arch/x86/entry/syscalls/syscalltbl.sh

   1 #!/bin/sh
   2
   3 in="$1"
   4 out="$2"
   5
   6 syscall_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
  19 emit() {
  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" "$compat"
  41         echo "#endif"
  42     fi
  43 }
  44
  45 grep '^[0-9]' "$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"