arch/x86/entry/syscalls/syscalltbl.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 in="$1"
   5 out="$2"
   6
   7 syscall_macro() {
   8     abi="$1"
   9     nr="$2"
  10     entry="$3"
  11
  12     # Entry can be either just a function name or "function/qualifier"
  13     real_entry="${entry%%/*}"
  14     if [ "$entry" = "$real_entry" ]; then
  15         qualifier=
  16     else
  17         qualifier=${entry#*/}
  18     fi
  19
  20     echo "__SYSCALL_${abi}($nr, $real_entry, $qualifier)"
  21 }
  22
  23 emit() {
  24     abi="$1"
  25     nr="$2"
  26     entry="$3"
  27     compat="$4"
  28
  29     if [ "$abi" = "64" -a -n "$compat" ]; then
  30         echo "a compat entry for a 64-bit syscall makes no sense" >&2
  31         exit 1
  32     fi
  33
  34     if [ -z "$compat" ]; then
  35         if [ -n "$entry" ]; then
  36             syscall_macro "$abi" "$nr" "$entry"
  37         fi
  38     else
  39         echo "#ifdef CONFIG_X86_32"
  40         if [ -n "$entry" ]; then
  41             syscall_macro "$abi" "$nr" "$entry"
  42         fi
  43         echo "#else"
  44         syscall_macro "$abi" "$nr" "$compat"
  45         echo "#endif"
  46     fi
  47 }
  48
  49 grep '^[0-9]' "$in" | sort -n | (
  50     while read nr abi name entry compat; do
  51         abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
  52         if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
  53             # COMMON is the same as 64, except that we don't expect X32
  54             # programs to use it.  Our expectation has nothing to do with
  55             # any generated code, so treat them the same.
  56             emit 64 "$nr" "$entry" "$compat"
  57         elif [ "$abi" = "X32" ]; then
  58             # X32 is equivalent to 64 on an X32-compatible kernel.
  59             echo "#ifdef CONFIG_X86_X32_ABI"
  60             emit 64 "$nr" "$entry" "$compat"
  61             echo "#endif"
  62         elif [ "$abi" = "I386" ]; then
  63             emit "$abi" "$nr" "$entry" "$compat"
  64         else
  65             echo "Unknown abi $abi" >&2
  66             exit 1
  67         fi
  68     done
  69 ) > "$out"