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