1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
#!/bin/sh
# shellcheck disable=SC2086,SC2119,SC2120
# shellcheck source=../conf/default.conf
. "${0%/*}/../conf/default.conf"
usage( ) {
>&2 cat <<EOF
check_opcodes: [options] [ -a <arch> ] <package>
possible optons:
-h|--help: Show this help page
-a|--architecture: architecture family to check against, one of
i486, i686, pentium3 (meaning target architecture
the package should be runnable on)
-v|--verbose: Verbose output, print result of check for logs
-d|--debug: Debug output, used for development and testing
EOF
exit 1
}
VERBOSE=0
DEBUG=0
EXIT_CODE=0
verbose( ) {
if test $VERBOSE = 1; then
echo "$@"
fi
}
debug( ) {
if test $DEBUG = 1; then
echo "$@"
fi
}
err( ) {
echo "ERROR: $*"
EXIT_CODE=1
}
tmp_dir=$(mktemp -d "${work_dir}/tmp.check-opcodes.XXXXXX")
trap 'rm -rf --one-file-system "${tmp_dir:?}"' EXIT
ARCH=i686
while getopts ":vda:h-:" opt; do
case $opt in
-)
case "$OPTARG" in
help)
usage
;;
verbose)
VERBOSE=1
;;
debug)
DEBUG=1
;;
*)
echo "ERROR: Invalid option: --$OPTARG" >&2
usage
;;
esac
;;
h)
usage
;;
v)
VERBOSE=1
;;
d)
DEBUG=1
;;
a)
ARCH=$OPTARG
;;
\?)
echo "ERROR: Invalid option: -$OPTARG" >&2
usage
;;
esac
done
shift $((OPTIND-1))
PACKAGE=$1
if test "x$PACKAGE" = "x"; then
echo "ERROR: Filename of a package required as argument" >&2
usage
exit 1
fi
OPCODE_ARGS=""
case $ARCH in
i486)
OPCODE_ARGS='-r -a 386 -v'
;;
i686)
OPCODE_ARGS='-s MMX -s SSE'
;;
pentium3)
OPCODE_ARGS='-s SSE2 -s SSE3'
;;
*)
echo "ERROR: architecture must currently be one of i486, i686 and pentium3" >&2
usage
exit 1
esac
debug "Unpacking $PACKAGE to $tmp_dir.."
bsdtar --no-fflags -x -C $tmp_dir -f $PACKAGE
debug "Checking for architecture: $ARCH ($OPCODE_ARGS).."
# shellcheck disable=SC2044
for absfile in $(find $tmp_dir \( -regextype grep -regex '.*\.so\(\.[0-9.]\+\)\?' -type f \) -o \( -executable -type f \) ); do
file=$(basename $absfile)
relfile=${absfile#$tmp_dir}
debug "Checking file: $relfile"
if ! readelf -a $absfile > $tmp_dir/$file.elf 2>/dev/null; then
debug "readelf failed, ignoring file"
continue
fi
if ! objdump -f $absfile > $tmp_dir/$file.objdump 2>/dev/null; then
debug "objdump failed, ignoring file"
continue
fi
file $absfile > $tmp_dir/$file.file
arch=$(grep ^architecture $tmp_dir/$file.objdump | sed 's/^architecture: //g' | cut -f 1 -d ,)
case $arch in
i386:x86-64)
arch='x86_64'
;;
i386)
arch='x86'
;;
*)
arch='unknown'
;;
esac
debug " Objdump architecture: $arch"
archelf=$(grep '^ \+Class' $tmp_dir/$file.elf | cut -f 2 -d : | tr -d ' ')
case $archelf in
ELF64)
archelf='x86_64'
;;
ELF32)
archelf='x86'
;;
*)
archelf='unknown'
;;
esac
debug " Readelf architecture: $archelf"
if test $arch != $archelf; then
err "ERROR: $file ambigous architecture information (objdump: $arch, ELF: $archelf)"
fi
if test $arch = "x86_64"; then
err "ERROR: $file is a 64-bit library!"
continue
fi
objdump -M intel -d $absfile > $tmp_dir/$file.asm
bad_opcodes=$(${base_dir}/bin/opcode $OPCODE_ARGS -m 1 < $tmp_dir/$file.asm | wc -l)
if test $bad_opcodes != 0; then
case $ARCH in
i486)
err "$relfile is not built for plain i486 opcodes"
;;
i686)
err "$relfile contains MMX, SSE or newer opcodes"
;;
pentium3)
err "$relfile contains SSE2 or newer opcodes"
;;
esac
if test $DEBUG = 1; then
${base_dir}/bin/opcode $OPCODE_ARGS -B 2 -A 2 < $tmp_dir/$file.asm
fi
else
if test $VERBOSE = 1; then
verbose "OK: $relfile fullfills architecture constraint for $ARCH"
fi
fi
done
exit $EXIT_CODE
|