gdb/syscalls/update-linux-from-src.sh

   1 #!/bin/bash
   2
   3 # Copyright (C) 2022-2024 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 3 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, see <http://www.gnu.org/licenses/>.
  19
  20 # Used to generate .xml.in files, like so:
  21 # $ ./update-linux-from-src.sh ~/linux-stable.git
  22
  23 pwd=$(pwd -P)
  24
  25 parse_args ()
  26 {
  27     if [ $# -lt 1 ]; then
  28         echo "dir argument needed"
  29         exit 1
  30     fi
  31
  32     d="$1"
  33     shift
  34
  35     if [ ! -d "$d" ]; then
  36         echo "cannot find $d"
  37         exit 1
  38     fi
  39 }
  40
  41 gen_from_kernel_headers ()
  42 {
  43     local f
  44     f="$1"
  45     local arch
  46     arch="$2"
  47
  48     echo "Generating $f"
  49
  50     local tmpdir
  51     tmpdir=$(mktemp -d)
  52     trap 'rm -Rf $tmpdir/*' EXIT
  53
  54     local build
  55     build="$tmpdir"/build
  56     local install
  57     install="$tmpdir"/install
  58     local usr
  59     usr="$install"/usr
  60     local include
  61     include="$usr"/include
  62
  63     mkdir -p "$build" "$usr"
  64
  65     (
  66         cd "$build" || exit 1
  67
  68         make \
  69             -f "$d"/Makefile \
  70             ARCH="$arch" \
  71             INSTALL_HDR_PATH="$usr" \
  72             headers_install \
  73             > "$build"/header_install.log \
  74             2>&1
  75
  76         "$pwd"/update-linux.sh \
  77             "$pwd"/"$f" \
  78             -nostdinc \
  79             -isystem "$include"
  80     )
  81
  82     trap '' EXIT
  83     rm -Rf "$tmpdir"
  84 }
  85
  86 pre ()
  87 {
  88     local f
  89     f="$1"
  90     local start_date
  91     start_date="$2"
  92     local h
  93     h="$3"
  94
  95     local prefix
  96     prefix="     "
  97
  98     if [ "$h" != "" ]; then
  99         file_files="files"
 100         belong_belongs="belong"
 101         files=$(echo -e "$prefix$f\n$prefix$h")
 102     else
 103         file_files="file"
 104         belong_belongs="belongs"
 105         files="$prefix$f"
 106     fi
 107
 108     local year
 109     year=$(date +%Y)
 110
 111     cat <<EOF
 112 <?xml version="1.0"?>
 113 <!-- Copyright (C) $start_date-$year Free Software Foundation, Inc.
 114
 115      Copying and distribution of this file, with or without modification,
 116      are permitted in any medium without royalty provided the copyright
 117      notice and this notice are preserved.  -->
 118
 119 <!DOCTYPE feature SYSTEM "gdb-syscalls.dtd">
 120
 121 <!-- This file was generated using the following $file_files:
 122
 123 $files
 124
 125      The $file_files mentioned above $belong_belongs to the Linux Kernel.  -->
 126
 127
 128 EOF
 129
 130     echo '<syscalls_info>'
 131 }
 132
 133
 134 post ()
 135 {
 136     echo '</syscalls_info>'
 137 }
 138
 139 one ()
 140 {
 141     local f
 142     f="$1"
 143     local select_abis
 144     select_abis="$2"
 145     local start_date
 146     start_date="$3"
 147     local offset
 148     offset="$4"
 149     local h
 150     h="$5"
 151
 152     tmp=$(mktemp)
 153     trap 'rm -f $tmp' EXIT
 154
 155     pre "$f" "$start_date" "$h"
 156
 157     # Print out num, abi, name.
 158     grep -v "^#" "$d/$f" \
 159         | awk '{print $1, $2, $3}' \
 160               > "$tmp"
 161
 162     local decimal
 163     decimal="[0-9][0-9]*"
 164     # Print out num, "removed", name.
 165     grep -E "^# $decimal was sys_*" "$d/$f" \
 166         | awk '{print $2, "removed", gensub("^sys_", "", 1, $4)}' \
 167               >> "$tmp"
 168
 169     case $h in
 170         arch/arm/include/uapi/asm/unistd.h)
 171             grep '#define __ARM_NR_[a-z].*__ARM_NR_BASE\+' "$d/$h" \
 172                 | sed 's/#define //;s/__ARM_NR_BASE+//;s/[()]//g;s/__ARM_NR_/ARM_/' \
 173                 | awk '{print $2 + 0x0f0000, "private", $1}' \
 174                       >> "$tmp"
 175             ;;
 176     esac
 177
 178     local nums
 179     declare -a nums
 180     local abis
 181     declare -a abis
 182     local names
 183     declare -a names
 184     local name_exists
 185     declare -A name_exists
 186
 187     local i
 188     i=0
 189     local _num
 190     local _abi
 191     local _name
 192     while read -r -a line; do
 193         _num="${line[0]}"
 194         _abi="${line[1]}"
 195         _name="${line[2]}"
 196
 197         local found
 198         found=false
 199         for a in $select_abis; do
 200             if [ "$a" = "$_abi" ]; then
 201                 found=true
 202                 break
 203             fi
 204         done
 205         if ! $found; then
 206             continue
 207         fi
 208
 209         if [ "${_name/reserved+([0-9])/}" = "" ]; then
 210             continue
 211         fi
 212
 213         if [ "${_name/unused+([0-9])/}" = "" ]; then
 214             continue
 215         fi
 216
 217         nums[i]="$_num"
 218         abis[i]="$_abi"
 219         names[i]="$_name"
 220
 221         if [ "$_abi" != "removed" ]; then
 222             name_exists[$_name]=1
 223         fi
 224
 225         i=$((i + 1))
 226     done < <(sort -V "$tmp")
 227
 228     local n
 229     n=$i
 230
 231     for ((i = 0 ; i < n ; i++)); do
 232         _name=${names[$i]}
 233         _abi=${abis[$i]}
 234         _num=$((${nums[$i]} + offset))
 235
 236         if [ "$_abi" = "removed" ] && [ "${name_exists[$_name]}" = 1 ]; then
 237             _name=old$_name
 238         fi
 239
 240         echo -n "  <syscall name=\"$_name\" number=\"$_num\"/>"
 241
 242         if [ "$_abi" = "removed" ]; then
 243             echo " <!-- removed -->"
 244         else
 245             echo
 246         fi
 247     done
 248
 249     post
 250 }
 251
 252 regen ()
 253 {
 254     local f
 255     f="$1"
 256
 257     local start_date
 258     start_date=2009
 259     local offset
 260     offset=0
 261     local h
 262     h=
 263
 264     local t
 265     local abi
 266     case $f in
 267         amd64-linux.xml.in)
 268             t="arch/x86/entry/syscalls/syscall_64.tbl"
 269             abi="common 64"
 270             ;;
 271         i386-linux.xml.in)
 272             t="arch/x86/entry/syscalls/syscall_32.tbl"
 273             abi=i386
 274             ;;
 275         ppc64-linux.xml.in)
 276             t="arch/powerpc/kernel/syscalls/syscall.tbl"
 277             abi="common 64 nospu"
 278             ;;
 279         ppc-linux.xml.in)
 280             t="arch/powerpc/kernel/syscalls/syscall.tbl"
 281             abi="common 32 nospu"
 282             ;;
 283         s390-linux.xml.in)
 284             t="arch/s390/kernel/syscalls/syscall.tbl"
 285             abi="common 32"
 286             ;;
 287         s390x-linux.xml.in)
 288             t="arch/s390/kernel/syscalls/syscall.tbl"
 289             abi="common 64"
 290             ;;
 291         sparc64-linux.xml.in)
 292             t="arch/sparc/kernel/syscalls/syscall.tbl"
 293             abi="common 64"
 294             start_date="2010"
 295             ;;
 296         sparc-linux.xml.in)
 297             t="arch/sparc/kernel/syscalls/syscall.tbl"
 298             abi="common 32"
 299             start_date="2010"
 300             ;;
 301         mips-n32-linux.xml.in)
 302             t="arch/mips/kernel/syscalls/syscall_n32.tbl"
 303             abi="n32"
 304             start_date="2011"
 305             offset=6000
 306             ;;
 307         mips-n64-linux.xml.in)
 308             t="arch/mips/kernel/syscalls/syscall_n64.tbl"
 309             abi="n64"
 310             start_date="2011"
 311             offset=5000
 312             ;;
 313         mips-o32-linux.xml.in)
 314             t="arch/mips/kernel/syscalls/syscall_o32.tbl"
 315             abi="o32"
 316             start_date="2011"
 317             offset=4000
 318             ;;
 319         bfin-linux.xml.in)
 320             echo "Skipping $f, no longer supported"
 321             return
 322             ;;
 323         aarch64-linux.xml.in)
 324             # No syscall.tbl.
 325             gen_from_kernel_headers "$f" arm64
 326             return
 327             ;;
 328         arm-linux.xml.in)
 329             t="arch/arm/tools/syscall.tbl"
 330             h="arch/arm/include/uapi/asm/unistd.h"
 331             abi="common eabi oabi removed private"
 332             ;;
 333         loongarch-linux.xml.in)
 334             echo "Skipping $f, no syscall.tbl"
 335             return
 336             ;;
 337         linux-defaults.xml.in)
 338             return
 339             ;;
 340         *)
 341             echo "Don't know how to generate $f"
 342             return
 343             ;;
 344     esac
 345
 346     echo "Generating $f"
 347     one "$t" "$abi" "$start_date" "$offset" "$h" > "$f"
 348 }
 349
 350 main ()
 351 {
 352     shopt -s extglob
 353
 354     # Set global d.
 355     parse_args "$@"
 356
 357     local f
 358     for f in *.xml.in; do
 359         regen "$f"
 360     done
 361 }
 362
 363 main "$@"