1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177
|
#!/usr/bin/env perl
package x86nasm;
*out=\@::out;
$::lbdecor="L\$"; # local label decoration
$nmdecor=$::netware?"":"_"; # external name decoration
$drdecor=$::mwerks?".":""; # directive decoration
$initseg="";
sub ::generic
{ my $opcode=shift;
my $tmp;
if (!$::mwerks)
{ if ($opcode =~ m/^j/o && $#_==0) # optimize jumps
{ $_[0] = "NEAR $_[0]"; }
elsif ($opcode eq "lea" && $#_==1) # wipe storage qualifier from lea
{ $_[1] =~ s/^[^\[]*\[/\[/o; }
elsif ($opcode eq "clflush" && $#_==0)
{ $_[0] =~ s/^[^\[]*\[/\[/o; }
}
&::emit($opcode,@_);
1;
}
#
# opcodes not covered by ::generic above, mostly inconsistent namings...
#
sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); }
sub ::call_ptr { &::emit("call",@_); }
sub ::jmp_ptr { &::emit("jmp",@_); }
sub get_mem
{ my($size,$addr,$reg1,$reg2,$idx)=@_;
my($post,$ret);
if ($size ne "")
{ $ret .= "$size";
$ret .= " PTR" if ($::mwerks);
$ret .= " ";
}
$ret .= "[";
$addr =~ s/^\s+//;
# prepend global references with optional underscore
$addr =~ s/^([^\+\-0-9][^\+\-]*)/::islabel($1) or "$nmdecor$1"/ige;
# put address arithmetic expression in parenthesis
$addr="($addr)" if ($addr =~ /^.+[\-\+].+$/);
if (($addr ne "") && ($addr ne 0))
{ if ($addr !~ /^-/) { $ret .= "$addr+"; }
else { $post=$addr; }
}
if ($reg2 ne "")
{ $idx!=0 or $idx=1;
$ret .= "$reg2*$idx";
$ret .= "+$reg1" if ($reg1 ne "");
}
else
{ $ret .= "$reg1"; }
$ret .= "$post]";
$ret =~ s/\+\]/]/; # in case $addr was the only argument
$ret;
}
sub ::BP { &get_mem("BYTE",@_); }
sub ::DWP { &get_mem("DWORD",@_); }
sub ::WP { &get_mem("WORD",@_); }
sub ::QWP { &get_mem("",@_); }
sub ::BC { (($::mwerks)?"":"BYTE ")."@_"; }
sub ::DWC { (($::mwerks)?"":"DWORD ")."@_"; }
sub ::file
{ if ($::mwerks) { push(@out,".section\t.text,64\n"); }
else
{ my $tmp=<<___;
%ifidn __OUTPUT_FORMAT__,obj
section code use32 class=code align=64
%elifidn __OUTPUT_FORMAT__,win32
\$\@feat.00 equ 1
section .text code align=64
%else
section .text code
%endif
___
push(@out,$tmp);
}
}
sub ::function_begin_B
{ my $func=shift;
my $global=($func !~ /^_/);
my $begin="${::lbdecor}_${func}_begin";
$begin =~ s/^\@/./ if ($::mwerks); # the torture never stops
&::LABEL($func,$global?"$begin":"$nmdecor$func");
$func=$nmdecor.$func;
push(@out,"${drdecor}global $func\n") if ($global);
push(@out,"${drdecor}align 16\n");
push(@out,"$func:\n");
push(@out,"$begin:\n") if ($global);
$::stack=4;
}
sub ::function_end_B
{ $::stack=0;
&::wipe_labels();
}
sub ::file_end
{ if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out)
{ my $comm=<<___;
${drdecor}segment .bss
${drdecor}common ${nmdecor}OPENSSL_ia32cap_P 8
___
# comment out OPENSSL_ia32cap_P declarations
grep {s/(^extern\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out;
push (@out,$comm)
}
push (@out,$initseg) if ($initseg);
}
sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } }
sub ::external_label
{ foreach(@_)
{ push(@out,"${drdecor}extern\t".&::LABEL($_,$nmdecor.$_)."\n"); }
}
sub ::public_label
{ push(@out,"${drdecor}global\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); }
sub ::data_byte
{ push(@out,(($::mwerks)?".byte\t":"db\t").join(',',@_)."\n"); }
sub ::data_short
{ push(@out,(($::mwerks)?".word\t":"dw\t").join(',',@_)."\n"); }
sub ::data_word
{ push(@out,(($::mwerks)?".long\t":"dd\t").join(',',@_)."\n"); }
sub ::align
{ push(@out,"${drdecor}align\t$_[0]\n"); }
sub ::picmeup
{ my($dst,$sym)=@_;
&::lea($dst,&::DWP($sym));
}
sub ::initseg
{ my $f=$nmdecor.shift;
if ($::win32)
{ $initseg=<<___;
segment .CRT\$XCU data align=4
extern $f
dd $f
___
}
}
sub ::dataseg
{ if ($mwerks) { push(@out,".section\t.data,4\n"); }
else { push(@out,"section\t.data align=4\n"); }
}
sub ::safeseh
{ my $nm=shift;
push(@out,"%if __NASM_VERSION_ID__ >= 0x02030000\n");
push(@out,"safeseh ".&::LABEL($nm,$nmdecor.$nm)."\n");
push(@out,"%endif\n");
}
1;
|