/* SPDX-License-Identifier: GPL-2.0 */
/*
 * syscall_wrapper.h - s390 specific wrappers to syscall definitions
 *
 */

#ifndef _ASM_S390_SYSCALL_WRAPPER_H
#define _ASM_S390_SYSCALL_WRAPPER_H

/* Mapping of registers to parameters for syscalls */
#define SC_S390_REGS_TO_ARGS(x, ...)                                    \
        __MAP(x, __SC_ARGS                                              \
              ,, regs->orig_gpr2,, regs->gprs[3],, regs->gprs[4]        \
              ,, regs->gprs[5],, regs->gprs[6],, regs->gprs[7])

#define SYSCALL_DEFINE0(sname)                                          \
        SYSCALL_METADATA(_##sname, 0);                                  \
        long __s390x_sys_##sname(struct pt_regs *__unused);             \
        ALLOW_ERROR_INJECTION(__s390x_sys_##sname, ERRNO);              \
        static inline long __do_sys_##sname(void);                      \
        long __s390x_sys_##sname(struct pt_regs *__unused)              \
        {                                                               \
                return __do_sys_##sname();                              \
        }                                                               \
        static inline long __do_sys_##sname(void)

#define COND_SYSCALL(name)                                              \
        cond_syscall(__s390x_sys_##name)

#define __S390_SYS_STUBx(x, fullname, name, ...)

#define __SYSCALL_DEFINEx(x, name, ...)                                         \
        long __s390x_sys##name(struct pt_regs *regs);                           \
        ALLOW_ERROR_INJECTION(__s390x_sys##name, ERRNO);                        \
        static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__));    \
        static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__));    \
        __S390_SYS_STUBx(x, name, __VA_ARGS__);                                 \
        long __s390x_sys##name(struct pt_regs *regs)                            \
        {                                                                       \
                return __se_sys##name(SC_S390_REGS_TO_ARGS(x, __VA_ARGS__));    \
        }                                                                       \
        static inline long __se_sys##name(__MAP(x, __SC_LONG, __VA_ARGS__))     \
        {                                                                       \
                __MAP(x, __SC_TEST, __VA_ARGS__);                               \
                return __do_sys##name(__MAP(x, __SC_CAST, __VA_ARGS__));        \
        }                                                                       \
        static inline long __do_sys##name(__MAP(x, __SC_DECL, __VA_ARGS__))

#endif /* _ASM_S390_SYSCALL_WRAPPER_H */