arch/arm64/include/asm/syscall_wrapper.h

   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 struct pt_regs;
  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 __weak __arm64_compat_sys_##name(const struct pt_regs *regs)    \
  42         {                                                                               \
  43                 return sys_ni_syscall();                                                \
  44         }
  45
  46 #define COMPAT_SYS_NI(name) \
  47         SYSCALL_ALIAS(__arm64_compat_sys_##name, sys_ni_posix_timers);
  48
  49 #endif /* CONFIG_COMPAT */
  50
  51 #define __SYSCALL_DEFINEx(x, name, ...)                                         \
  52         asmlinkage long __arm64_sys##name(const struct pt_regs *regs);          \
  53         ALLOW_ERROR_INJECTION(__arm64_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 __arm64_sys##name(const struct pt_regs *regs)           \
  57         {                                                                       \
  58                 return __se_sys##name(SC_ARM64_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 __arm64_sys_##sname(const struct pt_regs *__unused);    \
  72         ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO);                      \
  73         asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
  74
  75 #define COND_SYSCALL(name)                                                      \
  76         asmlinkage long __weak __arm64_sys_##name(const struct pt_regs *regs)   \
  77         {                                                                       \
  78                 return sys_ni_syscall();                                        \
  79         }
  80
  81 #define SYS_NI(name) SYSCALL_ALIAS(__arm64_sys_##name, sys_ni_posix_timers);
  82
  83 #endif /* __ASM_SYSCALL_WRAPPER_H */