1 // SPDX-License-Identifier: GPL-2.0-only 1
2 #ifndef __SELFTESTS_X86_HELPERS_H
3 #define __SELFTESTS_X86_HELPERS_H
4
5 #include <asm/processor-flags.h>
6
7 static inline unsigned long get_eflags(void)
8 {
9 unsigned long eflags;
10
11 asm volatile (
12 #ifdef __x86_64__
13 "subq $128, %%rsp\n\t"
14 "pushfq\n\t"
15 "popq %0\n\t"
16 "addq $128, %%rsp"
17 #else
18 "pushfl\n\t"
19 "popl %0"
20 #endif
21 : "=r" (eflags) :: "memory");
22
23 return eflags;
24 }
25
26 static inline void set_eflags(unsigned long ef
27 {
28 asm volatile (
29 #ifdef __x86_64__
30 "subq $128, %%rsp\n\t"
31 "pushq %0\n\t"
32 "popfq\n\t"
33 "addq $128, %%rsp"
34 #else
35 "pushl %0\n\t"
36 "popfl"
37 #endif
38 :: "r" (eflags) : "flags", "me
39 }
40
41 #endif /* __SELFTESTS_X86_HELPERS_H */
42
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