-*-elf] {
     72     # This is what gcc passes to ld by default.
     73     set flags "-mshelf32"
     74 }
     75 
     76 # IA64 has both ordered and unordered sections in an input file.
     77 setup_xfail ia64-*-*
     78 
     79 set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross1 -T $srcdir/$subdir/cross1.t tmpdir/cross1.o tmpdir/cross2.o"]
     80 
     81 set exec_output [prune_warnings $exec_output]
     82 
     83 regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output
     84 
     85 if [string match "" $exec_output] then {
     86     fail $test1
     87 } else {
     88     verbose -log "$exec_output"
     89     if [regexp "prohibited cross reference from .* to `.*foo' in" $exec_output] {
     90 	pass $test1
     91     } else {
     92 	fail $test1
     93     }
     94 }
     95 
     96 # Check cross references within a single object.
     97 
     98 if { ![ld_compile $CC "$srcdir/$subdir/cross3.c" tmpdir/cross3.o] } {
     99     unresolved $test2
    100     set CFLAGS "$old_CFLAGS"
    101     return
    102 }
    103 
    104 set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross2 -T $srcdir/$subdir/cross2.t tmpdir/cross3.o"]
    105 set exec_output [prune_warnings $exec_output]
    106 
    107 regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output
    108 
    109 if [string match "" $exec_output] then {
    110     fail $test2
    111 } else {
    112     verbose -log "$exec_output"
    113     if [regexp "prohibited cross reference from .* to `.*' in" $exec_output] {
    114 	pass $test2
    115     } else {
    116 	fail $test2
    117     }
    118 }
    119 
    120 # Check cross references for ld -r
    121 
    122 if { ![ld_compile $CC "$srcdir/$subdir/cross4.c" tmpdir/cross4.o] } {
    123     unresolved $test3
    124     set CFLAGS "$old_CFLAGS"
    125     return
    126 }
    127 
    128 if ![ld_relocate $ld tmpdir/cross3-partial.o "tmpdir/cross1.o tmpdir/cross4.o"] {
    129     unresolved $test3
    130     set CFLAGS "$old_CFLAGS"
    131     return
    132 }
    133 
    134 set exec_output [run_host_cmd "$ld" "$flags -o tmpdir/cross3 -T $srcdir/$subdir/cross3.t tmpdir/cross3-partial.o tmpdir/cross2.o"]
    135 
    136 set exec_output [prune_warnings $exec_output]
    137 
    138 regsub -all "(^|\n)($ld: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output
    139 
    140 if [string match "" $exec_output] then {
    141     pass $test3
    142 } else {
    143     verbose -log "$exec_output"
    144     fail $test3
    145 }
    146 
    147 set CFLAGS "$old_CFLAGS"
    148