diff options
Diffstat (limited to 'openssl/crypto/perlasm/x86masm.pl')
| -rw-r--r-- | openssl/crypto/perlasm/x86masm.pl | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/openssl/crypto/perlasm/x86masm.pl b/openssl/crypto/perlasm/x86masm.pl new file mode 100644 index 000000000..3d50e4a78 --- /dev/null +++ b/openssl/crypto/perlasm/x86masm.pl @@ -0,0 +1,184 @@ +#!/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; |