Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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#define SC_ARM64_REGS_TO_ARGS(x, ...) \
12 __MAP(x,__SC_ARGS \
13 ,,regs->regs[0],,regs->regs[1],,regs->regs[2] \
14 ,,regs->regs[3],,regs->regs[4],,regs->regs[5])
15
16#ifdef CONFIG_COMPAT
17
18#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
19 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs); \
20 ALLOW_ERROR_INJECTION(__arm64_compat_sys##name, ERRNO); \
21 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
22 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
23 asmlinkage long __arm64_compat_sys##name(const struct pt_regs *regs) \
24 { \
25 return __se_compat_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
26 } \
27 static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
28 { \
29 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
30 } \
31 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
32
33#define COMPAT_SYSCALL_DEFINE0(sname) \
34 asmlinkage long __arm64_compat_sys_##sname(void); \
35 ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \
36 asmlinkage long __arm64_compat_sys_##sname(void)
37
38#define COND_SYSCALL_COMPAT(name) \
39 cond_syscall(__arm64_compat_sys_##name);
40
41#define COMPAT_SYS_NI(name) \
42 SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers);
43
44#endif /* CONFIG_COMPAT */
45
46#define __SYSCALL_DEFINEx(x, name, ...) \
47 asmlinkage long __arm64_sys##name(const struct pt_regs *regs); \
48 ALLOW_ERROR_INJECTION(__arm64_sys##name, ERRNO); \
49 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
50 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
51 asmlinkage long __arm64_sys##name(const struct pt_regs *regs) \
52 { \
53 return __se_sys##name(SC_ARM64_REGS_TO_ARGS(x,__VA_ARGS__)); \
54 } \
55 static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
56 { \
57 long ret = __do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
58 __MAP(x,__SC_TEST,__VA_ARGS__); \
59 __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
60 return ret; \
61 } \
62 static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
63
64#ifndef SYSCALL_DEFINE0
65#define SYSCALL_DEFINE0(sname) \
66 SYSCALL_METADATA(_##sname, 0); \
67 asmlinkage long __arm64_sys_##sname(void); \
68 ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
69 asmlinkage long __arm64_sys_##sname(void)
70#endif
71
72#ifndef COND_SYSCALL
73#define COND_SYSCALL(name) cond_syscall(__arm64_sys_##name)
74#endif
75
76#ifndef SYS_NI
77#define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers);
78#endif
79
80#endif /* __ASM_SYSCALL_WRAPPER_H */