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path: root/src/lib/libcrypto/perlasm/x86gas.pl
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Diffstat (limited to 'src/lib/libcrypto/perlasm/x86gas.pl')
-rw-r--r--src/lib/libcrypto/perlasm/x86gas.pl267
1 files changed, 267 insertions, 0 deletions
diff --git a/src/lib/libcrypto/perlasm/x86gas.pl b/src/lib/libcrypto/perlasm/x86gas.pl
new file mode 100644
index 0000000000..9a1cce026e
--- /dev/null
+++ b/src/lib/libcrypto/perlasm/x86gas.pl
@@ -0,0 +1,267 @@
1#!/usr/bin/env perl
2
3package 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
16sub 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 $;
27sub ::generic
28{ my($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($opcode); }
48 elsif ($opcode =~ m/^j/o && $#_==1) { &::emit($opcode,@arg); }
49 elsif ($opcode eq "call" && $#_==1) { &::emit($opcode,@arg); }
50 elsif ($opcode =~ m/^set/&& $#_==1) { &::emit($opcode,@arg); }
51 else { &::emit($opcode.$suffix,@arg);}
52
53 1;
54}
55#
56# opcodes not covered by ::generic above, mostly inconsistent namings...
57#
58sub ::movzx { &::movzb(@_); }
59sub ::pushfd { &::pushfl; }
60sub ::popfd { &::popfl; }
61sub ::cpuid { &::emit(".byte\t0x0f,0xa2"); }
62sub ::rdtsc { &::emit(".byte\t0x0f,0x31"); }
63
64sub ::call { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); }
65sub ::call_ptr { &::generic("call","*$_[0]"); }
66sub ::jmp_ptr { &::generic("jmp","*$_[0]"); }
67
68*::bswap = sub { &::emit("bswap","%$_[0]"); } if (!$::i386);
69
70sub ::DWP
71{ my($addr,$reg1,$reg2,$idx)=@_;
72 my $ret="";
73
74 $addr =~ s/^\s+//;
75 # prepend global references with optional underscore
76 $addr =~ s/^([^\+\-0-9][^\+\-]*)/&::islabel($1) or "$nmdecor$1"/ige;
77
78 $reg1 = "%$reg1" if ($reg1);
79 $reg2 = "%$reg2" if ($reg2);
80
81 $ret .= $addr if (($addr ne "") && ($addr ne 0));
82
83 if ($reg2)
84 { $idx!= 0 or $idx=1;
85 $ret .= "($reg1,$reg2,$idx)";
86 }
87 elsif ($reg1)
88 { $ret .= "($reg1)"; }
89
90 $ret;
91}
92sub ::QWP { &::DWP(@_); }
93sub ::BP { &::DWP(@_); }
94sub ::BC { @_; }
95sub ::DWC { @_; }
96
97sub ::file
98{ push(@out,".file\t\"$_[0].s\"\n.text\n"); }
99
100sub ::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
121sub ::function_end_B
122{ my $func=shift;
123 push(@out,".size\t$nmdecor$func,.-".&::LABEL($func)."\n") if ($::elf);
124 $::stack=0;
125 &::wipe_labels();
126}
127
128sub ::comment
129 {
130 if (!defined($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 $_ $com_end\n"); }
142 }
143 }
144
145sub ::external_label
146{ foreach(@_) { &::LABEL($_,$nmdecor.$_); } }
147
148sub ::public_label
149{ push(@out,".globl\t".&::LABEL($_[0],$nmdecor.$_[0])."\n"); }
150
151sub ::file_end
152{ if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) {
153 my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,4";
154 if ($::elf) { push (@out,"$tmp,4\n"); }
155 else { push (@out,"$tmp\n"); }
156 }
157 if ($::macosx)
158 { if (%non_lazy_ptr)
159 { push(@out,".section __IMPORT,__pointers,non_lazy_symbol_pointers\n");
160 foreach $i (keys %non_lazy_ptr)
161 { push(@out,"$non_lazy_ptr{$i}:\n.indirect_symbol\t$i\n.long\t0\n"); }
162 }
163 }
164 push(@out,$initseg) if ($initseg);
165}
166
167sub ::data_byte { push(@out,".byte\t".join(',',@_)."\n"); }
168sub ::data_word { push(@out,".long\t".join(',',@_)."\n"); }
169
170sub ::align
171{ my $val=$_[0],$p2,$i;
172 if ($::aout)
173 { for ($p2=0;$val!=0;$val>>=1) { $p2++; }
174 $val=$p2-1;
175 $val.=",0x90";
176 }
177 push(@out,".align\t$val\n");
178}
179
180sub ::picmeup
181{ my($dst,$sym,$base,$reflabel)=@_;
182
183 if ($::openbsd)
184 { &::emitraw("#if defined(PIC) || defined(__PIC__)");
185 &::emitraw("PIC_PROLOGUE");
186 &::mov($dst, &::DWP("PIC_GOT($sym)"));
187 &::emitraw("PIC_EPILOGUE");
188 &::emitraw("#else /* PIC */");
189 &::lea($dst,&::DWP($sym));
190 &::emitraw("#endif /* PIC */");
191 }
192 elsif ($::pic && ($::elf || $::aout))
193 { if (!defined($base))
194 { &::call(&::label("PIC_me_up"));
195 &::set_label("PIC_me_up");
196 &::blindpop($dst);
197 $base=$dst;
198 $reflabel=&::label("PIC_me_up");
199 }
200 if ($::macosx)
201 { my $indirect=&::static_label("$nmdecor$sym\$non_lazy_ptr");
202 &::mov($dst,&::DWP("$indirect-$reflabel",$base));
203 $non_lazy_ptr{"$nmdecor$sym"}=$indirect;
204 }
205 else
206 { &::lea($dst,&::DWP("_GLOBAL_OFFSET_TABLE_+[.-$reflabel]",
207 $base));
208 &::mov($dst,&::DWP("$sym\@GOT",$dst));
209 }
210 }
211 else
212 { &::lea($dst,&::DWP($sym)); }
213}
214
215sub ::initseg
216{ my $f=$nmdecor.shift;
217
218 if ($::openbsd)
219 { $initseg.=<<___;
220.section .init
221PIC_PROLOGUE
222 call PIC_PLT($f)
223PIC_EPILOGUE
224 jmp .Linitalign
225.align $align
226.Linitalign:
227___
228 }
229 elsif ($::elf)
230 { $initseg.=<<___;
231.section .init
232 call $f
233 jmp .Linitalign
234.align $align
235.Linitalign:
236___
237 }
238 elsif ($::coff)
239 { $initseg.=<<___; # applies to both Cygwin and Mingw
240.section .ctors
241.long $f
242___
243 }
244 elsif ($::macosx)
245 { $initseg.=<<___;
246.mod_init_func
247.align 2
248.long $f
249___
250 }
251 elsif ($::aout)
252 { my $ctor="${nmdecor}_GLOBAL_\$I\$$f";
253 $initseg.=".text\n";
254 $initseg.=".type $ctor,\@function\n" if ($::pic);
255 $initseg.=<<___; # OpenBSD way...
256.globl $ctor
257.align 2
258$ctor:
259 jmp $f
260___
261 }
262}
263
264sub ::dataseg
265{ push(@out,".data\n"); }
266
2671;
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