C++ (Cpp) POP0_16 Examples

Example #1

File: ctrl_trans.c Project: FREEWING-JP/np2pi

void
RETfar16(void)
{
	descriptor_t sd;
	UINT16 new_ip;
	UINT16 new_cs;
	UINT16 sreg;

	CPU_WORKCLOCK(15);
	if (!CPU_STAT_PM || CPU_STAT_VM86) {
		/* Real mode or VM86 mode */
		CPU_SET_PREV_ESP();
		POP0_16(new_ip);
		POP0_16(new_cs);

		/* check new instrunction pointer with new code segment */
		load_segreg(CPU_CS_INDEX, new_cs, &sreg, &sd, GP_EXCEPTION);
		if (new_ip > sd.u.seg.limit) {
			EXCEPTION(GP_EXCEPTION, 0);
		}

		LOAD_SEGREG(CPU_CS_INDEX, new_cs);
		CPU_EIP = new_ip;
		CPU_CLEAR_PREV_ESP();
	} else {
		/* Protected mode */
		RETfar_pm(0);
	}
}

Example #2

File: flag_ctrl.c Project: josejl1987/neko-tracer

void
POPF_Fw(void)
{
	UINT16 flags, mask;

	CPU_WORKCLOCK(3);
	if (!CPU_STAT_PM) {
		/* Real Mode */
		POP0_16(flags);
		mask = I_FLAG|IOPL_FLAG;
	} else if (!CPU_STAT_VM86) {
		/* Protected Mode */
		POP0_16(flags);
		if (CPU_STAT_CPL == 0) {
			mask = I_FLAG|IOPL_FLAG;
		} else if (CPU_STAT_CPL <= CPU_STAT_IOPL) {
			mask = I_FLAG;
		} else {
			mask = 0;
		}
	} else if (CPU_STAT_IOPL == CPU_IOPL3) {
		/* Virtual-8086 Mode, IOPL == 3 */
		POP0_16(flags);
		mask = I_FLAG;
	} else {
		EXCEPTION(GP_EXCEPTION, 0);
		flags = 0;
		mask = 0;
		/* compiler happy */
	}
	set_eflags(flags, mask);
	IRQCHECKTERM();
}

Example #3

File: ctrl_trans.c Project: FREEWING-JP/np2pi

void
IRET(void)
{
	descriptor_t sd;
	UINT32 new_ip;
	UINT32 new_flags;
	UINT32 new_cs;
	UINT32 mask;
	UINT16 sreg;

	CPU_WORKCLOCK(22);
	if (!CPU_STAT_PM) {
		/* Real mode */
		CPU_SET_PREV_ESP();
		mask = I_FLAG|IOPL_FLAG;
		if (!CPU_INST_OP32) {
			POP0_16(new_ip);
			POP0_16(new_cs);
			POP0_16(new_flags);
		} else {
			POP0_32(new_ip);
			POP0_32(new_cs);
			POP0_32(new_flags);
			mask |= RF_FLAG;
		}

		/* check new instrunction pointer with new code segment */
		load_segreg(CPU_CS_INDEX, new_cs, &sreg, &sd, GP_EXCEPTION);
		if (new_ip > sd.u.seg.limit) {
			EXCEPTION(GP_EXCEPTION, 0);
		}

		LOAD_SEGREG(CPU_CS_INDEX, (UINT16)new_cs);
		CPU_EIP = new_ip;

		set_eflags(new_flags, mask);
		CPU_CLEAR_PREV_ESP();
	} else {
		/* Protected mode */
		IRET_pm();
	}
	IRQCHECKTERM();
}

Example #4

File: ctrl_trans.c Project: FREEWING-JP/np2pi

/*
 * RET
 */
void
RETnear16(void)
{
	UINT16 new_ip;

	CPU_WORKCLOCK(11);
	CPU_SET_PREV_ESP();
	POP0_16(new_ip);
	if (new_ip > CPU_STAT_CS_LIMIT) {
		EXCEPTION(GP_EXCEPTION, 0);
	}
	CPU_EIP = new_ip;
	CPU_CLEAR_PREV_ESP();
}

Example #5

File: ctrl_trans.c Project: FREEWING-JP/np2pi

void
LEAVE(void)
{

	CPU_WORKCLOCK(4);

	CPU_SET_PREV_ESP();
	if (!CPU_STAT_SS32) {
		CPU_SP = CPU_BP;
	} else {
		CPU_ESP = CPU_EBP;
	}
	if (!CPU_INST_OP32) {
		POP0_16(CPU_BP);
	} else {
		POP0_32(CPU_EBP);
	}
	CPU_CLEAR_PREV_ESP();
}

Example #6

File: ctrl_trans.c Project: FREEWING-JP/np2pi

void
RETnear16_Iw(void)
{
	UINT16 new_ip;
	UINT16 size;

	CPU_WORKCLOCK(11);
	CPU_SET_PREV_ESP();
	GET_PCWORD(size);
	POP0_16(new_ip);
	if (new_ip > CPU_STAT_CS_LIMIT) {
		EXCEPTION(GP_EXCEPTION, 0);
	}
	CPU_EIP = new_ip;
	if (!CPU_STAT_SS32) {
		CPU_SP += size;
	} else {
		CPU_ESP += size;
	}
	CPU_CLEAR_PREV_ESP();
}