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; <<
10 <<
11 asm volatile ( <<
12 #ifdef __x86_64__ 9 #ifdef __x86_64__
13 "subq $128, %%rsp\n\t" !! 10 return __builtin_ia32_readeflags_u64();
14 "pushfq\n\t" <<
15 "popq %0\n\t" <<
16 "addq $128, %%rsp" <<
17 #else 11 #else
18 "pushfl\n\t" !! 12 return __builtin_ia32_readeflags_u32();
19 "popl %0" <<
20 #endif 13 #endif
21 : "=r" (eflags) :: "memory"); <<
22 <<
23 return eflags; <<
24 } 14 }
25 15
26 static inline void set_eflags(unsigned long ef 16 static inline void set_eflags(unsigned long eflags)
27 { 17 {
28 asm volatile ( <<
29 #ifdef __x86_64__ 18 #ifdef __x86_64__
30 "subq $128, %%rsp\n\t" !! 19 __builtin_ia32_writeeflags_u64(eflags);
31 "pushq %0\n\t" <<
32 "popfq\n\t" <<
33 "addq $128, %%rsp" <<
34 #else 20 #else
35 "pushl %0\n\t" !! 21 __builtin_ia32_writeeflags_u32(eflags);
36 "popfl" <<
37 #endif 22 #endif
38 :: "r" (eflags) : "flags", "me <<
39 } 23 }
40 24
41 #endif /* __SELFTESTS_X86_HELPERS_H */ 25 #endif /* __SELFTESTS_X86_HELPERS_H */
42 26
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.