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