Someone

// and this will crash the emulator

u32 address_to_patch=armcpu_return_pc();
NDS_Pause();
if (armcpu_return_thumbstatus() == 0) {
	MMU_write32(ARM9,address_to_patch,0xE3A02000);
	MMU_write32(ARM9,address_to_patch+4,0xEF040000);
	MMU_write32(ARM9,address_to_patch+8,0xEAFFFFFC);
} else {
	// thumbstuff
}