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