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########################################################################
#
# Copyright (c) 2010, Secure Endpoints Inc.
# All rights reserved.
#
# 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 HOLDER 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.
#
my $show_module_name = 1;
my $use_indent = 1;
my $strip_leading_underscore = 0;
my $always_export = 0;
my $module_name = "";
my $local_prefix = "SHIM_";
my %forward_exports = ();
my %local_exports = ();
sub build_forwarder_target_list($)
{
$fn = shift;
print STDERR "Processing defs from file [$fn]\n";
open(SP, '-|', "dumpbin /exports \"".$fn."\"") or die "Can't open pipe for $fn";
LINE:
while (<SP>) {
# 112 6F 00071CDC krb5_encrypt_size
/^ +([[:digit:]]+)\s+[[:xdigit:]]+\s[[:xdigit:]]{8,}\s+(\S+)(?:| = (\S*))$/ && do {
my ($ordinal, $symbol, $in) = ($1, $2, $3);
if ($in eq "") { $in = $symbol };
$forward_exports{$symbol} = $in;
};
}
close SP;
}
# Dump all symbols for the given dll file that are defined and have
# external scope.
sub build_def_file($)
{
$fn = shift;
print STDERR "Opening dump of DLL [$fn]\n";
open(SP, '-|', "dumpbin /exports \"".$fn."\"") or die "Can't open pipe for $fn";
LINE:
while (<SP>) {
# 112 6F 00071CDC krb5_encrypt_size
/^ +([[:digit:]]+)\s+[[:xdigit:]]+\s[[:xdigit:]]{8,}\s+(\S+)(?:| = (\S*))$/ && do {
my ($ordinal, $symbol, $in) = ($1, $2, $3);
if ($strip_leading_underscore && $symbol =~ /_(.*)/) {
$symbol = $1;
}
if (exists $local_exports{$symbol}) {
print "\t".$symbol;
print " = ".$local_exports{$symbol};
if ($in ne $local_exports{$symbol} and $in ne "") {
print STDERR "Incorrect calling convention for local $symbol\n";
print STDERR " ".$in." != ".$local_exports{$symbol}."\n";
}
print "\t@".$ordinal."\n";
} elsif (exists $local_exports{$local_prefix.$symbol}) {
print "\t".$symbol;
print " = ".$local_exports{$local_prefix.$symbol};
print "\t@".$ordinal."\n";
} elsif (exists $forward_exports{$symbol}) {
print "\t".$symbol;
print " = ".$module_name;
if ($in ne $forward_exports{$symbol} and $in ne "") {
print STDERR "Incorrect calling convention for $symbol\n";
print STDERR " ".$in." != ".$forward_exports{$symbol}."\n";
}
my $texp = $forward_exports{$symbol};
if ($texp =~ /^_([^@]+)$/) { $texp = $1; }
print $texp."\t@".$ordinal."\n";
} elsif ($always_export) {
print "\t".$symbol." = ".$local_prefix.$symbol;
print "\t@".$ordinal."\n";
} else {
print STDERR "Symbol not found: $symbol\n";
}
};
}
close SP;
}
sub build_local_exports_list($)
{
$fn = shift;
print STDERR "Opening dump of object [$fn]\n";
open(SP, '-|', "dumpbin /symbols \"".$fn."\"") or die "Can't open pipe for $fn";
LINE:
while (<SP>) {
# 009 00000010 SECT3 notype () External | _remove_error_table@4
m/^[[:xdigit:]]{3,}\s[[:xdigit:]]{8,}\s(\w+)\s+\w*\s+(?:\(\)| )\s+(\w+)\s+\|\s+(\S+)$/ && do {
my ($section, $visibility, $symbol) = ($1, $2, $3);
if ($section ne "UNDEF" && $visibility eq "External") {
my $exp_name = $symbol;
if ($symbol =~ m/^_(\w+)(?:@.*|)$/) {
$exp_name = $1;
}
if ($symbol =~ m/^_([^@]+)$/) {
$symbol = $1;
}
$local_exports{$exp_name} = $symbol;
}
};
}
close SP;
}
sub process_file($)
{
$fn = shift;
if ($fn =~ m/\.dll$/i) {
build_def_file($fn);
} elsif ($fn =~ m/\.obj$/i) {
build_local_exports_list($fn);
} else {
die "File type not recognized for $fn.";
}
}
sub use_response_file($)
{
$fn = shift;
open (RF, '<', $fn) or die "Can't open response file $fn";
while (<RF>) {
/^(\S+)$/ && do {
process_file($1);
}
}
close RF;
}
print "; This is a generated file. Do not modify directly.\n";
print "EXPORTS\n";
for (@ARGV) {
ARG: {
/^-m(.*)$/ && do {
$module_name = $1.".";
last ARG;
};
/^-l(.*)$/ && do {
$local_prefix = $1."_";
last ARG;
};
/^-a$/ && do {
$always_export = 1;
last ARG;
};
/^-e(.*)$/ && do {
build_forwarder_target_list($1);
last ARG;
};
/^@(.*)$/ && do {
use_response_file($1);
last ARG;
};
process_file($_);
}
}
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