crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;
   4
   5 $label="L000";
   6
   7 $align=($main'aout)?"4":"16";
   8 $under=($main'aout)?"_":"";
   9 $com_start=($main'sol)?"/":"#";
  10
  11 sub main'asm_init_output { @out=(); }
  12 sub main'asm_get_output { return(@out); }
  13 sub main'get_labels { return(@labels); }
  14 sub main'external_label { push(@labels,@_); }
  15
  16 if ($main'cpp)
  17         {
  18         $align="ALIGN";
  19         $under="";
  20         $com_start='/*';
  21         $com_end='*/';
  22         }
  23
  24 %lb=(   'eax',  '%al',
  25         'ebx',  '%bl',
  26         'ecx',  '%cl',
  27         'edx',  '%dl',
  28         'ax',   '%al',
  29         'bx',   '%bl',
  30         'cx',   '%cl',
  31         'dx',   '%dl',
  32         );
  33
  34 %hb=(   'eax',  '%ah',
  35         'ebx',  '%bh',
  36         'ecx',  '%ch',
  37         'edx',  '%dh',
  38         'ax',   '%ah',
  39         'bx',   '%bh',
  40         'cx',   '%ch',
  41         'dx',   '%dh',
  42         );
  43
  44 %regs=( 'eax',  '%eax',
  45         'ebx',  '%ebx',
  46         'ecx',  '%ecx',
  47         'edx',  '%edx',
  48         'esi',  '%esi',
  49         'edi',  '%edi',
  50         'ebp',  '%ebp',
  51         'esp',  '%esp',
  52         );
  53
  54 %reg_val=(
  55         'eax',  0x00,
  56         'ebx',  0x03,
  57         'ecx',  0x01,
  58         'edx',  0x02,
  59         'esi',  0x06,
  60         'edi',  0x07,
  61         'ebp',  0x05,
  62         'esp',  0x04,
  63         );
  64
  65 sub main'LB
  66         {
  67         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  68         return($lb{$_[0]});
  69         }
  70
  71 sub main'HB
  72         {
  73         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  74         return($hb{$_[0]});
  75         }
  76
  77 sub main'DWP
  78         {
  79         local($addr,$reg1,$reg2,$idx)=@_;
  80
  81         $ret="";
  82         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
  83         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  84         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  85         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  86         if ($reg2 ne "")
  87                 {
  88                 if($idx ne "")
  89                     { $ret.="($reg1,$reg2,$idx)"; }
  90                 else
  91                     { $ret.="($reg1,$reg2)"; }
  92                 }
  93         else
  94                 { $ret.="($reg1)" }
  95         return($ret);
  96         }
  97
  98 sub main'BP
  99         {
 100         return(&main'DWP(@_));
 101         }
 102
 103 sub main'BC
 104         {
 105         return @_;
 106         }
 107
 108 sub main'DWC
 109         {
 110         return @_;
 111         }
 112
 113 #sub main'BP
 114 #       {
 115 #       local($addr,$reg1,$reg2,$idx)=@_;
 116 #
 117 #       $ret="";
 118 #
 119 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 120 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 121 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 122 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 123 #       if ($reg2 ne "")
 124 #               { $ret.="($reg1,$reg2,$idx)"; }
 125 #       else
 126 #               { $ret.="($reg1)" }
 127 #       return($ret);
 128 #       }
 129
 130 sub main'mov    { &out2("movl",@_); }
 131 sub main'movb   { &out2("movb",@_); }
 132 sub main'and    { &out2("andl",@_); }
 133 sub main'or     { &out2("orl",@_); }
 134 sub main'shl    { &out2("sall",@_); }
 135 sub main'shr    { &out2("shrl",@_); }
 136 sub main'xor    { &out2("xorl",@_); }
 137 sub main'xorb   { &out2("xorb",@_); }
 138 sub main'add    { &out2("addl",@_); }
 139 sub main'adc    { &out2("adcl",@_); }
 140 sub main'sub    { &out2("subl",@_); }
 141 sub main'rotl   { &out2("roll",@_); }
 142 sub main'rotr   { &out2("rorl",@_); }
 143 sub main'exch   { &out2("xchg",@_); }
 144 sub main'cmp    { &out2("cmpl",@_); }
 145 sub main'lea    { &out2("leal",@_); }
 146 sub main'mul    { &out1("mull",@_); }
 147 sub main'div    { &out1("divl",@_); }
 148 sub main'jmp    { &out1("jmp",@_); }
 149 sub main'jmp_ptr { &out1p("jmp",@_); }
 150 sub main'je     { &out1("je",@_); }
 151 sub main'jle    { &out1("jle",@_); }
 152 sub main'jne    { &out1("jne",@_); }
 153 sub main'jnz    { &out1("jnz",@_); }
 154 sub main'jz     { &out1("jz",@_); }
 155 sub main'jge    { &out1("jge",@_); }
 156 sub main'jl     { &out1("jl",@_); }
 157 sub main'jb     { &out1("jb",@_); }
 158 sub main'jc     { &out1("jc",@_); }
 159 sub main'jnc    { &out1("jnc",@_); }
 160 sub main'jno    { &out1("jno",@_); }
 161 sub main'dec    { &out1("decl",@_); }
 162 sub main'inc    { &out1("incl",@_); }
 163 sub main'push   { &out1("pushl",@_); $stack+=4; }
 164 sub main'pop    { &out1("popl",@_); $stack-=4; }
 165 sub main'not    { &out1("notl",@_); }
 166 sub main'call   { &out1("call",$under.$_[0]); }
 167 sub main'ret    { &out0("ret"); }
 168 sub main'nop    { &out0("nop"); }
 169
 170 # The bswapl instruction is new for the 486. Emulate if i386.
 171 sub main'bswap
 172         {
 173         if ($main'i386)
 174                 {
 175                 &main'comment("bswapl @_");
 176                 &main'exch(main'HB(@_),main'LB(@_));
 177                 &main'rotr(@_,16);
 178                 &main'exch(main'HB(@_),main'LB(@_));
 179                 }
 180         else
 181                 {
 182                 &out1("bswapl",@_);
 183                 }
 184         }
 185
 186 sub out2
 187         {
 188         local($name,$p1,$p2)=@_;
 189         local($l,$ll,$t);
 190         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 191                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 192                                 "shll",0xD1E0,"shrl",0xD1E8,
 193                                 "sarl",0xD1F8);
 194
 195         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 196                 {
 197                 $op=$special{$name}|$reg_val{$p1};
 198                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 199                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 200                 push(@out,$tmp1);
 201                 push(@out,$tmp2);
 202
 203                 $p2=&conv($p2);
 204                 $p1=&conv($p1);
 205                 &main'comment("$name $p2 $p1");
 206                 return;
 207                 }
 208
 209         push(@out,"\t$name\t");
 210         $t=&conv($p2).",";
 211         $l=length($t);
 212         push(@out,$t);
 213         $ll=4-($l+9)/8;
 214         $tmp1=sprintf("\t" x $ll);
 215         push(@out,$tmp1);
 216         push(@out,&conv($p1)."\n");
 217         }
 218
 219 sub out1
 220         {
 221         local($name,$p1)=@_;
 222         local($l,$t);
 223         local(%special)=("bswapl",0x0FC8);
 224
 225         if ((defined($special{$name})) && defined($regs{$p1}))
 226                 {
 227                 $op=$special{$name}|$reg_val{$p1};
 228                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 229                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 230                 push(@out,$tmp1);
 231                 push(@out,$tmp2);
 232
 233                 $p2=&conv($p2);
 234                 $p1=&conv($p1);
 235                 &main'comment("$name $p2 $p1");
 236                 return;
 237                 }
 238
 239         push(@out,"\t$name\t".&conv($p1)."\n");
 240         }
 241
 242 sub out1p
 243         {
 244         local($name,$p1)=@_;
 245         local($l,$t);
 246
 247         push(@out,"\t$name\t*".&conv($p1)."\n");
 248         }
 249
 250 sub out0
 251         {
 252         push(@out,"\t$_[0]\n");
 253         }
 254
 255 sub conv
 256         {
 257         local($p)=@_;
 258
 259 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 260
 261         $p=$regs{$p} if (defined($regs{$p}));
 262
 263         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 264         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 265         return $p;
 266         }
 267
 268 sub main'file
 269         {
 270         local($file)=@_;
 271
 272         local($tmp)=<<"EOF";
 273         .file   "$file.s"
 274         .version        "01.01"
 275 gcc2_compiled.:
 276 EOF
 277         push(@out,$tmp);
 278         }
 279
 280 sub main'function_begin
 281         {
 282         local($func)=@_;
 283
 284         &main'external_label($func);
 285         $func=$under.$func;
 286
 287         local($tmp)=<<"EOF";
 288 .text
 289         .align $align
 290 .globl $func
 291 EOF
 292         push(@out,$tmp);
 293         if ($main'cpp)
 294                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 295         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 296         push(@out,"$func:\n");
 297         $tmp=<<"EOF";
 298         pushl   %ebp
 299         pushl   %ebx
 300         pushl   %esi
 301         pushl   %edi
 302
 303 EOF
 304         push(@out,$tmp);
 305         $stack=20;
 306         }
 307
 308 sub main'function_begin_B
 309         {
 310         local($func,$extra)=@_;
 311
 312         &main'external_label($func);
 313         $func=$under.$func;
 314
 315         local($tmp)=<<"EOF";
 316 .text
 317         .align $align
 318 .globl $func
 319 EOF
 320         push(@out,$tmp);
 321         if ($main'cpp)
 322                 { push(@out,"\tTYPE($func,\@function)\n"); }
 323         else    { push(@out,"\t.type    $func,\@function\n"); }
 324         push(@out,"$func:\n");
 325         $stack=4;
 326         }
 327
 328 sub main'function_end
 329         {
 330         local($func)=@_;
 331
 332         $func=$under.$func;
 333
 334         local($tmp)=<<"EOF";
 335         popl    %edi
 336         popl    %esi
 337         popl    %ebx
 338         popl    %ebp
 339         ret
 340 .${func}_end:
 341 EOF
 342         push(@out,$tmp);
 343         if ($main'cpp)
 344                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 345         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 346         push(@out,".ident       \"$func\"\n");
 347         $stack=0;
 348         %label=();
 349         }
 350
 351 sub main'function_end_A
 352         {
 353         local($func)=@_;
 354
 355         local($tmp)=<<"EOF";
 356         popl    %edi
 357         popl    %esi
 358         popl    %ebx
 359         popl    %ebp
 360         ret
 361 EOF
 362         push(@out,$tmp);
 363         }
 364
 365 sub main'function_end_B
 366         {
 367         local($func)=@_;
 368
 369         $func=$under.$func;
 370
 371         push(@out,".L_${func}_end:\n");
 372         if ($main'cpp)
 373                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 374         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 375         push(@out,".ident       \"desasm.pl\"\n");
 376         $stack=0;
 377         %label=();
 378         }
 379
 380 sub main'wparam
 381         {
 382         local($num)=@_;
 383
 384         return(&main'DWP($stack+$num*4,"esp","",0));
 385         }
 386
 387 sub main'stack_push
 388         {
 389         local($num)=@_;
 390         $stack+=$num*4;
 391         &main'sub("esp",$num*4);
 392         }
 393
 394 sub main'stack_pop
 395         {
 396         local($num)=@_;
 397         $stack-=$num*4;
 398         &main'add("esp",$num*4);
 399         }
 400
 401 sub main'swtmp
 402         {
 403         return(&main'DWP($_[0]*4,"esp","",0));
 404         }
 405
 406 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 407 #sub main'wtmp
 408 #       {
 409 #       local($num)=@_;
 410 #
 411 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 412 #       }
 413
 414 sub main'comment
 415         {
 416         foreach (@_)
 417                 {
 418                 if (/^\s*$/)
 419                         { push(@out,"\n"); }
 420                 else
 421                         { push(@out,"\t$com_start $_ $com_end\n"); }
 422                 }
 423         }
 424
 425 sub main'label
 426         {
 427         if (!defined($label{$_[0]}))
 428                 {
 429                 $label{$_[0]}=".${label}${_[0]}";
 430                 $label++;
 431                 }
 432         return($label{$_[0]});
 433         }
 434
 435 sub main'set_label
 436         {
 437         if (!defined($label{$_[0]}))
 438                 {
 439                 $label{$_[0]}=".${label}${_[0]}";
 440                 $label++;
 441                 }
 442         push(@out,".align $align\n") if ($_[1] != 0);
 443         push(@out,"$label{$_[0]}:\n");
 444         }
 445
 446 sub main'file_end
 447         {
 448         }
 449
 450 sub main'data_word
 451         {
 452         push(@out,"\t.long $_[0]\n");
 453         }