1 /** 2 * Utility functions to assist in generating psuedo-random CPER sections. 3 * 4 * Author: Lawrence.Tang@arm.com 5 **/ 6 #include <stdlib.h> 7 #include <time.h> 8 #include "../edk/BaseTypes.h" 9 #include "gen-utils.h" 10 11 //Generates a random section of the given byte size, saving the result to the given location. 12 //Returns the length of the section as passed in. 13 size_t generate_random_section(void** location, size_t size) 14 { 15 *location = generate_random_bytes(size); 16 return size; 17 } 18 19 //Generates a random byte allocation of the given size. 20 UINT8* generate_random_bytes(size_t size) 21 { 22 UINT8* bytes = malloc(size); 23 for (size_t i = 0; i < size; i++) 24 bytes[i] = rand(); 25 return bytes; 26 } 27 28 //Creates a valid common CPER error section, given the start of the error section. 29 //Clears reserved bits. 30 void create_valid_error_section(UINT8* start) 31 { 32 //Fix reserved bits. 33 UINT64* error_section = (UINT64*)start; 34 *error_section &= ~0xFF; //Reserved bits 0-7. 35 *error_section &= 0x7FFFFF; //Reserved bits 23-63 36 37 //Ensure error type has a valid value. 38 *(start + 1) = CPER_ERROR_TYPES_KEYS[rand() % (sizeof(CPER_ERROR_TYPES_KEYS) / sizeof(int))]; 39 } 40 41 //Initializes the random seed for rand() using the current time. 42 void init_random() 43 { 44 srand((unsigned int)time(NULL)); 45 }