1057 	uint64_t        prevFP;         // can't use a real pointer here until we're a 64 bit kernel  member
1089 	uint64_t prevFP = 0ULL;  local
1100 	uint32_t prevFP = 0U;  local
1150 		prevFP = 0;
1151 		kr = chudxnu_kern_read(&prevFP, (vm_offset_t)currFP, sizeof(currPC));
1154 		if (VALID_STACK_ADDRESS64(TRUE, prevFP, kernStackMin, kernStackMax)) {
1156 		if (VALID_STACK_ADDRESS(TRUE, prevFP, kernStackMin, kernStackMax)) {
1161 		if (prevFP <= currFP) {
1164 			currFP = prevFP;
1188 	uint64_t prevFP = 0ULL;  local
1231 		prevFP = 0;
1237 		prevFP = (uint64_t) tmpWord;    // promote 32 bit address
1239 		if (prevFP) {
1243 		if (prevFP < currFP) {
1246 			currFP = prevFP;
1267 	uint64_t prevFP = 0ULL;  local
1309 		prevFP = 0;
1311 			kr = chudxnu_kern_read(&prevFP, (vm_offset_t)currFP, sizeof(uint64_t));
1313 			kr = chudxnu_task_read(task, &prevFP, currFP, sizeof(uint64_t));
1316 		if (VALID_STACK_ADDRESS64(supervisor, prevFP, kernStackMin, kernStackMax)) {
1320 		if (prevFP < currFP) {
1323 			currFP = prevFP;