gdb/merge-syscalls.sh

   1 #!/bin/sh
   2
   3 # Copyright 1998 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GDB.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20
  21 ################
  22 # Usage: merge-syscalls syscall.tab [HEADER-FILE ...]
  23 #
  24 # This will scan every HEADER-FILE
  25 # (default is /usr/include/sys/syscall.h)
  26 # for #define SYS_xxx directives,
  27 # recursively scanning #included files.
  28 #
  29 # Then it updates "syscall.tab", which is a file that has a
  30 # C fragment to initialize a table of known syscall names.
  31 # Any syscalls already in "syscall.tab" will be kept.
  32 #
  33 # In principle, you don't need to run this unless you're
  34 # porting gdb to a new host that uses procfs.c.
  35 #
  36 # FIXME: perhaps use gcc -E -dM instead.
  37 # FIXME: perhaps track which hosts have which syscalls.
  38
  39 DEST=$1; shift
  40
  41 WS=`printf "[\t ]*" 2>/dev/null || echo '[       ]*'`
  42
  43
  44 scan_all () {
  45     for file
  46     do
  47         scan_one $file
  48     done
  49 }
  50
  51 scan_one () {
  52     echo >&2 "scanning $1..."
  53     <$1 sed -n -e "
  54         /^#${WS}define${WS}SYS_[_a-zA-Z0-9]${WS}/ {
  55             s/^${WS}#${WS}define${WS}\(SYS_[_a-zA-Z0-9]*\)${WS}.*/\1/
  56             p
  57         }
  58         /${WS}syscall_table${WS}\[SYS_[_a-zA-Z0-9]*\]/ {
  59             s/^.*${WS}syscall_table${WS}\[\(SYS_[_a-zA-Z0-9]*\)\].*/\1/
  60             p
  61         }
  62     " $1 &&
  63
  64     includes=`
  65         <$1 sed -n -e "
  66             /^${WS}#${WS}include${WS}</{
  67                 s/^${WS}#${WS}include${WS}<\([^>]*\)>.*/\1/
  68                 p
  69             }
  70         " |
  71         while read inc; do
  72             for dir in /usr/include; do
  73                 if [ -f "$dir/$inc" ]; then
  74                     echo $dir/$inc
  75                 fi
  76             done
  77         done
  78     ` &&
  79
  80     scan_all $includes
  81 }
  82
  83 case $# in
  84 0)
  85     set -- /usr/include/sys/syscall.h
  86     ;;
  87 esac
  88
  89 scan_all $DEST "$@" |
  90 sort -u |
  91 (
  92     echo "/* This file is semi-automatically updated by `basename $0` */"
  93     while read sys; do
  94         tail=`echo "$sys" | sed 's/^SYS_//'`
  95         echo "#if defined ($sys)"
  96         echo "  syscall_table[$sys] = "\""$tail"\"";"
  97         echo "#endif"
  98     done
  99 ) > tmp$$ || exit 1
 100
 101 if cmp -s $DEST tmp$$; then
 102    echo "$DEST unchanged"
 103    rm -f tmp$$
 104
 105 else
 106     echo "creating new $DEST..."
 107     if [ -f $DEST ]; then
 108        mv $DEST $DEST.orig || exit 1
 109        echo " (original moved to $DEST.orig)"
 110     fi
 111     mv tmp$$ $DEST
 112 fi
 113
 114