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c6a3a81d19
Currently, syscall{hdr,tbl}.sh sorts the entire syscall table, but you
can assume it is already sorted by the syscall number.
The generated syscall table does not work if the same syscall number
appears twice. Check it in the script.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
98 lines
1.9 KiB
Bash
Executable file
98 lines
1.9 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Generate a syscall number header.
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#
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# Each line of the syscall table should have the following format:
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#
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# NR ABI NAME [NATIVE] [COMPAT]
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#
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# NR syscall number
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# ABI ABI name
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# NAME syscall name
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# NATIVE native entry point (optional)
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# COMPAT compat entry point (optional)
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set -e
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usage() {
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echo >&2 "usage: $0 [--abis ABIS] [--emit-nr] [--offset OFFSET] [--prefix PREFIX] INFILE OUTFILE" >&2
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echo >&2
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echo >&2 " INFILE input syscall table"
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echo >&2 " OUTFILE output header file"
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echo >&2
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echo >&2 "options:"
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echo >&2 " --abis ABIS ABI(s) to handle (By default, all lines are handled)"
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echo >&2 " --emit-nr Emit the macro of the number of syscalls (__NR_syscalls)"
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echo >&2 " --offset OFFSET The offset of syscall numbers"
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echo >&2 " --prefix PREFIX The prefix to the macro like __NR_<PREFIX><NAME>"
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exit 1
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}
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# default unless specified by options
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abis=
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emit_nr=
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offset=
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prefix=
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while [ $# -gt 0 ]
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do
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case $1 in
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--abis)
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abis=$(echo "($2)" | tr ',' '|')
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shift 2;;
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--emit-nr)
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emit_nr=1
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shift 1;;
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--offset)
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offset=$2
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shift 2;;
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--prefix)
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prefix=$2
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shift 2;;
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-*)
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echo "$1: unknown option" >&2
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usage;;
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*)
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break;;
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esac
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done
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if [ $# -ne 2 ]; then
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usage
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fi
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infile="$1"
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outfile="$2"
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guard=_UAPI_ASM_$(basename "$outfile" |
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sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
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-e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g')
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grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | {
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echo "#ifndef $guard"
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echo "#define $guard"
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echo
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max=0
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while read nr abi name native compat ; do
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max=$nr
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if [ -n "$offset" ]; then
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nr="($offset + $nr)"
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fi
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echo "#define __NR_$prefix$name $nr"
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done
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if [ -n "$emit_nr" ]; then
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echo
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echo "#ifdef __KERNEL__"
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echo "#define __NR_${prefix}syscalls $(($max + 1))"
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echo "#endif"
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fi
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echo
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echo "#endif /* $guard */"
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} > "$outfile"
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