1 /**
2  * Functions for generating pseudo-random CPER generic processor sections.
3  *
4  * Author: Lawrence.Tang@arm.com
5  **/
6 
7 #include <stdlib.h>
8 #include "../../edk/BaseTypes.h"
9 #include "../gen-utils.h"
10 #include "gen-section.h"
11 
12 //Generates a single pseudo-random generic processor section, saving the resulting address to the given
13 //location. Returns the size of the newly created section.
generate_section_generic(void ** location)14 size_t generate_section_generic(void **location)
15 {
16 	//Create random bytes.
17 	size_t size = generate_random_section(location, 192);
18 
19 	//Set reserved locations to zero.
20 	UINT8 *start_byte = (UINT8 *)*location;
21 	*((UINT64 *)start_byte) &= 0xFFF;
22 	*(start_byte + 12) &= 0x7;
23 	*((UINT16 *)(start_byte + 14)) = 0x0;
24 
25 	//Ensure CPU brand string does not terminate early.
26 	for (int i = 0; i < 128; i++) {
27 		UINT8 *byte = start_byte + 24 + i;
28 		if (*byte == 0x0) {
29 			*byte = rand() % 127 + 1;
30 		}
31 
32 		//Null terminate last byte.
33 		if (i == 127) {
34 			*byte = 0x0;
35 		}
36 	}
37 
38 	return size;
39 }
40