2 # SPDX-License-Identifier: GPL-2.0
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 ##
13 ## #define enhancements by Armin Kuster <akuster@mvista.com> ##
14 ## Copyright (c) 2000 MontaVista Software, Inc. ##
16 # Copyright (C) 2022 Tomasz Warniełło (POD)
18 use Pod::Usage qw/pod2usage/;
22 kernel-doc - Print formatted kernel documentation to stdout
26 kernel-doc [-h] [-v] [-Werror]
28 -rst [-sphinx-version VERSION] [-enable-lineno] |
34 [-function NAME] ... |
38 [-export-file FILE] ...
41 Run `kernel-doc -h` for details.
45 Read C language source or header FILEs, extract embedded documentation comments,
46 and print formatted documentation to standard output.
48 The documentation comments are identified by the "/**" opening comment mark.
50 See Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
54 # more perldoc at the end of the file
60 my $anon_struct_union = 0;
62 # match expressions used to find embedded type information
63 my $type_constant = '\b``([^\`]+)``\b';
64 my $type_constant2 = '\%([-_\w]+)';
65 my $type_func = '(\w+)\(\)';
66 my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
67 my $type_param_ref = '([\!]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
68 my $type_fp_param = '\@(\w+)\(\)'; # Special RST handling for func ptr params
69 my $type_fp_param2 = '\@(\w+->\S+)\(\)'; # Special RST handling for structs with func ptr params
70 my $type_env = '(\$\w+)';
71 my $type_enum = '\&(enum\s*([_\w]+))';
72 my $type_struct = '\&(struct\s*([_\w]+))';
73 my $type_typedef = '\&(typedef\s*([_\w]+))';
74 my $type_union = '\&(union\s*([_\w]+))';
75 my $type_member = '\&([_\w]+)(\.|->)([_\w]+)';
76 my $type_fallback = '\&([_\w]+)';
77 my $type_member_func = $type_member . '\(\)';
79 # Output conversion substitutions.
80 # One for each output format
82 # these are pretty rough
83 my @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"]
96 my $blankline_man = "";
99 my @highlights_rst = (
100 [$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**"]
116 my $blankline_rst = "\n";
121 -message => "No arguments!\n",
124 -sections => 'SYNOPSIS',
130 my ($sphinx_major, $sphinx_minor, $sphinx_patch);
132 my $dohighlight = "";
136 my $output_mode = "rst";
137 my $output_preformatted = 0;
138 my $no_doc_sections = 0;
139 my $enable_lineno = 0;
140 my @highlights = @highlights_rst;
141 my $blankline = $blankline_rst;
142 my $modulename = "Kernel API";
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
150 my $output_selection = OUTPUT_ALL;
151 my $show_not_found = 0; # No longer used
153 my @export_file_list;
156 if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
157 (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
158 @build_time = gmtime($seconds);
160 @build_time = localtime;
163 my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
164 'July', 'August', 'September', 'October',
165 'November', 'December')[$build_time[4]] .
166 " " . ($build_time[5]+1900);
168 # Essentially these are globals.
169 # They probably want to be tidied up, made more localised or something.
170 # CAVEAT EMPTOR! Some of the others I localised may not want to be, which
171 # could cause "use of undefined value" or other bugs.
172 my ($function, %function_table, %parametertypes, $declaration_purpose);
173 my %nosymbol_table = ();
174 my $declaration_start_line;
175 my ($type, $declaration_name, $return_type);
176 my ($newsection, $newcontents, $prototype, $brcount, %source_map);
178 if (defined($ENV{'KBUILD_VERBOSE'}) && $ENV{'KBUILD_VERBOSE'} =~ '1') {
182 if (defined($ENV{'KCFLAGS'})) {
183 my $kcflags = "$ENV{'KCFLAGS'}";
185 if ($kcflags =~ /Werror/) {
190 if (defined($ENV{'KDOC_WERROR'})) {
191 $Werror = "$ENV{'KDOC_WERROR'}";
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
200 my $section_counter = 0;
206 STATE_NORMAL => 0, # normal code
207 STATE_NAME => 1, # looking for function name
208 STATE_BODY_MAYBE => 2, # body - or maybe more description
209 STATE_BODY => 3, # the body of the comment
210 STATE_BODY_WITH_BLANK_LINE => 4, # the body, which has a blank line
211 STATE_PROTO => 5, # scanning prototype
212 STATE_DOCBLOCK => 6, # documentation block
213 STATE_INLINE => 7, # gathering doc outside main block
219 # Inline documentation state
221 STATE_INLINE_NA => 0, # not applicable ($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.
229 my $inline_doc_state;
231 #declaration types: can be
232 # 'function', 'struct', 'union', 'enum', 'typedef'
235 # Name of the kernel-doc identifier for non-DOC markups
238 my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
240 my $doc_com = '\s*\*\s*';
241 my $doc_com_body = '\s*\* ?';
242 my $doc_decl = $doc_com . '(\w+)';
243 # @params and a strictly limited set of supported section names
248 # while trying to not match literal block starts like "example::"
250 my $doc_sect = $doc_com .
251 '\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:([^:].*)?$';
252 my $doc_content = $doc_com_body . '(.*)';
253 my $doc_block = $doc_com . 'DOC:\s*(.*)?';
254 my $doc_inline_start = '^\s*/\*\*\s*$';
255 my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
256 my $doc_inline_end = '^\s*\*/\s*$';
257 my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
258 my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
259 my $export_symbol_ns = '^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*\w+\)\s*;';
260 my $function_pointer = qr{([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)};
261 my $attribute = qr{__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)}i;
264 my %parameterdesc_start_lines;
268 my %section_start_lines;
273 my $new_start_line = 0;
275 # the canonical section names. see also $doc_sect above.
276 my $section_default = "Description"; # default section
277 my $section_intro = "Introduction";
278 my $section = $section_default;
279 my $section_context = "Context";
280 my $section_return = "Return";
282 my $undescribed = "-- undescribed --";
286 while ($ARGV[0] =~ m/^--?(.*)/) {
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") {
319 } elsif ($cmd eq "Werror") {
321 } elsif (($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') {
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+)?/) {
334 $sphinx_minor = substr($2,1);
339 $sphinx_patch = substr($3,1)
344 die "Sphinx version should either major.minor or major.minor.patch format\n";
349 -message => "Argument unknown!\n",
352 -sections => 'SYNOPSIS',
358 -message => "FILE argument missing\n",
361 -sections => 'SYNOPSIS',
367 # continue execution near EOF;
369 # The C domain dialect changed on Sphinx 3. So, we need to check the
370 # version in order to produce the right tags.
373 foreach(split(/:/, $ENV{PATH})) {
374 return "$_/$_[0]" if(-x "$_/$_[0]");
378 sub get_sphinx_version()
382 my $cmd = "sphinx-build";
383 if (!findprog($cmd)) {
384 my $cmd = "sphinx-build3";
385 if (!findprog($cmd)) {
389 printf STDERR "Warning: Sphinx version not found. Using default (Sphinx version %d.%d.%d)\n",
390 $sphinx_major, $sphinx_minor, $sphinx_patch;
395 open IN, "$cmd --version 2>&1 |";
397 if (m/^\s*sphinx-build\s+([\d]+)\.([\d\.]+)(\+\/[\da-f]+)?$/) {
403 # Sphinx 1.2.x uses a different format
404 if (m/^\s*Sphinx.*\s+([\d]+)\.([\d\.]+)$/) {
414 # get kernel version from env
415 sub get_kernel_version() {
416 my $version = 'unknown kernel version';
418 if (defined($ENV{'KERNELVERSION'})) {
419 $version = $ENV{'KERNELVERSION'};
427 if ($enable_lineno && defined($lineno)) {
428 print ".. LINENO " . $lineno . "\n";
433 my $location = shift;
435 print STDERR "$location: warning: $msg";
439 # dumps section contents to arrays/hashes intended for that purpose.
444 my $contents = join "\n", @_;
446 if ($name =~ m/$type_param/) {
448 $parameterdescs{$name} = $contents;
449 $sectcheck = $sectcheck . $name . " ";
450 $parameterdesc_start_lines{$name} = $new_start_line;
452 } elsif ($name eq "@\.\.\.") {
454 $parameterdescs{$name} = $contents;
455 $sectcheck = $sectcheck . $name . " ";
456 $parameterdesc_start_lines{$name} = $new_start_line;
459 if (defined($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");
464 $sections{$name} .= $contents;
466 $sections{$name} = $contents;
467 push @sectionlist, $name;
468 $section_start_lines{$name} = $new_start_line;
475 # dump DOC: section after checking that it should go out
477 sub dump_doc_section {
480 my $contents = join "\n", @_;
482 if ($no_doc_sections) {
486 return if (defined($nosymbol_table{$name}));
488 if (($output_selection == OUTPUT_ALL) ||
489 (($output_selection == OUTPUT_INCLUDE) &&
490 defined($function_table{$name})))
492 dump_section($file, $name, $contents);
493 output_blockhead({'sectionlist' => \@sectionlist,
494 'sections' => \%sections,
495 'module' => $modulename,
496 'content-only' => ($output_selection != OUTPUT_ALL), });
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
511 sub output_highlight {
512 my $contents = join "\n",@_;
516 # if (!defined $contents) {
518 # confess "output_highlight got called with no args?\n";
521 # print STDERR "contents b4:$contents\n";
524 # print STDERR "contents af:$contents\n";
526 foreach $line (split "\n", $contents) {
527 if (! $output_preformatted) {
531 if (! $output_preformatted) {
532 print $lineprefix, $blankline;
535 if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
538 print $lineprefix, $line;
546 # output function in man
547 sub output_function_man(%) {
549 my ($parameter, $section);
552 print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
555 print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
557 print ".SH SYNOPSIS\n";
558 if ($args{'functiontype'} ne "") {
559 print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
561 print ".B \"" . $args{'function'} . "\n";
566 foreach my $parameter (@{$args{'parameterlist'}}) {
567 if ($count == $#{$args{'parameterlist'}}) {
570 $type = $args{'parametertypes'}{$parameter};
571 if ($type =~ m/$function_pointer/) {
572 # pointer-to-function
573 print ".BI \"" . $parenth . $1 . "\" " . " \") (" . $2 . ")" . $post . "\"\n";
575 $type =~ s/([^\*])$/$1 /;
576 print ".BI \"" . $parenth . $type . "\" " . " \"" . $post . "\"\n";
582 print ".SH ARGUMENTS\n";
583 foreach $parameter (@{$args{'parameterlist'}}) {
584 my $parameter_name = $parameter;
585 $parameter_name =~ s/\[.*//;
587 print ".IP \"" . $parameter . "\" 12\n";
588 output_highlight($args{'parameterdescs'}{$parameter_name});
590 foreach $section (@{$args{'sectionlist'}}) {
591 print ".SH \"", uc $section, "\"\n";
592 output_highlight($args{'sections'}{$section});
598 sub output_enum_man(%) {
600 my ($parameter, $section);
603 print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
606 print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
608 print ".SH SYNOPSIS\n";
609 print "enum " . $args{'enum'} . " {\n";
611 foreach my $parameter (@{$args{'parameterlist'}}) {
612 print ".br\n.BI \" $parameter\"\n";
613 if ($count == $#{$args{'parameterlist'}}) {
623 print ".SH Constants\n";
624 foreach $parameter (@{$args{'parameterlist'}}) {
625 my $parameter_name = $parameter;
626 $parameter_name =~ s/\[.*//;
628 print ".IP \"" . $parameter . "\" 12\n";
629 output_highlight($args{'parameterdescs'}{$parameter_name});
631 foreach $section (@{$args{'sectionlist'}}) {
632 print ".SH \"$section\"\n";
633 output_highlight($args{'sections'}{$section});
638 # output struct in man
639 sub output_struct_man(%) {
641 my ($parameter, $section);
643 print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
646 print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
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";
655 print ".SH Members\n";
656 foreach $parameter (@{$args{'parameterlist'}}) {
657 ($parameter =~ /^#/) && next;
659 my $parameter_name = $parameter;
660 $parameter_name =~ s/\[.*//;
662 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
663 print ".IP \"" . $parameter . "\" 12\n";
664 output_highlight($args{'parameterdescs'}{$parameter_name});
666 foreach $section (@{$args{'sectionlist'}}) {
667 print ".SH \"$section\"\n";
668 output_highlight($args{'sections'}{$section});
673 # output typedef in man
674 sub output_typedef_man(%) {
676 my ($parameter, $section);
678 print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
681 print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
683 foreach $section (@{$args{'sectionlist'}}) {
684 print ".SH \"$section\"\n";
685 output_highlight($args{'sections'}{$section});
689 sub output_blockhead_man(%) {
691 my ($parameter, $section);
694 print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
696 foreach $section (@{$args{'sectionlist'}}) {
697 print ".SH \"$section\"\n";
698 output_highlight($args{'sections'}{$section});
703 # output in restructured text
707 # This could use some work; it's used to output the DOC: sections, and
708 # starts by putting out the name of the doc section itself, but that tends
709 # to duplicate a header already in the template file.
711 sub output_blockhead_rst(%) {
713 my ($parameter, $section);
715 foreach $section (@{$args{'sectionlist'}}) {
716 next if (defined($nosymbol_table{$section}));
718 if ($output_selection != OUTPUT_INCLUDE) {
719 print ".. _$section:\n\n";
720 print "**$section**\n\n";
722 print_lineno($section_start_lines{$section});
723 output_highlight_rst($args{'sections'}{$section});
729 # Apply the RST highlights to a sub-block of text.
731 sub highlight_block($) {
732 # The dohighlight kludge requires the text be called $contents
733 my $contents = shift;
740 # Regexes used only here.
742 my $sphinx_literal = '^[^.].*::$';
743 my $sphinx_cblock = '^\.\.\ +code-block::';
745 sub output_highlight_rst {
746 my $input = join "\n",@_;
753 foreach $line (split "\n",$input) {
755 # If we're in a literal block, see if we should drop out
756 # of it. Otherwise pass the line straight through unmunged.
759 if (! ($line =~ /^\s*$/)) {
761 # If this is the first non-blank line in a literal
762 # block we need to figure out what the proper indent is.
764 if ($litprefix eq "") {
766 $litprefix = '^' . $1;
767 $output .= $line . "\n";
768 } elsif (! ($line =~ /$litprefix/)) {
771 $output .= $line . "\n";
774 $output .= $line . "\n";
778 # Not in a literal block (or just dropped out)
781 $block .= $line . "\n";
782 if (($line =~ /$sphinx_literal/) || ($line =~ /$sphinx_cblock/)) {
785 $output .= highlight_block($block);
792 $output .= highlight_block($block);
794 foreach $line (split "\n", $output) {
795 print $lineprefix . $line . "\n";
799 sub output_function_rst(%) {
801 my ($parameter, $section);
802 my $oldprefix = $lineprefix;
806 if ($sphinx_major < 3) {
807 if ($args{'typedef'}) {
808 print ".. c:type:: ". $args{'function'} . "\n\n";
809 print_lineno($declaration_start_line);
810 print " **Typedef**: ";
812 output_highlight_rst($args{'purpose'});
813 $start = "\n\n**Syntax**\n\n ``";
816 print ".. c:function:: ";
819 if ($args{'typedef'} || $args{'functiontype'} eq "") {
821 print ".. c:macro:: ". $args{'function'} . "\n\n";
823 print ".. c:function:: ";
826 if ($args{'typedef'}) {
827 print_lineno($declaration_start_line);
828 print " **Typedef**: ";
830 output_highlight_rst($args{'purpose'});
831 $start = "\n\n**Syntax**\n\n ``";
833 print "``" if ($is_macro);
836 if ($args{'functiontype'} ne "") {
837 $start .= $args{'functiontype'} . " " . $args{'function'} . " (";
839 $start .= $args{'function'} . " (";
844 foreach my $parameter (@{$args{'parameterlist'}}) {
849 $type = $args{'parametertypes'}{$parameter};
851 if ($type =~ m/$function_pointer/) {
852 # pointer-to-function
853 print $1 . $parameter . ") (" . $2 . ")";
863 if (!$args{'typedef'}) {
864 print_lineno($declaration_start_line);
866 output_highlight_rst($args{'purpose'});
871 # Put our descriptive text into a container (thus an HTML <div>) to help
872 # set the function prototypes apart.
874 print ".. container:: kernelindent\n\n";
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};
883 print $lineprefix . "``$type``\n";
885 print $lineprefix . "``$parameter``\n";
888 print_lineno($parameterdesc_start_lines{$parameter_name});
891 if (defined($args{'parameterdescs'}{$parameter_name}) &&
892 $args{'parameterdescs'}{$parameter_name} ne $undescribed) {
893 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
895 print $lineprefix . "*undescribed*\n";
901 output_section_rst(@_);
902 $lineprefix = $oldprefix;
905 sub output_section_rst(%) {
908 my $oldprefix = $lineprefix;
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});
919 sub output_enum_rst(%) {
922 my $oldprefix = $lineprefix;
926 if ($sphinx_major < 3) {
927 my $name = "enum " . $args{'enum'};
928 print "\n\n.. c:type:: " . $name . "\n\n";
930 my $name = $args{'enum'};
931 print "\n\n.. c:enum:: " . $name . "\n\n";
933 print_lineno($declaration_start_line);
935 output_highlight_rst($args{'purpose'});
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";
945 if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
946 output_highlight_rst($args{'parameterdescs'}{$parameter});
948 print $lineprefix . "*undescribed*\n";
953 $lineprefix = $oldprefix;
954 output_section_rst(@_);
957 sub output_typedef_rst(%) {
960 my $oldprefix = $lineprefix;
963 if ($sphinx_major < 3) {
964 $name = "typedef " . $args{'typedef'};
966 $name = $args{'typedef'};
968 print "\n\n.. c:type:: " . $name . "\n\n";
969 print_lineno($declaration_start_line);
971 output_highlight_rst($args{'purpose'});
974 $lineprefix = $oldprefix;
975 output_section_rst(@_);
978 sub output_struct_rst(%) {
981 my $oldprefix = $lineprefix;
983 if ($sphinx_major < 3) {
984 my $name = $args{'type'} . " " . $args{'struct'};
985 print "\n\n.. c:type:: " . $name . "\n\n";
987 my $name = $args{'struct'};
988 if ($args{'type'} eq 'union') {
989 print "\n\n.. c:union:: " . $name . "\n\n";
991 print "\n\n.. c:struct:: " . $name . "\n\n";
994 print_lineno($declaration_start_line);
996 output_highlight_rst($args{'purpose'});
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";
1007 print $lineprefix . "**Members**\n\n";
1008 foreach $parameter (@{$args{'parameterlist'}}) {
1009 ($parameter =~ /^#/) && next;
1011 my $parameter_name = $parameter;
1012 $parameter_name =~ s/\[.*//;
1014 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
1015 $type = $args{'parametertypes'}{$parameter};
1016 print_lineno($parameterdesc_start_lines{$parameter_name});
1017 print $lineprefix . "``" . $parameter . "``\n";
1019 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
1025 $lineprefix = $oldprefix;
1026 output_section_rst(@_);
1029 ## none mode output functions
1031 sub output_function_none(%) {
1034 sub output_enum_none(%) {
1037 sub output_typedef_none(%) {
1040 sub output_struct_none(%) {
1043 sub output_blockhead_none(%) {
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
1050 sub output_declaration {
1053 my $functype = shift;
1054 my $func = "output_${functype}_$output_mode";
1056 return if (defined($nosymbol_table{$name}));
1058 if (($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}))))
1071 # generic output function - calls the right one based on current output mode.
1072 sub output_blockhead {
1074 my $func = "output_blockhead_" . $output_mode;
1080 # takes a declaration (struct, union, enum, typedef) and
1081 # invokes the right handler. NOT called for functions.
1082 sub dump_declaration($$) {
1084 my ($prototype, $file) = @_;
1085 my $func = "dump_" . $decl_type;
1089 sub dump_union($$) {
1093 sub dump_struct($$) {
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)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;};
1104 if ($x =~ /($type)\s+(\w+)\s*$definition_body/) {
1106 $declaration_name = $2;
1108 } elsif ($x =~ /typedef\s+($type)\s*$definition_body\s*(\w+)\s*;/) {
1110 $declaration_name = $3;
1115 if ($identifier ne $declaration_name) {
1116 emit_warning("${file}:$.", "expecting prototype for $decl_type $identifier. Prototype was for $decl_type $declaration_name instead\n");
1120 # ignore members marked private:
1121 $members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1122 $members =~ s/\/\*\s*private:.*//gosi;
1124 $members =~ s/\/\*.*?\*\///gos;
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;
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 = $members;
1155 # Split nested struct/union elements as newer ones
1156 while ($members =~ m/$struct_members/) {
1161 foreach my $id(split /,/, $ids) {
1162 $newmember .= "$maintype $id; ";
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
1174 if ($id =~ m/^\s*$/) {
1175 # anonymous struct/union
1176 $newmember .= "$type$name$extra; ";
1178 $newmember .= "$type$id.$name$extra; ";
1186 $arg =~ s/:\s*\d+\s*//g;
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+,]+)/) {
1200 $newmember .= "$arg; ";
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; ";
1210 $newmember .= "$type $id.$name; ";
1216 $members =~ s/$struct_members/$newmember/;
1219 # Ignore other nested elements, like enums
1220 $members =~ s/(\{[^\{\}]*\})//g;
1222 create_parameterlist($members, ';', $file, $declaration_name);
1223 check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
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/);
1231 my @def_args = split /\n/, $declaration;
1234 foreach my $clause (@def_args) {
1235 $clause =~ s/^\s+//;
1236 $clause =~ s/\s+$//;
1237 $clause =~ s/\s+/ /;
1239 $level-- if ($clause =~ m/(\})/ && $level > 1);
1240 if (!($clause =~ m/^\s*#/)) {
1241 $declaration .= "\t" x $level;
1243 $declaration .= "\t" . $clause . "\n";
1244 $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
1246 output_declaration($declaration_name,
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' => $decl_type
1261 print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
1267 sub show_warnings($$) {
1268 my $functype = shift;
1271 return 0 if (defined($nosymbol_table{$name}));
1273 return 1 if ($output_selection == OUTPUT_ALL);
1275 if ($output_selection == OUTPUT_EXPORTED) {
1276 if (defined($function_table{$name})) {
1282 if ($output_selection == OUTPUT_INTERNAL) {
1283 if (!($functype eq "function" && defined($function_table{$name}))) {
1289 if ($output_selection == OUTPUT_INCLUDE) {
1290 if (defined($function_table{$name})) {
1296 die("Please add the new output type at show_warnings()");
1305 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1306 # strip #define macros inside enums
1307 $x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
1309 if ($x =~ /typedef\s+enum\s*\{(.*)\}\s*(\w*)\s*;/) {
1310 $declaration_name = $2;
1312 } elsif ($x =~ /enum\s+(\w*)\s*\{(.*)\}/) {
1313 $declaration_name = $1;
1318 if ($identifier ne $declaration_name) {
1319 if ($identifier eq "") {
1320 emit_warning("${file}:$.", "wrong kernel-doc identifier on line:\n");
1322 emit_warning("${file}:$.", "expecting prototype for enum $identifier. Prototype was for enum $declaration_name instead\n");
1326 $declaration_name = "(anonymous)" if ($declaration_name eq "");
1330 $members =~ s/\s+$//;
1332 foreach my $arg (split ',', $members) {
1333 $arg =~ s/^\s*(\w+).*/$1/;
1334 push @parameterlist, $arg;
1335 if (!$parameterdescs{$arg}) {
1336 $parameterdescs{$arg} = $undescribed;
1337 if (show_warnings("enum", $declaration_name)) {
1338 emit_warning("${file}:$.", "Enum value '$arg' not described in enum '$declaration_name'\n");
1341 $_members{$arg} = 1;
1344 while (my ($k, $v) = each %parameterdescs) {
1345 if (!exists($_members{$k})) {
1346 if (show_warnings("enum", $declaration_name)) {
1347 emit_warning("${file}:$.", "Excess enum value '$k' description in '$declaration_name'\n");
1352 output_declaration($declaration_name,
1354 {'enum' => $declaration_name,
1355 'module' => $modulename,
1356 'parameterlist' => \@parameterlist,
1357 'parameterdescs' => \%parameterdescs,
1358 'sectionlist' => \@sectionlist,
1359 'sections' => \%sections,
1360 'purpose' => $declaration_purpose
1363 print STDERR "${file}:$.: error: Cannot parse enum!\n";
1368 my $typedef_type = qr { ((?:\s+[\w\*]+\b){1,8})\s* }x;
1369 my $typedef_ident = qr { \*?\s*(\w\S+)\s* }x;
1370 my $typedef_args = qr { \s*\((.*)\); }x;
1372 my $typedef1 = qr { typedef$typedef_type\($typedef_ident\)$typedef_args }x;
1373 my $typedef2 = qr { typedef$typedef_type$typedef_ident$typedef_args }x;
1375 sub dump_typedef($$) {
1379 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1381 # Parse function typedef prototypes
1382 if ($x =~ $typedef1 || $x =~ $typedef2) {
1384 $declaration_name = $2;
1386 $return_type =~ s/^\s+//;
1388 if ($identifier ne $declaration_name) {
1389 emit_warning("${file}:$.", "expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n");
1393 create_parameterlist($args, ',', $file, $declaration_name);
1395 output_declaration($declaration_name,
1397 {'function' => $declaration_name,
1399 'module' => $modulename,
1400 'functiontype' => $return_type,
1401 'parameterlist' => \@parameterlist,
1402 'parameterdescs' => \%parameterdescs,
1403 'parametertypes' => \%parametertypes,
1404 'sectionlist' => \@sectionlist,
1405 'sections' => \%sections,
1406 'purpose' => $declaration_purpose
1411 while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
1412 $x =~ s/\(*.\)\s*;$/;/;
1413 $x =~ s/\[*.\]\s*;$/;/;
1416 if ($x =~ /typedef.*\s+(\w+)\s*;/) {
1417 $declaration_name = $1;
1419 if ($identifier ne $declaration_name) {
1420 emit_warning("${file}:$.", "expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n");
1424 output_declaration($declaration_name,
1426 {'typedef' => $declaration_name,
1427 'module' => $modulename,
1428 'sectionlist' => \@sectionlist,
1429 'sections' => \%sections,
1430 'purpose' => $declaration_purpose
1434 print STDERR "${file}:$.: error: Cannot parse typedef!\n";
1439 sub save_struct_actual($) {
1442 # strip all spaces from the actual param so that it looks like one string item
1443 $actual =~ s/\s*//g;
1444 $struct_actual = $struct_actual . $actual . " ";
1447 sub create_parameterlist($$$$) {
1449 my $splitter = shift;
1451 my $declaration_name = shift;
1455 # temporarily replace commas inside function pointer definition
1456 my $arg_expr = qr{\([^\),]+};
1457 while ($args =~ /$arg_expr,/) {
1458 $args =~ s/($arg_expr),/$1#/g;
1461 foreach my $arg (split($splitter, $args)) {
1463 $arg =~ s/\/\*.*\*\///;
1464 # ignore argument attributes
1465 $arg =~ s/\sPOS0?\s/ /;
1466 # strip leading/trailing spaces
1472 # Treat preprocessor directive as a typeless variable just to fill
1473 # corresponding data structures "correctly". Catch it later in
1475 push_parameter($arg, "", "", $file);
1476 } elsif ($arg =~ m/\(.+\)\s*\(/) {
1477 # pointer-to-function
1479 $arg =~ m/[^\(]+\(\*?\s*([\w\[\]\.]*)\s*\)/;
1482 $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1483 save_struct_actual($param);
1484 push_parameter($param, $type, $arg, $file, $declaration_name);
1486 $arg =~ s/\s*:\s*/:/g;
1487 $arg =~ s/\s*\[/\[/g;
1489 my @args = split('\s*,\s*', $arg);
1490 if ($args[0] =~ m/\*/) {
1491 $args[0] =~ s/(\*+)\s*/ $1/;
1495 if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
1497 push(@first_arg, split('\s+', $1));
1498 push(@first_arg, $2);
1500 @first_arg = split('\s+', shift @args);
1503 unshift(@args, pop @first_arg);
1504 $type = join " ", @first_arg;
1506 foreach $param (@args) {
1507 if ($param =~ m/^(\*+)\s*(.*)/) {
1508 save_struct_actual($2);
1510 push_parameter($2, "$type $1", $arg, $file, $declaration_name);
1512 elsif ($param =~ m/(.*?):(\d+)/) {
1513 if ($type ne "") { # skip unnamed bit-fields
1514 save_struct_actual($1);
1515 push_parameter($1, "$type:$2", $arg, $file, $declaration_name)
1519 save_struct_actual($param);
1520 push_parameter($param, $type, $arg, $file, $declaration_name);
1527 sub push_parameter($$$$$) {
1530 my $org_arg = shift;
1532 my $declaration_name = shift;
1534 if (($anon_struct_union == 1) && ($type eq "") &&
1536 return; # ignore the ending }; from anon. struct/union
1539 $anon_struct_union = 0;
1540 $param =~ s/[\[\)].*//;
1542 if ($type eq "" && $param =~ /\.\.\.$/)
1544 if (!$param =~ /\w\.\.\.$/) {
1545 # handles unnamed variable parameters
1548 elsif ($param =~ /\w\.\.\.$/) {
1549 # for named variable parameters of the form `x...`, remove the dots
1550 $param =~ s/\.\.\.$//;
1552 if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
1553 $parameterdescs{$param} = "variable arguments";
1556 elsif ($type eq "" && ($param eq "" or $param eq "void"))
1559 $parameterdescs{void} = "no arguments";
1561 elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
1562 # handle unnamed (anonymous) union or struct:
1565 $param = "{unnamed_" . $param . "}";
1566 $parameterdescs{$param} = "anonymous\n";
1567 $anon_struct_union = 1;
1570 # warn if parameter has no description
1571 # (but ignore ones starting with # as these are not parameters
1572 # but inline preprocessor statements);
1573 # Note: It will also ignore void params and unnamed structs/unions
1574 if (!defined $parameterdescs{$param} && $param !~ /^#/) {
1575 $parameterdescs{$param} = $undescribed;
1577 if (show_warnings($type, $declaration_name) && $param !~ /\./) {
1578 emit_warning("${file}:$.", "Function parameter or member '$param' not described in '$declaration_name'\n");
1582 # strip spaces from $param so that it is one continuous string
1583 # on @parameterlist;
1584 # this fixes a problem where check_sections() cannot find
1585 # a parameter like "addr[6 + 2]" because it actually appears
1586 # as "addr[6", "+", "2]" on the parameter list;
1587 # but it's better to maintain the param string unchanged for output,
1588 # so just weaken the string compare in check_sections() to ignore
1589 # "[blah" in a parameter string;
1590 ###$param =~ s/\s*//g;
1591 push @parameterlist, $param;
1592 $org_arg =~ s/\s\s+/ /g;
1593 $parametertypes{$param} = $org_arg;
1596 sub check_sections($$$$$) {
1597 my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck) = @_;
1598 my @sects = split ' ', $sectcheck;
1599 my @prms = split ' ', $prmscheck;
1602 my $prm_clean; # strip trailing "[array size]" and/or beginning "*"
1604 foreach $sx (0 .. $#sects) {
1606 foreach $px (0 .. $#prms) {
1607 $prm_clean = $prms[$px];
1608 $prm_clean =~ s/\[.*\]//;
1609 $prm_clean =~ s/$attribute//i;
1610 # ignore array size in a parameter string;
1611 # however, the original param string may contain
1612 # spaces, e.g.: addr[6 + 2]
1613 # and this appears in @prms as "addr[6" since the
1614 # parameter list is split at spaces;
1615 # hence just ignore "[..." for the sections check;
1616 $prm_clean =~ s/\[.*//;
1618 ##$prm_clean =~ s/^\**//;
1619 if ($prm_clean eq $sects[$sx]) {
1625 if ($decl_type eq "function") {
1626 emit_warning("${file}:$.",
1627 "Excess function parameter " .
1629 "description in '$decl_name'\n");
1636 # Checks the section describing the return value of a function.
1637 sub check_return_section {
1639 my $declaration_name = shift;
1640 my $return_type = shift;
1642 # Ignore an empty return type (It's a macro)
1643 # Ignore functions with a "void" return type. (But don't ignore "void *")
1644 if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
1648 if (!defined($sections{$section_return}) ||
1649 $sections{$section_return} eq "") {
1650 emit_warning("${file}:$.",
1651 "No description found for return value of " .
1652 "'$declaration_name'\n");
1657 # takes a function prototype and the name of the current file being
1658 # processed and spits out all the details stored in the global
1660 sub dump_function($$) {
1661 my $prototype = shift;
1665 print_lineno($new_start_line);
1667 $prototype =~ s/^static +//;
1668 $prototype =~ s/^extern +//;
1669 $prototype =~ s/^asmlinkage +//;
1670 $prototype =~ s/^inline +//;
1671 $prototype =~ s/^__inline__ +//;
1672 $prototype =~ s/^__inline +//;
1673 $prototype =~ s/^__always_inline +//;
1674 $prototype =~ s/^noinline +//;
1675 $prototype =~ s/^__FORTIFY_INLINE +//;
1676 $prototype =~ s/__init +//;
1677 $prototype =~ s/__init_or_module +//;
1678 $prototype =~ s/__deprecated +//;
1679 $prototype =~ s/__flatten +//;
1680 $prototype =~ s/__meminit +//;
1681 $prototype =~ s/__must_check +//;
1682 $prototype =~ s/__weak +//;
1683 $prototype =~ s/__sched +//;
1684 $prototype =~ s/__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +//;
1685 $prototype =~ s/__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +//;
1686 $prototype =~ s/__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +//;
1687 my $define = $prototype =~ s/^#\s*define\s+//; #ak added
1688 $prototype =~ s/__attribute_const__ +//;
1689 $prototype =~ s/__attribute__\s*\(\(
1691 [\w\s]++ # attribute name
1692 (?:\([^)]*+\))? # attribute arguments
1693 \s*+,? # optional comma at the end
1697 # Yes, this truly is vile. We are looking for:
1698 # 1. Return type (may be nothing if we're looking at a macro)
1700 # 3. Function parameters.
1702 # All the while we have to watch out for function pointer parameters
1703 # (which IIRC is what the two sections are for), C types (these
1704 # regexps don't even start to express all the possibilities), and
1707 # If you mess with these regexps, it's a good idea to check that
1708 # the following functions' documentation still comes out right:
1709 # - parport_register_device (function pointer parameters)
1710 # - atomic_set (macro)
1711 # - pci_match_device, __copy_to_user (long return type)
1712 my $name = qr{[a-zA-Z0-9_~:]+};
1713 my $prototype_end1 = qr{[^\(]*};
1714 my $prototype_end2 = qr{[^\{]*};
1715 my $prototype_end = qr{\(($prototype_end1|$prototype_end2)\)};
1716 my $type1 = qr{[\w\s]+};
1717 my $type2 = qr{$type1\*+};
1719 if ($define && $prototype =~ m/^()($name)\s+/) {
1720 # This is an object-like macro, it has no return type and no parameter
1722 # Function-like macros are not allowed to have spaces between
1723 # declaration_name and opening parenthesis (notice the \s+).
1725 $declaration_name = $2;
1727 } elsif ($prototype =~ m/^()($name)\s*$prototype_end/ ||
1728 $prototype =~ m/^($type1)\s+($name)\s*$prototype_end/ ||
1729 $prototype =~ m/^($type2+)\s*($name)\s*$prototype_end/) {
1731 $declaration_name = $2;
1734 create_parameterlist($args, ',', $file, $declaration_name);
1736 emit_warning("${file}:$.", "cannot understand function prototype: '$prototype'\n");
1740 if ($identifier ne $declaration_name) {
1741 emit_warning("${file}:$.", "expecting prototype for $identifier(). Prototype was for $declaration_name() instead\n");
1745 my $prms = join " ", @parameterlist;
1746 check_sections($file, $declaration_name, "function", $sectcheck, $prms);
1748 # This check emits a lot of warnings at the moment, because many
1749 # functions don't have a 'Return' doc section. So until the number
1750 # of warnings goes sufficiently down, the check is only performed in
1752 # TODO: always perform the check.
1753 if ($verbose && !$noret) {
1754 check_return_section($file, $declaration_name, $return_type);
1757 # The function parser can be called with a typedef parameter.
1759 if ($return_type =~ /typedef/) {
1760 output_declaration($declaration_name,
1762 {'function' => $declaration_name,
1764 'module' => $modulename,
1765 'functiontype' => $return_type,
1766 'parameterlist' => \@parameterlist,
1767 'parameterdescs' => \%parameterdescs,
1768 'parametertypes' => \%parametertypes,
1769 'sectionlist' => \@sectionlist,
1770 'sections' => \%sections,
1771 'purpose' => $declaration_purpose
1774 output_declaration($declaration_name,
1776 {'function' => $declaration_name,
1777 'module' => $modulename,
1778 'functiontype' => $return_type,
1779 'parameterlist' => \@parameterlist,
1780 'parameterdescs' => \%parameterdescs,
1781 'parametertypes' => \%parametertypes,
1782 'sectionlist' => \@sectionlist,
1783 'sections' => \%sections,
1784 'purpose' => $declaration_purpose
1791 %parameterdescs = ();
1792 %parametertypes = ();
1793 @parameterlist = ();
1797 $struct_actual = "";
1800 $state = STATE_NORMAL;
1801 $inline_doc_state = STATE_INLINE_NA;
1804 sub tracepoint_munge($) {
1806 my $tracepointname = 0;
1807 my $tracepointargs = 0;
1809 if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
1810 $tracepointname = $1;
1812 if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
1813 $tracepointname = $1;
1815 if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
1816 $tracepointname = $2;
1818 $tracepointname =~ s/^\s+//; #strip leading whitespace
1819 if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
1820 $tracepointargs = $1;
1822 if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
1823 emit_warning("${file}:$.", "Unrecognized tracepoint format: \n".
1826 $prototype = "static inline void trace_$tracepointname($tracepointargs)";
1827 $identifier = "trace_$identifier";
1831 sub syscall_munge() {
1834 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
1835 ## if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
1836 if ($prototype =~ m/SYSCALL_DEFINE0/) {
1838 ## $prototype = "long sys_$1(void)";
1841 $prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
1842 if ($prototype =~ m/long (sys_.*?),/) {
1843 $prototype =~ s/,/\(/;
1845 $prototype =~ s/\)/\(void\)/;
1848 # now delete all of the odd-number commas in $prototype
1849 # so that arg types & arg names don't have a comma between them
1851 my $len = length($prototype);
1853 $len = 0; # skip the for-loop
1855 for (my $ix = 0; $ix < $len; $ix++) {
1856 if (substr($prototype, $ix, 1) eq ',') {
1858 if ($count % 2 == 1) {
1859 substr($prototype, $ix, 1) = ' ';
1865 sub process_proto_function($$) {
1869 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1871 if ($x =~ m#\s*/\*\s+MACDOC\s*#io || ($x =~ /^#/ && $x !~ /^#\s*define/)) {
1874 elsif ($x =~ /([^\{]*)/) {
1878 if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
1879 $prototype =~ s@/\*.*?\*/@@gos; # strip comments.
1880 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1881 $prototype =~ s@^\s+@@gos; # strip leading spaces
1883 # Handle prototypes for function pointers like:
1884 # int (*pcs_config)(struct foo)
1885 $prototype =~ s@^(\S+\s+)\(\s*\*(\S+)\)@$1$2@gos;
1887 if ($prototype =~ /SYSCALL_DEFINE/) {
1890 if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
1891 $prototype =~ /DEFINE_SINGLE_EVENT/)
1893 tracepoint_munge($file);
1895 dump_function($prototype, $file);
1900 sub process_proto_type($$) {
1904 $x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1905 $x =~ s@^\s+@@gos; # strip leading spaces
1906 $x =~ s@\s+$@@gos; # strip trailing spaces
1907 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1910 # To distinguish preprocessor directive from regular declaration later.
1915 if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
1916 if( length $prototype ) {
1919 $prototype .= $1 . $2;
1920 ($2 eq '{') && $brcount++;
1921 ($2 eq '}') && $brcount--;
1922 if (($2 eq ';') && ($brcount == 0)) {
1923 dump_declaration($prototype, $file);
1936 sub map_filename($) {
1938 my ($orig_file) = @_;
1940 if (defined($ENV{'SRCTREE'})) {
1941 $file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
1946 if (defined($source_map{$file})) {
1947 $file = $source_map{$file};
1953 sub process_export_file($) {
1954 my ($orig_file) = @_;
1955 my $file = map_filename($orig_file);
1957 if (!open(IN,"<$file")) {
1958 print STDERR "Error: Cannot open file $file\n";
1964 if (/$export_symbol/) {
1965 next if (defined($nosymbol_table{$2}));
1966 $function_table{$2} = 1;
1968 if (/$export_symbol_ns/) {
1969 next if (defined($nosymbol_table{$2}));
1970 $function_table{$2} = 1;
1978 # Parsers for the various processing states.
1980 # STATE_NORMAL: looking for the /** to begin everything.
1982 sub process_normal() {
1983 if (/$doc_start/o) {
1984 $state = STATE_NAME; # next line is always the function name
1986 $declaration_start_line = $. + 1;
1991 # STATE_NAME: Looking for the "name - description" line
1993 sub process_name($$) {
1997 if (/$doc_block/o) {
1998 $state = STATE_DOCBLOCK;
2000 $new_start_line = $.;
2003 $section = $section_intro;
2007 } elsif (/$doc_decl/o) {
2009 my $is_kernel_comment = 0;
2010 my $decl_start = qr{$doc_com};
2011 # test for pointer declaration type, foo * bar() - desc
2012 my $fn_type = qr{\w+\s*\*\s*};
2013 my $parenthesis = qr{\(\w*\)};
2014 my $decl_end = qr{[-:].*};
2015 if (/^$decl_start([\w\s]+?)$parenthesis?\s*$decl_end?$/) {
2018 if ($identifier =~ m/^(struct|union|enum|typedef)\b\s*(\S*)/) {
2021 $is_kernel_comment = 1;
2023 # Look for foo() or static void foo() - description; or misspelt
2025 elsif (/^$decl_start$fn_type?(\w+)\s*$parenthesis?\s*$decl_end?$/ ||
2026 /^$decl_start$fn_type?(\w+.*)$parenthesis?\s*$decl_end$/) {
2028 $decl_type = 'function';
2029 $identifier =~ s/^define\s+//;
2030 $is_kernel_comment = 1;
2032 $identifier =~ s/\s+$//;
2034 $state = STATE_BODY;
2035 # if there's no @param blocks need to set up default section
2038 $section = $section_default;
2039 $new_start_line = $. + 1;
2041 # strip leading/trailing/multiple spaces
2045 $descr =~ s/\s+/ /g;
2046 $declaration_purpose = $descr;
2047 $state = STATE_BODY_MAYBE;
2049 $declaration_purpose = "";
2052 if (!$is_kernel_comment) {
2053 emit_warning("${file}:$.", "This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst\n$_");
2054 $state = STATE_NORMAL;
2057 if (($declaration_purpose eq "") && $verbose) {
2058 emit_warning("${file}:$.", "missing initial short description on line:\n$_");
2061 if ($identifier eq "" && $decl_type ne "enum") {
2062 emit_warning("${file}:$.", "wrong kernel-doc identifier on line:\n$_");
2063 $state = STATE_NORMAL;
2067 print STDERR "${file}:$.: info: Scanning doc for $decl_type $identifier\n";
2070 emit_warning("${file}:$.", "Cannot understand $_ on line $. - I thought it was a doc line\n");
2071 $state = STATE_NORMAL;
2077 # STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
2079 sub process_body($$) {
2082 if ($state == STATE_BODY_WITH_BLANK_LINE && /^\s*\*\s?\S/) {
2083 dump_section($file, $section, $contents);
2084 $section = $section_default;
2085 $new_start_line = $.;
2089 if (/$doc_sect/i) { # case insensitive for supported section names
2093 # map the supported section names to the canonical names
2094 if ($newsection =~ m/^description$/i) {
2095 $newsection = $section_default;
2096 } elsif ($newsection =~ m/^context$/i) {
2097 $newsection = $section_context;
2098 } elsif ($newsection =~ m/^returns?$/i) {
2099 $newsection = $section_return;
2100 } elsif ($newsection =~ m/^\@return$/) {
2101 # special: @return is a section, not a param description
2102 $newsection = $section_return;
2105 if (($contents ne "") && ($contents ne "\n")) {
2106 if (!$in_doc_sect && $verbose) {
2107 emit_warning("${file}:$.", "contents before sections\n");
2109 dump_section($file, $section, $contents);
2110 $section = $section_default;
2114 $state = STATE_BODY;
2115 $contents = $newcontents;
2116 $new_start_line = $.;
2117 while (substr($contents, 0, 1) eq " ") {
2118 $contents = substr($contents, 1);
2120 if ($contents ne "") {
2123 $section = $newsection;
2124 $leading_space = undef;
2125 } elsif (/$doc_end/) {
2126 if (($contents ne "") && ($contents ne "\n")) {
2127 dump_section($file, $section, $contents);
2128 $section = $section_default;
2131 # look for doc_com + <text> + doc_end:
2132 if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
2133 emit_warning("${file}:$.", "suspicious ending line: $_");
2137 $state = STATE_PROTO;
2139 $new_start_line = $. + 1;
2140 } elsif (/$doc_content/) {
2142 if ($section eq $section_context) {
2143 dump_section($file, $section, $contents);
2144 $section = $section_default;
2146 $new_start_line = $.;
2147 $state = STATE_BODY;
2149 if ($section ne $section_default) {
2150 $state = STATE_BODY_WITH_BLANK_LINE;
2152 $state = STATE_BODY;
2156 } elsif ($state == STATE_BODY_MAYBE) {
2157 # Continued declaration purpose
2158 chomp($declaration_purpose);
2159 $declaration_purpose .= " " . $1;
2160 $declaration_purpose =~ s/\s+/ /g;
2163 if ($section =~ m/^@/ || $section eq $section_context) {
2164 if (!defined $leading_space) {
2165 if ($cont =~ m/^(\s+)/) {
2166 $leading_space = $1;
2168 $leading_space = "";
2171 $cont =~ s/^$leading_space//;
2173 $contents .= $cont . "\n";
2176 # i dont know - bad line? ignore.
2177 emit_warning("${file}:$.", "bad line: $_");
2183 # STATE_PROTO: reading a function/whatever prototype.
2185 sub process_proto($$) {
2188 if (/$doc_inline_oneline/) {
2191 if ($contents ne "") {
2193 dump_section($file, $section, $contents);
2194 $section = $section_default;
2197 } elsif (/$doc_inline_start/) {
2198 $state = STATE_INLINE;
2199 $inline_doc_state = STATE_INLINE_NAME;
2200 } elsif ($decl_type eq 'function') {
2201 process_proto_function($_, $file);
2203 process_proto_type($_, $file);
2208 # STATE_DOCBLOCK: within a DOC: block.
2210 sub process_docblock($$) {
2214 dump_doc_section($file, $section, $contents);
2215 $section = $section_default;
2218 %parameterdescs = ();
2219 %parametertypes = ();
2220 @parameterlist = ();
2224 $state = STATE_NORMAL;
2225 } elsif (/$doc_content/) {
2227 $contents .= $blankline;
2229 $contents .= $1 . "\n";
2235 # STATE_INLINE: docbook comments within a prototype.
2237 sub process_inline($$) {
2240 # First line (state 1) needs to be a @parameter
2241 if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
2244 $new_start_line = $.;
2245 if ($contents ne "") {
2246 while (substr($contents, 0, 1) eq " ") {
2247 $contents = substr($contents, 1);
2251 $inline_doc_state = STATE_INLINE_TEXT;
2252 # Documentation block end */
2253 } elsif (/$doc_inline_end/) {
2254 if (($contents ne "") && ($contents ne "\n")) {
2255 dump_section($file, $section, $contents);
2256 $section = $section_default;
2259 $state = STATE_PROTO;
2260 $inline_doc_state = STATE_INLINE_NA;
2262 } elsif (/$doc_content/) {
2263 if ($inline_doc_state == STATE_INLINE_TEXT) {
2264 $contents .= $1 . "\n";
2265 # nuke leading blank lines
2266 if ($contents =~ /^\s*$/) {
2269 } elsif ($inline_doc_state == STATE_INLINE_NAME) {
2270 $inline_doc_state = STATE_INLINE_ERROR;
2271 emit_warning("${file}:$.", "Incorrect use of kernel-doc format: $_");
2277 sub process_file($) {
2279 my $initial_section_counter = $section_counter;
2280 my ($orig_file) = @_;
2282 $file = map_filename($orig_file);
2284 if (!open(IN_FILE,"<$file")) {
2285 print STDERR "Error: Cannot open file $file\n";
2292 $section_counter = 0;
2294 while (s/\\\s*$//) {
2297 # Replace tabs by spaces
2298 while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
2299 # Hand this line to the appropriate state handler
2300 if ($state == STATE_NORMAL) {
2302 } elsif ($state == STATE_NAME) {
2303 process_name($file, $_);
2304 } elsif ($state == STATE_BODY || $state == STATE_BODY_MAYBE ||
2305 $state == STATE_BODY_WITH_BLANK_LINE) {
2306 process_body($file, $_);
2307 } elsif ($state == STATE_INLINE) { # scanning for inline parameters
2308 process_inline($file, $_);
2309 } elsif ($state == STATE_PROTO) {
2310 process_proto($file, $_);
2311 } elsif ($state == STATE_DOCBLOCK) {
2312 process_docblock($file, $_);
2316 # Make sure we got something interesting.
2317 if ($initial_section_counter == $section_counter && $
2318 output_mode ne "none") {
2319 if ($output_selection == OUTPUT_INCLUDE) {
2320 emit_warning("${file}:1", "'$_' not found\n")
2321 for keys %function_table;
2324 emit_warning("${file}:1", "no structured comments found\n");
2331 if ($output_mode eq "rst") {
2332 get_sphinx_version() if (!$sphinx_major);
2335 $kernelversion = get_kernel_version();
2337 # generate a sequence of code that will splice in highlighting information
2338 # using the s// operator.
2339 for (my $k = 0; $k < @highlights; $k++) {
2340 my $pattern = $highlights[$k][0];
2341 my $result = $highlights[$k][1];
2342 # print STDERR "scanning pattern:$pattern, highlight:($result)\n";
2343 $dohighlight .= "\$contents =~ s:$pattern:$result:gs;\n";
2346 # Read the file that maps relative names to absolute names for
2347 # separate source and object directories and for shadow trees.
2348 if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
2349 my ($relname, $absname);
2350 while(<SOURCE_MAP>) {
2352 ($relname, $absname) = (split())[0..1];
2353 $relname =~ s:^/+::;
2354 $source_map{$relname} = $absname;
2359 if ($output_selection == OUTPUT_EXPORTED ||
2360 $output_selection == OUTPUT_INTERNAL) {
2362 push(@export_file_list, @ARGV);
2364 foreach (@export_file_list) {
2366 process_export_file($_);
2374 if ($verbose && $errors) {
2375 print STDERR "$errors errors\n";
2377 if ($verbose && $warnings) {
2378 print STDERR "$warnings warnings\n";
2381 if ($Werror && $warnings) {
2382 print STDERR "$warnings warnings as Errors\n";
2385 exit($output_mode eq "none" ? 0 : $errors)
2392 =head2 Output format selection (mutually exclusive):
2398 Output troff manual page format.
2402 Output reStructuredText format. This is the default.
2406 Do not output documentation, only warnings.
2410 =head2 Output format modifiers
2412 =head3 reStructuredText only
2416 =item -sphinx-version VERSION
2418 Use the ReST C domain dialect compatible with a specific Sphinx Version.
2420 If not specified, kernel-doc will auto-detect using the sphinx-build version
2425 =head2 Output selection (mutually exclusive):
2431 Only output documentation for the symbols that have been exported using
2432 EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
2436 Only output documentation for the symbols that have NOT been exported using
2437 EXPORT_SYMBOL() and related macros in any input FILE or -export-file FILE.
2439 =item -function NAME
2441 Only output documentation for the given function or DOC: section title.
2442 All other functions and DOC: sections are ignored.
2444 May be specified multiple times.
2446 =item -nosymbol NAME
2448 Exclude the specified symbol from the output documentation.
2450 May be specified multiple times.
2454 =head2 Output selection modifiers:
2458 =item -no-doc-sections
2460 Do not output DOC: sections.
2462 =item -export-file FILE
2464 Specify an additional FILE in which to look for EXPORT_SYMBOL information.
2466 To be used with -export or -internal.
2468 May be specified multiple times.
2472 =head3 reStructuredText only
2476 =item -enable-lineno
2478 Enable output of .. LINENO lines.
2482 =head2 Other parameters:
2492 Verbose output, more warnings and other information.
2496 Treat warnings as errors.