mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-27 08:10:07 +08:00
94ba02fa16
According to XED and experimentation, the 66 is ignored. Signed-off-by: Ben Rudiak-Gould <benrudiak@gmail.com> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
894 lines
27 KiB
Perl
Executable File
894 lines
27 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
## --------------------------------------------------------------------------
|
|
##
|
|
## Copyright 1996-2012 The NASM Authors - All Rights Reserved
|
|
## See the file AUTHORS included with the NASM distribution for
|
|
## the specific copyright holders.
|
|
##
|
|
## Redistribution and use in source and binary forms, with or without
|
|
## modification, are permitted provided that the following
|
|
## conditions are met:
|
|
##
|
|
## * Redistributions of source code must retain the above copyright
|
|
## notice, this list of conditions and the following disclaimer.
|
|
## * Redistributions in binary form must reproduce the above
|
|
## copyright notice, this list of conditions and the following
|
|
## disclaimer in the documentation and/or other materials provided
|
|
## with the distribution.
|
|
##
|
|
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
## CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
## INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
## DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
## NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
## OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
## EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
##
|
|
## --------------------------------------------------------------------------
|
|
|
|
#
|
|
# insns.pl
|
|
#
|
|
# Parse insns.dat and produce generated source code files
|
|
|
|
# Opcode prefixes which need their own opcode tables
|
|
# LONGER PREFIXES FIRST!
|
|
@disasm_prefixes = qw(0F24 0F25 0F38 0F3A 0F7A 0FA6 0FA7 0F);
|
|
|
|
# This should match MAX_OPERANDS from nasm.h
|
|
$MAX_OPERANDS = 5;
|
|
|
|
# Add VEX/XOP prefixes
|
|
@vex_class = ( 'vex', 'xop' );
|
|
$vex_classes = scalar(@vex_class);
|
|
@vexlist = ();
|
|
%vexmap = ();
|
|
for ($c = 0; $c < $vex_classes; $c++) {
|
|
$vexmap{$vex_class[$c]} = $c;
|
|
for ($m = 0; $m < 32; $m++) {
|
|
for ($p = 0; $p < 4; $p++) {
|
|
push(@vexlist, sprintf("%s%02X%01X", $vex_class[$c], $m, $p));
|
|
}
|
|
}
|
|
}
|
|
@disasm_prefixes = (@vexlist, @disasm_prefixes);
|
|
|
|
@bytecode_count = (0) x 256;
|
|
|
|
print STDERR "Reading insns.dat...\n";
|
|
|
|
@args = ();
|
|
undef $output;
|
|
foreach $arg ( @ARGV ) {
|
|
if ( $arg =~ /^\-/ ) {
|
|
if ( $arg =~ /^\-([abdin])$/ ) {
|
|
$output = $1;
|
|
} else {
|
|
die "$0: Unknown option: ${arg}\n";
|
|
}
|
|
} else {
|
|
push (@args, $arg);
|
|
}
|
|
}
|
|
|
|
$fname = "insns.dat" unless $fname = $args[0];
|
|
open (F, $fname) || die "unable to open $fname";
|
|
|
|
%dinstables = ();
|
|
@bytecode_list = ();
|
|
|
|
$line = 0;
|
|
$insns = 0;
|
|
while (<F>) {
|
|
$line++;
|
|
chomp;
|
|
next if ( /^\s*(\;.*|)$/ ); # comments or blank lines
|
|
|
|
unless (/^\s*(\S+)\s+(\S+)\s+(\S+|\[.*\])\s+(\S+)\s*$/) {
|
|
warn "line $line does not contain four fields\n";
|
|
next;
|
|
}
|
|
@fields = ($1, $2, $3, $4);
|
|
@field_list = ([@fields, 0]);
|
|
|
|
if ($fields[1] =~ /\*/) {
|
|
# This instruction has relaxed form(s)
|
|
if ($fields[2] !~ /^\[/) {
|
|
warn "line $line has an * operand but uses raw bytecodes\n";
|
|
next;
|
|
}
|
|
|
|
$opmask = 0;
|
|
@ops = split(/,/, $fields[1]);
|
|
for ($oi = 0; $oi < scalar @ops; $oi++) {
|
|
if ($ops[$oi] =~ /\*$/) {
|
|
if ($oi == 0) {
|
|
warn "line $line has a first operand with a *\n";
|
|
next;
|
|
}
|
|
$opmask |= 1 << $oi;
|
|
}
|
|
}
|
|
|
|
for ($oi = 1; $oi < (1 << scalar @ops); $oi++) {
|
|
if (($oi & ~$opmask) == 0) {
|
|
my @xops = ();
|
|
my $omask = ~$oi;
|
|
for ($oj = 0; $oj < scalar(@ops); $oj++) {
|
|
if ($omask & 1) {
|
|
push(@xops, $ops[$oj]);
|
|
}
|
|
$omask >>= 1;
|
|
}
|
|
push(@field_list, [$fields[0], join(',', @xops),
|
|
$fields[2], $fields[3], $oi]);
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach $fptr (@field_list) {
|
|
@fields = @$fptr;
|
|
($formatted, $nd) = format_insn(@fields);
|
|
if ($formatted) {
|
|
$insns++;
|
|
$aname = "aa_$fields[0]";
|
|
push @$aname, $formatted;
|
|
}
|
|
if ( $fields[0] =~ /cc$/ ) {
|
|
# Conditional instruction
|
|
$k_opcodes_cc{$fields[0]}++;
|
|
} else {
|
|
# Unconditional instruction
|
|
$k_opcodes{$fields[0]}++;
|
|
}
|
|
if ($formatted && !$nd) {
|
|
push @big, $formatted;
|
|
my @sseq = startseq($fields[2], $fields[4]);
|
|
foreach $i (@sseq) {
|
|
if (!defined($dinstables{$i})) {
|
|
$dinstables{$i} = [];
|
|
}
|
|
push(@{$dinstables{$i}}, $#big);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
close F;
|
|
|
|
#
|
|
# Generate the bytecode array. At this point, @bytecode_list contains
|
|
# the full set of bytecodes.
|
|
#
|
|
|
|
# Sort by descending length
|
|
@bytecode_list = sort { scalar(@$b) <=> scalar(@$a) } @bytecode_list;
|
|
@bytecode_array = ();
|
|
%bytecode_pos = ();
|
|
$bytecode_next = 0;
|
|
foreach $bl (@bytecode_list) {
|
|
my $h = hexstr(@$bl);
|
|
next if (defined($bytecode_pos{$h}));
|
|
|
|
push(@bytecode_array, $bl);
|
|
while ($h ne '') {
|
|
$bytecode_pos{$h} = $bytecode_next;
|
|
$h = substr($h, 2);
|
|
$bytecode_next++;
|
|
}
|
|
}
|
|
undef @bytecode_list;
|
|
|
|
@opcodes = sort keys(%k_opcodes);
|
|
@opcodes_cc = sort keys(%k_opcodes_cc);
|
|
|
|
if ( !defined($output) || $output eq 'b') {
|
|
print STDERR "Writing insnsb.c...\n";
|
|
|
|
open B, ">insnsb.c";
|
|
|
|
print B "/* This file auto-generated from insns.dat by insns.pl" .
|
|
" - don't edit it */\n\n";
|
|
|
|
print B "#include \"nasm.h\"\n";
|
|
print B "#include \"insns.h\"\n\n";
|
|
|
|
print B "const uint8_t nasm_bytecodes[$bytecode_next] = {\n";
|
|
|
|
$p = 0;
|
|
foreach $bl (@bytecode_array) {
|
|
printf B " /* %5d */ ", $p;
|
|
foreach $d (@$bl) {
|
|
printf B "%#o,", $d;
|
|
$p++;
|
|
}
|
|
printf B "\n";
|
|
}
|
|
print B "};\n";
|
|
|
|
print B "\n";
|
|
print B "/*\n";
|
|
print B " * Bytecode frequencies (including reuse):\n";
|
|
print B " *\n";
|
|
for ($i = 0; $i < 32; $i++) {
|
|
print B " *";
|
|
for ($j = 0; $j < 256; $j += 32) {
|
|
print B " |" if ($j);
|
|
printf B " %3o:%4d", $i+$j, $bytecode_count[$i+$j];
|
|
}
|
|
print B "\n";
|
|
}
|
|
print B " */\n";
|
|
|
|
close B;
|
|
}
|
|
|
|
if ( !defined($output) || $output eq 'a' ) {
|
|
print STDERR "Writing insnsa.c...\n";
|
|
|
|
open A, ">insnsa.c";
|
|
|
|
print A "/* This file auto-generated from insns.dat by insns.pl" .
|
|
" - don't edit it */\n\n";
|
|
|
|
print A "#include \"nasm.h\"\n";
|
|
print A "#include \"insns.h\"\n\n";
|
|
|
|
foreach $i (@opcodes, @opcodes_cc) {
|
|
print A "static const struct itemplate instrux_${i}[] = {\n";
|
|
$aname = "aa_$i";
|
|
foreach $j (@$aname) {
|
|
print A " ", codesubst($j), "\n";
|
|
}
|
|
print A " ITEMPLATE_END\n};\n\n";
|
|
}
|
|
print A "const struct itemplate * const nasm_instructions[] = {\n";
|
|
foreach $i (@opcodes, @opcodes_cc) {
|
|
print A " instrux_${i},\n";
|
|
}
|
|
print A "};\n";
|
|
|
|
close A;
|
|
}
|
|
|
|
if ( !defined($output) || $output eq 'd' ) {
|
|
print STDERR "Writing insnsd.c...\n";
|
|
|
|
open D, ">insnsd.c";
|
|
|
|
print D "/* This file auto-generated from insns.dat by insns.pl" .
|
|
" - don't edit it */\n\n";
|
|
|
|
print D "#include \"nasm.h\"\n";
|
|
print D "#include \"insns.h\"\n\n";
|
|
|
|
print D "static const struct itemplate instrux[] = {\n";
|
|
$n = 0;
|
|
foreach $j (@big) {
|
|
printf D " /* %4d */ %s\n", $n++, codesubst($j);
|
|
}
|
|
print D "};\n";
|
|
|
|
foreach $h (sort(keys(%dinstables))) {
|
|
next if ($h eq ''); # Skip pseudo-instructions
|
|
print D "\nstatic const struct itemplate * const itable_${h}[] = {\n";
|
|
foreach $j (@{$dinstables{$h}}) {
|
|
print D " instrux + $j,\n";
|
|
}
|
|
print D "};\n";
|
|
}
|
|
|
|
@prefix_list = ();
|
|
foreach $h (@disasm_prefixes, '') {
|
|
for ($c = 0; $c < 256; $c++) {
|
|
$nn = sprintf("%s%02X", $h, $c);
|
|
if ($is_prefix{$nn} || defined($dinstables{$nn})) {
|
|
# At least one entry in this prefix table
|
|
push(@prefix_list, $h);
|
|
$is_prefix{$h} = 1;
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach $h (@prefix_list) {
|
|
print D "\n";
|
|
print D "static " unless ($h eq '');
|
|
print D "const struct disasm_index ";
|
|
print D ($h eq '') ? 'itable' : "itable_$h";
|
|
print D "[256] = {\n";
|
|
for ($c = 0; $c < 256; $c++) {
|
|
$nn = sprintf("%s%02X", $h, $c);
|
|
if ($is_prefix{$nn}) {
|
|
die "$fname: ambiguous decoding of $nn\n"
|
|
if (defined($dinstables{$nn}));
|
|
printf D " /* 0x%02x */ { itable_%s, -1 },\n", $c, $nn;
|
|
} elsif (defined($dinstables{$nn})) {
|
|
printf D " /* 0x%02x */ { itable_%s, %u },\n", $c,
|
|
$nn, scalar(@{$dinstables{$nn}});
|
|
} else {
|
|
printf D " /* 0x%02x */ { NULL, 0 },\n", $c;
|
|
}
|
|
}
|
|
print D "};\n";
|
|
}
|
|
|
|
printf D "\nconst struct disasm_index * const itable_vex[%d][32][4] =\n",
|
|
$vex_classes;
|
|
print D "{\n";
|
|
for ($c = 0; $c < $vex_classes; $c++) {
|
|
print D " {\n";
|
|
for ($m = 0; $m < 32; $m++) {
|
|
print D " { ";
|
|
for ($p = 0; $p < 4; $p++) {
|
|
$vp = sprintf("%s%02X%01X", $vex_class[$c], $m, $p);
|
|
printf D "%-15s",
|
|
($is_prefix{$vp} ? sprintf("itable_%s,", $vp) : 'NULL,');
|
|
}
|
|
print D "},\n";
|
|
}
|
|
print D " },\n";
|
|
}
|
|
print D "};\n";
|
|
|
|
close D;
|
|
}
|
|
|
|
if ( !defined($output) || $output eq 'i' ) {
|
|
print STDERR "Writing insnsi.h...\n";
|
|
|
|
open I, ">insnsi.h";
|
|
|
|
print I "/* This file is auto-generated from insns.dat by insns.pl" .
|
|
" - don't edit it */\n\n";
|
|
print I "/* This file in included by nasm.h */\n\n";
|
|
|
|
print I "/* Instruction names */\n\n";
|
|
print I "#ifndef NASM_INSNSI_H\n";
|
|
print I "#define NASM_INSNSI_H 1\n\n";
|
|
print I "enum opcode {\n";
|
|
$maxlen = 0;
|
|
foreach $i (@opcodes, @opcodes_cc) {
|
|
print I "\tI_${i},\n";
|
|
$len = length($i);
|
|
$len++ if ( $i =~ /cc$/ ); # Condition codes can be 3 characters long
|
|
$maxlen = $len if ( $len > $maxlen );
|
|
}
|
|
print I "\tI_none = -1\n";
|
|
print I "};\n\n";
|
|
print I "#define MAX_INSLEN ", $maxlen, "\n";
|
|
print I "#define FIRST_COND_OPCODE I_", $opcodes_cc[0], "\n\n";
|
|
print I "#endif /* NASM_INSNSI_H */\n";
|
|
|
|
close I;
|
|
}
|
|
|
|
if ( !defined($output) || $output eq 'n' ) {
|
|
print STDERR "Writing insnsn.c...\n";
|
|
|
|
open N, ">insnsn.c";
|
|
|
|
print N "/* This file is auto-generated from insns.dat by insns.pl" .
|
|
" - don't edit it */\n\n";
|
|
print N "#include \"tables.h\"\n\n";
|
|
|
|
print N "const char * const nasm_insn_names[] = {";
|
|
$first = 1;
|
|
foreach $i (@opcodes, @opcodes_cc) {
|
|
print N "," if ( !$first );
|
|
$first = 0;
|
|
$ilower = $i;
|
|
$ilower =~ s/cc$//; # Remove conditional cc suffix
|
|
$ilower =~ tr/A-Z/a-z/; # Change to lower case (Perl 4 compatible)
|
|
print N "\n\t\"${ilower}\"";
|
|
}
|
|
print N "\n};\n";
|
|
close N;
|
|
}
|
|
|
|
printf STDERR "Done: %d instructions\n", $insns;
|
|
|
|
# Count primary bytecodes, for statistics
|
|
sub count_bytecodes(@) {
|
|
my $skip = 0;
|
|
foreach my $bc (@_) {
|
|
if ($skip) {
|
|
$skip--;
|
|
next;
|
|
}
|
|
$bytecode_count[$bc]++;
|
|
if ($bc >= 01 && $bc <= 04) {
|
|
$skip = $bc;
|
|
} elsif (($bc & ~03) == 010) {
|
|
$skip = 1;
|
|
} elsif (($bc & ~013) == 0144) {
|
|
$skip = 1;
|
|
} elsif ($bc == 0172 || $bc == 0173) {
|
|
$skip = 1;
|
|
} elsif ($bc >= 0260 && $bc <= 0270) {
|
|
$skip = 2;
|
|
} elsif ($bc == 0330) {
|
|
$skip = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
sub format_insn($$$$$) {
|
|
my ($opcode, $operands, $codes, $flags, $relax) = @_;
|
|
my $num, $nd = 0;
|
|
my @bytecode;
|
|
my $op, @ops, $opp, @opx, @oppx;
|
|
|
|
return (undef, undef) if $operands eq "ignore";
|
|
|
|
# format the operands
|
|
$operands =~ s/\*//g;
|
|
$operands =~ s/:/|colon,/g;
|
|
@ops = ();
|
|
if ($operands ne 'void') {
|
|
foreach $op (split(/,/, $operands)) {
|
|
@opx = ();
|
|
foreach $opp (split(/\|/, $op)) {
|
|
@oppx = ();
|
|
if ($opp =~ s/(?<=\D)(8|16|32|64|80|128|256)$//) {
|
|
push(@oppx, "bits$1");
|
|
}
|
|
$opp =~ s/^mem$/memory/;
|
|
$opp =~ s/^memory_offs$/mem_offs/;
|
|
$opp =~ s/^imm$/immediate/;
|
|
$opp =~ s/^([a-z]+)rm$/rm_$1/;
|
|
$opp =~ s/^rm$/rm_gpr/;
|
|
$opp =~ s/^reg$/reg_gpr/;
|
|
push(@opx, $opp, @oppx);
|
|
}
|
|
$op = join('|', @opx);
|
|
push(@ops, $op);
|
|
}
|
|
}
|
|
|
|
$num = scalar(@ops);
|
|
while (scalar(@ops) < $MAX_OPERANDS) {
|
|
push(@ops, '0');
|
|
}
|
|
$operands = join(',', @ops);
|
|
$operands =~ tr/a-z/A-Z/;
|
|
|
|
# format the flags
|
|
$flags =~ s/,/|IF_/g;
|
|
$flags =~ s/(\|IF_ND|IF_ND\|)//, $nd = 1 if $flags =~ /IF_ND/;
|
|
$flags = "IF_" . $flags;
|
|
|
|
@bytecode = (decodify($codes, $relax), 0);
|
|
push(@bytecode_list, [@bytecode]);
|
|
$codes = hexstr(@bytecode);
|
|
count_bytecodes(@bytecode);
|
|
|
|
("{I_$opcode, $num, {$operands}, \@\@CODES-$codes\@\@, $flags},", $nd);
|
|
}
|
|
|
|
#
|
|
# Look for @@CODES-xxx@@ sequences and replace them with the appropriate
|
|
# offset into nasm_bytecodes
|
|
#
|
|
sub codesubst($) {
|
|
my($s) = @_;
|
|
my $n;
|
|
|
|
while ($s =~ /\@\@CODES-([0-9A-F]+)\@\@/) {
|
|
my $pos = $bytecode_pos{$1};
|
|
if (!defined($pos)) {
|
|
die "$fname: no position assigned to byte code $1\n";
|
|
}
|
|
$s = $` . "nasm_bytecodes+${pos}" . "$'";
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
sub addprefix ($@) {
|
|
my ($prefix, @list) = @_;
|
|
my $x;
|
|
my @l = ();
|
|
|
|
foreach $x (@list) {
|
|
push(@l, sprintf("%s%02X", $prefix, $x));
|
|
}
|
|
|
|
return @l;
|
|
}
|
|
|
|
#
|
|
# Turn a code string into a sequence of bytes
|
|
#
|
|
sub decodify($$) {
|
|
# Although these are C-syntax strings, by convention they should have
|
|
# only octal escapes (for directives) and hexadecimal escapes
|
|
# (for verbatim bytes)
|
|
my($codestr, $relax) = @_;
|
|
|
|
if ($codestr =~ /^\s*\[([^\]]*)\]\s*$/) {
|
|
return byte_code_compile($1, $relax);
|
|
}
|
|
|
|
my $c = $codestr;
|
|
my @codes = ();
|
|
|
|
unless ($codestr eq 'ignore') {
|
|
while ($c ne '') {
|
|
if ($c =~ /^\\x([0-9a-f]+)(.*)$/i) {
|
|
push(@codes, hex $1);
|
|
$c = $2;
|
|
next;
|
|
} elsif ($c =~ /^\\([0-7]{1,3})(.*)$/) {
|
|
push(@codes, oct $1);
|
|
$c = $2;
|
|
next;
|
|
} else {
|
|
die "$fname: unknown code format in \"$codestr\"\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
return @codes;
|
|
}
|
|
|
|
# Turn a numeric list into a hex string
|
|
sub hexstr(@) {
|
|
my $s = '';
|
|
my $c;
|
|
|
|
foreach $c (@_) {
|
|
$s .= sprintf("%02X", $c);
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
# Here we determine the range of possible starting bytes for a given
|
|
# instruction. We need only consider the codes:
|
|
# \[1234] mean literal bytes, of course
|
|
# \1[0123] mean byte plus register value
|
|
# \330 means byte plus condition code
|
|
# \0 or \340 mean give up and return empty set
|
|
# \34[4567] mean PUSH/POP of segment registers: special case
|
|
# \17[234] skip is4 control byte
|
|
# \26x \270 skip VEX control bytes
|
|
sub startseq($$) {
|
|
my ($codestr, $relax) = @_;
|
|
my $word, @range;
|
|
my @codes = ();
|
|
my $c = $codestr;
|
|
my $c0, $c1, $i;
|
|
my $prefix = '';
|
|
|
|
@codes = decodify($codestr, $relax);
|
|
|
|
while ($c0 = shift(@codes)) {
|
|
$c1 = $codes[0];
|
|
if ($c0 >= 01 && $c0 <= 04) {
|
|
# Fixed byte string
|
|
my $fbs = $prefix;
|
|
while (1) {
|
|
if ($c0 >= 01 && $c0 <= 04) {
|
|
while ($c0--) {
|
|
$fbs .= sprintf("%02X", shift(@codes));
|
|
}
|
|
} else {
|
|
last;
|
|
}
|
|
$c0 = shift(@codes);
|
|
}
|
|
|
|
foreach $pfx (@disasm_prefixes) {
|
|
if (substr($fbs, 0, length($pfx)) eq $pfx) {
|
|
$prefix = $pfx;
|
|
$fbs = substr($fbs, length($pfx));
|
|
last;
|
|
}
|
|
}
|
|
|
|
if ($fbs ne '') {
|
|
return ($prefix.substr($fbs,0,2));
|
|
}
|
|
|
|
unshift(@codes, $c0);
|
|
} elsif ($c0 >= 010 && $c0 <= 013) {
|
|
return addprefix($prefix, $c1..($c1+7));
|
|
} elsif (($c0 & ~013) == 0144) {
|
|
return addprefix($prefix, $c1, $c1|2);
|
|
} elsif ($c0 == 0330) {
|
|
return addprefix($prefix, $c1..($c1+15));
|
|
} elsif ($c0 == 0 || $c0 == 0340) {
|
|
return $prefix;
|
|
} elsif (($c0 & ~3) == 0260 || $c0 == 0270) {
|
|
my $c,$m,$wlp;
|
|
$m = shift(@codes);
|
|
$wlp = shift(@codes);
|
|
$c = ($m >> 6);
|
|
$m = $m & 31;
|
|
$prefix .= sprintf('%s%02X%01X', $vex_class[$c], $m, $wlp & 3);
|
|
} elsif ($c0 >= 0172 && $c0 <= 173) {
|
|
shift(@codes); # Skip is4 control byte
|
|
} else {
|
|
# We really need to be able to distinguish "forbidden"
|
|
# and "ignorable" codes here
|
|
}
|
|
}
|
|
return $prefix;
|
|
}
|
|
|
|
#
|
|
# This function takes a series of byte codes in a format which is more
|
|
# typical of the Intel documentation, and encode it.
|
|
#
|
|
# The format looks like:
|
|
#
|
|
# [operands: opcodes]
|
|
#
|
|
# The operands word lists the order of the operands:
|
|
#
|
|
# r = register field in the modr/m
|
|
# m = modr/m
|
|
# v = VEX "v" field
|
|
# i = immediate
|
|
# s = register field of is4/imz2 field
|
|
# - = implicit (unencoded) operand
|
|
#
|
|
# For an operand that should be filled into more than one field,
|
|
# enter it as e.g. "r+v".
|
|
#
|
|
sub byte_code_compile($$) {
|
|
my($str, $relax) = @_;
|
|
my $opr;
|
|
my $opc;
|
|
my @codes = ();
|
|
my $litix = undef;
|
|
my %oppos = ();
|
|
my $i;
|
|
my $op, $oq;
|
|
my $opex;
|
|
|
|
my %imm_codes = (
|
|
'ib' => 020, # imm8
|
|
'ib,u' => 024, # Unsigned imm8
|
|
'iw' => 030, # imm16
|
|
'ib,s' => 0274, # imm8 sign-extended to opsize or bits
|
|
'iwd' => 034, # imm16 or imm32, depending on opsize
|
|
'id' => 040, # imm32
|
|
'id,s' => 0254, # imm32 sign-extended to 64 bits
|
|
'iwdq' => 044, # imm16/32/64, depending on addrsize
|
|
'rel8' => 050,
|
|
'iq' => 054,
|
|
'rel16' => 060,
|
|
'rel' => 064, # 16 or 32 bit relative operand
|
|
'rel32' => 070,
|
|
'seg' => 074,
|
|
);
|
|
my %plain_codes = (
|
|
'o16' => 0320, # 16-bit operand size
|
|
'o32' => 0321, # 32-bit operand size
|
|
'odf' => 0322, # Operand size is default
|
|
'o64' => 0324, # 64-bit operand size requiring REX.W
|
|
'o64nw' => 0323, # Implied 64-bit operand size (no REX.W)
|
|
'a16' => 0310,
|
|
'a32' => 0311,
|
|
'adf' => 0312, # Address size is default
|
|
'a64' => 0313,
|
|
'!osp' => 0364,
|
|
'!asp' => 0365,
|
|
'f2i' => 0332, # F2 prefix, but 66 for operand size is OK
|
|
'f3i' => 0333, # F3 prefix, but 66 for operand size is OK
|
|
'mustrep' => 0336,
|
|
'mustrepne' => 0337,
|
|
'rex.l' => 0334,
|
|
'norexb' => 0314,
|
|
'norexx' => 0315,
|
|
'norexr' => 0316,
|
|
'norexw' => 0317,
|
|
'repe' => 0335,
|
|
'nohi' => 0325, # Use spl/bpl/sil/dil even without REX
|
|
'nof3' => 0326, # No REP 0xF3 prefix permitted
|
|
'norep' => 0331, # No REP prefix permitted
|
|
'wait' => 0341, # Needs a wait prefix
|
|
'resb' => 0340,
|
|
'jcc8' => 0370, # Match only if Jcc possible with single byte
|
|
'jmp8' => 0371, # Match only if JMP possible with single byte
|
|
'jlen' => 0373, # Length of jump
|
|
'hlexr' => 0271,
|
|
'hlenl' => 0272,
|
|
'hle' => 0273,
|
|
|
|
# This instruction takes XMM VSIB
|
|
'vsibx' => 0374,
|
|
'vm32x' => 0374,
|
|
'vm64x' => 0374,
|
|
|
|
# This instruction takes YMM VSIB
|
|
'vsiby' => 0375,
|
|
'vm32y' => 0375,
|
|
'vm64y' => 0375
|
|
);
|
|
|
|
unless ($str =~ /^(([^\s:]*)\:|)\s*(.*\S)\s*$/) {
|
|
die "$fname: $line: cannot parse: [$str]\n";
|
|
}
|
|
$opr = "\L$2";
|
|
$opc = "\L$3";
|
|
|
|
my $op = 0;
|
|
for ($i = 0; $i < length($opr); $i++) {
|
|
my $c = substr($opr,$i,1);
|
|
if ($c eq '+') {
|
|
$op--;
|
|
} else {
|
|
if ($relax & 1) {
|
|
$op--;
|
|
}
|
|
$relax >>= 1;
|
|
$oppos{$c} = $op++;
|
|
}
|
|
}
|
|
|
|
my $last_imm = 'h';
|
|
my $prefix_ok = 1;
|
|
foreach $op (split(/\s*(?:\s|(?=[\/\\]))/, $opc)) {
|
|
my $pc = $plain_codes{$op};
|
|
|
|
if (defined $pc) {
|
|
# Plain code
|
|
push(@codes, $pc);
|
|
} elsif ($prefix_ok && $op =~ /^(66|f2|f3|np)$/) {
|
|
# 66/F2/F3 prefix used as an opcode extension, or np = no prefix
|
|
if ($op eq '66') {
|
|
push(@codes, 0361);
|
|
} elsif ($op eq 'f2') {
|
|
push(@codes, 0332);
|
|
} elsif ($op eq 'f3') {
|
|
push(@codes, 0333);
|
|
} else {
|
|
push(@codes, 0360);
|
|
}
|
|
} elsif ($op =~ /^[0-9a-f]{2}$/) {
|
|
if (defined($litix) && $litix+$codes[$litix]+1 == scalar @codes &&
|
|
$codes[$litix] < 4) {
|
|
$codes[$litix]++;
|
|
push(@codes, hex $op);
|
|
} else {
|
|
$litix = scalar(@codes);
|
|
push(@codes, 01, hex $op);
|
|
}
|
|
$prefix_ok = 0;
|
|
} elsif ($op eq '/r') {
|
|
if (!defined($oppos{'r'}) || !defined($oppos{'m'})) {
|
|
die "$fname: $line: $op requires r and m operands\n";
|
|
}
|
|
$opex = (($oppos{'m'} & 4) ? 06 : 0) |
|
|
(($oppos{'r'} & 4) ? 05 : 0);
|
|
push(@codes, $opex) if ($opex);
|
|
push(@codes, 0100 + (($oppos{'m'} & 3) << 3) + ($oppos{'r'} & 3));
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ m:^/([0-7])$:) {
|
|
if (!defined($oppos{'m'})) {
|
|
die "$fname: $line: $op requires m operand\n";
|
|
}
|
|
push(@codes, 06) if ($oppos{'m'} & 4);
|
|
push(@codes, 0200 + (($oppos{'m'} & 3) << 3) + $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^(vex|xop)(|\..*)$/) {
|
|
my $c = $vexmap{$1};
|
|
my ($m,$w,$l,$p) = (undef,2,undef,0);
|
|
my $has_nds = 0;
|
|
my @subops = split(/\./, $op);
|
|
shift @subops; # Drop prefix
|
|
foreach $oq (@subops) {
|
|
if ($oq eq '128' || $oq eq 'l0' || $oq eq 'lz') {
|
|
$l = 0;
|
|
} elsif ($oq eq '256' || $oq eq 'l1') {
|
|
$l = 1;
|
|
} elsif ($oq eq 'lig') {
|
|
$l = 2;
|
|
} elsif ($oq eq 'w0') {
|
|
$w = 0;
|
|
} elsif ($oq eq 'w1') {
|
|
$w = 1;
|
|
} elsif ($oq eq 'wig') {
|
|
$w = 2;
|
|
} elsif ($oq eq 'ww') {
|
|
$w = 3;
|
|
} elsif ($oq eq 'p0') {
|
|
$p = 0;
|
|
} elsif ($oq eq '66' || $oq eq 'p1') {
|
|
$p = 1;
|
|
} elsif ($oq eq 'f3' || $oq eq 'p2') {
|
|
$p = 2;
|
|
} elsif ($oq eq 'f2' || $oq eq 'p3') {
|
|
$p = 3;
|
|
} elsif ($oq eq '0f') {
|
|
$m = 1;
|
|
} elsif ($oq eq '0f38') {
|
|
$m = 2;
|
|
} elsif ($oq eq '0f3a') {
|
|
$m = 3;
|
|
} elsif ($oq =~ /^m([0-9]+)$/) {
|
|
$m = $1+0;
|
|
} elsif ($oq eq 'nds' || $oq eq 'ndd' || $oq eq 'dds') {
|
|
if (!defined($oppos{'v'})) {
|
|
die "$fname: $line: vex.$oq without 'v' operand\n";
|
|
}
|
|
$has_nds = 1;
|
|
} else {
|
|
die "$fname: $line: undefined VEX subcode: $oq\n";
|
|
}
|
|
}
|
|
if (!defined($m) || !defined($w) || !defined($l) || !defined($p)) {
|
|
die "$fname: $line: missing fields in VEX specification\n";
|
|
}
|
|
if (defined($oppos{'v'}) && !$has_nds) {
|
|
die "$fname: $line: 'v' operand without vex.nds or vex.ndd\n";
|
|
}
|
|
push(@codes, defined($oppos{'v'}) ? 0260+($oppos{'v'} & 3) : 0270,
|
|
($c << 6)+$m, ($w << 4)+($l << 2)+$p);
|
|
$prefix_ok = 0;
|
|
} elsif (defined $imm_codes{$op}) {
|
|
if ($op eq 'seg') {
|
|
if ($last_imm lt 'i') {
|
|
die "$fname: $line: seg without an immediate operand\n";
|
|
}
|
|
} else {
|
|
$last_imm++;
|
|
if ($last_imm gt 'j') {
|
|
die "$fname: $line: too many immediate operands\n";
|
|
}
|
|
}
|
|
if (!defined($oppos{$last_imm})) {
|
|
die "$fname: $line: $op without '$last_imm' operand\n";
|
|
}
|
|
push(@codes, 05) if ($oppos{$last_imm} & 4);
|
|
push(@codes, $imm_codes{$op} + ($oppos{$last_imm} & 3));
|
|
$prefix_ok = 0;
|
|
} elsif ($op eq '/is4') {
|
|
if (!defined($oppos{'s'})) {
|
|
die "$fname: $line: $op without 's' operand\n";
|
|
}
|
|
if (defined($oppos{'i'})) {
|
|
push(@codes, 0172, ($oppos{'s'} << 3)+$oppos{'i'});
|
|
} else {
|
|
push(@codes, 05) if ($oppos{'s'} & 4);
|
|
push(@codes, 0174+($oppos{'s'} & 3));
|
|
}
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^\/is4\=([0-9]+)$/) {
|
|
my $imm = $1;
|
|
if (!defined($oppos{'s'})) {
|
|
die "$fname: $line: $op without 's' operand\n";
|
|
}
|
|
if ($imm < 0 || $imm > 15) {
|
|
die "$fname: $line: invalid imm4 value for $op: $imm\n";
|
|
}
|
|
push(@codes, 0173, ($oppos{'s'} << 4) + $imm);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^([0-9a-f]{2})\+c$/) {
|
|
push(@codes, 0330, hex $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^([0-9a-f]{2})\+r$/) {
|
|
if (!defined($oppos{'r'})) {
|
|
die "$fname: $line: $op without 'r' operand\n";
|
|
}
|
|
push(@codes, 05) if ($oppos{'r'} & 4);
|
|
push(@codes, 010 + ($oppos{'r'} & 3), hex $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^\\([0-7]+|x[0-9a-f]{2})$/) {
|
|
# Escape to enter literal bytecodes
|
|
push(@codes, oct $1);
|
|
} else {
|
|
die "$fname: $line: unknown operation: $op\n";
|
|
}
|
|
}
|
|
|
|
return @codes;
|
|
}
|