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#! /usr/bin/env perl
# Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
use strict;
my $flavour = shift;
my $output = shift;
open STDOUT,">$output" || die "can't open $output: $!";
$flavour = "linux32" if (!$flavour or $flavour eq "void");
my %GLOBALS;
my $dotinlocallabels=($flavour=~/linux/)?1:0;
################################################################
# directives which need special treatment on different platforms
################################################################
my $arch = sub {
if ($flavour =~ /linux/) { ".arch\t".join(',',@_); }
else { ""; }
};
my $fpu = sub {
if ($flavour =~ /linux/) { ".fpu\t".join(',',@_); }
else { ""; }
};
my $rodata = sub {
SWITCH: for ($flavour) {
/linux/ && return ".section\t.rodata";
/ios/ && return ".section\t__TEXT,__const";
last;
}
};
my $hidden = sub {
if ($flavour =~ /ios/) { ".private_extern\t".join(',',@_); }
else { ".hidden\t".join(',',@_); }
};
my $comm = sub {
my @args = split(/,\s*/,shift);
my $name = @args[0];
my $global = \$GLOBALS{$name};
my $ret;
if ($flavour =~ /ios32/) {
$ret = ".comm\t_$name,@args[1]\n";
$ret .= ".non_lazy_symbol_pointer\n";
$ret .= "$name:\n";
$ret .= ".indirect_symbol\t_$name\n";
$ret .= ".long\t0";
$name = "_$name";
} else { $ret = ".comm\t".join(',',@args); }
$$global = $name;
$ret;
};
my $globl = sub {
my $name = shift;
my $global = \$GLOBALS{$name};
my $ret;
SWITCH: for ($flavour) {
/ios/ && do { $name = "_$name";
last;
};
}
$ret = ".globl $name" if (!$ret);
$$global = $name;
$ret;
};
my $global = $globl;
my $extern = sub {
&$globl(@_);
return; # return nothing
};
my $type = sub {
if ($flavour =~ /linux/) { ".type\t".join(',',@_); }
elsif ($flavour =~ /ios32/) { if (join(',',@_) =~ /(\w+),%function/) {
"#ifdef __thumb2__\n".
".thumb_func $1\n".
"#endif";
}
}
else { ""; }
};
my $size = sub {
if ($flavour =~ /linux/) { ".size\t".join(',',@_); }
else { ""; }
};
my $inst = sub {
if ($flavour =~ /linux/) { ".inst\t".join(',',@_); }
else { ".long\t".join(',',@_); }
};
my $asciz = sub {
my $line = join(",",@_);
if ($line =~ /^"(.*)"$/)
{ ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; }
else
{ ""; }
};
my $adrp = sub {
my ($args,$comment) = split(m|\s*//|,shift);
"\tadrp\t$args\@PAGE";
} if ($flavour =~ /ios64/);
sub range {
my ($r,$sfx,$start,$end) = @_;
join(",",map("$r$_$sfx",($start..$end)));
}
sub expand_line {
my $line = shift;
my @ret = ();
pos($line)=0;
while ($line =~ m/\G[^@\/\{\"]*/g) {
if ($line =~ m/\G(@|\/\/|$)/gc) {
last;
}
elsif ($line =~ m/\G\{/gc) {
my $saved_pos = pos($line);
$line =~ s/\G([rdqv])([0-9]+)([^\-]*)\-\1([0-9]+)\3/range($1,$3,$2,$4)/e;
pos($line) = $saved_pos;
$line =~ m/\G[^\}]*\}/g;
}
elsif ($line =~ m/\G\"/gc) {
$line =~ m/\G[^\"]*\"/g;
}
}
$line =~ s/\b(\w+)/$GLOBALS{$1} or $1/ge;
if ($flavour =~ /ios64/) {
$line =~ s/#:lo12:(\w+)/$1\@PAGEOFF/;
}
return $line;
}
while(my $line=<>) {
if ($line =~ m/^\s*(#|@|\/\/)/) { print $line; next; }
$line =~ s|/\*.*\*/||; # get rid of C-style comments...
$line =~ s|^\s+||; # ... and skip whitespace in beginning...
$line =~ s|\s+$||; # ... and at the end
{
$line =~ s|[\b\.]L(\w{2,})|L$1|g; # common denominator for Locallabel
$line =~ s|\bL(\w{2,})|\.L$1|g if ($dotinlocallabels);
}
{
$line =~ s|(^[\.\w]+)\:\s*||;
my $label = $1;
if ($label) {
printf "%s:",($GLOBALS{$label} or $label);
}
}
if ($line !~ m/^[#@]/) {
$line =~ s|^\s*(\.?)(\S+)\s*||;
my $c = $1; $c = "\t" if ($c eq "");
my $mnemonic = $2;
my $opcode;
if ($mnemonic =~ m/([^\.]+)\.([^\.]+)/) {
$opcode = eval("\$$1_$2");
} else {
$opcode = eval("\$$mnemonic");
}
my $arg=expand_line($line);
if (ref($opcode) eq 'CODE') {
$line = &$opcode($arg);
} elsif ($mnemonic) {
$line = $c.$mnemonic;
$line.= "\t$arg" if ($arg ne "");
}
}
print $line if ($line);
print "\n";
}
close STDOUT or die "error closing STDOUT: $!";
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