summaryrefslogtreecommitdiff
path: root/app/openssl/crypto/perlasm/x86masm.pl
blob: 3d50e4a786564c3eed9e318558ef8e656a61edc0 (plain)
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
178
179
180
181
182
183
184
#!/usr/bin/env perl

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/0x([0-9a-f]+)/0$1h/oi; }

    if ($opcode !~ /movq/)
    {	# 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 get_mem
{ my($size,$addr,$reg1,$reg2,$idx)=@_;
  my($post,$ret);

    $ret .= "$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 ::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	${nmdecor}OPENSSL_ia32cap_P:DWORD
.bss	ENDS
___
	# comment out OPENSSL_ia32cap_P declarations
	grep {s/(^EXTERN\s+${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(',',@_)."\n");	}

sub ::data_word
{   push(@out,("DD\t").join(',',@_)."\n");	}

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";   }

1;