1 #!/usr/bin/env perl 2 3 package x86nasm; 4 5 *out=\@::out; 6 7 $::lbdecor="L\$"; # local label decoration 8 $nmdecor=$::netware?"":"_"; # external name decoration 9 $drdecor=$::mwerks?".":""; # directive decoration 10 11 $initseg=""; 12 13 sub ::generic 14 { my $opcode=shift; 15 my $tmp; 16 17 if (!$::mwerks) 18 { if ($opcode =~ m/^j/o && $#_==0) # optimize jumps 19 { $_[0] = "NEAR $_[0]"; } 20 elsif ($opcode eq "lea" && $#_==1) # wipe storage qualifier from lea 21 { $_[1] =~ s/^[^\[]*\[/\[/o; } 22 elsif ($opcode eq "clflush" && $#_==0) 23 { $_[0] =~ s/^[^\[]*\[/\[/o; } 24 } 25 &::emit($opcode,@_); 26 1; 27 } 28 # 29 # opcodes not covered by ::generic above, mostly inconsistent namings... 30 # 31 sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } 32 sub ::call_ptr { &::emit("call",@_); } 33 sub ::jmp_ptr { &::emit("jmp",@_); } 34 35 sub get_mem 36 { my($size,$addr,$reg1,$reg2,$idx)=@_; 37 my($post,$ret); 38 39 if ($size ne "") 40 { $ret .= "$size"; 41 $ret .= " PTR" if ($::mwerks); 42 $ret .= " "; 43 } 44 $ret .= "["; 45 46 $addr =~ s/^\s+//; 47 # prepend global references with optional underscore 48 $addr =~ s/^([^\+\-0-9][^\+\-]*)/::islabel($1) or "$nmdecor$1"/ige; 49 # put address arithmetic expression in parenthesis 50 $addr="($addr)" if ($addr =~ /^.+[\-\+].+$/); 51 52 if (($addr ne "") && ($addr ne 0)) 53 { if ($addr !~ /^-/) { $ret .= "$addr+"; } 54 else { $post=$addr; } 55 } 56 57 if ($reg2 ne "") 58 { $idx!=0 or $idx=1; 59 $ret .= "$reg2*$idx"; 60 $ret .= "+$reg1" if ($reg1 ne ""); 61 } 62 else 63 { $ret .= "$reg1"; } 64 65 $ret .= "$post]"; 66 $ret =~ s/\+\]/]/; # in case $addr was the only argument 67 68 $ret; 69 } 70 sub ::BP { &get_mem("BYTE",@_); } 71 sub ::DWP { &get_mem("DWORD",@_); } 72 sub ::WP { &get_mem("WORD",@_); } 73 sub ::QWP { &get_mem("",@_); } 74 sub ::BC { (($::mwerks)?"":"BYTE ")."@_"; } 75 sub ::DWC { (($::mwerks)?"":"DWORD ")."@_"; } 76 77 sub ::file 78 { if ($::mwerks) { push(@out,".section\t.text,64\n"); } 79 else 80 { my $tmp=<<___; 81 %ifidn __OUTPUT_FORMAT__,obj 82 section code use32 class=code align=64 83 %elifidn __OUTPUT_FORMAT__,win32 84 \$\@feat.00 equ 1 85 section .text code align=64 86 %else 87 section .text code 88 %endif 89 ___ 90 push(@out,$tmp); 91 } 92 } 93 94 sub ::function_begin_B 95 { my $func=shift; 96 my $global=($func !~ /^_/); 97 my $begin="${::lbdecor}_${func}_begin"; 98 99 $begin =~ s/^\@/./ if ($::mwerks); # the torture never stops 100 101 &::LABEL($func,$global?"$begin":"$nmdecor$func"); 102 $func=$nmdecor.$func; 103 104 push(@out,"${drdecor}global $func\n") if ($global); 105 push(@out,"${drdecor}align 16\n"); 106 push(@out,"$func:\n"); 107 push(@out,"$begin:\n") if ($global); 108 $::stack=4; 109 } 110 111 sub ::function_end_B 112 { $::stack=0; 113 &::wipe_labels(); 114 } 115 116 sub ::file_end 117 { if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) 118 { my $comm=<<___; 119 ${drdecor}segment .bss 120 ${drdecor}common ${nmdecor}OPENSSL_ia32cap_P 8 121 ___ 122 # comment out OPENSSL_ia32cap_P declarations 123 grep {s/(^extern\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out; 124 push (@out,$comm) 125 } 126 push (@out,$initseg) if ($initseg); 127 } 128 129 sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } } 130 131 sub ::external_label 132 { foreach(@_) 133 { push(@out,"${drdecor}extern\t".&::LABEL($_,$nmdecor.$_)."\n"); } 134 } 135 136 sub ::public_label 137 { push(@out,"${drdecor}global\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } 138 139 sub ::data_byte 140 { push(@out,(($::mwerks)?".byte\t":"db\t").join(',',@_)."\n"); } 141 sub ::data_short 142 { push(@out,(($::mwerks)?".word\t":"dw\t").join(',',@_)."\n"); } 143 sub ::data_word 144 { push(@out,(($::mwerks)?".long\t":"dd\t").join(',',@_)."\n"); } 145 146 sub ::align 147 { push(@out,"${drdecor}align\t$_[0]\n"); } 148 149 sub ::picmeup 150 { my($dst,$sym)=@_; 151 &::lea($dst,&::DWP($sym)); 152 } 153 154 sub ::initseg 155 { my $f=$nmdecor.shift; 156 if ($::win32) 157 { $initseg=<<___; 158 segment .CRT\$XCU data align=4 159 extern $f 160 dd $f 161 ___ 162 } 163 } 164 165 sub ::dataseg 166 { if ($mwerks) { push(@out,".section\t.data,4\n"); } 167 else { push(@out,"section\t.data align=4\n"); } 168 } 169 170 sub ::safeseh 171 { my $nm=shift; 172 push(@out,"%if __NASM_VERSION_ID__ >= 0x02030000\n"); 173 push(@out,"safeseh ".&::LABEL($nm,$nmdecor.$nm)."\n"); 174 push(@out,"%endif\n"); 175 } 176 177 1; 178
