granicus.if.org Git - strace/blob - maint/ioctls_sym.sh

   1 #!/bin/sh
   2 # Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
   3 # All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions
   7 # are met:
   8 # 1. Redistributions of source code must retain the above copyright
   9 #    notice, this list of conditions and the following disclaimer.
  10 # 2. Redistributions in binary form must reproduce the above copyright
  11 #    notice, this list of conditions and the following disclaimer in the
  12 #    documentation and/or other materials provided with the distribution.
  13 # 3. The name of the author may not be used to endorse or promote products
  14 #    derived from this software without specific prior written permission.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 set -efu
  28
  29 # This script processes header files containing ioctl command definitions in
  30 # symbolic form, assuming that these definitions match the following regular
  31 # expressions:
  32
  33 r_define='^[[:space:]]*#[[:space:]]*define[[:space:]]\+'
  34 r_cmd_name='[A-Z][A-Z0-9_]*'
  35 r_io='\([A-Z]\+\)\?_S\?\(IO\|IOW\|IOR\|IOWR\|IOC\)'
  36 r_value='[[:space:]]\+'"$r_io"'[[:space:]]*([^)]'
  37 regexp="${r_define}${r_cmd_name}${r_value}"
  38
  39 me="${0##*/}"
  40 msg()
  41 {
  42         printf >&2 '%s\n' "$me: $*"
  43 }
  44
  45 prefix=
  46 case $# in
  47         1)      inc_dir="$1"; shift
  48                 ;;
  49         2)      inc_dir="$1"; shift
  50                 prefix="$1"; shift
  51                 ;;
  52         *)      echo >&2 "usage: $me include-directory [prefix]"
  53                 exit 1
  54                 ;;
  55 esac
  56
  57 [ -z "$prefix" ] ||
  58         prefix="${prefix%%/}/"
  59
  60 tmpdir=
  61 cleanup()
  62 {
  63         trap - EXIT
  64         [ -z "$tmpdir" ] ||
  65                 rm -rf -- "$tmpdir"
  66         exit "$@"
  67 }
  68
  69 trap 'cleanup $?' EXIT
  70 trap 'cleanup 1' HUP PIPE INT QUIT TERM
  71 tmpdir="$(mktemp -dt "$me.XXXXXX")"
  72
  73 # list interesting files in $inc_dir.
  74 cd "$inc_dir"
  75 inc_dir="$(pwd -P)"
  76 find . -type f -name '*.h' -print0 |
  77         xargs -r0 grep -l "$r_value" -- > "$tmpdir"/headers1.list ||
  78                 exit 0
  79 cd - > /dev/null
  80 sed 's|^\./\(uapi/\)\?||' < "$tmpdir"/headers1.list > "$tmpdir"/headers.list
  81 sort -u -o "$tmpdir"/headers.list "$tmpdir"/headers.list
  82
  83 msg "processing $(wc -l < "$tmpdir"/headers.list) header files from $inc_dir"
  84 failed=0
  85
  86 CC="${CC:-gcc}"
  87 CPP="${CPP:-cpp}"
  88 CPPFLAGS="${CPPFLAGS-} -D__EXPORTED_HEADERS__"
  89 CFLAGS="${CFLAGS:--Wall -O2} -D__EXPORTED_HEADERS__"
  90 LDFLAGS="${LDFLAGS-}"
  91 INCLUDES="-I$inc_dir/uapi -I$inc_dir ${INCLUDES-}"
  92
  93 $CC $INCLUDES $CFLAGS -c -o "$tmpdir"/print_ioctlent.o "${0%/*}"/print_ioctlent.c
  94
  95 # Hook onto <asm-generic/ioctl.h> and <asm/ioctl.h>
  96 for d in asm-generic asm; do
  97         mkdir "$tmpdir/$d"
  98         cat > "$tmpdir/$d"/ioctl.h <<__EOF__
  99 #include_next <$d/ioctl.h>
 100 #undef _IOC
 101 #define _IOC(dir,type,nr,size) dir, type, nr, size
 102 __EOF__
 103 done
 104
 105 INCLUDES="-I$tmpdir $INCLUDES"
 106
 107 process_file()
 108 {
 109         local f="$1"; shift
 110
 111         # Common code for every processed file.
 112         cat > "$tmpdir"/printents.c <<__EOF__
 113 #include <asm/termbits.h>
 114 #include <asm/ioctl.h>
 115 #include <linux/types.h>
 116 #include <linux/limits.h>
 117 #include <linux/major.h>
 118
 119 #include <sys/types.h>
 120 #include <sys/socket.h>
 121 #include <stdint.h>
 122 #include <stdbool.h>
 123
 124 #ifndef NULL
 125 # define NULL ((void*)0)
 126 #endif
 127 #ifndef __user
 128 # define __user
 129 #endif
 130 #ifndef __iomem
 131 # define __iomem
 132 #endif
 133 #ifndef __noreturn
 134 # define __noreturn __attribute__((noreturn))
 135 #endif
 136 #ifndef __packed
 137 # define __packed __attribute__((packed))
 138 #endif
 139
 140 typedef signed char s8;
 141 typedef unsigned char u8;
 142 typedef signed short s16;
 143 typedef unsigned short u16;
 144 typedef signed int s32;
 145 typedef unsigned int u32;
 146 typedef signed long long s64;
 147 typedef unsigned long long u64;
 148
 149 #include "fixes.h"
 150
 151 #include <asm/bitsperlong.h>
 152 #ifndef BITS_PER_LONG
 153 # define BITS_PER_LONG __BITS_PER_LONG
 154 #endif
 155
 156 #include "$f"
 157
 158 void print_ioctlent(const char *, const char *, unsigned short, unsigned short, unsigned short, unsigned short);
 159
 160 int main(void)
 161 {
 162
 163 #include "defs.h"
 164
 165 return 0;
 166 }
 167 __EOF__
 168
 169         # Soft workarounds for some processed files.  Fragile.
 170         case "$f" in
 171                 *asm/cmb.h)
 172                         echo '#include <asm/dasd.h>'
 173                         ;;
 174                 *asm/ioctls.h)
 175                         cat <<'__EOF__'
 176 #include <asm/termios.h>
 177 #include <linux/serial.h>
 178 __EOF__
 179                         ;;
 180                 *drm/*_drm.h)
 181                         echo '#include <drm/drm.h>'
 182                         ;;
 183                 fbio.h|*/fbio.h)
 184                         cat <<'__EOF__'
 185 #include <linux/fb.h>
 186 #undef FBIOGETCMAP
 187 #undef FBIOPUTCMAP
 188 __EOF__
 189                         ;;
 190                 *linux/atm?*.h)
 191                         echo '#include <linux/atm.h>'
 192                         ;;
 193                 *linux/auto_fs*.h)
 194                         echo 'typedef u32 compat_ulong_t;'
 195                         ;;
 196                 *linux/btrfs.h)
 197                         cat <<'__EOF__'
 198 struct btrfs_ioctl_defrag_range_args { __u32 unused[12]; };
 199 #define BTRFS_LABEL_SIZE 256
 200 __EOF__
 201                         ;;
 202                 *linux/coda.h|*android_alarm.h)
 203                         cat <<'__EOF__'
 204 #ifndef _LINUX_TIME_H
 205 # define _LINUX_TIME_H
 206 #endif
 207 #ifndef _UAPI_LINUX_TIME_H
 208 # define _UAPI_LINUX_TIME_H
 209 #endif
 210 __EOF__
 211                         ;;
 212                 *linux/fs.h|*linux/ncp_fs.h)
 213                         cat <<'__EOF__'
 214 #include <linux/blktrace_api.h>
 215 #include <linux/fiemap.h>
 216 __EOF__
 217                         ;;
 218                 *linux/if_pppox.h)
 219                         cat <<'__EOF__'
 220 #include <linux/if.h>
 221 #include <linux/in.h>
 222 #include <linux/in6.h>
 223 __EOF__
 224                         ;;
 225                 *linux/if_tun.h|*linux/ppp-ioctl.h)
 226                         echo '#include <linux/filter.h>'
 227                         ;;
 228                 *linux/isdn_ppp.h|*linux/gsmmux.h)
 229                         echo '#include <linux/if.h>'
 230                         ;;
 231                 *media/saa6588.h)
 232                         echo 'typedef struct poll_table_struct poll_table;'
 233                         ;;
 234                 *linux/ivtvfb.h|*linux/meye.h|*media/*.h)
 235                         echo '#include <linux/videodev2.h>'
 236                         ;;
 237                 *linux/kvm.h)
 238                         cat <<'__EOF__'
 239 #if defined __x86_64__ || defined __i386__
 240 struct kvm_create_spapr_tce { __u32 unused[3]; };
 241 struct kvm_allocate_rma { __u32 unused[2]; };
 242 struct kvm_get_htab_fd { __u32 unused[8]; };
 243 struct kvm_rtas_token_args { __u8 unused[128]; };
 244 struct kvm_vcpu_init { __u32 unused[8]; };
 245 #endif
 246 __EOF__
 247                         ;;
 248                 *linux/sonet.h)
 249                         echo '#include <linux/atmioc.h>'
 250                         ;;
 251                 *linux/usbdevice_fs.h)
 252                         cat <<'__EOF__'
 253 struct usbdevfs_ctrltransfer32 { __u32 unused[4]; };
 254 struct usbdevfs_bulktransfer32 { __u32 unused[4]; };
 255 struct usbdevfs_disconnectsignal32 { __u32 unused[2]; };
 256 struct usbdevfs_urb32 { __u8 unused[42]; };
 257 struct usbdevfs_ioctl32 { __u32 unused[3]; };
 258 __EOF__
 259                         ;;
 260                 logger.h|*/logger.h)
 261                         echo 'typedef __u32 kuid_t;'
 262                         ;;
 263                 *sound/asequencer.h)
 264                         cat <<'__EOF__'
 265 #include <sound/asound.h>
 266 struct snd_seq_queue_owner { __u32 unused[0]; };
 267 __EOF__
 268                         ;;
 269                 *sound/emu10k1.h)
 270                         cat <<'__EOF__'
 271 #include <sound/asound.h>
 272 #ifndef DECLARE_BITMAP
 273 # define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
 274 # define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, 8 * sizeof(long))
 275 # define DECLARE_BITMAP(name,bits) unsigned long name[BITS_TO_LONGS(bits)]
 276 #endif
 277 __EOF__
 278                         ;;
 279                 *video/sstfb.h)
 280                         echo 'struct fb_info;'
 281                         ;;
 282                 *xen/interface/*.h)
 283                         return 0 # false positives
 284                         ;;
 285                 *xen/privcmd.h)
 286                         return 0 # too much work to make it compileable
 287                         ;;
 288         esac > "$tmpdir"/fixes.h
 289
 290         cat > "$tmpdir"/header.in <<__EOF__
 291 #include <asm/bitsperlong.h>
 292 #ifndef BITS_PER_LONG
 293 # define BITS_PER_LONG __BITS_PER_LONG
 294 #endif
 295 #include "$f"
 296 __EOF__
 297
 298         if [ -f "$inc_dir/uapi/$f" ]; then
 299                 s="$inc_dir/uapi/$f"
 300         elif [ -f "$inc_dir/$f" ]; then
 301                 s="$inc_dir/$f"
 302         else
 303                 msg "$f: file not found"
 304                 return 1
 305         fi
 306
 307         [ -n "${f##*/*}" ] ||
 308                 mkdir -p "$tmpdir/${f%/*}"
 309         # Hard workarounds for some processed files.  Very fragile.
 310         case "$f" in
 311                 *acpi/*|*linux/i2o.h|*media/exynos-fimc.h|*media/v4l2-subdev.h|*net/bluetooth/*)
 312                         # Fetch macros only.
 313                         grep "${r_define}${r_cmd_name}" < "$s" > "$tmpdir/$f"
 314                         ;;
 315                 binder.h|*/binder.h)
 316                         # Convert enums to macros.
 317                         sed '/^enum binder/,/^};/d' < "$s" > "$tmpdir/$f"
 318                         sed -n '/^enum binder/,/^};/ s/^[[:space:]].*/&/p' < "$s" |
 319                         sed -e '
 320 s/^[[:space:]]*\([A-Z][A-Z_0-9]*\)[[:space:]]*=[[:space:]]*_\(IO\|IOW\|IOR\|IOWR\|IOC\)[[:space:]]*(/#define \1 _\2(/
 321 s/^\(#define .*)\),$/\1/
 322 s/^\(#define .*,\)$/\1 \\/
 323 s/^\([[:space:]]\+[^),]\+)\),$/\1/' >> "$tmpdir/$f"
 324                         ;;
 325                 *drm/r128_drm.h)
 326                         # Filter out the code that references unknown types.
 327                         sed '/drm_r128_clear2_t/d' < "$s" > "$tmpdir/$f"
 328                         ;;
 329                 *drm/sis_drm.h)
 330                         # Filter out the code that references unknown types.
 331                         sed '/^struct sis_file_private/,/^}/d' < "$s" > "$tmpdir/$f"
 332                         ;;
 333                 *drm/via_drm.h)
 334                         # Create the file it attempts to include.
 335                         touch "$tmpdir/via_drmclient.h"
 336                         # Filter out the code that references unknown types.
 337                         sed '/^struct via_file_private/,/^}/d' < "$s" > "$tmpdir/$f"
 338                         ;;
 339                 *linux/vmw_vmci_defs.h)
 340                         # Fetch ioctl macros only.
 341                         grep "${r_define}I" < "$s" > "$tmpdir/$f"
 342                         ;;
 343                 *media/v4l2-common.h)
 344                         # Fetch one piece of code containing ioctls definitions.
 345                         sed -n '/ remaining ioctls/,/ ---/p' < "$s" > "$tmpdir/$f"
 346                         ;;
 347                 *linux/nilfs2_fs.h)
 348                         # Create the file it attempts to include.
 349                         touch "$tmpdir/asm/bug.h"
 350                         ;;
 351                 openpromio.h|*/openpromio.h|fbio.h|*/fbio.h)
 352                         # Create the file it attempts to include.
 353                         mkdir -p "$tmpdir/linux"
 354                         touch "$tmpdir/linux/compiler.h"
 355         esac
 356         if [ -f "$tmpdir/$f" ]; then
 357                 s="$tmpdir/$f"
 358         fi
 359
 360         # This may fail if the file includes unavailable headers.
 361         # In case of success it outputs both the #define directives
 362         # and the result of preprocessing.
 363         $CPP $CPPFLAGS -dD $INCLUDES < "$tmpdir"/header.in > "$tmpdir"/header.out
 364
 365         # Need to exclude ioctl commands defined elsewhere.
 366         local_defines='^[[:space:]]*#[[:space:]]*define[[:space:]]\+\('"$r_cmd_name"'\)[[:space:]]'
 367         sed -n 's/'"$local_defines"'.*/\1\\/p' "$s" > "$tmpdir"/local_names
 368         r_local_names="$(tr '\n' '|' < "$tmpdir"/local_names)"
 369         r_local_names="${r_local_names%%|}"
 370         r_local_names="${r_local_names%%\\}"
 371
 372         # Keep this in sync with $regexp by replacing $r_cmd_name with $r_local_names.
 373         defs_regexp="${r_define}\($r_local_names\)${r_value}"
 374
 375         qf="$(echo "$prefix$f" | sed 's/[&\/]/\\&/g')"
 376         # This outputs lines in the following format:
 377         # print_ioctlent("filename.h", "IOCTL_CMD_NAME", IOCTL_CMD_NAME);
 378         sed -n 's/'"$defs_regexp"'.*/print_ioctlent("'"$qf"'", "\1", \1);/p' \
 379                 < "$tmpdir"/header.out > "$tmpdir"/defs.h
 380
 381         # If something is wrong with the file, this will fail.
 382         $CC $INCLUDES $CFLAGS -c -o "$tmpdir"/printents.o "$tmpdir"/printents.c
 383         $CC $LDFLAGS -o "$tmpdir"/print_ioctlents \
 384                 "$tmpdir"/printents.o "$tmpdir"/print_ioctlent.o
 385         "$tmpdir"/print_ioctlents > "$tmpdir"/ioctlents
 386         cat "$tmpdir"/ioctlents
 387         msg "$f: fetched $(grep -c '^{' "$tmpdir"/ioctlents) ioctl entries"
 388 }
 389
 390 while read f; do
 391         (process_file "$f" < /dev/null)
 392         [ $? -eq 0 ] || {
 393                 msg "$f: failed to process"
 394                 failed=$((1 + $failed))
 395         }
 396 done < "$tmpdir"/headers.list
 397
 398 [ $failed -eq 0 ] ||
 399         msg "failed to process $failed file(s)"