--- /dev/null
+#!/usr/bin/env perl
+
+# Ascetic x86_64 AT&T to MASM assembler translator by <appro>.
+#
+# Why AT&T to MASM and not vice versa? Several reasons. Because AT&T
+# format is way easier to parse. Because it's simpler to "gear" from
+# Unix ABI to Windows one [see cross-reference "card" at the end of
+# file]. Because Linux targets were available first...
+#
+# In addition the script also "distills" code suitable for GNU
+# assembler, so that it can be compiled with more rigid assemblers,
+# such as Solaris /usr/ccs/bin/as.
+#
+# This translator is not designed to convert *arbitrary* assembler
+# code from AT&T format to MASM one. It's designed to convert just
+# enough to provide for dual-ABI OpenSSL modules development...
+# There *are* limitations and you might have to modify your assembler
+# code or this script to achieve the desired result...
+#
+# Currently recognized limitations:
+#
+# - can't use multiple ops per line;
+# - indirect calls and jumps are not supported;
+#
+# Dual-ABI styling rules.
+#
+# 1. Adhere to Unix register and stack layout [see the end for
+# explanation].
+# 2. Forget about "red zone," stick to more traditional blended
+# stack frame allocation. If volatile storage is actually required
+# that is. If not, just leave the stack as is.
+# 3. Functions tagged with ".type name,@function" get crafted with
+# unified Windows prologue and epilogue automatically. If you want
+# to take care of ABI differences yourself, tag functions as
+# ".type name,@abi-omnipotent."
+# 4. As minor optimization you can specify number of input arguments
+# as ".type name,@function,N." Keep in mind that if N is larger
+# than 6, then you *have to* write "abi-omnipotent" code, because
+# it can't be resolved with unified prologue.
+# 5. Name local labels as .L*.
+# 6. Don't use repret, it's generated automatically.
+
+my $output = shift;
+open STDOUT,">$output" || die "can't open $output: $!";
+
+my $masm=1 if ($output =~ /\.asm/);
+
+my $current_segment;
+my $current_function;
+
+{ package opcode; # pick up opcodes
+ sub re {
+ my $self = shift; # single instance in enough...
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /^([a-z]+)/i) {
+ $self->{op} = $1;
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+
+ undef $self->{sz};
+ if ($self->{op} =~ /(movz)b.*/) { # movz is pain...
+ $self->{op} = $1;
+ $self->{sz} = "b";
+ } elsif ($self->{op} =~ /([a-z]{3,})([qlwb])/) {
+ $self->{op} = $1;
+ $self->{sz} = $2;
+ }
+ }
+ $ret;
+ }
+ sub size {
+ my $self = shift;
+ my $sz = shift;
+ $self->{sz} = $sz if (defined($sz) && !defined($self->{sz}));
+ $self->{sz};
+ }
+ sub out {
+ my $self = shift;
+ if (!$masm) {
+ if ($self->{op} eq "movz") { # movz in pain...
+ sprintf "%s%s%s",$self->{op},$self->{sz},shift;
+ } elsif ($self->{op} eq "ret") {
+ ".byte 0xf3,0xc3";
+ } else {
+ "$self->{op}$self->{sz}";
+ }
+ } else {
+ $self->{op} =~ s/movz/movzx/;
+ if ($self->{op} eq "ret") {
+ $self->{op} = "";
+ if ($current_function->{abi} eq "svr4") {
+ $self->{op} = "mov rdi,QWORD PTR 8[rsp]\t;WIN64 epilogue\n\t".
+ "mov rsi,QWORD PTR 16[rsp]\n\t";
+ }
+ $self->{op} .= "DB\t0F3h,0C3h\t\t;repret";
+ }
+ $self->{op};
+ }
+ }
+}
+{ package const; # pick up constants, which start with $
+ sub re {
+ my $self = shift; # single instance in enough...
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /^\$([^,]+)/) {
+ $self->{value} = $1;
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+ }
+ $ret;
+ }
+ sub out {
+ my $self = shift;
+ sprintf $masm?"%s":"\$%s",$self->{value};
+ }
+}
+{ package ea; # pick up effective addresses: expr(%reg,%reg,scale)
+ sub re {
+ my $self = shift; # single instance in enough...
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /^([^\(,]*)\(([%\w,]+)\)/) {
+ $self->{label} = $1;
+ ($self->{base},$self->{index},$self->{scale})=split(/,/,$2);
+ $self->{scale} = 1 if (!defined($self->{scale}));
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+
+ $self->{label} =~ s/\.L/\$L/g;
+ $self->{base} =~ s/^%//;
+ $self->{index} =~ s/^%// if (defined($self->{index}));
+ }
+ $ret;
+ }
+ sub size {}
+ sub out {
+ my $self = shift;
+ my $sz = shift;
+
+ if (!$masm) {
+ if (defined($self->{index})) {
+ sprintf "%s(%%%s,%%%s,%d)", $self->{label},$self->{base},
+ $self->{index},$self->{scale};
+ }
+ else {
+ sprintf "%s(%%%s)", $self->{label},$self->{base};
+ }
+ } else {
+ %szmap = ( b=>"BYTE", w=>"WORD", l=>"DWORD", q=>"QWORD" );
+
+ if (defined($self->{index})) {
+ sprintf "%s PTR %s[%s*%d+%s]",$szmap{$sz},
+ $self->{label},
+ $self->{index},$self->{scale},
+ $self->{base};
+ }
+ else {
+ sprintf "%s PTR %s[%s]",$szmap{$sz},
+ $self->{label},$self->{base};
+ }
+ }
+ }
+}
+{ package register; # pick up registers, which start with %.
+ sub re {
+ my $class = shift; # muliple instances...
+ my $self = {};
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /^%(\w+)/) {
+ bless $self,$class;
+ $self->{value} = $1;
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+ }
+ $ret;
+ }
+ sub size {
+ my $self = shift;
+ undef $ret;
+
+ if ($self->{value} =~ /^r[\d]+b$/i) { $ret="b"; }
+ elsif ($self->{value} =~ /^r[\d]+w$/i) { $ret="w"; }
+ elsif ($self->{value} =~ /^r[\d]+d$/i) { $ret="l"; }
+ elsif ($self->{value} =~ /^r[\w]+$/i) { $ret="q"; }
+ elsif ($self->{value} =~ /^[a-d][hl]$/i){ $ret="b"; }
+ elsif ($self->{value} =~ /^[\w]{2}l$/i) { $ret="b"; }
+ elsif ($self->{value} =~ /^[\w]{2}$/i) { $ret="w"; }
+ elsif ($self->{value} =~ /^e[a-z]{2}$/i){ $ret="l"; }
+
+ $ret;
+ }
+ sub out {
+ my $self = shift;
+ sprintf $masm?"%s":"%%%s",$self->{value};
+ }
+}
+{ package label; # pick up labels, which end with :
+ sub re {
+ my $self = shift; # single instance is enough...
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /(^[\.\w]+\:)/) {
+ $self->{value} = $1;
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+
+ $self->{value} =~ s/\.L/\$L/ if ($masm);
+ }
+ $ret;
+ }
+ sub out {
+ my $self = shift;
+
+ if (!$masm) {
+ $self->{value};
+ } elsif ($self->{value} ne "$current_function->{name}:") {
+ $self->{value};
+ } elsif ($current_function->{abi} eq "svr4") {
+ my $func = "$current_function->{name} PROC\n".
+ " mov QWORD PTR 8[rsp],rdi\t;WIN64 prologue\n".
+ " mov QWORD PTR 16[rsp],rsi\n";
+ my $narg = $current_function->{narg};
+ $narg=6 if (!defined($narg));
+ $func .= " mov rdi,rcx\n" if ($narg>0);
+ $func .= " mov rsi,rdx\n" if ($narg>1);
+ $func .= " mov rdx,r8\n" if ($narg>2);
+ $func .= " mov rcx,r9\n" if ($narg>3);
+ $func .= " mov r8,QWORD PTR 40[rsp]\n" if ($narg>4);
+ $func .= " mov r9,QWORD PTR 48[rsp]\n" if ($narg>5);
+ $func .= "\n";
+ } else {
+ "$current_function->{name} PROC";
+ }
+ }
+}
+{ package expr; # pick up expressioins
+ sub re {
+ my $self = shift; # single instance is enough...
+ local *line = shift;
+ undef $ret;
+
+ if ($line =~ /(^[^,]+)/) {
+ $self->{value} = $1;
+ $ret = $self;
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+
+ $self->{value} =~ s/\.L/\$L/g if ($masm);
+ }
+ $ret;
+ }
+ sub out {
+ my $self = shift;
+ $self->{value};
+ }
+}
+{ package directive; # pick up directives, which start with .
+ sub re {
+ my $self = shift; # single instance is enough...
+ local *line = shift;
+ undef $ret;
+ my $dir;
+
+ if ($line =~ /^\s*(\.\w+)/) {
+ if (!$masm) {
+ $self->{value} = $1;
+ $line =~ s/\@abi\-omnipotent/\@function/;
+ $line =~ s/\@function.*/\@function/;
+ $self->{value} = $line;
+ $line = "";
+ return $self;
+ }
+
+ $dir = $1;
+ $ret = $self;
+ undef $self->{value};
+ $line = substr($line,@+[0]); $line =~ s/^\s+//;
+ SWITCH: for ($dir) {
+ /\.(text|data)/
+ && do { my $v=undef;
+ $v="$current_segment\tENDS\n" if ($current_segment);
+ $current_segment = "_$1";
+ $current_segment =~ tr/[a-z]/[A-Z]/;
+ $v.="$current_segment\tSEGMENT PARA";
+ $self->{value} = $v;
+ last;
+ };
+ /\.globl/ && do { $self->{value} = "PUBLIC\t".$line; last; };
+ /\.type/ && do { ($sym,$type,$narg) = split(',',$line);
+ if ($type eq "\@function")
+ { undef $current_function;
+ $current_function->{name} = $sym;
+ $current_function->{abi} = "svr4";
+ $current_function->{narg} = $narg;
+ }
+ elsif ($type eq "\@abi-omnipotent")
+ { undef $current_function;
+ $current_function->{name} = $sym;
+ }
+ last;
+ };
+ /\.size/ && do { if (defined($current_function))
+ { $self->{value}="$current_function->{name}\tENDP";
+ undef $current_function;
+ }
+ last;
+ };
+ /\.align/ && do { $self->{value} = "ALIGN\t".$line; last; };
+ /\.(byte|value|long|quad)/
+ && do { my @arr = split(',',$line);
+ my $sz = substr($1,0,1);
+ my $last = pop(@arr);
+
+ $sz =~ tr/bvlq/BWDQ/;
+ $self->{value} = "\tD$sz\t";
+ for (@arr) { $self->{value} .= sprintf"0%Xh,",oct; }
+ $self->{value} .= sprintf"0%Xh",oct($last);
+ last;
+ };
+ }
+ $line = "";
+ }
+
+ $ret;
+ }
+ sub out {
+ my $self = shift;
+ $self->{value};
+ }
+}
+
+while($line=<>) {
+
+ chomp($line);
+
+ $line =~ s/\[#!].*$//; # get rid of comments...
+ $line =~ s/^\s+//; # ... and skip white spaces
+
+ undef $label;
+ undef $opcode;
+ undef $dst;
+ undef $src;
+ undef $sz;
+
+ if ($label=label->re(\$line)) { print $label->out(); }
+
+ if (directive->re(\$line)) {
+ printf "%s",directive->out();
+ } elsif ($opcode=opcode->re(\$line)) { ARGUMENT: {
+
+ if ($src=register->re(\$line)) { opcode->size($src->size()); }
+ elsif ($src=const->re(\$line)) { }
+ elsif ($src=ea->re(\$line)) { }
+ elsif ($src=expr->re(\$line)) { }
+
+ last ARGUMENT if ($line !~ /^,/);
+
+ $line = substr($line,1); $line =~ s/^\s+//;
+
+ if ($dst=register->re(\$line)) { opcode->size($dst->size()); }
+ elsif ($dst=const->re(\$line)) { }
+ elsif ($dst=ea->re(\$line)) { }
+
+ } # ARGUMENT:
+
+ $sz=opcode->size();
+
+ if (defined($dst)) {
+ if (!$masm) {
+ printf "\t%s\t%s,%s", $opcode->out($dst->size()),
+ $src->out($sz),$dst->out($sz);
+ }
+ else {
+ printf "\t%s\t%s,%s", $opcode->out(),
+ $dst->out($sz),$src->out($sz);
+ }
+ }
+ elsif (defined($src)) {
+ printf "\t%s\t%s",$opcode->out(),$src->out($sz);
+ } else {
+ printf "\t%s",$opcode->out();
+ }
+ }
+
+ print $line,"\n";
+}
+
+print "\n$current_segment\tENDS\nEND\n" if ($masm);
+
+close STDOUT;
+
+#################################################
+# Cross-reference x86_64 ABI "card"
+#
+# Unix Win64
+# %rax * *
+# %rbx - -
+# %rcx #4 #1
+# %rdx #3 #2
+# %rsi #2 -
+# %rdi #1 -
+# %rbp - -
+# %rsp - -
+# %r8 #5 #3
+# %r9 #6 #4
+# %r10 * *
+# %r11 * *
+# %r12 - -
+# %r13 - -
+# %r14 - -
+# %r15 - -
+#
+# (*) volatile register
+# (-) preserved by callee
+# (#) Nth argument, volatile
+#
+# In Unix terms top of stack is argument transfer area for arguments
+# which could not be accomodated in registers. Or in other words 7th
+# [integer] argument resides at 8(%rsp) upon function entry point.
+# 128 bytes above %rsp constitute a "red zone" which is not touched
+# by signal handlers and can be used as temporal storage without
+# allocating a frame.
+#
+# In Win64 terms N*8 bytes on top of stack is argument transfer area,
+# which belongs to/can be overwritten by callee. N is the number of
+# arguments passed to callee, *but* not less than 4! This means that
+# upon function entry point 5th argument resides at 40(%rsp), as well
+# as that 32 bytes from 8(%rsp) can always be used as temporal
+# storage [without allocating a frame].
+#
+# All the above means that if assembler programmer adheres to Unix
+# register and stack layout, but disregards the "red zone" existense,
+# it's possible to use following prologue and epilogue to "gear" from
+# Unix to Win64 ABI in leaf functions with not more than 6 arguments.
+#
+# omnipotent_function:
+# ifdef WIN64
+# movq %rdi,8(%rsp)
+# movq %rsi,16(%rsp)
+# movq %rcx,%rdi ; if 1st argument is actually present
+# movq %rdx,%rsi ; if 2nd argument is actually ...
+# movq %r8,%rdx ; if 3rd argument is ...
+# movq %r9,%rcx ; if 4th argument ...
+# movq 40(%rsp),%r8 ; if 5th ...
+# movq 48(%rsp),%r9 ; if 6th ...
+# endif
+# ...
+# ifdef WIN64
+# movq 8(%rsp),%rdi
+# movq 16(%rsp),%rsi
+# endif
+# ret
# of code remain redundant.
$output=shift;
+open STDOUT,"| $^X ../perlasm/x86_64-xlate.pl $output";
-$win64a=1 if ($output =~ /win64a.[s|asm]/);
-
-open STDOUT,">$output" || die "can't open $output: $!";
-
-if (defined($win64a)) {
- $dat="%rcx"; # arg1
- $len="%rdx"; # arg2
- $inp="%rsi"; # r8, arg3 moves here
- $out="%rdi"; # r9, arg4 moves here
-} else {
- $dat="%rdi"; # arg1
- $len="%rsi"; # arg2
- $inp="%rdx"; # arg3
- $out="%rcx"; # arg4
-}
+$dat="%rdi"; # arg1
+$len="%rsi"; # arg2
+$inp="%rdx"; # arg3
+$out="%rcx"; # arg4
$XX="%r10";
$TX="%r8";
$YY="%r11";
$TY="%r9";
-sub PTR() {
- my $ret=shift;
- if (defined($win64a)) {
- $ret =~ s/\[([\S]+)\+([\S]+)\]/[$2+$1]/g; # [%rN+%rM*4]->[%rM*4+%rN]
- $ret =~ s/:([^\[]+)\[([^\]]+)\]/:[$2+$1]/g; # :off[ea]->:[ea+off]
- } else {
- $ret =~ s/[\+\*]/,/g; # [%rN+%rM*4]->[%rN,%rM,4]
- $ret =~ s/\[([^\]]+)\]/($1)/g; # [%rN]->(%rN)
- }
- $ret;
-}
-
-$code=<<___ if (!defined($win64a));
+$code=<<___;
.text
.globl RC4
-.type RC4,\@function
+.type RC4,\@function,4
.align 16
RC4: or $len,$len
jne .Lentry
- repret
+ ret
.Lentry:
-___
-$code=<<___ if (defined($win64a));
-_TEXT SEGMENT
-PUBLIC RC4
-ALIGN 16
-RC4 PROC
- or $len,$len
- jne .Lentry
- repret
-.Lentry:
- push %rdi
- push %rsi
- sub \$40,%rsp
- mov %r8,$inp
- mov %r9,$out
-___
-$code.=<<___;
add \$8,$dat
- movl `&PTR("DWORD:-8[$dat]")`,$XX#d
- movl `&PTR("DWORD:-4[$dat]")`,$YY#d
- cmpl \$-1,`&PTR("DWORD:256[$dat]")`
+ movl -8($dat),$XX#d
+ movl -4($dat),$YY#d
+ cmpl \$-1,256($dat)
je .LRC4_CHAR
test \$-8,$len
jz .Lloop1
.align 16
.Lloop8:
inc $XX#b
- movl `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+ movl ($dat,$XX,4),$TX#d
add $TX#b,$YY#b
- movl `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
- movl $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
- movl $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+ movl ($dat,$YY,4),$TY#d
+ movl $TX#d,($dat,$YY,4)
+ movl $TY#d,($dat,$XX,4)
add $TX#b,$TY#b
inc $XX#b
- movl `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
- movb `&PTR("BYTE:[$dat+$TY*4]")`,%al
+ movl ($dat,$XX,4),$TX#d
+ movb ($dat,$TY,4),%al
___
for ($i=1;$i<=6;$i++) {
$code.=<<___;
add $TX#b,$YY#b
ror \$8,%rax
- movl `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
- movl $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
- movl $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+ movl ($dat,$YY,4),$TY#d
+ movl $TX#d,($dat,$YY,4)
+ movl $TY#d,($dat,$XX,4)
add $TX#b,$TY#b
inc $XX#b
- movl `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
- movb `&PTR("BYTE:[$dat+$TY*4]")`,%al
+ movl ($dat,$XX,4),$TX#d
+ movb ($dat,$TY,4),%al
___
}
$code.=<<___;
add $TX#b,$YY#b
ror \$8,%rax
- movl `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
- movl $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
- movl $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+ movl ($dat,$YY,4),$TY#d
+ movl $TX#d,($dat,$YY,4)
+ movl $TY#d,($dat,$XX,4)
sub \$8,$len
add $TY#b,$TX#b
- movb `&PTR("BYTE:[$dat+$TX*4]")`,%al
+ movb ($dat,$TX,4),%al
ror \$8,%rax
add \$8,$inp
add \$8,$out
- xor `&PTR("QWORD:-8[$inp]")`,%rax
- mov %rax,`&PTR("QWORD:-8[$out]")`
+ xor -8($inp),%rax
+ mov %rax,-8($out)
test \$-8,$len
jnz .Lloop8
cmp \$0,$len
jne .Lloop1
.Lexit:
- movl $XX#d,`&PTR("DWORD:-8[$dat]")`
- movl $YY#d,`&PTR("DWORD:-4[$dat]")`
-___
-$code.=<<___ if (defined($win64a));
- add \$40,%rsp
- pop %rsi
- pop %rdi
-___
-$code.=<<___;
- repret
+ movl $XX#d,-8($dat)
+ movl $YY#d,-4($dat)
+ ret
.align 16
.Lloop1:
- movzb `&PTR("BYTE:[$inp]")`,%eax
+ movzb ($inp),%eax
inc $XX#b
- movl `&PTR("DWORD:[$dat+$XX*4]")`,$TX#d
+ movl ($dat,$XX,4),$TX#d
add $TX#b,$YY#b
- movl `&PTR("DWORD:[$dat+$YY*4]")`,$TY#d
- movl $TX#d,`&PTR("DWORD:[$dat+$YY*4]")`
- movl $TY#d,`&PTR("DWORD:[$dat+$XX*4]")`
+ movl ($dat,$YY,4),$TY#d
+ movl $TX#d,($dat,$YY,4)
+ movl $TY#d,($dat,$XX,4)
add $TY#b,$TX#b
- movl `&PTR("DWORD:[$dat+$TX*4]")`,$TY#d
+ movl ($dat,$TX,4),$TY#d
xor $TY,%rax
inc $inp
- movb %al,`&PTR("BYTE:[$out]")`
+ movb %al,($out)
inc $out
dec $len
jnz .Lloop1
.align 16
.LRC4_CHAR:
add \$1,$XX#b
- movzb `&PTR("BYTE:[$dat+$XX]")`,$TX#d
+ movzb ($dat,$XX),$TX#d
add $TX#b,$YY#b
- movzb `&PTR("BYTE:[$dat+$YY]")`,$TY#d
- movb $TX#b,`&PTR("BYTE:[$dat+$YY]")`
- movb $TY#b,`&PTR("BYTE:[$dat+$XX]")`
+ movzb ($dat,$YY),$TY#d
+ movb $TX#b,($dat,$YY)
+ movb $TY#b,($dat,$XX)
add $TX#b,$TY#b
- movzb `&PTR("BYTE:[$dat+$TY]")`,$TY#d
- xorb `&PTR("BYTE:[$inp]")`,$TY#b
- movb $TY#b,`&PTR("BYTE:[$out]")`
+ movzb ($dat,$TY),$TY#d
+ xorb ($inp),$TY#b
+ movb $TY#b,($out)
lea 1($inp),$inp
lea 1($out),$out
sub \$1,$len
jnz .LRC4_CHAR
jmp .Lexit
-___
-$code.=<<___ if (defined($win64a));
-RC4 ENDP
-_TEXT ENDS
-END
-___
-$code.=<<___ if (!defined($win64a));
.size RC4,.-RC4
___
$code =~ s/#([bwd])/$1/gm;
-$code =~ s/\`([^\`]*)\`/eval $1/gem;
-if (defined($win64a)) {
- $code =~ s/\.align/ALIGN/gm;
- $code =~ s/[\$%]//gm;
- $code =~ s/\.L/\$L/gm;
- $code =~ s/([\w]+)([\s]+)([\S]+),([\S]+)/$1$2$4,$3/gm;
- $code =~ s/([QD]*WORD|BYTE):/$1 PTR/gm;
- $code =~ s/mov[bwlq]/mov/gm;
- $code =~ s/movzb/movzx/gm;
- $code =~ s/repret/DB\t0F3h,0C3h/gm;
- $code =~ s/cmpl/cmp/gm;
- $code =~ s/xorb/xor/gm;
-} else {
- $code =~ s/([QD]*WORD|BYTE)://gm;
- $code =~ s/repret/.byte\t0xF3,0xC3/gm;
-}
print $code;
+
+close STDOUT;
projects / oweals / openssl.git / commitdiff