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260 lines
6.1 KiB
260 lines
6.1 KiB
#!/usr/bin/env perl |
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# require 'x86asm.pl'; |
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# &asm_init(<flavor>,"des-586.pl"[,$i386only]); |
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# &function_begin("foo"); |
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# ... |
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# &function_end("foo"); |
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# &asm_finish |
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$out=(); |
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$i386=0; |
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# AUTOLOAD is this context has quite unpleasant side effect, namely |
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# that typos in function calls effectively go to assembler output, |
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# but on the pros side we don't have to implement one subroutine per |
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# each opcode... |
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sub ::AUTOLOAD |
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{ my $opcode = $AUTOLOAD; |
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die "more than 4 arguments passed to $opcode" if ($#_>3); |
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$opcode =~ s/.*:://; |
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if ($opcode =~ /^push/) { $stack+=4; } |
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elsif ($opcode =~ /^pop/) { $stack-=4; } |
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&generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD"; |
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} |
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sub ::emit |
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{ my $opcode=shift; |
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if ($#_==-1) { push(@out,"\t$opcode\n"); } |
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else { push(@out,"\t$opcode\t".join(',',@_)."\n"); } |
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} |
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sub ::LB |
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{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'"; |
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$1."l"; |
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} |
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sub ::HB |
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{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'"; |
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$1."h"; |
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} |
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sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); } |
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sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); } |
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sub ::blindpop { &pop($_[0]); $stack+=4; } |
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sub ::wparam { &DWP($stack+4*$_[0],"esp"); } |
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sub ::swtmp { &DWP(4*$_[0],"esp"); } |
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sub ::bswap |
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{ if ($i386) # emulate bswap for i386 |
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{ &comment("bswap @_"); |
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&xchg(&HB(@_),&LB(@_)); |
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&ror (@_,16); |
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&xchg(&HB(@_),&LB(@_)); |
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} |
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else |
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{ &generic("bswap",@_); } |
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} |
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# These are made-up opcodes introduced over the years essentially |
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# by ignorance, just alias them to real ones... |
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sub ::movb { &mov(@_); } |
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sub ::xorb { &xor(@_); } |
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sub ::rotl { &rol(@_); } |
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sub ::rotr { &ror(@_); } |
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sub ::exch { &xchg(@_); } |
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sub ::halt { &hlt; } |
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sub ::movz { &movzx(@_); } |
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sub ::pushf { &pushfd; } |
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sub ::popf { &popfd; } |
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# 3 argument instructions |
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sub ::movq |
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{ my($p1,$p2,$optimize)=@_; |
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if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/) |
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# movq between mmx registers can sink Intel CPUs |
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{ &::pshufw($p1,$p2,0xe4); } |
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else |
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{ &::generic("movq",@_); } |
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} |
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# SSE>2 instructions |
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my %regrm = ( "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3, |
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"esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7 ); |
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sub ::pextrd |
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{ my($dst,$src,$imm)=@_; |
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if ("$dst:$src" =~ /(e[a-dsd][ixp]):xmm([0-7])/) |
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{ &::data_byte(0x66,0x0f,0x3a,0x16,0xc0|($2<<3)|$regrm{$1},$imm); } |
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else |
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{ &::generic("pextrd",@_); } |
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} |
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sub ::pinsrd |
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{ my($dst,$src,$imm)=@_; |
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if ("$dst:$src" =~ /xmm([0-7]):(e[a-dsd][ixp])/) |
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{ &::data_byte(0x66,0x0f,0x3a,0x22,0xc0|($1<<3)|$regrm{$2},$imm); } |
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else |
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{ &::generic("pinsrd",@_); } |
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} |
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sub ::pshufb |
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{ my($dst,$src)=@_; |
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if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
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{ &data_byte(0x66,0x0f,0x38,0x00,0xc0|($1<<3)|$2); } |
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else |
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{ &::generic("pshufb",@_); } |
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} |
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sub ::palignr |
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{ my($dst,$src,$imm)=@_; |
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if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
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{ &::data_byte(0x66,0x0f,0x3a,0x0f,0xc0|($1<<3)|$2,$imm); } |
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else |
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{ &::generic("palignr",@_); } |
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} |
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sub ::pclmulqdq |
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{ my($dst,$src,$imm)=@_; |
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if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
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{ &::data_byte(0x66,0x0f,0x3a,0x44,0xc0|($1<<3)|$2,$imm); } |
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else |
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{ &::generic("pclmulqdq",@_); } |
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} |
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sub ::rdrand |
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{ my ($dst)=@_; |
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if ($dst =~ /(e[a-dsd][ixp])/) |
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{ &::data_byte(0x0f,0xc7,0xf0|$regrm{$dst}); } |
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else |
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{ &::generic("rdrand",@_); } |
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} |
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# label management |
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$lbdecor="L"; # local label decoration, set by package |
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$label="000"; |
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sub ::islabel # see is argument is a known label |
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{ my $i; |
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foreach $i (values %label) { return $i if ($i eq $_[0]); } |
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$label{$_[0]}; # can be undef |
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} |
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sub ::label # instantiate a function-scope label |
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{ if (!defined($label{$_[0]})) |
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{ $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; } |
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$label{$_[0]}; |
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} |
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sub ::LABEL # instantiate a file-scope label |
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{ $label{$_[0]}=$_[1] if (!defined($label{$_[0]})); |
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$label{$_[0]}; |
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} |
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sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); } |
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sub ::set_label_B { push(@out,"@_:\n"); } |
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sub ::set_label |
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{ my $label=&::label($_[0]); |
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&::align($_[1]) if ($_[1]>1); |
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&::set_label_B($label); |
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$label; |
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} |
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sub ::wipe_labels # wipes function-scope labels |
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{ foreach $i (keys %label) |
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{ delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); } |
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} |
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# subroutine management |
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sub ::function_begin |
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{ &function_begin_B(@_); |
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$stack=4; |
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&push("ebp"); |
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&push("ebx"); |
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&push("esi"); |
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&push("edi"); |
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} |
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sub ::function_end |
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{ &pop("edi"); |
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&pop("esi"); |
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&pop("ebx"); |
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&pop("ebp"); |
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&ret(); |
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&function_end_B(@_); |
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$stack=0; |
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&wipe_labels(); |
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} |
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sub ::function_end_A |
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{ &pop("edi"); |
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&pop("esi"); |
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&pop("ebx"); |
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&pop("ebp"); |
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&ret(); |
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$stack+=16; # readjust esp as if we didn't pop anything |
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} |
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sub ::asciz |
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{ my @str=unpack("C*",shift); |
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push @str,0; |
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while ($#str>15) { |
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&data_byte(@str[0..15]); |
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foreach (0..15) { shift @str; } |
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} |
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&data_byte(@str) if (@str); |
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} |
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sub ::asm_finish |
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{ &file_end(); |
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print @out; |
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} |
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sub ::asm_init |
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{ my ($type,$fn,$cpu)=@_; |
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$filename=$fn; |
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$i386=$cpu; |
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$elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=$android=0; |
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if (($type eq "elf")) |
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{ $elf=1; require "x86gas.pl"; } |
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elsif (($type eq "a\.out")) |
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{ $aout=1; require "x86gas.pl"; } |
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elsif (($type eq "coff" or $type eq "gaswin")) |
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{ $coff=1; require "x86gas.pl"; } |
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elsif (($type eq "win32n")) |
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{ $win32=1; require "x86nasm.pl"; } |
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elsif (($type eq "nw-nasm")) |
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{ $netware=1; require "x86nasm.pl"; } |
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#elsif (($type eq "nw-mwasm")) |
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#{ $netware=1; $mwerks=1; require "x86nasm.pl"; } |
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elsif (($type eq "win32")) |
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{ $win32=1; require "x86masm.pl"; } |
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elsif (($type eq "macosx")) |
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{ $aout=1; $macosx=1; require "x86gas.pl"; } |
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elsif (($type eq "android")) |
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{ $elf=1; $android=1; require "x86gas.pl"; } |
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else |
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{ print STDERR <<"EOF"; |
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Pick one target type from |
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elf - Linux, FreeBSD, Solaris x86, etc. |
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a.out - DJGPP, elder OpenBSD, etc. |
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coff - GAS/COFF such as Win32 targets |
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win32n - Windows 95/Windows NT NASM format |
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nw-nasm - NetWare NASM format |
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macosx - Mac OS X |
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EOF |
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exit(1); |
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} |
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$pic=0; |
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for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); } |
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$filename =~ s/\.pl$//; |
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&file($filename); |
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} |
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1;
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