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kernel-vmi
kabi.pl
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File kabi.pl of Package kernel-vmi
#!/usr/bin/perl use strict; use warnings; use Getopt::Long; use Data::Dumper; # ( { sym => regexp, mod => regexp, fail => 0/1 }, ... ) my @rules; my ($opt_verbose, $opt_rules); sub load_rules { my $file = shift; my $errors = 0; xopen(my $fh, '<', $file); while (<$fh>) { chomp; s/#.*//; next if /^\s*$/; my ($pattern, $verdict) = split(/\s+/); my $new = {}; if (uc($verdict) eq "PASS") { $new->{fail} = 0; } elsif (uc($verdict) eq "FAIL") { $new->{fail} = 1; } else { print STDERR "$file:$.: invalid verdict \"$verdict\", must be either PASS or FAIL.\n"; $errors++; next; } # simple glob -> regexp conversion $pattern =~ s/\*/.*/g; $pattern =~ s/\?/./g; $pattern =~ s/.*/^$&\$/; if ($pattern =~ /\/|^vmlinux$/) { $new->{mod} = $pattern; } else { $new->{sym} = $pattern; } push(@rules, $new); } if ($errors && !@rules) { print STDERR "error: only garbage found in $file.\n"; exit 1; } close($fh); } sub load_symvers { my $file = shift; my %res; my $errors = 0; xopen(my $fh, '<', $file); while (<$fh>) { my @l = split(/\s+/); if (@l < 3) { print STDERR "$file:$.: unknown line\n"; $errors++; next; } my $new = { crc => $l[0], mod => $l[2] }; $res{$l[1]} = $new; } if (!%res) { print STDERR "error: no symvers found in $file.\n"; exit 1; } close($fh); return %res; } my $kabi_errors = 0; sub kabi_change { my ($sym, $mod, $oldcrc, $newcrc) = @_; my $fail = 1; for my $rule (@rules) { if ($rule->{mod} && $mod =~ $rule->{mod} || $rule->{sym} && $sym =~ $rule->{sym}) { $fail = $rule->{fail}; last; } } return unless $fail or $opt_verbose; print STDERR "KABI: symbol $sym($mod) "; if ($newcrc) { print STDERR "changed crc from $oldcrc to $newcrc" } else { print STDERR "lost"; } if ($fail) { $kabi_errors++; print STDERR "\n"; } else { print STDERR " (tolerated)\n"; } } sub xopen { open($_[0], $_[1], @_[2..$#_]) or die "$_[2]: $!\n"; } my $res = GetOptions( 'verbose|v' => \$opt_verbose, 'rules|r=s' => \$opt_rules, ); if (!$res || @ARGV != 2) { print STDERR "Usage: $0 [--rules <rules file>] Module.symvers.old Module.symvers\n"; exit 1; } if (defined($opt_rules)) { load_rules($opt_rules); } my %old = load_symvers($ARGV[0]); my %new = load_symvers($ARGV[1]); for my $sym (sort keys(%old)) { if (!$new{$sym}) { kabi_change($sym, $old{$sym}->{mod}, $old{$sym}->{crc}, 0); } elsif ($old{$sym}->{crc} ne $new{$sym}->{crc}) { kabi_change($sym, $new{$sym}->{mod}, $old{$sym}->{crc}, $new{$sym}->{crc}); } } if ($kabi_errors) { print STDERR "KABI: aborting due to kabi changes.\n"; exit 1; } exit 0;
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