generate_netbsd_ioctls.awk

#!/usr/bin/awk -f

#===-- generate_netbsd_ioctls.awk ------------------------------------------===#
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===------------------------------------------------------------------------===#
#
# This file is a generator of:
#  - include/sanitizer/sanitizer_interceptors_ioctl_netbsd.inc
#
# This script reads public headers from a NetBSD host.
#
# This script shall be executed only on the newest NetBSD version.
# This script will emit compat code for the older releases.
#
# NetBSD minimal version supported 9.0.
# NetBSD current version supported 9.99.26.
#
#===------------------------------------------------------------------------===#

BEGIN {
  # hardcode the script name
  script_name = "generate_netbsd_ioctls.awk"
  outputinc = "../lib/sanitizer_common/sanitizer_interceptors_ioctl_netbsd.inc"

  # assert that we are in the directory with scripts
  in_utils = system("test -f " script_name " && exit 1 || exit 0")
  if (in_utils == 0) {
    usage()
  }

  # assert 0 argument passed
  if (ARGC != 1) {
    usage()
  }

  # accept overloading CLANGFORMAT from environment
  clangformat = "clang-format"
  if ("CLANGFORMAT" in ENVIRON) {
    clangformat = ENVIRON["CLANGFORMAT"]
  }

  # accept overloading ROOTDIR from environment
  rootdir = "/usr/include/"
  if ("ROOTDIR" in ENVIRON) {
    rootdir = ENVIRON["ROOTDIR"]
  }

  # detect and register files to detect ioctl() definitions
  ARGC = 1
  cmd = "find " rootdir " -type f -name '*.h'"
  while (cmd | getline) {
    ARGV[ARGC++] = $0
  }
  close(cmd)

  ioctl_table_max = 0
}

# Scan RCS ID
FNR == 1 {
  fname[ioctl_table_max] = substr(FILENAME, length(rootdir) + 1)
}

# _IO
/[^a-zA-Z0-9_]_IO[W]*[R]*[ ]*\(/ && $2 ~ /^[A-Z_]+$/ {
  if ($0 ~ /RAIDFRAME_GET_ACCTOTALS/ ||
      $0 ~ /ALTQATTACH/ ||
      $0 ~ /ALTQDETACH/ ||
      $0 ~ /ALTQENABLE/ ||
      $0 ~ /ALTQDISABLE/ ||
      $0 ~ /ALTQCLEAR/ ||
      $0 ~ /ALTQCONFIG/ ||
      $0 ~ /ALTQADDCLASS/ ||
      $0 ~ /ALTQMODCLASS/ ||
      $0 ~ /ALTQDELCLASS/ ||
      $0 ~ /ALTQADDFILTER/ ||
      $0 ~ /ALTQDELFILTER/ ||
      $0 ~ /ALTQGETSTATS/ ||
      $0 ~ /ALTQGETCNTR/ ||
      $0 ~ /HFSC_IF_ATTACH/ ||
      $0 ~ /HFSC_MOD_CLASS/ ||
      $0 ~ /HLCD_DISPCTL/ ||
      $0 ~ /HLCD_RESET/ ||
      $0 ~ /HLCD_CLEAR/ ||
      $0 ~ /HLCD_CURSOR_LEFT/ ||
      $0 ~ /HLCD_CURSOR_RIGHT/ ||
      $0 ~ /HLCD_GET_CURSOR_POS/ ||
      $0 ~ /HLCD_SET_CURSOR_POS/ ||
      $0 ~ /HLCD_GETC/ ||
      $0 ~ /HLCD_PUTC/ ||
      $0 ~ /HLCD_SHIFT_LEFT/ ||
      $0 ~ /HLCD_SHIFT_RIGHT/ ||
      $0 ~ /HLCD_HOME/ ||
      $0 ~ /HLCD_WRITE/ ||
      $0 ~ /HLCD_READ/ ||
      $0 ~ /HLCD_REDRAW/ ||
      $0 ~ /HLCD_WRITE_INST/ ||
      $0 ~ /HLCD_WRITE_DATA/ ||
      $0 ~ /HLCD_GET_INFO/ ||
      $0 ~ /HLCD_GET_CHIPNO/ ||
      $0 ~ /HLCD_SET_CHIPNO/ ||
      $0 ~ /RAIDFRAME_TEST_ACC/ ||
      $0 ~ /FBIOGINFO/ ||
      $0 ~ /FBIOSATTR/ ||
      $0 ~ /OBIOCDISK/ ||
      $0 ~ /OBIOCVOL/ ||
      $0 ~ /BIOCSORTIMEOUT/ ||
      $0 ~ /BIOCGORTIMEOUT/ ||
      $0 ~ /PPPIOCSPASS/ ||
      $0 ~ /PPPIOCSACTIVE/ ||
      $0 ~ /PPPIOCSIPASS/ ||
      $0 ~ /PPPIOCSOPASS/ ||
      $0 ~ /PPPIOCSIACTIVE/ ||
      $0 ~ /PPPIOCSOACTIVE/ ||
      $0 ~ /SIOCPROXY/ ||
      $0 ~ /SIOCXRAWATM/ ||
      $0 ~ /AGPIOC_RESERVE/ ||
      $0 ~ /AGPIOC_PROTECT/ ||
      $0 ~ /CDIOCREADSUBCHANNEL_BUF/ ||
      $0 ~ /CDIOREADTOCENTRIES_BUF/ ||
      $0 ~ /MMCGETDISCINFO/ ||
      $0 ~ /MMCGETTRACKINFO/ ||
      $0 ~ /MMCOP/ ||
      $0 ~ /MMCSETUPWRITEPARAMS/ ||
      $0 ~ /DIOCGPARTINFO/ ||
      $0 ~ /ODIOCGDINFO/ ||
      $0 ~ /ODIOCSDINFO/ ||
      $0 ~ /ODIOCWDINFO/ ||
      $0 ~ /ODIOCGDEFLABEL/ ||
      $0 ~ /GPIOPINREAD/ ||
      $0 ~ /GPIOPINWRITE/ ||
      $0 ~ /GPIOPINTOGGLE/ ||
      $0 ~ /GPIOPINCTL/ ||
      $0 ~ /GPIODETACH/ ||
      $0 ~ /SEQUENCER_PERCMODE/ ||
      $0 ~ /SEQUENCER_TESTMIDI/ ||
      $0 ~ /SEQUENCER_MIDI_INFO/ ||
      $0 ~ /SEQUENCER_ID/ ||
      $0 ~ /SEQUENCER_CONTROL/ ||
      $0 ~ /SEQUENCER_REMOVESAMPLE/ ||
      $0 ~ /EVTCHN_RESET/ ||
      $0 ~ /EVTCHN_BIND/ ||
      $0 ~ /EVTCHN_UNBIND/) {
    # broken entry, incomplete definition of the 3rd parameterm etc
    next
  }

  if ($0 ~ /APM_IOC_STANDBY/ ||
      $0 ~ /APM_IOC_SUSPEND/ ||
      $0 ~ /SCIOC_USE_ADF/ ||
      $0 ~ /SCBUSIOLLSCAN/ ||
      $0 ~ /UTOPPYIOCANCEL/ ||
      $0 ~ /JOY_GET_X_OFFSET/ ||
      $0 ~ /CHIOGPICKER/ ||
      $0 ~ /SLIOCGUNIT/ ||
      $0 ~ /TUNSLMODE/ ||
      $0 ~ /CBQ_IF_ATTACH/ ||
      $0 ~ /CDNR_IF_ATTACH/ ||
      $0 ~ /RIO_IF_ATTACH/ ||
      $0 ~ /CBQ_IF_DETACH/ ||
      $0 ~ /HFSC_IF_DETACH/ ||
      $0 ~ /WFQ_IF_DETACH/ ||
      $0 ~ /RIO_IF_DETACH/ ||
      $0 ~ /FIFOQ_IF_DETACH/ ||
      $0 ~ /RED_IF_DETACH/ ||
      $0 ~ /CDNR_ENABLE/ ||
      $0 ~ /HFSC_ENABLE/ ||
      $0 ~ /WFQ_ENABLE/ ||
      $0 ~ /RIO_ENABLE/ ||
      $0 ~ /FIFOQ_ENABLE/ ||
      $0 ~ /RED_ENABLE/ ||
      $0 ~ /BLUE_ENABLE/ ||
      $0 ~ /CDNR_DISABLE/ ||
      $0 ~ /HFSC_DISABLE/ ||
      $0 ~ /WFQ_DISABLE/ ||
      $0 ~ /RIO_DISABLE/ ||
      $0 ~ /FIFOQ_DISABLE/ ||
      $0 ~ /PRIQ_DISABLE/ ||
      $0 ~ /CDNR_DEL_FILTER/ ||
      $0 ~ /JOBS_DEL_CLASS/ ||
      $0 ~ /JOBS_DEL_FILTER/ ||
      $0 ~ /JOBS_GETSTATS/ ||
      $0 ~ /WFQ_GET_STATS/ ||
      $0 ~ /CBQ_ADD_FILTER/ ||
      $0 ~ /HFSC_ADD_FILTER/ ||
      $0 ~ /JOBS_ADD_FILTER/ ||
      $0 ~ /RED_IF_ATTACH/ ||
      $0 ~ /FIFOQ_IF_ATTACH/ ||
      $0 ~ /BLUE_IF_DETACH/ ||
      $0 ~ /CBQ_DISABLE/ ||
      $0 ~ /RED_DISABLE/ ||
      $0 ~ /CBQ_CLEAR_HIERARCHY/ ||
      $0 ~ /HFSC_DEL_CLASS/ ||
      $0 ~ /PRIQ_IF_DETACH/ ||
      $0 ~ /PRIQ_ENABLE/ ||
      $0 ~ /WFQ_IF_ATTACH/ ||
      $0 ~ /POWER_IOC_GET_TYPE_WITH_LOSSAGE/ ||
      $0 ~ /HFSC_DEL_FILTER/) {
    # There are entries with duplicate codes.. disable the less used ones
    next
  }

  if ($2 in known) {
    # Avoid duplicates
    # There are entries compatible with K&R and ANSI preprocessor
    next
  }

  known[$2] = 1

  ioctl_name[ioctl_table_max] = $2

  split($3, a, "(")
  a3 = a[1]
  if (a3 ~ /_IO[ ]*$/) {
    ioctl_mode[ioctl_table_max] = "NONE"
  } else if (a3 ~ /_IOR[ ]*$/) {
    ioctl_mode[ioctl_table_max] = "WRITE"
  } else if (a3 ~ /_IOW[ ]*$/) {
    ioctl_mode[ioctl_table_max] = "READ"
  } else if (a3 ~ /_IOWR[ ]*$/) {
    ioctl_mode[ioctl_table_max] = "READWRITE"
  } else {
    print "Unknown mode, cannot parse: '" $3 "'"
  }

  # This !NONE check allows to skip some unparsable entries
  if (ioctl_mode[ioctl_table_max] != "NONE") {
    n = split($0, a, ",")
    if (n == 3) {
      gsub(/^[ ]+/, "", a[3])
      match(a[3], /[a-zA-Z0-9_* ]+/)
      type = get_type(substr(a[3], 0, RLENGTH))
      ioctl_type[ioctl_table_max] = type
    }
  }

  ioctl_table_max++
}

END {
  # empty files?
  if (NR < 1 && !abnormal_exit) {
    usage()
  }

  # Handle abnormal exit
  if (abnormal_exit) {
    exit(abnormal_exit)
  }

  # Add compat entries
  add_compat("dev/filemon/filemon.h (compat <= 9.99.26)", "FILEMON_SET_FD", "READWRITE", "sizeof(int)")
  add_compat("", "FILEMON_SET_PID", "READWRITE", "sizeof(int)")
  add_compat("dev/usb/urio.h (compat <= 9.99.43)", "URIO_SEND_COMMAND", "READWRITE", "struct_urio_command_sz")
  add_compat("", "URIO_RECV_COMMAND", "READWRITE", "struct_urio_command_sz")

  # Generate sanitizer_interceptors_ioctl_netbsd.inc

  # open pipe
  cmd = clangformat " > " outputinc

  pcmd("//===-- sanitizer_interceptors_ioctl_netbsd.inc -----------------*- C++ -*-===//")
  pcmd("//")
  pcmd("// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.")
  pcmd("// See https://llvm.org/LICENSE.txt for license information.")
  pcmd("// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception")
  pcmd("//")
  pcmd("//===----------------------------------------------------------------------===//")
  pcmd("//")
  pcmd("// Ioctl handling in common sanitizer interceptors.")
  pcmd("//===----------------------------------------------------------------------===//")
  pcmd("")
  pcmd("#if SANITIZER_NETBSD")
  pcmd("")
  pcmd("#include \"sanitizer_flags.h\"")
  pcmd("")
  pcmd("struct ioctl_desc {")
  pcmd("  unsigned req;")
  pcmd("  // FIXME: support read+write arguments. Currently READWRITE and WRITE do the")
  pcmd("  // same thing.")
  pcmd("  // XXX: The declarations below may use WRITE instead of READWRITE, unless")
  pcmd("  // explicitly noted.")
  pcmd("  enum {")
  pcmd("    NONE,")
  pcmd("    READ,")
  pcmd("    WRITE,")
  pcmd("    READWRITE,")
  pcmd("    CUSTOM")
  pcmd("  } type : 3;")
  pcmd("  unsigned size : 29;")
  pcmd("  const char* name;")
  pcmd("};")
  pcmd("")
  pcmd("const unsigned ioctl_table_max = " ioctl_table_max ";")
  pcmd("static ioctl_desc ioctl_table[ioctl_table_max];")
  pcmd("static unsigned ioctl_table_size = 0;")
  pcmd("")
  pcmd("// This can not be declared as a global, because references to struct_*_sz")
  pcmd("// require a global initializer. And this table must be available before global")
  pcmd("// initializers are run.")
  pcmd("static void ioctl_table_fill() {")
  pcmd("#define _(rq, tp, sz)                                    \\")
  pcmd("  if (IOCTL_##rq != IOCTL_NOT_PRESENT) {                 \\")
  pcmd("    CHECK(ioctl_table_size < ioctl_table_max);           \\")
  pcmd("    ioctl_table[ioctl_table_size].req = IOCTL_##rq;      \\")
  pcmd("    ioctl_table[ioctl_table_size].type = ioctl_desc::tp; \\")
  pcmd("    ioctl_table[ioctl_table_size].size = sz;             \\")
  pcmd("    ioctl_table[ioctl_table_size].name = #rq;            \\")
  pcmd("    ++ioctl_table_size;                                  \\")
  pcmd("  }")
  pcmd("")

  for (i = 0; i < ioctl_table_max; i++) {
    if (i in fname && fname[i] == "dev/nvmm/nvmm_ioctl.h") {
      pcmd("#if defined(__x86_64__)")
    }
    if (i in fname) {
      pcmd("  /* Entries from file: " fname[i] " */")
    }

    if (i in ioctl_type) {
      type = ioctl_type[i]
    } else {
      type = "0"
    }

    pcmd("  _(" ioctl_name[i] ", " ioctl_mode[i] "," type ");")

    if (ioctl_name[i] == "NVMM_IOC_CTL") {
      pcmd("#endif")
    }
  }

  pcmd("#undef _")
  pcmd("}")
  pcmd("")
  pcmd("static bool ioctl_initialized = false;")
  pcmd("")
  pcmd("struct ioctl_desc_compare {")
  pcmd("  bool operator()(const ioctl_desc& left, const ioctl_desc& right) const {")
  pcmd("    return left.req < right.req;")
  pcmd("  }")
  pcmd("};")
  pcmd("")
  pcmd("static void ioctl_init() {")
  pcmd("  ioctl_table_fill();")
  pcmd("  Sort(ioctl_table, ioctl_table_size, ioctl_desc_compare());")
  pcmd("")
  pcmd("  bool bad = false;")
  pcmd("  for (unsigned i = 0; i < ioctl_table_size - 1; ++i) {")
  pcmd("    if (ioctl_table[i].req >= ioctl_table[i + 1].req) {")
  pcmd("      Printf(\"Duplicate or unsorted ioctl request id %x >= %x (%s vs %s)\\n\",")
  pcmd("             ioctl_table[i].req, ioctl_table[i + 1].req, ioctl_table[i].name,")
  pcmd("             ioctl_table[i + 1].name);")
  pcmd("      bad = true;")
  pcmd("    }")
  pcmd("  }")
  pcmd("")
  pcmd("  if (bad) Die();")
  pcmd("")
  pcmd("  ioctl_initialized = true;")
  pcmd("}")
  pcmd("")
  pcmd("static const ioctl_desc *ioctl_table_lookup(unsigned req) {")
  pcmd("  int left = 0;")
  pcmd("  int right = ioctl_table_size;")
  pcmd("  while (left < right) {")
  pcmd("    int mid = (left + right) / 2;")
  pcmd("    if (ioctl_table[mid].req < req)")
  pcmd("      left = mid + 1;")
  pcmd("    else")
  pcmd("      right = mid;")
  pcmd("  }")
  pcmd("  if (left == right && ioctl_table[left].req == req)")
  pcmd("    return ioctl_table + left;")
  pcmd("  else")
  pcmd("    return nullptr;")
  pcmd("}")
  pcmd("")
  pcmd("static bool ioctl_decode(unsigned req, ioctl_desc *desc) {")
  pcmd("  CHECK(desc);")
  pcmd("  desc->req = req;")
  pcmd("  desc->name = \"<DECODED_IOCTL>\";")
  pcmd("  desc->size = IOC_SIZE(req);")
  pcmd("  // Sanity check.")
  pcmd("  if (desc->size > 0xFFFF) return false;")
  pcmd("  unsigned dir = IOC_DIR(req);")
  pcmd("  switch (dir) {")
  pcmd("    case IOC_NONE:")
  pcmd("      desc->type = ioctl_desc::NONE;")
  pcmd("      break;")
  pcmd("    case IOC_READ | IOC_WRITE:")
  pcmd("      desc->type = ioctl_desc::READWRITE;")
  pcmd("      break;")
  pcmd("    case IOC_READ:")
  pcmd("      desc->type = ioctl_desc::WRITE;")
  pcmd("      break;")
  pcmd("    case IOC_WRITE:")
  pcmd("      desc->type = ioctl_desc::READ;")
  pcmd("      break;")
  pcmd("    default:")
  pcmd("      return false;")
  pcmd("  }")
  pcmd("  // Size can be 0 iff type is NONE.")
  pcmd("  if ((desc->type == IOC_NONE) != (desc->size == 0)) return false;")
  pcmd("  // Sanity check.")
  pcmd("  if (IOC_TYPE(req) == 0) return false;")
  pcmd("  return true;")
  pcmd("}")
  pcmd("")
  pcmd("static const ioctl_desc *ioctl_lookup(unsigned req) {")
  pcmd("  const ioctl_desc *desc = ioctl_table_lookup(req);")
  pcmd("  if (desc) return desc;")
  pcmd("")
  pcmd("  // Try stripping access size from the request id.")
  pcmd("  desc = ioctl_table_lookup(req & ~(IOC_SIZEMASK << IOC_SIZESHIFT));")
  pcmd("  // Sanity check: requests that encode access size are either read or write and")
  pcmd("  // have size of 0 in the table.")
  pcmd("  if (desc && desc->size == 0 &&")
  pcmd("      (desc->type == ioctl_desc::READWRITE || desc->type == ioctl_desc::WRITE ||")
  pcmd("       desc->type == ioctl_desc::READ))")
  pcmd("    return desc;")
  pcmd("  return nullptr;")
  pcmd("}")
  pcmd("")
  pcmd("static void ioctl_common_pre(void *ctx, const ioctl_desc *desc, int d,")
  pcmd("                             unsigned request, void *arg) {")
  pcmd("  if (desc->type == ioctl_desc::READ || desc->type == ioctl_desc::READWRITE) {")
  pcmd("    unsigned size = desc->size ? desc->size : IOC_SIZE(request);")
  pcmd("    COMMON_INTERCEPTOR_READ_RANGE(ctx, arg, size);")
  pcmd("  }")
  pcmd("  if (desc->type != ioctl_desc::CUSTOM)")
  pcmd("    return;")
  pcmd("  if (request == IOCTL_SIOCGIFCONF) {")
  pcmd("    struct __sanitizer_ifconf *ifc = (__sanitizer_ifconf *)arg;")
  pcmd("    COMMON_INTERCEPTOR_READ_RANGE(ctx, (char*)&ifc->ifc_len,")
  pcmd("                                  sizeof(ifc->ifc_len));")
  pcmd("  }")
  pcmd("}")
  pcmd("")
  pcmd("static void ioctl_common_post(void *ctx, const ioctl_desc *desc, int res, int d,")
  pcmd("                              unsigned request, void *arg) {")
  pcmd("  if (desc->type == ioctl_desc::WRITE || desc->type == ioctl_desc::READWRITE) {")
  pcmd("    // FIXME: add verbose output")
  pcmd("    unsigned size = desc->size ? desc->size : IOC_SIZE(request);")
  pcmd("    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, arg, size);")
  pcmd("  }")
  pcmd("  if (desc->type != ioctl_desc::CUSTOM)")
  pcmd("    return;")
  pcmd("  if (request == IOCTL_SIOCGIFCONF) {")
  pcmd("    struct __sanitizer_ifconf *ifc = (__sanitizer_ifconf *)arg;")
  pcmd("    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifc->ifc_ifcu.ifcu_req, ifc->ifc_len);")
  pcmd("  }")
  pcmd("}")
  pcmd("")
  pcmd("#endif // SANITIZER_NETBSD")

  close(cmd)
}

function usage()
{
  print "Usage: " script_name
  abnormal_exit = 1
  exit 1
}

function pcmd(string)
{
  print string | cmd
}

function get_type(string)
{
  if (string == "int") {
    return "sizeof(int)"
  } else if (string == "unsigned int" || string == "u_int" || string == "uint") {
    return "sizeof(unsigned int)"
  } else if (string == "long") {
    return "sizeof(long)"
  } else if (string == "unsigned long" || string == "u_long") {
    return "sizeof(unsigned long)"
  } else if (string == "short") {
    return "sizeof(short)"
  } else if (string == "unsigned short") {
    return "sizeof(unsigned short)"
  } else if (string == "char") {
    return "sizeof(char)"
  } else if (string == "signed char") {
    return "sizeof(signed char)"
  } else if (string == "unsigned char") {
    return "sizeof(unsigned char)"
  } else if (string == "uint8_t") {
    return "sizeof(u8)"
  } else if (string == "uint16_t") {
    return "sizeof(u16)"
  } else if (string == "u_int32_t" || string == "uint32_t") {
    return "sizeof(u32)"
  } else if (string == "u_int64_t" || string == "uint64_t") {
    return "sizeof(u64)"
  } else if (string ~ /\*$/) {
    return "sizeof(uptr)"
  } else if (string == "off_t") {
    return "sizeof(uptr)"
  } else if (string == "pid_t" || string == "kbd_t") {
    return "sizeof(int)"
  } else if (string == "daddr_t" || string == "dev_t") {
    return "sizeof(u64)"
  } else if (substr(string, 0, 7) == "struct " ) {
    gsub(/ /, "", string)
    return "struct_" substr(string, 7) "_sz"
  } else if (string == "scsireq_t") {
    return "struct_scsireq_sz"
  } else if (string == "tone_t") {
    return "struct_tone_sz"
  } else if (string == "union twe_statrequest") {
    return "union_twe_statrequest_sz"
  } else if (string == "usb_device_descriptor_t") {
    return "struct_usb_device_descriptor_sz"
  } else if (string == "v4l2_std_id") {
    return "sizeof(u64)"
  } else if (string == "vtmode_t") {
    return "struct_vt_mode_sz"
  } else if (string == "_old_mixer_info") {
    return "struct__old_mixer_info_sz"
  } else if (string == "agp_allocate") {
    return "struct__agp_allocate_sz"
  } else if (string == "agp_bind") {
    return "struct__agp_bind_sz"
  } else if (string == "agp_info") {
    return "struct__agp_info_sz"
  } else if (string == "agp_region") {
    return "struct__agp_region_sz"
  } else if (string == "agp_setup") {
    return "struct__agp_setup_sz"
  } else if (string == "agp_unbind") {
    return "struct__agp_unbind_sz"
  } else if (string == "atareq_t") {
    return "struct_atareq_sz"
  } else if (string == "cpustate_t") {
    return "struct_cpustate_sz"
  } else if (string == "dmx_caps_t") {
    return "struct_dmx_caps_sz"
  } else if (string == "dmx_source_t") {
    return "enum_dmx_source_sz"
  } else if (string == "dvd_authinfo") {
    return "union_dvd_authinfo_sz"
  } else if (string == "dvd_struct") {
    return "union_dvd_struct_sz"
  } else if (string == "enum v4l2_priority") {
    return "enum_v4l2_priority_sz"
  } else if (string == "envsys_basic_info_t") {
    return "struct_envsys_basic_info_sz"
  } else if (string == "envsys_tre_data_t") {
    return "struct_envsys_tre_data_sz"
  } else if (string == "ext_accm") {
    return "(8 * sizeof(u32))"
  } else if (string == "fe_sec_mini_cmd_t") {
    return "enum_fe_sec_mini_cmd_sz"
  } else if (string == "fe_sec_tone_mode_t") {
    return "enum_fe_sec_tone_mode_sz"
  } else if (string == "fe_sec_voltage_t") {
    return "enum_fe_sec_voltage_sz"
  } else if (string == "fe_status_t") {
    return "enum_fe_status_sz"
  } else if (string == "gdt_ctrt_t") {
    return "struct_gdt_ctrt_sz"
  } else if (string == "gdt_event_t") {
    return "struct_gdt_event_sz"
  } else if (string == "gdt_osv_t") {
    return "struct_gdt_osv_sz"
  } else if (string == "gdt_rescan_t") {
    return "struct_gdt_rescan_sz"
  } else if (string == "gdt_statist_t") {
    return "struct_gdt_statist_sz"
  } else if (string == "gdt_ucmd_t") {
    return "struct_gdt_ucmd_sz"
  } else if (string == "iscsi_conn_status_parameters_t") {
    return "struct_iscsi_conn_status_parameters_sz"
  } else if (string == "iscsi_get_version_parameters_t") {
    return "struct_iscsi_get_version_parameters_sz"
  } else if (string == "iscsi_iocommand_parameters_t") {
    return "struct_iscsi_iocommand_parameters_sz"
  } else if (string == "iscsi_login_parameters_t") {
    return "struct_iscsi_login_parameters_sz"
  } else if (string == "iscsi_logout_parameters_t") {
    return "struct_iscsi_logout_parameters_sz"
  } else if (string == "iscsi_register_event_parameters_t") {
    return "struct_iscsi_register_event_parameters_sz"
  } else if (string == "iscsi_remove_parameters_t") {
    return "struct_iscsi_remove_parameters_sz"
  } else if (string == "iscsi_send_targets_parameters_t") {
    return "struct_iscsi_send_targets_parameters_sz"
  } else if (string == "iscsi_set_node_name_parameters_t") {
    return "struct_iscsi_set_node_name_parameters_sz"
  } else if (string == "iscsi_wait_event_parameters_t") {
    return "struct_iscsi_wait_event_parameters_sz"
  } else if (string == "isp_stats_t") {
    return "struct_isp_stats_sz"
  } else if (string == "lsenable_t") {
    return "struct_lsenable_sz"
  } else if (string == "lsdisable_t") {
    return "struct_lsdisable_sz"
  } else if (string == "mixer_ctrl_t") {
    return "struct_mixer_ctrl_sz"
  } else if (string == "mixer_devinfo_t") {
    return "struct_mixer_devinfo_sz"
  } else if (string == "mpu_command_rec") {
    return "struct_mpu_command_rec_sz"
  } else if (string == "rndstat_t") {
    return "struct_rndstat_sz"
  } else if (string == "rndstat_name_t") {
    return "struct_rndstat_name_sz"
  } else if (string == "rndctl_t") {
    return "struct_rndctl_sz"
  } else if (string == "rnddata_t") {
    return "struct_rnddata_sz"
  } else if (string == "rndpoolstat_t") {
    return "struct_rndpoolstat_sz"
  } else if (string == "rndstat_est_t") {
    return "struct_rndstat_est_sz"
  } else if (string == "rndstat_est_name_t") {
    return "struct_rndstat_est_name_sz"
  } else if (string == "pps_params_t") {
    return "struct_pps_params_sz"
  } else if (string == "pps_info_t") {
    return "struct_pps_info_sz"
  } else if (string == "linedn_t") {
    return "(32 * sizeof(char))"
  } else if (string == "mixer_info") {
    return "struct_mixer_info_sz"
  } else if (string == "RF_SparetWait_t") {
    return "struct_RF_SparetWait_sz"
  } else if (string == "RF_ComponentLabel_t") {
    return "struct_RF_ComponentLabel_sz"
  } else if (string == "RF_SingleComponent_t") {
    return "struct_RF_SingleComponent_sz"
  } else if (string == "RF_ProgressInfo_t") {
    return "struct_RF_ProgressInfo_sz"
  } else if (string == "nvlist_ref_t") {
    return "struct_nvlist_ref_sz"
  } else if (string == "spi_ioctl_transfer_t") {
    return "struct_spi_ioctl_transfer_sz"
  } else if (string == "spi_ioctl_configure_t") {
    return "struct_spi_ioctl_configure_sz"
  } else {
    print "Unrecognized entry: " string
    print "Aborting"
    abnormal_exit = 1
    exit 1
  }

  return string
}

function add_compat(path, name, mode, type)
{
  if (path != "") {
    fname[ioctl_table_max] = path
  }
  ioctl_name[ioctl_table_max] = name
  ioctl_mode[ioctl_table_max] = mode
  ioctl_type[ioctl_table_max] = type
  ioctl_table_max++
}