selftests/x86/syscall_nt.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * syscall_nt.c - checks syscalls with NT set
4  * Copyright (c) 2014-2015 Andrew Lutomirski
6  * Some obscure user-space code requires the ability to make system calls
56 	printf("[RUN]\tSet NT and issue a syscall\n");  in main()
59 	printf("[RUN]\tSet AC and issue a syscall\n");  in main()
62 	printf("[RUN]\tSet NT|AC and issue a syscall\n");  in main()
66 	 * Now try it again with TF set -- TF forces returns via IRET in all  in main()
67 	 * cases except non-ptregs-using 64-bit full fast path syscalls.  in main()
72 	printf("[RUN]\tSet TF and issue a syscall\n");  in main()
75 	printf("[RUN]\tSet NT|TF and issue a syscall\n");  in main()
78 	printf("[RUN]\tSet AC|TF and issue a syscall\n");  in main()
81 	printf("[RUN]\tSet NT|AC|TF and issue a syscall\n");  in main()
89 	printf("[RUN]\tSet DF and issue a syscall\n");  in main()
92 	printf("[RUN]\tSet TF|DF and issue a syscall\n");  in main()