Linux kernel mirror (for testing)
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linux
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#define COMPAT_SYS_NI(name) \
48 SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers);
49
50#endif /* CONFIG_COMPAT */
51
52#define __SYSCALL_DEFINEx(x, name, ...) \
53 asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \
54 ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \
55 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
56 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
57 asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \
58 asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \
59 { \
60 return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
61 } \
62 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
63 { \
64 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
65 __MAP(x,__SC_TEST,__VA_ARGS__); \
66 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
67 return ret; \
68 } \
69 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
70
71#define SYSCALL_DEFINE0(sname) \
72 SYSCALL_METADATA(_##sname, 0); \
73 asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \
74 ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
75 asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
76
77#define COND_SYSCALL(name) \
78 asmlinkage long __arm64_sys_##name(const struct pt_regs *regs); \
79 asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs) \
80 { \
81 return sys_ni_syscall(); \
82 }
83
84asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);
85#define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers);
86
87#endif /* __ASM_SYSCALL_WRAPPER_H */