| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 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 eflags) |
| 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", "memory"); |
| 39 | } |
| 40 | |
| 41 | #endif /* __SELFTESTS_X86_HELPERS_H */ |