Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * syscall_wrapper.h - riscv specific wrappers to syscall definitions
4 *
5 * Based on arch/arm64/include/syscall_wrapper.h
6 */
7
8#ifndef __ASM_SYSCALL_WRAPPER_H
9#define __ASM_SYSCALL_WRAPPER_H
10
11#include <asm/ptrace.h>
12
13asmlinkage long __riscv_sys_ni_syscall(const struct pt_regs *);
14
15#define SC_RISCV_REGS_TO_ARGS(x, ...) \
16 __MAP(x,__SC_ARGS \
17 ,,regs->orig_a0,,regs->a1,,regs->a2 \
18 ,,regs->a3,,regs->a4,,regs->a5,,regs->a6)
19
20#ifdef CONFIG_COMPAT
21
22#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
23 asmlinkage long __riscv_compat_sys##name(const struct pt_regs *regs); \
24 ALLOW_ERROR_INJECTION(__riscv_compat_sys##name, ERRNO); \
25 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
26 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
27 asmlinkage long __riscv_compat_sys##name(const struct pt_regs *regs) \
28 { \
29 return __se_compat_sys##name(SC_RISCV_REGS_TO_ARGS(x,__VA_ARGS__)); \
30 } \
31 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
32 { \
33 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
34 } \
35 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
36
37#define COMPAT_SYSCALL_DEFINE0(sname) \
38 asmlinkage long __riscv_compat_sys_##sname(const struct pt_regs *__unused); \
39 ALLOW_ERROR_INJECTION(__riscv_compat_sys_##sname, ERRNO); \
40 asmlinkage long __riscv_compat_sys_##sname(const struct pt_regs *__unused)
41
42#define COND_SYSCALL_COMPAT(name) \
43 asmlinkage long __weak __riscv_compat_sys_##name(const struct pt_regs *regs); \
44 asmlinkage long __weak __riscv_compat_sys_##name(const struct pt_regs *regs) \
45 { \
46 return sys_ni_syscall(); \
47 }
48
49#endif /* CONFIG_COMPAT */
50
51#define __SYSCALL_DEFINEx(x, name, ...) \
52 asmlinkage long __riscv_sys##name(const struct pt_regs *regs); \
53 ALLOW_ERROR_INJECTION(__riscv_sys##name, ERRNO); \
54 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
55 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
56 asmlinkage long __riscv_sys##name(const struct pt_regs *regs) \
57 { \
58 return __se_sys##name(SC_RISCV_REGS_TO_ARGS(x,__VA_ARGS__)); \
59 } \
60 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
61 { \
62 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
63 __MAP(x,__SC_TEST,__VA_ARGS__); \
64 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
65 return ret; \
66 } \
67 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
68
69#define SYSCALL_DEFINE0(sname) \
70 SYSCALL_METADATA(_##sname, 0); \
71 asmlinkage long __riscv_sys_##sname(const struct pt_regs *__unused); \
72 ALLOW_ERROR_INJECTION(__riscv_sys_##sname, ERRNO); \
73 asmlinkage long __riscv_sys_##sname(const struct pt_regs *__unused)
74
75#define COND_SYSCALL(name) \
76 asmlinkage long __weak __riscv_sys_##name(const struct pt_regs *regs); \
77 asmlinkage long __weak __riscv_sys_##name(const struct pt_regs *regs) \
78 { \
79 return sys_ni_syscall(); \
80 }
81
82#endif /* __ASM_SYSCALL_WRAPPER_H */