859 	uint64_t        prevFP;         // can't use a real pointer here until we're a 64 bit kernel  member
891 	uint64_t prevFP = 0ULL;  local
902 	uint32_t prevFP = 0U;  local
952 		prevFP = 0;
953 		kr = chudxnu_kern_read(&prevFP, (vm_offset_t)currFP, sizeof(currPC));
956 		if (VALID_STACK_ADDRESS64(TRUE, prevFP, kernStackMin, kernStackMax)) {
958 		if (VALID_STACK_ADDRESS(TRUE, prevFP, kernStackMin, kernStackMax)) {
963 		if (prevFP <= currFP) {
966 			currFP = prevFP;
990 	uint64_t prevFP = 0ULL;  local
1033 		prevFP = 0;
1039 		prevFP = (uint64_t) tmpWord;    // promote 32 bit address
1041 		if (prevFP) {
1045 		if (prevFP < currFP) {
1048 			currFP = prevFP;
1069 	uint64_t prevFP = 0ULL;  local
1111 		prevFP = 0;
1113 			kr = chudxnu_kern_read(&prevFP, (vm_offset_t)currFP, sizeof(uint64_t));
1115 			kr = chudxnu_task_read(task, &prevFP, currFP, sizeof(uint64_t));
1118 		if (VALID_STACK_ADDRESS64(supervisor, prevFP, kernStackMin, kernStackMax)) {
1122 		if (prevFP < currFP) {
1125 			currFP = prevFP;