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| (Empty) |
| 1 #!/usr/bin/env perl | |
| 2 | |
| 3 package x86gas; | |
| 4 | |
| 5 *out=\@::out; | |
| 6 | |
| 7 $::lbdecor=$::aout?"L":".L"; # local label decoration | |
| 8 $nmdecor=($::aout or $::coff)?"_":""; # external name decoration | |
| 9 | |
| 10 $initseg=""; | |
| 11 | |
| 12 $align=16; | |
| 13 $align=log($align)/log(2) if ($::aout); | |
| 14 $com_start="#" if ($::aout or $::coff); | |
| 15 | |
| 16 sub opsize() | |
| 17 { my $reg=shift; | |
| 18 if ($reg =~ m/^%e/o) { "l"; } | |
| 19 elsif ($reg =~ m/^%[a-d][hl]$/o) { "b"; } | |
| 20 elsif ($reg =~ m/^%[xm]/o) { undef; } | |
| 21 else { "w"; } | |
| 22 } | |
| 23 | |
| 24 # swap arguments; | |
| 25 # expand opcode with size suffix; | |
| 26 # prefix numeric constants with $; | |
| 27 sub ::generic | |
| 28 { my($opcode,@arg)=@_; | |
| 29 my($suffix,$dst,$src); | |
| 30 | |
| 31 @arg=reverse(@arg); | |
| 32 | |
| 33 for (@arg) | |
| 34 { s/^(\*?)(e?[a-dsixphl]{2})$/$1%$2/o; # gp registers | |
| 35 s/^([xy]?mm[0-7])$/%$1/o; # xmm/mmx registers | |
| 36 s/^(\-?[0-9]+)$/\$$1/o; # constants | |
| 37 s/^(\-?0x[0-9a-f]+)$/\$$1/o; # constants | |
| 38 } | |
| 39 | |
| 40 $dst = $arg[$#arg] if ($#arg>=0); | |
| 41 $src = $arg[$#arg-1] if ($#arg>=1); | |
| 42 if ($dst =~ m/^%/o) { $suffix=&opsize($dst); } | |
| 43 elsif ($src =~ m/^%/o) { $suffix=&opsize($src); } | |
| 44 else { $suffix="l"; } | |
| 45 undef $suffix if ($dst =~ m/^%[xm]/o || $src =~ m/^%[xm]/o); | |
| 46 | |
| 47 if ($#_==0) { &::emit($opcode); } | |
| 48 elsif ($#_==1 && $opcode =~ m/^(call|clflush|j|loop|set)/o) | |
| 49 { &::emit($opcode,@arg); } | |
| 50 else { &::emit($opcode.$suffix,@arg);} | |
| 51 | |
| 52 1; | |
| 53 } | |
| 54 # | |
| 55 # opcodes not covered by ::generic above, mostly inconsistent namings... | |
| 56 # | |
| 57 sub ::movzx { &::movzb(@_); } | |
| 58 sub ::pushfd { &::pushfl; } | |
| 59 sub ::popfd { &::popfl; } | |
| 60 sub ::cpuid { &::emit(".byte\t0x0f,0xa2"); } | |
| 61 sub ::rdtsc { &::emit(".byte\t0x0f,0x31"); } | |
| 62 | |
| 63 sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); } | |
| 64 sub ::call_ptr { &::generic("call","*$_[0]"); } | |
| 65 sub ::jmp_ptr { &::generic("jmp","*$_[0]"); } | |
| 66 | |
| 67 *::bswap = sub { &::emit("bswap","%$_[0]"); } if (!$::i386); | |
| 68 | |
| 69 sub ::DWP | |
| 70 { my($addr,$reg1,$reg2,$idx)=@_; | |
| 71 my $ret=""; | |
| 72 | |
| 73 $addr =~ s/^\s+//; | |
| 74 # prepend global references with optional underscore | |
| 75 $addr =~ s/^([^\+\-0-9][^\+\-]*)/&::islabel($1) or "$nmdecor$1"/ige; | |
| 76 | |
| 77 $reg1 = "%$reg1" if ($reg1); | |
| 78 $reg2 = "%$reg2" if ($reg2); | |
| 79 | |
| 80 $ret .= $addr if (($addr ne "") && ($addr ne 0)); | |
| 81 | |
| 82 if ($reg2) | |
| 83 { $idx!= 0 or $idx=1; | |
| 84 $ret .= "($reg1,$reg2,$idx)"; | |
| 85 } | |
| 86 elsif ($reg1) | |
| 87 { $ret .= "($reg1)"; } | |
| 88 | |
| 89 $ret; | |
| 90 } | |
| 91 sub ::QWP { &::DWP(@_); } | |
| 92 sub ::BP { &::DWP(@_); } | |
| 93 sub ::WP { &::DWP(@_); } | |
| 94 sub ::BC { @_; } | |
| 95 sub ::DWC { @_; } | |
| 96 | |
| 97 sub ::file | |
| 98 { push(@out,".file\t\"$_[0].s\"\n.text\n"); } | |
| 99 | |
| 100 sub ::function_begin_B | |
| 101 { my $func=shift; | |
| 102 my $global=($func !~ /^_/); | |
| 103 my $begin="${::lbdecor}_${func}_begin"; | |
| 104 | |
| 105 &::LABEL($func,$global?"$begin":"$nmdecor$func"); | |
| 106 $func=$nmdecor.$func; | |
| 107 | |
| 108 push(@out,".globl\t$func\n") if ($global); | |
| 109 if ($::coff) | |
| 110 { push(@out,".def\t$func;\t.scl\t".(3-$global).";\t.type\t32;\t.endef\n");
} | |
| 111 elsif (($::aout and !$::pic) or $::macosx) | |
| 112 { } | |
| 113 else | |
| 114 { push(@out,".type $func,\@function\n"); } | |
| 115 push(@out,".align\t$align\n"); | |
| 116 push(@out,"$func:\n"); | |
| 117 push(@out,"$begin:\n") if ($global); | |
| 118 $::stack=4; | |
| 119 } | |
| 120 | |
| 121 sub ::function_end_B | |
| 122 { my $func=shift; | |
| 123 push(@out,".size\t$nmdecor$func,.-".&::LABEL($func)."\n") if ($::elf); | |
| 124 $::stack=0; | |
| 125 &::wipe_labels(); | |
| 126 } | |
| 127 | |
| 128 sub ::comment | |
| 129 { | |
| 130 if (!defined($com_start) or $::elf) | |
| 131 { # Regarding $::elf above... | |
| 132 # GNU and SVR4 as'es use different comment delimiters, | |
| 133 push(@out,"\n"); # so we just skip ELF comments... | |
| 134 return; | |
| 135 } | |
| 136 foreach (@_) | |
| 137 { | |
| 138 if (/^\s*$/) | |
| 139 { push(@out,"\n"); } | |
| 140 else | |
| 141 { push(@out,"\t$com_start $_ $com_end\n"); } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 sub ::external_label | |
| 146 { foreach(@_) { &::LABEL($_,$nmdecor.$_); } } | |
| 147 | |
| 148 sub ::public_label | |
| 149 { push(@out,".globl\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); } | |
| 150 | |
| 151 sub ::file_end | |
| 152 { if ($::macosx) | |
| 153 { if (%non_lazy_ptr) | |
| 154 { push(@out,".section __IMPORT,__pointers,non_lazy_symbol_pointers\n")
; | |
| 155 foreach $i (keys %non_lazy_ptr) | |
| 156 { push(@out,"$non_lazy_ptr{$i}:\n.indirect_symbol\t$i\n.long\t0\n"
); } | |
| 157 } | |
| 158 } | |
| 159 if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) { | |
| 160 my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,8"; | |
| 161 if ($::macosx) { push (@out,"$tmp,2\n"); } | |
| 162 elsif ($::elf) { push (@out,"$tmp,4\n"); } | |
| 163 else { push (@out,"$tmp\n"); } | |
| 164 } | |
| 165 push(@out,$initseg) if ($initseg); | |
| 166 } | |
| 167 | |
| 168 sub ::data_byte { push(@out,".byte\t".join(',',@_)."\n"); } | |
| 169 sub ::data_short{ push(@out,".value\t".join(',',@_)."\n"); } | |
| 170 sub ::data_word { push(@out,".long\t".join(',',@_)."\n"); } | |
| 171 | |
| 172 sub ::align | |
| 173 { my $val=$_[0],$p2,$i; | |
| 174 if ($::aout) | |
| 175 { for ($p2=0;$val!=0;$val>>=1) { $p2++; } | |
| 176 $val=$p2-1; | |
| 177 $val.=",0x90"; | |
| 178 } | |
| 179 push(@out,".align\t$val\n"); | |
| 180 } | |
| 181 | |
| 182 sub ::picmeup | |
| 183 { my($dst,$sym,$base,$reflabel)=@_; | |
| 184 | |
| 185 if (($::pic && ($::elf || $::aout)) || $::macosx) | |
| 186 { if (!defined($base)) | |
| 187 { &::call(&::label("PIC_me_up")); | |
| 188 &::set_label("PIC_me_up"); | |
| 189 &::blindpop($dst); | |
| 190 $base=$dst; | |
| 191 $reflabel=&::label("PIC_me_up"); | |
| 192 } | |
| 193 if ($::macosx) | |
| 194 { my $indirect=&::static_label("$nmdecor$sym\$non_lazy_ptr"); | |
| 195 &::mov($dst,&::DWP("$indirect-$reflabel",$base)); | |
| 196 $non_lazy_ptr{"$nmdecor$sym"}=$indirect; | |
| 197 } | |
| 198 else | |
| 199 { &::lea($dst,&::DWP("_GLOBAL_OFFSET_TABLE_+[.-$reflabel]", | |
| 200 $base)); | |
| 201 &::mov($dst,&::DWP("$sym\@GOT",$dst)); | |
| 202 } | |
| 203 } | |
| 204 else | |
| 205 { &::lea($dst,&::DWP($sym)); } | |
| 206 } | |
| 207 | |
| 208 sub ::initseg | |
| 209 { my $f=$nmdecor.shift; | |
| 210 | |
| 211 if ($::android) | |
| 212 { $initseg.=<<___; | |
| 213 .section .init_array | |
| 214 .align 4 | |
| 215 .long $f | |
| 216 ___ | |
| 217 } | |
| 218 elsif ($::elf) | |
| 219 { $initseg.=<<___; | |
| 220 .section .init | |
| 221 call $f | |
| 222 ___ | |
| 223 } | |
| 224 elsif ($::coff) | |
| 225 { $initseg.=<<___; # applies to both Cygwin and Mingw | |
| 226 .section .ctors | |
| 227 .long $f | |
| 228 ___ | |
| 229 } | |
| 230 elsif ($::macosx) | |
| 231 { $initseg.=<<___; | |
| 232 .mod_init_func | |
| 233 .align 2 | |
| 234 .long $f | |
| 235 ___ | |
| 236 } | |
| 237 elsif ($::aout) | |
| 238 { my $ctor="${nmdecor}_GLOBAL_\$I\$$f"; | |
| 239 $initseg.=".text\n"; | |
| 240 $initseg.=".type $ctor,\@function\n" if ($::pic); | |
| 241 $initseg.=<<___; # OpenBSD way... | |
| 242 .globl $ctor | |
| 243 .align 2 | |
| 244 $ctor: | |
| 245 jmp $f | |
| 246 ___ | |
| 247 } | |
| 248 } | |
| 249 | |
| 250 sub ::dataseg | |
| 251 { push(@out,".data\n"); } | |
| 252 | |
| 253 1; | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master