v4.19.13 snapshot.
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh
new file mode 100644
index 0000000..94fcd19
--- /dev/null
+++ b/arch/x86/entry/syscalls/syscalltbl.sh
@@ -0,0 +1,81 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+
+syscall_macro() {
+ abi="$1"
+ nr="$2"
+ entry="$3"
+
+ # Entry can be either just a function name or "function/qualifier"
+ real_entry="${entry%%/*}"
+ if [ "$entry" = "$real_entry" ]; then
+ qualifier=
+ else
+ qualifier=${entry#*/}
+ fi
+
+ echo "__SYSCALL_${abi}($nr, $real_entry, $qualifier)"
+}
+
+emit() {
+ abi="$1"
+ nr="$2"
+ entry="$3"
+ compat="$4"
+ umlentry=""
+
+ if [ "$abi" = "64" -a -n "$compat" ]; then
+ echo "a compat entry for a 64-bit syscall makes no sense" >&2
+ exit 1
+ fi
+
+ # For CONFIG_UML, we need to strip the __x64_sys prefix
+ if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
+ umlentry="sys${entry#__x64_sys}"
+ fi
+
+ if [ -z "$compat" ]; then
+ if [ -n "$entry" -a -z "$umlentry" ]; then
+ syscall_macro "$abi" "$nr" "$entry"
+ elif [ -n "$umlentry" ]; then # implies -n "$entry"
+ echo "#ifdef CONFIG_X86"
+ syscall_macro "$abi" "$nr" "$entry"
+ echo "#else /* CONFIG_UML */"
+ syscall_macro "$abi" "$nr" "$umlentry"
+ echo "#endif"
+ fi
+ else
+ echo "#ifdef CONFIG_X86_32"
+ if [ -n "$entry" ]; then
+ syscall_macro "$abi" "$nr" "$entry"
+ fi
+ echo "#else"
+ syscall_macro "$abi" "$nr" "$compat"
+ echo "#endif"
+ fi
+}
+
+grep '^[0-9]' "$in" | sort -n | (
+ while read nr abi name entry compat; do
+ abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
+ if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
+ # COMMON is the same as 64, except that we don't expect X32
+ # programs to use it. Our expectation has nothing to do with
+ # any generated code, so treat them the same.
+ emit 64 "$nr" "$entry" "$compat"
+ elif [ "$abi" = "X32" ]; then
+ # X32 is equivalent to 64 on an X32-compatible kernel.
+ echo "#ifdef CONFIG_X86_X32_ABI"
+ emit 64 "$nr" "$entry" "$compat"
+ echo "#endif"
+ elif [ "$abi" = "I386" ]; then
+ emit "$abi" "$nr" "$entry" "$compat"
+ else
+ echo "Unknown abi $abi" >&2
+ exit 1
+ fi
+ done
+) > "$out"