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-sections.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.
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) &= 0b111;
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     {
28         UINT8* byte = start_byte + 24 + i;
29         if (*byte == 0x0)
30             *byte = rand() % 127 + 1;
31 
32         //Null terminate last byte.
33         if (i == 127)
34             *byte = 0x0;
35     }
36 
37     return size;
38 }