1 files changed, 49 insertions, 0 deletions
diff --git a/arch/s390/include/asm/syscall_wrapper.h b/arch/s390/include/asm/syscall_wrapper.h
new file mode 100644
index 000000000000..9eb58d5348d8
--- /dev/null
+++ b/arch/s390/include/asm/syscall_wrapper.h
@@ -0,0 +1,49 @@
+/* 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 */