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