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| 1 #!/usr/bin/env perl |
| 2 |
| 3 package x86masm; |
| 4 |
| 5 *out=\@::out; |
| 6 |
| 7 $::lbdecor="\$L"; # local label decoration |
| 8 $nmdecor="_"; # external name decoration |
| 9 |
| 10 $initseg=""; |
| 11 $segment=""; |
| 12 |
| 13 sub ::generic |
| 14 { my ($opcode,@arg)=@_; |
| 15 |
| 16 # fix hexadecimal constants |
| 17 for (@arg) { s/0x([0-9a-f]+)/0$1h/oi; } |
| 18 |
| 19 if ($opcode !~ /movq/) |
| 20 { # fix xmm references |
| 21 $arg[0] =~ s/\b[A-Z]+WORD\s+PTR/XMMWORD PTR/i if ($arg[1]=~/\bxmm[0-7]\b
/i); |
| 22 $arg[1] =~ s/\b[A-Z]+WORD\s+PTR/XMMWORD PTR/i if ($arg[0]=~/\bxmm[0-7]\b
/i); |
| 23 } |
| 24 |
| 25 &::emit($opcode,@arg); |
| 26 1; |
| 27 } |
| 28 # |
| 29 # opcodes not covered by ::generic above, mostly inconsistent namings... |
| 30 # |
| 31 sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } |
| 32 sub ::call_ptr { &::emit("call",@_); } |
| 33 sub ::jmp_ptr { &::emit("jmp",@_); } |
| 34 |
| 35 sub get_mem |
| 36 { my($size,$addr,$reg1,$reg2,$idx)=@_; |
| 37 my($post,$ret); |
| 38 |
| 39 $ret .= "$size PTR " if ($size ne ""); |
| 40 |
| 41 $addr =~ s/^\s+//; |
| 42 # prepend global references with optional underscore |
| 43 $addr =~ s/^([^\+\-0-9][^\+\-]*)/&::islabel($1) or "$nmdecor$1"/ige; |
| 44 # put address arithmetic expression in parenthesis |
| 45 $addr="($addr)" if ($addr =~ /^.+[\-\+].+$/); |
| 46 |
| 47 if (($addr ne "") && ($addr ne 0)) |
| 48 { if ($addr !~ /^-/) { $ret .= "$addr"; } |
| 49 else { $post=$addr; } |
| 50 } |
| 51 $ret .= "["; |
| 52 |
| 53 if ($reg2 ne "") |
| 54 { $idx!=0 or $idx=1; |
| 55 $ret .= "$reg2*$idx"; |
| 56 $ret .= "+$reg1" if ($reg1 ne ""); |
| 57 } |
| 58 else |
| 59 { $ret .= "$reg1"; } |
| 60 |
| 61 $ret .= "$post]"; |
| 62 $ret =~ s/\+\]/]/; # in case $addr was the only argument |
| 63 $ret =~ s/\[\s*\]//; |
| 64 |
| 65 $ret; |
| 66 } |
| 67 sub ::BP { &get_mem("BYTE",@_); } |
| 68 sub ::DWP { &get_mem("DWORD",@_); } |
| 69 sub ::QWP { &get_mem("QWORD",@_); } |
| 70 sub ::BC { "@_"; } |
| 71 sub ::DWC { "@_"; } |
| 72 |
| 73 sub ::file |
| 74 { my $tmp=<<___; |
| 75 TITLE $_[0].asm |
| 76 IF \@Version LT 800 |
| 77 ECHO MASM version 8.00 or later is strongly recommended. |
| 78 ENDIF |
| 79 .486 |
| 80 .MODEL FLAT |
| 81 OPTION DOTNAME |
| 82 IF \@Version LT 800 |
| 83 .text\$ SEGMENT PAGE 'CODE' |
| 84 ELSE |
| 85 .text\$ SEGMENT ALIGN(64) 'CODE' |
| 86 ENDIF |
| 87 ___ |
| 88 push(@out,$tmp); |
| 89 $segment = ".text\$"; |
| 90 } |
| 91 |
| 92 sub ::function_begin_B |
| 93 { my $func=shift; |
| 94 my $global=($func !~ /^_/); |
| 95 my $begin="${::lbdecor}_${func}_begin"; |
| 96 |
| 97 &::LABEL($func,$global?"$begin":"$nmdecor$func"); |
| 98 $func="ALIGN\t16\n".$nmdecor.$func."\tPROC"; |
| 99 |
| 100 if ($global) { $func.=" PUBLIC\n${begin}::\n"; } |
| 101 else { $func.=" PRIVATE\n"; } |
| 102 push(@out,$func); |
| 103 $::stack=4; |
| 104 } |
| 105 sub ::function_end_B |
| 106 { my $func=shift; |
| 107 |
| 108 push(@out,"$nmdecor$func ENDP\n"); |
| 109 $::stack=0; |
| 110 &::wipe_labels(); |
| 111 } |
| 112 |
| 113 sub ::file_end |
| 114 { my $xmmheader=<<___; |
| 115 .686 |
| 116 .XMM |
| 117 IF \@Version LT 800 |
| 118 XMMWORD STRUCT 16 |
| 119 DQ 2 dup (?) |
| 120 XMMWORD ENDS |
| 121 ENDIF |
| 122 ___ |
| 123 if (grep {/\b[x]?mm[0-7]\b/i} @out) { |
| 124 grep {s/\.[3-7]86/$xmmheader/} @out; |
| 125 } |
| 126 |
| 127 push(@out,"$segment ENDS\n"); |
| 128 |
| 129 if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) |
| 130 { my $comm=<<___; |
| 131 .bss SEGMENT 'BSS' |
| 132 COMM ${nmdecor}OPENSSL_ia32cap_P:DWORD |
| 133 .bss ENDS |
| 134 ___ |
| 135 # comment out OPENSSL_ia32cap_P declarations |
| 136 grep {s/(^EXTERN\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out; |
| 137 push (@out,$comm); |
| 138 } |
| 139 push (@out,$initseg) if ($initseg); |
| 140 push (@out,"END\n"); |
| 141 } |
| 142 |
| 143 sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } } |
| 144 |
| 145 *::set_label_B = sub |
| 146 { my $l=shift; push(@out,$l.($l=~/^\Q${::lbdecor}\E[0-9]{3}/?":\n":"::\n")); }; |
| 147 |
| 148 sub ::external_label |
| 149 { foreach(@_) |
| 150 { push(@out, "EXTERN\t".&::LABEL($_,$nmdecor.$_).":NEAR\n"); } |
| 151 } |
| 152 |
| 153 sub ::public_label |
| 154 { push(@out,"PUBLIC\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } |
| 155 |
| 156 sub ::data_byte |
| 157 { push(@out,("DB\t").join(',',@_)."\n"); } |
| 158 |
| 159 sub ::data_word |
| 160 { push(@out,("DD\t").join(',',@_)."\n"); } |
| 161 |
| 162 sub ::align |
| 163 { push(@out,"ALIGN\t$_[0]\n"); } |
| 164 |
| 165 sub ::picmeup |
| 166 { my($dst,$sym)=@_; |
| 167 &::lea($dst,&::DWP($sym)); |
| 168 } |
| 169 |
| 170 sub ::initseg |
| 171 { my $f=$nmdecor.shift; |
| 172 |
| 173 $initseg.=<<___; |
| 174 .CRT\$XCU SEGMENT DWORD PUBLIC 'DATA' |
| 175 EXTERN $f:NEAR |
| 176 DD $f |
| 177 .CRT\$XCU ENDS |
| 178 ___ |
| 179 } |
| 180 |
| 181 sub ::dataseg |
| 182 { push(@out,"$segment\tENDS\n_DATA\tSEGMENT\n"); $segment="_DATA"; } |
| 183 |
| 184 1; |
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