mono/mini/genmdesc.pl

   1 #!/usr/bin/perl -w
   2
   3 # perl replacement of genmdesc.c for use when cross-compiling
   4
   5 use strict;
   6 no locale;
   7
   8 # must keep in sync with mini.h
   9 my @spec_names = qw(dest src1 src2 src3 len clob nacl);
  10 sub INST_DEST  () {return 0;}
  11 sub INST_SRC1  () {return 1;}
  12 sub INST_SRC2  () {return 2;}
  13 sub INST_SRC3  () {return 3;}
  14 sub INST_LEN   () {return 4;}
  15 sub INST_CLOB  () {return 5;}
  16 # making INST_NACL the same as INST_MAX is not a mistake,
  17 # INST_NACL writes over INST_LEN, it's not its own field
  18 sub INST_NACL  () {return 6;}
  19 sub INST_MAX   () {return 6;}
  20
  21 # this must include all the #defines used in mini-ops.h
  22 my @defines = qw (__i386__ __x86_64__ __ppc__ __powerpc__ __ppc64__ __arm__
  23         __sparc__ sparc __s390__ s390 __ia64__ __alpha__ __mips__);
  24 my %table =();
  25 my %template_table =();
  26 my @opcodes = ();
  27
  28 my $nacl = 0;
  29
  30 sub parse_file
  31 {
  32         my ($define, $file) = @_;
  33         my @enabled = (1);
  34         my $i = 0;
  35         open (OPS, $file) || die "Cannot open $file: $!";
  36         while (<OPS>) {
  37                 if (/^\s*#\s*if\s+(.*)/) {
  38                         my $defines = $1;
  39                         die "fix the genmdesc.pl cpp parser to handle all operators" if /(&&)|([!<>=])/;
  40                         unshift @enabled, scalar ($defines =~ /defined\s*\(\s*$define\s*\)/);
  41                         next;
  42                 }
  43                 if (/^\s*#\s*ifdef\s+(\S+)/) {
  44                         my $defines = $1;
  45                         unshift @enabled, $defines eq $define;
  46                         next;
  47                 }
  48                 if (/^\s*#\s*endif/) {
  49                         shift @enabled;
  50                         next;
  51                 }
  52                 next unless $enabled [0];
  53                 next unless /MINI_OP3?\s*\(\s*(\S+?)\s*,\s*"(.*?)"/;
  54                 my ($sym, $name) = ($1, $2);
  55                 push @opcodes, [$sym, $name];
  56                 $table{$name} = {num => $i, name => $name};
  57                 $i++;
  58         }
  59         close (OPS);
  60 }
  61
  62 sub load_opcodes
  63 {
  64         my ($srcdir, $arch) = @_;
  65         my $opcodes_def = "$srcdir/../cil/opcode.def";
  66         my $i = 0;
  67         my $arch_found = 0;
  68
  69         my $cpp = $ENV{"CPP"};
  70         $cpp = "cpp" unless defined $cpp;
  71         $cpp .= " -undef ";
  72         foreach (@defines) {
  73                 $cpp .= " -U$_";
  74                 $arch_found = 1 if $arch eq $_;
  75         }
  76         die "$arch arch is not supported.\n" unless $arch_found;
  77
  78         my $arch_define = $arch;
  79         if ($arch =~ "__i386__") {
  80                 $arch_define = "TARGET_X86";
  81         }
  82         if ($arch =~ "__x86_64__") {
  83                 $arch_define = "TARGET_AMD64";
  84         }
  85         if ($arch =~ "__arm__") {
  86                 $arch_define = "TARGET_ARM";
  87         }
  88
  89         parse_file ($arch_define, "$srcdir/mini-ops.h");
  90         return;
  91         $cpp .= " -D$arch_define $srcdir/mini-ops.h|";
  92         #print "Running: $cpp\n";
  93         open (OPS, $cpp) || die "Cannot execute cpp: $!";
  94         while (<OPS>) {
  95                 next unless /MINI_OP3?\s*\(\s*(\S+?)\s*,\s*"(.*?)"/;
  96                 my ($sym, $name) = ($1, $2);
  97                 push @opcodes, [$sym, $name];
  98                 $table{$name} = {num => $i, name => $name};
  99                 $i++;
 100         }
 101         close (OPS);
 102 }
 103
 104 sub load_file {
 105         my ($name) = @_;
 106         my $line = 0;
 107         my $comment = "";
 108
 109         open (DESC, $name) || die "Cannot open $name: $!";
 110         while (<DESC>) {
 111                 my $is_template = 0;
 112                 $line++;
 113                 next if /^\s*$/;
 114                 if (/^\s*(#.*)?$/) {
 115                         $comment .= "$1\n";
 116                         next;
 117                 }
 118                 my @values = split (/\s+/);
 119                 next unless ($values [0] =~ /(\S+?):/);
 120                 my $name = $1;
 121                 my $desc;
 122                 if ($name eq "template") {
 123                         $is_template = 1;
 124                         $desc = {};
 125                 } else {
 126                         $desc = $table {$name};
 127                         die "Invalid opcode $name at line $line\n" unless defined $desc;
 128                         die "Duplicated opcode $name at line $line\n" if $desc->{"desc"};
 129                 }
 130                 shift @values;
 131                 $desc->{"desc"} = $_;
 132                 $desc->{"comment"} = $comment;
 133                 $desc->{"spec"} = {};
 134                 $comment = "";
 135                 #print "values for $name: " . join (' ', @values) . " num: " . int(@values), "\n";
 136                 for my $val (@values) {
 137                         if ($val =~ /(\S+):(.*)/) {
 138                                 if ($1 eq "name") {
 139                                         die "name tag only valid in templates at line $line\n" unless $is_template;
 140                                         die "Duplicated name tag in template $desc->{'name'} at line $line\n" if defined $desc->{'name'};
 141                                         die "Duplicated template $2 at line $line\n" if defined $template_table {$2};
 142                                         $desc->{'name'} = $2;
 143                                         $template_table {$2} = $desc;
 144                                 } elsif ($1 eq "template") {
 145                                         my $tdesc = $template_table {$2};
 146                                         die "Invalid template name $2 at line $line\n" unless defined $tdesc;
 147                                         $desc->{"spec"} = {%{$tdesc->{"spec"}}};
 148                                 } else {
 149                                         $desc->{"spec"}->{$1} = $2;
 150                                 }
 151                         }
 152                 }
 153                 die "Template without name at line $1" if ($is_template && !defined ($desc->{'name'}));
 154         }
 155         close (DESC);
 156 }
 157
 158 sub build_spec {
 159         my ($spec) = shift;
 160         my %spec = %{$spec};
 161         my @vals = ();
 162         foreach (@spec_names) {
 163                 my $val = $spec->{$_};
 164                 if (defined $val) {
 165                         push @vals, $val;
 166                 } else {
 167                         push @vals, undef;
 168                 }
 169         }
 170         #print "vals: " . join (' ', @vals) . "\n";
 171         my $res = "";
 172         my $n = 0;
 173         for (my $i = 0; $i < @vals; ++$i) {
 174                 next if $i == INST_NACL;
 175                 if (defined $vals [$i]) {
 176                         if ($i == INST_LEN) {
 177                                 $n = $vals [$i];
 178                                 if ((defined $vals [INST_NACL]) and $nacl == 1){
 179                                     $n = $vals [INST_NACL];
 180                                 }
 181                                 $res .= sprintf ("\\x%x\" \"", + $n);
 182                         } else {
 183                                 if ($vals [$i] =~ /^[a-zA-Z0-9]$/) {
 184                                         $res .= $vals [$i];
 185                                 } else {
 186                                         $res .= sprintf ("\\x%x\" \"", $vals [$i]);
 187                                 }
 188                         }
 189                 } else {
 190                         $res .= "\\x0\" \"";
 191                 }
 192         }
 193         return $res;
 194 }
 195
 196 sub build_table {
 197         my ($fname, $name) = @_;
 198         my $i;
 199         my $idx;
 200         my $idx_array = "const guint16 ${name}_idx [] = {\n";
 201
 202         open (OUT, ">$fname") || die "Cannot open file $fname: $!";
 203         print OUT "/* File automatically generated by genmdesc, don't change */\n\n";
 204         print OUT "const char $name [] = {\n";
 205         print OUT "\t\"" . ("\\x0" x INST_MAX) . "\"\t/* null entry */\n";
 206         $idx = 1;
 207
 208         for ($i = 0; $i < @opcodes; ++$i) {
 209                 my $name = $opcodes [$i]->[1];
 210                 my $desc = $table {$name};
 211                 my $spec = $desc->{"spec"};
 212                 if (defined $spec) {
 213                         print OUT "\t\"";
 214                         print OUT build_spec ($spec);
 215                         print OUT "\"\t/* $name */\n";
 216                         my $pos = $idx * INST_MAX;
 217                         $idx_array .= "\t$pos,\t/* $name */\n";
 218                         ++$idx;
 219                 } else {
 220                         $idx_array .= "\t0,\t/* $name */\n";
 221                 }
 222         }
 223         print OUT "};\n\n";
 224         print OUT "$idx_array};\n\n";
 225         close (OUT);
 226 }
 227
 228 sub usage {
 229         die "genmdesc.pl arch srcdir [--nacl] output name desc [desc2 ...]\n";
 230 }
 231
 232 my $arch = shift || usage ();
 233 my $srcdir = shift || usage ();
 234 my $output = shift || usage ();
 235 if ($output eq "--nacl")
 236 {
 237   $nacl = 1;
 238   $output = shift || usage();
 239 }
 240 my $name = shift || usage ();
 241 usage () unless @ARGV;
 242 my @files = @ARGV;
 243
 244 load_opcodes ($srcdir, $arch);
 245 foreach my $file (@files) {
 246         load_file ($file);
 247 }
 248 build_table ($output, $name);
 249