crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 # Because the bswapl instruction is not supported for old assembers
   4 # (it was a new instruction for the 486), I've added .byte xxxx code
   5 # to put it in.
   6 # eric 24-Apr-1998
   7 #
   8
   9 package x86unix;
  10
  11 $label="L000";
  12
  13 $align=($main'aout)?"4":"16";
  14 $under=($main'aout)?"_":"";
  15 $com_start=($main'sol)?"/":"#";
  16
  17 sub main'asm_init_output { @out=(); }
  18 sub main'asm_get_output { return(@out); }
  19 sub main'get_labels { return(@labels); }
  20 sub main'external_label { push(@labels,@_); }
  21
  22 if ($main'cpp)
  23         {
  24         $align="ALIGN";
  25         $under="";
  26         $com_start='/*';
  27         $com_end='*/';
  28         }
  29
  30 %lb=(   'eax',  '%al',
  31         'ebx',  '%bl',
  32         'ecx',  '%cl',
  33         'edx',  '%dl',
  34         'ax',   '%al',
  35         'bx',   '%bl',
  36         'cx',   '%cl',
  37         'dx',   '%dl',
  38         );
  39
  40 %hb=(   'eax',  '%ah',
  41         'ebx',  '%bh',
  42         'ecx',  '%ch',
  43         'edx',  '%dh',
  44         'ax',   '%ah',
  45         'bx',   '%bh',
  46         'cx',   '%ch',
  47         'dx',   '%dh',
  48         );
  49
  50 %regs=( 'eax',  '%eax',
  51         'ebx',  '%ebx',
  52         'ecx',  '%ecx',
  53         'edx',  '%edx',
  54         'esi',  '%esi',
  55         'edi',  '%edi',
  56         'ebp',  '%ebp',
  57         'esp',  '%esp',
  58         );
  59
  60 %reg_val=(
  61         'eax',  0x00,
  62         'ebx',  0x03,
  63         'ecx',  0x01,
  64         'edx',  0x02,
  65         'esi',  0x06,
  66         'edi',  0x07,
  67         'ebp',  0x05,
  68         'esp',  0x04,
  69         );
  70
  71 sub main'LB
  72         {
  73         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  74         return($lb{$_[0]});
  75         }
  76
  77 sub main'HB
  78         {
  79         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  80         return($hb{$_[0]});
  81         }
  82
  83 sub main'DWP
  84         {
  85         local($addr,$reg1,$reg2,$idx)=@_;
  86
  87         $ret="";
  88         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
  89         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  90         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  91         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  92         if ($reg2 ne "")
  93                 {
  94                 if($idx ne "")
  95                     { $ret.="($reg1,$reg2,$idx)"; }
  96                 else
  97                     { $ret.="($reg1,$reg2)"; }
  98                 }
  99         else
 100                 { $ret.="($reg1)" }
 101         return($ret);
 102         }
 103
 104 sub main'BP
 105         {
 106         return(&main'DWP(@_));
 107         }
 108
 109 #sub main'BP
 110 #       {
 111 #       local($addr,$reg1,$reg2,$idx)=@_;
 112 #
 113 #       $ret="";
 114 #
 115 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 116 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 117 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 118 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 119 #       if ($reg2 ne "")
 120 #               { $ret.="($reg1,$reg2,$idx)"; }
 121 #       else
 122 #               { $ret.="($reg1)" }
 123 #       return($ret);
 124 #       }
 125
 126 sub main'mov    { &out2("movl",@_); }
 127 sub main'movb   { &out2("movb",@_); }
 128 sub main'and    { &out2("andl",@_); }
 129 sub main'or     { &out2("orl",@_); }
 130 sub main'shl    { &out2("sall",@_); }
 131 sub main'shr    { &out2("shrl",@_); }
 132 sub main'xor    { &out2("xorl",@_); }
 133 sub main'xorb   { &out2("xorb",@_); }
 134 sub main'add    { &out2("addl",@_); }
 135 sub main'adc    { &out2("adcl",@_); }
 136 sub main'sub    { &out2("subl",@_); }
 137 sub main'rotl   { &out2("roll",@_); }
 138 sub main'rotr   { &out2("rorl",@_); }
 139 sub main'exch   { &out2("xchg",@_); }
 140 sub main'cmp    { &out2("cmpl",@_); }
 141 sub main'lea    { &out2("leal",@_); }
 142 sub main'mul    { &out1("mull",@_); }
 143 sub main'div    { &out1("divl",@_); }
 144 sub main'jmp    { &out1("jmp",@_); }
 145 sub main'jmp_ptr { &out1p("jmp",@_); }
 146 sub main'je     { &out1("je",@_); }
 147 sub main'jle    { &out1("jle",@_); }
 148 sub main'jne    { &out1("jne",@_); }
 149 sub main'jnz    { &out1("jnz",@_); }
 150 sub main'jz     { &out1("jz",@_); }
 151 sub main'jge    { &out1("jge",@_); }
 152 sub main'jl     { &out1("jl",@_); }
 153 sub main'jb     { &out1("jb",@_); }
 154 sub main'jc     { &out1("jc",@_); }
 155 sub main'jnc    { &out1("jnc",@_); }
 156 sub main'jno    { &out1("jno",@_); }
 157 sub main'dec    { &out1("decl",@_); }
 158 sub main'inc    { &out1("incl",@_); }
 159 sub main'push   { &out1("pushl",@_); $stack+=4; }
 160 sub main'pop    { &out1("popl",@_); $stack-=4; }
 161 sub main'bswap  { &out1("bswapl",@_); }
 162 sub main'not    { &out1("notl",@_); }
 163 sub main'call   { &out1("call",$under.$_[0]); }
 164 sub main'ret    { &out0("ret"); }
 165 sub main'nop    { &out0("nop"); }
 166
 167 sub out2
 168         {
 169         local($name,$p1,$p2)=@_;
 170         local($l,$ll,$t);
 171         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 172                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 173                                 "shll",0xD1E0,"shrl",0xD1E8,
 174                                 "sarl",0xD1F8);
 175
 176         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 177                 {
 178                 $op=$special{$name}|$reg_val{$p1};
 179                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 180                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 181                 push(@out,$tmp1);
 182                 push(@out,$tmp2);
 183
 184                 $p2=&conv($p2);
 185                 $p1=&conv($p1);
 186                 &main'comment("$name $p2 $p1");
 187                 return;
 188                 }
 189
 190         push(@out,"\t$name\t");
 191         $t=&conv($p2).",";
 192         $l=length($t);
 193         push(@out,$t);
 194         $ll=4-($l+9)/8;
 195         $tmp1=sprintf("\t" x $ll);
 196         push(@out,$tmp1);
 197         push(@out,&conv($p1)."\n");
 198         }
 199
 200 sub out1
 201         {
 202         local($name,$p1)=@_;
 203         local($l,$t);
 204         local(%special)=("bswapl",0x0FC8);
 205
 206         if ((defined($special{$name})) && defined($regs{$p1}))
 207                 {
 208                 $op=$special{$name}|$reg_val{$p1};
 209                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 210                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 211                 push(@out,$tmp1);
 212                 push(@out,$tmp2);
 213
 214                 $p2=&conv($p2);
 215                 $p1=&conv($p1);
 216                 &main'comment("$name $p2 $p1");
 217                 return;
 218                 }
 219
 220         push(@out,"\t$name\t".&conv($p1)."\n");
 221         }
 222
 223 sub out1p
 224         {
 225         local($name,$p1)=@_;
 226         local($l,$t);
 227
 228         push(@out,"\t$name\t*".&conv($p1)."\n");
 229         }
 230
 231 sub out0
 232         {
 233         push(@out,"\t$_[0]\n");
 234         }
 235
 236 sub conv
 237         {
 238         local($p)=@_;
 239
 240 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 241
 242         $p=$regs{$p} if (defined($regs{$p}));
 243
 244         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 245         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 246         return $p;
 247         }
 248
 249 sub main'file
 250         {
 251         local($file)=@_;
 252
 253         local($tmp)=<<"EOF";
 254         .file   "$file.s"
 255         .version        "01.01"
 256 gcc2_compiled.:
 257 EOF
 258         push(@out,$tmp);
 259         }
 260
 261 sub main'function_begin
 262         {
 263         local($func)=@_;
 264
 265         &main'external_label($func);
 266         $func=$under.$func;
 267
 268         local($tmp)=<<"EOF";
 269 .text
 270         .align $align
 271 .globl $func
 272 EOF
 273         push(@out,$tmp);
 274         if ($main'cpp)
 275                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 276         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 277         push(@out,"$func:\n");
 278         $tmp=<<"EOF";
 279         pushl   %ebp
 280         pushl   %ebx
 281         pushl   %esi
 282         pushl   %edi
 283
 284 EOF
 285         push(@out,$tmp);
 286         $stack=20;
 287         }
 288
 289 sub main'function_begin_B
 290         {
 291         local($func,$extra)=@_;
 292
 293         &main'external_label($func);
 294         $func=$under.$func;
 295
 296         local($tmp)=<<"EOF";
 297 .text
 298         .align $align
 299 .globl $func
 300 EOF
 301         push(@out,$tmp);
 302         if ($main'cpp)
 303                 { push(@out,"\tTYPE($func,\@function)\n"); }
 304         else    { push(@out,"\t.type    $func,\@function\n"); }
 305         push(@out,"$func:\n");
 306         $stack=4;
 307         }
 308
 309 sub main'function_end
 310         {
 311         local($func)=@_;
 312
 313         $func=$under.$func;
 314
 315         local($tmp)=<<"EOF";
 316         popl    %edi
 317         popl    %esi
 318         popl    %ebx
 319         popl    %ebp
 320         ret
 321 .${func}_end:
 322 EOF
 323         push(@out,$tmp);
 324         if ($main'cpp)
 325                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 326         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 327         push(@out,".ident       \"$func\"\n");
 328         $stack=0;
 329         %label=();
 330         }
 331
 332 sub main'function_end_A
 333         {
 334         local($func)=@_;
 335
 336         local($tmp)=<<"EOF";
 337         popl    %edi
 338         popl    %esi
 339         popl    %ebx
 340         popl    %ebp
 341         ret
 342 EOF
 343         push(@out,$tmp);
 344         }
 345
 346 sub main'function_end_B
 347         {
 348         local($func)=@_;
 349
 350         $func=$under.$func;
 351
 352         push(@out,".${func}_end:\n");
 353         if ($main'cpp)
 354                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 355         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 356         push(@out,".ident       \"desasm.pl\"\n");
 357         $stack=0;
 358         %label=();
 359         }
 360
 361 sub main'wparam
 362         {
 363         local($num)=@_;
 364
 365         return(&main'DWP($stack+$num*4,"esp","",0));
 366         }
 367
 368 sub main'stack_push
 369         {
 370         local($num)=@_;
 371         $stack+=$num*4;
 372         &main'sub("esp",$num*4);
 373         }
 374
 375 sub main'stack_pop
 376         {
 377         local($num)=@_;
 378         $stack-=$num*4;
 379         &main'add("esp",$num*4);
 380         }
 381
 382 sub main'swtmp
 383         {
 384         return(&main'DWP($_[0]*4,"esp","",0));
 385         }
 386
 387 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 388 #sub main'wtmp
 389 #       {
 390 #       local($num)=@_;
 391 #
 392 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 393 #       }
 394
 395 sub main'comment
 396         {
 397         foreach (@_)
 398                 {
 399                 if (/^\s*$/)
 400                         { push(@out,"\n"); }
 401                 else
 402                         { push(@out,"\t$com_start $_ $com_end\n"); }
 403                 }
 404         }
 405
 406 sub main'label
 407         {
 408         if (!defined($label{$_[0]}))
 409                 {
 410                 $label{$_[0]}=".${label}${_[0]}";
 411                 $label++;
 412                 }
 413         return($label{$_[0]});
 414         }
 415
 416 sub main'set_label
 417         {
 418         if (!defined($label{$_[0]}))
 419                 {
 420                 $label{$_[0]}=".${label}${_[0]}";
 421                 $label++;
 422                 }
 423         push(@out,".align $align\n") if ($_[1] != 0);
 424         push(@out,"$label{$_[0]}:\n");
 425         }
 426
 427 sub main'file_end
 428         {
 429         }
 430
 431 sub main'data_word
 432         {
 433         push(@out,"\t.long $_[0]\n");
 434         }