| #! /usr/bin/env perl |
| # Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved. |
| # |
| # Licensed under the OpenSSL license (the "License"). You may not use |
| # this file except in compliance with the License. You can obtain a copy |
| # in the file LICENSE in the source distribution or at |
| # https://www.openssl.org/source/license.html |
| |
| |
| package x86masm; |
| |
| *out=\@::out; |
| |
| $::lbdecor="\$L"; # local label decoration |
| $nmdecor="_"; # external name decoration |
| |
| $initseg=""; |
| $segment=""; |
| |
| sub ::generic |
| { my ($opcode,@arg)=@_; |
| |
| # fix hexadecimal constants |
| for (@arg) { s/(?<![\w\$\.])0x([0-9a-f]+)/0$1h/oi; } |
| |
| if ($opcode =~ /lea/ && @arg[1] =~ s/.*PTR\s+(\(.*\))$/OFFSET $1/) # no [] |
| { $opcode="mov"; } |
| elsif ($opcode !~ /mov[dq]$/) |
| { # fix xmm references |
| $arg[0] =~ s/\b[A-Z]+WORD\s+PTR/XMMWORD PTR/i if ($arg[-1]=~/\bxmm[0-7]\b/i); |
| $arg[-1] =~ s/\b[A-Z]+WORD\s+PTR/XMMWORD PTR/i if ($arg[0]=~/\bxmm[0-7]\b/i); |
| } |
| |
| &::emit($opcode,@arg); |
| 1; |
| } |
| # |
| # opcodes not covered by ::generic above, mostly inconsistent namings... |
| # |
| sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } |
| sub ::call_ptr { &::emit("call",@_); } |
| sub ::jmp_ptr { &::emit("jmp",@_); } |
| sub ::lock { &::data_byte(0xf0); } |
| |
| sub get_mem |
| { my($size,$addr,$reg1,$reg2,$idx)=@_; |
| my($post,$ret); |
| |
| if (!defined($idx) && 1*$reg2) { $idx=$reg2; $reg2=$reg1; undef $reg1; } |
| |
| $ret .= "$size PTR " if ($size ne ""); |
| |
| $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; } |
| } |
| $ret .= "["; |
| |
| if ($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 =~ s/\[\s*\]//; |
| |
| $ret; |
| } |
| sub ::BP { &get_mem("BYTE",@_); } |
| sub ::WP { &get_mem("WORD",@_); } |
| sub ::DWP { &get_mem("DWORD",@_); } |
| sub ::QWP { &get_mem("QWORD",@_); } |
| sub ::BC { "@_"; } |
| sub ::DWC { "@_"; } |
| |
| sub ::file |
| { my $tmp=<<___; |
| TITLE $_[0].asm |
| IF \@Version LT 800 |
| ECHO MASM version 8.00 or later is strongly recommended. |
| ENDIF |
| .486 |
| .MODEL FLAT |
| OPTION DOTNAME |
| IF \@Version LT 800 |
| .text\$ SEGMENT PAGE 'CODE' |
| ELSE |
| .text\$ SEGMENT ALIGN(64) 'CODE' |
| ENDIF |
| ___ |
| push(@out,$tmp); |
| $segment = ".text\$"; |
| } |
| |
| sub ::function_begin_B |
| { my $func=shift; |
| my $global=($func !~ /^_/); |
| my $begin="${::lbdecor}_${func}_begin"; |
| |
| &::LABEL($func,$global?"$begin":"$nmdecor$func"); |
| $func="ALIGN\t16\n".$nmdecor.$func."\tPROC"; |
| |
| if ($global) { $func.=" PUBLIC\n${begin}::\n"; } |
| else { $func.=" PRIVATE\n"; } |
| push(@out,$func); |
| $::stack=4; |
| } |
| sub ::function_end_B |
| { my $func=shift; |
| |
| push(@out,"$nmdecor$func ENDP\n"); |
| $::stack=0; |
| &::wipe_labels(); |
| } |
| |
| sub ::file_end |
| { my $xmmheader=<<___; |
| .686 |
| .XMM |
| IF \@Version LT 800 |
| XMMWORD STRUCT 16 |
| DQ 2 dup (?) |
| XMMWORD ENDS |
| ENDIF |
| ___ |
| if (grep {/\b[x]?mm[0-7]\b/i} @out) { |
| grep {s/\.[3-7]86/$xmmheader/} @out; |
| } |
| |
| push(@out,"$segment ENDS\n"); |
| |
| if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) |
| { my $comm=<<___; |
| .bss SEGMENT 'BSS' |
| COMM ${nmdecor}OPENSSL_ia32cap_P:DWORD:4 |
| .bss ENDS |
| ___ |
| # comment out OPENSSL_ia32cap_P declarations |
| grep {s/(^EXTERN\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out; |
| push (@out,$comm); |
| } |
| push (@out,$initseg) if ($initseg); |
| push (@out,"END\n"); |
| } |
| |
| sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } } |
| |
| *::set_label_B = sub |
| { my $l=shift; push(@out,$l.($l=~/^\Q${::lbdecor}\E[0-9]{3}/?":\n":"::\n")); }; |
| |
| sub ::external_label |
| { foreach(@_) |
| { push(@out, "EXTERN\t".&::LABEL($_,$nmdecor.$_).":NEAR\n"); } |
| } |
| |
| sub ::public_label |
| { push(@out,"PUBLIC\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } |
| |
| sub ::data_byte |
| { push(@out,("DB\t").join(',',splice(@_,0,16))."\n") while(@_); } |
| |
| sub ::data_short |
| { push(@out,("DW\t").join(',',splice(@_,0,8))."\n") while(@_); } |
| |
| sub ::data_word |
| { push(@out,("DD\t").join(',',splice(@_,0,4))."\n") while(@_); } |
| |
| sub ::align |
| { push(@out,"ALIGN\t$_[0]\n"); } |
| |
| sub ::picmeup |
| { my($dst,$sym)=@_; |
| &::lea($dst,&::DWP($sym)); |
| } |
| |
| sub ::initseg |
| { my $f=$nmdecor.shift; |
| |
| $initseg.=<<___; |
| .CRT\$XCU SEGMENT DWORD PUBLIC 'DATA' |
| EXTERN $f:NEAR |
| DD $f |
| .CRT\$XCU ENDS |
| ___ |
| } |
| |
| sub ::dataseg |
| { push(@out,"$segment\tENDS\n_DATA\tSEGMENT\n"); $segment="_DATA"; } |
| |
| sub ::safeseh |
| { my $nm=shift; |
| push(@out,"IF \@Version GE 710\n"); |
| push(@out,".SAFESEH ".&::LABEL($nm,$nmdecor.$nm)."\n"); |
| push(@out,"ENDIF\n"); |
| } |
| |
| 1; |