arch/arm/tools/syscallnr.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 in="$1"
   4 out="$2"
   5 my_abis=`echo "($3)" | tr ',' '|'`
   6 align=1
   7
   8 fileguard=_ASM_ARM_`basename "$out" | sed \
   9     -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
  10     -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
  11
  12 grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | tail -n1 | (
  13     echo "#ifndef ${fileguard}
  14 #define ${fileguard} 1
  15
  16 /*
  17  * This needs to be greater than __NR_last_syscall+1 in order to account
  18  * for the padding in the syscall table.
  19  */
  20 "
  21
  22     while read nr abi name entry; do
  23         nr=$(($nr + 1))
  24         while [ "$(($nr / (256 * $align) ))" -gt 0 ]; do
  25             align=$(( $align * 4 ))
  26         done
  27         nr=$(( ($nr + $align - 1) & ~($align - 1) ))
  28         echo "/* aligned to $align */"
  29         echo "#define __NR_syscalls $nr"
  30     done
  31
  32     echo ""
  33     echo "#endif /* ${fileguard} */"
  34 ) > "$out"