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
52
53
|
// SPDX-License-Identifier: GPL-2.0-only
#ifndef __SELFTESTS_X86_HELPERS_H
#define __SELFTESTS_X86_HELPERS_H
#include <signal.h>
#include <string.h>
#include <asm/processor-flags.h>
#include "../kselftest.h"
static inline unsigned long get_eflags(void)
{
#ifdef __x86_64__
return __builtin_ia32_readeflags_u64();
#else
return __builtin_ia32_readeflags_u32();
#endif
}
static inline void set_eflags(unsigned long eflags)
{
#ifdef __x86_64__
__builtin_ia32_writeeflags_u64(eflags);
#else
__builtin_ia32_writeeflags_u32(eflags);
#endif
}
static inline void sethandler(int sig, void (*handler)(int, siginfo_t *, void *), int flags)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_sigaction = handler;
sa.sa_flags = SA_SIGINFO | flags;
sigemptyset(&sa.sa_mask);
if (sigaction(sig, &sa, 0))
ksft_exit_fail_msg("sigaction failed");
}
static inline void clearhandler(int sig)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
if (sigaction(sig, &sa, 0))
ksft_exit_fail_msg("sigaction failed");
}
#endif /* __SELFTESTS_X86_HELPERS_H */
|
