scripts/kernel-doc

   1 #!/usr/bin/env perl
   2 # SPDX-License-Identifier: GPL-2.0
   3 # vim: softtabstop=4
   4
   5 use warnings;
   6 use strict;
   7
   8 ## Copyright (c) 1998 Michael Zucchi, All Rights Reserved        ##
   9 ## Copyright (C) 2000, 1  Tim Waugh <twaugh@redhat.com>          ##
  10 ## Copyright (C) 2001  Simon Huggins                             ##
  11 ## Copyright (C) 2005-2012  Randy Dunlap                         ##
  12 ## Copyright (C) 2012  Dan Luedtke                               ##
  13 ##                                                               ##
  14 ## #define enhancements by Armin Kuster <akuster@mvista.com>     ##
  15 ## Copyright (c) 2000 MontaVista Software, Inc.                  ##
  16 #
  17 # Copyright (C) 2022 Tomasz Warniełło (POD)
  18
  19 use Pod::Usage qw/pod2usage/;
  20
  21 =head1 NAME
  22
  23 kernel-doc - Print formatted kernel documentation to stdout
  24
  25 =head1 SYNOPSIS
  26
  27  kernel-doc [-h] [-v] [-Werror] [-Wall] [-Wreturn] [-Wshort-desc[ription]] [-Wcontents-before-sections]
  28    [ -man |
  29      -rst [-sphinx-version VERSION] [-enable-lineno] |
  30      -none
  31    ]
  32    [
  33      -export |
  34      -internal |
  35      [-function NAME] ... |
  36      [-nosymbol NAME] ...
  37    ]
  38    [-no-doc-sections]
  39    [-export-file FILE] ...
  40    FILE ...
  41
  42 Run `kernel-doc -h` for details.
  43
  44 =head1 DESCRIPTION
  45
  46 Read C language source or header FILEs, extract embedded documentation comments,
  47 and print formatted documentation to standard output.
  48
  49 The documentation comments are identified by the "/**" opening comment mark.
  50
  51 See Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
  52
  53 =cut
  54
  55 # more perldoc at the end of the file
  56
  57 ## init lots of data
  58
  59 my $errors = 0;
  60 my $warnings = 0;
  61 my $anon_struct_union = 0;
  62
  63 # match expressions used to find embedded type information
  64 my $type_constant = '\b``([^\`]+)``\b';
  65 my $type_constant2 = '\%([-_*\w]+)';
  66 my $type_func = '(\w+)\(\)';
  67 my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
  68 my $type_param_ref = '([\!~\*]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
  69 my $type_fp_param = '\@(\w+)\(\)';  # Special RST handling for func ptr params
  70 my $type_fp_param2 = '\@(\w+->\S+)\(\)';  # Special RST handling for structs with func ptr params
  71 my $type_env = '(\$\w+)';
  72 my $type_enum = '\&(enum\s*([_\w]+))';
  73 my $type_struct = '\&(struct\s*([_\w]+))';
  74 my $type_typedef = '\&(typedef\s*([_\w]+))';
  75 my $type_union = '\&(union\s*([_\w]+))';
  76 my $type_member = '\&([_\w]+)(\.|->)([_\w]+)';
  77 my $type_fallback = '\&([_\w]+)';
  78 my $type_member_func = $type_member . '\(\)';
  79
  80 # Output conversion substitutions.
  81 #  One for each output format
  82
  83 # these are pretty rough
  84 my @highlights_man = (
  85     [$type_constant, "\$1"],
  86     [$type_constant2, "\$1"],
  87     [$type_func, "\\\\fB\$1\\\\fP"],
  88     [$type_enum, "\\\\fI\$1\\\\fP"],
  89     [$type_struct, "\\\\fI\$1\\\\fP"],
  90     [$type_typedef, "\\\\fI\$1\\\\fP"],
  91     [$type_union, "\\\\fI\$1\\\\fP"],
  92     [$type_param, "\\\\fI\$1\\\\fP"],
  93     [$type_param_ref, "\\\\fI\$1\$2\\\\fP"],
  94     [$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
  95     [$type_fallback, "\\\\fI\$1\\\\fP"]
  96   );
  97 my $blankline_man = "";
  98
  99 # rst-mode
 100 my @highlights_rst = (
 101     [$type_constant, "``\$1``"],
 102     [$type_constant2, "``\$1``"],
 103
 104     # Note: need to escape () to avoid func matching later
 105     [$type_member_func, "\\:c\\:type\\:`\$1\$2\$3\\\\(\\\\) <\$1>`"],
 106     [$type_member, "\\:c\\:type\\:`\$1\$2\$3 <\$1>`"],
 107     [$type_fp_param, "**\$1\\\\(\\\\)**"],
 108     [$type_fp_param2, "**\$1\\\\(\\\\)**"],
 109     [$type_func, "\$1()"],
 110     [$type_enum, "\\:c\\:type\\:`\$1 <\$2>`"],
 111     [$type_struct, "\\:c\\:type\\:`\$1 <\$2>`"],
 112     [$type_typedef, "\\:c\\:type\\:`\$1 <\$2>`"],
 113     [$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
 114
 115     # in rst this can refer to any type
 116     [$type_fallback, "\\:c\\:type\\:`\$1`"],
 117     [$type_param_ref, "**\$1\$2**"]
 118   );
 119 my $blankline_rst = "\n";
 120
 121 # read arguments
 122 if ($#ARGV == -1) {
 123     pod2usage(
 124         -message => "No arguments!\n",
 125         -exitval => 1,
 126         -verbose => 99,
 127         -sections => 'SYNOPSIS',
 128         -output => \*STDERR,
 129       );
 130 }
 131
 132 my $kernelversion;
 133 my ($sphinx_major, $sphinx_minor, $sphinx_patch);
 134
 135 my $dohighlight = "";
 136
 137 my $verbose = 0;
 138 my $Werror = 0;
 139 my $Wreturn = 0;
 140 my $Wshort_desc = 0;
 141 my $Wcontents_before_sections = 0;
 142 my $output_mode = "rst";
 143 my $output_preformatted = 0;
 144 my $no_doc_sections = 0;
 145 my $enable_lineno = 0;
 146 my @highlights = @highlights_rst;
 147 my $blankline = $blankline_rst;
 148 my $modulename = "Kernel API";
 149
 150 use constant {
 151     OUTPUT_ALL          => 0, # output all symbols and doc sections
 152     OUTPUT_INCLUDE      => 1, # output only specified symbols
 153     OUTPUT_EXPORTED     => 2, # output exported symbols
 154     OUTPUT_INTERNAL     => 3, # output non-exported symbols
 155 };
 156 my $output_selection = OUTPUT_ALL;
 157 my $show_not_found = 0; # No longer used
 158
 159 my @export_file_list;
 160
 161 my @build_time;
 162 if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
 163     (my $seconds = `date -d "${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
 164     @build_time = gmtime($seconds);
 165 } else {
 166     @build_time = localtime;
 167 }
 168
 169 my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
 170                 'July', 'August', 'September', 'October',
 171                 'November', 'December')[$build_time[4]] .
 172     " " . ($build_time[5]+1900);
 173
 174 # Essentially these are globals.
 175 # They probably want to be tidied up, made more localised or something.
 176 # CAVEAT EMPTOR!  Some of the others I localised may not want to be, which
 177 # could cause "use of undefined value" or other bugs.
 178 my ($function, %function_table, %parametertypes, $declaration_purpose);
 179 my %nosymbol_table = ();
 180 my $declaration_start_line;
 181 my ($type, $declaration_name, $return_type);
 182 my ($newsection, $newcontents, $prototype, $brcount, %source_map);
 183
 184 if (defined($ENV{'KBUILD_VERBOSE'}) && $ENV{'KBUILD_VERBOSE'} =~ '1') {
 185     $verbose = 1;
 186 }
 187
 188 if (defined($ENV{'KCFLAGS'})) {
 189     my $kcflags = "$ENV{'KCFLAGS'}";
 190
 191     if ($kcflags =~ /(\s|^)-Werror(\s|$)/) {
 192         $Werror = 1;
 193     }
 194 }
 195
 196 # reading this variable is for backwards compat just in case
 197 # someone was calling it with the variable from outside the
 198 # kernel's build system
 199 if (defined($ENV{'KDOC_WERROR'})) {
 200     $Werror = "$ENV{'KDOC_WERROR'}";
 201 }
 202 # other environment variables are converted to command-line
 203 # arguments in cmd_checkdoc in the build system
 204
 205 # Generated docbook code is inserted in a template at a point where
 206 # docbook v3.1 requires a non-zero sequence of RefEntry's; see:
 207 # https://www.oasis-open.org/docbook/documentation/reference/html/refentry.html
 208 # We keep track of number of generated entries and generate a dummy
 209 # if needs be to ensure the expanded template can be postprocessed
 210 # into html.
 211 my $section_counter = 0;
 212
 213 my $lineprefix="";
 214
 215 # Parser states
 216 use constant {
 217     STATE_NORMAL        => 0,        # normal code
 218     STATE_NAME          => 1,        # looking for function name
 219     STATE_BODY_MAYBE    => 2,        # body - or maybe more description
 220     STATE_BODY          => 3,        # the body of the comment
 221     STATE_BODY_WITH_BLANK_LINE => 4, # the body, which has a blank line
 222     STATE_PROTO         => 5,        # scanning prototype
 223     STATE_DOCBLOCK      => 6,        # documentation block
 224     STATE_INLINE        => 7,        # gathering doc outside main block
 225 };
 226 my $state;
 227 my $in_doc_sect;
 228 my $leading_space;
 229
 230 # Inline documentation state
 231 use constant {
 232     STATE_INLINE_NA     => 0, # not applicable ($state != STATE_INLINE)
 233     STATE_INLINE_NAME   => 1, # looking for member name (@foo:)
 234     STATE_INLINE_TEXT   => 2, # looking for member documentation
 235     STATE_INLINE_END    => 3, # done
 236     STATE_INLINE_ERROR  => 4, # error - Comment without header was found.
 237                               # Spit a warning as it's not
 238                               # proper kernel-doc and ignore the rest.
 239 };
 240 my $inline_doc_state;
 241
 242 #declaration types: can be
 243 # 'function', 'struct', 'union', 'enum', 'typedef'
 244 my $decl_type;
 245
 246 # Name of the kernel-doc identifier for non-DOC markups
 247 my $identifier;
 248
 249 my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
 250 my $doc_end = '\*/';
 251 my $doc_com = '\s*\*\s*';
 252 my $doc_com_body = '\s*\* ?';
 253 my $doc_decl = $doc_com . '(\w+)';
 254 # @params and a strictly limited set of supported section names
 255 # Specifically:
 256 #   Match @word:
 257 #         @...:
 258 #         @{section-name}:
 259 # while trying to not match literal block starts like "example::"
 260 #
 261 my $doc_sect = $doc_com .
 262     '\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:([^:].*)?$';
 263 my $doc_content = $doc_com_body . '(.*)';
 264 my $doc_block = $doc_com . 'DOC:\s*(.*)?';
 265 my $doc_inline_start = '^\s*/\*\*\s*$';
 266 my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
 267 my $doc_inline_end = '^\s*\*/\s*$';
 268 my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
 269 my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
 270 my $export_symbol_ns = '^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*\w+\)\s*;';
 271 my $function_pointer = qr{([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)};
 272 my $attribute = qr{__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)}i;
 273
 274 my %parameterdescs;
 275 my %parameterdesc_start_lines;
 276 my @parameterlist;
 277 my %sections;
 278 my @sectionlist;
 279 my %section_start_lines;
 280 my $sectcheck;
 281 my $struct_actual;
 282
 283 my $contents = "";
 284 my $new_start_line = 0;
 285
 286 # the canonical section names. see also $doc_sect above.
 287 my $section_default = "Description";    # default section
 288 my $section_intro = "Introduction";
 289 my $section = $section_default;
 290 my $section_context = "Context";
 291 my $section_return = "Return";
 292
 293 my $undescribed = "-- undescribed --";
 294
 295 reset_state();
 296
 297 while ($ARGV[0] =~ m/^--?(.*)/) {
 298     my $cmd = $1;
 299     shift @ARGV;
 300     if ($cmd eq "man") {
 301         $output_mode = "man";
 302         @highlights = @highlights_man;
 303         $blankline = $blankline_man;
 304     } elsif ($cmd eq "rst") {
 305         $output_mode = "rst";
 306         @highlights = @highlights_rst;
 307         $blankline = $blankline_rst;
 308     } elsif ($cmd eq "none") {
 309         $output_mode = "none";
 310     } elsif ($cmd eq "module") { # not needed for XML, inherits from calling document
 311         $modulename = shift @ARGV;
 312     } elsif ($cmd eq "function") { # to only output specific functions
 313         $output_selection = OUTPUT_INCLUDE;
 314         $function = shift @ARGV;
 315         $function_table{$function} = 1;
 316     } elsif ($cmd eq "nosymbol") { # Exclude specific symbols
 317         my $symbol = shift @ARGV;
 318         $nosymbol_table{$symbol} = 1;
 319     } elsif ($cmd eq "export") { # only exported symbols
 320         $output_selection = OUTPUT_EXPORTED;
 321         %function_table = ();
 322     } elsif ($cmd eq "internal") { # only non-exported symbols
 323         $output_selection = OUTPUT_INTERNAL;
 324         %function_table = ();
 325     } elsif ($cmd eq "export-file") {
 326         my $file = shift @ARGV;
 327         push(@export_file_list, $file);
 328     } elsif ($cmd eq "v") {
 329         $verbose = 1;
 330     } elsif ($cmd eq "Werror") {
 331         $Werror = 1;
 332     } elsif ($cmd eq "Wreturn") {
 333         $Wreturn = 1;
 334     } elsif ($cmd eq "Wshort-desc" or $cmd eq "Wshort-description") {
 335         $Wshort_desc = 1;
 336     } elsif ($cmd eq "Wcontents-before-sections") {
 337         $Wcontents_before_sections = 1;
 338     } elsif ($cmd eq "Wall") {
 339         $Wreturn = 1;
 340         $Wshort_desc = 1;
 341         $Wcontents_before_sections = 1;
 342     } elsif (($cmd eq "h") || ($cmd eq "help")) {
 343         pod2usage(-exitval => 0, -verbose => 2);
 344     } elsif ($cmd eq 'no-doc-sections') {
 345         $no_doc_sections = 1;
 346     } elsif ($cmd eq 'enable-lineno') {
 347         $enable_lineno = 1;
 348     } elsif ($cmd eq 'show-not-found') {
 349         $show_not_found = 1;  # A no-op but don't fail
 350     } elsif ($cmd eq "sphinx-version") {
 351         my $ver_string = shift @ARGV;
 352         if ($ver_string =~ m/^(\d+)(\.\d+)?(\.\d+)?/) {
 353             $sphinx_major = $1;
 354             if (defined($2)) {
 355                 $sphinx_minor = substr($2,1);
 356             } else {
 357                 $sphinx_minor = 0;
 358             }
 359             if (defined($3)) {
 360                 $sphinx_patch = substr($3,1)
 361             } else {
 362                 $sphinx_patch = 0;
 363             }
 364         } else {
 365             die "Sphinx version should either major.minor or major.minor.patch format\n";
 366         }
 367     } else {
 368         # Unknown argument
 369         pod2usage(
 370             -message => "Argument unknown!\n",
 371             -exitval => 1,
 372             -verbose => 99,
 373             -sections => 'SYNOPSIS',
 374             -output => \*STDERR,
 375             );
 376     }
 377     if ($#ARGV < 0){
 378         pod2usage(
 379             -message => "FILE argument missing\n",
 380             -exitval => 1,
 381             -verbose => 99,
 382             -sections => 'SYNOPSIS',
 383             -output => \*STDERR,
 384             );
 385     }
 386 }
 387
 388 # continue execution near EOF;
 389
 390 # The C domain dialect changed on Sphinx 3. So, we need to check the
 391 # version in order to produce the right tags.
 392 sub findprog($)
 393 {
 394     foreach(split(/:/, $ENV{PATH})) {
 395         return "$_/$_[0]" if(-x "$_/$_[0]");
 396     }
 397 }
 398
 399 sub get_sphinx_version()
 400 {
 401     my $ver;
 402
 403     my $cmd = "sphinx-build";
 404     if (!findprog($cmd)) {
 405         my $cmd = "sphinx-build3";
 406         if (!findprog($cmd)) {
 407             $sphinx_major = 1;
 408             $sphinx_minor = 2;
 409             $sphinx_patch = 0;
 410             printf STDERR "Warning: Sphinx version not found. Using default (Sphinx version %d.%d.%d)\n",
 411                    $sphinx_major, $sphinx_minor, $sphinx_patch;
 412             return;
 413         }
 414     }
 415
 416     open IN, "$cmd --version 2>&1 |";
 417     while (<IN>) {
 418         if (m/^\s*sphinx-build\s+([\d]+)\.([\d\.]+)(\+\/[\da-f]+)?$/) {
 419             $sphinx_major = $1;
 420             $sphinx_minor = $2;
 421             $sphinx_patch = $3;
 422             last;
 423         }
 424         # Sphinx 1.2.x uses a different format
 425         if (m/^\s*Sphinx.*\s+([\d]+)\.([\d\.]+)$/) {
 426             $sphinx_major = $1;
 427             $sphinx_minor = $2;
 428             $sphinx_patch = $3;
 429             last;
 430         }
 431     }
 432     close IN;
 433 }
 434
 435 # get kernel version from env
 436 sub get_kernel_version() {
 437     my $version = 'unknown kernel version';
 438
 439     if (defined($ENV{'KERNELVERSION'})) {
 440         $version = $ENV{'KERNELVERSION'};
 441     }
 442     return $version;
 443 }
 444
 445 #
 446 sub print_lineno {
 447     my $lineno = shift;
 448     if ($enable_lineno && defined($lineno)) {
 449         print ".. LINENO " . $lineno . "\n";
 450     }
 451 }
 452
 453 sub emit_warning {
 454     my $location = shift;
 455     my $msg = shift;
 456     print STDERR "$location: warning: $msg";
 457     ++$warnings;
 458 }
 459 ##
 460 # dumps section contents to arrays/hashes intended for that purpose.
 461 #
 462 sub dump_section {
 463     my $file = shift;
 464     my $name = shift;
 465     my $contents = join "\n", @_;
 466
 467     if ($name =~ m/$type_param/) {
 468         $name = $1;
 469         $parameterdescs{$name} = $contents;
 470         $sectcheck = $sectcheck . $name . " ";
 471         $parameterdesc_start_lines{$name} = $new_start_line;
 472         $new_start_line = 0;
 473     } elsif ($name eq "@\.\.\.") {
 474         $name = "...";
 475         $parameterdescs{$name} = $contents;
 476         $sectcheck = $sectcheck . $name . " ";
 477         $parameterdesc_start_lines{$name} = $new_start_line;
 478         $new_start_line = 0;
 479     } else {
 480         if (defined($sections{$name}) && ($sections{$name} ne "")) {
 481             # Only warn on user specified duplicate section names.
 482             if ($name ne $section_default) {
 483                 emit_warning("${file}:$.", "duplicate section name '$name'\n");
 484             }
 485             $sections{$name} .= $contents;
 486         } else {
 487             $sections{$name} = $contents;
 488             push @sectionlist, $name;
 489             $section_start_lines{$name} = $new_start_line;
 490             $new_start_line = 0;
 491         }
 492     }
 493 }
 494
 495 ##
 496 # dump DOC: section after checking that it should go out
 497 #
 498 sub dump_doc_section {
 499     my $file = shift;
 500     my $name = shift;
 501     my $contents = join "\n", @_;
 502
 503     if ($no_doc_sections) {
 504         return;
 505     }
 506
 507     return if (defined($nosymbol_table{$name}));
 508
 509     if (($output_selection == OUTPUT_ALL) ||
 510         (($output_selection == OUTPUT_INCLUDE) &&
 511          defined($function_table{$name})))
 512     {
 513         dump_section($file, $name, $contents);
 514         output_blockhead({'sectionlist' => \@sectionlist,
 515                           'sections' => \%sections,
 516                           'module' => $modulename,
 517                           'content-only' => ($output_selection != OUTPUT_ALL), });
 518     }
 519 }
 520
 521 ##
 522 # output function
 523 #
 524 # parameterdescs, a hash.
 525 #  function => "function name"
 526 #  parameterlist => @list of parameters
 527 #  parameterdescs => %parameter descriptions
 528 #  sectionlist => @list of sections
 529 #  sections => %section descriptions
 530 #
 531
 532 sub output_highlight {
 533     my $contents = join "\n",@_;
 534     my $line;
 535
 536 #   DEBUG
 537 #   if (!defined $contents) {
 538 #       use Carp;
 539 #       confess "output_highlight got called with no args?\n";
 540 #   }
 541
 542 #   print STDERR "contents b4:$contents\n";
 543     eval $dohighlight;
 544     die $@ if $@;
 545 #   print STDERR "contents af:$contents\n";
 546
 547     foreach $line (split "\n", $contents) {
 548         if (! $output_preformatted) {
 549             $line =~ s/^\s*//;
 550         }
 551         if ($line eq ""){
 552             if (! $output_preformatted) {
 553                 print $lineprefix, $blankline;
 554             }
 555         } else {
 556             if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
 557                 print "\\&$line";
 558             } else {
 559                 print $lineprefix, $line;
 560             }
 561         }
 562         print "\n";
 563     }
 564 }
 565
 566 ##
 567 # output function in man
 568 sub output_function_man(%) {
 569     my %args = %{$_[0]};
 570     my ($parameter, $section);
 571     my $count;
 572     my $func_macro = $args{'func_macro'};
 573     my $paramcount = $#{$args{'parameterlist'}}; # -1 is empty
 574
 575     print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
 576
 577     print ".SH NAME\n";
 578     print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
 579
 580     print ".SH SYNOPSIS\n";
 581     if ($args{'functiontype'} ne "") {
 582         print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
 583     } else {
 584         print ".B \"" . $args{'function'} . "\n";
 585     }
 586     $count = 0;
 587     my $parenth = "(";
 588     my $post = ",";
 589     foreach my $parameter (@{$args{'parameterlist'}}) {
 590         if ($count == $#{$args{'parameterlist'}}) {
 591             $post = ");";
 592         }
 593         $type = $args{'parametertypes'}{$parameter};
 594         if ($type =~ m/$function_pointer/) {
 595             # pointer-to-function
 596             print ".BI \"" . $parenth . $1 . "\" " . " \") (" . $2 . ")" . $post . "\"\n";
 597         } else {
 598             $type =~ s/([^\*])$/$1 /;
 599             print ".BI \"" . $parenth . $type . "\" " . " \"" . $post . "\"\n";
 600         }
 601         $count++;
 602         $parenth = "";
 603     }
 604
 605     $paramcount = $#{$args{'parameterlist'}}; # -1 is empty
 606     if ($paramcount >= 0) {
 607         print ".SH ARGUMENTS\n";
 608         }
 609     foreach $parameter (@{$args{'parameterlist'}}) {
 610         my $parameter_name = $parameter;
 611         $parameter_name =~ s/\[.*//;
 612
 613         print ".IP \"" . $parameter . "\" 12\n";
 614         output_highlight($args{'parameterdescs'}{$parameter_name});
 615     }
 616     foreach $section (@{$args{'sectionlist'}}) {
 617         print ".SH \"", uc $section, "\"\n";
 618         output_highlight($args{'sections'}{$section});
 619     }
 620 }
 621
 622 ##
 623 # output enum in man
 624 sub output_enum_man(%) {
 625     my %args = %{$_[0]};
 626     my ($parameter, $section);
 627     my $count;
 628
 629     print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
 630
 631     print ".SH NAME\n";
 632     print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
 633
 634     print ".SH SYNOPSIS\n";
 635     print "enum " . $args{'enum'} . " {\n";
 636     $count = 0;
 637     foreach my $parameter (@{$args{'parameterlist'}}) {
 638         print ".br\n.BI \"    $parameter\"\n";
 639         if ($count == $#{$args{'parameterlist'}}) {
 640             print "\n};\n";
 641             last;
 642         } else {
 643             print ", \n.br\n";
 644         }
 645         $count++;
 646     }
 647
 648     print ".SH Constants\n";
 649     foreach $parameter (@{$args{'parameterlist'}}) {
 650         my $parameter_name = $parameter;
 651         $parameter_name =~ s/\[.*//;
 652
 653         print ".IP \"" . $parameter . "\" 12\n";
 654         output_highlight($args{'parameterdescs'}{$parameter_name});
 655     }
 656     foreach $section (@{$args{'sectionlist'}}) {
 657         print ".SH \"$section\"\n";
 658         output_highlight($args{'sections'}{$section});
 659     }
 660 }
 661
 662 ##
 663 # output struct in man
 664 sub output_struct_man(%) {
 665     my %args = %{$_[0]};
 666     my ($parameter, $section);
 667
 668     print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
 669
 670     print ".SH NAME\n";
 671     print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
 672
 673     my $declaration = $args{'definition'};
 674     $declaration =~ s/\t/  /g;
 675     $declaration =~ s/\n/"\n.br\n.BI \"/g;
 676     print ".SH SYNOPSIS\n";
 677     print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
 678     print ".BI \"$declaration\n};\n.br\n\n";
 679
 680     print ".SH Members\n";
 681     foreach $parameter (@{$args{'parameterlist'}}) {
 682         ($parameter =~ /^#/) && next;
 683
 684         my $parameter_name = $parameter;
 685         $parameter_name =~ s/\[.*//;
 686
 687         ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
 688         print ".IP \"" . $parameter . "\" 12\n";
 689         output_highlight($args{'parameterdescs'}{$parameter_name});
 690     }
 691     foreach $section (@{$args{'sectionlist'}}) {
 692         print ".SH \"$section\"\n";
 693         output_highlight($args{'sections'}{$section});
 694     }
 695 }
 696
 697 ##
 698 # output typedef in man
 699 sub output_typedef_man(%) {
 700     my %args = %{$_[0]};
 701     my ($parameter, $section);
 702
 703     print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
 704
 705     print ".SH NAME\n";
 706     print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
 707
 708     foreach $section (@{$args{'sectionlist'}}) {
 709         print ".SH \"$section\"\n";
 710         output_highlight($args{'sections'}{$section});
 711     }
 712 }
 713
 714 sub output_blockhead_man(%) {
 715     my %args = %{$_[0]};
 716     my ($parameter, $section);
 717     my $count;
 718
 719     print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
 720
 721     foreach $section (@{$args{'sectionlist'}}) {
 722         print ".SH \"$section\"\n";
 723         output_highlight($args{'sections'}{$section});
 724     }
 725 }
 726
 727 ##
 728 # output in restructured text
 729 #
 730
 731 #
 732 # This could use some work; it's used to output the DOC: sections, and
 733 # starts by putting out the name of the doc section itself, but that tends
 734 # to duplicate a header already in the template file.
 735 #
 736 sub output_blockhead_rst(%) {
 737     my %args = %{$_[0]};
 738     my ($parameter, $section);
 739
 740     foreach $section (@{$args{'sectionlist'}}) {
 741         next if (defined($nosymbol_table{$section}));
 742
 743         if ($output_selection != OUTPUT_INCLUDE) {
 744             print ".. _$section:\n\n";
 745             print "**$section**\n\n";
 746         }
 747         print_lineno($section_start_lines{$section});
 748         output_highlight_rst($args{'sections'}{$section});
 749         print "\n";
 750     }
 751 }
 752
 753 #
 754 # Apply the RST highlights to a sub-block of text.
 755 #
 756 sub highlight_block($) {
 757     # The dohighlight kludge requires the text be called $contents
 758     my $contents = shift;
 759     eval $dohighlight;
 760     die $@ if $@;
 761     return $contents;
 762 }
 763
 764 #
 765 # Regexes used only here.
 766 #
 767 my $sphinx_literal = '^[^.].*::$';
 768 my $sphinx_cblock = '^\.\.\ +code-block::';
 769
 770 sub output_highlight_rst {
 771     my $input = join "\n",@_;
 772     my $output = "";
 773     my $line;
 774     my $in_literal = 0;
 775     my $litprefix;
 776     my $block = "";
 777
 778     foreach $line (split "\n",$input) {
 779         #
 780         # If we're in a literal block, see if we should drop out
 781         # of it.  Otherwise pass the line straight through unmunged.
 782         #
 783         if ($in_literal) {
 784             if (! ($line =~ /^\s*$/)) {
 785                 #
 786                 # If this is the first non-blank line in a literal
 787                 # block we need to figure out what the proper indent is.
 788                 #
 789                 if ($litprefix eq "") {
 790                     $line =~ /^(\s*)/;
 791                     $litprefix = '^' . $1;
 792                     $output .= $line . "\n";
 793                 } elsif (! ($line =~ /$litprefix/)) {
 794                     $in_literal = 0;
 795                 } else {
 796                     $output .= $line . "\n";
 797                 }
 798             } else {
 799                 $output .= $line . "\n";
 800             }
 801         }
 802         #
 803         # Not in a literal block (or just dropped out)
 804         #
 805         if (! $in_literal) {
 806             $block .= $line . "\n";
 807             if (($line =~ /$sphinx_literal/) || ($line =~ /$sphinx_cblock/)) {
 808                 $in_literal = 1;
 809                 $litprefix = "";
 810                 $output .= highlight_block($block);
 811                 $block = ""
 812             }
 813         }
 814     }
 815
 816     if ($block) {
 817         $output .= highlight_block($block);
 818     }
 819     foreach $line (split "\n", $output) {
 820         print $lineprefix . $line . "\n";
 821     }
 822 }
 823
 824 sub output_function_rst(%) {
 825     my %args = %{$_[0]};
 826     my ($parameter, $section);
 827     my $oldprefix = $lineprefix;
 828
 829     my $signature = "";
 830     my $func_macro = $args{'func_macro'};
 831     my $paramcount = $#{$args{'parameterlist'}}; # -1 is empty
 832
 833         if ($func_macro) {
 834         $signature = $args{'function'};
 835         } else {
 836                 if ($args{'functiontype'}) {
 837                 $signature = $args{'functiontype'} . " ";
 838                 }
 839                 $signature .= $args{'function'} . " (";
 840     }
 841
 842     my $count = 0;
 843     foreach my $parameter (@{$args{'parameterlist'}}) {
 844         if ($count ne 0) {
 845             $signature .= ", ";
 846         }
 847         $count++;
 848         $type = $args{'parametertypes'}{$parameter};
 849
 850         if ($type =~ m/$function_pointer/) {
 851             # pointer-to-function
 852             $signature .= $1 . $parameter . ") (" . $2 . ")";
 853         } else {
 854             $signature .= $type;
 855         }
 856     }
 857
 858     if (!$func_macro) {
 859         $signature .= ")";
 860     }
 861
 862     if ($sphinx_major < 3) {
 863         if ($args{'typedef'}) {
 864             print ".. c:type:: ". $args{'function'} . "\n\n";
 865             print_lineno($declaration_start_line);
 866             print "   **Typedef**: ";
 867             $lineprefix = "";
 868             output_highlight_rst($args{'purpose'});
 869             print "\n\n**Syntax**\n\n";
 870             print "  ``$signature``\n\n";
 871         } else {
 872             print ".. c:function:: $signature\n\n";
 873         }
 874     } else {
 875         if ($args{'typedef'} || $args{'functiontype'} eq "") {
 876             print ".. c:macro:: ". $args{'function'} . "\n\n";
 877
 878             if ($args{'typedef'}) {
 879                 print_lineno($declaration_start_line);
 880                 print "   **Typedef**: ";
 881                 $lineprefix = "";
 882                 output_highlight_rst($args{'purpose'});
 883                 print "\n\n**Syntax**\n\n";
 884                 print "  ``$signature``\n\n";
 885             } else {
 886                 print "``$signature``\n\n";
 887             }
 888         } else {
 889             print ".. c:function:: $signature\n\n";
 890         }
 891     }
 892
 893     if (!$args{'typedef'}) {
 894         print_lineno($declaration_start_line);
 895         $lineprefix = "   ";
 896         output_highlight_rst($args{'purpose'});
 897         print "\n";
 898     }
 899
 900     #
 901     # Put our descriptive text into a container (thus an HTML <div>) to help
 902     # set the function prototypes apart.
 903     #
 904     $lineprefix = "  ";
 905         if ($paramcount >= 0) {
 906         print ".. container:: kernelindent\n\n";
 907                 print $lineprefix . "**Parameters**\n\n";
 908     }
 909     foreach $parameter (@{$args{'parameterlist'}}) {
 910         my $parameter_name = $parameter;
 911         $parameter_name =~ s/\[.*//;
 912         $type = $args{'parametertypes'}{$parameter};
 913
 914         if ($type ne "") {
 915             print $lineprefix . "``$type``\n";
 916         } else {
 917             print $lineprefix . "``$parameter``\n";
 918         }
 919
 920         print_lineno($parameterdesc_start_lines{$parameter_name});
 921
 922         $lineprefix = "    ";
 923         if (defined($args{'parameterdescs'}{$parameter_name}) &&
 924             $args{'parameterdescs'}{$parameter_name} ne $undescribed) {
 925             output_highlight_rst($args{'parameterdescs'}{$parameter_name});
 926         } else {
 927             print $lineprefix . "*undescribed*\n";
 928         }
 929         $lineprefix = "  ";
 930         print "\n";
 931     }
 932
 933     output_section_rst(@_);
 934     $lineprefix = $oldprefix;
 935 }
 936
 937 sub output_section_rst(%) {
 938     my %args = %{$_[0]};
 939     my $section;
 940     my $oldprefix = $lineprefix;
 941
 942     foreach $section (@{$args{'sectionlist'}}) {
 943         print $lineprefix . "**$section**\n\n";
 944         print_lineno($section_start_lines{$section});
 945         output_highlight_rst($args{'sections'}{$section});
 946         print "\n";
 947     }
 948     print "\n";
 949 }
 950
 951 sub output_enum_rst(%) {
 952     my %args = %{$_[0]};
 953     my ($parameter);
 954     my $oldprefix = $lineprefix;
 955     my $count;
 956     my $outer;
 957
 958     if ($sphinx_major < 3) {
 959         my $name = "enum " . $args{'enum'};
 960         print "\n\n.. c:type:: " . $name . "\n\n";
 961     } else {
 962         my $name = $args{'enum'};
 963         print "\n\n.. c:enum:: " . $name . "\n\n";
 964     }
 965     print_lineno($declaration_start_line);
 966     $lineprefix = "  ";
 967     output_highlight_rst($args{'purpose'});
 968     print "\n";
 969
 970     print ".. container:: kernelindent\n\n";
 971     $outer = $lineprefix . "  ";
 972     $lineprefix = $outer . "  ";
 973     print $outer . "**Constants**\n\n";
 974     foreach $parameter (@{$args{'parameterlist'}}) {
 975         print $outer . "``$parameter``\n";
 976
 977         if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
 978             output_highlight_rst($args{'parameterdescs'}{$parameter});
 979         } else {
 980             print $lineprefix . "*undescribed*\n";
 981         }
 982         print "\n";
 983     }
 984     print "\n";
 985     $lineprefix = $oldprefix;
 986     output_section_rst(@_);
 987 }
 988
 989 sub output_typedef_rst(%) {
 990     my %args = %{$_[0]};
 991     my ($parameter);
 992     my $oldprefix = $lineprefix;
 993     my $name;
 994
 995     if ($sphinx_major < 3) {
 996         $name = "typedef " . $args{'typedef'};
 997     } else {
 998         $name = $args{'typedef'};
 999     }
1000     print "\n\n.. c:type:: " . $name . "\n\n";
1001     print_lineno($declaration_start_line);
1002     $lineprefix = "   ";
1003     output_highlight_rst($args{'purpose'});
1004     print "\n";
1005
1006     $lineprefix = $oldprefix;
1007     output_section_rst(@_);
1008 }
1009
1010 sub output_struct_rst(%) {
1011     my %args = %{$_[0]};
1012     my ($parameter);
1013     my $oldprefix = $lineprefix;
1014
1015     if ($sphinx_major < 3) {
1016         my $name = $args{'type'} . " " . $args{'struct'};
1017         print "\n\n.. c:type:: " . $name . "\n\n";
1018     } else {
1019         my $name = $args{'struct'};
1020         if ($args{'type'} eq 'union') {
1021             print "\n\n.. c:union:: " . $name . "\n\n";
1022         } else {
1023             print "\n\n.. c:struct:: " . $name . "\n\n";
1024         }
1025     }
1026     print_lineno($declaration_start_line);
1027     $lineprefix = "  ";
1028     output_highlight_rst($args{'purpose'});
1029     print "\n";
1030
1031     print ".. container:: kernelindent\n\n";
1032     print $lineprefix . "**Definition**::\n\n";
1033     my $declaration = $args{'definition'};
1034     $lineprefix = $lineprefix . "  ";
1035     $declaration =~ s/\t/$lineprefix/g;
1036     print $lineprefix . $args{'type'} . " " . $args{'struct'} . " {\n$declaration" . $lineprefix . "};\n\n";
1037
1038     $lineprefix = "  ";
1039     print $lineprefix . "**Members**\n\n";
1040     foreach $parameter (@{$args{'parameterlist'}}) {
1041         ($parameter =~ /^#/) && next;
1042
1043         my $parameter_name = $parameter;
1044         $parameter_name =~ s/\[.*//;
1045
1046         ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
1047         $type = $args{'parametertypes'}{$parameter};
1048         print_lineno($parameterdesc_start_lines{$parameter_name});
1049         print $lineprefix . "``" . $parameter . "``\n";
1050         $lineprefix = "    ";
1051         output_highlight_rst($args{'parameterdescs'}{$parameter_name});
1052         $lineprefix = "  ";
1053         print "\n";
1054     }
1055     print "\n";
1056
1057     $lineprefix = $oldprefix;
1058     output_section_rst(@_);
1059 }
1060
1061 ## none mode output functions
1062
1063 sub output_function_none(%) {
1064 }
1065
1066 sub output_enum_none(%) {
1067 }
1068
1069 sub output_typedef_none(%) {
1070 }
1071
1072 sub output_struct_none(%) {
1073 }
1074
1075 sub output_blockhead_none(%) {
1076 }
1077
1078 ##
1079 # generic output function for all types (function, struct/union, typedef, enum);
1080 # calls the generated, variable output_ function name based on
1081 # functype and output_mode
1082 sub output_declaration {
1083     no strict 'refs';
1084     my $name = shift;
1085     my $functype = shift;
1086     my $func = "output_${functype}_$output_mode";
1087
1088     return if (defined($nosymbol_table{$name}));
1089
1090     if (($output_selection == OUTPUT_ALL) ||
1091         (($output_selection == OUTPUT_INCLUDE ||
1092           $output_selection == OUTPUT_EXPORTED) &&
1093          defined($function_table{$name})) ||
1094         ($output_selection == OUTPUT_INTERNAL &&
1095          !($functype eq "function" && defined($function_table{$name}))))
1096     {
1097         &$func(@_);
1098         $section_counter++;
1099     }
1100 }
1101
1102 ##
1103 # generic output function - calls the right one based on current output mode.
1104 sub output_blockhead {
1105     no strict 'refs';
1106     my $func = "output_blockhead_" . $output_mode;
1107     &$func(@_);
1108     $section_counter++;
1109 }
1110
1111 ##
1112 # takes a declaration (struct, union, enum, typedef) and
1113 # invokes the right handler. NOT called for functions.
1114 sub dump_declaration($$) {
1115     no strict 'refs';
1116     my ($prototype, $file) = @_;
1117     my $func = "dump_" . $decl_type;
1118     &$func(@_);
1119 }
1120
1121 sub dump_union($$) {
1122     dump_struct(@_);
1123 }
1124
1125 sub dump_struct($$) {
1126     my $x = shift;
1127     my $file = shift;
1128     my $decl_type;
1129     my $members;
1130     my $type = qr{struct|union};
1131     # For capturing struct/union definition body, i.e. "{members*}qualifiers*"
1132     my $qualifiers = qr{$attribute|__packed|__aligned|____cacheline_aligned_in_smp|____cacheline_aligned};
1133     my $definition_body = qr{\{(.*)\}\s*$qualifiers*};
1134     my $struct_members = qr{($type)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;};
1135
1136     if ($x =~ /($type)\s+(\w+)\s*$definition_body/) {
1137         $decl_type = $1;
1138         $declaration_name = $2;
1139         $members = $3;
1140     } elsif ($x =~ /typedef\s+($type)\s*$definition_body\s*(\w+)\s*;/) {
1141         $decl_type = $1;
1142         $declaration_name = $3;
1143         $members = $2;
1144     }
1145
1146     if ($members) {
1147         if ($identifier ne $declaration_name) {
1148             emit_warning("${file}:$.", "expecting prototype for $decl_type $identifier. Prototype was for $decl_type $declaration_name instead\n");
1149             return;
1150         }
1151
1152         # ignore members marked private:
1153         $members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1154         $members =~ s/\/\*\s*private:.*//gosi;
1155         # strip comments:
1156         $members =~ s/\/\*.*?\*\///gos;
1157         # strip attributes
1158         $members =~ s/\s*$attribute/ /gi;
1159         $members =~ s/\s*__aligned\s*\([^;]*\)/ /gos;
1160         $members =~ s/\s*__counted_by\s*\([^;]*\)/ /gos;
1161         $members =~ s/\s*__counted_by_(le|be)\s*\([^;]*\)/ /gos;
1162         $members =~ s/\s*__packed\s*/ /gos;
1163         $members =~ s/\s*CRYPTO_MINALIGN_ATTR/ /gos;
1164         $members =~ s/\s*____cacheline_aligned_in_smp/ /gos;
1165         $members =~ s/\s*____cacheline_aligned/ /gos;
1166         # unwrap struct_group():
1167         # - first eat non-declaration parameters and rewrite for final match
1168         # - then remove macro, outer parens, and trailing semicolon
1169         $members =~ s/\bstruct_group\s*\(([^,]*,)/STRUCT_GROUP(/gos;
1170         $members =~ s/\bstruct_group_attr\s*\(([^,]*,){2}/STRUCT_GROUP(/gos;
1171         $members =~ s/\bstruct_group_tagged\s*\(([^,]*),([^,]*),/struct $1 $2; STRUCT_GROUP(/gos;
1172         $members =~ s/\b__struct_group\s*\(([^,]*,){3}/STRUCT_GROUP(/gos;
1173         $members =~ s/\bSTRUCT_GROUP(\(((?:(?>[^)(]+)|(?1))*)\))[^;]*;/$2/gos;
1174
1175         my $args = qr{([^,)]+)};
1176         # replace DECLARE_BITMAP
1177         $members =~ s/__ETHTOOL_DECLARE_LINK_MODE_MASK\s*\(([^\)]+)\)/DECLARE_BITMAP($1, __ETHTOOL_LINK_MODE_MASK_NBITS)/gos;
1178         $members =~ s/DECLARE_PHY_INTERFACE_MASK\s*\(([^\)]+)\)/DECLARE_BITMAP($1, PHY_INTERFACE_MODE_MAX)/gos;
1179         $members =~ s/DECLARE_BITMAP\s*\($args,\s*$args\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
1180         # replace DECLARE_HASHTABLE
1181         $members =~ s/DECLARE_HASHTABLE\s*\($args,\s*$args\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
1182         # replace DECLARE_KFIFO
1183         $members =~ s/DECLARE_KFIFO\s*\($args,\s*$args,\s*$args\)/$2 \*$1/gos;
1184         # replace DECLARE_KFIFO_PTR
1185         $members =~ s/DECLARE_KFIFO_PTR\s*\($args,\s*$args\)/$2 \*$1/gos;
1186         # replace DECLARE_FLEX_ARRAY
1187         $members =~ s/(?:__)?DECLARE_FLEX_ARRAY\s*\($args,\s*$args\)/$1 $2\[\]/gos;
1188         #replace DEFINE_DMA_UNMAP_ADDR
1189         $members =~ s/DEFINE_DMA_UNMAP_ADDR\s*\($args\)/dma_addr_t $1/gos;
1190         #replace DEFINE_DMA_UNMAP_LEN
1191         $members =~ s/DEFINE_DMA_UNMAP_LEN\s*\($args\)/__u32 $1/gos;
1192         my $declaration = $members;
1193
1194         # Split nested struct/union elements as newer ones
1195         while ($members =~ m/$struct_members/) {
1196             my $newmember;
1197             my $maintype = $1;
1198             my $ids = $4;
1199             my $content = $3;
1200             foreach my $id(split /,/, $ids) {
1201                 $newmember .= "$maintype $id; ";
1202
1203                 $id =~ s/[:\[].*//;
1204                 $id =~ s/^\s*\**(\S+)\s*/$1/;
1205                 foreach my $arg (split /;/, $content) {
1206                     next if ($arg =~ m/^\s*$/);
1207                     if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
1208                         # pointer-to-function
1209                         my $type = $1;
1210                         my $name = $2;
1211                         my $extra = $3;
1212                         next if (!$name);
1213                         if ($id =~ m/^\s*$/) {
1214                             # anonymous struct/union
1215                             $newmember .= "$type$name$extra; ";
1216                         } else {
1217                             $newmember .= "$type$id.$name$extra; ";
1218                         }
1219                     } else {
1220                         my $type;
1221                         my $names;
1222                         $arg =~ s/^\s+//;
1223                         $arg =~ s/\s+$//;
1224                         # Handle bitmaps
1225                         $arg =~ s/:\s*\d+\s*//g;
1226                         # Handle arrays
1227                         $arg =~ s/\[.*\]//g;
1228                         # The type may have multiple words,
1229                         # and multiple IDs can be defined, like:
1230                         #    const struct foo, *bar, foobar
1231                         # So, we remove spaces when parsing the
1232                         # names, in order to match just names
1233                         # and commas for the names
1234                         $arg =~ s/\s*,\s*/,/g;
1235                         if ($arg =~ m/(.*)\s+([\S+,]+)/) {
1236                             $type = $1;
1237                             $names = $2;
1238                         } else {
1239                             $newmember .= "$arg; ";
1240                             next;
1241                         }
1242                         foreach my $name (split /,/, $names) {
1243                             $name =~ s/^\s*\**(\S+)\s*/$1/;
1244                             next if (($name =~ m/^\s*$/));
1245                             if ($id =~ m/^\s*$/) {
1246                                 # anonymous struct/union
1247                                 $newmember .= "$type $name; ";
1248                             } else {
1249                                 $newmember .= "$type $id.$name; ";
1250                             }
1251                         }
1252                     }
1253                 }
1254             }
1255             $members =~ s/$struct_members/$newmember/;
1256         }
1257
1258         # Ignore other nested elements, like enums
1259         $members =~ s/(\{[^\{\}]*\})//g;
1260
1261         create_parameterlist($members, ';', $file, $declaration_name);
1262         check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
1263
1264         # Adjust declaration for better display
1265         $declaration =~ s/([\{;])/$1\n/g;
1266         $declaration =~ s/\}\s+;/};/g;
1267         # Better handle inlined enums
1268         do {} while ($declaration =~ s/(enum\s+\{[^\}]+),([^\n])/$1,\n$2/);
1269
1270         my @def_args = split /\n/, $declaration;
1271         my $level = 1;
1272         $declaration = "";
1273         foreach my $clause (@def_args) {
1274             $clause =~ s/^\s+//;
1275             $clause =~ s/\s+$//;
1276             $clause =~ s/\s+/ /;
1277             next if (!$clause);
1278             $level-- if ($clause =~ m/(\})/ && $level > 1);
1279             if (!($clause =~ m/^\s*#/)) {
1280                 $declaration .= "\t" x $level;
1281             }
1282             $declaration .= "\t" . $clause . "\n";
1283             $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
1284         }
1285         output_declaration($declaration_name,
1286                    'struct',
1287                    {'struct' => $declaration_name,
1288                     'module' => $modulename,
1289                     'definition' => $declaration,
1290                     'parameterlist' => \@parameterlist,
1291                     'parameterdescs' => \%parameterdescs,
1292                     'parametertypes' => \%parametertypes,
1293                     'sectionlist' => \@sectionlist,
1294                     'sections' => \%sections,
1295                     'purpose' => $declaration_purpose,
1296                     'type' => $decl_type
1297                    });
1298     } else {
1299         print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
1300         ++$errors;
1301     }
1302 }
1303
1304
1305 sub show_warnings($$) {
1306     my $functype = shift;
1307     my $name = shift;
1308
1309     return 0 if (defined($nosymbol_table{$name}));
1310
1311     return 1 if ($output_selection == OUTPUT_ALL);
1312
1313     if ($output_selection == OUTPUT_EXPORTED) {
1314         if (defined($function_table{$name})) {
1315             return 1;
1316         } else {
1317             return 0;
1318         }
1319     }
1320     if ($output_selection == OUTPUT_INTERNAL) {
1321         if (!($functype eq "function" && defined($function_table{$name}))) {
1322             return 1;
1323         } else {
1324             return 0;
1325         }
1326     }
1327     if ($output_selection == OUTPUT_INCLUDE) {
1328         if (defined($function_table{$name})) {
1329             return 1;
1330         } else {
1331             return 0;
1332         }
1333     }
1334     die("Please add the new output type at show_warnings()");
1335 }
1336
1337 sub dump_enum($$) {
1338     my $x = shift;
1339     my $file = shift;
1340     my $members;
1341
1342     # ignore members marked private:
1343     $x =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1344     $x =~ s/\/\*\s*private:.*}/}/gosi;
1345
1346     $x =~ s@/\*.*?\*/@@gos;     # strip comments.
1347     # strip #define macros inside enums
1348     $x =~ s@#\s*((define|ifdef|if)\s+|endif)[^;]*;@@gos;
1349
1350     if ($x =~ /typedef\s+enum\s*\{(.*)\}\s*(\w*)\s*;/) {
1351         $declaration_name = $2;
1352         $members = $1;
1353     } elsif ($x =~ /enum\s+(\w*)\s*\{(.*)\}/) {
1354         $declaration_name = $1;
1355         $members = $2;
1356     }
1357
1358     if ($members) {
1359         if ($identifier ne $declaration_name) {
1360             if ($identifier eq "") {
1361                 emit_warning("${file}:$.", "wrong kernel-doc identifier on line:\n");
1362             } else {
1363                 emit_warning("${file}:$.", "expecting prototype for enum $identifier. Prototype was for enum $declaration_name instead\n");
1364             }
1365             return;
1366         }
1367         $declaration_name = "(anonymous)" if ($declaration_name eq "");
1368
1369         my %_members;
1370
1371         $members =~ s/\s+$//;
1372         $members =~ s/\([^;]*?[\)]//g;
1373
1374         foreach my $arg (split ',', $members) {
1375             $arg =~ s/^\s*(\w+).*/$1/;
1376             push @parameterlist, $arg;
1377             if (!$parameterdescs{$arg}) {
1378                 $parameterdescs{$arg} = $undescribed;
1379                 if (show_warnings("enum", $declaration_name)) {
1380                     emit_warning("${file}:$.", "Enum value '$arg' not described in enum '$declaration_name'\n");
1381                 }
1382             }
1383             $_members{$arg} = 1;
1384         }
1385
1386         while (my ($k, $v) = each %parameterdescs) {
1387             if (!exists($_members{$k})) {
1388                 if (show_warnings("enum", $declaration_name)) {
1389                     emit_warning("${file}:$.", "Excess enum value '$k' description in '$declaration_name'\n");
1390                 }
1391             }
1392         }
1393
1394         output_declaration($declaration_name,
1395                            'enum',
1396                            {'enum' => $declaration_name,
1397                             'module' => $modulename,
1398                             'parameterlist' => \@parameterlist,
1399                             'parameterdescs' => \%parameterdescs,
1400                             'sectionlist' => \@sectionlist,
1401                             'sections' => \%sections,
1402                             'purpose' => $declaration_purpose
1403                            });
1404     } else {
1405         print STDERR "${file}:$.: error: Cannot parse enum!\n";
1406         ++$errors;
1407     }
1408 }
1409
1410 my $typedef_type = qr { ((?:\s+[\w\*]+\b){1,8})\s* }x;
1411 my $typedef_ident = qr { \*?\s*(\w\S+)\s* }x;
1412 my $typedef_args = qr { \s*\((.*)\); }x;
1413
1414 my $typedef1 = qr { typedef$typedef_type\($typedef_ident\)$typedef_args }x;
1415 my $typedef2 = qr { typedef$typedef_type$typedef_ident$typedef_args }x;
1416
1417 sub dump_typedef($$) {
1418     my $x = shift;
1419     my $file = shift;
1420
1421     $x =~ s@/\*.*?\*/@@gos;     # strip comments.
1422
1423     # Parse function typedef prototypes
1424     if ($x =~ $typedef1 || $x =~ $typedef2) {
1425         $return_type = $1;
1426         $declaration_name = $2;
1427         my $args = $3;
1428         $return_type =~ s/^\s+//;
1429
1430         if ($identifier ne $declaration_name) {
1431             emit_warning("${file}:$.", "expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n");
1432             return;
1433         }
1434
1435         create_parameterlist($args, ',', $file, $declaration_name);
1436
1437         output_declaration($declaration_name,
1438                            'function',
1439                            {'function' => $declaration_name,
1440                             'typedef' => 1,
1441                             'module' => $modulename,
1442                             'functiontype' => $return_type,
1443                             'parameterlist' => \@parameterlist,
1444                             'parameterdescs' => \%parameterdescs,
1445                             'parametertypes' => \%parametertypes,
1446                             'sectionlist' => \@sectionlist,
1447                             'sections' => \%sections,
1448                             'purpose' => $declaration_purpose
1449                            });
1450         return;
1451     }
1452
1453     while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
1454         $x =~ s/\(*.\)\s*;$/;/;
1455         $x =~ s/\[*.\]\s*;$/;/;
1456     }
1457
1458     if ($x =~ /typedef.*\s+(\w+)\s*;/) {
1459         $declaration_name = $1;
1460
1461         if ($identifier ne $declaration_name) {
1462             emit_warning("${file}:$.", "expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n");
1463             return;
1464         }
1465
1466         output_declaration($declaration_name,
1467                            'typedef',
1468                            {'typedef' => $declaration_name,
1469                             'module' => $modulename,
1470                             'sectionlist' => \@sectionlist,
1471                             'sections' => \%sections,
1472                             'purpose' => $declaration_purpose
1473                            });
1474     } else {
1475         print STDERR "${file}:$.: error: Cannot parse typedef!\n";
1476         ++$errors;
1477     }
1478 }
1479
1480 sub save_struct_actual($) {
1481     my $actual = shift;
1482
1483     # strip all spaces from the actual param so that it looks like one string item
1484     $actual =~ s/\s*//g;
1485     $struct_actual = $struct_actual . $actual . " ";
1486 }
1487
1488 sub create_parameterlist($$$$) {
1489     my $args = shift;
1490     my $splitter = shift;
1491     my $file = shift;
1492     my $declaration_name = shift;
1493     my $type;
1494     my $param;
1495
1496     # temporarily replace commas inside function pointer definition
1497     my $arg_expr = qr{\([^\),]+};
1498     while ($args =~ /$arg_expr,/) {
1499         $args =~ s/($arg_expr),/$1#/g;
1500     }
1501
1502     foreach my $arg (split($splitter, $args)) {
1503         # strip comments
1504         $arg =~ s/\/\*.*\*\///;
1505         # ignore argument attributes
1506         $arg =~ s/\sPOS0?\s/ /;
1507         # strip leading/trailing spaces
1508         $arg =~ s/^\s*//;
1509         $arg =~ s/\s*$//;
1510         $arg =~ s/\s+/ /;
1511
1512         if ($arg =~ /^#/) {
1513             # Treat preprocessor directive as a typeless variable just to fill
1514             # corresponding data structures "correctly". Catch it later in
1515             # output_* subs.
1516             push_parameter($arg, "", "", $file);
1517         } elsif ($arg =~ m/\(.+\)\s*\(/) {
1518             # pointer-to-function
1519             $arg =~ tr/#/,/;
1520             $arg =~ m/[^\(]+\(\*?\s*([\w\[\]\.]*)\s*\)/;
1521             $param = $1;
1522             $type = $arg;
1523             $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1524             save_struct_actual($param);
1525             push_parameter($param, $type, $arg, $file, $declaration_name);
1526         } elsif ($arg =~ m/\(.+\)\s*\[/) {
1527             # array-of-pointers
1528             $arg =~ tr/#/,/;
1529             $arg =~ m/[^\(]+\(\s*\*\s*([\w\[\]\.]*?)\s*(\s*\[\s*[\w]+\s*\]\s*)*\)/;
1530             $param = $1;
1531             $type = $arg;
1532             $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1533             save_struct_actual($param);
1534             push_parameter($param, $type, $arg, $file, $declaration_name);
1535         } elsif ($arg) {
1536             $arg =~ s/\s*:\s*/:/g;
1537             $arg =~ s/\s*\[/\[/g;
1538
1539             my @args = split('\s*,\s*', $arg);
1540             if ($args[0] =~ m/\*/) {
1541                 $args[0] =~ s/(\*+)\s*/ $1/;
1542             }
1543
1544             my @first_arg;
1545             if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
1546                 shift @args;
1547                 push(@first_arg, split('\s+', $1));
1548                 push(@first_arg, $2);
1549             } else {
1550                 @first_arg = split('\s+', shift @args);
1551             }
1552
1553             unshift(@args, pop @first_arg);
1554             $type = join " ", @first_arg;
1555
1556             foreach $param (@args) {
1557                 if ($param =~ m/^(\*+)\s*(.*)/) {
1558                     save_struct_actual($2);
1559
1560                     push_parameter($2, "$type $1", $arg, $file, $declaration_name);
1561                 } elsif ($param =~ m/(.*?):(\w+)/) {
1562                     if ($type ne "") { # skip unnamed bit-fields
1563                         save_struct_actual($1);
1564                         push_parameter($1, "$type:$2", $arg, $file, $declaration_name)
1565                     }
1566                 } else {
1567                     save_struct_actual($param);
1568                     push_parameter($param, $type, $arg, $file, $declaration_name);
1569                 }
1570             }
1571         }
1572     }
1573 }
1574
1575 sub push_parameter($$$$$) {
1576     my $param = shift;
1577     my $type = shift;
1578     my $org_arg = shift;
1579     my $file = shift;
1580     my $declaration_name = shift;
1581
1582     if (($anon_struct_union == 1) && ($type eq "") &&
1583         ($param eq "}")) {
1584         return;        # ignore the ending }; from anon. struct/union
1585     }
1586
1587     $anon_struct_union = 0;
1588     $param =~ s/[\[\)].*//;
1589
1590     if ($type eq "" && $param =~ /\.\.\.$/)
1591     {
1592         if (!$param =~ /\w\.\.\.$/) {
1593             # handles unnamed variable parameters
1594             $param = "...";
1595         } elsif ($param =~ /\w\.\.\.$/) {
1596             # for named variable parameters of the form `x...`, remove the dots
1597             $param =~ s/\.\.\.$//;
1598         }
1599         if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
1600             $parameterdescs{$param} = "variable arguments";
1601         }
1602     }
1603     elsif ($type eq "" && ($param eq "" or $param eq "void"))
1604     {
1605         $param="void";
1606         $parameterdescs{void} = "no arguments";
1607     }
1608     elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
1609     # handle unnamed (anonymous) union or struct:
1610     {
1611         $type = $param;
1612         $param = "{unnamed_" . $param . "}";
1613         $parameterdescs{$param} = "anonymous\n";
1614         $anon_struct_union = 1;
1615     }
1616     elsif ($param =~ "__cacheline_group" )
1617     # handle cache group enforcing variables: they do not need be described in header files
1618     {
1619         return; # ignore __cacheline_group_begin and __cacheline_group_end
1620     }
1621
1622     # warn if parameter has no description
1623     # (but ignore ones starting with # as these are not parameters
1624     # but inline preprocessor statements);
1625     # Note: It will also ignore void params and unnamed structs/unions
1626     if (!defined $parameterdescs{$param} && $param !~ /^#/) {
1627         $parameterdescs{$param} = $undescribed;
1628
1629         if (show_warnings($type, $declaration_name) && $param !~ /\./) {
1630             emit_warning("${file}:$.", "Function parameter or struct member '$param' not described in '$declaration_name'\n");
1631         }
1632     }
1633
1634     # strip spaces from $param so that it is one continuous string
1635     # on @parameterlist;
1636     # this fixes a problem where check_sections() cannot find
1637     # a parameter like "addr[6 + 2]" because it actually appears
1638     # as "addr[6", "+", "2]" on the parameter list;
1639     # but it's better to maintain the param string unchanged for output,
1640     # so just weaken the string compare in check_sections() to ignore
1641     # "[blah" in a parameter string;
1642     ###$param =~ s/\s*//g;
1643     push @parameterlist, $param;
1644     $org_arg =~ s/\s\s+/ /g;
1645     $parametertypes{$param} = $org_arg;
1646 }
1647
1648 sub check_sections($$$$$) {
1649     my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck) = @_;
1650     my @sects = split ' ', $sectcheck;
1651     my @prms = split ' ', $prmscheck;
1652     my $err;
1653     my ($px, $sx);
1654     my $prm_clean;        # strip trailing "[array size]" and/or beginning "*"
1655
1656     foreach $sx (0 .. $#sects) {
1657         $err = 1;
1658         foreach $px (0 .. $#prms) {
1659             $prm_clean = $prms[$px];
1660             $prm_clean =~ s/\[.*\]//;
1661             $prm_clean =~ s/$attribute//i;
1662             # ignore array size in a parameter string;
1663             # however, the original param string may contain
1664             # spaces, e.g.:  addr[6 + 2]
1665             # and this appears in @prms as "addr[6" since the
1666             # parameter list is split at spaces;
1667             # hence just ignore "[..." for the sections check;
1668             $prm_clean =~ s/\[.*//;
1669
1670             ##$prm_clean =~ s/^\**//;
1671             if ($prm_clean eq $sects[$sx]) {
1672                 $err = 0;
1673                 last;
1674             }
1675         }
1676         if ($err) {
1677             if ($decl_type eq "function") {
1678                 emit_warning("${file}:$.",
1679                     "Excess function parameter " .
1680                     "'$sects[$sx]' " .
1681                     "description in '$decl_name'\n");
1682             } elsif (($decl_type eq "struct") or
1683                           ($decl_type eq "union")) {
1684                 emit_warning("${file}:$.",
1685                     "Excess $decl_type member " .
1686                     "'$sects[$sx]' " .
1687                     "description in '$decl_name'\n");
1688             }
1689         }
1690     }
1691 }
1692
1693 ##
1694 # Checks the section describing the return value of a function.
1695 sub check_return_section {
1696     my $file = shift;
1697     my $declaration_name = shift;
1698     my $return_type = shift;
1699
1700     # Ignore an empty return type (It's a macro)
1701     # Ignore functions with a "void" return type. (But don't ignore "void *")
1702     if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
1703         return;
1704     }
1705
1706     if (!defined($sections{$section_return}) ||
1707         $sections{$section_return} eq "")
1708     {
1709         emit_warning("${file}:$.",
1710                      "No description found for return value of " .
1711                      "'$declaration_name'\n");
1712     }
1713 }
1714
1715 ##
1716 # takes a function prototype and the name of the current file being
1717 # processed and spits out all the details stored in the global
1718 # arrays/hashes.
1719 sub dump_function($$) {
1720     my $prototype = shift;
1721     my $file = shift;
1722     my $func_macro = 0;
1723
1724     print_lineno($new_start_line);
1725
1726     $prototype =~ s/^static +//;
1727     $prototype =~ s/^extern +//;
1728     $prototype =~ s/^asmlinkage +//;
1729     $prototype =~ s/^inline +//;
1730     $prototype =~ s/^__inline__ +//;
1731     $prototype =~ s/^__inline +//;
1732     $prototype =~ s/^__always_inline +//;
1733     $prototype =~ s/^noinline +//;
1734     $prototype =~ s/^__FORTIFY_INLINE +//;
1735     $prototype =~ s/__init +//;
1736     $prototype =~ s/__init_or_module +//;
1737     $prototype =~ s/__deprecated +//;
1738     $prototype =~ s/__flatten +//;
1739     $prototype =~ s/__meminit +//;
1740     $prototype =~ s/__must_check +//;
1741     $prototype =~ s/__weak +//;
1742     $prototype =~ s/__sched +//;
1743     $prototype =~ s/_noprof//;
1744     $prototype =~ s/__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +//;
1745     $prototype =~ s/__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +//;
1746     $prototype =~ s/__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +//;
1747     $prototype =~ s/DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)/$1, $2/;
1748     my $define = $prototype =~ s/^#\s*define\s+//; #ak added
1749     $prototype =~ s/__attribute_const__ +//;
1750     $prototype =~ s/__attribute__\s*\(\(
1751             (?:
1752                  [\w\s]++          # attribute name
1753                  (?:\([^)]*+\))?   # attribute arguments
1754                  \s*+,?            # optional comma at the end
1755             )+
1756           \)\)\s+//x;
1757
1758     # Yes, this truly is vile.  We are looking for:
1759     # 1. Return type (may be nothing if we're looking at a macro)
1760     # 2. Function name
1761     # 3. Function parameters.
1762     #
1763     # All the while we have to watch out for function pointer parameters
1764     # (which IIRC is what the two sections are for), C types (these
1765     # regexps don't even start to express all the possibilities), and
1766     # so on.
1767     #
1768     # If you mess with these regexps, it's a good idea to check that
1769     # the following functions' documentation still comes out right:
1770     # - parport_register_device (function pointer parameters)
1771     # - atomic_set (macro)
1772     # - pci_match_device, __copy_to_user (long return type)
1773     my $name = qr{[a-zA-Z0-9_~:]+};
1774     my $prototype_end1 = qr{[^\(]*};
1775     my $prototype_end2 = qr{[^\{]*};
1776     my $prototype_end = qr{\(($prototype_end1|$prototype_end2)\)};
1777     my $type1 = qr{[\w\s]+};
1778     my $type2 = qr{$type1\*+};
1779
1780     if ($define && $prototype =~ m/^()($name)\s+/) {
1781         # This is an object-like macro, it has no return type and no parameter
1782         # list.
1783         # Function-like macros are not allowed to have spaces between
1784         # declaration_name and opening parenthesis (notice the \s+).
1785         $return_type = $1;
1786         $declaration_name = $2;
1787         $func_macro = 1;
1788     } elsif ($prototype =~ m/^()($name)\s*$prototype_end/ ||
1789         $prototype =~ m/^($type1)\s+($name)\s*$prototype_end/ ||
1790         $prototype =~ m/^($type2+)\s*($name)\s*$prototype_end/)  {
1791         $return_type = $1;
1792         $declaration_name = $2;
1793         my $args = $3;
1794
1795         create_parameterlist($args, ',', $file, $declaration_name);
1796     } else {
1797         emit_warning("${file}:$.", "cannot understand function prototype: '$prototype'\n");
1798         return;
1799     }
1800
1801     if ($identifier ne $declaration_name) {
1802         emit_warning("${file}:$.", "expecting prototype for $identifier(). Prototype was for $declaration_name() instead\n");
1803         return;
1804     }
1805
1806     my $prms = join " ", @parameterlist;
1807     check_sections($file, $declaration_name, "function", $sectcheck, $prms);
1808
1809     # This check emits a lot of warnings at the moment, because many
1810     # functions don't have a 'Return' doc section. So until the number
1811     # of warnings goes sufficiently down, the check is only performed in
1812     # -Wreturn mode.
1813     # TODO: always perform the check.
1814     if ($Wreturn && !$func_macro) {
1815         check_return_section($file, $declaration_name, $return_type);
1816     }
1817
1818     # The function parser can be called with a typedef parameter.
1819     # Handle it.
1820     if ($return_type =~ /typedef/) {
1821         output_declaration($declaration_name,
1822                            'function',
1823                            {'function' => $declaration_name,
1824                             'typedef' => 1,
1825                             'module' => $modulename,
1826                             'functiontype' => $return_type,
1827                             'parameterlist' => \@parameterlist,
1828                             'parameterdescs' => \%parameterdescs,
1829                             'parametertypes' => \%parametertypes,
1830                             'sectionlist' => \@sectionlist,
1831                             'sections' => \%sections,
1832                             'purpose' => $declaration_purpose,
1833                                                         'func_macro' => $func_macro
1834                            });
1835     } else {
1836         output_declaration($declaration_name,
1837                            'function',
1838                            {'function' => $declaration_name,
1839                             'module' => $modulename,
1840                             'functiontype' => $return_type,
1841                             'parameterlist' => \@parameterlist,
1842                             'parameterdescs' => \%parameterdescs,
1843                             'parametertypes' => \%parametertypes,
1844                             'sectionlist' => \@sectionlist,
1845                             'sections' => \%sections,
1846                             'purpose' => $declaration_purpose,
1847                                                         'func_macro' => $func_macro
1848                            });
1849     }
1850 }
1851
1852 sub reset_state {
1853     $function = "";
1854     %parameterdescs = ();
1855     %parametertypes = ();
1856     @parameterlist = ();
1857     %sections = ();
1858     @sectionlist = ();
1859     $sectcheck = "";
1860     $struct_actual = "";
1861     $prototype = "";
1862
1863     $state = STATE_NORMAL;
1864     $inline_doc_state = STATE_INLINE_NA;
1865 }
1866
1867 sub tracepoint_munge($) {
1868     my $file = shift;
1869     my $tracepointname = 0;
1870     my $tracepointargs = 0;
1871
1872     if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
1873         $tracepointname = $1;
1874     }
1875     if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
1876         $tracepointname = $1;
1877     }
1878     if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
1879         $tracepointname = $2;
1880     }
1881     $tracepointname =~ s/^\s+//; #strip leading whitespace
1882     if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
1883         $tracepointargs = $1;
1884     }
1885     if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
1886         emit_warning("${file}:$.", "Unrecognized tracepoint format: \n".
1887                  "$prototype\n");
1888     } else {
1889         $prototype = "static inline void trace_$tracepointname($tracepointargs)";
1890         $identifier = "trace_$identifier";
1891     }
1892 }
1893
1894 sub syscall_munge() {
1895     my $void = 0;
1896
1897     $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
1898 ##    if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
1899     if ($prototype =~ m/SYSCALL_DEFINE0/) {
1900         $void = 1;
1901 ##        $prototype = "long sys_$1(void)";
1902     }
1903
1904     $prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
1905     if ($prototype =~ m/long (sys_.*?),/) {
1906         $prototype =~ s/,/\(/;
1907     } elsif ($void) {
1908         $prototype =~ s/\)/\(void\)/;
1909     }
1910
1911     # now delete all of the odd-number commas in $prototype
1912     # so that arg types & arg names don't have a comma between them
1913     my $count = 0;
1914     my $len = length($prototype);
1915     if ($void) {
1916         $len = 0;    # skip the for-loop
1917     }
1918     for (my $ix = 0; $ix < $len; $ix++) {
1919         if (substr($prototype, $ix, 1) eq ',') {
1920             $count++;
1921             if ($count % 2 == 1) {
1922                 substr($prototype, $ix, 1) = ' ';
1923             }
1924         }
1925     }
1926 }
1927
1928 sub process_proto_function($$) {
1929     my $x = shift;
1930     my $file = shift;
1931
1932     $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1933
1934     if ($x =~ /^#/ && $x !~ /^#\s*define/) {
1935         # do nothing
1936     } elsif ($x =~ /([^\{]*)/) {
1937         $prototype .= $1;
1938     }
1939
1940     if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
1941         $prototype =~ s@/\*.*?\*/@@gos;        # strip comments.
1942         $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1943         $prototype =~ s@^\s+@@gos; # strip leading spaces
1944
1945         # Handle prototypes for function pointers like:
1946         # int (*pcs_config)(struct foo)
1947         $prototype =~ s@^(\S+\s+)\(\s*\*(\S+)\)@$1$2@gos;
1948
1949         if ($prototype =~ /SYSCALL_DEFINE/) {
1950             syscall_munge();
1951         }
1952         if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
1953             $prototype =~ /DEFINE_SINGLE_EVENT/)
1954         {
1955             tracepoint_munge($file);
1956         }
1957         dump_function($prototype, $file);
1958         reset_state();
1959     }
1960 }
1961
1962 sub process_proto_type($$) {
1963     my $x = shift;
1964     my $file = shift;
1965
1966     $x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1967     $x =~ s@^\s+@@gos; # strip leading spaces
1968     $x =~ s@\s+$@@gos; # strip trailing spaces
1969     $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1970
1971     if ($x =~ /^#/) {
1972         # To distinguish preprocessor directive from regular declaration later.
1973         $x .= ";";
1974     }
1975
1976     while (1) {
1977         if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
1978             if( length $prototype ) {
1979                 $prototype .= " "
1980             }
1981             $prototype .= $1 . $2;
1982             ($2 eq '{') && $brcount++;
1983             ($2 eq '}') && $brcount--;
1984             if (($2 eq ';') && ($brcount == 0)) {
1985                 dump_declaration($prototype, $file);
1986                 reset_state();
1987                 last;
1988             }
1989             $x = $3;
1990         } else {
1991             $prototype .= $x;
1992             last;
1993         }
1994     }
1995 }
1996
1997
1998 sub map_filename($) {
1999     my $file;
2000     my ($orig_file) = @_;
2001
2002     if (defined($ENV{'SRCTREE'})) {
2003         $file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
2004     } else {
2005         $file = $orig_file;
2006     }
2007
2008     if (defined($source_map{$file})) {
2009         $file = $source_map{$file};
2010     }
2011
2012     return $file;
2013 }
2014
2015 sub process_export_file($) {
2016     my ($orig_file) = @_;
2017     my $file = map_filename($orig_file);
2018
2019     if (!open(IN,"<$file")) {
2020         print STDERR "Error: Cannot open file $file\n";
2021         ++$errors;
2022         return;
2023     }
2024
2025     while (<IN>) {
2026         if (/$export_symbol/) {
2027             next if (defined($nosymbol_table{$2}));
2028             $function_table{$2} = 1;
2029         }
2030         if (/$export_symbol_ns/) {
2031             next if (defined($nosymbol_table{$2}));
2032             $function_table{$2} = 1;
2033         }
2034     }
2035
2036     close(IN);
2037 }
2038
2039 #
2040 # Parsers for the various processing states.
2041 #
2042 # STATE_NORMAL: looking for the /** to begin everything.
2043 #
2044 sub process_normal() {
2045     if (/$doc_start/o) {
2046         $state = STATE_NAME;        # next line is always the function name
2047         $in_doc_sect = 0;
2048         $declaration_start_line = $. + 1;
2049     }
2050 }
2051
2052 #
2053 # STATE_NAME: Looking for the "name - description" line
2054 #
2055 sub process_name($$) {
2056     my $file = shift;
2057     my $descr;
2058
2059     if (/$doc_block/o) {
2060         $state = STATE_DOCBLOCK;
2061         $contents = "";
2062         $new_start_line = $.;
2063
2064         if ( $1 eq "" ) {
2065             $section = $section_intro;
2066         } else {
2067             $section = $1;
2068         }
2069     } elsif (/$doc_decl/o) {
2070         $identifier = $1;
2071         my $is_kernel_comment = 0;
2072         my $decl_start = qr{$doc_com};
2073         # test for pointer declaration type, foo * bar() - desc
2074         my $fn_type = qr{\w+\s*\*\s*};
2075         my $parenthesis = qr{\(\w*\)};
2076         my $decl_end = qr{[-:].*};
2077         if (/^$decl_start([\w\s]+?)$parenthesis?\s*$decl_end?$/) {
2078             $identifier = $1;
2079         }
2080         if ($identifier =~ m/^(struct|union|enum|typedef)\b\s*(\S*)/) {
2081             $decl_type = $1;
2082             $identifier = $2;
2083             $is_kernel_comment = 1;
2084         }
2085         # Look for foo() or static void foo() - description; or misspelt
2086         # identifier
2087         elsif (/^$decl_start$fn_type?(\w+)\s*$parenthesis?\s*$decl_end?$/ ||
2088             /^$decl_start$fn_type?(\w+.*)$parenthesis?\s*$decl_end$/) {
2089             $identifier = $1;
2090             $decl_type = 'function';
2091             $identifier =~ s/^define\s+//;
2092             $is_kernel_comment = 1;
2093         }
2094         $identifier =~ s/\s+$//;
2095
2096         $state = STATE_BODY;
2097         # if there's no @param blocks need to set up default section
2098         # here
2099         $contents = "";
2100         $section = $section_default;
2101         $new_start_line = $. + 1;
2102         if (/[-:](.*)/) {
2103             # strip leading/trailing/multiple spaces
2104             $descr= $1;
2105             $descr =~ s/^\s*//;
2106             $descr =~ s/\s*$//;
2107             $descr =~ s/\s+/ /g;
2108             $declaration_purpose = $descr;
2109             $state = STATE_BODY_MAYBE;
2110         } else {
2111             $declaration_purpose = "";
2112         }
2113
2114         if (!$is_kernel_comment) {
2115             emit_warning("${file}:$.", "This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst\n$_");
2116             $state = STATE_NORMAL;
2117         }
2118
2119         if (($declaration_purpose eq "") && $Wshort_desc) {
2120             emit_warning("${file}:$.", "missing initial short description on line:\n$_");
2121         }
2122
2123         if ($identifier eq "" && $decl_type ne "enum") {
2124             emit_warning("${file}:$.", "wrong kernel-doc identifier on line:\n$_");
2125             $state = STATE_NORMAL;
2126         }
2127
2128         if ($verbose) {
2129             print STDERR "${file}:$.: info: Scanning doc for $decl_type $identifier\n";
2130         }
2131     } else {
2132         emit_warning("${file}:$.", "Cannot understand $_ on line $. - I thought it was a doc line\n");
2133         $state = STATE_NORMAL;
2134     }
2135 }
2136
2137
2138 #
2139 # STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
2140 #
2141 sub process_body($$) {
2142     my $file = shift;
2143
2144     if ($state == STATE_BODY_WITH_BLANK_LINE && /^\s*\*\s?\S/) {
2145         dump_section($file, $section, $contents);
2146         $section = $section_default;
2147         $new_start_line = $.;
2148         $contents = "";
2149     }
2150
2151     if (/$doc_sect/i) { # case insensitive for supported section names
2152         $in_doc_sect = 1;
2153         $newsection = $1;
2154         $newcontents = $2;
2155
2156         # map the supported section names to the canonical names
2157         if ($newsection =~ m/^description$/i) {
2158             $newsection = $section_default;
2159         } elsif ($newsection =~ m/^context$/i) {
2160             $newsection = $section_context;
2161         } elsif ($newsection =~ m/^returns?$/i) {
2162             $newsection = $section_return;
2163         } elsif ($newsection =~ m/^\@return$/) {
2164             # special: @return is a section, not a param description
2165             $newsection = $section_return;
2166         }
2167
2168         if (($contents ne "") && ($contents ne "\n")) {
2169             if (!$in_doc_sect && $Wcontents_before_sections) {
2170                 emit_warning("${file}:$.", "contents before sections\n");
2171             }
2172             dump_section($file, $section, $contents);
2173             $section = $section_default;
2174         }
2175
2176         $in_doc_sect = 1;
2177         $state = STATE_BODY;
2178         $contents = $newcontents;
2179         $new_start_line = $.;
2180         while (substr($contents, 0, 1) eq " ") {
2181             $contents = substr($contents, 1);
2182         }
2183         if ($contents ne "") {
2184             $contents .= "\n";
2185         }
2186         $section = $newsection;
2187         $leading_space = undef;
2188     } elsif (/$doc_end/) {
2189         if (($contents ne "") && ($contents ne "\n")) {
2190             dump_section($file, $section, $contents);
2191             $section = $section_default;
2192             $contents = "";
2193         }
2194         # look for doc_com + <text> + doc_end:
2195         if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
2196             emit_warning("${file}:$.", "suspicious ending line: $_");
2197         }
2198
2199         $prototype = "";
2200         $state = STATE_PROTO;
2201         $brcount = 0;
2202         $new_start_line = $. + 1;
2203     } elsif (/$doc_content/) {
2204         if ($1 eq "") {
2205             if ($section eq $section_context) {
2206                 dump_section($file, $section, $contents);
2207                 $section = $section_default;
2208                 $contents = "";
2209                 $new_start_line = $.;
2210                 $state = STATE_BODY;
2211             } else {
2212                 if ($section ne $section_default) {
2213                     $state = STATE_BODY_WITH_BLANK_LINE;
2214                 } else {
2215                     $state = STATE_BODY;
2216                 }
2217                 $contents .= "\n";
2218             }
2219         } elsif ($state == STATE_BODY_MAYBE) {
2220             # Continued declaration purpose
2221             chomp($declaration_purpose);
2222             $declaration_purpose .= " " . $1;
2223             $declaration_purpose =~ s/\s+/ /g;
2224         } else {
2225             my $cont = $1;
2226             if ($section =~ m/^@/ || $section eq $section_context) {
2227                 if (!defined $leading_space) {
2228                     if ($cont =~ m/^(\s+)/) {
2229                         $leading_space = $1;
2230                     } else {
2231                         $leading_space = "";
2232                     }
2233                 }
2234                 $cont =~ s/^$leading_space//;
2235             }
2236             $contents .= $cont . "\n";
2237         }
2238     } else {
2239         # i dont know - bad line?  ignore.
2240         emit_warning("${file}:$.", "bad line: $_");
2241     }
2242 }
2243
2244
2245 #
2246 # STATE_PROTO: reading a function/whatever prototype.
2247 #
2248 sub process_proto($$) {
2249     my $file = shift;
2250
2251     if (/$doc_inline_oneline/) {
2252         $section = $1;
2253         $contents = $2;
2254         if ($contents ne "") {
2255             $contents .= "\n";
2256             dump_section($file, $section, $contents);
2257             $section = $section_default;
2258             $contents = "";
2259         }
2260     } elsif (/$doc_inline_start/) {
2261         $state = STATE_INLINE;
2262         $inline_doc_state = STATE_INLINE_NAME;
2263     } elsif ($decl_type eq 'function') {
2264         process_proto_function($_, $file);
2265     } else {
2266         process_proto_type($_, $file);
2267     }
2268 }
2269
2270 #
2271 # STATE_DOCBLOCK: within a DOC: block.
2272 #
2273 sub process_docblock($$) {
2274     my $file = shift;
2275
2276     if (/$doc_end/) {
2277         dump_doc_section($file, $section, $contents);
2278         $section = $section_default;
2279         $contents = "";
2280         $function = "";
2281         %parameterdescs = ();
2282         %parametertypes = ();
2283         @parameterlist = ();
2284         %sections = ();
2285         @sectionlist = ();
2286         $prototype = "";
2287         $state = STATE_NORMAL;
2288     } elsif (/$doc_content/) {
2289         if ( $1 eq "" )        {
2290             $contents .= $blankline;
2291         } else {
2292             $contents .= $1 . "\n";
2293         }
2294     }
2295 }
2296
2297 #
2298 # STATE_INLINE: docbook comments within a prototype.
2299 #
2300 sub process_inline($$) {
2301     my $file = shift;
2302
2303     # First line (state 1) needs to be a @parameter
2304     if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
2305         $section = $1;
2306         $contents = $2;
2307         $new_start_line = $.;
2308         if ($contents ne "") {
2309             while (substr($contents, 0, 1) eq " ") {
2310                 $contents = substr($contents, 1);
2311             }
2312             $contents .= "\n";
2313         }
2314         $inline_doc_state = STATE_INLINE_TEXT;
2315         # Documentation block end */
2316     } elsif (/$doc_inline_end/) {
2317         if (($contents ne "") && ($contents ne "\n")) {
2318             dump_section($file, $section, $contents);
2319             $section = $section_default;
2320             $contents = "";
2321         }
2322         $state = STATE_PROTO;
2323         $inline_doc_state = STATE_INLINE_NA;
2324         # Regular text
2325     } elsif (/$doc_content/) {
2326         if ($inline_doc_state == STATE_INLINE_TEXT) {
2327             $contents .= $1 . "\n";
2328             # nuke leading blank lines
2329             if ($contents =~ /^\s*$/) {
2330                 $contents = "";
2331             }
2332         } elsif ($inline_doc_state == STATE_INLINE_NAME) {
2333             $inline_doc_state = STATE_INLINE_ERROR;
2334             emit_warning("${file}:$.", "Incorrect use of kernel-doc format: $_");
2335         }
2336     }
2337 }
2338
2339
2340 sub process_file($) {
2341     my $file;
2342     my ($orig_file) = @_;
2343
2344     $file = map_filename($orig_file);
2345
2346     if (!open(IN_FILE,"<$file")) {
2347         print STDERR "Error: Cannot open file $file\n";
2348         ++$errors;
2349         return;
2350     }
2351
2352     $. = 1;
2353
2354     $section_counter = 0;
2355     while (<IN_FILE>) {
2356         while (!/^ \*/ && s/\\\s*$//) {
2357             $_ .= <IN_FILE>;
2358         }
2359         # Replace tabs by spaces
2360         while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
2361         # Hand this line to the appropriate state handler
2362         if ($state == STATE_NORMAL) {
2363             process_normal();
2364         } elsif ($state == STATE_NAME) {
2365             process_name($file, $_);
2366         } elsif ($state == STATE_BODY || $state == STATE_BODY_MAYBE ||
2367                  $state == STATE_BODY_WITH_BLANK_LINE) {
2368             process_body($file, $_);
2369         } elsif ($state == STATE_INLINE) { # scanning for inline parameters
2370             process_inline($file, $_);
2371         } elsif ($state == STATE_PROTO) {
2372             process_proto($file, $_);
2373         } elsif ($state == STATE_DOCBLOCK) {
2374             process_docblock($file, $_);
2375         }
2376     }
2377
2378     # Make sure we got something interesting.
2379     if (!$section_counter && $output_mode ne "none") {
2380         if ($output_selection == OUTPUT_INCLUDE) {
2381             emit_warning("${file}:1", "'$_' not found\n")
2382                 for keys %function_table;
2383         } else {
2384             emit_warning("${file}:1", "no structured comments found\n");
2385         }
2386     }
2387     close IN_FILE;
2388 }
2389
2390
2391 if ($output_mode eq "rst") {
2392     get_sphinx_version() if (!$sphinx_major);
2393 }
2394
2395 $kernelversion = get_kernel_version();
2396
2397 # generate a sequence of code that will splice in highlighting information
2398 # using the s// operator.
2399 for (my $k = 0; $k < @highlights; $k++) {
2400     my $pattern = $highlights[$k][0];
2401     my $result = $highlights[$k][1];
2402 #   print STDERR "scanning pattern:$pattern, highlight:($result)\n";
2403     $dohighlight .=  "\$contents =~ s:$pattern:$result:gs;\n";
2404 }
2405
2406 # Read the file that maps relative names to absolute names for
2407 # separate source and object directories and for shadow trees.
2408 if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
2409     my ($relname, $absname);
2410     while(<SOURCE_MAP>) {
2411         chop();
2412         ($relname, $absname) = (split())[0..1];
2413         $relname =~ s:^/+::;
2414         $source_map{$relname} = $absname;
2415     }
2416     close(SOURCE_MAP);
2417 }
2418
2419 if ($output_selection == OUTPUT_EXPORTED ||
2420     $output_selection == OUTPUT_INTERNAL) {
2421
2422     push(@export_file_list, @ARGV);
2423
2424     foreach (@export_file_list) {
2425         chomp;
2426         process_export_file($_);
2427     }
2428 }
2429
2430 foreach (@ARGV) {
2431     chomp;
2432     process_file($_);
2433 }
2434 if ($verbose && $errors) {
2435     print STDERR "$errors errors\n";
2436 }
2437 if ($verbose && $warnings) {
2438     print STDERR "$warnings warnings\n";
2439 }
2440
2441 if ($Werror && $warnings) {
2442     print STDERR "$warnings warnings as Errors\n";
2443     exit($warnings);
2444 } else {
2445     exit($output_mode eq "none" ? 0 : $errors)
2446 }
2447
2448 __END__
2449
2450 =head1 OPTIONS
2451
2452 =head2 Output format selection (mutually exclusive):
2453
2454 =over 8
2455
2456 =item -man
2457
2458 Output troff manual page format.
2459
2460 =item -rst
2461
2462 Output reStructuredText format. This is the default.
2463
2464 =item -none
2465
2466 Do not output documentation, only warnings.
2467
2468 =back
2469
2470 =head2 Output format modifiers
2471
2472 =head3 reStructuredText only
2473
2474 =over 8
2475
2476 =item -sphinx-version VERSION
2477
2478 Use the ReST C domain dialect compatible with a specific Sphinx Version.
2479
2480 If not specified, kernel-doc will auto-detect using the sphinx-build version
2481 found on PATH.
2482
2483 =back
2484
2485 =head2 Output selection (mutually exclusive):
2486
2487 =over 8
2488
2489 =item -export
2490
2491 Only output documentation for the symbols that have been exported using
2492 EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
2493
2494 =item -internal
2495
2496 Only output documentation for the symbols that have NOT been exported using
2497 EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
2498
2499 =item -function NAME
2500
2501 Only output documentation for the given function or DOC: section title.
2502 All other functions and DOC: sections are ignored.
2503
2504 May be specified multiple times.
2505
2506 =item -nosymbol NAME
2507
2508 Exclude the specified symbol from the output documentation.
2509
2510 May be specified multiple times.
2511
2512 =back
2513
2514 =head2 Output selection modifiers:
2515
2516 =over 8
2517
2518 =item -no-doc-sections
2519
2520 Do not output DOC: sections.
2521
2522 =item -export-file FILE
2523
2524 Specify an additional FILE in which to look for EXPORT_SYMBOL information.
2525
2526 To be used with -export or -internal.
2527
2528 May be specified multiple times.
2529
2530 =back
2531
2532 =head3 reStructuredText only
2533
2534 =over 8
2535
2536 =item -enable-lineno
2537
2538 Enable output of .. LINENO lines.
2539
2540 =back
2541
2542 =head2 Other parameters:
2543
2544 =over 8
2545
2546 =item -h, -help
2547
2548 Print this help.
2549
2550 =item -v
2551
2552 Verbose output, more warnings and other information.
2553
2554 =item -Werror
2555
2556 Treat warnings as errors.
2557
2558 =back
2559
2560 =cut