arch/x86/entry/syscalls/syscalltbl.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 in="$1"
   5 out="$2"
   6
   7 syscall_macro() {
   8     local abi="$1"
   9     local nr="$2"
  10     local 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     local abi="$1"
  25     local nr="$2"
  26     local entry="$3"
  27     local compat="$4"
  28     local umlentry=""
  29
  30     if [ "$abi" != "I386" -a -n "$compat" ]; then
  31         echo "a compat entry ($abi: $compat) for a 64-bit syscall makes no sense" >&2
  32         exit 1
  33     fi
  34
  35     # For CONFIG_UML, we need to strip the __x64_sys prefix
  36     if [ "$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             emit 64 "$nr" "$entry" "$compat"
  66             if [ "$abi" = "COMMON" ]; then
  67                 # COMMON means that this syscall exists in the same form for
  68                 # 64-bit and X32.
  69                 echo "#ifdef CONFIG_X86_X32_ABI"
  70                 emit X32 "$nr" "$entry" "$compat"
  71                 echo "#endif"
  72             fi
  73         elif [ "$abi" = "X32" ]; then
  74             echo "#ifdef CONFIG_X86_X32_ABI"
  75             emit X32 "$nr" "$entry" "$compat"
  76             echo "#endif"
  77         elif [ "$abi" = "I386" ]; then
  78             emit "$abi" "$nr" "$entry" "$compat"
  79         else
  80             echo "Unknown abi $abi" >&2
  81             exit 1
  82         fi
  83     done
  84 ) > "$out"