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#!/usr/bin/perl

use strict;
use warnings;
use FindBin '$Bin';
use File::Temp 'tempfile';

@ARGV == 2 || do {
	die "Usage: $0 <host:port> <executable>\n";
	exit 1;
};

if( opendir SD, "$Bin/../staging_dir" )
{
	my ( $tid, $arch, $libc, @arches );

	if( $ARGV[1] =~ m!\btarget-(.+?)_([^_]+libc[^/]+)\b!i )
	{
		print("Using target $1 ($2)\n");
		($arch, $libc) = ($1, $2);
	}
	else
	{
		# Find arches
		print("Choose target:\n");

		while( defined( my $e = readdir SD ) )
		{
			if( -d "$Bin/../staging_dir/$e" && $e =~ /^target-(.+?)_([^_]+libc.+)/i )
			{
				push @arches, [ $1, $2 ];
				printf(" %2d) %s (%s)\n", @arches + 0, $1, $2);
			}
		}

		if( @arches > 1 )
		{
			# Query arch
			do {
				print("Target? > ");
				chomp($tid = <STDIN>);
			} while( !defined($tid) || $tid !~ /^\d+$/ || $tid < 1 || $tid > @arches );

			($arch, $libc) = @{$arches[$tid-1]};
		}
		else
		{
			($arch, $libc) = @{$arches[0]};
		}
	}

	closedir SD;

	# Find gdb
	my ($gdb) = glob("$Bin/../staging_dir/toolchain-${arch}_*_${libc}*/bin/*-gdb");
	if( defined($gdb) && -x $gdb )
	{
		my ( $fh, $fp ) = tempfile();

		# Find sysroot
		my ($sysroot) = glob("$Bin/../staging_dir/target-${arch}_${libc}/root-*/");

		print $fh "set sysroot $sysroot\n" if $sysroot;
		print $fh "target remote $ARGV[0]\n";

		my $file = -f "$sysroot/$ARGV[1]" ? "$sysroot/$ARGV[1]" : $ARGV[1];
		system($gdb, '-x', $fp, $file);

		close($fh);
		unlink($fp);
	}
	else
	{
		print("No gdb found! Make sure that CONFIG_GDB is set!\n");
		exit(1);
	}
}
else
{
	print("No staging_dir found! You need to compile at least once!\n");
	exit(1);
}