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
42
43
44
45
46
47
48
49
50
51
|
#pragma once
#include <cstdint>
#include <klibc/string.hpp>
namespace assembly {
inline static std::uint64_t rdmsr(std::uint32_t msr) {
std::uint32_t lo, hi;
__asm__ volatile ("rdmsr" : "=a"(lo), "=d"(hi) : "c"(msr));
return ((std::uint64_t)hi << 32) | lo;
}
inline static void wrmsr(std::uint32_t msr, std::uint64_t value) {
std::uint32_t lo = (uint32_t)(value & 0xFFFFFFFF);
std::uint32_t hi = (uint32_t)(value >> 32);
__asm__ volatile ("wrmsr" : : "c"(msr), "a"(lo), "d"(hi));
}
inline static void cpuid(int code, int code2, std::uint32_t *a, std::uint32_t *b, std::uint32_t *c , std::uint32_t *d) {
__asm__ volatile("cpuid":"=a"(*a),"=b"(*b),"=c"(*c),"=d"(*d):"a"(code),"c"(code2));
}
inline static int cpuid_string(int code, std::uint32_t where[4]) {
__asm__ volatile("cpuid":"=a"(*where),"=b"(*(where+1)),"=c"(*(where+2)),"=d"(*(where+3)):"a"(code));
return (int)where[0];
}
inline static std::uint64_t rdtsc() {
unsigned int hi, lo;
__asm__ volatile ("rdtsc" : "=a"(lo), "=d"(hi));
return ((uint64_t)hi << 32) | lo;
}
inline static bool is_qemu() {
uint32_t a,b,c,d;
cpuid(0x40000000, 0, &a, &b, &c, &d);
char hypervisorSignature[13];
((uint32_t *)hypervisorSignature)[0] = b;
((uint32_t *)hypervisorSignature)[1] = c;
((uint32_t *)hypervisorSignature)[2] = d;
hypervisorSignature[12] = '\0';
if (klibc::memcmp(hypervisorSignature, (void*)"TCGTCGTCGTCG", 12) == 0 || klibc::memcmp(hypervisorSignature, (void*)"KVMKVMKVM\0\0\0", 12) == 0) {
return true;
}
return false;
}
};
|
