1#! /usr/bin/env perl 2# Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved. 3# 4# Licensed under the Apache License 2.0 (the "License"). You may not use 5# this file except in compliance with the License. You can obtain a copy 6# in the file LICENSE in the source distribution or at 7# https://www.openssl.org/source/license.html 8 9 10package x86nasm; 11 12*out=\@::out; 13 14$::lbdecor="L\$"; # local label decoration 15$nmdecor="_"; # external name decoration 16$drdecor=$::mwerks?".":""; # directive decoration 17 18$initseg=""; 19 20sub ::generic 21{ my $opcode=shift; 22 my $tmp; 23 24 if (!$::mwerks) 25 { if ($opcode =~ m/^j/o && $#_==0) # optimize jumps 26 { $_[0] = "NEAR $_[0]"; } 27 elsif ($opcode eq "lea" && $#_==1) # wipe storage qualifier from lea 28 { $_[1] =~ s/^[^\[]*\[/\[/o; } 29 elsif ($opcode eq "clflush" && $#_==0) 30 { $_[0] =~ s/^[^\[]*\[/\[/o; } 31 } 32 &::emit($opcode,@_); 33 1; 34} 35# 36# opcodes not covered by ::generic above, mostly inconsistent namings... 37# 38sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } 39sub ::call_ptr { &::emit("call",@_); } 40sub ::jmp_ptr { &::emit("jmp",@_); } 41 42sub get_mem 43{ my($size,$addr,$reg1,$reg2,$idx)=@_; 44 my($post,$ret); 45 46 if (!defined($idx) && 1*$reg2) { $idx=$reg2; $reg2=$reg1; undef $reg1; } 47 48 if ($size ne "") 49 { $ret .= "$size"; 50 $ret .= " PTR" if ($::mwerks); 51 $ret .= " "; 52 } 53 $ret .= "["; 54 55 $addr =~ s/^\s+//; 56 # prepend global references with optional underscore 57 $addr =~ s/^([^\+\-0-9][^\+\-]*)/::islabel($1) or "$nmdecor$1"/ige; 58 # put address arithmetic expression in parenthesis 59 $addr="($addr)" if ($addr =~ /^.+[\-\+].+$/); 60 61 if (($addr ne "") && ($addr ne 0)) 62 { if ($addr !~ /^-/) { $ret .= "$addr+"; } 63 else { $post=$addr; } 64 } 65 66 if ($reg2 ne "") 67 { $idx!=0 or $idx=1; 68 $ret .= "$reg2*$idx"; 69 $ret .= "+$reg1" if ($reg1 ne ""); 70 } 71 else 72 { $ret .= "$reg1"; } 73 74 $ret .= "$post]"; 75 $ret =~ s/\+\]/]/; # in case $addr was the only argument 76 77 $ret; 78} 79sub ::BP { &get_mem("BYTE",@_); } 80sub ::DWP { &get_mem("DWORD",@_); } 81sub ::WP { &get_mem("WORD",@_); } 82sub ::QWP { &get_mem("",@_); } 83sub ::BC { (($::mwerks)?"":"BYTE ")."@_"; } 84sub ::DWC { (($::mwerks)?"":"DWORD ")."@_"; } 85 86sub ::file 87{ if ($::mwerks) { push(@out,".section\t.text,64\n"); } 88 else 89 { my $tmp=<<___; 90%ifidn __OUTPUT_FORMAT__,obj 91section code use32 class=code align=64 92%elifidn __OUTPUT_FORMAT__,win32 93\$\@feat.00 equ 1 94section .text code align=64 95%else 96section .text code 97%endif 98___ 99 push(@out,$tmp); 100 } 101} 102 103sub ::function_begin_B 104{ my $func=shift; 105 my $global=($func !~ /^_/); 106 my $begin="${::lbdecor}_${func}_begin"; 107 108 $begin =~ s/^\@/./ if ($::mwerks); # the torture never stops 109 110 &::LABEL($func,$global?"$begin":"$nmdecor$func"); 111 $func=$nmdecor.$func; 112 113 push(@out,"${drdecor}global $func\n") if ($global); 114 push(@out,"${drdecor}align 16\n"); 115 push(@out,"$func:\n"); 116 push(@out,"$begin:\n") if ($global); 117 $::stack=4; 118} 119 120sub ::function_end_B 121{ $::stack=0; 122 &::wipe_labels(); 123} 124 125sub ::file_end 126{ if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) 127 # OPENSSL_ia32cap_P size should match with internal/cryptlib.h OPENSSL_IA32CAP_P_MAX_INDEXES 128 { my $comm=<<___; 129${drdecor}segment .bss 130${drdecor}common ${nmdecor}OPENSSL_ia32cap_P 40 131___ 132 # comment out OPENSSL_ia32cap_P declarations 133 grep {s/(^extern\s+${nmdecor}OPENSSL_ia32cap_P)/\;$1/} @out; 134 push (@out,$comm) 135 } 136 push (@out,$initseg) if ($initseg); 137} 138 139sub ::comment { foreach (@_) { push(@out,"\t; $_\n"); } } 140 141sub ::external_label 142{ foreach(@_) 143 { push(@out,"${drdecor}extern\t".&::LABEL($_,$nmdecor.$_)."\n"); } 144} 145 146sub ::public_label 147{ push(@out,"${drdecor}global\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } 148 149sub ::data_byte 150{ push(@out,(($::mwerks)?".byte\t":"db\t").join(',',@_)."\n"); } 151sub ::data_short 152{ push(@out,(($::mwerks)?".word\t":"dw\t").join(',',@_)."\n"); } 153sub ::data_word 154{ push(@out,(($::mwerks)?".long\t":"dd\t").join(',',@_)."\n"); } 155 156sub ::align 157{ push(@out,"${drdecor}align\t$_[0]\n"); } 158 159sub ::picmeup 160{ my($dst,$sym)=@_; 161 &::lea($dst,&::DWP($sym)); 162} 163 164sub ::initseg 165{ my $f=$nmdecor.shift; 166 if ($::win32) 167 { $initseg=<<___; 168segment .CRT\$XCU data align=4 169extern $f 170dd $f 171___ 172 } 173} 174 175sub ::dataseg 176{ if ($mwerks) { push(@out,".section\t.data,4\n"); } 177 else { push(@out,"section\t.data align=4\n"); } 178} 179 180sub ::safeseh 181{ my $nm=shift; 182 push(@out,"%if __NASM_VERSION_ID__ >= 0x02030000\n"); 183 push(@out,"safeseh ".&::LABEL($nm,$nmdecor.$nm)."\n"); 184 push(@out,"%endif\n"); 185} 186 1871; 188
