| #! /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 x86gas; |
| |
| *out=\@::out; |
| |
| $::lbdecor=$::aout?"L":".L"; # local label decoration |
| $nmdecor=($::aout or $::coff)?"_":""; # external name decoration |
| |
| $initseg=""; |
| |
| $align=16; |
| $align=log($align)/log(2) if ($::aout); |
| $com_start="#" if ($::aout or $::coff); |
| |
| sub opsize() |
| { my $reg=shift; |
| if ($reg =~ m/^%e/o) { "l"; } |
| elsif ($reg =~ m/^%[a-d][hl]$/o) { "b"; } |
| elsif ($reg =~ m/^%[yxm]/o) { undef; } |
| else { "w"; } |
| } |
| |
| # swap arguments; |
| # expand opcode with size suffix; |
| # prefix numeric constants with $; |
| sub ::generic |
| { my($opcode,@arg)=@_; |
| my($suffix,$dst,$src); |
| |
| @arg=reverse(@arg); |
| |
| for (@arg) |
| { s/^(\*?)(e?[a-dsixphl]{2})$/$1%$2/o; # gp registers |
| s/^([xy]?mm[0-7])$/%$1/o; # xmm/mmx registers |
| s/^(\-?[0-9]+)$/\$$1/o; # constants |
| s/^(\-?0x[0-9a-f]+)$/\$$1/o; # constants |
| } |
| |
| $dst = $arg[$#arg] if ($#arg>=0); |
| $src = $arg[$#arg-1] if ($#arg>=1); |
| if ($dst =~ m/^%/o) { $suffix=&opsize($dst); } |
| elsif ($src =~ m/^%/o) { $suffix=&opsize($src); } |
| else { $suffix="l"; } |
| undef $suffix if ($dst =~ m/^%[xm]/o || $src =~ m/^%[xm]/o); |
| |
| if ($#_==0) { &::emit($opcode); } |
| elsif ($#_==1 && $opcode =~ m/^(call|clflush|j|loop|set)/o) |
| { &::emit($opcode,@arg); } |
| else { &::emit($opcode.$suffix,@arg);} |
| |
| 1; |
| } |
| # |
| # opcodes not covered by ::generic above, mostly inconsistent namings... |
| # |
| sub ::movzx { &::movzb(@_); } |
| sub ::pushfd { &::pushfl; } |
| sub ::popfd { &::popfl; } |
| sub ::cpuid { &::emit(".byte\t0x0f,0xa2"); } |
| sub ::rdtsc { &::emit(".byte\t0x0f,0x31"); } |
| |
| sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } |
| sub ::call_ptr { &::generic("call","*$_[0]"); } |
| sub ::jmp_ptr { &::generic("jmp","*$_[0]"); } |
| |
| *::bswap = sub { &::emit("bswap","%$_[0]"); } if (!$::i386); |
| |
| sub ::DWP |
| { my($addr,$reg1,$reg2,$idx)=@_; |
| my $ret=""; |
| |
| if (!defined($idx) && 1*$reg2) { $idx=$reg2; $reg2=$reg1; undef $reg1; } |
| |
| $addr =~ s/^\s+//; |
| # prepend global references with optional underscore |
| $addr =~ s/^([^\+\-0-9][^\+\-]*)/&::islabel($1) or "$nmdecor$1"/ige; |
| |
| $reg1 = "%$reg1" if ($reg1); |
| $reg2 = "%$reg2" if ($reg2); |
| |
| $ret .= $addr if (($addr ne "") && ($addr ne 0)); |
| |
| if ($reg2) |
| { $idx!= 0 or $idx=1; |
| $ret .= "($reg1,$reg2,$idx)"; |
| } |
| elsif ($reg1) |
| { $ret .= "($reg1)"; } |
| |
| $ret; |
| } |
| sub ::QWP { &::DWP(@_); } |
| sub ::BP { &::DWP(@_); } |
| sub ::WP { &::DWP(@_); } |
| sub ::BC { @_; } |
| sub ::DWC { @_; } |
| |
| sub ::file |
| { push(@out,".file\t\"$_[0].S\"\n.text\n"); } |
| |
| sub ::function_begin_B |
| { my $func=shift; |
| my $global=($func !~ /^_/); |
| my $begin="${::lbdecor}_${func}_begin"; |
| |
| &::LABEL($func,$global?"$begin":"$nmdecor$func"); |
| $func=$nmdecor.$func; |
| |
| push(@out,".globl\t$func\n") if ($global); |
| if ($::macosx) { |
| push(@out,".private_extern\t$func\n"); |
| } else { |
| push(@out,".hidden\t$func\n"); |
| } |
| if ($::coff) |
| { push(@out,".def\t$func;\t.scl\t".(3-$global).";\t.type\t32;\t.endef\n"); } |
| elsif (($::aout and !$::pic) or $::macosx) |
| { } |
| else |
| { push(@out,".type $func,\@function\n"); } |
| push(@out,".align\t$align\n"); |
| push(@out,"$func:\n"); |
| push(@out,"$begin:\n") if ($global); |
| $::stack=4; |
| } |
| |
| sub ::function_end_B |
| { my $func=shift; |
| push(@out,".size\t$nmdecor$func,.-".&::LABEL($func)."\n") if ($::elf); |
| $::stack=0; |
| &::wipe_labels(); |
| } |
| |
| sub ::comment |
| { |
| if (!defined($com_start) or $::elf) |
| { # Regarding $::elf above... |
| # GNU and SVR4 as'es use different comment delimiters, |
| push(@out,"\n"); # so we just skip ELF comments... |
| return; |
| } |
| foreach (@_) |
| { |
| if (/^\s*$/) |
| { push(@out,"\n"); } |
| else |
| { push(@out,"\t$com_start $_ $com_end\n"); } |
| } |
| } |
| |
| sub ::external_label |
| { foreach(@_) { &::LABEL($_,$nmdecor.$_); } } |
| |
| sub ::public_label |
| { push(@out,".globl\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } |
| |
| sub ::file_end |
| { if ($::macosx) |
| { if (%non_lazy_ptr) |
| { push(@out,".section __IMPORT,__pointers,non_lazy_symbol_pointers\n"); |
| foreach $i (keys %non_lazy_ptr) |
| { push(@out,"$non_lazy_ptr{$i}:\n.indirect_symbol\t$i\n.long\t0\n"); } |
| } |
| } |
| if (0 && grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) { |
| my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,16"; |
| if ($::macosx) { push (@out,"$tmp,2\n"); } |
| elsif ($::elf) { push (@out,"$tmp,4\n"); } |
| else { push (@out,"$tmp\n"); } |
| } |
| push(@out,$initseg) if ($initseg); |
| } |
| |
| sub ::data_byte { push(@out,".byte\t".join(',',@_)."\n"); } |
| sub ::data_short{ push(@out,".value\t".join(',',@_)."\n"); } |
| sub ::data_word { push(@out,".long\t".join(',',@_)."\n"); } |
| |
| sub ::align |
| { my $val=$_[0]; |
| if ($::aout) |
| { $val=int(log($val)/log(2)); |
| $val.=",0x90"; |
| } |
| push(@out,".align\t$val\n"); |
| } |
| |
| sub ::picmeup |
| { my($dst,$sym,$base,$reflabel)=@_; |
| |
| if (($::pic && ($::elf || $::aout)) || $::macosx) |
| { if (!defined($base)) |
| { &::call(&::label("PIC_me_up")); |
| &::set_label("PIC_me_up"); |
| &::blindpop($dst); |
| $base=$dst; |
| $reflabel=&::label("PIC_me_up"); |
| } |
| if ($::macosx) |
| { my $indirect=&::static_label("$nmdecor$sym\$non_lazy_ptr"); |
| &::mov($dst,&::DWP("$indirect-$reflabel",$base)); |
| $non_lazy_ptr{"$nmdecor$sym"}=$indirect; |
| } |
| elsif ($sym eq "OPENSSL_ia32cap_P" && $::elf>0) |
| { &::lea($dst,&::DWP("$sym-$reflabel",$base)); } |
| else |
| { &::lea($dst,&::DWP("_GLOBAL_OFFSET_TABLE_+[.-$reflabel]", |
| $base)); |
| &::mov($dst,&::DWP("$sym\@GOT",$dst)); |
| } |
| } |
| else |
| { &::lea($dst,&::DWP($sym)); } |
| } |
| |
| sub ::initseg |
| { my $f=$nmdecor.shift; |
| |
| if ($::android) |
| { $initseg.=<<___; |
| .section .init_array |
| .align 4 |
| .long $f |
| ___ |
| } |
| elsif ($::elf) |
| { $initseg.=<<___; |
| .section .init |
| call $f |
| ___ |
| } |
| elsif ($::coff) |
| { $initseg.=<<___; # applies to both Cygwin and Mingw |
| .section .ctors |
| .long $f |
| ___ |
| } |
| elsif ($::macosx) |
| { $initseg.=<<___; |
| .mod_init_func |
| .align 2 |
| .long $f |
| ___ |
| } |
| elsif ($::aout) |
| { my $ctor="${nmdecor}_GLOBAL_\$I\$$f"; |
| $initseg.=".text\n"; |
| $initseg.=".type $ctor,\@function\n" if ($::pic); |
| $initseg.=<<___; # OpenBSD way... |
| .globl $ctor |
| .align 2 |
| $ctor: |
| jmp $f |
| ___ |
| } |
| } |
| |
| sub ::dataseg |
| { push(@out,".data\n"); } |
| |
| *::hidden = sub { push(@out,".hidden\t$nmdecor$_[0]\n"); } if ($::elf); |
| |
| 1; |