gold/testsuite/relro_test.sh

   1 #!/bin/sh
   2
   3 # relro_test.sh -- test -z relro
   4
   5 # Copyright (C) 2010-2020 Free Software Foundation, Inc.
   6 # Written by Cary Coutant <ccoutant@google.com>.
   7
   8 # This file is part of gold.
   9
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 3 of the License, or
  13 # (at your option) any later version.
  14
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program; if not, write to the Free Software
  22 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  23 # MA 02110-1301, USA.
  24
  25 # This test checks that the PT_GNU_RELRO segment is properly
  26 # aligned and is coincident with the beginning of the data segment.
  27
  28
  29 # Cleans a hexadecimal number for input to dc.
  30 clean_hex()
  31 {
  32   echo "$1" | sed -e 's/0x//' -e 'y/abcdef/ABCDEF/'
  33 }
  34
  35 check()
  36 {
  37   # Get the address and length of the PT_GNU_RELRO segment.
  38   RELRO_START=`grep GNU_RELRO "$1" | awk '{ print $3; }'`
  39   RELRO_LEN=`grep GNU_RELRO "$1" | awk '{ print $6; }'`
  40
  41   if test -z "$RELRO_START"
  42   then
  43     echo "Did not find a PT_GNU_RELRO segment."
  44     exit 1
  45   fi
  46
  47   # Get the address and alignment of the PT_LOAD segment whose address
  48   # matches the PT_GNU_RELRO segment.
  49   LOAD_ALIGN=`grep LOAD "$1" | awk -v A=$RELRO_START '$3 == A { print $NF; }'`
  50   LOAD_LEN=`grep LOAD "$1" | awk -v A=$RELRO_START '$3 == A { print $6; }'`
  51
  52   if test -z "$LOAD_LEN"
  53   then
  54     echo "Did not find a PT_LOAD segment matching the PT_GNU_RELRO segment."
  55     exit 1
  56   fi
  57
  58   # Compute the address of the end of the PT_GNU_RELRO segment,
  59   # modulo the alignment of the PT_LOAD segment.
  60   RELRO_START=`clean_hex "$RELRO_START"`
  61   RELRO_LEN=`clean_hex "$RELRO_LEN"`
  62   LOAD_ALIGN=`clean_hex "$LOAD_ALIGN"`
  63   RELRO_END=`echo "16o 16i $RELRO_START $RELRO_LEN + p" | dc`
  64   REM=`echo "16i $RELRO_END $LOAD_ALIGN % p" | dc`
  65
  66   if test "$REM" -eq 0; then
  67     :
  68   else
  69     echo "PT_GNU_RELRO segment does not end at page boundary."
  70     exit 1
  71   fi
  72 }
  73
  74 check relro_test.stdout