9 $align=($main'aout)?"4":"16";
10 $under=($main'aout)?"_":"";
11 $com_start=($main'sol)?"/":"#";
13 sub main'asm_init_output { @out=(); }
14 sub main'asm_get_output { return(@out); }
15 sub main'get_labels { return(@labels); }
16 sub main'external_label { push(@labels,@_); }
46 %regs=( 'eax', '%eax',
69 (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
75 (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
81 local($addr,$reg1,$reg2,$idx)=@_;
84 $addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \t])/$1$under$2$3/;
85 $reg1="$regs{$reg1}" if defined($regs{$reg1});
86 $reg2="$regs{$reg2}" if defined($regs{$reg2});
87 $ret.=$addr if ($addr ne "") && ($addr ne 0);
90 if($idx ne "" && $idx != 0)
91 { $ret.="($reg1,$reg2,$idx)"; }
93 { $ret.="($reg1,$reg2)"; }
102 return(&main'DWP(@_));
117 # local($addr,$reg1,$reg2,$idx)=@_;
121 # $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
122 # $reg1="$regs{$reg1}" if defined($regs{$reg1});
123 # $reg2="$regs{$reg2}" if defined($regs{$reg2});
124 # $ret.=$addr if ($addr ne "") && ($addr ne 0);
126 # { $ret.="($reg1,$reg2,$idx)"; }
128 # { $ret.="($reg1)" }
132 sub main'mov { &out2("movl",@_); }
133 sub main'movb { &out2("movb",@_); }
134 sub main'and { &out2("andl",@_); }
135 sub main'or { &out2("orl",@_); }
136 sub main'shl { &out2("sall",@_); }
137 sub main'shr { &out2("shrl",@_); }
138 sub main'xor { &out2("xorl",@_); }
139 sub main'xorb { &out2("xorb",@_); }
140 sub main'add { &out2($_[0]=~/%[a-d][lh]/?"addb":"addl",@_); }
141 sub main'adc { &out2("adcl",@_); }
142 sub main'sub { &out2("subl",@_); }
143 sub main'rotl { &out2("roll",@_); }
144 sub main'rotr { &out2("rorl",@_); }
145 sub main'exch { &out2("xchg",@_); }
146 sub main'cmp { &out2("cmpl",@_); }
147 sub main'lea { &out2("leal",@_); }
148 sub main'mul { &out1("mull",@_); }
149 sub main'div { &out1("divl",@_); }
150 sub main'jmp { &out1("jmp",@_); }
151 sub main'jmp_ptr { &out1p("jmp",@_); }
152 sub main'je { &out1("je",@_); }
153 sub main'jle { &out1("jle",@_); }
154 sub main'jne { &out1("jne",@_); }
155 sub main'jnz { &out1("jnz",@_); }
156 sub main'jz { &out1("jz",@_); }
157 sub main'jge { &out1("jge",@_); }
158 sub main'jl { &out1("jl",@_); }
159 sub main'ja { &out1("ja",@_); }
160 sub main'jae { &out1("jae",@_); }
161 sub main'jb { &out1("jb",@_); }
162 sub main'jbe { &out1("jbe",@_); }
163 sub main'jc { &out1("jc",@_); }
164 sub main'jnc { &out1("jnc",@_); }
165 sub main'jno { &out1("jno",@_); }
166 sub main'dec { &out1("decl",@_); }
167 sub main'inc { &out1($_[0]=~/%[a-d][hl]/?"incb":"incl",@_); }
168 sub main'push { &out1("pushl",@_); $stack+=4; }
169 sub main'pop { &out1("popl",@_); $stack-=4; }
170 sub main'pushf { &out0("pushf"); $stack+=4; }
171 sub main'popf { &out0("popf"); $stack-=4; }
172 sub main'not { &out1("notl",@_); }
173 sub main'call { &out1("call",($_[0]=~/^\.L/?'':$under).$_[0]); }
174 sub main'ret { &out0("ret"); }
175 sub main'nop { &out0("nop"); }
176 sub main'movz { &out2("movzb",@_); }
178 # The bswapl instruction is new for the 486. Emulate if i386.
183 &main'comment("bswapl @_");
184 &main'exch(main'HB(@_),main'LB(@_));
186 &main'exch(main'HB(@_),main'LB(@_));
196 local($name,$p1,$p2)=@_;
198 local(%special)=( "roll",0xD1C0,"rorl",0xD1C8,
199 "rcll",0xD1D0,"rcrl",0xD1D8,
200 "shll",0xD1E0,"shrl",0xD1E8,
203 if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
205 $op=$special{$name}|$reg_val{$p1};
206 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
207 $tmp2=sprintf(".byte %d\t",$op &0xff);
213 &main'comment("$name $p2 $p1");
217 push(@out,"\t$name\t");
222 $tmp1=sprintf("\t" x $ll);
224 push(@out,&conv($p1)."\n");
231 local(%special)=("bswapl",0x0FC8);
233 if ((defined($special{$name})) && defined($regs{$p1}))
235 $op=$special{$name}|$reg_val{$p1};
236 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
237 $tmp2=sprintf(".byte %d\t",$op &0xff);
243 &main'comment("$name $p2 $p1");
247 push(@out,"\t$name\t".&conv($p1)."\n");
255 push(@out,"\t$name\t*".&conv($p1)."\n");
260 push(@out,"\t$_[0]\n");
267 # $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
269 $p=$regs{$p} if (defined($regs{$p}));
271 $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
272 $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
288 sub main'function_begin
292 &main'external_label($func);
302 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
304 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
305 else { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
306 push(@out,"$func:\n");
318 sub main'function_begin_B
320 local($func,$extra)=@_;
322 &main'external_label($func);
332 { push(@out,"\tTYPE($func,\@function)\n"); }
334 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
335 else { push(@out,"\t.type $func,\@function\n"); }
336 push(@out,"$func:\n");
340 sub main'function_end
357 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
359 { $tmp=push(@out,"\t.align 4\n"); }
360 else { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
361 push(@out,".ident \"$func\"\n");
366 sub main'function_end_A
380 sub main'function_end_B
386 push(@out,".L_${func}_end:\n");
388 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
390 { push(@out,"\t.align 4\n"); }
391 else { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
392 push(@out,".ident \"desasm.pl\"\n");
401 return(&main'DWP($stack+$num*4,"esp","",0));
408 &main'sub("esp",$num*4);
415 &main'add("esp",$num*4);
420 return(&main'DWP($_[0]*4,"esp","",0));
423 # Should use swtmp, which is above esp. Linix can trash the stack above esp
428 # return(&main'DWP(-($num+1)*4,"esp","",0));
433 if ($main'elf) # GNU and SVR4 as'es use different comment delimiters,
434 { # so we just skip comments...
443 { push(@out,"\t$com_start $_ $com_end\n"); }
449 if (!defined($label{$_[0]}))
451 $label{$_[0]}=".${label}${_[0]}";
454 return($label{$_[0]});
459 if (!defined($label{$_[0]}))
461 $label{$_[0]}=".${label}${_[0]}";
464 push(@out,".align $align\n") if ($_[1] != 0);
465 push(@out,"$label{$_[0]}:\n");
472 push(@out,".section .rodata\n");
480 push(@out,"\t.long $_[0]\n");
483 # debug output functions: puts, putx, printf
488 &main'push('$Lstring' . ++$constl);
494 $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
501 &main'push('$Lstring' . ++$constl);
502 &main'call('printf');
507 $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
514 for ($i = @_ - 1; $i >= 0; $i--)
516 if ($i == 0) # change this to support %s format strings
518 &main'push('$Lstring' . ++$constl);
519 $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
523 if ($_[$i] =~ /([0-9]*)\(%esp\)/)
525 &main'push(($1 + $stack - $ostack) . '(%esp)');
533 &main'call('printf');
535 &main'add("esp",4*@_);
561 #if (defined(ELF) || defined(SOL)) && defined(PIC)
565 addl \$_GLOBAL_OFFSET_TABLE_+[.-1b],$regs{$dst}
566 movl $sym\@GOT($regs{$dst}),$regs{$dst}
568 leal $sym,$regs{$dst}
573 elsif ($main'pic && ($main'elf || $main'aout))
575 push(@out,"\t.align\t8\n");
576 &main'call(&main'label("PIC_me_up"));
577 &main'set_label("PIC_me_up");
578 &main'blindpop($dst);
579 &main'add($dst,"\$$under"."_GLOBAL_OFFSET_TABLE_+[.-".
580 &main'label("PIC_me_up") . "]");
581 &main'mov($dst,&main'DWP($sym."\@GOT",$dst));
585 &main'lea($dst,&main'DWP($sym));
589 sub main'blindpop { &out1("popl",@_); }