| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 21 |
|
| 22 | use warnings;
|
| 23 | use strict;
|
| 24 | use File::Basename;
|
| 25 |
|
| 26 | my ($dir, $arch, @files) = @ARGV;
|
| 27 |
|
| 28 | my $ret = 0;
|
| 29 | my $line;
|
| 30 | my $lineno = 0;
|
| 31 | my $filename;
|
| 32 |
|
| 33 | foreach my $file (@files) {
|
| 34 | $filename = $file;
|
| 35 |
|
| 36 | open(my $fh, '<', $filename)
|
| 37 | or die "$filename: $!\n";
|
| 38 | $lineno = 0;
|
| 39 | while ($line = <$fh>) {
|
| 40 | $lineno++;
|
| 41 | &check_include();
|
| 42 | &check_asm_types();
|
| 43 | &check_sizetypes();
|
| 44 | &check_declarations();
|
| 45 | |
| 46 | }
|
| 47 | close $fh;
|
| 48 | }
|
| 49 | exit $ret;
|
| 50 |
|
| 51 | sub check_include
|
| 52 | {
|
| 53 | if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
|
| 54 | my $inc = $1;
|
| 55 | my $found;
|
| 56 | $found = stat($dir . "/" . $inc);
|
| 57 | if (!$found) {
|
| 58 | $inc =~ s |
| 59 | $found = stat($dir . "/" . $inc);
|
| 60 | }
|
| 61 | if (!$found) {
|
| 62 | printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
|
| 63 | $ret = 1;
|
| 64 | }
|
| 65 | }
|
| 66 | }
|
| 67 |
|
| 68 | sub check_declarations
|
| 69 | {
|
| 70 | |
| 71 | if ($line =~ m/^void seqbuf_dump\(void\);/) {
|
| 72 | return;
|
| 73 | }
|
| 74 | |
| 75 | if ($line =~ m/^extern "C"/) {
|
| 76 | return;
|
| 77 | }
|
| 78 | if ($line =~ m/^(\s*extern|unsigned|char|short|int|long|void)\b/) {
|
| 79 | printf STDERR "$filename:$lineno: " .
|
| 80 | "userspace cannot reference function or " .
|
| 81 | "variable defined in the kernel\n";
|
| 82 | }
|
| 83 | }
|
| 84 |
|
| 85 | sub check_config
|
| 86 | {
|
| 87 | if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
|
| 88 | printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
|
| 89 | }
|
| 90 | }
|
| 91 |
|
| 92 | my $linux_asm_types;
|
| 93 | sub check_asm_types
|
| 94 | {
|
| 95 | if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
|
| 96 | return;
|
| 97 | }
|
| 98 | if ($lineno == 1) {
|
| 99 | $linux_asm_types = 0;
|
| 100 | } elsif ($linux_asm_types >= 1) {
|
| 101 | return;
|
| 102 | }
|
| 103 | if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
|
| 104 | $linux_asm_types = 1;
|
| 105 | printf STDERR "$filename:$lineno: " .
|
| 106 | "include of <linux/types.h> is preferred over <asm/types.h>\n"
|
| 107 | |
| 108 | |
| 109 | }
|
| 110 | }
|
| 111 |
|
| 112 | my $linux_types;
|
| 113 | my %import_stack = ();
|
| 114 | sub check_include_typesh
|
| 115 | {
|
| 116 | my $path = $_[0];
|
| 117 | my $import_path;
|
| 118 |
|
| 119 | my $fh;
|
| 120 | my @file_paths = ($path, $dir . "/" . $path, dirname($filename) . "/" . $path);
|
| 121 | for my $possible ( @file_paths ) {
|
| 122 | if (not $import_stack{$possible} and open($fh, '<', $possible)) {
|
| 123 | $import_path = $possible;
|
| 124 | $import_stack{$import_path} = 1;
|
| 125 | last;
|
| 126 | }
|
| 127 | }
|
| 128 | if (eof $fh) {
|
| 129 | return;
|
| 130 | }
|
| 131 |
|
| 132 | my $line;
|
| 133 | while ($line = <$fh>) {
|
| 134 | if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
|
| 135 | $linux_types = 1;
|
| 136 | last;
|
| 137 | }
|
| 138 | if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
|
| 139 | check_include_typesh($included);
|
| 140 | }
|
| 141 | }
|
| 142 | close $fh;
|
| 143 | delete $import_stack{$import_path};
|
| 144 | }
|
| 145 |
|
| 146 | sub check_sizetypes
|
| 147 | {
|
| 148 | if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
|
| 149 | return;
|
| 150 | }
|
| 151 | if ($lineno == 1) {
|
| 152 | $linux_types = 0;
|
| 153 | } elsif ($linux_types >= 1) {
|
| 154 | return;
|
| 155 | }
|
| 156 | if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
|
| 157 | $linux_types = 1;
|
| 158 | return;
|
| 159 | }
|
| 160 | if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
|
| 161 | check_include_typesh($included);
|
| 162 | }
|
| 163 | if ($line =~ m/__[us](8|16|32|64)\b/) {
|
| 164 | printf STDERR "$filename:$lineno: " .
|
| 165 | "found __[us]{8,16,32,64} type " .
|
| 166 | "without #include <linux/types.h>\n";
|
| 167 | $linux_types = 2;
|
| 168 | |
| 169 | |
| 170 | }
|
| 171 | }
|