+ int maxBacktraceDistance = 6;
+ tRegs *regs = NULL;
+ Uint32 *stack;
+
+ if( Thread->CurCPU != GetCPUNum() ) {
+ Log(" Currently running");
+ return ;
+ }
+
+ // Backtrace to find the IRQ entrypoint
+ // - This will usually only be called by an IRQ, so this should
+ // work
+ __asm__ __volatile__ ("mov %%ebp, %0" : "=r" (stack));
+ while( maxBacktraceDistance -- )
+ {
+ // [ebp] = oldEbp
+ // [ebp+4] = retaddr
+
+ if( stack[1] == (tVAddr)&IRQCommon_handled ) {
+ regs = (void*)stack[2];
+ break;
+ }
+
+ stack = (void*)stack[0];
+ }
+
+ if( !regs ) {
+ Log(" Unable to find IRQ Entry");
+ return ;
+ }
+
+ Log(" at %04x:%08x", regs->cs, regs->eip);