#!/usr/bin/perl

# Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description:

#

use FindBin;		# for FindBin::Bin

use Getopt::Long;

BEGIN {

# check user has a version of perl that will cope

	require 5.005_03;

# establish the path to the Perl libraries: currently the same directory as this script

	$PerlLibPath = $FindBin::Bin;	# X:/epoc32/tools

	if ($^O eq "MSWin32")

	{

		$PerlLibPath =~ s/\//\\/g;	# X:\epoc32\tools

		$PerlLibPath .= "\\";

	}

}

use lib $PerlLibPath;

my $IgnoreExportDir = 0;

my $ImportSymFile;

my $CppFile;

my $mapFile;

my $SegmentContentSz = 0;

my $nSyms = 0;

my $nImports = 0;

my %Symbols = ();

my @Imports = ();

{

	unless (GetOptions(\%Options, 'sym=s', 'o=s', 'map=s', 'ignore_export_dir')) {

		exit 1;

	}

	$ImportSymFile = $Options{sym};

	$CppFile = $Options{o};

	$mapFile = $Options{map};

	$IgnoreExportDir = $Options{ignore_export_dir};

	ReadSymFile() if $ImportSymFile;

	ReadMapFile() if $mapFile;

	GenNamedSegment();

}

sub ReadMapFile() {

	open FILE, $mapFile or die "Error :SymLookup: Cannot open map file $mapFile\n";

	my $GlbSyms = 0;

	while(<FILE>) {

		if($_ =~ /Public Symbols/) {

			$GlbSyms = 1;

		}

		elsif( !$GlbSyms ) {

			next;

		}

		if($_ =~ /([0-9a-fA-F]{8})\s+(\S+)\s+_?(\S+)\s/){

			$addr = $1;

			$module = $2;

			$name = $3;

			if( defined $Symbols{$name} ) {

				$Symbols{$name} = $addr;

			}

		}

	}

#	Remove symbols not found in map file

	foreach my $sym (keys %Symbols){

		if( !$Symbols{$sym} ){

			delete $Symbols{$sym};

		}

	}

}

sub ReadSymFile() {

	open FILE, $ImportSymFile or die "Error :SymLookup: Cannot open file $ImportSymFile\n";

	my $ImportDirSeen = 0;

	my $ExportDirSeen = 0;

	my $ExportNameTblSeen = 0;

	my $numOfExportNames = 0;

	my $nameCount = 0;

	while (<FILE>) {

# Ignore export table(s) if the flag '$IgnoreExportDir' is set. This flag is set for stddlls, as symbol listing 

# is not required for them. The windows API GetProcAddr can be used directly. While for stdexe, the symbol names

# are filtered out and then looked up in the map file for their addresses.

		if($_ =~ /\*\*\* EXPORT DIRECTORY \*\*\*/){

			next if($IgnoreExportDir);

			$ExportDirSeen = 1;

		}

		elsif($_ =~ /\*\*\* Export Name Pointer Table \*\*\*/){

			next if($IgnoreExportDir);

			$ExportNameTblSeen = 1;

		}

		elsif($_ =~ /\*\*\* IMPORT DIRECTORY \*\*\*/) {

			$ImportDirSeen = 1;

		}

		if($ExportDirSeen){

			if($_ =~ /numberofnames\s+=\s+0x(\S+)/){

				$numOfExportNames = hex($1);

# Reset the flag once done with the export table

				$ExportDirSeen = 0;

			}

		}

		elsif($ExportNameTblSeen && $numOfExportNames){

			if($_ =~ /\d+\s+0x[0-9a-fA-F]+\s+(\S+)/){

				$Symbols{$1}=0;

# Keep track of the symbols seen in "Export Name Pointer Table"

				$nameCount++;

			}

			if($nameCount == $numOfExportNames){

# Reset the flag once done with the name table

				$ExportNameTblSeen = 0;

			}

		}

		elsif($ImportDirSeen) {

			if($_ =~ /^DLL name\s+=\s+\S+\s+\((\S+)\)/) {

				my $dllname = $1;

				push @Imports, $dllname;

				$ImportDirSeen = 0;

			}

		}

	}

}

sub GenNamedSegment() {

	my $SegContents = "";

	&Header(\$SegContents);

	&SymAddrTbl(\$SegContents);

	&SymNames(\$SegContents);

	&Footer(\$SegContents);

	open OUTFILE, ">$CppFile" or die "Error :SymLookup:Cannot open file $CppFile\n";

	print OUTFILE $SegContents;

}

sub Header(){

	my $SegContentsRef = shift @_;

	$$SegContentsRef .= "\/\* $CppFile\n";

	$$SegContentsRef .= " \* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).  All rights reserved.\n";

	$$SegContentsRef .= " \* Makmake-generated source file for named symbol lookup\n";

	$$SegContentsRef .= " \*\/\n";

	$$SegContentsRef .= "#pragma data_seg(\".expdata\")";

	$$SegContentsRef .= "\n\n";

}

sub Footer() {

	my $SegContentsRef = shift @_;

	$$SegContentsRef .= "\n#pragma data_seg()\n";

	$$SegContentsRef .= "\n";

}

sub SymAddrTbl(){

	my $SegContentsRef = shift @_;

	$nSyms = keys %Symbols;

	$nImports = @Imports;

	$$SegContentsRef .= "int NSymbols = $nSyms;\n";

	$$SegContentsRef .= "int NImports = $nImports;\n";

	if(!$nSyms) {

		return;

	}

	$$SegContentsRef .= "int addresses[] = {\n";

	foreach $key (sort keys %Symbols) {

		if($Symbols{$key}){

			$$SegContentsRef .= "\t0x".$Symbols{$key}.",\n";

		}

	}

	$$SegContentsRef .= "};\n";

}

sub SymNames() {

	if(!$nImports && !$nSyms){

		return;

	}

	my $SegContentsRef = shift @_;

	$$SegContentsRef .= "\nchar data[] = {\n";

	my $symnames ;

	my $colCnt ;

	foreach $symnames (sort keys %Symbols) {

		next if( $Symbols{$symnames} == 0);

		my @chars = split(//,$symnames);

		$$SegContentsRef .= "\t";

		$colCnt =0;

		foreach $aChar (@chars) {

			if($colCnt >= 80) {

				$$SegContentsRef .= "\\\n\t";

				$colCnt = 0;

			}

			$$SegContentsRef .= "\'$aChar\',";

			$colCnt += 4;

		}

		$$SegContentsRef .= "0,\n";

	}

	foreach my $dll (@Imports) {

		my @chars = split(//,$dll);

		$$SegContentsRef .= "\t";

		$colCnt =0;

		foreach $aChar (@chars) {

			if($colCnt >= 80) {

				$$SegContentsRef .= "\\\n\t";

				$colCnt = 0;

			}

			$$SegContentsRef .= "\'$aChar\',";

			$colCnt += 4;

		}

		$$SegContentsRef .= "0,\n";

	}

	$$SegContentsRef .= "\n};\n";

}