static void cpuFrame2(UWO vector_offset, ULO pc)
{
// save inst address
cpuSetAReg(7, cpuGetAReg(7) - 4);
memoryWriteLong(cpuGetOriginalPC(), cpuGetAReg(7));
cpuFrame4Words(0x2000, vector_offset, pc);
}
void cpuThrowException(ULO vector_offset, ULO pc, BOOLE executejmp)
{
ULO vector_address;
#ifdef CPU_INSTRUCTION_LOGGING
cpuCallExceptionLoggingFunc(cpuGetExceptionName(vector_offset), cpuGetOriginalPC(), cpuGetCurrentOpcode());
#endif
cpuActivateSSP();
cpuStackFrameGenerate((UWO) vector_offset, pc);
// read a memory position
vector_address = memoryReadLong(cpuGetVbr() + vector_offset);
if (cpuGetModelMajor() < 2 && vector_address & 0x1 && vector_offset == 0xc)
{
// Avoid endless loop that will crash the emulator.
// The (odd) address error exception vector contained an odd address.
cpuCallResetExceptionFunc();
cpuHardReset();
cpuSetInstructionTime(132);
}
else
{
// set supervisor modus
cpuSetSR(cpuGetSR() | 0x2000);
cpuSetSR(cpuGetSR() & 0x3fff);
// restart cpu, if needed
cpuSetStop(FALSE);
cpuInitializeFromNewPC(vector_address);
cpuSetInstructionTime(40);
}
// If the exception happened mid-instruction...
if (executejmp)
{
cpuCallMidInstructionExceptionFunc(); // Supposed to be doing setjmp/longjmp back to machine emulator code
}
}
void cpuThrowFLineException(void)
{
// The saved pc points to the f-line instruction
cpuThrowException(0x2c, cpuGetOriginalPC(), FALSE);
}
void cpuThrowIllegalInstructionException(BOOLE executejmp)
{
// The saved pc points to the illegal instruction
cpuThrowException(0x10, cpuGetOriginalPC(), executejmp);
}
void cpuThrowPrivilegeViolationException(void)
{
// The saved pc points to the instruction causing the violation
// (And the kickstart excpects pc in the stack frame to be the opcode PC.)
cpuThrowException(0x20, cpuGetOriginalPC(), FALSE);
}
