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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>
66 lines
1.1 KiB
Bash
Executable file
66 lines
1.1 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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output=jmptbl.s
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build=.
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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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output=$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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--)
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shift
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break
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;;
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-*)
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echo usage: gentbl.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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tmp=`mktemp`
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trap "rm -f $$.tmp" EXIT INT QUIT
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rm -f $output
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# Pre-process include files
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awk '!/^$/ && !/[:blank:]*#.*/{
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if (NF == 2 && $1 == "include") {
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while ((getline line < $2) > 0)
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if (line !~ /^$/ && line !~ /[:blank:]*#.*/)
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print line
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close($2)
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} else
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print
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}' "$@" |
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awk -v OFS="\t" '
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BEGIN{print "#index\tlib\tfunction\t[patch]"}
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{print NR-1, $0}' | tee $build/jmptbl.i |
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awk -v OFS="\n" -v BTI=$enable_bti '
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BEGIN {print "\t.text",
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"\t.globl\tjmptbl",
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"jmptbl:"}
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{sub(/[:blank:]*#.*/,"")}
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!/^$/ {
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if (BTI == 1)
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print "\tbti\tj"
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if ($3 == "reserved")
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print "\t.word\t0x0"
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else
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print "\tb\t" $3}' > $$.tmp &&
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mv $$.tmp $output
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