php log4php dynamically set file:line column

using the apache log4php and its being called by a helper method in my class:

class MyClass{

    function log($msg, $level='info'){
        $log = @Logger::getLogger("MyLogger");
        $log->$level($msg);
    }
}

The issue with the above code is the file:line column in logger will always report the line num for the help method. I can get the original line num and file that calls the helper method using php's debug_backtrace():

$bt = debug_backtrace();
$caller = array_shift($bt);

So my question is, is there a way within my helper method to set the file:line column? I'm thinking that I might need to overwrite a Logger::method or something?

My solution is a hack to the source code, which should be avoided. There is an answer by @Sven that should cover most scenarios but for me my log calls have to go through a helper method.

In the LoggerLoggingEvent.php class file add the method:

/**
 * Set the event location info
 * @param LoggerLocationInfo $locationInfo
 */
public function setLocationInformation(LoggerLocationInfo $locationInfo) {
    $this->locationInfo = $locationInfo;
}

Then in your log class method use:

/**
 * Log an INFO message
 * @param string $msg The message to log
 * @return none
 */
public function log($msg, $level='info'){

    // Manually construct a logging event
    $level = LoggerLevel::toLevel($level);
    $logger = Logger::getLogger(__CLASS__);
    $event = new LoggerLoggingEvent(__CLASS__, $logger, $level, $msg);

    // Override the location info
    $bt = debug_backtrace();
    $caller = array_shift($bt);
    $location = new LoggerLocationInfo($caller);
    $event->setLocationInformation($location);

    // Log it
    $logger->logEvent($event);
}