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authordjm <>2010-10-01 22:54:21 +0000
committerdjm <>2010-10-01 22:54:21 +0000
commit829fd51d4f8dde4a7f3bf54754f3c1d1a502f5e2 (patch)
treee03b9f1bd051e844b971936729e9df549a209130 /src/lib/libcrypto/perlasm
parente6b755d2a53d3cac7a344dfdd6bf7c951cac754c (diff)
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import OpenSSL-1.0.0a
Diffstat (limited to 'src/lib/libcrypto/perlasm')
-rwxr-xr-xsrc/lib/libcrypto/perlasm/ppc-xlate.pl152
-rwxr-xr-xsrc/lib/libcrypto/perlasm/x86_64-xlate.pl625
-rw-r--r--src/lib/libcrypto/perlasm/x86asm.pl317
-rw-r--r--src/lib/libcrypto/perlasm/x86gas.pl247
4 files changed, 1088 insertions, 253 deletions
diff --git a/src/lib/libcrypto/perlasm/ppc-xlate.pl b/src/lib/libcrypto/perlasm/ppc-xlate.pl
new file mode 100755
index 0000000000..4579671c97
--- /dev/null
+++ b/src/lib/libcrypto/perlasm/ppc-xlate.pl
@@ -0,0 +1,152 @@
1#!/usr/bin/env perl
2
3# PowerPC assembler distiller by <appro>.
4
5my $flavour = shift;
6my $output = shift;
7open STDOUT,">$output" || die "can't open $output: $!";
8
9my %GLOBALS;
10my $dotinlocallabels=($flavour=~/linux/)?1:0;
11
12################################################################
13# directives which need special treatment on different platforms
14################################################################
15my $globl = sub {
16 my $junk = shift;
17 my $name = shift;
18 my $global = \$GLOBALS{$name};
19 my $ret;
20
21 $name =~ s|^[\.\_]||;
22
23 SWITCH: for ($flavour) {
24 /aix/ && do { $name = ".$name";
25 last;
26 };
27 /osx/ && do { $name = "_$name";
28 last;
29 };
30 /linux.*32/ && do { $ret .= ".globl $name\n";
31 $ret .= ".type $name,\@function";
32 last;
33 };
34 /linux.*64/ && do { $ret .= ".globl .$name\n";
35 $ret .= ".type .$name,\@function\n";
36 $ret .= ".section \".opd\",\"aw\"\n";
37 $ret .= ".globl $name\n";
38 $ret .= ".align 3\n";
39 $ret .= "$name:\n";
40 $ret .= ".quad .$name,.TOC.\@tocbase,0\n";
41 $ret .= ".size $name,24\n";
42 $ret .= ".previous\n";
43
44 $name = ".$name";
45 last;
46 };
47 }
48
49 $ret = ".globl $name" if (!$ret);
50 $$global = $name;
51 $ret;
52};
53my $text = sub {
54 ($flavour =~ /aix/) ? ".csect" : ".text";
55};
56my $machine = sub {
57 my $junk = shift;
58 my $arch = shift;
59 if ($flavour =~ /osx/)
60 { $arch =~ s/\"//g;
61 $arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any");
62 }
63 ".machine $arch";
64};
65my $asciz = sub {
66 shift;
67 my $line = join(",",@_);
68 if ($line =~ /^"(.*)"$/)
69 { ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; }
70 else
71 { ""; }
72};
73
74################################################################
75# simplified mnemonics not handled by at least one assembler
76################################################################
77my $cmplw = sub {
78 my $f = shift;
79 my $cr = 0; $cr = shift if ($#_>1);
80 # Some out-of-date 32-bit GNU assembler just can't handle cmplw...
81 ($flavour =~ /linux.*32/) ?
82 " .long ".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 :
83 " cmplw ".join(',',$cr,@_);
84};
85my $bdnz = sub {
86 my $f = shift;
87 my $bo = $f=~/[\+\-]/ ? 16+9 : 16; # optional "to be taken" hint
88 " bc $bo,0,".shift;
89} if ($flavour!~/linux/);
90my $bltlr = sub {
91 my $f = shift;
92 my $bo = $f=~/\-/ ? 12+2 : 12; # optional "not to be taken" hint
93 ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
94 " .long ".sprintf "0x%x",19<<26|$bo<<21|16<<1 :
95 " bclr $bo,0";
96};
97my $bnelr = sub {
98 my $f = shift;
99 my $bo = $f=~/\-/ ? 4+2 : 4; # optional "not to be taken" hint
100 ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
101 " .long ".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 :
102 " bclr $bo,2";
103};
104my $beqlr = sub {
105 my $f = shift;
106 my $bo = $f=~/-/ ? 12+2 : 12; # optional "not to be taken" hint
107 ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints
108 " .long ".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 :
109 " bclr $bo,2";
110};
111# GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two
112# arguments is 64, with "operand out of range" error.
113my $extrdi = sub {
114 my ($f,$ra,$rs,$n,$b) = @_;
115 $b = ($b+$n)&63; $n = 64-$n;
116 " rldicl $ra,$rs,$b,$n";
117};
118
119while($line=<>) {
120
121 $line =~ s|[#!;].*$||; # get rid of asm-style comments...
122 $line =~ s|/\*.*\*/||; # ... and C-style comments...
123 $line =~ s|^\s+||; # ... and skip white spaces in beginning...
124 $line =~ s|\s+$||; # ... and at the end
125
126 {
127 $line =~ s|\b\.L(\w+)|L$1|g; # common denominator for Locallabel
128 $line =~ s|\bL(\w+)|\.L$1|g if ($dotinlocallabels);
129 }
130
131 {
132 $line =~ s|(^[\.\w]+)\:\s*||;
133 my $label = $1;
134 printf "%s:",($GLOBALS{$label} or $label) if ($label);
135 }
136
137 {
138 $line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||;
139 my $c = $1; $c = "\t" if ($c eq "");
140 my $mnemonic = $2;
141 my $f = $3;
142 my $opcode = eval("\$$mnemonic");
143 $line =~ s|\bc?[rf]([0-9]+)\b|$1|g if ($c ne "." and $flavour !~ /osx/);
144 if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); }
145 elsif ($mnemonic) { $line = $c.$mnemonic.$f."\t".$line; }
146 }
147
148 print $line if ($line);
149 print "\n";
150}
151
152close STDOUT;
diff --git a/src/lib/libcrypto/perlasm/x86_64-xlate.pl b/src/lib/libcrypto/perlasm/x86_64-xlate.pl
index a4af769b4a..354673acc1 100755
--- a/src/lib/libcrypto/perlasm/x86_64-xlate.pl
+++ b/src/lib/libcrypto/perlasm/x86_64-xlate.pl
@@ -1,6 +1,6 @@
1#!/usr/bin/env perl 1#!/usr/bin/env perl
2 2
3# Ascetic x86_64 AT&T to MASM assembler translator by <appro>. 3# Ascetic x86_64 AT&T to MASM/NASM assembler translator by <appro>.
4# 4#
5# Why AT&T to MASM and not vice versa? Several reasons. Because AT&T 5# Why AT&T to MASM and not vice versa? Several reasons. Because AT&T
6# format is way easier to parse. Because it's simpler to "gear" from 6# format is way easier to parse. Because it's simpler to "gear" from
@@ -20,12 +20,11 @@
20# Currently recognized limitations: 20# Currently recognized limitations:
21# 21#
22# - can't use multiple ops per line; 22# - can't use multiple ops per line;
23# - indirect calls and jumps are not supported;
24# 23#
25# Dual-ABI styling rules. 24# Dual-ABI styling rules.
26# 25#
27# 1. Adhere to Unix register and stack layout [see the end for 26# 1. Adhere to Unix register and stack layout [see cross-reference
28# explanation]. 27# ABI "card" at the end for explanation].
29# 2. Forget about "red zone," stick to more traditional blended 28# 2. Forget about "red zone," stick to more traditional blended
30# stack frame allocation. If volatile storage is actually required 29# stack frame allocation. If volatile storage is actually required
31# that is. If not, just leave the stack as is. 30# that is. If not, just leave the stack as is.
@@ -42,21 +41,26 @@
42# 6. Don't use [or hand-code with .byte] "rep ret." "ret" mnemonic is 41# 6. Don't use [or hand-code with .byte] "rep ret." "ret" mnemonic is
43# required to identify the spots, where to inject Win64 epilogue! 42# required to identify the spots, where to inject Win64 epilogue!
44# But on the pros, it's then prefixed with rep automatically:-) 43# But on the pros, it's then prefixed with rep automatically:-)
45# 7. Due to MASM limitations [and certain general counter-intuitivity 44# 7. Stick to explicit ip-relative addressing. If you have to use
46# of ip-relative addressing] generation of position-independent 45# GOTPCREL addressing, stick to mov symbol@GOTPCREL(%rip),%r??.
47# code is assisted by synthetic directive, .picmeup, which puts 46# Both are recognized and translated to proper Win64 addressing
48# address of the *next* instruction into target register. 47# modes. To support legacy code a synthetic directive, .picmeup,
48# is implemented. It puts address of the *next* instruction into
49# target register, e.g.:
49# 50#
50# Example 1:
51# .picmeup %rax 51# .picmeup %rax
52# lea .Label-.(%rax),%rax 52# lea .Label-.(%rax),%rax
53# Example 2: 53#
54# .picmeup %rcx 54# 8. In order to provide for structured exception handling unified
55# .Lpic_point: 55# Win64 prologue copies %rsp value to %rax. For further details
56# ... 56# see SEH paragraph at the end.
57# lea .Label-.Lpic_point(%rcx),%rbp 57# 9. .init segment is allowed to contain calls to functions only.
58 58# a. If function accepts more than 4 arguments *and* >4th argument
59my $output = shift; 59# is declared as non 64-bit value, do clear its upper part.
60
61my $flavour = shift;
62my $output = shift;
63if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
60 64
61{ my ($stddev,$stdino,@junk)=stat(STDOUT); 65{ my ($stddev,$stdino,@junk)=stat(STDOUT);
62 my ($outdev,$outino,@junk)=stat($output); 66 my ($outdev,$outino,@junk)=stat($output);
@@ -65,13 +69,40 @@ my $output = shift;
65 if ($stddev!=$outdev || $stdino!=$outino); 69 if ($stddev!=$outdev || $stdino!=$outino);
66} 70}
67 71
72my $gas=1; $gas=0 if ($output =~ /\.asm$/);
73my $elf=1; $elf=0 if (!$gas);
74my $win64=0;
75my $prefix="";
76my $decor=".L";
77
68my $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005 78my $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005
69my $masm=$masmref if ($output =~ /\.asm/); 79my $masm=0;
70if ($masm && `ml64 2>&1` =~ m/Version ([0-9]+)\.([0-9]+)(\.([0-9]+))?/) 80my $PTR=" PTR";
71{ $masm=$1 + $2*2**-16 + $4*2**-32; } 81
82my $nasmref=2.03;
83my $nasm=0;
84
85if ($flavour eq "mingw64") { $gas=1; $elf=0; $win64=1;
86 $prefix=`echo __USER_LABEL_PREFIX__ | $ENV{CC} -E -P -`;
87 chomp($prefix);
88 }
89elsif ($flavour eq "macosx") { $gas=1; $elf=0; $prefix="_"; $decor="L\$"; }
90elsif ($flavour eq "masm") { $gas=0; $elf=0; $masm=$masmref; $win64=1; $decor="\$L\$"; }
91elsif ($flavour eq "nasm") { $gas=0; $elf=0; $nasm=$nasmref; $win64=1; $decor="\$L\$"; $PTR=""; }
92elsif (!$gas)
93{ if ($ENV{ASM} =~ m/nasm/ && `nasm -v` =~ m/version ([0-9]+)\.([0-9]+)/i)
94 { $nasm = $1 + $2*0.01; $PTR=""; }
95 elsif (`ml64 2>&1` =~ m/Version ([0-9]+)\.([0-9]+)(\.([0-9]+))?/)
96 { $masm = $1 + $2*2**-16 + $4*2**-32; }
97 die "no assembler found on %PATH" if (!($nasm || $masm));
98 $win64=1;
99 $elf=0;
100 $decor="\$L\$";
101}
72 102
73my $current_segment; 103my $current_segment;
74my $current_function; 104my $current_function;
105my %globals;
75 106
76{ package opcode; # pick up opcodes 107{ package opcode; # pick up opcodes
77 sub re { 108 sub re {
@@ -88,8 +119,10 @@ my $current_function;
88 if ($self->{op} =~ /^(movz)b.*/) { # movz is pain... 119 if ($self->{op} =~ /^(movz)b.*/) { # movz is pain...
89 $self->{op} = $1; 120 $self->{op} = $1;
90 $self->{sz} = "b"; 121 $self->{sz} = "b";
91 } elsif ($self->{op} =~ /call/) { 122 } elsif ($self->{op} =~ /call|jmp/) {
92 $self->{sz} = "" 123 $self->{sz} = "";
124 } elsif ($self->{op} =~ /^p/ && $' !~ /^(ush|op)/) { # SSEn
125 $self->{sz} = "";
93 } elsif ($self->{op} =~ /([a-z]{3,})([qlwb])$/) { 126 } elsif ($self->{op} =~ /([a-z]{3,})([qlwb])$/) {
94 $self->{op} = $1; 127 $self->{op} = $1;
95 $self->{sz} = $2; 128 $self->{sz} = $2;
@@ -105,13 +138,20 @@ my $current_function;
105 } 138 }
106 sub out { 139 sub out {
107 my $self = shift; 140 my $self = shift;
108 if (!$masm) { 141 if ($gas) {
109 if ($self->{op} eq "movz") { # movz is pain... 142 if ($self->{op} eq "movz") { # movz is pain...
110 sprintf "%s%s%s",$self->{op},$self->{sz},shift; 143 sprintf "%s%s%s",$self->{op},$self->{sz},shift;
111 } elsif ($self->{op} =~ /^set/) { 144 } elsif ($self->{op} =~ /^set/) {
112 "$self->{op}"; 145 "$self->{op}";
113 } elsif ($self->{op} eq "ret") { 146 } elsif ($self->{op} eq "ret") {
114 ".byte 0xf3,0xc3"; 147 my $epilogue = "";
148 if ($win64 && $current_function->{abi} eq "svr4") {
149 $epilogue = "movq 8(%rsp),%rdi\n\t" .
150 "movq 16(%rsp),%rsi\n\t";
151 }
152 $epilogue . ".byte 0xf3,0xc3";
153 } elsif ($self->{op} eq "call" && !$elf && $current_segment eq ".init") {
154 ".p2align\t3\n\t.quad";
115 } else { 155 } else {
116 "$self->{op}$self->{sz}"; 156 "$self->{op}$self->{sz}";
117 } 157 }
@@ -119,15 +159,25 @@ my $current_function;
119 $self->{op} =~ s/^movz/movzx/; 159 $self->{op} =~ s/^movz/movzx/;
120 if ($self->{op} eq "ret") { 160 if ($self->{op} eq "ret") {
121 $self->{op} = ""; 161 $self->{op} = "";
122 if ($current_function->{abi} eq "svr4") { 162 if ($win64 && $current_function->{abi} eq "svr4") {
123 $self->{op} = "mov rdi,QWORD PTR 8[rsp]\t;WIN64 epilogue\n\t". 163 $self->{op} = "mov rdi,QWORD${PTR}[8+rsp]\t;WIN64 epilogue\n\t".
124 "mov rsi,QWORD PTR 16[rsp]\n\t"; 164 "mov rsi,QWORD${PTR}[16+rsp]\n\t";
125 } 165 }
126 $self->{op} .= "DB\t0F3h,0C3h\t\t;repret"; 166 $self->{op} .= "DB\t0F3h,0C3h\t\t;repret";
127 } 167 } elsif ($self->{op} =~ /^(pop|push)f/) {
168 $self->{op} .= $self->{sz};
169 } elsif ($self->{op} eq "call" && $current_segment eq ".CRT\$XCU") {
170 $self->{op} = "ALIGN\t8\n\tDQ";
171 }
128 $self->{op}; 172 $self->{op};
129 } 173 }
130 } 174 }
175 sub mnemonic {
176 my $self=shift;
177 my $op=shift;
178 $self->{op}=$op if (defined($op));
179 $self->{op};
180 }
131} 181}
132{ package const; # pick up constants, which start with $ 182{ package const; # pick up constants, which start with $
133 sub re { 183 sub re {
@@ -145,14 +195,15 @@ my $current_function;
145 sub out { 195 sub out {
146 my $self = shift; 196 my $self = shift;
147 197
148 if (!$masm) { 198 if ($gas) {
149 # Solaris /usr/ccs/bin/as can't handle multiplications 199 # Solaris /usr/ccs/bin/as can't handle multiplications
150 # in $self->{value} 200 # in $self->{value}
151 $self->{value} =~ s/(?<![0-9a-f])(0[x0-9a-f]+)/oct($1)/egi; 201 $self->{value} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi;
152 $self->{value} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; 202 $self->{value} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg;
153 sprintf "\$%s",$self->{value}; 203 sprintf "\$%s",$self->{value};
154 } else { 204 } else {
155 $self->{value} =~ s/0x([0-9a-f]+)/0$1h/ig; 205 $self->{value} =~ s/(0b[0-1]+)/oct($1)/eig;
206 $self->{value} =~ s/0x([0-9a-f]+)/0$1h/ig if ($masm);
156 sprintf "%s",$self->{value}; 207 sprintf "%s",$self->{value};
157 } 208 }
158 } 209 }
@@ -163,13 +214,19 @@ my $current_function;
163 local *line = shift; 214 local *line = shift;
164 undef $ret; 215 undef $ret;
165 216
166 if ($line =~ /^([^\(,]*)\(([%\w,]+)\)/) { 217 # optional * ---vvv--- appears in indirect jmp/call
167 $self->{label} = $1; 218 if ($line =~ /^(\*?)([^\(,]*)\(([%\w,]+)\)/) {
168 ($self->{base},$self->{index},$self->{scale})=split(/,/,$2); 219 $self->{asterisk} = $1;
220 $self->{label} = $2;
221 ($self->{base},$self->{index},$self->{scale})=split(/,/,$3);
169 $self->{scale} = 1 if (!defined($self->{scale})); 222 $self->{scale} = 1 if (!defined($self->{scale}));
170 $ret = $self; 223 $ret = $self;
171 $line = substr($line,@+[0]); $line =~ s/^\s+//; 224 $line = substr($line,@+[0]); $line =~ s/^\s+//;
172 225
226 if ($win64 && $self->{label} =~ s/\@GOTPCREL//) {
227 die if (opcode->mnemonic() ne "mov");
228 opcode->mnemonic("lea");
229 }
173 $self->{base} =~ s/^%//; 230 $self->{base} =~ s/^%//;
174 $self->{index} =~ s/^%// if (defined($self->{index})); 231 $self->{index} =~ s/^%// if (defined($self->{index}));
175 } 232 }
@@ -180,42 +237,50 @@ my $current_function;
180 my $self = shift; 237 my $self = shift;
181 my $sz = shift; 238 my $sz = shift;
182 239
240 $self->{label} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei;
241 $self->{label} =~ s/\.L/$decor/g;
242
183 # Silently convert all EAs to 64-bit. This is required for 243 # Silently convert all EAs to 64-bit. This is required for
184 # elder GNU assembler and results in more compact code, 244 # elder GNU assembler and results in more compact code,
185 # *but* most importantly AES module depends on this feature! 245 # *but* most importantly AES module depends on this feature!
186 $self->{index} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; 246 $self->{index} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/;
187 $self->{base} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/; 247 $self->{base} =~ s/^[er](.?[0-9xpi])[d]?$/r\1/;
188 248
189 if (!$masm) { 249 if ($gas) {
190 # Solaris /usr/ccs/bin/as can't handle multiplications 250 # Solaris /usr/ccs/bin/as can't handle multiplications
191 # in $self->{label} 251 # in $self->{label}, new gas requires sign extension...
192 $self->{label} =~ s/(?<![0-9a-f])(0[x0-9a-f]+)/oct($1)/egi; 252 use integer;
253 $self->{label} =~ s/(?<![\w\$\.])(0x?[0-9a-f]+)/oct($1)/egi;
193 $self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg; 254 $self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg;
255 $self->{label} =~ s/([0-9]+)/$1<<32>>32/eg;
256 $self->{label} =~ s/^___imp_/__imp__/ if ($flavour eq "mingw64");
194 257
195 if (defined($self->{index})) { 258 if (defined($self->{index})) {
196 sprintf "%s(%%%s,%%%s,%d)", 259 sprintf "%s%s(%%%s,%%%s,%d)",$self->{asterisk},
197 $self->{label},$self->{base}, 260 $self->{label},$self->{base},
198 $self->{index},$self->{scale}; 261 $self->{index},$self->{scale};
199 } else { 262 } else {
200 sprintf "%s(%%%s)", $self->{label},$self->{base}; 263 sprintf "%s%s(%%%s)", $self->{asterisk},$self->{label},$self->{base};
201 } 264 }
202 } else { 265 } else {
203 %szmap = ( b=>"BYTE", w=>"WORD", l=>"DWORD", q=>"QWORD" ); 266 %szmap = ( b=>"BYTE$PTR", w=>"WORD$PTR", l=>"DWORD$PTR", q=>"QWORD$PTR" );
204 267
205 $self->{label} =~ s/\./\$/g; 268 $self->{label} =~ s/\./\$/g;
206 $self->{label} =~ s/0x([0-9a-f]+)/0$1h/ig; 269 $self->{label} =~ s/(?<![\w\$\.])0x([0-9a-f]+)/0$1h/ig;
207 $self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/); 270 $self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/);
271 $sz="q" if ($self->{asterisk});
208 272
209 if (defined($self->{index})) { 273 if (defined($self->{index})) {
210 sprintf "%s PTR %s[%s*%d+%s]",$szmap{$sz}, 274 sprintf "%s[%s%s*%d+%s]",$szmap{$sz},
211 $self->{label}, 275 $self->{label}?"$self->{label}+":"",
212 $self->{index},$self->{scale}, 276 $self->{index},$self->{scale},
213 $self->{base}; 277 $self->{base};
214 } elsif ($self->{base} eq "rip") { 278 } elsif ($self->{base} eq "rip") {
215 sprintf "%s PTR %s",$szmap{$sz},$self->{label}; 279 sprintf "%s[%s]",$szmap{$sz},$self->{label};
216 } else { 280 } else {
217 sprintf "%s PTR %s[%s]",$szmap{$sz}, 281 sprintf "%s[%s%s]",$szmap{$sz},
218 $self->{label},$self->{base}; 282 $self->{label}?"$self->{label}+":"",
283 $self->{base};
219 } 284 }
220 } 285 }
221 } 286 }
@@ -227,9 +292,11 @@ my $current_function;
227 local *line = shift; 292 local *line = shift;
228 undef $ret; 293 undef $ret;
229 294
230 if ($line =~ /^%(\w+)/) { 295 # optional * ---vvv--- appears in indirect jmp/call
296 if ($line =~ /^(\*?)%(\w+)/) {
231 bless $self,$class; 297 bless $self,$class;
232 $self->{value} = $1; 298 $self->{asterisk} = $1;
299 $self->{value} = $2;
233 $ret = $self; 300 $ret = $self;
234 $line = substr($line,@+[0]); $line =~ s/^\s+//; 301 $line = substr($line,@+[0]); $line =~ s/^\s+//;
235 } 302 }
@@ -252,7 +319,8 @@ my $current_function;
252 } 319 }
253 sub out { 320 sub out {
254 my $self = shift; 321 my $self = shift;
255 sprintf $masm?"%s":"%%%s",$self->{value}; 322 if ($gas) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; }
323 else { $self->{value}; }
256 } 324 }
257} 325}
258{ package label; # pick up labels, which end with : 326{ package label; # pick up labels, which end with :
@@ -261,37 +329,63 @@ my $current_function;
261 local *line = shift; 329 local *line = shift;
262 undef $ret; 330 undef $ret;
263 331
264 if ($line =~ /(^[\.\w]+\:)/) { 332 if ($line =~ /(^[\.\w]+)\:/) {
265 $self->{value} = $1; 333 $self->{value} = $1;
266 $ret = $self; 334 $ret = $self;
267 $line = substr($line,@+[0]); $line =~ s/^\s+//; 335 $line = substr($line,@+[0]); $line =~ s/^\s+//;
268 336
269 $self->{value} =~ s/\.L/\$L/ if ($masm); 337 $self->{value} =~ s/^\.L/$decor/;
270 } 338 }
271 $ret; 339 $ret;
272 } 340 }
273 sub out { 341 sub out {
274 my $self = shift; 342 my $self = shift;
275 343
276 if (!$masm) { 344 if ($gas) {
277 $self->{value}; 345 my $func = ($globals{$self->{value}} or $self->{value}) . ":";
278 } elsif ($self->{value} ne "$current_function->{name}:") { 346 if ($win64 &&
279 $self->{value}; 347 $current_function->{name} eq $self->{value} &&
280 } elsif ($current_function->{abi} eq "svr4") { 348 $current_function->{abi} eq "svr4") {
281 my $func = "$current_function->{name} PROC\n". 349 $func .= "\n";
282 " mov QWORD PTR 8[rsp],rdi\t;WIN64 prologue\n". 350 $func .= " movq %rdi,8(%rsp)\n";
283 " mov QWORD PTR 16[rsp],rsi\n"; 351 $func .= " movq %rsi,16(%rsp)\n";
352 $func .= " movq %rsp,%rax\n";
353 $func .= "${decor}SEH_begin_$current_function->{name}:\n";
354 my $narg = $current_function->{narg};
355 $narg=6 if (!defined($narg));
356 $func .= " movq %rcx,%rdi\n" if ($narg>0);
357 $func .= " movq %rdx,%rsi\n" if ($narg>1);
358 $func .= " movq %r8,%rdx\n" if ($narg>2);
359 $func .= " movq %r9,%rcx\n" if ($narg>3);
360 $func .= " movq 40(%rsp),%r8\n" if ($narg>4);
361 $func .= " movq 48(%rsp),%r9\n" if ($narg>5);
362 }
363 $func;
364 } elsif ($self->{value} ne "$current_function->{name}") {
365 $self->{value} .= ":" if ($masm && $ret!~m/^\$/);
366 $self->{value} . ":";
367 } elsif ($win64 && $current_function->{abi} eq "svr4") {
368 my $func = "$current_function->{name}" .
369 ($nasm ? ":" : "\tPROC $current_function->{scope}") .
370 "\n";
371 $func .= " mov QWORD${PTR}[8+rsp],rdi\t;WIN64 prologue\n";
372 $func .= " mov QWORD${PTR}[16+rsp],rsi\n";
373 $func .= " mov rax,rsp\n";
374 $func .= "${decor}SEH_begin_$current_function->{name}:";
375 $func .= ":" if ($masm);
376 $func .= "\n";
284 my $narg = $current_function->{narg}; 377 my $narg = $current_function->{narg};
285 $narg=6 if (!defined($narg)); 378 $narg=6 if (!defined($narg));
286 $func .= " mov rdi,rcx\n" if ($narg>0); 379 $func .= " mov rdi,rcx\n" if ($narg>0);
287 $func .= " mov rsi,rdx\n" if ($narg>1); 380 $func .= " mov rsi,rdx\n" if ($narg>1);
288 $func .= " mov rdx,r8\n" if ($narg>2); 381 $func .= " mov rdx,r8\n" if ($narg>2);
289 $func .= " mov rcx,r9\n" if ($narg>3); 382 $func .= " mov rcx,r9\n" if ($narg>3);
290 $func .= " mov r8,QWORD PTR 40[rsp]\n" if ($narg>4); 383 $func .= " mov r8,QWORD${PTR}[40+rsp]\n" if ($narg>4);
291 $func .= " mov r9,QWORD PTR 48[rsp]\n" if ($narg>5); 384 $func .= " mov r9,QWORD${PTR}[48+rsp]\n" if ($narg>5);
292 $func .= "\n"; 385 $func .= "\n";
293 } else { 386 } else {
294 "$current_function->{name} PROC"; 387 "$current_function->{name}".
388 ($nasm ? ":" : "\tPROC $current_function->{scope}");
295 } 389 }
296 } 390 }
297} 391}
@@ -306,13 +400,19 @@ my $current_function;
306 $ret = $self; 400 $ret = $self;
307 $line = substr($line,@+[0]); $line =~ s/^\s+//; 401 $line = substr($line,@+[0]); $line =~ s/^\s+//;
308 402
309 $self->{value} =~ s/\.L/\$L/g if ($masm); 403 $self->{value} =~ s/\@PLT// if (!$elf);
404 $self->{value} =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei;
405 $self->{value} =~ s/\.L/$decor/g;
310 } 406 }
311 $ret; 407 $ret;
312 } 408 }
313 sub out { 409 sub out {
314 my $self = shift; 410 my $self = shift;
315 $self->{value}; 411 if ($nasm && opcode->mnemonic()=~m/^j/) {
412 "NEAR ".$self->{value};
413 } else {
414 $self->{value};
415 }
316 } 416 }
317} 417}
318{ package directive; # pick up directives, which start with . 418{ package directive; # pick up directives, which start with .
@@ -332,89 +432,181 @@ my $current_function;
332 "%r14"=>0x01358d4c, "%r15"=>0x013d8d4c ); 432 "%r14"=>0x01358d4c, "%r15"=>0x013d8d4c );
333 433
334 if ($line =~ /^\s*(\.\w+)/) { 434 if ($line =~ /^\s*(\.\w+)/) {
335 if (!$masm) {
336 $self->{value} = $1;
337 $line =~ s/\@abi\-omnipotent/\@function/;
338 $line =~ s/\@function.*/\@function/;
339 if ($line =~ /\.picmeup\s+(%r[\w]+)/i) {
340 $self->{value} = sprintf "\t.long\t0x%x,0x90000000",$opcode{$1};
341 } elsif ($line =~ /\.asciz\s+"(.*)"$/) {
342 $self->{value} = ".byte\t".join(",",unpack("C*",$1),0);
343 } elsif ($line =~ /\.extern/) {
344 $self->{value} = ""; # swallow extern
345 } else {
346 $self->{value} = $line;
347 }
348 $line = "";
349 return $self;
350 }
351
352 $dir = $1; 435 $dir = $1;
353 $ret = $self; 436 $ret = $self;
354 undef $self->{value}; 437 undef $self->{value};
355 $line = substr($line,@+[0]); $line =~ s/^\s+//; 438 $line = substr($line,@+[0]); $line =~ s/^\s+//;
439
356 SWITCH: for ($dir) { 440 SWITCH: for ($dir) {
357 /\.(text)/ 441 /\.picmeup/ && do { if ($line =~ /(%r[\w]+)/i) {
358 && do { my $v=undef; 442 $dir="\t.long";
359 $v="$current_segment\tENDS\n" if ($current_segment); 443 $line=sprintf "0x%x,0x90000000",$opcode{$1};
360 $current_segment = "_$1\$"; 444 }
361 $current_segment =~ tr/[a-z]/[A-Z]/; 445 last;
362 $v.="$current_segment\tSEGMENT "; 446 };
363 $v.=$masm>=$masmref ? "ALIGN(64)" : "PAGE"; 447 /\.global|\.globl|\.extern/
364 $v.=" 'CODE'"; 448 && do { $globals{$line} = $prefix . $line;
365 $self->{value} = $v; 449 $line = $globals{$line} if ($prefix);
366 last; 450 last;
367 }; 451 };
368 /\.extern/ && do { $self->{value} = "EXTRN\t".$line.":BYTE"; last; };
369 /\.globl/ && do { $self->{value} = "PUBLIC\t".$line; last; };
370 /\.type/ && do { ($sym,$type,$narg) = split(',',$line); 452 /\.type/ && do { ($sym,$type,$narg) = split(',',$line);
371 if ($type eq "\@function") { 453 if ($type eq "\@function") {
372 undef $current_function; 454 undef $current_function;
373 $current_function->{name} = $sym; 455 $current_function->{name} = $sym;
374 $current_function->{abi} = "svr4"; 456 $current_function->{abi} = "svr4";
375 $current_function->{narg} = $narg; 457 $current_function->{narg} = $narg;
458 $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE";
376 } elsif ($type eq "\@abi-omnipotent") { 459 } elsif ($type eq "\@abi-omnipotent") {
377 undef $current_function; 460 undef $current_function;
378 $current_function->{name} = $sym; 461 $current_function->{name} = $sym;
462 $current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE";
463 }
464 $line =~ s/\@abi\-omnipotent/\@function/;
465 $line =~ s/\@function.*/\@function/;
466 last;
467 };
468 /\.asciz/ && do { if ($line =~ /^"(.*)"$/) {
469 $dir = ".byte";
470 $line = join(",",unpack("C*",$1),0);
379 } 471 }
380 last; 472 last;
381 }; 473 };
474 /\.rva|\.long|\.quad/
475 && do { $line =~ s/([_a-z][_a-z0-9]*)/$globals{$1} or $1/gei;
476 $line =~ s/\.L/$decor/g;
477 last;
478 };
479 }
480
481 if ($gas) {
482 $self->{value} = $dir . "\t" . $line;
483
484 if ($dir =~ /\.extern/) {
485 $self->{value} = ""; # swallow extern
486 } elsif (!$elf && $dir =~ /\.type/) {
487 $self->{value} = "";
488 $self->{value} = ".def\t" . ($globals{$1} or $1) . ";\t" .
489 (defined($globals{$1})?".scl 2;":".scl 3;") .
490 "\t.type 32;\t.endef"
491 if ($win64 && $line =~ /([^,]+),\@function/);
492 } elsif (!$elf && $dir =~ /\.size/) {
493 $self->{value} = "";
494 if (defined($current_function)) {
495 $self->{value} .= "${decor}SEH_end_$current_function->{name}:"
496 if ($win64 && $current_function->{abi} eq "svr4");
497 undef $current_function;
498 }
499 } elsif (!$elf && $dir =~ /\.align/) {
500 $self->{value} = ".p2align\t" . (log($line)/log(2));
501 } elsif ($dir eq ".section") {
502 $current_segment=$line;
503 if (!$elf && $current_segment eq ".init") {
504 if ($flavour eq "macosx") { $self->{value} = ".mod_init_func"; }
505 elsif ($flavour eq "mingw64") { $self->{value} = ".section\t.ctors"; }
506 }
507 } elsif ($dir =~ /\.(text|data)/) {
508 $current_segment=".$1";
509 }
510 $line = "";
511 return $self;
512 }
513
514 # non-gas case or nasm/masm
515 SWITCH: for ($dir) {
516 /\.text/ && do { my $v=undef;
517 if ($nasm) {
518 $v="section .text code align=64\n";
519 } else {
520 $v="$current_segment\tENDS\n" if ($current_segment);
521 $current_segment = ".text\$";
522 $v.="$current_segment\tSEGMENT ";
523 $v.=$masm>=$masmref ? "ALIGN(64)" : "PAGE";
524 $v.=" 'CODE'";
525 }
526 $self->{value} = $v;
527 last;
528 };
529 /\.data/ && do { my $v=undef;
530 if ($nasm) {
531 $v="section .data data align=8\n";
532 } else {
533 $v="$current_segment\tENDS\n" if ($current_segment);
534 $current_segment = "_DATA";
535 $v.="$current_segment\tSEGMENT";
536 }
537 $self->{value} = $v;
538 last;
539 };
540 /\.section/ && do { my $v=undef;
541 $line =~ s/([^,]*).*/$1/;
542 $line = ".CRT\$XCU" if ($line eq ".init");
543 if ($nasm) {
544 $v="section $line";
545 if ($line=~/\.([px])data/) {
546 $v.=" rdata align=";
547 $v.=$1 eq "p"? 4 : 8;
548 }
549 } else {
550 $v="$current_segment\tENDS\n" if ($current_segment);
551 $v.="$line\tSEGMENT";
552 if ($line=~/\.([px])data/) {
553 $v.=" READONLY";
554 $v.=" ALIGN(".($1 eq "p" ? 4 : 8).")" if ($masm>=$masmref);
555 }
556 }
557 $current_segment = $line;
558 $self->{value} = $v;
559 last;
560 };
561 /\.extern/ && do { $self->{value} = "EXTERN\t".$line;
562 $self->{value} .= ":NEAR" if ($masm);
563 last;
564 };
565 /\.globl|.global/
566 && do { $self->{value} = $masm?"PUBLIC":"global";
567 $self->{value} .= "\t".$line;
568 last;
569 };
382 /\.size/ && do { if (defined($current_function)) { 570 /\.size/ && do { if (defined($current_function)) {
383 $self->{value}="$current_function->{name}\tENDP"; 571 undef $self->{value};
572 if ($current_function->{abi} eq "svr4") {
573 $self->{value}="${decor}SEH_end_$current_function->{name}:";
574 $self->{value}.=":\n" if($masm);
575 }
576 $self->{value}.="$current_function->{name}\tENDP" if($masm);
384 undef $current_function; 577 undef $current_function;
385 } 578 }
386 last; 579 last;
387 }; 580 };
388 /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; }; 581 /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; };
389 /\.(byte|value|long|quad)/ 582 /\.(value|long|rva|quad)/
390 && do { my @arr = split(',',$line); 583 && do { my $sz = substr($1,0,1);
391 my $sz = substr($1,0,1); 584 my @arr = split(/,\s*/,$line);
392 my $last = pop(@arr); 585 my $last = pop(@arr);
393 my $conv = sub { my $var=shift; 586 my $conv = sub { my $var=shift;
394 if ($var=~s/0x([0-9a-f]+)/0$1h/i) { $var; } 587 $var=~s/^(0b[0-1]+)/oct($1)/eig;
395 else { sprintf"0%Xh",$var; } 588 $var=~s/^0x([0-9a-f]+)/0$1h/ig if ($masm);
589 if ($sz eq "D" && ($current_segment=~/.[px]data/ || $dir eq ".rva"))
590 { $var=~s/([_a-z\$\@][_a-z0-9\$\@]*)/$nasm?"$1 wrt ..imagebase":"imagerel $1"/egi; }
591 $var;
396 }; 592 };
397 593
398 $sz =~ tr/bvlq/BWDQ/; 594 $sz =~ tr/bvlrq/BWDDQ/;
399 $self->{value} = "\tD$sz\t"; 595 $self->{value} = "\tD$sz\t";
400 for (@arr) { $self->{value} .= &$conv($_).","; } 596 for (@arr) { $self->{value} .= &$conv($_).","; }
401 $self->{value} .= &$conv($last); 597 $self->{value} .= &$conv($last);
402 last; 598 last;
403 }; 599 };
404 /\.picmeup/ && do { $self->{value} = sprintf"\tDD\t 0%Xh,090000000h",$opcode{$line}; 600 /\.byte/ && do { my @str=split(/,\s*/,$line);
405 last; 601 map(s/(0b[0-1]+)/oct($1)/eig,@str);
406 }; 602 map(s/0x([0-9a-f]+)/0$1h/ig,@str) if ($masm);
407 /\.asciz/ && do { if ($line =~ /^"(.*)"$/) { 603 while ($#str>15) {
408 my @str=unpack("C*",$1);
409 push @str,0;
410 while ($#str>15) {
411 $self->{value}.="DB\t"
412 .join(",",@str[0..15])."\n";
413 foreach (0..15) { shift @str; }
414 }
415 $self->{value}.="DB\t" 604 $self->{value}.="DB\t"
416 .join(",",@str) if (@str); 605 .join(",",@str[0..15])."\n";
606 foreach (0..15) { shift @str; }
417 } 607 }
608 $self->{value}.="DB\t"
609 .join(",",@str) if (@str);
418 last; 610 last;
419 }; 611 };
420 } 612 }
@@ -429,6 +621,15 @@ my $current_function;
429 } 621 }
430} 622}
431 623
624if ($nasm) {
625 print <<___;
626default rel
627___
628} elsif ($masm) {
629 print <<___;
630OPTION DOTNAME
631___
632}
432while($line=<>) { 633while($line=<>) {
433 634
434 chomp($line); 635 chomp($line);
@@ -439,43 +640,42 @@ while($line=<>) {
439 640
440 undef $label; 641 undef $label;
441 undef $opcode; 642 undef $opcode;
442 undef $dst;
443 undef $src;
444 undef $sz; 643 undef $sz;
644 undef @args;
445 645
446 if ($label=label->re(\$line)) { print $label->out(); } 646 if ($label=label->re(\$line)) { print $label->out(); }
447 647
448 if (directive->re(\$line)) { 648 if (directive->re(\$line)) {
449 printf "%s",directive->out(); 649 printf "%s",directive->out();
450 } elsif ($opcode=opcode->re(\$line)) { ARGUMENT: { 650 } elsif ($opcode=opcode->re(\$line)) { ARGUMENT: while (1) {
451 651 my $arg;
452 if ($src=register->re(\$line)) { opcode->size($src->size()); }
453 elsif ($src=const->re(\$line)) { }
454 elsif ($src=ea->re(\$line)) { }
455 elsif ($src=expr->re(\$line)) { }
456 652
457 last ARGUMENT if ($line !~ /^,/); 653 if ($arg=register->re(\$line)) { opcode->size($arg->size()); }
654 elsif ($arg=const->re(\$line)) { }
655 elsif ($arg=ea->re(\$line)) { }
656 elsif ($arg=expr->re(\$line)) { }
657 else { last ARGUMENT; }
458 658
459 $line = substr($line,1); $line =~ s/^\s+//; 659 push @args,$arg;
460 660
461 if ($dst=register->re(\$line)) { opcode->size($dst->size()); } 661 last ARGUMENT if ($line !~ /^,/);
462 elsif ($dst=const->re(\$line)) { }
463 elsif ($dst=ea->re(\$line)) { }
464 662
663 $line =~ s/^,\s*//;
465 } # ARGUMENT: 664 } # ARGUMENT:
466 665
467 $sz=opcode->size(); 666 $sz=opcode->size();
468 667
469 if (defined($dst)) { 668 if ($#args>=0) {
470 if (!$masm) { 669 my $insn;
471 printf "\t%s\t%s,%s", $opcode->out($dst->size()), 670 if ($gas) {
472 $src->out($sz),$dst->out($sz); 671 $insn = $opcode->out($#args>=1?$args[$#args]->size():$sz);
473 } else { 672 } else {
474 printf "\t%s\t%s,%s", $opcode->out(), 673 $insn = $opcode->out();
475 $dst->out($sz),$src->out($sz); 674 $insn .= $sz if (map($_->out() =~ /x?mm/,@args));
675 @args = reverse(@args);
676 undef $sz if ($nasm && $opcode->mnemonic() eq "lea");
476 } 677 }
477 } elsif (defined($src)) { 678 printf "\t%s\t%s",$insn,join(",",map($_->out($sz),@args));
478 printf "\t%s\t%s",$opcode->out(),$src->out($sz);
479 } else { 679 } else {
480 printf "\t%s",$opcode->out(); 680 printf "\t%s",$opcode->out();
481 } 681 }
@@ -484,11 +684,12 @@ while($line=<>) {
484 print $line,"\n"; 684 print $line,"\n";
485} 685}
486 686
487print "\n$current_segment\tENDS\nEND\n" if ($masm); 687print "\n$current_segment\tENDS\n" if ($current_segment && $masm);
688print "END\n" if ($masm);
488 689
489close STDOUT; 690close STDOUT;
490 691
491################################################# 692 #################################################
492# Cross-reference x86_64 ABI "card" 693# Cross-reference x86_64 ABI "card"
493# 694#
494# Unix Win64 695# Unix Win64
@@ -552,3 +753,161 @@ close STDOUT;
552# movq 16(%rsp),%rsi 753# movq 16(%rsp),%rsi
553# endif 754# endif
554# ret 755# ret
756#
757 #################################################
758# Win64 SEH, Structured Exception Handling.
759#
760# Unlike on Unix systems(*) lack of Win64 stack unwinding information
761# has undesired side-effect at run-time: if an exception is raised in
762# assembler subroutine such as those in question (basically we're
763# referring to segmentation violations caused by malformed input
764# parameters), the application is briskly terminated without invoking
765# any exception handlers, most notably without generating memory dump
766# or any user notification whatsoever. This poses a problem. It's
767# possible to address it by registering custom language-specific
768# handler that would restore processor context to the state at
769# subroutine entry point and return "exception is not handled, keep
770# unwinding" code. Writing such handler can be a challenge... But it's
771# doable, though requires certain coding convention. Consider following
772# snippet:
773#
774# .type function,@function
775# function:
776# movq %rsp,%rax # copy rsp to volatile register
777# pushq %r15 # save non-volatile registers
778# pushq %rbx
779# pushq %rbp
780# movq %rsp,%r11
781# subq %rdi,%r11 # prepare [variable] stack frame
782# andq $-64,%r11
783# movq %rax,0(%r11) # check for exceptions
784# movq %r11,%rsp # allocate [variable] stack frame
785# movq %rax,0(%rsp) # save original rsp value
786# magic_point:
787# ...
788# movq 0(%rsp),%rcx # pull original rsp value
789# movq -24(%rcx),%rbp # restore non-volatile registers
790# movq -16(%rcx),%rbx
791# movq -8(%rcx),%r15
792# movq %rcx,%rsp # restore original rsp
793# ret
794# .size function,.-function
795#
796# The key is that up to magic_point copy of original rsp value remains
797# in chosen volatile register and no non-volatile register, except for
798# rsp, is modified. While past magic_point rsp remains constant till
799# the very end of the function. In this case custom language-specific
800# exception handler would look like this:
801#
802# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
803# CONTEXT *context,DISPATCHER_CONTEXT *disp)
804# { ULONG64 *rsp = (ULONG64 *)context->Rax;
805# if (context->Rip >= magic_point)
806# { rsp = ((ULONG64 **)context->Rsp)[0];
807# context->Rbp = rsp[-3];
808# context->Rbx = rsp[-2];
809# context->R15 = rsp[-1];
810# }
811# context->Rsp = (ULONG64)rsp;
812# context->Rdi = rsp[1];
813# context->Rsi = rsp[2];
814#
815# memcpy (disp->ContextRecord,context,sizeof(CONTEXT));
816# RtlVirtualUnwind(UNW_FLAG_NHANDLER,disp->ImageBase,
817# dips->ControlPc,disp->FunctionEntry,disp->ContextRecord,
818# &disp->HandlerData,&disp->EstablisherFrame,NULL);
819# return ExceptionContinueSearch;
820# }
821#
822# It's appropriate to implement this handler in assembler, directly in
823# function's module. In order to do that one has to know members'
824# offsets in CONTEXT and DISPATCHER_CONTEXT structures and some constant
825# values. Here they are:
826#
827# CONTEXT.Rax 120
828# CONTEXT.Rcx 128
829# CONTEXT.Rdx 136
830# CONTEXT.Rbx 144
831# CONTEXT.Rsp 152
832# CONTEXT.Rbp 160
833# CONTEXT.Rsi 168
834# CONTEXT.Rdi 176
835# CONTEXT.R8 184
836# CONTEXT.R9 192
837# CONTEXT.R10 200
838# CONTEXT.R11 208
839# CONTEXT.R12 216
840# CONTEXT.R13 224
841# CONTEXT.R14 232
842# CONTEXT.R15 240
843# CONTEXT.Rip 248
844# CONTEXT.Xmm6 512
845# sizeof(CONTEXT) 1232
846# DISPATCHER_CONTEXT.ControlPc 0
847# DISPATCHER_CONTEXT.ImageBase 8
848# DISPATCHER_CONTEXT.FunctionEntry 16
849# DISPATCHER_CONTEXT.EstablisherFrame 24
850# DISPATCHER_CONTEXT.TargetIp 32
851# DISPATCHER_CONTEXT.ContextRecord 40
852# DISPATCHER_CONTEXT.LanguageHandler 48
853# DISPATCHER_CONTEXT.HandlerData 56
854# UNW_FLAG_NHANDLER 0
855# ExceptionContinueSearch 1
856#
857# In order to tie the handler to the function one has to compose
858# couple of structures: one for .xdata segment and one for .pdata.
859#
860# UNWIND_INFO structure for .xdata segment would be
861#
862# function_unwind_info:
863# .byte 9,0,0,0
864# .rva handler
865#
866# This structure designates exception handler for a function with
867# zero-length prologue, no stack frame or frame register.
868#
869# To facilitate composing of .pdata structures, auto-generated "gear"
870# prologue copies rsp value to rax and denotes next instruction with
871# .LSEH_begin_{function_name} label. This essentially defines the SEH
872# styling rule mentioned in the beginning. Position of this label is
873# chosen in such manner that possible exceptions raised in the "gear"
874# prologue would be accounted to caller and unwound from latter's frame.
875# End of function is marked with respective .LSEH_end_{function_name}
876# label. To summarize, .pdata segment would contain
877#
878# .rva .LSEH_begin_function
879# .rva .LSEH_end_function
880# .rva function_unwind_info
881#
882# Reference to functon_unwind_info from .xdata segment is the anchor.
883# In case you wonder why references are 32-bit .rvas and not 64-bit
884# .quads. References put into these two segments are required to be
885# *relative* to the base address of the current binary module, a.k.a.
886# image base. No Win64 module, be it .exe or .dll, can be larger than
887# 2GB and thus such relative references can be and are accommodated in
888# 32 bits.
889#
890# Having reviewed the example function code, one can argue that "movq
891# %rsp,%rax" above is redundant. It is not! Keep in mind that on Unix
892# rax would contain an undefined value. If this "offends" you, use
893# another register and refrain from modifying rax till magic_point is
894# reached, i.e. as if it was a non-volatile register. If more registers
895# are required prior [variable] frame setup is completed, note that
896# nobody says that you can have only one "magic point." You can
897# "liberate" non-volatile registers by denoting last stack off-load
898# instruction and reflecting it in finer grade unwind logic in handler.
899# After all, isn't it why it's called *language-specific* handler...
900#
901# Attentive reader can notice that exceptions would be mishandled in
902# auto-generated "gear" epilogue. Well, exception effectively can't
903# occur there, because if memory area used by it was subject to
904# segmentation violation, then it would be raised upon call to the
905# function (and as already mentioned be accounted to caller, which is
906# not a problem). If you're still not comfortable, then define tail
907# "magic point" just prior ret instruction and have handler treat it...
908#
909# (*) Note that we're talking about run-time, not debug-time. Lack of
910# unwind information makes debugging hard on both Windows and
911# Unix. "Unlike" referes to the fact that on Unix signal handler
912# will always be invoked, core dumped and appropriate exit code
913# returned to parent (for user notification).
diff --git a/src/lib/libcrypto/perlasm/x86asm.pl b/src/lib/libcrypto/perlasm/x86asm.pl
index 5979122158..28080caaa6 100644
--- a/src/lib/libcrypto/perlasm/x86asm.pl
+++ b/src/lib/libcrypto/perlasm/x86asm.pl
@@ -1,130 +1,207 @@
1#!/usr/local/bin/perl 1#!/usr/bin/env perl
2 2
3# require 'x86asm.pl'; 3# require 'x86asm.pl';
4# &asm_init("cpp","des-586.pl"); 4# &asm_init(<flavor>,"des-586.pl"[,$i386only]);
5# XXX 5# &function_begin("foo");
6# XXX 6# ...
7# main'asm_finish 7# &function_end("foo");
8 8# &asm_finish
9sub main'asm_finish 9
10 { 10$out=();
11 &file_end(); 11$i386=0;
12 &asm_finish_cpp() if $cpp; 12
13 print &asm_get_output(); 13# AUTOLOAD is this context has quite unpleasant side effect, namely
14 } 14# that typos in function calls effectively go to assembler output,
15 15# but on the pros side we don't have to implement one subroutine per
16sub main'asm_init 16# each opcode...
17 { 17sub ::AUTOLOAD
18 ($type,$fn,$i386)=@_; 18{ my $opcode = $AUTOLOAD;
19 $filename=$fn; 19
20 20 die "more than 4 arguments passed to $opcode" if ($#_>3);
21 $elf=$cpp=$coff=$aout=$win32=$netware=$mwerks=0; 21
22 if ( ($type eq "elf")) 22 $opcode =~ s/.*:://;
23 { $elf=1; require "x86unix.pl"; } 23 if ($opcode =~ /^push/) { $stack+=4; }
24 elsif ( ($type eq "a.out")) 24 elsif ($opcode =~ /^pop/) { $stack-=4; }
25 { $aout=1; require "x86unix.pl"; } 25
26 elsif ( ($type eq "coff" or $type eq "gaswin")) 26 &generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD";
27 { $coff=1; require "x86unix.pl"; } 27}
28 elsif ( ($type eq "cpp")) 28
29 { $cpp=1; require "x86unix.pl"; } 29sub ::emit
30 elsif ( ($type eq "win32")) 30{ my $opcode=shift;
31 { $win32=1; require "x86ms.pl"; } 31
32 elsif ( ($type eq "win32n")) 32 if ($#_==-1) { push(@out,"\t$opcode\n"); }
33 { $win32=1; require "x86nasm.pl"; } 33 else { push(@out,"\t$opcode\t".join(',',@_)."\n"); }
34 elsif ( ($type eq "nw-nasm")) 34}
35 { $netware=1; require "x86nasm.pl"; } 35
36 elsif ( ($type eq "nw-mwasm")) 36sub ::LB
37 { $netware=1; $mwerks=1; require "x86nasm.pl"; } 37{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'";
38 else 38 $1."l";
39 { 39}
40 print STDERR <<"EOF"; 40sub ::HB
41{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'";
42 $1."h";
43}
44sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); }
45sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); }
46sub ::blindpop { &pop($_[0]); $stack+=4; }
47sub ::wparam { &DWP($stack+4*$_[0],"esp"); }
48sub ::swtmp { &DWP(4*$_[0],"esp"); }
49
50sub ::bswap
51{ if ($i386) # emulate bswap for i386
52 { &comment("bswap @_");
53 &xchg(&HB(@_),&LB(@_));
54 &ror (@_,16);
55 &xchg(&HB(@_),&LB(@_));
56 }
57 else
58 { &generic("bswap",@_); }
59}
60# These are made-up opcodes introduced over the years essentially
61# by ignorance, just alias them to real ones...
62sub ::movb { &mov(@_); }
63sub ::xorb { &xor(@_); }
64sub ::rotl { &rol(@_); }
65sub ::rotr { &ror(@_); }
66sub ::exch { &xchg(@_); }
67sub ::halt { &hlt; }
68sub ::movz { &movzx(@_); }
69sub ::pushf { &pushfd; }
70sub ::popf { &popfd; }
71
72# 3 argument instructions
73sub ::movq
74{ my($p1,$p2,$optimize)=@_;
75
76 if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
77 # movq between mmx registers can sink Intel CPUs
78 { &::pshufw($p1,$p2,0xe4); }
79 else
80 { &::generic("movq",@_); }
81}
82
83# label management
84$lbdecor="L"; # local label decoration, set by package
85$label="000";
86
87sub ::islabel # see is argument is a known label
88{ my $i;
89 foreach $i (values %label) { return $i if ($i eq $_[0]); }
90 $label{$_[0]}; # can be undef
91}
92
93sub ::label # instantiate a function-scope label
94{ if (!defined($label{$_[0]}))
95 { $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; }
96 $label{$_[0]};
97}
98
99sub ::LABEL # instantiate a file-scope label
100{ $label{$_[0]}=$_[1] if (!defined($label{$_[0]}));
101 $label{$_[0]};
102}
103
104sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); }
105
106sub ::set_label_B { push(@out,"@_:\n"); }
107sub ::set_label
108{ my $label=&::label($_[0]);
109 &::align($_[1]) if ($_[1]>1);
110 &::set_label_B($label);
111 $label;
112}
113
114sub ::wipe_labels # wipes function-scope labels
115{ foreach $i (keys %label)
116 { delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); }
117}
118
119# subroutine management
120sub ::function_begin
121{ &function_begin_B(@_);
122 $stack=4;
123 &push("ebp");
124 &push("ebx");
125 &push("esi");
126 &push("edi");
127}
128
129sub ::function_end
130{ &pop("edi");
131 &pop("esi");
132 &pop("ebx");
133 &pop("ebp");
134 &ret();
135 &function_end_B(@_);
136 $stack=0;
137 &wipe_labels();
138}
139
140sub ::function_end_A
141{ &pop("edi");
142 &pop("esi");
143 &pop("ebx");
144 &pop("ebp");
145 &ret();
146 $stack+=16; # readjust esp as if we didn't pop anything
147}
148
149sub ::asciz
150{ my @str=unpack("C*",shift);
151 push @str,0;
152 while ($#str>15) {
153 &data_byte(@str[0..15]);
154 foreach (0..15) { shift @str; }
155 }
156 &data_byte(@str) if (@str);
157}
158
159sub ::asm_finish
160{ &file_end();
161 print @out;
162}
163
164sub ::asm_init
165{ my ($type,$fn,$cpu)=@_;
166
167 $filename=$fn;
168 $i386=$cpu;
169
170 $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=0;
171 if (($type eq "elf"))
172 { $elf=1; require "x86gas.pl"; }
173 elsif (($type eq "a\.out"))
174 { $aout=1; require "x86gas.pl"; }
175 elsif (($type eq "coff" or $type eq "gaswin"))
176 { $coff=1; require "x86gas.pl"; }
177 elsif (($type eq "win32n"))
178 { $win32=1; require "x86nasm.pl"; }
179 elsif (($type eq "nw-nasm"))
180 { $netware=1; require "x86nasm.pl"; }
181 #elsif (($type eq "nw-mwasm"))
182 #{ $netware=1; $mwerks=1; require "x86nasm.pl"; }
183 elsif (($type eq "win32"))
184 { $win32=1; require "x86masm.pl"; }
185 elsif (($type eq "macosx"))
186 { $aout=1; $macosx=1; require "x86gas.pl"; }
187 else
188 { print STDERR <<"EOF";
41Pick one target type from 189Pick one target type from
42 elf - Linux, FreeBSD, Solaris x86, etc. 190 elf - Linux, FreeBSD, Solaris x86, etc.
43 a.out - OpenBSD, DJGPP, etc. 191 a.out - DJGPP, elder OpenBSD, etc.
44 coff - GAS/COFF such as Win32 targets 192 coff - GAS/COFF such as Win32 targets
45 win32 - Windows 95/Windows NT
46 win32n - Windows 95/Windows NT NASM format 193 win32n - Windows 95/Windows NT NASM format
47 nw-nasm - NetWare NASM format 194 nw-nasm - NetWare NASM format
48 nw-mwasm- NetWare Metrowerks Assembler 195 macosx - Mac OS X
49EOF 196EOF
50 exit(1); 197 exit(1);
51 } 198 }
52 199
53 $pic=0; 200 $pic=0;
54 for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); } 201 for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); }
55 202
56 &asm_init_output(); 203 $filename =~ s/\.pl$//;
57 204 &file($filename);
58&comment("Don't even think of reading this code"); 205}
59&comment("It was automatically generated by $filename");
60&comment("Which is a perl program used to generate the x86 assember for");
61&comment("any of ELF, a.out, COFF, Win32, ...");
62&comment("eric <eay\@cryptsoft.com>");
63&comment("");
64
65 $filename =~ s/\.pl$//;
66 &file($filename);
67 }
68
69sub asm_finish_cpp
70 {
71 return unless $cpp;
72
73 local($tmp,$i);
74 foreach $i (&get_labels())
75 {
76 $tmp.="#define $i _$i\n";
77 }
78 print <<"EOF";
79/* Run the C pre-processor over this file with one of the following defined
80 * ELF - elf object files,
81 * OUT - a.out object files,
82 * BSDI - BSDI style a.out object files
83 * SOL - Solaris style elf
84 */
85
86#define TYPE(a,b) .type a,b
87#define SIZE(a,b) .size a,b
88
89#if defined(OUT) || (defined(BSDI) && !defined(ELF))
90$tmp
91#endif
92
93#ifdef OUT
94#define OK 1
95#define ALIGN 4
96#if defined(__CYGWIN__) || defined(__DJGPP__) || (__MINGW32__)
97#undef SIZE
98#undef TYPE
99#define SIZE(a,b)
100#define TYPE(a,b) .def a; .scl 2; .type 32; .endef
101#endif /* __CYGWIN || __DJGPP */
102#endif
103
104#if defined(BSDI) && !defined(ELF)
105#define OK 1
106#define ALIGN 4
107#undef SIZE
108#undef TYPE
109#define SIZE(a,b)
110#define TYPE(a,b)
111#endif
112
113#if defined(ELF) || defined(SOL)
114#define OK 1
115#define ALIGN 16
116#endif
117
118#ifndef OK
119You need to define one of
120ELF - elf systems - linux-elf, NetBSD and DG-UX
121OUT - a.out systems - linux-a.out and FreeBSD
122SOL - solaris systems, which are elf with strange comment lines
123BSDI - a.out with a very primative version of as.
124#endif
125
126/* Let the Assembler begin :-) */
127EOF
128 }
129 206
1301; 2071;
diff --git a/src/lib/libcrypto/perlasm/x86gas.pl b/src/lib/libcrypto/perlasm/x86gas.pl
new file mode 100644
index 0000000000..6eab727fd4
--- /dev/null
+++ b/src/lib/libcrypto/perlasm/x86gas.pl
@@ -0,0 +1,247 @@
1#!/usr/bin/env perl
2
3package x86gas;
4
5*out=\@::out;
6
7$::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 ($::pic && ($::elf || $::aout))
184 { if (!defined($base))
185 { &::call(&::label("PIC_me_up"));
186 &::set_label("PIC_me_up");
187 &::blindpop($dst);
188 $base=$dst;
189 $reflabel=&::label("PIC_me_up");
190 }
191 if ($::macosx)
192 { my $indirect=&::static_label("$nmdecor$sym\$non_lazy_ptr");
193 &::mov($dst,&::DWP("$indirect-$reflabel",$base));
194 $non_lazy_ptr{"$nmdecor$sym"}=$indirect;
195 }
196 else
197 { &::lea($dst,&::DWP("_GLOBAL_OFFSET_TABLE_+[.-$reflabel]",
198 $base));
199 &::mov($dst,&::DWP("$sym\@GOT",$dst));
200 }
201 }
202 else
203 { &::lea($dst,&::DWP($sym)); }
204}
205
206sub ::initseg
207{ my $f=$nmdecor.shift;
208
209 if ($::elf)
210 { $initseg.=<<___;
211.section .init
212 call $f
213 jmp .Linitalign
214.align $align
215.Linitalign:
216___
217 }
218 elsif ($::coff)
219 { $initseg.=<<___; # applies to both Cygwin and Mingw
220.section .ctors
221.long $f
222___
223 }
224 elsif ($::macosx)
225 { $initseg.=<<___;
226.mod_init_func
227.align 2
228.long $f
229___
230 }
231 elsif ($::aout)
232 { my $ctor="${nmdecor}_GLOBAL_\$I\$$f";
233 $initseg.=".text\n";
234 $initseg.=".type $ctor,\@function\n" if ($::pic);
235 $initseg.=<<___; # OpenBSD way...
236.globl $ctor
237.align 2
238$ctor:
239 jmp $f
240___
241 }
242}
243
244sub ::dataseg
245{ push(@out,".data\n"); }
246
2471;
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-01-06 01:44:36 +0000