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="$4"
  28     umlentry=""
  29
  30     if [ "$abi" = "64" -a -n "$compat" ]; then
  31         echo "a compat entry for a 64-bit syscall makes no sense" >&2
  32         exit 1
  33     fi
  34
  35     # For CONFIG_UML, we need to strip the __x64_sys prefix
  36     if [ "$abi" = "64" -a "${entry}" != "${entry#__x64_sys}" ]; then
  37             umlentry="sys${entry#__x64_sys}"
  38     fi
  39
  40     if [ -z "$compat" ]; then
  41         if [ -n "$entry" -a -z "$umlentry" ]; then
  42             syscall_macro "$abi" "$nr" "$entry"
  43         elif [ -n "$umlentry" ]; then # implies -n "$entry"
  44             echo "#ifdef CONFIG_X86"
  45             syscall_macro "$abi" "$nr" "$entry"
  46             echo "#else /* CONFIG_UML */"
  47             syscall_macro "$abi" "$nr" "$umlentry"
  48             echo "#endif"
  49         fi
  50     else
  51         echo "#ifdef CONFIG_X86_32"
  52         if [ -n "$entry" ]; then
  53             syscall_macro "$abi" "$nr" "$entry"
  54         fi
  55         echo "#else"
  56         syscall_macro "$abi" "$nr" "$compat"
  57         echo "#endif"
  58     fi
  59 }
  60
  61 grep '^[0-9]' "$in" | sort -n | (
  62     while read nr abi name entry compat; do
  63         abi=`echo "$abi" | tr '[a-z]' '[A-Z]'`
  64         if [ "$abi" = "COMMON" -o "$abi" = "64" ]; then
  65             # COMMON is the same as 64, except that we don't expect X32
  66             # programs to use it.  Our expectation has nothing to do with
  67             # any generated code, so treat them the same.
  68             emit 64 "$nr" "$entry" "$compat"
  69         elif [ "$abi" = "X32" ]; then
  70             # X32 is equivalent to 64 on an X32-compatible kernel.
  71             echo "#ifdef CONFIG_X86_X32_ABI"
  72             emit 64 "$nr" "$entry" "$compat"
  73             echo "#endif"
  74         elif [ "$abi" = "I386" ]; then
  75             emit "$abi" "$nr" "$entry" "$compat"
  76         else
  77             echo "Unknown abi $abi" >&2
  78             exit 1
  79         fi
  80     done
  81 ) > "$out"