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# FIPS assembly language preprocessor
# Renames all symbols in the file to
# their modified fips versions.
my @ARGS = @ARGV;
my $top = shift @ARGS;
my $target = shift @ARGS;
my $tmptarg = $target;
$tmptarg =~ s/\.[^\\\/\.]+$/.tmp/;
my $runasm = 1;
if ($ARGS[0] eq "norunasm")
{
$runasm = 0;
shift @ARGS;
}
my $enabled = 0;
$enabled = 1 if $ENV{FIPSCANISTERINTERNAL} eq "y";
if ($enabled == 0 && $runasm)
{
system @ARGS;
exit $?
}
# Open symbol rename file.
open(IN, "$top/fips/fipssyms.h") || die "Can't open fipssyms.h";
# Skip to assembler symbols
while (<IN>)
{
last if (/assembler/)
}
# Store all renames.
while (<IN>)
{
if (/^#define\s+(\w+)\s+(\w+)\b/)
{
$edits{$1} = $2;
}
}
my ($from, $to);
#delete any temp file lying around
unlink $tmptarg;
#rename target temporarily
rename($target, $tmptarg) || die "Can't rename $target";
#edit target
open(IN,$tmptarg) || die "Can't open temporary file";
open(OUT, ">$target") || die "Can't open output file $target";
while (<IN>)
{
while (($from, $to) = each %edits)
{
s/(\b_*)$from(\b)/$1$to$2/g;
}
print OUT $_;
}
close OUT;
if ($runasm)
{
# run assembler
system @ARGS;
my $rv = $?;
# restore target
unlink $target;
rename $tmptarg, $target;
die "Error executing assembler!" if $rv != 0;
}
else
{
# Don't care about target
unlink $tmptarg;
}
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