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
#!/bin/sh
# Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
set -e
build=.
out=output.a
for i
do
case $i in
-o)
out=$2
shift 2
;;
-b)
build=$2
shift 2
;;
--bti=*)
enable_bti=$(echo $1 | sed 's/--bti=\(.*\)/\1/')
shift 1
;;
--asflags=*)
asflags=$(echo $1 | sed 's/--asflags=\(.*\)/\1/')
shift 1
;;
--)
shift
break
;;
-*)
echo usage: genwrappers.sh [-o output] [-b dir] file ... >&2
exit 1
;;
esac
done
awk -v BTI=$enable_bti '
{sub(/[:blank:]*#.*/,"")}
!/^$/ && $NF != "patch" && $NF != "reserved" {
if (BTI == 1)
print $1*8, $2, $3
else
print $1*4, $2, $3}' "$@" |
while read idx lib sym
do
file=$build/${lib}_$sym
cat <<EOF > $file.s
.globl $sym
$sym:
EOF
if [ $enable_bti = 1 ]
then
echo "\tbti\tjc" >> $file.s
fi
cat <<EOF >> $file.s
ldr x17, =jmptbl
mov x16, #$idx
ldr x17, [x17]
add x16, x16, x17
br x16
EOF
${CROSS_COMPILE}as ${asflags} -o $file.o $file.s
done
${CROSS_COMPILE}ar -rc $out $build/*.o