linux_dsm_epyc7002/arch/x86/entry/syscalls/syscallhdr.sh
Brian Gerst 0872098804 x86/entry: Move max syscall number calculation to syscallhdr.sh
Instead of using an array in asm-offsets to calculate the max syscall
number, calculate it when writing out the syscall headers.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200313195144.164260-9-brgerst@gmail.com
2020-03-21 16:03:21 +01:00

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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
in="$1"
out="$2"
my_abis=`echo "($3)" | tr ',' '|'`
prefix="$4"
offset="$5"
fileguard=_ASM_X86_`basename "$out" | sed \
-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
-e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
echo "#ifndef ${fileguard}"
echo "#define ${fileguard} 1"
echo ""
max=0
while read nr abi name entry ; do
if [ -z "$offset" ]; then
echo "#define __NR_${prefix}${name} $nr"
else
echo "#define __NR_${prefix}${name} ($offset + $nr)"
fi
max=$nr
done
echo ""
echo "#ifdef __KERNEL__"
echo "#define __NR_${prefix}syscall_max $max"
echo "#endif"
echo ""
echo "#endif /* ${fileguard} */"
) > "$out"