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1 | #!/usr/bin/perl -w |
2 | # |
3 | # headers_check.pl execute a number of trivial consistency checks |
4 | # |
5 | # Usage: headers_check.pl dir arch [files...] |
6 | # dir: dir to look for included files |
7 | # arch: architecture |
8 | # files: list of files to check |
9 | # |
10 | # The script reads the supplied files line by line and: |
11 | # |
12 | # 1) for each include statement it checks if the |
13 | # included file actually exists. |
14 | # Only include files located in asm* and linux* are checked. |
15 | # The rest are assumed to be system include files. |
16 | # |
17 | # 2) It is checked that prototypes does not use "extern" |
18 | # |
19 | # 3) Check for leaked CONFIG_ symbols |
20 | |
21 | use strict; |
22 | |
23 | my ($dir, $arch, @files) = @ARGV; |
24 | |
25 | my $ret = 0; |
26 | my $line; |
27 | my $lineno = 0; |
28 | my $filename; |
29 | |
30 | foreach my $file (@files) { |
31 | local *FH; |
32 | $filename = $file; |
33 | open(FH, "<$filename") or die "$filename: $!\n"; |
34 | $lineno = 0; |
35 | while ($line = <FH>) { |
36 | $lineno++; |
37 | &check_include(); |
38 | &check_asm_types(); |
39 | &check_sizetypes(); |
40 | &check_declarations(); |
41 | # Dropped for now. Too much noise &check_config(); |
42 | } |
43 | close FH; |
44 | } |
45 | exit $ret; |
46 | |
47 | sub check_include |
48 | { |
49 | if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) { |
50 | my $inc = $1; |
51 | my $found; |
52 | $found = stat($dir . "/" . $inc); |
53 | if (!$found) { |
54 | $inc =~ s#asm/#asm-$arch/#; |
55 | $found = stat($dir . "/" . $inc); |
56 | } |
57 | if (!$found) { |
58 | printf STDERR "$filename:$lineno: included file '$inc' is not exported\n"; |
59 | $ret = 1; |
60 | } |
61 | } |
62 | } |
63 | |
64 | sub check_declarations |
65 | { |
66 | if ($line =~m/^\s*extern\b/) { |
67 | printf STDERR "$filename:$lineno: " . |
68 | "userspace cannot call function or variable " . |
69 | "defined in the kernel\n"; |
70 | } |
71 | } |
72 | |
73 | sub check_config |
74 | { |
75 | if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) { |
76 | printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n"; |
77 | } |
78 | } |
79 | |
80 | my $linux_asm_types; |
81 | sub check_asm_types() |
82 | { |
83 | if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) { |
84 | return; |
85 | } |
86 | if ($lineno == 1) { |
87 | $linux_asm_types = 0; |
88 | } elsif ($linux_asm_types >= 1) { |
89 | return; |
90 | } |
91 | if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) { |
92 | $linux_asm_types = 1; |
93 | printf STDERR "$filename:$lineno: " . |
94 | "include of <linux/types.h> is preferred over <asm/types.h>\n" |
95 | # Warn until headers are all fixed |
96 | #$ret = 1; |
97 | } |
98 | } |
99 | |
100 | my $linux_types; |
101 | sub check_sizetypes |
102 | { |
103 | if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) { |
104 | return; |
105 | } |
106 | if ($lineno == 1) { |
107 | $linux_types = 0; |
108 | } elsif ($linux_types >= 1) { |
109 | return; |
110 | } |
111 | if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) { |
112 | $linux_types = 1; |
113 | return; |
114 | } |
115 | if ($line =~ m/__[us](8|16|32|64)\b/) { |
116 | printf STDERR "$filename:$lineno: " . |
117 | "found __[us]{8,16,32,64} type " . |
118 | "without #include <linux/types.h>\n"; |
119 | $linux_types = 2; |
120 | # Warn until headers are all fixed |
121 | #$ret = 1; |
122 | } |
123 | } |
124 | |
125 |
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