/*
* This function is called by the 68k interpreter to handle an emulator trap.
*
* trap_num = number of trap to invoke
* regs = current 68k state
*/
void REGPARAM2 m68k_handle_trap (unsigned int trap_num)
{
struct Trap *trap = &traps[trap_num];
uae_u32 retval = 0;
int has_retval = (trap->flags & TRAPFLAG_NO_RETVAL) == 0;
int implicit_rts = (trap->flags & TRAPFLAG_DORET) != 0;
if (trap->name && trap->name[0] != 0 && trace_traps)
write_log (_T("TRAP: %s\n"), trap->name);
if (trap_num < trap_count) {
if (trap->flags & TRAPFLAG_EXTRA_STACK) {
/* Handle an extended trap.
* Note: the return value of this trap is passed back to 68k
* space via a separate, dedicated simple trap which the trap
* handler causes to be invoked when it is done.
*/
trap_HandleExtendedTrap (trap->handler, has_retval);
} else {
/* Handle simple trap */
retval = (trap->handler) (NULL);
if (has_retval)
m68k_dreg (regs, 0) = retval;
if (implicit_rts) {
m68k_do_rts ();
fill_prefetch ();
}
}
} else
write_log (_T("Illegal emulator trap %d\n"), trap_num);
}
void REGPARAM2 call_calltrap (int func)
{
uae_u32 retval = 0;
int has_retval = (trapmode[func] & TRAPFLAG_NO_RETVAL) == 0;
int implicit_rts = (trapmode[func] & TRAPFLAG_DORET) != 0;
if (trapstr[func] && *trapstr[func] != 0 && trace_traps)
write_log ("TRAP: %s\n", trapstr[func]);
/* For monitoring only? */
if (traps[func] == NULL) {
m68k_setpc (trapoldfunc[func]);
fill_prefetch_slow ();
return;
}
if (func < max_trap) {
#ifdef CAN_DO_STACK_MAGIC
if (trapmode[func] & TRAPFLAG_EXTRA_STACK) {
execute_fn_on_extra_stack(traps[func], has_retval);
return;
}
#endif
retval = (*traps[func])();
} else
write_log ("illegal emulator trap\n");
if (has_retval)
m68k_dreg (regs, 0) = retval;
if (implicit_rts) {
m68k_do_rts ();
fill_prefetch_slow ();
}
}
void REGPARAM2 call_calltrap(int func)
{
uae_u32 retval = 0;
int has_retval = (trapmode[func] & TRAPFLAG_NO_RETVAL) == 0;
int implicit_rts = (trapmode[func] & TRAPFLAG_DORET) != 0;
if (*trapstr[func] != 0 && trace_traps)
write_log ("TRAP: %s\n", trapstr[func]);
/* For monitoring only? */
if (traps[func] == NULL) {
_68k_setpc(trapoldfunc[func]);
fill_prefetch_0 ();
return;
}
if (func < max_trap) {
if (trapmode[func] & TRAPFLAG_EXTRA_STACK) {
execute_fn_on_extra_stack(traps[func], has_retval);
return;
}
retval = (*traps[func])();
} else
write_log ("illegal emulator trap\n");
if (has_retval)
_68k_dreg(0) = retval;
if (implicit_rts) {
#ifndef USE_FAME_CORE
m68k_do_rts ();
#else
/* WinUAE code - m68k_do_rts() */
_68k_setpc(get_long(_68k_areg(7)));
_68k_areg(7) += 4;
/*******************************/
#endif
fill_prefetch_0 ();
}
}
