diff options
Diffstat (limited to 'openssl/crypto/perlasm/x86nasm.pl')
| -rw-r--r-- | openssl/crypto/perlasm/x86nasm.pl | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/openssl/crypto/perlasm/x86nasm.pl b/openssl/crypto/perlasm/x86nasm.pl new file mode 100644 index 00000000..ce2bed9b --- /dev/null +++ b/openssl/crypto/perlasm/x86nasm.pl @@ -0,0 +1,166 @@ +#!/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/^[^\[]*\[/\[/o; } + } + &::emit($opcode,@_); + 1; +} +# +# opcodes not covered by ::generic above, mostly inconsistent namings... +# +sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } +sub ::call_ptr { &::emit("call",@_); } +sub ::jmp_ptr { &::emit("jmp",@_); } + +sub get_mem +{ my($size,$addr,$reg1,$reg2,$idx)=@_; + my($post,$ret); + + if ($size ne "") + { $ret .= "$size"; + $ret .= " PTR" if ($::mwerks); + $ret .= " "; + } + $ret .= "["; + + $addr =~ s/^\s+//; + # prepend global references with optional underscore + $addr =~ s/^([^\+\-0-9][^\+\-]*)/::islabel($1) or "$nmdecor$1"/ige; + # put address arithmetic expression in parenthesis + $addr="($addr)" if ($addr =~ /^.+[\-\+].+$/); + + if (($addr ne "") && ($addr ne 0)) + { if ($addr !~ /^-/) { $ret .= "$addr+"; } + else { $post=$addr; } + } + + if ($reg2 ne "") + { $idx!=0 or $idx=1; + $ret .= "$reg2*$idx"; + $ret .= "+$reg1" if ($reg1 ne ""); + } + else + { $ret .= "$reg1"; } + + $ret .= "$post]"; + $ret =~ s/\+\]/]/; # in case $addr was the only argument + + $ret; +} +sub ::BP { &get_mem("BYTE",@_); } +sub ::DWP { &get_mem("DWORD",@_); } +sub ::QWP { &get_mem("",@_); } +sub ::BC { (($::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 ${nmdecor}OPENSSL_ia32cap_P 4 +___ + # comment out OPENSSL_ia32cap_P declarations + grep {s/(^extern\s+${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_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"); } +} + +1; |