pass siginfo_t and ucontext_t to signal handlers

stepmania/src/archutils/Unix/SignalHandler.cpp

@@ -50,7 +50,7 @@ SaveSignals::~SaveSignals()
 static void SigHandler( int signal, siginfo_t *si, void *ucp )
 {
 	for(unsigned i = 0; i < handlers.size(); ++i)
-		handlers[i]( signal );
+		handlers[i]( signal, si, (const ucontext_t *) ucp );
 }
 
 static int find_stack_direction2( char *p )

stepmania/src/archutils/Unix/SignalHandler.h

@@ -2,6 +2,7 @@
 #define SIGNAL_HANDLER_H
 
 #include <signal.h>
+#include <ucontext.h>
        
 class SaveSignals
 {
@@ -14,7 +15,7 @@ public:
 
 namespace SignalHandler
 {
-	typedef void (*handler)(int);
+	typedef void (*handler)( int, siginfo_t *si, const ucontext_t *uc );
 
 	void OnClose(handler);
 };