syscall_wrapper.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * syscall_wrapper.h - s390 specific wrappers to syscall definitions
 4 *
 5 */
 6
 7#ifndef _ASM_S390_SYSCALL_WRAPPER_H
 8#define _ASM_S390_SYSCALL_WRAPPER_H
 9
10/* Mapping of registers to parameters for syscalls */
11#define SC_S390_REGS_TO_ARGS(x, ...)					\
12	__MAP(x, __SC_ARGS						\
13	      ,, regs->orig_gpr2,, regs->gprs[3],, regs->gprs[4]	\
14	      ,, regs->gprs[5],, regs->gprs[6],, regs->gprs[7])
15
16#define SYSCALL_DEFINE0(sname)						\
17	SYSCALL_METADATA(_##sname, 0);					\
18	long __s390x_sys_##sname(struct pt_regs *__unused);		\
19	ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO);		\
20	static inline long __do_sys_##sname(void);			\
21	long __s390x_sys_##sname(struct pt_regs *__unused)		\
22	{								\
23		return __do_sys_##sname();				\
24	}								\
25	static inline long __do_sys_##sname(void)
26
27#define COND_SYSCALL(name)						\
28	cond_syscall(__s390x_sys_##name)
29
30#define __S390_SYS_STUBx(x, fullname, name, ...)
31
32#define __SYSCALL_DEFINEx(x, name, ...)						\
33	long __s390x_sys##name(struct pt_regs *regs);				\
34	ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO);			\
35	static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__));	\
36	static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__));	\
37	__S390_SYS_STUBx(x, name, __VA_ARGS__);					\
38	long __s390x_sys##name(struct pt_regs *regs)				\
39	{									\
40		return __se_sys##name(SC_S390_REGS_TO_ARGS(x, __VA_ARGS__));	\
41	}									\
42	static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__))	\
43	{									\
44		__MAP(x, __SC_TEST, __VA_ARGS__);				\
45		return __do_sys##name(__MAP(x, __SC_CAST, __VA_ARGS__));	\
46	}									\
47	static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__))
48
49#endif /* _ASM_S390_SYSCALL_WRAPPER_H */