1 files changed, 53 insertions, 0 deletions
diff --git a/tools/testing/selftests/x86/helpers.h b/tools/testing/selftests/x86/helpers.h
new file mode 100644
index 000000000000..6deaad035161
--- /dev/null
+++ b/tools/testing/selftests/x86/helpers.h
@@ -0,0 +1,53 @@
+// 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 */