| #!/usr/bin/env perl |
| |
| # ARM assembler distiller by <appro>. |
| |
| my $flavour = shift; |
| my $output = shift; |
| open STDOUT,">$output" || die "can't open $output: $!"; |
| |
| $flavour = "linux32" if (!$flavour or $flavour eq "void"); |
| |
| my %GLOBALS; |
| my $dotinlocallabels=($flavour=~/linux/)?1:0; |
| |
| ################################################################ |
| # directives which need special treatment on different platforms |
| ################################################################ |
| my $arch = sub { |
| if ($flavour =~ /linux/) { ".arch\t".join(',',@_); } |
| else { ""; } |
| }; |
| my $globl = sub { |
| my $name = shift; |
| my $global = \$GLOBALS{$name}; |
| my $ret; |
| |
| SWITCH: for ($flavour) { |
| /ios/ && do { $name = "_$name"; |
| last; |
| }; |
| } |
| |
| $ret = ".globl $name" if (!$ret); |
| $$global = $name; |
| $ret; |
| }; |
| my $global = $globl; |
| my $extern = sub { |
| &$globl(@_); |
| return; # return nothing |
| }; |
| my $type = sub { |
| if ($flavour =~ /linux/) { ".type\t".join(',',@_); } |
| else { ""; } |
| }; |
| my $size = sub { |
| if ($flavour =~ /linux/) { ".size\t".join(',',@_); } |
| else { ""; } |
| }; |
| my $inst = sub { |
| if ($flavour =~ /linux/) { ".inst\t".join(',',@_); } |
| else { ".long\t".join(',',@_); } |
| }; |
| my $asciz = sub { |
| my $line = join(",",@_); |
| if ($line =~ /^"(.*)"$/) |
| { ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; } |
| else |
| { ""; } |
| }; |
| |
| sub range { |
| my ($r,$sfx,$start,$end) = @_; |
| |
| join(",",map("$r$_$sfx",($start..$end))); |
| } |
| |
| sub parse_args { |
| my $line = shift; |
| my @ret = (); |
| |
| pos($line)=0; |
| |
| while (1) { |
| if ($line =~ m/\G\[/gc) { |
| $line =~ m/\G([^\]]+\][^,]*)\s*/g; |
| push @ret,"[$1"; |
| } |
| elsif ($line =~ m/\G\{/gc) { |
| $line =~ m/\G([^\}]+\}[^,]*)\s*/g; |
| my $arg = $1; |
| $arg =~ s/([rdqv])([0-9]+)([^\-]*)\-\1([0-9]+)\3/range($1,$3,$2,$4)/ge; |
| push @ret,"{$arg"; |
| } |
| elsif ($line =~ m/\G([^,]+)\s*/g) { |
| push @ret,$1; |
| } |
| |
| last if ($line =~ m/\G$/gc); |
| |
| $line =~ m/\G,\s*/g; |
| } |
| |
| map {my $s=$_;$s=~s/\b(\w+)/$GLOBALS{$1} or $1/ge;$s} @ret; |
| } |
| |
| while($line=<>) { |
| |
| $line =~ s|/\*.*\*/||; # get rid of C-style comments... |
| $line =~ s|^\s+||; # ... and skip white spaces in beginning... |
| $line =~ s|\s+$||; # ... and at the end |
| |
| { |
| $line =~ s|[\b\.]L(\w+)|L$1|g; # common denominator for Locallabel |
| $line =~ s|\bL(\w+)|\.L$1|g if ($dotinlocallabels); |
| } |
| |
| { |
| $line =~ s|(^[\.\w]+)\:\s*||; |
| my $label = $1; |
| if ($label) { |
| printf "%s:",($GLOBALS{$label} or $label); |
| } |
| } |
| |
| if ($line !~ m/^#/o) { |
| $line =~ s|^\s*(\.?)(\S+)\s*||o; |
| my $c = $1; $c = "\t" if ($c eq ""); |
| my $mnemonic = $2; |
| my $opcode; |
| if ($mnemonic =~ m/([^\.]+)\.([^\.]+)/o) { |
| $opcode = eval("\$$1_$2"); |
| } else { |
| $opcode = eval("\$$mnemonic"); |
| } |
| |
| my @args=parse_args($line); |
| |
| if (ref($opcode) eq 'CODE') { |
| $line = &$opcode(@args); |
| } elsif ($mnemonic) { |
| $line = $c.$mnemonic; |
| $line.= "\t".join(',',@args) if ($#args>=0); |
| } |
| } |
| |
| print $line if ($line); |
| print "\n"; |
| } |
| |
| close STDOUT; |