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/
usr/
src/
linux-headers-3.0.0-14/
scripts/
- drwxr-xr-x
|
Viewing file:  headers_check.pl (2.71 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#!/usr/bin/perl -w
#
# headers_check.pl execute a number of trivial consistency checks
#
# Usage: headers_check.pl dir arch [files...]
# dir: dir to look for included files
# arch: architecture
# files: list of files to check
#
# The script reads the supplied files line by line and:
#
# 1) for each include statement it checks if the
# included file actually exists.
# Only include files located in asm* and linux* are checked.
# The rest are assumed to be system include files.
#
# 2) It is checked that prototypes does not use "extern"
#
# 3) Check for leaked CONFIG_ symbols
use strict;
my ($dir, $arch, @files) = @ARGV;
my $ret = 0;
my $line;
my $lineno = 0;
my $filename;
foreach my $file (@files) {
$filename = $file;
open(my $fh, '<', $filename)
or die "$filename: $!\n";
$lineno = 0;
while ($line = <$fh>) {
$lineno++;
&check_include();
&check_asm_types();
&check_sizetypes();
&check_declarations();
# Dropped for now. Too much noise &check_config();
}
close $fh;
}
exit $ret;
sub check_include
{
if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
my $inc = $1;
my $found;
$found = stat($dir . "/" . $inc);
if (!$found) {
$inc =~ s#asm/#asm-$arch/#;
$found = stat($dir . "/" . $inc);
}
if (!$found) {
printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
$ret = 1;
}
}
}
sub check_declarations
{
if ($line =~m/^(\s*extern|unsigned|char|short|int|long|void)\b/) {
printf STDERR "$filename:$lineno: " .
"userspace cannot reference function or " .
"variable defined in the kernel\n";
}
}
sub check_config
{
if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
}
}
my $linux_asm_types;
sub check_asm_types
{
if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
return;
}
if ($lineno == 1) {
$linux_asm_types = 0;
} elsif ($linux_asm_types >= 1) {
return;
}
if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
$linux_asm_types = 1;
printf STDERR "$filename:$lineno: " .
"include of <linux/types.h> is preferred over <asm/types.h>\n"
# Warn until headers are all fixed
#$ret = 1;
}
}
my $linux_types;
sub check_sizetypes
{
if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
return;
}
if ($lineno == 1) {
$linux_types = 0;
} elsif ($linux_types >= 1) {
return;
}
if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
$linux_types = 1;
return;
}
if ($line =~ m/__[us](8|16|32|64)\b/) {
printf STDERR "$filename:$lineno: " .
"found __[us]{8,16,32,64} type " .
"without #include <linux/types.h>\n";
$linux_types = 2;
# Warn until headers are all fixed
#$ret = 1;
}
}
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