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
80 asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused);
81
82 #endif /* __ASM_SYSCALL_WRAPPER_H */
83
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