crypto/openssl-0.9.7d/crypto/perlasm/x86nasm.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86nasm;
   4
   5 $label="L000";
   6
   7 %lb=(   'eax',  'al',
   8         'ebx',  'bl',
   9         'ecx',  'cl',
  10         'edx',  'dl',
  11         'ax',   'al',
  12         'bx',   'bl',
  13         'cx',   'cl',
  14         'dx',   'dl',
  15         );
  16
  17 %hb=(   'eax',  'ah',
  18         'ebx',  'bh',
  19         'ecx',  'ch',
  20         'edx',  'dh',
  21         'ax',   'ah',
  22         'bx',   'bh',
  23         'cx',   'ch',
  24         'dx',   'dh',
  25         );
  26
  27 sub main'asm_init_output { @out=(); }
  28 sub main'asm_get_output { return(@out); }
  29 sub main'get_labels { return(@labels); }
  30
  31 sub main'external_label
  32 {
  33         push(@labels,@_);
  34         foreach (@_) {
  35                 push(@out, "extern\t_$_\n");
  36         }
  37 }
  38
  39 sub main'LB
  40         {
  41         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  42         return($lb{$_[0]});
  43         }
  44
  45 sub main'HB
  46         {
  47         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  48         return($hb{$_[0]});
  49         }
  50
  51 sub main'BP
  52         {
  53         &get_mem("BYTE",@_);
  54         }
  55
  56 sub main'DWP
  57         {
  58         &get_mem("DWORD",@_);
  59         }
  60
  61 sub main'BC
  62         {
  63         return "BYTE @_";
  64         }
  65
  66 sub main'DWC
  67         {
  68         return "DWORD @_";
  69         }
  70
  71 sub main'stack_push
  72         {
  73         my($num)=@_;
  74         $stack+=$num*4;
  75         &main'sub("esp",$num*4);
  76         }
  77
  78 sub main'stack_pop
  79         {
  80         my($num)=@_;
  81         $stack-=$num*4;
  82         &main'add("esp",$num*4);
  83         }
  84
  85 sub get_mem
  86         {
  87         my($size,$addr,$reg1,$reg2,$idx)=@_;
  88         my($t,$post);
  89         my($ret)="[";
  90         $addr =~ s/^\s+//;
  91         if ($addr =~ /^(.+)\+(.+)$/)
  92                 {
  93                 $reg2=&conv($1);
  94                 $addr="_$2";
  95                 }
  96         elsif ($addr =~ /^[_a-zA-Z]/)
  97                 {
  98                 $addr="_$addr";
  99                 }
 100
 101         if ($addr =~ /^.+\-.+$/) { $addr="($addr)"; }
 102
 103         $reg1="$regs{$reg1}" if defined($regs{$reg1});
 104         $reg2="$regs{$reg2}" if defined($regs{$reg2});
 105         if (($addr ne "") && ($addr ne 0))
 106                 {
 107                 if ($addr !~ /^-/)
 108                         { $ret.="${addr}+"; }
 109                 else    { $post=$addr; }
 110                 }
 111         if ($reg2 ne "")
 112                 {
 113                 $t="";
 114                 $t="*$idx" if ($idx != 0);
 115                 $reg1="+".$reg1 if ("$reg1$post" ne "");
 116                 $ret.="$reg2$t$reg1$post]";
 117                 }
 118         else
 119                 {
 120                 $ret.="$reg1$post]"
 121                 }
 122         $ret =~ s/\+\]/]/; # in case $addr was the only argument
 123         return($ret);
 124         }
 125
 126 sub main'mov    { &out2("mov",@_); }
 127 sub main'movb   { &out2("mov",@_); }
 128 sub main'and    { &out2("and",@_); }
 129 sub main'or     { &out2("or",@_); }
 130 sub main'shl    { &out2("shl",@_); }
 131 sub main'shr    { &out2("shr",@_); }
 132 sub main'xor    { &out2("xor",@_); }
 133 sub main'xorb   { &out2("xor",@_); }
 134 sub main'add    { &out2("add",@_); }
 135 sub main'adc    { &out2("adc",@_); }
 136 sub main'sub    { &out2("sub",@_); }
 137 sub main'rotl   { &out2("rol",@_); }
 138 sub main'rotr   { &out2("ror",@_); }
 139 sub main'exch   { &out2("xchg",@_); }
 140 sub main'cmp    { &out2("cmp",@_); }
 141 sub main'lea    { &out2("lea",@_); }
 142 sub main'mul    { &out1("mul",@_); }
 143 sub main'div    { &out1("div",@_); }
 144 sub main'dec    { &out1("dec",@_); }
 145 sub main'inc    { &out1("inc",@_); }
 146 sub main'jmp    { &out1("jmp",@_); }
 147 sub main'jmp_ptr { &out1p("jmp",@_); }
 148
 149 # This is a bit of a kludge: declare all branches as NEAR.
 150 sub main'je     { &out1("je NEAR",@_); }
 151 sub main'jle    { &out1("jle NEAR",@_); }
 152 sub main'jz     { &out1("jz NEAR",@_); }
 153 sub main'jge    { &out1("jge NEAR",@_); }
 154 sub main'jl     { &out1("jl NEAR",@_); }
 155 sub main'ja     { &out1("ja NEAR",@_); }
 156 sub main'jae    { &out1("jae NEAR",@_); }
 157 sub main'jb     { &out1("jb NEAR",@_); }
 158 sub main'jbe    { &out1("jbe NEAR",@_); }
 159 sub main'jc     { &out1("jc NEAR",@_); }
 160 sub main'jnc    { &out1("jnc NEAR",@_); }
 161 sub main'jnz    { &out1("jnz NEAR",@_); }
 162 sub main'jne    { &out1("jne NEAR",@_); }
 163 sub main'jno    { &out1("jno NEAR",@_); }
 164
 165 sub main'push   { &out1("push",@_); $stack+=4; }
 166 sub main'pop    { &out1("pop",@_); $stack-=4; }
 167 sub main'bswap  { &out1("bswap",@_); &using486(); }
 168 sub main'not    { &out1("not",@_); }
 169 sub main'call   { &out1("call",($_[0]=~/^\$L/?'':'_').$_[0]); }
 170 sub main'ret    { &out0("ret"); }
 171 sub main'nop    { &out0("nop"); }
 172
 173 sub out2
 174         {
 175         my($name,$p1,$p2)=@_;
 176         my($l,$t);
 177
 178         push(@out,"\t$name\t");
 179         $t=&conv($p1).",";
 180         $l=length($t);
 181         push(@out,$t);
 182         $l=4-($l+9)/8;
 183         push(@out,"\t" x $l);
 184         push(@out,&conv($p2));
 185         push(@out,"\n");
 186         }
 187
 188 sub out0
 189         {
 190         my($name)=@_;
 191
 192         push(@out,"\t$name\n");
 193         }
 194
 195 sub out1
 196         {
 197         my($name,$p1)=@_;
 198         my($l,$t);
 199         push(@out,"\t$name\t".&conv($p1)."\n");
 200         }
 201
 202 sub conv
 203         {
 204         my($p)=@_;
 205         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 206         return $p;
 207         }
 208
 209 sub using486
 210         {
 211         return if $using486;
 212         $using486++;
 213         grep(s/\.386/\.486/,@out);
 214         }
 215
 216 sub main'file
 217         {
 218         push(@out, "segment .text use32\n");
 219         }
 220
 221 sub main'function_begin
 222         {
 223         my($func,$extra)=@_;
 224
 225         push(@labels,$func);
 226         my($tmp)=<<"EOF";
 227 global  _$func
 228 _$func:
 229         push    ebp
 230         push    ebx
 231         push    esi
 232         push    edi
 233 EOF
 234         push(@out,$tmp);
 235         $stack=20;
 236         }
 237
 238 sub main'function_begin_B
 239         {
 240         my($func,$extra)=@_;
 241         my($tmp)=<<"EOF";
 242 global  _$func
 243 _$func:
 244 EOF
 245         push(@out,$tmp);
 246         $stack=4;
 247         }
 248
 249 sub main'function_end
 250         {
 251         my($func)=@_;
 252
 253         my($tmp)=<<"EOF";
 254         pop     edi
 255         pop     esi
 256         pop     ebx
 257         pop     ebp
 258         ret
 259 EOF
 260         push(@out,$tmp);
 261         $stack=0;
 262         %label=();
 263         }
 264
 265 sub main'function_end_B
 266         {
 267         $stack=0;
 268         %label=();
 269         }
 270
 271 sub main'function_end_A
 272         {
 273         my($func)=@_;
 274
 275         my($tmp)=<<"EOF";
 276         pop     edi
 277         pop     esi
 278         pop     ebx
 279         pop     ebp
 280         ret
 281 EOF
 282         push(@out,$tmp);
 283         }
 284
 285 sub main'file_end
 286         {
 287         }
 288
 289 sub main'wparam
 290         {
 291         my($num)=@_;
 292
 293         return(&main'DWP($stack+$num*4,"esp","",0));
 294         }
 295
 296 sub main'swtmp
 297         {
 298         return(&main'DWP($_[0]*4,"esp","",0));
 299         }
 300
 301 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 302 #sub main'wtmp
 303 #       {
 304 #       my($num)=@_;
 305 #
 306 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 307 #       }
 308
 309 sub main'comment
 310         {
 311         foreach (@_)
 312                 {
 313                 push(@out,"\t; $_\n");
 314                 }
 315         }
 316
 317 sub main'label
 318         {
 319         if (!defined($label{$_[0]}))
 320                 {
 321                 $label{$_[0]}="\$${label}${_[0]}";
 322                 $label++;
 323                 }
 324         return($label{$_[0]});
 325         }
 326
 327 sub main'set_label
 328         {
 329         if (!defined($label{$_[0]}))
 330                 {
 331                 $label{$_[0]}="\$${label}${_[0]}";
 332                 $label++;
 333                 }
 334         push(@out,"$label{$_[0]}:\n");
 335         }
 336
 337 sub main'data_word
 338         {
 339         push(@out,"\tDD\t$_[0]\n");
 340         }
 341
 342 sub out1p
 343         {
 344         my($name,$p1)=@_;
 345         my($l,$t);
 346
 347         push(@out,"\t$name\t ".&conv($p1)."\n");
 348         }
 349
 350 sub main'picmeup
 351         {
 352         local($dst,$sym)=@_;
 353         &main'lea($dst,&main'DWP($sym));
 354         }
 355
 356 sub main'blindpop { &out1("pop",@_); }