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https://github.com/openssl/openssl.git
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x86_64-xlate.pl: implement indirect jump/calls, support for Win64 SEH.
This commit is contained in:
Andy Polyakov
parent
5b331ab77a
commit
9b634c9b37
@ -20,7 +20,6 @@
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# Currently recognized limitations:
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#
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# - can't use multiple ops per line;
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# - indirect calls and jumps are not supported;
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#
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# Dual-ABI styling rules.
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#
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@ -68,20 +67,23 @@ my $output = shift;
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my $win64=1 if ($output =~ /\.asm/);
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my $masmref=8 + 50727*2**-32; # 8.00.50727 shipped with VS2005
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my $masm=$masmref;
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my $masm=0;
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my $PTR=" PTR";
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my $nasmref=2.03;
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my $nasm=0;
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if ($win64)
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{ if ($ENV{ASM} =~ m/nasm/)
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{ $nasm = 1; $PTR=""; }
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{ if ($ENV{ASM} =~ m/nasm/ && `nasm -v` =~ m/version ([0-9]+)\.([0-9]+)/i)
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{ $nasm = $1 + $2*0.01; $PTR=""; }
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elsif (`ml64 2>&1` =~ m/Version ([0-9]+)\.([0-9]+)(\.([0-9]+))?/)
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{ $masm = $1 + $2*2**-16 + $4*2**-32; }
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die "no assembler found on %PATH" if (!($nasm || $masm));
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}
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my $current_segment;
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my $current_function;
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my %globals;
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{ package opcode; # pick up opcodes
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sub re {
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@ -98,7 +100,7 @@ my $current_function;
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if ($self->{op} =~ /^(movz)b.*/) { # movz is pain...
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$self->{op} = $1;
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$self->{sz} = "b";
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} elsif ($self->{op} =~ /call/) {
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} elsif ($self->{op} =~ /call|jmp/) {
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$self->{sz} = ""
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} elsif ($self->{op} =~ /([a-z]{3,})([qlwb])$/) {
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$self->{op} = $1;
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@ -134,8 +136,6 @@ my $current_function;
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"mov rsi,QWORD${PTR}[16+rsp]\n\t";
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}
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$self->{op} .= "DB\t0F3h,0C3h\t\t;repret";
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} elsif ($self->{op} =~ /^j/ && $nasm) {
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$self->{op} .= " NEAR";
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}
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$self->{op};
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}
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@ -176,9 +176,11 @@ my $current_function;
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local *line = shift;
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undef $ret;
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if ($line =~ /^([^\(,]*)\(([%\w,]+)\)/) {
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$self->{label} = $1;
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($self->{base},$self->{index},$self->{scale})=split(/,/,$2);
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# optional * ---vvv--- appears in indirect jmp/call
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if ($line =~ /^(\*?)([^\(,]*)\(([%\w,]+)\)/) {
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$self->{asterisk} = $1;
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$self->{label} = $2;
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($self->{base},$self->{index},$self->{scale})=split(/,/,$3);
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$self->{scale} = 1 if (!defined($self->{scale}));
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$ret = $self;
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$line = substr($line,@+[0]); $line =~ s/^\s+//;
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@ -206,11 +208,11 @@ my $current_function;
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$self->{label} =~ s/([0-9]+\s*[\*\/\%]\s*[0-9]+)/eval($1)/eg;
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if (defined($self->{index})) {
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sprintf "%s(%%%s,%%%s,%d)",
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sprintf "%s%s(%%%s,%%%s,%d)",$self->{asterisk},
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$self->{label},$self->{base},
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$self->{index},$self->{scale};
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} else {
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sprintf "%s(%%%s)", $self->{label},$self->{base};
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sprintf "%s%s(%%%s)", $self->{asterisk},$self->{label},$self->{base};
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}
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} else {
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%szmap = ( b=>"BYTE$PTR", w=>"WORD$PTR", l=>"DWORD$PTR", q=>"QWORD$PTR" );
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@ -218,6 +220,7 @@ my $current_function;
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$self->{label} =~ s/\./\$/g;
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$self->{label} =~ s/0x([0-9a-f]+)/0$1h/ig;
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$self->{label} = "($self->{label})" if ($self->{label} =~ /[\*\+\-\/]/);
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$sz="q" if ($self->{asterisk});
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if (defined($self->{index})) {
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sprintf "%s[%s%s*%d+%s]",$szmap{$sz},
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@ -241,9 +244,11 @@ my $current_function;
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local *line = shift;
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undef $ret;
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if ($line =~ /^%(\w+)/) {
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# optional * ---vvv--- appears in indirect jmp/call
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if ($line =~ /^(\*?)%(\w+)/) {
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bless $self,$class;
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$self->{value} = $1;
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$self->{asterisk} = $1;
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$self->{value} = $2;
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$ret = $self;
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$line = substr($line,@+[0]); $line =~ s/^\s+//;
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}
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@ -266,7 +271,8 @@ my $current_function;
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}
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sub out {
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my $self = shift;
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sprintf $win64?"%s":"%%%s",$self->{value};
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if (!$win64) { sprintf "%s%%%s",$self->{asterisk},$self->{value}; }
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else { $self->{value}; }
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}
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}
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{ package label; # pick up labels, which end with :
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@ -290,11 +296,14 @@ my $current_function;
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if (!$win64) {
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$self->{value};
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} elsif ($self->{value} ne "$current_function->{name}:") {
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$self->{value} .= ":" if ($masm && $ret!~m/^\$/);
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$self->{value};
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} elsif ($current_function->{abi} eq "svr4") {
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my $func = "$current_function->{name}".($nasm?":":"\tPROC")."\n".
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" mov QWORD${PTR}[8+rsp],rdi\t;WIN64 prologue\n".
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" mov QWORD${PTR}[16+rsp],rsi\n";
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my $func = "$current_function->{name}" .
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($nasm ? ":" : "\tPROC $current_function->{scope}") .
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"\n";
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$func .= " mov QWORD${PTR}[8+rsp],rdi\t;WIN64 prologue\n";
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$func .= " mov QWORD${PTR}[16+rsp],rsi\n";
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my $narg = $current_function->{narg};
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$narg=6 if (!defined($narg));
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$func .= " mov rdi,rcx\n" if ($narg>0);
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@ -305,7 +314,8 @@ my $current_function;
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$func .= " mov r9,QWORD${PTR}[48+rsp]\n" if ($narg>5);
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$func .= "\n";
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} else {
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"$current_function->{name}".($nasm?":":"\tPROC");
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"$current_function->{name}".
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($nasm ? ":" : "\tPROC $current_function->{scope}");
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}
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}
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}
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@ -326,7 +336,11 @@ my $current_function;
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}
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sub out {
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my $self = shift;
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$self->{value};
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if ($nasm && opcode->mnemonic()=~m/^j/) {
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"NEAR ".$self->{value};
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} else {
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$self->{value};
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}
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}
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}
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{ package directive; # pick up directives, which start with .
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@ -368,16 +382,12 @@ my $current_function;
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undef $self->{value};
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$line = substr($line,@+[0]); $line =~ s/^\s+//;
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SWITCH: for ($dir) {
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/\.(text)/
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&& do { my $v=undef;
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/\.text/ && do { my $v=undef;
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if ($nasm) {
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$v ="section .$1 code align=64\n";
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$v.="default rel\n";
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$v.="%define PUBLIC global";
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$v="section .text code align=64\n";
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} else {
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$v="$current_segment\tENDS\n" if ($current_segment);
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$current_segment = "_$1\$";
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$current_segment =~ tr/[a-z]/[A-Z]/;
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$current_segment = ".text\$";
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$v.="$current_segment\tSEGMENT ";
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$v.=$masm>=$masmref ? "ALIGN(64)" : "PAGE";
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$v.=" 'CODE'";
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@ -385,20 +395,55 @@ my $current_function;
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$self->{value} = $v;
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last;
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};
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/\.extern/ && do { $self->{value} = "EXTERN\t".$line;
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$self->{value} .= ":BYTE" if (!$nasm);
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/\.data/ && do { my $v=undef;
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if ($nasm) {
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$v="section .data data align=8\n";
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} else {
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$v="$current_segment\tENDS\n" if ($current_segment);
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$current_segment = "_DATA";
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$v.="$current_segment\tSEGMENT";
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}
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$self->{value} = $v;
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last;
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};
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/\.section/ && do { my $v=undef;
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if ($nasm) {
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$v="section $line";
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if ($line=~/\.([px])data/) {
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$v.=" rdata align=";
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$v.=$1 eq "p"? 4 : 8;
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}
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} else {
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$v="$current_segment\tENDS\n" if ($current_segment);
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$v.="$line\tSEGMENT";
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if ($line=~/\.([px])data/) {
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$v.=" READONLY";
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$v.=" ALIGN(".($1 eq "p" ? 4 : 8).")" if ($masm>=$masmref);
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}
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}
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$current_segment = $line;
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$self->{value} = $v;
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last;
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};
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/\.extern/ && do { $self->{value} = "EXTERN\t".$line;
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$self->{value} .= ":NEAR" if ($masm);
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last;
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};
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/\.globl/ && do { $self->{value} = "PUBLIC\t".$line;
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$globals{$line} = $line;
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last;
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};
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/\.globl/ && do { $self->{value} = "PUBLIC\t".$line; last; };
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/\.type/ && do { ($sym,$type,$narg) = split(',',$line);
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if ($type eq "\@function") {
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undef $current_function;
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$current_function->{name} = $sym;
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$current_function->{abi} = "svr4";
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$current_function->{narg} = $narg;
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$current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE";
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} elsif ($type eq "\@abi-omnipotent") {
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undef $current_function;
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$current_function->{name} = $sym;
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$current_function->{scope} = defined($globals{$sym})?"PUBLIC":"PRIVATE";
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}
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last;
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};
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@ -414,8 +459,10 @@ my $current_function;
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my $sz = substr($1,0,1);
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my $last = pop(@arr);
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my $conv = sub { my $var=shift;
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if ($var=~s/0x([0-9a-f]+)/0$1h/i) { $var; }
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else { sprintf"0%Xh",$var; }
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$var=~s/0x([0-9a-f]+)/0$1h/ig;
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if ($current_segment=~/.[px]data/)
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{ $var=~s/\b([_a-z\$\@][_a-z0-9\$\@]*)/$nasm?"$1 wrt ..imagebase":"imagerel $1"/egi; }
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$var;
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};
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$sz =~ tr/bvlq/BWDQ/;
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@ -452,6 +499,16 @@ my $current_function;
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}
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}
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if ($nasm) {
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print <<___;
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default rel
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%define PUBLIC global
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___
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} elsif ($masm) {
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print <<___;
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OPTION DOTNAME
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___
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}
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while($line=<>) {
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chomp($line);
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@ -508,7 +565,7 @@ while($line=<>) {
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print $line,"\n";
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}
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print "\n$current_segment\tENDS\nEND\n" if ($current_segment);
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print "\n$current_segment\tENDS\nEND\n" if ($current_segment && $masm);
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close STDOUT;
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