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", "Recommend using this as the last option\n", "\t-h: print detailed help\n", "\t-k: the path to Module.symvers file. By default uses ", "the file from the current directory\n", "\t-o outputfile: output the report to outputfile\n"; exit 0; } sub collectcfiles { my @file; open my $fh, '< modules.order' or die "cannot open modules.order: $!\n"; while (<$fh>) { s/\.ko$/.mod.c/; push (@file, $_) } close($fh); chomp @file; return @file; } my (%SYMBOL, %MODULE, %opt, @allcfiles); if (not getopts('hk:o:f',\%opt) or defined $opt{'h'}) { usage($0); } if (defined $opt{'f'}) { @allcfiles = @ARGV; } else { @allcfiles = collectcfiles(); } if (not defined $opt{'k'}) { $opt{'k'} = "Module.symvers"; } open (my $module_symvers, '<', $opt{'k'}) or die "Sorry, cannot open $opt{'k'}: $!\n"; if (defined $opt{'o'}) { open (my $out, '>', $opt{'o'}) or die "Sorry, cannot open $opt{'o'} $!\n"; select $out; } # # collect all the symbols and their attributes from the # Module.symvers file # while ( <$module_symvers> ) { chomp; my (undef, $symbol, $module, $gpl, $namespace) = split('\t'); $SYMBOL { $symbol } = [ $module , "0" , $symbol, $gpl]; } close($module_symvers); # # collect the usage count of each symbol. # my $modversion_warnings = 0; foreach my $thismod (@allcfiles) { my $module; unless (open ($module, '<', $thismod)) { warn "Sorry, cannot open $thismod: $!\n"; next; } my $state=0; while ( <$module> ) { chomp; if ($state == 0) { $state = 1 if ($_ =~ /static const struct modversion_info/); next; } if ($state == 1) { $state = 2 if ($_ =~ /__attribute__\(\(section\("__versions"\)\)\)/); next; } if ($state == 2) { if ( $_ !~ /0x[0-9a-f]+,/ ) { next; } my $sym = (split /([,"])/,)[4]; my ($module, $value, $symbol, $gpl) = @{$SYMBOL{$sym}}; $SYMBOL{ $sym } = [ $module, $value+1, $symbol, $gpl]; push(@{$MODULE{$thismod}} , $sym); } } if ($state != 2) { warn "WARNING:$thismod is not built with CONFIG_MODVERSIONS enabled\n"; $modversion_warnings++; } close($module); } print "\tThis file reports the exported symbols usage patterns by in-tree\n", "\t\t\t\tmodules\n"; printf("%s\n\n\n","x"x80); printf("\t\t\t\tINDEX\n\n\n"); printf("SECTION 1: Usage counts of all exported symbols\n"); printf("SECTION 2: List of modules and the exported symbols they use\n"); printf("%s\n\n\n","x"x80); printf("SECTION 1:\tThe exported symbols and their usage count\n\n"); printf("%-25s\t%-25s\t%-5s\t%-25s\n", "Symbol", "Module", "Usage count", "export type"); # # print the list of unused exported symbols # foreach my $list (sort alphabetically values(%SYMBOL)) { my ($module, $value, $symbol, $gpl) = @{$list}; printf("%-25s\t%-25s\t%-10s\t", $symbol, $module, $value); if (defined $gpl) { printf("%-25s\n",$gpl); } else { printf("\n"); } } printf("%s\n\n\n","x"x80); printf("SECTION 2:\n\tThis section reports export-symbol-usage of in-kernel modules. Each module lists the modules, and the symbols from that module that it uses. Each listed symbol reports the number of modules using it\n"); print "\nNOTE: Got $modversion_warnings CONFIG_MODVERSIONS warnings\n\n" if $modversion_warnings; print "~"x80 , "\n"; for my $thismod (sort keys %MODULE) { my $list = $MODULE{$thismod}; my %depends; $thismod =~ s/\.mod\.c/.ko/; print "\t\t\t$thismod\n"; foreach my $symbol (@{$list}) { my ($module, $value, undef, $gpl) = @{$SYMBOL{$symbol}}; push (@{$depends{"$module"}}, "$symbol $value"); } print_depends_on(\%depends); }