1#!/bin/sh
 2
 3in="$1"
 4out="$2"
 5
 6syscall_macro() {
 7    abi="$1"
 8    nr="$2"
 9    entry="$3"
10
11    # Entry can be either just a function name or "function/qualifier"
12    real_entry="${entry%%/*}"
13    qualifier="${entry:${#real_entry}}"		# Strip the function name
14    qualifier="${qualifier:1}"			# Strip the slash, if any
15
16    echo "__SYSCALL_${abi}($nr, $real_entry, $qualifier)"
17}
18
19emit() {
20    abi="$1"
21    nr="$2"
22    entry="$3"
23    compat="$4"
24
25    if [ "$abi" == "64" -a -n "$compat" ]; then
26	echo "a compat entry for a 64-bit syscall makes no sense" >&2
27	exit 1
28    fi
29
30    if [ -z "$compat" ]; then
31	if [ -n "$entry" ]; then
32	    syscall_macro "$abi" "$nr" "$entry"
33	fi
34    else
35	echo "#ifdef CONFIG_X86_32"
36	if [ -n "$entry" ]; then
37	    syscall_macro "$abi" "$nr" "$entry"
38	fi
39	echo "#else"
40	syscall_macro "$abi" "$nr" "$compat"
41	echo "#endif"
42    fi
43}
44
45grep '^[0-9]' "$in" | sort -n | (
46    while read nr abi name entry compat; do
47	abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
48	if [ "$abi" == "COMMON" -o "$abi" == "64" ]; then
49	    # COMMON is the same as 64, except that we don't expect X32
50	    # programs to use it.  Our expectation has nothing to do with
51	    # any generated code, so treat them the same.
52	    emit 64 "$nr" "$entry" "$compat"
53	elif [ "$abi" == "X32" ]; then
54	    # X32 is equivalent to 64 on an X32-compatible kernel.
55	    echo "#ifdef CONFIG_X86_X32_ABI"
56	    emit 64 "$nr" "$entry" "$compat"
57	    echo "#endif"
58	elif [ "$abi" == "I386" ]; then
59	    emit "$abi" "$nr" "$entry" "$compat"
60	else
61	    echo "Unknown abi $abi" >&2
62	    exit 1
63	fi
64    done
65) > "$out"