10 return sub { $_[0]; };
16 return sub { $_[0] >= (2**($bits-1)) ? $_[0]-(2**$bits) : $_[0]; };
19 use constant OPCODE_E => [qw[
21 MUL_F MUL_V MUL_FV MUL_VF
25 EQ_F EQ_V EQ_S EQ_E EQ_FNC
26 NE_F NE_V NE_S NE_E NE_FNC
28 LOAD_F LOAD_V LOAD_S LOAD_ENT LOAD_FLD LOAD_FNC
30 STORE_F STORE_V STORE_S STORE_ENT STORE_FLD STORE_FNC
31 STOREP_F STOREP_V STOREP_S STOREP_ENT STOREP_FLD STOREP_FNC
33 NOT_F NOT_V NOT_S NOT_ENT NOT_FNC
35 CALL0 CALL1 CALL2 CALL3 CALL4 CALL5 CALL6 CALL7 CALL8
41 use constant ETYPE_E => [qw[
51 use constant DEF_SAVEGLOBAL => 32768;
55 return 3 if $type eq 'vector';
64 return { a => 'inglobalvec', b => 'ipoffset', isjump => 'b', isconditional => 1 };
68 return { a => 'inglobal', b => 'ipoffset', isjump => 'b', isconditional => 1 };
72 return { a => 'ipoffset', isjump => 'a', isconditional => 0 };
74 if($op =~ /^ADD_V$|^SUB_V$/)
76 return { a => 'inglobalvec', b => 'inglobalvec', c => 'outglobalvec' };
78 if($op =~ /^MUL_V$|^EQ_V$|^NE_V$/)
80 return { a => 'inglobalvec', b => 'inglobalvec', c => 'outglobal' };
84 return { a => 'inglobal', b => 'inglobalvec', c => 'outglobalvec' };
88 return { a => 'inglobalvec', b => 'inglobal', c => 'outglobalvec' };
92 return { a => 'inglobal', b => 'inglobal', c => 'outglobalvec' };
96 return { a => 'inglobalvec', c => 'outglobal' };
100 return { a => 'inglobal', c => 'outglobal' };
102 if($op eq 'STOREP_V')
104 return { a => 'inglobalvec', b => 'inglobal' };
108 return { a => 'inglobalvec', b => 'outglobalvec' };
110 if($op =~ /^STOREP_/)
112 return { a => 'inglobal', b => 'inglobal' };
116 return { a => 'inglobal', b => 'outglobal' };
120 return { a => 'inglobalfunc', iscall => 1 };
122 if($op =~ /^DONE$|^RETURN$/)
124 return { a => 'inglobalvec', isreturn => 1 };
128 return { a => 'inglobal', b => 'inglobalfunc' };
130 if($op =~ /^INVALID#/)
132 return { isinvalid => 1 };
134 return { a => 'inglobal', b => 'inglobal', c => 'outglobal' };
137 use constant TYPES => {
138 int => ['V', 4, signed 32],
139 ushort => ['v', 2, id],
140 short => ['v', 2, signed 16],
141 opcode => ['v', 2, sub { OPCODE_E->[$_[0]] or do { warn "Invalid opcode: $_[0]"; "INVALID#$_[0]"; }; }],
142 float => ['f', 4, id],
143 uchar8 => ['a8', 8, sub { [unpack 'C8', $_[0]] }],
144 global => ['i', 4, sub { { int => $_[0], float => unpack "f", pack "L", $_[0] }; }],
145 deftype => ['v', 2, sub { { type => ETYPE_E->[$_[0] & ~DEF_SAVEGLOBAL], save => !!($_[0] & DEF_SAVEGLOBAL) }; }],
148 use constant DPROGRAMS_T => [
151 [int => 'ofs_statements'],
152 [int => 'numstatements'],
153 [int => 'ofs_globaldefs'],
154 [int => 'numglobaldefs'],
155 [int => 'ofs_fielddefs'],
156 [int => 'numfielddefs'],
157 [int => 'ofs_functions'],
158 [int => 'numfunctions'],
159 [int => 'ofs_strings'],
160 [int => 'numstrings'],
161 [int => 'ofs_globals'],
162 [int => 'numglobals'],
163 [int => 'entityfields']
166 use constant DSTATEMENT_T => [
173 use constant DDEF_T => [
179 use constant DGLOBAL_T => [
183 use constant DFUNCTION_T => [
184 [int => 'first_statement'],
185 [int => 'parm_start'],
191 [uchar8 => 'parm_size'],
194 use constant LNOHEADER_T => [
197 [int => 'numglobaldefs'],
198 [int => 'numglobals'],
199 [int => 'numfielddefs'],
200 [int => 'numstatements'],
203 use constant LNO_T => [
209 my ($fh, $start, $len) = @_;
212 $len == read $fh, my $buf, $len
213 or die "short read from $start length $len (malformed progs header)";
217 sub parse_section($$$$$)
219 my ($fh, $struct, $start, $len, $cnt) = @_;
222 $itemlen += TYPES->{$_->[0]}->[1]
224 my $packspec = join '', map { TYPES->{$_->[0]}->[0]; } @$struct;
225 my @packnames = map { $_->[1]; } @$struct;
227 $len = $cnt * $itemlen
228 if not defined $len and defined $cnt;
229 $cnt = int($len / $itemlen)
230 if not defined $cnt and defined $len;
231 die "Invalid length specification"
232 unless defined $len and defined $cnt and $len == $cnt * $itemlen;
233 die "Invalid length specification in scalar context"
234 unless wantarray or $cnt == 1;
240 $itemlen == read $fh, my $buf, $itemlen
241 or die "short read from $start length $cnt * $itemlen $(malformed progs header)";
243 @h{@packnames} = unpack $packspec, $buf;
244 $h{$_->[1]} = TYPES->{$_->[0]}->[2]->($h{$_->[1]})
254 sub nfa_default_state_checker()
259 my ($ip, $state) = @_;
260 return $seen{"$ip $state"}++;
266 my ($progs, $ip, $state, $copy_handler, $state_checker, $instruction_handler) = @_;
268 my $statements = $progs->{statements};
273 no warnings 'recursion';
275 my ($ip, $state) = @_;
281 if $state_checker->($ip, $state);
283 my $s = $statements->[$ip];
284 my $c = checkop $s->{op};
286 if(($ret = $instruction_handler->($ip, $state, $s, $c)))
299 my $funcid = $progs->{globals}[$func]{v}{int};
301 if $progs->{error_func}{$funcid};
306 if($c->{isconditional})
310 if(($ret = $nfa->($ip+$s->{$c->{isjump}}, $copy_handler->($state))) < 0)
318 $nfa->($ip+1, $copy_handler->($state));
319 $ip += $s->{$c->{isjump}};
324 $ip += $s->{$c->{isjump}};
336 $nfa->($ip, $copy_handler->($state));
341 my ($progs, $g) = @_;
346 elsif($g->{int} > 0 && $g->{int} < 8388608)
348 if($g->{int} < length $progs->{strings} && $g->{int} > 0)
350 return str($progs->{getstring}->($g->{int}));
354 return $g->{int} . "i";
363 use constant PRE_MARK_STATEMENT => "";
364 use constant POST_MARK_STATEMENT => "";
365 use constant PRE_MARK_OPERAND => "*** ";
366 use constant POST_MARK_OPERAND => " ***";
368 use constant INSTRUCTION_FORMAT => "%8s %3s | %-12s ";
369 use constant OPERAND_FORMAT => "%s";
370 use constant OPERAND_SEPARATOR => ", ";
371 use constant INSTRUCTION_SEPARATOR => "\n";
376 $str =~ s/[\000-\037\\\"\177-\377]/sprintf "\\%03o", ord $&/ge;
381 my ($progs, $func, $ip) = @_;
382 my $s = $func->{debugname};
384 my $column = $progs->{cno}[$ip]{v};
385 $s =~ s/:/:$column:/;
388 my $line = $progs->{lno}[$ip]{v};
394 sub disassemble_function($$;$)
396 my ($progs, $func, $highlight) = @_;
398 print "$func->{debugname}:\n";
400 if($func->{first_statement} < 0) # builtin
402 printf INSTRUCTION_FORMAT, '', '', '.BUILTIN';
403 printf OPERAND_FORMAT, -$func->{first_statement};
404 print INSTRUCTION_SEPARATOR;
408 my $initializer = sub
411 my $g = get_constant($progs, $progs->{globals}[$ofs]{v});
416 printf INSTRUCTION_FORMAT, '', '', '.PARM_START';
417 printf OPERAND_FORMAT, "$func->{parm_start}";
418 print INSTRUCTION_SEPARATOR;
420 printf INSTRUCTION_FORMAT, '', '', '.LOCALS';
421 printf OPERAND_FORMAT, "$func->{locals}";
422 print INSTRUCTION_SEPARATOR;
424 my %override_locals = ();
425 my $p = $func->{parm_start};
426 for(0..($func->{numparms}-1))
428 $override_locals{$p} //= "argv_$_";
429 for my $comp(0..($func->{parm_size}[$_]-1))
431 $override_locals{$p} //= "argv_$_\[$comp]";
434 printf INSTRUCTION_FORMAT, '', '', '.ARG';
435 printf OPERAND_FORMAT, "argv_$_";
436 print OPERAND_SEPARATOR;
437 printf OPERAND_FORMAT, $func->{parm_size}[$_];
438 print INSTRUCTION_SEPARATOR;
440 for($func->{parm_start}..($func->{parm_start} + $func->{locals} - 1))
443 if exists $override_locals{$_};
444 $override_locals{$_} = "local_$_";
446 printf INSTRUCTION_FORMAT, '', '', '.LOCAL';
447 printf OPERAND_FORMAT, "local_$_";
449 print INSTRUCTION_SEPARATOR;
455 return $override_locals{$ofs}
456 if exists $override_locals{$ofs};
457 my $def = $progs->{globaldef_byoffset}->($ofs);
458 return $def->{debugname};
463 my ($ip, $type, $operand) = @_;
464 if($type eq 'inglobal')
466 my $name = $getname->($operand);
467 printf OPERAND_FORMAT, "$name";
469 elsif($type eq 'outglobal')
471 my $name = $getname->($operand);
472 printf OPERAND_FORMAT, "&$name";
474 elsif($type eq 'inglobalvec')
476 my $name = $getname->($operand);
477 printf OPERAND_FORMAT, "$name\[\]";
479 elsif($type eq 'outglobalvec')
481 my $name = $getname->($operand);
482 printf OPERAND_FORMAT, "&$name\[\]";
484 elsif($type eq 'inglobalfunc')
486 my $name = $getname->($operand);
487 printf OPERAND_FORMAT, "$name()";
489 elsif($type eq 'ipoffset')
491 printf OPERAND_FORMAT, "@{[$ip + $operand]}" . sprintf ' ($%+d)', $operand;
495 die "unknown type: $type";
499 my $statements = $func->{statements};
500 my $come_from = $func->{come_from};
503 for my $ip(sort { $a <=> $b } keys %$statements)
505 if($ip == $func->{first_statement})
507 printf INSTRUCTION_FORMAT, $ip, '', '.ENTRY';
508 print INSTRUCTION_SEPARATOR;
510 if(defined $ipprev && $ip != $ipprev + 1)
512 printf INSTRUCTION_FORMAT, $ip, '', '.SKIP';
513 printf OPERAND_FORMAT, $ip - $ipprev - 1;
514 print INSTRUCTION_SEPARATOR;
516 if(my $cf = $come_from->{$ip})
518 printf INSTRUCTION_FORMAT, $ip, '', '.XREF';
520 for(sort { $a <=> $b } keys %$cf)
522 print OPERAND_SEPARATOR
524 printf OPERAND_FORMAT, ($cf->{$_} ? 'c' : 'j') . $_ . sprintf ' ($%+d)', $_ - $ip;
526 print INSTRUCTION_SEPARATOR;
529 my $op = $progs->{statements}[$ip]{op};
530 my $ipt = $progs->{statements}[$ip];
531 my $opprop = checkop $op;
533 if($highlight and $highlight->{$ip})
535 for(values %{$highlight->{$ip}})
539 print PRE_MARK_STATEMENT;
540 printf INSTRUCTION_FORMAT, '', '<!>', '.WARN';
541 my $pos = debugpos $progs, $func, $ip;
542 printf OPERAND_FORMAT, "$_ (in $pos)";
543 print INSTRUCTION_SEPARATOR;
548 print PRE_MARK_STATEMENT
549 if $highlight and $highlight->{$ip};
551 my $showip = $opprop->{isjump};
552 printf INSTRUCTION_FORMAT, $showip ? $ip : '', $highlight->{$ip} ? '<!>' : '', $op;
558 if not defined $opprop->{$o};
559 print OPERAND_SEPARATOR
561 print PRE_MARK_OPERAND
562 if $highlight and $highlight->{$ip} and $highlight->{$ip}{$o};
563 $operand->($ip, $opprop->{$o}, $ipt->{$o});
564 print POST_MARK_OPERAND
565 if $highlight and $highlight->{$ip} and $highlight->{$ip}{$o};
568 print POST_MARK_STATEMENT
569 if $highlight and $highlight->{$ip};
571 print INSTRUCTION_SEPARATOR;
575 sub find_uninitialized_locals($$)
577 my ($progs, $func) = @_;
580 if $func->{first_statement} < 0; # builtin
582 print STDERR "Checking $func->{debugname}...\n";
584 my $p = $func->{parm_start};
585 for(0..($func->{numparms}-1))
587 $p += $func->{parm_size}[$_];
590 use constant WATCHME_R => 1;
591 use constant WATCHME_W => 2;
592 use constant WATCHME_X => 4;
593 use constant WATCHME_T => 8;
594 my %watchme = map { $_ => WATCHME_X } ($func->{parm_start} .. ($func->{parm_start} + $func->{locals} - 1));
596 for(keys %{$progs->{temps}})
599 if exists $watchme{$_};
600 if($progs->{temps}{$_})
603 $watchme{$_} = WATCHME_T | WATCHME_X
608 $watchme{$_} = WATCHME_X
612 $watchme{$_} |= WATCHME_R
613 for keys %{$func->{globals_read}};
614 $watchme{$_} |= WATCHME_W
615 for keys %{$func->{globals_written}};
617 my %write_places = ();
618 for my $ofs(keys %{$func->{globals_written}})
621 unless exists $watchme{$ofs} and $watchme{$ofs} & WATCHME_X;
622 for my $ip(keys %{$func->{globals_written}{$ofs}})
624 for my $op(keys %{$func->{globals_written}{$ofs}{$ip}})
626 push @{$write_places{$ip}{$op}}, $ofs;
634 if ($watchme{$_} & (WATCHME_R | WATCHME_W | WATCHME_X)) != (WATCHME_R | WATCHME_W | WATCHME_X);
638 if not keys %watchme;
643 flags => $watchme{$_},
644 valid => [0, undef, undef]
648 # mark parameters as initialized
649 for($func->{parm_start} .. ($p-1))
651 $watchme{$_}{valid} = [1, undef, undef]
652 if defined $watchme{$_};
657 run_nfa $progs, $func->{first_statement}, \%watchme,
660 return { map { $_ => { %{$h->{$_}} } } keys %$h };
663 my ($ip, $state) = @_;
665 my $s = $ip_seen{$ip};
668 # if $state is stronger or equal to $s, return 1
672 if($state->{$_}{valid}[0] < $s->{$_})
674 # The current state is LESS valid than the previously run one. We NEED to run this.
675 # The saved state can safely become the intersection [citation needed].
678 $s->{$_} = $state->{$_}{valid}[0]
679 if $state->{$_}{valid}[0] < $s->{$_};
684 # if we get here, $state is stronger or equal. No need to try it.
689 # Never seen this IP yet.
690 $ip_seen{$ip} = { map { ($_ => $state->{$_}{valid}[0]); } keys %$state };
695 my ($ip, $state, $s, $c) = @_;
698 # QCVM BUG: RETURN always takes vector, there is no float equivalent
699 my $return_hack = $c->{isreturn} // 0;
703 # COMPILER BUG of QCC: params are always copied using STORE_V
704 if($s->{b} >= 4 && $s->{b} < 28) # parameter range
712 ++$warned{$ip}{''}{"Invalid opcode"};
718 unless defined $type;
728 if not exists $state->{$ofs};
729 my $valid = $state->{$ofs}{valid};
732 # COMPILER BUG of FTEQCC: AND and OR may take uninitialized as second argument (logicops)
733 if($return_hack <= 2 and ($op ne 'OR' && $op ne 'AND' || $_ ne 'b'))
735 ++$warned{$ip}{$_}{"Use of uninitialized value"};
738 elsif($valid->[0] < 0)
740 # COMPILER BUG of FTEQCC: AND and OR may take uninitialized as second argument (logicops)
741 if($return_hack <= 2 and ($op ne 'OR' && $op ne 'AND' || $_ ne 'b'))
743 ++$warned{$ip}{$_}{"Use of temporary across CALL"};
749 if(defined $valid->[1])
751 delete $write_places{$valid->[1]}{$valid->[2]};
758 $state->{$ofs}{valid} = [1, $ip, $_]
759 if exists $state->{$ofs};
762 if($type eq 'inglobal' || $type eq 'inglobalfunc')
766 elsif($type eq 'inglobalvec')
772 elsif($type eq 'outglobal')
776 elsif($type eq 'outglobalvec')
782 elsif($type eq 'ipoffset')
784 ++$warned{$ip}{$_}{"Endless loop"}
786 ++$warned{$ip}{$_}{"No-operation jump"}
792 # builtin calls may clobber stuff
794 my $funcid = $progs->{globals}[$func]{v}{int};
795 my $funcobj = $progs->{functions}[$funcid];
796 if(!$funcobj || $funcobj->{first_statement} >= 0)
801 if($_->{flags} & WATCHME_T)
803 $_->{valid} = [-1, undef, undef];
812 for my $ip(keys %write_places)
814 for my $operand(keys %{$write_places{$ip}})
817 my %left = map { $_ => 1 } @{$write_places{$ip}{$operand}};
820 my %writeplace_seen = ();
821 run_nfa $progs, $ip+1, \%left,
828 my ($ip, $state) = @_;
829 return $writeplace_seen{"$ip " . join " ", sort keys %$state}++;
833 my ($ip, $state, $s, $c) = @_;
838 unless defined $type;
841 if($type eq 'inglobal' || $type eq 'inglobalfunc')
846 return -1; # exit TOTALLY
849 elsif($type eq 'inglobalvec')
851 if($state->{$ofs} || $state->{$ofs+1} || $state->{$ofs+2})
854 return -1; # exit TOTALLY
857 elsif($type eq 'outglobal')
859 delete $state->{$ofs};
863 elsif($type eq 'outglobalvec')
865 delete $state->{$ofs};
866 delete $state->{$ofs+1};
867 delete $state->{$ofs+2};
877 ++$warned{$ip}{$operand}{"Value is never used"};
882 disassemble_function($progs, $func, \%warned)
886 use constant DEFAULTGLOBALS => [
920 if($ofs < @{(DEFAULTGLOBALS)})
922 return { ofs => $ofs, s_name => undef, debugname => DEFAULTGLOBALS->[$ofs], type => undef };
924 return { ofs => $ofs, s_name => undef, debugname => "<undefined>\@$ofs", type => undef };
927 sub detect_constants($)
930 use constant GLOBALFLAG_R => 1; # read
931 use constant GLOBALFLAG_W => 2; # written
932 use constant GLOBALFLAG_S => 4; # saved
933 use constant GLOBALFLAG_I => 8; # initialized
934 use constant GLOBALFLAG_N => 16; # named
935 use constant GLOBALFLAG_Q => 32; # unique to function
936 use constant GLOBALFLAG_U => 64; # unused
937 use constant GLOBALFLAG_P => 128; # possibly parameter passing
938 use constant GLOBALFLAG_D => 256; # has a def
939 my @globalflags = (GLOBALFLAG_Q | GLOBALFLAG_U) x (@{$progs->{globals}} + 2);
941 for(@{$progs->{functions}})
943 for(keys %{$_->{globals_used}})
945 if($globalflags[$_] & GLOBALFLAG_U)
947 $globalflags[$_] &= ~GLOBALFLAG_U;
949 elsif($globalflags[$_] & GLOBALFLAG_Q)
951 $globalflags[$_] &= ~GLOBALFLAG_Q;
954 $globalflags[$_] |= GLOBALFLAG_R
955 for keys %{$_->{globals_read}};
956 $globalflags[$_] |= GLOBALFLAG_W
957 for keys %{$_->{globals_written}};
959 if $_->{first_statement} < 0;
960 for my $ip($_->{first_statement} .. (@{$progs->{statements}}-1))
962 my $s = $progs->{statements}[$ip];
963 if($s->{op} eq 'STORE_V')
965 $globalflags[$s->{a}] |= GLOBALFLAG_P
966 if $s->{b} >= $_->{parm_start} and $s->{b} < $_->{parm_start} + $_->{locals};
967 $globalflags[$s->{a}+1] |= GLOBALFLAG_P
968 if $s->{b}+1 >= $_->{parm_start} and $s->{b}+1 < $_->{parm_start} + $_->{locals};
969 $globalflags[$s->{a}+2] |= GLOBALFLAG_P
970 if $s->{b}+2 >= $_->{parm_start} and $s->{b}+2 < $_->{parm_start} + $_->{locals};
972 elsif($s->{op} =~ /^STORE_/)
974 $globalflags[$s->{a}] |= GLOBALFLAG_P
975 if $s->{b} >= $_->{parm_start} and $s->{b} < $_->{parm_start} + $_->{locals};
984 # parameter passing globals are only ever used in STORE_ instructions
985 for my $s(@{$progs->{statements}})
988 if $s->{op} =~ /^STORE_/;
990 my $c = checkop $s->{op};
996 unless defined $type;
999 if($type eq 'inglobal' || $type eq 'inglobalfunc' || $type eq 'outglobal')
1001 $globalflags[$ofs] &= ~GLOBALFLAG_P;
1003 if($type eq 'inglobalvec' || $type eq 'outglobalvec')
1005 $globalflags[$ofs] &= ~GLOBALFLAG_P;
1006 $globalflags[$ofs+1] &= ~GLOBALFLAG_P;
1007 $globalflags[$ofs+2] &= ~GLOBALFLAG_P;
1012 my %offsets_saved = ();
1013 for(@{$progs->{globaldefs}})
1015 my $type = $_->{type};
1016 my $name = $progs->{getstring}->($_->{s_name});
1018 if $name eq 'IMMEDIATE' or $name =~ /^\./;
1019 $_->{debugname} = $name
1021 $globalflags[$_->{ofs}] |= GLOBALFLAG_D;
1024 $globalflags[$_->{ofs}] |= GLOBALFLAG_S;
1026 if(defined $_->{debugname})
1028 $globalflags[$_->{ofs}] |= GLOBALFLAG_N;
1033 for(@{$progs->{globaldefs}})
1035 my $type = $_->{type};
1036 for my $i(1..(typesize($type->{type})-1))
1039 if(!($globalflags[$_->{ofs}+$i] & GLOBALFLAG_D))
1041 print "Missing globaldef for a component@{[defined $_->{debugname} ? ' of ' . $_->{debugname} : '']} at $_->{ofs}+$i\n";
1047 ofs => $_->{ofs} + $i,
1048 debugname => defined $_->{debugname} ? $_->{debugname} . "[$i]" : undef
1051 # "saved" and "named" states hit adjacent globals too
1052 $globalflags[$_->{ofs}+$i] |= $globalflags[$_->{ofs}] & (GLOBALFLAG_S | GLOBALFLAG_N | GLOBALFLAG_D);
1055 push @{$progs->{globaldefs}}, @extradefs;
1057 my %offsets_initialized = ();
1058 for(0..(@{$progs->{globals}}-1))
1060 if($progs->{globals}[$_]{v}{int})
1062 $globalflags[$_] |= GLOBALFLAG_I;
1066 my @globaltypes = (undef) x @{$progs->{globals}};
1069 for(0..(@{$progs->{globals}}-1))
1072 if $_ < @{(DEFAULTGLOBALS)};
1073 if(($globalflags[$_] & (GLOBALFLAG_R | GLOBALFLAG_W)) == 0)
1075 $globaltypes[$_] = "unused";
1077 elsif(($globalflags[$_] & (GLOBALFLAG_R | GLOBALFLAG_W)) == GLOBALFLAG_R)
1080 if(($globalflags[$_] & GLOBALFLAG_N) == GLOBALFLAG_N)
1082 $globaltypes[$_] = "read_only";
1084 elsif(($globalflags[$_] & GLOBALFLAG_S) == 0)
1086 $globaltypes[$_] = "const";
1090 $globaltypes[$_] = "read_only";
1093 elsif(($globalflags[$_] & (GLOBALFLAG_R | GLOBALFLAG_W)) == GLOBALFLAG_W)
1095 $globaltypes[$_] = "write_only";
1099 # now we know it is rw
1100 if(($globalflags[$_] & GLOBALFLAG_N) == GLOBALFLAG_N)
1102 $globaltypes[$_] = "global";
1104 elsif(($globalflags[$_] & (GLOBALFLAG_S | GLOBALFLAG_I)) == 0)
1106 if($globalflags[$_] & GLOBALFLAG_P)
1108 $globaltypes[$_] = "OFS_PARM";
1110 elsif($globalflags[$_] & GLOBALFLAG_Q)
1112 $globaltypes[$_] = "uniquetemp";
1117 $globaltypes[$_] = "temp";
1121 elsif(($globalflags[$_] & (GLOBALFLAG_S | GLOBALFLAG_I)) == GLOBALFLAG_I)
1123 $globaltypes[$_] = "not_saved";
1127 $globaltypes[$_] = "global";
1131 $progs->{temps} = \%istemp;
1134 my @globaldefs = (undef) x @{$progs->{globals}};
1135 for(@{$progs->{globaldefs}})
1137 $globaldefs[$_->{ofs}] //= $_
1138 if defined $_->{debugname};
1140 for(@{$progs->{globaldefs}})
1142 $globaldefs[$_->{ofs}] //= $_;
1144 for(0..(@{$progs->{globals}}-1))
1146 $globaldefs[$_] //= {
1153 for(0..(@{(DEFAULTGLOBALS)}-1))
1155 $globaldefs[$_] = { ofs => $_, s_name => undef, debugname => DEFAULTGLOBALS->[$_], type => undef };
1156 $globaltypes[$_] = 'defglobal';
1158 my %globaldefs_namecount = ();
1161 $_->{globaltype} = $globaltypes[$_->{ofs}];
1162 if(defined $_->{debugname})
1164 # already has debugname
1166 elsif($_->{globaltype} eq 'const')
1168 $_->{debugname} = get_constant($progs, $progs->{globals}[$_->{ofs}]{v});
1172 $_->{debugname} = "$_->{globaltype}_$_->{ofs}";
1174 ++$globaldefs_namecount{$_->{debugname}};
1179 if $globaldefs_namecount{$_->{debugname}} <= 1 && !$ENV{FORCE_OFFSETS};
1180 #print "Not unique: $_->{debugname} at $_->{ofs}\n";
1181 $_->{debugname} .= "\@$_->{ofs}";
1183 $progs->{globaldef_byoffset} = sub
1186 my $def = $globaldefs[$ofs];
1193 my ($fh, $lnofh) = @_;
1197 print STDERR "Parsing header...\n";
1198 $p{header} = parse_section $fh, DPROGRAMS_T, 0, undef, 1;
1200 if (defined $lnofh) {
1201 print STDERR "Parsing LNO...\n";
1202 my $lnoheader = parse_section $lnofh, LNOHEADER_T, 0, undef, 1;
1205 if $lnoheader->{lnotype} != unpack 'V', 'LNOF';
1207 if $lnoheader->{version} != 1;
1208 die "Not same count of globaldefs"
1209 if $lnoheader->{numglobaldefs} != $p{header}{numglobaldefs};
1210 die "Not same count of globals"
1211 if $lnoheader->{numglobals} != $p{header}{numglobals};
1212 die "Not same count of fielddefs"
1213 if $lnoheader->{numfielddefs} != $p{header}{numfielddefs};
1214 die "Not same count of statements"
1215 if $lnoheader->{numstatements} != $p{header}{numstatements};
1216 $p{lno} = [parse_section $lnofh, LNO_T, 24, undef, $lnoheader->{numstatements}];
1218 $p{lno} = [parse_section $lnofh, LNO_T, 24, undef, $lnoheader->{numstatements} * 2];
1219 $p{cno} = [splice $p{lno}, $lnoheader->{numstatements}];
1220 print STDERR "Cool, this LNO even has column number info!\n";
1222 } or warn "Skipping LNO: $@";
1225 print STDERR "Parsing strings...\n";
1226 $p{strings} = get_section $fh, $p{header}{ofs_strings}, $p{header}{numstrings};
1229 my ($startpos) = @_;
1230 my $endpos = index $p{strings}, "\0", $startpos;
1231 return substr $p{strings}, $startpos, $endpos - $startpos;
1234 print STDERR "Parsing globals...\n";
1235 $p{globals} = [parse_section $fh, DGLOBAL_T, $p{header}{ofs_globals}, undef, $p{header}{numglobals}];
1237 print STDERR "Parsing globaldefs...\n";
1238 $p{globaldefs} = [parse_section $fh, DDEF_T, $p{header}{ofs_globaldefs}, undef, $p{header}{numglobaldefs}];
1240 print STDERR "Range checking globaldefs...\n";
1241 for(0 .. (@{$p{globaldefs}}-1))
1243 my $g = $p{globaldefs}[$_];
1244 die "Out of range name in globaldef $_"
1245 if $g->{s_name} < 0 || $g->{s_name} >= length $p{strings};
1246 my $name = $p{getstring}->($g->{s_name});
1247 die "Out of range ofs $g->{ofs} in globaldef $_ (name: \"$name\")"
1248 if $g->{ofs} >= $p{globals};
1251 print STDERR "Parsing fielddefs...\n";
1252 $p{fielddefs} = [parse_section $fh, DDEF_T, $p{header}{ofs_fielddefs}, undef, $p{header}{numfielddefs}];
1254 print STDERR "Range checking fielddefs...\n";
1255 for(0 .. (@{$p{fielddefs}}-1))
1257 my $g = $p{fielddefs}[$_];
1258 die "Out of range name in fielddef $_"
1259 if $g->{s_name} < 0 || $g->{s_name} >= length $p{strings};
1260 my $name = $p{getstring}->($g->{s_name});
1261 die "Out of range ofs $g->{ofs} in fielddef $_ (name: \"$name\")"
1262 if $g->{ofs} >= $p{header}{entityfields};
1265 print STDERR "Parsing statements...\n";
1266 $p{statements} = [parse_section $fh, DSTATEMENT_T, $p{header}{ofs_statements}, undef, $p{header}{numstatements}];
1268 print STDERR "Parsing functions...\n";
1269 $p{functions} = [parse_section $fh, DFUNCTION_T, $p{header}{ofs_functions}, undef, $p{header}{numfunctions}];
1271 print STDERR "Range checking functions...\n";
1272 for(0 .. (@{$p{functions}} - 1))
1274 my $f = $p{functions}[$_];
1275 die "Out of range name in function $_"
1276 if $f->{s_name} < 0 || $f->{s_name} >= length $p{strings};
1277 my $name = $p{getstring}->($f->{s_name});
1278 die "Out of range file in function $_"
1279 if $f->{s_file} < 0 || $f->{s_file} >= length $p{strings};
1280 my $file = $p{getstring}->($f->{s_file});
1281 die "Out of range first_statement in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1282 if $f->{first_statement} >= @{$p{statements}};
1283 if($f->{first_statement} >= 0)
1285 die "Out of range parm_start in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1286 if $f->{parm_start} < 0 || $f->{parm_start} >= @{$p{globals}};
1287 die "Out of range locals in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1288 if $f->{locals} < 0 || $f->{parm_start} + $f->{locals} > @{$p{globals}};
1289 die "Out of range numparms $f->{numparms} in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1290 if $f->{numparms} < 0 || $f->{numparms} > 8;
1292 for(0..($f->{numparms}-1))
1294 die "Out of range parm_size[$_] in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1295 unless { 0 => 1, 1 => 1, 3 => 1 }->{$f->{parm_size}[$_]};
1296 $totalparms += $f->{parm_size}[$_];
1298 die "Out of range parms in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1299 if $f->{parm_start} + $totalparms > @{$p{globals}};
1300 die "More parms than locals in function $_ (name: \"$name\", file: \"$file\", first statement: $f->{first_statement})"
1301 if $totalparms > $f->{locals};
1305 print STDERR "Range checking statements...\n";
1306 for my $ip(0 .. (@{$p{statements}}-1))
1308 my $s = $p{statements}[$ip];
1309 my $c = checkop $s->{op};
1313 my $type = $c->{$_};
1315 unless defined $type;
1317 if($type eq 'inglobal' || $type eq 'inglobalfunc')
1320 die "Out of range global offset in statement $ip - cannot continue"
1321 if $s->{$_} >= @{$p{globals}};
1323 elsif($type eq 'inglobalvec')
1328 die "Out of range global offset in statement $ip - cannot continue"
1329 if $s->{$_} >= @{$p{globals}};
1330 print "Potentially out of range global offset in statement $ip - may crash engines"
1331 if $s->{$_} >= @{$p{globals}}-2;
1335 die "Out of range global offset in statement $ip - cannot continue"
1336 if $s->{$_} >= @{$p{globals}}-2;
1339 elsif($type eq 'outglobal')
1342 die "Out of range global offset in statement $ip - cannot continue"
1343 if $s->{$_} >= @{$p{globals}};
1345 elsif($type eq 'outglobalvec')
1348 die "Out of range global offset in statement $ip - cannot continue"
1349 if $s->{$_} >= @{$p{globals}}-2;
1351 elsif($type eq 'ipoffset')
1353 die "Out of range GOTO/IF/IFNOT in statement $ip - cannot continue"
1354 if $ip + $s->{$_} < 0 || $ip + $s->{$_} >= @{$p{statements}};
1359 print STDERR "Looking for error()...\n";
1360 $p{error_func} = {};
1361 for(@{$p{globaldefs}})
1364 if $p{getstring}($_->{s_name}) ne 'error';
1365 my $v = $p{globals}[$_->{ofs}]{v}{int};
1367 if $v <= 0 || $v >= @{$p{functions}};
1368 my $first = $p{functions}[$v]{first_statement};
1371 print STDERR "Detected error() at offset $_->{ofs} (builtin #@{[-$first]})\n";
1372 $p{error_func}{$_->{ofs}} = 1;
1375 print STDERR "Scanning functions...\n";
1376 for(@{$p{functions}})
1378 my $file = $p{getstring}->($_->{s_file});
1379 my $name = $p{getstring}->($_->{s_name});
1380 $name = "$file:$name"
1382 $_->{debugname} = $name;
1385 if $_->{first_statement} < 0;
1387 my %statements = ();
1390 my %globals_read = ();
1391 my %globals_written = ();
1392 my %globals_used = ();
1394 if($_->{first_statement} >= 0)
1396 run_nfa \%p, $_->{first_statement}, "", id, nfa_default_state_checker,
1399 my ($ip, $state, $s, $c) = @_;
1402 if(my $j = $c->{isjump})
1404 my $t = $ip + $s->{$j};
1405 $come_from{$t}{$ip} = $c->{isconditional};
1406 $go_to{$ip}{$t} = $c->{isconditional};
1409 for my $o(qw(a b c))
1418 $globals_read{$ofs}{$ip}{$o} = 1;
1419 $globals_used{$ofs} = 1;
1424 $globals_written{$ofs}{$ip}{$o} = 1;
1425 $globals_used{$ofs} = 1;
1428 if($type eq 'inglobal' || $type eq 'inglobalfunc')
1432 elsif($type eq 'inglobalvec')
1438 elsif($type eq 'outglobal')
1442 elsif($type eq 'outglobalvec')
1454 $_->{statements} = \%statements;
1455 $_->{come_from} = \%come_from;
1456 $_->{go_to} = \%go_to;
1457 $_->{globals_read} = \%globals_read;
1458 $_->{globals_written} = \%globals_written;
1459 $_->{globals_used} = \%globals_used;
1461 # using this info, we could now identify basic blocks
1464 print STDERR "Detecting constants and temps, and naming...\n";
1465 detect_constants \%p;
1474 # what do we want to do?
1475 my $checkfunc = \&find_uninitialized_locals;
1476 if($ENV{DISASSEMBLE})
1478 $checkfunc = \&disassemble_function;
1480 for(sort { $a->{debugname} cmp $b->{debugname} } @{$p{functions}})
1482 $checkfunc->(\%p, $_);
1486 for my $progs (@ARGV) {
1487 my $lno = "$progs.lno";
1488 $lno =~ s/\.dat\.lno$/.lno/;
1490 open my $fh, '<', $progs
1491 or die "$progs: $!";
1493 open my $lnofh, '<', $lno
1496 parse_progs $fh, $lnofh;