1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * syscall_wrapper.h - arm64 specific wrappers to syscall definitions
4 *
5 * Based on arch/x86/include/asm_syscall_wrapper.h
6 */
7
8#ifndef __ASM_SYSCALL_WRAPPER_H
9#define __ASM_SYSCALL_WRAPPER_H
10
11#include <asm/ptrace.h>
12
13#define SC_ARM64_REGS_TO_ARGS(x, ...)				\
14	__MAP(x,__SC_ARGS					\
15	      ,,regs->regs[0],,regs->regs[1],,regs->regs[2]	\
16	      ,,regs->regs[3],,regs->regs[4],,regs->regs[5])
17
18#ifdef CONFIG_COMPAT
19
20#define COMPAT_SYSCALL_DEFINEx(x, name, ...)						\
21	asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs);		\
22	ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO);				\
23	static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));		\
24	static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));	\
25	asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs)		\
26	{										\
27		return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));	\
28	}										\
29	static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))		\
30	{										\
31		return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));	\
32	}										\
33	static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
34
35#define COMPAT_SYSCALL_DEFINE0(sname)							\
36	asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused);	\
37	ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO);			\
38	asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused)
39
40#define COND_SYSCALL_COMPAT(name) 							\
41	asmlinkage long __arm64_compat_sys_##name(const struct pt_regs *regs);		\
42	asmlinkage long __weak __arm64_compat_sys_##name(const struct pt_regs *regs)	\
43	{										\
44		return sys_ni_syscall();						\
45	}
46
47#endif /* CONFIG_COMPAT */
48
49#define __SYSCALL_DEFINEx(x, name, ...)						\
50	asmlinkage long __arm64_sys##name(const struct pt_regs *regs);		\
51	ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO);			\
52	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));		\
53	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));	\
54	asmlinkage long __arm64_sys##name(const struct pt_regs *regs)		\
55	{									\
56		return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__));	\
57	}									\
58	static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))		\
59	{									\
60		long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));	\
61		__MAP(x,__SC_TEST,__VA_ARGS__);					\
62		__PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));		\
63		return ret;							\
64	}									\
65	static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
66
67#define SYSCALL_DEFINE0(sname)							\
68	SYSCALL_METADATA(_##sname, 0);						\
69	asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused);	\
70	ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO);			\
71	asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
72
73#define COND_SYSCALL(name)							\
74	asmlinkage long __arm64_sys_##name(const struct pt_regs *regs);		\
75	asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)	\
76	{									\
77		return sys_ni_syscall();					\
78	}
79
80asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);
81
82#endif /* __ASM_SYSCALL_WRAPPER_H */
83