linux-hardened/arch/x86/syscalls/syscallhdr.sh
H. Peter Anvin 3f86886c72 x86, syscall: Allow syscall offset to be symbolic
Allow the specified syscall offset to be symbolic, e.g. a macro.  For
offset system calls, this if nothing else makes the generated code
easier to read.

Suggested-by: H. J. Lu <hjl.tools@gmail.com>
Link: http://lkml.kernel.org/r/1321569446-20433-7-git-send-email-hpa@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-11-18 17:01:19 -08:00

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#!/bin/sh
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 ${fileguard} 1"
echo ""
while read nr abi name entry ; do
if [ -z "$offset" ]; then
echo "#define __NR_${prefix}${name} $nr"
else
echo "#define __NR_${prefix}${name} ($offset + $nr)"
fi
done
echo ""
echo "#endif /* ${fileguard} */"
) > "$out"