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fc497986 CC |
1 | #!/bin/sh |
2 | ||
3 | # relro_test.sh -- test -z relro | |
4 | ||
2571583a | 5 | # Copyright (C) 2010-2017 Free Software Foundation, Inc. |
fc497986 CC |
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 $LOAD_ALIGN % p" | dc` | |
65 | ||
07aead7b ILT |
66 | if test "$REM" -eq 0; then |
67 | : | |
68 | else | |
fc497986 CC |
69 | echo "PT_GNU_RELRO segment does not end at page boundary." |
70 | exit 1 | |
71 | fi | |
72 | } | |
73 | ||
74 | check relro_test.stdout |