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bbb24f611c
When TF-A is compiled with BTI enabled, the branches in the ROMLIB jumptable must be preceded by a "bti j" instruction. Moreover, when the additional "bti" instruction is inserted, the jumptable entries have a distance of 8 bytes between them instead of 4. Hence, the wrappers are also modified accordinly. If TF-A is compiled without BTI enabled, the ROMLIB jumptable and wrappers are generated as before. Change-Id: Iaa59897668f8e59888d39046233300c2241d8de7 Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>
71 lines
1 KiB
Bash
Executable file
71 lines
1 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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set -e
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build=.
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out=output.a
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for i
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do
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case $i in
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-o)
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out=$2
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shift 2
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;;
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-b)
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build=$2
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shift 2
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;;
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--bti=*)
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enable_bti=$(echo $1 | sed 's/--bti=\(.*\)/\1/')
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shift 1
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;;
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--asflags=*)
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asflags=$(echo $1 | sed 's/--asflags=\(.*\)/\1/')
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shift 1
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;;
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--)
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shift
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break
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;;
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-*)
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echo usage: genwrappers.sh [-o output] [-b dir] file ... >&2
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exit 1
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;;
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esac
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done
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awk -v BTI=$enable_bti '
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{sub(/[:blank:]*#.*/,"")}
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!/^$/ && $NF != "patch" && $NF != "reserved" {
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if (BTI == 1)
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print $1*8, $2, $3
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else
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print $1*4, $2, $3}' "$@" |
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while read idx lib sym
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do
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file=$build/${lib}_$sym
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cat <<EOF > $file.s
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.globl $sym
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$sym:
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EOF
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if [ $enable_bti = 1 ]
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then
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echo "\tbti\tjc" >> $file.s
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fi
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cat <<EOF >> $file.s
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ldr x17, =jmptbl
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mov x16, #$idx
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ldr x17, [x17]
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add x16, x16, x17
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br x16
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EOF
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${CROSS_COMPILE}as ${asflags} -o $file.o $file.s
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done
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${CROSS_COMPILE}ar -rc $out $build/*.o
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