1 /** 2 * Utility functions to assist in generating pseudo-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. generate_random_section(void ** location,size_t size)13size_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. generate_random_bytes(size_t size)20UINT8 *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 } 26 return bytes; 27 } 28 29 //Creates a valid common CPER error section, given the start of the error section. 30 //Clears reserved bits. create_valid_error_section(UINT8 * start)31void create_valid_error_section(UINT8 *start) 32 { 33 //Fix reserved bits. 34 UINT64 *error_section = (UINT64 *)start; 35 *error_section &= ~0xFF; //Reserved bits 0-7. 36 *error_section &= 0x7FFFFF; //Reserved bits 23-63 37 38 //Ensure error type has a valid value. 39 *(start + 1) = 40 CPER_ERROR_TYPES_KEYS[rand() % (sizeof(CPER_ERROR_TYPES_KEYS) / 41 sizeof(int))]; 42 } 43 44 //Initializes the random seed for rand() using the current time. init_random()45void init_random() 46 { 47 srand((unsigned int)time(NULL)); 48 } 49