blob: 47b95a5400d68762970164f0bbc8833497060493 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/* Example risc-v-gsp-rm-debugger injected service.
*
* Position-independent, no globals, no libc: safe to load at any address.
* Commands (matching the demo firmware's injected command range):
* 1: xor a0 with 0xbeef
* 2: a0 + a1
* 3: rotate a0 left by (a1 & 63)
* 4: a0 * 3 + 7
* 5: min(a0, a1)
* 6: max(a0, a1)
* default: ~cmd
*/
#include "greeneye_service.h"
__attribute__((noinline)) ge_u64 ge_demo_service_dispatch(ge_u64 cmd, ge_u64 a0, ge_u64 a1)
{
switch (cmd) {
case 1:
return a0 ^ 0xbeefu;
case 2:
return a0 + a1;
case 3: {
unsigned int shift = (unsigned int)(a1 & 63u);
return shift ? ((a0 << shift) | (a0 >> (64u - shift))) : a0;
}
case 4:
return a0 * 3u + 7u;
case 5:
return a0 < a1 ? a0 : a1;
case 6:
return a0 > a1 ? a0 : a1;
default:
return ~cmd;
}
}
/* A second entry point, to demonstrate multi-function services. */
__attribute__((noinline)) ge_u64 ge_demo_service_answer(void)
{
return 42;
}
|
