sysdeps/nacl/nacl-after-link.sh

   1 #!/bin/sh
   2 # Script to validate NaCl binaries after linking.
   3
   4 # Copyright (C) 2015-2017 Free Software Foundation, Inc.
   5 # This file is part of the GNU C Library.
   6
   7 # The GNU C Library is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU Lesser General Public
   9 # License as published by the Free Software Foundation; either
  10 # version 2.1 of the License, or (at your option) any later version.
  11
  12 # The GNU C Library 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 GNU
  15 # Lesser General Public License for more details.
  16
  17 # You should have received a copy of the GNU Lesser General Public
  18 # License along with the GNU C Library; if not, see
  19 # <http://www.gnu.org/licenses/>.
  20
  21 # See sysdeps/nacl/Makefile for how this script is invoked.
  22 READELF="$1"
  23 binary="$2"
  24
  25 if [ -z "$NACL_SDK_ROOT" ]; then
  26   echo >&2 "$0: NACL_SDK_ROOT must be set in the environment"
  27   exit 77
  28 fi
  29
  30 ncval="${NACL_SDK_ROOT}/tools/ncval"
  31
  32 if [ ! -x "$ncval" ]; then
  33   echo >&2 "$0: No ncval binary in $ncval"
  34   exit 77
  35 fi
  36
  37 "${READELF}" -Wl "$binary" | awk '
  38 BEGIN { saw_load = saw_text = 0 }
  39 $1 == "LOAD" {
  40   saw_load = 1;
  41   if (/ R.E /) saw_code = 1;
  42 }
  43 END {
  44   exit (saw_code ? 11 : saw_load ? 22 : 1);
  45 }
  46 '
  47 case $? in
  48 11)
  49   # We saw a code segment, so we can try ncval.
  50   ;;
  51 22)
  52   # We saw LOAD segments but none of them were code.
  53   echo >&2 "+++ No code: $binary"
  54   exit 0
  55   ;;
  56 *)
  57   # Something funny going on.
  58   echo >&2 "*** Failed to analyze: $binary"
  59   exit 2
  60   ;;
  61 esac
  62
  63 if "$ncval" "$binary"; then
  64   echo >&2 "+++ Validated: $binary"
  65   exit 0
  66 else
  67   echo >&2 "*** Validation failed: $binary"
  68   exit 2
  69 fi