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 #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 */