core: fix undefined references to ubsan functions

Add UBSan handlers for `__ubsan_handle_type_mismatch_v1` and `__ubsan_handle_pointer_overflow` to remove the undefined references error.

Signed-off-by: Abhishek Revadekar <abhishek.rvdkr@yahoo.com>

core/arch/arm/kernel/boot.c

@@ -1508,6 +1508,14 @@ unsigned long __weak get_aslr_seed(void)
 		goto err;
 	}
 
+	/* 
+		Checks if seed is 8-byte aligned, and performs alignment if needed.
+		If removed while CFG_CORE_SANITIZE_UNDEFINED is set, it may cause a ubsan panic
+	*/
+	if (((uint64_t)seed & 7) != 0) {
+		seed = (uint64_t *)((unsigned long)seed + (8 - ((unsigned long)seed & 7)));
+	}
+
 	return fdt64_to_cpu(*seed);
 
 err:

core/kernel/ubsan.c

@@ -70,6 +70,8 @@ struct nonnull_arg_data {
  */
 void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
 				  unsigned long ptr);
+void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data *data,
+				  unsigned long ptr);
 void __ubsan_handle_add_overflow(struct overflow_data *data,
 				  unsigned long lhs, unsigned long rhs);
 void __ubsan_handle_sub_overflow(struct overflow_data *data,
@@ -80,6 +82,8 @@ void __ubsan_handle_negate_overflow(struct overflow_data *data,
 				    unsigned long old_val);
 void __ubsan_handle_divrem_overflow(struct overflow_data *data,
 				    unsigned long lhs, unsigned long rhs);
+void __ubsan_handle_pointer_overflow(struct overflow_data *data,
+				    unsigned long old_val);
 void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data,
 					unsigned long lhs, unsigned long rhs);
 void __ubsan_handle_out_of_bounds(struct out_of_bounds_data *data,
@@ -119,6 +123,14 @@ void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
 		panic();
 }
 
+void __ubsan_handle_type_mismatch_v1(struct type_mismatch_data *data,
+				     unsigned long ptr __unused)
+{
+	print_loc(__func__, &data->loc);
+	if (ubsan_panic)
+		panic();
+}
+
 void __ubsan_handle_add_overflow(struct overflow_data *data,
 				 unsigned long lhs __unused,
 				 unsigned long rhs __unused)
@@ -163,6 +175,15 @@ void __ubsan_handle_divrem_overflow(struct overflow_data *data,
 		panic();
 }
 
+void __ubsan_handle_pointer_overflow(struct overflow_data *data,
+				    unsigned long lhs __unused,
+				    unsigned long rhs __unused)
+{
+	print_loc(__func__, &data->loc);
+	if (ubsan_panic)
+		panic();
+}
+
 void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data,
 					unsigned long lhs __unused,
 					unsigned long rhs __unused)